CN109377941B - Image display device and image display adjusting method - Google Patents
Image display device and image display adjusting method Download PDFInfo
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- CN109377941B CN109377941B CN201811569657.4A CN201811569657A CN109377941B CN 109377941 B CN109377941 B CN 109377941B CN 201811569657 A CN201811569657 A CN 201811569657A CN 109377941 B CN109377941 B CN 109377941B
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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
- 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]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The present disclosure provides an image display device and an adjustment method of image display. The image display device includes a maximum gradation degradation processing section. The maximum gray level degradation processing part is used for calculating the maximum value of the gray levels of the three primary colors in the pixel. If the highest value of the three primary colors is higher than a default value, the gray scale of the three primary colors with the highest value is degraded, and a second image signal is generated and supplied to a sub-frame generating part. The sub-frame generating part is used for generating a sub-frame according to the second image signal and supplying the sub-frame to the light-emitting display part.
Description
[ technical field ] A method for producing a semiconductor device
The present disclosure relates to the field of display technologies, and in particular, to an image display device and an adjustment method for image display.
[ background of the invention ]
Fig.1 shows a 2Transistor 1Capacitance (2T 1C) pixel driving circuit of a conventional Organic Light Emitting Diode (OLED). In the conventional driving method and pixel structure, different direct current driving voltages are applied to the OLED, so that the OLED displays required colors and images at different gray scale values.
After the transistor T2 is turned on by the signal received from the gate line GL, the voltage Vdl on the data line DL is coupled to the gate of the transistor T1 and stored in the capacitor Cst, so that the transistor T1 is always in the on state, the OLED is in the dc bias state for a long time, the internal ions are polarized to form a built-in electric field, which causes the threshold voltage of the OLED to increase continuously and the luminance of the light-emitting image of the OLED to decrease continuously. Emitting light for a long time shortens the lifetime of the OLED. The aging degree of each sub-pixel OLED is different, so that the display picture of the screen is uneven, and the display effect is influenced.
Therefore, it is desirable to provide an image display device and an image display adjusting method to solve the problems of the prior art.
[ summary of the invention ]
In order to solve the above-mentioned problems, an object of the present disclosure is to provide an image display device and an image display adjusting method, which can prolong the lifetime of the pixels of the oled, make the panel emit light uniformly, and have the effect of improving the display quality of the panel.
To achieve the above object, the present disclosure provides an image display device including: an Average Picture Level (APL) correcting section, a maximum gradation lowering processing section, a sub-frame generating section, and a light emitting display section. The average image level correcting part is used for calculating the average image level according to one frame of image in the received input image signal, carrying out gray scale correction, generating a first image signal and supplying the first image signal to the highest gray scale degradation processing part. The maximum gray level degradation processing part is used for calculating the maximum value of the gray levels of the three primary colors of the pixels in the first image signal. If the highest value of the three primary colors is higher than a default value, the gradation of the three primary colors having the highest value is degraded, and a second image signal is generated and supplied to the sub-frame generating section. The sub-frame generating part is used for generating a sub-frame according to the second image signal and supplying the sub-frame to the light-emitting display part.
In an embodiment of the present invention, the gradation correction method of the average picture level correction section is to decrease the level of the gradation of the input picture signal when the gradation of the input picture signal is equal to or greater than a predetermined value.
In an embodiment of the present disclosure, the gray scales of the three primary colors include a red gray scale, a green gray scale and a blue gray scale.
In an embodiment of the present invention, in the gray scale correction mode of the average image level correction portion, the level of the gray scale of the input image signal is reduced by a predetermined ratio simultaneously with the gray scales of the three primary colors.
In an embodiment of the present disclosure, if the maximum value of the gray scales of the three primary colors is not higher than the default value, the maximum gray scale degradation processing portion does not perform the degradation processing on the gray scales of the three primary colors.
The present disclosure also provides an image display adjusting method, including the following steps:
receiving an input image signal;
calculating the average image level of one frame of image in the input image signal and carrying out gray correction;
calculating the highest value of the gray scale of the three primary colors in the pixel; and
and if the highest value of the gray scales of the three primary colors is higher than a default value, performing degradation processing on the gray scales of the three primary colors with the highest value.
In an embodiment of the present disclosure, the step of calculating the average image level of the image of one frame in the input image signal and performing the gray-scale correction further includes:
judging whether the gray scale of the input image signal is more than a specified value;
and if so, reducing the level of the gray scale of the input image signal.
In an embodiment of the present disclosure, the step of reducing the level of the gray scale of the input image signal includes simultaneously reducing the gray scales of the three primary colors by a predetermined ratio.
In an embodiment of the present disclosure, the step of calculating the highest value of the gray scales of the three primary colors in the pixels includes:
the red, green, and blue gray levels among the gray levels of the three primary colors are compared and the largest one is selected.
In an embodiment of the present disclosure, if the maximum value of the gray scale of the three primary colors is not higher than the default value, the maximum gray scale degradation processing portion does not perform the degradation processing on the gray scale of the three primary colors.
In the image display device and the method for adjusting image display according to the embodiments of the present disclosure, the average image level correction section performs the gradation correction, and then the maximum gradation degradation processing section degrades the gradation with an excessively high maximum value of the gradations of the three primary colors. Therefore, the embodiment of the disclosure can effectively reduce the aging of the pixels of the respective organic light emitting diode, so that the panel can emit light uniformly, and the display quality of the panel can be improved.
In order to make the aforementioned and other aspects of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below:
[ description of the drawings ]
FIG.1 shows a conventional OLED 2T1C pixel driving circuit;
FIG. 2 is a schematic diagram of an image display device according to an embodiment of the disclosure;
FIG. 3 is a block diagram illustrating an exemplary method for adjusting image display according to an embodiment of the present disclosure; and
FIG. 4 is a block flow diagram illustrating the steps of gamma correction according to one embodiment of the present disclosure; and
fig. 5 is a schematic diagram illustrating a gray scale adjustment result of an image display adjustment method according to an embodiment of the disclosure.
[ detailed description ] embodiments
In order to make the aforementioned and other objects, features and advantages of the present disclosure comprehensible, preferred embodiments accompanied with figures are described in detail below. Furthermore, directional phrases used in this disclosure, such as, for example, upper, lower, top, bottom, front, rear, left, right, inner, outer, lateral, peripheral, central, horizontal, lateral, vertical, longitudinal, axial, radial, uppermost or lowermost, etc., refer only to the orientation of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure.
In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 2, the present disclosure provides an image display apparatus 100, including: an average image level correction part 10, a maximum gradation degradation processing part 20, a sub-frame generation part 30 and a light emitting display part 40. The average image level correction section 10 is configured to calculate an average image level from one frame image of the received input image signal, perform gray scale correction, generate a first image signal, and supply the first image signal to the maximum gray scale degradation processing section 20. The maximum gradation degradation processing section 20 is configured to calculate a maximum value of the gradations of the three primary colors of the pixels in the first image signal. If the maximum value of the three primary colors is higher than a predetermined value, the gradation of the three primary colors having the maximum value is degraded, and a second image signal is generated and supplied to the sub-frame generating part 30. The sub-frame generator 30 is used to generate a sub-frame according to the second image signal and supply the sub-frame to the light-emitting display 40.
Specifically, the default value and the degree of degradation may be adjusted according to different input frames, but the disclosure is not limited thereto.
Specifically, the image display apparatus 100 is, for example, an organic light emitting diode display device, a micro light emitting diode (micro led) display device, a light emitting diode display billboard, and the like, and the present disclosure is not limited thereto.
In the image display apparatus 100 according to an embodiment of the present disclosure, the average image level correction section 10 reduces the gray level of the input image signal when the gray level of the input image signal is a high gray image having a predetermined value or more.
Specifically, the predetermined value may be adjusted according to different input pictures, and the disclosure is not limited thereto.
In the image display device 100 according to an embodiment of the present disclosure, the three primary colors include a red gray scale R, a green gray scale G, and a blue gray scale B.
In the image display apparatus 100 according to an embodiment of the present disclosure, in the gray scale correction manner of the average image level correction section 10, the gray scale level of the input image signal is reduced by a predetermined ratio while reducing the gray scales of the three primary colors.
In the image display device 100 according to an embodiment of the present disclosure, if the maximum value of the grayscales of the three primary colors is not higher than the default value, the highest grayscale degradation processing unit does not perform the grayscale adjustment of the three primary colors.
Referring to fig. 5, for example, a three primary color gray scale S1 of a pixel in the input image signal is shown. In the gradation S2 of the three primary colors subjected to the gradation correction by the average image level correction section, the gradations of the three RGB colors are all decreased by one ratio. Of the gradations S3 of the three primary colors RGB after the processing by the highest gradation degrading processing section, only R having the highest gradation is degraded.
Referring to fig. 3, the present disclosure further provides an image display adjusting method, including the following steps:
an input image signal is received.
At block 101: and calculating the average image level of one frame of image in the image signal and performing gray scale correction.
At block 102: the highest value of the gray levels of the three primary colors in the pixel is calculated.
At block 103: and judging whether the highest value of the gray scales of the three primary colors is higher than a default value or not.
At step block 104: and if the highest value of the three primary colors is higher than the default value, performing degradation processing on the gray of the three primary colors with the highest value.
Specifically, the default value and the degree of degradation may be adjusted according to different input frames, but the disclosure is not limited thereto.
Specifically, the adjusting method of image display can be applied to the image display apparatus 100, such as an organic light emitting diode (oled) display device, a micro LED (micro LED) display device, an LED display billboard, and the like, but the disclosure is not limited thereto.
Referring to fig. 4, in an embodiment of the present disclosure, the step of calculating an average image level of a frame of image in the image signal and performing a gray-scale correction (step 101) further includes:
at block 1011: judging whether the gray scale of the input image signal is a high gray scale image above a specified value; and
if the gray level of the input image signal is a high gray level image above a predetermined value, in block 1012: the gray level of the input image signal is reduced.
Specifically, the predetermined value may be adjusted according to different input pictures, and the disclosure is not limited thereto.
In an embodiment of the present disclosure, the step of reducing the gray level of the input image signal includes simultaneously reducing the gray levels of the three primary colors by a predetermined ratio.
In an embodiment of the present disclosure, the step of calculating the highest value of the gray scales of the three primary colors in the pixels includes:
the red gray scale R, the green gray scale G and the blue gray scale B are compared and the maximum one is selected.
In an embodiment of the present disclosure, if the maximum value of the grayscales of the three primary colors is not higher than the default value, the highest grayscale degradation processing unit does not perform the adjustment of the grayscales of the three primary colors.
Referring to fig. 5, for example, a three primary color gray scale S1 of a pixel in the input image signal is shown. In the gradation S2 of the three primary colors subjected to the gradation correction by the average image level correction section, the gradations of the three RGB colors are all decreased by one ratio. Of the gradations S3 of the three primary colors RGB after the processing by the highest gradation degrading processing section, only R having the highest gradation is degraded.
At block 103: if the maximum value of the three primary colors is higher than the default value, the gradation of the three primary colors having the maximum value is degraded (in step 104).
In the image display device and the method for adjusting image display according to the embodiments of the present disclosure, the average image level correction section performs the gradation correction, and then the maximum gradation degradation processing section degrades the gradation with an excessively high maximum value of the gradations of the three primary colors. Therefore, the embodiment of the disclosure can effectively reduce the aging of the pixels of the respective organic light emitting diode, so that the panel can emit light uniformly, and the display quality of the panel can be improved.
Although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The present disclosure includes all such modifications and alterations, and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification. In addition, while a particular feature of the specification may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Furthermore, to the extent that the terms "includes," has, "" contains, "or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term" comprising.
The foregoing is merely a preferred embodiment of the present disclosure, and it should be noted that modifications and refinements may be made by those skilled in the art without departing from the principle of the present disclosure, and these modifications and refinements should also be construed as the protection scope of the present disclosure.
Claims (10)
1. An image display apparatus, comprising: an average image level correction part, a maximum gray level degradation processing part, a sub-frame generation part and a luminous display part, wherein, the average image level correction part is used for calculating the average image level according to a frame image in the received input image signal and carrying out gray level correction, then generating a first image signal and supplying the first image signal to the maximum gray level degradation processing part; the maximum gray scale degradation processing part is used for calculating the maximum value of the gray scales of the three primary colors of the pixels in the first image signal, and if the maximum value of the gray scales of the three primary colors is higher than a default value, the maximum gray scale degradation processing part only carries out degradation processing on the gray scales of the three primary colors with the maximum value, generates a second image signal and supplies the second image signal to the sub-frame generating part; the sub-frame generating part is used for generating a sub-frame according to the second image signal and supplying the sub-frame to the light-emitting display part.
2. The image display device according to claim 1, wherein the gradation correction method of the average image level correction section is such that the level of the gradation of the input image signal is lowered when the gradation of the input image signal is equal to or greater than a predetermined value.
3. The image display apparatus according to claim 2, wherein the gradations of the three primary colors include a red gradation, a green gradation, and a blue gradation.
4. The image display apparatus according to claim 3, wherein in the gradation correction mode of the average image level correction section, the level of the gradation of the input image signal is lowered by a predetermined ratio while the gradations of the three primary colors are lowered.
5. The image display device according to claim 4, wherein the highest gradation degradation processing section does not perform the degradation processing of the gradations of the three primary colors if the highest value of the gradations of the three primary colors is not higher than the default value.
6. An adjustment method for image display, comprising the steps of:
receiving an input image signal;
calculating the average image level of one frame of image in the input image signal and carrying out gray correction;
calculating the highest value of the gray scale of the three primary colors in the pixel; and
if the highest value of the three primary colors is higher than a default value, only the gray levels of the three primary colors having the highest value are subjected to degradation processing.
7. The method of adjusting image display according to claim 6, wherein the step of calculating an input average image level of one frame of the input image signal and performing input gray-scale correction further comprises:
and judging whether the gray scale of the input image signal is more than a specified value, and if so, reducing the level of the gray scale of the input image signal.
8. The method of adjusting image display according to claim 7, wherein said step of lowering said level of said gray levels of said input image signal comprises simultaneously lowering said gray levels of said three primary colors by a preset ratio.
9. The method for adjusting image display according to claim 8, wherein the step of calculating the highest value of the gray scales of the three primary colors in the pixels comprises:
the red, green, and blue gray levels among the gray levels of the three primary colors are compared and the largest one is selected.
10. The method for adjusting image display according to claim 9, wherein the degradation process of the gradation of the three primary colors is not performed if the highest value of the gradation of the three primary colors is not higher than the default value.
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| CN103051917A (en) * | 2011-10-14 | 2013-04-17 | 三星电子株式会社 | Image output apparatus and method for outputting image thereof |
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| KR101850994B1 (en) * | 2011-11-18 | 2018-04-23 | 삼성디스플레이 주식회사 | Method for controlling brightness in a display device and the display device using the same |
| CN103578391B (en) * | 2012-08-03 | 2016-02-17 | 群康科技(深圳)有限公司 | Display device and image control method thereof |
| KR102099709B1 (en) * | 2013-06-19 | 2020-04-13 | 삼성디스플레이 주식회사 | Display panel driver, method of driving display panel using the same and display apparatus having the same |
| KR102083486B1 (en) * | 2013-10-04 | 2020-05-28 | 삼성디스플레이 주식회사 | Image sticking controller and method for operating the same |
| CN103533319A (en) * | 2013-10-16 | 2014-01-22 | 东莞宇龙通信科技有限公司 | Method and device for reducing power consumption of mobile terminal |
| KR102552932B1 (en) * | 2016-01-19 | 2023-07-10 | 삼성디스플레이 주식회사 | Application processor and display device including the same |
| CN106952611B (en) * | 2017-03-14 | 2019-05-10 | Oppo广东移动通信有限公司 | A kind of grayscale setting method and user terminal |
| CN106991972B (en) * | 2017-05-02 | 2019-05-03 | 深圳市华星光电半导体显示技术有限公司 | A kind of booting brightness control method of organic luminous panel |
| CN108510937A (en) * | 2018-03-26 | 2018-09-07 | 青岛海信电器股份有限公司 | A kind of display control method and device |
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| CN101903937A (en) * | 2007-12-20 | 2010-12-01 | 夏普株式会社 | Display device |
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