CN114283733B

CN114283733B - Control method and control device of display device, driving chip and display device

Info

Publication number: CN114283733B
Application number: CN202210101527.8A
Authority: CN
Inventors: 喻勇; 李传勇
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2024-01-23
Anticipated expiration: 2042-01-27
Also published as: CN114283733A

Abstract

A control method of display equipment is disclosed, which relates to the technical field of display and is used for improving the short-time afterimage problem of the display equipment. The control method of the display device includes: in a screen-off display mode, writing at least one frame of preset data voltage signals into a plurality of sub-pixels in display equipment in response to a mode switching instruction, and controlling the plurality of sub-pixels not to emit light; wherein, the gray scale corresponding to the data voltage signal preset in at least the last frame is larger than or equal to the gray scale threshold value; after the data voltage signal preset in the last frame is written into the plurality of sub-pixels, the display equipment is controlled to switch to the display mode indicated by the mode switching instruction. According to the control method of the display device, the gray scales of the plurality of sub-pixels in the display device are changed, so that the plurality of sub-pixels in the display device are in a higher gray scale, and the visual afterimage phenomenon caused by long recovery time when the low gray scale is switched to the middle gray scale or higher gray scale is improved.

Description

Control method and control device of display device, driving chip and display device

Technical Field

The disclosure relates to the technical field of display, and in particular relates to a control method and device of display equipment, a driving chip and the display equipment.

Background

With the development of electronic technology, the screen can be locally lightened in a screen locking state. This locally lit screen display mode is referred to as a off screen display mode (Always On Display, AOD).

In the AOD display mode, the display screen is only partially lit, and power consumption can be saved because fewer pixels are lit relative to the entire screen. Meanwhile, in the AOD display mode, since a part of the display screen is maintained to be lit, some information may be displayed at the lit part.

However, in the related art, when the display screen is switched from the AOD display mode to the normal display mode, the pattern afterimage displayed in the AOD mode remains on the screen for a period of time, that is, the short-time afterimage phenomenon of the display screen.

Disclosure of Invention

The disclosure aims to provide a control method and a control device of a display device, a driving chip and the display device, which are used for improving the problem of short-time afterimage generated when the display device is in a screen-off display mode for mode switching.

In order to achieve the above object, the present disclosure provides the following technical solutions:

in one aspect, some embodiments of the present disclosure provide a control method of a display apparatus. The control method comprises the following steps: in a screen-off display mode, writing at least one frame of preset data voltage signals to a plurality of sub-pixels in the display equipment in response to a mode switching instruction, and controlling the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signals, the gray scale corresponding to the at least last frame of preset data voltage signals is larger than or equal to a gray scale threshold value; and after the data voltage signals preset in the last frame are written into the plurality of sub-pixels, controlling the display equipment to switch to a display mode indicated by the mode switching instruction.

In some embodiments, the writing at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device includes: writing a plurality of preset data voltage signals into a plurality of sub-pixels in the display device, wherein the preset data voltage signals of the plurality of frames are identical.

In some embodiments, the writing at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device includes: writing a plurality of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the preset data voltage signals comprise first data voltage signals and second data voltage signals which alternately appear, and the first data voltage signals are different from the second data voltage signals.

In some embodiments, the display device includes a first gate driving circuit for controlling light emission of the subpixels; the sub-pixel comprises a pixel circuit, and the pixel circuit is coupled with the first grid driving circuit; the controlling the plurality of subpixels to emit no light includes: and sending a preset clock signal to the first gate driving circuit, wherein the preset clock signal is used for indicating the first gate driving circuit to output a non-working voltage of a light-emitting control signal to the pixel circuit.

In some embodiments, in the off-screen display mode, the display area of the display device includes a light emitting area and a non-light emitting area; the writing of at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device and controlling the plurality of sub-pixels not to emit light comprises: writing at least one frame of preset data voltage signal into all the sub-pixels positioned in the non-light-emitting area, and controlling all the sub-pixels positioned in the non-light-emitting area not to emit light; or writing at least one frame of preset data voltage signal to all the sub-pixels in the light-emitting area and the non-light-emitting area at the same time, and controlling all the sub-pixels in the light-emitting area and the non-light-emitting area not to emit light.

In some embodiments, the number of frames of the preset data voltage signals written to the plurality of sub-pixels in the display device is N, 1.ltoreq.N.ltoreq.15, and N is a positive integer.

In some embodiments, the gray-scale threshold value is in the range of G48-G255; and/or the gray level threshold is greater than or equal to the display gray level of the display device in the screen-extinguishing display mode.

In still another aspect, there is provided a control apparatus of a display device, including: a receiving control unit configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction in a screen-off display mode, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value; and the switching unit is configured to control the display device to switch to the display mode indicated by the mode switching instruction after writing the data voltage signal preset in the last frame into the plurality of sub-pixels.

In some embodiments, the reception control unit includes a first control unit; the first control unit is configured to write a plurality of frames of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the frames of preset data voltage signals are identical.

In some embodiments, the reception control unit includes a first control unit; the first control unit is configured to write a plurality of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the preset data voltage signals comprise alternately appearing first data voltage signals and second data voltage signals, and the first data voltage signals are different from the second data voltage signals.

In some embodiments, the display device includes a first gate driving circuit for controlling light emission of the subpixels; the sub-pixel comprises a pixel circuit, and the pixel circuit is coupled with the first grid driving circuit; the receiving control unit comprises a second control unit; the second control unit is configured to send a preset clock signal to the first gate driving circuit, wherein the preset clock signal is used for indicating the first gate driving circuit to output a non-working voltage of a light-emitting control signal to the pixel circuit. .

In some embodiments, in the off-screen display mode, the display area of the display device includes a light emitting area and a non-light emitting area; the receiving control unit is configured to write at least one frame of preset data voltage signal to all the sub-pixels positioned in the non-light-emitting area and control all the sub-pixels positioned in the non-light-emitting area not to emit light; or writing at least one frame of preset data voltage signal to all the sub-pixels in the light-emitting area and the non-light-emitting area at the same time, and controlling all the sub-pixels in the light-emitting area and the non-light-emitting area not to emit light.

In yet another aspect, a driver chip is provided. The driving chip includes: the communication interface is configured to receive a mode switching instruction when the display device is in a screen-off display mode; a logic control circuit configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the display gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value; the logic control circuit is further configured to: and after writing data voltage signals preset in the last frame into a plurality of sub-pixels in the display device, controlling the display device to switch to a display mode indicated by the mode switching instruction.

In some embodiments, the display device includes a first gate driving circuit for controlling light emission of the subpixels; the sub-pixel comprises a pixel circuit, and the pixel circuit is coupled with the first grid driving circuit; the logic control circuit comprises a data control sub-circuit and a time sequence control sub-circuit; the data control sub-circuit is configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value; the timing control sub-circuit is configured to transmit a preset clock signal to the first gate driving circuit, the preset clock signal being used for indicating the first gate driving circuit to output a non-operating voltage of a light emission control signal to the pixel circuit.

In still another aspect, a display device is provided, including a display panel, a flexible circuit board, and a driving chip as described in the above embodiments. Wherein the display panel comprises a plurality of sub-pixels; the flexible circuit board is coupled with the display panel; the driving chip is mounted on the flexible circuit board.

In yet another aspect, a display device is provided. The display device includes a display panel including a plurality of sub-pixels including pixel circuits; a first gate driving circuit coupled with the pixel circuit; a source-level control chip configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in a display device and control the plurality of sub-pixels not to emit light based on a response to a mode switching instruction when the display device is in a screen-off display mode; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value; and a timing controller configured to transmit a preset clock signal to the first gate driving circuit in response to a mode switching instruction when the display device is in a screen-off display mode, the preset clock signal being used to instruct the first gate driving circuit to output a non-operating voltage of a light emission control signal to the pixel circuit.

In yet another aspect, a computer-readable storage medium is provided. The computer readable storage medium stores computer program instructions which, when executed by a processor, cause the processor to perform one or more steps in a method of controlling a display device as described above.

In yet another aspect, a computer program product is provided. The computer program product comprises computer program instructions which, when executed on a computer, cause the computer to perform one or more steps of a method of controlling a display device as described in the above embodiments.

In yet another aspect, a computer program is provided. The computer program, when executed on a computer, causes the computer to perform one or more steps in a method of controlling a display device as described in the above embodiments.

The control method and the control device of the display device, the driving chip and the display device have the following beneficial effects:

according to the control method of the display device, after a mode switching instruction is received in the screen-off display mode, at least one frame of preset data voltage signal is written into a plurality of sub-pixels in the display device, and the gray scale corresponding to the data voltage signal preset in the last frame is larger than the gray scale threshold value, so that the plurality of sub-pixels in the display device are in a higher gray scale when the display device enters the indicated display mode for displaying a previous frame of picture, the problem that the recovery time is long when the sub-pixels are switched to the middle gray scale or higher gray scale due to the lower gray scale of the sub-pixels is solved, and the problem of short-time afterimage generated due to hysteresis effect when the display device performs mode switching in the screen-off display mode is further solved; in addition, the plurality of sub-pixels do not emit light at the stage, so that the phenomenon of screen flashing of the display equipment can be avoided, and the display effect of the display equipment is further improved.

The control device, the driving chip, the display device, the computer readable storage medium, the computer program product and the computer program of the display device provided by the present disclosure have the same beneficial effects as those achieved by the control method of the display device provided by the above technical solution, and are not described herein in detail.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art. Furthermore, the drawings in the following description may be regarded as schematic diagrams, not limiting the actual size of the products, the actual flow of the methods, the actual timing of the signals, etc. according to the embodiments of the present disclosure.

FIG. 1A is a block diagram of a display device according to some embodiments of the present disclosure;

FIG. 1B is a block diagram of yet another display device according to some embodiments of the present disclosure;

FIG. 1C is a block diagram of yet another display device according to some embodiments of the present disclosure;

FIG. 1D is a block diagram of yet another display device according to some embodiments of the present disclosure;

FIG. 2 is a block diagram of yet another display device according to some embodiments of the present disclosure;

FIG. 3 is a graph of recovery time measurements for a different gray level to an intermediate gray level in accordance with some embodiments of the present disclosure;

fig. 4 is a flowchart of a control method of a display device according to some embodiments of the present disclosure;

fig. 5 is a timing diagram of different signals of a control method of a display device according to some embodiments of the present disclosure;

fig. 6 is a timing diagram of different signals of a control method of yet another display device according to some embodiments of the present disclosure;

fig. 7 is a block diagram of a control apparatus of a display device according to some embodiments of the present disclosure;

fig. 8 is a block diagram of a driver chip according to some embodiments of the present disclosure.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and its other forms such as the third person referring to the singular form "comprise" and the present word "comprising" are to be construed as open, inclusive meaning, i.e. as "comprising, but not limited to. In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", "some examples", "and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

In describing some embodiments, expressions of "coupled" and "connected" and their derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, the term "coupled" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled (communicatively coupled)" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the disclosure herein.

"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.

As used herein, the term "if" is optionally interpreted to mean "when … …" or "at … …" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if determined … …" or "if detected [ stated condition or event ]" is optionally interpreted to mean "upon determining … …" or "in response to determining … …" or "upon detecting [ stated condition or event ]" or "in response to detecting [ stated condition or event ]" depending on the context.

The use of "configured to" herein is meant to be open and inclusive and does not exclude devices adapted or configured to perform additional tasks or steps.

In addition, the use of "based on" is intended to be open and inclusive in that a process, step, calculation, or other action "based on" one or more of the stated conditions or values may be based on additional conditions or beyond the stated values in practice.

As used herein, "approximately" or "approximately" includes the stated values as well as average values within an acceptable deviation range of the particular values as determined by one of ordinary skill in the art in view of the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system).

Exemplary embodiments are described herein with reference to cross-sectional and/or plan views as idealized exemplary figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Thus, variations from the shape of the drawings due to, for example, manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of example embodiments.

Some embodiments of the present disclosure provide a display device 1000. The type of the display device 1000 is not limited, and may be, for example, an electroluminescent display device or a photoluminescent display device. In the case where the display device 1000 is an electroluminescent display device, the electroluminescent display device may be an Organic Light-Emitting Diode (OLED) or a quantum dot electroluminescent display device (Quantum Dot Light Emitting Diodes, QLED). In the case where the display device is a photoluminescent display device, the photoluminescent display device may be a quantum dot photoluminescent display device.

The display device 1000 is a product having an image (including a still image or a moving image, wherein the moving image may be a video) display function. For example, the display device 1000 may be: any one of a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (Personal Digital Assistant, PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information inquiry apparatus (such as a business inquiry apparatus for e-government, banking, hospital, electric power, etc.), a monitor, and the like.

In some embodiments, referring to fig. 1A and 1B, a display device 1000 includes a display panel 100.

The display panel 100 may be: an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel; a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, QLED) display panel, etc., which is not particularly limited in this disclosure.

In some embodiments, referring to fig. 1A, the display device 1000 further includes a driver chip (Diver Integrated circuit, DIC for short) 101 and a flexible circuit board (Flexible Printed Circuit board, FPC for short) 102.

Among them, a driving chip (DIC) 101 is mounted on a flexible circuit board (FPC) 102.

In some examples, flexible circuit board (FPC) 102 may be flip-chip thin film circuit board 103. The driving chip (DIC) 101 is coupled to the display panel 100 through a flip-chip thin film circuit board 103.

The driving chip (DIC) 101 may be configured to receive display signals including, for example, a power signal, a video image signal, a communication signal (e.g., a signal corresponding to the IIC communication protocol), and a mode control signal (e.g., a mode control signal corresponding to the AOD mode, or a mode control signal corresponding to the normal display mode) through a mobile industry processor interface (Mobile Industry Processor Interface, abbreviated as MIPI interface), etc. Wherein LVDS (Low-Voltage Differential Signaling, low voltage differential Signal) signals. The video image signal may include: image data and timing control signals. The image data includes, for example, light emission data of a plurality of light emitting units. The timing control signals include, for example, a Data Enable signal (Data Enable, which may be abbreviated as DE), a row synchronization signal (Hsync, which may be abbreviated as HS), and a vertical synchronization signal (Vsync, which may be abbreviated as VS). The driving chip (DIC) 101 is connected to the display panel 100 through the flip-chip thin film circuit board 103, thereby achieving driving control of the display panel 100.

In other embodiments, referring to fig. 1B and 1C, the display apparatus 1000 includes a source control chip 110 and a timing controller 130.

With continued reference to fig. 1B, the display device 1000 further includes a main control circuit board (PCB) 104 and a flexible circuit board 102. By way of example, the flexible circuit board 102 may be a flip-chip thin film circuit board 103.

The timing controller 130 may be mounted on a main control circuit board (PCB) 104. A main control circuit board (PCB) 104 may be coupled with the display panel 100 through a flexible circuit board 102 to realize driving of the display panel 100.

In some embodiments, referring to fig. 1C, the display panel 100 includes a plurality of sub-pixels P, and the plurality of sub-pixels P may be arranged in an array.

In some examples, referring to fig. 2, each sub-pixel P includes a pixel circuit 11 and a light emitting device 12. The pixel circuit 11 is coupled with the light emitting device 12.

The structure of the pixel circuit 11 may include various kinds, which are not limited by the present disclosure, for example. For example, the pixel circuit 11 may have a structure of "6T1C", "7T1C", "6T2C", or "7T2C", or the like; where "T" denotes a thin film transistor, a number located before "T" denotes the number of thin film transistors, "C" denotes a storage capacitor, and a number located before "C" denotes the number of storage capacitors. Only one thin film transistor 110 is illustrated in the drawings of some embodiments of the present disclosure.

For example, referring to fig. 2, the light emitting device 12 may include an anode (anode) 121, a light emitting functional layer 122, and a cathode (cathode) 123. The anode 121 is electrically connected to a drain of the thin film transistor 110 serving as a driving transistor among the plurality of thin film transistors 110.

In some examples, the light emitting functional layer 122 may include a light Emitting Layer (EL) for short. In other examples, the light emitting functional layer 122 includes one or more of an electron transport layer (election transporting layer, ETL), an electron injection layer (election injection layer, EIL), a hole transport layer (hole transporting layer, HTL), and a hole injection layer (hole injection layer, HIL) in addition to the light emitting layer. In the case where the display device 1000 is an organic electroluminescent display device, the light-emitting layer is an organic light-emitting layer. In the case where the display device 1000 is a quantum dot electroluminescent display device, the light-emitting layer is a quantum dot light-emitting layer.

In some examples, with continued reference to fig. 1C, the display apparatus 1000 includes a plurality of gate lines 2, a plurality of data lines 3, and a plurality of light emission control lines 4. Each gate line 2 is coupled to a row of sub-pixels P; each light-emitting control line 4 is coupled with a row of sub-pixels P; each data line 3 is coupled to a row of sub-pixels P.

In some embodiments, referring to fig. 1C, the display apparatus 1000 further includes a first gate driving circuit 120.

The timing controller 130 may be configured to receive a display signal through an embedded display port (Embedded DisplayPort: referred to as eDP interface) and the display signal includes, for example, a power signal, a video image signal, a communication signal (for example, a signal corresponding to the IIC communication protocol), and a mode control signal (for example, a mode control signal corresponding to the AOD mode, or a mode control signal corresponding to the normal display mode). Wherein LVDS (Low-Voltage Differential Signaling, low voltage differential Signal) signals. The video image signal may include: image data and timing control signals. The image data includes, for example, light emission data of a plurality of light emitting units. The timing control signals include, for example, a Data Enable signal (Data Enable, which may be abbreviated as DE), a row synchronization signal (Hsync, which may be abbreviated as HS), and a vertical synchronization signal (Vsync, which may be abbreviated as VS).

In some embodiments, the timing controller 130 may be further configured to generate a clock signal in response to the display signal and transmit the generated clock signal to the source control chip 110, the first gate driving circuit 120.

In some examples, referring to fig. 1C, the timing controller 130 may generate the first clock signal CLK1 and the second clock signal CLK2 in response to the display signal.

The source control chip 110 outputs a data signal to the data line 3 under the control of the first clock signal CLK1 generated by the timing controller 130 to charge the sub-pixels P turned on in the column of sub-pixels P controlled by the data line 3.

The first gate driving circuit 120 is coupled to the pixel circuit 11 in the sub-pixel P. The first gate driving circuit 120 outputs a light emission control signal to the light emission control line 4 under the control of the second clock signal CLK2 generated by the timing controller 130 to control the light emission state of the sub-pixel P to which the light emission control line 4 is connected.

In some examples, referring to fig. 1C, the display device 1000 further includes a second gate driving circuit 140.

The timing controller 130 may be further configured to generate the third clock signal CLK3 in response to the display signal. The second gate driving circuit 140 outputs a scan signal to the gate line 2 under the control of the third clock signal CLK3 generated by the timing controller 130 to turn on the thin film transistors 110 in the pixel circuits 11 of one row of the sub-pixels P controlled by the gate line 2.

With the development of electronic technology, the screen can be locally lightened in a screen locking state. This locally lit screen display mode is referred to as a rest screen (Always On Display, AOD) display mode. In the AOD display mode, the display device is only partially lit, and power consumption can be saved since there are few lit pixels, relative to the entire screen.

However, when the display device 1000 is switched from the AOD display mode to the normal display mode, the pattern afterimage displayed in the AOD mode remains on the screen for a period of time, that is, the display effect of the display device 1000 is affected by the display screen AOD short-time afterimage phenomenon.

The inventors of the present disclosure have found that the short-time afterimage phenomenon is mainly caused by hysteresis effect of the pixel circuit, and when a high gray scale region (e.g., G255 gray scale) and a low gray scale region (e.g., G0 gray scale) are simultaneously switched to an intermediate gray scale (e.g., G48 gray scale), there is a difference in brightness between the two regions in a short time, resulting in a visual afterimage phenomenon.

Note that each sub-pixel P in the display device 1000 is driven to emit light by a plurality of Thin Film Transistors (TFTs), and the TFT driving technology can improve display speed, contrast ratio, brightness, and resolution. However, the TFT has hysteresis, which is an uncertainty in the electrical characteristics of the TFT at a certain bias, i.e., the current flowing through the TFT is not only related to the current bias but also to the state in which the TFT was at the previous time. The hysteresis effect of the TFT is related to gate dielectric of the TFT, semiconductor material and interface state traps between the two, and may cause short-term afterimage, and the image of the former frame may remain in the image of the latter frame, thereby affecting the display quality of the display device 1000, and even causing display errors.

The gray scale is to divide the brightness variation between the brightest and darkest brightness that the display device 1000 can display into several parts so as to control the brightness of the display device 1000. Each frame of display screen displayed by the display device 1000 is composed of a combination of colors displayed by a plurality of sub-pixels P. In general, each pixel may exhibit a different color, each color consisting of three primary colors of red, green, and blue. Each pixel includes a plurality of sub-pixels P, for example, each pixel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Each sub-pixel P may exhibit a different brightness level, while the gray scale represents a hierarchical level of different brightness from darkest to brightest. The more levels of different brightness between darkest and brightest, the finer the picture effect that can be presented.

Thus, there is a certain correspondence between the luminance value and the gray scale, so that the gray scale value corresponding to the luminance value can be determined from the luminance value. The display device 1000 displays a white screen (the whitest) at a gray level of 255; the display device 1000 displays a black screen (the darkest color) with a gray level of 0.

Based on this, some embodiments of the present disclosure provide a control method of the display apparatus 1000. Referring to fig. 4, the control method includes steps S10 to S20.

Step S10: in the off-screen display mode, at least one frame of preset Data voltage signal Data is written to a plurality of sub-pixels P in the display device 1000 in response to a mode switching instruction, and the plurality of sub-pixels P are controlled not to emit light.

The mode switching instruction may be internally generated and provided by the display apparatus 1000 under control of other signals, which is not limited herein.

The mode of receiving the mode switching instruction is as follows: may be electrically connected to a device (e.g., a module or a circuit) that provides a display signal, and receives a mode switching instruction through a connection line; or the display signal can be received by a wireless receiver in a wireless signal transmission mode (such as Bluetooth, WIFI and the like); other ways of transmitting signals are possible, and are not limited herein.

In some examples, the gray level corresponding to at least the last frame of the preset data voltage signal is greater than or equal to the gray level threshold.

In some examples, the gray-scale threshold has a value in the range of G48-G255.

For example, referring to fig. 3, the inventors of the present disclosure found that, by means of a large number of short-time afterimage studies and debugging of display devices, the time when the low gray scale region (e.g., G0, G15, G30, etc.) is switched to the intermediate gray scale (e.g., G48 gray scale) is longer than the time when the high gray scale region (e.g., G110, G220, G255) is switched to the intermediate gray scale (e.g., g., G48 gray scale). That is, the recovery time is long when the low gray level position in the AOD mode picture is switched to the normal display picture, and the light emitting position in the AOD mode picture is switched to the normal display picture, thereby causing a visual afterimage phenomenon.

In some examples, the gray level threshold is greater than or equal to a display gray level of the display device 1000 in the off-screen display mode.

In the off-screen display mode, the gray scale corresponding to the area where the display device 1000 is turned on is relatively high, and when a preset data voltage is input to the sub-pixel P in the area where the display device 1000 is turned on, the gray scale corresponding to the preset data voltage signal may be greater than or equal to the original display gray scale of the sub-pixel P. For example, if the display gray level of one subpixel P in the illuminated region of the display device 1000 is G56 in the off-screen display mode, the gray level corresponding to the preset data voltage signal input to the subpixel P may be G56, G60, G70, or the like.

Step S20: after writing the Data voltage signal Data preset in the last frame into the plurality of sub-pixels P, the display apparatus 1000 is controlled to switch to the display mode indicated by the mode switching instruction.

The display mode indicated by the mode switching instruction may be a normal display mode or a highlight mode (High Brightness mode, HBM) for improving screen readability outdoors or under strong light.

According to the control method of the display device 1000 provided by the disclosure, after a mode switching instruction is received in a screen-off display mode, at least one frame of preset Data voltage signal Data is written into a plurality of sub-pixels P in the display device 1000, and the gray scale corresponding to at least the last frame of preset Data voltage signal Data is larger than a gray scale threshold value, so that the plurality of sub-pixels P in the display device 1000 are in a higher gray scale when the display device 1000 enters a previous frame of picture display in the indicated display mode, the recovery time of the plurality of sub-pixels P when being switched to an intermediate gray scale is shortened, the problem that the recovery time of a low gray scale area (such as G0 gray scale) is longer when being switched to the intermediate gray scale (such as G48 gray scale) or the gray scale is changed is solved, and the problem of a short-time afterimage generated due to hysteresis effect when the display device 1000 is switched in the screen-off display mode is solved; moreover, the plurality of sub-pixels P do not emit light at this stage, so that the display device 1000 can be prevented from having a screen-flashing phenomenon, and the display effect of the display device 1000 can be further improved.

In some embodiments, referring to fig. 5, in response to a mode switching instruction in a display mode of the display device 1000, writing at least one frame of preset data voltage signals to a plurality of sub-pixels P in the display device 1000 includes: a plurality of preset Data voltage signals Data are written to a plurality of sub-pixels P in the display apparatus 1000, and the plurality of preset Data voltage signals Data are identical.

It should be noted that, by adjusting the value of the Data voltage signal Data, the magnitude of the driving current may be controlled, and thus the display brightness of the display device 1000 may be adjusted. For example, the higher the Data voltage signal Data value, the smaller the driving current, and the lower the light emission luminance of the corresponding light emitting device 12 in one light emission stage, the lower the display luminance of the display apparatus 1000. Conversely, the higher the display brightness of the display device 1000.

That is, the display device 1000 has a certain correspondence relationship between the display gray levels and the Data voltage signal Data, and each gray level corresponds to a different Data voltage. The voltage value of the Data voltage signal Data transmitted by the Data signal terminal decreases with the increase of the brightness value.

With continued reference to fig. 5, in response to the mode switching command in the off-screen display mode, the display device 1000 writes at least one frame of preset Data voltage signal Data to the plurality of sub-pixels P in the display device 1000 with a lower value, where the lower voltage value may enable the plurality of sub-pixels P to have a higher gray level.

In this embodiment, by writing a plurality of preset Data voltage signals Data into a plurality of sub-pixels P in the display device 1000, and the plurality of preset Data voltage signals Data are the same, so that the gray scales of the plurality of sub-pixels P are the same, the gray scales are larger than a gray scale threshold value, so that the plurality of sub-pixels P in the display device 1000 are all in a higher gray scale value, the problem of longer recovery time when a low gray scale region (for example: G0 gray scale) is switched to an intermediate gray scale (for example: G48 gray scale) is solved, and the problem of short-time afterimage generated due to hysteresis effect when the display device 1000 performs mode switching in a screen-off display mode is further solved; moreover, the plurality of sub-pixels P do not emit light at this stage, so that the display device 1000 can be prevented from having a screen-flashing phenomenon, and the display effect of the display device 1000 can be further improved.

In some embodiments, referring to fig. 6, in response to a mode switching instruction in a display mode of the display device 1000, writing at least one frame of preset data voltage signals to a plurality of sub-pixels P in the display device 1000 includes: a plurality of preset Data voltage signals Data including first Data voltage signals and second Data voltage signals alternately appearing are written to a plurality of sub-pixels P in the display device 1000, the first Data voltage signals being different from the second Data voltage signals.

In this embodiment, by writing the first Data voltage signal and the second Data voltage signal preset in multiple frames and appearing alternately into the multiple sub-pixels P in the display device 1000, and the gray scale corresponding to the Data voltage signal Data preset in the last frame is greater than the gray scale threshold, when the display device 1000 switches from the off-screen display mode to the display mode indicated by the mode switching instruction, when the previous frame of picture display in the indicated display mode is entered, the multiple sub-pixels P in the display device 1000 are all at a higher gray scale value, so that the problem of longer recovery time when the low gray scale region (for example: G0 gray scale) is switched to the middle gray scale (for example: G48 gray scale) is solved, and the problem of short-time afterimage generated due to hysteresis effect when the display device 1000 switches from the off-screen display mode is further solved; also, the plurality of sub-pixels P do not emit light at this stage, further improving the display effect of the display device 1000.

In some embodiments, controlling the plurality of subpixels P to not emit light includes: a preset clock signal is sent to the first gate driving circuit 120, where the preset clock signal is used to instruct the first gate driving circuit 120 to output a non-operating voltage of the light emission control signal to the pixel circuit 11.

It will be appreciated that, during the normal display of the display device 1000, in the light emitting stage of the sub-pixel P, the first gate driving circuit 120 outputs the operating voltage of the light emitting control signal to the light emitting control line 4 under the control of the clock signal, so as to control the sub-pixel P connected to the light emitting control line 4 to emit light. The above-mentioned non-operation voltage means that, in the light emitting stage of the sub-pixel P, the first gate driving circuit 120 outputs the light emitting control signal to the light emitting control line 4 under the control of the clock signal, so that the sub-pixel P connected to the light emitting control line 4 does not emit light.

In this embodiment, by sending a preset clock signal to the first gate driving circuit 120, the first gate driving circuit 120 is instructed to output the non-working voltage of the light emission control signal to the pixel circuit 11, so that the plurality of sub-pixels P do not emit light, which can avoid the display device 1000 from generating a screen flashing phenomenon, and further improve the display effect of the display device 1000.

In some embodiments, referring to fig. 1D, in the idle screen display mode, the display area AA of the display device includes a light emitting area A1 and a non-light emitting area A2.

Wherein the light emitting area A1 is used for displaying preset information. For example, the light emitting area A1 may display time information, notification information, and the like in the screen-off display mode.

In the off-screen display mode, the non-light-emitting area A2 is in a black screen state, i.e., pixels in the non-light-emitting area A2 do not emit light.

In some examples, the step S10 includes: writing at least one frame of preset data voltage signals to all the sub-pixels P in the non-light-emitting area A2, and controlling all the sub-pixels P in the non-light-emitting area A2 not to emit light.

In the idle display mode, the non-light emitting area A2 is in a black screen state, that is, the gray scale of the sub-pixel P in the non-light emitting area A2 is lower, and when the display device 1000 switches from the idle display mode to the normal display mode or the highlight mode in response to the mode switching instruction, the recovery time is longer when the sub-pixel P in the non-light emitting area A2 switches from the low gray scale to the middle gray scale or the high gray scale.

In this embodiment, by enabling the display device 1000 to respond to the mode switching instruction, writing at least one frame of preset data voltage signal into all the sub-pixels P in the non-light-emitting area A2, where the gray level corresponding to the data voltage signal preset in the last frame is greater than the gray level threshold, when the display device 1000 displays the previous frame of picture when entering the indicated display mode, the sub-pixels P in the display device 1000 are all in a higher gray level, so that the problem that the recovery time is longer when switching to the higher gray level required by the normal display state due to the lower gray level of the sub-pixels in the non-light-emitting area A2 is solved, and the problem of short-time afterimage generated due to hysteresis effect when the display device 1000 switches modes in the inactive display mode is further improved; moreover, the plurality of sub-pixels P do not emit light at this stage, and are in a black screen state, but the light emitting area A1 can still be used for displaying preset information, so that the display effect of the display device 1000 is improved, and further, the user experience is improved.

In other examples, the step S10 includes: at least one frame of preset data voltage signals is written to all the sub-pixels P located in the light emitting area A1 and the non-light emitting area A2 at the same time, and all the sub-pixels P located in the light emitting area A1 and the non-light emitting area A2 are controlled not to emit light.

In this embodiment, by enabling the display device 1000 to respond to the mode switching instruction, writing at least one frame of preset data voltage signal into all the sub-pixels P in the light-emitting area A1 and the non-light-emitting area A2, wherein the gray scale corresponding to the data voltage signal preset in the last frame is larger than the gray scale threshold, when the display device 1000 displays the previous frame of picture when entering the indicated display mode, all the sub-pixels P in the display area AA of the display device 1000 are in a higher gray scale, so that the problem that the recovery time is longer when switching to the higher gray scale required by the normal display state due to the lower gray scale of the sub-pixels in the non-light-emitting area A2 is solved, and the problem of short-time afterimage generated due to hysteresis effect when the display device 1000 performs mode switching in the idle screen display mode is further improved; moreover, the light-emitting area A1 and the non-light-emitting area A2 do not emit light at this stage, and the whole display device is in a black screen state, so that the phenomenon of screen flashing of the display device 1000 can be avoided, and the display effect of the display device 1000 is further improved.

In some embodiments, the number of frames of the preset data voltage signals written to the plurality of sub-pixels P in the display apparatus 1000 is N, 1.ltoreq.N.ltoreq.15, and N is a positive integer. For example, the number of frames of the preset data voltage signal may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.

In this embodiment, by writing 1 frame to 15 frames of data voltage signals to a plurality of sub-pixels P in the display device 1000 in response to a mode switching instruction by the display device 1000, the plurality of sub-pixels P in the display device 1000 can be all in a higher gray scale, so that the problem of longer recovery time when switching from a low gray scale region to a middle gray scale is solved, and the problem of short-time afterimage caused by hysteresis effect when the display device 1000 performs mode switching in a screen-off display mode is further solved; in addition, in this stage, the voltage signals of 1 frame to 15 frames of data are written, so that the time is relatively short, the display device 1000 can be quickly switched from the display mode of the screen-extinguishing display to the display mode indicated by the mode switching instruction, the power consumption of the display device 1000 is reduced, and the user experience can be improved.

In summary, in the control method of the display device 1000 provided by the present disclosure, after receiving the mode switching instruction in the idle display mode, by writing at least one frame of preset Data voltage signal Data into a plurality of sub-pixels P in the display device 1000, and the gray scale corresponding to at least the last frame of preset Data voltage signal Data is greater than the gray scale threshold, when the display device 1000 displays the previous frame of picture when entering the indicated display mode, the plurality of sub-pixels P in the display device 1000 are all in a higher gray scale, so that the problem of longer recovery time when the low gray scale region (e.g., G0 gray scale) is switched to the middle gray scale (e.g., G48 gray scale) is improved, and the problem of short-term afterimage generated due to hysteresis effect when the display device 1000 performs mode switching in the idle display mode is further improved.

The foregoing description of the embodiments of the present disclosure has been presented primarily in terms of methods. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

Some embodiments of the present disclosure provide a control apparatus 200 of a display device 1000. The control apparatus 200 of the display device 1000 is configured to perform the control method of the display device 1000 described above.

Referring to fig. 7, the control apparatus 200 of the display device 1000 includes a reception control unit 210 and a switching unit 220.

The receiving control unit 210 is configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels P in the display device 1000 in response to a mode switching instruction in a screen-off display mode, and control the plurality of sub-pixels not to emit light.

And the gray scale corresponding to the data voltage signal preset in at least the last frame is larger than the gray scale threshold value in the at least one frame of preset data voltage signal.

And a switching unit 220 configured to control the display device 1000 to switch to the display mode indicated by the mode switching instruction after writing the data voltage signal preset for the last frame to the plurality of sub-pixels P.

The control device 200 provided in the present disclosure is configured to execute the control method of the display apparatus 1000, after receiving a mode switching instruction in a screen-off display mode, write at least one frame of preset Data voltage signal Data into a plurality of sub-pixels P in the display apparatus 1000, where a gray level corresponding to at least a last frame of preset Data voltage signal Data is greater than a gray level threshold, so that when the display apparatus 1000 displays a previous frame of picture when entering the indicated display mode, the plurality of sub-pixels P in the display apparatus 1000 are all in a higher gray level, thereby improving a problem of longer recovery time when a low gray level region (e.g., G0 gray level) is switched to an intermediate gray level (e.g., G48 gray level), and further improving a short-time afterimage problem generated due to a hysteresis effect when the display apparatus 1000 performs mode switching in the screen-off display mode; moreover, the plurality of sub-pixels P do not emit light at this stage, so that the display device 1000 can be prevented from having a screen-flashing phenomenon, and the display effect of the display device 1000 can be further improved.

In some embodiments, the reception control unit 210 includes a first control unit 211.

The first control unit 211 is configured to write a plurality of preset data voltage signals to a plurality of sub-pixels in the display device 1000, the preset data voltage signals being the same.

In some embodiments, the first control unit 211 is configured to write a plurality of preset Data voltage signals Data to a plurality of sub-pixels P in the display device 1000, the plurality of preset Data voltage signals Data including first Data voltage signals and second Data voltage signals that alternately occur, the first Data voltage signals being different from the second Data voltage signals.

In some embodiments, the reception control unit 210 includes a second control unit 212.

The second control unit 212 is configured to send a preset clock signal to the first gate driving circuit 120, where the preset clock signal is used to instruct the first gate driving circuit 120 to output a non-operating voltage of the light emission control signal to the pixel circuit 11.

In some embodiments, the reception control unit 210 is configured to write at least one frame of preset data voltage signals to all the sub-pixels P of the non-light emitting area A2, and control not to emit light of all the sub-pixels P located in the non-light emitting area A2.

In some embodiments, the reception control unit 210 is configured to simultaneously write at least one frame of preset data voltage signals to all the sub-pixels P located in the light emitting area A1 and the non-light emitting area A2, and to control not to emit light for all the sub-pixels P located in the light emitting area A1 and the non-light emitting area A2.

In this embodiment, by enabling the display device 1000 to respond to the mode switching instruction, writing at least one frame of preset data voltage signal into all the sub-pixels P located in the light-emitting area A1 and the non-light-emitting area A2, and enabling the gray scale corresponding to the data voltage signal preset in the last frame to be larger than the gray scale threshold, when the display device 1000 displays the previous frame of picture when entering the indicated display mode, the sub-pixels P in the display device 1000 are all in a higher gray scale, so that the problem that the recovery time is longer when switching to the higher gray scale required by the normal display state due to the lower gray scale of the sub-pixels in the non-light-emitting area A2 is solved, and the problem of short-time afterimage generated due to the hysteresis effect when the display device 1000 performs mode switching in the idle screen display mode is further improved; moreover, the light-emitting area A1 and the non-light-emitting area A2 do not emit light at this stage, and the whole display device is in a black screen state, so that the phenomenon of screen flashing of the display device 1000 can be avoided, and the display effect of the display device 1000 is further improved.

Some embodiments of the present disclosure provide a driving chip 300. The driving chip 300 is configured to drive the above-described display device 1000 to emit light.

Referring to fig. 8, the driving chip 300 includes a communication interface 310 and a logic control circuit 320.

The communication interface 310 is configured to receive a mode switching instruction when the display device 1000 is in the off-screen display mode.

The logic control circuit 320 is configured to write at least one frame of preset data voltage signals to the plurality of sub-pixels P in the display device 1000 in response to the mode switching instruction, and control the plurality of sub-pixels to emit no light P.

And the display gray scale corresponding to at least the last preset data voltage signal in the at least one preset data voltage signal is larger than a gray scale threshold.

In some examples, logic control circuit 320 is further configured to: after writing the data voltage signal preset for the last frame to the plurality of sub-pixels in the display device 1000, the display device 1000 is controlled to switch to the display mode indicated by the mode switching instruction.

In this embodiment, the communication interface 310 is configured to receive a mode switching instruction, where the logic control circuit 320 writes at least one frame of preset data voltage signal to a plurality of sub-pixels P in the display device 1000 in response to the mode switching instruction, and a gray level corresponding to a last frame of preset data voltage signal is greater than a gray level threshold, so that when the display device 1000 displays a previous frame of picture when entering the indicated display mode, the plurality of sub-pixels P in the display device 1000 are all at a higher gray level, which improves a problem that a recovery time is longer when switching to a higher gray level required by a normal display state due to a lower gray level of a sub-pixel in the non-light emitting area A2, and further improves a short-time afterimage problem generated due to a hysteresis effect when the display device 1000 performs mode switching in a rest display mode; moreover, the light-emitting area A1 and the non-light-emitting area A2 do not emit light at this stage, and the whole display device is in a black screen state, so that the phenomenon of screen flashing of the display device 1000 can be avoided, and the display effect of the display device 1000 is further improved.

In some embodiments, with continued reference to fig. 8, the logic control circuit 320 includes a data control sub-circuit 321 and a timing control sub-circuit 322.

The data control sub-circuit 321 is configured to write at least one frame of preset data voltage signal to the plurality of sub-pixels P in the display device 1000 in response to a mode switching instruction, and control the plurality of sub-pixels not to emit light.

A timing control sub-circuit 322 configured to transmit a preset clock signal to the first gate driving circuit 120, the preset clock signal being used to instruct the first gate driving circuit 120 to output a non-operating voltage of a light emission control signal to the pixel circuit 11.

In this embodiment, the data control sub-circuit 321 writes at least one frame of preset data voltage signal into a plurality of sub-pixels P in the display device 1000 in response to the mode switching instruction, and the timing control sub-circuit 322 sends a preset clock signal to the first gate driving circuit 120 to instruct the first gate driving circuit 120 to output a non-working voltage of the light emission control signal to the pixel circuit 11, so that the plurality of sub-pixels P do not emit light, which can avoid the occurrence of a flash phenomenon of the display device 1000, and further improve the display effect of the display device 1000.

Some embodiments of the present disclosure provide for the display device 1000 to include a driver chip that is the driver chip 300 described above. Referring to fig. 1A, a driving chip 300 is coupled to a display panel 100 through a flexible circuit board (FPC) 102.

When the display device 1000 is in the off-screen display state, the driving chip 300 may receive a mode switching instruction through the MIPI interface and write at least one frame of preset data voltage signal into the plurality of sub-pixels P in the display device 1000 in response to the mode switching instruction, where a gray level corresponding to at least the last frame of preset data voltage signal is greater than a gray level threshold.

Therefore, when the display device 1000 displays the previous frame of picture when entering the display mode indicated by the mode switching instruction, the plurality of sub-pixels P in the display device 1000 are all in a higher gray level, the recovery time when the plurality of sub-pixels P are switched to the middle gray level is shortened, the problem that the recovery time is longer when the low gray level area (for example, G0 gray level) is switched to the middle gray level (for example, G48 gray level) is improved, and the short-time afterimage problem generated by hysteresis effect when the display device 1000 switches the mode in the screen-off display mode is further improved; moreover, the plurality of sub-pixels P do not emit light at this stage, so that the display device 1000 can be prevented from having a screen-flashing phenomenon, and the display effect of the display device 1000 can be further improved.

In other embodiments, referring to fig. 1B and 1C, the display device 1000 includes a plurality of sub-pixels P, a source control chip 110, a timing controller 130, and a first gate driving circuit 120.

The timing controller 130 may receive the mode switching instruction through the eDP port and control the source control chip 110 to write at least one frame of preset data voltage signal into the plurality of sub-pixels P in response to the mode switching instruction, where a gray level corresponding to at least a last frame of preset data voltage signal is greater than a gray level threshold; meanwhile, the timing controller 130 transmits a preset clock signal to the first gate driving circuit 120 in response to the mode switching instruction, instructs the first gate driving circuit 120 to output the non-operating voltage of the light emission control signal to the plurality of sub-pixels P, and makes the plurality of sub-pixels P not emit light.

Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) having stored therein computer program instructions that, when run on a computer (e.g., a display device), cause the computer to perform one or more steps in a method of controlling a display device as described in any of the above embodiments.

By way of example, the computer-readable storage media described above can include, but are not limited to: magnetic storage devices (e.g., hard Disk, floppy Disk or magnetic strips, etc.), optical disks (e.g., CD (Compact Disk), DVD (Digital Versatile Disk ), etc.), smart cards, and flash Memory devices (e.g., EPROM (Erasable Programmable Read-Only Memory), card, stick, key drive, etc.). Various computer-readable storage media described in this disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

Some embodiments of the present disclosure also provide a computer program product, for example, stored on a non-transitory computer readable storage medium. The computer program product comprises computer program instructions which, when executed on a computer (e.g. a display device), cause the computer to perform one or more steps of a method of controlling a display device as described in the above embodiments.

Some embodiments of the present disclosure also provide a computer program. The computer program, when executed on a computer (e.g. a display device), causes the computer to perform one or more steps of the method of controlling a display device as described in the above embodiments.

The beneficial effects of the computer readable storage medium, the computer program product and the computer program are the same as those of the control method of the display device described in some embodiments, and are not described herein.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art who is skilled in the art will recognize that changes or substitutions are within the technical scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A control method of a display device, characterized by comprising:

in a screen-off display mode, writing at least one frame of preset data voltage signals to a plurality of sub-pixels in the display equipment in response to a mode switching instruction, and controlling the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signals, the gray scale corresponding to the at least last frame of preset data voltage signals is larger than or equal to a gray scale threshold value;

and after the data voltage signals preset in the last frame are written into the plurality of sub-pixels, controlling the display equipment to switch to a display mode indicated by the mode switching instruction.

2. The control method according to claim 1, wherein,

the writing of at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device includes:

writing a plurality of preset data voltage signals into a plurality of sub-pixels in the display device, wherein the preset data voltage signals of the plurality of frames are identical.

3. The control method according to claim 1, wherein,

Writing a plurality of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the preset data voltage signals comprise first data voltage signals and second data voltage signals which alternately appear, and the first data voltage signals are different from the second data voltage signals.

4. A control method according to any one of claims 1 to 3, characterized in that

The display device includes a first gate driving circuit for controlling light emission of a subpixel; the sub-pixel comprises a pixel circuit, and the pixel circuit is coupled with the first grid driving circuit;

the controlling the plurality of subpixels to emit no light includes:

and sending a preset clock signal to the first gate driving circuit, wherein the preset clock signal is used for indicating the first gate driving circuit to output a non-working voltage of a light-emitting control signal to the pixel circuit.

5. A control method according to any one of claim 1 to 3,

in the screen-off display mode, a display area of the display device comprises a light-emitting area and a non-light-emitting area;

the writing of at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device and controlling the plurality of sub-pixels not to emit light comprises:

Writing at least one frame of preset data voltage signal into all the sub-pixels positioned in the non-light-emitting area, and controlling all the sub-pixels positioned in the non-light-emitting area not to emit light; or,

and simultaneously writing at least one frame of preset data voltage signal into all the sub-pixels positioned in the light-emitting area and the non-light-emitting area, and controlling all the sub-pixels positioned in the light-emitting area and the non-light-emitting area not to emit light.

6. A control method according to any one of claim 1 to 3,

the number of frames of the preset data voltage signals written into a plurality of sub-pixels in the display device is N, N is more than or equal to 1 and less than or equal to 15, and N is a positive integer.

7. A control method according to any one of claim 1 to 3,

the value range of the gray level threshold is G48-G255; and/or the number of the groups of groups,

the gray level threshold is larger than or equal to the display gray level of the display device in the screen-extinguishing display mode.

8. A control apparatus of a display device, comprising:

a receiving control unit configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction in a screen-off display mode, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value;

And the switching unit is configured to control the display device to switch to the display mode indicated by the mode switching instruction after writing the data voltage signal preset in the last frame into the plurality of sub-pixels.

9. The control device according to claim 8, wherein,

the receiving control unit comprises a first control unit;

the first control unit is configured to write a plurality of frames of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the frames of preset data voltage signals are identical.

10. The control device according to claim 8, wherein,

the receiving control unit comprises a first control unit;

the first control unit is configured to write a plurality of preset data voltage signals to a plurality of sub-pixels in the display device, wherein the preset data voltage signals comprise alternately appearing first data voltage signals and second data voltage signals, and the first data voltage signals are different from the second data voltage signals.

11. The control device according to any one of claims 8 to 10, characterized in that,

The receiving control unit comprises a second control unit;

the second control unit is configured to send a preset clock signal to the first gate driving circuit, wherein the preset clock signal is used for indicating the first gate driving circuit to output a non-working voltage of a light-emitting control signal to the pixel circuit.

12. The control device according to any one of claims 8 to 10, characterized in that,

the receiving control unit is configured to write at least one frame of preset data voltage signal to all the sub-pixels positioned in the non-light-emitting area and control all the sub-pixels positioned in the non-light-emitting area not to emit light; or,

13. A driver chip, comprising:

the communication interface is configured to receive a mode switching instruction when the display device is in a screen-off display mode;

A logic control circuit configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the display gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value;

the logic control circuit is further configured to: and after writing data voltage signals preset in the last frame into a plurality of sub-pixels in the display device, controlling the display device to switch to a display mode indicated by the mode switching instruction.

14. The driver chip of claim 13, wherein the display device includes a first gate driving circuit for controlling the emission of the subpixels; the sub-pixel comprises a pixel circuit, and the pixel circuit is coupled with the first grid driving circuit;

the logic control circuit comprises a data control sub-circuit and a time sequence control sub-circuit;

the data control sub-circuit is configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in the display device in response to a mode switching instruction, and control the plurality of sub-pixels not to emit light; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value;

The timing control sub-circuit is configured to transmit a preset clock signal to the first gate driving circuit, the preset clock signal being used for indicating the first gate driving circuit to output a non-operating voltage of a light emission control signal to the pixel circuit.

15. A display device, characterized by comprising:

a display panel including a plurality of sub-pixels;

a flexible circuit board coupled with the display panel; the method comprises the steps of,

the drive chip of claim 13 or 14, mounted on the flexible circuit board.

16. A display device, characterized by comprising:

a display panel including a plurality of sub-pixels including pixel circuits;

a first gate driving circuit coupled with the pixel circuit;

a source-level control chip configured to write at least one frame of preset data voltage signals to a plurality of sub-pixels in a display device and control the plurality of sub-pixels not to emit light based on a response to a mode switching instruction when the display device is in a screen-off display mode; wherein, in the at least one frame of preset data voltage signal, the gray scale corresponding to the at least last frame of preset data voltage signal is larger than a gray scale threshold value;

And a timing controller configured to transmit a preset clock signal to the first gate driving circuit in response to a mode switching instruction when the display device is in a screen-off display mode, the preset clock signal being used to instruct the first gate driving circuit to output a non-operating voltage of a light emission control signal to the pixel circuit.

17. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer program instructions, which, when run by a processor, cause the processor to perform one or more steps of the control method of a display device according to any one of claims 1 to 7.