Liquid crystal display device, method for fabricating the same, and portable telephone using the same
View Patent ↗A liquid crystal display device comprises a liquid crystal display panel and a semiconductor integrated circuit for driving and controlling the liquid crystal display panel. The number of input/output wires connected to I/O terminals (bonding pads) of the semiconductor integrated circuit is reduced so as to simplify wiring patterns of the I/O wires, whereby degrees of freedom in arranging the I/O wiring patterns are enhanced. The panel has a pair of insulating substrate, and the semiconductor integrated circuit is mounted on one of the paired substrates. The semiconductor integrated circuit has a mode terminal which is fixed to a power supply potential or to a reference potential during operation of the integrated circuit, and power supply dummy terminals connected to the power supply potential or reference potential inside the semiconductor integrated circuit. The wiring patterns formed on the paired insulating substrates connect the mode terminal to the power supply dummy terminals.
1. A semiconductor integrated circuit device for controlling and driving a liquid crystal display panel, the semiconductor integrated circuit device having long sides and short sides, comprising:
a plurality of first terminals which output a liquid crystal driving voltage;
a second terminal which receives one of a power supply potential and a reference potential from outside of said semiconductor integrated circuit device;
a third terminal connected to said second terminal by a wiring formed inside of said semiconductor integrated circuit device; and
a fourth terminal fixed to said one of said power supply potential and said reference potential via said third terminal during operation of said semiconductor integrated circuit device,
wherein the distance between the third terminal and the fourth terminal is shorter than the distance between said second terminal and said fourth terminal,
wherein said fourth terminal is a terminal to select different operational modes according to whether said power supply potential or said reference potential is received,
wherein said first terminals are arranged along one of said long sides,
wherein said second, third and fourth terminals are arranged along the other of said long sides, and
wherein each of said first, second, third and fourth terminals includes a bump.
2. A semiconductor integrated circuit device according to claim 1 , wherein said third and fourth terminals are arranged with respect to each other in adjacent portions of the other of said long sides.
3. A semiconductor integrated circuit device according to claim 1 , further comprising a plurality of said fourth terminals.
4. A semiconductor integrated circuit device according to claim 3 , wherein said third terminal is arranged between said fourth terminals.
5. A semiconductor integrated circuit device according to claim 1 , wherein said different operational modes are an I2C bus interface mode and a serial interface mode.
6. A semiconductor integrated circuit device according to claim 1 , wherein when the semiconductor integrated circuit device is mounted over a substrate for connecting to said liquid crystal display panel, said fourth terminal is connected to said third terminal via a wiring pattern formed on said substrate.
7. A semiconductor integrated circuit device according to claim 6 , wherein said substrate is formed of glass.
8. A semiconductor integrated circuit device according to claim 1 , wherein said bump is formed of a material including Au.