Back to results
US 7,352,425 B2Granted
Liquid crystal display device
AssigneeHitachi Displays, Ltd.
InventorsKikuo Ono, Ikuko Mori, Ryutaro Oke, Hiroyuki Yarita
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHitachi Displays, Ltd.
InventorsKikuo Ono, Ikuko Mori, Ryutaro Oke, Hiroyuki Yarita
Estimating the term…
In a liquid crystal display device including a pair of substrates which face each other with a liquid crystal layer disposed therebetween, a plurality of pixel regions which are formed on one substrate, a planar counter electrode which is formed on each pixel region, and a comb-shaped or slit-shaped pixel electrode which is formed on each pixel region, the comb-shaped or slit-shaped pixel electrode being formed over the counter electrode by way of an insulation layer, a notch or a slit is formed in the counter electrode such that a wiring layer made of an opaque material which transmits a potential to the pixel electrode from a thin film transistor defines a region where the wiring layer is not overlapped relative to the counter electrode.
A liquid crystal display device comprising:
A liquid crystal display device comprising:
A liquid crystal display device comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Active matrix addressed cells: through-hole connection of the pixel electrode to the active element through an insulation layer
Characterised by their geometrical arrangement: for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
Optical devices or arrangements for the control of light by modification of
Term ended 6 Sep 2026 (estimated)
The present invention relates in general to a liquid crystal display device, and, more particularly, the invention relates to a liquid crystal display device in which pixel electrodes and counter electrodes are formed on a liquid-crystal-surface side of one substrate of respective substrates which are arranged to face each other with liquid crystal disposed therebetween.
Recently, consideration has been given to a liquid crystal display device having a constitution in which a counter electrode, which is formed as a transparent electrode, is formed over the whole area of a pixel region, except for a periphery of the pixel region, and strip-like pixel electrodes formed as transparent electrodes, which extend in one direction and are arranged in parallel in a direction which intersects the one direction, are formed over the counter electrode by way of an insulation film.
Such a liquid crystal display device is disclosed in Japanese Unexamined Patent Publication Hei 11(1999)-202356 and the corresponding U.S. Pat. No. 6,233,034.
FIG. 1 is a plan view showing one embodiment of a pixel region of a liquid crystal display device according to the present invention;
FIG. 2 is an equivalent circuit diagram showing one embodiment of the liquid crystal display device according to the present invention;
FIG. 3 is a cross-sectional view taken along a line I(a)-I(b) in FIG. 1;
Preferred embodiments of the liquid crystal display device of the present invention will be explained hereinafter in conjunction with the drawings.
FIG. 2 shows an equivalent circuit of a liquid crystal display panel representing one embodiment of the present invention, together with an externally mounted circuit of the liquid crystal display panel.
In FIG. 2, to respective gate signal lines GL, which extend in the x direction and are arranged in parallel in the y direction, a scanning signal (a voltage signal) is sequentially supplied by a vertical scanning circuit V.