Preliminary Study of Field Sequential Fullcolor Liquid Crystal Display using Polymer Stabilized Ferroelectric Liquid Crystal Display

Abstract

Using a side-chain mesogenic polymer stabilized ferroelectric liquid crystal display (PS-FLCD) cell together with a two-dimensional array of red, green and blue light-emitting diodes (LEDs) as a modulated back light unit, we constructed a field sequential fullcolor (FSC) LCD. The PS-FLCD used in this research exhibits a high contrast ratio (230:1) with thresholdless monostability, grayscale capability, and a fast response speed (τ=40 µs). In the present research it is taken the advantages of the favorable characteristics of the PS-FLCD for implementing a FSC-LCD that has an 8×8 matrix format. The fabricated FSC-LCD, which is operated at the frame rate of 330 Hz, is shown to exhibit an excellent color gamut, color grayscale, and smearless moving color bars.

Electro-optical properties of an orthoconic liquid crystal mixture (W-182) and its molecular dynamics

“…By using the same equipment, we measured the color coordinate using glass color filters designed specifically for each charge- dispersion was achieved for CS-4001 filled cell, but a small deviation of white light toward the green color for W-182 filled cell was noticed. 18 Both the tilt angle ͑ ͒ and the spontaneous polarization ͑P S ͒ were measured by using 4 m cell filled with W-182 orthoconic mixtures. For the measurement of tilt during heating, an ac voltage of 30V PP with 100 mHz frequency was used and for P S measurement, 60V PP with 10 Hz frequency was used as an input signal, employing a FLC Electronics voltage amplifier F10A and HP33120A signal generator.…”

Viewing angle control and fast switching of a hybrid-aligned liquid crystal cell using a vertical bias field

“…A fast-response time is one of the most critical requirements for most display applications because it helps reduce the motion blur and enhance the optical efficiency. Moreover, submillisecond switching is required to implement the field sequential color (FSC) technology, which can triple the optical efficiency and resolution of liquid crystal displays (LCDs) [1,2]. Meanwhile, for the protection of personal or confidential information, devices with a narrow viewing angle (NVA) are strongly required.…”

High-Speed Response of Liquild Crystals Using Polymer Stabilization

“…The FSC system is based on the temporal color method in which RGB color backlights are turned on sequentially and LC device is used as an optical shutter (Fig. 2) [1][2][3][4][5]. In comparison to conventional LCDs which use CF, the FSC-LCDs have the following potential advantages since no CF is used: high luminance, low power consumption, high resolution, simplicity of fabrication, and simplicity of the driving circuit.…”