| 摘要 |
<P>PROBLEM TO BE SOLVED: To execute normal processing corresponding to signal light (modulated infrared light) which is outputted from a remote controller with a simple structure even under an environment in that there is noise light from a backlight source provided in a room lighting device or a liquid crystal display device. <P>SOLUTION: An optical filter 13 which attenuates light, the wavelength of which is equal or more than a specified wavelength width to the peak wavelength of a signal light, is provided on an incident path of the signal light transmitted to a first signal light photoreceptor device 13 placed on a lower side. An optical filter 23 which attenuates light, the wavelength of which is equal or less than a specified wavelength width to the peak wavelength of a signal light, is provided on an incident path of the signal light transmitted to a second signal light photoreceptor device 23. A controller 30 determines whether or not detection signals Sg1 and Sg2 that are outputted from the signal light photoreceptor devices 13 and 23 are regular signals corresponding to the signal light, and executes processing corresponding to detection signals that are determined to be the regular signals. <P>COPYRIGHT: (C)2009,JPO&INPIT |
