公告(公開)號

US7481567

專利名稱

Backlight assembly and liquid crystal display device using the same

申請日

公告日

2006/01/20

2009/01/27

申請人（國家）

Samsung Electronics Co., Ltd.

摘要

A backlight assembly and a liquid crystal display device can discharge heat from the lamp unit to the outside or effectively dissipate the heat. The backlight assembly of the present invention includes a lamp unit, a receiving member for receiving the lamp unit, a first heat dissipation member disposed below the receiving member, and a second heat dissipation for wrapping around a lateral side of the receiving member and the first heat dissipation member. The lamp unit is disposed on an area corresponding to the lateral side of the receiving member. In one embodiment, the first heat dissipation member is a flat plate made of graphite and disposed on an outer side of the bottom of the receiving member. The second heat dissipation member is metal with good thermal conductivity in close contact with the first heat dissipation member and the lateral side of the receiving member where the lamp unit is disposed. Thus, the heat discharged from the lamp unit can be distributed uniformly over the entire area of the receiving member. In addition, the lateral side of the receiving member where the lamp unit is disposed can be replaced with the second heat dissipation member.

專利範圍第一項或其他相關之專利範圍

1. A backlight assembly, comprising: a light source; a receiving member having a rectangular shape comprising a bottom plate and four sidewalls extending from respective sides of the bottom plate, the receiving member having an inner surface and an outer surface, the receiving member receiving the light source, the light source being adjacent to the inner surface of one of the sidewalls; a first heat dissipation member disposed on the outer surface of the bottom plate of the receiving member; and a second heat dissipation member disposed on the outer surface of the one of the sidewalls of the receiving member and on the first heat dissipation member.

2. The backlight assembly as claimed in claim 1, wherein the first heat dissipation member comprises a flat plate disposed on a portion of the bottom plate, the portion of the bottom plate being adjacent to the light source.
3. The backlight assembly as claimed in claim 2, wherein the first heat dissipation member includes copper, copper alloy, or graphite, and the second heat dissipation member includes copper or copper alloy.

公告(公開)號

US7520637

專利名稱

Backlight unit and liquid crystal display device

申請日

公告日

2005/10/31

2009/04/21

申請人（國家）

LG Display Co., Ltd.

摘要

A backlight unit and an LCD device are provided, in which an LED (light emitting diode) is used as a light source of the backlight unit, and the heat generated from the LED is rapidly discharged to the outside. The backlight unit includes in one embodiment a cover bottom; at least one heat pipe located on the cover bottom; and a plurality of light sources located on the at least one heat pipe at fixed intervals.

專利範圍第一項或其他相關之專利範圍

1. A backlight unit comprising: a cover bottom; at least one heat pipe located on the cover bottom, wherein the at least one heat pipe includes a first plate and a second plate facing each other, a first wick on a surface of the first plate facing an opposite surface of the second plate and a second wick on the opposite surface of the second plate, and a sealing layer for providing a sealed space between the first and second plates and a working fluid being in the sealed space between the first and second plates, wherein the first plate and the second plate are made of copper and the working fluid is made of water; and a plurality of LEDs (light emitting diodes) located on the at least one heat pipe at fixed intervals.

2. The backlight unit of claim 1, wherein the plurality of LEDs include red R, green G and blue B light emitting diodes.

7. The backlight unit of claim 1, further comprising: a reflecting sheet for reflecting light emitted from the LEDs; and a graphite spreader, located on a bottom surface of the reflecting sheet, for discharging heat generated from the LEDs.

8. The backlight unit of claim 7, wherein the graphite spreader surrounds at least one of the LEDs, the heat generated by at least one of the LEDs being conducted to the graphite spreader.

公告(公開)號

EP2063174

專利名稱

BACKLIGHT DEVICE AND DISPLAY DEVICE USING SAME

申請日

公告日

2006/09/13

2009/05/27

申請人（國家）

SHARP KK [JP]

摘要

A backlight device (3) is provided with a substrate (9) whereupon a plurality of light emitting diodes (10) are arranged, and a lower side chassis (heat dissipating unit) (6) where heat generated by the light emitting diodes (10) is transferred from the substrate (9) and dissipated to the outside. An amount of heat generated by each light emitting diode (10) is measured in advance, and in accordance with the measurement results of the amounts of generated heat, an arrangement position on the substrate (9) is determined and corresponding light emitting diodes (10) are arranged.

專利範圍第一項或其他相關之專利範圍

1. A backlight device provided with a plurality of light emitting diodes, the back light device comprising:
a substrate on which the light emitting diodes have been arranged; and
a heat dissipating unit to which heat generated by the light emitting diodes is transferred from the substrate, and that dissipates the heat to the outside,wherein an amount of heat generated by each of the plurality of light emitting diodes is measured in advance, and an arrangement position of each of the plurality of light emitting diodes on the substrate is determined in accordance with the measurement results of the amounts of generated heat.

2. The backlight device according to claim 1, wherein a metallic material having heat conductivity is used in the substrate.

公告(公開)號

US7527408

專利名稱

Backlight unit having heat dissipating layer, display device having heat dissipating layer, and method for manufacturing heat dissipating layer

申請日

公告日

2006/08/21

2009/05/05

申請人（國家）

LG Electronics Inc.

摘要

A backlight unit and a display device having heat dissipating layer, and a method for manufacturing the heat dissipating layer are provided. A backlight unit includes a light source for emitting a light; a reflector below the light source for reflecting the light emitted from the light source and absorbing heat generated by the light source; and a heat dissipating layer including thermal conductive particles, the heat dissipating layer being disposed on a first surface of the reflector for dissipating the heat transferred to the reflector.

專利範圍第一項或其他相關之專利範圍

1. A backlight unit, comprising: a light source for emitting a light; a reflector below the light source for reflecting the light emitted from the light source and absorbing heat generated by the light source; a heat dissipating layer including thermal conductive particles, the heat dissipating layer being disposed on and in direct contact with a first surface of the reflector for dissipating the heat transferred to the reflector; a light guide plate for guiding the light emitted from the light source, the light source being located at least one lateral side of the light guide plate; and a light source reflector above the reflector and surrounding the light source, wherein the reflector and the heat dissipating layer have a length larger than a length of the light guide plate and are disposed directly below the light source reflector for absorbing the heat transferred to the light source reflector.

8. The backlight unit of claim 1, wherein the light source is at least one of a cold cathode fluorescent lamp (CCFL), a light emitting diode (LED) and an external electrode fluorescent lamp (EEFL).