Mobile device Design: Features and limitations of various touch screens

Article Description: All kinds of touch screen big competition

Capacitive, resistive, infra-red .... Whatever the style, although perhaps the fingers of your readers have been accustomed to rowing on the screen, but the earliest know that there is such a screen can be manipulated by touch, will it be as surprised as the author?

Now with the help of the following figure, let's take a look at all kinds of touch screen features, but also what limitations.

Resistive touch-screen representative model is Samsung Messager TOUCH,HTC touching Diamond, and so on. This screen is composed of multilayer materials, when the touch screen surface under pressure, the top layer and the bottom contact, resulting in the corresponding electrical signals to change the current, through the operation to determine the location and complete the corresponding operation.

Capacitive touch screen is the most iphone,htc hero and BlackBerry Storm and other models. When the finger touches the screen, the human electric field causes the finger and the screen to form the coupling capacitance, the current from the capacitance screen Four corners of the electrode flow out, obtains the position by the precise calculation.

Samsung U600 and other uses the infrared touch screen, which is divided into heat-sensitive and two kinds of optics. When using a thermal screen, you need to touch the screen with objects of a certain temperature. The optical touch screen is the use of sensors, through the invisible beam to divide the screen into many small grids, according to the horizontal and vertical axis to calculate the touch position.

In terms of cost, the most expensive is obviously the infrared touch screen, the first two are cheaper.

Resistance screen needs multi-layer material composite, capacitance screen and infrared screen are generally glass material, which means durability, it is clear that the glass material capacitance screen and infrared screen better, resistance screen durability relative to some.

Resistance screen and infrared screen input conditions are relatively loose, fingers, gloves and pens can be, thermal screen needs warm fingers, this is a bit embarrassing, winter swollen mody do? and capacitive screen obviously can only touch with the finger, even if the screen to cut with a pen, the system will not have hits sour reaction.

Resistance screen in the outdoor visual effect is worse, the latter two relatively good, but for the optical screen, outdoor glare will affect the accuracy of the screen.

Resistive screen does not support multi-touch, the latter two support.

How, after the above analysis, on the general situation of several screens have understood it. I have to take this article to my mother to take a good look, lest her old people always with a pen to the screen jab, while still puzzling to ask me, the screen how bad, why your father's mobile phone can I do not? My mother alas, that is because you use the capacitive screen!

This article is compiled from Lei Feng net from thenextweb, if there is no such note, are original.