Mini LED backlight module brightness compensation methods, systems, electronic devices, and storage media
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-21
- Publication Date
- 2026-08-14
AI Technical Summary
[0003]在相关技术中，Mini LED为负温度系数半导体器件，长时间工作后，其PN结因电能非完全转化为光能而持续发热，随着温度升高时，载流子浓度增加，进而导致PN结的电阻率下降，造成Mini LED发光效率也随着下降，对显示画面形成光衰现象，影响画面观感
本申请在Mini LED背光模组的设置采样工序，实时获取过第二驱动电流，根据预设转换系数输出第一驱动电流，将第二驱动电流值与第一驱动电流值对比，输出电流补偿值；根据电流补偿值控制驱动芯片的电流输出，确保各分区电流始终保持一致性，从而解决背光模组因长时间工作下，产生的温升效应导致Mini LED亮度衰减的现象，避免光衰影响画面观感。
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Figure CN122575295A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of backlight module technology, and in particular to a method, system, electronic device and storage medium for brightness compensation of a Mini LED backlight module. Background Technology
[0002] Mini LED achieves precise control of the backlight module through LED driver chips and PWM local dimming technology, which can split the backlight into independent control of multiple areas, thereby significantly improving the contrast of the picture and reducing the halo effect.
[0003] In related technologies, Mini LED is a negative temperature coefficient semiconductor device. After working for a long time, its PN junction continues to heat up because electrical energy is not completely converted into light energy. As the temperature rises, the carrier concentration increases, which in turn leads to a decrease in the resistivity of the PN junction, causing the luminous efficiency of Mini LED to decrease as well. This results in light decay of the display screen and affects the viewing experience. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, system, electronic device and storage medium for brightness compensation of Mini LED backlight module, which can solve the problem of brightness decay of Mini LED caused by temperature rise effect of backlight module under long-term operation, and avoid light decay affecting the picture quality.
[0005] The objective of this invention is achieved through the following technical solution: The first aspect of this application provides a method for brightness compensation of a Mini LED backlight module, comprising: scanning a backlight area, dividing the backlight area into several regions to be compensated; performing calculation processing on each region to be compensated to obtain several region brightness values; calculating the brightness values of each region to obtain a backlight brightness value; reading a preset current conversion coefficient, generating a first driving current based on the preset current conversion coefficient and the backlight brightness value; acquiring a second driving current, comparing the second driving current with the first driving current, outputting a current compensation value, and applying a gain to the corresponding region to be compensated based on the current compensation value.
[0006] The acquisition of the second drive current includes: sampling the second drive current through analog-to-digital conversion (ADC).
[0007] A second aspect of this application provides a Mini LED backlight module brightness compensation system, comprising: a scanning module for scanning a backlight area, dividing the backlight area, and outputting several compensation zones; a calculation module for performing calculation processing on the compensation zones respectively to obtain several area brightness values; a calculation module for calculating the brightness values of each area to obtain a backlight brightness value; a reading module for reading a preset current conversion coefficient, generating a first driving current based on the preset current conversion coefficient and the backlight brightness value; and a gain module for acquiring a second driving current, comparing the second driving current with the first driving current, outputting a current compensation value, and applying a gain to the corresponding compensation zone.
[0008] The gain module is also used to sample the second drive current through ADC analog-to-digital conversion.
[0009] 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.
[0010] 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.
[0011] Compared with the prior art, the present invention has at least the following advantages: In the sampling process of the Mini LED backlight module, this application acquires the second driving current in real time, outputs the first driving current according to the preset conversion coefficient, compares the second driving current value with the first driving current value, and outputs a current compensation value; and controls the current output of the driving chip according to the current compensation value to ensure that the current of each zone remains consistent, thereby solving the problem of Mini LED brightness decay caused by the temperature rise effect of the backlight module under long-term operation, and avoiding light decay affecting the picture quality. Attached Figure Description
[0012] 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.
[0013] Figure 1 This is a flowchart of a method for brightness compensation of a Mini LED backlight module according to an embodiment of the present invention; Figure 2 This is a functional block diagram of a Mini LED backlight module brightness compensation system according to an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation
[0014] 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.
[0015] 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.
[0016] 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.
[0017] Mini LED achieves precise control of the backlight module through LED driver chips and PWM local dimming technology. It can split the backlight into multiple independent control zones, thereby significantly improving the contrast of the picture and reducing the halo effect. Mini LED is a negative temperature coefficient semiconductor device. After long-term operation, its PN junction continues to heat up because electrical energy is not completely converted into light energy. As the temperature rises, the carrier concentration increases, which leads to a decrease in the resistivity of the PN junction. This causes the luminous efficiency of Mini LED to decrease, resulting in light decay of the display picture and affecting the viewing experience.
[0018] To address the aforementioned issues, this application provides a method, system, electronic device, and storage medium for compensating the brightness of a Mini LED backlight module. This method can solve the problem of brightness decay caused by the temperature rise effect of the backlight module during long-term operation, thus preventing light decay from affecting the visual experience.
[0019] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.
[0020] Figure 1 This is a schematic flowchart illustrating a method for brightness compensation of a Mini LED backlight module according to an embodiment of this application.
[0021] See Figure 1 A method for brightness compensation of a Mini LED backlight module, comprising: Step S101: Scan the backlight area, divide the backlight area, and output several regions to be compensated.
[0022] It should be noted that the backlight area is scanned and divided into multiple partitions (i,j) to be compensated, where i is the row and j is the column.
[0023] Step S102: Perform calculation processing on the areas to be compensated to obtain brightness values for several areas.
[0024] It should be noted that the independent brightness values of multiple sub-regions (i,j) to be compensated are calculated using formula (1): I(p,q) = max<R(p,q)、G(p,q)、B(p,q)> Where I(p,q) is the brightness value of a certain area, and max<R(p,q)、G(p,q)、B(p,q)> This refers to the RGB values of the backlight area, calculating the maximum brightness value of each pixel.
[0025] Step S103: Calculate the brightness values of each area to obtain the backlight brightness value.
[0026] It should be noted that the brightness value of the entire backlight area can be calculated based on the brightness value of each independent area to be compensated, using the maximum value algorithm: Bbl(i,j)=max(p,q)∈Ω(i,j)×I(p,q), where Bbl(i,j) is the backlight brightness value and Ω(i,j) is the pixel total of the area to be compensated (i,j).
[0027] Step S104: Read the preset current conversion coefficient, and generate the first driving current based on the preset current conversion coefficient and the backlight brightness value.
[0028] It should be noted that the backlight brightness value is mapped to the first driving current I_ideal using formula (2): I_ideal(i,j)=K×Bbl(i,j) and formula (3): I_ideal(i,j)=I(i,j)max×Bbl(i,j), where K is the preset current conversion coefficient. The first driving current is obtained through formula (2) and formula (3), and the first driving current here is the current under the ideal backlight condition.
[0029] Step S105: Acquire the second driving current, compare the second driving current with the first driving current, output the current compensation value, and apply the current compensation value to the corresponding compensation zone.
[0030] It should be noted that acquiring the second driving current includes sampling the second driving current through ADC analog-to-digital conversion. This step involves setting up a sampling process in the driver chip, sampling via I / O, and then obtaining the second driving current through ADC analog-to-digital conversion. Here, the second driving current is the actual current. Then, the difference between the second driving current and the first driving current is used to obtain the current compensation value. The driver chip then applies the current compensation value ▲I(i,j) to the corresponding backlight area (i,j) to compensate for the current gain, where Imew = second driving current + ▲I(i,j). If the gain exceeds the allowable range of the driver chip, limiting processing is performed.
[0031] Corresponding to the aforementioned application function implementation method embodiments, this application also provides a Mini LED backlight module brightness compensation system, electronic device, and corresponding embodiments.
[0032] Figure 2 This is a functional block diagram of the Mini LED backlight module brightness compensation system shown in the embodiments of this application.
[0033] See Figure 2 A Mini LED backlight module brightness compensation system includes a scanning module 100, a solving module 200, a calculation module 300, a reading module 400, and a gain module 500. The scanning module 100 scans the backlight area, divides the backlight area, and outputs several areas to be compensated. The solving module 200 performs solving processing on the areas to be compensated to obtain several area brightness values. The calculation module 300 calculates the brightness values of each area to obtain the backlight brightness value. The reading module 400 reads a preset current conversion coefficient and generates a first driving current based on the preset current conversion coefficient and the backlight brightness value. The gain module 500 collects a second driving current, compares the second driving current with the first driving current, outputs a current compensation value, and applies the current compensation value to the corresponding area to be compensated.
[0034] See Figure 2 The gain module 500 is also used to sample the second drive current via ADC analog-to-digital conversion.
[0035] 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.
[0036] Figure 3 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this application.
[0037] See Figure 3 The electronic device 1000 includes a memory 1010 and a processor 1020.
[0038] 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.
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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 brightness compensation in a Mini LED backlight module, characterized in that, include: Scan the backlight area, divide the backlight area, and output several regions to be compensated; The brightness values of several regions are obtained by performing calculations on the regions to be compensated. The backlight brightness value is obtained by calculating the brightness value of each of the aforementioned areas; Read the preset current conversion coefficient, and generate the first driving current based on the preset current conversion coefficient and the backlight brightness value; The second driving current is acquired, compared with the first driving current, and a current compensation value is output. The current compensation value is then applied to the corresponding compensation zone.
2. The Mini LED backlight module brightness compensation method according to claim 1, characterized in that, The acquisition of the second drive current includes: The second drive current is sampled by analog-to-digital conversion using an ADC.
3. A Mini LED backlight module brightness compensation system, characterized in that, include: The scanning module is used to scan the backlight area, divide the backlight area, and output several partitions to be compensated. The calculation module is used to calculate the brightness values of several regions by performing calculations on the regions to be compensated. The calculation module is used to calculate the brightness values of each of the aforementioned areas to obtain the backlight brightness value; The reading module is used to read the preset current conversion coefficient and generate a first driving current based on the preset current conversion coefficient and the backlight brightness value. The gain module is used to acquire the second drive current, compare the second drive current with the first drive current, output a current compensation value, and apply the current compensation value to the corresponding compensation zone.
4. The Mini LED backlight module brightness compensation system according to claim 5, characterized in that, The gain module is also used to sample the second drive current through ADC analog-to-digital conversion.
5. 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 1-2.
6. 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 1-2.