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US Patent 11643595 Wavelength conversion member, light-emitting device, and image display device

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Patent
Patent
0

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
116435950
Patent Inventor Names
Keisho Yamashita0
Naoto Kijima0
Yuki Shiota0
Yohei Yamauchi0
Tomokazu Yoshida0
Shoji Hosokawa0
Date of Patent
May 9, 2023
0
Patent Application Number
178078510
Date Filed
June 20, 2022
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Patent Citations
‌
US Patent 10563122 Semiconductor nanoparticles and method of producing semiconductor nanoparticles
0
Patent Primary Examiner
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William J Carter
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CPC Code
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F21V 9/32
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F21V 9/38
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F21V 9/30
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F21V 3/12
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H01L 33/502
0

A wavelength conversion member including a wavelength conversion layer containing a fluoride phosphor, quantum dots, a surfactant, and a resin. The fluoride phosphor contains fluoride particles having a specific composition and having particle size values within specific ranges. The quantum dots include at least one selected from a first crystalline nanoparticle and a second crystalline nanoparticle. The first crystalline nanoparticle has a specific composition. When irradiated with light having a wavelength of 450 nm, the first crystalline nanoparticle emits light having an emission peak at a wavelength in a range from 510 nm to 535 nm, and a full width at half maximum of the emission peak of the first crystalline nanoparticle is in a range from 10 nm to 30 nm. The second crystalline nanoparticle includes a chalcopyrite-type crystalline structure, and a full width at half maximum of the emission peak of the second crystalline nanoparticle is 45 nm or less.

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