Abstract: The invention, upon receiving an input signal, sums the absolute values of the difference of each pair of values adjacent to each other within a series of detected signal values to suppress the interference of low-frequency noise. Furthermore, the invention sums the absolute values of the moving averages of the differences of each pair of values adjacent to each other within a series of detected signal values to suppress both the interference of low-frequency noise and the interference of high-frequency noise. No synchronization with the input signal is necessary. The detection can be started at any phase of the input signal.

Abstract: The invention detects the difference between the maximum signal and the minimum signal at each of a plurality of cycles separately when a sine wave is received. All differences are summed for generating a single detected signal for suppressing the interference of low-frequency noise. No synchronization with the sine wave is necessary and the detection can start at any phase of the sine wave.

Abstract: The invention discloses a system and method for communication through touch screens that uses a first touch screen and a second touch screen for communication to form a communication system. The first and the second touch screens have a detecting mode for detecting an approach or touch of an external conductive object. In addition, the first and the second touch screens have a communication mode in which capacitively coupled communications between the first and the second touch screens are performed in order to exchange or communicate a message.

Abstract: A method and device for analyzing positions are disclosed. In sensing information, at least one position is determined according to a first characteristic of a touch related sensing information. The sensing information also has a touch related sensing information with a second characteristic, which is opposite to the first characteristic. The touch related sensing information with the second characteristic is neglected or filtered. In addition, another method and device for analyzing positions are disclosed. An AC signal is provided through a pen, and a first characteristic of a touch related sensing information corresponding to a finger is opposite to the second characteristic of the touch related sensing information corresponding to the pen. The first characteristic and the second characteristic can be used to distinguish the touch of the finger from the touch of the pen or for palm rejection.

Abstract: A capacitive touch screen includes a plurality of first conductive strips and a plurality of second conductive strips. Each of the first and the second conductive strips includes a plurality of branches on at least one side thereof. The branches of the first conductive strips and the branches of the second conductive strips are distributed in the spaces of each other. The branches are bent in a clockwise direction and/or an anticlockwise direction.

Abstract: When a touch sensor is approached or touched by an object having a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined.

Abstract: When a touch sensor is approached or touched by a capacitive pen in a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined. The capacitive pen can be made of bonded conductive fibers.

Abstract: When a touch sensor is approached or touched by a capacitive pen in a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined. The capacitive pen can be made of bonded conductive fibers.

Abstract: A detection method and device for a touch screen is provided. When a pen touching or approaching the touch screen is detected, only the location of the pen in a predetermined range is provided, and the locations of all other objects within the predetermined range are not provided, such as the location of a palm. Only if the pen and all the objects in the predetermined range are no longer detected, then the locations of objects other than the pen in the predetermined range are provided again.

Abstract: The present invention provides a circuit for concurrent integration of multiple differential signals. The circuit comprises a plurality of Stage 1 integration circuit arranged in array and a plurality of Stage 2 integration circuit arrange in array. Each of said Stage 1 integration circuit is configured to concurrently integrate an input signal to send out a Stage 1 positive signal and a Stage 1 negative signal which is reverse to said Stage 1 positive signal. Each of said Stage 2 integration circuit is configured to integrate a differential signal from a Stage 1 positive signal sent from a corresponding Stage 1 integration circuit and a Stage 1 negative signal sent from another Stage 1 integration circuit next to said corresponding Stage 1 integration circuit to output a Stage 2 signal.

Abstract: The present invention provides an integration and analog to digital conversion circuit sharing common capacitors. The circuit comprises a capacitor array module, an integration circuit, and an analog to digital conversion (ADC) logic. The capacitor array module has a plurality of capacitors. The integration circuit is configured to integrate an analog signal by the capacitor array module. The ADC logic is configured to convert the output of the capacitor array module to a digital signal.

Abstract: The present invention provides an integration and analog to digital conversion circuit sharing common capacitors. The circuit comprises a first capacitor array module, a second capacitor module, an integration circuit, an analog to digital conversion (ADC) logic. The first capacitor array module has a plurality of capacitors. The second capacitor array module has a plurality of capacitors. The integration circuit is configured to integrate an analog signal by said first or said second capacitor array module. The ADC logic is configured to convert the output of said first or said second capacitor array module to a digital signal. The ADC logic performs conversion by said first capacitor array module while said integration circuit performs integration by said second capacitor array module, and said ADC logic performs conversion by said second capacitor array module while said integration circuit performs integration by said first capacitor array module.

Abstract: The invention discloses a full screen driven detection. A driving signal is simultaneously provided to all first conductive strips arranged in parallel in a first direction in a touch screen, and mutual capacitive signals are detected from all second conductive strips arranged in parallel in a second direction. The mutual capacitive signals can be used for determining whether an external conductive object coupled to the ground is touching or approaching the touch screen or not even if water or other conductive object not coupled to ground is on the touch screen. Thus, the baseline of the mutual capacitive signals can be updated if the touch screen is not touched or approached by any external conductive object coupled to ground over a predetermined period of time.