Area light source

Abstract

The invention discloses an area light source, which comprises a baes, a lampshade and a white luminous body arranged in the lampshade, wherein the inner side of the lampshade is provided with a yellowfluorescent film; the yellow fluorescent film is prepared from the following ingredients in percentage by weight: 0.1 to 1.5 percent of yellow fluorescent powder, 10 to 20 percent of diffusion masterbatch and 78.5 to 89.9 percent of transparent engineering plastic particles; the particle diameter of the yellow fluorescent powder is smaller than or equal to 4 mum. The area light source has the advantages of low biological harm value (low blue light radiation intensity and low retina thermal harm value), low glare rate and good visual comfortable degree.

Description

Technical field [0001] The invention relates to a lighting device, and more specifically, it relates to a surface light source. Background technique [0002] With the development of science and technology, the lighting fixtures that people use daily are mainly incandescent lamps and developed into tri-primary fluorescent lamps and LED lighting fixtures. Among them: [0003] Incandescent lamp: Because the incandescent lamp uses metal tungsten wire to emit light, the linear light source emits light, mainly yellow light (low color temperature), and its spectrum is composed of red, green and blue components. When the luminous flux reaches a certain value, due to the small light-emitting area of ​​the line light source, serious glare will be caused. [0004] Three-primary fluorescent lamp: the mercury vapor of the lamp tube is excited by the high-pressure ultraviolet light of the 220v AC rectifier to excite the three-primary color phosphor (red, green, blue) coated on the inner wall of t...

AI Technical Summary

Problems solved by technology

When the luminous flux reaches a certain value, the light-emitting area of ​​the line light source is small, which will cause serious glare

[0004] Tri-primary fluorescent lamp: By exciting the mercury vapor of the lamp tube with high-voltage ultraviolet light from a 220v AC rectifier, the tri-primary phosphor powder (red, green, blue) coated on the inner wall of the lamp tube is excited to form a white light source, and its spectrum combination is red, green and blue. Composition of ingredients, but its light radiation is harmful, the glare is severe, the photobiological hazard is relatively large, and the blue light radiation is relatively high

[0006] Through the understanding of the light emitting principles of the above-mentioned incandescent lamps, tri-color fluorescent lamps, and LED lighting fixtures, there are obvious deficiencies such as glare and excessively high photobiological hazard values.

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