A method for realizing multi-point real touch on a surface acoustic wave touch screen
A surface acoustic wave and real touch technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve problems that affect the recognition of coordinate points by the firmware system and cannot produce surface acoustic wave touch screens, etc.
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Embodiment 1
[0105] A method for realizing multi-point real touch on a surface acoustic wave touch screen, comprising the following steps:
[0106] (1) Set at least one set of transmitting transducer array 4 formed by multiple transmitting transducers 6 on the X-axis or Y-axis, or at least set one set of receiving transducer arrays formed by multiple receiving transducers 2 device array 5;
[0107] (2), the transmitting transducer 6 is driven by the transmitting circuit to transmit the surface acoustic wave signal, and the receiving circuit controls the receiving transducer 2 to receive the surface acoustic wave signal;
[0108] (3) When touched by a touch object, the surface acoustic wave signal reaches the receiving transducer 2 after passing through the touch object. When the strength of the surface acoustic wave signal is greater than the set threshold, the receiving circuit sends the surface acoustic wave signal to the central processing unit MCU, the central processing unit MCU dete...
Embodiment 2
[0122] This embodiment is basically the same as Embodiment 1, the main difference is that a set of transmitting transducer arrays 4 is set on the X axis, a set of receiving transducer arrays 5 is set on the Y axis, and any transmitting transducer array 5 6, the transmitting circuit drives the transmitting transducer 6 to emit the surface acoustic wave signal in turn, until all the transmitting transducers 6 are driven once, and then ends a cycle; the receiving circuit controls all the receiving transducers 2 to receive simultaneously The surface acoustic wave signal, or all the receiving transducers 2 are controlled by the receiving circuit to receive the surface acoustic wave signal separately in turn; the above-mentioned setting method is preferred, but not limited to the above-mentioned preferred setting method, for example, a group of transmitting transducers can be set on the X axis Transducer array 4, two groups of receiving transducer arrays 5 are arranged on the Y axis....
Embodiment 3
[0133] This embodiment is basically the same as Embodiment 2, the main difference is that a group of transmitting transducer arrays 4 is arranged on the X axis, and a single receiving transducer 2 and a reflective stripe array 3 are arranged on the Y axis. Combination, starting from any transmitting transducer 6, the transmitting circuit drives the transmitting transducer 6 to emit the surface acoustic wave signal in turn, until all the transmitting transducers 6 are driven once, then ends a cycle; controlled by the receiving circuit The receiving transducer 2 receives the surface acoustic wave signal; the above-mentioned arrangement is preferred, but not limited to the above-mentioned preferred arrangement, for example, two groups of transmitting transducer arrays 4 can be respectively arranged on the two sides of the X-axis, and on the Y-axis Two combinations formed by a single receiving transducer 2 and a reflective stripe array 3 are arranged on the two sides of each.
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