Abstract:
In a data-input device (4) an actuator element (6) that can be manually actuated, and a sensor (9) mechanically coupled to the actuator element (6). The sensor (9) is formed in a body (10) of semiconductor material housing a first sensitive element (11), which detects the actuation of the actuator element (6) and generates electrical control signals. The first sensitive element (11) is a microelectromechanical pressure sensor, formed by: a cavity (24) made within the body (10); a diaphragm (25) made in a surface portion of the body (10) and suspended above the cavity (24); and piezoresistive transducer elements (26) integrated in peripheral surface portions of the diaphragm (25) in order to detect its deformations upon actuation of the actuator element (6).
Abstract:
The invention pertains to an at least partially transparent touch-sensitive switching system comprising at least two electrodes provided with means for applying a voltage thereto and spaced from each other by a layer comprising at least one region that optically changes by applying the voltage, and at least one region comprising a piezoelectric material generating a voltage when applying pressure thereto.
Abstract:
A method of manufacturing a pressure-sensitive electronic key or keyboard by providing a base layer (1;21) having at least one first electrically conductive area (2;241); applying at least one thin layer of a fluid piezoelectric precursor material onto the first electrically conductive area; transforming the thin layer of precursor material into an essentially coherent and uniform solid film (3) of a composite piezoelectric material firmly adhering to the electrically conductive area; forming a second electrically conductive (4;242) area spaced from the first electrically conductive area (2;241) and firmly adhering to the solid composite piezoelectric material (3) which bridges the space between the electrically conductive areas (2,4;241,242) for providing at least one essentially monolithic piezoelectric element which firmly adheres to the base layer (1) and comprises the solid composite piezoelectric material (3) with the first and second electrically conductive areas (2,4;241,242); and polarizing the composite piezoelectric material (3) with respect to the first and electrically conductive areas (2,4;241,242).
Abstract:
Die Erfindung betrifft eine Folientastatur mit einer Mehrzahl von scheibenförmigen Piezo-Elementen (6), die hinter einer mit Tastensymbolen (1a) versehenen Frontplatte (1) zwischen zwei flexiblen Folien (2 und 4) angeordnet sind, die für jedes Piezo-Element (6) mit einer Kontaktfläche (2a bzw. 4a) versehen sind, die durch eine Leiterbahn (2b,4b) zu einem Anschlußstecker der Tastatur geführt ist, sowie mit einer die Folien (2 und 4) und die Frontplatte (1) tragenden starren Trägerplatte (7) zur Aufnahme der durch Druckbelastung der Frontplatte (1) im Bereich der Tastensymbole (1a) auf die Piezo-Elemente (6) ausgeübten Biegekräfte. Um eine preiswerte und auf einfache Weise mit der notwendigen Präzision herstellbare Folientastatur zu schaffen, ist eine der flexiblen Folien (2 bzw. 4) mit die Piezo-Elemente (6) umgebenden Ringen (5) versehen, deren axiale Dicke etwa der Scheibendicke der Piezo-Elemente (6) entspricht.
Abstract:
A method of making an actuator switch is disclosed. One method including: receiving a threshold amount of pressure on a top surface of a flexible film; in response to receiving the threshold amount of pressure, contacting a first electrode with a second electrode; in response to receiving the threshold amount of pressure, generating i) a first capacitive connection between a row electrode and the second electrode and ii) a second capacitive connection between a column electrode and the second electrode; in response to the first electrode contacting the second electrode, generating, by a piezoelectric actuator, haptic feedback; and in response to the generating the first capacitive connection and the second capacitive connection, providing an input detection signal.
Abstract:
In some examples, techniques are provided for quick haptic feedback, without the use of a controller, which is local to individual, non-actuating keys, such as keys of a thin keyboard or keypad. The haptic feedback may be in the form of a simulated “key-click” feedback for an individual key that is pressed by a user such that the finger used to press the key feels the tactile sensation. The haptic feedback mimics the tactile sensation of a mechanical key (e.g., buckling spring, pop-dome key switch) to give a user the perception that they have actuated a mechanically movable key.
Abstract:
Examples provide a piezoelectric energy harvester and a wireless switch including the same. The piezoelectric energy harvester includes a pressure transmission part situated between a pressing plate and a piezoelectric body, so as to transmit a uniform amount of pressure to the piezoelectric body, thereby generating a constant level of energy. In addition, a wireless switch uses energy generated in the piezoelectric energy harvester as its driving power, thereby transmitting radio frequency (RF) communications signals to an external electronic device to control the operation of the electronic device.
Abstract:
In some examples, techniques are provided for quick haptic feedback, without the use of a controller, which is local to individual, non-actuating keys, such as keys of a thin keyboard or keypad. The haptic feedback may be in the form of a simulated “key-click” feedback for an individual key that is pressed by a user such that the finger used to press the key feels the tactile sensation. The haptic feedback mimics the tactile sensation of a mechanical key (e.g., buckling spring, pop-dome key switch) to give a user the perception that they have actuated a mechanically movable key.
Abstract:
In a data-input device an actuator element that can be manually actuated, and a sensor mechanically coupled to the actuator element. The sensor is formed in a body of semiconductor material housing a first sensitive element, which detects the actuation of the actuator element and generates electrical control signals. The first sensitive element is a microelectromechanical pressure sensor, formed by: a cavity made within the body; a diaphragm made in a surface portion of the body and suspended above the cavity; and piezoresistive transducer elements integrated in peripheral surface portions of the diaphragm in order to detect its deformations upon actuation of the actuator element.