Abstract: A clustered scan method of a capacitive touch device is disclosed. According to the method, n drive lines of the capacitive touch device are divided into multiple clusters. Each of the clusters has a same number of drive lines. The clusters are driven by a clustered scan procedure in sequence. In each clustered scan procedure, the drive lines of the present cluster are driven for b times, wherein b is equal to the number of the drive lines of each cluster. If at least one bordering drive line exists, a bordering clustered scan procedure is executed, and a bordering drive line and some of drive lines of the previous clusters are driven.

Abstract: A capacitive touch panel has multiple electrode couples formed on a substrate. Each electrode couple has multiple first electrodes and multiple second electrodes. Each of the first electrode and the second electrode has three traces. Each end of one of the three traces is connected to one end of one of the other two traces. The three traces of the first electrode and the three traces of the second electrode are alternately arranged. Given the foregoing layout of the electrode couples, the first electrodes and the second electrodes have symmetrical capacitance values and resistance values. Accordingly, the capacitive touch panel has an enhance signal-to-noise ratio and an anti-interference capability.

Abstract: A method of identifying edge touch gesture has steps of scanning the touch device under a hover mode; scanning the touch device under a touch mode; determining if there is a touch object on the touch device according to a scanning result of the touch mode; and when there is a touch object on the touch device, identifying the gesture according to a scanning result of the hover mode and the scanning result of the touch mode. Accordingly, the method can perform valid touch on the edge area, rendering effective identification of edge touch gesture and an increased success rate of the identification.

Abstract: A sensing method and circuit of fingerprint sensor is disclosed and the sensing method has steps of (a) in the first phase, supplying a first voltage to the electrode plate to be measured and a conductor adjacent to the electrode plate to be measured and setting a voltage of a sensing capacitor, wherein the sensing capacitor is coupled between a first input and an output terminal of the operational amplifier and the electrode plate to be measured disconnects to the first input terminal of the operation amplifier; and (b) in the second phase, stopping to supply the first voltage to the electrode plate to be measured and the conductor, supplying a second voltage to the conductor and a second input terminal of the operational amplifier, and connecting the electrode plate to be measured to the first input terminal to change the voltage of the sensing capacitor.

Abstract: A capacitive touch panel with single sensing layer has a substrate. The substrate has the single sensing layer formed thereon. The sensing layer has multiple electrode sets. Each electrode set has multiple driving electrode rows and multiple receiving electrode rows arranged alternately. The multiple driving electrode rows of one electrode set have different driving electrodes, but different electrode sets have the same multiple driving electrode rows. The multiple receiving electrode rows of one electrode set are consisted of multiple same receiving electrodes, but different electrode sets have different receiving electrode rows. Therefore, using less contacts can also maintained the area and the solution so that the pins on the IC are also decreased. Thus, the volume of the IC is reduced and the packaging cost is also reduced.

Abstract: A fingerprint sensor having ESD protection structure and has a substrate having an upper surface. Multiple sensing electrode plates, an ESD protection electrode part connected to ground, a dielectric layer and a protection layer are formed on the upper surface in bottom-up sequence. The ESD protection layer has a first conductive layer and a second conductive layer. The first conductive layer is formed on the upper surface and coplanar with the sensing electrode plates. The second conductive layer is formed on the dielectric layer and has multiple separated conductive elements. Each of conductive elements overlaps the first conductive layer along a vertical axis and connected to the first conductive layer via multiple vias formed in the dielectric layer. When the first conductive layer and/or the second conductive layer are/is coupled to ground, both of the first and second conductive layers are established a discharging path of static electricity.

Abstract: A fingerprint sensor having ESD protection has a body and an ESD protection circuit. The body has a fingerprint sensing electrode array and an ESD protection electrode providing an ESD protection to the fingerprint sensing electrode array. The ESD protection circuit is connected respectively to the ESD protection electrode, a high electric potential terminal and a low electric potential terminal. The ESD protection circuit provides a first static electricity discharge path to the high electric potential terminal, and a second static electricity discharge path to the low electric potential terminal. The fingerprint sensor provides two static electricity discharge paths, so that the fingerprint sensor has a better ESD protection.

Abstract: A sensing method and circuit of fingerprint sensor is disclosed. In a first phase, the sensing method supplies a first to third voltages to an electrode plate to be measured, a read-out circuit of the electrode plate to be measured and a conductor adjacent to the electrode plate to be measured, respectively. In a second phase, the sensing method stops supplying the first to third voltages and supplies voltage to the conductor and connects the electrode plate to be measured to the read-out circuit so the read-out circuit reads out a measurement result of the electrode plate to be measured. According to the sensing method and circuit, the measurement result of the electrode plate to be measured is not affect by capacitors between the electrode plate to be measured and the conductor.

Abstract: A method of identifying edge swipe gesture has steps of respectively reading sensing signals on an edge area under a hover mode and on a non-edge area under a touch mode; determining if a touch object has appeared on the edge area after determining that the object has appeared on the non-edge area, calculating a displacement of the object moving from the edge area to the non-edge area within a preset time and determining if the displacement exceeds a preset distance, and determining that the movement of the touch is identified as an edge swipe gesture if the displacement meets the condition. Accordingly, the present invention can perform valid touch on the edge area, rendering effective identification of edge swipe gesture and an increased success rate of the identification.

Abstract: A method of identifying a palm area for a touch panel has steps of: receiving sensing frame information having multiple touching sensing points from the touch panel; selecting one of the touching sensing points; outwardly extending a distance from an outline of the selected touching sensing point to define a searching range; checking whether other touching sensing points are within the searching range; marking the touching sensing points in the searching range and expanding the searching range based on the currently marked touching sensing points; sequentially selecting and checking each touching sensing point if it is within the present searching range; and finally merging all the outlines of the marked touching sensing points to form a final outline as a palm area. Other unmarked touching sensing points are defined as touching reference points.

Abstract: A clustered scan method of a capacitive touch device has steps of simultaneously providing driving signals in one driving cycle to multiple driving lines including the (i?j)th drive line to the (i+k)th drive line, and simultaneously providing driving signals in a next driving cycle to the drive lines including some of the drive lines driven in the previous driving cycle with a sum of the driving signal in each driving cycle greater than zero. When the stimulated drive lines include a bordering drive line, the driving lines are determined according to a relationship among i, j and k. Accordingly, the signal to noise ratio of the touch device can be increased and the adverse effect for common ground occurring between a measuring system and a human body can be reduced so that the multi-finger positioning issue can be resolved.

Abstract: The present invention is related to a capacitive touch device and excitation signal generating circuit and method thereof. The excitation signal generating circuit is connected to multiple sensing traces of the capacitive touch device, and has a storage unit storing at least one set of digital data. Each set of digital data is corresponding to a frequency. The PDM signal generator reads the set of digital data and converts the read set of digital data to a PDM signal according to the frequency of the read set of digital data. The PDM signal is recovered to an analog excitation signal since the PDM signal passes through a current transmission path, which is equivalent to a low pass filter. Therefore, the present invention can decrease a distortion of the sensing signal to increase accuracy of the sensing signal and to save power.

Abstract: A scanning method and device of a single layer capacitive touch panel has a self and mutual capacitive scanning procedures. The single layer capacitive touch panel has multiple electrode groups and shielding units respectively formed between the two corresponding adjacent electrode groups. When the self capacitive scanning procedure is executed, a first driving signal is outputted to each of the electrode groups and each of the shielding units. A self capacitive sensing signal of the driven electrode group is received after then. When the mutual capacitive scanning procedure is executed, a second driving signal is outputted to each of the electrode group and each of the shielding unit is connected to a ground. A mutual capacitive sensing signal from each of the driven electrode groups is received after then. Therefore, the self capacitance value of the self capacitive sensing signal is not increased greatly since the shielding units are not connected to the ground.

Abstract: The present invention relates to a scan method for a touch panel and a touch device. It operates two different Analog-to-Digital Converter calibrations to have different baselines and thresholds corresponding respectively to a cursory scan mode and a fine scan mode. In cursory scan mode, multiple traces are driven simultaneously and the signals from the traces are received simultaneously to enlarge the sensing value so that a touch object with a lower sensing signal is also detected. Further, the cursory scan mode with less electricity cost is used to first determine whether touch objects exists. When the touch objects do exist, the fine scan mode with more electricity cost is then operated. Therefore, the present invention can further reduce the electricity waste.

Abstract: A method for controlling a touch control device includes defining a first area and a second area on a touchpad, detecting whether a touched position on the touchpad that is touched by an operating object falls in the first area or the second area, and calculating the corresponding on-screen coordinates of the operating object with different sets of ratios depending on the touched position.

Abstract: A capacitive touch device and a method identifying touch object on the touch device read sensing information of multiple traces of a touch panel corresponding to a touch object, in which the sensing information includes a sensing cluster corresponding to a portion on the touch panel touched by the touch object, identify a hover cluster of the sensing information corresponding to a portion adjacent to and surrounding the sensing cluster, determine if the hover cluster meets a first characteristic, and determine that the touch object is a specific touch object when the hover cluster meets the first characteristic. Given the foregoing device and method, a palm rejection operation can be more accurately performed and is also applicable to object detection at corners of the touch panel.

Abstract: A circuit for sensing a differential capacitance includes a charge-storing circuit to generate a first output voltage and a second output voltage related to capacitances at two terminals of the differential capacitance, respectively, an operational amplifier to amplify the difference between the first and second output voltages to generate a sensing value, a first sampling capacitor having one terminal connected to the negative input terminal and the other terminal receiving the first or second output voltage, and a second sampling capacitor having one terminal connected to the negative input terminal and the other terminal switched to the output terminal of the operational amplifier. The second sampling capacitor stores a non-ideal error value to offset the non-ideal effect of the operational amplifier imparted on the sensing value.

Abstract: A screen control module of a mobile electronic device has at least one controller formed on a circuit board. The circuit board has multiple solder pads formed on the circuit board and respectively aligning along a first direction and a second direction. An amount of the solder pads along the first direction is greater than that along the second direction. The controller is formed by an integrated circuit with a package, and the aspect ratio of the package is not less than 2. The package has multiple electrical contacts respectively aligning along a length direction and a width direction. Each electrical contact aligns with and is electrically connected to a corresponding solder pad. Accordingly, the screen control module mounted within a side frame of a display of the mobile electronic device can increase the aspect ratio to meet the demand for narrowing the side frame of the display.

Abstract: A method of identifying a palm area for a touch panel has steps of: receiving sensing frame information having multiple touching sensing points from the touch panel; selecting one of the touching sensing points; outwardly extending a distance from an outline of the selected touching sensing point to define a searching range; checking whether other touching sensing points are within the searching range; marking the touching sensing points in the searching range and expanding the searching range based on the currently marked touching sensing points; sequentially selecting and checking each touching sensing point if it is within the present searching range; and finally merging all the outlines of the marked touching sensing points to form a final outline as a palm area. Other unmarked touching sensing points are defined as touching reference points.

Abstract: A method for controlling a touch control device includes defining a first area and a second area on a touchpad, detecting whether a touched position on the touchpad that is touched by an operating object falls in the first area or the second area, and calculating the corresponding on-screen coordinates of the operating object with different sets of ratios depending on the touched position.