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Portable radio terminal with infrared communication function, infrared emission power controlling method between portable radio terminal and apparatus with infrared communication function

  • US 6,525,854 B1
  • Filed: 12/23/1998
  • Issued: 02/25/2003
  • Est. Priority Date: 12/24/1997
  • Status: Expired due to Fees
First Claim
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1. A portable radio terminal, detachably mountable on a vehicle-carried adapter, for infrared communication selectively with a vehicle-carried adapter as a first apparatus located within hailing distance, as a communication partner, and a second apparatus located remotely, as a communication partner, comprising:

  • an infrared communication section for transmitting and receiving signals in an infrared frequency band to and from a selected one of the vehicle-carried adapter and the second apparatus;

    communication-partner detection means for detecting the second apparatus, whichever is currently in infrared communication with said terminal, as the communication partner; and

    control means, responsive to the detection of said communication-partner detection means, for controlling said infrared communication section in such a manner that an emission power of said infrared communication section is normal enough to ensure infrared communication if the detected communication partner is the vehicle-carried adapter, and that the emission power of said infrared communication is higher than such normal emission power if the detected communication partner is the second apparatus.

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