Invention Grant
- Patent Title: Field-of-view compensated polarization switch for short-throw 3D projection
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Application No.: US13182381Application Date: 2011-07-13
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Publication No.: US08638400B2Publication Date: 2014-01-28
- Inventor: Gary D. Sharp , Jianmin Chen , Michael G. Robinson
- Applicant: Gary D. Sharp , Jianmin Chen , Michael G. Robinson
- Applicant Address: US CA Beverly Hills
- Assignee: RealD Inc.
- Current Assignee: RealD Inc.
- Current Assignee Address: US CA Beverly Hills
- Agent Neil G. J. Mothew; Darlene K. Kondo
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
Generally, this disclosure concerns the angle sensitivity of polarization switch elements and the resulting impact of the ray direction on performance. More specifically, apparatus and techniques for compensating the angular sensitivity of liquid crystal (LC) polarization switches are described that enhance the performance of polarization switches. For example, a polarization switch is disclosed that transforms linearly polarized light of an initial polarization orientation that includes a first and second liquid crystal cell with a compensator located between the LC cells. The compensator layer is operable to enhance the field of view through the polarization switch. Such compensation techniques are particularly useful for short-throw projection environments.
Public/Granted literature
- US20120013813A1 Field-of-view compensated polarization switch for short-throw 3D projection Public/Granted day:2012-01-19
Information query
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