Electro-optical device and electronic apparatus

Patent metadata

Field	Value
Publication number	US-11929036-B2
Application number	US-202318126638-A
Country	US
Kind code	B2
Filing date	Mar 27, 2023
Priority date	Mar 28, 2022
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

An electro-optical device includes: a data signal output circuit including a D/A converter circuit; a plurality of terminals; a control circuit supplied with a power supply potential VL from at least one terminal of the plurality of terminals via a first power supply wiring line; and a power supply circuit configured to generate a power supply potential VPL in accordance with potentials AVDD and AVSS supplied via two or more terminals of the plurality of terminals and supply the power supply potential VPL to a second power supply wiring line. The D/A converter circuit includes a plurality of capacitance elements. The first power supply wiring line or the second power supply wiring line is selectively coupled to one portion of the plurality of capacitance elements.

First claim

What is claimed is:

1. An electro-optical device comprising:
a driving circuit including a D/A converter circuit;
a plurality of terminals;
a first circuit supplied with a first power supply potential from at least one terminal of the plurality of terminals via a first power supply wiring line; and
a power supply circuit configured to generate a second power supply potential different from the first power supply potential in accordance with potentials supplied via two or more terminals of the plurality of terminals and supply the second power supply potential to a second power supply wiring line, wherein
the D/A converter circuit includes a plurality of capacitance elements and
the first power supply wiring line or the second power supply wiring line is selectively coupled to one portion of the plurality of capacitance elements.

2. The electro-optical device according to claim 1 , wherein
the first circuit is a logic circuit configured to supply a control signal to the driving circuit and
the first power supply potential corresponds to a high level in the logic circuit.

3. The electro-optical device according to claim 2 , wherein
the power supply circuit:
generates the first power supply potential and supplies the first power supply potential to the first power supply wiring line and
generates a third power supply potential different from the first power supply potential and the second power supply potential and supplies the third power supply potential to a third power supply wiring line and

the first power supply wiring line or the third power supply wiring line is selectively coupled to the other portion of the plurality of capacitance elements other than the one portion of the plurality of capacitance elements.

4. The electro-optical device according to claim 3 , wherein
the D/A converter circuit includes a lower D/A converter circuit unit and an upper D/A converter circuit unit,
a capacitance element included in the lower D/A converter circuit unit is the one portion of the plurality of capacitance elements, and
a capacitance element included in the upper D/A converter circuit unit is the other portion of the plurality of capacitance elements other than the one portion of the plurality of capacitance elements.

5. The electro-optical device according to claim 1 , wherein
the power supply circuit generates a third power supply potential different from the first power supply potential and the second power supply potential and supplies the third power supply potential to a third power supply wiring line and
the first power supply wiring line or the third power supply wiring line is selectively coupled to the other portion of the plurality of capacitance elements other than the one portion of the plurality of capacitance elements.

6. The electro-optical device according to claim 5 , wherein
the D/A converter circuit includes a lower D/A converter circuit unit and an upper D/A converter circuit unit,
a capacitance element included in the lower D/A converter circuit unit is the one portion of the plurality of capacitance elements, and
a capacitance element included in the upper D/A converter circuit unit is the other portion of the plurality of capacitance elements other than the one portion of the plurality of capacitance elements.

7. The electro-optical device according to claim 5 , further comprising
a logic circuit configured to supply a control signal to the driving circuit, wherein
a power supply wiring line through which power is supplied to the logic circuit is electrically spaced apart from the first power supply wiring line, the second power supply wiring line, and the third power supply wiring line.

8. The electro-optical device according to claim 1 , further comprising
a pixel circuit including a light-emitting element, wherein
in the pixel circuit, a current corresponding to a voltage output from the D/A converter circuit is supplied to the light-emitting element.

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

Assignees

• Seiko Epson Corp

Inventors

• Ota Hitoshi

Classifications

• G09G3/3275 Primary

  Details of drivers for data electrodes · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G2310/027

  Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters · CPC title

• G09G3/3233 Primary

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

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title