Invention Grant
- Patent Title: Polarized white light devices using non-polar or semipolar gallium containing materials and transparent phosphors
- Patent Title (中): 使用非极性或半极性含镓材料和透明荧光体的极化白光装置
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Application No.: US12754886Application Date: 2010-04-06
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Publication No.: US08299473B1Publication Date: 2012-10-30
- Inventor: Mark P. D'Evelyn , Rajat Sharma , Eric M. Hall , Daniel F. Feezell
- Applicant: Mark P. D'Evelyn , Rajat Sharma , Eric M. Hall , Daniel F. Feezell
- Applicant Address: US CA Fremont
- Assignee: Soraa, Inc.
- Current Assignee: Soraa, Inc.
- Current Assignee Address: US CA Fremont
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: H01L27/15
- IPC: H01L27/15 ; H01L33/00
Abstract:
A light emitting device includes a substrate having a surface region and a light emitting diode overlying the surface region. The light emitting diode is fabricated on a semipolar or nonpolar GaN containing substrate and emits electromagnetic radiation of a first wavelength. The diode includes a quantum well region characterized by an electron wave function and a hole wave function. The electron wave function and the hole wave function are substantially overlapped within a predetermined spatial region of the quantum well region. The device has a transparent phosphor overlying the light emitting diode. The phosphor is excited by the substantially polarized emission to emit electromagnetic radiation of a second wavelength.
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