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Infrared touch screen based input method and system

A technology of infrared touch screen and input method, which is applied in the field of computers, can solve the problems of inconvenient switching status and achieve the effect of easy operation

Active Publication Date: 2009-10-07
NEWLINE CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the operation of switching state brings a lot of inconvenience

Method used

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  • Infrared touch screen based input method and system
  • Infrared touch screen based input method and system
  • Infrared touch screen based input method and system

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Embodiment Construction

[0022] combine figure 1 and figure 2 The invention is described, figure 2 It is the structural representation of the embodiment of the present invention, adopts PIC16C745 of MICROCHIP as processor 202, integrates a communication interface 201, an 8-bit A / D converter, carries 8KB memory 209 (not shown among the figure) in the chip. The infrared transmitting network 205 and the infrared receiving network 206 adopt a quadruple group, which is convenient for production. The decoding network 203 uses a common logic chip, and the electronic switch network 207 selects a basic amplifier circuit. The coordinates are sent to the computer software for processing through the communication interface 201 .

[0023] figure 1 It is a program flow chart of judging writing and dragging screen operations implemented according to the method of the present invention.

[0024] Step 101, after the signals of the infrared transmitting network 205 and the infrared receiving network 206 pass thr...

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Abstract

An input method and system based on an infrared touch screen, comprising the following steps: checking the coordinates of the points of the infrared transmitting / receiving tubes according to the blocked X-axis and Y-axis, calculating the distance between the points, if only one point is blocked If the distance is off, set the distance to 0; if the distance is between the predefined first value and the second value, it will be processed as the first type of operation; if the distance is smaller than the first value, it will be processed as the second type Operation type processing; if the distance is greater than the second value, the current processing type is not changed. The beneficial effect of the present invention is that: the conversion of the infrared touch screen user's writing and mobile screen operation is determined by the number of contact points in contact with the touch screen, that is, one finger is writing, two or more fingers are Move the screen instead of switching the operation of writing and moving the screen through a specific function key, which is convenient for operation.

Description

technical field [0001] The invention relates to computer technology, more specifically, to an input method based on an infrared touch screen. Background technique [0002] Infrared technology works by multiple pairs of infrared emitting and receiving tubes. The performance and life of the infrared tubes are relatively reliable. Using the same wavelength of infrared emitting tubes and infrared receiving tubes (referred to as infrared tubes) can get a simple infrared detection method. . Any object that blocks light can be used as a pen. As long as there is an object blocking the connection between the infrared tubes, the received signal will drop sharply. Therefore, infrared rays can detect objects blocking, so it is used in anti-theft systems, automatic induction systems, counters, etc. widely used in the system. The infrared electronic whiteboard is densely covered with an infrared matrix in the X and Y directions in front of the screen, and detects and locates the user's ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 郭亚临马健谢晓东左春生
Owner NEWLINE CO LTD
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