Capacitive Input Structure for Click Feedback and Multi-Gesture Sensing

The input device is segmented into distinct functional regions: a first region with a first elastic member and first movable electrode for detecting pressing operations, and a second region with a second elastic member and second movable electrode for detecting sliding operations. This segmentation allows each region to be optimized for its specific function, enabling the pressing region to generate click feeling while the sliding region provides accurate manipulation detection without interfering with the click mechanism.

Capacitance serves as an intermediary measurement mechanism that indirectly detects elastic deformation and manipulation forces without requiring direct mechanical contact with the elastic body. The capacitance detection system measures changes in electrical capacity between movable and fixed electrodes, which correspond to elastic deformation, thereby providing accurate detection while preserving the mechanical click feeling in the pressing region.

The elastic members serve multiple functions simultaneously: they provide the mechanical structure for generating click feeling in the pressing region, enable capacitance detection for manipulation recognition, and act as the elastic body for detecting elastic deformation. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while maintaining high manipulation recognition accuracy through capacitance detection.

The patent replaces direct mechanical contact-based detection with capacitance-based detection. Instead of using mechanical sensors that physically interact with the elastic body, the system uses electrical capacitance measurements between movable and fixed electrodes to detect elastic deformation and manipulation forces, thereby improving accuracy while avoiding the complexity of mechanical sensor integration.