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Device control apparatus for hand-held data processing device

  • US 6,201,554 B1
  • Filed: 01/12/1999
  • Issued: 03/13/2001
  • Est. Priority Date: 01/12/1999
  • Status: Expired due to Term
First Claim
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1. A portable display device having a size suitable for hand-held use and including a displaying screen for displaying video images and audio circuitry for providing audio signals to a user, said portable display device comprising:

  • a manual input device mounted on the portable display device activatable by a user for placing the portable display device in any one of a plurality of modes of operation selected from the group consisting of paging, volume control, brightness control and zoom;

    a sensor mounted on the portable display device and configured to sense changes in tilt of the portable display device relative to a reference tilt established upon placing the portable display device in one of the plurality of modes of operation; and

    a control connected to the sensor and adapted to modify parameters associated with a mode of operation selected from the plurality of modes of operation in response to the sensor sensing tilt changes when the portable display is in the select mode of operation.

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