| 1> | | | | monitors are the most popular types of touch screen |
| | | | monitors used today. They are usually not effected by |
| Touch screen monitors are a device by which we | | | | dust or liquids which make them very reliable. |
| give inputs and take outputs as information without | | | | Surface Wave Touch Screen Monitors |
| using any other external device. Instead of using a | | | | Surface wave touch screen monitors use ultrasonic |
| keyboard or mouse. A touch screen is a display which | | | | waves to process inputs from the screen. Ultrasonic |
| can detect the presence and location of a touch within | | | | waves flow over the touch screen, when a person |
| the display area. The term generally refers to touch or | | | | touches the pad at a specific location, the wave is |
| contact to the display of the device by a finger or | | | | absorbed and immediately processed by the |
| hand. Touch screens can also sense other passive | | | | computer. While not as common as resistive touch |
| objects, such as a stylus. TOPIC: - | | | | panels, they are used in certain applications. Dust and |
| Touch screen monitors are a device by which we | | | | water can contaminate a surface wave touch screen |
| give inputs and take outputs as information without | | | | so it is important to keep the screens properly |
| using any other external device. Instead of using a | | | | maintained. |
| keyboard or mouse. | | | | Capacitive Touch Screen Monitors |
| A touch screen is a display which can detect the | | | | Capacitive touch screens are coated with indium tin |
| presence and location of a touch within the display | | | | oxide. This material provides a continuous current |
| area. The term generally refers to touch or contact to | | | | across the screen. The current is precisely controlled |
| the display of the device by a finger or hand. Touch | | | | throughout the touch pad and can be measured by the |
| screens can also sense other passive objects, such | | | | computer processor, when touched; the screen is able |
| as a stylus. | | | | to send the processor specific coordinates to input |
| The touch screen has two main qualities. First, it allows | | | | information correctly. It is important to note that specific |
| you to interact with what is displayed directly on the | | | | objects can only be used on capacitive touch screens. |
| screen, where it is displayed, rather than indirectly with | | | | You can not use a stylus or a pencil for instance; |
| a mouse (computing) or touchpad. Secondly, it lets one | | | | usually you will need a bare finger. Capacitive touch |
| do so without requiring any intermediate device, again, | | | | screens have high clarity and are not affected by dust |
| such as a stylus that needs to be held in the hand. | | | | or liquids. |
| Touch screen monitors are used in a variety of | | | | Infrared Touch Screen Monitors |
| different applications including POS (point of sale) cash | | | | There are two types of Infrared touch screen monitor |
| registers, PDA's (personal digital assistants), ATM's, car | | | | screens, the first reacts to infrared or thermal waves |
| navigation screens, cell phones, gaming consoles and | | | | (heat), unfortunately this technology is slow and does |
| any other type of appliance that requires you to input | | | | not work well with cold hands or objects. The second |
| and receive information. | | | | type of Infrared touch screen monitors use vertical |
| Types of technology available in Touch Screen. The | | | | and horizontal infrared sensors around the perimeter |
| commonly used are underneath: - | | | | of the touch screen. Creating a grid, the touch screen |
| Resistive Touch monitors | | | | is able to pinpoint the exact location of where the |
| A resistive touch screen monitor usually has a coat of | | | | screen has been touched and send that information to |
| very thin electrically conductive and resistive layer of | | | | the computer for processing. Infrared touch screen |
| metal. When pressed, the change in electrical current | | | | monitors are very durable and are used for industrial |
| can be measured and the input processed by a | | | | and military applications. |
| computer. While very affordable they only offer about | | | | There are many different types of touch screen |
| 75% clarity, they can also be easily damaged by | | | | technology available. The most common types include: |
| objects that are sharp. Resistive touch screen | | | | Resistive, Surface Wave, Capacitive and Infrared. |