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LED light source using fluorescence conversion device with transparent base material

A technology of LED light source and conversion device, which is applied to the parts of lighting devices, optical elements used to change the spectral characteristics of emitted light, lighting devices, etc. Precise control is difficult and other problems to achieve the effect of simple preparation method, improved consistency, and avoidance of thermal aging

Inactive Publication Date: 2010-11-10
李欣洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to accurately control the dosage of the traditional coating method of adjusting the fluorescent powder using resin or silica gel, which makes the LED light colors produced in batches vary greatly, and the color controllability is poor.

Method used

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  • LED light source using fluorescence conversion device with transparent base material
  • LED light source using fluorescence conversion device with transparent base material
  • LED light source using fluorescence conversion device with transparent base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] see figure 1 , an LED device 1, in which an LED chip 11 is packaged, and a fluorescent conversion device 2 is located above the LED chip 11 and fixed.

[0060] When working, the light emitted by the LED chip 11 must pass through the fluorescent conversion device 2 before it can be emitted to the outside. The blue light excites the phosphor film layer on the fluorescent conversion device, and the light emitted by the chip under electric drive excites the phosphor to produce visible light in other bands. , each part mixes colors to form white light.

[0061] The main wavelength emitted by the LED chip 11 generally ranges from 420nm to 480nm, and the composition of the phosphor film layer on the phosphor conversion device is aluminate YAG phosphor that can excite yellow light. The blue light emitted by the LED chip passes through the fluorescent conversion device and excites the phosphor film layer on the fluorescent conversion device, and part of the blue light is conver...

Embodiment 2

[0072] It is basically the same as Embodiment 1, except that the transparent base material of the fluorescent conversion device is formed into a circular lens curved surface, such as image 3 shown; or shaped into a square lens surface, and then cleaned and coated.

Embodiment 3

[0074] It is basically the same as the first embodiment, the difference is that multiple LED chips with the same wavelength are packaged in one LED device, for example, two blue light chips are packaged together, and the main emission wavelength range is generally 420nm-480nm.

[0075] The blue light emitted by the LED chip passes through the fluorescent conversion device and excites the phosphor film layer on the fluorescent conversion device, and part of the blue light is converted into yellow light; the mixture of blue light and yellow light produces white light, and the color coordinates and color temperature depend on the ratio of blue light and yellow light . The spectral composition of LED light sources such as figure 2 shown.

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Abstract

This invention provides an LED light source using a fluorescence conversion device with a transparent base material. The LED light source comprises an LED device and a fluorescence conversion device, wherein the LED device has at least one LED chip; the fluorescence conversion device is arranged on the LED device and has the transparent base material; light emitted from the LED chip is mixed to form white light by using the fluorescence conversion device and emitted to the outside; and the fluorescence conversion device can be arranged on the LED device during package of the LED device and secondary package of the LED device, or a plurality of LED devices share a fluorescence conversion device. The fluorescence conversion device with the transparent base material is formed by coating a fluorescent powder film on the transparent base material shaped from any one material of ARTON, COC, COP, PMMA and optical glass; and the fluorescent powder film on the fluorescence conversion device is excited by a blue ray or an ultraviolet chip to produce visible light of other wave bands, and colors of various sections are mixed to form the white light. The invention further provides the fluorescence conversion device with the ARTON transparent base material and a preparation method thereof.

Description

technical field [0001] The invention belongs to the technical field of LED lighting, in particular to a coating method of LED fluorescent powder. Specifically related to sputter coating technology. technical background [0002] With the advent of ultra-bright LEDs, their efficiency is getting higher and higher, and their prices are gradually falling. At the same time, LED has the characteristics of long life, shock resistance, high luminous efficiency, no interference, no fear of low temperature, no mercury pollution and high cost performance. It is a great potential product that is favored by the semiconductor industry to replace traditional lighting appliances. Ultra-high-brightness LEDs have greatly expanded the application of LEDs in various signal display and lighting source fields, such as interior and exterior lights of automobiles, various traffic lights, indoor and outdoor information displays and backlights. Using LED products for lighting will provide a wider ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V9/10H01L33/00F21Y101/02F21V9/40
Inventor 李欣洋
Owner 李欣洋
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