Heat dissipation pipe loop and backlight module using same

Patent metadata

Field	Value
Publication number	US-2015138830-A1
Application number	US-201314129982-A
Country	US
Kind code	A1
Filing date	Nov 28, 2013
Priority date	Nov 19, 2013
Publication date	May 21, 2015
Grant date	—

Abstract

The present invention provides a heat dissipation pipe loop and a backlight module using the heat dissipation pipe loop. The heat dissipation pipe loop includes: a first evaporator section ( 2 ), a second evaporator section ( 4 ) arranged opposite to the first evaporator section ( 2 ), a first pipe ( 6 ), a second pipe ( 8 ) arranged opposite to the first pipe ( 6 ), and a heat dissipation liquid arranged in the first pipe ( 6 ) and the second pipe ( 8 ). The first pipe ( 6 ) includes a first gas pipe ( 62 ) connected to the first evaporator section ( 2 ), a first condenser pipe ( 64 ) connected to the first gas pipe ( 62 ), and a first liquid pipe ( 66 ) connected to the first condenser pipe ( 64 ) and the second evaporator section ( 4 ). The second pipe ( 8 ) includes a second gas pipe ( 82 ) connected to the second evaporator section ( 4 ), a second condenser pipe ( 84 ) connected to the second gas pipe ( 82 ), and a second liquid pipe ( 86 ) connected to the second condenser pipe ( 84 ) and the first evaporator section ( 2 ).

First claim

What is claimed is:

1 . A heat dissipation pipe loop, comprising: a first evaporator section, a second evaporator section arranged opposite to the first evaporator section, a first pipe connected to the first evaporator section and the second evaporator section, a second pipe connected to the first evaporator section and the second evaporator section and arranged opposite to the first pipe and a heat dissipation liquid arranged in the first pipe and the second pipe, the first evaporator section, the first pipe, the second evaporator section, and the second pipe being sequentially connected in a tail end to leading end manner so as to form a closed loop, the first pipe comprising a first gas pipe connected to the first evaporator section, a first condenser pipe connected to the first gas pipe, and a first liquid pipe connected to the first condenser pipe and the second evaporator section, the second pipe comprising a second gas pipe connected to the second evaporator section, a second condenser pipe connected to the second gas pipe, and a second liquid pipe connected to the second condenser pipe and the first evaporator section.

2 . The heat dissipation pipe loop as claimed in claim 1 , wherein the first evaporator section comprises a first compensation chamber adjacent to the second liquid pipe, a first liquid chamber arranged frontward of the first compensation chamber, a first stop plate arranged frontward of the first liquid chamber, a first capillary body mounted on the first stop plate, a first gas passage arranged above the first capillary body, and a first heat transfer layer arranged above the first gas passage and the second evaporator section comprises a second compensation chamber adjacent to the first liquid pipe, a second liquid chamber arranged frontward of the second compensation chamber, a second stop plate arranged frontward of the second liquid chamber, a second capillary body mounted on the second stop plate, a second gas passage arranged above the second capillary body, and a second heat transfer layer arranged above the second gas passage.

3 . The heat dissipation pipe loop as claimed in claim 1 , wherein the heat dissipation liquid is composed of water, Freon refrigerant, ammonia, and methanol.

4 . The heat dissipation pipe loop as claimed in claim 1 , wherein the first pipe and the second pipe are made of at least one of copper and titanium.

5 . A backlight module that uses a heat dissipation pipe loop, comprising: a backplane, a light guide plate mounted in the backplane, two backlight sources mounted in the backplane, a heat dissipation pipe loop arranged between the backplane and the backlight sources, and a reflector plate arranged between the backplane and the light guide plate, the heat dissipation pipe loop comprising: a first evaporator section, a second evaporator section arranged opposite to the first evaporator section, a first pipe connected to the first evaporator section and the second evaporator section, a second pipe connected to the first evaporator section and the second evaporator section and arranged opposite to the first pipe and a heat dissipation liquid arranged in the first pipe and the second pipe, the first evaporator section, the first pipe, the second evaporator section, and the second pipe being sequentially connected in a tail end to leading end manner so as to form a closed loop, the first pipe comprising a first gas pipe connected to the first evaporator section, a first condenser pipe connected to the first gas pipe, and a first liquid pipe connected to the first condenser pipe and the second evaporator section, the second pipe comprising a second gas pipe connected to the second evaporator section, a second condenser pipe connected to the second gas pipe, and a second liquid pipe connected to the second condenser pipe and the first evaporator section, the two backlight sources being respectively arranged on the first evaporator section and the second evaporator section.

6 . The backlight module that uses the heat dissipation pipe loop as claimed in claim 5 , wherein the first evaporator section comprises a first compensation chamber adjacent to the second liquid pipe, a first liquid chamber arranged frontward of the first compensation chamber, a first stop plate arranged frontward of the first liquid chamber, a first capillary body mounted on the first stop plate, a first gas passage arranged above the first capillary body, and a first heat transfer layer arranged above the first gas passage and the second evaporator section comprises a second compensation chamber adjacent to the first liquid pipe, a second liquid chamber arranged frontward of the second compensation chamber, a second stop plate arranged frontward of the second liquid chamber, a second capillary body mounted on the second stop plate, a second gas passage arranged above the second capillary body, and a second heat transfer layer arranged above the second gas passage.

7 . The backlight module that uses the heat dissipation pipe loop as claimed in claim 6 , wherein each of the backlight sources comprises a printed circuit board and a plurality of LED (Light-Emitting Diode) lights mounted to and electrically connected with the printed circuit board, the two printed circuit boards of the two backlight sources being respectively and directly positioned against the first heat transfer layer and the second heat transfer layer.

8 . The backlight module that uses the heat dissipation pipe loop as claimed in claim 5 , wherein the heat dissipation liquid is composed of water, Freon refrigerant, ammonia, and methanol.

9 . The backlight module that uses the heat dissipation pipe loop as claimed in claim 5 , wherein the first pipe and the second pipe are made of at least one of copper and titanium.

10 . The backlight module that uses the heat dissipation pipe loop as claimed in claim 7 , wherein the backplane comprises a bottom board and a plurality of side boards perpendicularly connected to the bottom board, the bottom board comprising a first bottom board section and two second bottom board sections that are arranged to each show a stepped connection with the first bottom board section, the printed circuit boards and the first evaporator section and the second evaporator section of the heat dissipation pipe loop being arranged on the second bottom board sections, upper surfaces of the printed circuit boards being substantially flush with an upper surface of the first bottom board section.

11 . A backlight module that uses a heat dissipation pipe loop, comprising: a backplane, a light guide plate mounted in the backplane, two backlight sources mounted in the backplane, a heat dissipation pipe loop arranged between the backplane and the backlight sources, and a reflector plate arranged between the backplane and the light guide plate, the heat dissipation pipe loop comprising: a first evaporator section, a second evaporator section arranged opposite to the first evaporator section, a first pipe connected to the first evaporator section and the second evaporator section, a second pipe connected to the first evaporator section and the second evaporator section and arranged opposite to the first pipe band a heat dissipation liquid arranged in the first pipe and the second pipe, the first evaporator section, the first pipe, the second evaporator section, and the second pipe being sequentially connected in a tail end to leading end manner so as to form a closed loop, the first pipe comprising a first gas pipe connected to the first evaporator section, a first condenser pipe connected to the first gas pipe, and a first liquid pipe connected to the first condenser pipe and the second evaporator section, the

Assignees

• Shenzhen China Star Optoelect

Inventors

• Yu Gang

Classifications

• F21V29/503

  of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) · CPC title

• F21Y2101/02

  Mechanical Engineering · mapped topic

• F21V29/51

  using condensation or evaporation of a fluid, e.g. heat pipes · CPC title

• G02F1/1336

  Illuminating devices · CPC title

• F28D15/043 Primary

  forming loops, e.g. capillary pumped loops · CPC title