US 5,339,181 AGranted

Liquid crystal display comprising a storage capacitor including the closed-ended electrode for providing a current bath for circumventing break

AssigneeSamsung Electronics Co., Ltd.

InventorsSang-soo Kim, In-sik Jang, Nam-deog Kim, Jeong-ha Son

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Abstract

An active matrix LCD which essentially differs from presently available active matrix LCDs in that the layout of a first electrode of a storage capacitor associated with each pixel thereof is modified in such a manner as to significantly increase the aperture and contrast ratios thereof relative to those of presently available active matrix LCDs. More particularly, the first electrodes of the storage capacitors are laid out in such a manner as to substantially surround their associated pixel electrodes, and preferably, only overlap a marginal edge portion of their associated pixel electrodes, about the periphery thereof.

Claims13

Dependent claims

A liquid crystal display, including:

a front glass substrate having inboard and outboard surfaces;
a rear glass substrate having inboard and outboard surfaces, and oriented in parallel, spaced-apart relation to said front glass substrate, with said inboard surfaces of said front and rear glass substrates facing each other;
a plurality of rows of scanning signal electrodes and columns of display signal electrodes arranged in a matrix configuration on said inboard surface of said rear glass substrate, to thereby define a matrix of pixel regions, each of which is bounded by two adjacent ones of said rows of scanning signal electrodes and two adjacent ones of said columns of display signal electrodes;
a pixel electrode disposed in each of said pixel regions;
a switching element disposed in each of said pixel regions and connected between a respective one of said display signal electrodes and a respective one of said pixel electrodes;
a storage capacitor disposed in each of said pixel regions, wherein each said storage capacitor includes a first electrode overlapping a marginal edge portion of a respective one of said pixel electrodes around the entire periphery thereof, whereby said first electrode is closed-ended;
a black matrix light shield layer disposed on said inboard surface of said front glass substrate, said black matrix light shield layer being patterned in such a manner as to define a matrix of light transmissive apertures aligned with said matrix of pixel regions;
a color filter layer disposed on said inboard surface of said front glass substrate and overlying said black matrix light shield layer, said color filter layer including light transmissive portions overlying said light transmissive apertures;
a transparent electrode disposed over said color filter layer;
and,
a layer of liquid crystal sandwiched between said front glass substrate and said rear glass substrate.

8 more elements

Dependencies are inferred from the claim text.