Hitachi, Ltd.

Hitachi Displays, Ltd.

Hitachi Electronic Devices Co., Ltd.

Masataka Natori

Takanori Nakayama

Takeshi Tanaka

Tetsuya Kawamura

Shiro Ueda

Tatsuo Kamei

Kuniyuki Matsunaga

Hikaru Itoh

Hikaru Ito

Hidetaka Hakoda

Hiroshi Ohkawara

Hitoshi Komeno

Junichi Ohwada

Masahiko Suzuki

Kimitoshi Ohgiichi

Masumi Sasuga

Osamu Nagashima

Akio Tezuka

Hisao Hirayama

Toshitsugu Miyawaki

Kimitoshi Oogiichi

Shunichi Kumaoka

Eisuke Hatakeyama

Tomoaki Kawada

Kazuya Nakamura

Hiroshi Ookawara

Kurando Shinba

Hikaru Itou

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

In a liquid crystal display device having the so-called side-edge type backlight system which comprises: a liquid crystal display panel; a light guide plate being disposed opposite to a main surface of the liquid crystal panel; and a linear lamp being disposed along one of sides of the light guide plate, the present invention provides a plurality of grooves at a corner area of an edge of the light guide plate along which the linear lamp is disposed so that the plurality of grooves are extended in a direction slanted to the edge of the light guide plate. In accordance with this structural feature, the present invention enables a high quality image display performance of the liquid crystal display panel by suppressing the display irregularity appearing therein effectively.

A liquid crystal display device includes first and second gate signal line formed on a first insulating substrate and arranged adjacent to one another, a terminal electrically connected to the first gate signal line, first and second thin-film transistors, a first pixel electrode electrically connected to an electrode of the first thin-film transistor, a second pixel electrode electrically connected to an electrode of the second thin-film transistor, a first and second video signal lines, a second insulating substrate which is transparent and superposed on the first insulating substrate, a transparent common electrode, and liquid crystals provided between the common electrode and the first and second pixel electrodes. A first light-shielding film is formed on the second insulating substrate and covers peripheries of the first and second pixel electrodes, and second light-shielding films are formed on the first insulating substrate.

LIQUID CRYSTAL DISPLAY DEVICE HAVING A PATTERN VARYING THE OVERLAP OF A LIGHT-SHIELD FILM CONNECTED TO THE NEIGHBORING GATE LINE AND THE PIXEL ELECTRODE TO IMPROVE VOLTAGE DIFFERENCE BETWEEN DIFFERENT PIXEL ELECTRODES

A liquid crystal display device can readily achieve uniformization of the threshold voltages of individual thin film transistors in spite of its simple construction. The liquid crystal display device includes gate signal lines juxtaposed in one direction, drain signal lines juxtaposed to intersect with the gate signal lines, thin film transistors which are respectively formed in areas each surrounded by the gate signal lines and the drain signal lines and are driven by supply of scanning signals from the gate signal lines, pixel electrodes to which video signals from the drain signal lines are to be supplied via the respective thin film transistors, a first terminal for applying voltages to the respective gate signal lines via diodes, and a second terminal for applying voltages to the respective drain signal lines via diodes.

A liquid crystal display device has gate signal lines extending in the x-direction and arranged in the y-direction, and drain signal lines extending in the y-direction and arranged in the x-direction on the surface of the liquid crystal side of the one transparent substrate between a pair of transparent substrates opposed to each other via liquid crystals. A thin-film transistor is fumed on by a scanning signal from a gate signal line, and a pixel electrode will be supplied with a video signal from the drain signal line via the thin-film transistor that is fumed on in each of the regions surrounded by the signal lines. The thin-film transistor is of the MIS type, and the capacity between the gate electrode and the source electrode thereof is small on the input terminal side of the gate signal line and increases in a direction toward the end of the gate signal line, thereby to suppress the occurrence of flickering.

Having a pattern for improving voltage difference between different pixel electrodes in which semiconductive or signal line portion is larger for a more remote pixel

A liquid crystal display capable of accommodating a common gate line in a proper position during the manufacture thereof has two transparent substrates opposed across a liquid crystal; a set of parallel gate lines extending in an x-direction on the surface of one of the transparent substrates, which faces the liquid crystal; a set of parallel drain lines extending in the y-direction on the surface and being insulated from the gate lines; and a gate scanning driver circuit connected with the individual gate lines outside of the display region in which the gate line set and the drain line set intersect. The common gate line is formed over a peripheral surface portion of the one transparent substrate, which surface portion is to be cut off at a subsequent manufacturing step, and is mounted on a region opposite to the gate scanning driver circuit on the other side of the display region therefrom for connecting the individual gate lines of the gate line set in common.

Common gate line layout method for liquid crystal display device with

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

Masataka Natori