WO2009123932A3 - Traffic signal systems - Google Patents

Traffic signal systems Download PDF

Info

Publication number
WO2009123932A3
WO2009123932A3 PCT/US2009/038613 US2009038613W WO2009123932A3 WO 2009123932 A3 WO2009123932 A3 WO 2009123932A3 US 2009038613 W US2009038613 W US 2009038613W WO 2009123932 A3 WO2009123932 A3 WO 2009123932A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
brightness enhancement
traffic signal
film
signal systems
Prior art date
Application number
PCT/US2009/038613
Other languages
French (fr)
Other versions
WO2009123932A2 (en
Inventor
Yufeng Liu
Original Assignee
3M Innovative Properties Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Publication of WO2009123932A2 publication Critical patent/WO2009123932A2/en
Publication of WO2009123932A3 publication Critical patent/WO2009123932A3/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The present application relates to a traffic light including a light source from which propagates light rays and at least one layer of a structured brightness enhancement film and at least one layer of a light control film. The structured brightness enhancement film and the light control film are positioned adjacent to the light source such that a light ray emitted by the light source propagates through the brightness enhancement film and the light control film.
PCT/US2009/038613 2008-04-02 2009-03-27 Traffic signal systems WO2009123932A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4161908P 2008-04-02 2008-04-02
US61/041,619 2008-04-02

Publications (2)

Publication Number Publication Date
WO2009123932A2 WO2009123932A2 (en) 2009-10-08
WO2009123932A3 true WO2009123932A3 (en) 2010-01-07

Family

ID=41136075

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/038613 WO2009123932A2 (en) 2008-04-02 2009-03-27 Traffic signal systems

Country Status (1)

Country Link
WO (1) WO2009123932A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104574313B (en) * 2015-01-07 2018-01-09 新智认知数据服务有限公司 The red light color Enhancement Method and its strengthening system of traffic lights

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040109663A1 (en) * 2002-12-06 2004-06-10 Eugene Olczak Brightness enhancement film with improved view angle
US20050265029A1 (en) * 2004-06-01 2005-12-01 3M Innovative Properties Company Led array systems
US20070236911A1 (en) * 2005-12-22 2007-10-11 Led Lighting Fixtures, Inc. Lighting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040109663A1 (en) * 2002-12-06 2004-06-10 Eugene Olczak Brightness enhancement film with improved view angle
US20050265029A1 (en) * 2004-06-01 2005-12-01 3M Innovative Properties Company Led array systems
US20070236911A1 (en) * 2005-12-22 2007-10-11 Led Lighting Fixtures, Inc. Lighting device

Also Published As

Publication number Publication date
WO2009123932A2 (en) 2009-10-08

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