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Content Provider | IEEE Xplore Digital Library |
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Author | Kitagawa, Kenji Toriyama, Kazuhisa Kanuma, Yoji |
Copyright Year | 1963 |
Abstract | This paper reports the reliability of twisted nematic liquid-crystal display for basic applications such as watches and calculators. We have studied significant stress factors such as voltage, temperature and humidity, and their corresponding failure modes. The main failure mode is LCD misalignment; many different modes appear corresponding to different stress conditions as well as material and process for the LCD. We have analyzed the accelerated test results by Weibull distribution, elucidated accelerating factors, and estimated life time. The life is inversely proportional to 1.78-2.45 power of applied voltage, depending upon misalignment modes. The distribution of life is well expressed by Weibull distribution with shape parameter between 2.5-3.0, and proportional to the square of coefficient of variation of life. We conclude that the acceleration factors could be determined and 99.9% of tested displays will live more than 10 years. The knowledge on reliability of LCD can be now applied to new fields of LCD, such as industrial use, home appliance, and automotive instruments. |
Sponsorship | IEEE Reliability Society |
Starting Page | 213 |
Ending Page | 218 |
Page Count | 6 |
File Size | 996811 |
File Format | |
ISSN | 00189529 |
Volume Number | R-33 |
Issue Number | 3 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 1984-08-01 |
Publisher Place | U.S.A. |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Liquid crystal displays Life estimation Stress Voltage Weibull distribution Watches Calculators Temperature Humidity Life testing Liquid crystal display Failure mode analysis Reliability evaluation |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering Safety, Risk, Reliability and Quality |
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