Title:
LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO2002039787
Kind Code:
A3
Abstract:
A light emitting device which includes at least a first light source which is connectable to an energy source, a second light source, detector means for detecting a failure of the first light source, and switch means, responsive to the detector means, for enabling the connection of the second light source to the energy source when the detector means detects failure of the first light source.
Inventors:
BRUWER FREDERICK JOHANNES (ZA)
Application Number:
PCT/ZA2001/000171
Publication Date:
August 01, 2002
Filing Date:
November 07, 2001
Export Citation:
Assignee:
AZOTEQ PTY LTD (ZA)
BRUWER FREDERICK JOHANNES (ZA)
BUTLER ALAN FREDERICK (GB)
BRUWER FREDERICK JOHANNES (ZA)
BUTLER ALAN FREDERICK (GB)
International Classes:
B60Q11/00; H05B37/03; H05B39/10; (IPC1-7): H05B33/08; H05B37/04; H05B39/10; H05B37/03; H01K1/64; B60Q11/00
Domestic Patent References:
| WO1999020085A1 | 1999-04-22 |
Foreign References:
| US5216328A | 1993-06-01 | |||
| US4495444A | 1985-01-22 | |||
| US4380718A | 1983-04-19 | |||
| US5430354A | 1995-07-04 | |||
| US4734625A | 1988-03-29 | |||
| US5061879A | 1991-10-29 | |||
| FR2634339A1 | 1990-01-19 | |||
| FR2376587A1 | 1978-07-28 | |||
| DE9012641U1 | 1990-11-08 |
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