Hitachi, Ltd.

Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Hitachi Device Engineering Co., Ltd.

Other

Hiroshi Okawara

Tetsuya Kawamura

Nobuyuki Ishige

Yoshihiro Imajo

Shiro Ueda

Kimitoshi Ohgiichi

Fumiaki Komori

Tetsuro Izawa

Hisashi Ishino

Takeshi Tanaka

Kouichi Anno

Kikuo Ono

Satoru Inarida

Masaaki Matsuda

Takumi Tokushima

Akira Sagawa

A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.

Driving method for display device

A display device having a substrate, and a display area and a peripheral area being formed on the substrate. A signal line is extended from the display area to the peripheral area on the substrate, and the signal line at the peripheral area is covered with a first insulating film, a semiconductor layer, and a second insulating film in this order.

Display device with signal line extended from display area to peripheral area being covered in peripheral area

In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the plurality of drain drivers. This liquid crystal display device has an advantage, for instance, or of suppressing electromagnetic interference (EMI) to another equipment surrounding the liquid crystal display device, of preventing the display data signals or the clock signal from being distorted in the wiring lines.

Display device

Liquid crystal display device

For preventing corrosion of signal lines (conductive layers for supplying signals to pixel areas) which are formed over one of a pair of substrates of a liquid crystal display device and are disposed so as to extend from the inside of an area surrounded by a sealing material toward the outside of the area, that at least one of the signal lines is covered with stacked layers formed of a first insulating film, a semiconductor layer, and a second insulating film formed sequentially over the at least one of the signal lines in this order.

Liquid crystal display device having particular stacked layered structure at peripheral portion

A technique is provided for eliminating on-screen display irregularities or defects otherwise occurring due to re-attachment of flying fragments or the presence of residual cutaway portions during electrode cutting processes using laser light. During manufacture of an active-matrix substrate, a separator section is used to connect image signal electrode lead terminals in common together to an electrostatic protective lead to perform electrostatic protection of thin-film transistors, and the separator section is comprised of a laminated structure of a low-resistivity metal layer and high-melting-point metal layer.

A is employed for eliminating variations of thin-film transistor threshold values to obtain enhanced on-screen displayability of high-quality images while simultaneously increasing the manufacturing yield and reliability. In a liquid crystal display device including: an active-matrix substrate having a plurality of scan electrode leads, a plurality of image signal electrode leads crossing over the plurality of scan electrode leads, scan electrode lead terminals which extend from the scan electrode leads in an effective display area thereof to one of the sides thereof, and image signal electrode terminals which extend from the image signal electrode leads in the effective display area to the other of the sides thereof neighboring upon the one side, being formed on an upper surface thereof respectively; a color filter substrate having a common electrode formed thereon; a layer of liquid crystals being sealed between the active-matrix substrate and the color filter substrate; common electrode lead terminals for connection to the common electrode; and driver circuitry including a scan electrode driver circuit and image signal electrode driver circuit for supplying the scan electrode lead terminals and image signal electrode lead terminals with more than one signal voltage for on-screen image visualization. The device further has a first electrostatic protective element for connecting a respective odd-numbered one of the image signal electrode terminals and a second electrostatic protective element for connecting a respective even-numbered one of the image signal electrode terminals. The first and second electrostatic protective leads are electrically divided into one another on the matrix substrate and electrically connected to one another by the common electrode lead terminals.

Growing community of inventors

Mobara, Japan

Hiroshi Okawara