Study of the physics and chemistry of liquid crystal displays
1
Issued Date
1988
Copyright Date
1988
Resource Type
Language
eng
File Type
application/pdf
No. of Pages/File Size
xxi, 130 leaves : ill.
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Mahidol University
Bibliographic Citation
Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1988
Suggested Citation
Sukrit Tantrawong Study of the physics and chemistry of liquid crystal displays. Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1988. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/103438
Title
Study of the physics and chemistry of liquid crystal displays
Alternative Title(s)
การศึกษาทางกายภาพและเคมีของเครื่องแสดงภาพแบบผลึกเหลว
Author(s)
Advisor(s)
Abstract
The study of Liquid Crystal Displays (LCDs) was divided into two aspects, physical and chemical. The chemical study was concerned with the surface coating of transparent electrodes for LCDs devices. Comparison was made between rubbing of conduction transparent glass plate with woolen cloth and treating the surface with poly(vinyl alcohol) mixed with a coupling agent, tetraethoxysilane or sodium silicate. The results show no significant difference. A cell of LCDs consists of two treated transparent glass plates seperated by two 10 micrometers spacers. The cell was then filled with mixed liquid crystals containing a dichroic dye. Either a parallel or a 90 degrees twisted cell was obtained, depending on the rubbing direction of the treated surface of the glass plate. Physical tests were made to obtain the response time, stability and contrast of color with and without an electric field (on and off state). Appropriate conditions were first found, e.g., strength and frequency of applied electric field, by measuring the light absorption in the visible region. In addition, in order to avoid region of reverse twist, which destroys the homogeneity of LCDs, a study was made to find the concentration of chiral compound in liquid crystal giving rise to a suitable pitch for LCDs.
Description
Physical Chemistry (Mahidol University 1988)
Degree Name
Master of Science
Degree Level
Master's degree
Degree Department
Faculty of Science
Degree Discipline
Physical Chemistry
Degree Grantor(s)
Mahidol University