公开(公告)号：US5070325A

公开(公告)日：1991-12-03

申请号：US324109

申请日：1989-03-16

Applicant: Atsushi Tanaka ,  Kiyoshi Kaneko ,  Yuichiro Yoshimura ,  Noriyuki Suzuki ,  Katsuyuki Kobayashi ,  Shigeki Mori ,  Shinnosuke Taniishi

Inventor： Atsushi Tanaka ,  Kiyoshi Kaneko ,  Yuichiro Yoshimura ,  Noriyuki Suzuki ,  Katsuyuki Kobayashi ,  Shigeki Mori ,  Shinnosuke Taniishi

IPC: G06F3/033 ,  G06F3/043

CPC classification number: G06F3/0433

Abstract: A coordinate input apparatus includes a vibration pen, a vibration transmission plate, a plurality of vibration detecting units, a calculating unit, a memory unit, and a control unit. The calculating unit calculates vibration transmission times from a point designated by the vibration pen to the vibration detecting units, and calculates coordinate values of the designated point of the vibration pen. The memory unit stores the vibration transmission times from a first designated point of the vibration pen on the vibration transmission plate to the vibration detecting units and coordinate values of the first designated point. The control unit performs calculations on the basis of vibration transmission times from a second designated point calculated by the calculating unit to the vibration detecting units, the vibration transmission times from the first designated point and the coordinate values of the first designated point stored in the memory unit, thereby calculating coordinate values of the second designated point.

公开(公告)号：US5019865A

公开(公告)日：1991-05-28

申请号：US449053

申请日：1989-12-18

Applicant: Atsushi Tanaka ,  Kiyoshi Kaneko ,  Yuichiro Yoshimura

Inventor： Atsushi Tanaka ,  Kiyoshi Kaneko ,  Yuichiro Yoshimura

IPC: H04N1/04 ,  G06F3/033 ,  G06F3/041 ,  G06F3/043 ,  G06T1/00

CPC classification number: G06F3/041 ,  G06F3/033 ,  G06F3/0433

Abstract: In an image processing apparatus having a designator for designating an area of a document image and a processor for carrying out a predetermined process to the designated area when the document image is input, the document image area designator has a document table at an image input unit, made of a transparent and vibration-transmitting plate, and a coordinate input device for detecting coordinates of a vibration input point by detecting vibration applied to the document table, by vibration sensors arranged in the document table.

公开(公告)号：US4931965A

公开(公告)日：1990-06-05

申请号：US67546

申请日：1987-06-29

Applicant: Kiyoshi Kaneko ,  Atsushi Tanaka ,  Yuichiro Yoshimura ,  Katsuyuki Kobayashi ,  Shinnosuke Taniishi

Inventor： Kiyoshi Kaneko ,  Atsushi Tanaka ,  Yuichiro Yoshimura ,  Katsuyuki Kobayashi ,  Shinnosuke Taniishi

IPC: G06F3/033 ,  G06F3/043

CPC classification number: G06F3/0433 ,  Y10S367/907

Abstract: A coordinates input apparatus, for example, a digitizer, has a vibration propagation medium such as a transparent glass plate for allowing a vibration to propagate therethrough; an input pen for applying vibration to the vibration propagation medium; a vibration detector for detecting vibration applied by the input pen; an envelope output device for producing an envelope signal representing the envelope of the vibration detected by the vibration detector; a differentiator for conducting a differentiation of the envelope signal produced by the envelope output device so as to determine the peak; a controller adapted for determining, as the time of arrival of the vibration, a zero-cross point of the vibration that is located in the vicinity of a zero-cross point of the signal from the differentiator; and a computing device for computing the distance between the input pen and the vibration detector from the time determined by the controller.