Panasonic Liquid Crystal Display Co., Ltd.

Japan Display Inc.

Hitachi Displays, Ltd.

Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Other

Canon Kabushiki Kaisha

Atsushi Hasegawa

Toshio Miyazawa

Kazutaka Goto

Iwao Takemoto

Toshiki Kaneko

Hideo Tanabe

Hiroko Sehata

Masaru Takabatake

Masahiro Maki

Masashiro Maki

Hiroaki Asuma

Naoki Tokuda

Terunori Saitou

Kozo Yasuda

Takeshi Yonekura

Tetsuya Nagata

Katsumi Matsumoto

Tetsuro Izawa

Genshirou Kawachi

Tatsuhisa Fujii

Kenji Kitajima

A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.

Manufacturing method for liquid crystal display device

A display driving circuit having a shift register is formed on the display panel. The shift register includes a first stage having first and second transistors and a second stage having a third and fourth transistor. A voltage of a control electrode of the first transistor is boosted by a voltage of a first pulse line changing from low to high. In an On state, the second transistor connects the control electrode of the first transistor and a constant voltage line. A voltage of a control electrode of the third transistor is boosted by a voltage of a second pulse line changing from low to high. In an On state, the fourth transistor connects the control electrode of the third transistor and a constant voltage line. The fourth transistor is switched on by a signal from the first stage.

Active matrix display device

A photosensor array includes plural photosensor pixels. Each of the photosensor pixels includes a lower electrode, an amorphous silicon film, an n-type amorphous silicon film, and an upper electrode. The photosensor array includes plural scanning lines connected to the upper electrodes, plural read lines connected to the lower electrodes, a scanning circuit that is connected to the plural scanning lines, and sequentially supplies a selection scanning signal of a first voltage to the respective scanning lines, a first unit that inputs a second voltage higher than the first voltage to the plural read lines in a blanking period of one horizontal scanning period, and thereafter puts the plural read lines into the floating state, and a second unit that outputs a voltage change in each of the read lines within one horizontal scanning period as the sensor output voltage of the photosensor pixel.

Photosensor having upper and lower electrodes with amorphous silicon film and n-type amorphous silicon film therebetween and photosensor array

Growing community of inventors

Togane, Japan

Atsushi Hasegawa