CN103617776A - Method and system for adjusting display screen luminance uniformity - Google Patents
Method and system for adjusting display screen luminance uniformity Download PDFInfo
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- CN103617776A CN103617776A CN201310618281.2A CN201310618281A CN103617776A CN 103617776 A CN103617776 A CN 103617776A CN 201310618281 A CN201310618281 A CN 201310618281A CN 103617776 A CN103617776 A CN 103617776A
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Abstract
Provided are a method and system for adjusting display screen luminance uniformity. The method comprises the steps that a display screen to be adjusted is divided into a plurality of display areas, and light adjusting glass arranged in front of the display screen is divided into a plurality of light adjusting glass areas; the luminance average value of each display area is obtained, the smallest luminance average value in the luminance average values is determined, and the smallest luminance average value is set as a target value; the compensating parameter of each display area to be adjusted is calculated according to the luminance average values and the target value, wherein the display areas to be adjusted are the display areas except for the display area corresponding to the smallest luminance average value; the light pervious parameters of the corresponding light adjusting glass areas are obtained according to the compensating parameters of the display areas to be adjusted, and the light transmittance of the light adjusting glass is adjusted according to the light pervious parameters. Through the scheme, the display screen luminance uniformity is improved.
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 inhomogeneous, tend to occur the dark angle of dark side phenomenon when screen display.Such as LCD display.LCD panel is along with size increases, and the bad visual effects such as its dark angle of dark side are more and more obvious.When at present, 46 cun of LCD display are dispatched from the factory, brightness uniformity major part is below 85%.Human eye can be seen the bad visual effect problems such as the dark angle of LCD dark side easily.When the dark angle of dark side phenomenon is obvious, can affect the display effect of screen.Therefore, adjust screen intensity homogeneity and seem more and more important.
The existing inhomogeneity scheme of brightness of display screen of improving has two kinds: a kind of is light-source brightness homogeneity in adjustment equipment; Another kind is by revising gain and the biasing of display, carrying out compensate for brightness homogeneity.
For such scheme one: the homogeneity of light source is determined by backing structure and backlight scheme, can change its luminosity by revising supply voltage or the electric current of local back light source.Finally carry out compensate for brightness homogeneity.The poor ，Qie panel of this scheme effect producer does not provide basic circuit interface.For such scheme two: by revising gain and the biasing of display, carry out compensate for brightness homogeneity.This scheme will cause signal GTG to reduce, loss image detail, and 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 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 a plurality of viewing areas 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 made as to desired value;
According to described average brightness and described desired value, calculate the compensating parameter of each viewing area to be adjusted, wherein, described viewing area to be adjusted refers in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
According to the compensating parameter of viewing area to be adjusted, obtain the printing opacity parameter in corresponding dimming glass region, according to printing opacity parameter described in each, regulate the transmittance of dimming glass.
A brightness of display screen homogeneity adjustment System, comprising:
Module is divided in first area, for display screen to be adjusted and the dimming glass be located at before it are divided into a plurality of viewing areas 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 of described average brightness, is made as 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 in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
Transmittance adjustment module, for obtain 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 printing opacity parameter described in each.
Above-mentioned brightness of display screen uniformity adjusting method and system, by dimming glass is set before display screen, and by display screen and dimming glass difference zoning, calculate the compensating parameter of each viewing area to be adjusted, then according to the compensating parameter of viewing area to be adjusted, obtain the printing opacity parameter in corresponding dimming glass region, according to printing opacity parameter described in each, regulate the transmittance of dimming glass, realize the inhomogeneity adjusting of brightness of display screen.What the present invention program regulated is the dimming glass transmittance before display screen, is from integral body, to change the brightness uniformity of display effect, and the final display effect of direct compensation, has improved brightness of display screen homogeneity, improves 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 for brightness of display screen uniformity adjusting method of the present invention and system is described in detail below.
As shown in Figure 1, the schematic flow sheet for brightness of display screen uniformity adjusting method embodiment of the present invention, comprises step:
Step S101: display screen to be adjusted and the dimming glass be located at before it are divided into a plurality of viewing areas 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 the region division of dimming glass is less, transparency improves.Dimming glass can be realized by automatically controlled, temperature control, light-operated, voltage-controlled etc. variety of way the switching of transparent and opaque state and the adjusting of transmittance of glass.
By display screen zoning, can be to distribute display screen is on average divided into X*Y equal portions region according to pixel, can be also directly average division, such as being divided into X*X equal portions etc.The object of this programme zoning is in order to distinguish the region of brightness irregularities, such as, the dark angular zone of dark side.Therefore, the region of division is more, and the effect of adjustment is better.
In this programme, the homogeneity of viewing area is regulated and realized by dimming glass, so must there be dimming glass region corresponding viewing area, zoning is carried out by dimming glass in the region that therefore corresponding display screen is divided.Certainly, in same screen, can only have a dimming glass, zoning is carried out in the region that the corresponding display screen of dimming glass is divided, and realizes the inhomogeneity adjustment in corresponding viewing area.Such as display screen is divided into X*Y equal portions viewing area, so corresponding viewing area will be divided into X*Y equal portions dimming glass region with the onesize dimming glass of display screen.As another kind of implementation, also can splice by several dimming glass, realize the division to dimming glass.Such as display screen is divided into X*Y equal portions viewing area, can be spliced by the dimming glass of the corresponding viewing area of X*Y piece size so, realize the inhomogeneity adjustment of reply display screen.Certainly, a dimming glass also can be responsible for a plurality of viewing areas.When being a plurality of display screen (such as combination), can there is polylith dimming glass to realize the adjusting to a plurality of display screens.
Step S102: obtain the average brightness of each viewing area, determine the minimum brightness mean value in average brightness, minimum average B configuration brightness value is made as 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 averages.Also can gather the brightness value of the several represent pixel points in this region, then average, obtain average brightness.
Obtaining the average brightness of each viewing area can realize by multimetering mode, but that this mode expends time in is long, and efficiency is low.
As a kind of optimal way wherein, obtain the average brightness step of each viewing area, comprising:
A1: the picture that obtains the complete white display frame of display screen of shooting;
Display screen is adjusted to and shows complete white picture, after taking pictures by filming apparatus, obtain picture.
A2: the viewing area of dividing according to display screen is divided into a plurality of picture region by picture correspondence;
A3: obtain the initial average brightness value in each picture region according to picture;
Improving brightness uniformity needs multi-point sampler brightness, and test point quantity is more much more accurate.By the form of taking pictures, obtain initial average brightness value, improved greatly treatment effeciency.
A4: the initial average brightness value in each picture region is multiplied each other with corresponding image correction parameter, obtain the average brightness value of each viewing area.
Image correction parameter is exactly photo and the actual conditions correction parameter before that filming apparatus draws.Each region correspondence has an image correction parameter, and initial average brightness value is multiplied each other with corresponding image correction parameter, can obtain the real average brightness value in viewing area.
Step S103: calculate the compensating parameter of each viewing area to be adjusted according to average brightness and desired value, wherein, viewing area to be adjusted refers in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
Owing to realizing brightness uniformity, be that the high pixel of brightness value is regulated toward the low pixel of brightness value, 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, in the situation that the transmittance that is acquiescence dimming glass itself is here 100%, the higher region of brightness value is only viewing area to be adjusted.When the transmittance of dimming glass is not 100%, still need dimming glass region corresponding to the low viewing area of brightness value to regulate.
The compensating parameter method of calculating viewing area to be adjusted has a variety of, and this enforcement is enumerated wherein a kind of mode and described.
According to average brightness and desired value, calculate the compensating parameter step of each viewing area to be adjusted, 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 of calculating in this way, can realize the high region of brightness value is regulated toward the low region of brightness value.
In an embodiment, can also there is the step that judges whether to carry out homogeneity compensation therein, such as, according to average brightness and desired value, calculate the compensating parameter step of each viewing area to be adjusted, comprising:
Whether the ratio that judges 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, obtain the compensating parameter of corresponding viewing area to be adjusted.
By judgement, can realize the display screen that is less than goal-selling threshold value is adjusted, until ratio while being more than or equal to targets threshold, stops the inhomogeneity adjustment of brightness of display screen.
Step S104: 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 printing opacity parameter.Here according to each printing opacity parameter, regulate the transmittance of dimming glass to refer to the transmittance that regulates corresponding dimming glass region 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;
The transmittance step that regulates dimming glass according to each printing opacity parameter, comprising:
According to printing opacity parameter, determine the magnitude of voltage in corresponding dimming glass region;
According to magnitude of voltage, regulate the transmittance of electronic control type dimming glass.
By automatically controlled mode, realize the adjusting of dimming glass transmittance, efficiency is high, and accuracy is good.
In an embodiment, display screen is DLP display screen, LED display, PDP display screen or OLED display screen therein.
Therein in an embodiment, after realizing a brightness uniformity adjusting, 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 continuing, adjust, when not meeting, continue to adjust, continue repeating step S102 to S104, until meet the demands.
What the present invention program regulated is the dimming glass transmittance before display screen, is from integral body, to change the brightness uniformity of display effect, and the final display effect of direct compensation, has improved brightness of display screen homogeneity.Such as, LCD display comprises backlight and liquid crystal panel, 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 equipment, and the homogeneity of LCD light source is not equal to LCD brightness show uniformity.And this programme has not only been considered light source, also considering can light guide plate, reflector plate ... the inhomogeneous effect that the parts such as liquid crystal cell cause, thus brightness uniformity improved, improve display effect, make 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 to obtain average brightness with the employing form of taking pictures and combine etc., concrete combination will not enumerate.
For clearer, understand this programme, lift one of them concrete example that uses and describe:
In display screen surface, tightly stick one deck dimming glass, display screen shows complete white picture, takes complete white picture obtain display frame by 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 fixing corrected parameter of filming apparatus for C1=0.95, C2=1, C3=0.9(.）
Can obtain the average brightness value of viewing area: B1=95, B2=95, B3=81, brightness uniformity Buni=81/95=85% now, hypothetical target threshold value is made as 95%.Due to 85%<95%, do not meet the demands, need to adjust glass transmittance and compensate.
Thereby can show that the region that B1 and B2 are 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 transmittance of adjusting the 1st region is that 85%, the second region is that 85%, the three region is 100%, after having adjusted, and 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%), without continuing, adjusts.
According to said method, the present invention also provides a kind of brightness of display screen homogeneity adjustment System, and as shown in Figure 2, the structural representation for brightness of display screen homogeneity adjustment System embodiment of the present invention, comprising:
Module 210 is divided in first area, for display screen to be adjusted and the dimming glass be located at before it are divided into a plurality of viewing areas 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 of average brightness, is made as 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 in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
In an embodiment, dimming glass is electronic control type dimming glass therein;
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.
In an embodiment, compensating parameter determination module comprises therein:
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, when 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.
In an embodiment, average brightness determination module comprises therein:
Picture acquisition module, for obtaining the picture of the complete white display frame of display screen of shooting;
Second area is divided module, for the viewing area of dividing according to display screen, picture correspondence is divided into a plurality of 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 the initial average brightness value in each picture region is multiplied each other with corresponding image correction parameter, obtains the average brightness value of each viewing area.
In an embodiment, display screen is DLP display screen, LED display, PDP display screen or OLED display screen therein.
Each embodiment can independent assortment, at this, will not enumerate.
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 has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore 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 a plurality of viewing areas 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 made as to desired value;
According to described average brightness and described desired value, calculate the compensating parameter of each viewing area to be adjusted, wherein, described viewing area to be adjusted refers in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
According to the compensating parameter of viewing area to be adjusted, obtain the printing opacity parameter in corresponding dimming glass region, according to printing opacity parameter described in each, regulate the transmittance of dimming glass.
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 that regulates dimming glass according to printing opacity parameter described in each, comprising:
According to described printing opacity parameter, determine the magnitude of voltage in corresponding dimming glass region;
According to described magnitude of voltage, regulate the transmittance of electronic control type dimming glass.
3. brightness of display screen uniformity adjusting method according to claim 1 and 2, is characterized in that, describedly according to described average brightness and described desired value, calculates the compensating parameter step of each viewing area to be adjusted, comprising:
Whether the ratio that judges 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, 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.
4. brightness of display screen uniformity adjusting method according to claim 1 and 2, is characterized in that, described in obtain the average brightness step of each viewing area, comprising:
Obtain the picture of the complete white display frame of display screen of shooting;
The viewing area of dividing according to described display screen is divided into a plurality of picture region by described picture correspondence;
According to described picture, obtain the initial average brightness value in each picture region;
Initial average brightness value in each picture region is multiplied each other with corresponding image correction parameter, obtain the average brightness value of each viewing area.
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:
Module is divided in first area, for display screen to be adjusted and the dimming glass be located at before it are divided into a plurality of viewing areas 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 of described average brightness, is made as 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 in each viewing area other viewing area except the corresponding viewing area of minimum brightness mean value;
Transmittance adjustment module, for obtain 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 printing opacity parameter described in each.
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. according to the brightness of display screen homogeneity adjustment System described in claim 6 or 7, it 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, by being divided by of 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. according to the brightness of display screen homogeneity adjustment System described in claim 6 or 7, it is characterized in that, described average brightness determination module comprises:
Picture acquisition module, for obtaining the picture of the complete white display frame of display screen of shooting;
Second area is divided module, for the viewing area of dividing according to described display screen, described picture correspondence is divided into a plurality of 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 each other with corresponding image correction parameter, obtains the average brightness value of each viewing area.
10. according to the brightness of display screen homogeneity adjustment System described in claim 6 or 7, it is characterized in that, described display screen is DLP display screen, LED display, PDP display screen or OLED display screen.
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