US 8,941,127 B2Granted

Field-sequential display device

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorsJun Koyama, Toshikazu Kondo, Shunpei Yamazaki

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Abstract

A first transistor in which an image signal is input to one of a first source and a first drain through an image signal line and a first scan signal is input to the first gate through a first scan signal line; a capacitor whose one of two electrodes is electrically connected to the other of the first source and the first drain of the first transistor; a second transistor in which one of a second source and a second drain is electrically connected to the other of the first source and the first drain of the first transistor and a second scan signal is input to a second gate through a second scan signal line; and a liquid crystal element whose first electrode is electrically connected to the other of the second source and the second drain of the second transistor.

Claims20

Dependent claims

A field-sequential display device comprising:

an image signal line comprising a first conductive layer;
a first scan signal line;
a second scan signal line comprising a second conductive layer;
a first transistor comprising a first source, a first drain, and a first gate, in which an image signal is input to one of the first source and the first drain through the image signal line and a first scan signal is input to the first gate through the first scan signal line;
a second transistor comprising a second source, a second drain, and a second gate, in which one of the second source and the second drain is electrically connected to the other of the first source and the first drain of the first transistor and a second scan signal is input to the second gate through the second scan signal line;
and
a liquid crystal element which comprises a first electrode, a second electrode, and a liquid crystal layer which is applied with a voltage by the first and second electrodes, in which the first electrode is electrically connected to the other of the second source and the second drain of the second transistor,
wherein the first conductive layer and the second conductive layer are substantially parallel to each other, and
wherein the first conductive layer and the second conductive layer are not overlapped with each other.

6 more elements

A field-sequential display device comprising:

an image signal line comprising a first conductive layer;
a first scan signal line;
a second scan signal line comprising a second conductive layer;
a third scan signal line comprising a third conductive layer;
a first transistor comprising a first source, a first drain, and a first gate, in which an image signal is input to one of the first source and the first drain through the image signal line and a first scan signal is input to the first gate through the first scan signal line;
a second transistor comprising a second source, a second drain, and a second gate, in which one of the second source and the second drain is electrically connected to the other of the first source and the first drain of the first transistor and a second scan signal is input to the second gate through the second scan signal line;
a liquid crystal element which comprises a first electrode, a second electrode, and a liquid crystal layer which is applied with a voltage by the first and second electrodes, in which the first electrode is electrically connected to the other of the second source and the second drain of the second transistor;
and
a third transistor comprising a third source, a third drain, and a third gate, in which a reset voltage is input to one of the third source and the third drain, the other of the third source and the third drain is electrically connected to the first electrode of the liquid crystal element, and a third scan signal is input to the third gate through the third scan signal line,
wherein the first conductive layer and the second conductive layer are substantially parallel to each other, and
wherein the first conductive layer and the second conductive layer are not overlapped with each other.

8 more elements

A field-sequential display device comprising:

an image signal line comprising a first conductive layer;
a first scan signal line;
a second scan signal line comprising a second conductive layer;
a first transistor comprising a first source, a first drain, and a first gate, in which an image signal is input to one of the first source and the first drain through the image signal line and a first scan signal is input to the first gate through the first scan signal line;
a second transistor comprising a second source, a second drain, and a second gate, in which one of the second source and the second drain is electrically connected to the other of the first source and the first drain of the first transistor and a second scan signal is input to the second gate through the second scan signal line;
and
a liquid crystal element which comprises a first electrode, a second electrode, and a liquid crystal layer which is applied with a voltage by the first and second electrodes, in which the first electrode is electrically connected to the other of the second source and the second drain of the second transistor,
wherein the first conductive layer and the second conductive layer are substantially parallel to each other,
wherein the first conductive layer and the second conductive layer are not overlapped with each other, and
wherein the first transistor and the second transistor comprise an oxide semiconductor layer.

7 more elements

A field-sequential display device comprising:

an image signal line comprising a first conductive layer;
a first scan signal line;
a second scan signal line comprising a second conductive layer;
a third scan signal line comprising a third conductive layer;
a first transistor comprising a first source, a first drain, and a first gate, in which an image signal is input to one of the first source and the first drain through the image signal line and a first scan signal is input to the first gate through the first scan signal line;
a second transistor comprising a second source, a second drain, and a second gate, in which one of the second source and the second drain is electrically connected to the other of the first source and the first drain of the first transistor and a second scan signal is input to the second gate through the second scan signal line;
a liquid crystal element which comprises a first electrode, a second electrode, and a liquid crystal layer which is applied with a voltage by the first and second electrodes, in which the first electrode is electrically connected to the other of the second source and the second drain of the second transistor;
and
a third transistor comprising a third source, a third drain, and a third gate, in which a reset voltage is input to one of the third source and the third drain, the other of the third source and the third drain is electrically connected to the first electrode of the liquid crystal element, and a third scan signal is input to the third gate through the third scan signal line,
wherein the first conductive layer and the second conductive layer are substantially parallel to each other,
wherein the first conductive layer and the second conductive layer are not overlapped with each other, and
wherein the first transistor, the second transistor, and the third transistor comprise an oxide semiconductor layer.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/070,807Filed 24 Mar 2011
Priority: JP 2010-08334531 Mar 2010
Published: US 2011/0241011 A16 Oct 2011
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G02F 1/13624
Active matrix addressed cells: having more than one switching element per pixel
G09G 3/3648
Control of matrices with row and column drivers: using an active matrix
H10D 86/423
Having a particular composition, shape or crystalline structure of the active layer: comprising semiconductor materials not belonging to the Group…
H10D 86/60
Characterised by multiple TFTs: wherein the TFTs are in active matrices