Document Type

Thesis

Date of Award

9-30-1985

Degree Name

Master of Science in Electrical Engineering - (M.S.)

Department

Electrical Engineering

First Advisor

Raj Pratap Misra

Second Advisor

S. Pandey

Third Advisor

W. H. Warren Ball

Abstract

The purpose of this Thesis is to study the life of liquid crystal display devices as at present available in the market place. To accomplish this, accelerated tempera-ture conditions at 77°C and 85°C were used.

During the last few years, there has grown a tremendous interest in wide range temperature operating and fast LCDs. It is therefore important to understand how LCDs behave under these conditions.

The reliability of a liquid crystal display is usually measured in terms of a quantative degradation in electrical performance and a degradation in visual appearance. The degradation in visual appear6knce may manifest itself as a misalignment of fluid molecules, resulting in blemishes or exhibiting an 'on' appearance when not biased or lowering the clarity.

A substantial increase in the current drawn by the LCDs or a short circuit between the display segments is considered as a failure of the device.

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