Modulation/demodulation apparatus and information processing apparatus

DETAILED DESCRIPTION In view of the above-described status of the art, it is an object of the present invention to provide a modulation/demodulation system or apparatus and an information processing system or apparatus which is composed of a small number of component parts and small-sized and which renders it possible to effect data communication between personal computers and between a personal computer and a peripheral equipment or to effect remote control of an electronic equipment, such as a TV receiver.
The present invention provides a modulation/demodulation apparatus comprising modulation means for modulating transmission data in accordance with a predetermined modulation system, changeover means for changing over and selecting modulated signals from the modulation means or transmission data, and IR light emitting means for emitting the IR light modulated by modulated signals or by the transmission data as selected by the changeover means.
The present invention also provides an information processing apparatus comprising central processing means having first and second operating modes and adapted for generating transmission data, modulating means for modulating the transmission data from the central processing means, changeover means for changing over and selecting modulated signals from the modulating means or the transmission data, and IR light emitting means for outputting IR light modulated by the modulated signals or by the transmission data as selected by the changeover means, said central processing means controlling the changeover means for selecting the modulated signals from the modulating means or the transmission signals in the first operating mode and in the second operating mode, respectively.
The IR light emitting means of the modulation/demodulation apparatus and the information processing apparatus according to the present invention include at least two IR light emitting devices outputting IR rays of different wavelengths.
The modulation/demodulation apparatus according to the present invention outputs IR light rays modulated by modulated signals modulated in accordance with a predetermined modulation system, such as FSK modulation system, or by transmission data, such as remote control signals