Invention Grant
US08576412B2 Optical position detection device, hand device, and display device with position detection function
有权
光学位置检测装置，手动装置和具有位置检测功能的显示装置
- Patent Title: Optical position detection device, hand device, and display device with position detection function
- Patent Title (中): 光学位置检测装置，手动装置和具有位置检测功能的显示装置
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Application No.: US13765348Application Date: 2013-02-12
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Publication No.: US08576412B2Publication Date: 2013-11-05
- Inventor: Daisuke Nakanishi
- Applicant: Seiko Epson Corporation
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2009-273168 20091201
- Main IPC: G01B11/14
- IPC: G01B11/14
Abstract:
A position detection device includes: a light source adapted to form a light intensity distribution of a detection light beam; a first detector adapted to receive a reflected light beam of the detection light beam reflected by an object in a detection area where the light intensity distribution is formed; a transmissive member disposed between the detection area and the light source, and between the detection area and the first detector, and having a first surface directed toward the detection area and a second surface directed toward the light source; a second detector adapted to receive a light beam reflected by the second surface out of the detection light beam; a position detector adapted to detect the object based on the detection result in the first detector; and a light blocking member disposed between the second detector and the detection area, and adapted to block the reflected light beam.
Public/Granted literature
- US20130155028A1 OPTICAL POSITION DETECTION DEVICE, HAND DEVICE, AND DISPLAY DEVICE WITH POSITION DETECTION FUNCTION Public/Granted day:2013-06-20
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