Gamma correction method, correction device and related equipment

Abstract

The present invention provides a gamma correction method, correction device and related equipment, comprising: determining whether the brightness value of each monochrome sub-pixel picture at a corresponding gray scale meets a preset gamma correction requirement; if at least one monochrome sub-pixel picture does not meet the requirement, adjusting the initialization voltage of each monochrome sub-pixel, and / or adjusting the functional relationship of a first line segment of a target gamma curve of a display device, and / or adjusting the voltage value of the monochrome sub-pixel at each gray scale of a second line segment of a target gamma curve of the display device; and performing gamma correction on the display device according to the brightness value of a white picture of the display device and an initial target gamma curve or an adjusted target gamma curve, so that the gamma correction requirement of the monochrome sub-pixel picture can be taken into account while the gamma curve of the display device meets the requirement, thereby improving the display effect of the display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a Gamma correction method, a correction device and related equipment. Background Art

[0002] Before a display device leaves the factory, it will be gamma-calibrated to adjust the gamma curve of the display device to the required target gamma curve to improve the display effect of the display screen seen by the human eye. The gamma curve represents the proportional relationship between the input signal and the output brightness of the display device at each grayscale.

[0003] However, currently gamma correction is performed based on the brightness values ​​of the white screen at each grayscale obtained by mixing and displaying the sub-pixels of each color of the display device according to the white balance ratio. It is unable to take into account the gamma correction effect of the monochrome screen obtained when the sub-pixels of each color are displayed separately, resulting in the gamma correction effect of the monochrome screen failing to meet the requirements. Summary of the invention

[0004] In view of this, the present invention is dedicated to providing a gamma correction method, correction device and related equipment, which performs gamma correction based on the brightness value of the white picture while taking into account the gamma correction effect of each monochrome picture.

[0005] In a first aspect, the present invention provides a gamma correction method, comprising:

[0006] Determine whether the brightness value of each monochrome sub-pixel image of the display device at the corresponding grayscale meets the preset Gamma correction requirements;

[0007] If the brightness value of at least one monochrome sub-pixel image at the corresponding grayscale does not meet the Gamma correction requirement, then adjust the initialization voltage of each monochrome sub-pixel, and / or adjust the functional relationship of the first line segment of the target Gamma curve of the display device, and / or adjust the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve of the display device;

[0008] Gamma correction is performed on the display device according to the brightness value of the white screen of the display device and the initial target Gamma curve or the adjusted target Gamma curve; the white screen is the screen when all monochrome sub-pixels in the display device are displayed simultaneously.

[0009] Optionally, if the brightness value of at least one monochrome sub-pixel image at a corresponding grayscale does not meet the Gamma correction requirement, adjusting the initialization voltage of each monochrome sub-pixel, and / or adjusting the functional relationship of a first line segment of a target Gamma curve of the display device, and / or adjusting the voltage value of the monochrome sub-pixel at each grayscale of a second line segment of the target Gamma curve of the display device, comprises:

[0010] If the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirement, adjust the initialization voltage of each monochrome sub-pixel, and / or adjust the functional relationship of the first line segment of the target Gamma curve of the display device;

[0011] If the brightness values ​​of some monochrome sub-pixel images at corresponding grayscales do not meet the Gamma correction requirement, the voltage values ​​of the monochrome sub-pixels at each grayscale of the second line segment of the target Gamma curve of the display device are adjusted.

[0012] Optionally, if the brightness values ​​of all monochrome sub-pixel images at corresponding grayscales do not meet the gamma correction requirement, adjusting the initialization voltage of each monochrome sub-pixel, and / or adjusting the functional relationship of the first line segment of the target gamma curve of the display device, includes:

[0013] If the brightness values ​​of all monochrome sub-pixels at the corresponding grayscale do not meet the Gamma correction requirement, adjusting the initialization voltage of each monochrome sub-pixel;

[0014] Determining whether each monochrome sub-pixel image of the display device meets the gamma correction requirement;

[0015] If the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale still do not meet the Gamma correction requirement, the functional relationship of the first line segment of the target Gamma curve of the display device is adjusted.

[0016] Optionally, before determining whether the brightness value of each monochrome sub-pixel image of the display device at a corresponding grayscale meets a preset Gamma correction requirement, the method further includes:

[0017] Gamma correction is performed on the display device according to the brightness value of the white screen of the display device and an initial target Gamma curve.

[0018] Optionally, adjusting the initialization voltage of each monochrome sub-pixel includes:

[0019] The initialization voltage of each monochrome sub-pixel is adjusted from a first voltage value to a second voltage value, wherein the second voltage value is greater than the first voltage value.

[0020] Optionally, the functional relationship of adjusting the first line segment of the target gamma curve of the display device includes:

[0021] According to the gamma correction requirement, determining the position of the first line segment of the target gamma curve;

[0022] The functional relationship of the first line segment at the determined position is adjusted to a linear functional relationship.

[0023] Optionally, adjusting the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve includes:

[0024] According to the gamma correction requirement, determining the position of the second line segment of the target gamma curve;

[0025] In each grayscale of the second line segment at the determined position, the voltage value of the monochrome sub-pixel of the next grayscale is adjusted to the voltage value of the monochrome sub-pixel of the previous grayscale.

[0026] In a second aspect, the present invention provides a gamma correction device, comprising:

[0027] A determination module, used to determine whether the brightness value of each monochrome sub-pixel image of the display device at the corresponding gray scale meets the preset Gamma correction requirement;

[0028] An adjustment module, configured to adjust the initialization voltage of each monochrome sub-pixel when the brightness value of at least one monochrome sub-pixel image at a corresponding grayscale does not meet the Gamma correction requirement, and / or adjust the functional relationship of the first line segment of the target Gamma curve of the display device, and / or adjust the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve of the display device;

[0029] A correction module is used to perform gamma correction on the display device according to the brightness value of the white screen of the display device and the initial target gamma curve or the adjusted target gamma curve; the white screen is the screen when all monochrome sub-pixels in the display device are displayed simultaneously.

[0030] In a third aspect, the present invention provides an electronic device, comprising:

[0031] A memory for storing at least one set of instructions;

[0032] A processor is used to execute the at least one set of instructions to perform the Gamma correction method for a display device as described in any one of the above items.

[0033] In a fourth aspect, the present invention provides a readable storage medium, wherein the readable storage medium stores at least one set of instructions, and the at least one set of instructions is used to enable a processor to execute the gamma correction method for a display device as described in any one of the above items.

[0034] The gamma correction method, correction device and related equipment provided by the present invention determine whether the brightness value of each monochrome sub-pixel screen of the display device at the corresponding gray scale meets the preset gamma correction requirement. If the brightness value of at least one monochrome sub-pixel screen at the corresponding gray scale does not meet the gamma correction requirement, the initialization voltage of each monochrome sub-pixel is adjusted, and / or the functional relationship of the first line segment of the target gamma curve of the display device is adjusted, and / or the voltage value of the monochrome sub-pixel at each gray scale of the second line segment of the target gamma curve of the display device is adjusted, and the display device is gamma corrected according to the brightness value of the white screen of the display device and the initial target gamma curve or the adjusted target gamma curve, so that the gamma correction can be performed based on the brightness value of the white screen of the display device, so that the gamma curve of the display device meets the requirements while taking into account the gamma correction requirements of each monochrome sub-pixel screen, thereby further improving the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0036] Figure 1 A flowchart of a gamma correction method provided by an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure of a pixel circuit of a display device provided by an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of an initial target Gamma curve provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of a target Gamma curve after functional relationship adjustment provided by an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of an initialization voltage and a target Gamma curve after the functional relationship is adjusted according to an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of a target Gamma curve after the initialization voltage, the functional relationship and the grayscale voltage value are adjusted according to an embodiment of the present invention;

[0042] Figure 7 A schematic diagram of the structure of a gamma correction device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] At present, different grayscales are used to represent different brightness levels from the darkest to the brightest. The larger the grayscale, the higher the brightness, and the smallest the grayscale, the lower the brightness. In addition, the more grayscales there are, the more delicate the picture that the display device can present. Usually, an 8it display device has 0 to 255 grayscales, that is, 256 grayscales.

[0045] Ideally, after inputting the same voltage value at each grayscale to different display devices, the brightness values ​​at each grayscale output by different display devices are the same. That is, ideally, the proportional relationship between the input signal and the output brightness of different display devices is the same, or in other words, the gamma curves of different display devices are the same.

[0046] However, in reality, due to the influence of differentiation factors such as process fluctuations, the display performance of different display devices is different, that is, after the same voltage value at each grayscale is input to different display devices, the brightness values ​​at each grayscale output by different display devices are different. Based on this, it is necessary to calibrate the gamma curves of different display devices.

[0047] In addition, since the human eye's perception of brightness changes nonlinearly, that is, the human eye's perception of low brightness is greater than its perception of high brightness, in order to improve the effect of the display image viewed by the human eye, it is also necessary to correct the Gamma curve of the display device to a nonlinear Gamma curve that meets the needs of changes in human eye perception.

[0048] Currently, the gamma curve of the display device is calibrated to a unified target gamma curve. The gamma value of the target gamma curve is generally between 2.2 and 2.5. In addition, the gamma correction is currently performed based on the brightness value of the white screen at each grayscale obtained by mixing and displaying the sub-pixels of each color of the display device according to the white balance ratio.

[0049] However, due to the influence of process factors and white balance ratio, the gamma correction effect of the white screen is not equivalent to the gamma correction effect of each monochrome screen. Therefore, the current gamma correction method cannot take into account the gamma correction effect of each monochrome screen, resulting in the gamma correction effect of the monochrome screen failing to meet the requirements.

[0050] For example, after gamma correction is performed based on the brightness value of the white screen at each grayscale, the grayscale of the monochrome screen is 30. If the grayscale of the monochrome screen is required to be 15, the gamma correction effect of the monochrome screen cannot meet the requirement. The grayscale of the starting brightness refers to the grayscale of the initial brightness of the display device that can be perceived by the human eye when it switches from black to white.

[0051] Based on this, the present invention provides a gamma correction scheme, which adjusts the initialization voltage of each monochrome sub-pixel according to the gamma correction requirements of the monochrome picture, and / or adjusts the functional relationship of the corresponding line segment of the target gamma curve of the display device, and / or adjusts the voltage value of the monochrome sub-pixel at each grayscale in the corresponding line segment of the target gamma curve, so as to take into account the gamma correction requirements of each monochrome picture.

[0052] As an optional implementation of the content disclosed in the present invention, an embodiment of the present invention provides a gamma correction method for performing gamma correction on a display device. The display device may be a liquid crystal display device, an LED display device, an OLED display device, or the like.

[0053] like Figure 1 As shown, Figure 1 A flowchart of a gamma correction method provided by an embodiment of the present invention, the gamma correction method comprising:

[0054] S101: Determine whether the brightness value of each monochrome sub-pixel image of the display device at the corresponding grayscale meets the preset Gamma correction requirement; if the brightness value of at least one monochrome sub-pixel image at the corresponding grayscale does not meet the Gamma correction requirement, proceed to S102;

[0055] Among them, each monochrome sub-pixel picture refers to the picture when each color sub-pixel in the display device is displayed separately. For example, each monochrome sub-pixel is a red sub-pixel, a green sub-pixel and a blue sub-pixel, then when the red sub-pixel, the green sub-pixel and the blue sub-pixel are displayed separately, the monochrome sub-pixel pictures are red pictures, green pictures and blue pictures respectively. Among them, a device such as a light intensity detector can be used to detect the brightness value of the picture displayed by the display device.

[0056] The gamma correction requirement includes the brightness requirement of each monochrome sub-pixel image at at least one grayscale. For example, the preset gamma correction requirement is that the grayscale of each monochrome sub-pixel image is 15, that is, the brightness value of each monochrome sub-pixel image at grayscale 15 is required to reach the brightness that the human eye can perceive.

[0057] S102: If the brightness value of at least one monochrome sub-pixel image at the corresponding grayscale does not meet the gamma correction requirement, adjust the initialization voltage of each monochrome sub-pixel, and / or adjust the functional relationship of the first line segment of the target gamma curve of the display device, and / or adjust the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target gamma curve of the display device;

[0058] Since the characteristics, aperture ratios, and luminous efficiencies of sub-pixels of different colors are different, the brightness values ​​of sub-pixels of different colors at different grayscales are also different. Therefore, without adjusting the brightness values ​​of the monochrome sub-pixel images at the corresponding grayscale, the brightness values ​​of different monochrome sub-pixel images at the corresponding grayscales cannot simultaneously meet the same Gamma correction requirements. It may happen that the brightness values ​​of some monochrome sub-pixel images at the corresponding grayscale meet the Gamma correction requirements, the brightness values ​​of some monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirements, and the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirements.

[0059] If the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale meet the Gamma correction requirements, there is no need to correct each monochrome sub-pixel image. If the brightness value of at least one monochrome sub-pixel image at the corresponding grayscale does not meet the Gamma correction requirements, the brightness values ​​of each monochrome sub-pixel image at the corresponding grayscale can be adjusted by adjusting the initialization voltage of each monochrome sub-pixel, and / or adjusting the functional relationship of the first line segment of the target Gamma curve of the display device, and / or adjusting the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve of the display device, so that the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale can meet the Gamma correction requirements. Among them, the voltage value of the monochrome sub-pixel can be the voltage value received by the anode of the monochrome sub-pixel.

[0060] S103: performing gamma correction on the display device according to the brightness value of the white screen of the display device and the initial target gamma curve or the adjusted target gamma curve.

[0061] The white picture is a picture when all the monochrome sub-pixels in the display device are displayed simultaneously. For example, a white picture is obtained when red sub-pixels, green sub-pixels and blue sub-pixels are displayed simultaneously. It is understandable that red sub-pixels, green sub-pixels and blue sub-pixels of different grayscales can be mixed to obtain white pixels of different grayscales, and multiple white pixels in the display device can constitute a white picture.

[0062] In an embodiment of the present invention, if the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale can meet the gamma correction requirements only by adjusting the initialization voltage of each monochrome sub-pixel, then after adjusting the initialization voltage of each monochrome sub-pixel, the display device can be gamma corrected according to the brightness values ​​of the white image of the display device at each grayscale and the initial target gamma curve.

[0063] If the brightness values ​​of all monochrome sub-pixel images at corresponding grayscales meet the gamma correction requirements by adjusting the initialization voltages of each monochrome sub-pixel, adjusting the functional relationship of the first segment of the target gamma curve of the display device, and / or adjusting the voltage values ​​of the monochrome sub-pixels at each grayscale of the second segment of the target gamma curve of the display device, then it is necessary to perform gamma correction on the display device according to the brightness values ​​of the white image of the display device at each grayscale and the adjusted target gamma curve.

[0064] In an embodiment of the present invention, after determining whether the brightness values ​​of each monochrome sub-pixel screen of the display device at the corresponding grayscale meet the preset Gamma correction requirements, if the brightness value of at least one monochrome sub-pixel screen at the corresponding grayscale does not meet the Gamma correction requirements, the initialization voltage of each monochrome sub-pixel is adjusted, and / or the functional relationship of the first line segment of the target Gamma curve of the display device is adjusted, and / or the voltage value of the monochrome sub-pixel of the corresponding grayscale of the target Gamma curve of the display device is adjusted, and the display device is Gamma corrected according to the brightness values ​​of the white screen of the display device at each grayscale and the target Gamma curve, so that Gamma correction can be performed based on the brightness values ​​of the white screen of the display device at each grayscale, so that the Gamma curve of the display device meets the requirements while taking into account the Gamma correction requirements of each monochrome sub-pixel screen, thereby further improving the display effect of the display device.

[0065] In some embodiments of the present invention, after the display device is manufactured, the brightness values ​​of each monochrome sub-pixel screen of the display device at the corresponding gray scale can be measured, and it can be determined whether the brightness values ​​of each monochrome sub-pixel screen of the display device at the corresponding gray scale meet the preset Gamma correction requirements.

[0066] Among them, measuring the brightness value of each monochrome sub-pixel image of the display device at the corresponding gray scale includes: applying a voltage value at the corresponding gray scale to each monochrome sub-pixel of the display device, and then measuring the brightness value at the corresponding gray scale when the display device displays the monochrome sub-pixel image of each color.

[0067] Of course, the present invention is not limited to this. In other embodiments, after the display device is manufactured and the display device is gamma-corrected according to the brightness value of the white screen of the display device and the initial target gamma curve, the brightness value of each monochrome sub-pixel screen of the display device at the corresponding gray scale can be measured, and it can be determined whether the brightness value of each monochrome sub-pixel screen of the display device at the corresponding gray scale meets the preset gamma correction requirement.

[0068] Since the brightness value of at least one monochrome sub-pixel screen at the corresponding grayscale does not meet the Gamma correction requirement, including that the brightness values ​​of all monochrome sub-pixel screens at the corresponding grayscale do not meet the Gamma correction requirement, and the brightness values ​​of some monochrome sub-pixel screens at the corresponding grayscale do not meet the Gamma correction requirement, therefore, in some embodiments of the present invention, when the brightness values ​​of all monochrome sub-pixel screens at the corresponding grayscale do not meet the Gamma correction requirement, by adjusting the initialization voltage of each monochrome sub-pixel, and / or adjusting the functional relationship of the first line segment of the target Gamma curve of the display device, the brightness value of each monochrome sub-pixel screen at the corresponding grayscale is synchronously adjusted to reduce the adjustment time and improve the adjustment efficiency; when the brightness values ​​of some monochrome sub-pixel screens at the corresponding grayscale do not meet the Gamma correction requirement, by adjusting the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve of the display device, the brightness value of some monochrome sub-pixel screens at the corresponding grayscale is accurately adjusted.

[0069] On this basis, in some embodiments of the present invention, if the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale do not meet the gamma correction requirements, the initialization voltage of each monochrome sub-pixel can be adjusted first, and then it is determined whether each monochrome sub-pixel image of the display device meets the gamma correction requirements; if the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale still do not meet the gamma correction requirements, the functional relationship of the first segment of the target gamma curve of the display device is adjusted; if the brightness values ​​of some monochrome sub-pixel images at the corresponding grayscale do not meet the gamma correction requirements, the voltage values ​​of some monochrome sub-pixels at each grayscale of the second segment of the target gamma curve of the display device are adjusted.

[0070] Of course, in other embodiments, if the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirements, the functional relationship of the first line segment of the target Gamma curve of the display device can be adjusted first, and then it is determined whether each monochrome sub-pixel image of the display device meets the Gamma correction requirements. If the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale still do not meet the Gamma correction requirements, the initialization voltage of each monochrome sub-pixel is adjusted. If the brightness values ​​of some monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirements, the voltage values ​​of some monochrome sub-pixels at each grayscale of the second line segment of the target Gamma curve of the display device are adjusted.

[0071] It should be noted that, in some specific embodiments, the initialization voltage of each monochrome sub-pixel can be adjusted multiple times, and the functional relationship of the first line segment of the target Gamma curve of the display device can be adjusted multiple times until the brightness value of at least one monochrome sub-pixel image at the corresponding grayscale meets the Gamma correction requirements.

[0072] In some embodiments of the present invention, adjusting the initialization voltage of each monochrome sub-pixel includes: adjusting the initialization voltage of each monochrome sub-pixel from a first voltage value to a second voltage value, wherein the second voltage value is greater than the first voltage value.

[0073] like Figure 2 As shown, Figure 2 A schematic diagram of the structure of a pixel circuit of a display device provided by an embodiment of the present invention, wherein the pixel circuit is used to provide a voltage signal to a sub-pixel OLED. The Vdata voltage controls the voltage of the anode of the sub-pixel OLED by controlling the output current of the driving transistor, thereby controlling the sub-pixel OLED to emit light of corresponding brightness. Different voltage values ​​of the Vdata voltage correspond to the voltage values ​​received by the sub-pixel OLED at different grayscales.

[0074] Vref is an initialization voltage. Before transmitting the Vdata voltage to the anode of the sub-pixel OLED, the initialization voltage Vref needs to be transmitted to the anode of the sub-pixel OLED so that the initialization voltage Vref and the residual voltage of the anode are offset to achieve initialization of the anode.

[0075] By adjusting the initialization voltage Vref of the sub-pixel OLED from the first voltage value to the second voltage value, that is, by increasing the initialization voltage Vref of the sub-pixel OLED, the initialization efficiency of the anode of the sub-pixel OLED can be improved, and the brightness value of the sub-pixel OLED can be improved, thereby improving the brightness value of each monochrome sub-pixel image, and further making the brightness value of each monochrome sub-pixel image meet the Gamma correction requirements.

[0076] For example, the gamma correction requirement is that the starting grayscale of the brightness value of each monochrome sub-pixel screen at the corresponding grayscale is 15 grayscale, and the starting grayscale of the brightness value of each monochrome sub-pixel screen at the corresponding grayscale of the display device is 30 grayscale. In this case, the initialization voltage of each monochrome sub-pixel can be increased from about -4V to about -2V.

[0077] Of course, the present invention is not limited to this. In other embodiments, the initialization voltage of each monochrome sub-pixel may be lowered. The initialization voltage adjustment method of each monochrome sub-pixel may be specifically set according to the Gamma correction requirement, which will not be described in detail here.

[0078] In some embodiments of the present invention, adjusting the functional relationship of the first line segment of the target gamma curve of the display device includes: determining the position of the first line segment of the target gamma curve according to the gamma correction requirements; and adjusting the functional relationship of the first line segment at the determined position to a linear functional relationship.

[0079] For example, the gamma correction requirement is that the starting grayscale in the brightness value of each monochrome sub-pixel image at the corresponding grayscale is 15 grayscale, and the starting grayscale in the brightness value of each monochrome sub-pixel image at the corresponding grayscale of the display device is 30 grayscale, then the position of the first line segment is determined to be between 0 grayscale and 30 grayscale, and then the functional relationship of the line segment between 0 grayscale and 30 grayscale of the target gamma curve can be adjusted to a linear functional relationship, and the functional relationship of the line segment of other grayscales of the target gamma curve, that is, between 31 grayscale and 255 grayscale, remains unchanged, and is still a nonlinear functional relationship, such as a nonlinear functional relationship of a gamma curve with a gamma equal to 2.2.

[0080] like Figure 3 As shown, Figure 3The schematic diagram of the initial target Gamma curve provided by an embodiment of the present invention, the functional relationship of the line segment of the target Gamma curve between 0 grayscale and 255 grayscale is a nonlinear functional relationship. Figure 4 As shown, Figure 4 A schematic diagram of a target Gamma curve after functional relationship adjustment is provided for an embodiment of the present invention. The functional relationship of the target Gamma curve between grayscale 0 and grayscale 30 is a linear functional relationship, and the functional relationship of the target Gamma curve between grayscale 31 and grayscale 255 is a nonlinear functional relationship. The starting grayscale of each monochrome sub-pixel screen, i.e., the blue screen, the green screen, and the red screen, is changed from grayscale 30 to grayscale 25.

[0081] Based on this, by adjusting the functional relationship of the line segment between grayscale 0 and grayscale 30 to a linear functional relationship, the brightness value between grayscale 0 and grayscale 30 can be increased, so that the brightness value less than grayscale 30 can reach the starting brightness value.

[0082] In some embodiments of the present invention, the functional relationship of the first line segment of the target Gamma curve of the display device can be directly adjusted, or the functional relationship of the first line segment of the target Gamma curve of the display device can be adjusted based on adjusting the initialization voltage of each monochrome sub-pixel, or the initialization voltage of each monochrome sub-pixel can be adjusted based on adjusting the functional relationship of the first line segment of the target Gamma curve of the display device. Figure 5 As shown, Figure 5 A schematic diagram of a target Gamma curve after the initialization voltage and the functional relationship are adjusted according to an embodiment of the present invention, wherein the starting grayscale of each monochrome sub-pixel screen, namely the blue screen, the green screen and the red screen, is changed from 30 grayscales to 15 grayscales.

[0083] In some embodiments of the present invention, adjusting the voltage value of each grayscale of the second line segment of the target Gamma curve includes: determining the position of the second line segment of the target Gamma curve according to the Gamma correction requirements; and adjusting the voltage value of the monochrome sub-pixel of the latter grayscale in each grayscale of the second line segment at the determined position to the voltage value of the monochrome sub-pixel of the previous grayscale.

[0084] For example, if the gamma correction requirement is that the starting grayscale of each monochrome sub-pixel screen in the brightness value at the corresponding grayscale is grayscale 15, and the starting grayscale of each monochrome sub-pixel screen in the brightness value at the corresponding grayscale of the display device is grayscale 30, then the position of the second line segment is determined to be between grayscale 0 and grayscale 30, and then the voltage value of the monochrome sub-pixel of the latter grayscale from grayscale 0 to grayscale 30 can be adjusted to the voltage value of the monochrome sub-pixel of the previous grayscale. For example, the voltage value of grayscale 30 is assigned to grayscale 29, and the voltage value of grayscale 29 is assigned to grayscale 28, and so on.

[0085] Of course, in some specific embodiments, the voltage value of the grayscale can be adjusted according to the grayscale binding points of the Gamma curve. For example, the grayscale binding points from 0 grayscale to 30 grayscale are 0 grayscale, 2 grayscale, 4 grayscale, 6 grayscale...30 grayscale, respectively. Then the voltage value of the latter grayscale is adjusted to the voltage value of the previous grayscale, that is, the voltage value of 30 grayscale is assigned to 28 grayscale, the voltage value of 28 grayscale is assigned to 26 grayscale, and so on, until the voltage value of 2 grayscale is assigned to 0 grayscale.

[0086] Based on this, adjusting the voltage value of the next grayscale to the voltage value of the previous grayscale can increase the voltage value of the previous grayscale, i.e., the low grayscale, and thus increase the brightness value of the low grayscale, so that the brightness value of the low grayscale, such as grayscale 15, can reach the starting brightness value.

[0087] In some embodiments of the present invention, the voltage value at each gray scale of the monochrome sub-pixel image of the corresponding color can be adjusted by adjusting the value of the register at each gray scale corresponding to the sub-pixel of any color. For example, the voltage value of the next gray scale can be adjusted to the voltage value of the previous gray scale by assigning the value of the register of the next gray scale to the register of the previous gray scale.

[0088] In some embodiments of the present invention, the voltage values ​​of each gray scale of the second segment of the target Gamma curve can be directly adjusted, or the voltage values ​​of each gray scale of the second segment of the target Gamma curve can be further adjusted based on adjusting the initialization voltage of each monochrome sub-pixel and / or adjusting the functional relationship of the first segment of the target Gamma curve of the display device.

[0089] like Figure 6 As shown, Figure 6 A schematic diagram of a target Gamma curve after the initialization voltage, function relationship and grayscale voltage value are adjusted provided for an embodiment of the present invention, wherein the starting grayscale of each monochrome sub-pixel screen, i.e., the blue screen, the green screen and the red screen, is changed from 30 grayscales to 5 grayscales.

[0090] It should be noted that, in some embodiments of the present invention, when performing gamma correction on the display device according to the brightness value of the white screen of the display device and the initial target gamma curve or the adjusted target gamma curve, the voltage value received by the anode of the sub-pixel can be adjusted to adjust the proportional relationship between the voltage value and the brightness value, thereby adjusting the gamma curve of the display device. Of course, the present invention is not limited to this. In other embodiments, the gamma curve of the display device can also be adjusted by other methods, such as adjusting the initialization voltage, which will not be repeated here.

[0091] As another optional implementation of the content disclosed in the present invention, an embodiment of the present invention provides a gamma correction device for performing gamma correction on a display device. Figure 7 As shown, Figure 7 A schematic diagram of the structure of a gamma correction device provided by an embodiment of the present invention, the gamma correction device comprising:

[0092] A determination module 70 is used to determine whether the brightness value of each monochrome sub-pixel image of the display device at a corresponding gray scale meets a preset Gamma correction requirement;

[0093] An adjustment module 71 is used to adjust the initialization voltage of each monochrome sub-pixel when the brightness value of at least one monochrome sub-pixel image at a corresponding grayscale does not meet the Gamma correction requirement, and / or adjust the functional relationship of the first line segment of the target Gamma curve of the display device, and / or adjust the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target Gamma curve of the display device;

[0094] The correction module 72 is used to perform gamma correction on the display device according to the brightness value of the white screen of the display device and the initial target gamma curve or the adjusted target gamma curve; the white screen is the screen when all monochrome sub-pixels in the display device are displayed simultaneously.

[0095] The gamma correction device provided by the present invention, after the determination module 70 determines whether the brightness values ​​of each monochrome sub-pixel screen of the display device at the corresponding grayscale meet the preset gamma correction requirements, if the brightness value of at least one monochrome sub-pixel screen at the corresponding grayscale does not meet the gamma correction requirements, the adjustment module 71 adjusts the initialization voltage of each monochrome sub-pixel, and / or adjusts the functional relationship of the first line segment of the target gamma curve of the display device, and / or adjusts the voltage value of the monochrome sub-pixel at each grayscale of the second line segment of the target gamma curve of the display device, and the correction module 72 performs gamma correction on the display device according to the brightness values ​​of the white screen of the display device at each grayscale and the target gamma curve, so that gamma correction can be performed based on the brightness values ​​of the white screen of the display device at each grayscale, so that the gamma curve of the display device meets the requirements while taking into account the gamma correction requirements of each monochrome sub-pixel screen, thereby further improving the display effect of the display device.

[0096] In some embodiments of the present invention, the adjustment module 71 is used to adjust the initialization voltage of each monochrome sub-pixel when the brightness values ​​of all monochrome sub-pixel images at the corresponding gray scale do not meet the gamma correction requirements, and / or adjust the functional relationship of the first line segment of the target gamma curve of the display device; when the brightness values ​​of some monochrome sub-pixel images at the corresponding gray scale do not meet the gamma correction requirements, adjust the voltage values ​​of the monochrome sub-pixels at each gray scale of the second line segment of the target gamma curve of the display device.

[0097] In some embodiments of the present invention, the adjustment module 71 is used to adjust the initialization voltage of each monochrome sub-pixel when the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale do not meet the Gamma correction requirements, and then send a determination instruction to the determination module 70, so that the determination module 70 determines whether each monochrome sub-pixel image of the display device meets the Gamma correction requirements, and when the brightness values ​​of all monochrome sub-pixel images at the corresponding grayscale still do not meet the Gamma correction requirements, adjust the functional relationship of the first line segment of the target Gamma curve of the display device.

[0098] In some embodiments of the present invention, before the determination module 70 determines whether the brightness values ​​of each monochrome sub-pixel image of the display device at the corresponding gray scale meet the preset gamma correction requirements, the correction module 72 is also used to perform gamma correction on the display device according to the brightness values ​​of the white image of the display device at each gray scale and the initial target gamma curve.

[0099] In some embodiments of the present invention, the adjusting module 71 adjusts the initialization voltage of each monochrome sub-pixel including:

[0100] The initialization voltage of each monochrome sub-pixel is adjusted from a first voltage value to a second voltage value, wherein the second voltage value is greater than the first voltage value.

[0101] In some embodiments of the present invention, the functional relationship of the first line segment of the target gamma curve of the display device adjusted by the adjustment module 71 includes:

[0102] According to the gamma correction requirements, determine the position of the first line segment of the target gamma curve;

[0103] The functional relationship of the first line segment at the determined position is adjusted to a linear functional relationship.

[0104] In some embodiments of the present invention, the adjusting module 71 adjusts the voltage value of each gray scale of the second line segment of the target Gamma curve by:

[0105] According to the gamma correction requirements, determine the position of the second line segment of the target gamma curve;

[0106] In each grayscale of the second line segment at the determined position, the voltage value of the monochrome sub-pixel of the next grayscale is adjusted to the voltage value of the monochrome sub-pixel of the previous grayscale.

[0107] As another optional implementation of the disclosure of the present invention, an embodiment of the present invention provides an electronic device, which may be a terminal device or a server device, etc. The electronic device includes:

[0108] A memory for storing at least one set of instructions;

[0109] A processor is used to execute at least one set of instructions to perform the gamma correction method provided in any of the above embodiments.

[0110] As another optional implementation of the contents disclosed in the present invention, an embodiment of the present invention provides a readable storage medium, which stores at least one set of instructions, and the at least one set of instructions is used to enable a processor to execute the gamma correction method provided in any of the above embodiments.

[0111] The readable storage media of the embodiments of the present invention include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be host-readable instructions, data structures, modules of programs, or other data. Examples of the host's storage media include, but are not limited to, phase change memory (PAM), static random access memory (SAM), dynamic random access memory (DAM), other types of random access memory (AM), read-only memory (OM), electrically erasable programmable read-only memory (EEPOM), flash memory or other memory technology, read-only compact disk read-only memory (CD-OM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0112] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts refer to the method part description. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A gamma correction method, characterized in that: include: Determine whether the brightness value of each monochrome picture of the display device at the corresponding gray scale meets the preset Gamma correction requirement; each monochrome picture is a picture when the sub-pixels of each color in the display device are displayed separately; If the brightness values ​​of all monochrome images at the corresponding grayscale do not meet the Gamma correction requirement, adjusting the initialization voltages of the sub-pixels of each color, and adjusting the functional relationship of the first line segment of the target Gamma curve of the display device; If the brightness value of the partial monochrome picture at the corresponding grayscale does not meet the gamma correction requirement, adjust the voltage value at each grayscale of the second line segment of the target gamma curve of the display device, the voltage value is the voltage value received by the sub-pixel of the corresponding color of the partial monochrome picture; the first line segment and the second line segment are determined according to the gamma correction requirement; Gamma correction is performed on the display device according to the brightness value of the white screen of the display device and an initial or adjusted target Gamma curve; the white screen is a screen when sub-pixels of various colors in the display device are displayed simultaneously.

2. The gamma correction method according to claim 1, characterized in that: If the brightness values ​​of all monochrome images at corresponding grayscales do not meet the Gamma correction requirement, adjusting the initialization voltages of the sub-pixels of each color and adjusting the functional relationship of the first line segment of the target Gamma curve of the display device include: If the brightness values ​​of all monochrome images at corresponding grayscales do not meet the Gamma correction requirement, adjusting the initialization voltages of the sub-pixels of each color; Determining whether each monochrome picture of the display device meets the gamma correction requirement; If the brightness values ​​of all monochrome images at corresponding grayscales still do not meet the Gamma correction requirement, the functional relationship of the first line segment of the target Gamma curve of the display device is adjusted.

3. The gamma correction method according to claim 1, characterized in that: Before determining whether the brightness value of each monochrome picture of the display device at the corresponding gray scale meets the preset Gamma correction requirement, the method further includes: Gamma correction is performed on the display device according to the brightness value of the white screen of the display device and an initial target Gamma curve.

4. The gamma correction method according to claim 1, characterized in that: The adjusting the initialization voltage of the sub-pixel of each color comprises: The initialization voltage of the sub-pixel of each color is adjusted from a first voltage value to a second voltage value, wherein the second voltage value is greater than the first voltage value.

5. The gamma correction method according to claim 1, characterized in that: The functional relationship of adjusting the first line segment of the target Gamma curve of the display device includes: According to the gamma correction requirement, determining the position of the first line segment of the target gamma curve; The determined functional relationship of the first line segment at the position is adjusted to a linear functional relationship.

6. The gamma correction method according to claim 1, characterized in that: The step of adjusting the voltage value of each gray scale of the second line segment of the target Gamma curve comprises: According to the gamma correction requirement, determining the position of the second line segment of the target gamma curve; Among the gray levels of the second line segment at the determined position, the voltage value of the next gray level is adjusted to the voltage value of the previous gray level.

7. A gamma correction device, characterized in that: include: A determination module, used to determine whether the brightness value of each monochrome picture of the display device at a corresponding gray scale meets a preset Gamma correction requirement; each monochrome picture is a picture when a sub-pixel of each color in the display device is displayed separately; An adjustment module, configured to adjust the initialization voltages of the sub-pixels of each color and the functional relationship of the first line segment of the target Gamma curve of the display device when the brightness values ​​of all the monochrome images at the corresponding grayscale do not meet the Gamma correction requirements; when the brightness values ​​of some of the monochrome images at the corresponding grayscale do not meet the Gamma correction requirements, adjust the voltage values ​​of the second line segment of the target Gamma curve of the display device at each grayscale, the voltage values ​​being the voltage values ​​received by the sub-pixels of the corresponding colors of the some of the monochrome images; the first line segment and the second line segment are determined according to the Gamma correction requirements; A correction module is used to perform gamma correction on the display device according to the brightness value of the white screen of the display device and the initial or adjusted target gamma curve; the white screen is the screen when sub-pixels of various colors in the display device are displayed simultaneously.

8. An electronic device, characterized in that: include: A memory for storing at least one set of instructions; A processor, configured to execute the at least one set of instructions to perform the gamma correction method as described in any one of claims 1 to 6.

9. A readable storage medium, characterized in that: The readable storage medium stores at least one set of instructions, and the at least one set of instructions is used to enable a processor to execute the gamma correction method according to any one of claims 1 to 6.

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