LED AUTOMOBILE HEADLAMP

• US 20150354776A1
• Filed: 07/25/2012
• Published: 12/10/2015
• Est. Priority Date: 07/25/2012
• Status: Active Grant

• Current Assignee: Shenzhen Yike Electrooptical Technology Co., Ltd.
• Original Assignee: Shenzhen Yike Electrooptical Technology Co., Ltd.
• Inventors: Lai, Yisong
• Granted Patent: US 9,476,564 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21S 41/192 Details of lamp holders, terminals or connectors
• CPC Class Codes: F21S 45/43 using gas
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21S 45/49 Attachment of the cooling means
• CPC Class Codes: F21S 45/50 Waterproofing
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED automobile headlamp includes an LED lamp positioned on a substrate (100); a heat conducting member (200) having a strip shape, with the substrate (100) being fixed to an end of the heat conducting member (200), and the heat conducting member (200) being internally filled with a low-boiling liquid; and a heat dissipating member (300), including a heat dissipating cylinder (320) and a plurality of heat dissipating fins (340), wherein the heat dissipating cylinder (320) defines a through hole to receive the heat conducting member (200), and the plurality of heat dissipating fins (340) are fixed to a periphery of an end of the heat dissipating cylinder (320) away from the substrate. The LED automobile headlamp uses an LED lamp instead of the traditional tungsten filament and HID, and transmits the heat generated by the LED lamp to the rear end by means of the circulation of the low-boiling liquid in the heat conducting member (200), and then uses the heat dissipating member (300) to dissipate heat.

Claims

1. An LED automobile headlamp, comprising:

an LED lamp positioned on a substrate;

a heat conducting member having a strip shape, the substrate being fixed to an end of the heat conducting member, and the heat conducting member being internally filled with a low-boiling liquid; and

a heat dissipating member comprising a heat dissipating cylinder and a plurality of heat dissipating fins, wherein the heat dissipating cylinder defines a through hole to receive the heat conducting member, and the plurality of heat dissipating fins are fixed to a periphery of an end of the heat dissipating cylinder away from the substrate.

2. The LED automobile headlamp according to claim 1, further comprising an retaining member sleeved on the heat dissipating cylinder configured to secure the heat dissipating member provided with the LED lamp to a lamp holder of an automobile headlamp assembly.

3. The LED automobile headlamp according to claim 2, wherein the retaining member comprises a connecting portion having a cylindrical shape and a bayonet, the connecting portion is sleeved on the heat dissipating cylinder, and the bayonet radially protrudes from an outer sidewall of the connecting portion, the bayonet is configured to be latched with the lamp holder of the automobile headlamp assembly of a corresponding lamp type, and a distance between the bayonet and a luminous point of the LED lamp meets the focal distance standard of automobile lamps.

4. The LED automobile headlamp according to claim 3, wherein the heat conducting member comprises a heat conductive platform and a heat conductive pipe, the substrate is fixed to an end surface or a side surface of an end of the heat conductive platform, the other end or an inner hole of the heat conductive platform is connected to the heat conductive pipe, and the heat conductive pipe is received in the through hole.

5. The LED automobile headlamp according to claim 3, further comprising a waterproof member positioned on the retaining member, wherein the waterproof member is received in a groove defined on the retaining member, and the waterproof member is positioned on a side of the bayonet facing the LED lamp.

6. The LED automobile headlamp according to claim 1, further comprising a control module and a temperature sensor, wherein the temperature sensor is positioned on the substrate and is configured to sense a temperature of the LED lamp;

the heat dissipating member further comprises a fan in contact with the plurality of heat dissipating fins and opposite to the heat conducting member;

the control module controls the fan to work in accordance with the temperature.

7. The LED automobile headlamp according to claim 6, wherein the plurality of heat dissipating fins define a receiving groove on a side thereof coaxial with the heat conducting member and away from the substrate to receive the fan.

8. The LED automobile headlamp according to claim 1, wherein the heat conducting member is provided with capillaries on an inner sidewall thereof.

9. The LED automobile headlamp according to claim 2, wherein the heat dissipating cylinder comprises a first segment and a second segment sleeved with each other, the retaining member is sleeved on an end of the second segment adjacent to the first segment, and the heat dissipating fins are positioned on an end of the second segment away from the first segment.

10. The LED automobile headlamp according to claim 9, wherein the first segment is threadedly connected to the second segment through a sleeve.