Abstract: The present invention provides an analog-digital hybrid architecture, which performs 256 multiplications and additions at a time. The system comprises 256 Processing Elements (PE) (108), which are arranged in a matrix form (16 rows and 16 columns). The digital inputs (110) are converted to analog signal (114) using digital to analog converters (DAC) (102). One PE (108) produces one analog output (115) which is nothing but the multiplication of the analog input (114) and the digital weight input (112). The implementation of PE is done by using i) capacitors and switches and ii) resistor and switches. The outputs from multiple PEs (108) in a column are connected together to produce one analog MAC output (116). In the similar manner, the system produces 16 MAC outputs (118) corresponding to 16 columns. Analog to digital converters (ADC) (104) are used to convert the analog MAC output (116) to digital form (118).

Abstract: An exemplary embodiment of the present invention provides a stylus pen including: a body portion; a conductive tip configured to be exposed from an inside of the body portion to an outside thereof; a ground portion configured to be electrically connected to a user; and a resonant circuit portion in the body portion, electrically connected between the conductive tip and the ground portion, and including one or more resonance circuits that resonate with electrical signals of different frequencies transferred from the conductive tip to output resonance signals of different frequencies.

Abstract: An apparatus and method for display control are described. In one embodiment, the apparatus comprises: a touch screen surface comprising a plurality of transmitters and a plurality of receivers; and a processing system coupled to the touch screen surface to excite all transmitters in the plurality of transmitters or a subset of transmitters in the plurality of transmitters during different scanning periods when scanning the plurality of transmitters to obtain input signals from the touch screen surface, the subset of transmitters being less than all transmitters in the plurality of transmitters.

Abstract: A display device that is to be connected with an information terminal includes: a video reception unit that receives video information about a screen including a cursor from the information terminal; a touch panel that brings up on display the screen based upon the video information received by the video reception unit and detects a touch position specified by a touch operation; and a transmission unit that transmits, to the information terminal, displacement quantity information corresponding to a quantity of displacement from the display position of the cursor to the touch position.

Abstract: A technique for operating a capacitive sensor array is described. The technique includes measuring a first capacitance of a first set of electrodes at a first time, measuring a second capacitance of a second set of electrodes at a second time, and calculating a position of a conductive object based on a relative magnitude of the first capacitance and the second capacitance. The first set and the second set includes at least one electrode in common and at least one electrode that is not in common.

Abstract: The present invention provides a touch control apparatus capable of detecting a tilt angle and an axial direction of a stylus, wherein the stylus includes a first electrode at a tip of the stylus, a second electrode surrounding the first electrode. and a first button; the touch control apparatus comprising: a sensing circuit connected to a touch screen; a signal strength detecting circuit; and a processing module connected to the sensing circuit and the signal strength detection circuit, the processing module being configured for determining the status of the first button based on the modulation sequence; and determining the tilt angle and the axial direction of the stylus based on the electrical signals of a plurality of time periods.

Abstract: A position detecting device includes a sensor having electrodes that receive an alternating current (AC) signal from a capacitive stylus pen that transmits the AC signal. The position detecting device detects a position indicated by the stylus pen on the sensor. The position detecting device also includes: an electrode selection circuit that selects electrodes provided in the sensor for connection to a positive terminal and a negative terminal; a differential amplifier that amplifies and outputs a signal indicating a difference between signals generated at the positive terminal and the negative terminal; a height detector that obtains a height of the stylus pen relative to a sensor surface of the sensor; and a control unit that causes a selection pattern of the electrodes selected for connection to the positive terminal and the negative terminal by the electrode selection circuit to change according to the height obtained by the height detector.

Abstract: In one embodiment, a method includes generating a drive signal configured to drive a plurality of drive electrodes of a touch sensor. The method also includes modifying the drive signal such that each drive electrode is driven by a drive signal having a unique first characteristic. The method further includes receiving a plurality of sense signals from a plurality of sense electrodes of the touch sensor. The method additionally includes determining a location of a touch input relative to the touch sensor based on at least the first characteristic of the plurality of sense signals.

Abstract: A light sensing circuit using an oxide semiconductor transistor, a method of manufacturing the light sensing circuit, and an optical touch panel including the light sensing circuit. Because the light sensing circuit includes only one light sensor transistor and one switch transistor formed on the same substrate, a structure of the light sensing circuit is simplified. Furthermore, because the light sensor transistor and the switch transistor have the same structure, a method of manufacturing the light sensing circuit is also simplified. Also, since an optical touch panel or an image acquisition apparatus using the light sensing circuit uses the light sensing circuit having a simple structure and does not use a capacitor, the optical touch panel or the image acquisition apparatus may be made thinner and larger.

Abstract: An integrated circuit includes a processor configured to receive position data corresponding to positions of objects relative to a touch-sensitive interface. The processor is configured to determine a first index point for the position data and a second index point of previous position data corresponding to previous positions of the objects relative to the touch-sensitive interface. The processor aligns the first and second index points and assigns an index to link the positions of the objects to the previous positions based on distances between the objects in the position data relative to the previous position data.

Abstract: A filtering system, adapted to remove a direct current (DC) component and a high frequency noise component of a touch-sensed signal is provided. The filtering system includes: an analog to digital converter for transforming the touch-sensed signal into a discrete-time input signal; a direct current removing unit for removing direct current components of the discrete-time input signal to obtain a differentiated signal; a de-noise unit for removing noise components of the differentiated signal to obtain a de-noise signal; and a reconstructive unit for processing the de-noise signal to obtain an output signal.

Abstract: The invention, an improved device and method for the pointer system of a digitizer tablet, is to repetitiously emit signals sequentially from a specific set of inductive loop when the position pointed by the wireless pointer device is located within a range formed by this specific set of inductive loop induced most intensively during a locally scanning process. After a transient energy storage of the wireless pointer device, corresponding resonant signals are emitted out and are received sequentially by several sets of inductive loop located on the digitizer tablet in the neighborhood of this specific set of inductive loop and, by these signals, the wireless pointer device's coordinate position on the digitizer tablet is calculated out relatively.

Abstract: A position detector is provided for detecting the relative movement of first and second members which are mounted for relative movement along a measuring path. One of the members comprises a magnetic field generator for generating a magnetic field and the other member comprises first and second conductors which are inductively coupled to said magnetic field generator. The arrangement of the first and second conductors and the magnetic field generator is such that output signals are generated in a first and second receive circuits whose position varies with the relative movement between the two members. In addition to carrying information relating to the relative position between the two members, the signals induced in the receive circuits also comprise information defining the relative orientation of the two movable members, and by suitable processing of the received signals the relative orientation of the two members can also be determined.

Abstract: An improved touchpad and measurement circuitry for enabling input to a computer or other electronic device. The system includes an X electrode, a Y electrode, a common sensing electrode, and a “water” electrode, wherein these four separate electrodes can be implemented in various physical configurations to obtain the desired effects, wherein moisture and water droplets can be identified and compensated for so as not to interfere with the input of data, wherein noise rejection is achieved by using a time aperture filtering method, wherein an improved scanning technique focuses scanning around an identified input object, wherein an adaptive motion filter responds to the speed and acceleration of an object being tracked, and wherein the measurement circuitry has an increased dynamic range enabling the touchpad to operate with greater tolerances to manufacturing variances.

Abstract: An eraser for use on an electronic whiteboard with a protrusion area on the erasing surface forming a convex area on the erasing surface for establishing a positive point of contact with the whiteboard; an electronic whiteboard system including such an eraser, a controller for storing data relating to information written on and erased from the whiteboard data, and a filter for preventing the storage of digital data relating to contacts with the whiteboard not attributable to normal writing or erasing actions.

Abstract: An eraser for use on an electronic whiteboard with a protrusion area on the erasing surface forming a convex area on the erasing surface for establishing a positive point of contact with the whiteboard; an electronic whiteboard system including such an eraser, a controller for storing data relating to information written on and erased from the whiteboard data, and a filter for preventing the storage of digital data relating to contacts with the whiteboard not attributable to normal writing or erasing actions.