EP 3814880 A1 20210505 - CAPACITIVE SENSOR SYSTEM FOR TOUCH DETECTION
Title (en)
CAPACITIVE SENSOR SYSTEM FOR TOUCH DETECTION
Title (de)
KAPAZITIVES SENSORSYSTEM ZUR BERÜHRUNGSERKENNUNG
Title (fr)
CAPTEUR CAPACITIF POUR LA RECONNAISSANCE TACTILE
Publication
Application
Priority
- DE 102018005248 A 20180630
- EP 2019067318 W 20190628
Abstract (en)
[origin: WO2020002594A1] The invention relates to a capacitive sensor system for touch detection, comprising a sensor surface, on which at least one sensor electrode is arranged, and comprising an evaluation device for evaluating an electrical sensor signal of the sensor electrode, which sensor signal can be influenced by the position of a measurement object in a direction in the plane of the sensor surface, wherein: a first and a second sensor electrode border the sensor surface; the first sensor electrode and the second sensor electrode have conductor portions parallel to one another, without touching each other; the second sensor electrode is surrounded by the first sensor electrode; both electrodes are connected to inputs of the evaluation device; and the evaluation device captures sensor signals from the first and second sensor electrodes and determines a ratio variable from the ratio of the difference and the sum of the captured sensor signals and compares said ratio variable with a threshold value.
IPC 8 full level
G06F 3/044 (2006.01); G06F 3/041 (2006.01); H03K 17/96 (2006.01)
CPC (source: EP US)
G06F 3/04186 (2019.04 - EP US); G06F 3/0443 (2019.04 - EP US); G06F 3/0448 (2019.04 - EP); H03K 17/962 (2013.01 - EP); H03K 2017/9602 (2013.01 - EP); H03K 2017/9613 (2013.01 - EP); H03K 2217/960705 (2013.01 - EP)
Citation (search report)
See references of WO 2020002594A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102018005248 A1 20200102; DE 102018005248 B4 20240718; CN 112334868 A 20210205; EP 3814880 A1 20210505; US 11106313 B1 20210831; US 2021255754 A1 20210819; WO 2020002594 A1 20200102
DOCDB simple family (application)
DE 102018005248 A 20180630; CN 201980043801 A 20190628; EP 19734774 A 20190628; EP 2019067318 W 20190628; US 202017120359 A 20201214