CN108932936A - The adjusting method and display device of gray-scale intensity - Google Patents
The adjusting method and display device of gray-scale intensity Download PDFInfo
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- CN108932936A CN108932936A CN201811049297.5A CN201811049297A CN108932936A CN 108932936 A CN108932936 A CN 108932936A CN 201811049297 A CN201811049297 A CN 201811049297A CN 108932936 A CN108932936 A CN 108932936A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The present invention provides the adjusting method and display device of a kind of gray-scale intensity, and the adjusting method of the gray-scale intensity is comprising steps of obtain the corresponding tristimulus values of environment light source；The tristimulus values of the environment light source is converted into RGB grayscale value；Dynamic adjustment is carried out to the input grayscale value of display device according to RGB grayscale value and the ratio of maximum gray value, the output grayscale value of display device is obtained, to avoid presenting and the uncoordinated phenomenon of environment colour temperature while realizing the display colour temperature of automatic adjustment display device.
Description
Technical field
The present invention relates to gray-scale intensity regulation technology field more particularly to the adjusting methods and display dress of a kind of gray-scale intensity
It sets.
Background technique
The display picture of display device is made of multiple pixels, each pixel includes three sub- pictures of red, green, blue again
Element, luminance information, that is, RGB grayscale value by inputting three sub-pixels can control each sub-pixel luminence, pass through three sons
The mixing of pixel can be so that different color and brightness be presented in each pixel.
The colour temperature of environment light source and the display colour temperature of display device directly affect the experience of viewer.Existing colour temperature adjustment
Mode generally comprises two kinds, and one is viewers manually to adjust the display colour temperature of display device according to the use feeling of itself
It is whole, the range of this method of adjustment it is smaller and adjustment precision it is lower；Another is adjusted according to the brightness of environment light source
The display colour temperature of display device, for example, when environment light source is warm colour lamp, if the display effect of display device is high color temperature, then
Viewer easily experience picture it is partially bright and display color it is partially blue；Conversely, when environment light source is cool white lamp, as display effect is
Ground colour temperature, then viewer easily experiences that picture is partially dark and display color is partially red；It can both present uncoordinated with environment colour temperature
The phenomenon that.
Summary of the invention
To solve the above-mentioned problems, the present invention provides the regulating system and display device of a kind of gray-scale intensity, being capable of basis
The display colour temperature of the colour temperature dynamic regulation display device of environment light source, to realize colour temperature automatic adjustment and will not present and environment
The uncoordinated phenomenon of colour temperature.
It is proposed by the present invention the specific technical proposal is: provide a kind of adjusting method of gray-scale intensity, the adjusting method packet
Include step:
Obtain the corresponding tristimulus values (X, Y, Z) of environment light source；
The tristimulus values (X, Y, Z) of the environment light source is converted into RGB grayscale value (R, G, B)；
According to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value (R of display devicein,
Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
Further, the corresponding tristimulus values of environment light source is obtained to specifically include:
Obtain the colour temperature of environment light source；
The brightness L of the environment light source is obtained according to the colour temperature of the environment light sourcevAnd corresponding coloration (x, y)；
According to the brightness Lv, coloration (x, y) calculate the corresponding tristimulus values (X, Y, Z) of environment light source.
Further, the colour temperature for obtaining environment light source specifically includes: successively obtaining environment light according to the preset time cycle
The colour temperature in source or the colour temperature that environment light source is successively obtained according to preset color temperature change threshold value.
Further, according to the brightness Lv, coloration (x, y) calculate environment light source tristimulus values used by formula
Are as follows:
Further, before obtaining the corresponding tristimulus values of environment light source, the adjusting method further include:
Obtain the tristimulus values (X of black picture0,Y0,Z0)；
Obtain tristimulus values (X of the red picture under maximum gray valueR,YR,ZR)；
Obtain tristimulus values (X of the green picture under maximum gray valueG,YG,ZG)；
Obtain tristimulus values (X of the blue picture under maximum gray valueB,YB,ZB)。
Further, the tristimulus values (X, Y, Z) of the environment light source is converted into RGB grayscale value (R, G, B) step tool
Body includes:
The tristimulus values (X, Y, Z) of the environment light source is normalized, so that the colour gamut position after normalization
In in the colour gamut of the display device, normalization tristimulus values (X ', Y ', Z ') is obtained；
RGB grayscale value (R, G, B) is converted by the normalization tristimulus values (X ', Y ', Z ').
Further, the tristimulus values (X, Y, Z) of the environment light source is normalized, obtains three thorn of normalization
Swash formula used by value (X ', Y ', Z ') are as follows:
Further, it converts the normalization tristimulus values (X ', Y ', Z ') to used by RGB grayscale value (R, G, B)
Formula are as follows:
Wherein, γRIndicate the gamma value of red picture, γGIndicate the gamma value of green picture, γBIndicate blue picture
Gamma value.
Further, according to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input ash of display device
Rank value (Rin,Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout) used by formula
Are as follows:
The present invention also provides a kind of display device, the display device includes memory and processor, the memory
In be stored with a plurality of instruction, a plurality of instruction is suitable for being loaded and being executed by processor:
Obtain the corresponding tristimulus values (X, Y, Z) of environment light source；
The tristimulus values (X, Y, Z) of the environment light source is converted into RGB grayscale value (R, G, B)；
According to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value (R of display devicein,
Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
The adjusting method of gray-scale intensity proposed by the present invention passes through the tristimulus values for obtaining environment light source, by the environment light
The tristimulus values in source is converted to RGB grayscale value；Input further according to RGB grayscale value and the ratio of maximum gray value to display device
Grayscale value carries out dynamic adjustment, obtains the output grayscale value of display device, thus in the display for realizing automatic adjustment display device
It avoids presenting and environment colour temperature uncoordinated phenomenon while colour temperature.
Detailed description of the invention
With reference to the accompanying drawing, by the way that detailed description of specific embodiments of the present invention, technical solution of the present invention will be made
And other beneficial effects are apparent.
Fig. 1 is the flow chart of the adjusting method of gray-scale intensity；
Fig. 2 is the schematic diagram of the regulating system of gray-scale intensity；
Fig. 3 is the structural schematic diagram of memory and processor.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to detailed description of the present invention embodiment.However, it is possible to come in many different forms real
The present invention is applied, and the present invention should not be construed as limited to the specific embodiment illustrated here.On the contrary, providing these implementations
Example is in order to explain the principle of the present invention and its practical application, to make others skilled in the art it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.In the accompanying drawings, identical label will be used for table always
Show identical element.
Referring to Fig.1, the display device in the present embodiment includes multiple pixels, and each pixel includes red sub-pixel (R), green
Sub-pixels (G) and blue subpixels (B).The highest gray number of display device is n, wherein 0≤n≤255,0 expression are
The minimum gray scale of display device, 255 indicate be display device highest grayscale, when red sub-pixel (R), green sub-pixels
(G) and the grayscale value of blue subpixels (B) it is all 0 when, display device shows to be black, when red sub-pixel (R), green
The grayscale value of sub-pixels (G) and blue subpixels (B) it is all 255 when, display device shows to be white.In detail below
The adjusting method of gray-scale intensity is described comprising following steps:
S1, the corresponding tristimulus values (X, Y, Z) of environment light source is obtained；
S2, the tristimulus values (X, Y, Z) of environment light source is converted into RGB grayscale value (R, G, B)；
S3, according to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value of display device
(Rin,Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
Environment light source in the present embodiment refers to the headlamp in display device local environment.By obtaining environment light source
Tristimulus values, the tristimulus values of environment light source is converted into RGB grayscale value；Further according to RGB grayscale value and maximum gray value
Ratio carries out dynamic adjustment to the input grayscale value of display device, obtains the output grayscale value of display device, realizes automatic adjustment
The display colour temperature of display device, and be according to the tristimulus values of environment light source in the present embodiment come the display colour temperature to display device
It is adjusted rather than is adjusted according to the brightness of environment light source come the display colour temperature to display device, therefore, be can be avoided
It presents and the uncoordinated phenomenon of environment colour temperature.
Specifically, step S1 includes:
S11, the colour temperature for obtaining environment light source；
S12, the brightness L that environment light source is obtained according to the colour temperature of environment light sourcevAnd corresponding coloration (x, y)；
S13, according to brightness Lv, coloration (x, y) calculate the corresponding tristimulus values (X, Y, Z) of environment light source.
The colour temperature of environment light source can be measured by measuring instrument, each colour temperature can correspond to corresponding brightness LvAnd
Coloration (x, y) therefore obtains the brightness L that can determine environment light source after the colour temperature of environment light source according to colour temperaturevAnd coloration
(x,y).Then the corresponding tristimulus values of environment light source (X, Y, Z) is calculated further according to following formula:
Preferably, in step s 11, in order to avoid colour temperature of the too frequent to environment light source is detected, the present embodiment
In the colour temperature of environment light source, the i.e. measurement of the colour temperature of first time environment light source can be successively obtained according to preset period of time T
Moment is t, then measures again to the colour temperature of environment light source after interval time T, i.e., t+T, t+2T, t+3T ... the moment
It measures.It, will not while realizing and adjust in real time by successively obtaining the colour temperature of environment light source according to the preset time cycle
Generate apparent colour temperature switching phenomenon.
The colour temperature of environment light source can also be successively obtained according to preset color temperature change threshold value △ u in step s 11, i.e.,
The colour temperature of environment light source is u, then color temperature change again carries out the colour temperature of environment light source after reaching color temperature change threshold value △ u
Measurement, color temperature change here can be positive variation, is also possible to negative variation, it can in the colour temperature of environment light source be u+ △ u
Or measured when u- △ u, wherein according to preset temperature change threshold value successively obtain environment light source colour temperature it also will be understood that
For environment colour temperature variable quantity be proportional to environment light source colour temperature measurement frequency, i.e., the color temperature change amplitude of environment light source compared with
Greatly, then the number of the measurement of the colour temperature of environment light source increases, and the color temperature change amplitude of environment light source is smaller, then the color of environment light source
The number of the measurement of temperature reduces.By successively obtaining the colour temperature of environment light source according to preset color temperature change threshold value, realize real-time
Apparent colour temperature switching phenomenon will not be generated while adjusting, and environment light source is obtained according to preset color temperature change threshold value
Colour temperature can also determine whether to carry out colour temperature measurement according to the amplitude of variation of colour temperature, so that automatic adjustment is more intelligent.
Adjusting method before step S1, in the present embodiment further include:
S10, obtain display device black picture tristimulus values (X0,Y0,Z0)；Obtain the red picture of display device
Tristimulus values (X under maximum gray valueR,YR,ZR)；Obtain three thorns of the green picture of display device under maximum gray value
Swash value (XG,YG,ZG)；Obtain tristimulus values (X of the blue picture of display device under maximum gray valueB,YB,ZB).These ginsengs
Number can obtain when being tested for the property to display device, wherein the maximum gray of the display device in the present embodiment
It is 255, i.e. max=255, (XR,YR,ZR)、(XG,YG,ZG)、(XB,YB,ZB) it is all the tristimulus values under 255 grayscale.
Preferably, step S2 includes:
S21, the tristimulus values (X, Y, Z) of environment light source is normalized, acquisition normalization tristimulus values (X ',
Y′,Z′)；
S22, RGB grayscale value (R, G, B) is converted by normalization tristimulus values (X ', Y ', Z ').
In step s 2, the normalization coefficient of use is normalized to tristimulus values (X, Y, Z) no more than 1, makes
Colour gamut after must normalizing is pierced so that normalizing tristimulus values (X ', Y ', Z ') less than three without departing from the colour gamut of display device
Swash value (X, Y, Z), X≤X ', Y≤Y ', Z≤Z '.Here can the range of display colour gamut according to display device determine normalizing
Change coefficient, as long as enabling to the colour gamut after normalization without departing from the colour gamut of display device.Pass through three to environment light source
Values (X, Y, Z) is normalized, and obtains the effective grayscale value of maximum of display device, to avoid maximum effective grayscale
It is worth excessive and display colour gamut beyond display device or maximum effective grayscale value is smaller and reduce the display brightness of display device,
Promote the display effect of display device.
Specifically, in the step s 21, the tristimulus values of environment light source (X, Y, Z) is normalized, obtains normalizing
Change formula used by tristimulus values (X ', Y ', Z ') are as follows:
By the maximum value in tristimulus values (X, Y, Z) that tristimulus values (X, Y, Z) is normalized, so that three
Maximum value in values (X, Y, Z) is constant, other two tristimulus values accordingly reduce, for example, X=8, Y=10, Z=7, warp
After crossing normalized,Y '=10,
In step S22, convert normalization tristimulus values (X ', Y ', Z ') to used by RGB grayscale value (R, G, B)
Formula are as follows:
γ in above formulaRIndicate the gamma value of red picture, γGIndicate the gamma value of green picture, γBIndicate that blue is drawn
The gamma value in face.Wherein,What is indicated is red picture in maximum gray
Tristimulus values under value subtracts the tristimulus values of the tristimulus values, green picture of black picture under maximum gray value and subtracts black
The tristimulus values of the tristimulus values of picture and blue color picture under maximum gray value subtracts the tristimulus values of black picture
Inverse matrix.Since display device will appear light leakage phenomena when showing black picture, by three thorns for subtracting black picture
Sharp value can eliminate the influence of the light leakage in display device under black picture.
After obtaining RGB grayscale value (R, G, B), in step s3, according to formula:
Output grayscale value (the R of display device can be obtainedout,Gout,Bout)。
Referring to Fig. 2, the present embodiment additionally provides a kind of regulating system of gray-scale intensity, and the regulating system includes obtaining list
Member 1, converting unit 2 and adjustment unit 3.
Acquiring unit 1 is used for for obtaining the corresponding tristimulus values of environment light source (X, Y, Z), converting unit 2 by environment light
The tristimulus values (X, Y, Z) in source is converted to RGB grayscale value (R, G, B), adjustment unit 3 be used for according to RGB grayscale value (R, G, B) with
Input grayscale value (R of the ratio of maximum gray value max to display devicein,Gin,Bin) dynamic adjustment is carried out, obtain display device
Output grayscale value (Rout,Gout,Bout)。
Acquiring unit 1 in the present embodiment is specifically used for obtaining the colour temperature of environment light source, further according to the colour temperature of environment light source
Obtain the brightness L of environment light sourcevAnd corresponding coloration (x, y), finally according to brightness Lv, coloration (x, y) calculate environment light source pair
The tristimulus values (X, Y, Z) answered.
Converting unit 2 is specifically used for that the tristimulus values (X, Y, Z) of environment light source is normalized, and is normalized
Tristimulus values (X ', Y ', Z '), then RGB grayscale value (R, G, B) is converted by normalization tristimulus values (X ', Y ', Z ').
Referring to Fig. 3, the present embodiment additionally provides display device comprising memory 10 and processor 20.In memory 10
It is stored with a plurality of instruction, which is suitable for being loaded and being executed by processor 20:
Obtain the corresponding tristimulus values (X, Y, Z) of environment light source；
The tristimulus values (X, Y, Z) of environment light source is converted into RGB grayscale value (R, G, B)；
According to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value (R of display devicein,
Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (10)
1. a kind of adjusting method of gray-scale intensity, which is characterized in that the adjusting method comprising steps of
Obtain the corresponding tristimulus values (X, Y, Z) of environment light source；
The tristimulus values (X, Y, Z) of the environment light source is converted into RGB grayscale value (R, G, B)；
According to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value (R of display devicein,Gin,
Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
2. adjusting method according to claim 1, which is characterized in that obtain the corresponding tristimulus values of environment light source and specifically wrap
It includes:
Obtain the colour temperature of environment light source；
The brightness L of the environment light source is obtained according to the colour temperature of the environment light sourcevAnd corresponding coloration (x, y)；
According to the brightness Lv, coloration (x, y) calculate the corresponding tristimulus values (X, Y, Z) of environment light source.
3. adjusting method according to claim 2, which is characterized in that the colour temperature for obtaining environment light source specifically includes: according to
The preset time cycle successively obtains the colour temperature of environment light source or successively obtains environment light according to preset color temperature change threshold value
The colour temperature in source.
4. adjusting method according to claim 2, which is characterized in that according to the brightness Lv, coloration (x, y) calculate environment
Formula used by the tristimulus values of light source are as follows:
5. adjusting method according to claim 1, which is characterized in that obtain the corresponding tristimulus values of environment light source it
Before, the adjusting method further include:
Obtain the tristimulus values (X of black picture0,Y0,Z0)；
Obtain tristimulus values (X of the red picture under maximum gray valueR,YR,ZR)；
Obtain tristimulus values (X of the green picture under maximum gray valueG,YG,ZG)；
Obtain tristimulus values (X of the blue picture under maximum gray valueB,YB,ZB)。
6. adjusting method according to claim 5, which is characterized in that by the tristimulus values (X, Y, Z) of the environment light source
RGB grayscale value (R, G, B) step is converted to specifically include:
The tristimulus values (X, Y, Z) of the environment light source is normalized, so that the colour gamut after normalization is located at institute
It states in the colour gamut of display device, obtains normalization tristimulus values (X ', Y ', Z ')；
RGB grayscale value (R, G, B) is converted by the normalization tristimulus values (X ', Y ', Z ').
7. adjusting method according to claim 6, which is characterized in that the tristimulus values (X, Y, Z) of the environment light source
It is normalized, obtains formula used by normalization tristimulus values (X ', Y ', Z ') are as follows:
8. adjusting method according to claim 7, which is characterized in that turn the normalization tristimulus values (X ', Y ', Z ')
Turn to formula used by RGB grayscale value (R, G, B) are as follows:
Wherein, γRIndicate the gamma value of red picture, γGIndicate the gamma value of green picture, γBIndicate blue picture
Gamma value.
9. adjusting method according to claim 7, which is characterized in that according to RGB grayscale value (R, G, B) and maximum gray value
Input grayscale value (R of the ratio of max to display devicein,Gin,Bin) dynamic adjustment is carried out, obtain the output grayscale of display device
It is worth (Rout,Gout,Bout) used by formula are as follows:
10. a kind of display device, which is characterized in that the display device includes memory and processor, is deposited in the memory
A plurality of instruction is contained, a plurality of instruction is suitable for being loaded and being executed by processor:
Obtain the corresponding tristimulus values (X, Y, Z) of environment light source；
The tristimulus values (X, Y, Z) of the environment light source is converted into RGB grayscale value (R, G, B)；
According to the ratio of RGB grayscale value (R, G, B) and maximum gray value max to the input grayscale value (R of display devicein,Gin,
Bin) dynamic adjustment is carried out, obtain the output grayscale value (R of display deviceout,Gout,Bout)。
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| CN111312143A (en) * | 2020-02-28 | 2020-06-19 | 京东方科技集团股份有限公司 | Display device, driving method and driving device thereof, and computer-readable storage medium |
| CN111508450A (en) * | 2019-01-30 | 2020-08-07 | 北京小米移动软件有限公司 | Screen color conversion method and device, storage medium and electronic equipment |
| WO2023102996A1 (en) * | 2021-12-07 | 2023-06-15 | 惠州华星光电显示有限公司 | Display driving method, and display |
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