CN116416908A

CN116416908A - Display method, driving chip, display controller and display control system

Info

Publication number: CN116416908A
Application number: CN202111680023.8A
Authority: CN
Inventors: 何国经; 田征; 王伙荣
Original assignee: Xi'an Ti Pt Sr Electronic Technology Co ltd
Current assignee: Xi'an Ti Pt Sr Electronic Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The invention discloses a display method, a driving chip, a display controller and a display control system. Wherein the method comprises the following steps: acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on a display screen; and correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to target light emitting information. The invention solves the technical problem that the brightness of the display screen cannot be effectively corrected.

Description

Display method, driving chip, display controller and display control system

Technical Field

The invention relates to the field of display screens, in particular to a display method, a driving chip, a display controller and a display control system.

Background

Currently, during the manufacturing process of a display screen, the brightness of the light emitting device on the display screen is usually brighter than the expected brightness, and more brightness of the light emitting device and the expected brightness are still too dark.

In the related art, constant current driving, that is, current through each Light-Emitting Diode (LED) is practically constant, is used for driving the Light-Emitting device. In order to realize the uniformity correction of the display screen display, although for a light emitting device whose light emission information is stronger than the expected light emission information, the intensity of the light emission information of the light emitting device may be lowered, whereas for a light emitting device whose light emission information is weaker than the expected light emission information, if one unit clock period is increased or decreased, the relative change caused to the light emission information of the light emitting device is relatively obvious, so if the unit clock period is adopted as the correction of the light emission information of the light emitting device, it is too rough, and particularly when the light emitting device performs the low gray scale display, the effective correction thereof cannot be realized.

Aiming at the technical problem that the consistency of display screen display cannot be effectively corrected, no effective solution is proposed at present.

Disclosure of Invention

The embodiment of the invention provides a display method, a driving chip, a display controller and a display control system, which are used for at least solving the technical problem that the display consistency of a display screen cannot be effectively corrected.

According to an aspect of an embodiment of the present invention, there is provided a display method. The method may include: acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on a display screen; and correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to target light emitting information. Because the current correction coefficient can be based on the current correction of the light emitting device of the display screen, the current flowing through the light emitting device of the display screen is not constant, so that the light emitting information of the light emitting device corresponding to a plurality of gray scale data comprising high gray scale data or low gray scale data is adjusted, the display accuracy of the light emitting device can be improved, the light emitting information of all the light emitting devices on the display screen tends to be consistent, and the technical effect of effectively correcting the display consistency of the display screen is achieved.

As an alternative embodiment, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes: when the display screen is controlled to display according to the control information of the display screen, the current flowing through the light emitting device of the display screen is corrected according to the current correction coefficient, wherein the control information is used for indicating that the display screen is controlled to display by adjusting the pulse width modulation signal, or the display screen is controlled to display by adjusting the pulse width modulation signal and the current signal, or the display screen is controlled to display by adjusting the current signal, and the technical effect that the consistency of the display screen display can be effectively corrected by adopting the current under the condition of different display control modes of the display screen is achieved.

Optionally, before correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, the method further includes: when the display of the display screen is controlled according to the control information, a first pulse width correction coefficient of the display screen is obtained; the first pulse width modulation signal of the light emitting device of the display screen is adjusted based on the first pulse width correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the first light emitting information to actual light emitting information, and the technical effects that the light emitting device of the display screen is flexibly corrected by performing pulse width correction and then performing current correction in the process of correcting the light emitting device of the display screen are achieved.

Optionally, after correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information, the method further includes: when the display of the display screen is controlled according to the control information, a second pulse width correction coefficient of the display screen is obtained; the second pulse width modulation signal of the light emitting device of the display screen is adjusted based on the second pulse width correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the target light emitting information to the second light emitting information, and the technical effects that the light emitting device of the display screen is flexibly corrected by performing current correction and pulse width correction in the process of correcting the light emitting device of the display screen are achieved.

Optionally, the actual light emitting information includes first initial light emitting information of a light emitting device corresponding to at least one first gray scale data in the plurality of gray scale data of the display screen, the target light emitting information includes first predetermined light emitting information of the light emitting device corresponding to at least one first gray scale data, and the correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information includes: the current flowing through the light emitting device corresponding to the at least one first gray scale data is corrected according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the at least one first gray scale data is adjusted from the first initial light emitting information to first preset light emitting information, and the technical effect that only the current correction is used for the light emitting device corresponding to part of gray scale data in the plurality of gray scale data is achieved.

Optionally, correcting the current flowing through the light emitting device corresponding to the at least one first gray scale data according to the current correction coefficient includes: and if the first gray-scale data is smaller than the target threshold value, correcting the current flowing through the light-emitting device corresponding to the first gray-scale data according to the current correction coefficient, so that the light-emitting device corresponding to the low gray-scale data can be corrected by adopting a current correction method preferably, the fine degree of correcting the low gray-scale data is improved, and the aim of effectively correcting the display consistency of the display screen is fulfilled.

Optionally, the method further comprises: and adjusting a third pulse width adjustment signal of the light emitting device corresponding to at least one second gray scale data in the plurality of gray scale data of the display screen according to a third pulse width correction coefficient of the display screen, so that the light emitting information of the light emitting device corresponding to the at least one second gray scale data is adjusted from the second initial light emitting information of the light emitting device corresponding to the at least one second gray scale data to the second preset light emitting information of the light emitting device corresponding to the at least one second gray scale data, and the technical effect that only pulse width correction is used for the light emitting device corresponding to part of the gray scale data in the plurality of gray scale data is achieved.

Optionally, adjusting a third pulse width adjustment signal of the light emitting device corresponding to at least one second gray scale data in the plurality of gray scale data of the display screen according to a third pulse width correction coefficient of the display screen includes: and if the second gray-scale data is not smaller than the target threshold value, adjusting a third pulse width adjustment signal of the light emitting device corresponding to the second gray-scale data according to a third pulse width correction coefficient, so that the light emitting device corresponding to the non-low gray-scale data can be corrected by adopting a pulse width adjustment correction method preferentially, the correction amplitude of correcting the non-low gray-scale data is improved, and the purpose of effectively correcting the display consistency of the display screen is achieved.

Optionally, a current correction coefficient is obtained: a current correction factor sent by the correction system is obtained.

Optionally, the plurality of gray-scale data of the display screen includes third gray-scale data, the light emitting devices corresponding to the third gray-scale data are controlled by at least one first current respectively to obtain at least one first actual light emitting information of the light emitting devices corresponding to the third gray-scale data, the current correction coefficient is determined by the correction system based on the first light emitting information deviation and the first current light emitting coefficient between each first actual light emitting information and the target light emitting information of the light emitting device corresponding to the third gray-scale data, and the first current light emitting coefficient is used for representing the relation between the current flowing through the light emitting device corresponding to the third gray-scale data and the light emitting information of the light emitting device corresponding to the third gray-scale data, so that the technical effect of determining the current correction coefficient is achieved.

Optionally, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes: when the light-emitting information of the light-emitting device corresponding to the third gray-scale data is the first actual light-emitting information, correcting the current flowing through the light-emitting device corresponding to each gray-scale data according to the current correction coefficient, so that the technical effect of effectively correcting the display consistency of the display screen is achieved.

Optionally, the light emitting device corresponding to each gray-scale data in the plurality of gray-scale data of the display screen is controlled by at least one second current respectively, so as to obtain at least one second actual light emitting information of the light emitting device corresponding to each gray-scale data, the current correction coefficient is determined by the correction system based on a second light emitting information deviation and a second current light emitting information coefficient between each second actual light emitting information and the target light emitting information of the light emitting device corresponding to each gray-scale data, and the second current light emitting information coefficient is used for representing the relation between the current flowing through the light emitting device corresponding to each gray-scale data and the light emitting information of the light emitting device corresponding to each gray-scale data, so that the technical effect of improving the accuracy of the current correction coefficient is achieved.

Optionally, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes: when the light-emitting information of the light-emitting device corresponding to each gray-scale data is the second actual light-emitting information, the current flowing through the light-emitting device corresponding to each gray-scale data is corrected according to the current correction coefficient corresponding to each gray-scale data, so that the technical effect of effectively correcting the display consistency of the display screen is achieved.

According to another aspect of the embodiment of the invention, a driving chip is also provided. The driving chip includes: a memory for storing a current flowing through the light emitting device of the display screen; the current correction circuit is connected with the memory and used for correcting the current according to a current correction coefficient, wherein the current correction coefficient is obtained based on the actual luminous information and the target luminous information of the display screen display target image; and the current source is connected with the current correction circuit and is used for outputting corrected current to the light-emitting device of the display screen so as to control the light-emitting information of the light-emitting device of the display screen to be adjusted from actual light-emitting information to target light-emitting information.

Optionally, the current correction circuit includes: a correction coefficient sub-circuit for storing a current correction coefficient; and the current regulation sub-circuit is connected with the correction coefficient sub-circuit and is used for acquiring a current correction coefficient and current and correcting the current according to the acquired current correction coefficient.

According to another aspect of the embodiment of the invention, a display controller is also provided. The display controller may include: the first acquisition unit is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on the display screen; and the first correction unit is used for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to target light emitting information.

According to another aspect of the embodiment of the invention, a driving chip is also provided. The driving chip may include: the second acquisition unit is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on the actual luminous information and the target luminous information of the target image displayed on the display screen; and a second correction unit for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

According to another aspect of the embodiment of the invention, a display control system is also provided. The system may include: the display controller is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on the display screen; and the driving chip is used for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so as to adjust the light emitting information of the light emitting device of the display screen from actual light emitting information to target light emitting information.

According to another aspect of an embodiment of the present invention, there is also provided a computer-readable storage medium. The computer readable storage medium includes a stored program, wherein the program when executed by a processor controls a device in which the storage medium resides to execute the display method of the display screen of the embodiment of the present invention.

According to another aspect of an embodiment of the present invention, there is also provided a processor. The processor is used for running a program, wherein the program executes the display method of the display screen in the embodiment of the invention when running.

In the embodiment of the invention, by using the method for carrying out consistency correction (current correction and PAM correction) on the display screen by using the current, the current flowing through the light emitting devices of the display screen can be corrected based on the current correction coefficient, so that the current flowing through the light emitting devices of the display screen is not constant, the light emitting information of the light emitting devices corresponding to a plurality of gray scale data comprising high gray scale data or low gray scale data is adjusted, the actual light emitting information stronger than the target light emitting information is weakened, the actual light emitting information weaker than the target light emitting information is strengthened, the display accuracy of correcting the display of the light emitting devices is improved, the light emitting information of all the light emitting devices on the display screen tends to be consistent, the technical problem that the consistency of the display screen display cannot be effectively corrected is solved, and the technical effect of effectively correcting the consistency of the display screen display is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic diagram of a driver chip according to an embodiment of the invention;

FIG. 2 is a schematic diagram of another driver chip according to an embodiment of the invention;

FIG. 3A is a schematic diagram of a display controller according to an embodiment of the present invention;

FIG. 3B is a schematic diagram of another display controller according to an embodiment of the present invention;

FIG. 4A is a schematic diagram of another driver chip according to an embodiment of the invention;

FIG. 4B is a schematic diagram of another driver chip according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a display control system according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another display control system according to an embodiment of the present invention;

fig. 7 is a schematic view of front-rear luminance distribution of a PWM-corrected single-color LED lamp according to one of the related art;

fig. 8 is a flowchart of a display method according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

The embodiment of the invention provides a driving chip.

Fig. 1 is a schematic diagram of a driving chip according to an embodiment of the present invention. As shown in fig. 1, the driving chip 10 may include: a memory 11, a current correction circuit 12 and a current source 13.

And a memory 11 for storing a current flowing through the light emitting device of the display screen.

The driving chip of this embodiment may be a driving IC, for example, an LED screen driving IC, which may obtain a current flowing through a light emitting device of a display screen, and store the current through the memory 11, where the current may be 8-scan 16-channel 8-bit current data, and in practical cases, may be more current data of a line scan number and a channel number, which is not particularly limited herein.

Alternatively, the memory 11 may be a current data latch, which may also be referred to as a current data latch register, which may be used to latch the current flowing through the light emitting device of the display screen, for example, to latch the 8-scan 16-channel 8-bit current data (8×16×8), where the actual situation may latch more rows and channels, which is not limited herein.

And a current correction circuit 12 connected to the memory 11 for correcting the current according to a current correction coefficient obtained based on the actual light emission information and the target light emission information of the display screen displaying the target image.

The current correction circuit 92 of this embodiment may be connected to the memory 91, and may acquire a current correction coefficient, which may be obtained by a correction system based on the actual light emission information and the target light emission information of the target image in advance, or may be obtained by the driver chip itself based on the actual light emission information and the target light emission information of the target image. The current correction circuit 12 corrects the current flowing through the light emitting device of the display screen to realize adjustment of the light emitting information of the light emitting device. The actual light emitting information may be information such as actual brightness, actual chromaticity, actual luminance and the like of the light emitting device, and the target light emitting information is light emitting information to which the actual light emitting information needs to be adjusted, which may be expected light emitting information that should be displayed by the light emitting device corresponding to each gray scale data, for example, information such as ideal brightness, ideal chromaticity, ideal luminance and the like, or any light emitting information in the process of adjusting the actual light emitting information to the expected light emitting information, which may be determined according to a specific application scenario without specific limitation.

Alternatively, the current correction circuit 12 may correct the current flowing through the light emitting device to which each gradation data corresponds, with a current correction coefficient for each gradation data of the target image of this embodiment.

And a current source 13 connected to the current correction circuit 12 for outputting corrected current to the light emitting device of the display screen to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information.

In this embodiment, the driving chip may further include a current source 13 connected to the current correction circuit 92, and may output the corrected current output from the current correction circuit 12 to a light emitting device corresponding to the display screen, so as to control the light emitting device of the display screen, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

The driving chip of this embodiment is further described below.

As an alternative embodiment, the current correction circuit includes: a correction coefficient sub-circuit for storing a current correction coefficient; and the current regulation sub-circuit is connected with the correction coefficient sub-circuit and is used for acquiring a current correction coefficient and current and correcting the current according to the acquired current correction coefficient.

Fig. 2 is a schematic diagram of another driving chip according to an embodiment of the present invention. As shown in fig. 2, the driving chip 10 may include: memory 11, correction coefficient subcircuit 121, current regulation subcircuit 122, and current source 13. The correction coefficient sub-circuit 121 may be configured to acquire a current correction coefficient generated in advance by the correction system, and further store the current correction coefficient. The correction factor sub-circuit 121 may also obtain the current flowing through the light emitting device of the display screen from the memory 11. The current adjusting sub-circuit 122 is connected to the correction coefficient sub-circuit 121, and is configured to obtain a current correction coefficient and a current flowing through the light emitting device of the display screen from the correction coefficient sub-circuit 121, and correct the current flowing through the light emitting device of the display screen according to the obtained current correction coefficient, and further output the corrected current to the current source 13, where the current source 13 may control a channel current of the light emitting device 14 of the display screen, where gray-scale data of the light emitting device 14 may be stored in an external memory 15 located outside the driving chip, the gray-scale data may be 8 x 16 channel 16bit gray-scale data, the external memory 15 may be an image data latch register (8 x 16), and the current source 13 outputs the corrected current to adjust the gray-scale data of the light emitting device 14 stored in the external memory 15, so that the light emitting information of the light emitting device 14 is adjusted from actual light emitting information to target light emitting information, thereby achieving the purpose of controlling the light emitting device of the display screen.

This embodiment may employ a data shift register module to latch the actual current flowing through the light emitting device of the display screen, and then send the gray scale data of the light emitting device to the memory 11 and the external memory 15, respectively. The data shift register module may be used to latch the 8-scan 16-channel 24-bit data, and in practical cases, more line scans and channel numbers may be used, which is not limited herein.

The driving chip of the embodiment can correct the current flowing through the light emitting device of the display screen stored in the memory based on the current correction coefficient through the current correction circuit, so that the current flowing through the light emitting device of the display screen is not constant, and the corrected current is further outputted to the light emitting device of the display screen through the current source, so that the light emitting information of the light emitting device of the display screen is controlled to be adjusted from the actual light emitting information to the target light emitting information, the light emitting information of the light emitting device corresponding to a plurality of gray scale data comprising high gray scale data or low gray scale data is adjusted, the actual light emitting information stronger than the target light emitting information is weakened, the actual light emitting information weaker than the target light emitting information is strengthened, the display accuracy of correcting the display of the light emitting device is improved, the light emitting information of all the light emitting devices on the display screen tends to be consistent, the technical problem that the display consistency of the display screen cannot be effectively corrected is solved, and the technical effect of effectively correcting the display consistency of the display screen is achieved.

Example 2

The embodiment of the invention provides a display controller which can be a receiving card or a TCON chip.

Fig. 3A is a schematic diagram of a display controller according to an embodiment of the invention. As shown in fig. 3A, the display controller 30 may include: a first acquisition unit 31 and a first correction unit 32.

A first obtaining unit 31 for obtaining a current correction coefficient, wherein the current correction coefficient is obtained based on the actual light emitting information and the target light emitting information of the display screen displaying the target image.

In this embodiment, the first obtaining unit 31 in the display controller 30 may obtain the current correction coefficient, which may be obtained by the correction system based on the actual light emission information and the target light emission information of the target image in advance, or may be obtained by the display controller 30 itself based on the actual light emission information and the target light emission information of the target image. The first obtaining unit 31 may correct the current flowing through the light emitting device of the display screen to achieve adjustment of the light emitting information of the light emitting device.

Alternatively, the first obtaining unit 31 of this embodiment may obtain a flow correction coefficient corresponding to each gradation data in the target image displayed on the display screen to correct the current flowing through the light emitting device corresponding to each gradation data.

The first correction unit 32 is configured to correct the current flowing through the light emitting device of the display screen according to the current correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

In this embodiment, after the first acquisition unit 31 acquires the current correction coefficient, the first correction unit 32 acquires the current flowing through the light emitting device of the display screen, that is, the actual current (current data) flowing through the light emitting device corresponding to each gradation data of the target image. The first correction unit 32 may correct the current flowing through the light emitting device of the display screen according to the current correction coefficient obtained by the correction system so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, wherein the current flowing through the light emitting device of the display screen makes the light emitting information actually displayed by the light emitting device of the display screen be the actual light emitting information and the light emitting information that should be displayed is the target light emitting information.

In this embodiment, the first correction unit 32 may directly calculate the current correction coefficient and the actual current flowing through the light emitting device of the display screen, so as to implement a function of calibrating the actual current, for example, the first correction unit 32 directly multiplies or adds or subtracts the current correction coefficient and the actual current to implement correction of the actual current, and the corrected actual current is a current that enables the light emitting information of the light emitting device corresponding to each gray-scale data to be adjusted from the actual light emitting information to the target light emitting information.

Alternatively, the current correction coefficient may be used to represent a quotient between the corrected actual current and the current actual current, so that the first correction unit 32 multiplies the current correction coefficient by the current actual current to obtain the corrected actual current; alternatively, the above-described current correction coefficient may be used to represent the difference between the corrected actual current and the present actual current, so that the first correction unit 32 may obtain the corrected actual current when adding or subtracting the current correction coefficient and the present actual current.

It should be noted that, the correction of the actual current by the first correction unit 32 according to the embodiment is only a preferred implementation of the embodiment of the present invention, and any modification thereof is within the scope of the embodiment, and will not be illustrated herein.

In this embodiment, since the corrected actual current of the first correction unit 32 is a current to be adjusted for the target light-emitting information, the corrected actual current flows through the light-emitting device corresponding to each gray-scale data, so that the light-emitting information of the light-emitting device corresponding to each gray-scale data can be adjusted from the current actual light-emitting information to the target light-emitting information regardless of the high gray-scale data or the low gray-scale data by the first correction unit 32, the actual light-emitting information stronger than the target light-emitting information can be weakened by the first correction unit 32, the actual light-emitting information weaker than the target light-emitting information can be strengthened, the light-emitting information of all the light-emitting devices on the display screen tends to be consistent, the purpose of consistency correction on the display screen is achieved, and finally the actual light-emitting information displayed by the light-emitting device corresponding to each gray-scale data reaches the expected light-emitting information through the correction of the current correction coefficient on the light-emitting device corresponding to each gray-scale data.

It should be noted that, the display controller of this embodiment may be applicable to high-gray-scale data as well as low-gray-scale data, and especially, the light emission information of the low-gray-scale data may be effectively corrected.

It should be noted that, if the actual current flowing through the light emitting device of the display screen can make the actual light emitting information of the light emitting device corresponding to each gray scale data reach the target light emitting information, the actual current flowing through the light emitting device of the display screen may not be corrected by the display controller.

Fig. 3B is a schematic diagram of another display controller according to an embodiment of the invention. As shown in fig. 3B, the display controller 30 is connected to the driving chip 31, the driving chip 31 is connected to the display screen 32, and the display controller 30 performs a current correction method, may fixedly store a current correction coefficient, may correct an actual current of the light emitting device of the video source that is not processed in a previous stage based on the current correction coefficient, obtain a corrected current, may send the corrected current to the driving chip 31, and the driving chip 31 obtains the corrected current, thereby controlling the light emitting information of the light emitting device to be adjusted from the actual light emitting information to the target light emitting information.

The display controller of this embodiment can correct the current flowing through the light emitting device of the display screen obtained by the first obtaining unit according to the current correction coefficient, so that the current flowing through the light emitting device of the display screen is not constant, thus the display controller adjusts the light emitting information of the light emitting device corresponding to the plurality of gray scale data including high gray scale data or low gray scale data, the actual light emitting information stronger than the target light emitting information is weakened, the actual light emitting information weaker than the target light emitting information is strengthened, the display accuracy of correcting the display of the light emitting device is improved, the light emitting information of all the light emitting devices on the display screen tends to be consistent, the technical problem that the display consistency of the display screen cannot be effectively corrected is solved, and the technical effect of effectively correcting the display consistency of the display screen is achieved.

Example 3

The embodiment of the invention also provides another driving chip.

Fig. 4A is a schematic diagram of another driving chip according to an embodiment of the present invention. As shown in fig. 4A, the driving chip 40 may include: a second acquisition unit 41 and a second correction unit 42.

A second acquisition unit 41 for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual light emission information of the display screen displaying the target image and the target light emission information.

In this embodiment, the second acquisition unit 41 in the driving chip 40 may acquire a current correction coefficient to correct the current flowing through the light emitting device of the display screen to realize adjustment of the light emitting information of the light emitting device.

Alternatively, the second acquisition unit 41 of this embodiment may acquire a flow correction coefficient corresponding to each gradation data in the target image displayed on the display screen to correct the current flowing through the light emitting device corresponding to each gradation data.

And a second correction unit 42 for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

In this embodiment, after the second acquisition unit 41 acquires the current correction coefficient, the second correction unit 42 acquires the current flowing through the light emitting device of the display screen. The second correction unit 42 may correct the current flowing through the light emitting device of the display screen according to the current correction coefficient obtained by the correction system so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, wherein the current flowing through the light emitting device of the display screen makes the light emitting information actually displayed by the light emitting device of the display screen be the actual light emitting information and the light emitting information that should be displayed is the target light emitting information.

In this embodiment, the second correction unit 42 may directly calculate the current correction coefficient and the actual current flowing through the light emitting device of the display screen, so as to implement a function of correcting the actual current, for example, the second correction unit 42 directly multiplies or adds or subtracts the current correction coefficient and the actual current to implement correction of the actual current, and the corrected actual current is a current that enables the light emitting information of the light emitting device corresponding to each gray-scale data to be adjusted from the actual light emitting information to the target light emitting information.

Alternatively, the current correction coefficient may be used to represent a quotient between the corrected actual current and the present actual current, so that the second correction unit 42 multiplies the current correction coefficient by the present actual current to obtain the corrected actual current; alternatively, the above-described current correction coefficient may be used to represent the difference between the corrected actual current and the present actual current, so that the second correction unit 42 may obtain the corrected actual current when adding or subtracting the current correction coefficient and the present actual current.

It should be noted that the correction of the actual current by the second correction unit 42 according to this embodiment based on the current correction coefficient is only a preferred implementation of this embodiment of the present invention, and any modification thereof is within the scope of this embodiment, which is not illustrated herein.

In this embodiment, since the corrected actual current of the second correction unit 42 is a current for the target light emitting information, in order to adjust the actual current to the current, the corrected actual current flows through the light emitting device corresponding to each gray scale data, so that no matter the actual current is high gray scale data or low gray scale data, the second correction unit 42 can adjust the light emitting information of the light emitting device corresponding to each gray scale data to the target light emitting information from the current actual light emitting information, so that the second correction unit 42 can weaken the actual light emitting information stronger than the target light emitting information and strengthen the actual light emitting information weaker than the target light emitting information, so that the light emitting information of all the light emitting devices on the display screen tends to be consistent, the purpose of carrying out consistency correction on the display screen is achieved, and finally the actual current of the light emitting device corresponding to each gray scale data is corrected through the current correction coefficient, so that the actual light emitting information displayed by the light emitting device corresponding to each gray scale data reaches the expected light emitting information.

It should be noted that, the driving chip of the embodiment may be applicable to high-gray-scale data as well as low-gray-scale data, and especially, the light-emitting information of the low-gray-scale data may be effectively corrected.

It should be noted that, if the actual current flowing through the light emitting device of the display screen can make the actual light emitting information of the light emitting device corresponding to each gray scale data reach the target light emitting information, the actual current flowing through the light emitting device of the display screen may not be corrected by the driving chip.

Fig. 4B is a schematic diagram of another driving chip according to an embodiment of the invention. As shown in fig. 4B, the display controller 41 is connected to the driving chip 40, the driving chip 40 is connected to the display screen 42, the display controller 41 generates a current correction coefficient and an actual current flowing through the light emitting device under the driving chip 40, the driving chip 40 latches the current correction coefficient, and further performs a current correction method on the driving chip 40, and corrects the actual current flowing through the light emitting device corresponding to the gray-scale data according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the gray-scale data is adjusted from the actual light emitting information to the target light emitting information.

The driving chip of the embodiment can correct the current flowing through the light emitting device of the display screen obtained by the second obtaining unit according to the current correction coefficient, so that the current flowing through the light emitting device of the display screen is not constant, thus the driving chip adjusts the light emitting information of the light emitting device corresponding to the gray scale data comprising the high gray scale data or the low gray scale data, the actual light emitting information stronger than the target light emitting information is weakened, the actual light emitting information weaker than the target light emitting information is strengthened, the display accuracy of correcting the light emitting device is improved, the light emitting information of all the light emitting devices on the display screen tends to be consistent, the technical problem that the display consistency of the display screen cannot be effectively corrected is solved, and the technical effect of effectively correcting the display consistency of the display screen is achieved.

Example 4

The embodiment of the invention also provides a display control system.

Fig. 5 is a schematic diagram of a display control system according to an embodiment of the present invention. As shown in fig. 5, the display control system 50 may include: a display controller 51 and a driving chip 52.

And a display controller 51 for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on the actual light emission information and the target light emission information of the display screen displaying the target image.

In this embodiment, the display controller 51 may be a receiving card or a TCON chip, may acquire a current correction coefficient, and corrects a current flowing through the light emitting device of the display screen to achieve adjustment of light emitting information of the light emitting device.

Alternatively, the display controller 51 of this embodiment may acquire a flow correction coefficient corresponding to each gradation data in the target image displayed on the display screen to correct the current flowing through the light emitting device corresponding to each gradation data.

And a driving chip 52 for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

In this embodiment, the driving chip may be connected to the display controller 51, and after the display controller 51 acquires the current correction coefficient, the driving chip 52 may acquire the current flowing through the light emitting device of the display screen, that is, the actual current (current data) flowing through the light emitting device corresponding to each gray-scale data of the target image. The driving chip 52 may correct the current flowing through the light emitting device of the display screen according to the current correction coefficient obtained by the correction system, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, wherein the current flowing through the light emitting device of the display screen makes the light emitting information actually displayed by the light emitting device of the display screen be the actual light emitting information, and the light emitting information that should be displayed is the target light emitting information.

In this embodiment, the driving chip 52 may directly operate the current correction coefficient and the actual current flowing through the light emitting device of the display screen, so as to implement a function of calibrating the actual current, for example, the driving chip 52 directly multiplies or adds or subtracts the current correction coefficient and the actual current to implement a correction of the actual current, and the corrected actual current is a current that enables the light emitting information of the light emitting device corresponding to each gray-scale data to be adjusted from the actual light emitting information to the target light emitting information.

Alternatively, the current correction coefficient may be used to represent a quotient between the corrected actual current and the current actual current, so that the driving chip 52 multiplies the current correction coefficient by the current actual current to obtain the corrected actual current; alternatively, the current correction coefficient may be used to represent the difference between the corrected actual current and the current actual current, so that the driver chip 52 may obtain the corrected actual current when adding or subtracting the current correction coefficient and the current actual current.

It should be noted that, the correction of the actual current by the driving chip 52 according to this embodiment based on the current correction coefficient is only a preferred implementation of this embodiment of the present invention, and any modification thereof is within the scope of this embodiment, which is not illustrated herein.

It should be noted that, if the actual current flowing through the light emitting device of the display screen can make the actual light emitting information of the light emitting device corresponding to each gray scale data reach the target light emitting information, the display control system may not need to correct the actual current flowing through the light emitting device of the display screen.

Fig. 6 is a schematic diagram of another display control system according to an embodiment of the present invention. As shown in fig. 6, the display control system 60 may include: a display screen 61, an image acquisition device 62, a correction system 63, a display controller 64 and a driving chip 65.

In this embodiment, the image information collecting device 62 may collect image data on the display screen 61 to obtain gray-scale data, and then upload the collected gray-scale data to the correction system 63, where the correction system 23 may obtain a current correction coefficient based on the actual light emitting information of the light emitting device corresponding to the gray-scale data and the target light emitting information, and then send the current correction coefficient to the display controller 51, generate the current correction coefficient and the actual current flowing through the light emitting device under the driving chip 65 through the display controller 51, where all the actual currents issued by the display controller 51 are unprocessed data, and the driving chip 65 latches the current correction coefficient, and then corrects the actual current flowing through the light emitting device corresponding to the gray-scale data in the driving chip 65 according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the gray-scale data is adjusted from the actual light emitting information to the target light emitting information.

Alternatively, the current correction coefficient may be fixedly stored in the display controller 64 in this embodiment, the display controller 64 may correct the actual current of the previous stage untreated light emitting device based on the current correction coefficient, obtain the corrected current, and send the corrected current to the driving chip 65, and the driving chip 65 obtains the corrected current, so as to control the light emitting information of the light emitting device to be adjusted from the actual light emitting information to the target light emitting information.

The display control system of this embodiment may be used to perform a method for performing consistency correction on a display screen using current, and the current flowing through the light emitting device of the display screen obtained by the display controller may be corrected by the driving chip according to the current correction coefficient, so that the current flowing through the light emitting device of the display screen is not constant, so that the display control system adjusts the light emitting information of the light emitting device corresponding to a plurality of gray-scale data including high gray-scale data or low gray-scale data, and may weaken the actual light emitting information stronger than the target light emitting information, and strengthen the actual light emitting information weaker than the target light emitting information, thereby improving the fineness of correcting the display of the light emitting device, making the light emitting information of all the light emitting devices on the display screen tend to be consistent, so as to solve the technical problem that the consistency of the display screen cannot be effectively corrected, and achieve the technical effect of effectively correcting the consistency of the display screen.

Example 5

According to the embodiment of the invention, an embodiment of a display method of a display screen is provided. It should be noted that, the display method of the display screen of this embodiment may be applied to one of the following implementations of the embodiment of the present invention: the display control system comprises a driving chip, a display controller and a display control system. Thus, in this embodiment, the execution subject may be one of the following unless otherwise specified: the driving chip, the display controller and the display control system are understood to be described in further detail in this embodiment.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

In this embodiment, the display may be a full-color display, which may be composed of at least three colors of red, green, and blue lamps in a certain array. Alternatively, the display screen of this embodiment may be a display screen of an LED display terminal used in a traffic system, which may be composed of a plurality of rectangular LED modules, and each rectangular LED module may be composed of a plurality of LED pixels, and each LED pixel may be composed of three or four different color light emitting devices. Wherein, the light emitting device is an LED lamp tube (LED lamp point).

Thus, the brightness variation of each light emitting device on the display screen affects the quality of the target image displayed on the entire display screen. During the production of light emitting devices, a luminance difference of 20% -40% and a chromaticity difference within 5nm may be allowed between different batches of light emitting devices. The brightness difference between pixels which can be distinguished by human eyes is 1-2%, and the chromaticity difference is 1-2 nm. In the outdoor use process of the display screen, as the aging of the light-emitting device can aggravate the brightness attenuation and chromaticity drift of the light-emitting device, the factors can seriously affect the overall brightness of the display screen, and the display screen can be seriously enabled to have a screen pattern phenomenon, so that the screen pattern phenomenon is easier to identify under the condition of low gray data.

In addition, since LEDs are typically brighter than desired during the manufacturing process of LEDs, there are still more LEDs that are too dark compared to desired brightness. Fig. 7 is a schematic diagram of front-rear luminance distribution of a PWM-corrected single-color LED lamp according to one of the related art. As shown in fig. 7, the luminance of the LED lamps before correction is inconsistent, a correction target value may be determined, and the luminance of the LED lamps that are brighter needs to be reduced to the correction target value by PWM pulse width modulation, so that the luminance of all the LED lamps tends to be consistent.

However, too dark LED lamps are also generally present, and the LED lamp can only be corrected by adjusting the pulse width modulation signal (Pulse Width Modulation, abbreviated as PWM) to reduce the brightness of the too bright LED lamp, and the too dark LED lamp is not generally processed.

The method can only reduce the brightness of the LED lamp with higher brightness to a correction target value by changing the pulse width of PWM. But is uncorrectable for relatively dark LED lamps. Especially when the density of the LED lamps is too high, the number of problematic LED lamps becomes large, and the display effect is affected by the LED lamps which are not corrected.

As can be seen from the above description, the related art method only uses a PWM modulation method to perform correction, which may have a certain number of LEDs that are not corrected, thereby having a certain influence on the display effect of the display screen; in addition, since PWM correction is used, there is a certain loss of brightness of the display screen, for example, there is a loss of brightness of high gray-scale data, and there is still a certain problem in terms of color reproducibility.

Since the granularity of the PWM correction is the gray scale clock period representing the PWM unit time. For low-gray-scale data, the relative change caused by increasing or decreasing the unit period by 1 unit period is huge for the brightness of the LED display, so that the minimum granularity of the correction of the PWM unit time is too rough, and the effective correction of the brightness corresponding to the low-gray-scale data part cannot be realized, especially when the gray-scale clock period representing the PWM unit time is lower, the problem is more remarkable.

Correcting the display brightness of the light emitting device corresponding to the gray scale data, wherein the final display condition of the display screen is influenced by the fineness of the correction, and the embodiment introduces current to adjust the brightness of the LEDs, so that the brightness of the darker LEDs can be corrected to be brighter, and the brightness of the brighter LEDs is corrected to be darker, thereby solving the problem that the brightness displayed by the display screen is lost to a certain extent by using PWM correction; in addition, the embodiment can improve the correction fineness of the LED lamp and the correction effect of the low-gray-scale data by a simple current correction method or a PWM correction method and a current correction method. The method of this embodiment is described below.

Fig. 8 is a flowchart of a display method according to an embodiment of the present invention. As shown in fig. 8, the method may include the steps of:

step S802, a current correction coefficient is obtained, wherein the current correction coefficient is obtained based on the actual luminous information and the target luminous information of the target image displayed by the display screen.

In the technical solution provided in the above step S802 of the present invention, the target image is displayed on the display screen. Alternatively, the embodiment may acquire the original image data of the target image, process the original image data by an algorithm, and convert it into a plurality of gradation data (gradation data) which may be used to represent gradation levels of different luminances from dark to light, for example, gradation levels of 256 luminances. Each gray-scale data can be displayed on the display screen through the corresponding light-emitting device, for example, if the gray-scale data is high gray-scale data, the brightness displayed by the corresponding light-emitting device is higher, and for example, if the gray-scale data is low gray-scale data, the brightness displayed by the corresponding light-emitting device is darker, so that a target image can be displayed on the display screen.

The embodiment may acquire a current correction coefficient, which may be obtained in advance based on the actual light emission information and the target light emission information of the target image, and be used to correct the current flowing through the light emitting device of the display screen, so as to adjust the light emission information of the light emitting device. The actual light emitting information may be information such as actual brightness, actual chromaticity, actual luminance and the like of the light emitting device, and the target light emitting information is light emitting information to which the actual light emitting information needs to be adjusted, which may be expected light emitting information that should be displayed by the light emitting device corresponding to each gray scale data, for example, information such as ideal brightness, ideal chromaticity, ideal luminance and the like, or any light emitting information in the process of adjusting the actual light emitting information to the expected light emitting information, which may be determined according to a specific application scenario without specific limitation.

Optionally, each gray-scale data of the target image of the embodiment corresponds to a current correction coefficient to correct a current flowing through the light emitting device corresponding to each gray-scale data.

Step S804, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

In the technical solution provided in the above step S804 of the present invention, after the current correction coefficient is obtained, the current flowing through the light emitting devices of the display screen may be corrected according to the current correction coefficient, and the current flowing through each light emitting device of the display screen may be corrected point by point according to the current correction coefficient, so that the light emitting information of the light emitting devices of the display screen is adjusted from the actual light emitting information to the target light emitting information, where the current flowing through the light emitting devices of the display screen makes the light emitting information actually displayed by the light emitting devices of the display screen be the actual light emitting information, and the light emitting information that should be displayed is the target light emitting information.

In this embodiment, the current flowing through the light emitting device of the display screen, that is, the actual current (current data) flowing through the light emitting device corresponding to each gradation data of the target image. The embodiment can process the original image data of the acquired target image through an algorithm so as to convert the original image data into the actual current.

In this embodiment, the larger the current flowing through the light emitting device corresponding to each gradation data of the target image, the stronger the light emission information of the light emitting device, for example, the stronger the light emitted from the light emitting device, so that the light emitting device exhibits the effect of being brighter in luminance. Assuming that 8 bits (bit) of current data are present, then 256 current steps are present. The actual current is corrected on the basis of the actual current flowing through the light emitting device corresponding to each gray scale data, that is, the actual current is adjusted, so that 256 kinds of current can be selected, and therefore the embodiment corrects the actual current (that is, the reference current) through the current correction coefficient, and the purpose of controlling the change of the light emitting information of the light emitting device corresponding to each gray scale data can be achieved.

However, in the related art, a constant current drive is generally used for driving each light emitting device of the display screen, that is, an actual current flowing through the light emitting device corresponding to each gradation data is constant. The current correction coefficient is used to correct the current flowing through the light emitting device corresponding to each gray scale data, and the current correction coefficient is used to correct the actual current flowing through the light emitting device, so as to adjust the light emitting information of the light emitting device, and further adjust the light emitting information of the light emitting device of the display screen from the actual light emitting information to the target light emitting information. The current correction coefficient corresponds to the current and the actual light-emitting information of the light-emitting device flowing through the display screen, and can be obtained according to the current and the actual light-emitting information of the light-emitting device flowing through the display screen.

Optionally, the embodiment may directly calculate the current correction coefficient and the actual current flowing through the light emitting device of the display screen, so as to implement a function of calibrating the actual current, for example, directly performing operations such as multiplication or addition and subtraction on the current correction coefficient and the actual current, so as to implement correction of the actual current, where the corrected actual current is a current that enables the light emitting information of the light emitting device corresponding to each gray scale data to be adjusted from the actual light emitting information to the target light emitting information.

Alternatively, the current correction coefficient may be used to represent a quotient between the corrected actual current and the current actual current, so that when the current correction coefficient is multiplied by the current actual current, the corrected actual current is obtained; alternatively, the current correction coefficient may be used to represent a difference between the corrected actual current and the current actual current, so that the corrected actual current is obtained when the current correction coefficient is added or subtracted from the current actual current.

It should be noted that the method of correcting the actual current based on the current correction coefficient according to this embodiment is only a preferred implementation of the embodiment of the present invention, and any modification based on the method is within the scope of this embodiment, which is not illustrated herein.

Alternatively, when the actual light emission information is weaker than the target light emission information, the corrected actual current may be greater than the current actual current, and when the actual light emission information is stronger than the target light emission information, the corrected actual current may be smaller than the current actual current, for example, when the actual luminance is smaller than the target luminance, the corrected actual current may be greater than the current actual current, and when the actual luminance is greater than the target luminance, the corrected actual current may be smaller than the current actual current.

In this embodiment, since the corrected actual current is a current to which the actual current is required to be adjusted for the target light-emitting information, the corrected actual current flows through the light-emitting device corresponding to each gray-scale data, so that the light-emitting information of the light-emitting device corresponding to each gray-scale data can be adjusted from the current actual light-emitting information to the target light-emitting information no matter the light-emitting information is high gray-scale data or low gray-scale data, the actual light-emitting information stronger than the target light-emitting information can be weakened, the actual light-emitting information weaker than the target light-emitting information can be strengthened, the light-emitting information of all the light-emitting devices on the display screen tends to be consistent, the purpose of consistency correction on the display screen is achieved, and finally the actual light-emitting information displayed by the light-emitting device corresponding to each gray-scale data reaches the expected light-emitting information through the correction coefficient of the current.

Through the steps S802 to S804, a current correction coefficient is obtained, wherein the current correction coefficient is obtained based on the actual light emitting information and the target light emitting information of the target image displayed on the display screen; and correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to target light emitting information. That is, the present application is a method for performing consistency correction (current correction, PAM correction) on a display screen using a current, which can correct the current flowing through a light emitting device of the display screen based on a current correction coefficient, so that the current flowing through the light emitting device of the display screen is not constant, thus adjusting the light emitting information of the light emitting device corresponding to a plurality of gray scale data including high gray scale data or low gray scale data, weakening the actual light emitting information stronger than the target light emitting information, strengthening the actual light emitting information weaker than the target light emitting information, improving the fineness of correcting the display of the light emitting device, so that the light emitting information of all the light emitting devices on the display screen tends to be consistent, thereby solving the technical problem that the consistency of the display screen cannot be effectively corrected, and achieving the technical effect of effectively correcting the consistency of the display screen.

The above-described method of this embodiment is described in further detail below.

As an alternative embodiment, step S804, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, includes: when the display of the display screen is controlled according to the control information of the display screen, the current flowing through the light emitting device of the display screen is corrected according to the current correction coefficient, wherein the control information is used for controlling the display of the display screen by adjusting the pulse width modulation signal, or controlling the display of the display screen by adjusting the pulse width modulation signal and the current signal, or controlling the display of the display screen by adjusting the current signal.

In this embodiment, control information of the display screen, which can be used to control the display screen to display, can be used to indicate that the display screen display is controlled by PWM (PWM control display), can be acquired. Alternatively, the control information may also represent control of the display screen display by adjusting the current signal (PAM control display). Optionally, the embodiment may further control the display screen to display by adjusting the current signal of the display screen, and particularly, selecting which control information to control the display screen to display may be performed according to a specific application scenario, which is not limited herein.

When the current correction coefficient is used for correcting the current which flows through the light emitting device of the display screen and advances, the current correction coefficient is used for correcting the current which flows through the light emitting device of the display screen, namely, the current correction coefficient is used for correcting the current which flows through the light emitting device of the display screen and is suitable for the display screen to perform PWM control display, PAM control display and control display by adjusting the current signal, so that the display screen can effectively correct the consistency of the display screen display by adopting a current correction method under the condition that the display screen is controlled by different display control modes, the application scene of correcting the consistency of the display screen display by adopting the current correction method is expanded, and the display screen can flexibly and effectively correct the consistency of the display by adopting the current correction method under the control of various display control modes, thereby reducing the limitation of the display control method on the consistency of the display screen display.

As an alternative embodiment, before correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information in step S804, the method further includes: when the display of the display screen is controlled according to the control information, a first pulse width correction coefficient of the display screen is obtained; and adjusting the first pulse width modulation signal of the light emitting device of the display screen based on the first pulse width correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the first light emitting information to actual light emitting information.

In this embodiment, when the display screen is PWM controlled display, PAM controlled display, or display in which the display screen is controlled to display by adjusting the current signal, the current correction method and the PWM correction method may be used in combination in the process of adjusting the actual light emission information of the light emitting device of the display screen, or the light emitting device may be subjected to PWM correction first and then to current correction. Optionally, the embodiment may obtain a first pulse width correction coefficient of the display screen, where the first pulse width correction coefficient is used to implement PWM correction on the display screen, and may obtain a first pulse width modulation signal of a light emitting device of the display screen, and then adjust the first pulse width modulation signal based on the first pulse width correction coefficient, where the granularity of the correction is a gray scale clock period representing PWM unit time, so that the light emitting information of the light emitting device of the display screen is adjusted to actual light emitting information by the first light emitting information, for example, the intensity of the first light emitting information is greater than the actual light emitting information, and may be that the pulse width of the first pulse width modulation signal is changed by the first pulse width correction coefficient, the brightness of the light emitting device of the display screen is reduced to an actual brightness, and then a current correction method in step S804 is adopted, so that the light emitting information of the light emitting device of the display screen is adjusted to target light emitting information by the above-mentioned actual light emitting information, and thus the embodiment can implement a current correction method in which the light emitting device of the display screen is corrected to implement the PWM correction only, and then implement a current correction method in which the PWM correction method is used to implement the PWM correction method, and the PWM correction method is not implemented to implement the PWM correction method.

Alternatively, for the same gray-scale data on the display screen, the embodiment may perform PWM correction on the light emitting device corresponding to the gray-scale data, and then perform PAM correction on the light emitting device, that is, the gray-scale data for which the PWM correction method and the PAM correction method are aimed may overlap. The embodiment can be that a first pulse width correction coefficient for the light emitting device corresponding to the gray scale data is obtained, then a first pulse width modulation signal of the light emitting device corresponding to the gray scale data is adjusted based on the first pulse width correction coefficient, the pulse width of the first pulse width modulation signal of the light emitting device corresponding to the gray scale data is changed through the first pulse width correction coefficient, so that the light emitting information of the light emitting device corresponding to the gray scale data is adjusted to be actual light emitting information through the first light emitting information, then a current correction method is adopted, the current flowing through the light emitting device corresponding to the gray scale data is corrected according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the gray scale data is adjusted to be target light emitting information through the actual light emitting information, and therefore the embodiment fully utilizes the advantages that the amplitude of the PWM correction method for correcting the light emitting device corresponding to the same gray scale data of the display screen is large, and the current correction method for correcting the light emitting device corresponding to the same gray scale data of the display screen is large in fine degree, so that the technical effect of effectively correcting the light emitting device of the display screen is achieved.

For example, the plurality of gray-scale data of the display screen includes gray-scale data 1, gray-scale data 2, gray-scale data 3, gray-scale data 4, gray-scale data 5 and gray-scale data 6, wherein, for the light emitting device corresponding to the gray-scale data 3, the PWM correction method may be used for correction, and then the PAM correction method may be used for correction, that is, the gray-scale data for which the PWM correction method and the PAM correction method of the embodiment are both gray-scale data 3. The embodiment may acquire a first pulse width correction coefficient for the light emitting device corresponding to the gray-scale data 3, then adjust a first pulse width modulation signal of the light emitting device corresponding to the gray-scale data 3 based on the first pulse width correction coefficient, change a pulse width of the first pulse width modulation signal of the light emitting device corresponding to the gray-scale data 3 through the first pulse width correction coefficient, so that light emitting information of the light emitting device corresponding to the gray-scale data 3 is adjusted to actual light emitting information from the first light emitting information, further adopt a PAM correction method, correct current flowing through the light emitting device corresponding to the gray-scale data according to the current correction coefficient corresponding to the gray-scale data 3, so that the light emitting information of the light emitting device corresponding to the gray-scale data 3 is adjusted to target light emitting information from the actual light emitting information, and therefore the embodiment fully utilizes the advantages that the PWM correction method corrects the light emitting device corresponding to the same gray-scale data of the display screen to a large extent, and the current correction method corrects the light emitting device corresponding to the same gray-scale data of the display screen to a large extent, so as to realize the technical effect of effectively correcting the light emitting device of the display screen.

As an alternative embodiment, after correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information in step S804, the method further includes: when the display of the display screen is controlled according to the control information, a second pulse width correction coefficient of the display screen is obtained; the second pulse width modulation signal of the light emitting device of the display screen is adjusted based on the second pulse width correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the target light emitting information to the second light emitting information, and the technical effects that the light emitting device of the display screen is flexibly corrected by performing current correction and pulse width correction in the process of correcting the light emitting device of the display screen are achieved.

In this embodiment, when the display screen is PWM controlled display, PAM controlled display, or display in which the display screen is controlled to display by adjusting the current signal, current correction may be performed on the light emitting device first and then PWM correction may be performed on the light emitting device in the process of adjusting the actual light emitting information of the light emitting device of the display screen. The embodiment may be such that after the current flowing through the light emitting device of the display screen is corrected according to the current correction coefficient to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information, if the target light emitting information at this time is not the expected light emitting information of the light emitting device, it may be further corrected, and may be corrected by using a PWM correction method. Optionally, the embodiment may obtain a second pulse width correction coefficient of the display screen, where the second pulse width correction coefficient is used to adjust a second pulse width modulation signal corresponding to the light emitting device after the actual current flowing through the light emitting device has passed through the current correction, and then adjust, according to the adjusted second pulse width modulation signal, the light emitting information of the light emitting device of the display screen, the target light emitting information obtained by the current correction to be the second light emitting information, where the second light emitting information may be the expected light emitting information that the light emitting device should display, for example, the ideal luminance and/or the ideal chromaticity, or any light emitting information in the process of adjusting the light emitting information of the light emitting device to the expected light emitting information, where the light emitting information may be determined according to a specific application scenario, without making a specific limitation, so that the embodiment may use a mode of combining a current correction method and a PWM correction method, and then use a PWM correction method, and not use only a current correction method to correct, or use only a correction method to correct the target light emitting information, where the light emitting information of the light emitting device of the display screen should be displayed, and implement a large-scale correction effect of the light emitting device of the display screen is achieved by using the PWM correction method.

Alternatively, for the same gray-scale data on the display screen, the embodiment may perform current correction on the light emitting device corresponding to the gray-scale data, and then perform PWM correction on the light emitting device, that is, the gray-scale data for which the PWM correction method and the PAM correction method are aimed may overlap. The embodiment may further adopt a PWM correction method to perform correction after correcting the current flowing through the light emitting device corresponding to the gray-scale data according to the current correction coefficient to control the light emitting information of the light emitting device corresponding to the gray-scale data to be adjusted from the actual light emitting information to the target light emitting information. Optionally, the embodiment may obtain a second pulse width correction coefficient of the light emitting device corresponding to the gray scale data, adjust a second pulse width modulation signal of the light emitting device corresponding to the gray scale data, and then adjust the light emitting information of the light emitting device corresponding to the gray scale data from the target light emitting information to the second light emitting information through the adjusted second pulse width modulation signal, so that the embodiment fully utilizes the advantages of a PWM correction method that the correction amplitude of the light emitting device corresponding to the same gray scale data of the display screen is large, and a current correction method that the correction fineness of the light emitting device corresponding to the same gray scale data of the display screen is large, so as to realize the technical effect of effectively correcting the light emitting device of the display screen.

For example, the plurality of gray-scale data of the display screen includes gray-scale data 1, gray-scale data 2, gray-scale data 3, gray-scale data 4, gray-scale data 5 and gray-scale data 6, wherein, for the light emitting device corresponding to the gray-scale data 4, a PAM correction method may be used for correction, and then a PWM correction method may be used for correction, that is, the gray-scale data for which the PAM correction method and the PWM correction method are both gray-scale data 4. The embodiment may further adopt a PWM correction method to perform correction after correcting the current flowing through the light emitting device corresponding to the gray-scale data 4 according to the current correction coefficient to control the light emitting information of the light emitting device corresponding to the gray-scale data 4 to be adjusted from the actual light emitting information to the target light emitting information. Optionally, the embodiment may obtain the second pulse width correction coefficient of the light emitting device corresponding to the gray scale data 4, adjust the second pulse width modulation signal of the light emitting device corresponding to the gray scale data 4, and then adjust the light emitting information of the light emitting device corresponding to the gray scale data 4 from the target light emitting information to the second light emitting information through the adjusted second pulse width modulation signal, so that the embodiment fully uses the advantages of the PWM correction method that the correction amplitude of the light emitting device corresponding to the same gray scale data of the display screen is large, and the current correction method that the correction fineness of the light emitting device corresponding to the same gray scale data of the display screen is large, so as to realize the technical effect of effectively correcting the light emitting device of the display screen.

In the process of adjusting the light emitting information of the light emitting device of the display screen to the expected light emitting information, the embodiment is not limited to performing the current correction method on the light emitting device first, then performing the PWM correction, or performing the PWM correction first, then performing the current correction method. The PWM correction method and the current correction method of this embodiment may be combined, or only the current correction method is used to adjust the light emission information of the light emitting device to the final expected light emission information, and this method can improve the problem of brightness loss caused by using only PWM correction, and simultaneously, the combination of the current correction improves the fineness of correcting the display of the display screen, and improves the correction effect of the light emitting device corresponding to each gray-scale data, especially the correction effect of the light emitting device corresponding to the low gray-scale data.

As an alternative example, since the human eye is more sensitive to the brightness variation of the light emitting device corresponding to the low gray-scale data, this embodiment may use current correction in combination with PWM correction in the case of the low gray-scale data, and PWM correction in the remaining cases.

As an optional implementation manner, the actual light emitting information includes first initial light emitting information of a light emitting device corresponding to at least one first gray scale data in the plurality of gray scale data of the display screen, and the target light emitting information includes first predetermined light emitting information of the light emitting device corresponding to at least one first gray scale data, where step S804 corrects, according to a current correction coefficient, a current flowing through the light emitting device of the display screen, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, and includes: the current flowing through the light emitting device corresponding to the at least one first gray scale data is corrected according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the at least one first gray scale data is adjusted from the first initial light emitting information to first preset light emitting information, and the technical effect that only the current correction is used for the light emitting device corresponding to part of gray scale data in the plurality of gray scale data is achieved.

In this embodiment, for a plurality of gradation data of a target image of a display screen, only current correction (PAM correction) may be employed for a part of the gradation data therein. Optionally, for at least one first gray-scale data in the plurality of gray-scale data, the actual light-emitting information includes first initial light-emitting information, where the first initial light-emitting information may be light-emitting information of a light-emitting device corresponding to the first gray-scale data when the light-emitting device starts to operate, and the target light-emitting information includes first predetermined light-emitting information, where the first predetermined light-emitting information may be expected light-emitting information of the light-emitting device corresponding to the first gray-scale data. The embodiment may correct the current flowing through the light emitting device corresponding to the first gray-scale data according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the first gray-scale data is adjusted from the first initial light emitting information to the first predetermined light emitting information, that is, the embodiment may correct the current of the light emitting device corresponding to part of the gray-scale data in the plurality of gray-scale data, and may adjust the light emitting device corresponding to part of the gray-scale data from the initial light emitting information to the expected light emitting information through the current correction, without using other correction modes in the process.

Optionally, correcting the current flowing through the light emitting device corresponding to the at least one first gray scale data according to the current correction coefficient includes: and if the first gray-scale data are smaller than the target threshold value, correcting the current flowing through the light emitting device corresponding to each first gray-scale data according to the current correction coefficient.

In this embodiment, specific correction methods may be used for correction in a targeted manner for different gray-scale data, such as the current correction method performed by the display controller 30 shown in fig. 3B, and the current correction method performed by the driving chip 40 shown in fig. 4B. The embodiment may determine whether the first gray-scale data is smaller than a target threshold, where the target threshold may be a critical value for measuring whether the gray-scale data is low gray-scale data. If it is determined that the first gray-scale data is smaller than the target threshold, that is, the first gray-scale data may be low gray-scale data lower than the target threshold, a current correction method may be adopted, and the current flowing through the light emitting device corresponding to each first gray-scale data may be corrected according to the obtained current correction coefficient, that is, the embodiment may preferably adopt the current correction method to correct the light emitting device corresponding to the low gray-scale data, so as to improve the fineness of correcting the low gray-scale data, thereby achieving effective correction on the display consistency of the display screen.

As an alternative embodiment, the method further comprises: and adjusting a third pulse width adjustment signal of the light emitting device corresponding to at least one second gray scale data in the plurality of gray scale data of the display screen according to a third pulse width correction coefficient of the display screen, so that the light emitting information of the light emitting device corresponding to the at least one second gray scale data is adjusted from the second initial light emitting information of the light emitting device corresponding to the at least one second gray scale data to the second preset light emitting information of the light emitting device corresponding to the at least one second gray scale data.

In this embodiment, for a plurality of gradation data of the target image of the display screen, it is possible that only PWM correction is employed for a part of the gradation data therein. Optionally, for at least one second gray-scale data in the plurality of gray-scale data, the actual light-emitting information includes second initial light-emitting information, where the second initial light-emitting information may be light-emitting information of a light-emitting device corresponding to the second gray-scale data when the light-emitting device starts to operate, and the target light-emitting information includes second predetermined light-emitting information, where the second predetermined light-emitting information may be expected light-emitting information of a light-emitting device corresponding to the second gray-scale data. The embodiment can adjust the third pulse width adjustment signal of the light emitting device corresponding to the at least one second gray scale data according to the third pulse width correction coefficient of the display screen, so that the light emitting information of the light emitting device corresponding to the at least one second gray scale data is adjusted to the second preset light emitting information of the light emitting device corresponding to the at least one second gray scale data by the second initial light emitting information of the light emitting device corresponding to the at least one second gray scale data, that is, the embodiment can perform PWM correction on the light emitting device corresponding to part of the gray scale data in the plurality of gray scale data, and can adjust the light emitting device corresponding to the part of the gray scale data from the initial light emitting information to the expected light emitting information by PWM correction without using other correction modes in the process.

As an optional implementation manner, adjusting, according to a third pulse width correction coefficient of the display screen, a third pulse width adjustment signal of a light emitting device corresponding to at least one second gray scale data in the plurality of gray scale data of the display screen includes: and if the second gray-scale data are not smaller than the target threshold value, adjusting a third pulse width adjustment signal of the light emitting device corresponding to the second gray-scale data according to a third pulse width correction coefficient.

In this embodiment, specific correction methods may be used for correction in a targeted manner for different gray-scale data, such as the current correction method performed by the display controller 30 shown in fig. 3B, and the current correction method performed by the driving chip 40 shown in fig. 4B. The embodiment may determine whether the second gray-scale data is smaller than a target threshold. If the second gray-scale data is not smaller than the target threshold value, a PWM correction method may be used to adjust the third pulse width adjustment signal of the light emitting device corresponding to each second gray-scale data according to the third pulse width correction coefficient, that is, the embodiment corrects the light emitting device corresponding to the non-low gray-scale data by preferably using the PWM correction method, so as to increase the correction amplitude of correcting the non-low gray-scale data, thereby achieving effective correction on the display consistency of the display screen.

It should be noted that, in the whole adjustment process of the light emitting information in this embodiment, at least one first gray-scale data corrected only by the PAM correction method and at least one second gray-scale data corrected only by the PWM correction method are not overlapped.

For example, the plurality of gray-scale data of the display screen includes gray-scale data 1, gray-scale data 2, gray-scale data 3, gray-scale data 4, gray-scale data 5 and gray-scale data 6, where the gray-scale data 1 and the gray-scale data 2 are the first gray-scale data, and are both smaller than a target threshold, the light-emitting device corresponding to the gray-scale data 1 is only corrected by using a PAM correction method, and the current flowing through the light-emitting device corresponding to the gray-scale data 1 can be corrected according to the current correction coefficient corresponding to the gray-scale data 1, so that the light-emitting information of the light-emitting device corresponding to the gray-scale data 1 is adjusted from the first initial light-emitting information to the first predetermined light-emitting information, and the light-emitting device corresponding to the gray-scale data 2 is only corrected by using the PAM correction method, and the current flowing through the light-emitting device corresponding to the gray-scale data 2 can be corrected according to the current correction coefficient corresponding to the gray-scale data 2, so that the light-emitting information of the light-emitting device corresponding to the gray-scale data 2 is adjusted from the first initial light-emitting information to the first predetermined light-emitting information; the gray-scale data 5 and the gray-scale data 6 are the second gray-scale data, and are not smaller than the target threshold, the light-emitting device corresponding to the gray-scale data 5 is corrected only by adopting a PWM correction method, the third pulse width adjustment signal of the light-emitting device corresponding to the gray-scale data 5 can be corrected according to the third pulse width correction coefficient corresponding to the gray-scale data 5, so that the light-emitting information of the light-emitting device corresponding to the gray-scale data 5 is adjusted to the second predetermined light-emitting information of the light-emitting device corresponding to the gray-scale data 5 by the second initial light-emitting information of the light-emitting device corresponding to the gray-scale data 5, the gray-scale data 6 is corrected only by adopting the PWM correction method, and the third pulse width adjustment signal of the light-emitting device corresponding to the gray-scale data 6 can be corrected according to the third pulse width correction coefficient corresponding to the gray-scale data 6, so that the light-emitting information of the light-emitting device corresponding to the gray-scale data 6 is adjusted to the second predetermined light-emitting information of the light-emitting device corresponding to the gray-scale data 6 by the second initial light-emitting information of the light-emitting device corresponding to the gray-scale data 6.

Therefore, the embodiment can be used for correcting the light emitting device corresponding to the gray scale data by adopting a PAM correction method and a PWM correction method, and part of gray scale data corresponding to the PAM correction method and part of gray scale data corresponding to the PWM correction method in the plurality of gray scale data can be overlapped or not overlapped, so that the flexibility and the effectiveness of correcting the gray scale data are improved.

It should be noted that, the above-mentioned gray-scale data 1, gray-scale data 2, gray-scale data 3, gray-scale data 4, gray-scale data 5, and gray-scale data 6, and the correction method adopted by the light emitting device corresponding to each gray-scale data are only an illustration of the embodiment of the present invention, and the method for correcting the light emitting device corresponding to the gray-scale data is not limited, and may be flexibly adopted according to the actual scene application, and is not illustrated one by one.

As an alternative embodiment, acquiring the current correction coefficient includes: a current correction factor sent by the correction system is obtained.

In this embodiment, the current correction coefficient may be generated by the correction system, and the current correction coefficient transmitted by the correction system may be acquired when the acquisition of the current correction coefficient is implemented.

As an optional implementation manner, the plurality of gray-scale data of the display screen includes third gray-scale data, the light emitting devices corresponding to the third gray-scale data are respectively controlled by at least one first current to obtain at least one first actual light emitting information of the light emitting devices corresponding to the third gray-scale data, the current correction coefficient is determined by the correction system based on the first light emitting information deviation and the first current light emitting coefficient between each first actual light emitting information and the target light emitting information of the light emitting device corresponding to the third gray-scale data, and the first current light emitting coefficient is used for representing the relation between the current flowing through the light emitting device corresponding to the third gray-scale data and the light emitting information of the light emitting device corresponding to the third gray-scale data.

In this embodiment, the correction system 63 shown in fig. 6 may determine the current correction coefficient using a single gray-scale data, i.e., the embodiment may use the same current correction coefficient for different gray-scale data. Alternatively, the correction system of this embodiment determines the third gray-scale data among the plurality of gray-scale data, and the third gray-scale data may be any gray-scale data among the plurality of gray-scale data. The correction system of the embodiment can control the light emitting device corresponding to the third gray scale data through at least one first current, optionally, the embodiment can display the color of the third gray scale data on the whole display screen, then change the current of the light emitting device corresponding to the third gray scale data to obtain a first current, the embodiment can change the current of the light emitting device corresponding to the third gray scale data for many times to obtain a plurality of first currents, the light emitting device corresponding to the third gray scale data can be controlled through the plurality of first currents to obtain a plurality of first actual light emitting information, wherein each first current corresponds to one first actual light emitting information, the first actual light emitting information corresponding to different first currents can be different, namely, the size of the current is changed, light emitting information is adjusted, the correction system can obtain first light emitting information deviation between each first actual light emitting information and the target light emitting information of the light emitting device corresponding to the third gray scale data, the correction system can obtain a first current light emitting coefficient, the first current light emitting coefficient can be controlled through the light emitting device corresponding to the third gray scale data, the current corresponding to the first current correction coefficient can be determined according to the current correction information coefficient, and the current deviation between the first gray scale data corresponding to the light emitting device can be corrected, and the current corresponding to the first gray scale data can be corrected, and the current coefficient can be determined.

As an alternative example, in the case where the light emitting information of the light emitting device is luminance, the actual luminance and the expected luminance of the light emitting device corresponding to the third gray-scale data may be collected in the correction system, and the first luminance deviation between the two may be calculated, for example, αnit. Optionally, the embodiment may display the color of the third gray-scale data on the display screen, and then change the current of the light emitting device corresponding to the third gray-scale data to obtain the first current, optionally, the correction system of the embodiment may change the current of the light emitting device corresponding to the third gray-scale data multiple times to obtain multiple first currents, and control the light emitting device corresponding to the third gray-scale data through the multiple first currents to obtain multiple first luminances, where each first luminance corresponds to each first current, and each first luminance is the luminance when the light emitting device corresponding to the third gray-scale data is displayed, that is, change the magnitude of the current, perform luminance adjustment, and then determine the current correction coefficient in the correction system based on the first luminance deviation and the first current luminous coefficient, where the first current luminous coefficient is used to represent the relationship between the current flowing through the light emitting device corresponding to the third gray-scale data and the luminance of the light emitting device corresponding to the third gray-scale data, that is used to characterize the influence of the current on the light emitting device corresponding to the third gray-scale data.

Alternatively, the correction system of this embodiment may determine, when the actual luminance of the light emitting device corresponding to the third gray-scale data is adjusted by each unit luminance, a current to be adjusted for the current at that time to obtain the first current light emitting coefficient, for example, the luminance is set to nit, the current to be adjusted for the actual luminance of the light emitting device corresponding to the third gray-scale data is set to δma, that is, the first current light emitting coefficient may be δma/nit, and the correction system may determine, based on the first luminance deviations αnit and δma/nit, a current (α×δ) mA to be adjusted, and further determine, based on the current (α×δ) mA to be adjusted, the current correction coefficient, and may determine, as the current correction coefficient, the current to be adjusted, or the quotient between the sum of the first current and the current to be adjusted and the first current.

After the correction system determines the current correction coefficient of the third gradation data, the current correction coefficient may be fixedly stored to the controller (receiving card) or stored inside the driving chip (LED driving IC, LED display driving chip).

It should be noted that, in the method for determining the current correction coefficient by using single gray-scale data according to this embodiment, the actual light emitting information of the display screen display target image and the target light emitting information may be calculated by the correction system, or the driving chip itself or the display controller itself may be calculated by the method, and may be flexibly selected according to a specific application scenario.

As an alternative embodiment, step S804, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, includes: when the light-emitting information of the light-emitting device corresponding to the third gray-scale data is the first actual light-emitting information, correcting the current flowing through the light-emitting device corresponding to each gray-scale data according to the current correction coefficient, so that the technical effect of effectively correcting the display consistency of the display screen is achieved.

In this embodiment, when the correction of the current flowing through the light emitting device of the display screen according to the current correction coefficient is implemented, it may be determined whether the light emitting information of the light emitting device corresponding to the third gray-scale data is the above-described arbitrary first actual light emitting information, and if it is determined that the light emitting information of the light emitting device corresponding to the third gray-scale data is the above-described arbitrary first actual light emitting information, the current flowing through the light emitting device corresponding to each gray-scale data may be corrected by the current correction coefficient corresponding to the third gray-scale data, that is, the current correction coefficient corresponding to the third gray-scale data in this embodiment may be used for the current correction of the light emitting device corresponding to each gray-scale data, so as to reduce the cost of performing the current correction on the light emitting device.

As an optional implementation manner, the light emitting device corresponding to each gray-scale data in the plurality of gray-scale data of the display screen is controlled by at least one second current respectively, so as to obtain at least one second actual light emitting information of the light emitting device corresponding to each gray-scale data, the current correction coefficient is determined by the correction system based on a second light emitting information deviation and a second current light emitting information coefficient between each second actual light emitting information and the target light emitting information of the light emitting device corresponding to each gray-scale data, and the second current light emitting information coefficient is used for representing the relation between the current flowing through the light emitting device corresponding to each gray-scale data and the light emitting information of the light emitting device corresponding to each gray-scale data, so that the technical effect of improving the accuracy of the current correction coefficient is achieved.

In this embodiment, the current correction coefficient determined by using a single gray scale also has a certain error because the effect on the brightness of the light emitting devices is not completely uniform by changing the current flowing through the same magnitude of the light emitting devices corresponding to different gray scale data. The embodiment can obtain the current correction coefficients under a plurality of different gray-scale data from the correction system.

Alternatively, the correction system 63 shown in fig. 6 determines the current correction coefficient, and the embodiment acquires a plurality of second gray-scale data, which may range from 0 to 255. The embodiment can control the light emitting device corresponding to each gray scale data through at least one second current, optionally, the correction system of the embodiment can change the current of the light emitting device corresponding to each gray scale data to obtain a second current, the embodiment can change the current of the light emitting device corresponding to each gray scale data for multiple times to obtain multiple second currents, the light emitting device corresponding to each gray scale data can be controlled through the multiple second currents to obtain multiple second actual light emitting information, wherein each second current corresponds to one second actual light emitting information, the second actual light emitting information corresponding to different second currents can be different, namely, the size of the current is changed, light emitting information adjustment is performed, the correction system can further obtain second light emitting information deviation between each second actual light emitting information and target light emitting information of the light emitting device corresponding to each gray scale data, and further obtain a second current light emitting coefficient, the second current light emitting coefficient is a light emitting relation between the current flowing through the light emitting device corresponding to each gray scale data and the light emitting device corresponding to each gray scale data, and the correction system can further determine the second current deviation information corresponding to each gray scale data.

The embodiment can determine the relation between the current and the brightness of the light emitting devices corresponding to all the gray scale data, and can obtain the current correction coefficients under a plurality of groups of different gray scale data. For different precision requirements, different gray-scale data can select one or more groups of current correction coefficients, so that the purpose of effectively correcting display consistency information of a display screen is achieved.

As an alternative example, in the case where the light emission information of the light emitting device is luminance, the correction system of this embodiment may collect the actual luminance and the expected luminance of the light emitting device corresponding to each gray-scale data, and calculate the second luminance deviation therebetween, for example, α' nit. Optionally, for each arbitrary gray-scale data, the color of the gray-scale data may be displayed on the display screen, then the current of the light emitting device corresponding to the gray-scale data is changed to obtain a second current, optionally, the correction system of this embodiment may change the current of the light emitting device corresponding to the gray-scale data multiple times, so as to obtain multiple second currents, and control the light emitting device corresponding to the gray-scale data through the multiple second currents, so as to obtain multiple second luminances, where each second luminance corresponds to each second current, and each second luminance is the luminance when the light emitting device corresponding to the gray-scale data is displayed, that is, the magnitude of the current is changed, so that the luminance is adjusted, and then the correction system may determine a current correction coefficient based on the second luminance deviation and the second current luminance coefficient, where the second current luminance coefficient is used to represent the relationship between the current flowing through the light emitting device corresponding to the gray-scale data and the luminance of the light emitting device corresponding to the gray-scale data, that is, the relationship between the luminance coefficients is used to characterize the influence of the current on the light emitting device corresponding to the gray-scale data.

Alternatively, the correction system of this embodiment may determine, when the actual luminance of the light emitting device corresponding to each gray-scale data is adjusted by each unit luminance, a current to be adjusted for the current at that time to obtain the second current light emitting coefficient, for example, the luminance is set to nit, the current to be adjusted for the actual luminance of the light emitting device corresponding to the gray-scale data is set to δma, that is, the second current light emitting coefficient may be δ ' mA/nit, and further, a current (α ' ×δ ') mA to be adjusted may be determined based on the second luminance deviations α ' nit and δ ' mA/nit, and further, the correction system may determine the current correction coefficient based on the current (α ' ×δ ') mA to be adjusted, and the correction system may determine the current to be adjusted as the current correction coefficient, or may determine a quotient between the sum of the second current and the current to be adjusted and the second current as the current correction coefficient.

After the correction system determines the current correction coefficient corresponding to each gray-scale data, the current correction coefficient corresponding to each gray-scale data may be fixedly stored in the controller (receiving card), or the current correction coefficient corresponding to each gray-scale data may be stored in the driving chip. This embodiment can select the corresponding appropriate current correction coefficients for different gray scale data for different accuracy requirements.

It should be noted that, in the method for obtaining the current correction coefficients under the plurality of different gray-scale data in this embodiment, the current correction coefficients may be obtained by calculating the actual light emitting information and the target light emitting information of the target image displayed by the display screen through the correction system, or may be obtained by calculating the current correction coefficients by the driving chip itself or the display controller itself through the method, and may be flexibly selected according to a specific application scenario.

As an alternative embodiment, step S804, correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, includes: when the light-emitting information of the light-emitting device corresponding to each gray-scale data is the second actual light-emitting information, the current flowing through the light-emitting device corresponding to each gray-scale data is corrected according to the current correction coefficient corresponding to each gray-scale data, so that the technical effect of effectively correcting the display consistency of the display screen is achieved.

In this embodiment, when the correction of the current flowing through the light emitting device of the display screen according to the current correction coefficient is implemented, it may be determined whether the light emitting information of the light emitting device corresponding to each gray-scale data is the second actual light emitting information corresponding to the light emitting device, and if it is determined that the light emitting information of the light emitting device corresponding to each gray-scale data is the second actual light emitting information corresponding to the light emitting device, the correction of the current flowing through the light emitting device corresponding to each gray-scale data is implemented according to the current correction coefficient corresponding to each gray-scale data.

As an alternative embodiment, a current correction coefficient is stored in the controller, and step S804 of correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes: the current flowing through the light emitting device of the display screen is corrected in the controller according to the current correction coefficient.

In this embodiment, the current correction coefficient may be fixedly stored in advance in a controller (a receiving card or a display control chip, i.e., TCON chip), and the controller may correct the current flowing through the light emitting device of the display screen according to the current correction coefficient. The embodiment can correct the actual current flowing through the light emitting devices corresponding to each gray scale data based on the current correction coefficient corresponding to each gray scale data in the controller, namely, correct the display screen point by point (light emitting devices by light emitting device) in the controller, so as to ensure the display consistency of the display screen. Alternatively, the controller may issue a correction result of an actual current flowing through the light emitting device corresponding to each gray scale data to the driving chip.

As an alternative embodiment, a current correction coefficient is stored in the driving chip, and step S804 of correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes: the current flowing through the light emitting device of the display screen is corrected in the driving chip according to the current correction coefficient.

In this embodiment, the current correction coefficient may be latched in the driving chip, or may be issued to the driving chip by the controller, that is, the current correction coefficient may be written in the driving chip in advance by the controller, where the controller is located at a previous stage of the driving chip, and the driving chip itself corrects the current flowing through the light emitting device of the display screen according to the current correction coefficient. The embodiment can correct the current flowing through the light emitting device of the display screen based on the current correction coefficient corresponding to each gray scale data in the driving chip, namely, the display screen is corrected point by point in the driving chip, so that the display consistency of the display screen is ensured.

In this embodiment, the original image data of the target image is initially acquired, and may be subjected to an algorithm to convert the image data into current flowing through the light emitting device of the display screen and corresponding gray scale data. And then correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient obtained during the previous test, or if the current flowing through the light emitting device of the display screen can enable the actual light emitting information of the light emitting device to be the target light emitting information, not correcting the current. And then controlling the information display of the light emitting devices corresponding to each gray scale data through the corrected actual current, so that the actual light emitting information is consistent with the target light emitting information, and the brightness of all the light emitting devices on the display screen tends to be consistent, thereby realizing the purpose of effectively correcting the brightness of the display screen.

The display method of the display screen of the embodiment can be a method for carrying out consistency correction on the display screen by using current, can be applied to a driving chip and a display system, can introduce current correction on the basis of PWM correction, improves the brightness loss problem caused by PWM correction, improves the correction fineness, improves the correction effect of each gray-scale data, particularly the correction effect of low gray-scale data, ensures that the brightness of all light emitting devices on the display screen tends to be consistent, solves the technical problem that the consistency of the display screen display cannot be effectively corrected, and further achieves the technical effect of effectively correcting the consistency of the display screen display.

Example 6

According to an embodiment of the present invention, there is also provided a computer-readable storage medium. The computer readable storage medium includes a stored program, wherein the program when executed by a processor controls a device in which the storage medium resides to execute a display method of a display screen according to an embodiment of the present invention.

Example 7

According to the embodiment of the invention, a processor is further provided, and the processor is used for running a program, wherein the processor is used for running the program, and the display method of the display screen is executed when the program runs.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A display method, comprising:

acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on a display screen;

and correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted to the target light emitting information from the actual light emitting information.

2. The display method according to claim 1, wherein correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes:

and correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient when the display screen is controlled to display according to the control information of the display screen, wherein the control information is used for controlling the display screen to display by adjusting a pulse width modulation signal, controlling the display screen to display by adjusting the pulse width modulation signal and the current signal, or controlling the display screen to display by adjusting the current signal.

3. The display method according to claim 2, wherein before correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information, the method further comprises:

when the display screen is controlled to display according to the control information, a first pulse width correction coefficient of the display screen is obtained;

and adjusting a first pulse width modulation signal of the light emitting device of the display screen based on the first pulse width correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from first light emitting information to the actual light emitting information.

4. The display method according to claim 2, wherein after correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information, the method further comprises:

when the display screen is controlled to display according to the control information, a second pulse width correction coefficient of the display screen is obtained;

And adjusting a second pulse width modulation signal of the light emitting device of the display screen based on the second pulse width correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted from the target light emitting information to second light emitting information.

5. The display method according to claim 1, wherein the actual light emission information includes first initial light emission information of a light emitting device corresponding to at least one first gray scale data among a plurality of gray scale data of the display screen, the target light emission information includes first predetermined light emission information of the light emitting device corresponding to the at least one first gray scale data, and wherein correcting a current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emission information of the light emitting device of the display screen is adjusted from the actual light emission information to the target light emission information includes:

and correcting the current flowing through the light emitting device corresponding to the at least one first gray scale data according to the current correction coefficient, so that the light emitting information of the light emitting device corresponding to the at least one first gray scale data is adjusted from the first initial light emitting information to the first preset light emitting information.

6. The display method according to claim 5, wherein correcting the current flowing through the light emitting device corresponding to the at least one first gray scale data according to the current correction coefficient comprises:

and if the first gray-scale data are smaller than the target threshold value, correcting the current flowing through the light emitting device corresponding to each first gray-scale data according to the current correction coefficient.

7. The display method according to claim 5, characterized in that the method further comprises:

and adjusting a third pulse width adjustment signal of the light emitting device corresponding to at least one second gray scale data in the plurality of gray scale data of the display screen according to the third pulse width correction coefficient of the display screen, so that the light emitting information of the light emitting device corresponding to the at least one second gray scale data is adjusted to be second preset light emitting information of the light emitting device corresponding to the at least one second gray scale data by the second initial light emitting information of the light emitting device corresponding to the at least one second gray scale data.

8. The display method according to claim 7, wherein adjusting the third pulse width adjustment signal of the light emitting device corresponding to at least one second gray scale data of the plurality of gray scale data of the display screen according to the third pulse width correction coefficient of the display screen comprises:

And if the second gray-scale data are not smaller than the target threshold value, adjusting the third pulse width adjustment signals of the light emitting devices corresponding to the second gray-scale data according to the third pulse width correction coefficients.

9. The display method according to claim 1, wherein acquiring the current correction coefficient includes:

the current correction factor transmitted by the correction system is obtained.

10. The display method according to claim 9, wherein the plurality of gray-scale data of the display screen includes third gray-scale data, the light emitting devices corresponding to the third gray-scale data are respectively controlled by at least one first current to obtain at least one first actual light emitting information of the light emitting devices corresponding to the third gray-scale data, the current correction coefficient is determined by the correction system based on a first light emitting information deviation between each of the first actual light emitting information and the target light emitting information of the light emitting device corresponding to the third gray-scale data, and a first current light emitting coefficient, and the first current light emitting coefficient is used for representing a relationship between a current flowing through the light emitting device corresponding to the third gray-scale data and the light emitting information of the light emitting device corresponding to the third gray-scale data.

11. The display method according to claim 10, wherein correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes:

and correcting the current flowing through the light emitting device corresponding to each gray scale data according to the current correction coefficient when the light emitting information of the light emitting device corresponding to the third gray scale data is the first actual light emitting information.

12. The display method according to claim 9, wherein the light emitting device corresponding to each of the plurality of gray-scale data of the display screen is controlled by at least one second current to obtain at least one second actual light emitting information of the light emitting device corresponding to each of the gray-scale data, and the current correction coefficient is determined by the correction system based on a second light emitting information deviation between each of the second actual light emitting information and the target light emitting information of the light emitting device corresponding to each of the gray-scale data, and a second current light emitting information coefficient, and the second current light emitting information coefficient is used for representing a relationship between a current flowing through the light emitting device corresponding to each of the gray-scale data and the light emitting information of the light emitting device corresponding to each of the gray-scale data.

13. The display method according to claim 12, wherein correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient includes:

and when the light emitting information of the light emitting device corresponding to each gray scale data is the second actual light emitting information, correcting the current flowing through the light emitting device corresponding to each gray scale data according to the current correction coefficient corresponding to each gray scale data.

14. A driver chip, comprising:

a memory for storing a current flowing through the light emitting device of the display screen;

the current correction circuit is connected with the memory and is used for correcting the current according to a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on the display screen;

and the current source is connected with the current correction circuit and is used for outputting the corrected current to the light emitting device of the display screen so as to control the light emitting information of the light emitting device of the display screen to be adjusted from the actual light emitting information to the target light emitting information.

15. The driver chip of claim 14, wherein the current correction circuit comprises:

A correction factor sub-circuit for storing the current correction factor;

and the current regulation sub-circuit is connected with the correction coefficient sub-circuit and is used for acquiring the current correction coefficient and the current and correcting the current according to the acquired current correction coefficient.

16. A display controller, comprising:

the first acquisition unit is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a display screen display target image;

and the first correction unit is used for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so that the light emitting information of the light emitting device of the display screen is adjusted to the target light emitting information from the actual light emitting information.

17. A driver chip, comprising:

the second acquisition unit is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a display screen display target image;

and a second correction unit for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient, so that the light emitting information of the light emitting device of the display screen is adjusted from the actual light emitting information to the target light emitting information.

18. A display control system, comprising:

the display controller is used for acquiring a current correction coefficient, wherein the current correction coefficient is obtained based on actual luminous information and target luminous information of a target image displayed on the display screen;

and the driving chip is used for correcting the current flowing through the light emitting device of the display screen according to the current correction coefficient so as to adjust the light emitting information of the light emitting device of the display screen from the actual light emitting information to the target light emitting information.