A laser projection light source

A laser projection and light source technology, applied in optics, instruments, projection devices, etc., can solve the problems of high optical energy density and affect the reliability of laser projectors, achieve uniform energy, simple and effective powder burning risk, and reduce energy density. Effect
CN110376835BActive Publication Date: 2021-01-26SICHUAN CHANGHONG ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN CHANGHONG ELECTRIC CO LTD
Publication Date
2021-01-26

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Abstract

The invention discloses a laser projection light source, which comprises a laser array, a telescopic assembly, a dichromatic assembly, a light receiving assembly, a fluorescent powder wheel device, ablue light path, a light gathering assembly, a color wheel device and a light bar assembly, wherein a laser beam emitted by the laser array penetrates through the telescopic assembly, the dichromaticassembly and the light receiving assembly and is then focused on the surface of the fluorescent powder wheel device. The first surface of a red filter area of the color wheel device is a scattering surface, the second surface is a long-wave-pass filter film, and light in a reflected wave band penetrates through a diffuse scattering surface twice, so that the energy is more uniform when a reflectedlight spot irradiates the surface of the surface of fluorescent powder, and the energy density at the center point is reduced; and the powder burning risk of the high-brightness laser projection system can be simply and effectively solved.
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Description

technical field

[0001] The invention relates to the technical field of laser projection display, in particular to a laser projection light source. Background technique

[0002] Laser projection display is a newly developed projection technology, which uses semiconductor lasers as light sources to replace traditional light sources; the existing technical solutions mainly use blue light lasers to excite phosphors to produce red, green, and yellow light, and then synthesize white light through a photocombining system . There are two main sources of red light, one is that blue light excites red phosphor powder to emit red light, and the other is blue light excites yellow phosphor powder to emit yellow light, and then filters out red wavelength light through the filter color wheel. Due to the low high-temperature efficiency of the red phosphor and the serious light decay problem, in the prior art, the method of exciting the yellow phosphor to emit yellow light and then filtering...

Claims

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