Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Patent
1997-06-26
1999-04-06
Sikes, William L.
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
349 41, 349 49, 257909, 257 8, 257 59, 345 84, 345 90, G02F 1136, G02F 11343, G02F 1135, G02G 334
Patent
active
058925589
ABSTRACT:
An active matrix LCD employs a two-terminal or three-terminal switch structure employing an electrically conductive wire. The wire has an insulating layer thereon forming a wire structure. The wire structure is placed in a groove in a transparent substrate and an electrode layer is deposited on the insulating layer at spaced intervals to form an array of diodes connected in parallel. By applying a suitable voltage to the wire, all of the diodes in parallel are turned on to charge the electrodes to desired electrical potentials on one side of the liquid crystal material. An array of electrodes matching the position of the diodes on the other side of the liquid crystal material are charged to the desired potentials in order to control the color and brightness of the display by controlling the light transmittance of the liquid crystal cells between the two sets of electrodes. In another embodiment, a three-terminal switch device is used instead, where the switch includes an insulating layer on a conductive wire and a semiconductor layer on top of the insulating layer. A conductive layer is then formed on top of the semiconductor layer to provide a source and a drain electrode with the wire acting as the gate of an array of transistors. When the common gate of the transistors is at On potential, the drain electrodes may be charged to the desired potentials in order to control the color and brightness of the display.
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Ge Shichao
Ge Yiping
GL Displays, Inc.
Parker Kenneth
Sikes William L.
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