White light LED

A light-emitting diode, white light technology, used in semiconductor devices, electrical components, circuits, etc.

Inactive Publication Date: 2008-09-10
LITE ON OPTO TECH (CHANGZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of the existing white light emitting diodes, and provide a white light emitting diode which can solve the problem of inconsistent light color, which is very suitable for practical use.

Method used

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Embodiment Construction

[0036] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and effects of the white light emitting diode proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. The details are as follows.

[0037] see image 3 Shown is a schematic side view of a preferred embodiment of the white light emitting diode of the present invention. A preferred embodiment of the white light emitting diode of the present invention includes a base 21 , a light emitting crystal grain 22 , a first fluorescent layer 23 , a second fluorescent layer 24 , and a protection layer 25 .

[0038] The above-mentioned base 21 has a body formed with a cup-shaped accommodating groove 211 , and at least a pair of metal electrodes (not shown) penetrating through the accommodating groove 211 .

[0...

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PUM

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Abstract

The invention relates to a white light emitting diode which comprises a base, light emitting crystal grains arranged on the base, a first fluorescent layer which is arranged on the base and covers the light emitting crystal grains and a second fluorescent layer which is arranged on the first fluorescent layer and has a top area smaller than the top area of the first fluorescent layer; the light emitting crystal grains are positioned within orthographic projection range below the second fluorescent layer so as to increase the path length of the fluorescent layer that the forward light of the light emitting crystal grains passes through and improve the color evenness of the white light of the white light emitting diode.

Description

technical field [0001] The invention relates to a light-emitting element, in particular to a white light-emitting diode that can improve the light color difference between forward and side white light, and effectively solve the problem of inconsistent light color. Background technique [0002] Light-emitting diodes have the advantages of small size, light weight, and fast response, and can be widely used as light sources for various indicators and displays. The white light-emitting diodes developed in recent years can also replace ordinary tungsten filament bulbs or eyelight tubes as lighting sources. [0003] Various forms of white light emitting diodes are known, one of the common white light emitting diodes, see figure 1 As shown, it is a schematic diagram of an existing white light emitting diode in the past, which covers a fluorescent layer 13 containing phosphor powder around a blue light-emitting crystal grain 12, and absorbs a part of the blue light emitted by the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00
Inventor 林益山杜冠贤
Owner LITE ON OPTO TECH (CHANGZHOU) CO LTD
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