Invention Grant
- Patent Title: Coordinate detection apparatus and method, and computer program
- Patent Title (中): 坐标检测装置和方法以及计算机程序
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Application No.: US12165000Application Date: 2008-06-30
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Publication No.: US07864341B2Publication Date: 2011-01-04
- Inventor: Katsuyuki Kobayashi
- Applicant: Katsuyuki Kobayashi
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2007-191219 20070723
- Main IPC: G01B11/14
- IPC: G01B11/14
Abstract:
A coordinate detection apparatus has a light projecting unit and light receiving unit, detects abnormal light based on the output from the light receiving unit in a state in which the light projecting unit does not project any light, and detects the coordinates of a light-shielded position based on the output from the light receiving unit in a state in which the light projecting unit projects light.
Public/Granted literature
- US20090027694A1 COORDINATE DETECTION APPARATUS AND METHOD, AND COMPUTER PROGRAM Public/Granted day:2009-01-29
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