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US 8,282,228 B2Granted
Liquid crystal display device
AssigneeLG Display Co., Ltd.
InventorsDong Seo Park, Yeon Chae Hong
Life of this patent
Estimating the term…
Abstract
A display device capable of driving a scanning backlight is disclosed. The display device forms a conductive pattern on a balance printed circuit board (PCB) and sequentially controls the on/off time of light sources without assigning driving units to each of the light sources. As such, the display device can drive the scanning backlight and reduce manufacturing costs.
Claims19
A backlight unit, comprising:
- a plurality of light sources configured to generate light, and to correspond to a plurality of areas of a liquid crystal panel;
- at least one balance printed circuit board including
- a plurality of sockets, in which an end portion of the respective plurality of light sources is connected,
- a first conductive pattern configured to be located at a first or second side of the plurality of sockets corresponding to a center one of the plurality of areas,
- a second conductive pattern configured to be located at the second or the first side of the plurality of sockets corresponding to a remainder of the plurality of areas, and
- a connector configured to be electrically connected to the first and second conductive patterns;
- and
- first and second light source driving units supplying first and second light source driving voltages to the first and second conductive patterns, respectively, of the at least one balance printed circuit board
- wherein the first conductive pattern and the second conductive pattern are formed on the at least one balance printed circuit board.
6 more elements
A backlight unit, comprising:
- a plurality of light sources configured to generate light, and to correspond to a plurality of areas of a liquid crystal panel;
- at least one balance printed circuit board including
- a plurality of sockets, in which an end portion of the respective plurality of light sources is connected,
- a first conductive pattern configured to be located at a first or second side of the plurality of sockets corresponding to a center one of the plurality of areas,
- a second conductive pattern configured to be located at the second or the first side of the plurality of sockets corresponding to a remainder of the plurality of areas,
- a third conductive pattern configured to be located at a same side of the plurality of sockets corresponding to the remainder of the plurality of areas,
- a first connector configured to be electrically connected to the first and second conductive patterns, and
- a second connector configured to be electrically connected to the third conductive pattern;
- and
- a first light source driving unit supplying a first light source driving voltage to the first conductive pattern and the third conductive pattern via respectively the first and second connectors, and a second light source driving unit to supply a second light source driving voltage to the second conductive pattern via the first connector.
7 more elements
A backlight unit, comprising:
- a plurality of light sources configured to generate light, and to correspond to a plurality of areas of a liquid crystal panel;
- at least one balance printed circuit board including:
- a plurality of sockets, in which an end portion of the respective plurality of light sources is connected,
- a first conductive pattern configured to be located at a first or second side of the plurality of sockets corresponding to a center one of the plurality of areas,
- a second conductive pattern configured to be located at the second or the first side of the plurality of sockets corresponding to a remainder of the plurality of areas,
- a first connector configured to be electrically connected to the first conductive pattern, and
- a second connector configured to be electrically connected to the second conductive pattern;
- and
- a first light source driving unit supplying a first light source driving voltage to the first conductive pattern via the first connector, and
- a second light source driving unit supplying a second light source driving voltage to the second conductive pattern via the second connector
- wherein the first conductive pattern and the second conductive pattern are formed on the at least one balance circuit board.
8 more elements
Dependencies are inferred from the claim text.