Browsing by Author "Lin, KW"

Now showing 1 - 6 of 6

A new illumination optical system for liquid crystal projectors
(1997)
Chang, CM
;
Lin, KW
;
Chen, KV
;
Shieh, HPD
;
交大名義發表
A high efficient illumination optical system is designed to generate;In uniform and rectangular light source for liquid crystal light valve projectors. A short are and an optimized reflector design enable the total system to be highly efficient while a rectangular-pillar-like glass rod is used to transform a circular beam into a uniform and rectangular cross-section one. The optical system from the light source through the projection optimized to achieve optical efficiencies of 57% and uniformity of 70%.
Analyses of the operation of in-plane switching display mode of liquid crystal display
(1997)
Yoo, JC
;
Lin, KW
;
Shieh, HPD
;
交大名義發表
;
光電工程學系
The IFS mode of LCD has wide viewing angle compared with TN mode, but requires a higher driving voltage to reach a maximum transmittance. The electro-optical properties of TPS mode are complicated and can not be fully revealed by an analytic form. In this letter, the electro-optical properties of in-plane switching mode mere analyzed by LC continuum theory to achieve a maximum transmittance at a low operating voltage.
Analysis of capacitance-voltage characteristics for two-dimensional multi-conductor in liquid crystal displays
(1996-04-22)
Lin, KW
;
Shieh, HPD
;
Su, FCD
;
光電工程學系
;
Department of Photonics
The capacitance voltage characteristics for the two-dimensional multi-conductor in liquid crystal displays (LCDs) are numerically derived by the method of successive over relaxation (SOR). The nonlinear and anisotropic properties of dielectric constant in the LC cell depend on the orientation of LC molecules under the influence of inhomogeneous electric field. An LC continuum theory implemented by tensor takes elastic anisotropy and inhomogeneous electric field into consideration to calculate the two-dimensional molecule orientations and potential distribution in LCDs. The dependence of capacitance on applied voltages and the geometric of LC cell is quantitatively described, Nonlinear capacitance results in capacitive coupling which causes flicker and adversely degrades image retention in LCD. (C) 1996 American Institute of Physics.
Analysis of the operation of mixed-mode twisted nematic cells
(1997-01-01)
Lin, KW
;
Yoo, JC
;
Shieh, HPD
;
光電工程研究所
;
Institute of EO Enginerring
Analysis of mixed-mode twisted nematic (MTN) cells in one- and two-dimension simulation are presented. Two-dimensional simulation reveals that the light leakage in the region of the reverse tilt domain in MTN cells reduces the contrast ratio with a novel method by adding a bias voltage onto Silicon substrates, the light leakage can be suppressed and the open ratio of the cell is greatly improved.
Analysis of the operation of mixed-mode twisted nematic cells
(1997-01-01)
Lin, KW
;
Yoo, JC
;
Shieh, HPD
;
交大名義發表
;
光電工程學系
Analysis of mixed-mode twisted nematic (MTN) cells in one- and two-dimension simulation are presented. Two-dimensional simulation reveals that the light leakage in the region of the reverse tilt domain in MTN cells reduces the contrast ratio with a novel method by adding a bias voltage onto Silicon substrates, the light leakage can be suppressed and the open ratio of the cell is greatly improved.
Fabrication of microfluidic devices using dry film photoresist for microchip capillary electrophoresis
(2006-04-14)
Tsai, YC
;
Jen, HP
;
Lin, KW
;
Hsieh, YZ
;
應用化學系
An inexpensive, disposable microfluidic device was fabricated from a dry film photoresist using a combination of photolithographic and hot roll lamination techniques. A microfluidic flow pattern was prefabricated in a dry film photoresist tape using traditional photolithographic methods. This tape became bonded to a poly(methyl methacrylate) (PMMA) sheet with prepouched holes when passed through a hot roll laminator. A copper working electrode and platinum decoupler was readily incorporated within this microchip. The integrated microchip device was then fixed in a laboratory-built Plexiglas holder prior to its use in microchip capillary electrophoresis. The performance of this device with amperometric detection for the separation of dopamine and catechol was examined. The separation was complete within 50 s at an applied potential of 200 V/cm. The relative standard deviations (RSD) of analyte migration times were less than 0.71%, and the theoretical plate numbers for dopamine and catechol were 3.2 x 10(4) and 4.1 x 10(4), respectively, based on a 65 min separation channel. (c) 2005 Elsevier B.V. All rights reserved.