Semiconductor device and display device having semiconductor device

Patent metadata

Field	Value
Publication number	US-2016349904-A1
Application number	US-201615159020-A
Country	US
Kind code	A1
Filing date	May 19, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A semiconductor device including a transistor includes a pixel circuit, a monitor circuit, and a correction circuit. The pixel circuit includes a selection transistor, a driving transistor, and a light-emitting element. The monitor circuit includes a monitor light-emitting element and a monitor transistor. The semiconductor device obtains the value of current flowing to the monitor light-emitting element and the monitor transistor and controls the value of current flowing to the light-emitting element and the driving transistor by the correction circuit.

First claim

What is claimed is:

1 . A semiconductor device including a transistor, comprising:
a pixel circuit comprising:
a selection transistor;
a driving transistor; and
a light-emitting element;
a monitor circuit comprising:
a monitor light-emitting element; and
a monitor transistor;
a correction circuit comprising;
an amplifier circuit; and
a switching element;
a first electrode; a second electrode; and a third electrode, wherein one of a pair of electrodes of the monitor light-emitting element is electrically connected to the first electrode, wherein the other of the pair of electrodes of the monitor light-emitting element is electrically connected to one of source and drain electrodes of the monitor transistor, wherein the other of the source and drain electrodes of the monitor transistor is electrically connected to a first input terminal of the amplifier circuit, wherein a gate electrode of the monitor transistor is electrically connected to an output terminal of the amplifier circuit, wherein the second electrode is electrically connected to a second input terminal of the amplifier circuit, wherein the third electrode is electrically connected to the other of the source and drain electrodes of the monitor transistor through the switching element, wherein a resistor is connected between the third electrode and the other of the source and drain electrodes of the monitor transistor, and wherein current flowing to the light-emitting element is controlled by the correction circuit.

2 . The semiconductor device according claim 1 , wherein the resistor is provided outside a wiring through which the other of the source and drain electrodes of the monitor transistor and the first input terminal of the amplifier circuit are connected to each other.

3 . The semiconductor device according to claim 1 , wherein the resistor includes an oxide conductor.

4 . The semiconductor device according to claim 3 , wherein the selection transistor, the driving transistor, and the monitor transistor each include an oxide semiconductor in a channel region.

5 . The semiconductor device according to claim 4 , wherein the oxide conductor and the oxide semiconductor contain at least one common metal element.

6 . The semiconductor device according to claim 4 , wherein one or both of the oxide conductor and the oxide semiconductor contain In, Zn, and M (M is Ti, Ga, Y, Zr, La, Ce, Nd, Sn, or Hf).

7 . The semiconductor device according to claim 4 ,
wherein one or both of the oxide conductor and the oxide semiconductor include a crystal part, and wherein the crystal part has c-axis alignment.

8 . A display device comprising:
the semiconductor device according to claim 1 ; and a color filter.

9 . A display module comprising:
the display device according to claim 8 ; and a touch sensor.

10 . An electronic device comprising:
the semiconductor device according to claim 1 ; and an operation key or a battery.

Assignees

• Semiconductor Energy Lab

Inventors

• Miyake Hiroyuki
• Shishido Hideaki
• Kawashima Susumu
• Yamazaki Shunpei

Classifications

• H05B45/37

  Converter circuits · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• H10D86/423

  comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO · CPC title