Hitachi Displays, Ltd.

Katsuyoshi Ishihara

Tatsuo Hamamoto

Hironobu Yamada

There is disclosed a transflective liquid crystal display having pixels each including a reflective region and a transmissive region. The aperture ratio of the pixels can be enhanced. End portions of two adjacent color filters are overlapped to form an optically shielding portion for each pixel. The optically shielding portion and the reflective region cooperate to form an optically shielding film acting as a black matrix for the transmissive region. The aperture ratio is enhanced by improving the positional relationship between the reflective regions and the color filters.

Liquid crystal display device

In a liquid crystal display device includes a pair of substrates between which a liquid crystal layer filled, a plurality of pixel regions each of which includes a pixel electrode and an active element connected to the pixel electrode on a main surface of one of the pair of substrates, the present invention provides a first electrode layer electrically connected to the active element, a color filter layer formed over the first electrode layer and having an opening portion, and a second electrode layer covering the color filter layer, and utilizes the second electrode layer as the pixel electrode by connecting the second electrode layer to the first electrode layer electrically through the opening portion of the color filter layer. Since the liquid crystal display device according to the present invention allows light incident on the liquid crystal layer partially to pass through the opening portion of the color filter layer in each of the pixel regions, the luminance of the displayed image is increased without deteriorating the contrast.

Liquid crystal display device including an electrode constituting pixel electrode connected to another electrode through opening formed in color filter

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Mobara, Japan

Katsuyoshi Ishihara