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Title:
LIGHT SOURCE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/082974
Kind Code:
A1
Abstract:
A light source apparatus (10), comprising a laser light source (110), used for emitting a first light (L1); a wavelength conversion apparatus (120), arranged on the optical path of the first light (L1), and comprising a transparent wavelength conversion layer (121) and a transparent light guide layer (122) arranged in sequence along the direction of incidence of the first light (L1), the transparent wavelength conversion layer (121) comprising a first face, the first face being an incident light face and an emergent light face of the wavelength conversion apparatus (120); the wavelength conversion apparatus (120) also comprises a light reflection structure (123), arranged on the surface of the transparent light guide layer (122) furthest from the transparent wavelength conversion layer (121); the transparent wavelength conversion layer (121) absorbs part of the first light (L1) and emits a second light (L2) having a different wavelength range to the first light (L1), and part of the first light (L1) enters the transparent light guide layer (122) via the transparent wavelength conversion layer (121). Compared to the prior art, the unabsorbed first light (L1) is transmitted twice through the transparent light guide layer (122), increasing the light path and expanding the beam cross-sectional area, such that the light spot of the first light (L1) emitted by the wavelength conversion apparatus (120) expands to match the light spot of the second light (L2), thereby improving the colour uniformity of the light emitted by the light source apparatus (10).

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Inventors:
CHEN BIN (CN)
ZHANG XIANPENG (CN)
LI YI (CN)
Application Number:
PCT/CN2019/107987
Publication Date:
April 30, 2020
Filing Date:
September 26, 2019
Export Citation:
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Assignee:
YLX INC (CN)
International Classes:
F21V7/00; F21K9/20
Foreign References:
CN104534409A2015-04-22
CN204372585U2015-06-03
CN204372822U2015-06-03
CN102890398A2013-01-23
CN207364677U2018-05-15
JP2012209228A2012-10-25
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