# US 2017/0287941 A1 · Electro-optical device and electronic apparatus

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- Number: US 2017/0287941 A1
- Document ID: US20170287941A1
- Status: Published application
- Kind: A1
- Application number: 15/629,452
- Filed: 2017-06-21
- Published: 2017-10-05
- Earliest claimed: 2012-04-03
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Takashi TOYA; Takehiko KUBOTA
- Web page: https://patentgrep.com/patent/US20170287941A1

## CPC

- G09G 3/3241: the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
- G06K 19/07758: {arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag}
- G06Q 10/30: Administration of product recycling or disposal
- G06Q 30/015: Providing customer assistance, e.g. assisting a customer within a business location or via helpdesk
- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- H10D 86/441: {Interconnections, e.g. scanning lines}
- H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/1213: {the pixel elements being TFTs}
- H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT]
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 2300/0408: Integration of the drivers onto the display substrate
- G09G 2300/0439: Pixel structures
- G09G 2300/0465: Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit
- G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.

## Claims

### Claim 1

An electro-optical device comprising:
a scanning line;
a data line;
a first transistor having a first gate electrode;
a second transistor having a second gate electrode, the second gate electrode being electrically connected to the scanning line;
an electrode;
a first storage capacitor that stores a charge that depends on a data signal that is supplied through the data line and the second transistor, the first storage capacitor being formed by the first gate electrode and the electrode sandwiching a first interlayer insulating layer; and
a light-emitting element that emits light at a brightness that depends on a current that is supplied through the first transistor.

### Claim 2 (depends on 1)

The electro-optical device according to claim 1, further comprising a second interlayer insulating layer,
wherein the electrode is formed between the first interlayer insulating layer and the second interlayer insulating layer.

### Claim 3 (depends on 2)

The electro-optical device according to claim 2,
wherein the scanning line is formed between the first interlayer insulating layer and the second interlayer insulating layer.

### Claim 4 (depends on 2)

The electro-optical device according to claim 2, further comprising a feed line,
wherein the first transistor is electrically connected between the light emitting element and the feed line, and
the electrode is electrically connected to the feed line.

### Claim 5 (depends on 4)

The electro-optical device according to claim 4, further comprising:
a contact hole formed in the second interlayer insulating layer,
wherein the electrode is electrically connected to the feed line through the contact hole.

### Claim 6 (depends on 1)

The electro-optical device according to claim 1,
wherein the scanning line overlaps the first gate electrode when viewed from a direction that is perpendicular to a surface of a substrate on which the first transistor and the second transistor are formed.

### Claim 7 (depends on 2)

The electro-optical device according to claim 2, further comprising:
a third transistor having a third gate electrode and being electrically connected between a drain of the first transistor and the first gate electrode; and
a first control line that is electrically connected to the third gate electrode,
wherein the first control line is formed between the first interlayer insulating layer and the second interlayer insulating layer.

### Claim 8 (depends on 7)

The electro-optical device according to claim 7,
wherein the first control line overlaps the first gate electrode when viewed from a direction that is perpendicular to a surface of a substrate on which the first transistor and the second transistor are formed.

### Claim 9 (depends on 1)

The electro-optical device according to claim 1, further comprising:
a fourth transistor having a fourth gate electrode and being electrically connected between a drain of the first transistor and the light-emitting element; and
a second control line being electrically connected to the fourth gate electrode,
wherein the second control line is formed between the first interlayer insulating layer and the second interlayer insulating layer.

### Claim 10 (depends on 9)

The electro-optical device according to claim 9,
wherein the second control line overlaps the first gate electrode when viewed from a direction that is perpendicular to a surface of a substrate on which the first transistor and the second transistor are formed.

### Claim 11 (depends on 1)

An electronic apparatus comprising the electro-optical device according to claim 1.

### Claim 12 (depends on 2)

An electronic apparatus comprising the electro-optical device according to claim 2.

### Claim 13 (depends on 3)

An electronic apparatus comprising the electro-optical device according to claim 3.

### Claim 14 (depends on 4)

An electronic apparatus comprising the electro-optical device according to claim 4.

### Claim 15 (depends on 5)

An electronic apparatus comprising the electro-optical device according to claim 5.

### Claim 16 (depends on 6)

An electronic apparatus comprising the electro-optical device according to claim 6.

### Claim 17 (depends on 7)

An electronic apparatus comprising the electro-optical device according to claim 7.

### Claim 18 (depends on 8)

An electronic apparatus comprising the electro-optical device according to claim 8.

### Claim 19 (depends on 9)

An electronic apparatus comprising the electro-optical device according to claim 9.

### Claim 20 (depends on 10)

An electronic apparatus comprising the electro-optical device according to claim 10.