Invention Grant
- Patent Title: Light emitting device with high near-field contrast ratio
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Application No.: US16529078Application Date: 2019-08-01
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Publication No.: US11056618B2Publication Date: 2021-07-06
- Inventor: Grigoriy Basin , Lex Alan Kosowsky , Chee Ming Thoe , Choon Earn Chan
- Applicant: LUMILEDS LLC
- Applicant Address: US CA San Jose
- Assignee: LUMILEDS LLC
- Current Assignee: LUMILEDS LLC
- Current Assignee Address: US CA San Jose
- Priority: EP18201119 20181018
- Main IPC: H01L33/50
- IPC: H01L33/50 ; H01L33/60

Abstract:
A light emitting device includes an LED having a light emitting top surface and sidewalls. A phosphor structure is attached to the light emitting surface of the LED. The phosphor structure has a light emitting top surface facing away from the LED light emitting surface, and sidewalls. A light reflective material is arranged to cover the sidewalls of the LED and the phosphor structure. A light absorptive region is defined in the light reflective material around a perimeter of the light emitting surface of the phosphor structure. The light absorptive region may be spaced apart from the perimeter of the phosphor structure by a gap. The light absorptive region may be formed by ultraviolet laser illumination of the light reflecting material.
Public/Granted literature
- US20200044119A1 LIGHT EMITTING DEVICE WITH HIGH NEAR-FIELD CONTRAST RATIO Public/Granted day:2020-02-06
Information query
IPC分类: