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A touch-sensitive positioning device and system

A technology of touch sensing and positioning devices, which is applied in the fields of instruments, computing, and electrical digital data processing, etc., can solve the problems of single-targeted technology and high power consumption, and achieve the effects of strong anti-interference, low power consumption, and wide application range

Active Publication Date: 2016-09-14
NATIONZ TECH INC
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Problems solved by technology

[0002] In the current touch sensing application, the technical solutions adopted by the touch sensing positioning device (also called multi-touch detection device) of the touch screen include Cypress's CSD (CapSense Delta-Sigma), CSA (CapSense Approximating), CSR (CapSense Relaxation Oscillator ), Atmel's Qtouch (CapSenseRelaxation Oscillator) technology, etc. These technologies have mature and reliable advantages, but these technologies are single-targeted and are only suitable for double-layer self-capacitance screens, and due to the use of ADC (Analog- to-DigitalConverter, analog / digital converter), resulting in generally high power consumption

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  • A touch-sensitive positioning device and system
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  • A touch-sensitive positioning device and system

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Embodiment Construction

[0049] The principle on which the touch sensing positioning device of the present invention is based is: in touch applications, the capacitance value C is composed of two parts: the fixed capacitance Cx and the induction capacitance Cf brought when the human hand touches or approaches the contact sensing module, by detecting each time before and after the touch The position touched by the finger can be judged by the delay variation ΔT generated by Cf at the first output terminal. There are two sensing methods that can be achieved, such as Figure 9A with Figure 9B As shown: one is to observe the delay variation of the output terminal relative to the rising edge of the input terminal, and the second is to observe the delay variation of the output terminal relative to the falling edge of the input terminal. Figure 9A with Figure 9B They are the waveform diagram of the delay variation of the output terminal relative to the rising edge of the input terminal and the waveform d...

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Abstract

The invention relates to a touch sensing positioning device and system, wherein the touch sensing positioning device comprises a pulse signal transceiver module and a processing module; the pulse signal transceiver module is used for applying a pulse excitation signal to the input end of a contact sensing module and receiving a row delay signal and a column delay signal produced through the contact sensing module at the output end of the contact sensing module on the basis of a fact that whether the contact sensing module is touched; and the processing module is used for confirming the position of a contact according to the row delay signal and the column delay signal produced on the basis of the fact that whether the contact sensing module is touched. A digital delta TDC (Time Density Curve) is adopted by the touch sensing positioning device and system, and compared with an ADC (Analog to Digital Converter) applied to the traditional touch detection, the touch sensing positioning device and system have the advantages of wide application range and low power consumption; and furthermore, due to adoption of the digital delta TDC, the touch sensing positioning device also has the advantages of high precision, strong interference resistance and small size.

Description

technical field [0001] The invention relates to touch positioning technology, in particular to a touch-sensing positioning device and system. Background technique [0002] In the current touch sensing application, the technical solutions adopted by the touch sensing positioning device (also called multi-touch detection device) of the touch screen include Cypress's CSD (CapSense Delta-Sigma), CSA (CapSense Approximating), CSR (CapSense Relaxation Oscillator ), Atmel's Qtouch (CapSenseRelaxation Oscillator) technology, etc. These technologies have mature and reliable advantages, but these technologies are single-targeted and only applicable to double-layer self-capacitance screens, and these technologies are due to the use of ADC (Analog- to-DigitalConverter, analog / digital converter), resulting in generally high power consumption. Therefore, an optimized touch-sensing positioning device with a wider application range and low power consumption is an important development dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041
Inventor 梁洁律博苏建华王莹莹韩路栾昌海
Owner NATIONZ TECH INC
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