Gain time-varying sound wave contact panel system and its control method
A control method and a technology of a gain control circuit, which are applied to a time-varying gain acoustic wave contact plate system and its control field, can solve the problems of being unsuitable for large-scale structures and inconvenient use, and achieve convenient application, simple implementation, and reduced mechanical design the effect of the requirements
Inactive Publication Date: 2009-06-24
骆航 +2
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[0003] Aiming at the disadvantages of the above-mentioned acoustic wave contact plate device in the prior art that the amplification gain value is fixed, it is inconvenient to use, and it is not suitable for making a large-scale structure, the present invention provides a new acoustic wave contact plate system, whi
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[0033] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.
[0034] In this embodiment, the present invention is specifically described by taking two sets of corresponding transmitting transducers and receiving transducers as an example, in order to illustrate the principle and working method of the gain control circuit. In specific implementation, multiple sets of The difference between the transmitting transducer and the receiving transducer is that the number of groups of the transmitting transducer installed on the substrate 100 increases, the corresponding preamplifier increases, and the signals output by the multi-channel receiving transducer correspond to it. After the preamplifier is amplified, the signal is input to the main amplifier for amplification in time-sharing, or the signal output by the mu...
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The invention discloses a system for an acoustic-wave contact plate and a control method thereof, in particular to a system capable of contacting with position coordinates and changing gains in real time, and a method thereof. The system adopts the gain control, thereby being capable of changing the amplification gain of the amplifier in real time during a receiving cycle so as to meet the requirement for the amplification gain by the output signals of a receiving transducer at different times during a receiving cycle, and enable the output signals to be relatively level after the detection is conducted. The invention realizes the approximate level by changing the amplification gain of the amplifier in real time, and has the advantages that the manufacturing cost is low, the realization is simple, the requirement of the mechanical design of the acoustic-wave contact plate is reduced, and the application in a large-scale acoustic-wave contact plate can be conveniently realized.
Description
Technical field [0001] The invention discloses an acoustic wave touch panel system and a control method thereof, in particular to an acoustic wave touch panel system and a control method involving time-varying gains of contact position coordinates. Background technique [0002] The sonic touch panel device can be used in many fields. The more common applications are on computers, televisions, game consoles and various special equipment. As a human-to-machine input interface, it can input similar buttons, lines, graphics , text and other information, in the patent No. CN86102275A document, the main technology of the existing touch panel is introduced. There are also many ways to implement the acoustic wave contact plate device, please refer to the attached figure 1 , figure 1 It is one of the more common sonic touch panel devices, which are generally installed on the surface of the display screen of the computer and can be used for input of coordinates, text, graphics and o...
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Inventor 骆航
Owner 骆航