Display device and electronic apparatus

1. A display device comprising:

scanning circuits;

a video signal output circuit;

a current supply unit;

M current supply lines which are connected to the current supply unit and extend in a first direction;

M scanning lines which are connected to the scanning circuits and extend in the first direction;

N data lines which are connected to the video signal output circuit and extend in a second direction; and

N×M light-emitting elements in total of N light-emitting elements in the first direction and M light-emitting elements in the second direction different from the first direction arranged in a two-dimensional matrix, each light-emitting element having a light-emitting unit and a driving circuit for driving the light-emitting unit, wherein

the driving circuit of each light-emitting element is connected to the corresponding current supply line, the corresponding scanning line, and the corresponding data line,

a capacitive load unit is provided between each scanning line and each scanning circuit, and

the capacitance of the capacitive load unit is 5 times to 200 times greater than the parasitic capacitance of the corresponding scanning line per light-emitting element.

2. The display device according to claim 1 ,

wherein a second capacitive load unit is further provided in the termination portion of each data line.

3. The display device according to claim 1 ,

wherein, when, from each scanning circuit through the capacitive load unit and the corresponding scanning line, the pulse width of a scanning signal which is input to a light-emitting element in the central portion along the first direction and the central portion along the second direction is PW 1-C , and the pulse width of a scanning signal which is input to a light-emitting element adjacent to each scanning circuit in the central portion along the second direction is PW 1-E , the following condition is satisfied

0.95≦ PW 1-E /PW 1-C <1.

4. The display device according to claim 1 ,

wherein the capacitive load unit has a transistor, and

the capacitance of the capacitive load unit is constituted by the gate capacitance of the transistor.

5. The display device according to claim 1 , wherein

the capacitive load unit has two electrodes and a dielectric layer interposed between the two electrodes, and

one electrode is constituted by the corresponding scanning line.

6. The display device according to claim 1 ,

wherein the capacitance of the capacitive load unit is determined by the luminance difference between luminance of a light-emitting element in the central portion along the first direction and the central portion along the second direction and luminance of a light-emitting element adjacent to each scanning circuit in the central portion along the second direction, a desired value of the luminance difference, and the parasitic capacitance of the corresponding scanning line per light-emitting element.

7. The display device according to claim 1 , wherein

the driving circuit at least includes:

a drive transistor having source/drain regions, a channel forming region, and a gate electrode,

a video signal write transistor having source/drain regions, a channel forming region, and a gate electrode, and

a capacitive unit,

in the drive transistor:

one region of the source/drain regions is connected to the corresponding current supply line,

the other of the source/drain regions is connected to the light-emitting unit and connected to one end of the capacitive unit, and forms a second node, and

the gate electrode is connected to the other of the source/drain regions of the video signal write transistor and connected to the other end of the capacitive unit, and forms a first node, and

in the video signal write transistor:

one region of the source/drain regions is connected to the corresponding data line, and

the gate electrode is connected to the corresponding scanning line.

8. An electronic apparatus comprising:

the display device according to claim 1 .

9. A display device comprising:

scanning circuits;

a video signal output circuit;

a current supply unit;

M current supply lines which are connected to the current supply unit and extend in a first direction;

M scanning lines which are connected to the scanning circuits and extend in the first direction;

N data lines which are connected to the video signal output circuit and extend in a second direction; and

N×M light-emitting elements in total of N light-emitting elements in the first direction and M light-emitting elements in the second direction different from the first direction arranged in a two-dimensional matrix, each light-emitting element having a light-emitting unit and a driving circuit for driving the light-emitting unit, wherein

the driving circuit of each light-emitting element is connected to the corresponding current supply line, the corresponding scanning line, and the corresponding data line,

a capacitive load unit is provided in the termination portion of each data line, and

the capacitance of the capacitive load unit is 5 times to 10 times greater than parasitic capacitance between the corresponding scanning line and data line per light.

10. The display device according to claim 9 ,

wherein, when, from each scanning circuit through the corresponding scanning line, the pulse width of a scanning signal which is input to a light-emitting element adjacent to each scanning circuit in the termination portion of the corresponding data line is PW 2-E , and the pulse width of a scanning signal which is input to a light-emitting element adjacent to each scanning circuit in the central portion of the corresponding data line is PW 2-C , the following condition is satisfied

0.95≦ PW 2-E /PW 2-C <1.

11. The display device according to claim 9 ,

wherein the capacitive load unit has a transistor, and

the capacitance of the capacitive load unit is constituted by the gate capacitance of the transistor.

12. The display device according to claim 9 ,

wherein the capacitive load unit has two electrodes and a dielectric layer interposed between the two electrodes, and

one electrode is constituted by the corresponding data line.

13. The display device according to claim 9 ,

wherein the capacitance of the capacitive load unit is determined by the luminance difference between luminance of a light-emitting element adjacent to each scanning circuit in the central portion of the corresponding data line and luminance of a light-emitting element adjacent to each scanning circuit in the termination portion of the corresponding data line, a desired value of the luminance difference, and parasitic capacitance between the scanning line and the data line in one light-emitting element in the termination portion.

14. The display device according to claim 9 , wherein

the driving circuit at least includes:

a drive transistor having source/drain regions, a channel forming region, and a gate electrode,

a video signal write transistor having source/drain regions, a channel forming region, and a gate electrode, and

a capacitive unit,

in the drive transistor:

one region of the source/drain regions is connected to the corresponding current supply line,

the other of the source/drain regions is connected to the light-emitting unit and connected to one end of the capacitive unit, and forms a second node, and

the gate electrode is connected to the other of the source/drain regions of the video signal write transistor and connected to the other end of the capacitive unit, and forms a first node, and

in the video signal write transistor:

one region of the source/drain regions is connected to the corresponding data line, and

the gate electrode is connected to the corresponding scanning line.

15. An electronic apparatus comprising:

the display device according to claim 9 .