ELECTRONIC CIRCUIT, ELECTRONIC DEVICE, METHOD OF DRIVING ELECTRONIC DEVICE, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC APPARATUS

• US 20070018078A1
• Filed: 07/10/2006
• Published: 01/25/2007
• Est. Priority Date: 07/21/2005
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: MIYAZAWA, Takashi
• Granted Patent: US 7,639,211 B2
• Time in Patent Office: Days
• US Class Current: 250/214.100
• CPC Class Codes: H03F 2200/303 the loading circuit of an amplifying stage comprising a diode or diode coupled transistor
• CPC Class Codes: H03F 3/08 controlled by light

Abstract

An electronic device includes a plurality of first wiring lines, a plurality of second wiring lines that intersect the plurality of first wiring lines, a plurality of unit circuits that are disposed so as to correspond to intersections between the plurality of first wiring lines and the plurality of second wiring lines, and a plurality of reference signal lines that supply reference signals to the plurality of unit circuits. Each of the plurality of unit circuits has a driven element that is driven by a driving voltage or a driving current, a driving unit that supplies the driving voltage or the driving current to the driven element, a switching element that controls electrical connection between an input terminal provided in the driving unit and one of the plurality of second wiring lines, and a capacitor element that has a first electrode connected to the input terminal and a second electrode connected to one of the plurality of reference signal lines, and accumulates a charge between the first electrode and the second electrode.

Claims

1. An electronic device comprising:

a plurality of first wiring lines;

a plurality of second wiring lines that intersects the plurality of first wiring lines;

a plurality of unit circuits; and

a plurality of reference signal lines that supply reference signals to the plurality of unit circuits,

each of the plurality of unit circuits having;

a driven element that is driven by a driving voltage or a driving current;

a driving unit that supplies the driving voltage or the driving current to the driven element;

a switching element that controls electrical connection between an input terminal provided in the driving unit and one second wiring line of the plurality of second wiring lines; and

a capacitor element that has a first electrode coupled to the input terminal and a second electrode coupled to one reference signal line of the plurality of reference signal lines and that accumulates a charge between the first electrode and the second electrode.

2. The electronic device according to claim 1,

the plurality of reference signal lines intersecting the plurality of second wiring lines.

3. The electronic device according to claim 1,

a potential of each of the plurality of reference signal lines varying with a predetermined cycle.

4. The electronic device according to claim 3, further comprising:

a selection circuit that selects each of the plurality of first wiring lines; and

a signal generating circuit that sequentially supplies the reference signals to the plurality of reference signal lines in the order in which the first wiring lines are selected.

5. The electronic device according to claim 1,

in a first period, a data signal being supplied to the input terminal through the one second wiring line and the switching element such that a potential of the input terminal is set.

6. The electronic device according to claim 5,

a time length of a driving period in which the driving voltage or the driving current is supplied to the driven element corresponding to the potential of the input terminal set in the first period.

7. The electronic device according to claim 5,

the potential of the input terminal varying from the potential set by the data signal in the first period according to a variation in a potential of the one reference signal line.

8. The electronic device according to claim 7,

the input terminal being in a floating state in at least a portion of the driving period in which the driving voltage or the driving current is supplied to the driven element.

9. The electronic device according to claim 5,

the driving unit supplying the driving voltage or the driving current to the driven element in one of a period in which the potential of the input terminal set by the data signal in the first period is greater than a predetermined potential and a period in which the potential of the input terminal is smaller than the predetermined potential.

10. The electronic device according to claim 9,

the potential of the one reference signal line being set to a first potential when the potential of the input terminal is set by the data signal in the first period,

the potential of the one reference signal line when a second period starts being the first potential,

the potential of the one reference signal line becoming a second potential that has a voltage level different from the first potential, in the second period, and

the potential of the one reference signal line when the second period is completed being the first potential.

11. The electronic device according to claim 10,

the variation in the potential of the one reference signal line in the second period being axisymmetric on the basis of a time point when the potential of the one reference signal line becomes the second potential.

12. The electronic device according to claim 1,

each of the plurality of unit circuits further including a reset unit that sets the potential of the input terminal to a predetermined potential before the first period in which the data signal is supplied to the input terminal through the one second wiring line and the switching element.

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

13. An electro-optical device comprising:

a plurality of scanning-lines;

a plurality of data lines that intersect the plurality of scanning lines;

a plurality of unit circuits; and

a plurality of reference signal lines that supply reference signals to the plurality of unit circuits,

each of the plurality of unit circuits having an electro-optical element that is driven by a driving voltage or a driving current, a driving unit that supplies the driving voltage or the driving current to the electro-optical element, a switching element that controls electrical connection between an input terminal included in the driving unit and one data line of the plurality of data lines, and a capacitor element that as a first electrode coupled to the input terminal and a second electrode coupled to one reference signal line of the plurality of reference signal lines and that accumulates a charge between the first electrode and the second electrode, and

a time length of a driving period in which the driving voltage or the driving current is supplied to the electro-optical element is set by supplying a data signal to the input terminal through the one data line and the switching element in the first period.