Brightness compensation method and device for display panel, driver chip and display device

Abstract

This application provides a brightness compensation method and apparatus for a display panel, a driver chip, and a display device. The brightness compensation method includes: acquiring target image data; comparing the target image data with currently stored image data to determine whether the target image data is a duplicate recording; and recording the target image data when it is determined to be a non-duplicate recording. This brightness compensation method can extend the DBI compensation lifespan of the storage module and improve the accuracy of brightness compensation.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a brightness compensation method and apparatus for a display panel, a driver chip and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are self-emissive display devices. Their red, green, and blue (R, G, B) light-emitting components experience brightness decay over time, leading to a shorter screen lifespan. Because the R, G, and B colors emit light independently and decay at different rates, prolonged use can easily result in screen ghosting.

[0003] To address this issue, one traditional approach is to use Digital Brightness Improvement (DBI) algorithms for brightness compensation.

[0004] However, the DBI algorithm needs to monitor and store screen information when the screen is on, and this data is written to an external flash memory chip (Flash IC). However, the maximum number of write cycles for a Flash IC is approximately 100,000. To achieve the compensation lifespan, the interval between writes to the flash memory must be extended. However, for usage scenarios with rapid screen updates, this leads to a decrease in the lifespan compensation effect; conversely, if the write interval is shortened to match the screen refresh rate, the compensation lifespan will be significantly shortened.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] Based on this, embodiments of this application provide a brightness compensation method and apparatus for a display panel, a driver chip and a display device, which can extend the DBI compensation lifespan of the storage module and improve the accuracy of brightness compensation.

[0007] According to some embodiments, this application provides a brightness compensation method for a display panel, including:

[0008] Acquire target image data;

[0009] The target image data is compared with the currently stored image data to determine whether the target image data is a duplicate recording.

[0010] When the target screen data is determined to be non-repeating screen data, the target screen data is recorded.

[0011] In some embodiments, acquiring the target image data includes:

[0012] The target image data is acquired at a preset time interval.

[0013] In some embodiments, the brightness compensation method further includes:

[0014] When the target screen data is determined to be duplicate screen data, the count of the number of times the duplicate screen data is input is incremented by 1.

[0015] In some embodiments, the duration of the preset time interval is determined based on the storage space size for storing the number of repetitions of the repeated image data.

[0016] In some embodiments, the preset time interval is greater than or equal to 60 seconds.

[0017] According to some embodiments, this application also provides a brightness compensation device for a display panel, applied to a display device, for implementing the brightness compensation method for the display panel provided in the above embodiments; the brightness compensation device includes:

[0018] The reading module is used to acquire target screen data;

[0019] The judgment module is used to compare the target image data with the currently stored image data to determine whether the target image data is a duplicate recorded image data.

[0020] The storage module is configured to record the target screen data when the target screen data is determined to be non-repeating screen data.

[0021] In some embodiments, the storage module includes an external flash memory integrated circuit.

[0022] In some embodiments, the storage space capacity of the storage module for recording the target image data is not less than 6 bits.

[0023] In some embodiments, the storage module is used to store the number of times the repeated screen data is input;

[0024] The storage module is also configured to increment the count of the number of times the target screen data is input when the target screen data is determined to be duplicate screen data.

[0025] According to some embodiments, this application also provides a driver chip, including:

[0026] processor;

[0027] A memory in which executable instructions of the processor are stored;

[0028] The processor is configured to execute the steps of the brightness compensation method for the display panel provided in the above embodiments by executing the executable instructions.

[0029] According to some embodiments, this application also provides a display device, including a display panel; and a brightness compensation device for the display panel provided in the above embodiments; the brightness compensation device is connected to the display panel and is used to perform brightness compensation on the display panel.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application.

[0031] The embodiments of this application may have, or at least have, the following advantages:

[0032] In this embodiment, after acquiring the target screen data, a process is added to compare the target screen data with the currently stored screen data. By comparing the target screen data and the currently stored screen data, it is first determined whether the target screen data is a duplicate recording. When the target screen data is determined to be a non-duplicate recording, it indicates that the recorded screen data has changed, and only then is the target screen data recorded. In this way, the duplicate storage of the same screen data can be avoided, thereby effectively reducing unnecessary write operations.

[0033] This application embodiment reduces unnecessary write operations, enabling more efficient management and recording of brightness compensation-related image data with a limited number of write cycles, thereby helping to extend the DBI compensation lifespan of the storage module. Furthermore, since this application embodiment ensures that each stored image data is either new or modified image data, it avoids poor brightness compensation effects due to the use of outdated or duplicate data, thus also contributing to improved brightness compensation accuracy.

[0034] Other advantages, objectives, and features of this application will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from practice of this application. The objectives and other advantages of this application can be realized and obtained through the following description. Attached Figure Description

[0035] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0036] Figure 1A schematic flowchart illustrating a brightness compensation method provided in some embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the overall process of performing brightness compensation using the brightness compensation method provided in some embodiments of this application;

[0038] Figure 3 This is a schematic diagram of the structure of a brightness compensation device provided in some embodiments of this application;

[0039] Figure 4 A schematic diagram of a driver chip provided in some embodiments of this application;

[0040] Figure 5 This is a schematic diagram showing the connection between the driver chip and the display panel in some embodiments of this application;

[0041] Figure 6 This is a schematic diagram of the structure of a display device provided in some embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Brightness compensation device; 101. Reading module; 102. Judgment module; 103. Storage module; 10. Display device; 11. Driver chip; 12. Display panel. Detailed Implementation

[0044] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] Electronic or electrical devices and / or any other related devices or components (e.g., display devices including a display panel and a display panel driver, wherein the display panel driver further includes a drive controller, a gate driver, a gamma reference voltage generator, a data driver, and a transmit driver) according to embodiments of the concepts described herein can be implemented using any suitable hardware, firmware (e.g., application-specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, various components of these devices may be formed on an integrated circuit (IC) chip or on a separate IC chip. Additionally, various components of these devices may be implemented on a flexible printed circuit film, a tape-on-a-package (TCP), a printed circuit board (PCB), or formed on a substrate. Furthermore, various components of these devices may be processes or threads running on one or more processors in one or more computing devices to execute computer program instructions and interact with other system components to perform the various functions described herein. Computer program instructions are stored in memory, which may be implemented in a computing device using standard storage devices such as random access memory (RAM). Computer program instructions may also be stored in other non-transitory computer-readable media such as CD-ROMs, flash drives, etc. Furthermore, those skilled in the art will recognize that the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a particular computing device may be distributed across one or more other computing devices, without departing from the spirit and scope of the exemplary embodiments of the present application.

[0047] While exemplary embodiments of the display module and the display device including the display module have been specifically described herein, many modifications and variations will be apparent to those skilled in the art. Therefore, it will be understood that the display module and the display device including the display module, constructed according to the principles of this application, may be implemented in ways other than those specifically described herein. This application is also defined in the claims and their equivalents.

[0048] As described in the background section, Digital Brightness Improvement (DBI) algorithms need to monitor and store screen information when the screen is on, and this data is written to an external flash memory chip (FlashIC). However, the maximum number of write cycles for a Flash IC is approximately 100,000. To achieve the required compensation lifespan, the interval between writes to the flash memory must be extended. However, for usage scenarios with rapid screen updates, this leads to a decrease in the lifespan compensation effect; conversely, if the write interval is shortened to match the screen refresh rate, the compensation lifespan will be significantly reduced.

[0049] For the reasons mentioned above, this application provides a brightness compensation method and apparatus for a display panel, a driver chip, and a display device, which can extend the DBI compensation lifespan of the storage module and improve the accuracy of brightness compensation. Details will be described in subsequent embodiments.

[0050] This application provides a brightness compensation method for a display panel. Please refer to [link / reference]. Figure 1 The brightness compensation method may specifically include the following steps S100 to S300:

[0051] S100: Acquire target image data.

[0052] S200: Compare the target image data with the currently stored image data to determine whether the target image data is a duplicate recording.

[0053] S300: When the target screen data is determined to be non-repeating screen data, record the target screen data.

[0054] In the aforementioned brightness compensation method, after acquiring the target image data, compared to traditional brightness compensation methods, the brightness compensation method provided in this application adds a process of comparing the target image data with currently stored image data. By comparing the target image data and the currently stored image data, it is first determined whether the target image data is duplicated. When the target image data is determined to be non-duplicated, it indicates that the recorded image data has changed, and only then is the target image data recorded. In this way, duplicate storage of the same image data can be avoided, thereby effectively reducing unnecessary write operations.

[0055] The brightness compensation method described above reduces unnecessary write operations, enabling more efficient management and recording of brightness compensation-related image data within a limited number of write cycles, thereby helping to extend the DBI compensation lifespan of the storage module. Furthermore, since this method ensures that each stored image data is either new or modified, it avoids poor brightness compensation results due to the use of outdated or duplicate data, thus also contributing to improved brightness compensation accuracy.

[0056] To more clearly illustrate the brightness compensation method provided in the embodiments of this application, please refer to the following... Figure 2 Understand some embodiments of this application.

[0057] Regarding step S100, the process of acquiring target image data can be, for example... Figure 2As shown: The application processor (AP) transmits the target screen data to the driver chip (e.g., the display driver chip DDIC) through an interface, and the driver chip obtains the target screen data.

[0058] It should be noted that, in the embodiments of this application, the target screen data may specifically include: the screen data to be displayed.

[0059] In some possible embodiments, the process of acquiring target image data may specifically include: acquiring target image data at a preset time interval.

[0060] In the aforementioned brightness compensation method, by acquiring target screen data at preset time intervals, real-time monitoring of the display panel content can be achieved, allowing for timely capture of brightness changes and improving the response speed of brightness compensation. Regularly acquiring screen data ensures that subsequent brightness compensation processes can be dynamically adjusted based on more up-to-date data, thereby calculating compensation values ​​more accurately and improving the display effect. By setting reasonable time intervals, this brightness compensation method can continuously update compensation values ​​without introducing significant delays, thus enhancing the user experience. Furthermore, while optimizing brightness compensation, it also leads to better energy management, which helps extend the device's lifespan.

[0061] This application does not specifically limit the duration of the preset time interval involved in the foregoing steps. In some possible embodiments, the duration of the preset time interval may be determined based on the storage space size for storing the number of repetitions of the repeated image data.

[0062] In some possible embodiments, the preset time interval can be configured to be greater than or equal to 60 seconds. Exemplarily, the preset time interval can be configured to 60 seconds, 120 seconds, 240 seconds, or 1 hour, etc., but is not limited thereto.

[0063] For step S200, for example, the judgment result obtained from judging whether the target screen data is duplicate screen data can be recorded in the driver chip (e.g., Figure 2 The display driver chip shown is DDIC, but it is not limited to this.

[0064] In some possible embodiments, step S200 compares the target screen data with the currently stored screen data. When the target screen data is determined to be duplicated screen data, the count of the number of times the duplicate screen data was entered can be incremented by 1.

[0065] In the brightness compensation method described above, the target image data is compared with the currently stored image data. If they match, it is considered repeated image data, and the input count of the repeated image data is incremented by 1. For example, the input count information of the repeated image data can be stored in the driver chip.

[0066] The above-described brightness compensation method for DBI algorithm brightness compensation involves an additional step of comparing the target image data with currently stored image data. Therefore, when calculating the DBI algorithm compensation period, it is necessary to consider both the target image data and the number of times the image is repeated. Details will be illustrated later.

[0067] Regarding step S300, in this embodiment of the application, the recording of target screen data involved in step S300 may specifically include: writing the target screen data into a storage module. For example... Figure 2 As shown, the storage module can be, for example, a Flash IC, but is not limited to this.

[0068] The following example illustrates the technical effect of extending the DBI algorithm compensation period in the embodiments of this application, with the upper limit of the number of writes of the driver chip (e.g., the display driver chip DDIC) being 100,000, the preset time interval for the driver chip to record screen data being configured to be 60 seconds (that is, the driver chip records screen data once every 60 seconds), and the product (e.g., the display device) being used for 4 hours a day.

[0069] Using traditional brightness compensation methods, the estimated compensation lifespan of the DBI algorithm is approximately:

[0070] 100000*60 / (3600*4*365)≈1.14 (years).

[0071] Assume that the storage space capacity of the driver chip's storage module for recording target image data is 6 bits (that is, each driver chip can support the maximum number of times the monitored image data can be repeated).

[0072] Using the brightness compensation method provided in this application, the expected compensation lifespan of the DBI algorithm is approximately:

[0073] 100000*60*64 / (3600*4*365)≈72.96 (years).

[0074] It can be seen that the brightness compensation method provided in this application embodiment can effectively extend the DBI compensation lifespan of the storage module.

[0075] For the driver chip, the space of the storage module in the driver chip can be adaptively increased to facilitate the function of recording the number of times the image data is repeated. The storage module may include a random access memory unit (RAM) and / or a cache memory unit 6202, but is not limited to these.

[0076] It is understandable that the size of the storage module is related to the space allocated for the number of repetitions. Let's take the example of a driver chip with a maximum write count of 100,000 times and a storage capacity of 6 bits in the driver chip's storage module for recording target image data.

[0077] At this point, the space required in the storage module to record the number of times the image data is repeated is approximately:

[0078] 100000*6bit=600000bit≈0.573Mbit.

[0079] Please continue reading. Figure 2 It is understood that the brightness compensation method provided in this application can determine the required brightness adjustment and calculate the compensation value by reading and analyzing stored image data, identifying brightness changes and content features in the image data, and thus determining the required brightness adjustment. Furthermore, the target image data and the corresponding compensation value can be transmitted to the display panel to complete the DBI algorithm compensation.

[0080] Based on the same inventive concept, this application also provides a brightness compensation device for a display panel. This brightness compensation device can be applied to a display device to implement the brightness compensation method described in the above embodiments. The solution provided by this brightness compensation device is similar to the implementation scheme described in the above brightness compensation method; therefore, the specific limitations in one or more brightness compensation device embodiments provided below can be found in the limitations of the brightness compensation method described above, and will not be repeated here.

[0081] Please see Figure 3 The brightness compensation device 100 may specifically include a reading module 101, a judgment module 102, and a storage module 103.

[0082] The reading module 101 can be used to acquire target screen data; the judging module 102 can be used to compare the target screen data with the currently stored screen data to determine whether the target screen data is a duplicate recorded screen data; the storage module 103 can be configured to record the target screen data when the target screen data is determined to be a non-duplicate recorded screen data.

[0083] In the aforementioned brightness compensation device, after the reading module 101 acquires the target image data, the judging module 102 compares the target image data with the currently stored image data. By comparing the target image data and the currently stored image data, it is first determined whether the target image data is a duplicate recording. When the target image data is determined to be a non-duplicate recording, it indicates that the recorded image data has changed, and only then does the storage module 103 record the target image data. In this way, duplicate storage of the same image data can be avoided, thereby effectively reducing unnecessary write operations.

[0084] The aforementioned brightness compensation device reduces unnecessary write operations, enabling more efficient management and recording of brightness compensation-related image data within a limited number of write cycles, thereby helping to extend the DBI compensation lifespan of the storage module. Furthermore, since the aforementioned brightness compensation device ensures that each stored image data is either new or modified image data, it avoids poor brightness compensation effects due to the use of outdated or duplicate data, thus also contributing to improved brightness compensation accuracy.

[0085] This application does not specifically limit the form of the storage module 103 in the brightness compensation device 100. In some possible embodiments, the storage module 103 may include an external flash memory integrated circuit (Flash IC, also known as a flash memory chip). However, it is not limited to this.

[0086] In some possible embodiments, the storage space capacity in storage module 103 for recording target image data is not less than 6 bits.

[0087] Meanwhile, in some possible embodiments, the storage module 103 can also be used to store the number of times the repeated screen data is input.

[0088] In the aforementioned brightness compensation device, the storage space capacity is configured to be no less than 6 bits, which ensures that the storage module 103 can record a large number of repeated image data inputs, thereby improving the integrity and accuracy of the data. It is understood that with sufficient data support, brightness compensation can be performed more stably, thereby reducing judgment errors or unreasonable brightness compensation caused by insufficient data, and contributing to improved stability and reliability of brightness compensation.

[0089] In the above embodiments, the storage module 103 can also be configured to increment the count of the number of times the target screen data is input when the target screen data is determined to be repeatedly recorded screen data.

[0090] By using the aforementioned brightness compensation device 100 for DBI algorithm brightness compensation, the addition of a comparison step between the target image data and the currently stored image data allows for the calculation of the DBI algorithm compensation period by combining the target image data and the image repetition count information.

[0091] Each module in the brightness compensation device 100 described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0092] It is understood that the brightness compensation device 100 of this application may also include other existing functional modules that support the operation of the brightness compensation device 100. Figure 3 The brightness compensation device 100 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0093] It should be noted that the brightness compensation devices in the embodiments of this application can all be used to implement the corresponding brightness compensation methods. Therefore, the technical features between the method embodiments and the device embodiments can be substituted and supplemented for each other without conflict, so that those skilled in the art can understand the technical content of this application.

[0094] Please see Figure 4 Based on the same inventive concept, this application also provides a driver chip 11. For example... Figure 5 As shown, the driver chip 11 can be connected to the display panel 12 to control the display panel 12 to perform display.

[0095] The driver chip 11 may specifically include a processor; a memory storing executable instructions of the processor; wherein the processor is configured to perform the steps of the brightness compensation method provided in the foregoing embodiments by executing the executable instructions.

[0096] Those skilled in the art will understand that the driver chip 11 involved in the embodiments of this application may specifically include a display driver IC (DDIC).

[0097] Please see Figure 6 Based on the same inventive concept, this application also provides a display device 10. Specifically, the display device 10 may include a display panel 12 and a brightness compensation device for the display panel 12 provided in the above embodiments, for example... Figure 3 The brightness compensation device 100 shown is connected to the display panel 12 and is used to perform brightness compensation on the display panel 12.

[0098] It is understood that the display device 10 in the embodiments of this application can be any product or component with display function, such as OLED display device, QLED display device, electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, wearable device, Internet of Things device, etc., and the embodiments disclosed in this application do not limit this.

[0099] The display device in this application embodiment includes the brightness compensation device for the display panel provided in the foregoing embodiment. Therefore, the display device can also achieve the technical effects that the aforementioned brightness compensation device can achieve, and will not be described in detail here.

[0100] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A brightness compensation method for a display panel, characterized in that, include: Acquire target image data; The target image data is compared with the currently stored image data to determine whether the target image data is a duplicate recording. When the target screen data is determined to be non-repeated screen data, the target screen data is recorded; By reading and analyzing the stored image data, the brightness changes and content features in the image data are identified, the required brightness adjustment is determined, and the compensation value is calculated.

2. The brightness compensation method for a display panel according to claim 1, characterized in that, The acquisition of target image data includes: The target image data is acquired at a preset time interval.

3. The brightness compensation method for a display panel according to claim 2, characterized in that, The brightness compensation method further includes: When the target screen data is determined to be duplicate screen data, the count of the number of times the duplicate screen data is input is incremented by 1.

4. The brightness compensation method for a display panel according to claim 3, characterized in that, The duration of the preset time interval is determined based on the storage space size for storing the number of repetitions of the repeated image data.

5. The brightness compensation method for a display panel according to claim 2, characterized in that, The preset time interval is greater than or equal to 60 seconds.

6. A brightness compensation device for a display panel, characterized in that, Applied to a display device, for implementing the brightness compensation method for the display panel according to any one of claims 1 to 5; the brightness compensation device includes: The reading module is used to acquire target screen data; The judgment module is used to compare the target image data with the currently stored image data to determine whether the target image data is a duplicate recorded image data. The storage module is configured to: when the target image data is determined to be non-repeating image data, record the target image data, and by reading and analyzing the stored image data, identify brightness changes and content features in the image data, determine the required brightness adjustment, and calculate the compensation value.

7. The brightness compensation device for the display panel according to claim 6, characterized in that, The storage module includes an external flash memory integrated circuit.

8. The brightness compensation device for the display panel according to claim 6, characterized in that, The storage module has a storage space capacity of no less than 6 bits for recording the target image data.

9. The brightness compensation device for the display panel according to claim 6, characterized in that, The storage module is used to store the number of times the repeated screen data is input; The storage module is also configured to increment the count of the number of times the target screen data is input when the target screen data is determined to be duplicate screen data.

10. A driver chip, characterized in that, include: processor; A memory in which executable instructions of the processor are stored; The processor is configured to perform the steps of the brightness compensation method for the display panel according to any one of claims 1 to 5 by executing the executable instructions.

11. A display device, characterized in that, Including display panels; and The brightness compensation device for a display panel as described in any one of claims 6 to 9; the brightness compensation device is connected to the display panel and is used to perform brightness compensation on the display panel.

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