WO2017143635A1 - 一种降低显示面板功耗的方法及系统 - Google Patents

一种降低显示面板功耗的方法及系统 Download PDF

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WO2017143635A1
WO2017143635A1 PCT/CN2016/076481 CN2016076481W WO2017143635A1 WO 2017143635 A1 WO2017143635 A1 WO 2017143635A1 CN 2016076481 W CN2016076481 W CN 2016076481W WO 2017143635 A1 WO2017143635 A1 WO 2017143635A1
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brightness
image
displayed
pixel
adjustment coefficient
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PCT/CN2016/076481
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English (en)
French (fr)
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徐京
黄泰钧
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深圳市华星光电技术有限公司
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Priority to US15/031,745 priority Critical patent/US10417995B2/en
Publication of WO2017143635A1 publication Critical patent/WO2017143635A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

Definitions

  • the present invention relates to the field of display panels, and in particular, to a method and system for reducing power consumption of a display panel.
  • Display panels such as Organic Light-Emitting Diode (OLED) as a new generation of display technology, have the unparalleled advantages of LCD flat panel display: active illumination, ultra-high contrast, super-light gamut coverage, etc.
  • OLED Organic Light-Emitting Diode
  • the status of the field is becoming increasingly important.
  • the lifetime of OLED has always been an important factor restricting the development of OLED technology.
  • the aging of OLED display panels is affected by external factors and internal factors. The internal factors are mainly due to the change of working voltage and the reduction of luminous efficiency.
  • a common solution is to reduce the current and the brightness of the displayed image by adjusting the data, gamma voltage or power supply voltage, thereby reducing the power consumption of the display panel and also slowing down.
  • the purpose of the display panel aging reduces the contrast of the image while reducing the brightness of the displayed image, which is detrimental to the color and clear display of the image.
  • the technical problem to be solved by the present invention is to provide a method and system for reducing power consumption of a display panel, which can solve the problem of lowering the contrast of the display image by reducing the brightness thereof.
  • a technical solution adopted by the present invention is to provide a method for reducing power consumption of a display panel, including:
  • the contrast between the pixels of the image to be displayed is enhanced according to the brightness adjustment coefficient.
  • the step of obtaining the brightness of each pixel of the image to be displayed of the display panel includes:
  • the grayscale values of the R, G, and B components are converted into luminances in the YCbCr space, or the maximum values of the grayscale values of the R, G, and B components are taken as the luminance.
  • the step of calculating the average brightness of the image to be displayed according to the brightness of each pixel includes:
  • the average brightness of the image to be displayed is calculated from the brightness after the gamma conversion.
  • the step of obtaining the brightness adjustment coefficient according to the average brightness includes:
  • a value corresponding to the average brightness is found on a preset brightness adjustment curve, and a brightness adjustment coefficient is obtained based on the value.
  • the step of enhancing the contrast between pixels of the image to be displayed according to the brightness adjustment coefficient includes:
  • the degree of enhancement of contrast between pixels of the image to be displayed is set lower, and when the brightness adjustment coefficient is smaller, the degree of enhancement of contrast between pixels of the image to be displayed is set higher. .
  • another technical solution provided by the present invention is to provide a system for reducing power consumption of a display panel, including:
  • a pixel brightness acquisition module configured to acquire brightness of each pixel of the image to be displayed of the display panel
  • An average brightness calculation module wherein the average brightness calculation module is configured to calculate an average brightness of the image to be displayed according to the brightness of each pixel;
  • a brightness adjustment coefficient calculation module configured to obtain a brightness adjustment coefficient according to the average brightness
  • the brightness execution module is configured to reduce brightness of each pixel of the image to be displayed according to the brightness adjustment coefficient
  • the contrast execution module is configured to enhance contrast between pixels of the image to be displayed according to the brightness adjustment coefficient.
  • the pixel brightness acquisition module includes:
  • a pixel grayscale acquiring unit configured to acquire grayscale values of R, G, and B components of an image to be displayed
  • the pixel luminance calculation unit is configured to convert the grayscale value of the R, G, and B components into the luminance in the YCbCr space, or to use the maximum value of the grayscale values of the R, G, and B components as the luminance.
  • the average brightness calculation module includes:
  • a transform unit configured to perform gamma conversion on brightness of each pixel of the image to be displayed
  • the average brightness calculation unit is configured to calculate an average brightness of the image to be displayed according to the brightness after the gamma conversion.
  • the brightness adjustment coefficient calculation module is specifically configured to search for a value corresponding to the average brightness on a preset brightness adjustment curve, and obtain a brightness adjustment coefficient according to the value.
  • the contrast execution module is specifically configured to set a degree of enhancement of the contrast between pixels of the image to be displayed to be lower when the brightness adjustment coefficient is larger, and between pixels of the image to be displayed when the brightness adjustment coefficient is smaller.
  • the degree of contrast enhancement is set higher.
  • the present invention obtains the brightness of each pixel of the image to be displayed of the display panel, calculates the average brightness of the image to be displayed according to the brightness of each pixel, and obtains the brightness adjustment according to the average brightness.
  • the coefficient reduces the brightness of each pixel of the image to be displayed according to the brightness adjustment coefficient, and enhances the contrast between the pixels of the image to be displayed according to the brightness adjustment coefficient.
  • the present invention uses the brightness adjustment coefficient to reduce the brightness of each pixel of the image to be displayed, and also enhances the contrast between the pixels of the image to be displayed by using the brightness adjustment coefficient, thereby reducing the power consumption of the display panel.
  • the contrast of the displayed image is enhanced to achieve a clear display.
  • FIG. 1 is a flow chart of a method of reducing power consumption of a display panel according to an embodiment of the invention
  • step S101 in the method shown in FIG. 1;
  • FIG. 3 is a specific flowchart of step S102 in the method shown in FIG. 1;
  • FIG. 4 is a schematic diagram of a brightness adjustment curve in a specific process of step S103 in the method shown in FIG. 1;
  • FIG. 5 is a schematic diagram of another brightness adjustment curve in the specific flow of step S103 in the method shown in Figure 1;
  • FIG. 6 is a schematic diagram showing a contrast-enhanced tensile relationship when the brightness adjustment coefficient is 0.5 in the specific flow of step S105 in the method shown in FIG. 1;
  • step S105 is a schematic diagram showing a contrast-enhanced tensile relationship when the brightness adjustment coefficient is 0.8 in the specific flow of step S105 in the method shown in FIG. 1;
  • FIG. 8 is a schematic structural diagram of a system for reducing power consumption of a display panel according to an embodiment of the invention.
  • FIG. 9 is a schematic structural diagram of a system for reducing power consumption of a display panel according to another embodiment of the present invention.
  • the first embodiment of the method for reducing the power consumption of the display panel is as follows. Taking the OLED display panel as an example, a method for reducing the power consumption of the display panel is specifically described.
  • the lifetime degradation of OLED is affected by the external environment and its own component structure and materials used. As a display, the lifetime of OLED is also affected by device efficiency, working mode (DC DC, AC AC), driving mode, etc. . Therefore, prolonging the service life of the OLED device and improving its stability can be achieved by means of process improvement, material improvement, etc., and by reducing the luminous efficiency of the device and reducing the power consumption of the panel, which can reduce the heat generated organically. The effect of film structure and properties.
  • the OLED display illumination is controlled by red, green and blue pixels. If the brightness of the display screen is very high, it can be inferred that the corresponding power supply voltage or driving voltage is very high, the power consumed by the display panel is large, and a large amount of heat is generated, which affects the organic
  • the structure and properties of the film make the decay of red, green and blue pixels faster. Over time, color cast phenomenon will occur, and the human eye can perceive this change in color and the service life will be affected.
  • the existing power reduction method can reduce the brightness of the display image, reduce the power consumption of the display panel, and reduce the generation of heat.
  • the decrease in brightness causes the contrast to decrease and affects the image display quality, it is necessary to The contrast of the displayed image is enhanced to meet actual needs.
  • the method in the first embodiment of the present invention includes:
  • Step S101 Acquire brightness of each pixel of the image to be displayed of the display panel
  • the display image seen by the human eye on the display panel is composed of one pixel, and each pixel is composed of three sub-pixels of red R, green G, and blue B, and each sub-pixel can exhibit different brightness levels.
  • the gray scale represents the different brightness levels from the darkest to the brightest. The more intermediate levels, the more delicate the picture will be.
  • an 8-bit display panel can represent the 8th power of 2, which is equal to 256 brightness levels, that is, from 0-255 gray scale, each pixel on the display image is red and green by different gray levels.
  • the combination of blue and blue finally forms different brightness color points. That is to say, the brightness color change of each point on the display panel is actually caused by the gray scale change of the three RGB sub-pixels constituting this point.
  • the brightness of each pixel of the image to be displayed can be calculated by acquiring the grayscale values of the R, G, and B components of the image to be displayed, and the specific calculation method is optional:
  • step S102 is further performed: calculating an average brightness of the image to be displayed according to the brightness of each pixel;
  • Sub-step S11 performing gamma conversion on the brightness of each pixel of the image to be displayed
  • the gamma conversion is performed on the brightness of each pixel calculated above, and the calculation method is optional:
  • Y' represents the brightness after gamma conversion
  • GMA represents the gamma value of the display panel
  • gamma conversion is performed to make the next target value conform to the gamma characteristic of the display panel, and the actual pixel is more Brightness.
  • the value 255 in the Y' calculation formula represents the maximum grayscale value of the display panel, and the corresponding change of the value is performed according to the number of bits of the display panel, here is the maximum grayscale value of the 8-bit display panel, in other embodiments, such as 10
  • the maximum grayscale value of the bit display panel is 1023, and the value in the corresponding formula is 1023.
  • Sub-step S12 Calculating the average brightness of the image to be displayed according to the brightness after the gamma conversion.
  • the average brightness of the image to be displayed is the average value of the brightness after gamma conversion of each pixel, and the calculation method is optional:
  • APL represents the average brightness of the image to be displayed
  • m represents the number of rows
  • n represents the number of columns
  • m ⁇ n represents the number of all pixels in the image to be displayed.
  • the value range of the APL is related to the number of bits in the display panel. For example, when the display panel is 8 bits, the brightness level of the 8th power of 2 can be expressed, and the range of the APL is 0-255; when the display panel is 10 bits, it can represent 2 times of 2 times. The brightness level of the square, the APL range is 0-1023.
  • the APL is sometimes normalized, and the following operations are performed on the basis of the above:
  • APL APL / 255 ⁇ 100.
  • 255 is the highest grayscale value when the display panel is 8bit. If it is a 10-bit display panel, the denominator is 1023, and the adaptive modification is made according to the actual situation.
  • the normalized APL has a value range of 0-100.
  • Step S103 acquiring a brightness adjustment coefficient according to the average brightness
  • the value corresponding to the average brightness can be found on a preset brightness adjustment curve, and the brightness adjustment coefficient can be obtained according to the value.
  • the brightness adjustment curve may be a relationship between the average brightness and the brightness of a pixel adjusted in the image to be displayed. Calculating the ratio of the adjusted brightness of the pixel to the brightness before the adjustment is a brightness adjustment coefficient; the brightness adjustment curve may also be an average brightness. According to the curve of the brightness adjustment coefficient, the brightness adjustment coefficient is directly obtained according to the curve. Therefore, the value corresponding to the average brightness is searched for on the brightness adjustment curve, and the value is not limited, which is subject to actual demand.
  • the brightness adjustment curve is a relationship between the average brightness and the brightness of a certain pixel in the image to be displayed.
  • a pixel in the image to be displayed usually selects the pixel with the highest gray level value, which is mainly In order to simplify the function relationship, it is easy to operate.
  • the brightness adjustment curve of FIG. 4 is for the 8-bit display panel, and the pixel with the highest gray-scale value of 255 is selected, which can be obtained by the above-mentioned calculation method, and the brightness of the pixel with the highest gray-scale value of 255 is 255.
  • the abscissa indicates APL, and the value range is 0-100.
  • the ordinate indicates the brightness to be adjusted, and the maximum value Max is 255.
  • the change curve in the figure is divided into three segments, the horizontal line from point O to point A, the oblique line from point A to point B, and the horizontal line from point B to point C.
  • the oblique line from point A to point B can be divided into multiple segments.
  • the slopes of different intervals may have different slopes.
  • the corresponding adjusted brightness is the maximum value of 255, and the brightness adjustment coefficient is 1.
  • the brightness of the image to be displayed before and after adjustment is unchanged; if the value of APL is in the range from point A to point B, the adjusted brightness is less than the maximum brightness value of 255, and the brightness adjustment coefficient is less than 1, the brightness of the image to be displayed needs to be lowered;
  • the value range of APL is close to 100, indicating that the average brightness of the image to be displayed is very bright, the power consumption is too high, and the corresponding adjusted brightness is within the limited minimum brightness range. At this time, a large adjustment is needed to reduce the brightness of the image to be displayed. .
  • the brightness adjustment curve is also a relationship between the average brightness and the brightness of a pixel adjusted in the image to be displayed, but unlike FIG. 4, the middle portion of the curve is curved, different APL. The corresponding slope is different, and the brightness adjustment curve is not limited to these two forms, which is subject to actual needs.
  • Step S104 Decrease the brightness of each pixel of the image to be displayed according to the brightness adjustment coefficient
  • the brightness adjustment coefficient is obtained from the pixels of the highest gray level, and the brightness adjustment coefficient is applied to all the pixels of the image to be displayed, and the brightness adjustment coefficient is used to adjust the brightness of all pixels of the image to be displayed.
  • the brightness adjustment coefficient has a value range of 0-1. When the brightness adjustment coefficient is 1, the adjusted brightness is consistent with the brightness before adjustment, and may be adjusted without adjustment or according to the brightness adjustment coefficient 1; when the brightness adjustment coefficient is less than 1 , it is necessary to reduce the brightness of the image to be displayed.
  • the brightness adjustment can be done by changing the data digitally, or by adjusting the gamma voltage or the display panel drive voltage.
  • Step S105 Enhance the contrast between each pixel of the image to be displayed according to the brightness adjustment coefficient.
  • the degree of brightness reduction of the image to be displayed is lower, and the corresponding degree of contrast reduction is smaller, so it is necessary to set the degree of enhancement of contrast between pixels of the image to be displayed to be lower;
  • the smaller the brightness adjustment coefficient, the brightness of the image to be displayed The higher the degree of reduction, the higher the degree of contrast reduction, and therefore the higher the degree of enhancement of contrast between pixels of the image to be displayed.
  • the degree of contrast enhancement is determined by the size of the brightness adjustment coefficient.
  • a contrast enhancement algorithm corresponding to different brightness adjustment coefficients can be preset in the system, and the contrast enhancement algorithm can use a common tensile change relationship or histogram equalization.
  • the contrast of the image to be displayed refers to the ratio of the brightness level between the brightest white and the darkest black in the light and dark areas.
  • the method of decreasing the denominator by increasing the numerator that is, The brightness of the brightest white in the bright area of the image to be displayed is increased, and the brightness of the darkest black is lowered.
  • the brightness of the high gray level pixel can be increased, and the low gray level pixel is The brightness is reduced to enhance the contrast of the image to be displayed.
  • the data conversion curves are when the brightness adjustment coefficients are 0.5 and 0.8, the abscissa indicates the brightness of the input image to be displayed, and the ordinate indicates the brightness of the output image to be displayed.
  • the brightness threshold is lower than a certain brightness threshold, the brightness of the input image to be displayed is at a low gray level, and the brightness of the output image is lowered.
  • the brightness of the input image to be displayed is at a high gray level.
  • the brightness of the output display image is increased, so that the contrast of the output display image is enhanced.
  • the brightness of the displayed image after the contrast enhancement is still lower than the brightness before the image to be displayed is adjusted to ensure the power consumption of the display panel is lowered.
  • the brightness of the image to be displayed is reduced and the contrast is enhanced.
  • the OLED display panel is taken as an example in the first embodiment of the present invention, but the method for reducing the power consumption of the display panel is not applicable to the present invention.
  • the OLED display panel in other embodiments, such as a liquid crystal display, when there is a problem of reducing brightness to reduce power consumption, the method for reducing power consumption of the display panel can still be applied to the present invention, which is subject to actual needs.
  • a system for reducing power consumption of a display panel includes: a pixel brightness acquisition module 21, an average brightness calculation module 22, and a brightness adjustment coefficient calculation module. 23.
  • the connection relationship between the units is as shown in FIG. 8. It should be understood that the connection relationship shown in FIG. 8 is merely illustrative, and such mutual coupling or direct coupling or communication connection may be through some interfaces, devices or The indirect coupling or communication connection of the module can be electrical, mechanical or other form.
  • the pixel brightness acquiring module 21 is configured to acquire the brightness of each pixel of the image to be displayed of the display panel; the average brightness calculating module 22 is configured to calculate the average brightness of the image to be displayed according to the brightness of each pixel;
  • the coefficient calculation module 23 is configured to obtain a brightness adjustment coefficient according to the average brightness;
  • the brightness execution module 24 is configured to reduce the brightness of each pixel of the image to be displayed according to the brightness adjustment coefficient;
  • the contrast execution module 25 is configured to enhance each of the images to be displayed according to the brightness adjustment coefficient The contrast between pixels.
  • the pixel grayscale obtaining unit 26 of the pixel luminance acquiring module 21 is used for the grayscale value of the R, G, and B components of the image to be displayed, and the pixel luminance calculating unit 27 is configured to set the grayscale values of the R, G, and B components. Converted to the brightness in the YCbCr space, or the maximum value of the grayscale values of the R, G, and B components as the brightness.
  • the transform unit 28 of the average luminance calculation module 22 performs gamma conversion on the luminance of each pixel of the image to be displayed, and the average luminance calculation unit 29 is configured to calculate the average luminance of the image to be displayed based on the luminance after the gamma conversion.
  • the brightness adjustment coefficient calculation module 23 is specifically configured to search for a value corresponding to the average brightness on a preset brightness adjustment curve, and obtain a brightness adjustment coefficient according to the value.
  • the contrast execution module 25 is specifically configured to set a lower degree of enhancement of the contrast between pixels of the image to be displayed when the brightness adjustment coefficient is larger, and a contrast between pixels of the image to be displayed when the brightness adjustment coefficient is smaller.
  • the degree of enhancement is set higher.
  • the grayscale value of the R, G, and B components of the image to be displayed on the display panel is acquired by the grayscale acquiring unit, and the luminance of each pixel is calculated by the pixel luminance calculating unit 27, and after performing gamma conversion in the transforming unit 28,
  • Each pixel of the image to be displayed is processed in the average brightness calculation unit 29 to obtain an average brightness of the image to be displayed.
  • the brightness adjustment coefficient is obtained by the brightness adjustment coefficient calculation module 23
  • the brightness adjustment coefficient is used to pass the brightness execution module 24. Low brightness, while enhancing the contrast through the contrast execution module 25, achieving a reduction in power consumption of the display panel and a clear display of the image.
  • a system for reducing power consumption of a display panel includes: a processor 31, a memory 32, a gamma IC 33, a data driver 34, and a bus 35, a processor 31, a memory 32, and a gamma
  • the IC 33 and the data driver 34 are connected to the bus 35, respectively.
  • the processor 31 performs an action including the following steps:
  • the contrast between the pixels of the image to be displayed is enhanced by the gamma IC 33 or the data driver 34 according to the brightness adjustment coefficient.
  • the processor 31 is specifically configured to obtain grayscale values of the R, G, and B components of the image to be displayed, convert grayscale values of the R, G, and B components into luminances in the YCbCr space, or use R, G, and B.
  • the maximum value of the grayscale value of the component is taken as the luminance.
  • the processor 31 is specifically configured to perform gamma conversion on the brightness of each pixel of the image to be displayed, and calculate the average brightness of the image to be displayed according to the brightness after the gamma conversion.
  • the processor 31 is specifically configured to search for a value corresponding to the average brightness on a preset brightness adjustment curve, and obtain a brightness adjustment coefficient according to the value.
  • the processor 31 is specifically configured to implement, by the gamma IC 33 or the data driver 34, the degree of enhancement of the contrast between pixels of the image to be displayed is set to be lower when the brightness adjustment coefficient is larger, and to be smaller when the brightness adjustment coefficient is smaller.
  • the degree of enhancement of the contrast between pixels of the display image is set higher.
  • the memory 32 is used to store each of the values to be stored, such as the luminance, the average luminance, the luminance adjustment coefficient, the grayscale value of the RG and the B component, and the like in each of the above processes.
  • the method and system for reducing the power consumption of the display panel are described in detail by the above embodiments.
  • the brightness of each pixel of the image to be displayed of the display panel is obtained, and the average brightness of the image to be displayed is calculated according to the brightness of each pixel.
  • Brightness acquisition brightness adjustment factor The brightness of each pixel of the image to be displayed is lowered according to the brightness adjustment coefficient, and the contrast between the pixels of the image to be displayed is enhanced according to the brightness adjustment coefficient.
  • the present invention uses the brightness adjustment coefficient to reduce the brightness of each pixel of the image to be displayed, and also enhances the contrast between the pixels of the image to be displayed by using the brightness adjustment coefficient, thereby reducing the power consumption of the display panel.
  • the display image is not unclear due to the decrease in contrast.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device implementations described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor 31 to perform all or part of the steps of the methods of the various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), A variety of media that can store program code, such as random access memory (RAM), disk, or optical disk.

Abstract

一种降低显示面板功耗的方法和系统，所述方法包括：获取显示面板的待显示图像的各像素的亮度（S101）；根据各像素的亮度计算待显示图像的平均亮度（S102）；根据平均亮度获取亮度调节系数（S103）；根据亮度调节系数降低待显示图像的各像素的亮度（S104）；根据亮度调节系数增强待显示图像的各像素之间的对比度（S105）。通过上述方式，能够使显示面板的功耗降低，同时也使显示图像的对比度增强而实现清晰显示。

Description

一种降低显示面板功耗的方法及系统 【技术领域】
本发明涉及显示面板领域，特别是涉及一种降低显示面板功耗的方法及系统。
【背景技术】
显示面板如有机电致发光(Organic Light-Emitting Diode，OLED)作为新一代的显示技术，拥有液晶平板显示器无可比拟的优势：主动发光、超高对比度、超光色域覆盖等，所以在显示领域的地位日趋重要。然而OLED的寿命问题一直是制约OLED技术发展的重要因素，OLED显示面板的老化受外在因素和内在因素的影响，内在因素主要是由于工作电压的变化及发光效率的减低。
为了减缓OLED显示面板老化的速度，常用的解决办法为通过调节数据、伽马电压或电源电压的方法来降低电流及显示图像的亮度，以此来减小显示面板的功耗，同时也达到减缓显示面板老化的目的。然而，这种方法在降低显示图像亮度的同时也降低了图像的对比度，不利于图像的色彩度及清晰显示。
【发明内容】
本发明主要解决的技术问题是提供一种降低显示面板功耗的方法及系统，能够解决因降低显示图像的亮度而造成其对比度降低的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种降低显示面板功耗的方法，包括：
获取显示面板的待显示图像的各像素的亮度；
根据各像素的亮度计算待显示图像的平均亮度；
根据平均亮度获取亮度调节系数；
根据亮度调节系数降低待显示图像的各像素的亮度；
根据亮度调节系数增强待显示图像的各像素之间的对比度。
其中，获取显示面板的待显示图像的各像素的亮度的步骤包括：
获取待显示图像的R、G和B分量的灰阶值；
将R、G和B分量的灰阶值转换成YCbCr空间下的亮度，或者将R、G和B分量的灰阶值的最大值作为亮度。
其中，根据各像素的亮度计算待显示图像的平均亮度的步骤包括：
对待显示图像的各像素的亮度进行伽马变换；
根据伽马变换后的亮度计算待显示图像的平均亮度。
其中，根据平均亮度获取亮度调节系数的步骤包括：
在预先设定的亮度调节曲线上查找与平均亮度对应的数值，并根据数值获取亮度调节系数。
其中，根据亮度调节系数增强待显示图像的各像素之间的对比度的步骤包括：
当亮度调节系数越大时，将待显示图像的各像素间的对比度的增强程度设置得越低，当亮度调节系数越小时，将待显示图像的各像素间的对比度的增强程度设置得越高。
为解决上述技术问题，本发明提供的另一种技术方案是：提供一种降低显示面板功耗的系统，包括：
像素亮度获取模块，像素亮度获取模块用于获取显示面板的待显示图像的各像素的亮度；
平均亮度计算模块，平均亮度计算模块用于根据各像素的亮度计算待显示图像的平均亮度；
亮度调节系数计算模块，亮度调节系数计算模块用于根据平均亮度获取亮度调节系数；
亮度执行模块，亮度执行模块用于根据亮度调节系数降低待显示图像的各像素的亮度；
对比度执行模块，对比度执行模块用于根据亮度调节系数增强待显示图像的各像素之间的对比度。
其中，像素亮度获取模块包括：
像素灰阶获取单元，像素灰阶获取单元用于获取待显示图像的R、G和B分量的灰阶值；
像素亮度计算单元，像素亮度计算单元用于将R、G和B分量的灰阶值转换成YCbCr空间下的亮度，或者将R、G和B分量的灰阶值的最大值作为亮度。
其中，平均亮度计算模块包括：
变换单元，变换单元用于对待显示图像的各像素的亮度进行伽马变换；
平均亮度计算单元，平均亮度计算单元用于根据伽马变换后的亮度计算待显示图像的平均亮度。
其中，亮度调节系数计算模块具体用于在预先设定的亮度调节曲线上查找与平均亮度对应的数值，并根据数值获取亮度调节系数。
其中，对比度执行模块具体用于当亮度调节系数越大时，将待显示图像的各像素间的对比度的增强程度设置得越低，当亮度调节系数越小时，将待显示图像的各像素间的对比度的增强程度设置得越高。
本发明的有益效果是：区别于现有技术的情况，本发明通过获取显示面板的待显示图像的各像素的亮度，根据各像素的亮度计算待显示图像的平均亮度，根据平均亮度获取亮度调节系数，根据亮度调节系数降低待显示图像的各像素的亮度，根据亮度调节系数增强待显示图像的各像素之间的对比度。通过这种方式，本发明利用亮度调节系数降低待显示图像的各像素的亮度的同时，也利用亮度调节系数增强待显示图像的各像素之间的对比度，使显示面板的功耗降低，同时也使显示图像的对比度增强而实现清晰显示。
【附图说明】
图1是根据本发明一实施例的降低显示面板功耗的方法的流程图；
图2是图1所示的方法中的步骤S101的具体流程图；
图3是图1所示的方法中的步骤S102的具体流程图；
图4是图1所示的方法中的步骤S103具体流程中的一亮度调节曲线的示意图；
图5是图1所示的方法中的步骤S103具体流程中的另一亮度调节曲线的示意图；
图6是图1所示的方法中的步骤S105具体流程中亮度调节系数为0.5时的对比度增强拉伸关系示意图；
图7是图1所示的方法中的步骤S105具体流程中亮度调节系数为0.8时的对比度增强拉伸关系示意图；
图8是根据本发明一实施例的降低显示面板功耗的系统的结构示意图；
图9是根据本发明另一实施例的降低显示面板功耗的系统的结构示意图。
【具体实施方式】
为使本领域的技术人员更好地了解本发明的技术方案，下面结合附图和具体实施方式对本发明所提供的一种降低显示面板功耗的方法及系统做进一步详细描述。
本发明降低显示面板功耗的方法实施例一，以OLED显示面板为例，来具体阐述降低显示面板功耗的方法。
OLED寿命衰退既受外在环境的影响，又和其自身组件结构及所使用的材料有关，作为显示器，OLED的寿命还受到器件效率、工作模式(直流DC、交流AC)、驱动方式等的影响。因此，延长OLED器件的使用寿命，提高其稳定性，可以通过工艺改善、材料改善等方式，还可以通过提高器件的发光效率，降低面板功耗的方式，这种方式可以减少产生的热对有机薄膜结构和性能的影响。
OLED显示器发光是由红色、绿色、蓝色像素控制的，如果显示画面的亮度很高，可以推测相应的电源电压或驱动电压很高，显示面板消耗的功率很大，产生大量的热，影响有机薄膜的结构和性能，使得红色、绿色、蓝色像素衰减加快，随着时间的推移，就会出现偏色现象，人眼能够感知出这种色彩上的变化，使用寿命就会受到影响。
由此可见，现有的功率降低方法虽然能够降低显示图像的亮度，使显示面板的功耗降低，减少热的产生，然而由于亮度的降低会导致对比度的降低，影响图像显示质量，因此需要对显示图像的对比度进行增强以满足实际需求。如图1所示，本发明实施例一的方法包括：
步骤S101：获取显示面板的待显示图像的各像素的亮度；
具体地，人眼在显示面板上看到的显示图像，是由一个个像素组成，每一个像素由红R、绿G、蓝B三个子像素组成，每一个子像素可以呈现不同的亮度级别，而灰阶代表由最暗到最亮之间不同的亮度级别，这中间级别越多，所能够呈现的画面效果也就越细腻。
以8位(bit)显示面板为例，能表现2的8次方，等于256个亮度级别，也就是从0-255灰阶，显示图像上每个像素，均由不同灰阶的红、绿、蓝组合起来，最终形成不同的亮度色彩点，也就是说，显示面板上每一个点的亮度色彩变化，其实都是由构成这个点的三个RGB子像素的灰阶变化所带来的。
因此，如图2所示，可以通过获取待显示图像的R、G和B分量的灰阶值，来计算得到待显示图像的各像素的亮度，具体计算方法可选：
1)将R、G和B分量的灰阶值转换成YCbCr空间下的亮度Y：
Y＝0.299R+0.587G+0.114B；
或者2)将R、G和B分量的灰阶值的最大值作为亮度Y：
Y＝Max(R，G，B)。
在其他实施例中，可选其他计算方法，对其并不做限定。本实施例一根据上述计算方法，得到各像素的亮度，进一步执行步骤S102：根据各像素的亮度计算待显示图像的平均亮度；
具体步骤如图3所示，包括：
子步骤S11：对待显示图像的各像素的亮度进行伽马变换；
对上述计算得到的各像素的亮度进行伽马变换，计算方法可选：
Y′＝(Y/255)GMA×255。
其中，Y′表示进行伽马变换后的亮度，GMA表示显示面板的伽马值，对亮度进行伽马变换是为了使接下来的目标值符合显示面板的伽马特性，更能体现像素实际的明亮程度。Y′计算公式中的数值255表示显示面板的最大灰阶值，根据显示面板的位数进行该数值的相应变化，此处为8bit显示面板的最大灰阶值，在其他实施例中，如10位显示面板的最大灰阶值为1023，对应公式中的数值为1023。
子步骤S12：根据伽马变换后的亮度计算待显示图像的平均亮度。
待显示图像的平均亮度是各像素进行伽马变换后的亮度平均值，计算方法可选：
Figure PCTCN2016076481-appb-000001
其中，APL表示待显示图像的平均亮度，m表示行数，n表示列数，m×n表示待显示图像中所有像素的个数。APL的数值范围与显示面板的位数相关，如显示面板为8bit时，能表现2的8次方的亮度层次，APL的范围为0-255；显示面板为10bit时，能表现2的10次方的亮度层次，APL的范围为0-1023。
为了实现的方便，有时会对APL做归一化处理，在上述基础上进行如下运算：
APL＝APL/255×100。
其中，255是显示面板为8bit时的最高灰阶值，如果是10bit的显示面板，分母为1023，根据实际情况做适应性修改。经过归一化后的APL的数值范围为0-100。
步骤S103：根据平均亮度获取亮度调节系数；
具体可通过在预先设定的亮度调节曲线上查找与平均亮度对应的数值，并根据数值获取亮度调节系数。
亮度调节曲线可以是平均亮度与待显示图像中某一像素调节后亮度的关系曲线，计算该像素调节后的亮度与调节前的亮度的比值得出亮度调节系数；亮度调节曲线也可以是平均亮度与亮度调节系数的关系曲线，根据该曲线直接得出亮度调节系数，因此，在亮度调节曲线上查找与平均亮度对应的数值，该数值并不限定，以实际需求为准。
如图4所示，亮度调节曲线是平均亮度与待显示图像中某一像素调节后亮度的关系曲线，一般来说，待显示图像中某一像素通常选择最高灰阶值的像素，这主要是为了简化函数关系，便于操作。
图4的亮度调节曲线针对8bit显示面板，选取最高灰阶值为255的像素，由上述提到的计算方法可以得到，最高灰阶值为255的像素调整前的亮度为255。
图4中横坐标表示APL，数值范围为0-100，纵坐标表示需要调节后的亮度，其最大值Max为255。图中的变化关系曲线分为三段，O点到A点水平直线，A点至B点的斜线，B点至C点水平直线，其中，A点至B点的斜线可划分成多段不同区间的斜线，斜率可不同。
如果经过子步骤S12计算的APL数值较小，也就是待显示图像的平均亮度很低，在O点至A点的数值范围内，对应的调节后的亮度为最大值255，亮度调节系数为1，调节前后待显示图像的亮度不变；如果APL的数值在A点至B点的范围内，调节后的亮度小于亮度最大值255，亮度调节系数小于1，需要降低待显示图像的亮度；如果APL的数值范围接近100，说明待显示图像的平均亮度很亮，功率消耗过高，对应的调节后的亮度在限定的最小亮度范围内，此时需要大幅度调节，以降低待显示图像的亮度。
在其他实施例中，如图5所示，亮度调节曲线也是平均亮度与待显示图像中某一像素调节后亮度的关系曲线，但是不同于图4，该曲线的中间部分为弧形，不同APL对应的斜率不同，亮度调节曲线并不限于这两种形式，以实际需求为准。
步骤S104：根据亮度调节系数降低待显示图像的各像素的亮度；
上述由最高灰阶的像素得出亮度调节系数，该亮度调节系数适用于待显示图像的所有像素，以该亮度调节系数对待显示图像的所有像素进行亮度调节。亮度调节系数的数值范围为0-1，当亮度调节系数为1时，调节后的亮度与调节前的亮度一致，可选不进行调节或按照亮度调节系数1进行调节；亮度调节系数小于1时，需要降低待显示图像的亮度。亮度调节可选通过数位改变数据的方式，也可以通过调节伽马电压或显示面板驱动电压的方式。
步骤S105：根据亮度调节系数增强待显示图像的各像素之间的对比度。
具体地，当亮度调节系数越大时，待显示图像的亮度降低程度越低，相应的对比度降低程度越小，因此需要将待显示图像的各像素间的对比度的增强程度设置得越低；当亮度调节系数越小时，待显示图像的亮度 降低程度越高，相应的对比度降低程度也越高，因此需要将待显示图像的各像素间的对比度的增强程度设置得越高。可以看出，对比度增强程度由亮度调节系数的大小决定，通常可以在系统中预设不同亮度调节系数对应的对比度增强算法，对比度增强算法可以使用常见的拉伸变化关系或直方图均衡等。
待显示图像的对比度是指其明暗区域最亮的白与最暗的黑之间不同亮度层级的比值，要使该比值增大，可以通过增大分子减小分母的方式，也就是说，使待显示图像的明亮区域中最亮的白的亮度增大，最暗的黑的亮度降低，对应于待显示图像的各像素，可以通过使高灰阶像素的亮度增大，低灰阶像素的亮度降低，来实现增强待显示图像的对比度。
如图6及图7所示，是使用拉伸关系时，亮度调节系数分别为0.5及0.8时的数据变换曲线，横坐标表示输入的待显示图像的亮度，纵坐标表示输出的显示图像的亮度，在低于某一亮度阈值时，输入的待显示图像的亮度处于低灰阶，输出的显示图像的亮度降低，高于某一亮度阈值时，输入的待显示图像的亮度处于高灰阶，输出的显示图像的亮度增大，从而使得输出的显示图像的对比度增强。输出的对比度增强后的显示图像的亮度仍然低于待显示图像调节前的亮度，以确保显示面板功耗的降低。
比较图6及图7的数据变换曲线，可以看出，利用图6的数据变换曲线输出的显示图像的对比度增强程度要比利用图7的数据变换曲线输出的显示图像的对比度增强程度高，图6的数据变换曲线的趋势更为陡峭，这与前面提到的亮度调节系数的大小相符合。
通过上述一系列步骤，实现待显示图像亮度的降低及对比度的增强，需要说明的是，本发明实施例一以OLED显示面板为例，但并不表示本发明降低显示面板功耗的方法只适用于OLED显示面板，在其他实施例中，如液晶显示器中，存在降低亮度来降低功耗的问题时，仍然可适用本发明降低显示面板功耗的方法，以实际需求为准。
如图8所示，根据本发明一实施例的降低显示面板功耗的系统包括：像素亮度获取模块21、平均亮度计算模块22、亮度调节系数计算模块 23、亮度执行模块24和对比度执行模块25，其中像素亮度获取模块21包括像素灰阶获取单元26和像素亮度计算单元27，平均亮度计算模块22包括变换单元28和平均亮度计算单元29，各个模块及单元之间的连接关系如图8所示，应该理解，图8所示的连接关系仅仅是示意性的，这种相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或模块的间接耦合或通信连接，可以是电性，机械或其它的形式。
具体地，本实施例中，像素亮度获取模块21用于获取显示面板的待显示图像的各像素的亮度；平均亮度计算模块22用于根据各像素的亮度计算待显示图像的平均亮度；亮度调节系数计算模块23用于根据平均亮度获取亮度调节系数；亮度执行模块24用于根据亮度调节系数降低待显示图像的各像素的亮度；对比度执行模块25用于根据亮度调节系数增强待显示图像的各像素之间的对比度。
其中，像素亮度获取模块21的像素灰阶获取单元26用于待显示图像的R、G和B分量的灰阶值，其像素亮度计算单元27用于将R、G和B分量的灰阶值转换成YCbCr空间下的亮度，或者将R、G和B分量的灰阶值的最大值作为亮度。
平均亮度计算模块22的变换单元28用于对待显示图像的各像素的亮度进行伽马变换，其平均亮度计算单元29用于根据伽马变换后的亮度计算待显示图像的平均亮度。
亮度调节系数计算模块23具体用于在预先设定的亮度调节曲线上查找与平均亮度对应的数值，并根据数值获取亮度调节系数。
对比度执行模块25具体用于当亮度调整系数越大时，将待显示图像的各像素间的对比度的增强程度设置得越低，当亮度调整系数越小时，将待显示图像的各像素间的对比度的增强程度设置得越高。
本发明实施例通过灰阶获取单元获取显示面板待显示图像的R、G和B分量的灰阶值，通过像素亮度计算单元27计算各像素的亮度，在变换单元28中进行伽马变换后，对待显示图像各像素在平均亮度计算单元29中处理得到待显示图像的平均亮度，由亮度调节系数计算模块23得到亮度调节系数后，利用该亮度调节系数通过亮度执行模块24降 低亮度，同时通过对比度执行模块25增强对比度，实现显示面板功耗的降低和图像的清晰显示。
如图9所示，根据本发明另一实施例的降低显示面板功耗的系统包括：处理器31、存储器32、伽马IC33、数据驱动器34和总线35，处理器31、存储器32、伽马IC33、数据驱动器34分别与总线35相连。
处理器31执行包括以下步骤在内的动作：
获取显示面板的待显示图像的各像素的亮度；
根据各像素的亮度计算待显示图像的平均亮度；
根据平均亮度获取亮度调节系数；
通过伽马IC33或数据驱动器34根据亮度调节系数降低待显示图像的各像素的亮度；
通过伽马IC33或数据驱动器34根据亮度调节系数增强待显示图像的各像素之间的对比度。
其中，处理器31具体用于获取待显示图像的R、G和B分量的灰阶值，将R、G和B分量的灰阶值转换成YCbCr空间下的亮度，或者将R、G和B分量的灰阶值的最大值作为亮度。
处理器31具体用于对待显示图像的各像素的亮度进行伽马变换，根据伽马变换后的亮度计算待显示图像的平均亮度。
处理器31具体用于在预先设定的亮度调节曲线上查找与平均亮度对应的数值，并根据数值获取亮度调节系数。
处理器31具体用于通过伽马IC33或数据驱动器34实现当亮度调整系数越大时，将待显示图像的各像素间的对比度的增强程度设置得越低，当亮度调整系数越小时，将待显示图像的各像素间的对比度的增强程度设置得越高。
存储器32用于存储上述过程中的各像素的亮度、平均亮度、亮度调节系数、RG和B分量的灰阶值等产生的各个需要存储的数值。
本发明通过上述实施例详细描述了一种降低显示面板功耗的方法及系统，通过获取显示面板的待显示图像的各像素的亮度，根据各像素的亮度计算待显示图像的平均亮度，根据平均亮度获取亮度调节系数， 根据亮度调节系数降低待显示图像的各像素的亮度，根据亮度调节系数增强待显示图像的各像素之间的对比度。通过这种方式，本发明利用亮度调整系数降低待显示图像的各像素的亮度的同时，也利用亮度调整系数增强待显示图像的各像素之间的对比度，使显示面板的功耗降低，同时也使显示图像不会因为对比度的降低而出现不清晰的现象。
在本发明所提供的几个实施方式中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施方式仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施方式方案的目的。
另外，在本发明各个实施方式中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器31(processor)执行本发明各个实施方式所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、 随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (18)

  1. 一种降低显示面板功耗的方法，其中，包括：
    获取所述显示面板的待显示图像的各像素的亮度；
    对所述待显示图像的各像素的亮度进行伽马变换，根据所述伽马变换后的亮度计算所述待显示图像的平均亮度；
    在预先设定的亮度调节曲线上查找与所述平均亮度对应的数值，并根据所述数值获取亮度调节系数；
    根据所述亮度调节系数降低所述待显示图像的各像素的亮度；
    根据所述亮度调节系数增强所述待显示图像的各像素之间的对比度。
  2. 一种降低显示面板功耗的方法，其中，包括：
    获取所述显示面板的待显示图像的各像素的亮度；
    根据所述各像素的亮度计算所述待显示图像的平均亮度；
    根据所述平均亮度获取亮度调节系数；
    根据所述亮度调节系数降低所述待显示图像的各像素的亮度；
    根据所述亮度调节系数增强所述待显示图像的各像素之间的对比度。
  3. 根据权利要求2所述的方法，其中，所述获取所述显示面板的待显示图像的各像素的亮度的步骤包括：
    获取待显示图像的R、G和B分量的灰阶值；
    将所述R、G和B分量的灰阶值转换成YCbCr空间下的所述亮度。
  4. 根据权利要求2所述的方法，其中，所述获取所述显示面板的待显示图像的各像素的亮度的步骤包括：
    获取待显示图像的R、G和B分量的灰阶值；
    将所述R、G和B分量的灰阶值的最大值作为所述亮度。
  5. 根据权利要求2所述的方法，其中，所述根据所述各像素的亮度计算所述待显示图像的平均亮度的步骤包括：
    对所述待显示图像的各像素的亮度进行伽马变换；
    根据所述伽马变换后的亮度计算所述待显示图像的平均亮度。
  6. 根据权利要求2所述的方法，其中，所述根据所述平均亮度获取亮度调节系数的步骤包括：
    在预先设定的亮度调节曲线上查找与所述平均亮度对应的数值，并根据所 述数值获取所述亮度调节系数。
  7. 根据权利要求6所述的方法，其中，
    所述亮度调节曲线是所述平均亮度与所述待显示图像中某一像素需要调节后亮度的关系曲线，根据所述某一像素需要调节后的亮度与调节前的亮度获取所述亮度调节系数。
  8. 根据权利要求2所述的方法，其中，所述根据亮度调节系数降低待显示图像的各像素的亮度的步骤包括：
    根据亮度调节系数降低伽马电压，或者降低所述显示面板的驱动电压，或者通过数位改变数据的方式，使所述待显示图像的各像素的亮度降低。
  9. 根据权利要求2所述的方法，其中，所述根据所述亮度调节系数增强所述待显示图像的各像素之间的对比度包括：
    当所述亮度调节系数越大时，将所述待显示图像的各像素间的对比度的增强程度设置的越低，当所述亮度调节系数越小时，将所述待显示图像的各像素间的对比度的增强程度设置的越高。
  10. 根据权利要求9所述的方法，其中，
    当所述亮度调节系数越大时，将所述待显示图像的低灰阶像素的亮度降低程度设置的越低，将所述待显示图像的高灰阶像素的亮度增大程度设置的越低；
    当所述亮度调节系数越小时，将所述待显示图像的低灰阶像素的亮度降低程度设置的越高，将所述待显示图像的高灰阶像素的亮度增大程度设置的越高。
  11. 一种降低显示面板功耗的系统，其中，包括：
    像素亮度获取模块，所述像素亮度获取模块用于获取所述显示面板的待显示图像的各像素的亮度；
    平均亮度计算模块，所述平均亮度计算模块用于根据所述各像素的亮度计算所述待显示图像的平均亮度；
    亮度调节系数计算模块，所述亮度调节系数计算模块用于根据所述平均亮度获取亮度调节系数；
    亮度执行模块，所述亮度执行模块用于根据所述亮度调节系数降低所述待显示图像的各像素的亮度；
    对比度执行模块，所述对比度执行模块用于根据所述亮度调节系数增强所述待显示图像的各像素之间的对比度。
  12. 根据权利要求11所述的系统，其中，所述像素亮度获取模块包括：
    像素灰阶获取单元，所述像素灰阶获取单元用于获取待显示图像的R、G和B分量的灰阶值；
    像素亮度计算单元，所述像素亮度计算单元用于将所述R、G和B分量的灰阶值转换成YCbCr空间下的所述亮度，或者将所述R、G和B分量的灰阶值的最大值作为所述亮度。
  13. 根据权利要求11所述的系统，其中，所述平均亮度计算模块包括：
    变换单元，所述变换单元用于对所述待显示图像的各像素的亮度进行伽马变换；
    平均亮度计算单元，所述平均亮度计算单元用于根据所述伽马变换后的亮度计算所述待显示图像的平均亮度。
  14. 根据权利要求11所述的系统，其中，
    所述亮度调节系数计算模块具体用于在预先设定的亮度调节曲线上查找与所述平均亮度对应的数值，并根据所述数值获取所述亮度调节系数。
  15. 根据权利要求14所述的系统，其中，
    所述亮度调节曲线是所述平均亮度与所述待显示图像中某一像素需要调节后亮度的关系曲线，所述亮度调节系数计算模块具体用于在所述亮度调节曲线上查找所述平均亮度对应的所述某一像素需要调节后的亮度，根据所述某一像素需要调节后的亮度与调节前的亮度获取所述亮度调节系数。
  16. 根据权利要求11所述的系统，其中，
    所述亮度执行模块具体用于通过降低伽马电压，或者降低所述显示面板的驱动电压，或者通过数位改变数据的方式，使所述待显示图像的各像素的亮度降低。
  17. 根据权利要求11所述的系统，其中，
    所述对比度执行模块具体用于当所述亮度调节系数越大时，将所述待显示图像的各像素间的对比度的增强程度设置得越低，当所述亮度调节系数越小时，将所述待显示图像的各像素间的对比度的增强程度设置得越高。
  18. 根据权利要求17所述的系统，其中，
    所述对比度执行模块具体用于当所述亮度调节系数越大时，将所述待显示图像的低灰阶像素的亮度降低程度设置的越低，将所述待显示图像的高灰阶像素的亮度增大程度设置的越低；
    当所述亮度调节系数越小时，将所述待显示图像的低灰阶像素的亮度降低 程度设置的越高，将所述待显示图像的高灰阶像素的亮度增大程度设置的越高。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114566116A (zh) * 2020-11-13 2022-05-31 西安诺瓦星云科技股份有限公司 图像亮度控制方法及装置和显示控制器

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106157889B (zh) * 2016-08-15 2019-11-29 昆山国显光电有限公司 提高oled显示亮度均匀性的方法及装置
CN106502609B (zh) * 2016-10-31 2019-11-15 维沃移动通信有限公司 一种显示亮度调整方法及移动终端
CN106548751B (zh) * 2017-01-13 2019-02-12 北京小米移动软件有限公司 显示面板的显示方法和装置
CN106531081B (zh) * 2017-01-23 2019-06-07 武汉华星光电技术有限公司 一种显示模块驱动装置及方法
CN106971695B (zh) * 2017-03-27 2019-04-30 武汉华星光电技术有限公司 Rgbw液晶显示装置的亮度调节方法及装置
CN108962185B (zh) * 2017-05-22 2020-05-29 京东方科技集团股份有限公司 一种降低显示画面亮度的方法、其装置及显示装置
CN107169938B (zh) * 2017-05-24 2019-05-31 深圳市华星光电半导体显示技术有限公司 亮度调节系统
KR102344334B1 (ko) * 2017-06-27 2021-12-29 삼성전자주식회사 영상을 처리하기 위한 방법 및 디스플레이 장치
CN107680056B (zh) * 2017-09-27 2020-03-10 深圳市华星光电半导体显示技术有限公司 一种图像处理方法及装置
US10417966B2 (en) 2017-09-30 2019-09-17 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd Brightness regulation method of a display panel and brightness regulation device
CN107633808A (zh) * 2017-09-30 2018-01-26 深圳市华星光电半导体显示技术有限公司 显示面板的亮度调节方法及亮度调节装置
CN109785792B (zh) 2017-11-10 2020-12-25 京东方科技集团股份有限公司 显示面板的驱动方法及装置、显示装置
CN107845363B (zh) * 2017-11-23 2019-11-26 维沃移动通信有限公司 一种显示控制方法及移动终端
CN108810318B (zh) * 2018-06-11 2020-12-04 京东方科技集团股份有限公司 图像处理方法、装置、显示设备及计算机存储介质
CN108831381A (zh) * 2018-06-25 2018-11-16 深圳市华星光电半导体显示技术有限公司 显示数据调整系统及显示数据调整方法
KR102624510B1 (ko) * 2018-10-01 2024-01-16 삼성디스플레이 주식회사 레이저 조사 장치, 그의 구동 방법 및 그를 이용한 표시 장치의 제조 방법
CN109243366B (zh) * 2018-10-25 2020-09-11 上海兆芯集成电路有限公司 图像处理方法及装置
KR102577467B1 (ko) * 2018-11-02 2023-09-12 엘지디스플레이 주식회사 표시장치와 그 휘도 제어 방법
CN109545153A (zh) * 2018-11-23 2019-03-29 深圳Tcl新技术有限公司 液晶屏的亮度调整方法、电视机和存储介质
CN110085174B (zh) * 2019-04-23 2021-04-02 深圳市华星光电半导体显示技术有限公司 降低显示器功耗的方法及装置
US11295703B2 (en) 2019-07-17 2022-04-05 Apple Inc. Displays with content-dependent brightness adjustment
CN111028808B (zh) * 2019-12-24 2021-10-08 惠州市华星光电技术有限公司 液晶面板亮度视角调节方法、装置、系统及显示装置
CN113257162B (zh) * 2020-02-12 2022-12-27 北京小米移动软件有限公司 屏幕的亮度调节方法、装置和存储介质
CN112614455B (zh) * 2020-03-25 2022-07-15 西安诺瓦星云科技股份有限公司 显示屏色温漂移补偿方法、装置和系统以及显示控制系统
CN111816117A (zh) * 2020-07-06 2020-10-23 惠州市华星光电技术有限公司 显示面板画面亮度调节的方法及显示装置
CN113077758B (zh) * 2021-03-29 2023-04-28 联想(北京)有限公司 一种控制方法、装置和电子设备
CN114120931B (zh) * 2021-11-18 2023-08-01 惠州视维新技术有限公司 对比度调节方法、装置、存储介质及电子设备
CN116229876B (zh) * 2021-12-03 2024-04-19 荣耀终端有限公司 调节显示组件的驱动电压的方法与终端设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070013725A1 (en) * 2005-07-18 2007-01-18 Dialog Semiconductor Gmbh Gamma curve correction for TN and TFT display modules
JP2008175958A (ja) * 2007-01-17 2008-07-31 Sony Corp 表示装置、表示駆動方法
CN101324722A (zh) * 2007-06-13 2008-12-17 深圳Tcl新技术有限公司 一种液晶显示器背光亮度和对比度调整的方法
CN101673520A (zh) * 2009-08-18 2010-03-17 北京巨数数字技术开发有限公司 一种液晶显示装置以及图像信号处理方法
CN101739973A (zh) * 2008-11-27 2010-06-16 比亚迪股份有限公司 显示设备及其显示方法
CN101877208A (zh) * 2010-06-29 2010-11-03 彩虹集团公司 一种led背光源的控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08317250A (ja) * 1995-05-19 1996-11-29 Fujitsu General Ltd ダイナミック映像制御回路
US7170477B2 (en) * 2000-04-13 2007-01-30 Sharp Kabushiki Kaisha Image reproducing method, image display apparatus and picture signal compensation device
JP4277773B2 (ja) * 2004-09-21 2009-06-10 株式会社日立製作所 映像表示装置
US8860751B2 (en) * 2009-09-01 2014-10-14 Entertainment Experience Llc Method for producing a color image and imaging device employing same
CN103024320B (zh) * 2012-12-14 2015-08-19 四川长虹电器股份有限公司 一种液晶电视动态背光下的图像亮度自动补偿方法及装置
US8929679B1 (en) * 2013-06-12 2015-01-06 Google Inc. Systems and methods for changing contrast based on brightness of an output for presentation on a display
CN103413536B (zh) * 2013-08-22 2016-03-09 四川长虹电子系统有限公司 显示器节能控制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070013725A1 (en) * 2005-07-18 2007-01-18 Dialog Semiconductor Gmbh Gamma curve correction for TN and TFT display modules
JP2008175958A (ja) * 2007-01-17 2008-07-31 Sony Corp 表示装置、表示駆動方法
CN101324722A (zh) * 2007-06-13 2008-12-17 深圳Tcl新技术有限公司 一种液晶显示器背光亮度和对比度调整的方法
CN101739973A (zh) * 2008-11-27 2010-06-16 比亚迪股份有限公司 显示设备及其显示方法
CN101673520A (zh) * 2009-08-18 2010-03-17 北京巨数数字技术开发有限公司 一种液晶显示装置以及图像信号处理方法
CN101877208A (zh) * 2010-06-29 2010-11-03 彩虹集团公司 一种led背光源的控制方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114566116A (zh) * 2020-11-13 2022-05-31 西安诺瓦星云科技股份有限公司 图像亮度控制方法及装置和显示控制器

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