A method for reducing blue light hazards of white light-emitting diodes

Abstract

The invention discloses a method for reducing the blue light hazard of a white light emitting diode. The present invention uses purple light and sky blue light to mix to obtain the visual effect of blue light, eliminates the blue light component at the same time, effectively reduces the blue light hazard of white light emitting diodes, reduces its damage to the retina of the human eye, and improves photobiological safety; on the CIE1931 chromaticity diagram The possible areas of green light and red light can be obtained near the three vertices, and at the same time, the component of yellow light is increased to obtain a higher color rendering of the mixed light source; by using the present invention, while reducing the harm of blue light, the white light source has good color rendering , can provide better visual comfort; can obtain dynamic white light with adjustable color temperature, so that different color temperatures correspond to different adaptation ranges; the present invention has the advantages of low blue light hazard, high color rendering, and adjustable color temperature.

Description

technical field [0001] The invention relates to the field of semiconductor lighting, in particular to a method for reducing blue light hazards of white light emitting diodes. Background technique [0002] Light Emitting Diode (LED for short) is a semiconductor device that converts electrical energy into light energy. It has the advantages of small size, long life, high efficiency, and fast response. It is currently the most widely used lighting device. Under normal circumstances, there are two ways to use LEDs to emit white light needed for lighting: one is to use blue LEDs to excite phosphors, and the light emitted by phosphors is mixed with LED blue light to obtain white light; the other is to use red, green, and blue primary color LEDs to emit light. Illuminating white light is obtained after mixing. Therefore, blue light is an indispensable component in white LED lighting. According to the national standard "Photobiological Safety Standards for Lamps and Lamp Systems" ...

AI Technical Summary

Problems solved by technology

[0005] Filtering the blue light component in white light is a common method to reduce the harm of blue light (CN201711461926.0), but this method all leads to a reduction in the color reduction of white light to blue light and reduces the color rendering of white light

The work of reducing blue light hazards (CN201910096408.6) uses red, yellow, blue and green four-primary color mixed light, and reduces blue light components by increasing the ratio of red and yellow light to obtain low blue light hazards, but because of maintaining high color rendering, high color temperature The blue light damage under the

Images