| 摘要 |
<p>PURPOSE:To obtain a uniform display in a screen by varying the channel length and channel width of thin film transistors(TFT), formed on an insulating substrate, in the display screen. CONSTITUTION:When liquid crystal 4 is driven, the life should be prevented from becoming short by inverting the polarity of an applied voltage at a constant period without fail. The polarity is inverted in each one-vertical-scanning period. Even when the TFTs(thin film transistor) 2 formed on the insulating substrate 1 are off, charges accumulated in display electrodes 3 slightly leak to data electric conductors 7 through the TFTs 2. The amount of leaking charges is smaller and smaller as the channel length is longer and longer and the channel width is narrower and narrower. For the purpose, the channel length and channel width of the TFTs 2 are varied in the display screen. Consequently, the leakage of charges from the display electrodes 3 to the data electric conductors 7 can be equalized.</p> |
