| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To emit blinking light without causing malfunction, with a light emitting medium for emitting light by electric power supplied by noncontact communication. <P>SOLUTION: This light emitting medium includes an antenna 21 for receiving an electromagnetic wave irradiated from an electric power supply source and for generating an electromotive force in response to the intensity of the electromagnetic wave; a constant-current circuit 43 for outputting a current in response to the electromotive force generated in the antenna 21; display electrodes 31a-31c constituting a light emitting part for emitting light by the supplied current, a bias circuit 37 connected in parallel to the display electrodes 31a-31c; and a switching control part 44 and a switch circuit 45 for supplying alternately the current output from the constant-current circuit 43 to the light emitting part 30 and the bias circuit 37. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
