Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Other

Masayoshi Fujieda

Noboru Hoshino

Kazutoshi Yoshida

Yoshiaki Nakamura

Masao Uehara

Koji Hiraga

Souta Nemoto

Kouji Hayakawa

Satoshi Endo

Hisashi Yoshida

Yoshiyuki Imasaka

A liquid crystal display device includes a first transparent substrate having a plurality of electrodes, a second transparent substrate, a liquid crystal interposed between the first transparent substrate and the second transparent substrate, an illumination light source disposed on a back side of the first transparent substrate, pixel regions arranged in a matrix, and a reflecting film formed between the first transparent substrate and the electrodes. The reflecting film has at least one light transmission aperture in each pixel region and without slits at positions corresponding to gaps between adjacent ones of the pixel regions.

Liquid crystal display device

A liquid crystal is interposed between a first transparent substrate having first electrodes and a second transparent substrate having other electrodes. Pixel regions are formed at portions where the first electrodes and the other electrodes are opposed to each other. A semitransparent reflecting film is formed between the first transparent substrate and the first electrodes. The semitransparent reflecting film is formed with light transmission apertures in each pixel region. The semitransparent reflecting film also occupies portions corresponding to the gaps between the adjacent pixel regions. Alternatively, in addition to the light transmission apertures, the semitransparent reflecting film is formed with slits at positions corresponding to the gaps between the adjacent pixel regions. A light absorption film is formed between the first transparent substrate and the semitransparent reflecting film at positions corresponding to the slits, or the slits are charged with a light absorption film.

In order to provide a liquid crystal display device of high display quality by improving the evenness of a liquid crystal cell gap in a marginal frame portion of a liquid crystal element suited to a narrow frame, the liquid crystal display device is provided with a pair of liquid crystal display element substrates having a liquid crystal sandwiched therebetween, and a plurality of liquid crystal driving elements connected to conductors formed on each of the liquid crystal display element substrates, for driving the liquid crystal. Each of the liquid crystal display element substrates includes a plurality of display electrodes wired in parallel, a plurality of parallel terminal electrodes, mutually parallel oblique straight wiring electrodes, and a plurality of dummy electrodes generally parallel to the terminal electrodes. Each of the conductor electrodes is formed so that the variation in wiring resistance between a central portion and an end portion of each of the liquid crystal driving circuits and the variation in area occupation ratio per unit area of the wiring disposed below the sealing material are smaller than predetermined allowable values, respectively.

Liquid crystal display device suited to narrow frame

A liquid crystal display device includes a liquid crystal display panel. The liquid crystal display panel includes a first transparent substrate having color filters arranged in a predetermined order, a patterned light blocking film formed between the color filters and first transparent electrodes formed on the color filters; a second transparent substrate having second transparent electrodes arranged to intersect the first transparent electrodes; a liquid crystal layer sandwiched between the first and second transparent substrates with the first and second transparent electrodes opposing each other and spacers dispersed between the first and second transparent substrates. The color filters and the light blocking film extend into a marginal area outside an area optically switchable upon application of an electric field on the liquid crystal display panel in substantially the same geometric pattern as within the optically switchable area. A plurality of dummy electrodes can also be formed in the marginal area on at least one of the first and second substrates, so as to oppose the transparent electrodes on the opposite substrate. The extension of the color filters and the light blocking film into a marginal area and the disposition of the dummy electrodes in the marginal area can be applied in one liquid crystal display panel, singly or in combination.

Liquid crystal display device with unequal sized dummy sub-electrodes

Growing community of inventors

Ohara, Japan

Masayoshi Fujieda