Title:
ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/184842
Kind Code:
A1
Abstract:
An illumination device (10), comprising a laser light source (102), a wavelength conversion element (104) and a diffusion element (110). The laser light source (102) is used to emit laser light; the wavelength conversion element (104) is used to at least partially convert received laser light into fluorescent light; and the diffusion element (110) is located between the laser light source (102) and the wavelength conversion element (104), the diffusion element (110) comprises a first scattering region (113) and a second scattering region (114) surrounding the first scattering region (113), the diffusion angle of the first scattering region (113) is smaller than that of the second scattering region (114), and the laser light is scattered by the first scattering region (113) and the second scattering region (114), and is then incident to the wavelength conversion element (104). The illumination device (10) is provided with the diffusion element (110) comprising the first scattering region (113) and the second scattering region (114) that surrounds the first scattering region (113), and the diffusion angle of the first scattering region (113) is smaller than that of the second scattering region(114), so that a yellow spot at the edge of the outgoing spot is reduced on the basis of not affecting the central illuminance of the outgoing spot, and the imaging quality is improved.
Inventors:
CHEN BIN (CN)
CHEN XINGJIA (CN)
JIANG RU (CN)
CHEN XINGJIA (CN)
JIANG RU (CN)
Application Number:
PCT/CN2020/135093
Publication Date:
September 23, 2021
Filing Date:
December 10, 2020
Export Citation:
Assignee:
YLX INC (CN)
International Classes:
G02B5/02
Foreign References:
| CN105116675A | 2015-12-02 | |||
| US20160291216A1 | 2016-10-06 | |||
| CN102767786A | 2012-11-07 | |||
| CN208172483U | 2018-11-30 | |||
| CN101303428A | 2008-11-12 | |||
| DE19832665A1 | 2000-01-27 |
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