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US 9,311,863 B2Granted
Dimming method and dimming device for backlight module
AssigneeNovatek Microelectronics Corp.
InventorsHsing-Chuan Chen, Wen-Chi Lin
Life of this patent
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Abstract
A dimming method and dimming device for a backlight module are provided. The dimming method includes the following steps. Light distribution information of a plurality of light sources of the backlight module corresponding to a display panel is provided. According to the light distribution information of each of the light sources, a plurality of light contribution ratios of the light sources corresponding to a plurality of different positions of the display panel are obtained respectively. According to the light contribution ratios corresponding to the different positions, the needed intensity of each of the light sources is determined respectively.
Claims38
A dimming method for a backlight module, comprising:
- according to a plurality of light distribution information of a plurality of light sources of the backlight module which are corresponding to each of different positions of the display panel, respectively obtaining a plurality of light contribution ratios of the light sources corresponding to the different positions of the display panel;
- and
- according to the light contribution ratios corresponding to the different positions, respectively determining a needed intensity of each of the light sources,
- wherein, the step of determining the needed intensity of each of the light sources comprises:
- (i) for each of the different positions of the display panel and while satisfying a target brightness value of the position, respectively obtaining possible needed intensities of at least two selected light sources according to the light contribution ratio obtained at the position;
- and
- (ii) for each of the light sources, determining the needed intensity of the light source according to the possible needed intensities of the light source respectively obtained for the different positions.
4 more elements
A dimming method for a backlight module, comprising:
- providing a light distribution information of a plurality of light sources of the backlight module corresponding to a display panel;
- at each of a plurality of pixels of the display panel, respectively obtaining a light contribution ratio of at least two selected light sources in the plurality of light sources according to the light distribution information of the at least two selected light sources corresponding to the pixel;
- for each of the different positions of the display panel and while satisfying a target brightness value of the position, respectively obtaining a possible needed intensity of the at least two selected light sources according to the light contribution ratio obtained at the position;
- and
- for each of the light sources, determining a needed intensity of the light source according to the possible needed intensities of the light source respectively obtained for the different positions.
2 more elements
A dimming device for a backlight module, comprising:
- a database providing a plurality of light distribution information of a plurality of light sources of the backlight module corresponding to a display panel;
- and
- a dimming circuit coupled to the database, wherein according to the plurality of light distribution information of the light sources which are corresponding to each of different positions of the display panel, the dimming circuit respectively obtains a plurality of light contribution ratios of the light sources corresponding to the different positions of the display panel, and according to the light contribution ratios corresponding to the different positions, the dimming circuit respectively determines a needed intensity of each of the light sources,
- wherein for each of the different positions of the display panel and while satisfying a target brightness value of the position, the dimming device respectively obtains possible needed intensities of at least two selected light sources in the light sources according to the light contribution ratio obtained at the position;
- and for each of the light sources, the dimming circuit determines the needed intensity of the light source according to the possible needed intensities of the light source respectively obtained for the different positions.
2 more elements
A dimming device for a backlight module, comprising:
- a database providing a light distribution information of a plurality of light sources of the backlight module corresponding to a display panel;
- a dimming circuit coupled to the database, wherein at each of a plurality of pixels of the display panel, the dimming circuit respectively obtains a light contribution ratio of at least two selected light sources in the plurality of light sources according to the light distribution information of the at least two selected light sources corresponding to the pixel;
- for each of the different positions of the display panel and while satisfying a target brightness value of the position, the dimming circuit respectively obtains a possible needed intensity of the at least two selected light sources according to the light contribution ratio obtained at the position;
- and for each of the light sources, the dimming circuit determines a needed intensity of the light source according to the possible needed intensities of the light source respectively obtained for the different positions.
1 more element
Dependencies are inferred from the claim text.