CN109448638B - Gamma correction method, device, medium and electronic equipment for OLED display panel - Google Patents
Gamma correction method, device, medium and electronic equipment for OLED display panel 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
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- 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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- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
The disclosure relates to the technical field of display, in particular to a gamma correction method and device for an OLED display panel, a computer readable storage medium for implementing the method and electronic equipment. The method comprises the following steps: obtaining a gamma curve to be corrected of the organic light emitting diode display panel; acquiring a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve; and compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, by using a second compensation parameter smaller than the first compensation parameter, wherein the first input gray scale is in a low gray scale. In the technical scheme provided by the disclosure, the phenomenon of compensation overflow in the related art is avoided by flexibly adjusting the compensation parameters, so that the display brightness of the OLED display panel is uniform no matter high gray scale input or low gray scale input, the display quality of the OLED display panel is improved, and the use experience of a user is improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a gamma correction method for an Organic Light-Emitting Diode (OLED) display panel, a gamma correction device for an OLED display panel, and a computer-readable storage medium and an electronic device for implementing the gamma correction method for the OLED display panel.
Background
Since each pixel in the OLED display panel has a self-light emitting characteristic, non-uniformity from pixel to pixel is inevitable. Thus making Mura a potential side effect in the OLED display panel manufacturing process. Where Mura is a Japanese-derived English word meaning non-uniformity, inconsistency, or flaws. In the display field, Mura can be used to express uneven brightness display, "cloud" effect, etc. in an OLED display panel.
In view of the above problems, the related art provides a Demura scheme, which corrects or compensates a gamma curve by setting a compensation parameter, so as to solve the Mura problem in the OLED display panel. The central idea of the Demura protocol is: when the brightness of some areas of the OLED display panel is higher, the brightness of the OLED display panel is reduced; when the brightness of some areas of the OLED display panel is low, the brightness thereof is increased. So as to realize Mura compensation and further ensure that the brightness in the OLED display panel is uniformly displayed without cloud spot effect.
However, the inventors have found that the Demura scheme provided by the related art uses the same compensation parameters for both low and high input gray levels. In the case of a high gray scale input, the Mura compensation effect is significant, but in the case of a low gray scale input, if the same compensation parameter as that of the high gray scale input is used, an overflow of compensation occurs, resulting in an abnormal luminance of the OLED display panel at the low gray scale input. Therefore, there is a need to provide a new technical solution to improve one or more of the problems in the above solutions.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide a gamma correction method of an OLED display panel, a gamma correction apparatus of an OLED display panel, and a computer-readable storage medium and an electronic device implementing the gamma correction method of the OLED display panel, thereby overcoming one or more problems due to limitations and disadvantages of the related art, at least to some extent.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.
According to a first aspect of embodiments of the present disclosure, there is provided a gamma correction method of an OLED display panel, the method including:
obtaining a gamma curve to be corrected of the organic light emitting diode display panel;
acquiring a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve; and
compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, by using a second compensation parameter smaller than the first compensation parameter,
wherein the first input gray scale is at a low gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, the step of obtaining a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve includes:
obtaining a compensation formula y ═ ax + b according to the gamma curve to be corrected and the standard gamma curve,
wherein y represents an output gray scale, x represents an input gray scale, a represents a value of a compensation multiple of the input gray scale, b represents a value of a compensation amount of the input gray scale, a takes a positive number greater than 1, b takes a positive number,
wherein the first compensation parameter and the second compensation parameter both comprise a compensation multiple and a compensation amount.
In an exemplary embodiment of the disclosure, based on the foregoing solution, the compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, with the second compensation parameter, which is smaller than the first compensation parameter, includes:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the disclosure, based on the foregoing solution, the compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, with the second compensation parameter, which is smaller than the first compensation parameter, includes:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale decreases from the first input gray scale to the second input gray scale;
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
In an exemplary embodiment of the disclosure, based on the foregoing solution, the compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, with the second compensation parameter, which is smaller than the first compensation parameter, includes:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
making the compensation amount of the second compensation parameter 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, when the organic light emitting diode display panel has 256 gray scales, the first input gray scale is in a range of 0 gray scale to 64 gray scale, and the second input gray scale is in a range of 0 gray scale to 7 gray scale.
According to a second aspect of the embodiments of the present disclosure, there is provided a gamma correction device of an organic light emitting diode display panel, the device including:
the gamma correction device comprises a first acquisition module, a second acquisition module and a correction module, wherein the first acquisition module is configured to acquire a gamma curve to be corrected of the organic light-emitting diode display panel;
the second acquisition module is configured to acquire a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve; and
a compensation module configured to compensate an input gray scale of a gamma curve to be corrected smaller than a first input gray scale with a second compensation parameter smaller than the first compensation parameter,
wherein the first input gray scale is at a low gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, the second obtaining module is configured to:
obtaining a compensation formula y ═ ax + b according to the gamma curve to be corrected and the standard gamma curve,
wherein y represents an output gray scale, x represents an input gray scale, a represents a value of a compensation multiple of the input gray scale, b represents a value of a compensation amount of the input gray scale, a takes a positive number greater than 1, b takes a positive number,
wherein the first compensation parameter and the second compensation parameter both comprise a compensation multiple and a compensation amount.
In an exemplary embodiment of the present disclosure, based on the foregoing solution, the compensation module is configured to:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing solution, the compensation module is configured to:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale decreases from the first input gray scale to the second input gray scale;
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing solution, the compensation module is configured to:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
making the compensation amount of the second compensation parameter 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, when the organic light emitting diode display panel has 256 gray scales, the first input gray scale is in a range of 0 gray scale to 64 gray scale, and the second input gray scale is in a range of 0 gray scale to 7 gray scale.
According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the steps of the method in any of the above embodiments of the first aspect via execution of the executable instructions.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described in any one of the embodiments of the first aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in an embodiment of the disclosure, a to-be-corrected gamma curve of the OLED display panel is obtained by the method and the apparatus for gamma correction of the OLED display panel and the electronic device, then a first compensation parameter is obtained according to the to-be-corrected gamma curve and a standard gamma curve, and further, an input gray scale of the to-be-corrected gamma curve, which is smaller than a first input gray scale at a low gray scale, is compensated by a second compensation parameter smaller than the first compensation parameter. Thus, in the present disclosure, smaller compensation parameters are used at low gray scale input than at high gray scale input. The phenomenon of compensation overflow in the related technology is avoided by flexibly adjusting the compensation parameters, so that the display brightness of the OLED display panel is uniform no matter high gray scale input or low gray scale input, the display quality of the OLED display panel is improved, and the use experience of a user is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 schematically illustrates a flowchart of a gamma correction method of an OLED display panel in an exemplary embodiment of the present disclosure;
fig. 2 schematically illustrates a structure view of an OLED organic light emitting diode display panel having Mura in an exemplary embodiment of the present disclosure;
FIG. 3 schematically illustrates a flow chart of a gamma correction method of an OLED display panel in another exemplary embodiment of the present disclosure;
FIG. 4 is a diagram illustrating adjustment of a compensation multiple A according to an input gray scale T;
FIG. 5 schematically illustrates a flowchart of a gamma correction method of an OLED display panel in still another exemplary embodiment of the present disclosure;
FIG. 6 is a diagram illustrating adjustment of the compensation amount B according to the input gray level T;
FIG. 7 schematically illustrates a flowchart of a gamma correction method of an OLED display panel in still another exemplary embodiment of the present disclosure;
FIG. 8 is a block diagram schematically illustrating a gamma correction apparatus of an OLED display panel in an exemplary embodiment of the present disclosure;
FIG. 9 schematically illustrates a computer-readable storage medium in an exemplary embodiment of the disclosure; and
fig. 10 schematically illustrates an electronic device in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
In the Demura scheme provided by the related art, if the compensation parameter is S under the condition of high gray scale input, a better Mura compensation effect is obtained; if the same compensation parameter S is still used in the case of low gray scale input, compensation overflow may occur, i.e., the OLED display panel shows abnormal brightness (e.g., over-brightness) in the low gray scale input. For example, because of the bit number limitation of the Driver IC, when the display luminance is low at the low gray scale input, especially at the gray scale of 5 or 3, and then the above related art scheme compensates the low gray scale input, it is likely that the compensation overflow occurs, so that the luminance abnormality is shown at the gray scale.
Therefore, the compensation parameters in the Demura schemes provided by the related art are insensitive to the input gray scale values, and the size of the compensation parameters cannot be flexibly adjusted according to the change of the input gray scale values, so that the Mura compensation of the OLED display panel cannot be effectively realized.
First, a gamma correction method of an OLED display panel is provided in the present exemplary embodiment, and fig. 1 schematically illustrates a flowchart of a gamma correction method of an OLED display panel in an exemplary embodiment of the present disclosure, which overcomes the above-mentioned problems due to limitations and disadvantages of the related art, at least to some extent. The main body for executing the gamma correction method for the OLED display panel provided in this embodiment may be a device having a calculation processing function, such as a server.
Referring to fig. 1, the method may include the steps of:
step S101: obtaining a gamma curve to be corrected of the organic light emitting diode display panel;
step S102: acquiring a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve; and
step S103: and compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, by using a second compensation parameter smaller than the first compensation parameter, wherein the first input gray scale is in a low gray scale.
In the technical solution provided in the embodiment shown in fig. 1, a to-be-corrected gamma curve of the OLED display panel is obtained, then, a first compensation parameter is obtained according to the to-be-corrected gamma curve and a standard gamma curve, and further, an input gray scale of the to-be-corrected gamma curve, which is smaller than a first input gray scale at a low gray scale, is compensated by a second compensation parameter smaller than the first compensation parameter. Thus, in the present embodiment, compared to the compensation parameters in the high gray level input, the compensation parameters used in the low gray level input are smaller. The phenomenon of compensation overflow in the related technology is avoided by flexibly adjusting the compensation parameters, so that the display brightness of the OLED display panel is uniform no matter high gray scale input or low gray scale input, the display quality of the OLED display panel is improved, and the use experience of a user is improved.
Hereinafter, the respective steps of the above-described method in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 7.
In step S101, a gamma curve to be corrected of the organic light emitting diode display panel is obtained.
Due to the self-luminous property of the OLED, there is a phenomenon that the luminance of light emitted is not uniform among pixels in the OLED display panel. In this example embodiment, fig. 2 schematically illustrates a structure diagram of an OLED organic light emitting diode display panel having Mura in an example embodiment of the present disclosure. Referring to fig. 2, the luminance of the pixel corresponding to the region M is significantly smaller than that of the pixel corresponding to the region N, wherein the pixel corresponding to the region M may be used as the Mura pixel. The gamma correction is performed on the Mura, i.e. the gamma curve of the Mura pixels (i.e. the "gamma curve to be corrected") is adjusted, so that the adjusted gamma curve meets the requirement of the standard gamma curve. Therefore, Mura compensation is realized, and the brightness uniformity of the OLED display panel meets the actual design requirement.
In step S102, a first compensation parameter is obtained according to the gamma curve to be corrected and the standard gamma curve.
In an exemplary embodiment, a compensation formula y ═ ax + b may be obtained from the gamma curve to be corrected and the standard gamma curve, where: x represents an input gray scale, namely a gray scale value in a gamma curve to be corrected; y represents an output gray scale, the gray scale obtained after the input gray scale x is corrected by the compensation parameters, a represents the value of the compensation multiple A of the input gray scale, B represents the value of the compensation quantity B of the input gray scale, the value of a is a positive number larger than 1, and the value of B is a positive number. It should be noted that the value a of the compensation multiple a and the value B of the compensation amount B are values determined according to actual conditions.
In an exemplary embodiment, the compensation multiple a and the compensation amount b in the compensation formula may be collectively referred to as a compensation parameter.
For example, the first compensation parameter may include a compensation multiple and a compensation amount.
In step S103, an input gray scale of the gamma curve to be corrected, which is smaller than a first input gray scale, is compensated by a second compensation parameter, which is smaller than the first compensation parameter, wherein the first input gray scale is at a low gray scale.
In an exemplary embodiment, the second compensation parameter may also include a compensation multiple and a compensation amount, similar to the first compensation parameter. It should be noted that: the second compensation parameter is smaller than the first compensation parameter. In step S103, a smaller compensation parameter is used in the low gray-scale input than in the high gray-scale input. Therefore, the phenomenon of compensation overflow in the related technology is avoided by flexibly adjusting the compensation parameters, and the display brightness of the OLED display panel is uniform no matter high gray scale input or low gray scale input, so that the use experience of a user is improved.
In an exemplary embodiment, when the organic light emitting diode display panel has 256 gray scales, the first input gray scale is in a range of 0 gray scale to 64 gray scales. It should be noted that: the specific value of the first input gray scale is determined according to the actual situation.
Three specific implementations of step S103 are described below:
in an exemplary embodiment, fig. 3 shows an implementable implementation of step S103. The compensation factor A in the compensation parameters is adjusted to achieve the purpose of flexibly adjusting the compensation parameters, so that the phenomenon of compensation overflow in the related technology is avoided.
Referring to fig. 3, the method includes:
step S301: linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale; and the number of the first and second groups,
step S302: and enabling the compensation multiple of the second compensation parameter to be 1 as the input gray scale is reduced from the second input gray scale to 0 gray scale, wherein the second input gray scale is smaller than the first input gray scale.
In an exemplary embodiment, when the organic light emitting diode display panel has 256 gray scales, as previously described: the first input gray scale is in the range of 0 gray scale to 64 gray scale. Meanwhile, the second input gray scale is in the range of 0 gray scale to 7 gray scale. It should be noted that: the second input gray scale is smaller than the first input gray scale, and the specific values of the first input gray scale and the second input gray scale are determined according to the actual situation.
In an exemplary embodiment, fig. 4 shows a schematic diagram of adjusting the compensation factor a according to the input gray level T.
The above steps S301 and S302 are explained with reference to fig. 4 as follows:
when the input gray scale is larger than the second input gray scale T2And is smaller than the first input gray scale T1At the time of the first input gray level T1Reduced to the second input gray level T2Linearly reducing the compensation multiple A of the second compensation parameter from a to 1;
when the input gray scale is smaller than the second input gray scale T2While, with the input gray scale from the second input gray scale T2Reducing the gray scale to 0 to keep the compensation multiple A of the second compensation parameter at 1;
when the input gray scale is larger than the first input gray scale T1Keeping the compensation multiple A of the second compensation parameter as a with the increase of the input gray scale; wherein a is a positive number greater than 1.
In an exemplary embodiment, fig. 5 shows another implementable implementation of step S103. The compensation parameter can be flexibly adjusted by adjusting the compensation amount B in the compensation parameter, so that the phenomenon of compensation overflow in the related technology is avoided.
Referring to fig. 5, the method includes:
step S501: linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale; and the number of the first and second groups,
step S502: and enabling the compensation quantity of the second compensation parameter to be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale, wherein the second input gray scale is smaller than the first input gray scale.
In an exemplary embodiment, fig. 6 shows a schematic diagram of adjusting the compensation amount B according to the input gray level T.
The above steps S501 and S502 are explained as follows with reference to fig. 6:
when the input gray scale is larger than the second input gray scale T2And is smaller than the first input gray scale T1At the time of the first input gray level T1Reduced to the second input gray level T2Linearly decreasing the compensation amount B of the second compensation parameter from B to 0;
when the input gray scale is smaller than the second input gray scale T2While, with the input gray scale from the second input gray scale T2Reducing to 0 gray scale to keep the compensation quantity B of the second compensation parameter at 0;
when the input gray scale is larger than the first input gray scale T1Keeping the compensation quantity B of the second compensation parameter as B along with the increase of the input gray scale; wherein b is a positive number.
In an exemplary embodiment, fig. 7 shows yet another implementable implementation of step S103. Specifically, the compensation multiple A and the compensation amount B in the compensation parameters are adjusted simultaneously, so that the purpose of flexibly adjusting the compensation parameters is achieved, and the phenomenon of compensation overflow in the related technology is avoided.
Referring to fig. 7, the method includes:
step S701: linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
step S702: as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1;
step S703: linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale; and the number of the first and second groups,
step S704: and enabling the compensation quantity of the second compensation parameter to be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale, wherein the second input gray scale is smaller than the first input gray scale.
In an exemplary embodiment, the adjustment process of the compensation multiple a in step S701 and step S702 is the same as the specific implementation manner of the embodiment shown in fig. 3 and fig. 4, and is not described again here. The adjustment process of the compensation amount B in step S703 and step S704 is the same as the specific implementation of the embodiment shown in fig. 5 and fig. 6, and is not repeated here.
The adjusting step of the compensation factor a and the adjusting step of the compensation amount B are not performed before or after each other. For example, the adjusting step of the compensation multiple a and the adjusting step of the compensation amount B may be performed simultaneously.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc. Additionally, it will also be readily appreciated that the steps may be performed synchronously or asynchronously, e.g., among multiple modules/processes/threads.
Further, in the present exemplary embodiment, there is also provided a gamma correction device of an OLED display panel. The apparatus may be provided, for example, in an electronic device, and may particularly be provided in the form of instruction codes in a processor of the electronic device. Fig. 8 schematically illustrates a structure diagram of a gamma correction device of an OLED display panel in an exemplary embodiment of the present disclosure, and referring to fig. 8, a gamma correction device 800 of an OLED display panel may include: a first acquisition module 801, a second acquisition module 802, and a compensation module 803. Wherein:
a first obtaining module 801 configured to obtain a gamma curve to be corrected of the organic light emitting diode display panel;
a second obtaining module 802, configured to obtain a first compensation parameter according to the gamma curve to be corrected and a standard gamma curve; and
a compensation module 803 configured to compensate the input gray scale of the gamma curve to be corrected smaller than the first input gray scale with a second compensation parameter smaller than the first compensation parameter,
wherein the first input gray scale is at a low gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing solution, the second obtaining module 802 is configured to:
obtaining a compensation formula y ═ ax + b according to the gamma curve to be corrected and the standard gamma curve,
wherein y represents an output gray scale, x represents an input gray scale, a represents a value of a compensation multiple of the input gray scale, b represents a value of a compensation amount of the input gray scale, a takes a positive number greater than 1, b takes a positive number,
wherein the first compensation parameter and the second compensation parameter both comprise a compensation multiple and a compensation amount.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, the compensation module 803 is configured to:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, the compensation module 803 is configured to:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1; and the number of the first and second electrodes,
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale decreases from the first input gray scale to the second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation amount of the second compensation parameter is made to be 0; wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, the compensation module 803 is configured to:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
making the compensation amount of the second compensation parameter 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale,
wherein the second input gray scale is less than the first input gray scale.
In an exemplary embodiment of the present disclosure, based on the foregoing scheme, when the organic light emitting diode display panel has 256 gray scales, the first input gray scale is in a range of 0 gray scale to 64 gray scale, and the second input gray scale is in a range of 0 gray scale to 7 gray scale.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units. The components shown as modules or units may or may not be physical units, i.e. may be located in one place or may also be distributed over a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the wood-disclosed scheme. One of ordinary skill in the art can understand and implement it without inventive effort.
In an exemplary embodiment of the present disclosure, there is also provided a computer readable storage medium, on which a computer program is stored, which when executed by, for example, a processor, can implement the steps of the gamma correction method of the OLED display panel described in any one of the above embodiments. In some possible embodiments, aspects of the present invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present invention described in the above-mentioned gamma correction method section of an OLED display panel of the present specification, when the program product is run on the terminal device.
Referring to fig. 9, a program product 900 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be at a terminal device. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
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.
The computer readable storage 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 many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage 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 (e.g., through the internet using an internet service provider).
In an exemplary embodiment of the present disclosure, there is also provided an electronic device, which may include a processor, and a memory for storing executable instructions of the processor. Wherein the processor is configured to execute the steps of the gamma correction method of the OLED display panel in any one of the above embodiments via execution of the executable instructions.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 1000 according to this embodiment of the invention is described below with reference to fig. 10. The electronic device 1000 shown in fig. 10 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 10, the electronic device 1000 is embodied in the form of a general purpose computing device. The components of the electronic device 1000 may include, but are not limited to: at least one processing unit 1010, at least one memory unit 1020, a bus 1030 that couples various system components including the memory unit 1020 and the processing unit 1010, a display unit 1040, and the like.
Wherein the storage unit stores program codes, which can be executed by the processing unit 1010, so that the processing unit 1010 executes the steps according to various exemplary embodiments of the present invention described in the above-mentioned gamma correction method section of the OLED display panel of the present specification. For example, the processing unit 1010 may perform the steps as shown in fig. 1.
The memory unit 1020 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)10201 and/or a cache memory unit 10202, and may further include a read only memory unit (ROM) 10203.
The memory unit 1020 may also include a program/utility 10204 having a set (at least one) of program modules 10205, such program modules 10205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 1000 may also communicate with one or more external devices 1100 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1000, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 1000 to communicate with one or more other computing devices. Such communication may occur through input/output (I/O) interfaces 1050. Also, the electronic device 1000 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the internet) via the network adapter 1060. A network adapter 1060 may communicate with other modules of the electronic device 1000 via the bus 1030. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 1000, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure 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.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, for example) to execute the gamma correction method of the OLED display panel according to the embodiments of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (12)
1. A gamma correction method for an organic light emitting diode display panel is characterized by comprising the following steps:
obtaining a gamma curve to be corrected of the organic light emitting diode display panel;
acquiring a first compensation parameter according to the gamma curve to be corrected and the standard gamma curve; and
compensating an input gray scale of the gamma curve to be corrected, which is smaller than a first input gray scale, by using a second compensation parameter smaller than the first compensation parameter, wherein the first input gray scale is in a low gray scale;
wherein the step of obtaining a first compensation parameter according to the gamma curve to be corrected and a standard gamma curve comprises:
obtaining a compensation formula y ═ ax + b according to the gamma curve to be corrected and the standard gamma curve,
wherein y represents an output gray scale, x represents an input gray scale, a represents a value of a compensation multiple of the input gray scale, b represents a value of a compensation quantity of the input gray scale, a takes a positive number greater than 1, b takes a positive number, and the first compensation parameter and the second compensation parameter both comprise the compensation multiple and the compensation quantity;
the compensating the input gray scale of the gamma curve to be corrected, which is smaller than the first input gray scale, by using a second compensation parameter smaller than the first compensation parameter comprises:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale decreases from the first input gray scale to a second input gray scale, wherein the second input gray scale is smaller than the first input gray scale.
2. The gamma correction method of claim 1, wherein the compensating the input gray scale of the gamma curve to be corrected which is smaller than the first input gray scale with the second compensation parameter which is smaller than the first compensation parameter comprises:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1,
wherein the second input gray scale is less than the first input gray scale.
3. The gamma correction method of claim 2, wherein the compensating the input gray scale of the gamma curve to be corrected which is smaller than the first input gray scale with the second compensation parameter which is smaller than the first compensation parameter comprises:
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
4. The gamma correction method of claim 1, wherein the compensating the input gray scale of the gamma curve to be corrected which is smaller than the first input gray scale with the second compensation parameter which is smaller than the first compensation parameter comprises:
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
5. The gamma correction method of any one of claims 2-4, wherein when the OLED display panel has 256 gray levels, the first input gray level is in a range of 0 gray level to 64 gray levels, and the second input gray level is in a range of 0 gray level to 7 gray levels.
6. A gamma correction device of an organic light emitting diode display panel, comprising:
the gamma correction device comprises a first acquisition module, a second acquisition module and a correction module, wherein the first acquisition module is configured to acquire a gamma curve to be corrected of the organic light-emitting diode display panel;
the second acquisition module is configured to acquire a first compensation parameter according to the gamma curve to be corrected and a standard gamma curve; and
the compensation module is configured to compensate an input gray scale of a gamma curve to be corrected, which is smaller than a first input gray scale, by using a second compensation parameter smaller than the first compensation parameter, wherein the first input gray scale is in a low gray scale;
wherein the second acquisition module is configured to:
obtaining a compensation formula y ═ ax + b according to the gamma curve to be corrected and the standard gamma curve,
wherein y represents an output gray scale, x represents an input gray scale, a represents a value of a compensation multiple of the input gray scale, b represents a value of a compensation quantity of the input gray scale, a takes a positive number greater than 1, b takes a positive number, and the first compensation parameter and the second compensation parameter both comprise the compensation multiple and the compensation quantity;
the compensation module is configured to: linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale decreases from the first input gray scale to a second input gray scale, wherein the second input gray scale is smaller than the first input gray scale.
7. The gamma correction device of claim 6, wherein the compensation module is configured to:
linearly decreasing the compensation multiple of the second compensation parameter from a to 1 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
as the input gray scale is reduced from the second input gray scale to 0 gray scale, the compensation multiple of the second compensation parameter is 1,
wherein the second input gray scale is less than the first input gray scale.
8. The gamma correction device of claim 7, wherein the compensation module is configured to:
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
9. The gamma correction device of claim 7, wherein the compensation module is configured to:
linearly decreasing the compensation amount of the second compensation parameter from b to 0 as the input gray scale is decreased from the first input gray scale to a second input gray scale;
and making the compensation quantity of the second compensation parameter be 0 as the input gray scale is reduced from the second input gray scale to 0 gray scale.
10. The gamma correction device as claimed in any one of claims 7 to 9, wherein when the organic light emitting diode display panel has 256 gray levels, the first input gray level is in a range of 0 gray level to 64 gray levels, and the second input gray level is in a range of 0 gray level to 7 gray levels.
11. An electronic device, comprising:
a processor; and
memory storing a computer program which, when executed by the processor, implements the method of any one of claims 1-5.
12. A computer storage medium storing a computer program which, when executed by a processor, implements the method of any one of claims 1-5.
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