05422756 is referenced by 260 patents and cites 20 patents.

A backlighting system employs a retroreflecting polarizer, comprising optical thin films coated on a structured material, to divide an incident beam of light into polarized components. One component is transmitted through the polarizer and the other is rejected. Optionally, a reflector (for example, a diffuser with a reflective layer) may be used; or, an absorbing polarizer may be added; or, a birefringent material may be included in the system.

Title
Backlighting system using a retroreflecting polarizer
Application Number
7/885281
Publication Number
5422756
Application Date
May 18, 1992
Publication Date
June 6, 1995
Inventor
Michael F Weber
Shoreview
MN, US
Agent
Eric D Levinson
Walter N Kirn
Gary L Griswold
Assignee
Minnesota Mining and Manufacturing Company
MN, US
IPC
G02B 5/30
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