CN113643648A

CN113643648A - Correction method, device and system for LED lamp panel

Info

Publication number: CN113643648A
Application number: CN202010340190.7A
Authority: CN
Inventors: 杨城; 来浩坤; 殷雷; 刘宝华; 樊兴旺
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-11-12

Abstract

The embodiment of the invention relates to a method, a device and a system for correcting an LED lamp panel, wherein a COB type LED module is used as an LED lamp panel of a light-emitting unit, a specific lighting control mode is adopted, namely LEDs with the same color of LED pixels of the COB type LED modules at the same pixel position in N multiplied by M pixel positions are controlled to be lighted each time to display one of a plurality of corrected images, and a plurality of LED pixels of each COB type LED template at the N multiplied by M pixel positions are controlled to be lighted in sequence to display the plurality of corrected images; therefore, as the distance between the pixel points of the LED lamp panel is smaller and smaller, the LED lamp panel still can obtain a more accurate point positioning result, and further the correction efficiency can be improved.

Description

Correction method, device and system for LED lamp panel

Technical Field

The invention relates to the technical field of display correction, in particular to a correction method of an LED lamp panel, a correction device of the LED lamp panel and a correction system of the LED lamp panel.

Background

With the rapid development of the LED industry, the LED display screen is widely applied to various occasions of daily life as a flat panel display device. The wide application and rapid development of the LED display screen are inseparable from the advantages of the LED display screen, which include: the LED display screen has the advantages of high brightness, low working voltage, low power consumption, free assembly, large screen, long service life, low failure rate, impact resistance, stable performance, high visibility, easy matching with an integrated circuit and the like. The LED display screen is based on the semiconductor technology which is developed vigorously for decades, has a series of advantages of adjustable brightness range, safety, environmental protection, energy conservation, bright color, large visual range, clear content and the like, is easy to update, low in cost and good in timeliness compared with other traditional information display media, simultaneously, bright and smooth colored moving pictures attract the eyes of people more easily, and has incomparable advantages compared with other media in the information display and transmission. At present, LED display screens are developing towards higher brightness, higher weatherability and higher light emitting density, and meanwhile, the requirements of people on the display quality are becoming stricter.

At present, LED display screens are developing toward small and even micro pitches, manufacturers have proposed P1.5 and below micro pitch LED display screens, and accordingly a Chip-On-Board (COB) type LED module is also proposed as a light emitting unit On each LED lamp panel in the LED display screens, and the COB type LED module as a light emitting unit typically packages multiple groups of RGB-LED chips into a single module and then is soldered to a circuit Board of the LED lamp panel. Because the distance between the points on the LED lamp panel is small, the LED lamp points in the same-color LED lamp point full-brightness correction image collected when the color correction such as brightness correction or brightness correction is carried out on the LED lamp panel are dense, the point positioning difficulty in the subsequent image processing process is increased, the point positioning is inaccurate when the image processing is serious, and the correction efficiency is influenced.

Disclosure of Invention

In order to overcome the defects and shortcomings in the related art, the embodiments of the present invention provide a method, a device and a system for correcting an LED lamp panel.

On one hand, the LED lamp panel provided by the embodiment of the present invention includes a circuit board and a plurality of chip-on-board (COB) LED modules soldered on the circuit board, where each of the chip-on-board LED modules includes N × M LED pixels that are independently controlled and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the N × M LED pixels respectively correspond to N × M pixel positions, and each of the LED pixels includes a plurality of LEDs with different colors; the correction method comprises the following steps: a) controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images; b) controlling an image acquisition device to acquire the plurality of corrected images to obtain respective color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance and chrominance information; and c) generating pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules for color correction by the LED lamp panel according to the color information of each of the N × M LED pixels of each of the plurality of chip-on-board LED modules and a set color target value.

In the correction method of the present embodiment, a specific lighting control manner is adopted for an LED lamp panel using COB type LED modules as light emitting units, that is, LEDs of the same color of the LED pixels of the plurality of chip-on-board LED modules located at the same pixel position of the N × M pixel positions are controlled to be lit each time to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates are sequentially controlled to be lit to display the plurality of correction images; therefore, as the distance between the pixel points of the LED lamp panel is smaller and smaller, a more accurate point positioning result can be obtained, and the correction efficiency can be improved.

In one embodiment of the present invention, the plurality of different color LEDs in each of the LED pixels includes a red LED, a green LED, and a blue LED; the controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner includes: controlling the plurality of chip-on-board LED modules to display N × M red corrected images in the target lighting manner; controlling the plurality of chip-on-board LED modules to display N × M green corrected images in the target lighting manner; and controlling the plurality of chip-on-board LED modules to display N × M blue-corrected images in the target lighting manner.

In an embodiment of the present invention, the value of N is 2, the value of M is 2, and accordingly each of the chip-on-board LED modules is a four-in-one LED module.

In one embodiment of the present invention, the controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner includes: sending an image display signal to the LED lamp panel through a display controller and a scanning card which are sequentially connected so as to control the plurality of chip-on-board LED modules to display a plurality of correction images in the target lighting mode, wherein the scanning card is electrically connected between the display controller and the LED lamp panel, and the scanning card is connected with the display controller through an Ethernet interface (such as an Ethernet electric port or an optical port).

In one embodiment of the present invention, the correction method further comprises: storing the pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules to a non-volatile memory of the LED lamp panel and/or to a database.

On the other hand, the correction device for the LED lamp panel provided by the embodiment of the present invention is characterized in that the LED lamp panel includes a circuit board and a plurality of chip-on-board LED modules soldered on the circuit board, each of the chip-on-board LED modules includes N × M LED pixels that are independently controlled and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the N × M LED pixels respectively correspond to N × M pixel positions, and each of the LED pixels includes a plurality of LEDs with different colors; the correction device includes: i) a display control module for controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images; ii) an acquisition control module for controlling an image acquisition device to acquire the plurality of corrected images to obtain respective color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance-chrominance information; and iii) a coefficient generation module for generating pixel-by-pixel color correction coefficients for each of the plurality of chip-on-board LED modules for color correction by the LED lamp panel, based on the color information and a set color target value for each of the N × M LED pixels of each of the plurality of chip-on-board LED modules.

The correction apparatus of this embodiment employs a specific lighting control manner for an LED lamp panel using COB type LED modules as light emitting units, that is, each time the same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules are controlled to be lit to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates are sequentially controlled to be lit to display the plurality of correction images; therefore, as the distance between the pixel points of the LED lamp panel is smaller and smaller, a more accurate point positioning result can be obtained, and the correction efficiency can be improved.

In one embodiment of the present invention, the plurality of different color LEDs in each of the LED pixels includes a red LED, a green LED, and a blue LED; the display control module is specifically configured to: controlling the plurality of chip-on-board LED modules to display N × M red corrected images in the target lighting manner; controlling the plurality of chip-on-board LED modules to display N × M green corrected images in the target lighting manner; and controlling the plurality of chip-on-board LED modules to display N × M blue-corrected images in the target lighting manner.

In an embodiment of the present invention, the display control module is specifically configured to: through the display controller and the scanning card that connect gradually to the LED lamp plate sends the image display signal in order to control a plurality of chip type LED modules on the board with the mode shows a plurality of correction images are lighted to the target, wherein the scanning card electric connection be in the display controller with between the LED lamp plate, just the scanning card with through ethernet interface connection between the display controller.

In one embodiment of the present invention, the correction device further includes: a coefficient storage module for storing the pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules to a non-volatile memory of the LED lamp panel and/or to a database.

In another aspect, an embodiment of the present invention provides a correction system for an LED lamp panel, including: the upper computer is provided with correction software; a display controller; the scanning card is electrically connected with the upper computer through the display controller and is used for electrically connecting the LED lamp panel to be corrected; the image acquisition equipment is electrically connected with the upper computer; the upper computer is used for executing the correction method in any one of the embodiments.

In summary, the above technical solutions of the embodiments of the present invention have the following beneficial effects: the correction method, the correction device, and the correction system of the present embodiment adopt a specific lighting control manner for an LED lamp panel using COB type LED modules as light emitting units, that is, each time the same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules are controlled to be lit to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates are sequentially controlled to be lit to display the plurality of correction images; therefore, as the pixel pitch of the LED lamp panel becomes smaller, for example, smaller or equal to P1.5 (representing that the pixel pitch is 1.5mm), the embodiment can still obtain a more accurate dot positioning result, thereby improving the calibration efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a correction system for an LED lamp panel according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a specific embodiment of the LED lamp panel to be corrected shown in fig. 1.

Fig. 3 is a schematic circuit diagram of an embodiment of the COB type LED module shown in fig. 2.

Fig. 4 is a schematic flow chart of a method for correcting an LED lamp panel according to a first embodiment of the present invention.

Fig. 5A to 5D are schematic diagrams of four different states of the same-color LED lighting control manner corresponding to N × M pixel positions in each COB type LED module of the LED lamp panel shown in fig. 2.

Fig. 6 is a schematic flow chart of another method for correcting an LED lamp panel according to the first embodiment of the present invention.

Fig. 7 is a schematic block diagram of a correction device for an LED lamp panel according to a second embodiment of the present invention.

Fig. 8 is a schematic block diagram of another correction device for an LED lamp panel according to a second embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

[ first embodiment ] A method for manufacturing a semiconductor device

A first embodiment of the present invention provides a method for correcting an LED lamp panel, which is suitable for using a correction system 10 of an LED lamp panel shown in fig. 1. As shown in fig. 1, the correction system 10 includes: the upper computer 11, the display controller 13, the scan card 15 and the image acquisition device 17 are installed with correction software, and can be used for performing color correction such as brightness correction or brightness correction on the LED lamp panel 100 to be corrected. In this embodiment, the upper Computer 11 is, for example, a Personal Computer (PC) with installed calibration software, and the installed calibration software is, for example, novalclb software developed by the company name, west annova cloud technologies, inc. Furthermore, the upper computer 11 may send an image display signal to the LED lamp panel 100 through the display controller 13 and the scanning card 15 connected in sequence to control the LED lamp panel 100 to correct the image display. The display controller 13, which may also be referred to as a transmitter card or system controller, typically includes a video interface, a video decoder, a programmable logic device, an ethernet PHY chip, a network transformer, and an ethernet power port (e.g., RJ45 port) electrically connected in sequence; of course, in some embodiments, the ethernet PHY chip, the network transformer, and the ethernet port may be replaced by an optical module (e.g., an SFP optical module, etc.) and an ethernet optical port that are electrically connected to each other. The scan card 15, which may also be referred to as a receiving card, a display control card or a module controller, is electrically connected between the display controller 13 and the LED lamp panel 100, and is connected to the display controller 13 through an ethernet interface (such as an ethernet interface or an optical interface), for example; furthermore, the scan card 15 typically includes an ethernet port, a network transformer, an ethernet PHY chip, a programmable logic device, and a lamp panel interface (such as a cable interface) electrically connected in sequence, but the embodiment of the invention is not limited thereto. The image acquisition device 17 comprises, for example, a digital camera and may even comprise a light gun.

The LED lamp panel 100 to be corrected in this embodiment adopts N × M LED pixel-integrated COB type LED modules as light emitting units, and N, M are positive integers greater than or equal to 2 respectively. For convenience of description, for example, as shown in fig. 2, the LED lamp panel 100 includes a circuit board 101 and 4 × 8 COB type LED modules 103 soldered on the circuit board 101; it can be understood that the number of COB type LED modules 103 on a single LED lamp panel 100 can be flexibly set according to actual requirements, and is not limited herein. As shown in fig. 3, for example, a single COB type LED module 103 includes four groups of RGB-LEDs as 2 × 2 (corresponding to N, M, each having a value of 2) LED pixels that are independently controlled and arranged in rows and columns, and each group of RGB-LEDs is composed of a red LED, a green LED, and a blue LED; that is, the COB type LED module 103 is a four-in-one LED module including four LED pixels in total of 2 × 2. In fig. 3, eight electrodes are provided on a single COB type LED module 103 to electrically connect to the circuit board 101, but the number of electrodes provided on the single COB type LED module 103 is not limited to eight, and may be sixteen or another number. It should be understood that the value of N, M is not limited to 2, and may be other positive integers greater than 2.

As described above, referring to fig. 4, the method for correcting the LED lamp panel 100 of the present embodiment includes, for example, the steps of:

s11: controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images;

s13: controlling an image acquisition device to acquire the plurality of corrected images to obtain respective color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance and chrominance information;

s15: generating pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules for the LED lamp panel to perform color correction according to the color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules and a set color target value.

Specifically, step S11 will be described in detail below with reference to fig. 5A to 5D by taking an example of acquiring a red corrected image. In fig. 5A to 5D, the same-color LEDs of the LED pixels of the COB type LED modules at the same one of the nxm pixel positions are controlled to be lit each time to display one corrected image, and the nxm LED pixels of each of the COB type LED modules are sequentially controlled to be lit to display a plurality of corrected images. More specifically, in fig. 5A, the red LED of the LED pixel at the upper left corner pixel position in each COB type LED module 103 is controlled to be turned on (as indicated by the black circle in fig. 5A), so that the LED lamp panel 100 displays a red image for the image capturing device 17 to capture; in fig. 5B, the red LED of the LED pixel at the upper right corner pixel position in each COB type LED module 103 is controlled to be turned on, so that the LED lamp panel 100 displays another red image for the image capturing device 17 to capture; in fig. 5C, the red LED of the LED pixel at the lower left corner pixel position in each COB type LED module 103 is controlled to be turned on, so that the LED lamp panel 100 displays another red image for the image capturing device 17 to capture; and in fig. 5D, the red LED of the LED pixel at the lower right corner pixel position in each COB type LED module 103 is controlled to be turned on, so that the LED lamp panel 100 displays another red image for the image capturing device 17 to capture. As a result, the 2 × 2 LED pixels of each of the COB type LED templates 103 are sequentially controlled to be turned on to sequentially display four red images. Similarly, four green images may be sequentially displayed, and four blue images may also be sequentially displayed, using a similar lighting control manner.

In step S13, the image capturing device 17 is controlled by, for example, the correction software installed in the upper computer 11 to capture and transmit the four sequentially displayed (corresponding to N × M ═ 2 × 2) red images, the four sequentially displayed (corresponding to N × M ═ 2 × 2) green images, and the four sequentially displayed (corresponding to N × M ═ 2 × 2) blue images to the upper computer 11, and the upper computer 11 performs image processing operations such as area positioning and dot positioning on the twelve captured corrected images (i.e., the four red images, the four green images, and the four blue images) to obtain color information, such as luminance information or luminance and chrominance information, of the four LED pixels of each of the 4 × 8 COB type LED modules 103 on the LED lamp panel 100. The area positioning and the point positioning can be performed by using the existing mature technologies, and refer to the technical scheme described in the chinese patent invention with the application date of 04/27 in 2017 and the name of "image point positioning method and image point positioning device" owned by the company name of science and technology limited to west nova cloud, or other mature technical schemes, which are not described herein again.

In step S15, for example, the correction software installed by the upper computer 11 generates pixel-by-pixel color correction coefficients, such as pixel-by-pixel luminance correction coefficients or pixel-by-pixel luminance correction coefficients, of the 4 × 8 COB type LED modules 103 for the LED lamp panel 100 to perform color correction, such as luminance correction or luminance correction, based on the color information of each of the N × M (such as 2 × 2) LED pixels of each of the 4 × 8 COB type LED modules 103 on the LED lamp panel 100 and a set color target value, such as a luminance target value or a luminance target value. For example, taking the luminance and chrominance target values as an example, which include a luminance target value and a chrominance target value, the luminance target value and the chrominance target value are set as the existing mature technology, the luminance target value may be a luminance average value obtained by performing normal distribution analysis on the same-color luminance values of all the LED pixels included in the 4 × 8 COB type LED modules 103 to remove the LED pixels with too low luminance values and then averaging the luminance values of the remaining LED pixels, or the luminance average value is properly adjusted by a certain percentage to be used as the luminance target value; the chromaticity target value may be obtained by calculating CIE chromaticity coordinates of each LED pixel of each COB type LED module 103 including the three-color red, green, and blue LEDs to obtain a corresponding color gamut, and obtaining a common color gamut of each LED pixel and the CIE chromaticity coordinates corresponding to the common color gamut. After the luminance and chromaticity target values are set, the acquired luminance and chromaticity information of the red, green, and blue LEDs included in the 4 × 8 COB type LED modules 103 is used as original luminance and chromaticity information, and pixel-by-pixel luminance and chromaticity correction coefficients of each COB type LED module 103 can be obtained based on the existing mature luminance and chromaticity correction coefficient calculation method, for example, the luminance and chromaticity correction coefficients of each LED pixel in each COB type LED module 103 include three correction coefficients corresponding to the red LEDs, three correction coefficients corresponding to the green LEDs, and three correction coefficients corresponding to the blue LEDs.

Up to this point, the pixel-by-pixel color correction coefficients, such as the pixel-by-pixel luminance correction coefficient or the pixel-by-pixel luminance and chrominance correction coefficient, of the 4 × 8 COB type LED modules 103 of the LED lamp panel 100 can be obtained.

Referring to fig. 6, after obtaining the pixel-by-pixel color correction coefficients of the 4 × 8 COB type LED modules 103 of the LED lamp panel 100, the correction method of this embodiment further includes the following steps:

s17: storing the pixel-by-pixel color correction coefficients of the plurality of COB type LED modules to a non-volatile memory of the LED lamp panel and/or to a database.

In this way, when the LED lamp panel 100 is subsequently applied to an LED display screen for normal image display, the scanning card connected to the LED lamp panel 100 in the LED display screen may perform image correction using the pixel-by-pixel color correction coefficient.

In summary, the foregoing embodiments of the present invention adopt a specific lighting control manner for the LED lamp panel 100 using the COB type LED modules 103 as the light emitting units, that is, each time the same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of COB type LED modules are controlled to be lit to display one of the plurality of corrected images, and the N × M LED pixels of each of the on-chip type LED templates are sequentially controlled to be lit to display the plurality of corrected images; therefore, as the pixel pitch of the LED lamp panel 100 becomes smaller, for example, smaller or equal to P1.5 (representing that the pixel pitch is 1.5mm), the embodiment can still obtain a more accurate dot positioning result, and further improve the calibration efficiency.

[ second embodiment ]

Referring to fig. 7, an embodiment of the present invention provides a correction device 70 for an LED lamp panel, where the LED lamp panel includes a circuit board and a plurality of chip-on-board LED modules soldered on the circuit board, each of the chip-on-board LED modules includes N × M LED pixels that are independently controlled and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the N × M LED pixels respectively correspond to N × M pixel positions, and each of the LED pixels includes a plurality of LEDs with different colors; the correction device 70 includes: the method comprises the following steps: a display control module 71, an acquisition control module 73, and a coefficient generation module 75.

Wherein the display control module 71 is, for example, configured to control the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images; the acquisition control module 73 is configured to control an image acquisition device to acquire the plurality of corrected images, for example, to obtain color information of each of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance and chrominance information; and the coefficient generating module 75 is configured to generate pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules for color correction by the LED lamp panel, for example, according to the color information of each of the N × M LED pixels of each of the plurality of chip-on-board LED modules and a set color target value.

For the specific functional details of the display control module 71, the acquisition control module 73 and the coefficient generation module 75, reference may be made to the detailed description in the foregoing first embodiment, which is not repeated herein. It should be noted that the display control module 71, the acquisition control module 73 and the coefficient generation module 75 may be software modules stored in the non-volatile memory and executed by the processor to perform the steps S11, S13 and S15 in the first embodiment.

Optionally, as an embodiment of the present invention, the plurality of different color LEDs in each of the LED pixels includes a red LED, a green LED, and a blue LED; the display control module 71 is specifically configured to: controlling the plurality of chip-on-board LED modules to display N × M red corrected images in the target lighting manner; controlling the plurality of chip-on-board LED modules to display N × M green corrected images in the target lighting manner; and controlling the plurality of chip-on-board LED modules to display N × M blue-corrected images in the target lighting manner. In this way, the present embodiment can realize single color correction image display and capture by N × M lighting controls.

Optionally, as another embodiment of the present invention, the display control module 71 is specifically configured to: sending an image display signal to the LED lamp panel through a display controller and a scanning card which are sequentially connected so as to control the plurality of chip-on-board LED modules to display a plurality of correction images in the target lighting mode, wherein the scanning card is electrically connected between the display controller and the LED lamp panel, and the scanning card is connected with the display controller through an Ethernet interface (such as an Ethernet electric port or an optical port).

Referring to fig. 8, optionally, as an embodiment of the present invention, the correcting apparatus of this embodiment further includes: a coefficient storage block 77. Wherein the coefficient storage module 77 is used for storing the pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules to a non-volatile memory of the LED lamp panel and/or to a database, for example. That is, the coefficient storage module 77 may be stored in the non-volatile memory as a software module and executed by the processor to perform the operation of step S17 in the first embodiment. Therefore, when the LED lamp panel is subsequently applied to an LED display screen for normal image display, the scanning card connected with the LED lamp panel in the LED display screen can use the pixel-by-pixel color correction coefficient for image correction.

In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

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

The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The correction method of the LED lamp panel is characterized in that the LED lamp panel comprises a circuit board and a plurality of chip-on-board LED modules welded on the circuit board, each chip-on-board LED module comprises N multiplied by M LED pixels which are independently controlled and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the N multiplied by M LED pixels respectively correspond to N multiplied by M pixel positions, and each LED pixel comprises a plurality of LEDs with different colors; the correction method comprises the following steps:

controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images;

controlling an image acquisition device to acquire the plurality of corrected images to obtain respective color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance and chrominance information;

generating pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules for the LED lamp panel to perform color correction according to the color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules and a set color target value.

2. The correction method of claim 1, wherein the plurality of different color LEDs in each of the LED pixels includes a red LED, a green LED, and a blue LED; the controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner includes: controlling the plurality of chip-on-board LED modules to display N × M red corrected images in the target lighting manner; controlling the plurality of chip-on-board LED modules to display N × M green corrected images in the target lighting manner; and controlling the plurality of chip-on-board LED modules to display N × M blue-corrected images in the target lighting manner.

3. The calibration method according to claim 2, wherein the value of N is 2, the value of M is 2, and accordingly each of the on-board chip LED modules is a four-in-one LED module.

4. The correction method according to claim 1, wherein said controlling the plurality of chip-on-board LED modules to display a plurality of correction images in a target lighting manner comprises:

through the display controller and the scanning card that connect gradually to the LED lamp plate sends the image display signal in order to control a plurality of chip type LED modules on the board with the mode shows a plurality of correction images are lighted to the target, wherein the scanning card electric connection be in the display controller with between the LED lamp plate, just the scanning card with through ethernet interface connection between the display controller.

5. The correction method as set forth in claim 1, further comprising:

storing the pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules to a non-volatile memory of the LED lamp panel and/or to a database.

6. The correction device for the LED lamp panel is characterized in that the LED lamp panel comprises a circuit board and a plurality of chip-on-board LED modules welded on the circuit board, each chip-on-board LED module comprises N multiplied by M LED pixels which are independently controlled and arranged in rows and columns, N, M is a positive integer greater than or equal to 2, the N multiplied by M LED pixels respectively correspond to N multiplied by M pixel positions, and each LED pixel comprises a plurality of LEDs with different colors; the correction device includes:

a display control module for controlling the plurality of chip-on-board LED modules to display a plurality of corrected images in a target lighting manner, wherein the target lighting manner includes: controlling lighting of same-color LEDs of the LED pixels of the same one of the N × M pixel positions of the plurality of chip-on-board LED modules to display one of the plurality of correction images, and the N × M LED pixels of each of the chip-on-board LED templates being sequentially controlled to be lit to display the plurality of correction images;

an acquisition control module for controlling an image acquisition device to acquire the plurality of corrected images to obtain respective color information of the N × M LED pixels of each of the plurality of chip-on-board LED modules, wherein the color information is luminance information or luminance and chrominance information;

a coefficient generating module, configured to generate pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules for color correction by the LED lamp panel according to the color information of each of the N × M LED pixels of each of the plurality of chip-on-board LED modules and a set color target value.

7. The correction device of claim 6, wherein the plurality of different color LEDs in each of the LED pixels comprises a red LED, a green LED, and a blue LED; the display control module is specifically configured to: controlling the plurality of chip-on-board LED modules to display N × M red corrected images in the target lighting manner; controlling the plurality of chip-on-board LED modules to display N × M green corrected images in the target lighting manner; and controlling the plurality of chip-on-board LED modules to display N × M blue-corrected images in the target lighting manner.

8. The calibration apparatus of claim 6, wherein the display control module is specifically configured to: through the display controller and the scanning card that connect gradually to the LED lamp plate sends the image display signal in order to control a plurality of chip type LED modules on the board with the mode shows a plurality of correction images are lighted to the target, wherein the scanning card electric connection be in the display controller with between the LED lamp plate, just the scanning card with through ethernet interface connection between the display controller.

9. The correction device of claim 6, further comprising:

a coefficient storage module for storing the pixel-by-pixel color correction coefficients of the plurality of chip-on-board LED modules to a non-volatile memory of the LED lamp panel and/or to a database.

10. The utility model provides a correction system of LED lamp plate which characterized in that includes:

the upper computer is provided with correction software;

a display controller;

the scanning card is electrically connected with the upper computer through the display controller and is used for electrically connecting the LED lamp panel to be corrected; and

the image acquisition equipment is electrically connected with the upper computer;

wherein the upper computer is used for executing the correction method according to any one of claims 1 to 5.