Area scanning method, scanning device and touch screen system for non-direct scanning of infrared tube-to-tube touch screen
An infrared tube and area scanning technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of long scanning period and slow touch response speed, reduce the scanning area and improve touch The effect of response speed and time-consuming reduction
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no. 1 example
[0039] Embodiment 1: In this embodiment, an area scanning method for non-facing scanning of an infrared tube touch screen that performs area scanning at only one oblique scanning angle is described.
[0040] Such as figure 2 As shown, as an embodiment, this embodiment first scans the touch screen through the forward scanning method provided by the prior art, and obtains the position coordinates of the logical touch points on the touch screen (step 1), of course, it does not exclude the user from other methods Perform this step:
[0041] After the touch screen is started, it starts to scan, such as image 3 , as shown in , when the number of touch points being scanned is not more than 1, the forward scan is continued, and the position of the touch point is judged according to the light tube blocked by the touch object, as shown in Figure 4 . According to the light tube blocked by the touch object, judge the position of the logical touch point, such as Figure 5 . The dot...
no. 2 example
[0043] The second embodiment: this embodiment describes the area scanning method of the non-facing infrared tube touch screen for area scanning when multiple oblique scanning angles are used.
[0044] Since there are multiple slant scan angles, when step 2 in the first embodiment is performed, it is necessary to confirm the pre-slope scan area corresponding to each logical touch point at each slant scan angle. When step 3 is performed, the union of the pre-scanning areas of each logical touch point at each slanting angle is determined, and it is used as the current slanting area of the slanting angle, such as Figure 8 to Figure 10 . When performing oblique scanning in step 4 to identify the real touch point, perform oblique scanning at each oblique scanning angle. After scanning all oblique scanning angles, comprehensively judge the logical touch point according to the scanning results of each oblique scanning angle. real touch points.
no. 3 example
[0045] The third embodiment: In this embodiment, the second embodiment is further optimized. There are also multiple oblique sweep angles in this embodiment. Different from the second embodiment, the process of performing steps 2 to 4 is as follows:
[0046] First, determine the current slant scan area of one of the slant scan angles, scan each logical touch point at this slant scan angle, and do not need to judge the scanning range of other slant scan angles, and then Exclude part of the wrong logical touch points from the scan results; use the remaining logical touch points as the basis for determining the current slant scan area of the next slant scan angle, that is, the remaining logical touch points after exclusion are in the pre-scan area of the next slant scan angle The union of is used as the current slant sweep area for the next slant sweep angle. Perform oblique scanning on each of the remaining logical touch points in the oblique scanning area, and eliminate w...
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