Title:
波長変換部材を用いた白色光出力デバイス
Document Type and Number:
Japanese Patent JP7162202
Kind Code:
B2
Abstract:
A wavelength conversion member (10) converts a wavelength of laser light (L). The wavelength conversion member includes a substrate (1) having reflectivity with respect to the laser light, and a phosphor layer (2) including a phosphor for converting the laser light into light having a longer wavelength than that of the laser light, the phosphor layer being on the substrate. The phosphor layer includes a plurality of concave parts (3), each having a depth of 50% or more and 80% or less with respect to a film thickness of the phosphor layer and an opening width of 50 µm or more, on a surface of the phosphor layer, the surface irradiated with the laser light. A distance between adjacent concave parts of the plurality of concave parts is smaller than a spot diameter of the laser light to be emitted to the surface of the phosphor layer. A white light emitting device (100) includes a laser light source configured to emit laser light (20), and the wavelength conversion member.
Inventors:
Tatsuya Okuno
Application Number:
JP2020548387A
Publication Date:
October 28, 2022
Filing Date:
September 11, 2019
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
F21V7/30; G02B5/20; G02B5/26; H01S5/0239
Domestic Patent References:
| JP2013161561A | ||||
| JP2017120753A | ||||
| JP2012109400A |
Foreign References:
| WO2014024218A1 | ||||
| WO2018101348A1 |
Attorney, Agent or Firm:
Masakazu Ito
Takayoshi Matsumoto
Satoru Hosokawa
Taishi Mori
Takayoshi Matsumoto
Satoru Hosokawa
Taishi Mori