Japan Display Inc.

Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Kenichi Hatakeyama

Takahiro Nagami

Kenji Anjo

Yuichi Inoue

Masahiro Ohkubo

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.

Liquid crystal display device

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 substrate 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 a TFT, 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 backlight unit for a liquid crystal display device includes a light source element, a light guide plate for guiding the output light from the light source element, and a frame for housing the light guide plate. The light source element is mounted on a flexible wiring substrate fixed to the liquid crystal display panel at one end thereof, together with an electronic component. The light source element and the electronic component are attached to the frame in such a way that each of the light source element and the electronic component is placed in a housing concave portion formed on the back surface side of the frame, by bending the flexible wiring substrate. A case is fixedly attached to the flexible wiring substrate to cover the electronic component. Then, the case is fixed to the inside of the housing concave portion.

A liquid crystal display device includes a TFT substrate having a display region which has first and second electrodes, a plurality of TFTs and a plurality of scanning signal lines connected to the plurality of TFTs, a counter substrate, a liquid crystal layer sandwiched between the TFT and counter substrates, and sealed by a sealant, a plurality of scanning line leads connected to the plurality of scanning signal lines formed in a region outside of the display region, and a shield electrode formed on the TFT substrate covering the plurality of scanning line leads. The second electrode is connected to one of the plurality of 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 mounting unit of a second flexible circuit board is arranged on a rear surface side of a liquid crystal display panel. A portion of a first flexible circuit board at which a connection terminal is formed is bonded to an end portion of a display surface side of the liquid crystal display panel, is pulled out from the end portion of the liquid crystal display panel, is bent and overlapped with the opposite surface to the surface where the light emission components of the mounting unit are mounted with a space, and an external terminal is arranged on the rear surface side. An extended portion is pulled out from the mounting unit, is bent so as to return to the direction of the mounting unit, and is overlapped with the first flexible circuit board on an outer surface of the first flexible circuit board.

An IPS type liquid crystal display device capable of preventing a blanking phenomenon generated to the periphery of a screen caused by charging at the inside of a counter substrate due to the effect of a gate voltage applied to scanning line leads. In a pixel area A constituting a display region, a pixel electrode is disposed by way of an insulative film above a common electrode formed in a planar shape. In a scanning line lead area, the scanning line leads have first scanning line leads and second scanning lines formed in different layers for decreasing the width of the scanning line lead area. The scanning line leads are covered with a shield electrode formed coplanar with the common electrode. Since the shield electrode is extended as far as a portion below a sealant, the shielding effect is enhanced. Further, since the insulative film is present between the sealant and the shield electrode, the sealing effect is not deteriorated.

Growing community of inventors

Mobara, Japan

Kenichi Hatakeyama