DRIVING CIRCUIT FOR CHOLESTEROL LIQUID CRYSTAL DISPLAY

• Main Authors: Chun-Wei Chang, 張君維
• Other Authors: Shu-Chuan Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/42362234201457979432

碩士 === 大同大學 === 電機工程學系(所) === 99 === In this thesis, a driving circuit for a 4?e4 matrix cholesterol liquid crystal display is proposed. This design includes shift register, data latch, counter, digital logic circuit, switching register string, operation amplifier which has a high voltage output. The column and row’s HV outputs are switching twice in a clock period. The voltage difference between the two terminals of the cholesterol liquid crystal determines the gray level, which is controlled by a 4-bit DAC. The proposed cholesterol liquid crystal driver was simulated using TSMC 0.25μm HV process model with a 5V supply and 60V supply. The HV OPAMP is configured as an non-inverting amplifier with the gain controlled by the external resistors. The reference voltages of row’s driver are provided externally for flexibility. The overall layout area is 1517umX900um.