Screen correction coefficient control method, control system and display system

Abstract

The embodiment of the invention relates to a screen correction coefficient control method, a screen correction coefficient control system and a display system. The control method comprises the following steps: acquiring a correction coefficient pre-cured in a flash memory of a first chip; wherein each screen panel is provided with the first chip; generating the correction coefficient according to the compensation coefficient of the screen panel and a corresponding time sequence instruction, and solidifying the correction coefficient in a flash memory of the first chip; storing the correction coefficient in a storage device; and reading the correction coefficient from the storage device, and compensating the video information according to a corresponding time sequence instruction. According to the invention, the correction coefficient of the screen is solidified in the first chip of each screen panel, and correction is not needed when the screen panel is replaced, so that the correction process is convenient and rapid.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of display screen correction, and in particular to a method for controlling a screen correction coefficient, a control system, and a display system. Background Art

[0002] LED (Light Emitting Diode) display screens have been widely used in outdoor advertising, outdoor performances, indoor conference halls and other scenarios due to their advantages such as high brightness, good flexibility and strong scalability, and have become the development trend of the display industry in the 21st century.

[0003] The LED display screens currently on the market can be simply summarized into three presentation methods: the first is to use PCB as the substrate and solder the LED lights to the PCB. The second is to use glass as the substrate and solder the LED to the glass drive circuit. The third is to use silicon wafers as the substrate and bond or transfer the LED to a silicon-based drive board.

[0004] The first method is most common in the field of large-screen commercial displays, with screens with LED dot pitch > 1mm accounting for the majority. Its characteristics are mature technology, low design cost, and solutions for large display screens in shopping malls, outdoors, concerts, etc. Its driving method and principle are mostly PM driving methods, which rely on scanning to achieve display (not all images can be displayed at the same time), high power consumption, and simple control principle.

[0005] The second method is the most common in the field of small and medium-sized screen consumption. The screens with LED dot pitch > 0.1mm account for the majority and are commonly used in mobile phones, TVs, computer monitors and other fields. In the past, the most common were glass-based OLED or LCD displays, and miniLEDs used as backlights (only white LEDs are used as background light, commonly known as backlights). Due to the advantages of LEDs such as long life, high brightness, and fast response, more and more businesses are now flocking to glass-based LED displays (RGB LEDs directly display images, commonly known as direct displays). This solution mostly uses the OLED drive method (AM drive), which has a complex control principle, low power consumption, and good display effects (all images can be displayed at the same time).

[0006] The third method is most common in the field of micro-displays, where screens with LED dot pitch <0.1mm account for the majority. This field is relatively cutting-edge, and its characteristics are light and compact, suitable for scenes such as head-mounted displays. AM drive is also the most common drive method.

[0007] The significant difference between passive drive (PM, Passive Matrix) and active drive (AM, Active Matrix) is whether each LED has an independent and controllable drive circuit. PM drive means that all LED lights share a set of drive circuits and use time-sharing multiplexing, so it is impossible to display all images at the same time. AM drive means that each LED has its own independent drive circuit, so the images can be displayed simultaneously without time-sharing multiplexing. In general, the display architectures of PM and AM are very different, and the problems introduced are also different.

[0008] Glass-based AM-driven LED display. Compared with the first method (PCB substrate), the initial investment of glass substrate is higher, but with the increase in sales, the average cost is lower than that of PCB substrate. In terms of performance, PCB substrate is prone to warping and deformation in large-scale applications due to its own heat dissipation limitations, while glass substrate has high thermal conductivity, strong heat dissipation, low thermal expansion rate, high flatness, and lower difficulty in LED transfer than PCB, which can achieve high-density LED welding.

[0009] As for the differences in the driving circuit and the differences in the LED itself, the screen needs to be calibrated to improve the consistency of the screen and enhance the overall viewing experience, which may involve gamma correction, demura, etc. The biggest feature of the correction technology is that it requires a large amount of processing calculations and consumes a lot of storage space.

[0010] The existing solutions follow the AMOLED driving architecture, mostly using the TCON chip + Source chip approach. There is also a GIA circuit on the glass panel. The Display Area contains the driving circuit for each LED lamp, and multiple glass panels are spliced ​​together to form a large screen. Since the glass substrate can be photolithographically processed similarly to silicon-based wafers, TFT circuits can be implemented on the glass to control the LEDs. Since the GIA voltage is usually higher than the operating voltage of the TCON chip, a levelshift chip is used to convert the low-voltage TCON control signal to the control signal of the high-voltage GIA circuit.

[0011] Since there is only one glass substrate, it is impossible to realize a large-size display screen (over 120 inches). By splicing multiple small screens, it is theoretically possible to realize a screen display of infinite size. Most of the above solutions put the correction coefficient of the screen in the flash device on the PCB board of the TCON.

[0012] Regarding the above technical solution, the inventors found that there are at least the following technical problems: In the splicing display scenario, since the correction coefficients are stored in the flash of the PCB board of TCON, when a panel needs to be replaced, it is necessary to re-perform Gamma correction, Demura, temperature compensation, etc., and then store the correction coefficients of various algorithms corresponding to the new panel in the flash of TCON. The correction process is cumbersome and very time-consuming.

[0013] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0014] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0015] The purpose of the embodiments of the present disclosure is to provide a method for controlling screen correction coefficients, a control system and a display system, thereby at least solving the problem that the correction process is cumbersome and time-consuming when a panel needs to be replaced.

[0016] The purpose of the present invention is achieved by the following technical solutions:

[0017] In a first aspect, the present invention provides a method for controlling a screen correction coefficient, the control method comprising:

[0018] Acquire a correction coefficient pre-cured in a flash memory of a first chip; wherein each screen panel is provided with the first chip; generate the correction coefficient according to the compensation coefficient of the screen panel and the corresponding timing instruction and curing it in the flash memory of the first chip;

[0019] Storing the correction coefficient in a storage device;

[0020] The correction coefficient is read from the storage device, and the video information is compensated according to the corresponding timing instruction.

[0021] Optionally, generating the correction coefficient according to the compensation coefficient of the screen panel and the corresponding timing instruction, and solidifying it in the flash memory of the first chip, specifically includes:

[0022] Detecting compensation effect according to the compensation coefficient of the screen panel and the corresponding timing instruction;

[0023] When it is confirmed that the compensation effect reaches the preset effect, the corresponding correction coefficient is solidified in the flash memory of the first chip.

[0024] Optionally, detecting the compensation effect according to the compensation coefficient of the screen panel and the corresponding timing instruction specifically includes:

[0025] Collecting brightness information of the screen panel to obtain screen characteristics of the screen panel;

[0026] The compensation coefficient is generated according to the brightness information and the screen characteristics.

[0027] Optionally, the correction coefficients include: brightness compensation, gamma compensation, temperature compensation and voltage drop compensation.

[0028] In a second aspect, the present invention further provides a control system for a screen correction coefficient, the control system comprising:

[0029] A plurality of screen panels, each of which is provided with the first chip; wherein a flash memory is provided in the first chip, and the correction coefficient is solidified in the flash memory;

[0030] A plurality of screen panels, each of which is provided with the first chip; wherein a flash memory is provided in the first chip, and the flash memory is solidified with a correction coefficient; wherein the correction coefficient is generated according to the compensation coefficient of the screen panel and the corresponding timing instruction;

[0031] a storage device, the storage device being used to receive and store the correction coefficient;

[0032] A timing control device is used to read the correction coefficient from the storage device and compensate the video information according to the corresponding timing instruction.

[0033] Optionally, the first chip is a thin film chip provided with a flash memory.

[0034] Optionally, the first chip is a source chip provided with a flash memory, and the source chip is arranged in a thin film chip.

[0035] Optionally, the storage device is DDR storage.

[0036] Optionally, the screen panel is a splicable glass-based panel.

[0037] In a third aspect, the present invention provides a display system, comprising a control system for a screen correction coefficient as described in any one of the above embodiments.

[0038] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0039] In the embodiments of the present disclosure, by fixing the correction coefficient of the screen in the first chip of each screen panel, no correction is required when the screen panel is replaced, thereby making the correction process convenient and quick.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0042] Figure 1 A schematic flow chart showing a method for controlling a screen correction coefficient in an exemplary embodiment of the present disclosure;

[0043] Figure 2 A schematic diagram showing a driving architecture of a single glass substrate in the related art is shown;

[0044] Figure 3 A schematic diagram showing a driving architecture of multiple screen panels in the related art;

[0045] Figure 4 A schematic diagram showing a flow chart of screen correction in the related art;

[0046] Figure 5 A schematic diagram showing a practical application flow of a method for controlling a screen correction coefficient in an exemplary embodiment of the present disclosure;

[0047] Figure 6 A schematic diagram showing a flow chart of a curing correction coefficient in an exemplary embodiment of the present disclosure;

[0048] Figure 7 A schematic diagram showing a flow chart of confirming compensation effect in an exemplary embodiment of the present disclosure;

[0049] Figure 8 A schematic diagram showing a topological structure in which the flash is arranged on the COF in an exemplary embodiment of the present disclosure;

[0050] Fig. 9 A schematic diagram of a topological structure in which the flash is arranged in the SourceIC in an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0052] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0053] In this exemplary embodiment, a method for controlling a screen correction coefficient is first provided. Figure 1 As shown in, including:

[0054] Step S101: obtaining a correction coefficient pre-fixed in the flash memory of the first chip.

[0055] Step S102: storing the correction coefficient in a storage device.

[0056] Step S103: read the correction coefficient from the storage device, and compensate the video information according to the corresponding timing instruction.

[0057] Each screen panel is provided with a first chip, and a correction coefficient is generated according to the compensation coefficient of the screen panel and the corresponding timing instruction, and is solidified in the flash memory of the first chip.

[0058] It should be understood that each screen panel can be spliced, and multiple screen panels can be spliced ​​to form a whole display screen. Specifically, the screen panel can be an LED light panel.

[0059] It is also important to understand that reference Figure 2 As shown, Figure 2 This is a driving architecture that uses a glass substrate as the entire display screen in the prior art. Figure 3 As shown, Figure 3 The present invention is a driving architecture for splicing multiple screen panels into a whole display screen in the prior art. Figure 3 The driver architecture is only Figure 2 The driver architecture is expanded to place the screen correction coefficient in the flash device on the TCON PCB board. Figure 4 As shown, Figure 4 For the existing technology Figure 3The implementation process corresponding to the driver architecture. Since the correction coefficients are stored in the flash of the TCON PCB board, when a panel needs to be replaced, it is necessary to re-perform Gamma correction, Demura, temperature compensation, etc., and then store the correction coefficients of various algorithms corresponding to the new panel in the flash of TCON. The correction process is cumbersome and very time-consuming.

[0060] It is also important to understand that when replacing the screen panel, the glass panel, COF, and FPC will be replaced together. Therefore, it is more reasonable to put the flash on the COF. Before the screen leaves the factory, the parameters are stored on the COF flash after performing demura, gamma correction, temperature compensation and other algorithms. Therefore, once the screen needs to be replaced, the new panel has stored the correction coefficients related to the screen characteristics in the COF flash, and no correction is required during the application process, making the entire replacement process convenient and quick.

[0061] It is also important to understand that reference Figure 5 As shown, the screen panel is calibrated, and the correction coefficient is fixed in the flash of COF after the calibration is completed. In this way, when replacing or actually applying, TCON obtains the correction coefficient from SourceIC, and SourceIC reads the correction coefficient in the flash and sends it to TCON. TCON stores the correction coefficient in DDR high-speed storage. When video is input, TCON compensates the display of video content in real time through the correction coefficient stored in DDR high-speed storage.

[0062] It is also necessary to understand that SourceIC needs to add interfaces to access Flash, such as SPI, I2C, etc. The interaction between SourceIC and TCON requires adding protocols to control the correct reading and writing of the correction coefficients to ensure that TCON can reasonably use the correct parameters. TCON needs to control multiple SourceICs at the same time, correctly grasp the power-on process, and also needs to manage the correction coefficients in partitions.

[0063] According to the above screen correction coefficient control method, by fixing the screen correction coefficient in the first chip of each screen panel, no calibration is required when the screen panel is replaced, thereby making the calibration process convenient and quick.

[0064] Next, we will refer to Figures 1 to 7 Each step of the above-mentioned method for controlling the screen correction coefficient in this exemplary embodiment is described in more detail.

[0065] refer to Figure 6 As shown, before step S101, a correction coefficient is generated according to the compensation coefficient of the screen panel and the corresponding timing instruction, and is solidified in the flash memory of the first chip, specifically including:

[0066] Step S601: detecting the compensation effect according to the compensation coefficient of the screen panel and the corresponding timing instruction.

[0067] Step S602: When it is confirmed that the compensation effect reaches the preset effect, the corresponding correction coefficient is solidified in the flash memory of the first chip.

[0068] It is important to understand that reference Figure 5 As shown, the preset effect is to confirm that the compensation effect is good and can be displayed normally and consistently. When it is confirmed that the compensation effect reaches the preset effect, it is equivalent to completing the calibration of the screen panel, recording the calibration coefficient of this state, and solidifying it in the flash memory of the first chip.

[0069] refer to Figure 7 As shown, step S601 specifically includes:

[0070] Step S701: Collect brightness information of the screen panel to obtain screen characteristics of the screen panel.

[0071] Step S702: Generate compensation coefficients according to brightness information and screen characteristics.

[0072] It is important to understand that reference Figure 5 As shown, the screen panel is turned on, and the camera is used to collect the brightness information of the screen panel point by point. The screen characteristics are calculated by the host computer. A temporary compensation coefficient is generated based on the brightness information and the screen characteristics, and the temporary compensation coefficient is sent to SourceIC through TCON, and the temporary compensation coefficient is applied to verify the compensation effect. When it is confirmed that the compensation effect reaches the preset effect, the compensation coefficient at this time is solidified as the correction coefficient.

[0073] Optionally, the correction coefficients include: brightness compensation, gamma compensation, temperature compensation and voltage drop compensation. It should be understood that emura, gamma, temperature compensation, IRdrop compensation, etc. are coefficients that optimize the screen display effect. When confirming the compensation effect, the four aspects of brightness compensation, gamma compensation, temperature compensation and voltage drop compensation can be verified simultaneously to determine the final correction coefficient to be solidified.

[0074] Furthermore, in this exemplary embodiment, a control system for screen correction coefficients is also provided, and the control system includes:

[0075] Multiple screen panels, each screen panel is provided with a first chip; wherein the first chip is provided with a flash memory, and the flash memory is solidified with a correction coefficient; wherein the correction coefficient is generated according to the compensation coefficient of the screen panel and the corresponding timing instruction.

[0076] The storage device is used to receive and store the correction coefficient.

[0077] The timing control device is used to read the correction coefficient from the storage device and compensate the video information according to the corresponding timing instruction.

[0078] It is important to understand that the parameters are stored in the COF flash. Once the screen needs to be replaced, the COF flash of the new panel stores the correction coefficients related to the screen characteristics, so no correction is required during the application process, which is convenient and quick.

[0079] It should also be understood that the storage device may be DDR storage, also known as DDR high-speed storage. The screen panel is a splicable glass-based panel.

[0080] refer to Figure 8 As shown, the first chip is a thin film chip provided with a flash memory. It should be understood that the thin film chip is a COF, the SourceIC and the flash are both provided in the COF, and the SourceIC and the flash are connected in the COF.

[0081] refer to Fig. 9 As shown, the first chip is a source chip with flash memory, and the source chip is arranged in the thin film chip. It should be understood that the flash is arranged in the SourceIC, and the SourceIC with flash is arranged in the COF. The SourceIC directly reads the solidified correction coefficient through its own flash. Figure 8 In terms of the topological structure, bonding flash chips on COF has high requirements and requires corresponding packaged flash chips to be realized. At present, there are relatively few flash chips packaged in COF, so Fig. 9 The topology of the chip is a flash memory (or other types of NVM storage) encapsulated inside the source chip, and NVM storage is integrated inside a chip to replace the external storage chip. The advantage of this is that it is not limited by COF packaging, and one chip can complete the above functions.

[0082] Furthermore, in this example implementation, a display system is also provided, including: the display system includes a control system of any screen correction coefficient in the above implementation.

[0083] The specific method of the display system has been described in detail in the embodiment of the control system of the screen correction coefficient, and will not be elaborated here.

[0084] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the present disclosure, the features and functions of two or more modules or units described above can be concretized in one module or unit. Conversely, the features and functions of a module or unit described above can be further divided into multiple modules or units for concretization. The components displayed as modules or units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed scheme. Those of ordinary skill in the art can understand and implement it without paying creative work.

[0085] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A method for controlling a screen correction coefficient, characterized in that: The control method comprises: Acquire a correction coefficient pre-cured in the flash memory of the first chip; wherein each screen panel is provided with the first chip; generate the correction coefficient according to the compensation coefficient of the screen panel and the corresponding timing instruction, and curing it in the flash memory of the first chip; Storing the correction coefficient in a storage device; The correction coefficient is read from the storage device, and the video information is compensated according to the corresponding timing instruction.

2. The control method according to claim 1, characterized in that: The generating the correction coefficient according to the compensation coefficient of the screen panel and the corresponding timing instruction and solidifying it in the flash memory of the first chip specifically includes: Detecting compensation effect according to the compensation coefficient of the screen panel and the corresponding timing instruction; When it is confirmed that the compensation effect reaches the preset effect, the corresponding correction coefficient is solidified in the flash memory of the first chip.

3. The control method according to claim 2, characterized in that: The detecting the compensation effect according to the compensation coefficient of the screen panel and the corresponding timing instruction specifically includes: Collecting brightness information of the screen panel to obtain screen characteristics of the screen panel; The compensation coefficient is generated according to the brightness information and the screen characteristics.

4. The control method according to any one of claims 1 to 3, characterized in that: The correction coefficients include: brightness compensation, gamma compensation, temperature compensation and voltage drop compensation.

5. A control system for screen correction coefficients, characterized in that: The control system comprises: A plurality of screen panels, each of which is provided with the first chip; wherein a flash memory is provided in the first chip, and the flash memory is solidified with a correction coefficient; wherein the correction coefficient is generated according to the compensation coefficient of the screen panel and the corresponding timing instruction; a storage device, the storage device being used to receive and store the correction coefficient; A timing control device is used to read the correction coefficient from the storage device and compensate the video information according to the corresponding timing instruction.

6. The control system according to claim 5, characterized in that: The first chip is a thin film chip provided with a flash memory.

7. The control system according to claim 5, characterized in that: The first chip is a source chip provided with a flash memory, and the source chip is arranged in a thin film chip.

8. The control system according to any one of claims 5 to 7, characterized in that: The storage device is DDR storage.

9. The control system according to claim 8, characterized in that: The screen panel is a splicable glass-based panel.

10. A display system, characterized in that: The display system comprises the control system of the screen correction coefficient according to any one of claims 5-9.

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