Display drive circuit

Abstract

A display drive circuit formed in a chip manufactured by a chip on glass implementation, which is connected to lead lines formed on a glass substrate, includes a rectangularly-shaped substrate, a power supply line formed on the substrate, the line being elongated along the longer side of the rectangular shaped substrate, a plurality of output terminals formed on the rectangular shaped substrate, the output terminal being disposed along the power supply line, a plurality of bump electrodes, each of which connects one of the output terminal to one of the lead lines, switches disposed along the power supply line, each of which is connected between the one of the output terminals and the power supply line, a single power supply terminal, which is disposed near the middle of the power supply line, being connected to the power supply line.

1 . A display drive circuit formed in a chip manufactured by a chip on glass implementation, which is connected to lead lines formed on a glass substrate, comprising:
 a rectangularly shaped substrate;   a power supply line formed on the substrate, the line being elongated along the longer side of the rectangularly-shaped substrate;   a plurality of output terminals formed on the rectangularly-shaped substrate, the output terminal being disposed along the power supply line;   a plurality of bump electrodes, each of which connects one of the output terminal to one of the lead lines;   switches disposed along the power supply line, each of which is connected between the one of the output terminals and the power supply line; and   a single power supply terminal, which is disposed near the middle of the power supply line, being connected to the power supply line.   
     
     
         2 . A display drive circuit as claimed in  claim 1 , wherein the single power supply terminal is disposed between the power supply line and the longer side of the rectangularly-shaped substrate. 
     
     
         3 . A display drive circuit as claimed in  claim 1 , wherein the power supply line is a ground line supplying the ground electric potential, and wherein the single power supply terminal is a ground terminal supplying the ground electric potential. 
     
     
         4 . A display drive circuit as claimed in  claim 3 , wherein the bump electrodes are the first bump electrodes, further comprising a second bump electrode, which is connected to the ground terminal, wherein a drive current being reached to the ground terminal flows to the ground. 
     
     
         5 . display drive circuit formed in a chip manufactured by a chip on glass implementation, which is connected to lead lines formed on a glass substrate, comprising:
 a rectangularly-shaped substrate;   a power supply line formed on the substrate, the line being elongated along the longer side of the rectangularly-shaped substrate;   a plurality of output terminals formed on the rectangularly-shaped substrate, the output terminal being disposed along the power supply line;   a plurality of bump electrodes, each of which connects one of the output terminal to one of the lead lines;   switches disposed along the power supply line, each of which is connected between the one of the output terminals and the power supply line;   a first power supply terminal, which is disposed near the middle of the power supply line, being connected to the power supply line   a second power supply terminal, which is connected to one end of the power supply line; and   a third power supply terminal, which is connected to the other end of the power supply line,   wherein a contact resistance of the first power supply terminal is smaller than that of both the second power supply terminal and the third power supply terminal.   
     
     
         6 . A display drive circuit as claimed in  claim 5 , wherein each of the second and the third power supply terminals includes a respective plurality of the power supply terminals. 
     
     
         7 . A display drive circuit as claimed in  claim 6 , wherein the first power supply terminals includes a plurality of the power supply terminals. 
     
     
         8 . A display drive circuit as claimed in  claim 7 , wherein a size of each power supply terminal in the first power supply terminal is the same as that of each power supply terminal in the first and second power supply terminals, and wherein a number of the power supply terminal in the first power supply terminal is greater than that in both the second and the third power supply terminal. 
     
     
         9 . A display drive circuit as claimed in  claim 6 , wherein a number of the power supply terminal in the second power supply terminal is different from that in the third power supply terminal. 
     
     
         10 . A display drive circuit as claimed in  claim 7 , wherein each pitch between the power supply terminals in the first power supply terminal is greater than that in both the second and third power supply terminals. 
     
     
         11 . A display drive circuit as claimed in  claim 5 , wherein the power supply line is a ground line supplying the ground electric potential, and wherein each of the first, the second and the third power supply terminal is a ground terminal supplying the ground electric potential.