US 7,453,539 B2Granted

Active matrix type liquid crystal display device having a common line in every other pixel region

AssigneeHitachi Displays, Ltd.

InventorsAkira Matsuoka, Kikuo Ono

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Abstract

A display device with a plurality of gate signal lines extended in the first direction; a plurality of drain signal lines extended in the second direction; a plurality of pixel regions in a state that each pixel region includes a switching device, a pixel electrode which is connected with the drain signal line and a counter electrode. The counter electrode is formed with respect to the pixel electrode by way of an insulation film and is formed every pixel. The pixels include first pixels and second pixels, wherein only the first pixels have a counter voltage signal line which extends in the first direction, and the counter voltage signal line is connected with the counter electrodes in the first pixels. Further, the counter electrodes of the first pixels and the counter electrodes of the second pixels are electrically connected with each other using conductive stride over the gate signal line.

Claims15

Dependent claims

A liquid crystal display device comprising:

first and second substrates with a liquid crystal layer therebetween;
a plurality of gate signal lines which are formed on the first substrate and are extended in a first direction;
a plurality of drain signal lines which are formed on the first substrate and are extended in a second direction;
and
a plurality of pixel regions which are formed on the first substrate in a state that each pixel region includes a switching device, only one pixel electrode which is connected with the switching device and a counter electrode, wherein
the counter electrode is laminated by the pixel electrode through an insulation film in the pixel region,
the pixel regions include first pixel regions and second pixel regions, the first pixel regions share a counter voltage signal line which extends in the first direction therethrough, and the counter voltage signal line is connected with the counter electrodes in the first pixel regions,
the counter electrodes of the first pixel regions and the counter electrodes of the second pixel regions are electrically connected with each other through conductive layers which are formed as striding in the second direction over the gate signal lines, and
only the first pixel regions have said counter voltage signal line extending therethrough, and the second pixel regions have no counter voltage signal line extending therethrough.

6 more elements

A liquid crystal display device comprising:

first and second substrates with a liquid crystal layer therebetween;
a plurality of gate signal lines which are formed on the first substrate and are extended in the first direction;
a plurality of drain signal lines which are formed on the first substrate and are extended in the second direction;
and
a plurality of pixel regions which are formed on the first substrate in a state that each pixel region includes a switching device, a pixel electrode which is connected with the drain signal line and a counter electrode, wherein
the counter electrode is formed on the substrate side with respect to the pixel electrode by way of an insulation film and is formed every pixel,
the pixels include first pixels and second pixels, wherein only the first pixels out of the first pixels and the second pixels have a counter voltage signal line which extends in the first direction, and the counter voltage signal line is connected with the counter electrodes in the inside of the first pixels,
the counter electrodes of the first pixels and the counter electrodes of the second pixels are electrically connected with each other using conductive layers which are formed in a state that the conductive layers stride over the gate signal lines, and
the drain signal line has a width thereof set larger in the second pixel than in the first pixel.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/038,232Filed 21 Jan 2005
Priority: JP 2004-01990528 Jan 2004
Published: US 2005/0162601 A128 Jul 2005
Granted: 18 Nov 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G02F 1/134363
Characterised by their geometrical arrangement: for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
G02F 1/136286
Active matrix addressed cells: wiring, e.g. gate line, drain line
G02F
Optical devices or arrangements for the control of light by modification of