EP 1611417 A2 20060104 - PRESENCE DETECTION BY MEANS OF A CAPACITIVE SENSOR
Title (en)
PRESENCE DETECTION BY MEANS OF A CAPACITIVE SENSOR
Title (de)
DETEKTION VON ANWESENHEIT MIT KAPAZITIVEM SENSOR
Title (fr)
DETECTION DE PRESENCE PAR CAPTEUR CAPACITIF
Publication
Application
Priority
- EP 2004050346 W 20040323
- FR 0303976 A 20030327
Abstract (en)
[origin: WO2004085970A2] The invention relates to a presence detector (1) of the capacitive type, comprising at least one detector electrode (3), forming part of a capacitor (5), the capacitance (Cx) of which will vary with the approach of an object or part of the body of a user and a charging unit (9) for the capacitor applying cycles of charge to said capacitor (5). The sensor further comprises means (11) for the measurement of a parameter, the variation of which reflects a variation in the charging current for the capacitor (5) and, connected to said measuring means (11), an extraction unit (13) for said parameter, for determination of a change in the capacitance of the capacitor (5) from the variation in said parameter between the successive cycles of charging the capacitor, following an approach of an object or a part of the body of a user.
IPC 1-7
IPC 8 full level
E05B 65/20 (2006.01); H03K 17/955 (2006.01); H03K 17/96 (2006.01)
CPC (source: EP)
E05B 81/78 (2013.01); H03K 17/955 (2013.01); H03K 17/962 (2013.01)
Citation (search report)
See references of WO 2004085970A2
Citation (examination)
US 5554973 A 19960910 - KAWASHIMA KAZUNORI [JP], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2853058 A1 20041001; FR 2853058 B1 20050513; EP 1611417 A2 20060104; JP 2006524807 A 20061102; JP 4558715 B2 20101006; WO 2004085970 A2 20041007; WO 2004085970 A3 20050811
DOCDB simple family (application)
FR 0303976 A 20030327; EP 04722576 A 20040323; EP 2004050346 W 20040323; JP 2006505482 A 20040323