Electrical switching system

Details Electrical switching system Electrical switching system

H - Electricity

04

B

H04B 1/16 (2006.01) G01V 8/20 (2006.01)

Patent

CA 2053314

2053314 9102268 PCTABS00003 A switching system operated from switching areas in a housing of an electronic device includes first (15) and second (13) sets of ambient light sensors and switch sensing means (25, 23) secured in the housing. An ambient sensing circuit and averaging circuit means (34) connects to the first set of light sensors to produce a reference signal representing an average ambient light reaching the first set. A shielding sensing circuit means (32) couples to the second set of light sensors to produce a switch sensing signal in response to an operator shielding ambient light therefrom. A comparison means (34) coupled to the averaging and shielding sensing signal and the reference signal to provide an output after a predetermined delay, and a switch (35) connected to said comparison means performs at least one switching function in response to the output from the comparison means.

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