CN101989408A - Light modulation method and system and television of bottom lighting LED (Light-Emitting Diode) back light module group - Google Patents
Light modulation method and system and television of bottom lighting LED (Light-Emitting Diode) back light module group Download PDFInfo
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- CN101989408A CN101989408A CN2010105633835A CN201010563383A CN101989408A CN 101989408 A CN101989408 A CN 101989408A CN 2010105633835 A CN2010105633835 A CN 2010105633835A CN 201010563383 A CN201010563383 A CN 201010563383A CN 101989408 A CN101989408 A CN 101989408A
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Abstract
The invention provides light modulation method and system and a television of a bottom lighting LED (Light-Emitting Diode) back light module group, which is applicable to the field of light modulation. The method comprises the following steps of: dividing a back light region into a plurality of sub regions in advance; and carrying out non-uniform blocking light modulation on LEDs in each divided sub region. Through dividing the back light region into a plurality of sub regions in advance and carrying out non-uniform blocking light modulation on the LEDs in each divided sub region according to the requirements, the light modulation method and system and the television of the bottom lighting LED back light module group can be applied in a theatre mode for realizing the non-uniform blocking light modulation according to the requirement, so the complete block field display of the black region can be realized, the image quality and the contrast can be improved, the design of a light modulation circuit can be simplified, and the design and the operation cost can be saved.
Description
Technical field
The invention belongs to the module field, relate in particular to a kind of light-dimming method, system and televisor of direct-light type LED backlight module.
Background technology
At present, the direct-light type LED backlight module, not only the space is big, is convenient to arrange more LED unit, also is convenient to heat radiation, and the support area light regulating technology, the dynamic contrast that promotes picture is had very significantly effect, thereby obtained application more and more widely.
In the prior art, the light-dimming method of common direct-light type LED backlight module, be the block that whole LED is divided into several same size area to be carried out the piecemeal light modulation according to the arrangement of LED and the ability of drive IC, this light-dimming method, can communicate with the driving of system, according to the required brightness of the picture of being carried to the block light modulation, but especially for the picture under the theater mode, owing to form by the black area of center picture and picture both sides, center, therefore, when the light-dimming method that adopts common direct-light type LED backlight module carries out the piecemeal light modulation to several same size area, the black area is dark not as in the ideal then, and system resource has been wasted in the light modulation of picture background zone leveling, has increased design cost.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of light-dimming method of direct-light type LED backlight module, be intended to solve picture under the theater mode with the light-dimming method light modulation of common direct-light type LED backlight module, the black area is dark not as in the ideal then, and system resource has been wasted in the light modulation of picture background zone leveling, has increased the problem of design cost.
The embodiment of the invention is achieved in that a kind of light-dimming method of direct-light type LED backlight module, said method comprising the steps of:
In advance backlight area is divided into plurality of sub-regions;
LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
The embodiment of the invention also provides a kind of light adjusting system of direct-light type LED backlight module, and described system comprises:
First is provided with module, is used in advance backlight area being divided into plurality of sub-regions;
Light-adjusting module is used for the LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
The embodiment of the invention also provides a kind of televisor, and described televisor comprises the light modulating device of above-mentioned direct-light type LED backlight module.
The embodiment of the invention compared with prior art, beneficial effect is: by in advance backlight area being divided into plurality of sub-regions; LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation as required, can be applicable under the theater mode, to carry out inhomogeneous piecemeal light modulation as required, thereby realize that black completely of black area shows, promote image quality and contrast, simplify the design of light adjusting circuit, saved the design and running cost.
Description of drawings
Fig. 1 is the process flow diagram of the light-dimming method of the direct-light type LED backlight module that provides of the embodiment of the invention;
Fig. 2 is the process flow diagram of the light-dimming method of the direct-light type LED backlight module that provides of another embodiment of the present invention;
Fig. 3 is the process flow diagram of the light-dimming method of the direct-light type LED backlight module that provides of further embodiment of this invention;
Fig. 4 is an exemplary plot of the light-dimming method of the direct-light type LED backlight module that provides of the embodiment of the invention;
Fig. 5 is the module frame chart of the light modulating device of the direct-light type LED backlight module that provides of the embodiment of the invention;
Fig. 6 is the module frame chart of the light modulating device of the direct-light type LED backlight module that provides of another embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, by in advance backlight area being divided into plurality of sub-regions; LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation as required, can be applicable under the theater mode, to carry out inhomogeneous piecemeal light modulation as required, thereby realize that black completely of black area shows, promote image quality and contrast, simplify the design of light adjusting circuit, saved the design and running cost.
The embodiment that the embodiment of the invention provides is as follows:
A kind of light-dimming method of direct-light type LED backlight module said method comprising the steps of:
In advance backlight area is divided into plurality of sub-regions;
LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
A kind of light adjusting system of direct-light type LED backlight module, described system comprises:
First is provided with module, is used in advance backlight area being divided into plurality of sub-regions;
Light-adjusting module is used for the LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
A kind of televisor, described televisor comprise the light modulating device of above-mentioned direct-light type LED backlight module.
Below in conjunction with specific embodiment realization of the present invention is described in detail:
Embodiment one:
See also Fig. 1, the embodiment of the invention provides a kind of light-dimming method of direct-light type LED backlight module, said method comprising the steps of:
S101: in advance backlight area is divided into plurality of sub-regions;
S102: the LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
Embodiments of the invention are by being divided into plurality of sub-regions with backlight area in advance; LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation as required, can be applicable under the theater mode, to carry out inhomogeneous piecemeal light modulation as required, thereby realize that black completely of black area shows, promote image quality and contrast, simplify the design of light adjusting circuit, saved the design and running cost.
See also Fig. 2, in one embodiment of the invention, step S101 is specially:
S201: in advance backlight area is divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at the picture background zone of the left and right sides, picture central area;
Step S102 is specially:
S202: the LED in picture central area, picture background zone and the black region is carried out inhomogeneous piecemeal light modulation according to degree from fine to coarse.
By backlight area being divided into three zones that are fit to theater mode, and three zones are carried out inhomogeneous piecemeal light modulation, can realize under the theater mode regional clearly and reach black completely of black region showing, make picture area seem clearly more demarcated, the center picture area reaches the finest and the smoothest light modulation, it is a lot of that its contrast can exceed common light modulation, thereby better promote image quality and contrast; Simplify the design of light adjusting circuit, thereby saved the design and running cost.
Certainly, in an embodiment of the present invention, can as required picture central area, picture background zone be divided into plural zone respectively once more, to reach finer and smoother effect, also black region can be divided into plural zone, not be used for limiting the present invention once more.
See also Fig. 3, in one embodiment of the invention, described S201 in advance backlight area is divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at after the step in picture background zone of the left and right sides, picture central area further comprising the steps of:
S203: in the picture central area, picture background zone and black region be provided with a plurality of blocks respectively, block area in the picture central area is less than the block area in the picture background zone, and the block area in the picture background zone is less than the block area in the black region.
In an embodiment of the present invention, the LED number in each block is the integral multiple of minimum single-string LED number.
In an embodiment of the present invention, described block is connected with the display module of display frame, to realize communication.
In an embodiment of the present invention, described degree according to from fine to coarse is specially the step that the LED in picture central area, picture background zone and the black region carries out inhomogeneous piecemeal light modulation:
According to degree from fine to coarse the LED in picture central area, picture background zone and the black region is carried out inhomogeneous piecemeal light modulation by modes such as SPI (Serial Peripheral Interface), IIC (Inter-Integrated Circuit) or PWM.
See also Fig. 4, an exemplary plot of the light-dimming method of the direct-light type LED backlight module that provides for the embodiment of the invention, made up a high H of being, wide is the LED-backlit source module of L, be earlier black region 403, picture central area 401,402 3 big zones, picture background zone with the entire backlight area dividing, design arranging of LED and light modulation scheme according to the demand subregion of picture area again.
In the design of two black regions 403, height can be set to 1/9 of about whole LED module height backlight, width is identical with whole LED module backlight, promptly highly be 1/9H, width is L, and two black regions are symmetrical about in the of 403, block in the black region 403 is that Minimum Area can be designed to highly be 1/9H, width is 1/3L, so just whole black region 403 is divided into 6 blocks, then the dim signal of the LED in six blocks is up and down controlled by SPI or alternate manner.
In the design of picture central area 401, height can be set at 7/9H, width can be set at 3/4L, block in the picture central area 401 is that Minimum Area can be designed to width 3/32L, height 7/27H, be about to the even block that picture central area 401 is divided into 3 row, 8 row of impartial 3*8, the dim signal of the LED in the block can be controlled by SPI or alternate manner.
In the design in picture background zone 402, height can be set at remaining 7/9H, width can be set at remaining about each 1/8L, two picture background zone 402 left-right symmetric, block in each picture background zone is that Minimum Area can be set at height 7/27H, the dim signal of LED in the width 1/8L, block can be controlled by SPI or alternate manner.
This size design can satisfy the adaptability demand of human eye more.
Embodiment two:
See also 5, the embodiment of the invention provides a kind of light adjusting system of direct-light type LED backlight module, and described system comprises:
First is provided with module 501, is used in advance backlight area being divided into plurality of sub-regions;
Light-adjusting module 502 is used for the LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
In an embodiment of the present invention, by in advance backlight area being divided into plurality of sub-regions; LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation as required, can be applicable under the theater mode, to carry out inhomogeneous piecemeal light modulation as required, thereby realize that black completely of black area shows, promote image quality and contrast, simplify the design of light adjusting circuit, saved the design and running cost.
In one embodiment of the invention, first is provided with module 501, specifically be used in advance backlight area being divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at the picture background zone of the left and right sides, picture central area;
Light-adjusting module 502 specifically is used for according to degree from fine to coarse the LED in picture central area, picture background zone and the black region being carried out inhomogeneous piecemeal light modulation.
See also Fig. 6, in one embodiment of the invention, described system also comprises:
Second is provided with module 503, be used in the picture central area, picture background zone and black region be provided with a plurality of blocks respectively, block area in the picture central area is less than the block area in the picture background zone, and the block area in the picture background zone is less than the block area in the black region.
In one embodiment of the invention, light-adjusting module 502 specifically is used for according to degree from fine to coarse the LED in picture central area, picture background zone and the black region being carried out inhomogeneous piecemeal light modulation by SPI, IIC or PWM mode.
In one embodiment of the invention, the height of described black region is 1/9 of a whole LED module height backlight, and width is identical with whole LED module width backlight;
The height of described picture central area is 7/9 of a whole LED module height backlight, and width is 3/4 of a whole LED module width backlight;
The height in described picture background zone is 7/9 of a whole LED module height backlight, and width is 1/8 of a whole LED module width backlight;
In one embodiment of the invention, the height of the even block in the described black region is 1/9 of a whole LED module height backlight, and width is 1/3 of a whole LED module width backlight;
The height of the even block in the described picture central area is 7/27 of a whole LED module height backlight, and width is 3/32 of a whole LED module width backlight;
The height of the even block in the described picture background zone is 7/27 of a whole LED module height backlight, and width is 1/8 of a whole LED module width backlight.
This size design can satisfy the adaptability demand of human eye more.
Embodiment three:
The embodiment of the invention provides a kind of televisor, and described televisor comprises the light adjusting system of above-mentioned direct-light type LED backlight module.
The light-dimming method of direct-light type LED backlight module of the present invention, system and televisor are by being divided into plurality of sub-regions with backlight area in advance; LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation as required, can be applicable under the theater mode, to carry out inhomogeneous piecemeal light modulation as required, thereby realize that black completely of black area shows, promote image quality and contrast, simplify the design of light adjusting circuit, saved the design and running cost.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the light-dimming method of a direct-light type LED backlight module is characterized in that, said method comprising the steps of:
In advance backlight area is divided into plurality of sub-regions;
LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
2. the light-dimming method of direct-light type LED backlight module as claimed in claim 1 is characterized in that, the described step that in advance backlight area is divided into plurality of sub-regions is specially:
In advance backlight area is divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at the picture background zone of the left and right sides, picture central area;
The described step that each the regional interior LED that divides is carried out inhomogeneous piecemeal light modulation is specially:
According to degree from fine to coarse the LED in picture central area, picture background zone and the black region is carried out inhomogeneous piecemeal light modulation.
3. the light-dimming method of direct-light type LED backlight module as claimed in claim 2, it is characterized in that, describedly in advance backlight area is divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at after the step in picture background zone of the left and right sides, picture central area further comprising the steps of:
In the picture central area, picture background zone and black region be provided with a plurality of blocks respectively, the block area in the picture central area is less than the block area in the picture background zone, the block area in the picture background zone is less than the block area in the black region.
4. the light-dimming method of direct-light type LED backlight module as claimed in claim 2 is characterized in that, described degree according to from fine to coarse is specially the step that the LED in picture central area, picture background zone and the black region carries out inhomogeneous piecemeal light modulation:
According to degree from fine to coarse the LED in picture central area, picture background zone and the black region is carried out inhomogeneous piecemeal light modulation by SPI, IIC or PWM mode.
5. as the light-dimming method of each described direct-light type LED backlight module in the claim 2 to 4, it is characterized in that the height of described black region is 1/9 of a whole LED module height backlight, width is identical with whole LED module width backlight;
The height of described picture central area is 7/9 of a whole LED module height backlight, and width is 3/4 of a whole LED module width backlight;
The height in described picture background zone is 7/9 of a whole LED module height backlight, and width is 1/8 of a whole LED module width backlight.
6. the light-dimming method of direct-light type LED backlight module as claimed in claim 5 is characterized in that,
The height of the even block in the described black region is 1/9 of a whole LED module height backlight, and width is 1/3 of a whole LED module width backlight;
The height of the even block in the described picture central area is 7/27 of a whole LED module height backlight, and width is 3/32 of a whole LED module width backlight;
The height of the even block in the described picture background zone is 7/27 of a whole LED module height backlight, and width is 1/8 of a whole LED module width backlight.
7. the light adjusting system of a direct-light type LED backlight module is characterized in that, described system comprises:
First is provided with module, is used in advance backlight area being divided into plurality of sub-regions;
Light-adjusting module is used for the LED in each sub regions of dividing is carried out inhomogeneous piecemeal light modulation.
8. the light adjusting system of direct-light type LED backlight module as claimed in claim 7 is characterized in that,
Described first is provided with module, specifically be used in advance backlight area being divided into the picture central area, be positioned at the picture central area up and down both sides black region and be positioned at the picture background zone of the left and right sides, picture central area;
Described light-adjusting module specifically is used for according to degree from fine to coarse the LED in picture central area, picture background zone and the black region being carried out inhomogeneous piecemeal light modulation.
9. the light adjusting system of direct-light type LED backlight module as claimed in claim 8 is characterized in that, described system also comprises:
Second is provided with module, be used in the picture central area, picture background zone and black region be provided with a plurality of blocks respectively, block area in the picture central area is less than the block area in the picture background zone, and the block area in the picture background zone is less than the block area in the black region.
10. a televisor is characterized in that, comprises the light adjusting system of each described direct-light type LED backlight module in the claim 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105633835A CN101989408B (en) | 2010-11-29 | 2010-11-29 | Light modulation method and system and television of bottom lighting LED (Light-Emitting Diode) back light module group |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105633835A CN101989408B (en) | 2010-11-29 | 2010-11-29 | Light modulation method and system and television of bottom lighting LED (Light-Emitting Diode) back light module group |
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| CN101989408B CN101989408B (en) | 2012-05-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240650A (en) * | 2014-08-28 | 2014-12-24 | 青岛海信电器股份有限公司 | Backlight source luminance control method and device used under wide-screen film display mode |
| CN109192146A (en) * | 2018-10-12 | 2019-01-11 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN111654683A (en) * | 2020-06-05 | 2020-09-11 | 中影巴可（北京）电子有限公司 | Film playing method for improving picture uniformity |
-
2010
- 2010-11-29 CN CN2010105633835A patent/CN101989408B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240650A (en) * | 2014-08-28 | 2014-12-24 | 青岛海信电器股份有限公司 | Backlight source luminance control method and device used under wide-screen film display mode |
| CN109192146A (en) * | 2018-10-12 | 2019-01-11 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN111654683A (en) * | 2020-06-05 | 2020-09-11 | 中影巴可（北京）电子有限公司 | Film playing method for improving picture uniformity |
| CN111654683B (en) * | 2020-06-05 | 2021-12-07 | 中影巴可（北京）电子有限公司 | Film playing method for improving picture uniformity |
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| CN101989408B (en) | 2012-05-30 |
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