Sharp Kabushiki Kaisha Corporation

Hidetsugu Kawamori

Yasuhiro Sugita

Jean Mugiraneza

Takenori Maruyama

Kazutoshi Kida

Shinji Yamagishi

Nobuaki Takahashi

Hiroshi Fukushima

Kenshi Tada

Takuma Yamamoto

Yukio Mizuno

A display device includes a display panel displaying an image, a transparent antenna substrate arranged on one surface of the display panel and having transparency, a first conductive film having a mesh shape and arranged on a surface of the transparent antenna substrate opposite to the display panel, and a second conductive film having a mesh shape and arranged on a surface of the transparent antenna substrate facing the display panel. The first conductive film includes an antenna body portion having a thin film pattern and insulated from a surrounding portion by a slit, and the antenna body portion constitutes a transparent antenna performing wireless communication with an external communication device.

Display device and communication system

The purpose of the present invention is to achieve further miniaturization and performance improvement in a pressure detection type touch panel. The touch panel () includes a TP upper side electrode layer () located above the CF substrate (), a TP lower side electrode layer () located below the CF substrate () and above the liquid crystal layer (), and a piezoelectric element layer () located between the TP upper side electrode layer () and the TP lower side electrode layer ().

Touch panel and electronic device

The purpose of the present invention is to achieve further miniaturization and performance improvement in a pressure detection-type touch panel. The touch panel () includes a TP upper side electrode layer () located above a CF substrate (); and a TP lower side electrode layer () located below the CF substrate () and above a liquid crystal layer (); an ITO layer () located above the TFT substrate () and below the liquid crystal layer (); and a piezoelectric element layer () located between the TP lower side electrode layer () and the ITO layer ().

The present invention simultaneously detects a location of an electric conductor and pressure that is applied by the electric conductor. A touch panel () includes a plurality of sensing electrodes () that extend in a first direction for detecting a touch location based on an electrostatic capacitance; and pressure detecting electrodes () each of which extends in the first direction and is provided between adjacent two of the plurality of sensing electrodes (). Each of the pressure detecting electrodes () has a width smaller than that of each of the sensing electrodes () and has resistance that changes in response to applied pressure.

Capacitance type touch panel with built-in pressure sensor

A driving device, which drives a display section that consists of a plurality of liquid crystal display elements that are connected to signal lines and scanning lines and that are disposed in the form of matrix, includes a scanning-line driver, a signal-line driver, and a compensating device. The scanning-line driver is for releasing to the scanning lines a scanning signal for selecting the scanning lines successively. The signal-line drive is for releasing to the signal lines a display signal for displaying images in synchronism with the scanning signal. Finally, the compensating device which, during a compensating period that follows a display period during which display signals corresponding to one picture are transmitted to the signal lines, applies to each liquid crystal display element a compensating voltage or compensating pulses that is capable of cancelling a lowering in an effective value of a driving voltage for the liquid crystal display elements during the display period. With this arrangement, since the lowering of the effective value of the driving voltage is cancelled, it becomes possible to display liquid crystal images in high quality.

Driving device for a liquid crystal display which uses compensating

A liquid crystal display is provided with a dummy-capacity driver for applying dummy capacities to scanning lines, in accordance with the number of on-state display elements and the number of off-state display elements in each scanning line. This arrangement makes it possible to suppress distortions that tend to appear in a waveform of the driving voltage upon inversion of the polarity. Thus, it becomes possible to obtain liquid crystal images of high picture quality with virtually no crosstalk when displaying any pattern.

Growing community of inventors

Sakai, Japan

Hidetsugu Kawamori