Essential factors in high-duty FLC matrix display

Srivastava

et al. 2013

A novel composite photo-alignment layer for ferroelectric liquid crystal (FLC) displays is explored. The key technique is to introduce a functional liquid crystal polymer into a rewritable azo-dye material with proper mixing. Bearing good alignment quality derived from the azo-dye, the composite layer provides strong anchoring energy comparable to that of rubbed polyimide layers. Furthermore, by using a two-step exposure process, the composite layer shows much better stability than that with a pure azo-dye material.

Section: Introductionmentioning

confidence: 99%

P.98: Novel Composite Photo‐alignment Layer for Ferroelectric Liquid Crystal Display

Srivastava

et al. 2013

“…The LCD panel is controlled to modulate the transmission of each pixel at each field [3]. An FSC display does not need color filters and has the advantages of increased light transmission and higher spatial resolution [4]. The target response time for a field sequential color (FSC) displays should be less than 1 ms (240 Hz frame frequency) [5] to provide a high resolution, low power consumption and extended color gamut liquid crystal displays (LCD).…”

Section: Introductionmentioning

confidence: 99%

34.1: Deformed Helix Ferroelectric Display with Low Driving Voltage and Fast Response Time

Pozhidaev

Srivastava

et al. 2012

In this paper, the electrooptical behavior of deformed helix ferroelectric(DHF) liquid crystals is described. Fast response with low driving voltage is obtained. One of remarkable properties of DHF mode is frequency dependence of the electrooptical response time, which is really exists in our case. Experimental and simulation results are provided with good accordance. Variable anchoring energy is realized in experiment with photosensitive alignment material SD1. For the purpose of evaluate the influence of anchoring energy on alignment quality in DHF mode, the measurement of anchoring coefficient of alignment layer for short helix pitch FLC is proposed. The contrast ratio of 13000 with switching time of 113 μs is obtained at room temperature.

“…FLC were aligned with ordinary rubbing technique for many years [5]. However, due to its sensitivity to dust particles induced by rubbing, defects appears making difficult to get the good alignment quality and high contrast ratio [6].…”

Section: Introductionmentioning

confidence: 99%

P‐144: Electrooptic Response of FLC: Effect of Alignment Materials

Fan

et al. 2011

In this paper, parameters of ferroelectric liquid crystals (FLC) with different alignment materials, which include Nylon 6 with rubbing method, photoaligned azo‐dye layer SD1 and new photosensitive material from DIC, were investigated. The effects of alignment layer on contrast ratio, response time and switching of FLC are provided. Asymmetric boundary conditions, with only one of ITO surfaces is covered with the aligning layer while the other one is not, have been used for providing both high contrast ratio and defect free orientation. It is indicated that SD1 is suitable for FLC alignment, with which switching time of 65μs and contrast of 500:1 are obtained at room temperature, and switching time decreases with higher temperature.