Since the appearance of the first electronic touch screen in 1971, the field of touch has experienced rapid development, and various touch technologies have emerged, including resistance, infrared, optical imaging, projected capacitors, and surface acoustic waves. The ongoing touch craze worldwide will also bring more new touch technologies. Therefore, how to choose the right touch technology is a huge challenge faced by various application manufacturers, especially in the field of automotive touch applications. Engineers in the field of automotive touch applications can use the elimination method to find suitable touch technology. Although resistive touch screens have been used in car GPS long time ago, they have been plagued by shortcomings such as short working life, poor light transmittance, affecting display quality, and easy touch drift. After a long period of development, infrared and optical image touch technologies still occupy leading positions in the large-size touch market. However, in cars driving outdoors, the inevitable sunlight exposure can almost invalidate the infrared and optical touch screens that work on the infrared blocking principle. In addition, the large frame inherent in their structure also poses a huge challenge to vehicle integrated assembly. . Projected capacitive touch technology has achieved tremendous success in consumer markets such as smartphones and tablet PCs, but it also faces many challenges when applied to automotive touch. First of all, for capacitive touch screens that rely on electrical principles, in automotive applications with complex electromagnetic environments, they cannot resist interference from electromagnetic noise from other electronic components in the vehicle. Although the signal-to-noise ratio can be improved to a certain extent through shielding measures or design improvements, the problem cannot be solved 100%, and it will also bring a sharp rise in cost. In addition, the capacitive screen is composed of multiple layers of transparent conductive (ITO) film. In the extreme high and low temperature impact in the car, it may cause structural delamination or changes in the characteristics of conductive materials, resulting in touch failure. The solution to this problem must rely on long-term innovations in processes and materials. Surface acoustic wave is one of the few touch technologies that have been recognized by the military and have been successfully applied to armored vehicle projects. It has been widely used in outdoor or public self-service equipment such as ATMs and ticket vending machines for a long time. Proof. Its working principle is based on a mechanical wave with a certain frequency transmitted on the shallow surface of the glass. This mechanical wave is basically immune to the complex electromagnetic environment in the car, and the touch performance is not affected at all; the surface acoustic wave screen is only made of pure glass , Transducer, wire and control card are composed of very few components and have extremely high reliability; without being deliberately destroyed, the surface acoustic wave touch screen can work stably for more than ten years, which is consistent with the life of the car. In addition, surface acoustic waves also have the natural properties of supporting curved surfaces and non-rectangular shaped touch structures, which helps car manufacturers to design innovative applications for in-vehicle touch applications. Although the current application cases of surface acoustic wave touch screens in passenger cars are relatively few, but with the joint efforts of touch technology manufacturers and vehicle manufacturers, surface acoustic wave touch screens will surely become one of the main technologies in the field of vehicle touch applications in the future. Digital Printing Graphic Overlay Digital Printing Graphic Overlay,Membrane Switches Graphic Overlays,Membrane Switch Panels ,Membrane Switch Button CIXI MEMBRANE SWITCH FACTORY , https://www.cnjunma.com