Invention Grant
- Patent Title: Light guides
- Patent Title (中): 导光板
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Application No.: US13450970Application Date: 2012-04-19
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Publication No.: US08827532B2Publication Date: 2014-09-09
- Inventor: Qingbing Wang , Gary T. Boyd , Tri D. Pham , Robert Lee Erwin , David Scott Thompson
- Applicant: Qingbing Wang , Gary T. Boyd , Tri D. Pham , Robert Lee Erwin , David Scott Thompson
- Applicant Address: US MN Saint Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN Saint Paul
- Agent Daniel J. Iden
- Main IPC: F21V8/00
- IPC: F21V8/00

Abstract:
Lightguides are disclosed. More particularly, lightguides that include a lightguiding layer and a light extracting layer having a structured surface are disclosed. The light guiding layer is optically coupled to a first set of structures of the structured surface at given locations, and is not optically coupled to a second set of structures at given locations, thereby producing total internal reflection at the second locations. The selective optical coupling may be achieved by a number of different contemplated means as discussed herein. The lightguides allow for distribution of light along with redirection towards an image viewer without a number of commonly required optical elements in backlights.
Public/Granted literature
- US20120268967A1 LIGHT GUIDES Public/Granted day:2012-10-25
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