Abstract: A keyboard assembly includes a chassis formed with a plurality of cavities, a key unit including a plurality of key modules, and a scanning unit. Each key module is mounted in a respective one of the cavities, and has an individual resonant frequency. The scanning unit emits a detecting signal repeatedly, where a frequency of the detecting signal in each repetition being a different one of a plurality of scanning frequencies. The scanning unit and the key modules are configured such that, for each key module, when the frequency of the detecting signal is one of the scanning frequencies that matches the individual resonant frequency of the key module, the key module reaches electromagnetic resonance and the scanning unit acquires a response signal corresponding to the key module in response to the electromagnetic resonance.

Abstract: A keyboard assembly includes a chassis formed with a plurality of cavities, a key unit including a plurality of key modules, and a scanning unit. Each key module is mounted in a respective one of the cavities, and has an individual resonant frequency. The scanning unit emits a detecting signal repeatedly, where a frequency of the detecting signal in each repetition being a different one of a plurality of scanning frequencies. The scanning unit and the key modules are configured such that, for each key module, when the frequency of the detecting signal is one of the scanning frequencies that matches the individual resonant frequency of the key module, the key module reaches electromagnetic resonance and the scanning unit acquires a response signal corresponding to the key module in response to the electromagnetic resonance.

Abstract: A position indicator includes an output generator and a controller. The output generator generates, based on a control signal, a drive voltage that has a magnitude related to a duty cycle of the control signal, and generates, based on a control input, an output signal that is switchable between the drive voltage and a ground voltage. The controller stores a number (N) of voltage setting values, and obtains a number (N) of target duty cycle values that respectively correspond to the voltage setting values, where N?1. The controller generates the control signal based at least on the target duty cycle values, and generates the control input.

Abstract: A rotational input device is to be operated, and includes a device body, a rotatable unit rotating in response to operation, a sensing unit detecting an amount of rotation of the rotatable unit to generate a detection signal, and a processing unit connected to the sensing unit. After receiving the detection signal, the processing unit calculates an angular acceleration of the rotatable unit based on the detection signal, and determines whether the angular acceleration is greater than a predetermined threshold. In the affirmative, the processing unit divides the amount of rotation by a preset amount of rotation to obtain a first output value, and generates an input signal based on a second output value that is determined based on the first output value.

Abstract: A stylus for a capacitive touch sensor device includes a tip unit, a signal amplification unit and a body unit. The tip unit generates a sensing signal under influence of an electric field. The signal amplification unit is electrically connected to the tip unit and generates an amplified signal by amplifying the sensing signal. The body unit includes a feedback component electrically connected to the signal amplification unit, and an insulation component disposed between the feedback component and the tip unit. The feedback component is made of conducting material and disposed adjacent to the tip unit, so that an electric field resulting from the amplified signal received by the feedback component is fed back to the tip unit.

Abstract: A position indicator includes: a receiving electrode to receive a driving signal from a position detector; an amplifying circuit to amplify the driving signal to generate an amplified signal; an oscillating circuit generating an output signal that oscillates for a time period upon satisfaction of a predetermined threshold condition associated at least with the amplified signal and a predetermined trigger level; and a transmitting electrode to transmit the output signal.

Abstract: An instant messaging and gaming method for use in an electronic device is disclosed to include the step of displaying on an interface a menu bar providing an instant messaging option and a game option and a content screen, the step of receiving an instruction of triggering the game option for enabling the content screen to provide a game content and a game status, and the step of receiving an instruction of triggering the instant messaging option for enabling the content screen to provide an instant messaging content and the game status. Thus, the user can get the latest game status from the content screen without switching the screen when performing an instant messaging.

Abstract: A position detecting method includes: transmitting to a position indicator a first excitation signal that has a variable frequency and then receiving a first response signal therefrom, via a target antenna unit including a target antenna; determining, based on the first response signal, a target frequency of the first excitation signal at which the first response signal has a maximum energy level; continuously transmitting to the position indicator a second excitation signal that has the target frequency and then receiving a second response signal from the position indicator, via a group of antenna units including the target antenna unit individually and successively; and obtaining position information corresponding to the position indicator based on the second response signal.

Abstract: A position detecting method includes: transmitting to a position indicator a first excitation signal that has a variable frequency and then receiving a first response signal therefrom, via a target antenna unit including a target antenna; determining, based on the first response signal, a target frequency of the first excitation signal at which the first response signal has a maximum energy level; continuously transmitting to the position indicator a second excitation signal that has the target frequency and then receiving a second response signal from the position indicator, via a group of antenna units including the target antenna unit individually and successively; and obtaining position information corresponding to the position indicator based on the second response signal.

Abstract: An input device with ghost key suppression includes a switch module, a comparator, an exchange unit, a bias voltage resistor, and a processing module. The switch module includes a plurality of strobe lines, a plurality of sense lines, and a plurality of switch units. Each of the switch units has a switch and a resistor connected in series between a corresponding one of the strobe lines and a corresponding one of the sense lines. The comparator is configured for comparing a signal received at an input end thereof with a reference signal for generating the comparison signal. The exchange unit is electrically connected to the sense lines and the comparator, and is operable in response to a control input for making and breaking electrical connection between each of the sense lines and the input end of the comparator. The processing module controls operation of the switch module and the exchange unit based on the comparison signal.

Abstract: A position detecting device includes: a position indicator operable to resonate at a first frequency, upon receipt of an excitation signal, to oscillate at a second frequency different from the first frequency so as to generate an oscillation signal, and to transmit the oscillation signal thus generated; and a position detector operable to generate the excitation signal and to transmit the excitation signal to the position indicator, and configured to perform band pass filtering and amplitude detection upon the oscillation signal received thereby for generating a processed signal, and to obtain information corresponding to position of the position indicator relative to the position detector based on the processed signal. A frequency range of the band pass filtering includes the second frequency and excludes the first frequency.

Abstract: A dual-mode input device includes a relative coordinate generator disposed in a casing for detecting motion of the casing and for generating relative coordinate information based on detected motion of the casing, and a processing unit. The processing unit includes a coordinate storing module for storing absolute coordinate information, an absolute coordinate generator for generating updated absolute coordinate information based on the relative coordinate information received from the relative coordinate generator and the absolute coordinate information received from the coordinate storing module, and for storing the updated absolute coordinate information in the coordinate storing module, and an output selecting module operable in one of a relative coordinate mode, in which the output selecting module outputs the relative coordinate information, and an absolute coordinate mode, in which the output selecting module outputs the absolute coordinate information.

Abstract: A position indicator is for use with a wireless platform operable to wirelessly transmit an excitation signal and to determine position of the position indicator relative to the wireless platform according to an oscillation signal received by the wireless platform. The position indicator includes: a working unit disposed in a casing unit, and operable to receive the excitation signal via a receiver coil, to generate the oscillation signal from the excitation signal, and to wirelessly transmit the oscillation signal via a transmitter coil; and a trigger unit disposed in the receiving space, and including a core part having first and second sections that correspond respectively in position to the transmitter and receiver coils, the first section of the core part having a varying permeability value, the second section of the core part having a substantially non-varying permeability value.

Abstract: A position detecting device includes: a position indicator operable to resonate at a first frequency, upon receipt of an excitation signal, to oscillate at a second frequency different from the first frequency so as to generate an oscillation signal, and to transmit the oscillation signal thus generated; and a position detector operable to generate the excitation signal and to transmit the excitation signal to the position indicator, and configured to perform band pass filtering and amplitude detection upon the oscillation signal received thereby for generating a processed signal, and to obtain information corresponding to position of the position indicator relative to the position detector based on the processed signal. A frequency range of the band pass filtering includes the second frequency and excludes the first frequency.

Abstract: An input device with ghost key suppression includes a switch module, a comparator, an exchange unit, a bias voltage resistor, and a processing module. The switch module includes a plurality of strobe lines, a plurality of sense lines, and a plurality of switch units. Each of the switch units has a switch and a resistor connected in series between a corresponding one of the strobe lines and a corresponding one of the sense lines. The comparator is configured for comparing a signal received at an input end thereof with a reference signal for generating the comparison signal. The exchange unit is electrically connected to the sense lines and the comparator, and is operable in response to a control input for making and breaking electrical connection between each of the sense lines and the input end of the comparator. The processing module controls operation of the switch module and the exchange unit based on the comparison signal.

Abstract: A computer pointing device is adapted for use with a computer to control position of a cursor on a screen. The computer pointing device includes a casing, a macro key mounted operably on the casing, a storage medium disposed in the casing and storing a macro command, an execution module disposed in the casing, and a transmission interface. The macro command corresponds to the macro key and specifies an instruction set for controlling the cursor to move to a point defined by predetermined absolute coordinates on the screen. The execution module is coupled electrically to the macro key and the storage medium, and is operable to execute the macro command when the macro key is operated so as to generate an output signal corresponding to the macro command. The transmission interface is coupled electrically to the execution module and is operable to transmit the output signal to the computer.

Abstract: A computer input device is adapted for use with a computer, and includes a scroll wheel unit and a processing unit. The scroll wheel unit includes a scroll wheel, and a detecting module for detecting rotation of the scroll wheel. The detecting module generates an output corresponding to speed and direction of rotation of the scroll wheel. The processing unit is coupled electrically to the scroll wheel unit, determines a time difference between two consecutive outputs received from the scroll wheel unit, and determines a value of a scroll speed parameter based on the time difference. The processing unit then generates a scroll control signal corresponding to the value of the scroll speed parameter determined thereby, and provides the scroll control signal to the computer for controlling the computer to scroll screen content on a display according to the scroll control signal.

Abstract: A dual-mode input device includes a relative coordinate generator disposed in a casing for detecting motion of the casing and for generating relative coordinate information based on detected motion of the casing, and a processing unit. The processing unit includes a coordinate storing module for storing absolute coordinate information, an absolute coordinate generator for generating updated absolute coordinate information based on the relative coordinate information received from the relative coordinate generator and the absolute coordinate information received from the coordinate storing module, and for storing the updated absolute coordinate information in the coordinate storing module, and an output selecting module operable in one of a relative coordinate mode, in which the output selecting module outputs the relative coordinate information, and an absolute coordinate mode, in which the output selecting module outputs the absolute coordinate information.

Abstract: In a method and apparatus for detecting the position of a coordinate probe relative to a digitizing tablet, a sensing coil grid provided on a working region of the tablet includes a plurality of sensing coils, each of which is U-shaped and has a front section and a grounded rear section. The coils are arranged in parallel along an axis of the working region in an overlapping manner with the front sections of consecutive ones of the coils being arranged in succession, and with the rear sections of the coils also being arranged in succession.