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Data processing terminal having support module and portable display module for liquid crystal display

  • US 4,720,781 A
  • Filed: 11/16/1984
  • Issued: 01/19/1988
  • Est. Priority Date: 11/30/1983
  • Status: Expired due to Fees
First Claim
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1. A data processing terminal incorporating a visual display unit (VDU), comprising:

  • (a) a support module, including;

    (i) a first central processor,(ii) a first memory connected to the first central processor for storing application programs for execution by said terminal,(iii) first control means for communicating commands to the first central processor, and(iv) an AC power supply for supplying operating power to the support module;

    (b) a portable display module, for use independently of the support module, including;

    (i) a second central processor,(ii) second control means for communicating command to the second central processor,(iii) a smectic liquid crystal flat panel display, comprising said visual display unit, having a plurality of electrically actuated picture elements, which flat panel display is for displaying a whole page of data at a time as a result of actuation of the corresponding picture elements,(iv) a touch sensitive overlay disposed over the flat panel display and connected to the second central processor for use in manipulating the contents of the display and for entering data when the display module is not attached to the support module,(v) a second memory connected to the second central processor for storing a number of said pages of data for presentation on said display,(vi) display interface means for controlling the actuation of said picture elements and thus the display of said data,(vii) a battery for supplying operating power to the display module; and

    (c) means for detachably connecting the display module to the support module to allow the first central processor to control the contents of the display when the display module is connected to the support module.

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