Invention Grant
- Patent Title: Planar front illumination system having a light guide with micro lenses formed thereon and method of manufacturing the same
- Patent Title (中): 具有形成有微透镜的导光体的平面前照明系统及其制造方法
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Application No.: US13588945Application Date: 2012-08-17
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Publication No.: US09285530B2Publication Date: 2016-03-15
- Inventor: Charles Neugebauer , Jason Wong , Sam Niansheng Qiu , David Klawon
- Applicant: Charles Neugebauer , Jason Wong , Sam Niansheng Qiu , David Klawon
- Applicant Address: US NY New York
- Assignee: NOOK DIGITAL, LLC
- Current Assignee: NOOK DIGITAL, LLC
- Current Assignee Address: US NY New York
- Agency: Winston & Strawn LLP
- Main IPC: F21V7/04
- IPC: F21V7/04 ; F21V8/00

Abstract:
A system for illuminating a reflective display or other material from a planar front device and a method of manufacture thereof. The system includes a light guide plate that conducts light from an edge light source across the face of a reflective display. Micro lenses are formed on the inner or outer surface of the light guide and direct the light conducted in the light guide toward the display. A stepped index layer is formed on the surface of light guide plate containing the micro lenses. The stepped index layer has an index of refraction lower than an index of refraction of the light guide plate to assist in the total internal reflection of light injected into the light guide plate. A top layer protective coat or touch screen can be laminated to the outside of the light guide plate.
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