CA2257000A1 - Traffic control system using light emitting diodes - Google Patents
Traffic control system using light emitting diodesInfo
- Publication number
- CA2257000A1 CA2257000A1 CA002257000A CA2257000A CA2257000A1 CA 2257000 A1 CA2257000 A1 CA 2257000A1 CA 002257000 A CA002257000 A CA 002257000A CA 2257000 A CA2257000 A CA 2257000A CA 2257000 A1 CA2257000 A1 CA 2257000A1
- Authority
- CA
- Canada
- Prior art keywords
- vehicle
- control system
- emitting diodes
- light emitting
- traffic control
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Landscapes
- Traffic Control Systems (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
A traffic control system (10) including a road (12), a vehicle (14) traveling on the road (12) and a traffic light assembly (16) operatively associated with the road (12) is disclosed. The traffic light assembly (16) comprises at least one traffic light or lamp means (18). The traffic light (18) includes a plurality of light emitting diodes (24) for projecting light rays to the vehicle (14) to provide the driver of the vehicle (14) with a visual signal. The system (10) further comprises a transmitter (20) including a power supply (30) and a modulator (72) for turning the diodes (24) on and off at a rate that is imperceivable to humans while optically transmitting information to a receiver (22) disposed on the vehicle (14).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/386,816 US5633629A (en) | 1995-02-08 | 1995-02-08 | Traffic information system using light emitting diodes |
US08/386,816 | 1995-02-08 | ||
CA002169037A CA2169037C (en) | 1995-02-08 | 1996-02-07 | Traffic control system using light emitting diodes |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002169037A Division CA2169037C (en) | 1995-02-08 | 1996-02-07 | Traffic control system using light emitting diodes |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2257000A1 true CA2257000A1 (en) | 1996-08-09 |
CA2257000C CA2257000C (en) | 2002-06-11 |
Family
ID=25678332
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002257000A Expired - Fee Related CA2257000C (en) | 1995-02-08 | 1996-02-07 | Traffic control system using light emitting diodes |
CA002254271A Abandoned CA2254271A1 (en) | 1995-02-08 | 1996-02-07 | Traffic control system using light emitting diodes |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002254271A Abandoned CA2254271A1 (en) | 1995-02-08 | 1996-02-07 | Traffic control system using light emitting diodes |
Country Status (1)
Country | Link |
---|---|
CA (2) | CA2257000C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2399206A (en) * | 2003-03-05 | 2004-09-08 | Qinetiq Ltd | Signalling system with visible and non visible signals |
-
1996
- 1996-02-07 CA CA002257000A patent/CA2257000C/en not_active Expired - Fee Related
- 1996-02-07 CA CA002254271A patent/CA2254271A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA2254271A1 (en) | 1996-08-09 |
CA2257000C (en) | 2002-06-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |