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Scanning control device, controller and control method of infrared touch screen

An infrared touch screen, scanning control technology, applied in the input/output process of instruments, data processing, electrical digital data processing, etc., can solve the problem of low response speed of the infrared touch screen

Active Publication Date: 2017-03-01
GUANGZHOU SHIRUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional controller makes the infrared touch screen response slow

Method used

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  • Scanning control device, controller and control method of infrared touch screen
  • Scanning control device, controller and control method of infrared touch screen
  • Scanning control device, controller and control method of infrared touch screen

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Embodiment Construction

[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describin...

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PUM

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Abstract

The invention discloses a scanning control device, scanning controller and scanning control method of an infrared touch screen. Clock signals are received by a DMA controller, the DMA controller sequentially obtains a data array in a data list from a memory device in a DMA mode according to the clock signals and sends the data array to a data register, and the data array is stored temporarily through the data register. An IO module is adjusted to be in high level or low level according to the data array. Due to the fact that the DMA controller sequentially obtains the data array in the DMA mode to control the IO module to be adjusted to be in high level or low level, a scanning control signal line generates ordered and continuous signals to be scanned, software command control by the controller is not needed, the controller can carry out other software operation such as touch point coordinate operation in the scanning process, and the response speed of the infrared touch screen is improved.

Description

technical field [0001] The invention relates to the technical field of infrared touch screens, in particular to a scanning control device, a controller and a control method of an infrared touch screen. Background technique [0002] The infrared touch screen is a touch screen that installs an infrared emitting tube and an infrared receiving tube on two sets of opposite sides of the screen frame, and obtains the coordinate position of the touch point by switching the optical path of the infrared pair tubes on the two sets of opposite sides. [0003] The controller of the infrared touch screen lights up each infrared emitting tube sequentially, and detects how much infrared light the corresponding infrared receiving tube can receive (the operation of sequentially lighting up the infrared emitting tube and detecting the infrared receiving tube is called scanning). After a scanning cycle, the controller calculates the touch point according to the occlusion of each light. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042G06F13/28
Inventor 邓孜俊刘扬刘伟高刘军刚
Owner GUANGZHOU SHIRUI ELECTRONICS