Japan Display Inc.

Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Japan Display East Inc.

Panasonic Liquid Crystal Co., Ltd.

Takahiro Nagami

Kenji Anjo

Kenichi Hatakeyama

Osamu Nagashima

Jiro Taniguchi

Toshiro Iwata

A display device includes a display panel having a display region and a peripheral region, the display panel including a TFT substrate, a counter substrate fixed to the TFT substrate by seal material formed at the peripheral region, and liquid crystal interposed between the TFT substrate and the counter substrate. The TFT substrate includes an inorganic film and an organic film, with first column spacers being formed on the counter substrate. The organic film includes a first part which has an island-like shape formed at the peripheral region and a second part formed at the display region, and the seal material covers at least one of the first column spacers and the first part of the organic film, and is in contact with the inorganic film. The first part of the organic film is separated from the second part of the organic film of the organic film.

Liquid crystal display device

In a liquid crystal display device including a TFT substrate and a counter substrate, when an organic passivation film is not formed in the TFT substrate, the distance between the TFT substrate and the counter substrate in the display area of a liquid crystal display panel is provided by a cylindrical spacer. Also, the distance in the area where pixels, scan lines, and image signal lines are not formed within the liquid crystal display panel is provided by the cylindrical spacer. In this case, it is necessary to form a mount. The layer structure of the mount is the same as that of the TFT substrate with which the cylindrical spacer in the display area comes into contact. This makes it possible to equalize the distance of the liquid crystal layer of the liquid crystal display panel without an increase in production cost, and to prevent uneven brightness or color.

Liquid crystal display device and mother substrate

A drain layer lead line connecting an image signal line and a terminal of an IC driver is interrupted in the middle, and the gap is bridged by bridging ITO that is formed at the same time as pixel ITO. Thus, the difference in the length of the lead lines is adjusted such that the length of the bridging ITO in the lead line connected to the terminal in the center of the IC driver is longer than the length of the bridging ITO in the lead line connected to the terminal in the end of the IC driver to reduce the difference in the wiring resistance of the lead lines due to the difference in the length of the lead lines depending on the location.

There is provided a liquid crystal display device that enables increasing the capacitance between a pixel electrode and a common electrode without bringing about a significant decrease in the pixel aperture ratio. An In-Plane Switching LCD device in which a drain signal is supplied from one drain signal line to two pixel columns is configured such that there is a section having no drain signal line between adjacent pixels and a source electrode which is connected to a pixel electrode of a thin-film transistor extends into a contiguous pixel region that does not serve as an effective pixel region to provide one electrode of a capacitive element. A common electrode is formed in each pixel and the one electrode of the capacitive element is laid overlapping the common electrode with an insulation film intervening therebetween.

Liquid crystal display device having large holding capacitance in the pixel

A pixel electrode is formed on a TFT substrate, and a gate insulating film is formed thereon. On the gate insulating film, formed is an inorganic passivation film, on which a common electrode having slits is formed. Through-holes are formed in the gate insulating film at areas where the pixel electrode faces the common electrode, and the pixel electrode is not connected to a source electrode in the through-hole. The through-holes are filled with the inorganic passivation film, and the common electrode is formed on the inorganic passivation film at a position corresponding to each through-hole. The pixel electrode faces the common electrode at the position through not the gate insulating film but only the inorganic passivation film, and thus the pixel capacity can be increased. Accordingly, it is possible to prevent changes in the electric potential of the pixel electrode caused by ON/OFF operations.

A liquid crystal display device having a uniform gap between a TFT substrate and a CF substrate even in cases where a sealant is to be applied to a slim frame formed on the outside of the effective display area is provided. A liquid crystal display device includes an effective display area, a color resist coated area, and a seal area which overlaps the color resist coated area and in which a sealant for sealing liquid crystal is provided, wherein the color resist coated area overlapping the seal area has slits formed therein.

A liquid crystal display device includes a TFT substrate having a display region with first and second electrodes, TFTs, scanning signal lines connected to the TFTs, a counter substrate, a liquid crystal layer sandwiched between the TFT and counter substrates, and sealed by a sealant, scanning line leads connected to the scanning signal lines and formed outside of the display region, video signal line leads connected to the video signal lines and formed outside of the display region and a shield electrode formed on the TFT substrate covering the scanning line leads but not the video signal line leads. The second electrode is connected to one of the TFTs, and liquid crystal molecules of the liquid crystal layer are driven by an electric field, which is generated between the first and second electrodes. The shield electrode is electrically connected to the first electrode and overlapped with the sealant in plan view.

A display device includes a first gate signal line and a second gate signal line, and a first drain signal line, a second drain signal line, and a third drain signal line. A first pixel and a second pixel are surrounded by the first gate signal line, the second gate signal line, the first drain signal line, and the second drain signal line, and a third pixel and a fourth pixel are surrounded by the first gate signal line, the second gate signal line, the second drain signal line, and the third drain signal line. A first storage line and a second storage line are disposed between the first gate signal line and the second gate signal line, and the first pixel includes a first thin film transistor connected to the first gate signal line, the first drain signal line, and a first pixel electrode of the first pixel.

In a display device connected with an IC driver, particularly the reliability of connection between an IC terminal located on the outermost side and the IC driver is improved. IC terminals and flexible wiring board terminals are formed on a terminal region of a TFT substrate. A plurality of the IC terminals are formed at a predetermined pitch. The reliability of an outermost IC terminal is degraded as compared with the reliability of the other IC terminals caused by the loading effect in etching a protection insulating film. In order to prevent this degradation, a dummy terminal is formed on the outer side of the outermost IC terminal, and the loading effect on the outermost IC terminal is made equal to the loading effect on the other IC terminals. Accordingly, degradation in the reliability of the outermost IC terminal is prevented.

Growing community of inventors

Mobara, Japan

Takahiro Nagami