US 8,542,164 B2Granted

Display device

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorHajime Kimura

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Abstract

To provide a high-performance and highly reliable display device with a high aperture ratio, including light-emitting elements, and a manufacturing method thereof, and a technique for manufacturing such a display device at a low cost with high productivity. A compensating circuit, a light-emitting element, a switch, and a transistor are included, in which one terminal of the switch is electrically connected to the compensating circuit, a gate of the transistor is electrically connected to the compensating circuit, one of a source and a drain of the transistor is electrically connected to a first electrode of the light-emitting element, the other of the source and the drain of the transistor is maintained at a certain potential, and a second electrode of the light-emitting element and the other terminal of the switch are electrically connected to the same wire.

Claims25

Dependent claims

A display device comprising:

a wiring;
a light emitting element including a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer wherein the second electrode of the light emitting element is electrically connected to the wiring;
a capacitor including a first electrode and a second electrode;
a first transistor wherein one of a source and a drain of the first transistor is electrically connected to the first electrode of the light emitting element;
a second transistor wherein one of a source and a drain of the second transistor is electrically connected to the wiring and the other of the source and the drain of the second transistor is electrically connected to the first electrode of the capacitor;
a third transistor wherein a gate of the third transistor is electrically connected to the first electrode of the capacitor and one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
a fourth transistor wherein a gate of the fourth transistor is electrically connected to a gate of the first transistor and one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor;
a fifth transistor wherein one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and the drain of the second transistor;
and
a sixth transistor wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the third transistor.

7 more elements

A display device comprising:

a first wiring;
a second wiring;
a light emitting element including a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer wherein the second electrode of the light emitting element is electrically connected to the first wiring;
a capacitor including a first electrode and a second electrode;
a first transistor wherein one of a source and a drain of the first transistor is electrically connected to the first electrode of the light emitting element;
a second transistor wherein one of a source and a drain of the second transistor is electrically connected to the first wiring and the other of the source and the drain of the second transistor is electrically connected to the first electrode of the capacitor;
a third transistor wherein a gate of the third transistor is electrically connected to the first electrode of the capacitor and one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
a fourth transistor wherein a gate of the fourth transistor is electrically connected to a gate of the first transistor and one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor;
a fifth transistor wherein one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and the drain of the second transistor;
and
a sixth transistor wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the sixth transistor is electrically connected to the second wiring.

8 more elements

A display device comprising:

a first wiring;
a second wiring;
a third wiring;
a light emitting element including a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer wherein the second electrode of the light emitting element is electrically connected to the first wiring;
a capacitor including a first electrode and a second electrode wherein the second electrode of the capacitor is electrically connected to the third wiring;
a first transistor wherein one of a source and a drain of the first transistor is electrically connected to the first electrode of the light emitting element;
a second transistor wherein one of a source and a drain of the second transistor is electrically connected to the first wiring and the other of the source and the drain of the second transistor is electrically connected to the first electrode of the capacitor;
a third transistor wherein a gate of the third transistor is electrically connected to the first electrode of the capacitor and one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
a fourth transistor wherein a gate of the fourth transistor is electrically connected to a gate of the first transistor, one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor is electrically connected to the third wiring;
a fifth transistor wherein one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and the drain of the second transistor;
and
a sixth transistor wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the sixth transistor is electrically connected to the second wiring.

9 more elements

A display device comprising:

a first wiring;
a second wiring;
a third wiring;
a fourth wiring;
a light emitting element including a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer wherein the second electrode of the light emitting element is electrically connected to the first wiring;
a capacitor including a first electrode and a second electrode wherein the second electrode of the capacitor is electrically connected to the third wiring;
a first transistor wherein one of a source and a drain of the first transistor is electrically connected to the first electrode of the light emitting element;
a second transistor wherein a gate of the second transistor is electrically connected to the fourth wiring, one of a source and a drain of the second transistor is electrically connected to the first wiring and the other of the source and the drain of the second transistor is electrically connected to the first electrode of the capacitor;
a third transistor wherein a gate of the third transistor is electrically connected to the first electrode of the capacitor and one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
a fourth transistor wherein a gate of the fourth transistor is electrically connected to a gate of the first transistor, one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor is electrically connected to the third wiring;
a fifth transistor wherein one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and the drain of the second transistor;
and
a sixth transistor wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the sixth transistor is electrically connected to the second wiring.

10 more elements

A display device comprising:

a first wiring;
a second wiring;
a third wiring;
a fourth wiring;
a fifth wiring;
a light emitting element including a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer wherein the second electrode of the light emitting element is electrically connected to the first wiring;
a capacitor including a first electrode and a second electrode wherein the second electrode of the capacitor is electrically connected to the third wiring;
a first transistor wherein one of a source and a drain of the first transistor is electrically connected to the first electrode of the light emitting element;
a second transistor wherein a gate of the second transistor is electrically connected to the fourth wiring, one of a source and a drain of the second transistor is electrically connected to the first wiring and the other of the source and the drain of the second transistor is electrically connected to the first electrode of the capacitor;
a third transistor wherein a gate of the third transistor is electrically connected to the first electrode of the capacitor and one of a source and a drain of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
a fourth transistor wherein a gate of the fourth transistor is electrically connected to a gate of the first transistor, one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor is electrically connected to the third wiring;
a fifth transistor wherein a gate of the fifth transistor is electrically connected to the fifth wiring, one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and the drain of the second transistor;
and
a sixth transistor wherein a gate of the sixth transistor is electrically connected to the fifth wiring, one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the sixth transistor is electrically connected to the second wiring.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/726,409Filed 18 Mar 2010 · continuation
Priority: JP 2005-34534130 Nov 2005
Published: US 2010/0171685 A18 Jul 2010
Granted: 24 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/325
The current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor…
G09G 2300/0465
Pixel structures: improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum…
G09G 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing

Family

Application11/563,894Parent of this continuation · filed 28 Nov 2006
US 2010/0171685 A1Pre-grant publication · published 8 Jul 2010
US 7,692,610 B2Parent of this continuation
US 2007/0120785 A1Published application
US 8,542,164 B2This patent

From the US filing history. Foreign family members aren’t listed.

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