SWITCH ACTUATION SYSTEM, MOBILE DEVICE AND METHOD FOR ACTUATING A SWITCH USING A NON-TACTILE PUSH GESTURE

摘要

A switch actuation system (100) comprising: a gesture sensor (1) for actuating a switch (103) using a non-tactile push gesture (115) which is to be executed with a heat-emitting part (114) and is composed of an approach phase (111) in which the part (114) approaches the gesture sensor (1), a waiting phase (113) in which the part (114) remains in the vicinity of the gesture sensor, (1) and a retreat phase (112) in which the part (114) moves away from the gesture sensor (1), the gesture sensor (1) being configured to detect heat emitted by the part (114) during execution of the gesture (115), using at least one pixel (21 to 24) containing a thin film of pyroelectric material, and for each pixel (21 to 24) to emit a signal (51 to 54) with signal excursions (56, 57) that correspond to the temporal variation in the intensity of the heat detected by the pixels (21 to 24); a signal analysis unit (101) by means of which the execution of the gesture (115) can be determined from the temporal sequence of signal excursions (56, 57); and an actuator (104) which is controlled by the signal analysis unit (101) and actuates the switch (103) when the execution of the gesture (115) is detected.