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Wireless keyboard with improved radiation transmission

  • US 20040201953A1
  • Filed: 04/08/2003
  • Published: 10/14/2004
  • Est. Priority Date: 04/08/2003
  • Status: Active Grant
First Claim
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1. A keyboard capable of operating with a radiation-based signal receiver of a computing apparatus, said keyboard comprising:

  • a housing;

    a user input device mounted in the housing, the user input device comprising a plurality of user-operable keys;

    a processor for generating a corresponding key signal responsive to key-in of one of the keys;

    a radiation-based signal transmitter, set on the housing, for converting the corresponding key signal into a radiation beam and emitting the radiation beam;

    a user-adjustable guiding device having a first end and a second end, the first end abutting on the radiation-based signal transmitter such that the radiation beam emitted by the radiation-based signal transmitter enters into the guiding device from the first end and transmits out from the second end, the radiation beam transmitting out from the second end of the guiding device having a covered zone; and

    wherein the second end of the guiding device approaches the radiation-based signal receiver by adjusting the guiding device when said keyboard operates with the radiation-based signal receiver, such that the radiation-based signal receiver is located in the covered zone of the radiation beam.

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