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US 5,335,254 AGranted
Shift register system for driving active matrix display
AssigneeIndustrial Technology Research Institute (Taiwan)
InventorsNang-Ping Tu, Ming-Daw Chen
Life of this patent
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Abstract
A clock control circuit for sequentially enabling the clock input terminal of a number of groups of shift register stages for reducing the power consumption. The groups are seccessively activated, and the groups currently not in operation are made not to consume power. During changeover between adjacent groups of shift register stages, the clocks for the different groups overlap to insure stable operation.
Claims11
A shift register system for outputting a multiplicity of sequential control signals, comprising:
- more than one group of shift registers,
- each said group having a clock signal for shifting data signal in said group;
- a clock control circuit for producing more than one said clock signal for applying to more than one said group sequentially,
- each clock signal having a number of clock pulses which is more than the number of shift register stages in each said group to produce overlapping clock pulses with the clock pulses of adjacent groups.
1 more element
Dependencies are inferred from the claim text.