What is the difference between a single touch screen and a multi-touch screen

- Mar 01, 2019-

We hear a lot about single touch screens and multi-touch screens. What's the difference?What is a single touch screen and what is a multi-touch screen?

Single touch screen

The development of touch screen functions from simple and complex, the original products only support the simplest operation [LU4] control, is a finger touch on the screen to achieve control.For example, we operate the POS terminal in the supermarket or the check-in terminal in the airport every day.Previously, we could only control the screen through the mechanical buttons around the screen, a single touch screen on this basis to achieve a major improvement in user interface.Of course, mechanical and new capacitive touch-sensitive buttons are ubiquitous in our homes, offices and other places: mobile phones, landlines, remote controls, televisions, computers and their peripherals, game machines, refrigerators, microwaves, ovens, and in-car electronic controls such as radios and air conditioners.Now, as shown in figure 1 below, the single-touch screen integrates directly with the user control interface on the display, eliminating the need for traditional mechanical buttons.

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This kind of screen brings two major benefits to the user interface. First, the device design space is optimized, especially for small devices, because they can "install" the screen and buttons in the same area at the same time.Second, because the button can be tied to any application in the operating system, the device can use an infinite number of "buttons".The above functions are mainly based on the resistive touch screen technology and have been widely promoted in various applications such as consumer electronics, airport newsstands, grocery store POS terminals and onboard GPS systems.

Although the technology of single-point touch screen and resistive touch screen is surprising and revolutionary, it still has two major disadvantages. One is that the resistive technology relies on the physical movement of the touch screen [LU5]. Although the influence [LU6] is small, the performance will decline after normal wear and aging.The second is that the technology only supports a single touch, which means you can only use one finger at a time to do a single action in a certain area of the screen.Why is user interaction with the device limited to one finger?Apple contributed immeasurably to the user interface revolution, introducing the iPhone with an inductive capacitive touch screen.Even in miniaturized devices such as smart phones, multiple fingers are needed to maximize application and operating system functionality.

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Multitouch screen - identifies finger position

Like single-touch screens, multitouch screens that recognize finger directions have a limitation: the technology can identify only a limited number of operating points simultaneously on the screen.Why can only two operation points be identified at a time?The user's two hands have ten fingers, and when users interact with each other, more fingers appear on the screen.This is where the multi-touch concept of finger location, which allows for more than two fingers of control, comes in.The technology, which Cypress calls "multi-touch, full-area input," further enhances the reliable availability of touch screens for a variety of feature-rich applications.Essentially, multi-touch, district-wide input technology gives oems of devices and systems all the touch data at their fingertips, helping them get creative and develop the next generation of new, practical technologies.