A Simple Technique for Measurement of the Voltage Dependent Capacitance of Pixels in Liquid Crystal Displays

نویسندگان

  • T. N. Ruckmongathan
  • Prabhjot Juneja
  • A. R. Shashidhara
چکیده

A technique for measuring the voltage dependent capacitance of pixels by using a low cost integrated circuit and some common laboratory equipments is proposed. The error in measurement ranges from 1 to 2% and this technique can be used for indirect measurement of various parameters of the liquid crystals.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Effects of Excitation Signal on the Resolution of the Liquid Crystal Capacitive Chemical and Biological Sensors

In this paper excitation characteristics of the Liquid Crystal (LC) capacitive chemical and biological sensor are examined and the optimum frequency and voltage range for the sensor interface are introduced. Interdigitated capacitor has been used for the sensor capacitance measurement and two different molecular orientations, homeotropic and homogenous, have been considered. The LC sensor capac...

متن کامل

Dynamic Characterization of a-Si TFT-LCD Pixels

A dynamic analysis of an amorphous silicon (a-Si) Thin-FilmTransistor-Liquid-Crystal-Display (TFT-LCD) pixel is presented using new a-Si TFT model and new Liquid Crystal (LC) capacitance models for SPICE simulators. This analysis is useful to all Active Matrix LCD designers for evaluating and predicting the performance of LCD’s. The a-Si TFT model is developed to simulate important a-Si TFT cha...

متن کامل

Nematic Polar Anchoring Strength Measured by Electric Field Techniques

We analyze the high-electric-field technique designed by Yokoyama and van Sprang @J. Appl. Phys. 57, 4520 ~1985!# to determine the polar anchoring coefficient W of a nematic liquid crystal-solid substrate. The technique implies simultaneous measurement of the optical phase retardation and capacitance as functions of the applied voltage well above the threshold of the Frederiks transition. We de...

متن کامل

Polar anchoring energy measurement of vertically aligned liquid-crystal cells

An electric-field method is developed for measuring the polar anchoring energy of vertically aligned nematic liquid-crystal cells. Both theoretical analyses and confirming experimental results are presented. Vertically aligned liquid-crystal cells with buffed polyimide alignment layers are used to investigate the measurement techniques. Based on the voltage-dependent transmittance of the liquid...

متن کامل

Study and Analysis of A Simple Self Cascode Regulated Cascode Amplifier

This article proposed a simple self cascode RGC amplifier configuration to increase the gain and bandwidth. The cascode amplifier eliminates the miller capacitance between input and output and facilitates high gain, high input and output impedance with high bandwidth. However, the cascode amplifier requires relatively high supply voltage for proper operation and it decreases the output voltage ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006