Kabushiki Kaisha Toshiba

Hisaaki Hayashi

Sakae Yoshida

Makoto Shibusawa

Norihiko Kamiura

Tomiaki Yamamoto

Koichi Shiba

Masanobu Nonaka

Osamu Hoshino

Noboru Kashimoto

An electric field shielding wiring is provided in the gap between the pixel electrodes adjacent in parallel to the signal line, to minimize the inter-electrode parasitic capacity generated in the gap between the pixel electrodes, which is caused by the change in the pixel potential of the pixel electrode when the polarity of the signal line potential is changed, and prevent an increase in the pixel potential of the pixel electrode of the previous stage.

Plane display element

An active matrix-liquid crystal display device includes an array substrate on which pixel electrodes , signal lines with first and second conductive layers and are formed. The first conductive layers and the pixel electrodes are subject to patterning using a same mask in a same optical exposure process. The first conductive layers are wider in width than the second conductive layers . The pixel electrodes and the signal lines maintain constant relative positions on display areas thereby to hardly cause unevenness of resultant images and to enable the device to display better dignity images.

TFT-type LCD and method of making with pixel electrodes and bus lines having two layers

A liquid crystal layer is sealed between an array substrate and an opposed substrate arranged to oppose each other with a gap. A multiplicity of particulate spacers are arranged between the array and opposed substrates to maintain the gap therebetween. The array substrate is formed with a transparent insulating film covering signal lines, scanning lines, switching elements and pixel electrodes. The areas of the insulating film opposing the respective pixel electrodes are each formed with a plurality of apertures for limiting the movement of the spacers.

Active matrix LCD with insulating film having apertures for limiting

A conductor layer is formed on a glass substrate of a liquid-crystal display device, and a resist layer is formed on the conductor layer. The resist layer is dividedly exposed into a plurality of divided regions. Then the conductor layer is etched through the resist layer and patterned. At the time of the division exposure, a boundary line of each of the respective divided regions is formed in a zigzag shape and engaged with a boundary line of another adjacent one of the divided regions. The zigzag-shaped boundary line of each divided region has such a pattern as to extend into another diagonally opposed one of the divided regions at a cross-shaped region where a vertical boundary line horizontally dividing the divided regions and a horizontal boundary line vertically dividing the divided regions intersect at right angles.

Method of manufacturing liquid-crystal display device having a plurality

In an active-matrix type liquid crystal display device, a dummy scanning line is provided at a higher position than the top of ordinary scanning liens in the case that a scanning operation is performed from the top of a display region to the bottom thereof. Alternatively, such a dummy scanning line is disposed at a lower position than the bottom of ordinary scanning lines where the scanning operation is performed from the bottom of the display region to the top thereof. Scanning pulses to turn on switching elements as well as compensation pulses are applied to the dummy scanning line as to the ordinary scanning lines to obtain a uniform brightness display on a screen of the active-matrix type liquid crystal display device.

Driving method of a liquid crystal display device

A liquid crystal display device includes an array substrate provided with pixel electrodes and a counter electrode provided opposite to the array substrate, and a liquid crystal layer held between the array and counter substrates. The liquid crystal layer, and the array and counter electrode define a liquid crystal capacitor. The array substrate disposed on an insulation substrate includes a plurality of signal and scanning lines crossing each other. A thin film transistor is provided in the vicinity of each crossing point. The thin film transistor is connected to the pixel electrode. A storage capacitance is defined between the pixel electrode and a storage capacitance line. A parasitic capacitance is further defined between the pixel electrode and the signal line. The parasitic capacitance is 4% or less of an entire pixel capacitance including the liquid crystal, storage and parasitic capacitance in order to avoid crosstalk between the pixels.

Active-matrix type liquid crystal display device

A circuit array substrate for a display device includes a plurality of parallel signal and scanning lines disposed on an insulation substrate which cross each other at a right angle. The signal lines are made of at least upper and lower laminated layers. The upper layers made of aluminum or aluminum alloy are wider in width at the crossing portions with said scanning lines than the lower layers made of indium tin oxide. If the lower layers have cracks at the crossing portions during their patterning process, the wider upper layers cover the lower layers to keep etchant for the aluminum from soaking into the cracks. Thus, such a structure of the signal lines avoids causing the signal lines to break or malfunction.

Circuit array substrate for a display device and a method of making the

An active matrix-liquid crystal display device includes an array substrate 100 on which pixel electrodes 151, signal lines 103 with first and second conductive layers 103a and 103b are formed. The first conductive layers 103a and the pixel electrodes 151 are subject to patterning using a same mask in a same optical exposure process. The first conductive layers 103a are wider in width than the second conductive layers 103b. The pixel electrodes 151 and the signal lines 103 maintain constant relative positions on display areas thereby to hardly cause unevenness of resultant images and to enable the device to display better dignity images.

Active matrix-type liquid crystal display device and method of making

A semiconductor device comprising a matrix array, an auxiliary line, and static electricity discharging circuit. The matrix array has a plurality of address lines, a plurality of data lines, and switching elements provided at intersections of the address lines and the data lines. The auxiliary line surrounds the matrix array. The static electricity discharging circuit is connected between the auxiliary line and the address and/or data lines. The static electricity discharging circuit comprises a first discharge circuit having a plurality of switching elements connected in series and a second discharge circuit having a plurality of switching elements connected in series.

Semiconductor device comprising a matrix array, and thin-film transistor

An array substrate for a flat-panel display device includes a glass substrate, a display section formed on the glass substrate and having pixel electrodes arrayed in row and column directions, pixel TFTs connected to the pixel electrodes for controlling the potentials thereof, and wiring lines including scan lines and signal lines which are connected to the pixel TFTs and extending to a removable area outside the display section, a short-circuit line formed in the removable area, surge-protection switch circuits formed in the removable area and connected between the short-circuit line and the wiring lines, each for electrically connecting a corresponding one of the wiring lines to the short-circuit line when the potential of the corresponding wiring line exceeds a predetermined level, and test pads formed in the removable area and connected to the wiring lines. Particularly, the test pads and the surge-protection switch circuits are located on one side of the display section in each of the row and column directions, and adjacent ones of the test pads are set apart from a periphery of the glass substrate by different distances.

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Hyogo-ken, Japan

Hisaaki Hayashi