Title:
光学式位置検出装置及び記録媒体
Document Type and Number:
Japanese Patent JP4393030
Kind Code:
B2
Abstract:
The position of a light blocking object is detected not only within a display screen, but also outside the display screen. With the use of the function of detecting the position in a region outside the display screen, it becomes possible to provide virtual buttons in this region and detect dust around a light retro-reflector. Dirt on the light retro-reflector is detected based on the levels of light receiving signals of optical units.
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Inventors:
Yasuhide Iwamoto
Satoshi Sano
Fumihiko Nakazawa
Nobuyasu Yamaguchi
Satoshi Sano
Fumihiko Nakazawa
Nobuyasu Yamaguchi
Application Number:
JP2001576581A
Publication Date:
January 06, 2010
Filing Date:
April 14, 2000
Export Citation:
Assignee:
富士通株式会社
International Classes:
G06F3/041; G01B11/00; G01B11/03; G01B11/14; G01C15/00; G06F3/042; G06M7/00; G09G5/08; G11B7/00; G11B7/085; H01J40/14
Domestic Patent References:
| JP11249799A | ||||
| JP62500889A | ||||
| JP5985580A | ||||
| JP631262U | ||||
| JP11327771A | ||||
| JP991094A | ||||
| JP625428A |
Attorney, Agent or Firm:
Nobuo Kono