Display device and electoric device having the same

Abstract

It is an object of the present invention to provide a display device where power consumption can be suppressed and the number of gray scales can be increased without a scanning line driver circuit on both sides of a pixel portion. In a display device having a scanning line driver circuit, a shift register included in the scanning line driver circuit has 4m-stage (m is a natural number) flip-flop circuits in every m scanning lines, and a signal which selects the scanning line in a first half period of one scanning line selection period and a signal which selects the scanning line in a second half period of the one scanning line selection period are output to the scanning line by another start pulse.

Description

BRIEF DESCRIPTION OF DRAWINGS

In the accompanying drawings:

FIGS. 1A and 1B are diagrams each showing a scanning line driver circuit of the present invention;

FIG. 2 is a timing chart diagram of a scanning line driver circuit of the present invention;

FIGS. 3A and 3B are a diagram and a view each showing Embodiment 1 of the present invention;

FIG. 4 is a diagram showing Embodiment 1 of the present invention;

FIG. 5 is a diagram showing Embodiment 1 of the present invention;

FIGS. 6A and 6B are diagrams each showing Embodiment 2 of the present invention;

FIGS. 7A and 7B are diagrams each showing Embodiment 3 of the present invention;

FIG. 8 is a diagram showing Embodiment 3 of the present invention;

FIGS. 9A and 9B are diagrams each showing Embodiment 4 of the present invention;

FIGS. 10A and 10B are views each showing Embodiment 5 of the present invention;

FIGS. 11A to 11C are views each showing Embodiment 6 of the present invention;

FIGS. 12A to 12C are views each showing Embodiment 7 of the present invention;

FIG. 13 is a view showing Embodiment 8 of the present invention;

FIG. 14 is a diagram showing Embodiment 9 of the present invention;

FIGS. 15A to 15C are views each showing Embodiment 10 of the present invention;

FIGS. 16A and 16B are diagrams each showing a conventional pixel structure;

FIG. 17 is a diagram showing a conventional display device including a scanning line driver circuit; and

FIGS. 18A and 18B are diagrams each showing a scanning line driver circuit of the present invention.

Claims

1. A display device comprising: a scanning line driver circuit; anda plurality of scanning lines electrically connected to the scanning line driver circuit,wherein 4k-stage (k is a natural number) flip-flop circuits corresponding to each of the plurality of scanning lines are provided in a shift register included in the scanning line driver circuit.

2. A display device according to claim 1, wherein selection signals is output from any one of the 4k-stage flip-flop circuits.

3. A display device according to claim 1, wherein a start pulse is input from a side of a flip-flop circuit corresponding to first scanning line.

4. A display device according to claim 1, wherein, in a preceding stage of a flip-flop circuit corresponding to first scanning line to which a start pulse is input, in the scanning line driver circuit, at least one flip-flop circuit is further provided.

5. An electronic device having the display device according to claim 1.

6. A display device comprising: a scanning line driver circuit; andm (m is a natural number of greater than or equal to 2) scanning lines electrically connected to the scanning line driver circuit,wherein 4k-stage (k is a natural number) flip-flop circuits corresponding to each of first to (m−1)-th scanning lines are provided, and at least one-stage flip-flop circuit corresponding to m-th scanning line is provided, in a shift register included in the scanning line driver circuit.

7. A display device according to claim 6, wherein selection signals is output from any one of the 4k-stage flip-flop circuits.

8. A display device according to claim 6, wherein a start pulse is input from a side of a flip-flop circuit corresponding to first scanning line.

9. A display device according to claim 6, wherein, in a preceding stage of a flip-flop circuit corresponding to first scanning line to which a start pulse is input, in the scanning line driver circuit, at least one flip-flop circuit is further provided.

10. An electronic device having the display device according to claim 6.

11. A display device comprising: a plurality of pixels:a signal line driver circuit electrically connected to the plurality of pixels;a scanning line driver circuit electrically connected to the plurality of pixels; anda plurality of scanning lines electrically connected to the scanning line driver circuit,wherein 4k-stage (k is a natural number) flip-flop circuits corresponding to each of the plurality of scanning lines are provided in a shift register included in the scanning line driver circuit.

12. A display device according to claim 11, wherein selection signals is output from any one of the 4k-stage flip-flop circuits.

13. A display device according to claim 11, wherein a start pulse is input from a side of a flip-flop circuit corresponding to first scanning line.

14. A display device according to claim 11, wherein, in a preceding stage of a flip-flop circuit corresponding to first scanning line to which a start pulse is input, in the scanning line driver circuit, at least one flip-flop circuit is further provided.

15. A display device according to claim 11, wherein the plurality of pixels, the signal line driver circuit, and the scanning line driver circuit are provided on a same substrate.

16. A display device according to claim 11, wherein the plurality of pixels are each provided with a light-emitting element, a transistor for driving the light-emitting element, and a transistor for selecting the pixel.

17. An electronic device having the display device according to claim 11.

18. A display device comprising: a plurality of pixels:a signal line driver circuit electrically connected to the plurality of pixels;a scanning line driver circuit electrically connected to the plurality of pixels; andm (m is a natural number of greater than or equal to 2) scanning lines electrically connected to the scanning line driver circuit,wherein 4k-stage (k is a natural number) flip-flop circuits corresponding to each of first to (m−1)-th scanning lines are provided, and at least one-stage flip-flop circuit corresponding to m-th scanning line is provided, in a shift register included in the scanning line driver circuit.

19. A display device according to claim 18, wherein selection signals is output from any one of the 4k-stage flip-flop circuits.

20. A display device according to claim 18, wherein a start pulse is input from the side of a flip-flop circuit corresponding to first scanning line.

21. A display device according to claim 18, wherein, in a preceding stage of a flip-flop circuit corresponding to first scanning line to which a start pulse is input, in the scanning line driver circuit, at least one flip-flop circuit is further provided.

22. A display device according to claim 18, wherein the plurality of pixels, the signal line driver circuit, and the scanning line driver circuit are provided over a same substrate.

23. A display device according to claim 18, wherein the plurality of pixels are each provided with a light-emitting element, a transistor for driving the light-emitting element, and a transistor for selecting the pixel.

24. An electronic device having the display device according to claim 18.