IP Library › Granted Patent US 8,064,026
Granted Patent B2
US 8,064,026 · App. 12/801,621 · Granted Nov 22, 2011

Liquid crystal display device with the pixel electrode being electrically coupled to the active element via a portion defining a clearance between the counter electrodes

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Quick Facts
Patent No.
US 8,064,026
App. No.
12/801,621
Filed
Jun 17, 2010
Granted
Nov 22, 2011
Kind
B2
Art Unit
2883
USPC
349/43
Abstract

A liquid crystal display device having a liquid crystal display panel includes a first substrate, a second substrate, and liquid crystal interposed between the first and second substrates. The first substrate includes an active element, a first insulating film formed on the active element, a plurality of first electrodes disposed on the first insulating film, a second insulating film disposed on the first electrodes, and a pixel electrode disposed on the second insulating film. The pixel electrode is electrically coupled to the active element via a portion defining a contact hole formed in a portion defining a clearance between the plurality of first electrodes.

Claims (28)

1. A liquid crystal display device including a liquid crystal display panel having a plurality of subpixels, comprising:

a first substrate, the first substrate including:

an active element;

a first insulating film formed on the active element;

a plurality of first electrodes formed in each of the subpixels, said plurality of first electrodes being disposed on the first insulating film;

said plurality of first electrodes being insulated from each other,

a second insulating film disposed on the first electrodes; and

a pixel electrode disposed on the second insulating film, the pixel electrode being electrically coupled to the active element via a portion defining a contact hole formed in a portion defining a clearance between the plurality of first electrodes;

a second substrate; and

liquid crystal interposed between the first and second substrates;

wherein the first electrodes are counter electrodes; and

the liquid crystal is driven by an electric field generated by the first electrodes and the pixel electrode.

2. The liquid crystal display device according to claim 1 ,

wherein the first insulating film has a portion defining a first contact hole formed in a portion defining a clearance between the plurality of first electrodes;

the second insulating film is formed between the first electrodes and the pixel electrode, and inside the portion defining a first contact hole;

a portion defining a second contact hole is formed in the second insulating film inside the portion defining a first contact hole; and

the pixel electrode is electrically coupled to the active element via the portion defining a second contact hole.

3. The liquid crystal display device according to claim 1 , wherein each of portions of edges of the first electrodes in which the portion defining a clearance is formed and in which the portion defining a contact hole is formed has a recess.

4. The liquid crystal display device according to claim 1 ,

wherein the pixel electrode, the first electrodes, and the second insulating film form a holding capacitance.

5. The liquid crystal display device according to claim 1 ,

wherein the pixel electrode is a transparent electrode.

6. The liquid crystal display device according to claim 1 ,

wherein the first electrodes include a transparent electrode.

7. The liquid crystal display device according to claim 1 ,

wherein the first electrodes include a reflection electrode.

8. The liquid crystal display device according to claim 1 ,

wherein the first electrodes include a transparent electrode and a reflection electrode.