| Presentation | 1995/10/23 Effect of heat treatment of rubbed polymer surfaces on liquid crystal alignment K.Y. HAN, T. UCHIDA, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Liquid crystal (LC) molecules on a rubbed polymer alignment layer are oriented at some polar angle away from the surface. This angle (so called pretilt angle) is an important parameter which determines the electro-optical properties of liquid crystal devices. Therefore, it is necessary to study generation of pretilt angle and its stability. Several researchers study on this problem but the physical mechanism is not thoroughly under-stood. In the previous research, we investigated the relation between inclination angle of polymer molecules of rubbed alignment layer and pretilt angle of liquid crystal to study the mechanism of LC pretilt generation. As a result, we clarified that the generation on LC pretilt mainly depends on the average inclination angle of the surface polymer of alignment layer. Moreover we have investigated the effect of heat treatment of LC cell on pretilt angle and alignment of polymer surface by using various liquid crystals with different dielectric constants. From these results, we found that the LC pretilt angles are changed by heat treatment of LC cells, and that the larger the dielectric constant of LC is, the larger its change becomes. In this paper, we will discuss the mechanism of these effects of heat treatment on LC alignment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | liquid crystal / molecular alignment / pretilt angle / heat treatment / temperature dependence |
| Paper # | EID95-43 |
| Date of Issue |
| Conference Information | |
| Committee | EID |
|---|---|
| Conference Date | 1995/10/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Electronic Information Displays (EID) |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Effect of heat treatment of rubbed polymer surfaces on liquid crystal alignment |
| Sub Title (in English) | |
| Keyword(1) | liquid crystal |
| Keyword(2) | molecular alignment |
| Keyword(3) | pretilt angle |
| Keyword(4) | heat treatment |
| Keyword(5) | temperature dependence |
| 1st Author's Name | K.Y. HAN |
| 1st Author's Affiliation | Department of Electronic Engineering Faculty of Engineering, Tohoku University() |
| 2nd Author's Name | T. UCHIDA |
| 2nd Author's Affiliation | Department of Electronic Engineering Faculty of Engineering, Tohoku University |
| Date | 1995/10/23 |
| Paper # | EID95-43 |
| Volume (vol) | vol.95 |
| Number (no) | 335 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |