Abstract:
A device includes a substrate is substantially transparent and includes a contact surface and an interface surface. The interface surface includes a plurality of electrical contacts. The device further includes a semiconductor die, which includes a plurality of connections, a first photo detector and a second photo detector. Each of the plurality of connections includes a connection bump formed thereon to couple to the plurality of electrical contacts of the interface surface of the substrate. The plurality of connections positioned relative to the first and second photo detectors to alter a directional response of at least one photo detector of the plurality of photo detectors.
Abstract:
In one form, a keypad includes a substrate and a flexible membrane disposed above a top surface of the substrate. The substrate has the top surface, a first conductor below the top surface, an insulator layer separating the first conductor from the top surface, and a second conductor disposed in proximity to the first conductor and to the top surface and coupled to a voltage terminal. The flexible membrane is disposed above the top surface of the substrate and has a third conductor forming a key. The third conductor is movable relative to the top surface. In another form, a keypad system includes such a keypad and a capacitive sensing circuit coupled to the first conductor for sensing a change in capacitance between the first conductor and the voltage terminal when the third conductor moves relative to the top surface.
Abstract:
An apparatus includes an integrated circuit (IC) configured to sense capacitance, and two or more capacitive elements coupled to the IC. The capacitive elements each have a first section, and one capacitive element has a second section. The first sections of the capacitive elements have the same or substantially the same lengths, shapes, and/or capacitance values.
Abstract:
A touch panel scan system is disclosed for detecting a change in mutual capacitance on the surface of a touch panel. A first touch detect device is provided having a transmitter for transmitting a transmit signal to a select one of a plurality of first lines on a first edge of a touch panel to facilitate a single line scan operation. A second touch detect device is interfaced with a select one or ones of second lines on a second edge of the touch panel having a receiver for receiving therefrom and processing thereof transmit signals coupled thereto from the select one or ones of the first lines to detect changes in a mutual capacitance associated with the select one or ones of the second lines and the first line. At least one of the first or second touch detect devices functions as a master and the other functions as a slave, with the master coupled to the slave and generating a SYNC signal to initiate a single scan operation of a select one of the first lines.
Abstract:
A touch panel scan system is disclosed for detecting a change in mutual capacitance on the surface of a touch panel. A first touch detect device is provided having a transmitter for transmitting a transmit signal to a select one of a plurality of first lines on a first edge of a touch panel to facilitate a single line scan operation. A second touch detect device is interfaced with a select one or ones of second lines on a second edge of the touch panel having a receiver for receiving therefrom and processing thereof transmit signals coupled thereto from the select one or ones of the first lines to detect changes in a mutual capacitance associated with the select one or ones of the second lines and the first line. At least one of the first or second touch detect devices functions as a master and the other functions as a slave, with the master coupled to the slave and generating a SYNC signal to initiate a single scan operation of a select one of the first lines.
Abstract:
In one form, a keypad includes a substrate and a flexible membrane disposed above a top surface of the substrate. The substrate has the top surface, a first conductor below the top surface, an insulator layer separating the first conductor from the top surface, and a second conductor disposed in proximity to the first conductor and to the top surface and coupled to a voltage terminal. The flexible membrane is disposed above the top surface of the substrate and has a third conductor forming a key. The third conductor is movable relative to the top surface. In another form, a keypad system includes such a keypad and a capacitive sensing circuit coupled to the first conductor for sensing a change in capacitance between the first conductor and the voltage terminal when the third conductor moves relative to the top surface.
Abstract:
A device includes a substrate is substantially transparent and includes a contact surface and an interface surface. The interface surface includes a plurality of electrical contacts. The device further includes a semiconductor die, which includes a plurality of connections, a first photo detector and a second photo detector. Each of the plurality of connections includes a connection bump formed thereon to couple to the plurality of electrical contacts of the interface surface of the substrate. The plurality of connections positioned relative to the first and second photo detectors to alter a directional response of at least one photo detector of the plurality of photo detectors.
Abstract:
An apparatus includes an integrated circuit (IC) configured to sense capacitance, and two or more capacitive elements coupled to the IC. The capacitive elements each have a first section, and one capacitive element has a second section. The first sections of the capacitive elements have the same or substantially the same lengths, shapes, and/or capacitance values.