CN113936596A - Gamma debugging method, gamma debugging device, computer equipment and display device - Google Patents

Gamma debugging method, gamma debugging device, computer equipment and display device Download PDF

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CN113936596A
CN113936596A CN202111242415.6A CN202111242415A CN113936596A CN 113936596 A CN113936596 A CN 113936596A CN 202111242415 A CN202111242415 A CN 202111242415A CN 113936596 A CN113936596 A CN 113936596A
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gamma
gray scale
debugging
gray
value
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CN113936596B (en
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穆鑫
张家祥
王明强
白久园
胡宏锦
方远�
左堃
张斌
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The invention provides a gamma debugging method, a gamma debugging device, computer equipment and a display device, relates to the technical field of display, and can improve the phenomenon of color cast of the display device. The gamma debugging method comprises the following steps: for at least part of the gamma segments, the whole gray scale range comprises at least two continuous gray scale intervals; for each gray scale interval, acquiring target brightness of a plurality of bound gray scale values in the gray scale interval according to a gamma curve with a set gamma value; according to the sequence that the gray scale values are gradually increased, the set gamma values adopted by at least two gray scale intervals are gradually increased; performing gamma debugging on a plurality of binding gray scale values in the gray scale intervals according to a target debugging specification and target brightness of the plurality of binding gray scale values in the gray scale intervals for each gray scale interval except the gray scale interval comprising the highest gray scale value; wherein the target debug specification is less than the reference debug specification. The gamma debugging method can be applied to a gamma debugging device, computer equipment and a display device.

Description

Gamma debugging method, gamma debugging device, computer equipment and display device
Technical Field
The invention relates to the technical field of display, in particular to a gamma debugging method, a gamma debugging device, computer equipment and a display device.
Background
An OLED (Organic Light-Emitting Diode) Display device has a self-Light Emitting characteristic, and has advantages of purer Display in a black screen and higher brightness contrast ratio compared with an LCD (Liquid Crystal Display) Display device. The OLED display device is widely used, and in order to make the display effect of the OLED display device conform to the visual perception of human eyes, gamma tuning (gamma tuning) is required for the OLED display device.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a gamma debugging method, a gamma debugging device, computer equipment and a display device, so as to improve the phenomenon of color cast of the display device.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, for at least a part of a gamma segment, a whole gray scale range includes at least two continuous gray scale intervals, and in two adjacent gray scale intervals, a maximum gray scale value of a relatively lower gray scale interval is smaller than a minimum gray scale value of a relatively higher gray scale interval.
The gamma debugging method comprises the following steps: for each gray scale interval, acquiring target brightness of a plurality of binding gray scale values in the gray scale interval according to a gamma curve with a set gamma value; according to the sequence that the gray-scale values are gradually increased, the set gamma values adopted by the at least two gray-scale intervals are gradually increased, and the maximum set gamma value is the reference gamma value.
Performing gamma debugging on a plurality of binding gray-scale values in the gray-scale intervals according to a target debugging specification and target brightness of the plurality of binding gray-scale values in the gray-scale intervals for each gray-scale interval except the gray-scale interval comprising the highest gray-scale value; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
In the gamma debugging method provided by the embodiment of the invention, when the target brightness is calculated, the target brightness of the whole gray scale in other gray scale intervals except the gray scale interval comprising the highest gray scale value can be improved for other gray scale intervals except the gray scale interval comprising the highest gray scale value, and further, when the gamma debugging is carried out, the target debugging specification smaller than the reference debugging specification is adopted to debug the low gray stage, so that the debugged brightness is closer to the target brightness, the color cast phenomenon is further improved, and the image quality of the low gray scale is improved. In the folding mobile phone which utilizes the linkage display of the two screens, when the two screens simultaneously display one picture, the display effect can be greatly improved due to smaller color cast under low gray scale.
In some embodiments, the entire gray scale range includes two gray scale intervals, which are a first gray scale interval and a second gray scale interval, respectively, the first gray scale interval adopts a set gamma value as a first gamma value, the second gray scale interval adopts a set gamma value as a second gamma value, the first gamma value is smaller than the second gamma value, and the second gamma value is the reference gamma value.
In some embodiments, the maximum gray scale value of the first gray scale section is located in the middle region of the entire gray scale range.
In some embodiments, the entire gray scale range includes three gray scale intervals, which are a third gray scale interval, a fourth gray scale interval and a fifth gray scale interval, where the set gamma value adopted by the third gray scale interval is a third gamma value, the set gamma value adopted by the fourth gray scale interval is a fourth gamma value, and the set gamma value adopted by the fifth gray scale interval is a fifth gamma value, where the third gamma value is smaller than the fourth gamma value, the fourth gamma value is smaller than the fifth gamma value, and the fifth gamma value is the reference gamma value.
In some embodiments, before the gamma debugging, for each gray scale interval other than the gray scale interval including the highest gray scale value, a plurality of bound gray scale values in the gray scale interval according to a target debugging specification and a target brightness of the bound gray scale values in the gray scale interval, the method further includes: and setting an initial debugging specification. And acquiring the target debugging specification according to the initial debugging specification.
In some embodiments, the obtaining the target debug specification according to the initial debug specification specifically includes: and carrying out gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of a plurality of binding gray scale values in the gray scale interval.
And on the basis of successful gamma debugging, gradually reducing the debugging specification to carry out gamma debugging on the bound gray level value in the gray level interval on the basis of the initial debugging specification until the gamma debugging fails, and determining the debugging specification adopted by the previous gamma debugging as the target debugging specification.
In some embodiments, the obtaining the target debug specification according to the initial debug specification specifically includes: and carrying out gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of a plurality of binding gray scale values in the gray scale interval.
And on the basis of gamma debugging failure, gradually increasing the debugging specification to carry out gamma debugging on the bound gray level value in the gray level interval on the basis of the initial debugging specification until the gamma debugging is passed, and determining the debugging specification adopted by the current gamma debugging as the target debugging specification.
In some embodiments, the gamma debugging method further comprises: and for the gray scale interval comprising the highest gray scale value, carrying out gamma debugging on the plurality of binding gray scale values in the gray scale interval according to a set debugging specification and the target brightness of the plurality of binding gray scale values in the gray scale interval.
In some embodiments, the set gamma value ranges from 2.0 to 2.4.
In some embodiments, after performing gamma debugging on a plurality of bound gray scale values in the gray scale interval according to a set debugging specification and a target brightness of the gray scale interval for the gray scale interval including the highest gray scale value, the method further includes:
and burning the driving voltage corresponding to each gray scale value in the whole gray scale range in the gamma debugging process into a driving chip of the display device.
A second aspect of the present invention provides a gamma debugging apparatus, which is used in any one of the above gamma debugging methods, and includes: the device comprises a target brightness acquisition module and a gamma debugging module. For each gray scale interval, the target brightness acquisition module is used for acquiring the target brightness of a plurality of binding gray scale values of each gray scale interval according to a gamma curve with a set gamma value; according to the sequence that the gray-scale values are gradually increased, the set gamma values adopted by the at least two gray-scale intervals are gradually increased, and the maximum set gamma value is the reference gamma value. The target acquisition module is connected with the target debugging module, and the target debugging module is used for carrying out target debugging on a plurality of binding gray-scale values in the gray-scale intervals according to target debugging specifications and target brightness of the gray-scale intervals for each gray-scale interval except the gray-scale interval comprising the highest gray-scale value; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
The beneficial effects that can be achieved by the gamma debugging device provided by the invention are the same as those achieved by the gamma debugging method provided by the first aspect, and are not repeated herein.
A third aspect of the present invention provides a computer apparatus comprising: a processor and a memory, the memory storing computer program instructions that, when executed by the processor, cause the processor to perform any of the gamma debugging methods provided above.
The beneficial effects that the computer device provided by the present invention can achieve are the same as those that the gamma debugging method provided by the first aspect can achieve, and are not described herein again.
A fourth aspect of the present invention provides a display device comprising: the display device comprises a display panel and a driving chip, wherein the driving chip is internally burned with driving voltage corresponding to each gray-scale value in the whole gray-scale range during gamma debugging, and the driving chip drives the display panel to emit light according to the driving voltage, so that the corresponding relation between each gray-scale value in the whole gray-scale range and display brightness meets a gamma curve during gamma debugging in any one of the gamma debugging methods under the condition that the display panel is in an appointed gamma section.
The beneficial effects that the display device provided by the present invention can achieve are the same as those that the gamma debugging method provided by the first aspect can achieve, and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a gamma debugging method according to an embodiment of the present invention;
FIG. 2 is another flowchart of a gamma debugging method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a gamma debugging method according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a gamma adjustment method according to another embodiment of the present invention;
FIG. 5 is another flowchart of a gamma adjustment method according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a gamma adjustment method according to an embodiment of the present invention;
FIG. 7A is a schematic diagram of a gamma curve obtained by the gamma adjustment method according to the embodiment of the invention;
FIG. 7B is a schematic diagram of another gamma curve obtained by the gamma adjustment method according to the embodiment of the invention;
FIG. 7C is a schematic diagram of a gamma curve used in a gamma adjustment method provided in the related art;
FIG. 8 is a schematic diagram of a GCS obtained by a gamma debugging method according to an embodiment of the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8;
FIG. 10 is a block diagram of a gamma debugging apparatus according to an embodiment of the present invention;
FIG. 11 is a block diagram of a computer device provided by an embodiment of the present invention;
fig. 12 is a structural diagram of a display device according to an embodiment of the present invention;
fig. 13 is another structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The sensitivity of human eyes to the brightness in a darker environment is much higher than the sensitivity of human eyes to the brightness in a brighter environment, and thus the relationship between human eyes' perception and brightness is not a linear relationship. For example, the brightness is increased by 2 times, but the human eye cannot sense the brightness increased by two times, can sense the brightness increased by a little, and when the brightness is increased by 8 times or even higher, the human eye can sense the brightness increased by 2 times compared with the original brightness. Therefore, in order to make the display effect of the display device conform to the visual perception of human eyes, gamma tuning (gamma tuning) needs to be performed on the display device. Specifically, the display device may be gamma-debugged before being shipped from a factory, so as to determine a required driving voltage for each gray level of the display device at each gamma band.
For example, the display device may be an OLED display device, a Micro Organic Light-Emitting Diode (Micro OLED) display device, a Quantum Dot Organic Light-Emitting Diode (QLED) display device, or the like, and the display device is an OLED display device. As shown in fig. 13, the OLED display device 300 is, for example, a mobile phone, a tablet computer, etc., which are not listed here. The gamma of the OLED display device 300 is generally set to a plurality of gamma bands (gamma segments), and in the case of a mobile phone, the gamma of the mobile phone is generally set to 13 gamma segments, wherein the gamma segments include 1 HBM (high brightness mode), three AODs (always on display), and 9 nor modes (Normal mode), wherein 9 nor may be named as nor1 and nor2 … … nor9 in sequence, and each gamma segment of the 13 gamma segments has a specified number of gray levels, and the brightness of each gray level in each gamma segment is different from the brightness of each gray level in other gamma segments.
The gray scale refers to the brightness of a color from deep to light, and the more the brightness of a color changes, the more the gray scale. The gray scale level of the display is mainly determined by the digital-to-analog conversion bit number of the system, for example, an 8-bit processing system has 2 gray scales of 8 power, i.e., 256 gray scales, that is, 256 brightness changes from black to white. In addition, the gray scale level of the display can be 64, 512, 1024, etc., which are not listed here. The invention is described by taking an example that a display picture has 256 levels of gray scales, wherein the 256 levels of gray scales are W0-W255 from small to large.
When the gamma is debugged, each gamma section needs to be debugged, each gray-scale value has corresponding brightness, and the brightness corresponding to the gray-scale value is gradually increased according to the sequence that the gray-scale value is gradually increased. Specifically, the higher the gray scale is, the higher the brightness is, and the lower the gray scale is, the higher the brightness is, each gamma segment of the 13 gamma segments has its highest set brightness, and the highest set brightness is the brightness corresponding to the highest gray scale value under each gamma segment. The correspondence between the gray levels and the brightness can be represented by a gamma curve, in which the abscissa represents the gray level value input to the pixel and the ordinate represents the brightness value corresponding to the pixel in the schematic diagram of the gamma curve shown in fig. 7C. In order to make the display effect of the display device conform to the visual perception of human eyes, the relationship between the input gray scale and the corresponding brightness value needs to be set such that the brightness value is proportional to the gamma power of the gray scale, and such relationship between the gray scale brightness value and the gray scale is called the gamma curve of the display device. Illustratively, the value of γ is set to 2.2 ± 0.2 so that the displayed picture is close to the picture actually seen by human eyes. Gamma tuning (gamma tuning) of a display device is performed based on a gamma curve having a set gamma value (e.g., 2.2) over the entire gray scale range, target luminances corresponding to respective gray scales are calculated from the gamma curve having the set gamma value (e.g., 2.2), and actual luminances (also referred to as tuning luminances) corresponding to the respective gray scales are tuned based on the target luminance values, so that the actual luminances corresponding to the same gray scale are identical to the target luminances. In some embodiments, the target brightness of the bound gray-scale values may also be calculated according to a gamma curve with a set gamma value (e.g., 2.2), where the number of the bound gray-scale values is multiple, and the multiple bound gray-scale values are some specific gray-scale values in the whole gray-scale range, the actual brightness of the bound gray-scale values is adjusted according to the target brightness value, and then the actual brightness of other gray-scale values is obtained according to the actual brightness of the bound gray-scale values.
Compared with low brightness, under the condition of high brightness, the display picture is less influenced by the brightness of the external environment, so that when gamma debugging is carried out, the actual brightness corresponding to each gray scale is relatively easy to reach the target brightness value in a higher gray scale range, and the actual brightness corresponding to each gray scale is relatively not easy to reach the target brightness value in a lower gray scale range, so that the needed debugging times are more, the debugging time is longer, and the debugging is difficult to pass, therefore, the debugging specifications (tuning spec) required by different gray scale ranges during the gamma debugging are different.
For example, the higher the grayscale range, the smaller the debugging specification required for performing gamma debugging, and the lower the grayscale range, the larger the debugging specification required for performing gamma debugging. The debugging specification can be understood as a debugging error in a gamma debugging process, for example, in a certain gamma section, the target brightness corresponding to 256 gray scales is 4.9nit (nit), the required debugging specification of the 256 gray scales is set to be 0.5%, the debugging brightness obtained after the 256 gray scales are subjected to gamma debugging is in a range of 4.9 +/-0.0245 nit, the debugging specification can determine the deviation between the debugging brightness obtained after the gamma debugging and the target brightness, the larger the debugging specification is, the larger the deviation is, the larger the color deviation is, the smaller the debugging specification is, the smaller the deviation is, and the smaller the color deviation is. Generally, in order to enable the low gray scale to be successfully debugged during gamma debugging, the debugging specification required by the low gray scale needs to be relaxed, the debugging specification of the gray scale value smaller than 256 gray scales is usually greater than 0.5%, and the debugging specification of 1 gray scale can be 5% as an example.
Thus, the result of gamma debugging is that the low gray scale has a wider debugging specification, which causes a larger deviation between the actual brightness and the target brightness obtained when each gray scale value in the low gray scale range is subjected to gamma debugging, so that the color cast exists in the picture. Especially, in a folding mobile phone which utilizes two screens to display in a linkage manner, when two screens display one picture at the same time, obvious color cast exists under low gray scale, and the display effect is seriously influenced.
Based on this, some embodiments of the present invention provide a gamma debugging method, which can divide the whole gray scale range into at least two gray scale intervals, and debug the whole gray scale range by a segmented debugging method, specifically, the multiple binding gray scale values in the at least two gray scale intervals use different set gamma values to calculate the target brightness, and the gamma values used in the gray scale intervals gradually increase according to the sequence of increasing gray scale, wherein the set gamma value used in the gray scale interval having the highest gray scale value is a reference gamma value, and then the gamma debugging is performed on the multiple binding gray scale values in each gray scale interval except for the highest gray scale value, and when performing the gamma debugging, the target debugging specification used in the multiple binding gray scale values in each gray scale interval except for the highest gray scale value is smaller than the reference debugging specification, and the reference debugging specification is, and adopting the reference gamma value to carry out the required debugging specification when carrying out gamma debugging on the plurality of binding gray-scale values in the gray-scale interval.
As shown in fig. 1 to 4, in the above gamma debugging method, the whole gray scale range of at least a part of the gamma segments in the plurality of gamma segments needs to be divided into gray scale intervals, for at least a part of the gamma segments, the whole gray scale range includes at least two continuous gray scale intervals, and in two adjacent gray scale intervals, the maximum gray scale value of the relatively lower gray scale interval is smaller than the minimum gray scale value of the relatively higher gray scale interval. The display device 300 is provided with a plurality of gamma segments, some or all of the gamma segments may be gamma-debugged by using the gamma debugging method provided by some embodiments of the present invention, and the number of the gamma segments for gamma debugging by using the gamma debugging method provided by some embodiments of the present invention may be one or more, or all of the gamma segments.
In some examples, in the case that the display device 300 is a mobile phone, in the nor1 and nor2 … … nor9 modes, only the highest set brightness of the nor9 mode is lower, where the highest set brightness is the set brightness of the highest grayscale, and therefore the brightness of the low grayscale of the nor9 mode is lower, and the low grayscale is gamma-debugged by using the relaxed tunning spec, so that the obtained picture is more color-biased, and therefore, the gamma debugging method provided by some embodiments of the present invention can be used for debugging only the nor9 mode. The highest set brightness of the other modes is higher, and the brightness of the low gray scale in the corresponding mode is also higher, so that color cast is not obvious, and therefore, the other modes do not need to be debugged by the gamma debugging method provided by some embodiments of the invention. In other examples, in some display devices 300, there may be a plurality of gamma segments with low target brightness, and therefore, the gamma debugging method provided by some embodiments of the present invention may be applied to the plurality of gamma segments. In addition, since the difference in the manufacturing process of the display device 300 may cause the display device 300 to have color cast even when the target brightness is high, in this case, the gamma adjustment method provided by some embodiments of the present invention may be applied to all the gamma segments to perform the gamma adjustment.
The whole gray scale range can be divided into at least two gray scale intervals, specifically, the whole gray scale range can be divided into two gray scale intervals, and can also be divided into three gray scale intervals or even more gray scale intervals, which are not listed herein. In the two adjacent gray scale intervals, the maximum gray scale value in the smaller gray scale interval and the minimum gray scale value in the larger gray scale interval are two adjacent gray scale values. Illustratively, the entire gray scale range includes 256 gray scales, wherein the first gray scale interval is 1 to 128 gray scales, and the second gray scale interval is 129 to 256 gray scales. The maximum gray scale value 128 of the first gray scale interval is smaller than the minimum gray scale value 129 of the second gray scale interval.
Specifically, as shown in fig. 1 to 4, the gamma debugging method includes:
s1, for each gray scale interval, acquiring target brightness of a plurality of binding gray scale values in the gray scale interval according to a gamma curve with a set gamma value; according to the sequence that the gray-scale values are gradually increased, the set gamma values adopted by the at least two gray-scale intervals are gradually increased, and the maximum set gamma value is the reference gamma value.
In some embodiments, only a plurality of binding gray values may be subjected to gamma debugging. When gamma debugging is performed on a gamma section of which the whole gray scale range is divided into a plurality of gray scale intervals, target brightness of a plurality of binding gray scale values in each gray scale interval needs to be obtained, and the binding gray scale values are arranged in each gray scale interval. Illustratively, 256 gray-scale values are provided in the entire gray-scale range, 11 binding gray-scale values may be provided in the entire gray-scale range, and the 11 binding gray-scale values are respectively 1 gray-scale, 33 gray-scale, 65 gray-scale, 97 gray-scale, 128 gray-scale, 129 gray-scale, 154 gray-scale, 179 gray-scale, 204 gray-scale, 229 gray-scale, and 256 gray-scale, wherein the number of binding gray-scale values and the gray-scale value of each binding gray-scale value may be adjusted according to specific requirements.
When the target brightness is calculated, the set gamma values adopted by the at least two gray scale sections are different, and the set gamma value adopted by each gray scale section is gradually increased according to the sequence that the gray scale value is gradually increased, so that the set gamma value adopted by the gray scale section with the maximum gray scale value is the maximum, and the maximum set gamma value is defined as the reference gamma value. Since the target brightness obtained by the gamma curve with the lower set gamma value is higher than the target brightness obtained by the gamma curve with the higher set gamma value for the same gray scale, such as the gamma curve diagram shown in fig. 7A, curve a is the gamma curve with the whole gray scale range adopting the gamma value of 2.0 to calculate the target brightness, and curve B is the gamma curve with the whole gray scale range adopting the gamma value of 2.4 to calculate the target brightness, it can be seen that the target brightness of each gray scale obtained according to the gamma curve with the set gamma value of 2.0 is higher than the target brightness of each gray scale obtained according to the gamma curve with the set gamma value of 2.4, the gamma value adopted in each gray scale interval is gradually increased according to the sequence of gradually increasing gray scale values, that is, compared with the same set gamma value adopted in the whole gray scale range, the corresponding set gamma value of the low gray scale interval is smaller, the obtained target brightness is larger, namely the target brightness of a plurality of binding gray-scale values in the low gray-scale interval is improved. For example, the entire gray scale range may be divided into N gray scale sections, where N is a positive integer greater than or equal to 2, where the N gray scale sections are a1 st gray scale section, … …, and an nth gray scale section, gray scale values of the 1 st gray scale section to the N-1 st gray scale section gradually increase, a maximum gray scale value is in the nth gray scale section, and when calculating the target brightness, a set gamma value used in the nth gray scale section is the largest, that is, the set gamma value used in the nth gray scale section is the reference gamma value.
For example, the gray scale range may be divided into 3 gray scale sections, the set gamma value used in the 3 rd gray scale section is the largest, and the set gamma value used in the 3 rd gray scale section is the reference gamma value.
S2, carrying out gamma debugging on a plurality of binding gray-scale values in the gray-scale intervals according to target debugging specifications and target brightness of the plurality of binding gray-scale values in the gray-scale intervals for each gray-scale interval except the gray-scale interval comprising the highest gray-scale value; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
In the case that the entire gray scale range is divided into N gray scale sections, the other gray scale sections except the gray scale section including the highest gray scale value (nth gray scale section) may include the 1 st gray scale section to the N-1 st gray scale section. Before gamma debugging is carried out, reference debugging specifications of a plurality of binding gray scale values in all gray scale intervals except the Nth gray scale interval need to be determined, and specifically, the reference debugging specifications are debugging specifications required by each binding gray scale value in the 1 st gray scale interval to the N-1 st gray scale interval when gamma debugging is carried out on the 1 st gray scale interval to the N-1 st gray scale interval by using the reference gamma values. For example, in the related art, a gamma curve with a gamma value of 2.2 is used for the whole gray scale range to obtain the corresponding target brightness, 2.2 is the reference gamma value, and in the 1 st gray scale interval, the debugging specification of 1 gray scale is 5%, and 5% is the reference debugging specification. Wherein different binding gray-scale values may correspond to different reference debug specifications, and different binding gray-scale values may correspond to different target debug specifications.
Determining the reference debug specification may determine the target debug specification for each bound gray-scale value according to the reference debug specification, such that the target debug specification for a bound gray-scale value is smaller than its reference debug specification. When gamma debugging is performed, gamma debugging can be performed on a plurality of binding gray scale values in a1 st gray scale interval to an N-1 st gray scale interval by adopting a target debugging specification, wherein different binding gray scale values can correspond to different target debugging specifications. And for the same binding gray-scale value, the corresponding reference debugging specification is larger than the corresponding target debugging specification. Illustratively, the reference debug specification of the 1 gray level is 5%, and in some embodiments of the invention, the target debug specification of the 1 gray level may be 4% when performing gamma debugging. The reference debug specification of the 128 gray level is 1.2%, and in some embodiments of the invention, the target debug specification of the 128 gray level may be 1% when performing gamma debugging.
Thus, the target brightness of the plurality of binding gray-scale values in the gray-scale interval is obtained in S1, and the target debugging specification of each gray-scale interval is determined in S2, so that the gamma debugging of the plurality of binding gray-scale values in the gray-scale interval can be performed according to the target debugging specification and the target brightness of the plurality of binding gray-scale values in the gray-scale interval, and the gamma debugging of the plurality of binding gray-scale values includes debugging the actual brightness corresponding to the plurality of binding gray-scale values to make the actual brightness close to the target brightness, and determining the required driving voltage of each binding gray-scale value of the display device in each gamma phase. It should be noted that the actual luminance and the target luminance of the same binding gray level value have a certain error, which is determined by the target debugging specification, and the picture display effect is not affected within the allowable range.
In summary, in the gamma debugging method provided in some embodiments of the present invention, the whole gray scale range of the gamma segment is divided into a plurality of gray scale intervals, different gamma values are used to calculate the target brightness of the bound gray scale values in the different gray scale intervals, the set gamma values used in the gray scale intervals are gradually increased according to the sequence that the gray scale values are gradually increased, when calculating the target brightness, the larger the set gamma value used is, the smaller the target brightness corresponding to the gray scale value is, otherwise, the smaller the set gamma value used is, the larger the target brightness corresponding to the gray scale value is, so that the target brightness of the bound gray scale values in the low gray scale interval is improved. In the related art, the target brightness is calculated by using the same set gamma value in the whole gray scale range, that is, the target brightness is calculated by using the same set gamma value in at least two gray scale intervals. The target brightness of the low gray scale is low, so that when gamma debugging is performed, the debugging specification required by the low gray scale is wide, the actual brightness obtained after the low gray scale is subjected to gamma debugging has a large deviation with the target brightness, and color cast occurs. The gamma adjustment method provided by some embodiments of the present invention can calculate the target brightness by, for each gray scale interval except the highest gray scale interval, that is, the target brightness can be calculated using a gamma value smaller than the reference gamma value for the 1 st gray scale interval to the N-1 st gray scale interval, the target brightness of the entire gray scale in the other gray scale intervals except the gray scale interval including the highest gray scale value can be improved, further, the debugging can be performed in the low-ash stage by adopting a target debugging specification smaller than a reference debugging specification without adopting a wider debugging specification during the gamma debugging, the target brightness of the low gray scale is improved, and the required debugging specification is tightened, so that the actual brightness obtained by gamma debugging is closer to the target brightness, the color cast phenomenon is improved, and the image quality of the low gray scale is improved. In the folding mobile phone which utilizes the linkage display of the two screens, when the two screens simultaneously display one picture, the display effect can be greatly improved due to the small color cast under the low gray scale.
In some embodiments, the gamma debugging method further comprises: s3, for the gray scale interval including the highest gray scale value, carrying out gamma debugging on the plurality of binding gray scale values in the gray scale interval according to the set debugging specification and the target brightness of the plurality of binding gray scale values in the gray scale interval.
The above embodiment is a step of performing gamma debugging on a plurality of binding gray-scale values of the nth gray-scale interval, and in some embodiments, S2 and S3 may be performed simultaneously. When gamma debugging is performed, gamma debugging needs to be performed on all binding gray scale values in the whole gray scale range. When gamma debugging is performed, parameters such as a gamma value and target brightness need to be input, and the gamma value adopted in a gray scale interval is gradually increased according to the sequence that the gray scale is gradually increased. In particular, in some examples, the gamma value employed in gamma debugging may be equal to the set gamma value employed in calculating the target brightness. In addition, for each gray scale interval, the gamma value used in the gamma debugging may be different from the set gamma value used in the target brightness calculation. When performing gamma debugging, the gamma value used in the gray scale interval including the highest gray scale value is the reference gamma value, and the gamma value used in each of the other gray scale intervals except the gray scale interval including the highest gray scale value is smaller than the reference gamma value. In addition, when the gamma debugging is carried out on the gray scale interval including the highest gray scale value, a set debugging specification is adopted, wherein the set debugging specification is equal to the debugging specification required when the gamma debugging is carried out on a plurality of binding gray scale values in the gray scale interval including the highest gray scale value by adopting a reference gamma value.
In some embodiments, the entire gray scale range includes two gray scale intervals, which are a first gray scale interval and a second gray scale interval, respectively, the first gray scale interval adopts a set gamma value as a first gamma value, the second gray scale interval adopts a set gamma value as a second gamma value, the first gamma value is smaller than the second gamma value, and the second gamma value is the reference gamma value.
The first gray scale interval is a1 st gray scale interval, the second gray scale interval is a2 nd gray scale interval, illustratively, the first gray scale interval includes 1 gray scale to 128 gray scales, and the second gray scale interval includes 129 gray scales to 256 gray scales. The gray scale value in the first gray scale interval is smaller than the gray scale value in the second gray scale interval, and for the same gray scale value, the target brightness obtained by adopting the first gamma value for calculation is larger than the target brightness obtained by adopting the second gamma value for calculation. Because the gray scale value in the first gray scale interval is lower, when the target brightness is calculated, the first gamma value adopted by the first gray scale interval is smaller than the second gamma value adopted by the second gray scale interval, and therefore the target brightness of a plurality of bound gray scale values in the first gray scale interval can be improved, when the gamma debugging is carried out, the target debugging specification adopted by the plurality of bound gray scale values in the first gray scale interval can be smaller than the reference debugging specification, and the color cast phenomenon of the display device 300 in the first gray scale interval can be improved.
As shown in fig. 7A, curve a is a gamma curve for calculating the target brightness with a gamma value of 2.0 for the entire gray scale range, curve B is a gamma curve for calculating the target brightness with a gamma value of 2.4 for the entire gray scale range, and in some embodiments of the present invention, the target brightness in the second gray scale interval may be calculated with a gamma curve with a gamma value of 2.2 for gamma adjustment, and curve C is a gamma curve in the second gray scale interval in some embodiments of the present invention. The curve a is divided into a curve a1 and a curve a1 by taking the 128 gray scale as a boundary point, the curve a1 corresponds to a first gray scale interval, and the curve a2 corresponds to a second gray scale interval.
As shown in fig. 7B, in the case that the entire gray scale range is divided into two gray scale sections, a curve X indicates that the entire gray scale range adopts two different set gamma values to obtain the target brightness corresponding to each gray scale, wherein a first portion of the curve X is a gamma curve having a set gamma value of 2.0, and a second portion of the curve X is a gamma curve having a set gamma value of 2.2.
In some embodiments, in a case where the entire gray scale range is divided into a first gray scale section and a second gray scale section, the maximum gray scale value of the first gray scale section is located in the middle region of the entire gray scale range. The middle region may include middle values of the entire gray scale range, which may include 256 gray scales, for example, with a middle gray scale value of 128 gray scales. Illustratively, the entire gray scale range includes 1024 gray scales, with a middle gray scale value of 512 gray scales. And the minimum boundary gray-scale value of the middle area and the middle gray-scale value have a specified difference. For example, when the entire gray scale range has 256 gray scales, the middle region may have 118 gray scales to 138 gray scales.
In the following, the gamma adjustment method provided by the present invention is specifically described by taking the nor9 mode as an example, in the nor9 mode, 256 gray scales are provided, the target brightness of the nor9 is set to be 4.9nit (nit), that is, the target brightness of the 256 gray scales is 4.9nit, in the nor9 mode, the whole gray scale range is divided into a first gray scale section and a second gray scale section, wherein the maximum gray scale value of the first gray scale section can be 128 gray scales, the minimum gray scale value of the second gray scale section can be 129 gray scales, the first gamma value can be gamma2.0, and the second gamma value can be gamma2.2, in the related art, the target brightness corresponding to the 128 gray scale calculated according to gamma2.2 is 1.23 nit, in some embodiments of the present invention, the target brightness of the 128 gray scale can be calculated according to gamma2.0, the target brightness of the 128 gray scale calculated according to gamma 3533 nit is calculated, compared with the related art, the target brightness obtained by the 128 gray scale in some embodiments of the invention is higher, so that when the 128 gray scale is subjected to gamma debugging, the debugging specification adopted by some embodiments of the invention is smaller than that adopted when the target brightness is 1.23 nit, and further the actual brightness obtained by gamma debugging can be closer to the target brightness, so that the color cast phenomenon is improved.
In addition, in the related art, the target brightness of all the binding gray scale values in the whole gray scale range is calculated by gamma2.2, the target brightness of the 129 gray scale, which is the minimum gray scale value in the second gray scale interval, is calculated by gamma2.2 and is 1.14 nit, and the target brightness of the 128 gray scale, which is the maximum gray scale value in the first gray scale interval, is 1.23 nit, in some embodiments of the invention, the target brightness of the 128 gray scale, which is the maximum gray scale value in the first gray scale interval, is calculated by gamma2.0 and is 1.33 nit, after gamma adjustment, the brightness of 128 gray levels in the displayed picture is changed from 1.23 nit to 1.33 nit, and the brightness is reduced from 1.33 nit to 1.14 nit when the gray scale is changed from 128 to 129, however, the brightness is higher at this time, and the human eye perception is insensitive under high brightness, so that the human eye cannot perceive the sudden reduction of the gray scale brightness, the perception abnormality of the human eye cannot be caused, and the color cast can be improved. Therefore, the maximum gray-scale value of the first gray-scale interval is set in the middle area of the whole gray-scale range, so that the phenomenon that human eyes perceive abnormity due to sudden brightness change when the gray-scale interval is transited can be avoided. In addition, if the brightness variation causes the human eye to perceive the abnormality when the gamma adjustment is performed from the 128 gray level to the 129 gray level, the gray level ranges of the first gray level section and the second gray level section can be adjusted appropriately. Specifically, the maximum gray scale value of the first gray scale section may be reduced.
When determining whether the gray-scale color shift is serious, the calculation may be performed according to the following formula, uv ═ u [ (u)i-uL255)2+(vi-vL255)2]1/2Wherein u is 4x/(-2x +12y +3) and v is 9y/(-2x +12y + 3). The smaller the Δ uv value is, the better the color uniformity and the lighter the color cast condition is, x and y are respectively an abscissa and an ordinate in a gamma curve diagram, wherein x is the abscissa, i.e., a gray level value, and y is the luminance. As shown in fig. 8 and 9, a curve D is a GCS (Gray color shift) curve in the related art, and a curve E is a GCS curve in some embodiments of the present invention, in which an abscissa is a Gray scale value and an ordinate is a Δ uv value, and fig. 9 is an enlarged view of fig. 8. In which, the farther Δ uv is from the abscissa, the more serious the color shift phenomenon is, as can be seen from fig. 8 and 9, the curve E is closer to the x-axis than the curve D, and thus some embodiments of the present invention can significantly improve the color shift phenomenon of low gray scale.
In addition, one binding gray scale value in the first gray scale interval can be the maximum gray scale value of the first gray scale interval, one binding gray scale value in the second gray scale interval can be the minimum gray scale value of the second gray scale interval, wherein the target brightness of the maximum gray scale value in the first gray scale interval can be larger than the target brightness in the minimum gray scale in the second gray scale interval, and if the difference value of the brightness values between the first gray scale interval and the second gray scale interval is larger than the specified brightness difference value, the ranges of the first gray scale interval and the second gray scale interval can be readjusted, so that the phenomenon that human eyes perceive abnormity due to sudden brightness change in the transition of the gray scale intervals is avoided. In addition, if after gamma debugging, it is found that the brightness jump is obvious when the first gray scale interval transits to the second gray scale interval, the ranges of the first gray scale interval and the second gray scale interval can be readjusted until the first gray scale interval transits to the second gray scale interval without being perceived by human eyes.
In some embodiments, the entire gray scale range may be divided into not only two gray scale intervals but also three gray scale intervals, and specifically, the entire gray scale range includes three gray scale intervals, namely a third gray scale interval (1 st gray scale interval), a fourth gray scale interval (2 nd gray scale interval) and a fifth gray scale interval (3 rd gray scale interval), where the set gamma value adopted by the third gray scale interval is a third gamma value, the set gamma value adopted by the fourth gray scale interval is a fourth gamma value, and the set gamma value adopted by the fifth gray scale interval is a fifth gamma value, where the third gamma value is smaller than the fourth gamma value, the fourth gamma value is smaller than the fifth gamma value, and the fifth gamma value is the reference gamma value.
Before gamma debugging, the whole gray scale range can be pre-segmented, namely, the whole gray scale range is divided into two gray scale intervals which are a first gray scale interval and a second gray scale interval respectively, after target brightness of a bound gray scale value in each gray scale interval is calculated through S2, if the difference value of the target brightness of the maximum gray scale value in the first gray scale interval and the target brightness of the minimum gray scale value in the second gray scale interval is larger, the whole gray scale range can be divided again, at the moment, the whole gray scale range is divided into three gray scale intervals so as to reduce the difference value between the maximum gray scale value in the smaller gray scale interval of the two adjacent gray scale intervals and the target brightness of the minimum gray scale value in the larger gray scale interval, and further, brightness mutation during gray scale interval transition is prevented from being perceived by human eyes. Of course, after gamma adjustment is performed on the entire gray scale range in S3, if the brightness decrease at the transition of the adjacent gray scale intervals is detected by human eyes, the gray scale intervals may be divided again to ensure that the brightness decrease at the transition of the gray scale intervals is not detected.
In some embodiments, as shown in fig. 2, before the gamma debugging, at S1, the for each gray scale interval except the gray scale interval including the highest gray scale value, the gamma debugging of the plurality of bound gray scale values in the gray scale interval according to the target debugging specification and the target brightness of the plurality of bound gray scale values in the gray scale interval, further includes:
and S01, setting an initial debugging specification.
And S02, acquiring the target debugging specification according to the initial debugging specification.
For convenience of description, in the following description, the gray scale section including the highest gray scale value may be defined as the highest gray scale section, and each of the other gray scale sections except the gray scale section including the highest gray scale value may be collectively referred to as a low gray scale section. Specifically, in some examples, the initial debugging specification may be adopted to perform gamma debugging on the low gray scale interval first, and if the gamma debugging is passed, the debugging specification may be gradually tightened, and the gamma debugging on the low gray scale interval is continued until the gamma debugging fails. In other examples, the initial debugging specification may be adopted to perform gamma debugging on the low gray scale interval first, and if the gamma debugging fails, the debugging specification may be gradually relaxed, and the gamma debugging on the low gray scale interval may be continued until the gamma debugging passes.
In some embodiments, as shown in fig. 3 and 5, the step S02 of obtaining the target debug specification according to the initial debug specification specifically includes the following steps:
s021, carrying out gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of a plurality of bound gray scale values in the gray scale interval.
S022, based on the successful gamma debugging, gradually reducing the debugging specification to carry out gamma debugging on the bound gray-scale value in the gray-scale interval on the basis of the initial debugging specification until the gamma debugging fails, and determining the debugging specification adopted by the previous gamma debugging as the target debugging specification.
In some embodiments of the present invention, the gamma debugging is performed on the multiple bound gray-scale values in the low gray-scale interval according to the initial debugging specification and the target brightness of the multiple bound gray-scale values in the low gray-scale interval, so that the gamma debugging is successful once, which indicates that the initial debugging specification is larger at this time. The larger the target brightness is, the smaller the debugging specification corresponding to the gray scale value is, and when the target brightness is calculated, the set gamma value adopted by the low gray scale interval is smaller than the reference gamma value, so that the target debugging specification of the bound gray scale value in the low gray scale interval is smaller than the debugging specification corresponding to the bound gray scale value in the low gray scale interval when the reference gamma value is adopted, and when the gamma debugging is performed on the multiple bound gray scale values in the low gray scale interval by adopting the reference gamma value, the debugging specification corresponding to the bound gray scale value in the low gray scale interval has an empirical value, that is, the reference debugging specification has an empirical value, and calculation is not required, for example, in the related technology, the debugging specification of 1 gray scale is 5%. Since the target debugging specification is smaller than the reference debugging specification, when gamma debugging is performed on the plurality of bound gray scale values in the low gray scale interval by using the empirical value of the reference debugging specification, the successful gamma debugging can be ensured, and therefore, the preliminary debugging specification can be set to a debugging specification required for performing gamma debugging on the plurality of bound gray scale values in the low gray scale interval by using the reference gamma value, that is, the preliminary debugging specification can be the reference debugging specification. In addition to this, the reference debug specification may be obtained by calculation. On the basis of successful gamma debugging, gradually reducing the debugging specification, carrying out gamma debugging on the bound gray level values in the low gray level interval until the gamma debugging fails, determining the debugging specification adopted by the previous gamma debugging as the target debugging specification, exemplarily, when carrying out gamma debugging on a plurality of bound gray level values in the low gray level interval for M times, the gamma debugging fails, and taking the debugging specification adopted by carrying out gamma debugging in the low gray level interval for the M-1 th time as the target debugging specification, wherein M is a positive integer greater than or equal to 2.
In some embodiments, the target debug specification may also be obtained by, specifically, as shown in fig. 4 and 6, the obtaining of the target debug specification from the initial debug specification by S02 specifically includes the following processes:
s023, performing gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of the plurality of bound gray scale values in the gray scale interval.
S024, based on gamma debugging failure, gradually increasing debugging specifications to carry out gamma debugging on the bound gray value in the gray scale interval on the basis of the initial debugging specifications until the gamma debugging is passed, and determining the debugging specifications adopted by the current gamma debugging as the target debugging specifications.
In some embodiments of the present invention, when performing gamma debugging on a plurality of bound gray-scale values in a low gray-scale interval according to an initial debugging specification and target brightness of the plurality of bound gray-scale values in the low gray-scale interval, the gamma debugging fails once, which indicates that the initial debugging specification is too small, and the debugging specification needs to be relaxed to pass the debugging. Specifically, a smaller debugging specification can be set for a plurality of bound gray-scale values in the low gray-scale interval, so that the gamma debugging in the low gray-scale interval fails, and then the debugging specification can be gradually relaxed on the basis of the initial debugging specification until the gamma debugging is passed. For example, when the gamma debugging is performed on the low gray scale interval M times, if the gamma debugging is passed, the debugging specification adopted when the gamma debugging is performed on the low gray scale interval M times may be determined as the target debugging specification, where M is a positive integer greater than or equal to 2.
In some embodiments, the set gamma value ranges from 2.0 to 2.4.
Wherein, the value ranges of the first gamma value, the second gamma value, the third gamma value, the fourth gamma value and the fifth gamma value are all 2.0 to 2.4. The reference gamma value may be 2.2, and the set gamma value used in each of the gray scale sections other than the gray scale section including the highest gray scale value is less than 2.2. When the entire gray scale interval includes a first gray scale interval and a second gray scale interval, the set gamma value used in the first gray scale interval may be 2.0, and the set gamma value used in the second gray scale interval may be 2.2 when calculating the target brightness. When the entire gray scale range includes the third gray scale interval, the fourth gray scale interval, and the fifth gray scale interval, the third gamma value may be 2.0, the fourth gray scale value may be 2.1, and the fifth gray scale value may be 2.2. In addition, the first gray scale interval … … can adopt other gamma values in the fifth gray scale interval, which is not listed here.
In some embodiments, as shown in fig. 1 to 4, after the gamma debugging, at S3, the gamma debugging, according to the set debugging specification and the target brightness of the gray scale interval, of the gray scale interval including the highest gray scale value, of a plurality of bound gray scale values in the gray scale interval, further includes:
s4, recording the driving voltage corresponding to each gray scale value in the whole gray scale range during gamma debugging into the driving chip 302 of the display device 300.
When the gamma debugging is passed, the driving voltage corresponding to each gray scale value can be determined, and then the driving voltage corresponding to each gray scale value is burned into the driving chip 302 of the display device 300, and when the driving chip 302 drives the display panel 301 to display a certain gray scale, the driving voltage corresponding to the gray scale can be called, so that the display device 300 displays the brightness corresponding to the gray scale during the gamma debugging. The driving chip 302 may drive the display panel 301 to emit light according to the programmed driving voltage, and at this time, the corresponding relationship between each gray scale value and the display brightness in the entire gray scale range may satisfy the gamma curve when performing gamma debugging in S2 and S3.
In some examples, for the bound gray-scale value, the driving voltage required when the gamma debugging of the bound gray-scale value passes, that is, the driving voltage required when the actual brightness corresponding to the bound gray-scale value reaches or approximately reaches the target brightness, may be directly obtained in the gamma debugging process. For each gray level value except the bound gray level value, the gray level value except the bound gray level value in the whole gray level range is defined as another gray level value for convenience of description, the actual brightness corresponding to the other gray level value can be calculated in the gamma debugging process, and the driving voltage required by the other gray level value is calculated according to the actual brightness corresponding to the other gray level value.
Some embodiments of the present invention further provide a gamma debugging apparatus 100, as shown in fig. 10, where the gamma debugging apparatus 100 can be applied to any one of the above gamma debugging methods, and the gamma debugging apparatus 100 includes: the target brightness acquiring module 101 and the gamma debugging module 102 are configured to, for each gray scale interval, acquire target brightness of a plurality of bound gray scale values of each gray scale interval by using a gamma value by the target brightness acquiring module 101; according to the sequence that the gray-scale values are gradually increased, the set gamma values adopted by the at least two gray-scale intervals are gradually increased, and the maximum set gamma value is the reference gamma value.
The gamma debugging module 102 is connected to the target obtaining module 101, and for each gray scale interval except the gray scale interval including the highest gray scale value, the gamma debugging module 102 is configured to perform gamma debugging on a plurality of binding gray scale values in the gray scale interval according to a target debugging specification and target brightness of the gray scale interval; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
The gamma debugging device 100 is used for performing gamma debugging on the display panel 301 to be debugged, and through the gamma debugging device 100, the color cast phenomenon of low gray scale of the display panel 301 to be debugged is improved, and the display effect is improved.
In some embodiments, the gamma debugging module 102 is further configured to, for a gray scale interval including a highest gray scale value, gamma debug a plurality of bound gray scale values in the gray scale interval according to a target brightness setting a debugging specification and the plurality of bound gray scale values in the gray scale interval
In some embodiments, the entire gray scale range includes two gray scale intervals, which are a first gray scale interval and a second gray scale interval, the target brightness obtaining module 101 is further configured to obtain the target brightness of the plurality of bound gray scale values in the first gray scale interval and the plurality of bound gray scale values in the second gray scale interval according to a gamma curve having a set gamma value, and the corresponding gamma debugging module 102 is further configured to perform gamma debugging on the plurality of bound gray scale values in the first gray scale interval and the plurality of bound gray scale values in the second gray scale interval. In other embodiments, the entire gray scale range includes three gray scale intervals, namely a third gray scale interval, a fourth gray scale interval and a fifth gray scale interval, the target brightness obtaining module is configured to obtain the target brightness of the plurality of bound gray scale values in the third gray scale interval, the fourth gray scale interval and the fifth gray scale interval according to a gamma curve having a set gamma value, and the corresponding gamma debugging device 100 is configured to perform gamma debugging on the plurality of bound gray scale values in the third gray scale interval, the fourth gray scale interval and the fifth gray scale interval.
In some embodiments, the gamma debugging module 102 is further configured to perform gamma debugging on the gray scale interval according to the initial debugging specification and a target brightness of a plurality of bound gray scale values in the gray scale interval.
Based on the successful gamma debugging, the debugging specification is gradually reduced on the basis of the initial debugging specification, and the gamma debugging module 102 is used for carrying out gamma debugging on the bound gray-scale value in the gray-scale interval until the gamma debugging fails.
In some embodiments, the gamma debugging module 102 is further configured to perform gamma debugging on the gray scale interval according to the initial debugging specification and a target brightness of a plurality of bound gray scale values in the gray scale interval.
Based on the failure of gamma debugging, the debugging specification is gradually increased on the basis of the initial debugging specification, and the gamma debugging module 102 is used for carrying out gamma debugging on the bound gray-scale value in the gray-scale interval until the gamma debugging is successful.
In some embodiments, the gamma debugging device 100 further includes a voltage burning module 103, the voltage burning module 103 can be connected to the gamma debugging device 100 and a driving chip of the display device, and the voltage burning module 103 is configured to burn driving voltages corresponding to each gray-scale value in the entire gray-scale range into the driving chip of the display device during the gamma debugging.
The gamma debugging apparatus 100 provided in some embodiments of the present invention has all the advantages provided by any of the above gamma debugging methods, which are not repeated herein.
Some embodiments of the present invention provide a computer device 200, as shown in fig. 11, the computer device 200 comprising: a processor 201 and a memory 202, the memory 202 storing computer program instructions, which when executed by the processor 201, cause the processor 201 to execute the gamma debugging method provided by any of the above embodiments.
In some embodiments of the present invention, the computer device 200 can improve the color cast of the display panel 301 in low gray scale, and improve the display effect of the display panel 301.
Among other things, memory 202 referred to in some embodiments of the present invention may include both read-only memory and random access memory. The processor 201 mentioned in some embodiments of the present invention may be a Central Processing Unit (CPU), or may be other general-purpose processor 201, a digital signal processor 201(DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor 201 may be a microprocessor 201 or the processor 201 may be any conventional processor 201 or the like.
Further, the processor 201 and memory 202 in some embodiments of the invention may interact through a communication bus 203.
Some embodiments of the present invention provide a display device 300, as shown in fig. 12 and 13, the display device 300 including: the display device comprises a display panel 301 and a driving chip 302, wherein a driving voltage corresponding to each gray scale value in the whole gray scale range during gamma debugging is recorded in the driving chip 302, and the driving chip 302 drives the display panel 301 to emit light according to the driving voltage, so that the corresponding relationship between each gray scale value in the whole gray scale range and the display brightness meets a gamma curve during gamma debugging in the gamma debugging method provided by any one of the embodiments above when the display panel 301 is in a designated gamma section.
The display device 300 may be a mobile phone, a notebook computer, a display, or the like. After the gamma debugging is successful, the driving voltage corresponding to each gray scale value is programmed into the driving chip 302, when the driving chip 302 drives the display panel 301 to emit light, the display panel 301 can be driven to emit light according to the driving voltage, and at this time, the corresponding relationship between the gray scale value and the display brightness of the display panel 301 can meet the gamma curve during the gamma debugging, so that the display device 300 provided by some embodiments of the invention can avoid the color cast phenomenon generated by the low gray scale, and has a good display effect.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (13)

1. A gamma debugging method is characterized in that,
for at least part of the gamma sections, the whole gray scale range comprises at least two continuous gray scale intervals, and in the two adjacent gray scale intervals, the maximum gray scale value of the relatively lower gray scale interval is smaller than the minimum gray scale value of the relatively higher gray scale interval;
the gamma debugging method comprises the following steps: for each gray scale interval, acquiring target brightness of a plurality of binding gray scale values in the gray scale interval according to a gamma curve with a set gamma value; according to the sequence that the gray scale values are gradually increased, the set gamma values adopted by the at least two gray scale intervals are gradually increased, and the maximum set gamma value is a reference gamma value;
performing gamma debugging on a plurality of binding gray-scale values in the gray-scale intervals according to a target debugging specification and target brightness of the plurality of binding gray-scale values in the gray-scale intervals for each gray-scale interval except the gray-scale interval comprising the highest gray-scale value; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
2. The gamma debugging method of claim 1,
the whole gray scale range comprises two gray scale intervals which are a first gray scale interval and a second gray scale interval respectively, the set gamma value adopted by the first gray scale interval is a first gamma value, the set gamma value adopted by the second gray scale interval is a second gamma value, the first gamma value is smaller than the second gamma value, and the second gamma value is the reference gamma value.
3. The gamma debugging method of claim 2,
the maximum gray scale value of the first gray scale interval is positioned in the middle area of the whole gray scale range.
4. The gamma debugging method of claim 1,
the whole gray scale range comprises three gray scale intervals, namely a third gray scale interval, a fourth gray scale interval and a fifth gray scale interval, the set gamma value adopted by the third gray scale interval is a third gamma value, the set gamma value adopted by the fourth gray scale interval is a fourth gamma value, the set gamma value adopted by the fifth gray scale interval is a fifth gamma value, wherein the third gamma value is smaller than the fourth gamma value, the fourth gamma value is smaller than the fifth gamma value, and the fifth gamma value is the reference gamma value.
5. The gamma debugging method of claim 1,
before performing gamma debugging on a plurality of binding gray-scale values in the gray-scale intervals according to a target debugging specification and target brightness of the plurality of binding gray-scale values in the gray-scale intervals for each gray-scale interval except the gray-scale interval including the highest gray-scale value, the method further includes:
setting an initial debugging specification;
and acquiring the target debugging specification according to the initial debugging specification.
6. The gamma debugging method of claim 5,
the obtaining the target debugging specification according to the initial debugging specification specifically includes:
performing gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of a plurality of bound gray scale values in the gray scale interval;
and on the basis of successful gamma debugging, gradually reducing the debugging specification to carry out gamma debugging on the bound gray level value in the gray level interval on the basis of the initial debugging specification until the gamma debugging fails, and determining the debugging specification adopted by the previous gamma debugging as the target debugging specification.
7. The gamma debugging method of claim 1,
the obtaining the target debugging specification according to the initial debugging specification specifically includes:
performing gamma debugging on the gray scale interval according to the initial debugging specification and the target brightness of a plurality of bound gray scale values in the gray scale interval;
and on the basis of gamma debugging failure, gradually increasing the debugging specification to carry out gamma debugging on the bound gray level value in the gray level interval on the basis of the initial debugging specification until the gamma debugging is passed, and determining the debugging specification adopted by the current gamma debugging as the target debugging specification.
8. The gamma debugging method of claim 1, further comprising:
and for the gray scale interval comprising the highest gray scale value, carrying out gamma debugging on the plurality of binding gray scale values in the gray scale interval according to a set debugging specification and the target brightness of the plurality of binding gray scale values in the gray scale interval.
9. The gamma debugging method according to any one of claims 1 to 8,
the value range of the set gamma value is 2.0 to 2.4.
10. The gamma debugging method of claim 8,
after performing gamma debugging on a plurality of binding gray scale values in the gray scale interval according to a preset debugging specification and the target brightness of the gray scale interval for the gray scale interval including the highest gray scale value, the method further includes:
and burning the driving voltage corresponding to each gray scale value in the whole gray scale range in the gamma debugging process into a driving chip of the display device.
11. A gamma debugging apparatus for use in the gamma debugging method according to any one of claims 1 to 10, comprising:
the target brightness acquisition module is used for acquiring the target brightness of a plurality of binding gray scale values of each gray scale interval according to a gamma curve with a set gamma value for each gray scale interval; according to the sequence that the gray scale values are gradually increased, the set gamma values adopted by the at least two gray scale intervals are gradually increased, and the maximum set gamma value is a reference gamma value;
the gamma debugging module is connected with the target acquisition module and is used for carrying out gamma debugging on a plurality of bound gray-scale values in the gray-scale intervals according to a target debugging specification and the target brightness of the gray-scale intervals for each other gray-scale interval except the gray-scale interval comprising the highest gray-scale value; wherein the target debug specification is less than a reference debug specification; the reference debugging specification is a debugging specification required when the reference gamma value is adopted to carry out gamma debugging on a plurality of binding gray-scale values in the gray-scale interval.
12. A computer device, comprising:
a processor and a memory, the memory storing computer program instructions which, when executed by the processor, cause the processor to perform the gamma debugging method of any of claims 1 to 10.
13. A display device, comprising:
the display device comprises a display panel and a driving chip, wherein a driving voltage corresponding to each gray scale value in the whole gray scale range during gamma debugging is burnt in the driving chip, and the driving chip drives the display panel to emit light according to the driving voltage, so that the corresponding relation between each gray scale value in the whole gray scale range and display brightness meets a gamma curve during gamma debugging in the gamma debugging method of claims 1 to 10 under the appointed gamma section of the display panel.
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