precautions while using touch screen mobile

Surface acoustic wave(SAW) technology also usesultrasonicwaves that pass over the touchscreen panel. When the panel is touched, a portion of the wave is absorbed. This change in the ultrasonic waves registers the position of the touch event and sends this information to thecontrollerfor processing. Surface acoustic wave touchscreen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen

Unlike aresistive touchscreen, one cannot use a capacitive touchscreen through most types of electrically insulating material, such as gloves. This disadvantage especially affects usability in consumer electronics, such as touch tablet PCs and capacitive smartphones in cold weather. It can be overcome with a special capacitive stylus, or a special application glove with an embroidered patch of conductive thread passing through it and contacting the users fingertip.

In this basic technology, only one side of the insulator is coated with a conductive layer. A smallvoltageis applied to the layer, resulting in a uniform electrostatic field. When aconductor, such as a human finger, touches the uncoated surface, acapacitoris dynamically formed. The sensorscontrollercan determine the location of the touch indirectly from the change in thecapacitanceas measured from the four corners of the panel. As it has no moving parts, it is moderately durable but has limited resolution, is prone to false signals from parasiticcapacitive coupling, and needscalibrationduring manufacture. It is therefore most often used in simple applications such as industrial controls andkiosks.

Projected Capacitive Touch (PCT; also PCAP) technology is a variant of capacitive touch technology. All PCT touch screens are made up of a matrix of rows and columns of conductive material, layered on sheets of glass. This can be done either byetchinga single conductive layer to form a grid pattern ofelectrodes, or by etching two separate, perpendicular layers of conductive material with parallel lines or tracks to form a grid. Voltage applied to this grid creates a uniform electrostatic field, which can be measured. When a conductive object, such as a finger, comes into contact with a PCT panel, it distorts the local electrostatic field at that point. This is measurable as a change in capacitance.

The primary reasons for the popularity of the touchscreen are the large screen and clear images. It feels comfortable to the eyes and users no longer have to strain to read a message. The size of the screen and the LCD technology that comes with it have made it easy to view images and videos. The quality of cellular entertainment has taken a huge step forward, thanks to touchscreen cell phones.

Touchscreen phonesvary in screen size, height, weight, and display resolution. These attributes determine the design of the phone and the viewing experience it offers to users. Mosttouchscreen phoneshave simple user interfaces that make it easy for users with any level of technical knowledge to operate them. These phones are intuitive and only require a little common sense. Though it can be daunting at first for users who are accustomed to keyboards and buttons, it is easy to learn with a little practice. Users will be surprised to see how adept they have become in maneuvering through their cell phone with only the fingertips. Another advantage of touchscreen cell phones is the ease of navigation.

Most touchscreen phones use sensors and complex circuitry to identify the action of a user. Based on this input, the phone provides an appropriate response. Some phones (theiPhone, for example) monitor the electric current while others use sound or infrared waves or vibrations to identify the actions. Despite these variations, most touchscreen cell phones give the right response to the user.

Touchscreen technology has come a long way since it was first introduced in 2007 by the originalApple iPhone. After its runaway success, other manufacturers started introducing their versions of the touchscreen, and today, this market is extremely crowded.

From a design perspective, most people prefer a touchscreen that has a high display resolution so that pictures and videos are crisp and clear. However, not all phones offer high resolution touchscreens because of limited processor speed and capability. So, if a user is looking for high resolution phones, his or her best options are smartphones made by companies likeApple,HTC,Motorola, andSamsung.

Other aspects to consider while choosing a touchscreen cell phone are battery life, standby time, operating system, memory capacity, processor speed, expandable memory, and the built in features that come with the phone. Each of these attributes has a role in the cell phones efficiency and capability. For example, a phone with a higher processor speed and memory is capable of handling more operations, and users can enjoy a finer resolution. The availability of built in features, such as YouTube, Facebook, and Twitter, make it that much easier for the user to stay connected with the rest of the world. Higher resolution touchscreen cell phones with a larger memory and processor speed make it a breeze to flip through photos, stay ahead of the latest updates in the social media world, watch videos, and navigate the Internet.