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Channel waveguide system for sensing touch and/or gesture

Tue, 26 May 2015 08:00:00 EDT

This disclosure relates to a channel waveguide, at least a portion of which is disposed within a viewing area of an interactive display, proximate to and substantially parallel to a user interface surface of the interactive display. A source of a first electromagnetic or acoustic signal is input to the channel waveguide. At least one detector is configured to receive, from the channel waveguide, a second signal corresponding to the first signal and to output a third signal indicative of a position of an object proximate to the channel waveguide.



Driving electrodes with different phase signals

Tue, 26 May 2015 08:00:00 EDT

A controller includes drive circuitry to drive one target drive electrode of a touch sensitive device with a series of predetermined phase pulses and to drive at least one other drive electrode of the touch sensitive device with a corresponding series of out-of-phase pulses. Sense circuitry receives signal transferred to sense electrodes from the drive electrodes of the touch sensitive device. The received signal is responsive to one or more touches on the touch sensitive device.



Touch sensitive device

Tue, 26 May 2015 08:00:00 EDT

A touch sensitive device comprising a panel capable of supporting bending waves, a user-accessible touch sensitive screen on or forming part of a face of the panel, the touch sensitive screen having a plurality of different sensing areas, a plurality of vibration exciters coupled to the panel to apply bending waves to the panel to provide tactile feedback at the plurality of sensing areas in response to the user touching a sensing area, and signal processing means arranged to apply signals to the vibration exciters so as to steer bending waves applied to the panel by the plurality of vibration exciters whereby the amplitude of the applied bending waves is maximized at the sensing area touched by the user and reduced or minimized at each other sensing area.



Cover for an electronic device

Tue, 26 May 2015 08:00:00 EDT

A cover configured to overlie a touch screen of an electronic device the cover including an output portion configured to enable content presented on the touch screen to be visible to a user through the cover; and the cover including a plurality of distinct input portions each sharing a physical characteristic that demarcates each of the plurality of distinct input portions as an input portion, wherein each of the plurality of distinct input portions is configured to enable one of a plurality of touch sensitive areas of the touch screen to be actuated.



System and method for diagnostics of a grid based digitizer

Tue, 26 May 2015 08:00:00 EDT

A method for testing a digitizer to determine an operative property of the digitizer, wherein the digitizer includes a sensor grid, comprises providing an input signal on a first portion of the sensor grid, detecting at least one output signal in a second portion of the sensor grid responsive to the input signal in the first portion, and determining at least one operative property of the sensor based on the at least one output signal, wherein at least the transmitting, detecting and determining is performed autonomously by the digitizer.



Input device with force sensing

Tue, 26 May 2015 08:00:00 EDT

Devices and methods are provided that facilitate improved input device performance. The devices and methods utilize a first substrate with proximity sensor electrodes and at least a first force sensor electrode disposed on the first substrate. A second substrate is physically coupled to the first substrate, where the second substrate comprises a spring feature and an electrode component. The electrode component at least partially overlaps the first force sensor electrode to define a variable capacitance between the first force sensor electrode and the electrode component. The spring feature is configured to facilitate deflection of the electrode component relative to the first force sensor electrode to change the variable capacitance. A measure of the variable capacitance may be calculated and used to determine force information regarding the force biasing the input device.



Automotive user interface for a ventilation system of a motor vehicle

Tue, 19 May 2015 08:00:00 EDT

An automotive user interface for controlling the temperature, the distribution and of the air flow rate in a ventilation system of a motor vehicle. The automotive user interface comprises: a touch-sensitive control display unit, which comprises light-emitter diodes structured for providing a visual representation of temperatures that can be set by a user according to a generally circular arrangement; an optically semitransparent touch-sensitive control panel superimposed on the light-emitter diodes in a position corresponding to an area for setting the temperature; and an electronic control unit connected to the light-emitter diodes and to the control panel for controlling the temperature of the air in the ventilation system and the light-emitter-diode means in response to an action of touch contact by a user on the area for setting the temperature.



Image forming apparatus storing a stylus pen

Tue, 19 May 2015 08:00:00 EDT

Disclosed is an image forming apparatus provided with an operation panel receiving instructions from a user by touch operations, a stylus pen used to perform the touch operations, and a pen holder holding the stylus pen, the pen holder including an opening for insertion of the stylus pen from outside of the pen holder, and a storage section storing the stylus pen. The storage section includes a first hollow portion with a first bottom and a second hollow portion with a second bottom lower than the first bottom. The stylus pen is stored in the storage section by being inserted through the opening, proceeding along the first bottom to enter the second hollow portion, and slanting, upon a center of gravity of the stylus pen passing a boundary between the first bottom and the second bottom, so that a tip of the stylus pen points downwards.



Multipoint touchscreen

Tue, 19 May 2015 08:00:00 EDT

A touch panel having a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at the same time and at distinct locations in the plane of the touch panel and to produce distinct signals representative of the location of the touches on the plane of the touch panel for each of the multiple touches is disclosed.



Systems and methods for piezo-based haptic feedback

Tue, 19 May 2015 08:00:00 EDT

Systems and methods for piezo-based haptic feedback are disclosed. For example, one described apparatus for piezo-based haptic feedback includes a polymer matrix, and a piezoelectric actuator at least partially embedded within the polymer matrix, the piezoelectric actuator configured to output a haptic effect.



Multi-point touch-sensitive sensor user interface using distinct digit identification

Tue, 19 May 2015 08:00:00 EDT

For digit identification on a multi-point touch sensitive sensor, an assignment module assigns a digit identity to each digit of at least two digits in contact with a multi-point touch sensitive sensor during a learning phase. The digit identity includes a distinct representation of each digit. A receiving module detects a digit interaction of one or more particular digits of the at least two digits with the multi-point touch-sensitive sensor. A determination module recognizes the assigned digit identity for each particular digit involved in the digit interaction.



System and apparatus for a multi-point touch-sensitive sensor user interface using distinct digit identification

Tue, 19 May 2015 08:00:00 EDT

A computer program product for a multi-point touch-sensitive sensor user interface using distinct digit identification. The computer program product may include a relationship module, an assignment module, a receiving module, a determination module, and an initiation module. The relationship module may determine a relationship between at least two digits. The assignment module may assign a distinct digit identity to each digit of the at least two digits. The receiving module may receive a digit event comprising at least one digit interaction. The determination module may determine a digit identity for each digit involved in the digit event and a digit interaction associated with each digit of the digit event. Finally, the initiation module may initiate a digit event function associated with the determined digit identity and the digit interaction. Therefore, a user has greater control over a device through the interface with each digit having a distinct function and identity.



Input detecting apparatus, and associated method, for electronic device

Tue, 19 May 2015 08:00:00 EDT

An apparatus, and an associated method, forms a user interface permitting input of input instructions to an electronic device. Input commands are evidence by tactile input forces applied to a force receiving surface. Force sensing elements are positioned to sense indications of the tactile input force. The force sensing element is caused to exhibit a selected input parameter value through application of a selected force thereto by application of a tightening torque to a fastener positioned in proximity to the force sensing element.



Touch detecting function display apparatus, driving circuit, driving method of touch detecting function display apparatus and electronic equipment

Tue, 19 May 2015 08:00:00 EDT

A touch detecting function display apparatus includes a plurality of common driving electrodes, a display element performing display, a touch detection element detecting an external approaching object, and a scanning driving unit performing first scanning driving for sequentially applying a display driving signal to the plurality of common driving electrodes in a time division manner and second scanning driving for sequentially applying a touch detection driving signal to the plurality of common driving electrodes in a time division manner, wherein the scanning driving unit performs the second scanning driving at a scanning speed higher than that of the first scanning driving, and applies the display driving signal to an overlapping common driving electrode when the common driving electrode selected as a target of the first scanning driving overlaps with the common driving electrode selected as a target of the second scanning driving.



Simultaneous display of multiple maximized applications on touch screen electronic devices

Tue, 12 May 2015 08:00:00 EDT

The present disclosure provides for a touch screen electronic device to display two or more running applications simultaneously in a side-by-side layout in a split screen mode of the device. Two or more applications that are running on an operating system of the device can be easily displayed simultaneously in the split screen mode while maintaining one of the displayed applications as active so that the user can provide user inputs to the active application.



Surface acoustic wave touch panel and manufacturing method thereof

Tue, 12 May 2015 08:00:00 EDT

A surface acoustic wave touch panel includes a flexible substrate, an acoustic wave transmitting layer, an adhering layer, a piezoelectricity layer, and an electrode layer. The acoustic wave transmitting layer is made of nano-diamond and formed on the flexible substrate. The adhering layer is formed on the acoustic wave transmitting layer. The piezoelectricity layer is formed on the acoustic wave transmitting layer in an interdigitated electrode pattern. The electrode layer is formed on the piezoelectricity layer. A method of manufacturing the surface acoustic wave touch panel is also provided.



Placement of optical sensor on wearable electronic device

Tue, 12 May 2015 08:00:00 EDT

In one embodiment, a wearable device includes a body that includes a touch-sensitive display. The wearable device includes a band coupled to the body and an optical sensor placed on or in the band so that an image of an object displayed on the touch-sensitive display is viewable while the object is also viewable without the wearable device blocking a view of the object.



Touch panel system and electronic device

Tue, 12 May 2015 08:00:00 EDT

Provided is a touch panel system (1) capable of reliably removing a wide variety of noises. The touch panel system (1) includes a main sensor (31) which detects a touch operation, a sub sensor (32) which does not detect a touch operation but detects a noise component, and a subtracting section (41) which subtracts, from an output signal of the main sensor (31), an output signal of the sub sensor (32). The subtracting section (41) performs a subtracting operation to remove a noise component from the output signal of the main sensor (31), thereby extracting a signal derived from the touch operation itself.



Operation instructing device, image forming apparatus including the same and operation instructing method

Tue, 12 May 2015 08:00:00 EDT

An operation instructing device includes a display unit that displays an image and a detecting unit that detects a touched position and thereby specifies a corresponding position of an image displayed on the display unit. While an image is displayed on the display unit, if the detecting unit detects that at least two points A and B are touched in a portion of the detecting unit corresponding to the image, assuming that the image is formed on a sheet of recording paper, a distance between two points of the image formed on the sheet of recording paper corresponding to the two touched points is calculated and displayed on a display panel. Thus, an error in operation instruction such as enlargement and reduction can be reduced, and hence, wasteful consumption of ink and recording paper can be reduced.



Method of transmitting and receiving data and display device using the same

Tue, 12 May 2015 08:00:00 EDT

A method of transmitting and receiving data between a mobile terminal and a display device is provided. The method establishes network connection for communication with the mobile terminal, detects a touch location of the mobile terminal when the mobile terminal touches the display device, designates a first region corresponding to the touch location to the mobile terminal when the touch of the mobile terminal is ended, and transmits data corresponding to an object to the mobile terminal when the object displayed on a screen moves to the designated first region.



Touchscreen controller with adjustable parameters

Tue, 12 May 2015 08:00:00 EDT

Systems, devices, and methods for adjusting characteristics of a touch sensing device in the presence of a wireless power field are disclosed. According to one aspect, the presence of a wireless power field may be detected, and a characteristic of a touch sensing device may be adjusted to reduce interference of the wireless power field with the touch sensing device.



Method, a device and a system for interacting with the touch-sensitive electronic display of a computer

Tue, 12 May 2015 08:00:00 EDT

A method, system and an interactive device for interaction with the electric field of touch-sensitive electronic display of a computing device is provided. The interactive device includes a housing for positioning on the top of the touch-sensitive electronic display, a first electrode determines the touch position, an energy harvester for receiving the electrical energy and transforming the received electrical energy into a DC voltage, a controller generates a serial identification number for identifying the housing through the touch-sensitive electronic display of the computer, an electronic switch transmitting the serial identification number, a second electrode forms a close electrical circuit from the electric field generated by the touch-sensitive electronic display to operate the energy harvester, the controller and the electronic switch; and a third electrode for receiving the serial identification number and the processor of the computer determines the distance and angle in between the first electrode and the third electrode.



Wireless transmission method for touch pen with wireless storage and forwarding capability and system thereof

Tue, 12 May 2015 08:00:00 EDT

The invention provides a wireless transmission method for a touch pen with wireless storage and forwarding capability. The wireless transmission method comprises the touch pen wireless receiving at least a record extracted from a displaying data area by a touch device when the touch pen touches to select the data display region shown on a touch screen of the touch device, and the touch pen storing the record. Accordingly, the touch pen can receive data from the touch device according to touch-control of the user.



Light emitting diode display panel

Tue, 05 May 2015 08:00:00 EDT

A light emitting diode display panel includes a control circuit and a plurality of pixels arranged in a matrix. Each of the pixels includes a first light source and a first light sensing element. The first light sensing element receives a first optical signal from a lighting pen and generates a first control signal to the control circuit. According to the first control signal, the control circuit turns on the first light source in the pixel. The pixels further comprise a first polarizer covering the first light sensing element. When the lighting pen emits the first optical signal, a polarization direction of the light from the lighting pen is parallel to a polarization direction of the first polarizer. Therefore, the first optical signal can pass through the first polarizer and be received by the first light sensing element.



Touch sensing device and driving method thereof

Tue, 05 May 2015 08:00:00 EDT

A touch sensing device and a driving method thereof are provided. The driving method comprises short-circuiting touch sensors by connecting sensor lines to supply a common voltage to the sensor lines through one end and the other end of the sensor lines during a display driving period.



Sensing

Tue, 05 May 2015 08:00:00 EDT

An apparatus including a capacitance touch sensor arrangement configured to have a variable capacitance that varies when a user finger touches the capacitance touch sensor arrangement; and at least one variable resistor sensor integrated within the capacitance touch sensor arrangement wherein the variable resistor sensor has a variable resistance that varies with a sensed parameter; the apparatus including an input configured to receive an input signal including a time varying component and an output configured to provide an output signal that depends upon both the capacitance of the capacitance touch sensor arrangement and the resistance of the variable resistance sensor.



Touch pad operable with multi-objects and method of operating same

Tue, 05 May 2015 08:00:00 EDT

The present invention provides a touch pad operable with multi-objects and a method of operating such a touch pad. The touch pad includes a touch structure for sensing touch points of a first and a second object and a controller for generating corresponding touching signals and related position coordinates. Moreover, the controller calculates at least two movement amount indexes according to coordinate differences between these position coordinates, thereby generating a movement amount control signal to control behaviors of a software object.



Single substrate touch sensor

Tue, 05 May 2015 08:00:00 EDT

The embodiments described herein are related to capacitive input device, including a substrate, a plurality of first sensor electrodes deposited on the substrate and arranged in a first direction, an insulating layer, a plurality of connecting elements deposited on the insulating layer, a plurality of second sensor electrodes. The plurality of second sensor electrodes includes a plurality of sensor electrode elements deposited on the substrate ohmically isolated from the plurality of first sensor electrodes. Each of the plurality of sensor electrode elements are connected to at least one other sensor electrode element arranged in a second direction by one of the plurality of connecting elements. The capacitive input device may further include a plurality of routing elements deposited on the insulating layer, wherein each of the plurality of routing elements coupled to one of the plurality of second sensor electrodes and is substantially disposed in the first direction.



Comparison of an applied gesture on a touch screen of a mobile device with a remotely stored security gesture

Tue, 05 May 2015 08:00:00 EDT

A method of a mobile device comparing an applied gesture on a touch screen of a mobile device with a remotely stored security gesture is disclosed. In one embodiment, a method of a mobile device includes determining that an applied gesture on a touch screen of a mobile device in a locked state is associated with a user-defined gesture, comparing the applied gesture on the touch screen of the mobile device with a designated security gesture stored in a remote computer server, and unlocking the mobile device when the applied gesture on the touch screen of the mobile device in a dormant state matches the designated security gesture stored in the remote computer server.



Information presenting device, tactile sense presenting method, and program

Tue, 05 May 2015 08:00:00 EDT

An information presenting device of present invention includes a conductive layer to which an AC voltage is applied, an insulating layer for covering the conductive layer and presenting a tactile sense when a part of a body of a user set to a ground potential is in contact with the insulating layer.



Operation console enabling appropriate selection of operational mode by the user, electronic device and image processing apparatus provided with the operation console, and method of displaying information on the operation console

Tue, 05 May 2015 08:00:00 EDT

In order to enable appropriate selection of one operational mode from a plurality of operational modes by the user, on a home screen image allowing selection of an operational mode of an image forming apparatus, displayed are: an icon for selecting a copy mode related to image formation at the center; an icon for selecting a FAX mode with priority as a frequently selected mode related to image transmission; and icons allowing direct selection of other operational modes related to image transmission. On a condition setting screen image of a mode related to image transmission, a software button or buttons allowing transition to another mode related to image transmission are displayed.



Touch screen panel

Tue, 05 May 2015 08:00:00 EDT

A touch screen panel is provided. The touch screen panel includes an Indium Tin Oxide (ITO) sensor glass layer, a window glass layer mounted above the ITO sensor glass layer by means of an Optical Clear Adhesive (OCA), a conductive layer disposed between a surface of the window glass layer and a surface of the ITO sensor glass layer that includes an electrode pattern, and a touch screen control unit mounted on one of the window glass layer surface and the ITO sensor glass layer surface on which the conductive layer is mounted.



Multi-function tablet pen input device

Tue, 28 Apr 2015 08:00:00 EDT

This invention relates to the field of remotely controlling the mobile computing device. It further relates to an apparatus and method of at least replicating in a portable pen-like device the ability to control a portable computing device to the same extent as the level of control attainable by a standard PC keyboard when attached to a standard PC; and relates to various embodiments of the apparatus and method.



Creative design systems and methods

Tue, 28 Apr 2015 08:00:00 EDT

Creative design systems and methods are disclosed. In one embodiment, a creative design system is provided. The creative design system comprises a high resolution display, an interactive stylus that includes a transmitter at a tip of the interactive stylus that transmits an encoded signal associated with the interactive stylus and a plurality of sensors that track movement of the interactive stylus over the high resolution display by capturing and decoding the transmitted encoded signal as the stylus moves over the high resolution display. A creative design controller is configured to display sketches of context in response to the tracking of the movement of the interactive stylus over the high resolution display.



Object-sensing device

Tue, 28 Apr 2015 08:00:00 EDT

An object-sensing device is presented. The device includes a waveguide and a substrate holding a liquid crystal layer, wherein radiation propagates through the waveguide via total internal reflection. A radiation emitting element is positioned along a radiation input surface of the waveguide, and a radiation receiving element is positioned to receive radiation exiting the waveguide. The radiation receiving element may be positioned across the waveguide from the radiation emitting element. Alternatively, the radiation receiving element may be positioned on a surface that contacts the radiation input surface of the waveguide that is optically coupled to the radiation emitting element.



Projected capacitive touch panel and method of manufacturing the same

Tue, 28 Apr 2015 08:00:00 EDT

A projected capacitive touch panel has a glass cover, a touch sensing circuit layer, an insulating ink Layer, a conductive wire layer, an insulator layer, a conductive glue layer and a flexible printed circuit (FPC) board. The touch sensing circuit layer, the insulating ink layer the conductive wire layer, the insulator layer and the conductive glue layer are mounted on a circuit surface of the glass cover in sequence. The insulating ink layer cover the touch sensing circuit layer and has multiple through slots. Each through slot is filled with an electric conductor. The FPC is fastened on the conductive wire layer by a conductive glue layer.



Touch screen panel

Tue, 28 Apr 2015 08:00:00 EDT

A touch screen panel includes a substrate having first and second surfaces opposite to each other, a plurality of first sensing electrodes formed on the first surface of the substrate and connected in a first direction, a plurality of second sensing electrodes arranged between the first sensing electrodes and connected in a second direction intersecting the first direction, first connecting patterns connecting the first sensing electrodes in the first direction, a plurality of third sensing electrodes formed on the second surface of the substrate and overlapping the first sensing electrodes, a plurality of fourth sensing electrodes arranged between the third sensing electrodes and overlapping the second sensing electrodes, and second connecting patterns connecting the fourth sensing electrodes in the second direction. The sensing electrodes of the first surface and the sensing electrodes of the second surface overlap each other and are electrically connected to each other through vertical connecting units.



Capacitive touchscreen system with reduced power consumption using modal focused scanning

Tue, 28 Apr 2015 08:00:00 EDT

Disclosed herein are various embodiments of a capacitive touchscreen system that is capable of sensing finger touches made on a capacitive touchscreen according to various scanning modes that reduce power consumption of the capacitive touchscreen system. The disclosed power saving scanning modes are modally focused, and can be used not only to reduce system power consumption, but also to enhance the user experience with the capacitive touchscreen system.



Sample and hold capacitance to digital converter

Tue, 28 Apr 2015 08:00:00 EDT

A circuit for converting charge measured from a touch screen into a digital signal can include a sample and hold circuit. The sample and hold circuit can sample and integrate a charge from a capacitive sense matrix, and hold a voltage signal representing the measured charge. A sigma delta converter can convert the voltage into a digital value.



Capacitance scanning proximity detection

Tue, 28 Apr 2015 08:00:00 EDT

A method and apparatus for scanning a first set of electrodes of a capacitive sense array using a first sensing mode to identify a presence of an object in proximity to the capacitive sense array, where scanning using the first sensing mode identifies objects not in physical contact with the capacitive sense array. The first set of electrodes is scanned using a second sensing mode to determine a location of the object in relation to the capacitive sense array, where rescanning using the second sensing mode determines locations of objects in physical contact with the capacitive sense array.



Touch screen panel

Tue, 28 Apr 2015 08:00:00 EDT

Touch screen panels are provided. The touch screen panel may include a first hybrid electrode including first electrode cells arranged on a substrate in a first direction and first connection electrodes connecting the first electrode cells to each other in the first direction, and a second hybrid electrode spaced apart from the first hybrid electrode on the substrate. The second hybrid electrode may include second electrode cells arranged in a second direction crossing the first direction and second connection electrodes connecting the second electrode cells to each other in the second direction. The second electrode cells are disposed between the first connection electrodes. The first hybrid electrode may include a first lower transparent layer and a first metal layer which are sequentially stacked, and the second hybrid electrode may include a second lower transparent layer and a second metal layer which are sequentially stacked.



Touch panel and method of detecting coordinate position

Tue, 28 Apr 2015 08:00:00 EDT

Disclosed is a touch panel including an upper conductive layer; a lower conductive layer facing the upper conductive layer with an interval between the upper conductive layer; a capacitive sensing unit that detects a coordinate position by a capacitive coupling under a condition where a predetermined electric potential is applied to the upper conductive layer; and a resistive sensing unit that detects a coordinate position based on an electric potential at a position where the upper conductive layer and the lower conductive layer contact under a condition where a potential gradient is generated on either one of the upper conductive layer and the lower conductive layer.



Techniques for disambiguating touch data using user devices

Tue, 28 Apr 2015 08:00:00 EDT

Techniques for disambiguating touch data and determining user assignment of touch points detected by a touch sensor are described. The techniques leverage both user-specific touch data projected onto axes and non-user-specific touch data captured over a complete area.



Method for identifying changes in signal frequencies emitted by a stylus interacting with a digitizer sensor

Tue, 28 Apr 2015 08:00:00 EDT

A method for dynamically updating at least one pre-defined value of a parameter used to identify at least one operational mode of an object for user interaction with a digitizer sensor during interaction with the digitizer sensor comprises detecting signal outputs from a plurality of sensing elements of a digitizer sensor during user interaction with the digitizer sensor; characterizing a pattern formed by the signal outputs from the plurality of sensing elements; identifying a pre-defined event associated with an operational mode of the object based on the pattern; determining a value of the parameter from the signal outputs in response to identification of the pre-defined event; and updating the pre-defined value used to identify the operational mode based on the value of the parameter determined from the identified event.



Through display ultrasonic touch-screen monitor

Tue, 21 Apr 2015 08:00:00 EDT

A touch-screen monitor is described. The monitor includes an ultrasonic sensor for detecting motion of an object that is placed in contact with the monitor.



Touch panel system and electronic device

Tue, 21 Apr 2015 08:00:00 EDT

A touch sensor panel disclosed herein includes: a plurality of vertical electrodes (6); and a plurality of horizontal electrodes (7), the plurality of vertical electrodes (6) and the plurality of horizontal electrodes (7) (i) being so disposed that, as viewed in the direction perpendicular to a substrate, the plurality of vertical electrodes (6) include no segment coincident with the plurality of horizontal electrodes (7) and (ii) forming a uniform grid having no gap.



Touch sensor mechanism and manufacturing method thereof

Tue, 21 Apr 2015 08:00:00 EDT

A touch sensor mechanism for a touch display device, includes a cover lens made by a transparent material having a dielectric constant greater than 4.5 and a compression strength greater than 700 MPa for generating a finger's touching capacitance (CF) while a user's finger of a user touch thereon; and a sensor device module including a plurality of sensor devices having a sensor parasitic capacitance (CP). The cover lens and the sensor device module are disposed in the touch display device in such a manner that a ratio of a standard deviation value (σU) of the finger's touching capacitance (CF) of the cover lens to the sensor parasitic capacitance (CP) of the sensor device module is a signal-to-noise ratio (SNR). The SNR is adjusted along with the finger's touching capacitance (CF) by reducing the thickness of the cover lens.



Self-capacitance measurement with isolated capacitance

Tue, 21 Apr 2015 08:00:00 EDT

In one embodiment, a method includes dividing a first amount of charge between a capacitance of a touch sensor and a compensation capacitor. The division of the first amount of charge results in a first voltage at an input node. The method also includes isolating the capacitance of the touch sensor from the compensation capacitor; and applying a reference voltage at the input node and a supply voltage at the compensation capacitor. The application of the reference voltage at the input node induces a second amount of charge proportional to a difference between the first voltage and the reference voltage on an integration capacitor. The method also includes determining a first difference between the first voltage and the reference voltage based on a second amount of charge on the integration capacitor; and determining whether a touch input to the touch sensor has occurred based on the first difference.



SAR ADC with dynamic input scaling and offset adjustment

Tue, 21 Apr 2015 08:00:00 EDT

An apparatus for generating an image of touch on or about a touch-sensitive surface comprising a touch panel is disclosed. The touch panel can include a plurality of touch sensors configured for detecting one or more touch events occurring at distinct locations at about the same time. Each touch event can comprise a touching of an object against the touch-sensitive surface. A plurality of receive channels can be coupled to the touch panel for generating values representative of detected touch events. The receive channels can include a charge redistribution successive approximation register digital-to-analog converter (SAR ADC) configured to convert an analog waveform into a digital representation via a binary search and outputting the digital representation to an output register. The SAR ADC architecture can be such that it the dynamic input range can be scaled and offset adjusted.



Smart scanning for a capacitive sensing array

Tue, 21 Apr 2015 08:00:00 EDT

A method and apparatus scan a plurality of scan groups in a capacitive sense array to generate signals corresponding to a mutual capacitance between the electrodes. Each of the plurality of scan groups is formed from a subset of the plurality of electrodes. A processing device identifies a scan group where the generated signal is affected by a presence of a conductive object. The processing device individually scans the subset of the plurality of sense elements in the identified scan group to determine a location of the conductive object.