1
Hitoshi Nohno, Masayuki Katagiri, Kiyohiro Nozaki, Kengo Takahama, Hiroyuki Iwahashi: Coordinate input device and display-integrated type coordinate input device capable of directly detecting electrostatic coupling capacitance with high accuracy. Sharp Kabushiki Kaisha, May 29, 2001: US06239788 (190 worldwide citation)

In a coordinate detection period, a first electrode drive circuit sequentially selects source electrodes Sn of the TFT LCD panel to connect the same to an x-signal current amplifying circuit, and to apply an AC voltage to the non-selected electrodes. The x-signal current amplifying circuit detects a ...


2
Yasuhiro Yoshida, Kengo Takahama, Takao Tagawa: Coordinate detection device capable of detecting coordinates using display panel provided specially for display. Sharp Kabushiki Kaisha, David G Conlin, William J Daley Jr, December 29, 1998: US05854881 (86 worldwide citation)

Provided is a coordinate detection device capable of preventing the increase of development cost and the reduction of yield and dispensing with additional investment for the existing equipment. There are provided an LCD panel having electrodes and electrodes, a magnetic field generator which outputs ...


3
Kengo Takahama, Hitoshi Nohno: Coordinate input device. Sharp Kabushiki Kaisha, May 18, 1999: US05905489 (69 worldwide citation)

An M-sequence signal is generated in an M-sequence generation circuit, and the M-sequence signal, which is successively delayed by a column-electrode driving circuit or a row-electrode driving circuit, is applied to a column-electrode group or a row-electrode group. A correlator finds a correlation ...


4
Keisuke Iwasaki, Kengo Takahama: Image processing apparatus for combining differently corrected images. Sharp Kabushiki Kaisha, Nixon & Vanderhye, November 21, 1995: US05469274 (45 worldwide citation)

An image processing apparatus comprises an image storing device and an image inputting device, in which a parameter determining circuit compares an image input through the image inputting device with an image stored in the image storing device to calculate parameters for correction and in which the ...


5
Kengo Takahama, Yasukuni Yamane: Method and apparatus for controlling television image processing based upon television program detection. Sharp Kabushiki Kaisha, Nixon & Vanderhye, October 12, 1993: US05253061 (25 worldwide citation)

A television image processing apparatus has a memory for storing television signals with respect to a predetermined frame image. The apparatus also has an arithmetic correlation circuit for calculating correlation quantity between television signals of each frame image applied thereto in real time a ...


6
Takao Tagawa, Kengo Takahama, Kazunari Okamura, Noritoshi Kako: Display-integrated type tablet device. Sharp Kabushiki Kaisha, David G Conlin, Kevin J Fournier, April 25, 1995: US05410329 (23 worldwide citation)

A detection and hold circuit outputs a reference signal having a level proportional to an x-coordinate detection pulse input from an X-coordinate signal amplifier. A delay element delays the reference signal. An adder adds the x-coordinate detection pulse from the X-coordinate signal amplifier and a ...


7
Kengo Takahama, Takao Tagawa, Kiyohiro Nozaki: Display-integrated type tablet device. Sharp Kabushiki Kaisha, Birch Stewart Kolasch & Birch, October 20, 1998: US05825345 (23 worldwide citation)

During a display period (Y-coordinate detection period), an image is written to an electro-optical material so as to form a display by driving row electrodes and column electrodes by using a row-electrode driving circuit and a column-electrode driving circuit so as to selectively operate TFTs. In th ...


8
Yasuhiro Yoshida, Kengo Takahama, Takao Tagawa: Coordinate detection device capable of obviating the need of forming closed loop in electrodes thereof. Sharp Kabushiki Kaisha, David G Conlin, Brian L Michaelis, August 25, 1998: US05798756 (18 worldwide citation)

There is provided a coordinate detection device capable of preventing increase of development cost and reduction of yield and dispensing with additional investment for existing equipment. The coordinate detection device includes an LCD panel having electrodes and electrodes, an electric field genera ...


9
Takao Tagawa, Kengo Takahama, Kazunari Okamura, Noritoshi Kako: Display-integrated type tablet device. Sharp Kabushiki Kaisha, David G Conlin, William J Daley Jr, May 20, 1997: US05631666 (14 worldwide citation)

A detection and hold circuit outputs a reference signal having a level proportional to an x-coordinate detection pulse input from an X-coordinate signal amplifier. A delay element delays the reference signal. An adder adds the x-coordinate detection pulse from the X-coordinate signal amplifier and a ...


10
Masayuki Katagiri, Kengo Takahama, Noritoshi Kako: Image process apparatus with hologram lenses arranged in a concentric form or a spiral form. Sharp Kabushiki Kaisha, Nixon & Vanderhye, May 3, 1994: US05309244 (11 worldwide citation)

An image processing apparatus is provided to have a spatial light modulator onto and from which an image data is written and read, a digital reading system for digitally reading an image data written on the spatial light modulator, a processing unit for processing the read image data, and a digital ...