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US 7,741,784 B2Granted
Apparatus for driving a light source and liquid crystal display device using the same
AssigneeLG Display Co., Ltd.
InventorsSang Won Paeng, Sang Soo Han
Life of this patent
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Abstract
An apparatus for driving a light source and a liquid crystal display device using the same is disclosed. The apparatus for driving a light includes: a light source unit including a plurality of lamps to emit light; and a light source driving unit that selectively drives the plurality of lamps in response to a luminance control signal and a selection signal.
Claims6
A light source driving apparatus comprising:
- a light source unit including a plurality of lamps to emit light, wherein the plurality of lamps are divided into a plurality of lamp groups;
- and
- a light source driving unit that selectively drives the plurality of lamps in response to a luminance control signal and a selection signal, wherein the light source driving unit drives all the plurality of lamp groups for a maximum luminance, while the light source driving unit drives one of the plurality of lamp groups for a minimum luminance,
- wherein the light source driving unit includes:
- a plurality of inverters that each drive a respective one of the lamp groups,
- a plurality of inverter controllers that each control a respective one of the inverters, and
- a selector that selects between supplying inverter control signals simultaneously to the plurality of inverter controllers and supplying an inverter control signal to a respective one of the plurality of inverter controllers in response to the selection signal.
4 more elements
A liquid crystal display (LCD) device comprising:
- an LCD panel that displays images;
- a light source unit including a plurality of lamps to supply light to the LCD panel, wherein the plurality of lamps are divided into a plurality of lamp groups;
- and
- a light source driving unit that selectively drives the plurality of lamps in response to a luminance control signal and a selection signal, wherein the light source driving unit drives all the plurality of lamp groups for a maximum luminance, while the light source driving unit drives one of the plurality of lamp groups for a minimum luminance,
- wherein the light source driving unit includes:
- a plurality of inverters that each drive a respective lamp group of the plurality of the lamp groups,
- a plurality of inverter controllers that each control a respective inverter of the plurality of inverters, and
- a selector that selects between supplying inverter control signals simultaneously to the plurality of inverter controllers and supplying an inverter control signal to a respective one of the plurality of inverter controllers in response to the selection signal.
5 more elements
Dependencies are inferred from the claim text.