Display module, manufacturing method therefor, display apparatus, compensation method and electronic device

Abstract

Disclosed herein are a display module, a manufacturing method therefor, a display apparatus, a compensation method and an electronic device. The display module comprises: a display panel (100), a first PCB (110), a second PCB (120), and an adapter circuit (130). The first PCB (110) is bound to the display panel (100), the first PCB (110) being provided with an adapter interface (113). A timing control chip (121) and a first storage chip (122) are provided on the second PCB (120). The adapter circuit (130) comprises a first connecting end and a second connecting end, the first connecting end being electrically connected to a signal output end of the second PCB (120), and the second connecting end being mated to the adapter interface (113), so as to transmit to the first PCB (110) a signal output by the second PCB (120).

Description

Display module and manufacturing method thereof, display device, compensation method and electronic equipment CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202410130449.3, filed on January 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure belongs to the field of display technology and relates to a display module and a preparation method thereof, a display device, a compensation method and an electronic device. Background Art

[0003] In recent years, self-luminous display panels have experienced rapid development and are widely used in various display products due to their advantages such as fast response, wide viewing angle, high brightness, vivid colors, and thinness. However, due to factors such as production process or wear and tear during use, self-luminous display panels are prone to uneven brightness (English: Mura) of the display screen. As a result, technology to remove this uneven brightness (English: Demura) has emerged. Demura technology is a technology that detects the mura phenomenon in the display panel and eliminates it to achieve uniform brightness of the display screen. Summary of the Invention

[0004] In a first aspect of the present disclosure, a display module is provided, comprising: a display panel; a first PCB board, the first PCB board being bound and connected to the display panel, and a transfer interface being provided on the first PCB board; a second PCB board, the second PCB board being provided with a timing control chip and a first memory chip, the timing control chip being electrically connected to the first memory chip; and a transfer circuit, the transfer circuit comprising a first connection end and a second connection end, the first connection end being electrically connected to a signal output end of the second PCB board, and the second connection end being plugged into the transfer interface to transmit a signal output by the second PCB board to the first PCB board.

[0005] In combination with the first aspect of the present disclosure, in some embodiments, a second storage chip is further provided on the first PCB board, and the second storage chip is configured to store verification data, and the verification data is used to verify the brightness compensation data to be burned. After the verification is passed, the brightness compensation data is burned to the first storage chip.

[0006] In combination with the first aspect of the present disclosure, in some embodiments, the second PCB board is also provided with: a power management chip, a voltage conversion circuit and a gamma circuit, the power management chip and the voltage conversion circuit are electrically connected to the timing control chip respectively, and the gamma circuit is electrically connected to the power management chip.

[0007] In a second aspect of the present disclosure, a method for preparing a display module is provided, which is used to prepare the display module provided by the first aspect of the present disclosure, the method comprising: binding and connecting a display panel to a first PCB board; performing a demura process on the display panel in advance to generate brightness compensation data of the display panel, and storing the brightness compensation data and identification information of the display panel in a target location in correspondence; forming a cover plate on the display panel; plugging a second PCB board into the first PCB board; and downloading the brightness compensation data from the target location based on the identification information of the display panel, and burning the downloaded brightness compensation data into a first storage chip provided on the second PCB board.

[0008] In conjunction with the second aspect of the present disclosure, in some embodiments, a second storage chip is provided on the first PCB board. After generating the brightness compensation data of the display panel, the method further includes: generating verification data for the brightness compensation data, and writing the verification data into the second storage chip. The step of storing the brightness compensation data and the identification information of the display panel in a target location in correspondence includes: storing the brightness compensation data, the verification data for the brightness compensation data, and the identification information of the display panel in a target location in correspondence. Before burning the downloaded brightness compensation data into the first storage chip provided on the second PCB board, the method further includes: reading verification data from the second storage chip, comparing the read verification data with the verification data of the downloaded brightness compensation data, and if they are consistent, executing the step of burning the downloaded brightness compensation data into the first storage chip provided on the second PCB board.

[0009] In conjunction with the second aspect of the present disclosure, in some embodiments, after forming a cover plate on the display panel and before plugging the second PCB board into the first PCB board, the method further includes: performing a lighting test on the display panel; and before storing the brightness compensation data and the identification information of the display panel in a target location in correspondence, the method further includes: obtaining a simulation diagram for the lighting test based on the brightness compensation data. Storing the brightness compensation data and the identification information of the display panel in a target location in correspondence includes: storing the brightness compensation data, the simulation diagram, and the identification information of the display panel in a target location in correspondence.

[0010] In combination with the second aspect of the present disclosure, in some embodiments, performing a lighting detection on the display panel includes: obtaining identification information of the display panel; downloading the simulation image from the target location based on the identification information; and controlling the display panel to display the simulation image for lighting detection.

[0011] In combination with the first aspect of the present disclosure, in some embodiments, a second storage chip is provided on the first PCB board. After generating the brightness compensation data of the display panel, the method further includes: generating verification data for the brightness compensation data, and writing the verification data into the second storage chip. The brightness compensation data, the simulation diagram, and the identification information of the display panel are stored correspondingly in the target location, including: storing the brightness compensation data, the verification data for the brightness compensation data, the simulation diagram, and the identification information of the display panel correspondingly in the target location. The simulation diagram is downloaded from the target location based on the identification information of the display panel; and the display panel is controlled to display the simulation diagram, including: downloading the simulation diagram and verification data from the target location based on the identification information of the display panel, reading the verification data from the second storage chip, comparing the read verification data with the downloaded verification data, and if they are consistent, controlling the display panel to display the simulation diagram.

[0012] In a third aspect of the present disclosure, a display device is provided, comprising: the display module provided in the first aspect of the present disclosure.

[0013] In a fourth aspect of the present disclosure, a brightness compensation method is provided, which is applied to perform brightness compensation on the display module provided in the first aspect of the present disclosure, the method comprising: obtaining brightness compensation data and identification information of a display panel to be compensated, and storing the brightness compensation data and the identification information in correspondence to a target location; and obtaining identification information of a display panel to be burned, downloading the brightness compensation data from the target location based on the obtained identification information, and burning the downloaded brightness compensation data into a first storage chip provided on a second PCB board.

[0014] In combination with the fourth aspect of the present disclosure, in some embodiments, a second storage chip is provided on the first PCB board of the display module, and the brightness compensation data and the identification information are stored in a target location correspondingly, including: generating verification data of the brightness compensation data; writing the verification data into the second storage chip; and storing the brightness compensation data, the verification data of the brightness compensation data and the identification information in a target location correspondingly.

[0015] In combination with the fourth aspect of the present disclosure, in some embodiments, the brightness compensation data is downloaded from the target location based on the acquired identification information, and the downloaded brightness compensation data is burned into a first storage chip set on the second PCB board, including: downloading the brightness compensation data and verification data of the brightness compensation data from the target location based on the acquired identification information; reading the verification data from the second storage chip; and comparing the read verification data with the downloaded verification data, and if they are consistent, burning the downloaded brightness compensation data into the first storage chip set on the second PCB board.

[0016] In combination with the fourth aspect of the present disclosure, in some embodiments, the brightness compensation data, the verification data of the brightness compensation data, and the identification information are stored correspondingly in a target location, including: obtaining a simulation diagram for lighting detection based on the brightness compensation data; and storing the brightness compensation data, the simulation diagram, and the identification information correspondingly in a target location.

[0017] In combination with the fourth aspect of the present disclosure, in some embodiments, the above-mentioned brightness compensation method also includes: obtaining identification information of the display panel to be detected, downloading the simulation image from the target position based on the obtained identification information, and controlling the display panel to be detected to display the downloaded simulation image for lighting detection.

[0018] In a fifth aspect of the present disclosure, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the brightness compensation method provided in the fourth aspect of the present disclosure.

[0019] The above description is only an overview of the technical solutions provided by some embodiments of the present disclosure. In order to more clearly understand the technical means of the embodiments of the present disclosure, they can be implemented in accordance with the contents of the specification. In order to make the embodiments of the present disclosure more obvious and easy to understand, the specific implementation methods of the embodiments of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0021] FIG1 shows a schematic structural diagram of an exemplary display module;

[0022] FIG2 shows a schematic diagram of a display module according to some embodiments of the present disclosure;

[0023] FIG3 shows a schematic diagram of a first PCB board according to some embodiments of the present disclosure;

[0024] FIG4 shows a schematic diagram of a second PCB board according to some embodiments of the present disclosure;

[0025] FIG5 shows a schematic structural diagram of a display device according to some embodiments of the present disclosure;

[0026] FIG6 shows a flow chart of a method for preparing a display module according to some embodiments of the present disclosure;

[0027] FIG7 shows a flow chart of a method for preparing a display module according to other embodiments of the present disclosure;

[0028] FIG8 shows a demura effect diagram of an exemplary curved screen; and

[0029] FIG9 shows a flowchart of a brightness compensation method according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0030] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] It should be noted that the term "plurality" used herein includes two or more than two. "At least one" includes one or more than one. "Include" or "comprising" and similar expressions mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. "Up," "down," "left," "right," etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] The terms "parallel", "perpendicular", and "equal" appearing in this document include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0033] Figure 1 shows a schematic diagram of the structure of an exemplary display module. As shown in Figure 1, in a conventional medium-sized display module, all integrated circuit chips (ICs) and peripheral components are typically integrated onto a single PCB 1. After the module is folded back, this PCB 1 generates significant heat on the back of the display, failing to meet the needs of some customers. Furthermore, if the module suffers from binding loss or physical damage, the entire PCB 1 will be scrapped, resulting in high costs and a long electronic material cycle.

[0034] Furthermore, to meet customer customization needs, display products, such as automotive displays, are becoming increasingly diverse in form factor. Traditionally, display module manufacturing involves performing the demura process after completing the cover lamination process. The inventors discovered in actual production research that there are some difficulties in implementing the Demura process: ① The entire screen cannot be focused: the cover plate is relatively thick, and the existing camera mechanism (one camera, one imaging) cannot correspond to products with a large depth; ② The equipment needs to be frequently modified: for display products of different forms, camera splicing (i.e., multi-step camera shooting) or line scan camera technologies need to be adopted, but currently they are difficult to implement in mass production, and the equipment structure is complex, the precision requirements are high, the layout is large, and the pre-processing algorithm is difficult; ③ The outer layer of the cover plate is usually also provided with various functional film layers, such as anti-fingerprint (AF) film layers, anti-reflection (AR) film layers, and anti-glare (AG) film layers, etc. These film layers often affect the Demura equipment's photography, making it impossible to accurately capture the true brightness of each pixel, and even leading to Demura miscompensation.

[0035] Therefore, some embodiments of the present disclosure also provide a display module and a display device, which are divided into two PCB boards, namely a first PCB board and a second PCB board, and higher-cost chips such as the timing control chip and the first storage chip are arranged on the second PCB board, so that after the process of the display module is basically completed, the second PCB board can be assembled by plugging, which is beneficial to reduce the waste of electronic materials caused by module binding process loss or physical damage, and save production costs.

[0036] In addition, some embodiments of the present disclosure also provide a method for preparing a display module, a brightness compensation method, and an electronic device, which can implement the Demua process before forming a cover plate, and can effectively avoid the difficulties brought by the above-mentioned cover plate to the implementation of the Demua process, which is conducive to reducing the difficulty of implementing the Demua process and ensuring the Demura effect.

[0037] Hereinafter, the display module and its manufacturing method, the display device, the compensation method and the electronic device provided by some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0038] FIG2 shows a schematic diagram of a display module according to some embodiments of the present disclosure. As shown in FIG2 , some embodiments of the present disclosure provide a display module 10, comprising: a display panel 100, a first PCB board 110, a second PCB board 120, and a transfer circuit 130. The first PCB board 110 is bound and connected to the display panel 100, and a transfer interface 113 is provided on the first PCB board 110. A timing control chip 121 and a first storage chip 122 are provided on the second PCB board 120, and the timing control chip 121 is electrically connected to the first storage chip 122. The transfer circuit 130 includes a first connection end and a second connection end, the first connection end being electrically connected to the signal output end of the second PCB board 120, and the second connection end being plugged into the transfer interface 113 on the first PCB board 110 to transmit the signal output from the second PCB board 120 to the first PCB board 110.

[0039] Since the important components such as the timing control chip 121 and the first memory chip 122 are separately arranged on the second PCB board 120, and the second PCB board 120 is plugged into the first PCB board 110 via the transfer line 130, the second PCB board 120 can be assembled after the module process is basically completed, thereby reducing the waste of electronic materials caused by module binding process loss or physical damage, and saving production costs. Imagine if the entire PCB board with important IC components such as the timing control chip 121 is directly bound to the display panel 100, it is not only easy to cause binding process loss, but also easy to cause yield loss in the intermediate process of the module. For example, the timing control chip 121 has the risk of physical damage and chip drop.

[0040] As shown in Figure 2, the display panel 100 may include a display area 101 and a non-display area 102 provided on at least one side of the display area 101. The display area 101 includes a plurality of pixels arranged in an array. In some embodiments, each pixel may include a plurality of sub-pixels, and each sub-pixel may display a single color, such as a red sub-pixel displays red, a green sub-pixel displays green, and a blue sub-pixel displays blue. The brightness (grayscale) of the sub-pixels of different colors in each pixel can be adjusted, and a plurality of colors can be displayed by color combination and superposition, thereby realizing a color display of the display panel 100. In some embodiments, the plurality of sub-pixels include three sub-pixels, namely a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the luminous colors of different sub-pixels are different. For example, the first sub-pixel may be a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel. Of course, in other embodiments, each pixel may also include other numbers of sub-pixels, such as four sub-pixels, which can be set according to the actual application scenario, and the present disclosure is not limited to this. In other embodiments, each pixel may also include only one sub-pixel, which has multiple light-emitting layers with different light-emitting colors and are stacked to achieve color display by controlling the light-emitting timing of each light-emitting layer. The present disclosure does not limit this.

[0041] A bonding area is provided in the non-display area 102 on at least one side of the display area 101. The bonding area includes multiple bonding terminals (Bonding Pad). In some embodiments, the first PCB 110 can be bonded to the display panel 100 via a Chip On Flex (COF) 140. One end of the COF 140 is bonded to the multiple bonding terminals, and the other end is bonded to the first PCB 110.

[0042] In some embodiments, the display panel 100 can be a self-luminous display panel, for example, an organic light emitting diode (OLED) display panel or a quantum dot organic light emitting diode (QLED) display panel, etc., and is specifically configured according to the needs of the actual application scenario, and the present disclosure does not impose any restrictions on this.

[0043] In some embodiments, the first PCB board 110 can extend along the X-axis direction in Figure 2 and can thus also be referred to as an XPCB board. The number of first PCB boards 110 can be one, or multiple, depending on the needs of the actual product, and this disclosure does not impose any restrictions on this. Figure 2 illustrates two first PCB boards 110 as an example. In some embodiments, there are multiple first PCB boards 110, and the multiple first PCB boards 110 can be electrically connected via a flexible circuit board, and the second PCB board 120 can be plugged into at least one of the first PCB boards 110 via a transfer circuit 130.

[0044] The second PCB 120 is equipped with important IC components such as a timing controller IC 121 (TCON IC) and a first memory chip 122, and is therefore also referred to as a TCON board. In some embodiments, the first memory chip 122 may be a non-volatile memory, such as a flash memory chip. Of course, in addition to the timing controller IC 121 and the first memory chip 122, other relatively important components may also be installed on the second PCB 120 according to actual product needs, and this disclosure does not limit this.

[0045] In some embodiments, the transfer circuit 130 can be implemented by a flexible printed circuit (FPC). The second PCB board 120 is plugged into the first PCB board 110 via the transfer FPC provided with the transfer circuit 130, thereby transmitting signals output by the second PCB board 120, such as data signals and gate drive signals (such as GOA signals), to the source drive circuit and gate drive circuit of the display panel 100 through the first PCB board 110. In some embodiments, the second PCB board 120 can also be provided with a transfer interface. By plugging the first connection end of the transfer FPC into the transfer interface on the second PCB board 120 and the second connection end into the transfer interface 113 on the first PCB board 110, the second PCB board 120 can be plugged into the first PCB board 110, thereby completing the assembly of the second PCB board 120.

[0046] FIG3 shows a schematic diagram of a first PCB board 110 according to some embodiments of the present disclosure, and FIG4 shows a schematic diagram of a second PCB board 120 according to some embodiments of the present disclosure. As shown in FIG3 , conventional components such as capacitors 112 and resistors 111, as well as an adapter 113, may be provided on the first PCB board 110. As shown in FIG4 , the second PCB board 120 is provided with a timing control chip 121, a first memory chip 122, a power management chip 123 (Power Management Integrated Circuit, PMIC), a voltage conversion circuit 124 (Level Shift, LS), and a gamma circuit. The power management chip 123 and the voltage conversion circuit 124 are respectively electrically connected to the timing control chip 121, and the gamma circuit 125 is electrically connected to the power management chip 123. The gamma circuit 125 may be implemented, for example, by a programmable gamma correction buffer circuit chip (P_Gamma IC). It should be noted that the positions of the components shown in FIG3 and FIG4 on the respective PCB boards are for illustration only and are not intended to be limiting. The actual positions will be determined based on the circuit layout requirements. Of course, in addition to the components shown in Figures 3 and 4, other components can be set on the first PCB board 110 and the second PCB board 120 according to actual product needs. For example, a display interface can also be set on the second PCB board 120, and this disclosure does not limit this.

[0047] As shown in FIG3 , in some embodiments, a second storage chip 114 is further provided on the first PCB board 110. Second storage chip 114 is configured to store verification data, which is used to verify the brightness compensation data to be burned. Once the verification passes, the brightness compensation data is burned into first storage chip 122 to ensure that the data is not burned into the wrong screen. In some embodiments, second storage chip 114 may be an electrically erasable programmable read-only memory (EEPROM).

[0048] FIG5 shows a schematic structural diagram of a display device 20 according to some embodiments of the present disclosure. As shown in FIG5 , some embodiments of the present disclosure provide a display device 20, comprising the display module 10 provided in any of the embodiments described above. The display device 20 can be a flat display product or a curved screen display product. The display device 20 can be, for example, a vehicle-mounted display screen, a wearable display product, a monitor, a television, a tablet computer, a laptop computer, a mobile phone, a digital photo frame, a navigator, or other product or component with a display function. Of course, the display device 20 provided in the embodiments of the present disclosure is not limited to the types listed above.

[0049] Figure 6 shows a flow chart of a method for preparing a display module 10 according to some embodiments of the present disclosure. Some embodiments of the present disclosure provide a method for preparing a display module 10, which can be used to prepare the display module 10 provided in any of the above embodiments. As shown in Figure 6, the method can include at least the following steps S110 to S150.

[0050] In step S110 , the display panel is bound and connected to the first PCB board.

[0051] In step S120 , a demura process is performed on the display panel in advance to generate brightness compensation data of the display panel, and the brightness compensation data and identification information of the display panel are stored in a target location in correspondence with each other.

[0052] Step S130: forming a cover plate on the display panel.

[0053] Step S140: plug the second PCB board into the first PCB board.

[0054] Step S150 : downloading brightness compensation data from a target location based on identification information of the display panel, and burning the downloaded brightness compensation data into a first storage chip provided on the second PCB board.

[0055] In the manufacturing process of the display module 10, after the display panel 100 is prepared (without the cover plate attached), step S110 can be performed to bond the first PCB 110 to the display panel 100. After the bonding of the first PCB 110 is completed, step S120 is performed to pre-demolish the display panel 100, and then step S130 is performed.

[0056] After attaching the first PCB 110 and before forming the cover plate on the display panel 100, the display panel 100 is subjected to a demura process. The resulting brightness compensation data is stored in a target location corresponding to the identification information of the display panel 100. After the second PCB 120 is assembled, the brightness compensation data is downloaded from the target location based on the identification information of the display panel 100 and burned into the first storage chip 122 provided on the second PCB 120 to eliminate mura from the display panel 100. By performing demura on the display panel 100 before forming the cover plate, the design difficulties caused by the cover plate in the demura process can be effectively avoided without significantly affecting the time consumption of the entire module process, as well as avoiding demura miscompensation caused by the functional film layer coated on the cover plate. This helps to reduce the difficulty of implementing the demura process and ensure the demura effect.

[0057] The mass production line for the display module 10 is equipped with multiple workstations, such as a demura workstation, a cover lamination workstation, a lighting inspection workstation, and a second PCB board 120 assembly workstation. It should be noted that the above division of the workstations is merely illustrative; these workstations can all be different, or some can be the same workstation. The configuration can be tailored to the needs of the actual production line, and this disclosure does not impose any limitations on this.

[0058] In some embodiments, the demura station can collect identification information (Panel ID) of the display panel 100 through an identification collection device, so that after generating brightness compensation data, the brightness compensation data and the identification information are stored in a target location in correspondence, thereby distinguishing the brightness compensation data of different display panels 100. It should be noted that the identification collection device is adapted to the identification setting method of the display panel 100. For example, if the identification is set by attaching or printing a graphic code on the display panel 100, then the identification collection device can be a code scanner such as a camera, so that the identification information of the display panel 100 can be collected in real time by scanning the code.

[0059] The industrial control system used in the mass production line of the display module 10 is provided with a host computer for issuing control commands. There can be one or more host computers, for example, one host computer can be provided at each workstation. The host computer can be, for example, a personal computer (PC) or other suitable computer device. In some embodiments, each host computer can be connected to the communication system used by the module production line via a network to facilitate data upload and download.

[0060] In some embodiments, the host computer of the Demura workstation can upload pre-generated brightness compensation data to a target location for storage, so that the brightness compensation data can be downloaded from the target location when it is subsequently needed for burning. In some embodiments, the brightness compensation data can be a binary (bin) file, or other applicable file types, which are not limited by this disclosure. In some embodiments, the target location can be a local database or a cloud, etc., which can be set according to actual needs, which is not limited by this disclosure.

[0061] In some embodiments, data can be written to the PCB board of the display panel 100 through a programmer (PG). The programmer can also be called a burner, which is connected to the host computer and the universal fixture of the display panel 100 respectively. It should be noted that since the method for preparing the display module 10 provided in some embodiments of the present disclosure is to assemble the second PCB board 120 after the display module 10 process is basically completed, in order to be able to control the display panel 100 to display the screen to meet the test requirements in the intermediate process of the display module 10, a pre-configured universal fixture can be plugged into the first PCB board 110 to temporarily replace the function of the second PCB board 120.

[0062] In some embodiments, the brightness compensation data of the display panel 100 includes a brightness compensation value for each pixel, and each pixel may include at least one sub-pixel. In the above-mentioned step S120, the display panel 100 is pre-demonstrated. The process of generating the brightness compensation data for the display panel 100 may include: controlling the display panel 100 to display a preset screen; capturing an image of the display screen through a camera; obtaining the brightness value of each pixel in the image; and determining the compensated brightness value of each pixel based on the difference between the target brightness value and the brightness value of each pixel in the image, thereby obtaining the brightness compensation data for the display panel 100. For details, please refer to the relevant art and will not be described in detail here. It is understood that by obtaining the brightness value of each pixel in the captured image and analyzing the brightness value, it is possible to determine the abnormal brightness area of ​​the display screen, that is, the area where the mura phenomenon occurs. In actual use, the brightness compensation data obtained can be used to adjust the brightness of the abnormal brightness area, so that the overly dark area becomes brighter and the overly bright area becomes darker, thereby eliminating the above-mentioned mura phenomenon of the display panel 100 and achieving a uniform brightness display effect.

[0063] In step S130, a cover plate can be formed on the display panel 100 by laminating. The cover plate can be, for example, cover glass (CG), or other cover plate materials can be used. The shape of the cover plate is adapted to the shape of the display panel 100. The cover plate can be a flat cover plate, or it can be a curved cover plate, depending on the needs of the actual display product. For example, for a curved display product, a 3D laminating device is required to achieve lamination between the flexible display panel 100 and the curved cover plate.

[0064] FIG7 illustrates a flow chart of a method for manufacturing a display module 10 according to other embodiments of the present disclosure. As shown in FIG7 , after executing step S130 and before executing step S140 , the method further includes step S131 of performing a lighting test on the display panel. Specifically, the display panel 100 is controlled to display an image to test image conditions such as brightness uniformity and the presence of dead pixels.

[0065] To improve the efficiency of lighting detection, in some embodiments, after generating the brightness compensation data in step S120 and before storing the brightness compensation data in a target location in association with the identification information of the display panel 100, the method further includes generating a simulation image for lighting detection based on the brightness compensation data. For example, several test grayscales may be predetermined, and images at these test grayscales, compensated with the brightness compensation data, may be generated as the simulation image for the inspection screen required for subsequent lighting detection. For details, please refer to related art and are not described in detail here.

[0066] Based on this, in some embodiments, the process of storing the brightness compensation data and the identification information of the display panel 100 in the target location in correspondence with each other in step S120 may include: storing the brightness compensation data, the simulation diagram, and the identification information of the display panel 100 in the target location in correspondence with each other. In some embodiments, the brightness compensation data and the simulation diagram applicable to the display panel 100 may be stored in the target location using the identification information of the display panel 100 as an index, so that in subsequent module processes, the required data can be downloaded from the target location, thereby improving data acquisition efficiency and minimizing the time consumption of the entire module process.

[0067] In some embodiments, the process of performing a lighting detection on the display panel 100 may include: obtaining identification information of the display panel 100; downloading a simulation diagram from a target location based on the identification information; and controlling the display panel 100 to display the simulation diagram for lighting detection. For example, a lighting detection station may collect identification information of the display panel 100 through an identification acquisition device, so that a host computer may obtain the identification information of the display panel 100 arriving at the station in real time, thereby obtaining a simulation diagram adapted to the display panel 100 from a target location based on the identification information. It should be noted that the host computer for uploading the simulation diagram and the host computer for downloading the simulation diagram may be the same host computer or different host computers, and the actual setting is based on the needs of the application scenario, and the present disclosure does not impose any restrictions on this.

[0068] In some embodiments, after the host computer downloads the simulation diagram from the target location, it can first be stored in a local designated storage path, and then the simulation diagram can be called from the designated storage path and loaded into the programmer in real time for display on the display panel 100. In some embodiments, the simulation diagram can be downloaded from the target location immediately after the identification information of the display panel 100 is collected (such as by scanning a code), and displayed while downloading, so as to reduce the time consumption of the lighting detection process, thereby ensuring that the upload and download of data does not substantially affect the time consumption of the entire module process.

[0069] After step S140 is executed, that is, after the assembly of the second PCB board 120 is completed, step S150 can be executed to download and burn the brightness compensation data. It should be noted that the host computer for uploading the brightness compensation data and the host computer for downloading the brightness compensation data can be the same host computer or different host computers. The actual setting is based on the needs of the application scenario, and the present disclosure does not impose any restrictions on this. In some embodiments, the host computer of the second PCB board 120 assembly station can obtain the identification information of the display panel 100, download the brightness compensation data from the target location based on the identification information of the display panel 100, and burn the downloaded brightness compensation data into the first storage chip 122 set on the second PCB board 120.

[0070] For example, the second PCB board 120 assembly station can collect the identification information of the display panel 100 arriving at the station through the identification acquisition device and send it to the host computer, so that the host computer can obtain brightness compensation data adapted to the display panel 100 from the target position based on the acquired identification information.

[0071] In some embodiments, to ensure the reliability of data burning, the brightness compensation data to be burned can be verified before burning. After passing the verification, the brightness compensation data is burned into the first storage chip 122. In some embodiments, a second storage chip 114 is provided on the first PCB board 110, and the second storage chip 114 is configured to store verification data.

[0072] Based on this, as shown in FIG7 , after generating the brightness compensation data in step S120, the method for manufacturing the display module 10 provided in some embodiments of the present disclosure further includes generating verification data for the brightness compensation data and writing the verification data into the second storage chip 114. For example, if the brightness compensation data is a binary file, the verification data may be a cyclic redundancy check (CRC) or other applicable verification code.

[0073] At this time, when uploading the brightness compensation data, the host computer also needs to upload the verification data of the brightness compensation data. As shown in Figure 7, the process of storing the brightness compensation data and the identification information of the display panel 100 in the target location in correspondence with each other in step S120 includes: storing the brightness compensation data, the verification data of the brightness compensation data, and the identification information of the display panel 100 in the target location in correspondence with each other.

[0074] Accordingly, as shown in FIG7 , in step S150 above, based on the identification information of the display panel 100, the brightness compensation data and verification data for the brightness compensation data can be downloaded from the target location, the verification data can be read from the second storage chip 114, and the read verification data can be compared with the downloaded verification data. If they are consistent, the downloaded brightness compensation data can be burned into the first storage chip 122 provided on the second PCB board 120. It should be noted that if they are inconsistent, it means that the data is incorrect, and the error needs to be promptly detected and resolved before the correct brightness compensation data is burned into the first storage chip 122 to ensure that the data is not burned into the wrong screen.

[0075] In some embodiments, the brightness compensation data, the verification data for the brightness compensation data, the simulation diagram, and the identification information of the display panel 100 are stored in a corresponding target location. In some embodiments, to ensure the reliability of the simulation diagram used in the lighting test, the downloaded simulation diagram may be verified using the verification data before the lighting test is performed on the display panel 100. Once the verification passes, the display panel 100 is controlled to display the downloaded simulation diagram for lighting effect testing.

[0076] In other words, the process of downloading the simulation image from the target location based on the identification information of the display panel 100 and controlling the display panel 100 to display the simulation image includes: downloading the simulation image and verification data from the target location based on the identification information of the display panel 100; reading the verification data from the second storage chip 114; comparing the read verification data with the downloaded verification data; and if they are consistent, controlling the display panel 100 to display the simulation image. If they are inconsistent, it indicates that the data is incorrect, and the error needs to be promptly identified and resolved before controlling the display panel 100 to display the correct simulation image to ensure the reliability of the lighting test results.

[0077] It should be noted that, in addition to the above-mentioned steps S110 to S150 , the method for preparing the display module 10 may further include other process steps, for which details may be referred to related arts and will not be described in detail here.

[0078] Figure 8 shows a demura effect diagram of an exemplary curved screen. Figure (a) in Figure 8 is a lighting effect diagram before CG bonding without demura. Figures (b) and (c) in Figure 8 are lighting effect diagrams after demura according to the preparation method provided in some embodiments of the present disclosure. Among them, Figure (b) is a lighting effect diagram before CG bonding, and Figure (c) is a lighting effect diagram after CG bonding and the connection of the second PCB board 120. It can be seen from Figure 8 that the Mura phenomenon in Figure (a) is more obvious, while the brightness of Figures (b) and (c) is more uniform, which can meet the brightness uniformity requirements. It can be seen that performing the demura process before CG bonding can also effectively eliminate the Mura phenomenon of the display panel 100 without affecting the final product effect of the module.

[0079] Therefore, the manufacturing method of the display module 10 provided in some embodiments of the present disclosure can realize the demura process before CG lamination without affecting the final effect of the module. In addition, the time consumption of the entire module process is basically not affected, and the production efficiency is high.

[0080] Some embodiments of the present disclosure also provide a brightness compensation method for performing brightness compensation on the display module 10 provided in any of the above embodiments. In some implementations, the brightness compensation method can be executed by a host computer. FIG9 shows a flowchart of a brightness compensation method according to some embodiments of the present disclosure. As shown in FIG9 , the brightness compensation method can include at least the following steps S210 to S220.

[0081] Step S210 , obtaining brightness compensation data and identification information of the display panel to be compensated, and storing the brightness compensation data and the identification information in a corresponding manner at a target location.

[0082] Step S220 , obtaining identification information of the display panel to be programmed, downloading brightness compensation data from a target location based on the obtained identification information, and programming the downloaded brightness compensation data into a first storage chip provided on the second PCB board.

[0083] It should be noted that the specific implementation process of step S210 and step S220 can refer to the relevant description in the above embodiment and will not be repeated here. Step S210 and step S220 can be performed by the same host computer, or they can be performed by different host computers, which can be determined according to the needs of the actual application scenario. This disclosure does not limit this. For example, when performed by different host computers, step S210 can be performed by the host computer of the Demura station, and step S220 can be performed by the host computer of the second PCB board 120 assembly station.

[0084] In some embodiments, a second storage chip is provided on the first PCB of the display module 10. The process of storing the brightness compensation data and identification information in a target location in correspondence with each other may include: generating verification data for the brightness compensation data; writing the verification data into the second storage chip 114; and storing the brightness compensation data, the verification data for the brightness compensation data, and the identification information in a target location in correspondence with each other. The specific implementation process and effects can be found in the relevant description of the embodiments above and will not be repeated here.

[0085] In some embodiments, the process of downloading the brightness compensation data from the target location based on the acquired identification information and burning the downloaded brightness compensation data into the first storage chip 122 provided on the second PCB board 120 may include: downloading the brightness compensation data and verification data of the brightness compensation data from the target location based on the acquired identification information; reading the verification data from the second storage chip 114; comparing the read verification data with the downloaded verification data; and if they are consistent, burning the downloaded brightness compensation data into the first storage chip 122 provided on the second PCB board 120 of the display panel 100. The specific implementation process and effects can be found in the relevant description of the above embodiment and will not be repeated here.

[0086] In some embodiments, the process of storing the brightness compensation data, the verification data for the brightness compensation data, and the identification information in the target location includes: generating a simulation image for lighting detection based on the brightness compensation data; and storing the brightness compensation data, the simulation image, and the identification information in the target location. The specific implementation process and effects can be found in the relevant description of the above embodiment and will not be repeated here.

[0087] In some embodiments, the brightness compensation method further includes: obtaining identification information of the display panel 100 to be detected, downloading a simulation diagram from a target location based on the obtained identification information, and controlling the display panel 100 to be detected to display the downloaded simulation diagram to perform lighting detection. It should be noted that the specific implementation process and effect of this step can be found in the relevant description in the above embodiment, which will not be repeated here. In addition, this step and the above-mentioned step S210 and / or step S220 can be executed by the same host computer, or can be executed by different host computers, which can be determined according to the needs of the actual application scenario, and the present disclosure does not limit this. In some embodiments, this step can be executed by the host computer of the lighting detection station.

[0088] In some embodiments, downloading the simulation image from the target location based on the acquired identification information and controlling the display panel 100 to display the downloaded simulation image may include: downloading the simulation image and verification data from the target location based on the acquired identification information; reading the verification data from the second storage chip 114; comparing the read verification data with the downloaded verification data, and if they are consistent, controlling the display panel 100 to display the simulation image. The specific implementation process and effects can be found in the relevant description of the above embodiment and will not be repeated here.

[0089] Some embodiments of the present disclosure also provide an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the above-mentioned brightness compensation method. The specific steps and effects of the brightness compensation method can be found in the relevant description of the above-mentioned method embodiment, which will not be repeated here. The electronic device can be an electronic device with host computer functions and communication functions, such as a personal computer, etc., which can upload and download data. Of course, the electronic device provided by the embodiments of the present disclosure is not limited to the types listed above.

[0090] Some embodiments of the present disclosure further provide a computer program product. When the computer program product is executed by a processor, it implements the steps of the above-mentioned brightness compensation method and can achieve the same technical effect. To avoid repetition, it is not described here.

[0091] Some embodiments of the present disclosure further provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the brightness compensation method described above are implemented and the same technical effects are achieved. To avoid repetition, the details are not described here. For example, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0092] It should be noted that the drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures can refer to general designs. In the absence of conflict, the embodiments of the present disclosure and the features therein can be combined with each other to obtain new embodiments.

[0093] Although some embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present disclosure.

Claims

1. A display module, comprising: Display panel; a first PCB board, the first PCB board being bound and connected to the display panel, and having a transfer interface provided on the first PCB board; a second PCB board, on which a timing control chip and a first memory chip are provided, and the timing control chip is electrically connected to the first memory chip; as well as The transfer circuit includes a first connection end and a second connection end, the first connection end is electrically connected to the signal output end of the second PCB board, and the second connection end is plugged into the transfer interface to transmit the signal output by the second PCB board to the first PCB board.

2. The display module according to claim 1, wherein: A second storage chip is also provided on the first PCB board. The second storage chip is configured to store verification data. The verification data is used to verify the brightness compensation data to be burned. After the verification passes, the brightness compensation data is burned into the first storage chip.

3. The display module according to claim 1, wherein: The second PCB board is also provided with: a power management chip, a voltage conversion circuit and a gamma circuit. The power management chip and the voltage conversion circuit are electrically connected to the timing control chip respectively, and the gamma circuit is electrically connected to the power management chip.

4. A method for preparing a display module, for preparing the display module according to any one of claims 1 to 3, the method comprising: Binding and connecting the display panel to the first PCB board; Performing a demura process on the display panel in advance to generate brightness compensation data of the display panel, and storing the brightness compensation data and identification information of the display panel in a target location in correspondence; forming a cover plate on the display panel; Inserting the second PCB board into the first PCB board; as well as The brightness compensation data is downloaded from the target location based on the identification information of the display panel, and the downloaded brightness compensation data is burned into a first storage chip provided on the second PCB board.

5. The method according to claim 4, wherein A second storage chip is provided on the first PCB board. After generating the brightness compensation data of the display panel, the method further includes: generating verification data for the brightness compensation data, and writing the verification data into the second storage chip; Storing the brightness compensation data and the identification information of the display panel in a target location in correspondence therewith includes: storing the brightness compensation data, verification data of the brightness compensation data, and the identification information of the display panel in a target location in correspondence therewith; Before burning the downloaded brightness compensation data into the first storage chip provided on the second PCB board, the method further includes: Verification data is read from the second storage chip, and the read verification data is compared with the verification data of the downloaded brightness compensation data. If they are consistent, the step of burning the downloaded brightness compensation data into the first storage chip set on the second PCB board is executed.

6. The method according to claim 4, after forming a cover plate on the display panel and before plugging a second PCB board onto the first PCB board, the method further comprises: Performing a lighting test on the display panel; Furthermore, before storing the brightness compensation data and the identification information of the display panel in a target location in correspondence with each other, the method further includes: obtaining a simulation diagram for the lighting detection based on the brightness compensation data; Storing the brightness compensation data and the identification information of the display panel in a target location in correspondence thereto includes: The brightness compensation data, the simulation diagram, and the identification information of the display panel are stored in a target location correspondingly.

7. The method according to claim 6, wherein: Performing a lighting test on the display panel includes: Acquiring identification information of the display panel; downloading the simulation map from the target location based on the identification information; and The display panel is controlled to display the simulation diagram to perform lighting detection.

8. The method according to claim 7, wherein: A second storage chip is provided on the first PCB board. After generating the brightness compensation data of the display panel, the method further includes: generating verification data of the brightness compensation data, and writing the verification data into the second storage chip; Storing the brightness compensation data, the simulation diagram, and the identification information of the display panel in a corresponding manner at a target location includes: storing the brightness compensation data, the verification data of the brightness compensation data, the simulation diagram, and the identification information of the display panel in a corresponding manner at the target location; Downloading the simulation image from the target location based on the identification information of the display panel; controlling the display panel to display the simulation image, including: downloading the simulation image and verification data from the target location based on the identification information of the display panel, reading the verification data from the second storage chip, comparing the read verification data with the downloaded verification data, and if they are consistent, controlling the display panel to display the simulation image.

9. A display device comprising: The display module according to any one of claims 1 to 3.

10. A brightness compensation method, applied to perform brightness compensation on the display module according to any one of claims 1 to 3, the method comprising: Acquire brightness compensation data and identification information of a display panel to be compensated, and store the brightness compensation data and the identification information in a target location in correspondence with each other; as well as The identification information of the display panel to be burned is obtained, the brightness compensation data is downloaded from the target location based on the obtained identification information, and the downloaded brightness compensation data is burned into a first storage chip provided on the second PCB board.

11. The method according to claim 10, wherein: A second storage chip is provided on the first PCB board of the display module, and stores the brightness compensation data and the identification information in a target location correspondingly, including: generating verification data for the brightness compensation data; Writing the verification data into the second storage chip; and The brightness compensation data, the verification data of the brightness compensation data, and the identification information are stored in a target location correspondingly.

12. The method according to claim 11, wherein Downloading the brightness compensation data from the target location based on the acquired identification information, and burning the downloaded brightness compensation data into a first storage chip provided on the second PCB board, comprising: downloading the brightness compensation data and verification data of the brightness compensation data from the target location based on the acquired identification information; Reading verification data from the second storage chip; and The read verification data is compared with the downloaded verification data. If they are consistent, the downloaded brightness compensation data is burned into the first storage chip provided on the second PCB board.

13. The method according to claim 11, wherein Storing the brightness compensation data, the verification data of the brightness compensation data, and the identification information in a target location correspondingly includes: Obtaining a simulation diagram for lighting detection based on the brightness compensation data; and The brightness compensation data, the simulation image, and the identification information are stored in a target location correspondingly.

14. The method according to claim 13, further comprising: The identification information of the display panel to be detected is obtained, the simulation diagram is downloaded from the target location based on the obtained identification information, and the display panel to be detected is controlled to display the downloaded simulation diagram to perform lighting detection.

15. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the brightness compensation method according to any one of claims 10 to 14 are implemented.

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