CN112992065B - Brightness adjusting method and device for display panel and computer readable storage medium - Google Patents
Brightness adjusting method and device for display panel and computer readable storage medium Download PDFInfo
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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]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The invention discloses a brightness adjusting method and device of a display panel and a computer readable storage medium. The brightness adjusting method comprises the following steps: determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness; determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by a preset method; and assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness. The embodiment of the invention can reduce the Mura phenomenon when the display panel displays and improve the display effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a brightness adjusting method and device of a display panel and a computer readable storage medium.
Background
With the development of display technology, the application of display panels is becoming more and more extensive, and the requirements for display panels are becoming higher and higher accordingly.
However, the conventional display panel has a serious Mura (display non-uniformity) problem when displaying a low gray scale, particularly at low luminance, and the display effect of the display panel is seriously affected.
Disclosure of Invention
The invention provides a brightness adjusting method, a brightness adjusting device and a computer readable storage medium of a display panel, which are used for reducing the Mura phenomenon of the display panel and improving the display effect.
In a first aspect, an embodiment of the present invention provides a brightness adjustment method for a display panel, where the brightness adjustment method includes: determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness; determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by a preset method; and assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
Optionally, assigning the grayscale voltage corresponding to each grayscale less than or equal to the maximum grayscale value as the grayscale voltage corresponding to zero brightness includes:
and assigning the gray scale voltage corresponding to the maximum gray scale value and the gray scale binding points smaller than the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
Optionally, the determining a maximum gray-scale value of the display brightness of the display panel when the preset method is tested to be black includes:
and sequentially increasing or decreasing the gray scale voltage input to the display panel for displaying from the gray scale voltage corresponding to the preset brightness so as to sequentially decrease the gray scale displayed by the display panel until the display result of the display panel is black when tested by a preset method.
Optionally, the preset method is visual.
Optionally, the preset brightness is less than or equal to 5 nits.
In a second aspect, an embodiment of the present invention further provides a brightness adjusting device for a display panel, where the brightness adjusting device includes: the first determining module is used for determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness; the second determining module is used for determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by a preset method; and the assignment module is used for assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value to the gray scale voltage corresponding to zero brightness.
Optionally, the assignment module is configured to assign only gray scale voltages corresponding to the maximum gray scale value and gray scale bindings smaller than the maximum gray scale value to gray scale voltages corresponding to zero brightness.
Optionally, the second determining module sequentially increases or decreases the gray scale voltage input to the display panel for displaying from the gray scale voltage corresponding to the preset brightness, so that the gray scales displayed by the display panel are sequentially decreased until the display result of the display panel is black when tested by the preset method.
Optionally, the preset method is visual.
In a third aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the brightness adjusting method according to the first aspect.
According to the technical scheme of the embodiment of the invention, the adopted brightness adjusting method comprises the following steps: determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness; determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is black when tested by a preset method; and assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness. In this embodiment, the maximum gray scale value of the display panel is found under the preset brightness, so that when the display panel displays the gray scales of the maximum gray scale value and below, the display result is black, and the gray scale voltages corresponding to the maximum gray scale value and below are assigned to be the gray scale voltages corresponding to zero brightness.
Drawings
Fig. 1 is a flowchart of a brightness adjustment method for a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a brightness adjustment apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the Mura phenomenon of the conventional display panel is relatively serious, and the applicant has found through careful research that the technical problem is caused because the conventional display panel generally uses an OLED (Organic Light Emitting Diode) for displaying, the OLED needs to be driven by a pixel driving circuit, the pixel driving circuit includes a plurality of transistors, and due to process reasons, the characteristics of the transistors and the OLEDs of different pixels are not uniform, so that the luminance of the OLEDs of different pixels may also be not uniform under the same gray scale and data voltage, that is, the Mura phenomenon is more obvious under the low luminance and low gray scale; the display panel is usually provided with a plurality of sections of gamma curves, different brightness sections of the display panel are adjusted by utilizing the gamma curves, and due to the problem of the precision of optical data acquired by debugging equipment, the error of data debugged under low brightness and low gray scale is large, namely the error of the gamma curve section obtained under low brightness and low gray scale is large, so that the color cast phenomenon of a picture under low brightness and low gray scale is caused, the preset value range can not be reached, and the display effect of the display panel is further poor.
Based on the technical problem, the invention provides the following solution:
fig. 1 is a flowchart of a brightness adjustment method of a display panel according to an embodiment of the present invention, and referring to fig. 1, the brightness adjustment method includes:
step S101, determining a corresponding relation between brightness and gray scale within a range from zero brightness to preset brightness;
specifically, the preset brightness may be freely set by a user, may be set to be a lower brightness, and after the preset brightness is set, the zero brightness to the preset brightness may be divided into a plurality of gray scales, for example, 256 gray scales from 0 gray scale to 255 gray scale; then, the corresponding relationship between each gray scale and the brightness is determined, and the specific relationship can be determined by an optical method, for example, the display panel can be photographed when the display panel displays a certain gray scale, so as to determine the display brightness corresponding to the currently displayed gray scale.
Step S102, determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is black in the test of a preset method;
specifically, the maximum gray scale value is greater than zero, and the test result is zero when the gray scale displayed by the display panel is less than or equal to the maximum gray scale value, that is, when the display panel displays the gray scale below the maximum gray scale value and the maximum gray scale value, although the corresponding gray scale voltage is different from the gray scale voltage corresponding to black (i.e., actually, although not necessarily, black), the display result (e.g., which can be understood as a display frame) displayed by the display panel is tested (the specific test method will be described later) to be black; when the gray scale displayed by the display panel is larger than the maximum gray scale value, the display result of the display panel is not black when tested by a preset method, and the critical gray scale is also the maximum gray scale value. In this embodiment, it is exemplarily determined that the maximum gray scale value is 10 gray scales, that is, the display result is black when the display panel displays 0 gray scale to 10 gray scales under the preset brightness, and the display result is not black when the display panel displays more than 10 gray scales.
Step S103, assigning the gray scale voltage corresponding to the gray scale value less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
Specifically, in the existing gamma curve, each gray scale corresponds to a gray scale voltage, and the gray scale voltages corresponding to different gray scales are different, for example, the gray scale display data corresponding to the 0 gray scale display result has zero brightness, the gray scale display data corresponding to the 1 gray scale display result has first brightness, and the first brightness is not zero; in this embodiment, the gray scale voltages corresponding to the gray scales of the maximum gray scale value and below are assigned to the gray scale voltage corresponding to the zero brightness, for example, if the gray scale voltage corresponding to the zero brightness is 5.6V and the maximum gray scale value is 10 gray scales, the gray scale voltages corresponding to the 0 gray scale to the 10 gray scale are all assigned to 5.6V, so as to obtain the gamma curve corresponding to the 0 gray scale to the 10 gray scale at the preset brightness; it should be noted that the gray scale voltage corresponding to the gray scale larger than the maximum gray scale value can be determined by the debugging method of the gamma curve in the prior art, for example, the brightness value corresponding to each gray scale binding point is debugged first, and then the brightness values corresponding to other gray scales are determined by methods such as interpolation, so as to finally obtain a complete gamma curve; in addition, the gray scale voltage corresponding to zero brightness is not limited to 5.6V, and may be set according to the specific situation of the display panel or the driving chip. When the display panel displays, if the maximum display brightness is smaller than or equal to the preset brightness, the gamma curve obtained by the embodiment is called for displaying, that is, when the displayed gray scale is smaller than or equal to the maximum gray scale value, the gray scale voltages are the gray scale voltages corresponding to zero brightness, and because the brightness of all pixels of the display panel is zero at the moment, the Mura phenomenon does not exist, so that the display effect of the display panel is greatly improved.
In the technical solution of this embodiment, the adopted brightness adjustment method includes: determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness; determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is black when tested by a preset method; and assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness. In this embodiment, the maximum gray scale value of the display panel is found under the preset brightness, so that when the display panel displays the gray scales of the maximum gray scale value and below, the display result is black, and the gray scale voltages corresponding to the maximum gray scale value and below are assigned to be the gray scale voltages corresponding to zero brightness.
Optionally, the predetermined method is visual.
Specifically, when the maximum gray scale value of the display panel under the preset brightness is determined, the tester can visually judge the maximum gray scale value, and if the tester judges that the corresponding display result under the gray scale is black, the gray scale can be determined to be less than or equal to the maximum gray scale value; and if the tester judges that the corresponding display effect under the gray scale is not gray, the gray scale can be determined to be larger than the maximum gray scale value, and accordingly the tester can judge the maximum gray scale value corresponding to the display panel. It should be noted that, visual results of different testers on the same display panel may be different, in this embodiment, multiple testers may respectively visually inspect the display effect of the display panel to respectively determine multiple different preset gray scales, and then average multiple different maximum gray scale values to obtain a final maximum gray scale value. Wherein, the ages of a plurality of testers can be uniformly and respectively, and the sex proportions can be the same. In the embodiment, if the visual result of the tester is black, the test result of the display panel is determined to be black, so that on one hand, the cost is saved, and professional test equipment is not needed; on the other hand, the finally obtained preset gray scale better accords with the watching experience of a user, so that the Mura phenomenon of the display panel is reduced under the condition that the using effect of the display panel is not reduced.
Optionally, the preset brightness is less than or equal to 5 nits.
Specifically, if the preset brightness is high, the brightness of the display panel is also high at a low gray level, when the brightness of the display panel is high, the Mura phenomenon is weak, the brightness difference between adjacent gray levels is large, human eyes are sensitive, and if gray level voltages corresponding to gray levels lower than the maximum gray level value are assigned to be gray level voltages corresponding to zero brightness, the display effect is poor; when the preset brightness is lower, the brightness of the display panel is lower at a low gray scale correspondingly, the Mura phenomenon is more obvious, the brightness difference corresponding to the adjacent gray scales is smaller, and human eyes are insensitive to the Mura phenomenon; therefore, the preset brightness can be set to be less than or equal to 5 nits, preferably 5 nits, so that the Mura phenomenon of the display panel under low brightness and low gray scale can be improved, and the display panel can have a better display effect under high brightness or high gray scale.
Optionally, assigning the grayscale voltage corresponding to each grayscale of which the grayscale value is less than or equal to the maximum grayscale value to the grayscale voltage corresponding to zero luminance includes:
and assigning the gray scale voltage corresponding to the maximum gray scale value and the gray scale binding points smaller than the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
Specifically, when the gamma curve is debugged, only the gray level tie points can be debugged to simplify the debugging process and save the debugging time, a plurality of gray level tie points can be arranged in the gray levels from 0 gray level to 255 gray level, and the specific gray level values of the gray level tie points can be set by manufacturers of the driving chips without specific limitation; in this embodiment, only the maximum gray level value and the gray level tie points smaller than the maximum gray level value may be assigned as the gray level voltage corresponding to zero brightness, and the remaining gray levels smaller than the maximum gray level value may be automatically calculated by the driving chip, for example, by interpolation, since the gray level tie points and the gray level voltages corresponding to the maximum gray level value are both the gray level voltages corresponding to zero brightness, and the gray level voltages corresponding to the gray levels smaller than the maximum gray level value obtained by interpolation are also the gray level voltages corresponding to zero brightness; therefore, only the maximum gray-scale value and the gray-scale voltage corresponding to the gray-scale binding point smaller than the maximum gray-scale value are assigned to be the gray-scale voltage corresponding to zero brightness, so that the accuracy of the finally obtained gamma curve can be ensured, the data volume can be reduced, and the debugging time can be saved.
Optionally, determining the maximum gray-scale value of the display brightness of the display panel when the preset method is tested to be black includes: and sequentially increasing or decreasing the gray scale voltage input into the display panel for displaying from the gray scale voltage corresponding to the preset brightness so as to sequentially decrease the gray scale displayed by the display panel until the display result of the display panel is black after being tested by a preset method.
Specifically, the gray scale voltage corresponding to the preset brightness of the display panel may be determined first, and then the gray scale voltage input to the display panel may be sequentially increased or decreased, where the increase or decrease may be determined by the gray scale voltage corresponding to zero brightness, and if the gray scale voltage corresponding to zero brightness is greater than the gray scale voltage corresponding to the preset brightness, the increase is performed; if the gray scale voltage corresponding to the zero brightness is smaller than the gray scale voltage of the preset brightness factor, the gray scale voltage is reduced; since the gray scale voltages input to the display panel are sequentially changed, an accurate maximum gray scale value can be obtained with the highest efficiency, thereby improving the debugging efficiency.
An embodiment of the present invention further provides a brightness adjusting device for a display panel, as shown in fig. 2, fig. 2 is a schematic structural diagram of the brightness adjusting device for a display panel according to the embodiment of the present invention, where the brightness adjusting device includes:
a first determining module 201, configured to determine a correspondence between a brightness and a gray scale within a range from zero brightness to a preset brightness; a second determining module 202, where the second determining module 202 is configured to determine a maximum gray-scale value of the display luminance of the display panel when the display luminance is black in the preset method test; and the assignment module 203 is used for assigning the gray scale voltage corresponding to each gray scale smaller than or equal to the maximum gray scale value to the gray scale voltage corresponding to zero brightness.
Specifically, the first determining module 201 may include an optical device, the preset brightness may be freely set by a user, and may be set to be a lower brightness, and after the preset brightness is set, the brightness from zero to the preset brightness may be divided into a plurality of gray scales, for example, 256 gray scales from 0 gray scale to 255 gray scale; and then determining the corresponding relation between each gray scale and the brightness, wherein the specific relation can be determined by the optical equipment through an optical method, for example, the display panel can be photographed when the display panel displays a certain gray scale so as to determine the display brightness corresponding to the currently displayed gray scale. The maximum gray scale value is greater than zero, and the test result is zero when the gray scale displayed by the display panel is less than or equal to the maximum gray scale value, that is, when the display panel displays the gray scale below the maximum gray scale value and the maximum gray scale value, although the corresponding gray scale voltage is different from the gray scale voltage corresponding to black (i.e., although it is not necessarily black in practice), the display result (for example, it can be understood as a display screen) displayed by the display panel is tested (the specific test method will be described later) to be black; when the gray scale displayed by the display panel is greater than the maximum gray scale value, the display result of the display panel is not black when tested by the preset method, and the critical gray scale is the maximum gray scale value determined by the second determining module 202. In this embodiment, it is exemplarily determined that the maximum gray scale value is 10 gray scales, that is, the display result is black when the display panel displays 0 gray scale to 10 gray scales under the preset brightness, and the display result is not black when the display panel displays more than 10 gray scales. In the existing gamma curve, each gray scale corresponds to a gray scale voltage, and the gray scale voltages corresponding to different gray scales are different, for example, the gray scale display data corresponding to the 0 gray scale display result has zero brightness, the gray scale display data corresponding to the 1 gray scale display result has first brightness, and the first brightness is not zero; in this embodiment, the assignment module 203 assigns the gray scale voltages corresponding to the gray scales of the maximum gray scale value and below to the gray scale voltage corresponding to the zero brightness, for example, if the gray scale voltage corresponding to the zero brightness is 5.6V and the maximum gray scale value is 10 gray scales, the assignment module 203 assigns the gray scale voltages corresponding to the 0 gray scale to the 10 gray scale to 5.6V, so as to obtain the gamma curve corresponding to the 0 gray scale to the 10 gray scale at the preset brightness; it should be noted that the gray scale voltage corresponding to the gray scale larger than the maximum gray scale value can be determined by the debugging method of the gamma curve in the prior art, for example, the brightness value corresponding to each gray scale binding point is debugged first, and then the brightness values corresponding to other gray scales are determined by methods such as interpolation, so as to finally obtain a complete gamma curve; in addition, the gray scale voltage corresponding to zero brightness is not limited to 5.6V, and may be set according to the specific situation of the display panel or the driving chip. When the display panel displays, if the maximum display brightness is smaller than or equal to the preset brightness, the gamma curve obtained by the embodiment is called for displaying, that is, when the displayed gray scale is smaller than or equal to the maximum gray scale value, the gray scale voltages are the gray scale voltages corresponding to zero brightness, and because the brightness of all pixels of the display panel is zero at the moment, the Mura phenomenon does not exist, so that the display effect of the display panel is greatly improved.
According to the technical scheme of the embodiment, the adopted brightness adjusting device comprises a first determining module, wherein the first determining module is used for determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to preset brightness; the second determining module is used for determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is black in the test of the preset method; and the assignment module is used for assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value to the gray scale voltage corresponding to zero brightness. In this embodiment, the maximum gray scale value of the display panel is found under the preset brightness, so that when the display panel displays the gray scales of the maximum gray scale value and below, the display result is black, and the gray scale voltages corresponding to the maximum gray scale value and below are assigned to be the gray scale voltages corresponding to zero brightness.
Optionally, the assigning module 203 is configured to assign only the gray scale voltage corresponding to the maximum gray scale value and the gray scale binding point smaller than the maximum gray scale value to the gray scale voltage corresponding to zero brightness.
Specifically, when the gamma curve is debugged, only the gray level tie points can be debugged to simplify the debugging process and save the debugging time, a plurality of gray level tie points can be arranged in the gray levels from 0 gray level to 255 gray level, and the specific gray level values of the gray level tie points can be set by manufacturers of the driving chips without specific limitation; in this embodiment, the assignment module 203 may assign the maximum gray-scale value and the gray-scale tie points smaller than the maximum gray-scale value to the gray-scale voltage corresponding to zero brightness, and the other gray-scales smaller than the maximum gray-scale value may be automatically calculated by the driving chip, where the calculation method is, for example, an interpolation method, and since the gray-scale tie points and the gray-scale voltages corresponding to the maximum gray-scale value are both gray-scale voltages corresponding to zero brightness, the gray-scale voltages corresponding to the gray-scales smaller than the maximum gray-scale value obtained by the interpolation method are also gray-scale voltages corresponding to zero brightness; therefore, only the maximum gray-scale value and the gray-scale voltage corresponding to the gray-scale binding point smaller than the maximum gray-scale value are assigned to be the gray-scale voltage corresponding to zero brightness, so that the accuracy of the finally obtained gamma curve can be ensured, the data volume can be reduced, and the debugging time can be saved.
Optionally, the second determining module sequentially increases or decreases the gray scale voltage input to the display panel for displaying from the gray scale voltage corresponding to the preset brightness, so that the gray scale displayed by the display panel is sequentially decreased until the display result of the display panel is black when tested by the preset method.
Specifically, the gray scale voltage corresponding to the preset brightness of the display panel may be determined first, and then the gray scale voltage input to the display panel may be sequentially increased or decreased, where the increase or decrease may be determined by the gray scale voltage corresponding to zero brightness, and if the gray scale voltage corresponding to zero brightness is greater than the gray scale voltage corresponding to the preset brightness, the increase is performed; if the gray scale voltage corresponding to the zero brightness is smaller than the gray scale voltage of the preset brightness factor, the gray scale voltage is reduced; since the gray scale voltages input to the display panel are sequentially changed, an accurate maximum gray scale value can be obtained with the highest efficiency, thereby improving the debugging efficiency.
Optionally, the predetermined method is visual.
Specifically, when the maximum gray scale value of the display panel under the preset brightness is determined, the tester can visually judge the maximum gray scale value, and if the tester judges that the corresponding display result under the gray scale is black, the gray scale can be determined to be less than or equal to the maximum gray scale value; and if the tester judges that the corresponding display effect under the gray scale is not gray, the gray scale can be determined to be larger than the maximum gray scale value, and accordingly the tester can judge the maximum gray scale value corresponding to the display panel. It should be noted that, visual results of different testers on the same display panel may be different, in this embodiment, multiple testers may respectively visually inspect the display effect of the display panel to respectively determine multiple different preset gray scales, and then average multiple different maximum gray scale values to obtain a final maximum gray scale value. Wherein, the ages of a plurality of testers can be uniformly and respectively, and the sex proportions can be the same. In the embodiment, if the visual result of the tester is black, the test result of the display panel is determined to be black, so that on one hand, the cost is saved, and professional test equipment is not needed; on the other hand, the finally obtained preset gray scale better accords with the watching experience of a user, so that the Mura phenomenon of the display panel is reduced under the condition that the using effect of the display panel is not reduced.
Optionally, the preset brightness is less than or equal to 5 nits.
Specifically, if the preset brightness is high, the brightness of the display panel is also high at a low gray level, when the brightness of the display panel is high, the Mura phenomenon is weak, the brightness difference between adjacent gray levels is large, human eyes are sensitive, and if gray level voltages corresponding to gray levels lower than the maximum gray level value are assigned to be gray level voltages corresponding to zero brightness, the display effect is poor; when the preset brightness is lower, the brightness of the display panel is lower at a low gray scale correspondingly, the Mura phenomenon is more obvious, the brightness difference corresponding to the adjacent gray scales is smaller, and human eyes are insensitive to the Mura phenomenon; therefore, the preset brightness can be set to be less than or equal to 5 nits, preferably 5 nits, so that the Mura phenomenon of the display panel under low brightness and low gray scale can be improved, and the display panel can have a better display effect under high brightness or high gray scale.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed, implements a brightness adjustment method as provided in any of the embodiments of the present invention; the brightness adjusting method comprises the following steps:
determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness;
determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is black when tested by a preset method;
and assigning the gray scale voltage corresponding to the maximum gray scale value to be the gray scale voltage corresponding to zero brightness.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the brightness adjustment method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A brightness adjustment method of a display panel, the brightness adjustment method comprising:
determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness;
determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by a preset method;
assigning the gray scale voltage corresponding to each gray scale which is less than or equal to the maximum gray scale value as the gray scale voltage corresponding to zero brightness;
the determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by the preset method comprises the following steps:
and sequentially increasing or decreasing the gray scale voltage input to the display panel for displaying from the gray scale voltage corresponding to the preset brightness so as to sequentially decrease the gray scale displayed by the display panel until the display result of the display panel is black when tested by a preset method.
2. The method according to claim 1, wherein assigning the grayscale voltage corresponding to each grayscale less than or equal to the maximum grayscale value to the grayscale voltage corresponding to zero luminance comprises:
and assigning the gray scale voltage corresponding to the maximum gray scale value and the gray scale binding points smaller than the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
3. The brightness adjustment method according to claim 1, wherein the preset method is visual observation.
4. The luminance adjustment method according to claim 1, wherein the preset luminance is less than or equal to 5 nits.
5. A luminance adjustment device of a display panel, characterized in that the luminance adjustment device comprises:
the first determining module is used for determining the corresponding relation between the brightness and the gray scale within the range from zero brightness to the preset brightness;
the second determining module is used for determining the maximum gray-scale value of the display brightness of the display panel when the display brightness is tested to be black by a preset method;
the assignment module is used for assigning the gray scale voltage corresponding to each gray scale smaller than or equal to the maximum gray scale value to the gray scale voltage corresponding to zero brightness;
the second determining module sequentially increases or decreases the gray scale voltage input to the display panel for display from the gray scale voltage corresponding to the preset brightness so as to sequentially decrease the gray scale displayed by the display panel until the display result of the display panel is black when tested by a preset method.
6. The apparatus of claim 5, wherein the assigning module is configured to assign the gray scale voltage corresponding to only the maximum gray scale value and the gray scale binding points smaller than the maximum gray scale value as the gray scale voltage corresponding to zero brightness.
7. The luminance adjustment device as claimed in claim 5, wherein the preset method is visual observation.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the brightness adjustment method according to any one of claims 1-4.
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