LIGHT EMITTING DEVICE AND ELECTRONIC APPARATUS

• US 20140217432A1
• Filed: 01/29/2014
• Published: 08/07/2014
• Est. Priority Date: 02/07/2013
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: OTA, Hitoshi, NOZAWA, Ryoichi, NOMURA, Takeshi
• Granted Patent: US 9,653,489 B2
• Time in Patent Office: Days
• US Class Current: 257/89
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/30 Devices specially adapted for multicolour light emission

Abstract

There is provided a light emitting device including: a semiconductor substrate; a plurality of pixel circuits that is disposed in a display region of the semiconductor substrate; a first wiring that is formed of a conductive material so as to be supplied with a predetermined electric potential; and a plurality of first contact portions that is formed of a conductive material so as to connect the semiconductor substrate and the first wiring. The plurality of first contact portions and the first wiring are provided in the display region.

Claims

1. A light emitting device comprising:

a semiconductor substrate;

a plurality of pixel circuits that is disposed in a display region of the semiconductor substrate;

a first wiring that is formed of a conductive material so as to be supplied with a predetermined electric potential; and

a plurality of first contact portions that is formed of a conductive material so as to connect the semiconductor substrate and the first wiring,

wherein the plurality of first contact portions and the first wiring are provided in the display region.

2. The light emitting device according to claim 1,

wherein the plurality of pixel circuits include a first pixel circuit and a second pixel circuit,

wherein each of the first pixel circuit and the second pixel circuit includes

a first light emitting element, and

a first transistor that supplies current to the first light emitting element, and

wherein a source of the first transistor is connected to one of the plurality of first contact portions.

3. The light emitting device according to claim 2,

wherein the light emitting device is able to display at least a first color and a second color,

wherein the plurality of pixel circuits includes a first block corresponding the first color and a second block corresponding the second color,

wherein the each of the first display block and the second display block includes at least two pixel circuit,

wherein the first display block includes the first pixel circuit, and

wherein the second display block includes the second pixel circuit.

4. The light emitting device according to claim 2,

wherein one of the plurality of first contact portions includes a part of a source electrode of the first transistor.

5. The light emitting device according to claim 1,

wherein the display region includes a first unitary display region and a second unitary display region,

wherein an area of the first unitary display region is equal to an area of the second unitary display region, and

wherein the plurality of first contact portions includes a contact portion formed in the first unitary display region and a contact portion formed in the second unitary display region.

6. The light emitting device according to claim 5,

wherein the light emitting device is able to display at least a first color and a second color,

wherein the plurality of pixel circuits includes a first block corresponding the first color and a second block corresponding the second color,

wherein the each of the first display block and the second display block includes at least two pixel circuit, and

wherein the first display block is disposed in the first unitary display region.

7. The light emitting device according to claim 1,

wherein the semiconductor substrate includes a first impurity diffused region in the display region, and

wherein the plurality of first contact portions is connected to the first impurity diffused region.

8. The light emitting device according to claim 1,

wherein the plurality of pixel circuits is disposed in a matrix, and

wherein the plurality of first contact portions is disposed in a matrix with a proportion of one row of first contact portions to two rows of the pixel circuits or with a proportion of one column of first contact portions to two columns of the pixel circuits.

9. The light emitting device according to claim 1,

wherein the plurality of pixel circuits is disposed in a matrix,

wherein the plurality of pixel circuits includes a plurality of sets of two pixel circuits formed of

a second pixel circuit which has a second light emitting element and a second transistor, and

a third pixel circuit which has a third light emitting element and a third transistor and is next to the second pixel circuit in a row direction or a column direction, and

wherein a source electrode of the second transistor and a source electrode of the third transistor are connected to one of the plurality of first contact portions.

10. The light emitting device according to claim 1, further comprising:

a second wiring that is formed of a conductive material so as to be supplied with the predetermined electric potential; and

a plurality of second contact portions that is formed of a conductive material so as to connect the semiconductor substrate and the second wiring,

wherein the plurality of second contact portions and the second wiring are provided in an arrangement region, and

wherein the arrangement region is a part or the entirety of a peripheral region surrounding the display region.

11. The light emitting device according to claim 10,

wherein the second wiring includes a plurality of conductive wiring layers.

12. The light emitting device according to claim 10,

wherein the semiconductor substrate includes a second impurity diffused region in the arrangement region, and

wherein the plurality of second contact portions is connected to the second impurity diffused region.

13. An electronic apparatus comprising the light emitting device according to claim 1.

14. An electronic apparatus comprising the light emitting device according to claim 2.

15. An electronic apparatus comprising the light emitting device according to claim 3.

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

17. An electronic apparatus comprising the light emitting device according to claim 5.

18. An electronic apparatus comprising the light emitting device according to claim 6.

19. An electronic apparatus comprising the light emitting device according to claim 7.

20. An electronic apparatus comprising the light emitting device according to claim 8.