Hitachi, Ltd.

Hitachi Displays, Ltd.

Hikaru Ito

Masataka Natori

Kuniyuki Matsunaga

Takanori Nakayama

Masahiko Suzuki

Junichi Ohwada

Shiro Ueda

Kimitoshi Ohgiichi

Masumi Sasuga

Osamu Nagashima

Kimitoshi Oogiichi

Eisuke Hatakeyama

Kurando Shinba

A liquid crystal display device is provided to prevent gas bubbles from being generated due to the contact of an inspection probe. An insulating film composed of a gate insulating film and a protection film is formed on a gate wire and wire inspection terminal, and is partially removed from an upper surface of the wire inspection terminal to form a concave portion exposing the top surface of the wire inspection terminal. A transparent conductive film made of ITO is formed on the insulating film, including the concave portion on the wire inspection terminal. The transparent conductive film is electrically connected with the wire inspection terminal at the concave portion, and formed extending onto the gate insulating film and protection film on the opposite side of a scanning wire of the wire inspection terminal. Disconnection inspection is performed using the extending portion as a contact portion with an inspection probe.

Liquid crystal display device

A liquid crystal display device, or more particularly, an active matrix type liquid crystal display device having a pixel electrode formed in a pixel field defined on one of two transparent substrates opposed to each other with a liquid crystal layer between them. The pixel electrode is overlapped a signal line, which is formed in a portion of the one transparent substrate coincident with a black matrix, with a dielectric between them. The width of the overlap is set to a value satisfying a condition that an electric field induced between the signal line and pixel electrode will not invade into the pixel field defined with the black matrix. Owing to the structure, inhomogeneous luminance caused by a source electrode of a thin film transistor can be avoided. Moreover, inhomogeneous luminance caused by a capacitive element can be avoided.

A liquid crystal display device is provided which reduces the resistance of input wires disposed between a flexible board and driving ICs mounted in a flip-chip style, and enhances resistance against electrocorrosion of input terminals thereof. The liquid crystal display device includes two transparent insulating substrates (SUB1, SUB2) confronting each other through a liquid crystal layer, plural liquid crystal driving circuits (ICs) mounted in a flip-chip style on a surface of one of the substrates located at the side of the liquid crystal layer, a flexible board (FPC) for inputting a signal to each of the liquid crystal driving circuits, and plural input wires (Td) provided on the surface of the one substrate at the side of the liquid crystal layer to connect output terminals of the flexible board to input terminals of the liquid crystal driving circuits. Each input wire includes a first metal layer (g1) in the vicinity of the surface of the substrate, a transparent conductive layer (d1) laminated on the first metal layer, connected to the input terminals of the flexible board, with open portions in the neighborhood of the input terminals of the liquid crystal driving circuits and in the neighborhood of the output terminals of the flexible board, a second metal layer (d2) laminated on the transparent conductive film and connected to the first metal layer at the open portions, and a protection film (PSV1) covering at least the second metal layer.

LCD device having driving circuits with multilayer external terminals

Growing community of inventors

Mobara, Japan

Hikaru Ito