822 results about "Mutual capacitance" patented technology

A mutual capacitive touch sensing device is disclosed. The touch sensing device includes a mutual capacitive sensing controller having a plurality of distinct drive lines and a plurality of distinct sense lines; a source for driving a current or voltage separately though each drive line; and a mutual capacitance sensing circuit that monitors the capacitance at the sensing lines. The touch sensing device also includes a plurality of independent and spatially distinct mutual capacitive sensing nodes set up in a non two dimensional array. Each node includes a drive electrode that is spatially separated from a sense electrode. The drive electrode is coupled to one of the drive lines and the sense electrode is coupled to one of the sense lines. Each node is set up with a different combination of drive and sense line coupled thereto.

A touch sensor panels having segmented electrodes for both the drive and sense lines. The touch sensor panel may include a number of columns of sense electrodes and a number of rows of drive electrodes. Each of the drive and sense electrodes are connected to one of the metal bus lines using a connecting trace. Pixels on the touch sensor panel are formed by the unique pairings of individual drive electrodes and their adjacent sense electrodes. Electrically, the mutual capacitance of one touch-sensing pixel can be distinguished from the mutual capacitance of another touch sensing pixel because the two mutual capacitances are formed with combinations of different drive electrodes and sense electrodes. In one embodiment, the drive electrodes and sense electrodes in adjacent columns are staggered horizontally with respect to each other by half a Y-pitch of the electrodes.

A space-efficient substantially transparent mutual capacitance touch sensor panel can be created by forming columns made of a substantially transparent conductive material on one side of a first substantially transparent substrate, forming rows made of the substantially transparent conductive material on one side of a second substantially transparent substrate, adhering the two substrates together with a substantially transparent adhesive, bringing column connections down to the second substrate using vias, and routing both the column and row connections to a single connection area on the second substrate. In addition, in some embodiments some of the row connections can be routed to a second connection area on the second substrate to minimize the size of the sensor panel.

A mutual capacitive touch sensing device is disclosed. The touch sensing device includes a mutual capacitive sensing controller having a plurality of distinct drive lines and a plurality of distinct sense lines; a source for driving a current or voltage separately though each drive line; and a mutual capacitance sensing circuit that monitors the capacitance at the sensing lines. The touch sensing device also includes a plurality of independent and spatially distinct mutual capacitive sensing nodes set up in a non two dimensional array. Each node includes a drive electrode that is spatially separated from a sense electrode. The drive electrode is coupled to one of the drive lines and the sense electrode is coupled to one of the sense lines. Each node is set up with a different combination of drive and sense line coupled thereto.

Ultrathin mutual capacitance touch screen and combined ultrathin touch screen composed by the said ultrathin mutual capacitance touch screen, the said ultrathin mutual capacitance touch screen comprises driving electrode clusters and sensing electrode clusters, wherein the driving electrode clusters are connected with an excitation signal source arranged outside the touch screen, and the sensing electrode clusters are connected with a sensing control module arranged outside the touch screen. The driving electrode clusters comprise tabulate driving electrodes which are made of transparent conductive materials and connected in series and / or in parallel, and the sensing electrode clusters comprise tabulate sensing electrodes which are made of transparent conductive materials and connected in series and / or in parallel. In particular, in a pair of adjacent driving electrode and sensing electrode of the touch screen, the plate area of at least one electrode producing the eigen mutual electric field is smaller than that of the same electrode producing the variable mutual electric field. The present invention make the thickness of the touch screen become thinner, and ensure a higher effective capacitivity.

This disclosure provides apparatus, systems and methods of fabricating force-sensitive switches. In some implementations, an array of force-sensitive switches and local capacitors of a combined sensor device may be used to connect the local capacitor into associated projected capacitive touch (PCT) detection circuitry. In some implementations, each capacitor may be formed with a thin dielectric layer to achieve a high capacitance increase when the force-sensitive switch is closed, e.g., by the pressing of a stylus or finger. In some implementations, the same PCT detection circuitry can be used to detect changes in mutual capacitance when touched with a finger (touch mode) and changes in sensel capacitance when the force-sensitive switch is depressed (stylus or fingerprint mode).

A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.

A mutual capacitance touch screen and a combined mutual capacitance touch screen formed by the combination of mutual capacitance touch screens. A driving layer and a sensor layer are included, wherein the driving layer comprises driving electrodes distributed at intervals in the same plane; the sensor layer comprises sense electrodes distributed at intervals in the same plane; and the places where the sense electrodes are distributed in the sensor layer are just over against the intervals between the driving electrodes in the driving layer so that the driving electrodes and the sense electrodes together fill the touch area of the touch screen. The driving electrodes are not over against the sense electrodes in terms of space positions to increase the proportion of capacitance CT to mutual capacitance C, wherein the capacitance CT is formed between the driving electrodes and the top of the sense electrodes; consequently, the effective capacitivity of the mutual capacitance touch screen is effectively increased.

A projected capacitive touch sensor system includes a substrate that defines a plurality of non-overlapping areas. Each non-overlapping area includes a plurality of detection electrodes arranged in non-overlapping columns. The columns include a horizontal detection electrode that extends along substantially an entire height of a first column, and at least a second column of at least two vertical detection electrodes that are electrically isolated from one another. The system further includes a measuring circuit configured to measure a mutual capacitance between the horizontal detection electrode and each of the at least two vertical detection electrodes in a given area. A processing logic circuit of the system is configured to determine horizontal detection electrode and vertical detection electrode combinations that have a changed mutual capacitance. The processing logic is also configured to determine the touch location based on a location of the determined horizontal detection electrode and vertical electrode combinations.

The invention relates to a mutual capacitance-type touch screen and a combined mutual capacitance-type touch screen which is combined by the mutual capacitance-type touch screen. The mutual capacitance-type touch screen comprises a driving layer (200) and a sensing layer (300), wherein the driving layer (200) comprises drive electrodes (210) which are alternately distributed on the same plane; the sensing layer (300) comprises sensing electrodes (310) which are alternately distributed on the same plane; the sensing electrodes (310) are distributed in areas in the sensing layer (300) and the driving layer (200) facing to mutual gap areas of the drive electrodes (210); and the drive electrodes (210) and the sensing electrodes (310) are filled into a touch area (110) of the touch screen together. The space positions of the drive electrodes and the sensing electrodes are not opposite, thereby improving the proportion of capacitances CT formed between tops of the drive electrodes and the sensing electrodes in a mutual capacitance C and effectively increasing the effective inductive capacity of the mutual capacitance-type touch screen.

The present invention is applicable to the field of touch screens, providing a touch contact positioning method, system and video display terminal. The method includes the following steps of: acquiring the coarse positioning results by conducting a self-capacitance detection to an inductor in a capacitive touch screen, acquiring the accurate positioning results by conducting a mutual capacitance detection according to the coarse positioning results, and then determining the position of the touch contact according to the accurate positioning results. The embodiment of the present invention, byacquiring the coarse positioning results by conducting a self-capacitance detection to the inductor in the capacitive touch screen, acquiring the accurate positioning results by conducting a mutual capacitance detection according to the coarse positioning results, and determining the position of the touch contact according to the accurate positioning results, realizes the precise positioning of aplurality of touch contacts and solves the problem of 'ghost points' effectively with less time and complexity.

A system is disclosed for enhancing the stimulation signal bandwidth for a touch sensor panel and maintaining relatively uniform touch sensitivity over the touch sensor panel surface. In one embodiment, a bandwidth enhancement circuit is coupled in parallel to a sensor circuit. The sensor circuit includes a source of stimulating voltage, a drive line, a sense line, and a charge amplifier. The drive line and the sense line are coupled with each other by a mutual capacitance Csig. The bandwidth enhancement circuit can be a RC circuit coupled in parallel to the sensor circuit. The bandwidth enhancement circuit can be represented by two serially coupled resistors, each of which is also coupled to ground on one end, and two capacitors. In particular, one of the capacitors couples the bandwidth enhancement circuit to the drive line, and the other capacitor couples the bandwidth enhancement circuit to the sense line.

A mutual capacitance touch panel device includes a substrate, and an array of electrode elements formed on the substrate. Each electrode element includes a drive electrode, a sense electrode and a reference electrode, the reference electrode arranged between the drive electrode and the sense electrode. A first mutual coupling capacitance is formed between the drive electrode and the reference electrode of each electrode element, wherein the drive electrode and reference electrode are configured such that the first mutual coupling capacitance is substantially insensitive to an object touching the surface of the touch panel.

A method and an apparatus for positioning a touch point on a touch screen are provided. The method includes: detecting simultaneously a self-capacitance and a mutual capacitance of a sensor in the touch screen to obtain a self-capacitance positioning result and a mutual capacitance detecting result respectively; obtaining a mutual capacitance positioning result according to the mutual capacitance detecting result; determining a location of the touch point according to the self-capacitance positioning result and the mutual capacitance positioning result.

A display with integrated touch sensor and a driving method thereof are provided. The display comprises a display data driving circuit that supplies analog video data voltages to data lines of a display panel during a display period and maintains the voltage of the data lines at the same specific DC voltage during a touch sensor driving period; a display scan driving circuit that sequentially supplies scan pulses synchronized with the analog video data voltages to the gate lines of the display panel during the display period; a touch sensor driving circuit that sequentially supplies driving pulses to the Tx lines of the display panel during the touch sensor driving period; and a touch sensor readout circuit that receives a touch signal from the mutual capacitances via the Rx lines of the display panel during the touch sensor driving period.

The invention discloses an in cell touch panel and a display device. A plurality of self-capacitance electrodes which are arranged in the same layer and insulated from one another are arranged in the touch panel according to the principle of the self-capacitance. A touch detection chip can judge the touch position by detecting the capacitance change of each self-capacitance electrode. Due to the fact that body capacitance acts on all self-capacitance, compared with the condition that the body capacitance only acts on projection capacitance in mutual capacitance, the touch variable quantity caused when the human body touches the panel can be large, and therefore the signal to noise ratio of touch can be effectively improved, and accuracy of touch induction can be improved. In addition, compared with the condition that two new film layers need to be added to an array substrate when the touch function is achieved according to the mutual capacitance principle, the touch function can be achieved only by adding one layer of self-capacitance electrodes according to the in cell touch panel touch screen and the display device, and therefore production cost is saved, and production efficiency is improved.

The invention relates to a scanning method for projected capacitive touch panels, which includes the following steps that: (a) the self capacitance reference values of each first electrode and each second electrode and the mutual capacitance reference value of each intersection are set; (b) a controller scans the self capacitances of all the electrodes to obtain the current self capacitance value of each electrode, which is compared with the self capacitance reference value corresponding to the electrode to determine that the first and the second electrodes with the changed self capacitance values are touched; and (c) the controller scans the mutual capacitance of each intersection between the first and the second electrodes determined to be touched in the step b to obtain the current mutual capacitance value of each intersection, which is compared with the mutual capacitance reference value corresponding to the intersection to determine that the area where the intersection with the changed mutual capacitance value is positioned is an actually touched area. The method effectively combines self capacitance scanning with mutual capacitance scanning, the scanning frequency is high, the precision is high, and the method is particularly suitable for the multi-spot scanning of medium-sized and large-sized touch panels.

A touch sensor panels having segmented electrodes for both the drive and sense lines. The touch sensor panel may include a number of columns of sense electrodes and a number of rows of drive electrodes. Each of the drive and sense electrodes are connected to one of the metal bus lines using a connecting trace. Pixels on the touch sensor panel are formed by the unique pairings of individual drive electrodes and their adjacent sense electrodes. Electrically, the mutual capacitance of one touch-sensing pixel can be distinguished from the mutual capacitance of another touch sensing pixel because the two mutual capacitances are formed with combinations of different drive electrodes and sense electrodes. In one embodiment, the drive electrodes and sense electrodes in adjacent columns are staggered horizontally with respect to each other by half a Y-pitch of the electrodes.

A force imaging touch pad includes first and second sets of conductive traces separated by a spring membrane. When a force is applied, the spring membrane deforms moving the two sets of traces closer together. The resulting change in mutual capacitance is used to generate an image indicative of the amount or intensity of the applied force. A combined location and force imaging touch pad includes two sets of drive traces, one set of sense traces and a spring membrane. In operation, one of the drive traces is used in combination with the set of sense traces to generate an image of where one or more objects touch the touch pad. The second set of drive traces is used in combination with the sense traces and spring membrane to generate an image of the applied force's strength or intensity.

A touch sensor panel configured to detect objects touching the panel as well as objects that are at a varying proximity to the touch sensor panel. The touch sensor panel includes circuitry that can configure the panel in a mutual capacitance (near field) architecture or a self-capacitance (far field and super far field) architecture. The touch sensor panel can also include circuitry that works to minimize an effect that a parasitic capacitance can have on the ability of the touch sensor panel to reliably detect touch and proximity events.

Disclosed herein is a touch panel including an active stylus pen, including: a touch panel including a plurality of first electrode patterns and second electrode patterns formed on a substrate in directions in which they intersect with each other; a controller controlling a first driving signal applied to the second electrode patterns and detecting a change in mutual capacitance between the first and second electrode patterns; and the active stylus pen configured separately from the touch panel, and receiving a synchronizing signal from the touch panel when it hovers over or touches the touch panel, generates a second driving signal synchronized with the first driving signal, and outputs the generated second driving signal to the hovering or touching point.

The present invention relates to a method for scanning a projective capacitive touch panel including: A. scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B. detecting the mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode whose self capacitance changes to determine whether the mutual capacitance changes, then the area where the mutual capacitance changes being taken as a touched area. The present invention also relates to a storage medium storing instructions of implementing above method and an apparatus that implements the above method.

Decreasing the cost of a touchpad by avoiding the cost of simultaneously measuring all signals from sense electrodes by using a limited number of measuring circuits to accomplish noise reduction and de-ghosting of signal data to thereby obtain the precise location of multiple fingers on a touchpad, wherein the touchpad separates the drive electrodes into groups to thereby provide a means for obtaining granular location information for de-ghosting the touchpad, and wherein overlapping measurements are made of groups of sense electrodes to obtain data that is separated in time to thereby obtain an averaged signal for each electrode and thereby reduce sensitivity to noise.

Systems and methods for determining multiple touch events in a multi-touch sensor system are provided. The system may include a capacitance measurement unit, a pulse drive unit, and a touch sensor having a plurality of nodes and a plurality of electrodes comprising at least two sets of electrodes. The method may include connecting a first electrode in a first set to the capacitance measurement unit, the pulse drive unit driving a voltage or current pulse onto a second electrode in a second set of electrodes. The method may further include the capacitance measurement unit measuring the mutual capacitance at a node corresponding to the first and second electrodes. The method may include comparing the measured mutual capacitance at the node with a previously measured mutual capacitance for the node, and reporting that the node has been touched if there has been a deviation from the previously measured mutual capacitance.

A touch sensor panel configured to switch between a mutual capacitance near field sensing architecture and a self-capacitance far field sensing architecture. The touch sensor panel includes circuitry that can switch the configuration of touch electrodes to act as either drive lines in a mutual capacitance configuration or as sense electrodes in a self-capacitance configuration. The touch sensor panel also includes circuitry that can switch the configuration of touch electrodes to act as either sense lines in a mutual capacitance configuration or a sense electrode in a self-capacitance configuration.

The invention discloses a capacitance type embedded touch screen and a display device. A public electrode layer connected in a manner of a whole surface in a TFT (Thin Film Transistor) array substrate is divided to form mutually insulated and crossly arranged touch driving electrodes and public electrodes; a touch sensing electrode is arranged on a colorful film substrate; and time-sharing driving is performed on the touch driving electrodes to realize a touch function and a display function. As the projection of the touch sensing electrode on the TFT array substrate is located in an area where the public electrodes are of the touch screen provided by the embodiment of the invention, and the public electrodes and the touch driving electrodes are located at the same layer but insulated mutually, an enfilade area generated between the touch sensing electrode and the touch driving electrodes is avoided, a mutual capacitance formed by the enfilade area is reduced, a proportion of a mutual capacitance variation quantity caused by touch of a finger is added, and touch accuracy is improved. In addition, as the time-sharing driving touch and display functions are adopted, mutual interference is also reduced, and picture quality is increased.

The invention provides a touch detection method of a touch sensor, which relates to the technical field of touch control. The method comprises the following steps that the touch sensor is set to a mutual capacitance mode and a self-capacitance mode alternately; rows and columns of a capacitance matrix of the touch sensor are scanned and detected; when a touch condition is preliminarily judged as multi-finger touch according to a scanning and detection result in a mutual capacitance mode, data obtained by sampling in the self-capacitance mode is further subjected to envelopment analysis; whether the touch condition in the mutual capacitance mode is single-finger touch or the multi-finger touch is judged; if the touch condition is the single-finger touch, a touch coordinate is output; and if the touch condition is the multi-finger touch, a plurality of touch coordinates are output. The invention also provides a touch detection system and a touch control terminal of the touch sensor. With the adoption of the touch detection method, the touch detection system and the touch control terminal, the accuracy of a touch detection result of the touch sensor, particularly the accuracy of the detection result when the single-finger touch and the multi-finger touch are required to be distinguished during the course that the touch control terminal is subjected to large area touch in a suspension state, is improved.

The invention relates to sensor patterns for mutual capacitance touchscreens. According to one embodiment, there is provided a mutual capacitance touchscreen comprising a first set of electrically conductive traces arranged in rows or columns and a second set of electrically conductive traces arranged in rows or columns arranged at right angles with respect to the rows or columns of the first set, where the first and second sets of traces are electrically insulated from and interdigitated respecting one another, and gaps between the first and second sets of traces form boundaries between the first and second sets of traces that undulate and that are not straight or linear. Other embodiments of a mutual capacitance touchscreen are also disclosed, such as ''mini-diamond'' sensor array patterns and sensor array patterns that may be manufactured at low cost.

A touch panel device includes: an electrostatic capacitance touch panel of mutual capacitance type which includes transmission-side electrodes and reception-side electrodes; a detecting unit which detects a contact with the electrostatic touch panel and outputs contact information; and a detection signal variation calculating unit which calculates and outputs detection signal variations of the transmission-side electrodes and the reception-side electrodes based on the contact information. The touch panel device further includes: a variation distribution calculating unit which calculates and outputs a variation distribution of the detection signals based on the detection signal variations; and a determining unit which determines that an object contacting the electrostatic touch panel is a drop of water when a peak value of the variation distribution of the detection signals is a predetermined negative threshold or less.