Invention Grant
US07661864B2 Back-light unit having prism sheet including reflective elements with different curvature surfaces, a back-light unit and LCD device using said back-light unit
失效
具有棱镜片的背光单元包括具有不同曲率表面的反射元件，背光单元和使用所述背光单元的LCD装置
- Patent Title: Back-light unit having prism sheet including reflective elements with different curvature surfaces, a back-light unit and LCD device using said back-light unit
- Patent Title (中): 具有棱镜片的背光单元包括具有不同曲率表面的反射元件，背光单元和使用所述背光单元的LCD装置
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Application No.: US12117195Application Date: 2008-05-08
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Publication No.: US07661864B2Publication Date: 2010-02-16
- Inventor: Sayuri Kohara , Daiju Nakano , Fumiaki Yamada
- Applicant: Sayuri Kohara , Daiju Nakano , Fumiaki Yamada
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Michael J. Buchenhorner; Vazken Alexanian
- Main IPC: F21V7/09
- IPC: F21V7/09
Abstract:
A prism sheet changes a direction of light propagation by reflecting light launched with an intensity distribution of a predetermined angle range wherein: a reflective surface for perfect reflection of light includes a higher order surface constructed by at least a small curvature surface and a surface different from the small curvature surface.
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