Vcom voltage adaptive adjustment method and system, electronic device, and storage medium

Abstract

The application relates to a VCOM voltage adaptive adjustment method and system, electronic equipment and a storage medium. The VCOM voltage adaptive adjustment method comprises the following steps: initializing a display panel, performing segmentation processing on the display panel, outputting a plurality of to-be-compensated areas and corresponding VCOM initial voltages and adjustment parameters of the to-be-compensated areas; calculating the to-be-compensated areas to obtain image content characteristic values; obtaining a VCOM target voltage according to the image content characteristic values; analyzing a compensation amount of the to-be-compensated areas, and calculating the compensation amount, the adjustment parameters, the VCOM target voltage and the VCOM initial voltage to generate a VCOM real voltage. The scheme provided by the application can actively compensate for the VCOM voltage which has deviated due to the coupling of impedance distribution and image content, and eliminate the display defects such as flicker or image residue of the display.

Description

Technical Field

[0001] This invention relates to the field of display screen technology, and in particular to a VCOM voltage adaptive adjustment method, system, electronic device, and storage medium. Background Technology

[0002] In thin-film transistor liquid crystal displays (TFT-LCDs), the stability of the common electrode voltage (VCOM) is crucial to image quality. Deviations in the VCOM voltage can cause the actual voltage across the pixel storage capacitor to deviate from the ideal value, resulting in inaccurate driving voltage for liquid crystal molecules and causing display defects such as flickering or image retention.

[0003] In related technologies, the impedance distribution of the display panel and the coupling of image content can cause VCOM voltage deviation, which can easily lead to display problems such as flickering or image retention. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a VCOM voltage adaptive adjustment method, system, electronic device and storage medium that can actively compensate for the VCOM voltage that has shifted due to impedance distribution and image content coupling, thereby eliminating display problems such as flickering or image retention.

[0005] The objective of this invention is achieved through the following technical solution: The first aspect of this application provides a VCOM voltage adaptive adjustment method, comprising: initializing a display panel; dividing the display panel into segments; outputting a plurality of regions to be compensated and the initial VCOM voltage and adjustment parameters corresponding to each region to be compensated; calculating the regions to be compensated to obtain image content feature values; obtaining a VCOM target voltage based on the image content feature values; analyzing the compensation amount of the regions to be compensated; and calculating the compensation amount, the adjustment parameters, the VCOM target voltage, and the initial VCOM voltage to generate a true VCOM voltage.

[0006] The calculation of the region to be compensated to obtain image content feature values ​​includes: calculating the average pixel grayscale change, statistical distribution of highly active pixels, and brightness gradient change within the region to be compensated to obtain the image content feature values.

[0007] The analysis of the compensation amount of the region to be compensated includes: using an algorithm to analyze the compensation amount of the region to be compensated.

[0008] The method further includes converting the actual VCOM voltage into PMIC instruction format.

[0009] A second aspect of this application provides a VCOM voltage adaptive adjustment system, comprising: a segmentation module for initializing a display panel, segmenting the display panel, and outputting a plurality of regions to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each region to be compensated; a first calculation module for calculating the regions to be compensated to obtain image content feature values; a second calculation module for obtaining a VCOM target voltage based on the image content feature values; and an analysis module for analyzing the compensation amount of the regions to be compensated, calculating the compensation amount, the adjustment parameters, the VCOM target voltage, and the initial VCOM voltage to generate a true VCOM voltage.

[0010] The first calculation module is also used to calculate the average pixel grayscale change, the statistical distribution of highly active pixels, and the brightness gradient change within the area to be compensated, so as to obtain the image content feature value.

[0011] The analysis module is also used to analyze the compensation amount of the area to be compensated using an algorithm.

[0012] It also includes a conversion module, which is used to convert the actual VCOM voltage into the PMIC instruction format.

[0013] A third aspect of this application provides an electronic device, comprising: Processor; and A memory that stores executable code, which, when executed by the processor, causes the processor to perform the method described above.

[0014] A fourth aspect of this application provides a computer-readable storage medium having executable code stored thereon, which, when executed by a processor of an electronic device, causes the processor to perform the method described above.

[0015] Compared with the prior art, the present invention has at least the following advantages: This application actively compensates for VCOM voltage based on the impedance distribution of each area to be compensated and the image content characteristic values, thereby eliminating display problems such as flickering or image retention on the display. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below.

[0017] Figure 1 This is a flowchart of a VCOM voltage adaptive adjustment method according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating another embodiment of the VCOM voltage adaptive adjustment method according to one embodiment of the present invention. Figure 3 This is a functional block diagram of a VCOM voltage adaptive regulation system according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0018] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0019] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In thin-film transistor liquid crystal displays (TFT-LCDs), the stability of the common electrode voltage Vcom is crucial to image quality. Deviations in the Vcom voltage can cause the actual voltage across the pixel storage capacitor to deviate from the ideal value, resulting in inaccurate driving voltage for liquid crystal molecules and causing display defects such as flickering or image retention.

[0022] The impedance distribution of the display panel and the coupling of image content can cause Vcom voltage deviation, which can easily lead to display problems such as flickering or image retention.

[0023] To address the aforementioned issues, this application provides a VCOM voltage adaptive adjustment method, system, electronic device, and storage medium that can actively compensate for VCOM voltage shifts caused by impedance distribution and image content coupling, thereby eliminating display problems such as flickering or image retention.

[0024] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic flowchart illustrating a VCOM voltage adaptive adjustment method according to an embodiment of this application.

[0026] See Figure 1 A method for adaptive adjustment of VCOM voltage, comprising: Step S101: Initialize the display panel, divide the display panel, and output several areas to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each area to be compensated.

[0027] It should be noted that during the display panel production and testing phase, the adjustment parameters of the display panel are measured or simulated and then burned into the TCON register. Furthermore, since the impedance of each area on the display panel is different, this step will divide the display panel into sections, obtaining the same number of areas to be compensated as the number of VCOM output channels of the power chip, and the initial VCOM voltage corresponding to each area to be compensated.

[0028] Step S102: Calculate the region to be compensated to obtain the image content feature values.

[0029] Step S103: Obtain the VCOM target voltage based on the image content feature values.

[0030] It should be noted that the image data of each area to be compensated is analyzed in real time to obtain the image content feature values.

[0031] Step S104: Analyze the compensation amount of the region to be compensated, calculate the compensation amount, adjustment parameters, VCOM target voltage and VCOM initial voltage, and generate the true VCOM voltage.

[0032] It should be noted that this step calculates the corresponding compensation amount, VCOM target voltage, and adjustment parameters based on the different impedances of each area to be compensated, so as to achieve targeted compensation for each area to be compensated, thereby enabling the entire screen to work normally.

[0033] Figure 2 for Figure 1 A more detailed implementation method for adaptive VCOM voltage regulation includes: Step S201: Initialize the display panel, divide the display panel, and output several areas to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each area to be compensated.

[0034] It should be noted that the adjustment parameters include the attenuation factor and the coupling sensitivity coefficient. The attenuation factor is determined by the equivalent impedance from the region to be compensated to the PMIC output, and the coupling sensitivity coefficient is determined by the coupling capacitance between the data line of the region to be compensated and the common electrode.

[0035] Step S202: Calculate the average pixel grayscale change, statistical distribution of highly active pixels, and brightness gradient change within the area to be compensated to obtain the image content feature value.

[0036] It should be noted that the average pixel grayscale change, the statistical distribution of highly active pixels, and the brightness gradient change are quantized to obtain the average pixel grayscale change vector, the high activity distribution feature vector, and the brightness gradient feature vector, respectively. The average pixel grayscale change vector, the high activity distribution feature vector, and the brightness gradient feature vector are then normalized to obtain the image content feature value.

[0037] Step S203: Obtain the VCOM target voltage based on the image content feature values.

[0038] It should be noted that the average pixel grayscale variation reflects the overall brightness level of the image and determines the pixel average voltage benchmark. The statistical distribution of highly active pixels characterizes local abrupt changes in brightness, and the brightness gradient variation reflects edge / texture complexity, which is related to the pixel voltage fluctuation amplitude. The panel voltage coefficient is obtained, and then calculated using the panel voltage coefficient and image content feature values ​​to obtain the VCOM target voltage. The panel voltage coefficient is obtained from calibration experiments.

[0039] Step S204: Analyze the compensation amount of the region to be compensated using an algorithm, calculate the compensation amount, the adjustment parameters, the target voltage of VCOM, and the initial voltage of VCOM, and generate the true voltage of VCOM.

[0040] It should be noted that the compensation amount includes impedance compensation and coupling compensation, and the specific algorithm is as follows: (1) (2) (3) (4) in, This is the actual voltage of VCOM. The initial voltage of VCOM, For compensation amount, This is the impedance compensation amount. This is the coupling compensation amount. VCOM target voltage, Where k is the attenuation factor and k is the overall proportional coefficient. For coupling sensitive parameters, This is the average pixel grayscale variation vector. TCON is used to calculate the true VCOM voltage using formula 1-4.

[0041] Step S205: Convert the actual VCOM voltage into PMIC instruction format.

[0042] It should be noted that TCON converts the actual VCOM voltage into PMIC commands that the power supply chip can recognize, and sends them through the I2C or SPI interface.

[0043] Corresponding to the aforementioned application function implementation method embodiments, this application also provides a VCOM voltage adaptive regulation system, electronic device, and corresponding embodiments.

[0044] Figure 3 This is a functional block diagram of the VCOM voltage adaptive regulation system shown in the embodiments of this application.

[0045] See Figure 3 A VCOM voltage adaptive adjustment system includes a segmentation module 100, a first calculation module 200, a second calculation module 300, and an analysis module 400. The segmentation module 100 initializes the display panel, segments the display panel, and outputs several regions to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each region. The first calculation module 200 calculates the regions to be compensated to obtain image content feature values. The second calculation module 300 obtains the target VCOM voltage based on the image content feature values. The analysis module 400 analyzes the compensation amount of the regions to be compensated, calculates the compensation amount, adjustment parameters, target VCOM voltage, and initial VCOM voltage, and generates the true VCOM voltage.

[0046] See Figure 3 In one embodiment, the first calculation module 200 is further used to calculate the average pixel grayscale change, the statistical distribution of highly active pixels, and the brightness gradient change within the area to be compensated, so as to obtain the image content feature value.

[0047] See Figure 3 In one embodiment, the analysis module 400 is also used to analyze the compensation amount of the area to be compensated using an algorithm.

[0048] See Figure 3 In one embodiment, a conversion module is also included, which is used to convert the actual VCOM voltage into the PMIC instruction format.

[0049] Regarding the system in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated further here.

[0050] Figure 4 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this application.

[0051] See Figure 4 The electronic device 1000 includes a memory 1010 and a processor 1020.

[0052] The processor 1020 can be a central processing unit (CPU), or it can be an integrated circuit composed of other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be any conventional processor that can run the Linux kernel.

[0053] Memory 1010 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. ROM may store static data or instructions required by processor 1020 or other modules of the computer. Permanent storage devices may be read-write storage devices. Permanent storage devices may be non-volatile storage devices that retain stored instructions and data even when the computer is powered off. In some embodiments, permanent storage devices use mass storage devices (e.g., magnetic or optical disks, flash memory) as permanent storage devices. In other embodiments, permanent storage devices may be removable storage devices (e.g., floppy disks, optical drives). System memory may be a read-write storage device or a volatile read-write storage device, such as dynamic random access memory. System memory may store some or all of the instructions and data required by the processor during operation. Furthermore, memory 1010 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (e.g., DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory 1010 may include a removable storage device that is readable and / or writable, such as a laser disc (CD), a read-only digital multifunction optical disc (e.g., DVD-ROM, dual-layer DVD-ROM), a read-only Blu-ray disc, an ultra-high density optical disc, a flash memory card (e.g., SD card, mini SD card, Micro-SD card, etc.), a magnetic floppy disk, etc. Computer-readable storage media do not contain carrier waves or transient electronic signals transmitted wirelessly or via wired connections.

[0054] The memory 1010 stores executable code, which, when processed by the processor 1020, can cause the processor 1020 to execute part or all of the methods described above.

[0055] Furthermore, the method according to this application can also be implemented as a computer program or computer program product, which includes computer program code instructions for performing some or all of the steps in the method described above.

[0056] Alternatively, this application may be implemented as a computer-readable storage medium (or a non-transitory machine-readable storage medium or a machine-readable storage medium) storing executable code (or computer program or computer instruction code) thereon, which, when executed by a processor of an electronic device (or server, etc.), causes the processor to perform part or all of the steps of the methods described above according to this application.

[0057] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0058] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for adaptive adjustment of VCOM voltage, characterized in that, include: Initialize the display panel, divide the display panel, and output several areas to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each area to be compensated; Calculate the region to be compensated to obtain the image content feature values; The VCOM target voltage is obtained based on the image content feature values; The compensation amount of the region to be compensated is analyzed, and the compensation amount, the adjustment parameter, the target voltage of VCOM, and the initial voltage of VCOM are calculated to generate the true voltage of VCOM.

2. The VCOM voltage adaptive adjustment method according to claim 1, characterized in that, The calculation of the region to be compensated to obtain image content feature values ​​includes: The average pixel grayscale change, statistical distribution of highly active pixels, and brightness gradient change within the area to be compensated are calculated to obtain the image content feature value.

3. The VCOM voltage adaptive adjustment method according to claim 1, characterized in that, The analysis of the compensation amount for the region to be compensated includes: An algorithm is used to analyze the compensation amount of the region to be compensated.

4. The VCOM voltage adaptive adjustment method according to claim 1, characterized in that, The method further includes: Convert the actual VCOM voltage into PMIC instruction format.

5. A VCOM voltage adaptive regulation system, characterized in that, include: The segmentation module is used to initialize the display panel, segment the display panel, and output several areas to be compensated, as well as the initial VCOM voltage and adjustment parameters corresponding to each area to be compensated. The first calculation module is used to calculate the region to be compensated and obtain image content feature values; The second calculation module is used to obtain the VCOM target voltage based on the image content feature values; The analysis module is used to analyze the compensation amount of the region to be compensated, and to calculate the compensation amount, the adjustment parameters, the target voltage of VCOM and the initial voltage of VCOM to generate the true voltage of VCOM.

6. The VCOM voltage adaptive regulation system according to claim 5, characterized in that, The first calculation module is also used to calculate the average pixel grayscale change, the statistical distribution of highly active pixels, and the brightness gradient change within the area to be compensated, so as to obtain the image content feature value.

7. The VCOM voltage adaptive regulation system according to claim 5, characterized in that, The analysis module is also used to analyze the compensation amount of the area to be compensated using an algorithm.

8. The VCOM voltage adaptive regulation system according to claim 5, characterized in that, It also includes a conversion module, which is used to convert the actual VCOM voltage into the PMIC instruction format.

9. An electronic device, characterized in that, include: processor; as well as A memory having executable code stored thereon, which, when executed by the processor, causes the processor to perform the method as described in any one of claims 1-4.

10. A computer-readable storage medium having executable code stored thereon, which, when executed by a processor of an electronic device, causes the processor to perform the method as described in any one of claims 1-4.

Images