Day-by-day increase in popularity of touch screen devices also makes people aware of the different types of touch screen. The difference between various kinds of touch screen comes to know by the difference of touch response. There are basically three types of touch screens which is the main reason of differences. Capacitive touch screen is one of them.
Capacitive Touch Screen Mechanism
Capacitive sensors are used to detect the position of touch. Capacitive touch screens are designed to sense the human touch. To better understand the mechanism of capacitive touch screen it is better to know the chemistry of human body first. Human body is made up of many cells with electrons moving in it so human body has an electric charge on it. Therefore a man at the time of loosing heart beat is given electric shock.
In capacitive touch screen, glass panel of a particular device is covered with capacitive layer with static charge. When we touch finger on the screen some of the charge shifts from device to the finger. This decreased charge is noticed by the system. The system processed the information to the OS which tells the exact location of touch.
Capacitive Touch Screen Uses
Resistive touch screen is the already using in heavy industries and now in commercial zone but now capacitive touch screen is also creating its place. The reason is that capacitive touch screen gives clearer picture than resistive. It is used in the displays of computers, mobiles, laptops, iPods and other electronic devices. Touch screen switch boards has been designed instead of mechanical switches and compact MP3 and improved versions are now touch screen incorporated.
Advantages and Disadvantages of Capacitive Touch Screen
A special feature of capacitive touch screen is that it is only responsive to the human touch. In case of any outer touch it does not response. It facilitates to clean the screen with the help of fabric. No unintended command does not harm the screen and does not create hazard to the applications. It gives comparatively better image as compared to resistive touch screen.
Capacitive touch screen gives good response this is because they are acute observer of the slight touch. They are finely tuned to any type of conductive material. Resistive touch screen is made up of three layers which results in bad image but capacitive is thin layered glass screen and able to give comparatively sharp image but even then not as sharp as of Acoustic wave touch screens.
A disadvantage of capacitive touch screen lies inside in its advantage. Where human touch makes work easy and quick on small and standard sized appliances there it becomes problem on a wide screen or if it is placed at higher place. Like it is not suitable for projectors because you cannot use hand everywhere and it becomes difficult to explain a higher point on the projector where your hand is not able to reach.
It is not operate able even with stylus until up till it is of conductive material. If you are wearing gloves for capacitive touch screen you have to remove it. Also if you want to work speedily with the pencil in your hand not to waste time in first placing it on the table for the screen use and then again pick up you just get exhaust and fed up with this fatigue. If your finger is wet again it fails to detect the touch.
One more disadvantage of capacitive touch screen not in a particular sense though, it is expensive. On one side the resulting image is not perfect while on the other side offer high pricing which hinders it making a niche market. They offer less durability hence short life is another drawback.