Energy Conversion Devices, Inc.

Ois Optical Imaging Systems, Inc.

Ovonic Imaging Systems, Inc.

Gregory L Hansell

Vincent D Cannella

Zvi Yaniv

Louis D Swartz

Robert R Johnson

Meera Vijan

Yair Bar-on

There are disclosed liquid crystal displays each having at least one pixel element formed on an insulative substrate including at least two conductive electrodes and liquid crystal display material disposed between the electrodes. The pixel elements further include at least a pair of isolation devices formed from a deposited semiconductor material which facilitates selective excitation of of the pixel elements and applied potential reversal across the electrodes during alternate display frames. The isolation devices can include a plurality of series connected diodes. The isolation devices can be formed as diode rings. A method of making the displays is also disclosed.

Liquid crystal displays operated by amorphous silicon alloy diodes

There are disclosed liquid crystal displays each having at least one pixel element formed on an insulative substrate including at least two conductive electrodes and liquid crystal display material disposed between the electrodes. The pixel elements further include at least a pair of isolation devices formed from a deposited semiconductor material which facilitates selective excitation of the pixel elements and applied potential reversal across the electrodes during alternate display frames. The isolation devices can include a plurality of series connected diodes. The isolation devices can be formed as diode rings. A method of making the displays is also disclosed.

Method of fabricating amorphous silican diode addressed liquid crystal

A quick testable subassembly with redundant isolation devices usable in a liquid crystal display has a pair of coplanar spaced apart electrode segments connected to one or more-isolation devices. Address lines are connected to the isolation devices or the electrodes. The isolation devices and electrical connections to the electrode segments can be quickly tested prior to assembly of a complete display. Redundant isolation devices are formed on the subassembly and inoperative isolation devices can be replaced by associated redundant isolation devices. A method of quickly testing the subassembly and of replacing inoperative isolation devices, and several alternate quickly testable subassembly geometries are also disclosed. A self-selecting redundant geometry and method are also disclosed.

High yield liquid crystal display and method of making same

A new and improved thin film field effect transistor and method provides such a transistor having increased operating frequencies and higher output currents. The transistor includes a gate electrode having a non-coplanar surface with respect to the substrate and a deposited semiconductor material overlying the gate electrode to form a current conductor channel between a source and drain. The length of the current conduction channel is determined by the thickness of the gate electrode which can be accurately controlled. As a result, short channel lengths are possible without high precision photolithography for high output currents and fast operating speeds. Further, a gate insulator is disposed between the gate and the deposited semiconductor. The gate insulator, which can be a gate oxide, can be annealed prior to the deposition of the deposited semiconductor to provide enhanced field effect mobilities. This further increases the transistor output currents and operating speeds.

Thin film transistor having an annealed gate oxide and method of making

Light influencing subassemblies and displays each having a structure in which all of the pixel electronic circuitry, including isolation devices where utilized, are located at one electrode side of each pixel electrode combination. The structure includes the subdivision of one pixel electrode into at least two spaced apart side-by-side electrode segments opposite a common electrode. The displays include light influencing material disposed between the segmented and common electrodes. The electrode segments further can include at least one isolation device coupled to at least one of the segments which facilitates selective excitation of the pixel elements and applied potential reversal across the electrodes during alternate display frames. The displays have an increased manufacturing yield, reduced capacitance and increased isolation. Also disclosed is a method of making the subassemblies and displays.

Displays and subassemblies having improved pixel electrodes

A new and improved thin film field effect transistor has increased operating current and speed. The transistor includes a drain, an insulator, and a source formed in layers and vertically arranged with respect to a substrate and each other. The drain, however, and source layers form a plurality of non-coplanar surfaces with respect to the substrate. The device further includes a deposited semiconductor material overlying the non-coplanar surfaces to form a plurality of current conduction channels between the drain and source. A gate insulator overlies the semiconductor material, and a gate electrode overlies the gate insulator. The devices can also include carrier injection structure including a doped semiconductor material electrically coupled to the drain, the source, and the deposited semiconductor material for increasing the injection of current conduction carriers in the current conduction channels.

Growing community of inventors

Ann Arbor, MI, United States of America

Gregory L Hansell