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  1. Erweiterte Patentsuche
VeröffentlichungsnummerWO2009102228 A3
Veröffentlichungsdatum8. Okt. 2009
Eingetragen13. Febr. 2009
Prioritätsdatum14. Febr. 2008
Auch veröffentlicht unterWO2009102228A2
VeröffentlichungsnummerPCT/2009/5, PCT/RS/2009/000005, PCT/RS/2009/00005, PCT/RS/9/000005, PCT/RS/9/00005, PCT/RS2009/000005, PCT/RS2009/00005, PCT/RS2009000005, PCT/RS200900005, PCT/RS9/000005, PCT/RS9/00005, PCT/RS9000005, PCT/RS900005, WO 2009/102228 A3, WO 2009102228 A3, WO 2009102228A3, WO-A3-2009102228, WO2009/102228A3, WO2009102228 A3, WO2009102228A3
ErfinderBoban Stojanovic
AntragstellerBoban Stojanovic
Zitat exportierenBiBTeX, EndNote, RefMan
Externe Links:  Patentscope, Espacenet
Planar capacitive proximity sensor
WO 2009102228 A3
Planar capacitive sensor consists of two electrodes, which are in the same plane, and most often, are carried out on a printed circuit board as two surfaces of a conductive material. In case there is no object of detection and since the distance between the electrodes is relatively long, capacitance that is made between the electrodes approximately equals zero. Because the electrodes are extremely thin less than 0.1mm and the area between them relatively large about 1cm, the capacitance which these electrodes make can be considered as 0. When there is no object the surface of the equivalent capacitor is somewhere near 1cm therefore C, proportionally 0.0001 times dialectic air constant plus parasitive capacitor made of two plates in the same plane which have isolator on one side (printed plate), and on the other thin varnish which coats conductor and the air. When the object is near electrodes of size about 1cm or less a capacitor is formed between the first electrode E1 and the object as well as between the object and the second electrode, E2. Total capacity between E1 and E2 is serial connection of these two capacitors. Since the surface between the electrodes and the object is now about 1 cm x 1 cm and the distance is 1 cm, capacity of the equivalent capacitor is proportional to 0.01 times dialectic air constant or some other isolator, in case electrodes are in an isolator. From the picture 1 it is seen that amplification of the capacity is about 100 times.
Zitiertes PatentEingetragen Veröffentlichungsdatum Antragsteller Titel
DE102004026672A1 *28. Mai 200429. Dez. 2005Schott AgContact switch has electrically conducting layer arranged on side remote from user structured in at least one electrically isolated flat region defining at least one capacitive contact or touch sensor electrode
EP0054306A1 *16. Dez. 198123. Juni 1982Bosch-Siemens Hausgeräte GmbHCapacitive touch switch for electrical domestic appliances
GB2157080A * Titel nicht verfügbar
US5867111 *1. Nov. 19962. Febr. 1999Donnelly Technology, Inc.Touch control system
Internationale KlassifikationH03K17/955
Europäische KlassifikationH03K17/955
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