Display device and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9799267-B2
Application number	US-201715441965-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Jul 2, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Provided is an active matrix display device using an organic EL panel including: a plurality of pixel circuits each including an organic light emitting diode arranged in a pixel region of the organic EL panel and a plurality of transistors configured to drive the organic light emitting diode; a plurality of scanning lines arranged along a first direction in the organic EL panel; and a plurality of data lines arranged along a second direction that is orthogonal to the first direction. In at least one set of pixel circuits that are adjacent in the first direction, gate electrodes and impurity diffusion regions of the plurality of transistors have an axisymmetric layout. Gate electrodes of at least one set of transistors that are symmetrically arranged in the at least one set of pixel circuits are integrated.

First claim

What is claimed is:

1. A light emitting device, comprising:
a first data line;
a second data line;
a control line;
a first potential line and a second potential line that a first potential is applied to;
a first pixel circuit comprising:
a first light emitting element having a first anode;
a first transistor that supplies a first current to the first light emitting element in accordance with a first pixel signal from the first data line;
a second transistor connected between the first anode and the first potential line;

a second pixel circuit comprising:
a second light emitting element having a second anode;
a third transistor that supplies a second current to the second light emitting element in accordance with a second pixel signal from the second data line;
a fourth transistor connected between the second anode and the second potential line,

wherein the first data line and the second data line extend in a first direction,
wherein the second transistor and the fourth transistor have an integrated gate electrode connected to the control line at one connection point, and
wherein, in the first direction, the integrated gate electrode forms a mirror image about the connection point.

2. The display device according to claim 1 ,
wherein the second transistor and the fourth transistor are disposed in linear symmetry for the first direction.

3. The display device according to claim 1 , further comprising:
a shielding line arranged between the first data line and the second data line.

4. The display device according to claim 1 ,
wherein the first transistor and the third transistor are disposed in linear symmetry for the first direction.

5. The display device according to claim 1 ,
wherein the first data line, the second data line, the control line, the first pixel circuit, and the second pixel circuit are formed on a semiconductor substrate.

6. The display device according to claim 1 ,
wherein the first light emitting element and second light emitting element are organic light emitting diodes.

7. A light emitting device, comprising:
a first data line;
a second data line;
a control line;
a first pixel circuit comprising:
a first light emitting element having a first anode;
a first transistor that supplies a first current to the first light emitting element in accordance with a first pixel signal from the first data line and that has a first gate and a first drain;
a second transistor connected between the first gate and the first drain;

a second pixel circuit comprising:
a second light emitting element;
a third transistor that supplies a second current to the second light emitting element in accordance with a second pixel signal from the second data line and that has a second gate and a second drain;
a fourth transistor connected between the second gate and the second drain,

wherein the first data line and the second data line extend in a first direction,
wherein the second transistor and the fourth transistor have an integrated gate electrode connected to the control line at one connection point, and
wherein, in the first direction, the integrated gate electrode forms a mirror image about the connection point.

8. The display device according to claim 7 ,
wherein the second transistor and the fourth transistor are disposed in linear symmetry for the first direction.

9. The display device according to claim 7 , further comprising:
a shielding line arranged between the first data line and the second data line.

10. The display device according to claim 7 ,
wherein the first transistor and the third transistor are disposed in linear symmetry for the first direction.

11. The display device according to claim 7 ,
wherein the first data line, the second data line, the control line, the first pixel circuit, and the second pixel circuit are formed on a semiconductor substrate.

12. The display device according to claim 7 ,
wherein the first light emitting element and second light emitting element are organic light emitting diodes.

13. A light emitting device, comprising:
a first data line;
a second data line;
a scanning line;
a first pixel circuit comprising:
a first light emitting element having a first anode;
a first transistor that supplies a first current to the first light emitting element in accordance with a first pixel signal from the first data line and that has a first gate;
a second transistor connected between the first gate and the first data line;

a second pixel circuit comprising:
a second light emitting element;
a third transistor that supplies a second current to the second light emitting element in accordance with a second pixel signal from the second data line and that has a second gate;
a fourth transistor connected between the second gate and the second data line,

wherein the first data line and the second data line extend in a first direction,
wherein the second transistor and the fourth transistor have an integrated gate electrode connected to the scanning line at one connection point, and
wherein, in the first direction, the integrated gate electrode forms a mirror image about the connection point.

14. An electronic apparatus comprising the display device according to claim 1 .

15. An electronic apparatus comprising the display device according to claim 2 .

16. An electronic apparatus comprising the display device according to claim 4 .

17. An electronic apparatus comprising the display device according to claim 7 .

18. An electronic apparatus comprising the display device according to claim 8 .

19. An electronic apparatus comprising the display device according to claim 10 .

20. An electronic apparatus comprising the display device according to claim 13 .

Assignees

• Seiko Epson Corp

Inventors

• Nomura Takeshi

Classifications

• G09G2320/0209

  Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2300/0861

  with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes · CPC title

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title