Hitachi, Ltd.

Hitachi Displays, Ltd.

Hitachi Device Engineering Co., Ltd.

Other

Japan Display Inc.

Panasonic Liquid Crystal Display Co., Ltd.

Yoshio Oowaki

Masaaki Kitajima

Shinichi Iwasaki

Koji Takahashi

Tatsuo Makishima

Shunsuke Morishita

Tsutomu Furuhashi

Norio Mamba

Youichi Igarashi

Takeshi Harayama

Hiroshi Tabata

A display device includes a display panel, and a flexible printed circuit that is a wiring connected to a terminal on a glass substrate of the display panel, and transmitting an image signal. The display panel includes a master driver circuit element, a slave driver circuit element, and an inter-driver signal line that is a wiring on the glass substrate for conducting a communication between the master driver circuit element and the slave driver circuit element. The flexible printed circuit includes a connection terminal portion that is connected to the terminal on the glass substrate, and an electromagnetic wave blocking portion that extends from the connection terminal portion toward the display area side, and is arranged on the inter-driver signal line, and has a rear surface conductive pattern which is a planer conductive pattern formed on a surface facing the glass substrate.

Display device

To realize an increase in an image quality of a liquid crystal display device having a capacitive touch screen, and an increase in are liability of a contact surface and a connection portion. A capacitive touch screenand a liquid crystal display panelare connected, by the same flexible wiring substrate, on an interior side when the touch screenand the liquid crystal display panelare laid one on top of the other. By so doing, a terminal is protected from an exterior, and an increase in a number of components is suppressed. Also, by installing the capacitive touch screenon a color filter substrateside of the liquid crystal display panel, a reduction of a contrast is prevented. Furthermore, a capacitive touch screen substrateside is made a contact surface for an input. By so doing, a conductive layerof the capacitive touch screenis prevented from tearing due to an abrasion caused by a contact.

Liquid crystal display device

An image line driving circuit has: an n-number of switching elements for sampling a k-number of gradation voltages inputted from outside and then sequentially supplying the gradation voltages to first to (n/k)-th groups of a k-number of image lines; and a shift register circuit for sequentially inputting sampling voltages to first to (n/k)-th groups of a k-number of switching elements to thereby sequentially turn ON the respective groups of a k-number of switching elements. The scanning line driving circuit sequentially supplies selected scanning voltages to an m-number of scanning lines. The image line driving circuit and the scanning line driving circuit are circuits built in a semiconductor chip mounted on the first substrate. A thin-film transistor has a semiconductor layer formed of amorphous silicon. When voltage levels of the k-number of gradation voltages inputted from outside are at 0 to 5V, the selected scanning voltages inputted to the gates of the thin-film transistors are 20V or more.

Liquid crystal display device employing an analog interface to which a gradation voltage is input from outside

According to the invention, information processing equipment using a flexible printed-circuit board which does not lose bendability with repeated opening and closing of a display unit, and which suppresses radiation noise from signal wiring is provided. In the configuration of the invention, a first cover film is formed to cover a wiring layer on a first surface of a base film, and a second cover film is formed to cover a wiring layer on a second surface of the base film. Portions of the second cover film and the underlying wiring layer on the second surface in the loop formation region are discontinuously removed in the inward-bending area of the loop, and the base film is exposed in the removed parts. The wiring layer underneath the remaining second cover film, which is not removed, and the wiring layer on the first surface of the base film are electrically connected via through holes penetrating the base film.

Information processing equipment

A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on the first substrate, and a plurality of thin film transistors formed proximate to a crossing point of the scanning signal lines and video signal lines. A light shielding layer is formed on the second substrate and overlapped with at least one of the thin film transistors and with at least one signal line of the scanning signal lines and the video signal lines in plane view. The light shielding layer has an aperture region which is formed proximate to the at least one thin film transistor and formed within the at least one signal line in plane view.

Even in a liquid crystal display device that has been completed as a product, EMI countermeasures and power saving can be realized according to the use environment of an electronic apparatus in which the liquid crystal display device is to be mounted. A timing converter mounted on an interface printed circuit board of the liquid crystal display device is provided with a display mode selecting terminal. A display mode selecting signal which varies the frequency of a pixel clock signal for an image signal is applied to the display mode selecting terminal from the outside, thereby varying the frequency of the pixel clock signal.

Image display device

To provide an image display device that is capable of preventing a malfunction of a drive circuit, while reducing the size of an outer frame of an image display device and achieving a sufficient EMI countermeasure, the image display device is provided with a drive circuit mounted in a region outside of a display portion on one of the opposing substrates and is connected to signal lines formed in a region of the display portion, wherein a capacitor is formed in the region of the substrate where the drive circuit is mounted.

Display device with capacitor formed in a region of the substrate where the drive circuit is mounted

The present invention realizes a liquid crystal display device and an image display device which prevent the generation of flickering when power is supplied again after the supplying of power is stopped. The liquid crystal display device includes first and second substrates which are arranged to face each other in an opposed manner, a liquid crystal layer which is inserted between the first and second substrates, active elements, scanning signal lines for operating the active elements and pixel electrodes to which video signals are supplied upon operation of the active elements which are all mounted on one substrate, an orientation film which is inserted between the pixel electrodes and the liquid crystal layer, and reference electrodes which are mounted on either one or the other substrate, and the liquid crystal display device performing a display by generating the potential difference between the pixel electrodes and the reference electrode. In such a liquid crystal display device, the charge of the pixel electrodes is rapidly released when the supplying of power to the liquid crystal display device from the outside is stopped.

Growing community of inventors

Mobara, Japan

Yoshio Oowaki