How do touch sensitive screens work

The touch screen is one of the simplest PC interfaces to use, for a larger number of applications. A touch screen is useful for easily accessing the information by simply touching the display screen. The touch screen device system is useful in ranging from industrial process control to home automation. In real-time by simply touching the touch screen and with a graphical interface, everyone can monitor and control complex operations.

At the transmission end using a touch screen control unit, some directions will send to the robot for moving into a specific direction like forwarding, backward, rotating left, and rotating right. At the receiving end, four motors are interfaced with the microcontroller.

Two of them will be used for Arm and grip movement of the robot and the other two are used for body movement. Some remote operations can be done with touch screen technology using wireless communication for answering calls, locating and communicating with staff, and operating vehicles and robots.

For this purpose RF communication or infrared communication may be used. It is possible to control the electrical appliances at home using touch screen technology. The whole system works by sending input commands from the touch screen panel through the RF communication which are received at the receiver end and control the switching of loads. At the transmitter end, a touch screen panel is interfaced with the Microcontroller through a touch screen connector.

When an area on the panel is touched, the x and y coordinates of that area are sent to the Microcontroller which generates a binary code from the input. This 4-bit binary data is given to the data pins of the H12E encoder which develops a serial output.

This serial output is now sent using an RF module and an antenna. At the receiver end, the RF module receives the coded serial data, demodulates it and this serial data is given to the H12D decoder. This decoder converts this serial data into parallel data which pertains to the original data sent by the microcontroller at the transmission end.

The microcontroller at the receiver end receives this data and accordingly sends a low logic signal to the corresponding optoisolator which in turn switches on the respective TRIAC to allow AC current to the load, and the respective load is switched on. The applications of touchscreen technology include the following.

And also, some high-end Google Chromebooks use touch screens. Thus, this is all about an overview of touchscreen technology. The main reasons to choose this technology instead of physical buttons by the manufacturers are; these are instinctive, particularly to younger generations of users. By using this technology, the devices can make smaller. The design of these devices is cheaper. Follow her on Twitter. On an iPhone touch screen, how can it detect and locate two fingers at once?

Or even three? If a charge is passed to the finger, please can you let me know what the current and voltage is. Thanks, I have Carpal tunnel and am curious if the screen can affect it. Your email address will not be published.

Previous Search. Ever Wondered? Okay, but how do touch screens actually work? Resistive These are the most basic and common touch screens, the ones used at ATMs and supermarkets, that require an electronic signature with that small grey pen. This is what makes resistive screens work — two electrically conductive layers bending to touch one another, as in this picture: Resistive touch screen technology [Image Credit: Chassis Plans ] One of those thin yellow layers is resistive and the other is conductive, separated by a gap of tiny dots called spacers to keep the two layers apart until you touch it.

Capacitive Unlike resistive touch screens, capacitive screens do not use the pressure of your finger to create a change in the flow of electricity. Sizing Up Newer touch screen technologies are under development, but capacitive touch remains the industry standard for now.

Filed To capacitive resistive swipe touchscreen. The AC currents in touchscreens are within levels for natural charge conduction in our bodies — and the true revolution and utility of modern touchscreens lies in the rapidity of their responses. With a little cooperation between man and machine, touch-sensitive screens have opened the doors to a host of new interactive technologies.

How do electricity transmission lines withstand a lifetime of exposure to the elements? Can we make robots that experience emotions? Maybe you or a friend or family member has a smartphone with a touch screen? Perhaps you have a tablet computer or an e-reader with a touch screen. How about a GPS device in your car? Touch screens can even be found on various things around your town, such as video rental machines, automatic teller machines, and even soda machines in some restaurants.

Put on your thinking cap and make a list of all the touch screens you can think of that you're had a chance to touch in the past day, week, or month! How many can you come up with? Get some practical experience with a touch screen.

If you don't own a smartphone with a touch screen, borrow one from a friend or family member. Try out the different applications on the smartphone. Which ones are easy to use with the touch screen? Are any of the games difficult to play with the touch screen?

Does the touch screen work like you thought it would? Why or why not? How sensitive is it? Do you have to actually press on the screen or is the lightest touch enough? How would you improve the touch screen if you could? Share your thoughts with a friend or family member. Up for a challenge? Are you ready to invent the greatest invention ever? Sure, touch screens are really cool.

But they're everywhere these days. If you want to be the next Steve Jobs , you're going to have to think outside the box. Don't worry, though. We've got a great idea already. We just need you to do the hard work to bring it to life. What is it? The smell-o-vision, of course! Televisions have been around for a long time now. We have touch screen televisions, high-definition televisions and even 3D televisions.

Today's various televisions are a delight for the eyes, the ears and even the fingers. But not the nose! You've probably never thought of that, have you? When you watch a cooking show on television, wouldn't it be great if you could smell what's cooking? We'd watch The Bacon Channel non-stop!

Or what about shows about gardening? Of course it would! How would you go about developing the smell-o-vision? What might it look like? How would you convince people to buy it?

What television shows would be even better on a smell-o-vision? What shows might NOT be so great? Put your thoughts into writing and even add in some illustrations of what your creation might look like.

Email us what you come up with. Did you get it? Test your knowledge. What are you wondering? Wonder Words touch screen current display technology burden electronic visual transmission information capacitance stylus surge resistive kiosk metallic Take the Wonder Word Challenge.

Join the Discussion. MEME Feb 13, Feb 17, Yeah, but touch screens and mouse pads already built-in are NOT good for gaming. Trust me. Feb 12, Thanks for sharing your experience, whoever you are. In case you have not noticed, you've fallen right into my trap, Wonderopolis. WonderBoi May 20, Just Wondering ;. May 21, Yaboi Mar 6, Mar 6, Are you a computer Mar 27, Mar 27, Dev Mar 27, Glad you liked it, Dev! It's fun to learn how our everyday technology works!

David Mar 23, Now i got clear picture about how touch technology works. Great information, and this is my request to please write an article about multi touch technologies. Companies like nextgen multi touch, intuilab, nuiteq has developed great multi touch software's.

I'm keen to hear from you. Thanks a lot. Mar 23, David Mar 24, Mar 24, Aaron Nov 29,