CN108694906B - Brightness adjusting method of display panel and computer readable medium - Google Patents
Brightness adjusting method of display panel and computer readable medium Download PDFInfo
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- CN108694906B CN108694906B CN201810863538.3A CN201810863538A CN108694906B CN 108694906 B CN108694906 B CN 108694906B CN 201810863538 A CN201810863538 A CN 201810863538A CN 108694906 B CN108694906 B CN 108694906B
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The invention discloses a brightness adjusting method and a computer readable medium of a display panel, when the actual brightness value of the display panel is determined not to meet the requirement of brightness uniformity, according to the difference between the target gray level value corresponding to the target brightness value and the actual gray level value corresponding to the actual brightness value, the target gray level value is compensated to obtain a compensation brightness value, then when the compensation brightness value is determined not to reach the set range of the target brightness value, the target brightness value is compensated again according to the steps until the latest compensation brightness value reaches the set range between the target brightness value and the target brightness value. Through the brightness compensation process, the uniformity of the display panel can be adjusted quickly and accurately.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a brightness adjustment method for a display panel and a computer readable medium.
Background
Currently, there is a certain requirement for the display brightness uniformity of a flat panel display panel, for example, for an electroluminescent display panel as a self-luminous device, the brightness of each region is influenced by a light-Emitting (EL) material and the uniformity of a control back plate, which has a relatively high requirement for the brightness display uniformity, and in the actual production process, the OLED display uniformity often cannot reach a preset value.
Disclosure of Invention
Embodiments of the present invention provide a brightness adjustment method for a display panel and a computer readable medium for adjusting brightness uniformity of the display panel.
Therefore, an embodiment of the present invention provides a method for adjusting brightness of a display panel, including:
according to a set gamma curve, determining a target brightness value and a corresponding target gray-scale value in a selected gamma value range;
driving the display panel by adopting the target gray-scale value to obtain the actual brightness value of each pixel in the display panel;
determining whether the actual brightness value meets a set brightness uniformity requirement;
when the actual brightness value is determined not to reach the set brightness uniformity requirement, compensating the target gray scale value according to the difference between the target gray scale value corresponding to the target brightness value and the actual gray scale value corresponding to the actual brightness value to obtain a compensation brightness value;
determining whether the compensation brightness value reaches a set range of the target brightness value;
when the compensation brightness value is determined not to reach the set range of the target brightness value, driving the display panel by adopting the compensation gray scale value corresponding to the compensation brightness value to obtain the latest actual brightness value; and compensating the target gray-scale value according to the difference between the target gray-scale value and the actual gray-scale value corresponding to the latest actual brightness value to obtain the latest compensation brightness value until the latest compensation brightness value reaches the set range between the latest compensation brightness value and the target brightness value.
In a possible implementation manner, in the brightness adjustment method provided in the embodiment of the present invention, the method further includes:
and when the latest compensation brightness value is determined to reach the set range of the target brightness value, displaying by adopting the compensation gray-scale value corresponding to the latest compensation brightness value.
In a possible implementation manner, in the brightness adjustment method provided in the embodiment of the present invention, the method further includes:
and when the actual brightness value is determined to meet the set brightness uniformity requirement, displaying by adopting the actual gray scale value corresponding to the actual brightness value.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the determining whether the actual brightness value meets a set brightness uniformity requirement specifically includes:
dividing the display panel into a plurality of regions;
determining whether the maximum brightness value and the minimum brightness value in the actual brightness values of the pixels in each region satisfy the following formula:
|Lmax-Lmin|≤Lmaxa%, wherein LmaxRepresents the maximum luminance value, LminRepresenting the minimum brightness value, wherein A is a set specification;
if yes, determining that the actual brightness value in the area meets the set brightness uniformity requirement;
and if not, determining that the actual brightness value in the area does not reach the set brightness uniformity requirement.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the determining whether the actual brightness value meets a set brightness uniformity requirement specifically includes:
determining whether the actual luminance value and the target luminance value of each of the pixels satisfy the following formula:
|Li-Lgoal|≤Lgoala%, wherein LiRepresenting said actual luminance value, LgoalRepresenting the target brightness value, wherein A is a set specification;
if yes, determining that the actual brightness value of the pixel meets the set brightness uniformity requirement;
and if not, determining that the actual brightness value of the pixel does not reach the set brightness uniformity requirement.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the compensating for the target gray-scale value according to a difference between the target gray-scale value corresponding to the target brightness value and the actual gray-scale value corresponding to the actual brightness value to obtain a compensated brightness value specifically includes:
determining an actual gray scale value corresponding to the actual brightness value according to the set gamma curve;
determining a difference between the actual gray scale value and the target gray scale value;
and compensating the target gray scale value according to the determined difference value to obtain the compensation brightness value.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the determining a difference between the actual gray-scale value and the target gray-scale value specifically includes:
determining a difference between the actual gray scale value and the target gray scale value using the following formula:
wherein L isiRepresenting said actual luminance value, LgoalRepresents the target brightness value, L255Representing the maximum brightness value, Δ GrayiRepresenting the difference between the actual gray level value and the target gray level value, Г representing a set point.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the compensating the target gray-scale value according to the determined difference to obtain the compensated brightness value specifically includes:
determining the compensated brightness value using the following formula:
wherein L isi+1Representing said compensated luminance value, L255Representing the maximum brightness value, GraygoalRepresenting said target brightness value, Δ GrayiRepresenting the difference between the actual gray level value and the target gray level value, Г representing a set point.
In a possible implementation manner, in the brightness adjustment method provided in an embodiment of the present invention, the determining whether the compensation brightness value reaches a set range of the target brightness value specifically includes:
determining whether the compensation brightness value and the target brightness value satisfy the following formula:
|Li+1-Lgoal|≤Lgoala%, wherein Li+1Representing said compensated luminance value, LgoalRepresenting the target brightness value, wherein A is a set specification;
if yes, determining that the compensation brightness value reaches a set range of the target brightness value;
if not, determining that the compensation brightness value does not reach the set range of the target brightness value.
In another aspect, an embodiment of the present invention further provides a computer-readable medium, which includes program code, and when the program code runs on a computing device, the program code is configured to enable the computing device to execute the steps of the method for adjusting brightness of a display panel provided by an embodiment of the present invention.
The embodiment of the invention has the beneficial effects that:
in the method for adjusting brightness of a display panel and the computer readable medium according to the embodiments of the present invention, when it is determined that an actual brightness value of the display panel does not satisfy a brightness uniformity requirement, a compensation brightness value is obtained by compensating a target gray scale value according to a difference between the target gray scale value corresponding to the target brightness value and an actual gray scale value corresponding to the actual brightness value, and then the target brightness value is compensated again according to the above steps until a latest compensation brightness value reaches a set range between the target brightness value and the target brightness value when it is determined that the compensation brightness value does not reach the set range between the target brightness value and the target brightness value. Through the brightness compensation process, the uniformity of the display panel can be adjusted quickly and accurately.
Drawings
Fig. 1 is a schematic general flow chart of a brightness adjustment method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a brightness adjustment method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a relationship between luminance and gray scale according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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.
An embodiment of the present invention provides a method for adjusting brightness of a display panel, as shown in fig. 1, including:
s101, according to a set gamma curve, determining a target brightness value and a corresponding target gray scale value in a selected gamma value range;
s102, driving a display panel by adopting a target gray scale value, and acquiring an actual brightness value of each pixel in the display panel;
s103, determining whether the actual brightness value meets the set brightness uniformity requirement; executing step S104 when the actual brightness value is determined not to reach the set brightness uniformity requirement;
s104, compensating the target gray scale value according to the difference value between the target gray scale value corresponding to the target brightness value and the actual gray scale value corresponding to the actual brightness value to obtain a compensation brightness value;
s105, determining whether the compensation brightness value reaches a set range of a target brightness value; when the compensation brightness value is determined not to reach the set range of the target brightness value, executing step S106;
s106, driving the display panel by adopting the compensation gray scale value corresponding to the compensation brightness value to obtain the latest actual brightness value; thereafter, steps S104 to S105 are repeatedly performed until step S105 determines that the latest compensation luminance value reaches the set range with the target luminance value.
Specifically, in the method for adjusting brightness of a display panel according to an embodiment of the present invention, when it is determined that an actual brightness value of the display panel does not satisfy a brightness uniformity requirement, the target gray-scale value is compensated according to a difference between a target gray-scale value corresponding to the target brightness value and an actual gray-scale value corresponding to the actual brightness value to obtain a compensated brightness value, and then the target brightness value is compensated again according to the above steps until a latest compensated brightness value reaches a set range between the target brightness value and the target brightness value when it is determined that the compensated brightness value does not reach the set range between the target brightness value and the target brightness value. Through the brightness compensation process, the uniformity of the display panel can be adjusted quickly and accurately.
Specifically, in the brightness adjusting method provided by the embodiment of the present invention, in the step S101, the target brightness of each gray-scale pixel under the gray scales of 0-255 may be specifically set according to a Gamma (Gamma) curve set by the panel display. Then, a target brightness value and a corresponding target gray scale value are generally selected within a gamma value range of 2.0-2.4. The target brightness value and the corresponding target gray-scale value may be determined according to the following formula:
wherein, GraygoalRepresents a target gray level value, LgoalRepresenting a target brightness value, L255The maximum brightness value is a predetermined fixed value, and Г is a set value.
Specifically, in the brightness adjustment method provided in the embodiment of the present invention, in step S102, an actual brightness value of each pixel in the display panel may be obtained by using a brightness meter. When the display panel is driven by adopting the target gray-scale value and is an organic electroluminescent display panel, the display brightness of the display panel can be adjusted by adopting a mode of controlling the current; when the display panel is a liquid crystal display panel, the display brightness of the display panel can be adjusted by specifically controlling the voltage.
Specifically, in the brightness adjusting method provided in the embodiment of the present invention, in the step S103, it is determined whether the actual brightness value meets the set brightness uniformity requirement, if not, it indicates that the display brightness of the display panel needs to be adjusted, that is, the following steps S104 to S106 are performed; if so, the display brightness of the display panel does not need to be adjusted. Based on this, optionally, in the brightness adjusting method provided in the embodiment of the present invention, as shown in fig. 1, when determining whether the actual brightness value meets the set brightness uniformity requirement in step S103, the method may further include: when the actual brightness value is determined to meet the set brightness uniformity requirement, executing step S107;
and S107, displaying by adopting the actual gray scale value corresponding to the actual brightness value.
Optionally, in the brightness adjustment method provided in the embodiment of the present invention, there are various ways for determining whether the actual brightness value meets the set brightness uniformity requirement in the step S103, for example, the uniformity may be determined by regions to increase the operation speed, and based on this, the step S103 may specifically include:
firstly, dividing a display panel into a plurality of areas; specifically, the display panel may be equally divided into M × N regions, for example, may be divided into 4 × 4 regions; the more the area division is, the more accurate the uniformity judgment is, and the larger the calculated amount is;
then, whether the maximum brightness value and the minimum brightness value in the actual brightness values of the pixels in each area satisfy the following formula is determined:
|Lmax-Lmin|≤Lmaxa%, wherein LmaxRepresents the maximum brightness value, LminRepresenting the minimum brightness value, A is a set specification; a can generally be selected to be a value around 95;
if yes, determining that the actual brightness value in the area meets the set brightness uniformity requirement;
if not, the actual brightness value in the area is determined not to reach the set brightness uniformity requirement.
Specifically, by determining the maximum brightness value and the minimum brightness value in each region, determining whether the difference between the maximum brightness value and the minimum brightness value meets the set range, it can be determined whether the brightness uniformity of each region meets the requirement, if a certain region meets the requirement, the subsequent step is not required to be performed on the region, so as to reduce the amount of calculation, and if a certain region does not meet the requirement, the step of performing subsequent brightness adjustment on the region is only required. Generally, the area of the display panel with uneven brightness only occupies a small part, so that the requirement of the overall brightness uniformity can be met only by adjusting the brightness of the pixels in the small part of the area, the calculation amount is small, and the requirement of rapidly and accurately improving the uniformity of the display panel can be met.
Or, optionally, in the brightness adjustment method provided in the embodiment of the present invention, the step S103 of determining whether the actual brightness value meets the set brightness uniformity requirement may also perform a one-by-one uniformity judgment on the brightness of each pixel to improve the judgment accuracy, based on which the step S103 may specifically include:
determining whether the actual brightness value and the target brightness value of each pixel satisfy the following formula:
|Li-Lgoal|≤Lgoala%, wherein LiRepresenting the actual brightness value, LgoalRepresenting a target brightness value, A is a set specification; a can generally be selected to be a value around 95;
if yes, determining that the actual brightness value of the pixel meets the set brightness uniformity requirement;
if not, the actual brightness value of the pixel is determined not to reach the set brightness uniformity requirement.
Specifically, by determining the actual brightness value and the set target brightness value of each pixel, and determining whether the difference between the actual brightness value and the set target brightness value meets the set range, it can be determined whether the brightness uniformity of each pixel meets the requirement, if a certain pixel meets the requirement, the subsequent step is not needed for the pixel, so as to reduce the amount of calculation, and if a certain pixel does not meet the requirement, the subsequent step of brightness adjustment is only needed for the pixel. Generally, pixels with uneven brightness of the display panel only occupy a small part, so that the requirement of the uniformity of the overall brightness can be met only by adjusting the brightness of the small part of pixels, the calculated amount is small, and the requirement of rapidly and accurately improving the uniformity of the display panel can be met.
Optionally, in the brightness adjustment method provided in the embodiment of the present invention, when it is determined that the actual brightness value does not meet the requirement of brightness uniformity, the step S104 compensates the target gray-scale value according to a difference between the target gray-scale value corresponding to the target brightness value and the actual gray-scale value corresponding to the actual brightness value to obtain a compensated brightness value, as shown in fig. 2, the method may specifically include:
s1041, determining an actual gray scale value corresponding to the actual brightness value according to a set gamma curve;
s1042, determining a difference value between the actual gray-scale value and the target gray-scale value;
and S1043, compensating the target gray-scale value according to the determined difference value to obtain a compensation brightness value.
Specifically, since the actual gamma curve is unknown, when the actual gray scale value is calculated in step S1041, the actual gray scale value can be calculated only according to the set gamma curve, and specifically, the actual gray scale value corresponding to the actual brightness value can be determined according to the following formula:
wherein, GrayiRepresenting the actual gray level, LiRepresenting the actual brightness value, L255The maximum brightness value is a predetermined fixed value, and Г is a set value.
Optionally, in the brightness adjustment method provided in the embodiment of the present invention, the step S1042 determines a difference between the actual gray-scale value and the target gray-scale value, and the difference between the actual gray-scale value and the target gray-scale value may be determined by specifically using the following formula:
wherein L isiRepresenting the actual brightness value, LgoalRepresenting a target brightness value, L255Representing the maximum brightness value, Δ GrayiAnd the difference value between the actual gray scale value and the target gray scale value is represented, the difference value is a positive value when the actual gray scale value is greater than the target gray scale value, and the difference value is a negative value when the actual gray scale value is less than the target gray scale value.
Optionally, in the brightness adjustment method provided in the embodiment of the present invention, in the step S1043, the compensation brightness value is obtained according to the determined difference compensation target gray scale value, and the compensation brightness value may be determined specifically by using the following formula:
wherein L isi+1Represents a compensated luminance value, L255Representing the maximum brightness value, GraygoalRepresenting a target brightness value, Δ GrayiRepresenting the difference between the actual gray scale value and the target gray scale value.
Optionally, in the brightness adjustment method provided in the embodiment of the present invention, in the step S105, it is determined whether the compensation brightness value reaches a set range of the target brightness value, and specifically, it may be determined whether the compensation brightness value and the target brightness value satisfy the following formula:
|Li+1-Lgoal|≤Lgoala%, where Li +1 represents a compensation brightness value, LgoalThe target brightness value is shown, A is a set specification, and A can be a value generally about 95;
if yes, determining that the compensation brightness value reaches a set range of the target brightness value;
if not, determining that the compensation brightness value does not reach the set range of the target brightness value.
Specifically, in the brightness adjustment method provided in the embodiment of the present invention, by comparing whether the compensated brightness value and the target brightness value satisfy 95% of the specification, if yes, it is indicated that the compensated brightness value can meet the requirement of brightness uniformity; if not, compensating according to the previous steps until the preset target is met.
Based on this, in the brightness adjustment method provided in the embodiment of the present invention, as shown in fig. 1, when determining whether the compensation brightness value reaches the set range of the target brightness value in step S105, the method may further include: when determining that the latest compensation brightness value reaches the set range of the target brightness value, executing step S108;
and S108, displaying by adopting the compensation gray scale value corresponding to the latest compensation brightness value.
Specifically, to better explain the brightness adjustment method provided by the embodiment of the present invention, as shown in fig. 3, the brightness of the pixel before and after compensation is shown. According to the set Gamma curve, the method comprises the following steps of,target luminance value L of pixelgoalIs point A, and the corresponding Gray scale value is GraygoalBut displays the actual brightness value L obtained by actual measurement according to the target gray-scale valueiJudging that the point B does not meet the requirement of brightness uniformity for the point B, belongs to a Mura area, has an unknown actual Gamma curve, and calculates according to a preset Gamma curve, namely calculating the Gray level value corresponding to the point C in the preset Gamma curve as the calculated actual Gray level value GrayiThen the Gray level difference between the C point and the A point is △ GrayiCompensating for point B, i.e. in GraygoalOn the basis of (1), △ Gray is addediDetermining the compensation brightness value output according to the actual Gamma curve as Li+1If | Li+1-Lgoal|≤Lgoal95%, the compensation is ended, if not, the compensation is continued according to the above method until the formula is satisfied.
Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable medium, which includes program code, and when the program code runs on a computing device, the program code is configured to enable the computing device to execute the steps of the above method for managing and controlling an empty card. Since the principle of the computer-readable medium for solving the problem is similar to the aforementioned method for managing and controlling the empty card, the implementation of the computer-readable medium can refer to the implementation of the method for adjusting the brightness of the display panel, and repeated details are not repeated.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A display product according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a server device. However, the program product of the present invention is not limited thereto, and in this document, the readable storage medium may be any tangible medium containing or storing the program, which can be used by or in connection with an information transmission, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the periodic network action system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device.
Through the above description of the embodiments, it is clear to those skilled in the art that the embodiments of the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A method for adjusting brightness of a display panel includes:
according to a set gamma curve, determining a target brightness value and a corresponding target gray-scale value in a selected gamma value range;
driving the display panel by adopting the target gray-scale value to obtain the actual brightness value of each pixel in the display panel;
determining whether the actual brightness value meets a set brightness uniformity requirement;
when the actual brightness value is determined not to reach the set brightness uniformity requirement, determining an actual gray scale value corresponding to the actual brightness value according to the set gamma curve; determining a difference between the actual gray scale value and the target gray scale value; compensating the target gray scale value according to the determined difference value to obtain a compensation brightness value;
the determining a difference between the actual gray-scale value and the target gray-scale value specifically includes:
determining a difference between the actual gray scale value and the target gray scale value using the following formula:
wherein L isiRepresenting said actual luminance value, LgoalRepresents the target brightness value, L255Representing the maximum brightness value, Δ GrayiRepresenting a difference between the actual gray level value and the target gray level value, Г representing a set value;
the compensating the target gray scale value according to the determined difference value to obtain a compensation brightness value specifically includes:
determining the compensated brightness value using the following formula:
wherein L isi+1Representing said compensated luminance value, L255Representing the maximum brightness value, GraygoalRepresenting said target brightness value, Δ GrayiRepresenting a difference between the actual gray level value and the target gray level value, Г representing a set value;
determining whether the compensation brightness value reaches a set range of the target brightness value;
when the compensation brightness value is determined not to reach the set range of the target brightness value, driving the display panel by adopting the compensation gray scale value corresponding to the compensation brightness value to obtain the latest actual brightness value; and compensating the target gray-scale value according to the difference between the target gray-scale value and the actual gray-scale value corresponding to the latest actual brightness value to obtain the latest compensation brightness value until the latest compensation brightness value reaches the set range of the target brightness value.
2. The luminance adjustment method as set forth in claim 1, further comprising:
and when the latest compensation brightness value is determined to reach the set range of the target brightness value, displaying by adopting the compensation gray-scale value corresponding to the latest compensation brightness value.
3. The luminance adjustment method as set forth in claim 1, further comprising:
and when the actual brightness value is determined to meet the set brightness uniformity requirement, displaying by adopting the actual gray scale value corresponding to the actual brightness value.
4. The method of claim 1, wherein the determining whether the actual brightness value meets a set brightness uniformity requirement comprises:
dividing the display panel into a plurality of regions;
determining whether the maximum brightness value and the minimum brightness value in the actual brightness values of the pixels in each region satisfy the following formula:
|Lmax-Lmin|≤Lmaxa%, wherein LmaxRepresents the maximum luminance value, LminRepresenting the minimum brightness value, wherein A is a set specification;
if yes, determining that the actual brightness value in the area meets the set brightness uniformity requirement;
and if not, determining that the actual brightness value in the area does not reach the set brightness uniformity requirement.
5. The method of claim 1, wherein the determining whether the actual brightness value meets a set brightness uniformity requirement comprises:
determining whether the actual luminance value and the target luminance value of each of the pixels satisfy the following formula:
|Li-Lgoal|≤Lgoala%, wherein LiRepresenting said actual luminance value, LgoalRepresenting the target brightness value, wherein A is a set specification;
if yes, determining that the actual brightness value of the pixel meets the set brightness uniformity requirement;
and if not, determining that the actual brightness value of the pixel does not reach the set brightness uniformity requirement.
6. The method according to any one of claims 1 to 5, wherein the determining whether the compensation brightness value reaches the set range of the target brightness value specifically comprises:
determining whether the compensation brightness value and the target brightness value satisfy the following formula:
|Li+1-Lgoal|≤Lgoala%, wherein Li+1Representing said compensated luminance value, LgoalRepresenting the target brightness value, wherein A is a set specification;
if yes, determining that the compensation brightness value reaches the set range of the target brightness value;
if not, determining that the compensation brightness value does not reach the set range of the target brightness value.
7. A computer-readable medium, characterized by comprising program code for causing a computing device to perform the steps of the method for adjusting brightness of a display panel according to any one of claims 1-6, when the program code is run on the computing device.
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| CN110010065B (en) * | 2019-04-30 | 2021-01-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel brightness adjusting method and display panel brightness adjusting system |
| CN110148388B (en) * | 2019-05-22 | 2021-07-30 | 京东方科技集团股份有限公司 | Method and device for determining pixel compensation value, electronic equipment and storage medium |
| CN110288556B (en) * | 2019-07-04 | 2021-10-22 | 京东方科技集团股份有限公司 | Image processing method and device and display equipment |
| CN111798799B (en) * | 2020-06-29 | 2021-09-14 | 昆山国显光电有限公司 | Gamma adjusting method and device of display panel |
| CN112071263B (en) * | 2020-09-04 | 2022-03-18 | 京东方科技集团股份有限公司 | Display method and display device of display panel |
| CN112767867B (en) * | 2021-01-28 | 2022-08-09 | 昆山国显光电有限公司 | Display panel and brightness compensation method and device thereof |
| CN113252526A (en) * | 2021-05-10 | 2021-08-13 | 中国气象局上海物资管理处 | System and method for artificial rainfall and spray cleaning of visibility measurement test shelter |
| CN113990267B (en) * | 2021-11-02 | 2023-01-24 | Tcl华星光电技术有限公司 | Pixel brightness compensation method and device, storage medium and display panel |
| CN114170947B (en) * | 2021-12-14 | 2023-05-30 | 武汉华星光电半导体显示技术有限公司 | Mura compensation method of display panel and display panel |
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| CN105741763B (en) * | 2016-03-31 | 2018-01-30 | 深圳市华星光电技术有限公司 | The method for eliminating OLED display panel Mura |
| CN106782307B (en) * | 2017-01-25 | 2019-07-05 | 上海天马有机发光显示技术有限公司 | A kind of gray level compensation method and gray scale compensation system of OLED display panel |
| CN106847157B (en) * | 2017-03-24 | 2020-01-21 | 上海天马有机发光显示技术有限公司 | Brightness compensation method and device of display panel |
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