Patent ID: 6961042

Claim:
A liquid crystal display device comprising: a plurality of first and second vertical scanning lines and a plurality of horizontal scanning lines arranged on a substrate in a matrix form; a pixel signal line arranged on the substrate proximate the first vertical scanning lines; and a plurality of pixels, each pixel being located at a crossing point of corresponding first and second vertical scanning lines and a corresponding horizontal scanning line, each pixel including a pixel element changing in light interaction characteristics in response to a potential applied to a pixel electrode of the pixel element, a first switching unit connected to the corresponding horizontal scanning line and switched in response to a signal applied to the corresponding first vertical scanning line, a control capacitor element for receiving and holding a control signal from the corresponding horizontal scanning line, when connected to the corresponding horizontal scanning line by the first switching unit, a second switching unit selectively connecting the pixel signal line to the pixel electrode to write the potential on the pixel signal line onto the pixel element, the second switching unit being connected to the control capacitor element and being switched by the potential on the control capacitor element, a third switching unit selectively connecting a reference line to the pixel electrode to write the potential on the reference line onto the pixel element, the third switching unit being connected to the control capacitor element and being switched by the potential on the control capacitor element, the second and third switching units having complementary states in response to a potential on the control capacitor element, and a fourth switching unit switched by a potential on the corresponding second vertical scanning line and connected in series between the pixel electrode and each of the second and third switching units.