| Autor: |
Mizusaki, Masanobu, Miyashita, Tetsuya, Uchida, Tatsuo, Yamada, Yuichiro, Ishii, Yutaka, Mizushima, Shigeaki |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 7/1/2007, Vol. 102 Issue 1, p014904, 6p, 3 Diagrams, 9 Graphs |
| Abstrakt: |
The presence of ionic charges in a liquid crystal layer causes the generation of residual direct current (dc) voltage (Vrdc) in a liquid crystal cell. Vrdc is one of the most important factors governing the image quality of liquid crystal displays, because the existence of Vrdc causes the image sticking phenomenon. We studied the generation mechanism of Vrdc based on a model of the adsorption and desorption of the ionic charges at the interface between the liquid crystal and alignment layer. In this paper, we propose three evaluation parameters, (i) saturated residual dc voltage, (ii) time to reach its saturation state, and (iii) relaxation time during the open circuit state after applying the external dc voltage, for effective evaluation of liquid crystal and alignment layer materials from the viewpoint of the improvement of the image sticking. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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