Light emitting diode circuit and arrangement and device

Details Light emitting diode circuit and arrangement and device Light emitting diode circuit and arrangement and device

2007-04-20

2011-12-13

Tan, Vibol (Department: 2819)

Electric lamp and discharge devices: systems

Electric switch in the supply circuit

C315S294000, C315S291000, C315S216000, C315S224000, C315S18500S

Reexamination Certificate

active

08076872

ABSTRACT:
Disclosed are light emitting diode circuits employing first sub-circuits including first light emitting diodes and connected in parallel with second sub-circuits including second light emitting diodes and switches for, in conducting states, switching on the second light emitting diodes and switching off the first light emitting diodes and for, in non-conducting states, switching off the second light emitting diodes and switching on the first light emitting diodes. The first sub-circuits and the second sub-circuits have different signal characteristics such as different minimum threshold voltages to be realized by using different kinds of light emitting diodes, by using different total numbers of serial light emitting diodes, or by adding threshold voltage elements to the first sub-circuits.

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