Portable telecommunication device with removable electrophoretic display
First Claim
1. An improved electronic apparatus having a visual display, comprising:
- a detachable electrophoretic display assembly that includes an anode, cathode and grid electrode and at least one battery for maintaining a predetermined bias on said anode, cathode and grid electrode only when said electrophoretic display is detached from an external source of power;
a housing adapted to selectively receive said detachable electrophoretic display, said housing containing an external source of power for empowering said electrophoretic display and a display driver for producing predetermined images on said electrophoretic display, whereby the bias of said at least one battery prevents the movement of said predetermined images on said electrophoretic display without said display driver, when said electrophoretic display is detached from said housing.
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Accused Products
Abstract
The present invention is a modular electrophoretic display that can be selectively attached or detached from a larger assembly. The modular electrophoretic display includes a small, low voltage battery that provides a small bias to the anode, cathode and grid electrode of the electrophoretic display when no other power is present. As a result of the bias of the battery, the electrophoretic display is capable of retaining any image formed upon the display by the larger assembly. Consequently, different displays with differing images can be removed from, or added to, the larger assembly as needed. This promotes ease in photocopying the electrophoretic display and enables the display to be mailed, stored or otherwise handled without the loss of the image.
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Citations
18 Claims
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1. An improved electronic apparatus having a visual display, comprising:
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a detachable electrophoretic display assembly that includes an anode, cathode and grid electrode and at least one battery for maintaining a predetermined bias on said anode, cathode and grid electrode only when said electrophoretic display is detached from an external source of power; a housing adapted to selectively receive said detachable electrophoretic display, said housing containing an external source of power for empowering said electrophoretic display and a display driver for producing predetermined images on said electrophoretic display, whereby the bias of said at least one battery prevents the movement of said predetermined images on said electrophoretic display without said display driver, when said electrophoretic display is detached from said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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a housing having at least one window disposed therein; a transparent tactile pad disposed within said at least one window; a modular electrophoretic display capable of being removably received within said housing, wherein said electrophoretic display is positionable at a first orientation within said housing directly below said transparent tactile pad, whereby said electrophoretic display can be viewed through said transparent tactile pad; and image driver means coupling said conductive lines of said tactile pad and to said electrophoretic display is within said housing at said first orientation, wherein tactile engagement of the transparent tactile pad creates a corresponding image on said electrophoretic display; and means coupled to said electrophoretic display for preventing the movement of said corresponding image on said electrophoretic display when said electrophoretic display is removed from said housing. - View Dependent Claims (12, 13)
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14. A modular electrophoretic display for use in an electronic apparatus, wherein the electrophoretic display can be selectively detached from the electronic apparatus, said electrophoretic display comprising:
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anode lines, cathode lines and grid electrode lines; bias means for biasing said anode lines, cathode lines and grid electrode lines at predetermined voltage potentials to prevent the movement of a predetermined image previously produced on said electrophoretic display by said electronic apparatus when said electrophoretic display is selectively detached; and means for removing said predetermined voltage potentials when said electrophoretic display is coupled to said electronic apparatus. - View Dependent Claims (15, 16, 17, 18)
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Specification