Title:
STN液晶表示装置の駆動回路
Document Type and Number:
Japanese Patent JP4591907
Kind Code:
B2
Abstract:
Provided is a super twist nematic (STN) liquid crystal display (LCD) driver which reduces power consumption. The STN LCD driver includes a reference voltage generating unit, a voltage boosting unit, a voltage control unit, a first common voltage generating unit, and a second common voltage generating unit. The reference voltage generating unit generates a reference voltage in response to an external voltage. The voltage boosting unit generates a boosting voltage by boosting the external voltage. The voltage control unit generates a first segment voltage and a second segment voltage which drive a segment electrode of the STN LCD panel in response to the reference voltage and the boosting voltage. The first common voltage generating unit drives a common voltage of the STN LCD panel in response to the external voltage, a ground voltage, and the first segment voltage and generates a first common voltage, the voltage level of which is higher than the voltage level of the first segment voltage, using a predetermined resistance ratio. The second common voltage generating unit drives a common voltage STN LCD panel in response to the external voltage, the ground voltage, and the first segment voltage and generates a second common voltage, the voltage level of which is lower than the voltage level of the first segment voltage, using a predetermined resistance ratio.
Inventors:
Kin Torai
Park
Park
Application Number:
JP2003386824A
Publication Date:
December 01, 2010
Filing Date:
November 17, 2003
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO.,LTD.
International Classes:
G02F1/133; G09G3/36; G09G3/20
Domestic Patent References:
| JP2002238243A |
Foreign References:
| WO1996021880A1 |
Attorney, Agent or Firm:
Kyosei International Patent Office