Communication system
AssigneeCanon Kabushiki Kaisha
InventorsMasao Kiguchi, Yuji Kurosawa
Life of this patent
Estimating the term…
Abstract
A communication system receives data from a portable device without using a conductor. The data-receiving side obtains electric power from the outside. The portable device obtains electric power from its internal power supply or the data-transmitting side.
Claims36
A communication system comprising a card-like device and a data receiving apparatus for receiving data from said card-like device,
- said data receiving apparatus comprising:
- communication means for communicating via a line on the basis of data received from said card-like device;
- obtaining means for obtaining electric power from the line;
- a first internal power supply for generating electric power independently of the electric power from the line;
- and
- first supply means for supplying said card-like device with electric power from a selected one of said obtaining means and said first internal power supply, and
- said card-like device comprising:
- transmission means for transmitting data to said data receiving apparatus without using a conductor;
- a second internal power supply for generating electric power independently of the electric power from said first supply means;
- and
- second supply means for supplying said transmission means with electric power from a selected one of said first supply means and said second internal power supply.
A communication system comprising a card-like device for transmitting a dial number and a communication apparatus for calling in accordance with the dial number transmitted from said card-like device,
- said communication apparatus comprising:
- sending means for sending a dialing signal to a line in accordance with the dial number transmitted from said card-like device;
- obtaining means for obtaining electric power from the line;
- a first internal power supply for generating electric power independently of the electric power from the line;
- and
- first supply means for supplying said card-like device with electric power from a selected one of said obtaining means and said first internal power supply, and
- said card-like device comprising:
- transmission means for transmitting the dial number without using a conductor;
- a second internal power supply for generating electric power independently of the electric power from said first supply means;
- and
- second supply means for supplying said transmission means with electric power from a selected one of said first supply means and said second internal power supply.
A communication apparatus comprising:
- communication means for performing communication via a line;
- photosensing means;
- and
- supply means for supplying said photosensing means with electric power from said line;
- wherein said communication means performs communication in accordance with a photosensed output from said photosensing means.
A communication apparatus comprising:
- reception means for receiving data photoelectrically;
- communication means for performing communication via a line, said communication means performing communication in accordance with the data received by said reception means;
- power supply means;
- and
- supply means for supplying said reception means with electric power from a selected one of said power supply means and the line.
Dependencies are inferred from the claim text.