KR930020343A

KR930020343A - Driving method of ferroelectric liquid crystal display device

Info

Publication number: KR930020343A
Application number: KR1019920003561A
Authority: KR
Inventors: 김춘식; 한동희
Original assignee: 박경팔; 삼성전관 주식회사
Priority date: 1992-03-04
Filing date: 1992-03-04
Publication date: 1993-10-19
Also published as: KR940007504B1

Abstract

본 발명은 강유전성 액정표시소자에 관한 것으로 특히 강유전성 액정판넬에 인가하는 전압의 파형에 관한 것으로 강유전성 액정표시소자에 있어서 전압레벨이 -V〈-V2〈-V1〈0〈V1〈V2〈V인 관계가 있을때 데이타의 제1상태를 표시하고자 하는 경우에는 화면표시기간중 주사신호가 인가되는 경우에는 전압레벨이 -V,-V2,V2,V로 순차적으로 변환하고 잔여기간동안은 전압레벨이 -V1,V1을 교대로 변환되는 파형을 상기 액정판넬에 인가하고, 데이타의 제2상태를 표시하고자 하는 경우에는 화면표시기간중 주사신호가 인가되는 기간에는 전압레벨이 V,V2,-V2,-V로 순차적으로 변화하고 잔여기간에는 전압레벨이 -V1,V1으로 교대로 변환되는 파형을 상기 액정판넬에 인가하는 것을 특징으로 하는 강유전성 액정표시소자의 구동방법으로 화상의 콘트라스트를 개선하는 효과가 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ferroelectric liquid crystal display devices, and in particular, to waveforms of voltages applied to ferroelectric liquid crystal panels. If the first signal is to be displayed when the scan signal is applied during the screen display period, the voltage level is sequentially converted to -V, -V2, V2, V, and the voltage level is -V1 for the remaining period. In the case of applying a waveform of alternately converting V1 to the liquid crystal panel and displaying the second state of data, the voltage level is V, V2, -V2, -V during the period during which the scanning signal is applied during the screen display period. In order to improve the contrast of the image by a method of driving a ferroelectric liquid crystal display device, the waveform is sequentially applied to the liquid crystal panel. It works.

Description

Driving method of ferroelectric liquid crystal display device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 강유전성 액정표시소자의 액정판넬의 구조를 나타내는 단면도이다1 is a cross-sectional view showing the structure of a liquid crystal panel of a ferroelectric liquid crystal display device.

제2도는 제1도에서의 전극의 분포를 나타내는 사시도이다.2 is a perspective view showing the distribution of electrodes in FIG.

제3도는 강유전성 액정판넬에 있어서 인가되는 전압과 광투과율과의 관계를 나타낸 그래프이다3 is a graph showing the relationship between the voltage and the light transmittance applied in the ferroelectric liquid crystal panel

Claims

In a ferroelectric liquid crystal display device, when a voltage level is related to -V <-V2 < V1 < 0 < V1 < V2 < In this case, the voltage level is sequentially converted to -V, -V2, V2, V, and for the remaining period, a waveform in which the voltage level is alternately converted to -V1, V1 is applied to the liquid crystal panel and the second state of data is displayed. In this case, the waveform is sequentially changed in the voltage level to V, V2, -V2, -V in the period during which the scan signal is applied during the screen display period, and the voltage level is alternately converted to -V1, V1 in the remaining period. A method of driving a ferroelectric liquid crystal display device, characterized in that applied to the liquid crystal panel.

The method of driving a ferroelectric liquid crystal display device according to claim 1, wherein the voltage waveform applied to the liquid crystal panel is an alternating current signal alternately changed into -V1 and V1 during a screen display time during which data is not displayed.

The electrode structure having a mesh structure for applying the above-described voltage waveform to the liquid crystal panel, wherein the voltage level is 0 < V1 < V2 < V for the first electrode (COMMON electrode). When the display signal is applied during the screen display period, when the scan signal is applied, the voltage level is sequentially converted to 0, V1, V2, V, and the voltage level is changed to V2, V1 for the remaining period. In the case of applying the voltage waveform to be converted alternately and displaying the second state of data, the voltage level is sequentially converted to V, V2, V1, 0 in the period during which the scanning signal is applied during the screen display period, and the voltage in the remaining period. When a voltage waveform whose level is alternately converted between V2 and V1 is applied, and a voltage level has a relationship of 0 < V1 < V2 < V, the first screen of data is displayed. Scan signal during display period When applied, the liquid crystal panel displays a voltage waveform in which the voltage level is sequentially converted to V, V, 0, 0 corresponding to the voltage level of the first electrode, and the voltage level is alternately converted to V, O for the remaining period. In the case where the second signal is to be displayed and the second state of the data is to be displayed, the voltage level is sequentially changed to O, V, V, and 0 corresponding to the voltage level of the first electrode in the period during which the scanning signal is applied during the screen display period. A method of driving a ferroelectric liquid crystal display device, characterized by applying a waveform in which the voltage level is alternately converted into V and 0 in the remaining period.

The method of claim 3, wherein in the screen display period during which data is not displayed, an alternating current waveform in which the voltage level is alternately changed to V2 and V1 is applied to the first electrode, and the voltage level is V and O to the second electrode. A method of driving a ferroelectric liquid crystal display device, characterized by applying an alternating current waveform that is alternately converted.

※ Note: The disclosure is based on the initial application.