Patent ID: 11917732
Assignee: PIXART IMAGING INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The optical device of claim 5, wherein the control circuit further comprises:
a second capacitor, having a first end coupled to a second supply voltage level lower than the first supply voltage level and having a second end;
a second impedance unit, having a first end coupled to the second end of the second capacitor and having a second end, a second impedance value of the second impedance unit is smaller than an impedance value of the first impedance unit; and
a second transistor, coupled between the second end of the second impedance unit and the specific signal port;
wherein when the specific sequence of digital signals are received by and then transmitted from the specific signal port to control the plurality of addressable RGB LED units, the second transistor is disabled by a control signal; and, when the specific signal port is used to receive the output control signal generated from the input interface circuit, the second transistor is enabled by the control signal.