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Patent Searching and Data


Title:
PANEL SWITCH
Document Type and Number:
WIPO Patent Application WO/2001/098883
Kind Code:
A1
Abstract:
A panel switch which can reduce or avoid detection errors caused by disturbing light beans. This panel switch (10) has a side wa11 (54), in which an aperture (56) is formed at an iris part (50), and a side wall (58), in which an aperture (60) is formed. A light beam (Ll) reaches a photodetector (44) through the apertures (56) and (60). Disturbing light beams (LS), whose optical axes are inc11ned from the optical axis of the light beam (Ll), are cut off by the side wa11 (54) and can not reach the photodetector (44). Even if the disturbing light beams (LS) pass through the aperture (56) of the side wa11 (54), they can not pass through the aperture (60), due to inclined optical axes, but go straight through a space (64) to be reflected by the side wall (58) in a direction different from a direction toward the photodetector (44). With this constitution, detection errors, which would be caused by disturbing lights beams (LS) detected by the photodetector (44), can be reduced or avoided.

Inventors:
OKURA YOSHIHIRO (JP)
NAGASAKA CHIKAO (JP)
Application Number:
PCT/JP2001/005249
Publication Date:
December 27, 2001
Filing Date:
June 20, 2001
Export Citation:
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Assignee:
TOKAI RIKA CO LTD (JP)
OKURA YOSHIHIRO (JP)
NAGASAKA CHIKAO (JP)
International Classes:
G06F3/042; G06F3/041; H01H35/00; H01L31/0232; (IPC1-7): G06F3/03; H01H35/00
Foreign References:
JPH08148981A1996-06-07
JPH0580934A1993-04-02
JPS62277589A1987-12-02
JPH10255614A1998-09-25
US4769535A1988-09-06
Attorney, Agent or Firm:
Nakajima, Jun (NAKAJIMA & KATO Seventh Floor HK-Shinjuku Bldg. 3-1, Shinjuku 4-chome Shinjuku-ku Tokyo, JP)
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