Liquid crystal display device having driving circuit

Claim 1

A liquid-crystal display device having a driving circuit, comprising: a first substrate (101, 202) on which a plurality of first electrodes (107, 205) are arrayed; a plurality of signal supplying lines (105, 205) which are electrically connected with said plurality of first electrodes on said first substrate and extended to the periphery of said first substrate so that terminal portions will be installed on at least one end thereof in order to supply driving signals to said first electrodes; a second substrate (101, 201) disposed to be separated from said first substrate at a predetermined gap and having at least one second electrode (115, 204) arranged to oppose said first electrodes; a sealing member (103, 203) arranged to enclose the area where said plurality of first electrodes inside the terminal portion on said first substrate are arrayed, and bonding said first substrate with said second substrate; a liquid crystal material (LC) sealed in the area enclosed by said first substrate, second substrate and sealing member; and a driving circuit means (118, 119, 220, 221) for generating the driving signal corresponding to the externally-supplied display control signal and for supplying the driving signal to at least one of said first and second electrodes; characterized in that said driving circuit means has a heat-resistant sub-substrate (118a, 119a, 222, 223), input terminals (122, 123, 228, 229) for the display control signal supplied from the outside, a driving circuit (120, 121, 224, 225) formed by connecting a plurality of thin-film transistors (120a, 121a, 224a, 225a) which use semiconductor having crystal structure, and generating the driving signal to be supplied to at least one of the first and second electrodes according to the inputted display control signal, and output terminals (120a, 121a, 224a, 225a) for the driving signal, said input terminals, said driving circuit, and said output terminals being mounted on said sub-substrate; and each output terminal of said driving circuit means and each terminal portion of said signal supplying lines formed on at least one of said first and second substrates are electrically connected with each other by connecting means (124, 220) for electrical connection.