US 2011/0084960 A1 · SHIFT REGISTER AND DISPLAY DEVICE

Abstract

The shift register includes first to fourth flip-flops. A first clock signal which is in a first voltage state in a first period and in a second voltage state in second to fourth periods is input to the first flip-flop. A second clock signal which is in the first voltage state in the second period and in the second voltage state in the third period and the fourth period is input to the second flip-flop. A third clock signal which is in the second voltage state in the first, second, and fourth periods and in the first voltage state in the third period is input to the third flip-flop. A fourth clock signal which is in the second voltage state in the first and second periods and in the first voltage state in the fourth period is input to the fourth flip-flop.

Claims6

Dependent claims

A shift register comprising:

a first flip-flop to which a first clock signal which is in a first voltage state in a first period and in a second voltage state in second to fourth periods is input;
a second flip-flop to which a second clock signal which is in the first voltage state in at least part of the second period and in the second voltage state in at least part of the third period, and the fourth period is input;
a third flip-flop to which a third clock signal which is in the second voltage state in the first, second, and fourth periods and in the first voltage state in the third period is input;
and
a fourth flip-flop to which a fourth clock signal which is in the second voltage state in at least part of the first period, and the second period and in the first voltage state in at least part of the fourth period is input.

2 more elements

Dependencies are inferred from the claim text.

Shift register and display device

Life of this patent

Shift register and display device

Life of this patent

Abstract

Claims6