Illumination control circuit using a photoreceptor built-in a remote control device
AssigneePioneer Electronic Corporation
InventorAkira Nagashima
Life of this patent
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Abstract
An illumination control circuit for an on-vehicle apparatus having an optical remote control device. The circuit has a photoreceptor built in the remote control device that receives a light signal for remote control of the on-vehicle apparatus as well as the ambient visible light in a passenger space of the vehicle. The photoreceptor outputs signals corresponding to both the ambient light and the remote control light signal entering the photoreceptor. The output of the photoreceptor is supplied to a low-pass filter that passes a direct current component and frequency components below a predetermined frequency to an illumination controller, which in turn controls the illumination of the on-vehicle apparatus in accordance with the output of the low-pass filter.
Claims4
An illumination control circuit for an on-vehicle apparatus having an optical remote control device, comprising:
- a photoreceptor built in the remote control device for receiving a light signal for remote control of the on-vehicle apparatus as well as visible lights in a passenger space of the vehicle, said photoreceptor outputting a remote control signal as well as a background component corresponding to the visible lights in the passenger space;
- a low-pass filter for receiving said background component to output a dc and frequency components below a predetermined frequency;
- and
- an illumination controller for controlling illumination of said on-vehicle apparatus in accordance with the output of said low pass-filter.
Dependencies are inferred from the claim text.