Thin-film transistor circuit and image display

An image display comprising:

• a plurality of display-use pixels that are formed in a matrix shape;
• video-signal applying means for applying a video signal to the pixels for each line;
• and
• writing-control means for controlling a writing process of the video signal to the pixels for each row,
• wherein at least either the video-signal applying means or the writing-control means includes a thin-film transistor circuit comprising:
• a plurality of thin-film transistors that are formed on an insulating substrate, each thin-film transistor having a gate electrode and an active layer;
• and
• a conductive electrode that is commonly installed in each of the thin-film transistors in such a manner as to face a gate electrode with a channel region that is formed inside the active layer located in between, the conductive electrode being subjected to a constant voltage.

An image display comprising:

• a plurality of display-use pixels that are formed in a matrix shape;
• video-signal applying means for applying a video signal to the pixels for each row;
• and
• writing-control means for controlling a writing process of the video signal to the pixels for each line,
• wherein at least either the video-signal applying means or the writing-control means includes a thin-film transistor circuit comprising:
• a plurality of thin-film transistors that are formed on an insulating substrate and that are classified into groups based upon predetermined attributes, each thin-film transistor being provided with a gate electrode and an active layer;
• and
• a plurality of conductive electrodes that are commonly installed in each group of the thin-film transistors in such a manner that each faces the gate electrode with a channel region that is formed inside the active layer located in between, the conductive electrodes being subjected to constant voltages, each of which is different from the others.