CN103617776B - Brightness of display screen uniformity adjusting method and system - Google Patents
Brightness of display screen uniformity adjusting method and system Download PDFInfo
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- CN103617776B CN103617776B CN201310618281.2A CN201310618281A CN103617776B CN 103617776 B CN103617776 B CN 103617776B CN 201310618281 A CN201310618281 A CN 201310618281A CN 103617776 B CN103617776 B CN 103617776B
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Abstract
A kind of brightness of display screen uniformity adjusting method and system, wherein method comprises step: display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region; Obtain the average brightness of each viewing area, determine the minimum brightness mean value in described average brightness, minimum average B configuration brightness value is set to desired value; Calculate the compensating parameter of each viewing area to be adjusted according to described average brightness and described desired value, wherein, described viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area; Obtain the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulate the transmittance of dimming glass according to each described printing opacity parameter.Brightness of display screen homogeneity is improve by the present invention program.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of brightness of display screen uniformity adjusting method and system.
Background technology
At present, because the screen intensity of display screen is uneven, often there is dark side dark angle phenomenon when screen display.Such as LCD display.LCD increases along with size, and the bad visual effects such as its dark angle of dark side are more and more obvious.At present, when 46 cun of LCD display are dispatched from the factory, brightness uniformity major part is below 85%.Human eye can see the bad visual effect problems such as the dark angle of LCD dark side easily.When dark side dark angle phenomenon is obvious, the display effect of screen can be affected.Therefore, adjust screen intensity homogeneity and seem more and more important.
The existing scheme improving brightness of display screen homogeneity has two kinds: a kind of is light-source brightness homogeneity in adjustment equipment; Another kind is gain by revising display and biased, carrys out compensate for brightness homogeneity.
For such scheme one: the homogeneity of light source is determined by backing structure and backlight scheme, changes its luminosity by the supply voltage or electric current revising local back light source.Finally carry out compensate for brightness homogeneity.This scheme works is poor, and panel producer does not provide basic circuit interface.For such scheme two: by revising the gain of display and being biased, carry out compensate for brightness homogeneity.This scheme will cause signal GTG to reduce, and loss image detail, color excessively has some setbacks, slight distortion.
In sum, above-mentioned existing brightness of display screen homogeneity adjustment technology, can not solve the problem of screen intensity lack of homogeneity better.
Summary of the invention
Based on this, be necessary the problem for screen intensity lack of homogeneity, a kind of brightness of display screen uniformity adjusting method and system are provided.
A kind of brightness of display screen uniformity adjusting method, comprises step:
Display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
Obtain the average brightness of each viewing area, determine the minimum brightness mean value in described average brightness, minimum average B configuration brightness value is set to desired value;
Calculate the compensating parameter of each viewing area to be adjusted according to described average brightness and described desired value, wherein, described viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Obtain the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulate the transmittance of dimming glass according to each described printing opacity parameter.
A kind of brightness of display screen homogeneity adjustment System, comprising:
First area divides module, for display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
Average brightness determination module, for obtaining the average brightness of each viewing area;
Desired value determination module, for determining the minimum brightness mean value in described average brightness, is set to desired value by minimum average B configuration brightness value;
Compensating parameter determination module, for calculating the compensating parameter of each viewing area to be adjusted according to described average brightness and described desired value, wherein, described viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Transmittance adjustment module, for obtaining the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulates the transmittance of dimming glass according to each described printing opacity parameter.
Above-mentioned brightness of display screen uniformity adjusting method and system, by arranging dimming glass before display screen, and by display screen and dimming glass zoning respectively, calculate the compensating parameter of each viewing area to be adjusted, then the printing opacity parameter in corresponding dimming glass region is obtained according to the compensating parameter of viewing area to be adjusted, regulate the transmittance of dimming glass according to each described printing opacity parameter, realize the adjustment of brightness of display screen homogeneity.What the present invention program regulated is dimming glass transmittance before display screen, and be the brightness uniformity changing display effect from entirety, namely the final display effect of direct compensation, improves brightness of display screen homogeneity, improve display effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of brightness of display screen uniformity adjusting method embodiment of the present invention;
Fig. 2 is the structural representation of brightness of display screen homogeneity adjustment System embodiment of the present invention.
Embodiment
Each embodiment below for brightness of display screen uniformity adjusting method of the present invention and system is described in detail.
As shown in Figure 1, be the schematic flow sheet of brightness of display screen uniformity adjusting method embodiment of the present invention, comprise step:
Step S101: display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
The present invention program tightly sticks one deck dimming glass in display screen surface, i.e. the glass of adjustable transmittance.Can by less for the Region dividing of dimming glass, transparency improves.Dimming glass can realize the switching of the transparent of glass with opaque state and the adjustment of transmittance by automatically controlled, temperature control, light-operated, voltage-controlled etc. various mode.
Can be, according to pixel distribution, display screen is on average divided into X*Y equal portions region by display screen zoning, also can be directly average division, such as be divided into X*X equal portions etc.The object of this programme zoning is the region in order to distinguish brightness irregularities, such as, and the dark angular zone of dark side.Therefore, the region of division is more, and the effect of adjustment is better.
Regulate the homogeneity of viewing area in this programme and realized by dimming glass, so must there be dimming glass region corresponding viewing area, dimming glass is carried out zoning by the region that therefore corresponding display screen divides.Certainly, in same screen, one piece of dimming glass can be only had, zoning be carried out in the region that corresponding for dimming glass display screen divides, realizes the adjustment of corresponding viewing area homogeneity.Such as display screen is divided into X*Y equal portions viewing area, and the dimming glass onesize with display screen is divided into X*Y equal portions dimming glass region by so corresponding viewing area.As another kind of implementation, also by several pieces of dimming glass splicings, the division to dimming glass can be realized.Such as display screen is divided into X*Y equal portions viewing area, so can be spliced by the dimming glass of X*Y block corresponding viewing area size, realize the adjustment to reply display screen homogeneity.Certainly, one piece of dimming glass also can be responsible for multiple viewing area.When being (such as combination) when multiple display screen, the adjustment of polylith dimming glass realization to multiple display screen can be had.
Step S102: the average brightness obtaining each viewing area, determines the minimum brightness mean value in average brightness, minimum average B configuration brightness value is set to desired value;
Wherein, regional luminance mean value refers to the mean value of brightness in this region, can gather the brightness value of all pixels in this region, then average.Also can gather the several brightness values representing pixel in this region, then average, obtain average brightness.
The average brightness obtaining each viewing area can be realized by multimetering mode, but this mode expends time in long, and efficiency is low.
As wherein a kind of optimal way, obtain the average brightness step of each viewing area, comprising:
A1: the picture obtaining the complete white display frame of display screen of shooting;
Display screen is adjusted to the complete white picture of display, after being taken pictures by filming apparatus, obtains picture.
A2: picture correspondence is divided into multiple picture region according to the viewing area that display screen divides;
A3: obtain the initial average brightness value in each picture region according to picture;
Improve the brightness of brightness uniformity sexual needs multi-point sampler, test point quantity is more much more accurate.Obtain initial average brightness value by the form of taking pictures, improve treatment effeciency greatly.
A4: the initial average brightness value in each picture region is multiplied with corresponding image correction parameters, obtains the average brightness value of each viewing area.
Image correction parameters is exactly the correction parameter between the photo that draws of filming apparatus and actual conditions.Each region correspondence has an image correction parameters, is multiplied by initial average brightness value with corresponding image correction parameters, can obtain the average brightness value that viewing area is real.
Step S103: the compensating parameter calculating each viewing area to be adjusted according to average brightness and desired value, wherein, viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Be regulated toward the low pixel of brightness value by pixel high for brightness value owing to realizing brightness uniformity, therefore, the region that brightness value is low need not regulate, and the high region of brightness value is only viewing area to be adjusted.Certainly, be the transmittance of acquiescence dimming glass itself when being 100% here, the higher region of brightness value is only viewing area to be adjusted.When the transmittance of dimming glass is not 100%, the dimming glass region corresponding to the viewing area that brightness value is low is still needed to regulate.
The compensating parameter method calculating viewing area to be adjusted has a variety of, and this enforcement is enumerated wherein a kind of mode and is described.
Calculate the compensating parameter step of each viewing area to be adjusted according to average brightness and desired value, comprising: by being divided by of the average brightness of desired value and viewing area to be adjusted, obtain the compensating parameter of corresponding viewing area to be adjusted.
The compensating parameter calculated in this way, can realize region high for brightness value to regulate toward the region that brightness value is low.
Wherein in an embodiment, the step judging whether to need to carry out uniformity compensation can also be had, such as, calculate the compensating parameter step of each viewing area to be adjusted according to average brightness and desired value, comprising:
Judge whether the ratio of high-high brightness mean value in desired value and average brightness is more than or equal to goal-selling threshold value;
If not, by being divided by of the average brightness of desired value and viewing area to be adjusted, the compensating parameter of corresponding viewing area to be adjusted is obtained.
By judging to realize the display screen being less than goal-selling threshold value to adjust, until when ratio is more than or equal to targets threshold, stop the adjustment to brightness of display screen homogeneity.
Step S104: the printing opacity parameter obtaining corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulates the transmittance of dimming glass according to each printing opacity parameter.Here the transmittance of dimming glass is regulated to refer to the transmittance regulating corresponding dimming glass region according to each printing opacity parameter according to each printing opacity parameter.
Dimming glass can be electronic control type dimming glass, temperature control type dimming glass, light-operated dimming glass, voltage-controlled type dimming glass etc.The present embodiment is illustrated with electronic control type dimming glass.
Dimming glass is electronic control type dimming glass;
Regulate the transmittance step of dimming glass according to each printing opacity parameter, comprising:
The magnitude of voltage in corresponding dimming glass region is determined according to printing opacity parameter;
The transmittance of electronic control type dimming glass is regulated according to magnitude of voltage.
Realized the adjustment of dimming glass transmittance by automatically controlled mode, efficiency is high, and accuracy is good.
Wherein in an embodiment, display screen is DLP display screen, LED display, PDP display screen or OLED display screen.
Wherein in an embodiment, after realizing a brightness uniformity adjustment, again obtain average brightness, minimum brightness mean value and high-high brightness mean value are divided by, when being more than or equal to targets threshold, without the need to continuing adjustment, when not meeting, continue adjustment, namely continue to repeat step S102 to S104, until meet the demands.
What the present invention program regulated is dimming glass transmittance before display screen, and be the brightness uniformity changing display effect from entirety, namely the final display effect of direct compensation, improves brightness of display screen homogeneity.Such as, LCD display comprises backlight and liquid crystal panel, and backlight comprises light emitting source, light guide plate, reflector plate, diffusion sheet, brightness enhancement film etc., liquid crystal panel polaroid, liquid crystal cell etc.Light source is a part of vitals of LCD device, and namely the homogeneity of LCD light source is not equal to LCD brightness show uniformity.And this programme not only considers light source, also considering can light guide plate, reflector plate ... the uneven effect that the parts such as liquid crystal cell cause, thus improves brightness uniformity, improves display effect, makes the brightness uniformity of display screen better.
Each embodiment in this programme can independent assortment, such as electronic control type dimming glass can with specifically how parameter combinations be repaid in supplement, specifically how to ask compensating parameter and determining step can obtain average brightness with employing form of taking pictures to carry out combining etc., concrete combination will not enumerate.
Understand this programme in order to clearer, lift one of them concrete utilization example and be described:
Tightly stick one deck dimming glass in display screen surface, the complete white picture of display screen display, obtain display frame by the complete white picture of shooting of taking pictures;
Display frame is divided into 3 regions, so n=3.
Obtain the average brightness of three pictures, such as A1=100, A2=95, A3=90.The corrected parameter of regional is respectively: (wherein, Cn is the corrected parameter that filming apparatus is fixed for C1=0.95, C2=1, C3=0.9.)
Can obtain the average brightness value of viewing area: B1=95, B2=95, B3=81, now brightness uniformity Buni=81/95=85%, hypothetical target threshold value is set to 95%.Due to 85% < 95%, do not meet the demands, need adjustment glass transmission rate to compensate.
Thus can show that the region that B1 and B2 is corresponding is viewing area to be adjusted.By being divided by of the average brightness of desired value 81 and viewing area to be adjusted, obtain the compensating parameter of corresponding viewing area to be adjusted: E1=81/95=85%, E2=81/95=85%, E3=81/81=100%.
The glass transmission rate adjusting the 1st piece of region is 85%, second piece of region be the 85%, three piece of region is 100%, after having adjusted, B1 '=B1*E1=80.8; B2 '=B2*E2=80.8; B3 '=B3*E3=81;
Brightness uniformity Buni=Min (Bn ')/Bn '=99.7% meets targets threshold (95%), then without the need to continuing adjustment.
According to said method, the present invention also provides a kind of brightness of display screen homogeneity adjustment System, as shown in Figure 2, is the structural representation of brightness of display screen homogeneity adjustment System embodiment of the present invention, comprises:
First area divides module 210, for display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
Average brightness determination module 220, for obtaining the average brightness of each viewing area;
Desired value determination module 230, for determining the minimum brightness mean value in average brightness, is set to desired value by minimum average B configuration brightness value;
Compensating parameter determination module 240, for calculating the compensating parameter of each viewing area to be adjusted according to average brightness and desired value, wherein, viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Transmittance adjustment module 250, for obtaining the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulates the transmittance of dimming glass according to each printing opacity parameter.
Wherein in an embodiment, dimming glass is electronic control type dimming glass;
Transmittance adjustment module comprises:
Printing opacity parameter determination module, for obtaining the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted;
Magnitude of voltage determination module, for determining the magnitude of voltage in corresponding dimming glass region according to printing opacity parameter;
Sub-transmittance adjustment module, for regulating the transmittance of electronic control type dimming glass according to magnitude of voltage.
Wherein in an embodiment, compensating parameter determination module comprises:
Judge module, for judging whether the ratio of high-high brightness mean value in desired value and average brightness is more than or equal to goal-selling threshold value;
Sub-compensating parameter determination module, during for being less than goal-selling threshold value when ratio, by being divided by of the average brightness of desired value and viewing area to be adjusted, obtains the compensating parameter of corresponding viewing area to be adjusted.
Wherein in an embodiment, average brightness determination module comprises:
Picture acquisition module, the picture of the complete white display frame of the display screen for obtaining shooting;
Second area divides module, for the viewing area divided according to display screen, picture correspondence is divided into multiple picture region;
Initial average brightness value determination module, for obtaining the initial average brightness value in each picture region according to picture;
Sub-average brightness value determination module, for being multiplied with corresponding image correction parameters by the initial average brightness value in each picture region, obtains the average brightness value of each viewing area.
Wherein in an embodiment, display screen is DLP display screen, LED display, PDP display screen or OLED display screen.
Each embodiment can independent assortment, will not enumerate at this.
Brightness of display screen homogeneity adjustment System of the present invention and brightness of display screen uniformity adjusting method of the present invention are one to one, correlation technique feature in above-mentioned brightness of display screen uniformity adjusting method embodiment and technique effect thereof are all applicable to, in brightness of display screen homogeneity adjustment System embodiment, not repeat them here.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a brightness of display screen uniformity adjusting method, is characterized in that, comprises step:
Display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
Obtain the average brightness of each viewing area, determine the minimum brightness mean value in described average brightness, minimum average B configuration brightness value is set to desired value;
Calculate the compensating parameter of each viewing area to be adjusted according to described average brightness and described desired value, wherein, described viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Obtain the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulate the transmittance of dimming glass according to each described printing opacity parameter.
2. brightness of display screen uniformity adjusting method according to claim 1, is characterized in that, described dimming glass is electronic control type dimming glass;
The described transmittance step regulating dimming glass according to each described printing opacity parameter, comprising:
The magnitude of voltage in corresponding dimming glass region is determined according to described printing opacity parameter;
The transmittance of electronic control type dimming glass is regulated according to described magnitude of voltage.
3. brightness of display screen uniformity adjusting method according to claim 1 and 2, is characterized in that, the described compensating parameter step calculating each viewing area to be adjusted according to described average brightness and described desired value, comprising:
Judge whether the ratio of high-high brightness mean value in described desired value and described average brightness is more than or equal to goal-selling threshold value;
If not, the average brightness of desired value and viewing area to be adjusted is divided by, obtains the compensating parameter of corresponding viewing area to be adjusted.
4. brightness of display screen uniformity adjusting method according to claim 1 and 2, is characterized in that, the average brightness step of each viewing area of described acquisition, comprising:
Obtain the picture of the complete white display frame of display screen of shooting;
According to the viewing area that described display screen divides, described picture correspondence is divided into multiple picture region;
The initial average brightness value in each picture region is obtained according to described picture;
Be multiplied with corresponding image correction parameters by initial average brightness value in each picture region, obtain the average brightness value of each viewing area, wherein, described image correction parameters refers to the correction parameter between the photo that filming apparatus draws and actual conditions.
5. brightness of display screen uniformity adjusting method according to claim 1 and 2, is characterized in that, described display screen is DLP display screen, LED display, PDP display screen or OLED display screen.
6. a brightness of display screen homogeneity adjustment System, is characterized in that, comprising:
First area divides module, for display screen to be adjusted and the dimming glass be located at before it are divided into multiple viewing area and dimming glass region;
Average brightness determination module, for obtaining the average brightness of each viewing area;
Desired value determination module, for determining the minimum brightness mean value in described average brightness, is set to desired value by minimum average B configuration brightness value;
Compensating parameter determination module, for calculating the compensating parameter of each viewing area to be adjusted according to described average brightness and described desired value, wherein, described viewing area to be adjusted refers to other viewing area except the corresponding viewing area of minimum brightness mean value in each viewing area;
Transmittance adjustment module, for obtaining the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted, regulates the transmittance of dimming glass according to each described printing opacity parameter.
7. brightness of display screen homogeneity adjustment System according to claim 6, is characterized in that, described dimming glass is electronic control type dimming glass;
Described transmittance adjustment module comprises:
Printing opacity parameter determination module, for obtaining the printing opacity parameter in corresponding dimming glass region according to the compensating parameter of viewing area to be adjusted;
Magnitude of voltage determination module, for determining the magnitude of voltage in corresponding dimming glass region according to described printing opacity parameter;
Sub-transmittance adjustment module, for regulating the transmittance of electronic control type dimming glass according to described magnitude of voltage.
8. the brightness of display screen homogeneity adjustment System according to claim 6 or 7, is characterized in that, described compensating parameter determination module comprises:
Judge module, for judging whether the ratio of high-high brightness mean value in described desired value and described average brightness is more than or equal to goal-selling threshold value;
Sub-compensating parameter determination module, for when described ratio is less than goal-selling threshold value, is divided by the average brightness of described desired value and viewing area to be adjusted, obtains the compensating parameter of corresponding viewing area to be adjusted.
9. the brightness of display screen homogeneity adjustment System according to claim 6 or 7, is characterized in that, described average brightness determination module comprises:
Picture acquisition module, the picture of the complete white display frame of the display screen for obtaining shooting;
Second area divides module, for the viewing area divided according to described display screen, described picture correspondence is divided into multiple picture region;
Initial average brightness value determination module, for obtaining the initial average brightness value in each picture region according to described picture;
Sub-average brightness value determination module, for the initial average brightness value in each picture region is multiplied with corresponding image correction parameters, obtain the average brightness value of each viewing area, wherein, described image correction parameters refers to the correction parameter between the photo that filming apparatus draws and actual conditions.
10. the brightness of display screen homogeneity adjustment System according to claim 6 or 7, is characterized in that, described display screen is DLP display screen, LED display, PDP display screen or OLED display screen.
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| JP2007294170A (en) * | 2006-04-24 | 2007-11-08 | Fujifilm Corp | Transmittance adjusting body unit, flat lighting system and liquid crystal display device using it |
| WO2011121630A1 (en) * | 2010-03-29 | 2011-10-06 | Ｎｅｃディスプレイソリューションズ株式会社 | Correction method and display device |
| CN102280097A (en) * | 2011-08-31 | 2011-12-14 | 广东威创视讯科技股份有限公司 | Display brightness and chrominance uniformity regulating method |
| CN103278959A (en) * | 2013-06-04 | 2013-09-04 | 南京晶多新材料科技有限公司 | Strain liquid crystal multifunctional dimming glass, and manufacturing method and application for strain liquid crystal multifunctional dimming glass |
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| JP2007003805A (en) * | 2005-06-23 | 2007-01-11 | Hitachi Displays Ltd | Illumination device and display apparatus with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294170A (en) * | 2006-04-24 | 2007-11-08 | Fujifilm Corp | Transmittance adjusting body unit, flat lighting system and liquid crystal display device using it |
| WO2011121630A1 (en) * | 2010-03-29 | 2011-10-06 | Ｎｅｃディスプレイソリューションズ株式会社 | Correction method and display device |
| CN102280097A (en) * | 2011-08-31 | 2011-12-14 | 广东威创视讯科技股份有限公司 | Display brightness and chrominance uniformity regulating method |
| CN103278959A (en) * | 2013-06-04 | 2013-09-04 | 南京晶多新材料科技有限公司 | Strain liquid crystal multifunctional dimming glass, and manufacturing method and application for strain liquid crystal multifunctional dimming glass |
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