ACTIVE MATRIX SUBSTRATE, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC DEVICE

• US 20140027793A1
• Filed: 07/25/2013
• Published: 01/30/2014
• Est. Priority Date: 11/21/2001
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: MATSUEDA, Yojiro
• Application Number:
  US13/950,723
• Publication Number:
  US 20140027793A1
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G09G 2300/0417 Special arrangements specific to the use of low carrier mobility technology
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: 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
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 2320/0214 with crosstalk due to leakage current of pixel switch in active matrix panels
• CPC Class Codes: G09G 3/325 the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
• 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: H01L 29/78609 for preventing leakage current H01L29/78618 takes precedence
• CPC Class Codes: H01L 29/78621 with LDD structure or an extension or an offset region or characterised by the doping profile
• CPC Class Codes: H01L 29/78645 with multiple gate
• CPC Class Codes: H01L 33/08 with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body H01L27/15 takes precedence
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An active matrix substrate is provided which does not cause reductions in the brightness of electroluminescence elements, and which comprises appropriate peripheral circuitry occupying a small area. The active matrix substrate comprises peripheral circuits to supply current to EL elements provided for each pixel, and corresponding to EL elements, and further comprises a holding element which holds a control voltage, a first active element connected to the holding element and which supplies current to a light-emitting portion based on a control voltage, and a second active element connected to the holding element and which controls the charging and discharging of the holding element. In particular, the second active element is configured as a multiple-control-terminal type active element. As a result, there are no fluctuations in the programmed current.

Claims

1. An electro-optical device comprising:

an electro-optical element;

a first transistor that has a source and a drain; and

a power supply line that is electrically connected to the electro-optical element and extends in a direction,

the power supply line being electrically connected to the source or the drain of the first transistor through a plurality of first contact holes,

the plurality of first contact holes being arranged along a line extending in the direction.

3. The electro-optical device according to claim 1, further comprising a second transistor having a gate electrode, the gate electrode of the second transistor being electrically connected to the source or the drain of the first transistor through a plurality of second contact holes.

5. The electro-optical device according to claim 1, further comprising a data line extending in the direction.

7. An electronic device, comprising:

the electro-optical device as set forth in claim 1.

2. An electro-optical device comprising:

an electro-optical element;

a first transistor that has a source and a drain;

a second transistor that has a gate electrode; and

a power supply line that is electrically connected to the electro-optical element and extends in a direction,

the gate electrode of the second transistor being electrically connected to the source or the drain of the first transistor through a plurality of second contact holes,

the plurality of second contact holes arranged along a line extending in the direction.

4. The electro-optical device according to claim 2,

the power supply line being electrically connected to the source or the drain of the first transistor through a plurality of first contact holes.

6. The electro-optical device according to claim 2, further comprising a data line extending in the direction.