Shift register
First Claim
1. A shift register having a plurality of stages connected to each other in cascade to be scanned in a bilateral direction, each of said plurality of stages comprising:
- a charger that charges a first supply voltage into a first node in response to a clock signal;
a discharger that discharges the first node in response to a first start pulse or a second start pulse;
a scan direction controller connected between the charger and the discharger to discharge the first node into a different path in response to a scan direction control signal;
output means that outputs any one of said first and second supply voltages as anoutput signal in response to a voltage at the first node; and
latch means that latches said output signal using said output signal and a clock signal inverted from said clock signal to feed back the latched output signal to the first node.
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Accused Products
Abstract
A shift register having a simple configuration and improved response and power consumption is disclosed. In the shift register, a plurality of stages are connected to each other in cascade and scanned in a bilateral direction. In the stages, a charger charges a first supply voltage into a first node in response to a clock signal. A discharger discharges the first node in response to a first start pulse or a second start pulse. A scan direction controller is connected between the charger and the discharger to discharge the first node into a different path in response to a scan direction control signal. An output part outputs any one of said first and second supply voltages as an output signal in response to a voltage at the first node. A latch part latches said output signal using said output signal and a clock signal inverted from said clock signal to feed back the latched output signal to the first node.
18 Citations
17 Claims
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1. A shift register having a plurality of stages connected to each other in cascade to be scanned in a bilateral direction, each of said plurality of stages comprising:
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a charger that charges a first supply voltage into a first node in response to a clock signal; a discharger that discharges the first node in response to a first start pulse or a second start pulse; a scan direction controller connected between the charger and the discharger to discharge the first node into a different path in response to a scan direction control signal; output means that outputs any one of said first and second supply voltages as an output signal in response to a voltage at the first node; and latch means that latches said output signal using said output signal and a clock signal inverted from said clock signal to feed back the latched output signal to the first node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification