Patent ID: 8587215

Claim:
A lighting device, comprising: a light panel comprising: first and second light panel power connections for receiving DC electrical power from a driver, and at least one organic light emitting diode (OLED) operatively coupled between the first and second light panel power connections to provide general lighting using current provided by the driver; an actuation detect circuit operatively coupled with the light panel to sense a perturbation in a voltage across the first and second light panel power connections or in a current flowing through the at least one OLED caused by a physical actuation of the at least one OLED by a user while the at least one OLED is providing general lighting, and to selectively provide at least one actuation signal based at least partially on the sensed perturbation, the actuation detect circuit comprising: an amplifier comprising an input and an output; a capacitance coupled between one of the first and second light panel power connections and the input of the amplifier; a comparator comprising: a first comparator input coupled with the output of the amplifier, a second comparator input coupled with a threshold voltage, and a comparator output with an output voltage set according to relative polarities of voltages at the first and second comparator inputs; a pulse detector operatively coupled with the comparator to detect the output voltage of the comparator output and to provide a pulse detector output based on the output voltage of the comparator output; and a latch operative to latch the pulse detector output to provide the at least one actuation signal.