Title:
PROXIMITY SENSOR DEVICE
Document Type and Number:
Japanese Patent JP2016191568
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent erroneous detection of a body to be detected even if environment light including infrared rays or the like of sunlight is received.SOLUTION: In a proximity sensor device, a detection signal processing part 5 superposes a first variation component 13a of a first environment light signal onto a reference signal 14 in a first detection state to obtain a difference ΔS2 to a detection signal 13 when a second environment light signal is equal to or less than a second threshold, detects proximity or non-proximity of a body 4 to be detected by comparing the difference ΔS2 with a first threshold, generates a third environment light signal obtained by adding a signal 11b with predetermined strength to the first environment light signal when the second environment light signal exceeds the second threshold, superposes a second variation component 11c of a third environment light signal onto a reference signal 12 in a first detection state to obtain a difference ΔS3 to a detection signal 11, and compares the difference ΔS3 with the first threshold to detect proximity or non-proximity of a body 4 to be detected.SELECTED DRAWING: Figure 1
Inventors:
HARA MASAHITO
SATO AKINORI
MATSUMOTO SHIGETO
SATO AKINORI
MATSUMOTO SHIGETO
Application Number:
JP2015070437A
Publication Date:
November 10, 2016
Filing Date:
March 30, 2015
Export Citation:
Assignee:
KYOCERA DISPLAY CORP
International Classes:
G01V8/12; H03K17/78; H03K17/945
Domestic Patent References:
| JP2013213680A | 2013-10-17 | |||
| JP2006053069A | 2006-02-23 | |||
| JP2008300201A | 2008-12-11 | |||
| JP2014116710A | 2014-06-26 | |||
| JP2012257129A | 2012-12-27 | |||
| JPS62124487A | 1987-06-05 |
Foreign References:
| US20120162636A1 | 2012-06-28 |