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Title:
PROJECTION OPTICAL PATH AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/100100
Kind Code:
A1
Abstract:
A projection optical path and a projection device. The projection optical path comprises a three light source system (1) which emits first converged light and a single light source system (2) which emits monochromatic wavelength light. The three light source system (1) comprises the first converged light formed by means of convergence between second converged light and first wavelength light. The single light source system (2) comprises third wavelength light emitted by a third light source (30). The first wavelength light, the second wavelength light and the third wavelength light are respectively one of red light, green light and blue light. The wavelength range of fourth wavelength light is within the wavelength range of the red light. The wavelength of the fourth wavelength light is denoted as λ1, the wavelength of red light in the first wavelength light, the second wavelength light and the third wavelength light is denoted as λ2, where λ1≠λ2. An excitation light source (50) emits excitation light to the first light source (10) or the second light source (20). The projection optical path can reduce the thermal effect caused by the red light, and can improve the luminous efficiency of light sources of other colors, thereby effectively improving the brightness of a whole image displayed.

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Inventors:
GONG JINGJIAN (CN)
DENG YANGCHUN (CN)
DING WEITAO (CN)
LIU DEAN (CN)
LU GONGTAO (CN)
Application Number:
PCT/CN2021/101676
Publication Date:
May 19, 2022
Filing Date:
June 23, 2021
Export Citation:
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Assignee:
GOERTEK INC (CN)
International Classes:
G03B27/48; G03B21/20
Foreign References:
CN105474073A2016-04-06
CN105223761A2016-01-06
CN102330888A2012-01-25
CN202995240U2013-06-12
US20090262308A12009-10-22
US20170307969A12017-10-26
CN202022637744U2020-11-13
CN202120623773U2021-03-26
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