CN101471044B - Method for accelerated regulation of gamma comparison table - Google Patents
Method for accelerated regulation of gamma comparison table Download PDFInfo
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- CN101471044B CN101471044B CN2007101608743A CN200710160874A CN101471044B CN 101471044 B CN101471044 B CN 101471044B CN 2007101608743 A CN2007101608743 A CN 2007101608743A CN 200710160874 A CN200710160874 A CN 200710160874A CN 101471044 B CN101471044 B CN 101471044B
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Abstract
The invention relates to a method for speeding up the adjustment of a gamma comparison table, the method is suitable for a liquid crystal display, the gamma comparison table is used for memorizing the transforming relationship between the voltage and the gray scale, and the liquid crystal display displays images according to the gamma comparison table. The method comprises the following steps: inputting data, providing only one target electrical level for each of the gray scales in the specific gray scale display section, thereby the electrical level of each gray scale in the gray scale display section is the same to display the same target gray scale, if any pixel in the display section in the liquid crystal display which is input with the data displays the target gray scale, correcting the pixel and displays the color temperature of the target scale, wherein the transforming relationship between the voltage and the gray scale in the gamma comparison table is adjusted through correcting the color temperature.
Description
Technical field
The present invention relates in order to adjust the method for display device, particularly in order to quicken to adjust the method for the gamma table of comparisons.
Background technology
In the development in science and technology in modern age, the photoelectricity scientific and technological industry is maked rapid progress at a tremendous pace, the quality of various photoelectric display products also progresses greatly day by day, the preliminary display panel of producing of manufacturer is because in physics and optical characteristics difference to some extent, therefore need also could promote smoothly to market through could accurately meeting the demand of human vision after the adjustment.Part about adjustment, for instance, human visual experience is not linear, variation impression for gray scale when light is dark is comparatively obvious, it is then obviously little for gray difference when light is bright, in order to solve this visual difference, having adopted gamma value on known technology is that 2.2 gamma curve is adjusted, and this gamma curve is with curve mode but not linear fashion is described the relation of gray scale and voltage.So the voltage of being changed by gamma curve adds on the liquid crystal molecule, can change the angle of molecule rotation and influence light transmission capacity, on different gray scales, can give each effect that the gray scale difference highlights with different voltage.
On circuit design.Usually make the gamma table of comparisons and describe gamma curve, that is to say,, on gamma curve, define limited a plurality of adjustment points, contrast the relation of gray scale and voltage based on the consideration that reduces circuit complexity and reduction circuit area.But actually, only using gamma value is that 2.2 gamma curve adjustment is not enough, and this reason is fallen non-ly to be that adjustment on the table of comparisons counts out insufficiently, but is to consider that other influence factors such as colour temperature adjust again.
Therefore; for display image normally; in the time of just must doing further adjustment again to each gray scale; when adjusting again; usually can make display panel show that some view data judge the quality of full frame video picture earlier; again according to the run business into particular one adjustment of portion of the effect of this demonstration; for example, the method for adjustment is when this picture wherein has the colour developing in a zone undesired, and going for out in this zone is that the demonstration of which specific gray scale is undesired on earth; just can go at the run business into particular one adjustment of portion of certain several gray scale; usually, present technology adopts trial and error pricing, that is to say; conjecture is which gray scale has problem, tries to add and subtract voltage adjustment arbitrarily then and looks at.
Moreover, when above-mentioned colour developing that should zone when undesired, show many adjacent color ranges simultaneously by this zone, being difficult to directly judge is which gray scale has problem, under the situation of using 256 rank gray scales, 256 kinds of possibilities are arranged under worst condition, and therefore, such method of adjustment will face the low shortcoming of efficient.
Therefore, for the opto-electronics of stressing efficient and quality at present, known method uses inadequately, even, the display size of made is also increasing at present, and client is also fastidious day by day for the quality of resolution and image, and must develop the method that the adjustment that can quicken the gamma table of comparisons.
Summary of the invention
Purpose of the present invention is for providing a kind of in order to quicken to adjust the method for the gamma table of comparisons, be applicable to LCD, this gamma table of comparisons is used for the transformational relation of stored voltage and gray scale, this LCD is also come display image according to this gamma table of comparisons, and the method includes the steps of: the input data; Given target level each rank gray scale between the gray scale viewing area, the level of this each the rank gray scale in making between this gray scale viewing area is identical and all show a target gray scale; If one in this LCD of these data of input shows when having arbitrary pixel to show this target gray scale in the undesired zone, then proofread and correct the colour temperature of shown this target gray scale of this pixel, wherein by proofreading and correct the transformational relation that this colour temperature is adjusted voltage and gray scale in this gamma table of comparisons; And if the input these data this LCD in this show when not having arbitrary pixel to show this target gray scale in the undesired zone, then do not proofread and correct this colour temperature of shown this target gray scale of any pixel, and keep the demonstration of these original data.
Provided by the present inventionly because each the rank gray scale between certain specific viewing area all is made as same grayscale, therefore be easy to differentiate the abnormal part of colour developing in order to quicken to adjust the method for the gamma table of comparisons, can be efficient to the gamma table of comparisons to adjustment.Moreover in order further to promote quality, gray scale number interior between specific viewing area of the present invention can be adjusted arbitrarily, and how many grey purposes can determine the exquisite degree of video picture, and therefore, method provided by the present invention is taken into account speed and quality simultaneously.
Description of drawings
Fig. 1 illustrates the process flow diagram in order to the method for the adjustment of quickening the gamma table of comparisons according to the embodiment of the invention;
Fig. 2 illustrates according to the distribution plan between the gray scale viewing area of the embodiment of the invention; And
Fig. 3 illustrates the synoptic diagram according to the display panel of the embodiment of the invention.
The main element symbol description
S101～S107: in order to each step of the method for the adjustment of quickening the gamma table of comparisons
201～207: between the gray scale viewing area
301: the zone
303: display panel
Embodiment
Below describe structure of the present invention and method in detail.Prospectus of the present invention is not to be to define the present invention.The present invention is defined by claim.All embodiments of the invention, feature, viewpoint and advantage etc. can obtain fully to understand by following explanation claims and accompanying drawing.
Method provided by the present invention is applicable to any display that needs gamma curve to adjust image display quality, as LCD (display panels), or LCOS (liquid crystal on silicon) panel or the like, all in covering scope of the present invention.In order to specifically describe the present invention, at this will be that example illustrates with the LCD, in a LCD, usually make the gamma table of comparisons according to gamma curve, make each specified point stored voltage on the table of comparisons and the transformational relation of gray scale, therefore, LCD can be come display image according to this gamma table of comparisons, actually, when adjusting gamma curve, as long as the value on the adjustment table of comparisons that is to say, directly the corresponding relation on the table of comparisons is filled out updating value, just can therefore promote display quality.
The embodiment of the invention is found out some abnormal gray scale that develops the color at the gamma table of comparisons and is adjusted, and fill out the display capabilities that updating value promotes display, and when adjusting the gamma table of comparisons, the mode of embodiment of the invention adjustable color temperature is come the control value on the gammate table of comparisons.
In embodiments of the present invention, can import data to this display panel earlier and do test, when the colour developing of a certain zone is undesired, get final product the gammate table of comparisons, please refer to Fig. 1 and Fig. 2, Fig. 1 illustrates the process flow diagram in order to the method for the adjustment of quickening the gamma table of comparisons according to the embodiment of the invention.Fig. 2 illustrates according to the distribution plan between the gray scale viewing area of the embodiment of the invention.At step S101, given target level each rank gray scale between the gray scale viewing area, the level of this each the rank gray scale in making between this gray scale viewing area is identical and all show a target gray scale.That is to say, between example gray scale viewing area as shown in Figure 2 201, gray scale 1～8 is made as identical target level, that is to say, the brightness of these 8 gray scales is all identical, also because the identical cause of collective's brightness, therefore quite obvious in display frame, also be easy to find the interval of ging wrong, further, can be made as the highest gray scale (gray scale 256) to these 8 gray scales, if when being made as the highest gray scale, when if the incandescent point of gray scale 256 appears suddenly in the undesired zone of colour developing, make mistakes with regard to almost judging a certain gray scale in the gray scale 1～8, therefore the invention provides efficient method and solve the abnormal problem of colour developing.
Fig. 3 illustrates the synoptic diagram according to the display panel of the embodiment of the invention.Zone 301 is the abnormal zone of colour developing, adjusting the gamma table of comparisons must grab this gray scale that shows undesired zone and adjust, please more simultaneously with reference to figure 1 and Fig. 3, in step S103, if when in the undesired viewing area 301 in this LCD of these data of input arbitrary pixel display-object gray scale being arranged, judge that then the input pixel drops on the target level scope, that is to say, when if we show the highest gray scale with gray scale 1～8, when these bright spots do not appear at the abnormal zone of this colour developing, then enter among the step S105, be returned to original data, still, when appearing at this, these bright spots show in abnormal zone, then enter among the step S107, must find out (highlight) this bright spot pixel, and adjust the gray scale of this bright spot pixel.
Two kinds of situations that step S105 and step S107 representative are proofreaied and correct or do not proofreaied and correct, if when not having arbitrary pixel to show this target gray scale in this viewing area in this LCD of these data of input, do not proofread and correct this colour temperature of shown this target gray scale of this pixel at step S105, and keep this original data presentation, if in this viewing area in this LCD of these data of input and when having arbitrary pixel to show this target gray scale, S107 then proofreaies and correct the colour temperature of shown this target gray scale of this pixel, wherein by proofreading and correct the transformational relation that this colour temperature is adjusted voltage and gray scale in this gamma table of comparisons.
By method provided by the present invention, can find out the abnormal gray scale of colour developing immediately and adjust colour temperature, take into account efficient and quality, the foregoing description is an example with gray scale 1～8, in gray scale 1～8 just often, but class is pushed into gray scale 9～16,17～24 or the like.Please refer to Fig. 2, present embodiment is divided into full gray scale (for example being 256 gray scales) between 256/8=32 gray scale viewing area, only comprise 8 gray scales between each gray scale viewing area, be described as follows: 201 comprise gray scale 1 to gray scale 8 between the gray scale viewing area, 203 comprise gray scale 9 to gray scale 16 between the gray scale viewing area, 205 comprise gray scale 17～gray scale 24 between the gray scale viewing area, and 207 comprise gray scale 25～32 between the gray scale viewing area, can the rest may be inferred between remaining gray scale viewing area.Then, can after having looked for undesired value, adjust till whole color temperature values in regular turn with being made as the brightness of gray scale 256 between the viewing area.
Those skilled in the art should know, the embodiment of the invention is not limited to 201～207 the brightest brightness that are made as gray scale 256 in regular turn between each gray scale viewing area, the given different target level of visual its demand and collective is made as other brightness, the embodiment of the invention and be that colour temperature is adjusted in an interval with 8 gray scales, change the value on the table of comparisons after the adjustment according to this, can use interpolation method to obtain the value of intermediate point between each color temperature point.
Those skilled in the art should know, be not limited to comprise 8 gray scales between each gray scale viewing area, visual demand is adjusted to and comprises 16 gray scales or more gray scales, or visual demand is adjusted to and comprises 4 gray scales or gray scale still less, its reason is, when comprising more many gray scales between the gray scale viewing area, then speed is very fast and circuit complexity is lower once to adjust a plurality of gray scales, and when comprising more few gray scale between the gray scale viewing area, then display quality is better, therefore works as visual its demand and increases and decreases the gray scale number that is comprised between the gray scale viewing area of the embodiment of the invention.
Though the present invention is described with reference to preferred embodiment, will be appreciated that the present invention creates to be not limited to its detailed description.Substitute mode and alter mode advise in previous description, and other substitute modes and alter mode will can be expected for those skilled in the art.Particularly, according to structure of the present invention and method, all have be same as in fact member of the present invention in conjunction with and reach the neither disengaging category of the present invention of identical result in fact with the present invention.Therefore, all these substitute modes and alter mode are intended to drop on the present invention in the category that claims and equipollent thereof defined of enclosing.
Claims (8)
1. one kind in order to quicken to adjust the method for the gamma table of comparisons, be applicable to LCD, this gamma table of comparisons is used for the transformational relation of stored voltage and gray scale, and this LCD is come display image according to this gamma table of comparisons, it is characterized in that the method includes the steps of:
The input data;
Each rank gray scale between given target level to gray scale viewing area, the level of this each the rank gray scale in making between this gray scale viewing area is identical and all show a target gray scale;
If one in this LCD of these data of input shows when having arbitrary pixel to show this target gray scale in the undesired zone, then proofread and correct the colour temperature of shown this target gray scale of this pixel, wherein by proofreading and correct the transformational relation that this colour temperature is adjusted voltage and gray scale in this gamma table of comparisons; And
If this in this LCD of these data of input shows when not having arbitrary pixel to show this target gray scale in the undesired zone, then do not proofread and correct this colour temperature of shown this target gray scale of any pixel, and keep the demonstration of these original data.
2. method as claimed in claim 1 further comprises following steps:
Given different target level is between different gray scales viewing area, to proofread and correct the colour temperature of different target gray scale respectively.
3. method as claimed in claim 2 further comprises following steps:
To be divided into respectively between different gray scales viewing area between whole gray scales viewing area.
4. method as claimed in claim 2 further comprises following steps:
Colour temperature after the use interpolation method is proofreaied and correct the different target gray scale corresponds to other gray scales between the different target gray scale.
5. method as claimed in claim 1 further comprises following steps:
Different gray scale indication ranges are implemented this method in regular turn, proofread and correct the colour temperature of different target gray scale in regular turn.
6. method as claimed in claim 5 further comprises following steps:
To be divided into respectively between different gray scales viewing area between whole gray scales viewing area.
7. method as claimed in claim 5 further comprises following steps:
Colour temperature after the use interpolation method is proofreaied and correct the different target gray scale corresponds to other gray scales between the different target gray scale.
8. method as claimed in claim 1 wherein has number and is 8 gray scale between this gray scale viewing area.
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| CN2007101608743A CN101471044B (en) | 2007-12-27 | 2007-12-27 | Method for accelerated regulation of gamma comparison table |
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| CN2007101608743A CN101471044B (en) | 2007-12-27 | 2007-12-27 | Method for accelerated regulation of gamma comparison table |
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| CN102413268B (en) * | 2011-11-10 | 2013-09-11 | 武汉大学 | Image brightness regulating method based on human vision characteristics |
| CN108877734B (en) * | 2018-06-14 | 2020-04-21 | Oppo广东移动通信有限公司 | Color temperature adjusting method of touch display screen and related product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1845232A (en) * | 2005-04-08 | 2006-10-11 | 浙江大学 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1845232A (en) * | 2005-04-08 | 2006-10-11 | 浙江大学 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
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