Touch point recognition device of touch screen
A recognition device and touch screen technology, applied in the field of image processing, can solve the problems of high cost, complex manufacturing process, and low recognition accuracy, and achieve the effect of low cost, simple manufacturing process, and high recognition accuracy
Inactive Publication Date: 2015-09-30
刘笑纯
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Problems solved by technology
[0004] In the process of realizing the touch point recognition of the above-mentioned touch screen, the inventor found that there are at least the following problems in the prior art: the touch point recognition of the resistive touch screen is limited by the voltage, cannot recognize multiple touch points at the same time, does not support multi-touch, and The production process is complicated and the cost is high
The touch point recognition of the capacitive touch screen is limited by the current. When a conductor is close to the touch screen, it is easy to cause misidentification of the touch point. The recognition accuracy is low, and the manufacturing process is complicated and the cost is high.
The touch point recognition of the infrared touch screen is limited by the screen resolution and device accuracy, and the recognition accuracy is low
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Embodiment 1
[0024] figure 1 It is a logic block diagram of an embodiment of the touch point recognition device of the touch screen provided by the present invention. figure 2 for figure 1 The side view of the touch screen, line laser and camera in the shown touch point recognition device for touch screen. image 3 for figure 1 The schematic diagram of the reflected light spot collected by the camera in the touch point recognition device of the touch screen is shown. Such as Figure 1 ~ Figure 3 As shown, the touch point recognition device according to the embodiment of the present invention specifically includes a touch screen 11 , a line laser 12 , a camera 13 , a controller 14 , a processor 15 and a display 16 . in:
[0025] The controller 14 is connected to the line laser 12 and the camera 13 respectively, and the processor 15 is connected to the controller 14 and the display 16 respectively.
[0026] The touch screen 11 is arranged in the image collection area of the camera 1...
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The invention provides a touch point recognition device of a touch screen. The device comprises the touch screen, a line laser device, a camera, a controller, a processor and a display. The line laser device is controlled by the controller to emit line lasers parallel with the touch screen. The camera is controlled by the controller to collect images of reflective light spots of touch points of the line lasers on the touch screen, and the images are sent to the processor through the controller. The processor obtains position information of the reflective light spots on a display interface according to the images of the reflective light spots and sends the position information to the display. The display displays the positions of the touch points, corresponding to the reflective light spots, of the display interface according to the position information of the reflective light spots on the display interface. By means of the touch point recognition device of the touch screen, multi-point touch is supported. When a conductor is close to the touch screen, mistaken recognition of the touch points is not caused, and recognition precision is high. The manufacturing technology is simple and cost is low. The touch point recognition device of the touch screen is not limited by screen resolution and device precision, and the recognition precision is high.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a touch point recognition device of a touch screen. Background technique [0002] With the emergence of more and more touch screens, it is particularly important to accurately identify touch points on the touch screen. [0003] In the prior art, the touch point identification method of the touch screen mainly includes the following methods: 1. For the resistive touch screen, the touch screen is composed of two layers of transparent resistive materials with surface resistance separated up and down. When the screen feels the touch, that is, when the surface of the touch screen is under sufficient pressure, there will be contact between the top layer and the bottom layer, and the corresponding electrical signal will be transmitted from the sensor. Using the principle of voltage division, the physical position of the touch point can be converted to represent x, y The voltag...
Claims
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IPC IPC(8): G06F3/042
Inventor 刘笑纯
Owner 刘笑纯