Remote control system and remote control transmitter for use in the same

#The present invention relates to a system that handles data to be transmitted by an infrared remote control device for remote-controlling electronic apparatuses, and a remote control transmitter for use in the same.

#There are a great variety of conventional remote control transmitters (hereinafter referred to as “transmitter”) now available. Among those, a kind of transmitter capable of remote-controlling a plurality of electronic apparatuses has come into wide use, such as a universal transmitter, a single unit of which can remote-control a television and a video tape recorder, for instance, manufactured by one company for its own brand name.

#One example of the universal transmitter capable of remote-controlling a plurality of electronic apparatuses is a transmitter, which remotely controls a television and a video tape recorder equipped with a tuner. The transmitter is provided with operational keys for common use, having a function of controlling identical operations such as turning on and off, station selection, etc. In addition, the transmitter is so constructed that it generates an infrared ray signal in order to remotely control either of the television and the video tape recorder, when either one of them is selected by a separately provided TV/VTR selection switch.

#FIG. 1 is a schematic drawing depicting an infrared remote control system of a first exemplary embodiment of the present invention;

#FIG. 2 is a schematic drawing depicting a writing operation of a transmissive data into a nonvolatile memory with a remote control signal analyzing/writing device in accordance with the first exemplary embodiment of the present invention;

#FIG. 3 is a circuit diagram of a transmitter in accordance with the first exemplary embodiment of the present invention;

#Preferred embodiments of the present invention will be described hereinafter by referring to the accompanied drawings.

#FIG. 1 depicts a schematic drawing of a remote control system in accordance with a first exemplary embodiment of the present invention. Referring to FIG. 1, a reference numeral 11 represents a remote control signal analyzing/writing device, a reference numeral 21 represents a transmitter adapted to this system, and a reference numeral 41 represents an exclusive transmitter supplied with an electronic apparatus.

#A writing operation of a transmissive data into a nonvolatile memory according to the present exemplary embodiment will be described by referring to FIG. 2. The remote control signal analyzing/writing device 11 comprises; (1) a light receiving unit 15 comprising a PIN photodiode 12, a resister 13, an amplifier 14, and the like components for receiving an infrared ray signal and converting it into an electric signal,