An infrared touch screen scanning method and device
A technology of infrared touch screen and scanning method, which is applied in the directions of instruments, calculations, electrical digital data processing, etc., can solve the problems of inaccurate scanning range and long scanning time, and achieve the effect of accurate scanning range and reduced scanning time
Active Publication Date: 2019-12-13
HISENSE VISUAL TECH CO LTD
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Problems solved by technology
[0005] In order to solve the problem that the infrared touch device in the prior art is tracking and scanning, the touch area obtained by the first scan is used as the target area for each scan, resulting in an inaccurate scanning range calculated according to the target area, and there is a problem that the scanning takes a long time , the embodiment of the present invention provides an infrared touch screen scanning method and device
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[0027] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings.
[0028] The embodiment of the present invention provides an infrared touch screen scanning method, which is applied to an infrared touch device including an infrared touch screen, and is used to scan touch points on the infrared touch screen. The infrared touch screen set on the infrared touch device is still figure 1 As shown as an example, a plurality of infrared emitting tubes are uniformly arranged on two adjacent sides of the infrared touch screen, and a plurality of corresponding infrared receiving tubes are uniformly arranged on two adjacent sides. For ease of description, the infrared emitting tube on one side is taken as the first group of infrared emitting tubes, and the side where the first group of infrared emit...
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The invention discloses an infrared touch screen scanning method and device, which relate to the technical field of touch and can solve the problems of inaccurate scanning range and relatively long scanning time of an infrared touch device during tracking and scanning in the prior art. According to the specific scheme, the method comprises the steps of determining a target region; determining a scanning range according to a vertex of the target region and a current scanning direction; performing scanning in the scanning range according to the current scanning direction to obtain a touch region where a touch point is; and determining an overlapped region between the target region and the touch region as a target region in a next scanning direction. The target region is updated according to the last scanned touch region, so that the scanning range calculated according to the target region is more accurate and the scanning time is shortened. The scanning method and device are used for scanning an infrared touch screen.
Description
Technical field [0001] The embodiments of the present invention relate to the field of touch technology, in particular to an infrared touch screen scanning method and device. Background technique [0002] With the infrared touch screen set on the infrared touch device such as figure 1 As shown as an example, the adjacent two sides of the infrared touch screen are provided with multiple infrared emitting tubes, and the adjacent two sides are provided with corresponding multiple infrared receiving tubes. The infrared emitting tube is used to emit infrared light in a preset direction, and the infrared receiving tube receives infrared light to realize a global scan of the preset direction on the infrared touch screen. During the scanning process, the propagation path of the infrared light is called the optical path. If a user performs a touch operation on the infrared touch screen, touch points will fall on the infrared touch screen. The touch point will block the infrared light emi...
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IPC IPC(8): G06F3/042
CPCG06F3/042
Inventor 张晓娜王武军张旭王守帅
Owner HISENSE VISUAL TECH CO LTD