| 摘要 |
<p>PURPOSE:To improve the multi-gradation display capacity by providing a means by which an element having a switching function of each liquid crystal picture element is applied from the outside and a digital image signal corresponding to a displayed gradation level is converted into an analog voltage corresponding to its gradation level. CONSTITUTION:A source line 1 constitutes a train electrode for applying a digital image signal voltage of a time series from a source line driving circuit,a nd gate lines 21, 22 constitute a train electrode for opening and closing alternate ly conducting parts of a TFT 31 and a TFT 32 by applying an opening/closing control signal voltage of two phases synchronizing with the digital image signal voltage, respectively from a gate line driving circuit. The source line 1 and the gate lines 21, 22 are formed by crossing each other through an insulator, and connected to each TFT 31, 32. Also, a means for converting a digital image signal into an analog voltage at every liquid crystal picture element is provided, a gradation level is transferred to each liquid crystal picture element by the digital image signal, and it is converted into an analog voltage corresponding to the gradation level at every liquid crystal picture element. In such a way, the multi-gradation display can be executed.</p> |
