RU2659484C1 - Method and device for display brightness adjusting - Google Patents

Abstract

FIELD: image processing means.SUBSTANCE: invention relates to the field of image processing, namely, to the display brightness adjusting. Method of display brightness adjusting comprises the following steps: obtaining initial gray pixel values on the display interface; performing a gray scale conversion from the initial values of the gray scale of pixels to obtain the transformed values of the gray scale of pixels; correcting gray scale values of the display interface according to the converted values of the gray scale of the pixels; and after the process of brightness adjusting, it is again necessary to determine the brightness at various positions of the display, and then the values of the gray scale of the parts with different brightness are appropriately adjusted to varying degrees; and the gray scale of each pixel is adjusted according to the brightness of each pixel on the display.EFFECT: increased efficiency of adjusting the brightness of the display interface.21 cl, 24 dwg, 1 tbl

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on Chinese Patent Application No. 201510020861.0, filed January 15, 2015, the entire contents of which are incorporated herein by reference, and claim its priority.

FIELD OF TECHNOLOGY

[0002] The present invention relates generally to the field of image processing and, in particular, to a method for adjusting display brightness and an apparatus for adjusting display brightness.

BACKGROUND

[0003] In everyday life, many tend to play on an intelligent device (such as a mobile phone) before falling asleep. If you turn on the light, then not only electricity is lost, but it also affects other people. If you do not turn on the light, then in order to use the mobile phone in conditions of extremely low brightness (such as night at 0.001 lux), most choose to reduce the brightness of the mobile phone. However, since the brightness is limited by the backlight scheme of the liquid crystal screen, the design, control mode and cost, it is difficult to ensure extremely low brightness, as a result of which, when using a mobile phone in significant darkness (such as night at 0.001 lux), the eyes are harmed.

SUMMARY OF THE INVENTION

[0004] The present invention provides a method for adjusting display brightness and an apparatus for adjusting display brightness.

[0005] In a first aspect of embodiments of the present invention, there is provided a method for adjusting display brightness, including:

obtaining the initial values of the gray scale of pixels on the display interface;

performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values; and

adjusting the grayscale values of the display interface according to the converted grayscale values of the pixels.

[0006] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

obtaining a gray scale conversion correspondence, wherein this correspondence includes transformed gray scale values corresponding to the initial gray scale values of pixels; and

a search for the converted gray scale values corresponding to the original gray scale values of the pixels according to the given correspondence.

[0007] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

obtaining a conversion function for converting a gray scale; and

calculating the converted pixel gray scale values according to the conversion function and the original pixel gray scale values.

[0008] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

detection of the current value of the brightness of the environment;

selection of a correspondence or conversion function for gray scale conversion according to the current value of the environmental brightness; and

searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or calculating the converted gray scale values corresponding to the original gray pixel scale values according to the conversion function.

[0009] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

getting the number of bits to display the original gray scale values;

selection of a correspondence or conversion function for gray scale conversion according to the number of bits; and

searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or calculating the converted gray scale values corresponding to the original gray pixel scale values according to the conversion function.

[0010] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

detection of the current value of the brightness of the environment; and

performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels if the current value of the brightness of the environment is less than or equal to a preset value of the brightness of the environment.

[0011] Alternatively, this method further includes:

detection of the current value of the brightness of the environment;

adjusting the brightness value of the screen display according to the current brightness value of the environment;

determining a relationship between the adjusted display brightness value and the preset display brightness values;

adjusting the first type of gray scale value if the adjusted display brightness value is lower than the first preset display brightness value; and

adjusting the second type of gray scale value if the adjusted display brightness value is higher than the second preset display brightness value.

[0012] Alternatively, this method further includes:

detecting pixel brightness values on a display interface;

an assessment of whether the pixel brightness values on the display interface exceed the preset pixel brightness value;

determining pixel positions with luminance values exceeding a predetermined pixel luminance value; and

correction of the gray scale values of pixels with brightness values exceeding the preset pixel brightness value.

[0013] Alternatively, this method further includes:

getting the value of the color space displayed on the screen; and

adjusting the gray scale value of each pixel on the display interface according to the color space value.

[0014] Alternatively, this method further includes:

establishing correspondence between the input values of the gray scale and the output values of the gray scale for each pixel, and the correspondence between the input value of the gray scale and the output value of the gray scale assumes that the ratio of the input value of the gray scale to the output value of the gray scale varies non-linearly or linearly with the values of the gray level, the ratio of the input value of the gray scale to the output value of the gray scale is greater than or equal to 1; and

adjusting the gray scale output value of each pixel on the display interface according to this ratio if the adjusted screen display brightness value is higher than a preset display brightness value.

[0015] In a second aspect of embodiments of the present invention, there is provided an apparatus for adjusting display brightness, comprising:

the first receiving module, configured to obtain the initial values of the gray scale of pixels on the display interface;

a conversion module configured to convert the gray scale to the original gray scale of the pixels to obtain the converted gray scale of the pixels; and

the first adjustment module, configured to adjust the gray scale values of the display interface according to the converted gray scale values of the pixels.

[0016] Alternatively, the conversion module comprises:

a receiving submodule adapted to obtain a gray scale conversion correspondence, wherein this correspondence includes transformed gray scale values corresponding to the initial gray scale values of pixels; and

a search submodule configured to search for converted gray scale values corresponding to the original gray scale values of pixels by a given correspondence.

[0017] Alternatively, the conversion module comprises:

a receiving submodule configured to obtain a conversion function for converting a gray scale; and

a calculation submodule configured to calculate the converted gray scale values of the pixels according to the conversion function and the original gray scale values of the pixels.

[0018] Alternatively, the conversion module further comprises:

a detection submodule configured to detect a current environmental brightness value; and

a selection submodule adapted to select a function or conversion to convert the gray scale according to the current brightness value of the environment;

moreover, the search submodule is configured to search for converted gray scale values corresponding to the initial values of the gray scale of the pixels, according to the correspondence; or the calculation submodule is configured to calculate the converted gray scale values corresponding to the original gray scale values of the pixels according to the conversion function.

[0019] Alternatively, the conversion module further comprises:

a receiving submodule adapted to obtain a number of bits for displaying initial gray scale values; and

a selection submodule adapted to select a correspondence or a conversion function for gray scale conversion according to the number of bits;

moreover, the search submodule is configured to search for converted gray scale values corresponding to the initial values of the gray scale of the pixels, according to the correspondence; or the calculation submodule is configured to calculate the converted gray scale values corresponding to the original gray scale values of the pixels according to the conversion function.

[0020] Alternatively, the conversion module comprises:

a detection submodule configured to detect a current environmental brightness value; and

a conversion submodule adapted to convert a gray scale to the initial values of the gray scale of the pixels to obtain converted gray scale values of the pixels if the current environmental brightness value is less than or equal to a preset environmental brightness value.

[0021] Alternatively, this device further comprises:

a first detection module, configured to detect a current brightness value of the environment;

a second correction module, configured to adjust the brightness value of the screen display according to the current brightness value of the environment; and

a first evaluation module, configured to determine a relationship between the adjusted display brightness value and the preset display brightness values;

moreover, the first adjustment module is configured to adjust the first type of gray scale values if the adjusted display brightness value is lower than the first preset display brightness value; and adjusting the second type of gray scale value if the adjusted display brightness value is higher than the second preset display brightness value.

[0022] Alternatively, this device further comprises:

a second detection module, configured to detect pixel luminance values on the display interface;

a second evaluation module, configured to evaluate whether the pixel brightness values on the display interface exceed a predetermined pixel brightness value; and

a second determination module, configured to determine pixel positions with luminance values exceeding pre-set pixel luminance values;

moreover, the first adjustment module is configured to adjust the values of the gray scale of the pixels with brightness values exceeding a predetermined pixel brightness value.

[0023] Alternatively, this device further comprises:

a second acquisition module, configured to obtain a color space value displayed on the screen;

moreover, the first adjustment module is configured to adjust the gray scale value of each pixel on the display interface according to the color space value.

[0024] Alternatively, this device further comprises:

an establishment module configured to match the input gray scale values to the gray scale output values for each pixel, the correspondence between the gray scale input value and the gray scale output value assumes that the ratio of the gray scale input value to the gray scale output value varies non-linearly or linearly with gray level values, while the ratio of the input value of the gray scale to the output value of the gray scale is greater than or equal to 1;

moreover, the first adjustment module is configured to adjust the output value of the gray scale of each pixel on the display interface according to this ratio, if the adjusted value of the brightness of the screen display is higher than the preset value of the display brightness.

[0025] In a third aspect of embodiments of the present invention, there is provided an apparatus for adjusting display brightness, comprising:

processor configured

a memory configured to store instructions executed by a processor;

moreover, the processor is configured to:

obtaining the initial values of the gray scale of pixels on the display interface;

performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels; and

adjusting the grayscale values of the display interface according to the converted grayscale values of the pixels.

[0026] The technical solutions proposed in the embodiments of the present invention may have the following beneficial effect. In conditions with extremely low brightness, the display system operates at extremely low brightness so that damage to the eyes is reduced, while the display system can adapt to an environment with low brightness due to the lack of a lighting device. In addition, it is effective for all displayed content, and not for some applications. Thus, there is no need to develop an appropriate night mode separately for the corresponding application, therefore, the size of the resource file can be reduced, memory space can be saved, operation is easily implemented, and user interaction is significantly improved.

[0027] It should be understood that both the foregoing general description and the following detailed description are illustrative and explanatory and are not intended to limit the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are included in this description and leave a part thereof, illustrate embodiments of the present invention, and together with the description, serve to explain the principles of the present invention.

[0029] FIG. 1 is a flowchart showing a method for adjusting display brightness in accordance with one embodiment of the present invention;

[0030] FIG. 2 is a flowchart showing a method for adjusting display brightness in accordance with yet another embodiment of the present invention;

[0031] FIG. 3 is a flowchart showing a method for adjusting display brightness in accordance with yet another embodiment of the present invention;

[0032] FIG. 4 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention;

[0033] FIG. 5 is a flowchart showing a method for adjusting display brightness in accordance with yet another embodiment of the present invention;

[0034] FIG. 6 is a flowchart showing a method for adjusting display brightness in accordance with yet another embodiment of the present invention;

[0035] FIG. 7a is a schematic diagram illustrating a source display interface in accordance with another embodiment of the present invention;

[0036] FIG. 7b is a schematic diagram illustrating a transformed display interface in accordance with another embodiment of the present invention;

[0037] FIG. 8 is a schematic diagram illustrating a gray scale conversion curve in accordance with another embodiment of the present invention;

[0038] FIG. 9 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention;

[0039] FIG. 10 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention;

[0040] FIG. 11 is a flowchart illustrating a method for adjusting display brightness in accordance with another embodiment of the present invention;

[0041] FIG. 12 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention;

[0042] FIG. 13 is a block diagram showing an apparatus for adjusting display brightness in accordance with another embodiment of the present invention;

[0043] FIG. 14 is a block diagram of a conversion module in accordance with one embodiment;

[0044] FIG. 15 is a block diagram of a conversion module in accordance with another embodiment;

[0045] FIG. 16 is a block diagram of a conversion module in accordance with another embodiment;

[0046] FIG. 17 is a block diagram of a conversion module in accordance with another embodiment;

[0047] FIG. 18 is a block diagram of a conversion module in accordance with another embodiment;

[0048] FIG. 19 is a block diagram showing an apparatus for adjusting display brightness in accordance with another embodiment;

[0049] FIG. 20 is a block diagram showing an apparatus for adjusting display brightness in accordance with yet another embodiment;

[0050] FIG. 21 is a block diagram showing an apparatus for adjusting display brightness in accordance with another embodiment;

[0051] FIG. 22 is a block diagram showing an apparatus for adjusting display brightness in accordance with another embodiment;

[0052] FIG. 23 is a block diagram showing an apparatus for adjusting display brightness in accordance with yet another embodiment.

DETAILED DESCRIPTION

[0053] Next, embodiments are described in detail, which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which the same numbers in different drawings refer to the same or similar elements, unless otherwise provided. The implementations set forth in the following description of embodiments do not represent all implementations corresponding to the invention. On the contrary, they are only examples of devices and methods corresponding to the aspects related to the invention and set forth in the attached claims.

[0054] In embodiments of the present invention, by changing the gray scale of the display interface at extremely low brightness, the goal is to not harm the eyes and not affect the image quality.

[0055] FIG. 1 is a flowchart showing a method for adjusting display brightness in accordance with one embodiment of the present invention. As shown in FIG. 1, a method for adjusting display brightness is applicable to the terminal and includes the following steps.

[0056] In step S11, initial values of the gray scale of pixels on the display interface are obtained.

[0057] In step S12, the gray scale is converted to the original gray scale values to obtain the converted gray scale values of the pixels.

[0058] In step S13, the grayscale values of the display interface are adjusted according to the converted grayscale values of the pixels.

[0059] In this embodiment, by adjusting the gray scale values of the display interface, the luminance and contrast ratios of the display interface can be changed so that, at low environmental brightness, the backlight passage of the display interface with reduced gray scale values is reduced, while the brightness and contrast ratios the display interface is significantly reduced, thereby achieving the goal of protecting the vision of the user using the screen. In addition, since the image quality is less affected by the decrease in the ratio of brightness and contrast of the display interface in low-brightness conditions, the image quality requirement by the user can be met, while the power consumption of the terminal is reduced, and user interaction is significantly improved.

[0060] FIG. 2 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 2, as an alternative, step S12 includes the following steps.

[0061] In step S21, a gray scale conversion correspondence is obtained, the correspondence including the converted gray scale values corresponding to the original gray scale values of the pixels.

[0062] In step S22, the converted gray scale values corresponding to the original pixel gray scale values are searched for by this correspondence.

[0063] FIG. 3 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 3, as an alternative, step S12 includes the following steps.

[0064] In step S31, a conversion function for converting a gray scale is obtained.

[0065] In step S32, the converted gray scale values of each pixel are calculated according to the conversion function and the original gray scale value of each pixel.

[0066] In an alternative solution, the correspondence of the gray scale conversion can be established in advance, and the search for the converted gray scale values corresponding to the original gray scale values of the pixels according to this correspondence can be searched. In addition, the conversion function for converting the gray scale can be set in advance, while the converted gray scale values corresponding to the original gray scale values of the pixels can be calculated according to this conversion function. Thus, the converted gray scale values can be determined quickly and accurately, while the ratio of the brightnesses and contrasts of the display interface can be adjusted to adapt the current brightness of the environment so that image quality can be guaranteed without harming the user's eyesight.

[0067] Alternatively, the above correspondence may include initial gray scale values that are randomly selected and evenly distributed, and their corresponding converted gray scale values. For example, if the original gray scale values are in the range of 0-255, the correspondence may include only converted gray scale values corresponding to ten gray scale initial values, as shown in the following Table 1.

Table 1

Initial Grayscale Converted grayscale value 0 0 25 twenty 65 45 95 55 95 75 175 95 190 105 210 90 235 155 255 170

[0068] According to the correspondence in Table 1, a gray scale conversion curve can be constructed, and then converted gray scale values corresponding to all the original gray scale values can be obtained according to the gray scale conversion curve.

[0069] FIG. 4 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 4, as an alternative, step S12 includes the following steps.

[0070] In step S41, the current ambient brightness value is detected.

[0071] In step S42, the correspondence of the conversion function according to the current environmental brightness value is selected.

[0072] In step S43, the converted gray scale values corresponding to the original pixel gray scale values are searched according to the correspondence, or the converted gray scale values corresponding to the original gray pixel scale values are calculated according to the conversion function.

[0073] In an alternative solution, the correspondence of the conversion function for gray scale conversion may be selected according to the brightness of the environment. In other words, under different conditions with different environmental brightness, various methods for converting the brightness can be used to adjust the gray scale values of the display interface. For example, when the ambient brightness is 0.001 lux, a correspondence table is selected to convert the gray scale. When the environmental brightness is 0.003 lux, the Corresponding Table is selected to convert the gray scale, and so on. At different brightness of the environment, the goals of adjusting the gray scale values of the display interface also differ. By choosing the correspondence or conversion function according to the brightness of the environment, the ratio of the brightnesses and contrasts of the display interface can always adapt to the brightness of the environment, while the user's vision can be protected to a greater extent, and the interaction with the user is greatly improved.

[0074] FIG. 5 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 5, as an alternative, step S12 includes the following steps.

[0075] In step S51, the number of bits is obtained for displaying the initial gray scale values.

[0076] In step S52, a correspondence or a conversion function is selected according to the number of bits.

[0077] In step S53, the converted gray scale values corresponding to the original pixel gray scale values are searched according to the correspondence, or the converted gray scale values corresponding to the original gray pixel scale values according to the conversion function are calculated.

[0078] In an alternative solution, the correspondence of the transform function for gray scale conversion may be selected according to the number of bits to display the original gray scale value. For example, if the gray scale values are expressed in 8 bits, the correspondence table A is selected to convert the gray scale. If the gray scale values are expressed in 10 bits, the corresponding table B is selected to convert the gray scale, and so on. Thus, gray scale adjustment can adapt to display interfaces with various display parameters, i.e. gray scale adjustment can be performed using this method for applications with various display parameters, and, therefore, this method can be widely applied.

[0079] FIG. 6 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 6, as an alternative, step S12 includes the following steps.

[0080] In step S61, the current environmental brightness value is detected.

[0081] In step S62, the gray scale is converted to the original pixel gray scale values to obtain the converted gray pixel scale values if the current environmental brightness value is less than or equal to the preset environmental brightness value.

[0082] In an alternative solution, only in cases where the environmental brightness is somewhat low, for example, the environmental brightness is less than or equal to 0.1 lux, the grayscale values of the display interface can be adjusted so that the grayscale values of the display interface often not adjusted according to the brightness of the environment, the processing ability and power consumption of the terminal can be saved, and user interaction is greatly improved.

[0083] As shown in FIG. 7a and FIG. 7b, the gray scale values of the bright portion are significantly reduced so that the backlight transmission is reduced, the overall brightness is significantly reduced, and the image contrast ratio is reduced. In an environment with low brightness, image quality is less affected by the reduction in the contrast ratio, while the requirement on the part of the user can be satisfied.

[0084] In a display processor (such as an AP display processor or DDIC), a number of conversion tables are defined. According to the corresponding conversion table, the initial gray scale values can be converted. It can be determined which conversion table is accessed according to the brightness of the environment, and then the installed conversion table is selected automatically or manually. The conversion table may be a set of numbers, and the content changes with the number of bits to display gray level values. If the gray scale values are expressed in 8 bits, the original gray scale values and the converted gray scale values in the conversion table are in the range 0-255. If the gray scale values are expressed in 10 bits, the original gray scale values and the converted gray scale values in the conversion table are in the range 0-1023.

[0085] As shown in FIG. 8, for example, the initial gray scale values are expressed by a straight line A, if curve B is selected as the conversion table, then the gray scale value of 255 is converted to a gray scale value of 175, and the 256th element of the conversion table is (175 / 255) * 255. A gray scale value of 150 is converted to a gray scale value of 90, and a number corresponding to a gray scale value of 150 in the conversion table is (90/150) * 255. In the conversion table, the eighth degree 2 or tenth degree 2 is normalized.

[0086] FIG. 9 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 9, as an alternative, this method may further include the following steps.

[0087] In step S91, the current environmental brightness value is detected.

[0088] In step S92, the brightness value of the screen display is adjusted according to the current brightness value of the environment.

[0089] In step S93, a relationship between the adjusted display brightness value and the preset display brightness values is determined.

[0090] In step S94, the first type of gray scale value is corrected if the corrected display brightness value is lower than the first preset display brightness value.

[0091] In step S95, a second type of gray scale value is corrected if the corrected display brightness value is higher than the second preset display brightness value.

[0092] When the brightness of the environment is low, the terminal first automatically adjusts the brightness of the screen display, however, the adjusted brightness of the screen display may still be too high for the user. And after the user opens some applications, the display brightness is restored to a brightness equal to the brightness before adjustment, therefore, the user interaction is unsatisfactory. In an alternative solution, after the brightness of the screen has been adjusted, it is necessary to again determine the brightness in different positions of the screen, and then the gray scale values of the parts with different brightness are accordingly adjusted to various degrees. As shown in FIG. 7a, the gray scale values of the upper part of the screen are large, i.e. the brightness is low, and therefore, it is not necessary to adjust the gray scale value. The gray scale values at the bottom of the screen are small, i.e. brightness is high, and therefore, only the grayscale values of the bottom of the screen can be adjusted. Thus, in any case, the brightness of the screen display interface can be effectively lowered, while the goal of protecting the vision of the user using the screen can be achieved.

[0093] FIG. 10 is a flowchart showing a method for adjusting display brightness in accordance with yet another embodiment of the present invention. As shown in FIG. 10, as an alternative, prior to obtaining the initial gray scale values of the pixels in the display interface, this method may further include the following steps.

[0094] In step S101, pixel luminance values are detected on the display interface.

[0095] In step S102, it is judged whether the brightness values of the pixels on the display interface exceed the preset display brightness value.

[0096] In step S103, pixel positions with luminance values exceeding a predetermined pixel luminance value are determined.

[0097] In step S104, gray scale values of the pixels with luminance values exceeding the preset pixel luminance value are adjusted.

[0098] In an alternative solution, the gray scale value of each pixel is adjusted according to the brightness of each pixel on the screen. Thus, the brightness on the screen display interface can be reduced quickly and efficiently, while the goal of protecting the vision of the user using the screen can be achieved.

[0099] FIG. 11 is a flowchart illustrating a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 11, as an alternative, this method may further include the following steps.

[00100] In step S111, a color space value displayed on the screen is obtained.

[00101] In step S112, the gray scale value of each pixel on the display interface is adjusted according to the color space value.

[00102] In an alternative solution, a color space value (i.e., a value corresponding to a range consisting of the number of colors that the screen can display in a certain color mode) displayed on the screen is further obtained, the color space values being adjusted accordingly according to different color space values. Thus, the brightness of the screen can be adjusted in such a way as to be consistent with the characteristics of the screen, while the effect of adjusting the brightness is improved, and the user's vision is better protected.

[00103] FIG. 12 is a flowchart showing a method for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 12, as an alternative, this method may further include the following steps.

[00104] In step S121, correspondence is established between the input gray scale values and the output gray scale values for each pixel, and the correspondence between the input gray scale value and the output gray scale value assumes that the ratio of the input gray scale value to the output gray scale value varies non-linearly or linearly with gray level values, while this ratio is at least 1.

[00105] In step S122, the gray scale output value of each pixel on the screen display interface is adjusted if the adjusted screen display brightness value is higher than the preset display brightness value.

[00106] In an alternative solution, the correspondence for adjusting the gray scale value may be preset, and the corrected gray scale value of the screen is higher than the gray scale value before the correction, while the brightness of the corrected screen decreases, thereby protecting the user's vision.

[00107] In this embodiment, in an environment with extremely low brightness, the display system operates at extremely low brightness so that damage to the eyes is reduced, while the display system can adapt to conditions with extremely low brightness due to the lack of a lighting device.

[00108] In addition, it is effective for all displayed content, and not for some applications. Thus, there is no need to develop an appropriate night mode separately for the corresponding application, therefore, the size of the resource file can be reduced, memory space can be saved, operation is easily implemented, and user interaction is significantly improved.

[00109] FIG. 13 is a block diagram showing an apparatus for adjusting display brightness in accordance with another embodiment of the present invention. As shown in FIG. 13, the device comprises a first acquisition module 1301, a conversion module 1302, and a first adjustment module 1303.

[00110] The first acquisition module 1301 is configured to obtain initial gray scale values of pixels on a display interface.

[00111] The conversion module 1302 is configured to convert a gray scale to the initial values of the gray scale of the pixels to obtain converted gray scale values of the pixels.

[00112] The first adjustment unit 1303 is configured to correct gray scale values of the display interface according to the converted gray scale values of the pixels.

[00113] FIG. 14 is a block diagram of a conversion module in accordance with one embodiment. As shown in FIG. 14, alternatively, the conversion module 1302 comprises a acquisition submodule 141 and a search submodule 142.

[00114] The receiving submodule 141 is configured to obtain a gray scale conversion correspondence, the correspondence including converted gray scale values corresponding to the original gray scale values of the pixels.

[00115] The search submodule 142 is configured to search for converted gray scale values corresponding to the initial gray scale values of the pixels according to this correspondence.

[00116] FIG. 15 is a block diagram of a conversion module in accordance with another embodiment. As shown in FIG. 15, as an alternative, the conversion module 1302 includes a receiving submodule 151 and a calculation submodule 152.

[00117] The receiving submodule 151 is configured to receive a conversion function for converting a gray scale.

[00118] The calculation submodule 152 is configured to calculate the converted gray scale values of the pixels according to the conversion function and the original gray scale values of the pixels.

[00119] FIG. 16 is a block diagram of a conversion module in accordance with another embodiment. As shown in FIG. 16, as an alternative, the conversion module 1302 includes a detection submodule 161, a selection submodule 162, and a search submodule 163 or a calculation submodule 164.

[00120] The detection submodule 161 is configured to detect a current environmental brightness value.

[00121] The selection submodule 162 is configured to select a correspondence or a conversion function for converting a gray scale according to the current brightness value of the environment.

[00122] The search submodule 163 is configured to determine the converted gray scale values corresponding to the original gray scale values of the pixels according to correspondence.

[00123] The calculation submodule 164 is configured to determine the converted gray scale values corresponding to the original pixel gray scale values according to the conversion function.

[00124] FIG. 17 is a block diagram of a conversion module in accordance with another embodiment. As shown in FIG. 17, alternatively, the conversion module 1302 comprises a acquisition submodule 171, a selection submodule 172, and a search submodule 173 or a calculation submodule 174.

[00125] The receiving submodule 171 is configured to obtain a number of bits to display the initial gray scale values.

[00126] The selection submodule 172 is configured to select a correspondence or a conversion function for gray scale conversion according to the number of bits.

[00127] The search submodule 173 is configured to search for converted gray scale values corresponding to the original gray scale values of the pixels according to correspondence.

[00128] The calculation submodule 174 is configured to calculate the converted gray scale values corresponding to the original pixel gray scale values according to the conversion function.

[00129] FIG. 18 is a block diagram of a conversion module in accordance with another embodiment. As shown in FIG. 18, as an alternative, the conversion module 1302 includes a detection submodule 181 and a conversion submodule 182.

[00130] The detection submodule 181 is configured to detect a current environmental brightness value.

[00131] The conversion submodule 182 is configured to convert the gray scale to the original gray scale of the pixels to obtain the converted gray scale of the pixels if the current environmental brightness value is less than or equal to the preset environmental brightness value.

[00132] FIG. 19 is a block diagram showing an apparatus for adjusting display brightness in accordance with yet another embodiment. As shown in FIG. 19, alternatively, this device further comprises a first detection module 1304, a second correction module 1305, and a first evaluation module 1306.

[00133] The first detection module 1304 is configured to detect a current environmental brightness value.

[00134] The second adjustment unit 1305 is configured to adjust the brightness value of the screen display according to the current brightness value of the environment.

[00135] The first evaluation module 1306 is configured to determine a relationship between the adjusted display brightness value and the preset display brightness values.

[00136] The first adjustment module 1303 is configured to correct the first type of gray scale values if the adjusted display brightness value is lower than the first preset display brightness value, and to adjust the second type of gray scale values if the adjusted display brightness value is higher than the second preliminarily set value for display brightness.

[00137] FIG. 20 is a block diagram showing an apparatus for adjusting display brightness in accordance with one embodiment. As shown in FIG. 20, as an alternative, this device further comprises a second detection module 1307, a second evaluation module 1308, and a determination module 1309.

[00138] The second detection module 1307 is configured to detect pixel luminance values on a display interface.

[00139] The second evaluation unit 1308 is configured to evaluate whether the pixel brightness values on the display interface exceed a predetermined pixel brightness value.

[00140] The determination unit 1309 is configured to determine pixel positions with brightness values exceeding a preset pixel brightness value.

[00141] The first adjustment unit 1303 is configured to adjust gray scale values of pixels with brightness values exceeding a predetermined pixel brightness value.

[00142] FIG. 21 is a block diagram showing an apparatus for adjusting display brightness in accordance with yet another embodiment. As shown in FIG. 21, as an alternative, this device further comprises a second acquisition module 1310.

[00143] The second acquisition module 1310 is configured to obtain a color space value displayed on a screen.

[00144] The first adjustment module 1303 is configured to adjust the gray scale value of each pixel on the display interface according to the color space value.

[00145] FIG. 22 is a block diagram showing an apparatus for adjusting display brightness in accordance with yet another embodiment. As shown in FIG. 22, as an alternative, this device further comprises an establishment module 1311.

[00146] The establishment module 1311 is configured to match the input gray scale values to the gray scale output values for each pixel, and the correspondence between the gray scale input value and the gray scale output value assumes that the ratio of the gray scale input value to the gray scale output value varies non-linearly or linearly with gray level values, while this ratio is at least 1.

[00147] The first correction module 1303 is configured to adjust the gray scale output value of each pixel on the display interface according to this ratio if the adjusted screen display brightness value is higher than the preset display brightness value.

[00148] With regard to the devices in the foregoing embodiments, specific methods for performing operations for the individual modules contained therein are described in detail in the embodiments relating to methods for adjusting display brightness, which are not repeated here.

[00149] An apparatus for adjusting display brightness in accordance with one embodiment of the present invention is provided. The device comprises a processor and memory configured to store a command executed by the processor.

[00150] The processor is configured to:

obtaining the initial values of the gray scale of pixels on the display interface;

performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels; and

adjusting the grayscale values of the display interface according to the converted grayscale values of the pixels.

[00151] FIG. 23 is a block diagram showing an apparatus 2300 for adjusting display brightness in accordance with one embodiment of the present invention. For example, device 2300 may be a mobile phone, a computer, a digital broadcast terminal, a device for sending and receiving messages, a game console, a medical device, a training device, a personal digital assistant, and so on.

[00152] In accordance with FIG. 23, device 2300 may include one or more of the following components: processing component 2302, memory 2304, power component 2306, multimedia component 2308, audio component 2310, input / output (I / O) interface 2312, sensor component 2314, and communication component 2316 .

[00153] The processing component 2302 typically controls all operations of the device 2300, such as operations related to imaging, telephone calls, information communications, camera operations, and recording operations. The processing component 2302 may comprise one or more processors 2320 for executing instructions to implement all or part of the steps in the above methods. In addition, the processing component 2302 may comprise one or more modules that facilitate interaction between the processing component 2302 and other components. For example, the processing component 2302 may include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 2302.

[00154] The memory 2304 is configured to store various types of data to support the operation of the device 2300. Examples of such data include commands for any applications or methods running on the device 2300, contact information, phone book information, messages, images, videos, etc. .d. Memory 2304 can be implemented using any type of volatile or non-volatile memory, or a combination thereof, for example, static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only storage device (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

[00155] Power component 2306 supplies power to various components of device 2300. Power component 2306 may include a power management system, one or more power supplies, and any other components associated with generating, controlling, and distributing power in device 2300.

[00156] The multimedia component 2308 includes a screen providing an output interface between the device 2300 and the user. In some embodiments, the screen may include a liquid crystal screen (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input from a user. The touch panel comprises one or more touch sensors for sensing touches, slides and gestures on the touch panel. Touch sensors can not only perceive the boundary of the action of touch or slip, but also perceive the period of time and pressure associated with the action of touch or slip. In some embodiments, the multimedia component 2308 comprises a front camera and / or a rear camera. The front camera and rear camera can receive external multimedia data when the device 2300 is in an operating mode, such as a photographing mode or a video shooting mode. Each of the front camera and the rear camera can be a system with a fixed optical lens or have the ability to focus and optical zoom.

[00157] The audio component 2310 is configured to output and / or input audio signals. For example, the audio component 2310 includes a microphone (MIC) configured to receive an external audio signal when the device 2300 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode. The received audio signal may be further stored in the memory 2304 or transmitted through the communication component 2316. In some embodiments, the audio component 2310 further comprises a speaker for outputting audio signals.

[00158] The I / O interface 2312 provides an interface between the processing component 2302 and peripheral interface modules such as a keyboard, scroll wheel, buttons, and so on. The buttons may include, but are not limited to, the home button, volume button, start button, and lock button.

[00159] The sensor component 2314 includes one or more sensors for providing status estimates of various aspects of the device 2300. For example, the sensor component 2314 can detect the open / closed state of the device 2300, the relative positioning of components, such as the display and keypad of the device 2300, change in the position of the device 2300 or component of the device 2300, the presence or absence of user contact with the device 2300, the orientation or acceleration / deceleration of the device 2300 and the temperature change of the device 2300. The sensor component 2314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 2314 may also comprise a light sensor, such as an image sensor based on a complementary metal oxide semiconductor (CMOS) structure or a charge coupled device (CCD) for use in imaging applications. In some embodiments, the sensor component 2314 may also comprise an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[00160] The communication component 2316 is configured to simplify wired or wireless communication between the device 2300 and other devices. The device 2300 can access a wireless network based on a communication standard such as Wi-Fi, 2G or 3G, or a combination thereof. In one embodiment, the communication component 2316 receives a broadcast signal or broadcast related information from an external broadcast control system via a broadcast channel. In one embodiment, the communication component 2316 further comprises a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data transfer association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[00161] In exemplary embodiments, a device 2300 may be implemented using one or more specialized integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), user programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components for implementing the above methods.

[00162] In exemplary embodiments, there is also provided a non-volatile computer-readable storage medium comprising instructions, such as those stored in memory 2304, executed by a processor 2320 in an apparatus 2300 for implementing the above methods. For example, the non-volatile computer-readable storage medium may be ROM, random access memory (RAM), read-only memory on compact discs (CD-ROM), magnetic tape, flexible disk, optical storage device, and so on.

[00163] A persistent computer-readable storage medium is provided. When the processor executes the instructions of the mobile terminal in the storage medium, the mobile terminal may implement a method for adjusting the display brightness. This method includes:

obtaining the initial values of the gray scale of the pixel on the display interface;

performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values; and

adjusting the grayscale values of the display interface according to the converted grayscale values of the pixels.

[00164] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

obtaining a gray scale conversion correspondence, wherein this correspondence includes transformed gray scale values corresponding to the initial gray scale values of pixels; and

a search for the converted gray scale values corresponding to the original gray scale values of the pixels according to the given correspondence.

[00165] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

obtaining a conversion function for converting a gray scale; and

calculating the converted pixel gray scale values according to the conversion function and the original pixel gray scale values.

[00166] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted pixel gray scale values includes:

detection of the current value of the brightness of the environment;

selection of a correspondence or conversion function for gray scale conversion according to the current value of the environmental brightness; and

searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or calculating the converted gray scale values corresponding to the original gray pixel scale values according to the conversion function.

[00167] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

getting the number of bits to display the original gray scale values;

selection of a correspondence or conversion function for gray scale conversion according to the number of bits; and

searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or calculating the converted gray scale values corresponding to the original gray pixel scale values according to the conversion function.

[00168] Alternatively, performing gray scale conversion on the original pixel gray scale values to obtain the converted gray pixel scale values includes:

detection of the current value of the brightness of the environment; and

performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels if the current value of the brightness of the environment is less than or equal to a preset value of the brightness of the environment.

[00169] Alternatively, this method further includes:

detection of the current value of the brightness of the environment;

adjusting the brightness value of the screen display according to the current brightness value of the environment;

determining a relationship between the adjusted display brightness value and the preset display brightness values;

adjusting the first type of gray scale value if the adjusted display brightness value is lower than the first preset display brightness value; and

adjusting the second type of gray scale value if the adjusted display brightness value is higher than the second preset display brightness value.

[00170] Alternatively, this method further includes:

detecting pixel brightness values on a display interface;

an assessment of whether the brightness values of the pixels on the display interface exceed the preset display brightness value;

determining pixel positions with luminance values exceeding a predetermined pixel luminance value;

adjustment of the gray scale values of pixels with certain positions.

[00171] Alternatively, this method further includes:

getting the value of the color space displayed on the screen; and

adjusting the gray scale value of each pixel on the display interface according to the color space value.

[00172] Alternatively, this method further includes:

establishing correspondence between the input values of the gray scale and the output values of the gray scale for each pixel, and the correspondence between the input value of the gray scale and the output value of the gray scale assumes that the ratio of the input value of the gray scale to the output value of the gray scale varies non-linearly or linearly with the values of the gray level, the ratio of the input value of the gray scale to the output value of the gray scale is greater than or equal to 1; and

adjusting the gray scale output value of each pixel on the display interface according to this ratio if the adjusted screen display brightness value is higher than a preset display brightness value.

[00173] As a result of the analysis of the description and implementation of the invention described herein, other embodiments of the present invention will be apparent to those skilled in the art. This application covers all options, applications or modifications of the invention arising from its basic principles and including such deviations from the present invention, relating to known or generally accepted practice. The description and examples should be considered only as illustrative, while the scope and essence of the invention are indicated in the following claims.

[00174] It should be understood that the present invention is not limited to the specific structure that is described above and illustrated in the accompanying drawings, and that various modifications and changes may take place within its scope. It is intended that the scope of the invention be limited only by the appended claims.

Claims (88)

1. A method for adjusting display brightness, comprising the steps of: get the initial values of the gray scale of the pixels on the display interface; performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels; and adjust grayscale values of the display interface according to the converted grayscale values of pixels; moreover, after the brightness is adjusted, it is again necessary to determine the brightness in various positions of the display, and then the gray scale values of the parts with different brightness are accordingly adjusted to various degrees; and the gray scale values of each pixel are adjusted according to the brightness of each pixel on the display. 2. The method according to p. 1, characterized in that the conversion of the gray scale on the initial values of the gray scale of pixels to obtain the converted values of the gray scale of pixels contains the steps in which: obtaining a gray scale conversion correspondence, wherein this correspondence includes transformed gray scale values corresponding to the initial gray scale values of pixels; and search for the converted gray scale values corresponding to the original gray scale values of the pixels according to this correspondence. 3. The method according to p. 1, characterized in that the conversion of the gray scale on the initial values of the gray scale of pixels to obtain the converted values of the gray scale of pixels contains the steps in which: receive a conversion function for converting the gray scale; and calculating the converted gray scale values of the pixels according to the conversion function and the original gray scale values of the pixels. 4. The method according to p. 2 or 3, characterized in that the conversion of the gray scale on the initial values of the gray scale of pixels to obtain the converted values of the gray scale of pixels contains the steps in which: detect the current value of the brightness of the environment; selecting a correspondence or conversion function to convert the gray scale according to the current value of the brightness of the environment; and searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or the converted gray scale values corresponding to the original gray pixel scale values are calculated according to the conversion function. 5. The method according to p. 2 or 3, characterized in that the conversion of the gray scale on the initial values of the gray scale of pixels to obtain the converted values of the gray scale of pixels contains the steps in which: get the number of bits to display the original gray scale values; selecting a correspondence or conversion function for gray scale conversion according to the number of bits; and searching for the converted gray scale values corresponding to the original pixel gray scale values according to correspondence, or the converted gray scale values corresponding to the original gray pixel scale values are calculated according to the conversion function. 6. The method according to p. 1, characterized in that the conversion of the gray scale on the initial values of the gray scale of pixels to obtain the converted values of the gray scale of pixels contains the steps in which: detect the current value of the brightness of the environment; and performing the conversion of the gray scale on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels if the current value of the brightness of the environment is less than or equal to a preset value of the brightness of the environment. 7. The method according to claim 1, further comprising stages in which: detect the current value of the brightness of the environment; adjust the brightness value of the screen display according to the current value of the brightness of the environment; determining a relationship between the adjusted display brightness value and the preset display brightness values; correcting the first type of gray scale value if the adjusted display brightness value is lower than the first preset display brightness value; and correct the second type of gray scale values if the adjusted display brightness value is higher than the second preset display brightness value. 8. The method according to claim 7, further comprising stages in which: detect pixel brightness values on the display interface; evaluating whether the pixel brightness values on the display interface exceed a predetermined pixel brightness value; determining pixel positions with luminance values exceeding a predetermined pixel luminance value; and adjust the values of the gray scale of pixels with brightness values exceeding the preset pixel brightness value. 9. The method according to p. 1, further comprising stages in which: get the value of the color space displayed on the screen; and adjust the gray scale value of each pixel on the display interface according to the color space value. 10. The method according to any one of paragraphs. 7-9, further comprising stages in which: establish correspondence between the input values of the gray scale and the output values of the gray scale for each pixel, and the correspondence between the input value of the gray scale and the output value of the gray scale assumes that the ratio of the input value of the gray scale to the output value of the gray scale varies non-linearly or linearly with the values of the gray level, the ratio of the input value of the gray scale to the output value of the gray scale is greater than or equal to 1; and adjust the gray scale output value of each pixel on the display interface according to this ratio if the adjusted screen display brightness value is higher than a preset display brightness value. 11. A device for adjusting display brightness, comprising: the first receiving module, configured to obtain the initial values of the gray scale of pixels on the display interface; a conversion module configured to convert the gray scale to the original gray scale of the pixels to obtain the converted gray scale of the pixels; and a first adjustment unit configured to adjust gray scale values of the display interface according to the converted gray scale values of the pixels; moreover, after the brightness is adjusted, it is again necessary to determine the brightness in various positions of the display, and then the gray scale values of the parts with different brightness are accordingly adjusted to various degrees; and the gray scale values of each pixel are adjusted according to the brightness of each pixel on the display. 12. The device according to p. 11, and the conversion module contains: a receiving submodule adapted to obtain a gray scale conversion correspondence, wherein this correspondence includes transformed gray scale values corresponding to the initial gray scale values of pixels; and a search submodule configured to search for converted gray scale values corresponding to the original gray scale values of pixels by a given correspondence. 13. The device according to p. 11, and the conversion module contains: a receiving submodule configured to obtain a conversion function for converting a gray scale; and a calculation submodule configured to calculate the converted gray scale values of the pixels according to the conversion function and the original gray scale values of the pixels. 14. The device according to p. 12 or 13, wherein the conversion module further comprises: a detection submodule configured to detect a current environmental brightness value; and a selection submodule adapted to select a function or conversion to convert the gray scale according to the current brightness value of the environment; moreover, the search submodule is configured to search for converted gray scale values corresponding to the initial values of the gray scale of the pixels, according to the correspondence; or the calculation submodule is configured to calculate the converted gray scale values corresponding to the original gray scale values of the pixels according to the conversion function. 15. The device according to p. 12 or 13, wherein the conversion module further comprises: a receiving submodule adapted to obtain a number of bits for displaying initial gray scale values; and a selection submodule adapted to select a correspondence or a conversion function for gray scale conversion according to the number of bits; moreover, the search submodule is configured to search for converted gray scale values corresponding to the initial values of the gray scale of the pixels, according to the correspondence; or the calculation submodule is configured to calculate the converted gray scale values corresponding to the original gray scale values of the pixels according to the conversion function. 16. The device according to p. 11, and the conversion module contains: a detection submodule configured to detect a current environmental brightness value; and a conversion submodule adapted to convert a gray scale to the initial values of the gray scale of the pixels to obtain converted gray scale values of the pixels if the current environmental brightness value is less than or equal to a preset environmental brightness value. 17. The device according to claim 11, further comprising: a first detection module, configured to detect a current brightness value of the environment; a second correction module, configured to adjust the brightness value of the screen display according to the current brightness value of the environment; and a first evaluation module, configured to determine a relationship between the adjusted display brightness value and the preset display brightness values; moreover, the first adjustment module is configured to adjust the first type of gray scale values if the adjusted display brightness value is lower than the first preset display brightness value; and adjusting the second type of gray scale value if the adjusted display brightness value is higher than the second preset display brightness value. 18. The device according to p. 17, further comprising: a second detection module, configured to detect pixel luminance values on the display interface; a second evaluation module, configured to evaluate whether the pixel brightness values on the display interface exceed a predetermined pixel brightness value; and a second determination module, configured to determine pixel positions with luminance values exceeding pre-set pixel luminance values; moreover, the first adjustment module is configured to adjust the values of the gray scale of the pixels with brightness values exceeding a predetermined pixel brightness value. 19. The device according to claim 11, further comprising: a second acquisition module, configured to obtain a color space value displayed on the screen; moreover, the first adjustment module is configured to adjust the gray scale value of each pixel on the display interface according to the color space value. 20. The device according to any one of paragraphs. 17-19, further comprising: an establishment module configured to match the input gray scale values to the gray scale output values for each pixel, the correspondence between the gray scale input value and the gray scale output value assumes that the ratio of the gray scale input value to the gray scale output value varies non-linearly or linearly with gray level values, while the ratio of the input value of the gray scale to the output value of the gray scale is greater than or equal to 1; moreover, the first adjustment module is configured to adjust the output value of the gray scale of each pixel on the display interface according to this ratio, if the adjusted value of the brightness of the screen display is higher than the preset value of the display brightness. 21. A device for adjusting display brightness, comprising: CPU; a memory configured to store instructions executed by a processor; moreover, the processor is configured to: obtaining the initial values of the gray scale of pixels on the display interface; performing gray scale conversion on the initial values of the gray scale of the pixels to obtain the converted values of the gray scale of the pixels; and adjusting the grayscale values of the display interface according to the converted grayscale values of the pixels; moreover, after the brightness is adjusted, it is again necessary to determine the brightness in various positions of the display, and then the gray scale values of the parts with different brightness are accordingly adjusted to various degrees; and the gray scale values of each pixel are adjusted according to the brightness of each pixel on the display.

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