LED light source using filter with dual-function of stopping ultraviolet rays and infrared rays

Abstract

The invention provides an LED light source using a filter with dual functions of stopping ultraviolet rays and infrared rays. The LED light source comprises an LED device and the filter, wherein the LED device is provided with at least one LED chip; and the filter is arranged on the LED device and is used for filtering light rays emitted from the LED chip; the light emitted from the LED chip emit to the external through the filter; the filter can be added when the LED device is encapsulated or can be arranged when the LED device is secondarily encapsulated; or a plurality of LED devices use the same filter. The filter is a transparent substrate which has the dual functions of stopping the ultraviolet rays and the infrared rays and is molded by any one of materials of ARTON, COC, COP, PMMA and optical glass; an ultraviolet stopping film and an infrared stopping film are plated on the surface of the filter; and the filter can absorb the light in a short wavelength range in which the wavelength is less than 445 nm and a long wavelength range in which the wavelength is greater than 700 nm. The invention also provides the filter with the dual functions of stopping the ultraviolet rays and the infrared rays and a preparation method thereof.

Description

An LED light source using a dual-function filter that cuts off ultraviolet rays and infrared rays technical field The invention belongs to the technical field of LED lighting. Specifically related to light filtering technology. technical background 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 ...

AI Technical Summary

Problems solved by technology

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. (CyclicOlefinCopolymer, cyclic olefin copolymer), cyclic olefin polymer (Cyclo-olefinpolymer referred to as COP) amorphous polyolefin material, PMMA (polymethyl methacrylate, acrylic) and the patent of transparent substrate coating process for optical glass molding

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