US 2009/0262884 A1Published application

Switch set of bi-directional shift register module

AssigneeAu Optronics Corporation

InventorChung-Chun Chen

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Abstract

A switch set used in a bi-directional shift register circuit includes a plurality of switch devices. Each switch device is controlled by corresponding control signals to switch the direction of the input signal. One of the switch devices includes a first switch unit for transmitting a shift register signal from a previous shift register to a shift register according to a first control signal, a second switch unit for transmitting a shift register signal from a next shift register to the shift register according to a second control signal. The first and the second control signals have the same frequency as the clock signal of the shift register circuit.

Claims8

Dependent claims

A switch set for use in a bi-directional shift register module, the shift register module comprising a first shift register, a second shift register, and a third shift register, the second shift register coupled to the first shift register, the third shift register coupled to the second shift register, the shift register module sequentially transmitting shift register signals according to a first clock signal and an inversed clock signal of the first clock signal, the switch set comprising:

a first switch device, comprising:
a first control end for receiving a second clock signal;
a second control end for receiving an inversed clock signal of the second clock signal;
a third control end for receiving the second clock signal;
a first input end for receiving a start signal;
a second input end coupled to an output end of the second shift register;
a first output end coupled to an input end of the first shift register for coupling the first input end of the first switch device to the first input end of the first shift register when the second clock signal is at a first predetermined voltage;
and
a second output end coupled to the input end of the first shift register for coupling the second input end of the first switch device to the first input end of the first shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
a second switch device, comprising:
a first control end for receiving the inversed clock signal of the second clock signal;
a second control end for receiving the second clock signal;
a third control end for receiving the inversed clock signal of the second clock signal;
a first input end for receiving the start signal;
a second input end coupled to an output end of the second shift register;
a first output end coupled to an second input end of the first shift register for coupling the first input end of the second switch device to the second input end of the first shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the second input end of the first shift register for coupling the second input end of the second switch device to the second input end of the first shift register when the second clock signal is at the first predetermined voltage;
a third switch device, comprising:
a first control end for receiving the inversed clock signal of the second clock signal;
a second control for receiving the second clock signal;
a third control for receiving the inversed clock signal of the second clock signal;
a first input end coupled to an output end of the first shift register;
a second input end coupled to an output end of the third shift register;
a first output end coupled to a first input end of the second shift register for coupling the first input end of the third switch device to the first input end of the second shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the first input end of the second shift register for coupling the second input end of the third switch device to the first input end of the second shift register when the second clock signal is at the first predetermined voltage;
and
a fourth switch device, comprising:
a first control end for receiving the second clock signal;
a second control end for receiving the inversed clock signal of the second clock signal;
a third control end for receiving the second clock signal;
a first input end coupled to the output end of the first shift register;
a second input end coupled to the output end of the third shift register;
a first output end coupled to a second input end of the second shift register for coupling the first input end of the fourth switch device to the second end of the second shift register when the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the second input end of the second shift register for coupling the second input end of the fourth switch device to the second input end of the second shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage.

34 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/494,289Filed 30 Jun 2009
Priority: TW 09614352416 Nov 2007
Published: 22 Oct 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G11C 19/00
Digital stores in which the information is moved stepwise
G11C 19/18
Digital stores in which the information is moved stepwise, e.g. shift registers: using capacitors as main elements of the stages
G11C
Static stores

Family

Application12/061,649Division · filed 3 Apr 2008
Application12/494,289Division
US 2009/0129535 A1Published application
US 7,573,972 B2Related patent
US 7,756,238 B2Related patent
US 2009/0262884 A1This patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

a first switch device, comprising:
a first control end for receiving a second clock signal;
a second control end for receiving an inversed clock signal of the second clock signal;
a third control end for receiving the second clock signal;
a first input end for receiving a start signal;
a second input end coupled to an output end of the second shift register;
a first output end coupled to an input end of the first shift register for coupling the first input end of the first switch device to the first input end of the first shift register when the second clock signal is at a first predetermined voltage;
and
a second output end coupled to the input end of the first shift register for coupling the second input end of the first switch device to the first input end of the first shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
a second switch device, comprising:
a first control end for receiving the inversed clock signal of the second clock signal;
a second control end for receiving the second clock signal;
a third control end for receiving the inversed clock signal of the second clock signal;
a first input end for receiving the start signal;
a second input end coupled to an output end of the second shift register;
a first output end coupled to an second input end of the first shift register for coupling the first input end of the second switch device to the second input end of the first shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the second input end of the first shift register for coupling the second input end of the second switch device to the second input end of the first shift register when the second clock signal is at the first predetermined voltage;
a third switch device, comprising:
a first control end for receiving the inversed clock signal of the second clock signal;
a second control for receiving the second clock signal;
a third control for receiving the inversed clock signal of the second clock signal;
a first input end coupled to an output end of the first shift register;
a second input end coupled to an output end of the third shift register;
a first output end coupled to a first input end of the second shift register for coupling the first input end of the third switch device to the first input end of the second shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the first input end of the second shift register for coupling the second input end of the third switch device to the first input end of the second shift register when the second clock signal is at the first predetermined voltage;
and
a fourth switch device, comprising:
a first control end for receiving the second clock signal;
a second control end for receiving the inversed clock signal of the second clock signal;
a third control end for receiving the second clock signal;
a first input end coupled to the output end of the first shift register;
a second input end coupled to the output end of the third shift register;
a first output end coupled to a second input end of the second shift register for coupling the first input end of the fourth switch device to the second end of the second shift register when the second clock signal is at the first predetermined voltage;
and
a second output end coupled to the second input end of the second shift register for coupling the second input end of the fourth switch device to the second input end of the second shift register when the inversed clock signal of the second clock signal is at the first predetermined voltage.

34 more elements

Facts

Application

12/494,289Filed 30 Jun 2009

Priority

TW 09614352416 Nov 2007

Published

22 Oct 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

G11C 19/00
Digital stores in which the information is moved stepwise
G11C 19/18
Digital stores in which the information is moved stepwise, e.g. shift registers: using capacitors as main elements of the stages
G11C
Static stores