Top and Different Types of Touchscreen Technology

Today’s technology is very vast if we talk about the personal device assistant. Frank Beck and Bent Stumpe developed the transparent touchscreen in 1970s and now all the mobile phones use the advanced technology of touchscreen.

What is touchscreen technology?

A touchscreen is an electronic visual display that the user can control through a single or multiple touches. It enables the user to interact directly with the data displayed on screen. All the devices such as game console, Smartphones, tablet and touch computers use the touch screen. There are many touchscreen technology and they have different sensing touch.

Advantages and Disadvantages of touchscreens

All the touchscreens have some advantages. The resistive screens are very popular for being very cheap. On a very cold day the user wearing gloves fails to use capacitive screen. For this reason the resistive screen is more appropriate. On the other hand the capacitive screen is popular for the image quality and fast response. Another advantage of capacitive over resistive screen is brightness. The infrared touchscreen has the advantage of simplicity. But it has many drawbacks such as it is very expensive and very sensible to dirt. Let’s elaborate them.
Touchscreen technology is of four types. Here’s my list on Top and Different Types of Touchscreen Technology.

4. Surface Acoustic Wave

Rayleigh wave 1Photo credit: Wikimedia commons

The Surface Acoustic Wave uses the ultrasonic waves and containing two transducer one for transmitting and another for receiving. The waves propagate across the glass and are reflected back to the sensor. When the touchscreen panel is touched the ultrasonic waves is absorbed. It provides excellent image quality as there is no metallic layer present on the screen. It can be operated using stylus, gloves and finger but it get easily contaminated by exposure to dirt.

3. Infrared

The Infrared touchscreen technology contains an array of X-Y IR LED and photo detector around the edges. The beams of LED cross each other horizontally and vertically and this helps the sensor to find the exact position on the screen. When the user touches the screen the photo detector detects the change in the light emitted by the Lord. It has the great advantage that it can detect any input including finger with resistive matter such as gloves. It is widely used in many applications such as ATM, Food service and medical instrumentation.

2. Resistive

TouchScreen resistivePhoto credit: Wikimedia commons

The resistive touchscreen is very popular because it can detect any input include pen, pencil, nail or finger. The resistive touchscreen consists of many layers. The uppermost layer is flexible made of polyethylene and the bottom rigid layer is made of glass. Both the layers are coated with Indium Tin Oxide. When the user touches the screen the upper layer presses down and touches the lower layer. The change in the electric current detected and the position is calculated through the controller. Some of the popular electronic devices use this technology like Nokia N97, Nokia 5233, Nintendo DS and HTC tattoo.

1. Capacitive

TouchScreen capacitive 1Photo credit: Wikimedia commons

Also read: Upcoming Screen Less Display Technology

The capacitive touchscreen technology is more popular all over the world. The touchscreen panel coated with a transparent conductor such as Indium Tin Oxide. When the screen is touched it creates the electrostatic field and the screen reacts by sending the information to the touchscreen controller. This technology is divided into four categories-Surface capacitance, Projected capacitance, Self capacitance and Mutual capacitance. Now the manufacturer trying to develop a thinner touchscreen than the Samsung’s super AMOLED in which the capacitors build inside the screen. All the Smartphones such as iPhone, Samsung Galaxy, HTC uses the capacitive touchscreen.

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