Invention Grant
- Patent Title: Coordinate detecting apparatus, method of detecting coordinate, and electronic information board system
- Patent Title (中): 坐标检测装置，坐标检测方法和电子信息板系统
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Application No.: US14452604Application Date: 2014-08-06
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Publication No.: US09436318B2Publication Date: 2016-09-06
- Inventor: Katsuyuki Omura
- Applicant: Katsuyuki Omura
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: JP2013-171159 20130821
- Main IPC: G06F3/042
- IPC: G06F3/042 ; G06F3/041 ; G06F3/0354 ; G01B11/00
Abstract:
A coordinate detecting apparatus includes a light emitting element that is provided in a peripheral portion surrounding a surface of a display and emits a light in a direction parallel to the surface of the display; a light receiving element that is provided in the peripheral portion surrounding the surface of the display and receives the light emitted from the light emitting element; and a polarization unit that limits an oscillation direction of the light received by a light receiving surface of the light receiving element to a predetermined direction where only a real image is formed on the light receiving surface, wherein a coordinate of a touch position where an indicating unit touches the surface of the display is detected based on a light intensity distribution of the light received by the light receiving element.
Public/Granted literature
- US20150054791A1 COORDINATE DETECTING APPARATUS, METHOD OF DETECTING COORDINATE, AND ELECTRONIC INFORMATION BOARD SYSTEM Public/Granted day:2015-02-26
Information query
