# US 10,769,996 B2 · Electro-optical device, electronic apparatus, and method of driving electro-optical device

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- Number: US 10,769,996 B2
- Document ID: US10769996B2
- Status: Granted
- Kind: B2
- Application number: 16/391,417
- Filed: 2019-04-23
- Published: 2019-08-15
- Granted: 2020-09-08
- Earliest claimed: 2014-08-06
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Hitoshi Ota; Takeshi Koshihara
- Web page: https://patentgrep.com/patent/US10769996B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/003: {to produce spatial visual effects}
- 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
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- 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 2310/0251: Precharge or discharge of pixel before applying new pixel voltage
- G09G 2320/043: Preventing or counteracting the effects of ageing
- G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements
- 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)

## Abstract

An electro-optical device includes a first data transfer line that intersects a scan line, a second data transfer line, a first transistor that controls coupling between the first data transfer line and the second transfer line. The two or more second data transfer lines are respectively coupled to the first data transfer line via first capacitors, and when a collection of pixel circuits that are coupled to the same first data transfer line via the second data transfer lines is referred to as a pixel string, the second data transfer lines are provided to pixel circuits less than the pixel circuits included in the pixel string.

## Claims

### Claim 1

An electro-optical device comprising:
a plurality of groups pixel circuits;
a first data transfer line;
a plurality of data transfer lines comprising: a second data transfer line that is coupled to at least one of the plurality of groups of pixel circuits; and a third data transfer line that is coupled to at least one of the remaining of the plurality of groups of pixel circuits;
a first capacitor that includes a first electrode which is coupled to the first data transfer line and a second electrode which is coupled to the second data transfer line; and
a second capacitor that includes a third electrode which is coupled to the first data transfer line and a fourth electrode which is coupled to the third data transfer line,
wherein each pixel circuit includes:
a drive transistor that has a gate electrode, a first current terminal, and a second current terminal;
a compensation transistor that electrically couples between the first current terminal of the drive transistor and the gate electrode of the drive transistor;
a data transfer line driver circuit that switches potentials of the first data transfer line and the first electrode, in such a manner that potential change amounts of the first data transfer line and the first electrode becomes a value according to a gradation level; and
a light emitting element that emits light in brightness according to a magnitude of a current which is supplied based on a potential that is shifted in accordance with the potential change amounts from a potential according to the electrical characteristics of the drive transistor,
wherein the second data transfer line and the third data transfer line are shorter than the first data transfer line.

### Claim 2 (depends on 1)

The electro-optical device according to claim 1, further comprising:
a first transmission gate of which an output terminal is connected to the first data transfer line;
a second transmission gate of which an output terminal is connected to the output terminal of the first transmission gate; and
a third capacitor of which one electrode is electrically coupled to an input terminal of the second transmission gate.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 2)

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