CN108573678B - Display method and device - Google Patents
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- CN108573678B CN108573678B CN201710142216.5A CN201710142216A CN108573678B CN 108573678 B CN108573678 B CN 108573678B CN 201710142216 A CN201710142216 A CN 201710142216A CN 108573678 B CN108573678 B CN 108573678B
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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]
- G09G3/3225—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] using an active matrix
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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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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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
- G09G2320/0257—Reduction of after-image effects
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a display method and a display device, which are used for reducing a mura phenomenon during display, and the method comprises the steps of firstly obtaining an original gray scale of a current pixel, then judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value, and for a low-gray-scale pixel, if the original gray scale of the pixel is not larger than the preset gray scale threshold value, dividing the original gray scale into first display data and second display data and sequentially displaying the first display data and the second display data, wherein the first display data are black display data, and the sum of the brightness of the first display data and the second display data is equal to the brightness of the original gray scale of the pixel. In this scheme, first display data are black display data, and black interface makes user's eyes can't observe the mura phenomenon when the black gray scale shows, and the luminance of second display data can increase and need reduce voltage, and voltage is lower this type of mura is more slight to realized reducing the effect of mura phenomenon, effectively improved or eliminated the most horizontal mura of the screen body, improve display effect, promote module output yield.
Description
Technical Field
The invention relates to the field of displays, in particular to a display method and a display device.
Background
Currently, high definition display is the developing direction of display technology. An OLED (Organic Light-emitting diode) has the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, fast reaction speed, and the like, and is widely used. An AMOLED (Active-matrix organic light emitting diode or Active-matrix organic light emitting diode) is one of OLED technologies, and three independent colors of light R, G, B are realized by using multiple layers of organic compounds.
In the picture with the same light source and the same ground color, the color difference with different degrees is visually perceived and called mura. At present, the AMOLED module generally has the problem of transverse mura, and mura means spots, which means the phenomenon that the brightness of a display is uneven to cause various traces. The mura not only influences the holistic visual effect of module, influences whole yield and synthesizes productivity simultaneously and promotes, makes whole manufacturing cost increase, and the solution of horizontal mura also becomes the key point that present yield promoted. At present, experiments prove that transverse mura is sensitive to data voltage, the lower the voltage is, the more slight the mura phenomenon is, and the higher the voltage is, the more obvious the mura phenomenon is.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to solve the mura defect of the display screen in the prior art.
The embodiment of the invention provides a display method, which comprises the following steps: acquiring an original gray scale of a current pixel; judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value or not; if the original gray scale of the pixel is not larger than a preset gray scale threshold value, dividing the original gray scale into first display data and second display data and displaying the first display data and the second display data in sequence, wherein the first display data are black gray scale display data, and the sum of the brightness of the first display data and the brightness of the second display data is equal to the brightness of the original gray scale of the pixel.
Optionally, the method further includes displaying gray scale display data corresponding to the original gray scale if the gray scale of the pixel is greater than a preset gray scale threshold.
Optionally, in the step of sequentially displaying the first display data and the second display data, the number of times of refreshing the pixels is increased to twice the original number of times of refreshing, where half of the number of times is used for refreshing the first display data, and the other half of the number of times is used for refreshing the second display data.
Optionally, in the step of displaying the gray scale display data corresponding to the original gray scale, after the number of times of refreshing the pixel is increased to twice the original number of times of refreshing, the display data corresponding to the gray scale is displayed in each refreshing.
Optionally, the preset grayscale threshold is set according to the maximum brightness of the screen body and the size of the screen body.
In addition, the present invention also provides a display device comprising: the acquisition unit is used for acquiring the original gray scale of the current pixel; the judging unit is used for judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value or not; and the adjustment output unit is used for dividing the original gray scale into first display data and second display data and displaying the first display data and the second display data in sequence if the original gray scale of the pixel is not larger than a preset gray scale threshold, wherein the first display data is black gray scale display data, and the sum of the brightness of the first display data and the brightness of the second display data is equal to the brightness of the original gray scale of the pixel.
Optionally, the display device further includes a normal output unit, configured to display gray scale display data corresponding to an original gray scale if the original gray scale of the pixel is greater than a preset gray scale threshold.
Optionally, in the adjustment output unit, the refresh rate of the pixel is increased to twice the original refresh rate, where half of the refresh rate is used for refreshing the first display data, and the other half of the refresh rate is used for refreshing the second display data.
Optionally, the normal output unit includes an output subunit, and the grayscale display data corresponding to the original grayscale is displayed in each refresh after the refresh frequency of the pixel is increased to twice the original refresh frequency.
Optionally, the preset grayscale threshold is set according to the maximum brightness of the screen body and the size of the screen body.
The technical scheme of the invention has the following advantages:
1. the display method is used for reducing the mura phenomenon during display, firstly, the original gray scale of a current pixel is obtained, then whether the original gray scale of the pixel is larger than a preset gray scale threshold value or not is judged, and for a low-gray-scale pixel, if the original gray scale of the pixel is not larger than the preset gray scale threshold value, the original gray scale is divided into first display data and second display data to be sequentially displayed, wherein the first display data are black display data, and the sum of the brightness of the first display data and the brightness of the second display data is equal to the brightness of the original gray scale of the pixel. In this scheme, since the sum of the luminance of the first display data and the luminance of the second display data is equal to the original luminance, the display effect can be ensured. The inserted first display data is black gray scale display data, and the mura phenomenon can not be observed by eyes of a user due to a black interface although the voltage is higher during black gray scale display, so that the mura phenomenon can be ignored during black gray scale display. In order to make the sum of the brightness of the first display data and the brightness of the second display data equal to the original brightness, when the first display data is black gray scale data, the brightness of the second display data needs to be increased, and when the brightness is improved, the voltage needs to be reduced, and the second display data can meet the brightness requirement by reducing the voltage. Because the horizontal mura is sensitive to the data voltage, the lower the data voltage is, the more slight the mura is, and the effect of reducing the mura phenomenon is realized. According to the scheme, most transverse mura of the screen body can be effectively improved or eliminated, the display effect is improved, and the yield of the module output is improved.
2. The display method provided by the invention has higher brightness for the pixels with high gray scale, and the corresponding data voltage value is smaller, so that the mura phenomenon is not obvious under the condition of high gray scale, and special processing is not needed, so that the data operation amount can be greatly reduced by processing only the pixels with obvious mura phenomenon of the pixels with low gray scale.
3. According to the display method provided by the invention, the refreshing frequency of the pixel needs to be increased to twice of the original refreshing frequency, wherein one half of the refreshing frequency is used for refreshing the first display data, and the other half of the refreshing frequency is used for refreshing the second display data, and the refreshing frequency of the actual display picture is the same as the original refreshing frequency, so that the refreshing frequency of the display picture is ensured to be unchanged, and the display effect is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart showing a specific example of a display method in embodiment 1 of the present invention;
fig. 2 is a block diagram showing a specific example of the display device in embodiment 1 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a display method, which is used for overcoming a mura phenomenon of a display during low gray scale display, distinguishing gray scales for a single pixel point for processing, determining whether mura reduction processing needs to be performed according to the self condition of a screen body of the display screen, and executing the method in a driving controller of the display screen which needs mura reduction processing, wherein a flow chart is shown in fig. 1 and comprises the following steps:
and S1, acquiring the original gray scale of the current pixel. The gray scale value of the pixel point to be displayed can be obtained through a Driver IC (drive chip).
S2, judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value. Because the mura phenomenon is more obvious when the pixels with low gray scales are displayed and is not obvious when the pixels with high gray scales are displayed, the mura is reduced only aiming at the pixels with low gray scales, and the data calculation amount can be reduced.
The preset gray level threshold is a preset value, the selection of the threshold has greater relevance with the maximum brightness of the screen body/module, the size of the screen body and the condition of the screen body, and the threshold is determined according to the actual situation in the actual application. For example, for a large screen or a very large screen, the brightness requirement is high, and the above processing may be performed on all gray levels, and at this time, the gray level threshold is set to be very high. In other cases, the threshold is set not so large, for example, to 200. The threshold value is generally set to be low, and the data processing amount can be reduced.
When the original gray level of the pixel is not greater than the predetermined gray level threshold, step S3 is executed, and when the original gray level of the pixel is greater than the predetermined gray level threshold, step S4 is executed.
S3, if the original gray scale of the pixel is not greater than the preset gray scale threshold, dividing the original gray scale into a first display data and a second display data, where the first display data is a black display data, a sum of the luminances of the first display data and the second display data is equal to the luminance of the original gray scale of the pixel, and the black display data may be selected as a gray scale (0, 0, 0) data or a data whose display effect is close to that of the black display data is similar to a black picture.
The inserted first display data is black gray scale display data, and the mura phenomenon can not be observed by eyes of a user due to a black interface although the voltage is higher during black gray scale display, so that the mura phenomenon can be ignored during black gray scale display. In order to enable the sum of the brightness of the first display data and the brightness of the second display data to be equal to the original brightness, when the first display data are black gray scale data, the brightness of the second display data needs to be increased, and when the brightness is improved, the voltage needs to be reduced. According to the scheme, most transverse mura of the screen body can be effectively improved or eliminated, the display effect is improved, and the yield of the module output is improved.
The first display data and the second display data can be calculated according to energy, first energy is calculated according to the brightness of the first display data and the first display time, then, second energy is calculated according to the brightness of the second display data and the second display time, third energy is calculated according to the original gray scale of the pixel and the display time (equal to the sum of the first display time and the second display time), and the sum of the first energy and the second energy is equal to the third energy. The value of the second display data can then be obtained by calculating the energy.
In order to ensure the display effect, the refresh times of the first display data and the second display data are the same, that is, the display time is selected to be the same. In order to ensure the display effect, the refreshing time of the pixel is increased to twice of the original refreshing time, wherein half of the refreshing time is used for refreshing the first display data, and the other half of the refreshing time is used for refreshing the second display data. At this time, the refreshing frequency of the actual display picture is the same as the original frequency, so as to ensure the display effect of the actual picture.
And S4, if the original gray scale of the pixel is not larger than the preset gray scale threshold value, displaying the gray scale display data corresponding to the original gray scale without mura reduction. Because the refreshing times of the pixels are increased to twice of the original refreshing times, the gray scale display data corresponding to the original gray scale is displayed in each refreshing, namely the same gray scale display data are pushed for 2 continuous frames and are all the gray scale display data corresponding to the original gray scale.
Aiming at the pixels with high gray scale, the brightness is high, and the corresponding data voltage value is small, so that the mura phenomenon is not obvious under the condition of high gray scale, and special processing is not needed, so that the operation amount of data can be greatly reduced only aiming at the pixels with obvious mura phenomenon of the pixels with low gray scale.
Example 2:
an embodiment of the present invention further provides a display device, configured to perform the method in embodiment 1, where a block diagram of the device is shown in fig. 2, and the device includes:
the acquisition unit 01 is used for acquiring the original gray scale of the current pixel;
and the judging unit 02 is used for judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value, and the preset gray scale threshold value is set according to the maximum brightness of the screen body and the size of the screen body.
And an adjusting output unit 03, configured to divide the original gray scale into first display data and second display data and sequentially display the first display data and the second display data if the original gray scale of the pixel is not greater than a preset gray scale threshold, where the first display data is black gray scale display data, and a sum of luminance of the first display data and the luminance of the second display data is equal to luminance of the original gray scale of the pixel.
And the normal output unit 04 is configured to display gray scale display data corresponding to the original gray scale if the original gray scale of the pixel is greater than a preset gray scale threshold.
Optionally, in the adjustment output unit, the refresh rate of the pixel is increased to twice the original refresh rate, wherein half of the refresh rate is used for refreshing the first display data, and the other half of the refresh rate is used for refreshing the second display data.
Optionally, the normal output unit includes an output subunit, and the grayscale display data corresponding to the grayscale is displayed in each refresh after the refresh frequency of the pixel is increased to twice the original refresh frequency.
The display device in this embodiment adopts an external compensation scheme, and adopts external equipment to collect scanning data of the whole module, and then calculates compensation data of different areas according to comparison of scanning results. Selectively performing black insertion treatment on the pixel points with the specific gray scale and below to reduce or eliminate the phenomenon of uneven transverse light emission of the low-gray-scale picture.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A display method, comprising the steps of:
acquiring an original gray scale of a current pixel;
judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value or not;
if the original gray scale of the pixel is not larger than a preset gray scale threshold value, dividing the original gray scale into first display data and second display data and displaying the first display data and the second display data in sequence, wherein the first display data are black gray scale display data, and the sum of the brightness of the first display data and the brightness of the second display data is equal to the brightness of the original gray scale of the pixel.
2. The method of claim 1, further comprising displaying gray scale display data corresponding to the original gray scale if the gray scale of the pixel is greater than a predetermined gray scale threshold.
3. The method of claim 1, wherein in the step of sequentially displaying the first display data and the second display data, the number of times of refreshing the pixels is increased to twice the original number of times, wherein half of the number of times is used for refreshing the first display data and the other half of the number of times is used for refreshing the second display data.
4. The method according to claim 2, wherein in the step of displaying the gray scale display data corresponding to the original gray scale, the gray scale display data corresponding to the original gray scale is displayed for each refresh after the refresh rate of the pixel is increased to twice the original refresh rate.
5. The method according to any of claims 1-4, wherein the predetermined grayscale threshold is set according to the maximum brightness of the screen and the size of the screen.
6. A display device, comprising:
the acquisition unit is used for acquiring the original gray scale of the current pixel;
the judging unit is used for judging whether the original gray scale of the pixel is larger than a preset gray scale threshold value or not;
and the adjustment output unit is used for dividing the original gray scale into first display data and second display data and displaying the first display data and the second display data in sequence if the original gray scale of the pixel is not larger than a preset gray scale threshold, wherein the first display data is black gray scale display data, and the sum of the brightness of the first display data and the brightness of the second display data is equal to the brightness of the original gray scale of the pixel.
7. The apparatus of claim 6, further comprising a normal output unit configured to display gray scale display data corresponding to an original gray scale of the pixel if the original gray scale is greater than a preset gray scale threshold.
8. The apparatus of claim 6, wherein the output unit is adjusted to increase the number of refreshes of the pixel to twice the number of refreshes of the pixel, wherein half of the number is used to refresh the first display data and half of the number is used to refresh the second display data.
9. The apparatus of claim 7, wherein the normal output unit comprises an output subunit, and the gray scale display data corresponding to the original gray scale is displayed in each refresh after the refresh rate of the pixel is increased to twice the original refresh rate.
10. The apparatus of any one of claims 6-9, wherein the predetermined grayscale threshold is set according to a maximum brightness of the screen and a size of the screen.
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| CN114360437A (en) * | 2020-09-29 | 2022-04-15 | 京东方科技集团股份有限公司 | Display device, display control method and device and storage medium |
| CN112992065B (en) * | 2021-04-22 | 2022-04-15 | 昆山国显光电有限公司 | Brightness adjusting method and device for display panel and computer readable storage medium |
| CN117836841A (en) * | 2022-06-29 | 2024-04-05 | 京东方科技集团股份有限公司 | Display panel driving method and device, storage medium and display device |
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| JPH1091118A (en) * | 1996-09-11 | 1998-04-10 | Fujitsu General Ltd | Method of driving display device |
| CN101192386A (en) * | 2006-11-27 | 2008-06-04 | 联詠科技股份有限公司 | Method for driving LCD device and its related device |
| TW200923873A (en) * | 2007-11-26 | 2009-06-01 | Tpo Displays Corp | Image displaying system and method of elimitating mura defect |
| CN102110403B (en) * | 2009-12-23 | 2013-04-17 | 群康科技(深圳)有限公司 | Method for improving motion blur phenomenon of display and related display |
| CN105575367A (en) * | 2016-03-08 | 2016-05-11 | 京东方科技集团股份有限公司 | Display screen brightness adjusting method and system |
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