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Light-generating device

A light-emitting device and equipment technology, which is applied in the direction of lighting and heating equipment, light sources, semiconductor devices of light-emitting elements, etc., can solve the problems that the front-side light-emitting part is not protected in this way, and the LED is easily damaged.

Inactive Publication Date: 2009-07-01
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, LEDs are relatively easy to damage
The MCPCB can provide mechanical protection to the back of the LED mounted on it, but the part that emits light from the front is not so protected

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] figure 1 The design of a lighting device 1 according to the invention is schematically represented, and the manufacturing process for producing the device is also shown.

[0018] A screen printed prepreg 3 is placed on the front surface 7 of the MCPCB 2 . Since screen printing prepregs and MCPCBs are known per se, and at the same time, the method of placing prepregs on MCPCBs is also known per se, furthermore, the methods of making prepregs and MCPCBs in the prior art Methods can be used to practice the invention and therefore will not be described in detail here. It is sufficiently shown that the size of the prepreg 3 is smaller than that of the MCPCB 2, and that the prepreg 3 is placed in the central portion of the MCPCB 2 so as to surround the prepreg 3, leaving a ring-shaped portion at the front surface 7 of the MCPCB 2 9.

[0019] The high-power LED light source device 4 is placed on the prepreg 3 . Since the LED device is known per se, the method of arranging ...

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PUM

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Abstract

A light-generating device (1; 11) comprises at least one LED light source device (4) mounted on a front surface (7) of an MCPCB (2). The light-generating device (1; 11) further comprising a body (5) of open-cell metal foam, having a back surface (8) and a chamber (6) recessed in its back surface (8), the back surface (8) of the body (5) of open-cell metal foam being attached to the front surface (7) of the MCPCB (2) with the LED light source device (4) being arranged in the said chamber (6). The metal foam (5) preferably is aluminium, like the MCPCB (2). The metal foam (5) contributes substantially to the heat sinking and cooling of the device, effectively causes the output light to be diffused and become more homogenous, and provides a mechanical protection for the front side of the LED.

Description

technical field [0001] The present invention generally relates to lighting devices comprising at least one high power LED light source. Background technique [0002] The use of high power light emitting diodes (LEDs) is well known in lighting, especially but not exclusively white LEDs. Heat dissipation is also a notoriously important issue for such devices. For this reason, it is also known to mount LED structures on a metal core printed circuit board (MCPCB) on which there is electrical insulation between the printed circuit and the aluminum core. The LED structure is mounted in heat transfer relationship with the aluminum core so that the core acts as a heat sink. [0003] It is an object of the present invention to improve this design to enhance heat dissipation. [0004] In general, LEDs are bright, high-brightness, point sources of light, but these characteristics are not always required for lighting purposes, and a more diffuse light output is required. It is there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V3/04F24F3/056H01L33/64F21K99/00
CPCF24F13/078F21V3/04F21K9/00F21Y2115/10
Inventor O·范特特霍伦T·H·斯托门
Owner KONINK PHILIPS ELECTRONICS NV