Backlight control unit and display device using same and backlight control method
AssigneesHon Hai Precision Industry Co., Ltd., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
InventorXIN GUO
Life of this patent
Estimating the term…
Abstract
A backlight control unit for a display device includes a processing unit and a backlight control circuit. The display device includes a plurality of lamps and defines a plurality of display regions each display region being illuminated by at least one lamp. When the processing unit determines that one or more display regions on the display device are constantly displaying a black image, the processing unit outputs a control signal to the backlight control circuit. The backlight control circuit turns off the lamps serving the one or more display regions displaying the black image, based on the control signal.
Claims12
A backlight control unit for a display device, the display device comprising a plurality of lamps and defining a plurality of display regions, each display region corresponding to at least one lamp, the backlight control unit comprising:
- a processing unit configured to determine which display regions constantly display a black image, based on pixel data applied to the plurality of display regions;
- and
- a backlight control circuit configured to control turn-on and turn-off of the plurality of lamps, based on a determination of the processing unit;
- wherein the lamps which do not serve any display regions displaying the black image are maintained in an on state, while the lamps serving the display regions which are displaying the black image are turned off by the backlight control circuit, based on the determination.
A display device, comprising:
- a plurality of lamps;
- a display panel defining a plurality of display regions, each display region on the display panel corresponding to at least one lamp;
- and
- a backlight control unit, comprising:
- a processing unit configured to determine which display regions on the display panel constantly display a black image, based on pixel data applied to the plurality of display regions;
- and
- a backlight control circuit configured to control turn-on and turn-off of the plurality of lamps, based on a determination of the processing unit;
- wherein the lamps which do not serve any display regions displaying the black image are maintained in an on state, while the lamps serving the display regions which are displaying the black image are turned off by the backlight control circuit, based on the determination.
A backlight control method, comprising:
- providing a display device, the display device defining a plurality of display regions and comprising a plurality of lamps, each display region corresponding to at least one lamp;
- receiving pixel data applied to the plurality of display regions of the display device;
- determining which display regions on the display device constantly display a black image based on the pixel data;
- maintaining the lamps which do not serve any display regions displaying the black image in an on state, while turning off the lamps serving the display regions which are displaying the black image, based on the determination.
Dependencies are inferred from the claim text.