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公开(公告)号：US20220389313A1
公开(公告)日：2022-12-08
申请号：US17805458
申请日：2022-06-04
摘要： A white light emitting device comprises: an LED that generates excitation light of wavelength from 420 nm to 480 nm; and photoluminescence materials that generate light with a peak emission wavelength from 500 nm to 650 nm comprising a broadband phosphor, and a manganese-activated narrowband red fluoride phosphor with a peak emission wavelength from 628 nm to 640 nm and a full width at half maximum of less than 30 nm. The device generates white light with a selected color temperature from 2200K to 6500K, a General Color Rendering Index, CRI Ra, of at least 80, and a Duv (Delta u, v) from 0.0060 to 0.0170 for the selected color temperature and wherein the device has an LER (Luminous Efficacy of Radiation) of at least 320 lm/Wopt.
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公开(公告)号：US20230324029A1
公开(公告)日：2023-10-12
申请号：US18329016
申请日：2023-06-05
发明人： Yi-Qun LI , Jing Qiong ZHANG
IPC分类号： F21V9/38 , A01G7/04 , F21Y115/10
CPC分类号： F21V9/38 , A01G7/045 , F21Y2115/10
摘要： There is provided a light emitting device, for example a grow-light, comprising: a first solid-state light source that generates blue light with a blue photon flux; and a second solid-state light source that generates red light with a red photon flux; wherein a ratio of the blue photon flux to red photon flux is from about 1:3 to about 3:1. It may be that the broadband blue light substantially matches at least one of: the absorption peak wavelength of chlorophyll-a; the absorption peak wavelength of chlorophyll-b; and the absorption peak wavelength of carotenoid.
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公开(公告)号：US20220352416A1
公开(公告)日：2022-11-03
申请号：US17770931
申请日：2020-10-23
发明人： Yi-Qun LI
摘要： A white light emitting device (backlight) comprises: a Multiple Quantum Well (MQW) dual-wavelength LED; and a narrowband photoluminescence material that generates red light with a peak emission wavelength from about 620 nm to about 660 nm. The MQW dual-wavelength LED comprises at least one first Quantum Well (QW) that generates blue light with a dominant wavelength from 440 nm to 470 nm and at least one second Quantum Well (QW) to generate green light with a dominant wavelength from 520 nm to 540 nm.
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