Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard
Patent
1995-03-03
1998-02-10
Liang, Regina D.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Including keyboard
341 27, G09G 500
Patent
active
057174288
ABSTRACT:
Disclosed is a portable computer keyboard capable of operation in three distinct modes: stand-alone mode, automatic mode and a conventional mode. In stand-alone mode, information entered is stored in an on-board memory buffer, and may be edited by using a set of predetermined editing keys in conjunction with a display mounted on the device. In automatic mode, the contents of the on-board memory buffer are transmitted, by a keystroke emulation technique, to an attached host computer via a conventional keyboard connector cable. In the conventional keyboard mode, keystrokes entered are transmitted directly to an attached host computer. The keyboard of the invention may be operated in connection with a plurality of different host computers, and includes host detection and host identification to facilitate operation with such a plurality of different host computers. Also disclosed is a power conservation technique where the device enter a dwell or sleep mode when waiting to process keystrokes.
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Barrus Joseph P.
Kothari Ketan D.
Intelligent Peripheral Devices, Inc.
Liang Regina D.
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