Nec Corporation

Nec Lcd Technologies, Ltd.

Tae Miyahara

Michiaki Sakamoto

Hiroaki Tanaka

Hironori Kikkawa

Shinichi Nakata

Susumu Ohi

Hiroshi Kanou

Takasuke Hayase

Satoshi Ihida

Hiroshi Hada

Wakahiko Kaneko

Hirotaka Yamaguchi

Tomoya Hirata

Shigeki Okutani

A method for fabricating an active matrix LCD panel for use in an active matrix LCD device includes the step of forming a passivation layer acting as a channel protection layer for protecting an amorphous silicon active layer, thereby reducing the number of photolithographic steps. A transparent conductive film is used for forming a gate electrode and a pixel electrode before formation of an amorphous silicon film for the TFTs.

Active matrix LCD panel

In order to use an auxiliary wiring formed on one of opposing substrates as a bypass line of one of circuit lines arranged in matrix on the same substrate, which has a broken portion, cross points (A and B) of the auxiliary wiring and the broken circuit line are electrically connected by removing an insulating film between the auxiliary wiring and the circuit line by irradiating these cross points with a laser beam. An electrostatic protective element is provided in each of cross points of the auxiliary wiring and the circuit lines and the auxiliary wiring is connected to a common terminal connected to an opposing electrode formed on the other opposing substrate such that the potential of the auxiliary wiring can be removed.

Liquid crystal display device and method for repairing breakage of circuit lines thereof

A thin film transistor array for improving writing characteristics into a pixel electrode without a decrease in aperture ratio is provided. A source electrode of a thin film transistor for writing and a source electrode of a thin film transistor for preliminary charging are electrically connected to a pixel electrode. A semiconductor pattern of the thin film transistor for preliminary charging is formed so as to cover a region of intersection of a scanning line and a signal line and a part of a region of formation of a gate storage capacitance.

Thin film transistor array for liquid crystal display (LCD) apparatus

The present invention discloses a liquid crystal display device which is arranged by: (A) the first substrate including a plurality of scanning lines and a plurality of signal lines arranged in a matrix form; a common signal line extended in parallel to one of the scanning lines and the signal lines, for applying a reference potential thereto; a pixel electrode; and a thin-film transistor having a source electrode connected to the pixel electrode, a drain electrode connected to the signal line, and a gate electrode connected to the scanning line, the thin-film transistor being formed in an intersection portion between the scanning line and the signal line; (B) the second substrate including a black matrix layer and positioned opposite to the first substrate with sandwiching a liquid crystal layer between the first substrate and the second substrate; and (C) an insulating layer sandwiched between the pixel electrode of the first substrate and the scanning line. While a voltage is applied between the common signal line and the pixel electrode to thereby produce an electric field, a direction of a molecular axis of liquid crystal molecules contained in the liquid crystal layer is rotated within a plane located in parallel to the first substrate so as to perform a liquid crystal display; and further said pixel electrode of the first substrate covers a portion of the scanning lines located in a region other than such a region where the thin-film transistor is formed.

Wide view angle LCD operable in IPS mode which uses a pixel electrode as a shield to prevent disturbances in the electric field of a display pixel portion of the LCD

An active matrix liquid display system where two scanning lines are successively selected within one horizontal scanning period, by which display voltages are written on pixels lined up in a horizontal direction, and the voltage supplied to a signal line when an even number display pixel is selected and the voltage supplied to a signal line when an odd number display pixel is selected are switched according to a gradation voltage generated from a gradation power source. Accordingly, when there is implemented a dot inversion drive in the active matrix liquid display system where there are less number of signal line drive circuits, and when a former stage pixel is subjected to modulation due to interpixel parasitic capacitance, it is possible to equalize an electric voltage of the former stage pixel being modulated as a latter stage pixel is being written with an electric voltage of the latter stage pixel, owing to revision of a gradation voltage of the former stage pixel.

Active-matrix display system with less signal line drive circuits

Growing community of inventors

Tokyo, Japan

Tae Miyahara