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light emitting device

A light-emitting device, blue light technology, applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of manufacturing cost, power consumption, increase in the total volume of white LEDs, etc., to reduce power consumption, small total volume, and reduce manufacturing costs Effect

Inactive Publication Date: 2011-11-30
VISERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above methods can improve the CRI performance of white LEDs, their manufacturing cost, power consumption, and overall volume of white LEDs will increase due to the additional LED chips

Method used

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Embodiment Construction

[0022] Examples of the present invention are described below. The purpose of this description is to provide a general concept of the present invention and not to limit the scope of the present invention. The scope of protection of the present invention should be determined by the scope of protection defined by the appended claims.

[0023] Please refer to figure 1 , which shows a schematic cross-sectional view of a light emitting device (LED) according to an embodiment of the present invention. The light emitting device 200 , such as a white light LED, includes a carrier substrate 100 . The carrier substrate 100 can be a semiconductor or ceramic substrate or other known and suitable packaging substrates. In one embodiment, the carrier substrate 100 is a silicon substrate, and may include various elements, such as transistors, resistors, and other well-known semiconductor elements. In order to simplify the drawing, individual elements are not shown here.

[0024] A light ...

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Abstract

A light-emitting device (LED) is disclosed. The LED includes a carrier substrate having a blue light emitter thereon. A layer containing a fluorescent material is on the blue light emitter. An encapsulant is disposed around the blue light emitter. Pigments are suspended between an outer surface of the encapsulant and the blue light emitter.

Description

technical field [0001] The present invention relates to a light-emitting device (light-emitting device, LED), in particular to a light-emitting device capable of improving color rendering index (CRI). Background technique [0002] Light emitting devices (LEDs) are solid state light sources and have been known for many years. LEDs emit light through the combination of electron-hole pairs at the forward bias of the p-n junction of semiconductor materials. Compared with traditional lamps, LED devices have the advantages of low power consumption and long service life, so white LED devices have high color rendering index (CRI), making them one of the most widely accepted lighting devices. [0003] The above-mentioned white LED can form a white LED device by mixing red, green, and blue light by using a red LED chip (chip / die), a green LED chip, and a blue LED chip. However, the above-mentioned three-in-one white LED is relatively expensive because it needs three LED chips to emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/56
CPCH01L33/50H01L33/44H01L33/56H01L2924/0002H01L2924/00
Inventor 刘芳昌李冠屏
Owner VISERA TECH CO LTD