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Infrared touch screen and scanning method thereof

A technology of infrared touch and scanning method, applied in instruments, computing, electrical digital data processing, etc., can solve the problems of low frame rate, poor detection effect, affecting the touch detection effect, etc., to achieve high frame rate and improved use effect Effect

Active Publication Date: 2018-09-25
SHENZHEN TIMELINK ECHNOLOGY CO LTD
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Problems solved by technology

[0003] The scanning modes in the scanning method of the existing infrared touch screen include serial scanning and parallel scanning. increase, multiple scans are required to detect all the touch points, the scan frame rate will be greatly reduced, and the scan speed will be reduced, thereby affecting the touch detection effect; Parallel scans parallel strobe infrared emission tubes during the scanning process It takes the same time to complete a full scan as the infrared receiving tube, but its frame rate is lower than that of serial scan when the touch point is small, and its detection effect is also poor

Method used

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  • Infrared touch screen and scanning method thereof
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  • Infrared touch screen and scanning method thereof

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Embodiment Construction

[0019] The invention discloses an infrared touch screen scanning method, please refer to figure 1 , the method includes the following steps:

[0020] S110: Perform parallel scanning on the infrared touch screen to obtain the number of touch points. Specifically, the substrate of an infrared touch screen is generally rectangular or square, and an infrared emitting tube and an infrared receiving tube are arranged opposite to each other on the periphery of the substrate. The infrared rays emitted by the infrared emitting tube can be received by the infrared receiving tube. When touched, the touch point can block the infrared rays emitted by the corresponding infrared emitting tube, so that the corresponding infrared receiving tube cannot receive the infrared rays, so that it can be judged that there is a touch point. The parallel scanning in this step is to simultaneously select multiple infrared emitting tubes and infrared receiving tubes or all infrared emitting tubes and infr...

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Abstract

The invention relates to an infrared touch screen and a scanning method thereof. The method comprises following steps: carrying out parallel scanning operation on the infrared touch screen and judging the number of touch points; selecting a scanning mode based on the number of touch points; and recognizing the touch points. By utilization of the infrared touch screen and the scanning method thereof, the number of the touch points is firstly judged and the touch points are recognized by selecting the scanning mode based on the number of the touch points. Therefore, high frame rate can be obtained during scanning whatever the number of the touch points is so that usage effect is greatly improved.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to an infrared touch screen and a scanning method thereof. Background technique [0002] The infrared touch screen mainly installs several pairs of infrared emitting tubes and infrared receiving tubes on the frame of the screen, and the control unit inside the infrared touch screen gates the infrared emitting tubes and infrared receiving tubes to realize the detection of touch points. [0003] The scanning modes in the scanning method of the existing infrared touch screen include serial scanning and parallel scanning. increase, multiple scans are required to detect all the touch points, the scan frame rate will be greatly reduced, and the scan speed will be reduced, thereby affecting the touch detection effect; Parallel scans parallel strobe infrared emission tubes during the scanning process The time for a complete scan is the same as that of the infrared receiving tube, but its fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 邓华芹闫广林林立俊
Owner SHENZHEN TIMELINK ECHNOLOGY CO LTD