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US 2019/0295479 A1Published application
Image display apparatus capable of improving contrast
AssigneeLG Electronics Inc.
InventorsByunghyun AN, Hyungoon KIM, Kanghyun YOON, Gwangmi GO
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Abstract
An image display apparatus is disclosed. The image display apparatus includes a panel, a plurality of light sources to output light to the panel, a plurality of switching elements to switch the light sources, and a processor to control the switching elements, wherein the processor controls a current having a variable level to flow into each light source string among the light sources, based on local dimming data, thereby improving contrast in displaying images.
Claims20
An image display apparatus, comprising:
- a panel;
- a plurality of light sources to output light to the panel;
- a plurality of switching elements to switch the light sources;
- and
- a processor to control the switching elements,
- wherein the processor controls a current to flow into each light source string among the light sources, based on local dimming data,
- wherein, if a level of first local dimming data corresponding to a first region in the panel is equal to or higher than a first reference level, the processor controls a first current having a variable level to flow into a light source string of a location corresponding to the first region.
4 more elements
An image display apparatus, comprising:
- a panel;
- a plurality of light sources to output light to the panel;
- a plurality of switching elements to switch the light sources;
- and
- a processor to control the switching elements,
- wherein, if a level of local dimming data is equal to or higher than a first reference level, the processor controls a current having a variable level to flow into each light source string among the light sources as a first mode, based on the local dimming data,
- if the level of the local dimming data is lower than the first reference level, the processor controls a current having a constant level and a variable pulse width to flow into each light source string among the light sources as a second mode, based on the local dimming data,
- wherein, if a level of first local dimming data corresponding to a first region in the panel is equal to or higher than a first reference level, the processor controls a first current having a variable level to flow into a light source string of a location corresponding to the first region.
5 more elements
Dependencies are inferred from the claim text.