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Electronic display system, electronic paper writing device, electronic paper and method for manufacturing the same

  • US 8,154,509 B2
  • Filed: 08/02/2007
  • Issued: 04/10/2012
  • Est. Priority Date: 08/04/2004
  • Status: Active Grant
First Claim
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1. A writing device that transmits an electromagnetic wave to a receiving device, the writing device comprising:

  • a first antenna unit;

    an equivalent load receiving unit; and

    a control unit; and

    a second antenna unit,the first antenna unit receiving the electromagnetic wave transmitted from the second antenna unit,the equivalent load receiving unit outputting a first signal, the first signal relating a first power of the electromagnetic wave, the first power relating a second power of electromagnetic wave that is received by the receiving device,the control unit controlling a third power of the electromagnetic wave to be transmitted from the second antenna unit based on the first signal.

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