Active matrix liquid crystal display device
AssigneeNEC LCD Technologies, Ltd.
InventorHironori Kikkawa
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Abstract
An active matrix LCD device includes a pixel element for defining a pixel area and having a TFT and a pixel electrode disposed in association with a portion of a common electrode. The common electrode encircles the pixel area for shielding the electric field from the black matrix, thereby preventing a stray electric field from entering the pixel area and degrading the image quality.
Claims8
An active matrix liquid crystal display (LCD) device comprising first and second transparent substrates, liquid crystal sandwiched between said first transparent substrate and said second transparent substrate, said first transparent substrate including a plurality of pixel elements arranged in a matrix, each of said pixel elements defining a pixel area for image display and having a thin film transistor (TFT) and a pixel electrode connected to a drain of said TFT, a plurality of scanning lines each connected to gates of said TFTs in a corresponding row of said pixel elements, a plurality of signal lines each connected to a source of said TFTs in a corresponding column of said pixel elements, and a common electrode having an electrode portion disposed for each of said pixel elements in association with said pixel electrode, one of said first transparent substrate and said second transparent substrate including a black matrix for covering an area other than said pixel area as viewed in a first direction perpendicular to said first and second substrates, said electrode portion of said common electrode encircling said pixel area as viewed in said first direction.
An active matrix liquid crystal display (LCD) device comprising first and second transparent substrates, liquid crystal sandwiched between said first transparent substrate and said second transparent substrate, said first transparent substrate including a plurality of pixel elements arranged in a matrix, each of said pixel elements defining a pixel area for image display and having a thin film transistor (TFT) and a pixel electrode connected to a drain of said TFT, a plurality of scanning lines each connected to gates of said TFTs in a corresponding row of said pixel elements, a plurality of signal lines each connected to a source of said TFTs in a corresponding column of said pixel elements, and a common electrode having an electrode portion disposed for each of said pixel elements in association with said pixel electrode, one of said first transparent substrate and said second transparent substrate including a black matrix for covering an area other than said pixel area as viewed in a first direction perpendicular to said first and second substrates, said black matrix being electrically connected to said common electrode.
Dependencies are inferred from the claim text.