Sensor device and method for grip and proximity detection

Abstract

The present invention provides a sensor device, the sensor device has a first electrode structure and a second electrode structure, the first electrode structure includes a transmitting electrode (SE), a compensation electrode (KE) and a receiving electrode (EE), the described The second electrode structure includes a number of field sensing electrodes (FE). Said first and said second electrode structure are coupled to an evaluation device (A). The evaluation device comprises a signal generator (G) for supplying an alternating electric signal (WS1), WS2) to the transmitting electrode and the compensating electrode. The electrodes are arranged relative to each other in such a way that a first alternating electric field transmitted at the transmit electrode can be coupled into the receive electrode and into at least one of the field sensing electrodes, and at the The second alternating electric field emitted at the compensating electrode (KE) can substantially only be coupled into said receiving electrode (EE). The present invention also provides a method for detecting a user's enclosure of a handheld device.

Description

technical field [0001] The invention relates to a sensor device for detecting the approach and grasp of an object by an electric device. Furthermore, the invention relates to a method for detecting the approach and touch of a person to an electric device. The motorized device can be, for example, a mobile phone, a computer mouse, a remote control, an input member for a game console, a mobile microcomputer (PDA), a headset, a hearing aid, and the like. Background technique [0002] Sensor devices are known from the prior art, which can be arranged at a hand-held device in order to detect the approach of a hand to the hand-held device. For example, it is known to arrange capacitive sensors at hand-held devices in order to obtain an effect based on a change in dielectric properties in the area of ​​the sensor electrodes when the hand approaches the sensor electrodes. [0003] The disadvantage in this respect is that the approach of the hand to the sensor electrodes cannot be ...

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Problems solved by technology

[0003] The disadvantage in this respect is that the approach of the hand to the sensor electrodes cannot be clearly distinguished from the touch of the hand on the sensor electrodes

Furthermore, the disadvantage is that once the hand wraps around the handheld device such that the sensor device detects a change in the dielectric properties at the sensor electrodes, the sensor device may no longer determine whether, for example, a second hand is approaching the handheld device or touching the handheld device. device

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