Signal receiving device of infrared touch frame

A technology of a signal receiving device and an infrared touch frame, which is applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of high power consumption of the infrared touch frame and the like

Active Publication Date: 2014-03-12
GUANGZHOU SHIRUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The signal receiving device of the traditional infrared touch frame makes the infrared touch frame consume a lot of power

Method used

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  • Signal receiving device of infrared touch frame
  • Signal receiving device of infrared touch frame
  • Signal receiving device of infrared touch frame

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Embodiment Construction

[0014] 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.

[0015] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to t...

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Abstract

Provided is a signal receiving device of an infrared touch frame. A sampling assembly samples current signals output by a receiving tube, an analog switch receives switch sequence signals through a control end, the analog switch is switched on after a transmitting tube of the infrared touch frame emits light through control of the switch sequence signals, and the analog switch is switched off when the transmitting tube does not emit light. When switched on, the analog switch sends the signals sampled by the sampling assembly to a blocking capacitor, and the blocking capacitor couples and filters the signals received when the analog switch is switched on and then obtains and outputs the coupling signals for analog-digital conversion processing. Due to the facts that the analog switch is in a switched-off state when the transmitting tube does not emit light and charges stored by the blocking capacitor will not be released by the sampling assembly, when analog-digital conversion processing is carried out on the coupling signals output by the blocking capacitor, the transmitting tube does not emit light continuously, the working duty ratio of the transmitting tube is reduced, and the power consumption of the infrared touch frame is lowered.

Description

technical field [0001] The invention relates to the technical field of infrared touch screens, in particular to a signal receiving device for an infrared touch frame. 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 signal receiving device of the traditional infrared touch frame makes the current generated after the photoelectric conversion of the infrared receiving tube flow through the grounding resistor to generate a voltage to the ground. This voltage is the original electrical signal. The original electrical signal passes through a DC blocking capacitor to couple the effective signal and filter out the low-frequency interference signal, and then perform analog-to-digit...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 徐文杰刘辉武薛琛谢旺张利财张浩鑫
Owner GUANGZHOU SHIRUI ELECTRONICS
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