Patent ID: 6445371
Filing Date: 2002-09-03
Classification: G09G

Abstract:
A liquid crystal display device comprising:plural pixels provided in matrix form; plural video signal lines which apply pixel drive voltages to pixels arrayed along columns or rows of the matrix of the plural pixels; and a drive part which supplies the pixel drive voltages to the plural video signal lines, the drive part including plural video signal input parts which supply the pixel drive voltages to the respective video signal lines, each of the video signal input parts including: a first field-effect transistor; a first part which sets a voltage value of a control electrode of the first field-effect transistor to a voltage value obtained by correcting a common pixel drive voltage by a threshold voltage of the first field-effect transistor; a second part which sets the voltage value of the control electrode of the first field-effect transistor to a voltage obtained by adding a video signal voltage to the voltage value corrected by the first part; and a third part which supplies a voltage obtained by adding the video signal voltage to the common pixel drive voltage, to the video signal line as a pixel drive voltage, as well as to the first field-effect transistor, the voltage value of whose control electrode is set by the second part to the voltage obtained by adding the video signal voltage to the voltage value corrected by the first part.