CN103390395A - Method and electronic equipment for adjusting brightness of display - Google Patents

Method and electronic equipment for adjusting brightness of display Download PDF

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Publication number
CN103390395A
CN103390395A CN2012101430756A CN201210143075A CN103390395A CN 103390395 A CN103390395 A CN 103390395A CN 2012101430756 A CN2012101430756 A CN 2012101430756A CN 201210143075 A CN201210143075 A CN 201210143075A CN 103390395 A CN103390395 A CN 103390395A
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gamma
gamma curve
display
application
brightness
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林楠
杨万丽
胡建锋
肖荣彬
张龙
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XIAMEN YIXIANG COMMUNICATION RESEARCH AND DEVELOPMENT CENTER Co Ltd
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XIAMEN YIXIANG COMMUNICATION RESEARCH AND DEVELOPMENT CENTER Co Ltd
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Priority to CN2012101430756A priority Critical patent/CN103390395A/en
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Abstract

The invention provides a method and electric equipment for adjusting brightness of a display. The display comprises pixels, each pixel is provided with a corresponding light source which has a Gamma value, and the Gamma values are in positive correlation with the brightness of the light sources. The method includes the steps that a standard Gamma curve for adjusting the brightness of the display is obtained; all application scenes of the display are obtained; in each application scene, the display is used for processing pictures needing displaying by the application scene, an application Gamma curve is set up for at least one application scene, and the application Gamma curve deviates from the standard Gamma curve. The gray scale brightness output by the display is adjusted by adjusting the Gamma curves according to the needs for processing pictures, input picture data can be analyzed without depending on a hardware circuit, the brightness output by the display can be matched with display content, and the better display effect is achieved.

Description

A kind of method and electronic equipment that the brightness of display is adjusted
Technical field
The present invention relates to display technique, refer to especially a kind of method and electronic equipment that the brightness of display is adjusted.
Background technology
That the screen of mobile terminal uses is GTG and three primary colors (RGB) Gamma that fixes, the Gamma value adopts curve to represent, the induction of expression eyes to light, in the process that different scenes shows, all adopt same Gamma curve to adjust GTG brightness, can not adjust according to scene changes.
Have the technology of dynamically adjusting Gamma now, need the image data that adopts the hardware circuit analysis to input, according to analysis result, adjust the Gamma curve, if the scene of application is different, different pictures needs different Gamma curves.
There are the following problems for prior art: in the technology of existing dynamically adjustment Gamma, analytical algorithm is upgraded difficulty, has increased production cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and electronic equipment that the brightness of display is adjusted, and is used for solving the existing technology of dynamically adjusting Gamma, and analytical algorithm is upgraded difficulty, has increased the defect of production cost.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of method that the brightness of display is adjusted, display comprises pixel, each described pixel has corresponding light source, light source has the Gamma value, and this Gamma is relevant to the gamma correction of light source, and continuous described Gamma value forms the Gamma curve; Method comprises: obtain the standard Gamma curve that the brightness of described display is adjusted; Obtain each application scenarios of described display, in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios; For at least one described application scenarios wherein, set up application Gamma curve, this application Gamma curve departs from described standard Gamma curve.
In described method, set up application Gamma curve and also comprise: during more than first threshold, the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve when the dark section of the picture of described application scenarios; During more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve when the highlights of the picture of described application scenarios.
In described method, also comprise: described display detected and be in the process that image processes; Obtain application Gamma curve corresponding to process of processing with described image, and, the required adjustment color value of process that described image is processed obtained; Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve; Adjust the brightness of described display according to described real-time Gamma value.
Described method, the brightness of adjusting described display according to described real-time Gamma value comprises: determine the GTG of described real-time Gamma value correspondence, described GTG represents by the darkest brightness to the stratum level of different brightness brightness; The brightness of adjusting described display according to described GTG reaches concrete brightness corresponding to described GTG.
In described method, described standard Gamma curve is specially the 2.2Gamma curve, and transverse axis is color value, and the longitudinal axis is the brightness of output.
In described method, set up application Gamma curve, also comprise:, for three sub-pixels of the red, green, blue in pixel, set up respectively red Gamma curve, green Gamma curve and blue Gamma curve.
A kind of electronic equipment, the display of electronic equipment comprises pixel, and each described pixel has corresponding light source, and light source has the Gamma value, and this Gamma is relevant to the gamma correction of light source, and continuous described Gamma value forms the Gamma curve; Also comprise: standard Gamma unit is used for obtaining the standard Gamma curve that the brightness of described display is adjusted; The application scenarios unit, for each application scenarios that obtains described display, in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios; The Gamma correcting unit,, at least one the described application scenarios for wherein, set up application Gamma curve, and this application Gamma curve departs from described standard Gamma curve.
Described electronic equipment, the Gamma correcting unit comprises: dark section correction module, the dark section when the picture of described application scenarios of being used for is during more than first threshold, and the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve; The highlights correction module, while being used for highlights when the picture of described application scenarios more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve.
Described electronic equipment, in the Gamma correcting unit, red Gamma curve module, be used for calling described dark section correction module and highlights correction module; Green Gamma curve module, be used for calling described dark section correction module and highlights correction module; Blue Gamma curve module, be used for calling described dark section correction module and highlights correction module.
Described electronic equipment also comprises: image detecting element detects described display and is in the process that image processes; Application Gamma curved unit, be used for obtaining application Gamma curve corresponding to process of processing with described image, and, obtain the required adjustment color value of process that described image is processed; Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve; The brightness adjustment unit, be used for adjusting according to described real-time Gamma value the brightness of described display.
The beneficial effect of technique scheme of the present invention is as follows: at display, process in the process of image, need to adjust by adjusting described Gamma curve the GTG brightness of display output according to what process image, no longer rely on the image data of hardware circuit analysis input, make the brightness of display output can adaptive displaying contents, obtain better display effect.
Description of drawings
Fig. 1 represents a kind of method flow schematic diagram that the brightness of display is adjusted;
What Fig. 2 represented real-time Gamma numerical value and standard Gamma curve concerns schematic diagram one;
What Fig. 3 represented real-time Gamma numerical value and standard Gamma curve concerns schematic diagram two.
Embodiment
, for making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
A point on the being seen display of eyes i.e. a pixel, formed by three sub-pixels of red, green, blue, each sub-pixel, its light source behind can show different brightness, namely, on screen, the brightness of each pixel changes, and is all to be brought by the gray scale variation of three sub-pixels of RGB that form pixel.GTG has represented that by the darkest brightness to different luminance level brightness, luminance level is more, and the picture that can present is just finer and smoother; Take the display pannel (Panel) of 8bit as example, can show 8 a powers luminance level of 2, be referred to as 256 GTGs.
In the technical parameter of display, contrast refers to the brightest numerical value divided by the most secretly obtaining, if want the complete highly real picture-no matter be the picture of high brightness or the picture of low-light level of showing, more than the contrast of display should reach 5000:1, and the contrast of display is generally 500 ~ 1000:1, therefore, adopt the adjustment of Gamma curve the brightest and the darkest between the variation of each luminance level.
About the Gamma value:
File Gamma, to a given digital photo, file Gamma is a definite value according to Specification, so need not its correction; If but for special requirement, the value of file Gamma that can conversion digital photo file.
The parameter Gamma of display, described the physical attribute of display, and parameter Gamma is changeless, and does not allow to be corrected; Parameter Gamma specifically refers to the distortion of the output image of display to input signal, also can refer to the concrete numerical value of this distortion.
System Gamma, after having read the photo digital document, a kind of conversion before outputing to display, for the windows system, system Gamma is present in video card, is adjustable, and is correctable.Want corrective system Gamma when using the processing digital photo, if display Gamma and file Gamma immobilize, at this moment, the Gamma trimming process is the system Gamma of correcting electronic equipment (computing machine), what make display Gamma, system Gamma, three conversion of file Gamma is superposed to 1.0, thereby make the image of display output the same with original scene, do not have distortion.
Input voltage produces brightness output on display, the Gamma curve is a suite line of reflection input voltage and output brightness relation.In black and white display, the Gamma curve determines the GTG brightness of procedure for displaying, and in color monitor, the trichromatic Gamma curve of RGB not only determines the GTG brightness of procedure for displaying, and affects the integral color of procedure for displaying.
The Gamma value is a kind of induction curves of eyes to light, has comprised physical quantity, physiology perception and psychological response.
Physical quantity adopts merely brill cd/ ㎡, and the physiology perception varies with each individual, and for example the people of the people of child, youth, a middle-aged person, the elderly, anomalous trichromatism or colour blindness sees that the portrait that forms in brain after same picture also can be different; The psychological response aspect, needs are considered the background luminance of environment.Eyes are nonlinear curves to the induction curve of light under normal circumstances, and to three kinds of luminophor RGB on display, also can induce respectively three kinds of different curves.
In the present invention, set different use scenes, for different use scenes is equipped with different Gamma curves.
The embodiment of the present invention provides a kind of method that the brightness of display is adjusted, as shown in Figure 1, display comprises pixel, each described pixel has corresponding light source, light source has the Gamma value, and this Gamma value is relevant to the gamma correction of light source, and continuous described Gamma value forms the Gamma curve; Method comprises:
Step 101, obtain the standard Gamma curve that the brightness of described display is adjusted;
Step 102, obtain each application scenarios of described display, and in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios;
Step 103,, at least one described application scenarios wherein, set up application Gamma curve, and this application Gamma curve departs from described standard Gamma curve.
The technical scheme that application provides, process in the process of image at display, need to adjust by adjusting described Gamma curve the GTG brightness of display output according to what process image, no longer rely on the image data of hardware circuit analysis input, make the brightness of display output can adaptive displaying contents, obtain better display effect.
The difference (stratum) that eyes can be differentiated is 1/100, in other words, can tell the topography of 99 candle lights or 101 candle lights in the picture of 100 candle lights, if but watch 1 candle power hour of dark picture-for example under dark environment, can tell the difference of 0.01 candle light this moment, that is, the 1 following ordinary person of candle light, can separate stratum more than 100.
In film, TV or game picture; often there will be moment to enter very dark picture from very bright picture; or the situation that enters very bright picture from very dark picture; the Gamma curve that set to be fit to can realize well the brightest and the darkest between the variation of each luminance level; make picture more fine and smooth soft, help the user to obtain the most real visual experience.
In a preferred embodiment, setting up application Gamma curve also comprises:
During more than first threshold, the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve when the dark section of the picture of described application scenarios;
During more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve when the highlights of the picture of described application scenarios.
First threshold in embodiment can be a relative concept with Second Threshold, determine in the following way: in the picture of application scenarios, determine the first ratio that dark section occupies, and the second ratio of occupying of definite highlights, when the first ratio is greater than or equal to the second ratio, just assert that dark section is more than first threshold;
Otherwise, in the picture of application scenarios, determine the first ratio that dark section occupies, and the second ratio of occupying of definite highlights, when the first ratio is less than or equal to the second ratio, just assert that highlights is more than Second Threshold.
As shown in Figure 2, standard Gamma curve is specially the 2.2Gamma curve, and transverse axis is color value, and the longitudinal axis is the brightness of output, and dark section and the highlights of the picture of described color value and described application scenarios have corresponding relation.Particularly, in fact the color value that transverse axis represents, color value have described dark section or the highlights of the picture of application scenarios, this be because, can determine the color of current picture according to color value,, if color is the dark colours such as black, grey or brown, show that this is dark section; Otherwise,, if color is the colors such as white, bright yellow, show that this is highlights.
According to color value and Gamma curve, can directly obtain corresponding brightness, and the brightness that obtains envisioning by the variation of controlling GTG.
In a preferred embodiment, also comprise:
Described display being detected is in the process that image processes;
Obtain application Gamma curve corresponding to process of processing with described image, and, the required adjustment color value of process that described image is processed obtained;
Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve;
Adjust the brightness of described display according to described real-time Gamma value.
The mode of obtaining corresponding Gamma curve can be divided into automatic acquisition and manually obtain;
In the process of automatic acquisition, not only to deposit standard Gamma curve in electronic equipment, and deposited some the Gamma curves that are applicable to different scenes, the concrete application that different Gamma curves can move with current electronic device is complementary.
Can also be divided into different types from the Gamma curve that different concrete application is complementary, comprise the Gamma coarse adjustment curve of only supporting Gamma is carried out coarse adjustment, the Gamma fine tuning curve of fine tuning is carried out in support to Gamma, and supports the consonance of Gamma being carried out coarse adjustment and fine tuning to transfer curve.For example, can provide child's user model, young user model, middle aged user model, old user model, anomalous trichromatism user model, and colour blindness user model.Wherein, because the function of child, youth and middle aged eyes is comparatively perfect, the brightness of the picture of application programs thereby comparatively responsive, Gamma fine tuning curve preferably is provided, in like manner,, for the colour blindness user model preferably provides Gamma coarse adjustment curve, for preferably providing consonance, the anomalous trichromatism user model transfers curve.
In the process of manually obtaining, choose different Gamma curves according to user's selection, particularly, can point out the user to choose different Gamma curves, can point out the user to select higher Gamma value under darker picture, with the level of sacrificial section highlights, obtain more dark section level;
Opposite, in some brighter pictures (for example outdoor scene are more), can point out the user to select lower Gamma value,, with the dark section level of sacrificial section, make highlights level-as cloud layer etc., seem more clearly demarcated.
In a preferred embodiment, the brightness of adjusting described display according to described real-time Gamma value comprises:
Determine the GTG that described real-time Gamma value is corresponding, described GTG represents by the darkest brightness to the stratum level of different brightness brightness;
The brightness of adjusting described display according to described GTG reaches concrete brightness corresponding to described GTG.
In an application scenarios, in the interface of taking pictures, wish to strengthen the brightness of dark place, if but the parameter of modification camera (camera), can cause the time shutter to lengthen or the noise increase, therefore the technology that provides is provided, revise Gamma numerical value, the brightness of the GTG that the dark place of enhancing picture is corresponding, to obtain more clear bright photo.
In an application scenarios, process in the process of inputting interface of black matrix wrongly written or mispronounced character at electronic equipment,, by reasonable disposition Gamma, enlarge the difference between white and black, color is shown clearly more demarcated.
Display carries out colour based on trichromatic principle and shows, each pixel, red, green, blue by different luminance levels combines, the different pixel of final formation, that is, on screen, the brightness of each pixel changes, all to be brought by the gray scale variation of three RGB sub-pixels that form this pixel, therefore for display, the Gamma curve that usually can design three kinds carrys out sub-pixel corresponding not of the same race respectively, to control the GTG of this sub pixel.
In a preferred embodiment, set up application Gamma curve, also comprise:
, for three sub-pixels of the red, green, blue in pixel, set up respectively red Gamma curve, green Gamma curve and blue Gamma curve.
The embodiment of the present invention provides a kind of electronic equipment, and the display of electronic equipment comprises pixel, and each described pixel has corresponding light source, and light source has the Gamma value, and this Gamma is relevant to the gamma correction of light source;
Also comprise:
Standard Gamma unit, be used for obtaining the standard Gamma curve that the brightness of described display is adjusted;
The application scenarios unit, for each application scenarios that obtains described display, in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios;
The Gamma correcting unit,, at least one the described application scenarios for wherein, set up application Gamma curve, and this application Gamma curve departs from described standard Gamma curve.
Standard Gamma curve is specially the 2.2Gamma curve, and transverse axis is color value, and the longitudinal axis is the brightness of output.
In a preferred embodiment, the Gamma correcting unit comprises:
Dark section correction module, the dark section when the picture of described application scenarios of being used for is during more than first threshold, and the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve;
The highlights correction module, while being used for highlights when the picture of described application scenarios more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve.
In a preferred embodiment, in the Gamma correcting unit,
Red Gamma curve module, be used for calling described dark section correction module and highlights correction module;
Green Gamma curve module, be used for calling described dark section correction module and highlights correction module;
Blue Gamma curve module, be used for calling described dark section correction module and highlights correction module.
In a preferred embodiment, also comprise:
Image detecting element, detect described display and be in the process that image processes;
Application Gamma curved unit, be used for obtaining application Gamma curve corresponding to process of processing with described image, and, obtain the required adjustment color value of process that described image is processed;
Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve;
The brightness adjustment unit, be used for adjusting according to described real-time Gamma value the brightness of described display.
Adopt this programme advantage afterwards to be: at display, to process in the process of image, need to adjust by adjusting described Gamma curve the GTG brightness of display output according to what process image, no longer rely on the image data of hardware circuit analysis input, make the brightness of display output can adaptive displaying contents, obtain better display effect.
The above is the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. the method that the brightness of display is adjusted, is characterized in that, described display comprises pixel, each described pixel has corresponding light source, light source has the Gamma value, and this Gamma value is relevant to the gamma correction of light source, and continuous described Gamma value forms the Gamma curve;
Method comprises:
Obtain the standard Gamma curve that the brightness of described display is adjusted;
Obtain each application scenarios of described display, in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios;
For at least one described application scenarios wherein, set up application Gamma curve, this application Gamma curve departs from described standard Gamma curve.
2. method according to claim 1, is characterized in that, sets up application Gamma curve and comprise:
During more than first threshold, the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve when the dark section of the picture of described application scenarios;
During more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve when the highlights of the picture of described application scenarios.
3. method according to claim 1, is characterized in that,
Described standard Gamma curve is specially the 2.2Gamma curve, and transverse axis is color value, and the longitudinal axis is the brightness of output; Dark section and the highlights of the picture of described color value and described application scenarios have corresponding relation.
4. method according to claim 3, is characterized in that, also comprises:
Detect in the process that described display is in the display application scene;
Obtain the application Gamma curve corresponding with the process of described display application scene, and, the required adjustment color value of process of described display application scene obtained;
Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve;
Adjust the brightness of described display according to described real-time Gamma value.
5. method according to claim 4, is characterized in that, the brightness of adjusting described display according to described real-time Gamma value comprises:
Determine the GTG that described real-time Gamma value is corresponding, wherein, described GTG represents by the darkest brightness to the stratum level of different brightness brightness;
The brightness of adjusting described display according to described GTG reaches concrete brightness corresponding to described GTG.
6. method according to claim 1, is characterized in that, sets up application Gamma curve, also comprises:
, for three sub-pixels of the red, green, blue in pixel, set up respectively red Gamma curve, green Gamma curve and blue Gamma curve.
7. an electronic equipment, is characterized in that, the display of electronic equipment comprises pixel, and each described pixel has corresponding light source, and light source has the Gamma value, and this Gamma is relevant to the gamma correction of light source, and continuous described Gamma value forms the Gamma curve;
Also comprise:
Standard Gamma unit, be used for obtaining the standard Gamma curve that the brightness of described display is adjusted;
The application scenarios unit, for each application scenarios that obtains described display, in each described application scenarios, described display is for the treatment of the picture of the required displaying of this application scenarios;
The Gamma correcting unit,, at least one the described application scenarios for wherein, set up application Gamma curve, and this application Gamma curve departs from described standard Gamma curve.
8. electronic equipment according to claim 7, is characterized in that, the Gamma correcting unit comprises:
Dark section correction module, the dark section when the picture of described application scenarios of being used for is during more than first threshold, and the real-time Gamma value of described application Gamma curve should be greater than the benchmark Gamma value of described standard Gamma curve;
The highlights correction module, while being used for highlights when the picture of described application scenarios more than Second Threshold, the real-time Gamma value of described application Gamma curve should be less than the benchmark Gamma value of described standard Gamma curve.
9. electronic equipment according to claim 8, is characterized in that, described Gamma correcting unit comprises:
Red Gamma curve module, be used for calling described dark section correction module and highlights correction module;
Green Gamma curve module, be used for calling described dark section correction module and highlights correction module;
Blue Gamma curve module, be used for calling described dark section correction module and highlights correction module.
10. electronic equipment according to claim 7, is characterized in that, also comprises:
Image detecting element, detect described display and be in the process that image processes;
Application Gamma curved unit, be used for obtaining application Gamma curve corresponding to process of processing with described image, and, obtain the required adjustment color value of process that described image is processed;
Obtain real-time Gamma value according to described adjustment color value on described application Gamma curve;
The brightness adjustment unit, be used for adjusting according to described real-time Gamma value the brightness of described display.
CN2012101430756A 2012-05-09 2012-05-09 Method and electronic equipment for adjusting brightness of display Pending CN103390395A (en)

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