Capacitive touch screen signal sampling system and method based on FPGA

A capacitive touch screen and signal sampling technology, applied in electrical digital data processing, data processing input/output process, instruments, etc. Speed, high versatility, and the effect of improving the response rate

Pending Publication Date: 2021-10-15
中航华东光电有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide an FPGA-based capacitive touch screen signal sampling system and method, to at least solve the problem that the current capacitive touch screen technology cannot adapt to the enlargement and control complexity of the capacitive touch screen

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  • Capacitive touch screen signal sampling system and method based on FPGA
  • Capacitive touch screen signal sampling system and method based on FPGA

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0023] For capacitive touch screens of different sizes and resolutions, the number of sensing and receiving channels of the screen sensor is different. How to quickly receive and process the analog signals from these channels is very critical, so as to provide sufficient data for subsequent series of data processing and calculation. Time, thereby reducing the response time of the touch and improving the touch performance of the touch screen. In a small-sized capacitive touch screen, the number of sensing channels of the screen sensor is small, so fewer analog signals need to be received and processed, and the circuit design is relatively simple; for a large-size...

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Abstract

The embodiment of the invention provides a capacitive touch screen signal sampling system and method based on an FPGA, and belongs to the technical field of touch screens. The system comprises: a screen receiving signal connector used for acquiring a screen receiving signal; the chip selection signal module that is used for sequentially carrying out multi-path screen receiving signal parallel gating according to the gating instruction issued by the FPGA control module; the charge transfer method measuring circuit that is used for receiving the multi-path screen receiving signals in parallel, converting the multi-path screen receiving signals into multi-path analog signals and sending the multi-path analog signals to the ADC sampling module in parallel; the ADC sampling module that is used for receiving the multiple paths of analog signals in parallel, converting each path of analog signal into a differential digital signal and sending the differential digital signal to the FPGA control module; and the FPGA control module that is used for decoding each path of differential digital signal and processing data obtained by decoding. The system provided by the scheme of the invention is simple and reliable in structure and can be flexibly applied to capacitive touch screens of various sizes, and the response rate of the capacitive touch screen is greatly improved.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to an FPGA-based capacitive touch screen signal sampling system and an FPGA-based capacitive touch screen signal sampling method. Background technique [0002] With the development and wide application of smart device technology, more and more smart device control methods use touch screen control methods. The capacitive touch screen technology that uses the current induction of the human body to work is one of the most widely used technologies. For capacitive touch screens of different sizes and resolutions, the number of sensing and receiving channels of the screen sensor is different. How to quickly receive and process the analog signals from these channels is very critical. To reduce the response time of the touch and improve the touch performance of the touch screen, has significant meaning. In the traditional capacitive touch screen, all the channel signals are received ...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0416G06F3/044
Inventor 沈丙娇宁国勋毛强吴豪杰章小兵黄少肃陈召全
Owner 中航华东光电有限公司
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