Two-stage gating device and method for infrared screen receiving elements

A receiving element and infrared technology, which is applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of complex scanning methods and long time-consuming single-stage gating circuits, and achieve the effect of convenient promotion and application

Active Publication Date: 2014-07-02
BEIJING IRTOUCH SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the time-consuming technical problem of using a single-stage gating circuit when the scanning method is complex, thereby providing a two-stage gating device and a gating method for infrared screen receiving elements that take a short time

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  • Two-stage gating device and method for infrared screen receiving elements

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Embodiment Construction

[0028] Schematic structure of a two-stage gating device used for infrared screen receiving elements according to the present invention figure 1 As shown, it includes: a processor 1 , a pre-selection control circuit 2 and a latch control circuit 3 .

[0029] Processor 1, comprising a first output terminal for outputting gating information of a group of receiving elements and a second output terminal for outputting a latch signal;

[0030]The pre-selection control circuit 2 includes an input terminal and an output terminal, the input terminal of the pre-selection control circuit 2 is electrically connected to the first output terminal of the processor 1, and is used to receive the first output terminal of the processor 1 output receiving element gating information, and process the gating information, convert it into a gating signal corresponding to the receiving element, and pass the gating signal through the output terminal of the pre-gating control circuit 2 Output; the gatin...

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Abstract

The invention relates to a two-stage gating device for infrared screen receiving elements. The two-stage gating device for the infrared screen receiving elements comprises a processor, a pre-gating control circuit and a latch gating control circuit. The processor outputs a latch signal to the latch gating control circuit and outputs a gating message of a next set of receiving elements to the pre-gating control circuit at the same time. The invention further provides a gating method of the two-stage gating device for the infrared screen receiving elements. In the working process of the current set of receiving elements, the processor sends the gating message of the next set of receiving elements to the pre-gating control circuit, the pre-gating control circuit converts the gating message into corresponding gating signals of the next set of receiving elements, and the latch signals output by the processor latch the gating signals of the next set of receiving elements to the latch gating control circuit. After the current set of receiving elements finish working, the latch gating control circuit releases the gating signals of the next set of receiving elements to a receiving element matrix, and then the next set of receiving element start to work. By the gating mode, the gating time is largely shortened.

Description

technical field [0001] The invention relates to a gating circuit, in particular to a two-stage gating device and a gating method for infrared screen receiving elements, belonging to the technical field of infrared screen touch control. Background technique [0002] Usually, an infrared touch screen is a circuit board frame installed in front of the display, and infrared emitting elements and infrared receiving elements are arranged on the four sides of the circuit board frame. On the two opposite sides of the frame, a crossed infrared matrix is ​​formed. Generally, an infrared touch screen can gate the infrared emitting element and the corresponding one or more infrared receiving elements one by one, so that the light beam emitted by an infrared emitting element is received by the corresponding one or more infrared receiving elements, and according to the infrared receiving element The infrared beam received by the element determines the position of the touching object. Sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 刘洋刘新斌
Owner BEIJING IRTOUCH SYST CO LTD
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