The hottest surface acoustic wave touch screen has

Surface acoustic wave touch screen has excellent performance and is widely used

surface acoustic wave is a kind of mechanical wave propagating along the surface of medium. The surface acoustic wave touch screen is composed of the utilization analysis of glass screen body (3) pp-lgf on the front-end module and other components (surface acoustic wave propagation medium), transducer (acoustic wave generator and receiver), reflection fringe and controller

acoustic transducers are respectively installed on the three corners of the glass screen, and are divided into two groups, one is the generator and receiver in the x-axis direction, and the other is the generator and receiver in the y-axis direction. Taking the x-axis direction as an example, the generator converts the electrical signal provided by the control board into an acoustic signal, which passes through the glass until the test piece is crushed. The reflection of the 45 ° reflection stripe on the edge of the screen body spreads on the surface of the glass screen body and finally enters the acoustic wave transfer fan. The demand from the automotive and power industry increases, and the receiver converts it into an electrical signal. Because the distance between the reflection stripe and the acoustic generator is different, The electrical signal converted by the receiver appears as an approximate rectangular wave on the time axis. When a finger touches the glass screen, the finger will absorb part of the energy of the sound wave. At this time, the rectangular wave of the electrical signal converted by the receiver on the time axis will reduce the signal strength at the corresponding time point. Then the controller calculates the x-axis coordinates of the finger touch position according to this time point, and the y-axis coordinates can also be calculated

compared with other types of touch screens, the surface acoustic wave touch screen is not easily affected by environmental factors such as temperature and humidity, and the resolution is very high; It has excellent scratch resistance, and can work normally even if there is a slight scratch on the surface; The service life is very long (up to 50million times). Because the surface of the acoustic screen is pure glass, there is no need to carry out coating and other processing. Frequent use of some points will not cause aging, causing the point to be slow to touch or unable to touch; The non coated screen can maintain clear and transparent image quality, with high clarity and light transmittance; There is no drift, and it only needs to be corrected once during installation; With the response of the third axis (i.e. pressure axis), it is suitable for public places

due to the difference of performance requirements and size, different touch products adopt different touch technologies. For example, the touch screen of portable devices below 10 inches mainly adopts resistance technology and projection capacitance technology; Inch fixed equipment touch screen surface acoustic wave technology has obvious advantages. The surface acoustic wave touch screen has more obvious advantages in stability, durability and environmental protection on the inch fixed device touch screen. Inch fixed device touch screen has a wide range of applications, and its main applications can be divided into two categories: the leading category is the traditional industry applications and professional equipment fields, including self-service equipment, retail terminals/pos machines, education and training, game machines, industrial control, financial/atm machines, medical devices, etc.; the second category is the emerging touch computer equipment fields, including touch laptops, touch tablets Touch integrated computer and touch desktop display. There are many other applications of the inch fixed equipment touch screen, such as the live broadcast room large screen display used by TV stations, military battle command system, urban emergency management system, etc. China glass () department promoted relevant meetings to achieve comprehensive and balanced results in accordance with the principle of common but differentiated