CN101308629B - Liquid crystal display, back light module and light source regulating method - Google Patents
Liquid crystal display, back light module and light source regulating method Download PDFInfo
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- CN101308629B CN101308629B CN2008101276507A CN200810127650A CN101308629B CN 101308629 B CN101308629 B CN 101308629B CN 2008101276507 A CN2008101276507 A CN 2008101276507A CN 200810127650 A CN200810127650 A CN 200810127650A CN 101308629 B CN101308629 B CN 101308629B
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Abstract
The invention discloses a liquid crystal display, a backlight module and a light source adjusting method. The backlight module, applicable on liquid crystal displays, comprises a plurality of light source sections, each of which comprises three light sources; a receiver module receives a plurality of pixel data corresponding to a light source section, and each light source section has three pixel values; an average calculation module calculates the average value of the three pixel values according to the three pixel values; a light source section backlight calculation module calculates the backlight values of the three light source sections according to the three pixel values, and each light source section has multiple backlight values and corresponds to one algorithm and each algorithm corresponds to a lightness range; a lightness judgment module judges the lightness range to which the average value of the three pixels corresponds; a selector module selects a light source section backlight value which corresponds to the algorithm of the lightness range from the three light source section backlight values according to the lightness range of the average value of the three pixels; a light source adjustment module adjusts the three light sources of the light source sections according to the three selected light source section backlight values.
Description
Technical field
The invention relates to a kind of backlight module, and particularly relevant for a backlight liquid crystal display module and a kind of light source adjustment method that is used for backlight module.
Background technology
Present LCD Technology when doing back light control, mainly is to utilize a light source and modulator, and collocation optical texture between the two, and red, green and blue GTG value backlight is done regional control simultaneously.Practice so except the dynamic range of LCD or contrast can increase, more can be saved power.Such adjustment mode is referred to as strength control (Intensity control) technology.But such practice because be with three dimensions simultaneously with identical modulation amount modulation, therefore on the saturation degree of color, can't present the due degree of enriching of each color, and make picture can't reach lifelike effect.
Therefore, how designing a new backlight module, can further carry out controlling to different light sources regionally, to reach the high effect of color saturation, be an industry problem demanding prompt solution for this reason.
Summary of the invention
Therefore the invention relates to a kind of light source adjustment method is provided, be applicable to a backlight liquid crystal display module, backlight module comprises a plurality of light source region, each light source region comprises three light sources, light source adjustment method comprises the following step: receive one of them a plurality of pixel datas of corresponding light source district, pixel data has three pixel values respectively; Three pixel values according to pixel data calculate three pixel average respectively; Three pixel values according to pixel data calculate three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm; Judge the brightness range that three pairing brightness values of pixel average are affiliated; According to three pairing each brightness ranges of pixel average, respectively select a pair of light source region backlight value that algorithm calculated that should brightness range from three groups of light source region backlight value; And three light sources adjusting light source region respectively according to the light source region backlight value of three selections.
Another object of the present invention is to provide a kind of backlight module, comprise: a plurality of light source region, a receiver module, a mean value calculation module, a light source region backlight value computing module, a brightness judge module, a scope judge module, are selected a module and a light source adjusting module.Each light source region comprises three light sources; Receiver module is in order to receiving one of them a plurality of pixel datas of corresponding light source district, and pixel data has three pixel values respectively; The mean value calculation module is calculated three pixel average respectively according to three pixel values of pixel data; Light source region backlight value computing module is in order to three pixel values according to pixel data, calculates three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm; The brightness judge module is in order to judge three brightness ranges under the pairing brightness value of pixel average; A ruddiness brightness range, a green glow brightness range and the blue light brightness range of scope judge module in order to judge this ruddiness brightness, this green glow brightness and this blue light brightness correspondence; One selects module, and in order to according to pairing each brightness range of these three pixel average, these three groups of light source region backlight value are respectively selected a pair of light source region backlight value that this algorithm calculated that should brightness range certainly; And light source adjusting module is in order to adjust three light sources of light source region respectively according to the light source region backlight value of three selections.
Another purpose of the present invention is to provide a kind of LCD, comprises:
A kind of LCD comprises: a backlight module and a display panel.Backlight module comprises: a plurality of light source region, a receiver module, a mean value calculation module, a light source region backlight value computing module, a brightness judge module, are selected a module and a light source adjusting module.Each light source region comprises three light sources; Receiver module is in order to receive one of them a plurality of pixel datas of corresponding light source district, and pixel data has three pixel values respectively; The mean value calculation module is calculated three pixel average respectively according to three pixel values of pixel data; Light source region backlight value computing module is in order to three pixel values according to pixel data, calculates three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm; The brightness judge module is in order to judge three brightness ranges under the pairing brightness value of pixel average; One selects module, is in order to according to pairing each brightness range of these three pixel average, and these three groups of light source region backlight value are respectively selected a pair of light source region backlight value that this algorithm calculated that should brightness range certainly; And light source adjusting module is in order to adjust three light sources of light source region respectively according to the light source region backlight value of three selections.Display panel is arranged at an exiting surface of backlight module, and three light source transmission display panels of light source region form an image.
The invention has the advantages that and to utilize different brightness and select different algorithms, the light source of different color is carried out controlling regionally, reaching the high effect of color saturation, and reach above-mentioned purpose easily.
After consulting embodiment graphic and that describe subsequently, this technical field has knows that usually the knowledgeable just can understand purpose of the present invention, and technological means of the present invention and enforcement aspect.
Description of drawings
Fig. 1 is the explosive view of the LCD of the first embodiment of the present invention;
Fig. 2 is the synoptic diagram of the backlight module of the first embodiment of the present invention;
Fig. 3 is the calcspar of the backlight module of the first embodiment of the present invention;
Fig. 4 A is the synoptic diagram that seeking of the first embodiment of the present invention tabled look-up;
Fig. 4 B is the synoptic diagram that seeking of another embodiment of the present invention tabled look-up;
Fig. 5 is a display frame through adjusted pixel value, with the corresponding relation figure of the pixel value that is only calculated with the mean value algorithm; And
Fig. 6 is the process flow diagram of the light source adjustment method of the second embodiment of the present invention.
[primary clustering symbol description]
1: LCD 10: backlight module
12: display panel 20: light source region
20a: red light source 20b: green light source
20c: blue-light source 300: light source region
300a: red light source 300b: green light source
300c: blue-light source 301: pixel data
301a: red pixel value 301b: green pixel values
301c: blue pixel value 304a: red pixel mean value
304b: green pixel mean value 304c: blue pixel mean value
302: receiver module 304: the mean value calculation module
306: light source region backlight value computing module 306a: red light source region backlight value
306b: green light source region backlight value 306c: blue light source region backlight value
308: brightness judge module 308a, 308b and 308c: brightness range
310: storage module 312: select module
311: seek and table look-up 314: light source adjusting module
312a, 312b and 312c: light source region backlight value
Embodiment
Please refer to Fig. 1, be the explosive view of the LCD 1 of the first embodiment of the present invention.LCD 1 comprises a backlight module 10 and a display panel 12.Please also refer to Fig. 2, be the synoptic diagram of the backlight module 10 of the first embodiment of the present invention.Backlight module 10 is divided into a plurality of light source region, and wherein each light source region respectively comprises a red light source 20a, a green light source 20b and a blue-light source 20c shown in light source region 20.Each light source of light source region 20 can send the light of different colours, and each light source sees through the display panel 12 of an exiting surface that is arranged at backlight module 10, and forms an image.
Fig. 3 is a detailed block diagram of the backlight module 10 of the first embodiment of the present invention.Backlight module 10 comprises: a plurality of light source region, a receiver module 302, a mean value calculation module 304, a light source region backlight value computing module 306, a brightness judge module 308, a storage module 310, are selected a module 312 and a light source adjusting module 314.Being to be example with a light source region 300 wherein among Fig. 3, comprising three light sources in each light source region, is respectively red light source 300a, green light source 300b, blue-light source 300c.Receiver module 302 is in order to receive one of them a plurality of pixel datas 301 of corresponding each light source region.In present embodiment, these pixel datas 301 promptly correspond to light source region 300.In these pixel datas 301, each pixel data all has three pixel values respectively, and promptly corresponding three light sources are respectively a red pixel value 301a, a green pixel values 301b and a blue pixel value 301c.
Mean value calculation module 304 is calculated a red pixel mean value 304a, a green pixel mean value 304b and a blue pixel mean value 304c respectively according to the red pixel value 301a of each pixel data in the pixel data 301, a green pixel values 301b and a blue pixel value 301c.Light source region backlight value computing module 306 is in order to according to the red pixel value 301a of each pixel data in the pixel data 301, a green pixel values 301b and a blue pixel value 301c, calculate three groups of light source region backlight value respectively, be one group of red light source region backlight value 306a, one group of green light source region backlight value 306b and one group of blue light source region backlight value 306c, and respectively organize the light source region backlight value and comprise a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm.Each storage module 310 storage one is sought and is tabled look-up 311, and brightness judge module 308 is according to seeking table look-up 311 judgements three pixel average 304a, 304b and an affiliated brightness range 308a, 308b and the 308c of the pairing brightness value of 304c.Select module 312 according to three pixel average 304a, 304b and 304c pairing each brightness range 308a, 308b and 308c, in three groups of light source region backlight value 306a, 306b and 306c, each selects a pair of a light source region backlight value 312a, 312b and 312c that algorithm calculated that should brightness range.In present embodiment, seek and table look-up 311 shown in Fig. 4 A, brightness is divided into the different brightness of 0-255, and these brightness are divided into 1-8 brightness degree.In other embodiment, brightness also can be divided into the brightness degree of other number in response to needs, and is not limit by 8.8 above-mentioned brightness degrees further are divided into two brightness ranges, respectively correspond to an algorithm, and therefore respectively organizing the light source region backlight value all comprises two light source region backlight value.When pixel average falls within the brightness degree of low intensity range of 1-4, for avoiding the too high light leakage phenomena that causes of backlight illumination, the light source region backlight value that therefore adopts average algorithm that the pixel value of the pixel data in the corresponding light source district 300 is calculated on an average.And when pixel average falls within the brightness degree of high intensity range of 5-8, because brightness eminence picture can brighter degree highlight, therefore adopt the maximal value algorithm with in the pixel data in the corresponding light source district 300, get max pixel value as the light source region backlight value that is calculated.
And in other embodiment, seeking tables look-up 311 also can further be divided into three brightness ranges with brightness degree shown in Fig. 4 B, and each brightness range all corresponds to an algorithm, and therefore respectively organizing the light source region backlight value all comprises three light source region backlight value.When pixel average is when falling within the brightness degree of low intensity range of 1-2, to adopt the light source region backlight value that average algorithm calculated.Among pixel average falls within 3-4 during brightness range, the light source region backlight value that adopts the root mean square algorithm to be calculated is to obtain the light source region backlight value of characteristic between between low intensity range and high intensity range.And when pixel average falls within the brightness degree of high intensity range of 5-8, the light source region backlight value that adopts the maximal value algorithm to be calculated.Fig. 5 illustrates a display frame after adjusting through the algorithm of corresponding different brightness ranges, with the corresponding relation of the pixel value that is only calculated with the mean value algorithm.Certainly, the differentiation of the brightness range of other number, and do more detailed adjustment with the algorithm that meets each brightness range characteristic for the knowledgeable that knows usually of this area can spread to easily, and is not limit by above-mentioned number.
Light source adjusting module 314 further respectively according to light source region backlight value 312a, 312b and the 312c of three selections, is adjusted red light source 300a, green light source 300b, the blue-light source 300c of light source region.So, owing to utilizing different brightness to select different algorithms, the light source of different color is carried out controlling regionally, and can reach the high effect of color saturation.
The second embodiment of the present invention is the process flow diagram of a kind of light source adjustment method of the present invention as shown in Figure 6, and this light source adjustment method can be used for a backlight module.Backlight module comprises a plurality of light source region, and each light source region comprises three light sources, and light source adjustment method comprises the following step: step 601, receive one of them a plurality of pixel datas of corresponding light source district, and pixel data has three pixel values respectively; Step 602, three pixel values according to pixel data calculate three pixel average respectively; Step 603, three pixel values according to pixel data calculate three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm; Step 604 is judged the brightness range that three pairing brightness values of pixel average are affiliated; Step 605 according to three pairing each brightness ranges of pixel average, is respectively selected a pair of light source region backlight value that algorithm calculated that should brightness range from three groups of light source region backlight value; And step 606, adjust three light sources of light source region respectively according to the light source region backlight value of three selections.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. a light source adjustment method is applicable to a backlight module, and this backlight module comprises a plurality of light source region, and each these light source region comprises three light sources, it is characterized in that this light source adjustment method comprises the following step:
Receive one of them a plurality of pixel datas of corresponding these light source region, these pixel datas have three pixel values respectively;
These three pixel values according to these pixel datas calculate three pixel average respectively;
These three pixel values according to these pixel datas calculate three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm;
Judge the brightness range that the pairing brightness value of these three pixel average is affiliated;
According to pairing each brightness range of these three pixel average, these three groups of light source region backlight value are respectively selected a pair of light source region backlight value that this algorithm calculated that should brightness range certainly; And
Adjust these three light sources of this light source region respectively according to the light source region backlight value of these three selections;
These three pixel average are between 0-63 the time, and this algorithm is an average algorithm; These three pixel average are between 64-127 the time, and this algorithm is the root mean square algorithm; These three pixel average are between 128-225 the time, and this algorithm is the maximal value algorithm.
2. light source adjustment method as claimed in claim 1 is characterized in that, judges that this brightness range under pairing this brightness value of these three pixel average is to seek the judgement of tabling look-up according to one.
3. light source adjustment method as claimed in claim 1 is characterized in that, these three pixel values are a red pixel, a blue pixel and a green pixel, and these three light sources are a red light source, a blue-light source and a green light source.
4. a backlight module is characterized in that, comprises:
A plurality of light source region, each these light source region comprises three light sources;
One receiver module, in order to receive one of them a plurality of pixel datas of corresponding these light source region, these pixel datas have three pixel values respectively;
One mean value calculation module is these three pixel values according to these pixel datas, calculates three pixel average respectively;
One light source region backlight value computing module is in order to these three pixel values according to these pixel datas, calculates three groups of light source region backlight value respectively, and each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm of difference, the corresponding brightness range of each algorithm;
One brightness judge module is in order to judge the brightness range under the pairing brightness value of these three pixel average;
One selects module, and in order to according to pairing each brightness range of these three pixel average, these three groups of light source region backlight value are respectively selected a pair of light source region backlight value that this algorithm calculated that should brightness range certainly; And
One light source adjusting module is in order to adjust these three light sources of this light source region respectively according to the light source region backlight value of these three selections;
These three pixel average are between 0-63 the time, and this algorithm is an average algorithm; These three pixel average are between 64-127 the time, and this algorithm is the root mean square algorithm; These three pixel average are between 128-225 the time, and this algorithm is the maximal value algorithm.
5. backlight module as claimed in claim 4 is characterized in that, more comprises a storage module, seeks and tabling look-up in order to store one, and this brightness judges it is to seek tabling look-up according to this judging this brightness range under pairing this brightness value of these three pixel average.
6. backlight module as claimed in claim 4 is characterized in that, these three pixel values are a red pixel, a blue pixel and a green pixel, and these three light sources are a red light source, a blue-light source and a green light source.
7. a LCD is characterized in that, comprises:
One backlight module comprises:
A plurality of light source region, each these light source region comprises three light sources;
One receiver module is in order to receiving one of them a plurality of pixel datas of corresponding these light source region, and these pixel datas have three pixel values respectively;
One mean value calculation module is these three pixel values according to these pixel datas, calculates three pixel average respectively;
One light source region backlight value computing module, be in order to these three pixel values according to these pixel datas, calculate three groups of light source region backlight value respectively, each is organized the light source region backlight value and comprises a plurality of light source region backlight value, the corresponding algorithm computation of difference, the corresponding brightness range of each algorithm;
One brightness judge module is in order to judge the brightness range under the pairing brightness value of these three pixel average;
One scope judge module is in order to judge a ruddiness brightness range, a green glow brightness range and a blue light brightness range of ruddiness brightness, green glow brightness and blue light brightness correspondence;
One selects module, and in order to according to pairing each brightness range of these three pixel average, these three groups of light source region backlight value are respectively selected a pair of light source region backlight value that this algorithm calculated that should brightness range certainly; And
One light source adjusting module is in order to adjust these three light sources of this light source region respectively according to the light source region backlight value of these three selections; And
One display panel is arranged at an exiting surface of this backlight module, and three light sources of these light source region are to see through this display panel to form an image;
These three pixel average are between 0-63 the time, and this algorithm is an average algorithm; These three pixel average are between 64-127 the time, and this algorithm is the root mean square algorithm; These three pixel average are between 128-225 the time, and this algorithm is the maximal value algorithm.
8. LCD as claimed in claim 7 is characterized in that, more comprises a storage module, is to seek and tabling look-up in order to store one, and this brightness is judged to seek tabling look-up according to this and judged this brightness range under pairing this brightness value of these three pixel average.
9. LCD as claimed in claim 7 is characterized in that, these three pixel values are a red pixel, a blue pixel and a green pixel, and these three light sources are a red light source, a blue-light source and a green light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101276507A CN101308629B (en) | 2008-07-02 | 2008-07-02 | Liquid crystal display, back light module and light source regulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101276507A CN101308629B (en) | 2008-07-02 | 2008-07-02 | Liquid crystal display, back light module and light source regulating method |
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| Publication Number | Publication Date |
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| CN101308629A CN101308629A (en) | 2008-11-19 |
| CN101308629B true CN101308629B (en) | 2010-07-21 |
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| CN2008101276507A Expired - Fee Related CN101308629B (en) | 2008-07-02 | 2008-07-02 | Liquid crystal display, back light module and light source regulating method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833928B (en) * | 2010-04-24 | 2012-11-21 | 华映光电股份有限公司 | Method for adjusting luminosity of display and related backlight module |
| CN102737610B (en) * | 2011-03-31 | 2015-02-11 | 青岛海信电器股份有限公司 | Method and apparatus for adjusting light source brightness, and display device |
| WO2013166680A1 (en) * | 2012-05-10 | 2013-11-14 | 青岛海信信芯科技有限公司 | Regional backlight control method for edge light guide and backlight device |
| CN113168038B (en) * | 2019-03-28 | 2023-03-28 | 华为技术有限公司 | Method and device for displaying image |
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