LED light source using optical glass filter

A technology of LED light source and optical glass, which is applied in the field of light filtration, can solve the problems of no transparent substrate coating process, no band filter, etc., so as not to affect the visible light transmittance, high ultraviolet cut-off rate, and reduce the hazards of light radiation Effect

Inactive Publication Date: 2012-07-04
李欣洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There are many patent documents about LED light sources, but there are no patents for filtering violet, near-ultraviolet, ultraviolet, near-infrared, and infrared bands, and there is no coating process for transparent substrates formed by optical glass with dual functions of cutting off ultraviolet / infrared rays. patent

Method used

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  • LED light source using optical glass filter
  • LED light source using optical glass filter
  • LED light source using optical glass filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] see figure 1 , an LED device 1, in which an LED chip 11 is encapsulated, and an optical glass filter 2 is located above the LED chip 11 and fixed.

[0044] When working, the light emitted by the LED chip 11 must pass through the optical filter 2 before it can be emitted to the outside. The optical filter 2 filters the light emitted by the LED chip within the range of wavelengths less than 445nm and greater than 700nm.

[0045] LED chip 11 can choose any desired emission wavelength, such as green light with a dominant wavelength of 530nm, or red light with a dominant wavelength of 620nm; another example is blue light with a dominant wavelength of 460nm, and mix a certain proportion in the potting glue YAG powder, the blue light emitted by the LED chip excites the YAG powder, and finally obtains white light with a color temperature of 8000K or other required color temperatures.

[0046] The preparation of the optical filter with dual functions of cutting off ultraviolet ...

Embodiment 2

[0058] It is basically the same as in Example 1, except that the preparation of the optical filter is performed by magnetron sputtering coating the inner film on the transparent substrate of optical glass with a silicon target and a tantalum pentoxide target. On this basis, the The product is obtained by magnetron sputtering coating the outer film from the titanium oxide-cerium oxide target.

Embodiment 3

[0060] Basically the same as Embodiment 1, the difference is that the optical filter is formed into a circular lens surface by an optical glass transparent substrate, such as figure 2 shown; or shaped into a square lens surface, and then cleaned and coated.

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Abstract

The invention provides an LED light source using an optical glass filter with double functions of stopping ultraviolet rays and infrared rays. The LED light source comprises an LED device provided with at least one LED chip, and a filter, wherein the light filter is arranged on the LED device and is used for filtering light emitted by the LED chip; the light emitted by the LED chip irradiates to the outside through the light filter; and the filter can be added when the LED device is packaged or can be arranged when the LED device is secondarily packaged, or a plurality of LED devices share one light filter. The filter is a transparent substrate which has double functions of stopping the ultraviolet rays and the infrared rays and is formed by optical glass. The surface of the filter is plated with an ultraviolet ray stopping film layer and an infrared ray stopping film layer; and the LED light source can be used for absorbing light within a short wavelength of being smaller than 445nm and within a long wavelength of being greater than 700nm. The invention also provides the optical glass filter with the double functions of stopping the ultraviolet rays and the infrared rays as well as a preparation method of the optical glass filter.

Description

technical field [0001] The invention belongs to the technical field of LED lighting. Specifically related to light filtering 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 application space for LEDs. [0003] As the application range ...

Claims

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Application Information

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IPC IPC(8): F21V9/00F21V9/04F21V9/06H01L33/00F21Y101/02F21Y115/10
Inventor 李欣洋
Owner 李欣洋
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