Kabushiki Kaisha Toshiba

Toshiba Matsushita Display Technology Co., Ltd.

Katsuhiko Inada

Tetsuya Kawamura

Tetsuo Morita

Atsushi Sugahara

Osamu Shimada

Yasuyuki Hanazawa

Masahiro Seiki

Ryuji Tada

Hideyuki Takahashi

Shinichi Kawamura

Tetsuya Iizuka

Hiroshi Tabatake

Akira Kubo

Kohei Nagayama

Masayuki Dohjo

Yasuharu Tanaka

Yoshihiro Asai

Yasushi Sasaki

Tomoko Kitazawa

Nobuo Imai

Koichi Shiba

Atsushi Takeda

Akihiro Takami

Akimasa Toyama

A circuit array substrate includes an optically transparent substrate, pixels having switching elements formed on the transparent substrate, gate electrode lines connected to the switching elements, the gate electrode lines being provided on a first insulation film with separating portions in the pixels, signal lines connected to the switching elements, the signal lines being provided on a second insulation film which is different from the first insulation film, and electrically conductive portions provided on the second film to electrically connect the electrode lines with the separating portions to each other. The separating portions reduce electrostatic capacitances defined between the gate electrode lines and the switching elements when the conductive portions are not connected between the separating portions.

Method of fabricating a circuit array substrate

A thin-film transistor substrate includes a pixel region where gate electrode lines are arranged on an insulating substrate sandwiching semiconductor layer patterns and a gate insulator with the insulating substrate, wherein shapes of the semiconductor patterns and the gate electrode lines are set so that a value of K obtained by the following equation is smaller than a first set value when the thin-film transistor substrate is mounted on a metal table:=()&#xd7;{()}&#xd7;where Ca represents a capacitor between each of the semiconductor layer patterns and the metal table, Cb represents a capacitor between each of the semiconductor layer patterns and the gate electrode lines, Ce represents a capacitor between each of the gate electrode lines and the metal table, L represents a length of each of the gate electrode line, and S represents a substrate surface area that one of the gate electrode lines are in charge of per unit length.

Thin-film transistor substrate including pixel regions where gate electrode lines are arrayed on an insulating substrate, and display therewith

To suppress occurrence of low temperature bubbles while securing pressure resistance to external forces applied to substrates of a liquid crystal display device, a plurality of spacers disposed between the substrates are divided into a plurality of spacer groups, one unit of which is configured with spacersallocated in close proximity to each other; and the spacer groupsare disposed with a density that the low temperature bubbles do not occur. Hence, the strength of the substrates increases, and in a regionwhere no spacers exist, a large deformation of the substrates by shrinkage is allowed, and a liquid crystal layeris sufficiently enough shrunk even under a low temperature environment to prevent the low temperature bubbles from occurring.

Liquid crystal display device having particular interval between spacer groups

A signal line driving circuit makes the polarities of video signals different from each other, the video signal being supplied to pixel electrodes adjacent to an arbitrary pixel electrode on both sides thereof in a horizontal scanning direction. The signal line driving circuit also makes the polarities of video signals different from each other, the video signal being supplied to pixel electrodes adjacent to the arbitrary pixel electrode on both sides thereof in a vertical scanning direction. A signal line driving IC outputs the video signal to each signal line group obtained by dividing a plurality of signal lines to a plurality of signal line groups composed of a predetermined number of the signal lines. A signal line switching circuit switches all of the signal lines in each signal line group sequentially during one horizontal scanning period.

Liquid crystal display device having a circuit for controlling polarity of video signal for each pixel

A display device includes a substrate (), pixel electrodes (PIX) formed on the substrate (), scanning lines (G) to transmit scanning signals, signal lines (S) divided into four groups (LL, LR, RL and RR) to transmit data signals, signal line driving circuits () to drive the groups (LL, LR, RL and RR) of the signal lines (S), respectively, analog switch control signal lines (and) connected between the signal line driving circuits () and the groups (LL, LR, RL and RR) of the signal lines (S), and transistors (ASW) connected between the analog switch control signal lines (and) and the groups (LL, LR, RL and RR) of the signal lines (S) to provide the data signals to the pixel electrodes (PIX) in response to the scanning signals. An electrical path length between the signal line driving circuits () and a point (A) of the analog switch control signal lines (and) provided at a boundary region between the groups (LL and LR), for example, of the signal lines (S) is configured to be substantially the same as the one between the signal line driving circuits () and a point (B) of the analog switch control signal lines (and) provided at a boundary region between the groups (LL and LR) of the signal lines (S).

Display device

A redundant wiring apparatus used for a liquid crystal display apparatus and a method of a making the same are disclosed. The liquid crystal display device includes a switching circuit array substrate and a counter substrate provided opposite to the array substrate. Signal and scanning lines are disposed on the array substrate in a matrix form. The signal and scanning lines are connected pixel electrodes through the switching circuits formed on the array substrate. A display region and a surrounding region are provided on the array substrate. The signal and scanning lines have lead wires extending from the display region to the surrounding region. The lead wires are redundant in wiring structure in which a first wire, an insulation layer and a second wire are laminated. The first and second wires are electrically connected through connectors received in through-holes at both ends of the first wire. Repair portions of the first and second wires are provided in the vicinity of through-holes. The repair portions are not overlapped with each other for the convenience of repair. When the first or/and second wires of neighboring lead wires are sort-circuited, the repair portions of the first and second wires are cut off to repair by irradiating laser beams.

Redundant wiring apparatus and a method of making the same

A method of manufacturing an array substrate for a display device having a surface area including a display area having a plurality of pixel electrode arranged on a main surface of an insulating substrate, a peripheral area positioned at the outside of the display area to supply a drive voltage to the display area, and a mark area positioned at the outside of the peripheral area, including the steps of forming a first layer on a main surface of the insulating substrate, forming a resist on the first layer, and patterning the first layer by exposing the resist using a plurality of mask patterns which correspond to each area obtained by dividing of the surface area, wherein adjacent divided areas of the first substrate area and the second substrate area are patterned with a common mask having two mask patterns each used in each of the first substrate area and the second substrate area of each area obtained by dividing of the surface area. According to the present invention, in spite of using the highly accurate exposure technique, increases in manufacturing time and cost can be restrained in manufacturing the array substrate for the display device.

Method of manufacturing liquid crystal display device

The present invention relates to the structure of an active matrix type liquid crystal display device in which a channel length of a thin film transistor without increasing resistance of a scanning line region to improve a switching characteristic. A slit is formed at the channel of the thin film transistor formed on the scanning line region. The slit is used as a mask and a pattern of a channel protection film for determining the channel of the thin film transistor is formed by exposure form a back surface of a substrate. According to this method, a desirable channel length can be obtained, and the scanning line region, facing to the channel through the slit, functions as an auxiliary region, so that the resistance of the scanning line region can be reduced.

Liquid crystal display device comprises a plurality of TFTs with a

An object of the technology of our invention is to solve a luminance defect viewed as a 'seam' or the like and to provide a liquid crystal display device having a screen for equally displaying an image. For example, when an exposing process is performed for one conductor layer or a dielectric layer, a total of four photomasks are used corresponding to four shot areas. A light insulation layer of a photomask used for the exposing process for patterning for example a signal line is formed so that it becomes a projection pattern of the signal line. The photomasks corresponding to adjacent shot areas are formed so that patterns of the light insulation layers of the boundary portion are engaged with each other on the plane.

Display device in which display regions have non-linear boundaries and

Method of fabricating a display device

A liquid crystal display device having an array substrate. The substrate has: (1) an insulating transparent substrate that has a pixel region and a non-pixel region, (2) a plurality of thin film transistors disposed in a matrix pattern on a display screen, each thin film transistor having a gate insulating film that is produced by an atmosphere pressure chemical vapor deposition; (3) a plurality of display pixel electrodes formed on the pixel region of the insulating transparent substrate, each display pixel electrode being connected to each of the thin film transistors; and (4) a protecting film formed on the non-pixel region of the insulating transparent substrate, the protecting film extends from the non-pixel region and overlaps a peripheral portion of each of the display pixel electrodes that are disposed in a portion of the display screen by a width of 2 .mu.m to 7 .mu.m. The display also has a counter substrate that is disposed apart from and facing the array substrate. A sealant layer is disposed at peripheries of the array substrate and the counter substrate so as to seal a space between the array substrate and the counter substrate and is provided with a liquid crystal-inlet port. A liquid crystal layer fills in a space between the array substrate and the counter substrate. The liquid crystal layer being injected in the space from the liquid crystal-inlet port. A closing layer is used to close the liquid crystal-inlet port.

Growing community of inventors

Saitama-ken, Japan

Katsuhiko Inada