Image display apparatus having gradation potential...

Details Image display apparatus having gradation potential... Image display apparatus having gradation potential...

2008-05-20

2008-05-20

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S100000

Reexamination Certificate

active

10851169

ABSTRACT:
A gradation potential generating circuit of a color liquid crystal display apparatus includes a first ladder resistor circuit having a relatively high resistance value and generating first to sixty-fourth gradation potentials by dividing a power supply voltage to apply them to first to sixty-fourth nodes, and a second ladder resistor circuit having a relatively low resistance value, activated during an initial predetermined period of a time period while a selected gradation potential is applied to a data line, and generating first to sixty-fourth gradation potentials by dividing the power supply voltage to apply them to first to sixty-fourth nodes, and 65 switches. Therefore, since the ladder resistor circuit having low resistance is activated in a pulsed manner, the data line can be charged/discharged at a high-speed with low current consumption.

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