Archive for the 'Touch Screen LCD Monitor' Category
Using infrared (IR) light pens and the Wii Remote, it is possible to create very low-cost multi-point interactive whiteboards and multi-point tablet displays. Johnny Chung Lee, Carnegie Mellon University. The software can be downloaded at johnnylee.net.
Touch screen LCD monitor – how does it work?
Touch screen monitors are a device by which we give inputs and take outputs as information without using any other external device. Instead of using a keyboard or mouse.
A touch screen is a display which can detect the presence and location of a touch within the display area. The term generally refers to touch or contact to the display of the device by a finger or hand. Touch screens can also sense other passive objects, such as a stylus.
The touch screen has two main qualities. First, it allows you to interact with what is displayed directly on the screen, where it is displayed, rather than indirectly with a mouse (computing) or touchpad. Secondly, it lets one do so without requiring any intermediate device, again, such as a stylus that needs to be held in the hand.
Touch screen monitors are used in a variety of different applications including POS (point of sale) cash registers, PDA’s (personal digital assistants), ATM’s, car navigation screens, cell phones, gaming consoles and any other type of appliance that requires you to input and receive information.
Types of technology available in Touch Screen. The commonly used are underneath:
- Resistive Touch monitors
A resistive touch screen monitor usually has a coat of very thin electrically conductive and resistive layer of metal. When pressed, the change in electrical current can be measured and the input processed by a computer. While very affordable they only offer about 75% clarity, they can also be easily damaged by objects that are sharp. Resistive touch screen monitors are the most popular types of touch screen monitors used today. They are usually not effected by dust or liquids which make them very reliable.
- Surface Wave Touch Screen Monitors
Surface wave touch screen monitors use ultrasonic waves to process inputs from the screen. Ultrasonic waves flow over the touch screen, when a person touches the pad at a specific location, the wave is absorbed and immediately processed by the computer. While not as common as resistive touch panels, they are used in certain applications. Dust and water can contaminate a surface wave touch screen so it is important to keep the screens properly maintained.
- Capacitive Touch Screen Monitors
Capacitive touch screens are coated with indium tin oxide. This material provides a continuous current across the screen. The current is precisely controlled throughout the touch pad and can be measured by the computer processor, when touched; the screen is able to send the processor specific coordinates to input information correctly. It is important to note that specific objects can only be used on capacitive touch screens. You can not use a stylus or a pencil for instance; usually you will need a bare finger. Capacitive touch screens have high clarity and are not affected by dust or liquids.
- Infrared Touch Screen Monitors
There are two types of Infrared touch screen monitor screens, the first reacts to infrared or thermal waves (heat), unfortunately this technology is slow and does not work well with cold hands or objects. The second type of Infrared touch screen monitors use vertical and horizontal infrared sensors around the perimeter of the touch screen. Creating a grid, the touch screen is able to pinpoint the exact location of where the screen has been touched and send that information to the computer for processing. Infrared touch screen monitors are very durable and are used for industrial and military applications.
Students from the University of Duisburg, Essen, have created a poker game for the Microsoft Surface. We all know Windows 7 and Windows Mobile software both support touch screen technology. But nothing is as impressive as their Microsoft Surface.
This touch screen software combines the multi-touch Surface capabilities and mobile phones. Players can look at the cards on their mobile phones. Or hide them by tilting the phone.
Chips and cards can be moved by your finger and there are a few cool poker related gestures.
- Tapping the table is used for the call action.
- Tapping on the card turns it around and shows it.
- Tapping the chips splits them to smaller chips and holding your finger over a group of chips for a second, merges them into a single chip.
- Folding (and laying the cards on the table) is done by shaking the phone horizontally.
It also allows rotation of cards and chips, as expected from a multi-touch technology.
It may not be the most practical or the cheapest solution (compared to a pack of cards, for example). However, the concept itself is simply amazing from the touch screen software perspective, introducing some fresh and innovative gestures like tilting and throwing.
Check out the video:
Blogroll – Cool Sites
- Touch Screen Applications from Corel on
- How to Build Your Own Touch Screen Software on
- How to Build Your Own Touch Screen Software on