Backlight unit, display apparatus comprising the same and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorYoung-kook Kim
Life of this patent
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Abstract
A display apparatus including a liquid crystal display (LCD) panel, a light source unit including a plurality of point light sources to provide light to the LCD panel and divided into a plurality of light source areas, a plurality of light source driving parts to supply electric power to the plurality of light source areas, a brightness sensor to sense a brightness of the light source unit, and a light source controller to control the light source driving part based on the brightness sensed by the brightness sensor so that the light source unit provides light of uniform brightness.
Claims29
A display apparatus, comprising:
- a liquid crystal display panel;
- a light source unit comprising a plurality of point light sources to provide light to the liquid crystal display panel and divided into a plurality of light source areas;
- a plurality of light source driving parts to supply electric power to corresponding ones of the plurality of light source areas;
- a brightness sensor disposed on each light source area of the plurality of light source areas to sense a brightness of the light source unit;
- and
- a light source controller to control the plurality of light source driving parts based on the brightness sensed by the brightness sensor so that the light source unit provides light of uniform brightness.
A backlight unit, comprising:
- a light source unit comprising a plurality of point light sources and divided into a plurality of light source areas;
- a plurality of light source driving parts to supply electric power to corresponding ones of the plurality of light source areas;
- a brightness sensor disposed on each light source area of the plurality of light source areas to sense a brightness of the light source unit;
- and
- a light source controller to control the light source driving part based on the brightness sensed by the brightness sensor so that the light source unit provides light of uniform brightness.
A control method of a display apparatus
- including an LCD panel, a light source unit comprising a plurality of point light sources to provide light to the LCD panel and divided into a plurality of light source areas, a plurality of light source driving parts to supply electric power to corresponding ones of the plurality of light source areas, and a brightness sensor disposed on each light source area of the plurality of light source areas to sense a brightness of the light source unit, the control method comprising:
- sensing an actual brightness of each of the plurality of light source areas;
- and
- supplying light of uniform brightness based on the sensed brightness.
A backlighting unit to transmit light to an image display device, comprising:
- a light source unit comprising a plurality of light source areas;
- a plurality of brightness sensors located on corresponding areas of the plurality of light source areas to determine an actual brightness of each of the plurality of light source areas;
- and
- a power supply control unit to control an amount of power supplied to each of the light source areas independently based on the determined actual brightness.
A method of controlling a backlighting unit comprising a light source unit comprising first and second light source areas, first and second pluralities of light sources respectively located on the first and second light source areas, and first and second brightness sensors respectively located on the first and second light source areas to determine an actual brightness of the first and second light source areas, the method comprising:
- determining an average brightness of the light source unit;
- calculating a difference between the average brightness and the actual brightness of the first light source area;
- and
- controlling a supply of electric power to the first light source area based on first brightness data corresponding to the difference between the average brightness and the actual brightness of the first light source area.
A direct type backlight unit, comprising:
- a light source divided into a plurality of light source areas;
- and
- a brightness sensor disposed on each light source area of the plurality of light source areas,
- wherein the brightness sensor detects an actual brightness of a corresponding light source area.
A display apparatus, comprising:
- a screen;
- a light source unit which is divided into a plurality of light source areas, the light source unit comprising a plurality of LEDs;
- a plurality of light source driving parts which supplies electric power to the light source unit;
- a plurality of brightness sensors which senses a brightness of the light source unit;
- and
- a light source controller which controls the plurality of light source driving parts based on the brightness sensed by the brightness sensors;
- wherein the screen is divided into a plurality of areas and the plurality of the light source areas provide light to the corresponding areas of the divided screen.
A display apparatus, comprising:
- a light source unit which is divided into a plurality of light source areas, the light source unit comprising a plurality of LEDs;
- a plurality of light source driving parts which supplies electric power to the light source unit;
- a plurality of brightness sensors which senses a brightness of the light source unit;
- and
- a light source controller to control the plurality of light source driving parts respectively based on the brightness sensed by the brightness sensors.
Dependencies are inferred from the claim text.