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LED lamp based on transparent fluorescent ceramics

A technology of LED lamps and fluorescent ceramics, which is applied in parts of lighting devices, semiconductor devices of light-emitting elements, cooling/heating devices of lighting devices, etc. problem, to achieve the effect of improving heat dissipation, efficient and stable light emission, and solving thermal and light decay

Inactive Publication Date: 2014-07-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that the traditional fluorescent powder + silica gel (resin) sealant is difficult to achieve long-term, stable and high-quality light emission due to the poor heat dissipation of the existing LED filament, a LED filament structure based on transparent fluorescent ceramics is proposed, which is made of transparent fluorescent ceramics. It is the substrate, which is different from Reference 1, that is, the substrate is located outside the LED chip, and it plays the role of the fluorescent material as well as the substrate, which can effectively solve the problem of phosphor light decay in LED filament lamps.

Method used

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  • LED lamp based on transparent fluorescent ceramics
  • LED lamp based on transparent fluorescent ceramics
  • LED lamp based on transparent fluorescent ceramics

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Embodiment 1

[0018] The upper and lower fluorescent ceramic strips 2 use: Ce:YAG fluorescent ceramics processed into two long thin slices of 30mm×1.5mm×0.38mm, such as figure 2 As shown, an LED filament is formed. Because the thermal conductivity of Ce:YAG fluorescent ceramics is much higher than that of glass, plastic and other substrates, it can improve the heat dissipation of LED filament lamps to a certain extent. Moreover, fluorescent ceramics do not have the problems of aging and discoloration of traditional fluorescent powder + silica gel (or resin) packaging. More importantly, Ce:YAG fluorescent ceramics can also effectively improve the light attenuation problem under the appropriate doping concentration, which can guarantee the LED The filament lamp has long-term stable working performance and service life.

Embodiment 2

[0020] The upper and lower fluorescent ceramic strips 2 use: Ce, Pr: YAG fluorescent ceramics processed into two long thin slices of 30mm×1.5mm×0.38mm, such as figure 2 As shown, an LED filament is formed.

Embodiment 3

[0022] In the upper and lower fluorescent ceramic strips 2, Ce, Cr: YAG fluorescent ceramics are processed into two strips of 40mm×2mm×0.38mm, such as figure 2 As shown, an LED filament is formed.

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Abstract

Disclosed is an LED lamp based on transparent fluorescent ceramics. The LED lamp is composed of LED lamp filaments, electrode leads and a lampshade and is characterized in that the strip-shaped transparent fluorescent ceramics serve as the substrate of the LED lamp filaments, the width of the transparent fluorescent ceramics is equal to that of LED chips, then the blue LED chips (including leads) are sequentially fixed to the transparent fluorescent ceramic battens in an adhering mode, and identical transparent fluorescent ceramic strips adhere to the other sides of the LED chips or the other sides of the LED chips are coated with fluorescent optical cement. The transparent fluorescent ceramics can be Ce : YAG (including the situation when Ce ion concentration is zero), or Ce : Tb3Al5O12, or Ce, Cr : YAG, or Ce, Pr : YAG, or Ce : YAG+MgAl2O4, or Ce, Pr : YAG+MgAl2O4, or Ce, Cr : YAG +MgAl2O4. According to the LED lamp based on the transparent fluorescent ceramics, luminous decay of a fluorescent powder silica gel resin mixture phosphor can be effectively avoided, the performance of the LED lamp can be improved, and the service life of the LED lamp can be prolonged.

Description

Technical field [0001] The invention relates to the technical field of LED lighting, in particular to an LED lamp based on transparent fluorescent ceramics. Background technique [0002] The traditional LED package structure is made of Cu, Al and other heat sink materials. The LED of this structure can only emit light on one side. When the lens is used to balance the light distribution, the light-emitting angle generally does not exceed 165°. The Japanese Oxtail Light Source in 2008 It was the first to introduce traditional incandescent lamps with filaments composed of LED lamp beads, which attracted great attention from the industry and achieved mass production. For example, reference document 1 (invention patent application number: 201310239213.5) discloses an LED filament lamp structure, which includes a substrate, a light-emitting unit (blue and red LED chips) fixed on at least one side of the substrate, and a light-emitting The sealant layer on the outer layer of the unit. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/64H01L33/50H01L25/075F21V29/00F21Y101/02F21Y115/10
CPCH01L33/483F21V19/001F21Y2101/00H01L25/0753H01L33/502H01L33/641
Inventor 周圣明林辉陈冲易学专丰岳
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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