Liquid crystal display device and method for manufacturing the same
View Patent ↗An object of the present invention is to protect exposed inspection pads with a conductive tape when the application of resin is ceased and to enhance the reliability of the inspection pads. A liquid crystal display device is provided with a transparent electrode formed on a superficial side of a CF board, a grounded electrode, an inspection pad and a switching device between the inspection pad and a signal line or a scanning line respectively formed in a terminal area a TFT board and a conductive tape that electrically connects the transparent electrode of the CF board, the grounded electrode and the inspection pad respectively of the TFT board.
1. A liquid crystal display device where a first substrate provided with a plurality of pixel electrodes arranged in a matrix, a plurality of thin film transistors connected to each pixel electrode, a plurality of signal lines, and a second substrate formed with a transparent electrode on a surface opposite to a surface facing to the first substrate, and liquid crystal is sealed between the both substrates, comprising:
a terminal area of the first substrate having
an inspection pad that are connected to the respective signal lines,
a plurality of terminals connected to the respective inspection pads,
a plurality of switching devices between the inspection pads and the signal lines, the switching devices switches the connection state of the inspection pads and the signal lines;
a conductive tape that electrically connects the transparent electrode of the second substrate and the inspection pads of the first substrate, and
a mark for a conductive tape stuck position.
2. The liquid crystal display device according to claim 1 , wherein some of the plurality of inspection pads are covered with the conductive tape; and some others are exposed.
3. The liquid crystal display device according to claim 1 , wherein the first substrate has a driver IC, the plurality of inspection pads are arranged at a position not overlapping with the driver IC, and the plurality of the switching devices are formed in the driver IC.
4. The liquid crystal display device according to claim 3 , comprising:
a terminal for supplying an electric potential to the switching devices for a closed state during inspection; and
a terminal for supplying an electric potential to the switching devices for an open state when it is the product.
5. The liquid crystal display device according to claim 4 , wherein electric potential of the switching device in the open state is supplied from the driver IC.