Title:
LIGHT-GUIDE LIGHTS SUITABLE FOR USE IN ILLUMINATED DISPLAYS
Document Type and Number:
WIPO Patent Application WO2003029723
Kind Code:
A3
Abstract:
A light-guide light (1) suitable for use in illuminated displays and signs comprises a housing (3) defining an optical cavity having first and second generally parallel major faces (5, 6), and a light source (11) positioned to direct light into the optical cavity from one side. The first major face (5) comprises a material (for example, a prismatic film) having coefficients of reflection and transmission that vary with the angle at which light is incident on the material. The second major face (6) comprises a narrow-scattering reflective material having a reflectance of at least 85 %, for example a highly-efficient reflective material provided with a suitable textured pattern.
Inventors:
WRIGHT JOHN C (GB)
LEA MICHAEL C (GB)
LEA MICHAEL C (GB)
Application Number:
PCT/US2002/031419
Publication Date:
July 22, 2004
Filing Date:
October 03, 2002
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
WRIGHT JOHN C (GB)
LEA MICHAEL C (GB)
WRIGHT JOHN C (GB)
LEA MICHAEL C (GB)
International Classes:
F21V8/00; G09F13/16; G09F13/18; F21Y103/00; (IPC1-7): F21V8/00; G09F13/18; G09F13/16
Domestic Patent References:
| WO2001071248A1 | 2001-09-27 |
Foreign References:
| US6259561B1 | 2001-07-10 |
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