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Side emitting light- emitting device

A technology of light-emitting devices and light collectors, applied in the field of lighting systems, can solve problems such as increasing the cost of lighting systems

Active Publication Date: 2010-09-08
PHILIPS LUMILEDS LIGHTING CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases the cost of lighting systems including existing light emitting devices

Method used

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  • Side emitting light- emitting device
  • Side emitting light- emitting device
  • Side emitting light- emitting device

Examples

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Embodiment Construction

[0014] Various embodiments of the present invention provide light emitting devices and lighting methods. The light emitting device provides uniform side emission in radial direction. Light emitting devices can also be used in combination with optical waveguides to create relatively thin lighting systems that provide uniform lighting.

[0015] FIG. 1 is a cross-sectional view of a light emitting device 100 according to one embodiment of the present invention. The section is taken along a plane parallel to the x-y plane (as shown in Figure 1). The light emitting device 100 may be, for example, a light emitting diode (LED). Light emitting device 100 includes one or more semiconductor layers 102 , a reflective bottom surface 104 , a top surface 106 , and a substrate 108 . Semiconductor layer 102 includes one or more active regions, such as active region 110 , having a central plane 112 . The light emitting device 100 is mounted on the submount 114 . According to various embod...

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Abstract

The invention provides a light-emitting device and a method of illumination. The light-emitting device includes one or more semiconductor layers, a reflective bottom surface, and a top surface coupled to semiconductor layer. The semiconductor layers include an active region where a primary light is generated. The relative position of the top surface, the reflective bottom surface and the active region is adjusted to substantially transmit the primary light through the sides of the light-emitting device.

Description

Background technique [0001] The present invention relates generally to the field of lighting systems, and more particularly to light emitting devices with uniform side emission in radial direction. Light emitting devices are widely used for backlighting of display devices such as laptop computers, personal digital assistants (PDAs), mobile phones and the like. These light emitting devices can be used in isolation or can be coupled to optical waveguides for uniform light transmission. Examples of light emitting devices may include light emitting diodes (LEDs). [0002] Existing light emitting devices do not provide a spatially broad emission of light. The emission mode causes vignetting in the optical waveguide coupled to the existing light emitting device. Therefore, uniform illumination cannot be achieved using existing light emitting devices. Additional light emitting devices are required to distribute the light evenly over eg a display. This increases the cost of the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00G02B6/42H01L33/40H01L33/58H01L33/60
CPCG02B6/0021H01L33/58H01L33/405H01L33/60G02B6/0073H01L33/46H01L33/465H01L33/505
Inventor M·普格G·哈伯斯R·S·韦斯特
Owner PHILIPS LUMILEDS LIGHTING CO LLC