29-03-2011, 08:23 PM
plz send the ppt of given topic ..
29-03-2011, 08:23 PM
plz send the ppt of given topic ..
01-04-2011, 11:26 AM
Presented by:-
Tarantej Singh Touchscreen.ppt (Size: 2.58 MB / Downloads: 229) Touchscreen Technology Touchscreen • A touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area. • The term generally refers to touching the display of the device with a finger or hand.Touchscreens can also sense other passive objects, such as a stylus. However, if the object sensed is active, as with a light pen, the term touchscreen is generally not applicable. Attributes of Touchscreen The touchscreen has two main attributes. 1. it lets one to interact directly with what is displayed rather than indirectly with cursor controlled by mouse or touchpad without requiring any intermediate device that would need to be held or used in the hand. 2. Such displays can be attached to computers, or to networks as terminals. 3. They also play a prominent role in the design of digital appliances such as the personal digital assistant (PDA), satellite navigation devices, mobile phones, and video games. History of Touchscreen • The first self capacitance touchscreen technology was developed at CERN 1972 • This led to the development of the prototype x-y mutual capacitance touchscreen developed at CERN in 1977 by Bent Stumpe, a Danish electronics engineer, for the control room of CERN’s accelerator SPS (Super Proton Synchrotron). • Touchscreens emerged from corporate research labs in the second half of the 1940s. Touchscreens first gained some visibility with the invention of the computer-assisted learning terminal, which came out in 1975 as part of the PLATO (Programmed Logic for Automated Teaching Operations)project. Applications of Touchscreen Companies use touch screens for kiosk systems in retail and tourist settings, point of sale systems, ATMs, and PDAs, where a stylus is sometimes used to manipulate the GUI and to enter data. The popularity of smart phones, PDAs, portable game consoles and many types of information appliances is driving the demand for, and acceptance of, touchscreens. Touchscreens are popular in heavy industry, as well as museum displays or room automation, where keyboard and mouse systems do not allow a satisfactory, intuitive, rapid, or accurate interaction by the user with the display's content. the touchscreen sensor and its accompanying controller-based firmware have been made available by a wide array of after-market system integrators, and not by display, chip, or motherboard manufacturers. Display manufacturers and chip manufacturers worldwide have acknowledged the trend toward acceptance of touchscreens as a highly desirable user interface component and have begun to integrate touchscreen functionality into the fundamental design of their products Other applications of Toucscreen The following devices also use the same properties of touchscreen for various purposes:- • Touchpad • Dual Touchscreen • Graphics Tablet • Electronic Signature Touchscreen Technologies 1. Resistive 2. Surface acoustic wave 3. Capacitive 4. Surface capacitance 5. Projected capacitance 6. Mutual Capacitance 7. Self Capacitance 8. Infrared 9. Strain gauge 10. Optical imaging 11. Dispersive signal technology 12. Acoustic pulse recognition 13. Coded LCD: Bidirectional Screen Construction of Touchscreen There are several principal ways to build a touchscreen. The key goals are to recognize one or more fingers touching a display, to interpret the command that this represents, and to communicate the command to the appropriate application.In the most popular techniques, the capacitive or resistive approach, there are typically four layers: 1. Top polyester layer coated with a transparent metallic conductive coating on the bottom 2. Adhesive spacer 3. Glass layer coated with a transparent metallic conductive coating on the top 4. Adhesive layer on the backside of the glass for mounting. When a user touches the surface, the system records the change in the electrical current that flows through the display. • Dispersive-signal technology which 3M created in 2002, measures the piezoelectric effect — the voltage generated when mechanical force is applied to a material — that occurs chemically when a strengthened glass substrate is touched. • There are two infrared-based approaches. In one, an array of sensors detects a finger touching or almost touching the display, thereby interrupting light beams projected over the screen. In the other, bottom-mounted infrared cameras record screen touches. • In each case, the system determines the intended command based on the controls showing on the screen at the time and the location of the touch. Development of Touchscreen • The development of multipoint touchscreens facilitated the tracking of more than one finger on the screen, thus operations that require more than one finger are possible. These devices also allow multiple users to interact with the touchscreen simultaneously. • With the growing acceptance of many kinds of products with an integral touchscreen interface, the marginal cost of touchscreen technology is routinely absorbed into the products that incorporate it and is effectively eliminated. • As typically occurs with any technology, touchscreen hardware and software has sufficiently matured and been perfected over more than three decades to the point where its reliability is proven. • As such, touchscreen displays are found today in airplanes, automobiles, gaming consoles, machine control systems, appliances, and handheld display devices of every kind. • The ability to accurately point on the screen itself is also advancing with the emerging graphics tablet/screen hybrids. Usage 1. Finger stress • An problem of touchscreens is their stress on human fingers when used for more than a few minutes at a time, since significant pressure can be required for certain types of touchscreen. • This can be alleviated for some users with the use of a pen or other device to add leverage and more accurate pointing. • The introduction of such items can sometimes be problematic, depending on the desired use (e.g., public kiosks such as ATMs). • Also, fine motor control is better achieved with a stylus, because a finger is a rather broad and ambiguous point of contact with the screen itself. 2. Screen Protector Some touchscreens, primarily those employed in smart phones, use transparent plastic protectors to prevent any scratches that might be caused by day to day use from becoming permanent. 3. Fingernail as stylus • The issues of direct touch can be bypassed by using a different technique, provided that the user's fingernails are either short or sufficiently long. • Rather than pressing with the soft skin of an outstretched fingertip, the finger is curled over, so that the tip of a fingernail can be used instead. • The thumb is optionally used to provide support for the finger or for a long fingernail, from underneath. • This method does not work on capacitive touch screens. • The fingernail's hard, curved surface contacts the touchscreen at one very small point. Therefore, much less finger pressure is needed, much greater precision is possible (approaching that of a stylus, with a little experience), much less skin oil is smeared onto the screen, and the fingernail can be silently moved across the screen with very little resistance, allowing for selecting text, moving windows, or drawing lines. • The human fingernail consists of keratin which has a hardness and smoothness similar to the tip of a stylus (and so will not typically scratch a touchscreen). Alternately, very short stylus tips are available, which slip right onto the end of a finger; this increases visibility of the contact point with the screen. 4. Fingerprints • Touchscreens can suffer from the problem of fingerprints on the display. • This can be mitigated by the use of materials with optical coatings designed to reduce the visible effects of fingerprint oils, such as the oleophobic coating used in the iPhone 3G S, or by reducing skin contact by using a fingernail or stylus. 5. Combined with haptics • The user experience with touchscreens without tactile feedback or haptics can be difficult due to latency or other factors. 6. Gorilla arm • Gorilla Arm is defined as the failure to understand the ergonomics of vertically mounted touch screens for prolonged use. • The proposition is that human arm held in an unsupported horizontal position rapidly becomes fatigued and painful, the so-called "gorilla arm". • Vertical touchscreens still dominate in applications such as ATMs and data kiosks in which the usage is too brief to be an ergonomic problem.
07-04-2011, 02:30 PM
Presented By
Sumi Scaria Touch-Screen-Presentation.ppt (Size: 2.61 MB / Downloads: 111) INTRODUCTION Most sophisticated computer access technology. Detect the presence and location of a touch. Eliminates the need for the mouse and keyboard. The touchscreen has two main attributes: Enables to interact with what is displayed on screen. No intermediate devices required. HISTORY Emerged in the second half of the 1960s. In 1971, Sam Hurst, invented first touch sensor In 1977 , "touchscreen." TECHNOLOGIES 1) RESISTIVE: Composed of two thin, metallic, conductive layers. Change in current is registered as touch event. Advantages: fingertip input. Costs low. Supports multi-touch input. Not affected by outside elements. DISAdvantages: Offer only 75% clarity. The layer can be damaged. Cannot press hand down on the screen while writing. 2) SURFACE ACOUSTIC WAVE: Uses ultrasonic waves. It is based on sending waves across a clear glass panel with a series of transducers and reflectors. Advantages: High touch resolution. Highest image clarity. Glass panel. Disadvantages: Touched by finger, gloved hand, or soft-tip stylus. Not completely sealable. 3) CAPACITIVE: Consists of insulator coated with a transparent conductor. Touching results in a distortion of the electrostatic field. Advantages: Not affected by outside elements. high clarity. Multi touch support available. High touch resolution. Disadvantages: Must be touched by finger. More expensive. Surface capacitance: Only one side of the insulator is coated with a conductive layer. A small voltage is applied to the layer. Projected capacitance: Permits more accurate and flexible operation, by etching the conductive layer. 4) INFRARED: It employs one of two very different methodologies. Use an array of infrared light-emitting diodes. Advantages: Military applications. Have the most durable surfaces. Disadvantages: Relatively high cost. Issue of performance in bright ambient light. 5) Strain gauge : The screen is spring-mounted on the four corners. Used to determine deflection when the screen is touched. 6) Optical imaging: Two or more image sensors are placed around the edges of the screen. Revolutionizes the way we interface with computer technology. 7) Dispersive signal technology: Chemically-strenghtened glass substrate with piezos mounted on each corner. Determines position by pinpointing the source of “bending waves”. Disadvantages: After the initial touch the system cannot detect a motionless finger. 8) Acoustic pulse recognition: Uses four piezoelectric transducers located at each side of the screen. Turn the mechanical energy of a touch into an electronic signal. Advantages: Optics and durability of pure glass. Works with finger, glove, pen. Resistant to water, dust, grease. DISADVANTAGES: After the initial touch the system cannot detect a motionless finger. Comparison of touchscreen technologies CONSTRUCTION Three main components: 1) Touch Sensor Touch response surface. It is a clear glass panel. 2) Controller Interface between a touch screen sensor and the device the sensor is used to control. determines what type of interface/connection. 3) Software Driver Software update for the PC system. Allows the touchscreen and computer to work together. WORKING control board. Electrically conducting layer. print circuit board. APPLICATIONS Public Information Displays. Retail and Restaurant Systems . Customer Self-Service. Control and Automation Systems. Computer Based Training. Assistive Technology.
09-04-2011, 12:22 AM
hi this is report for touch screen. thank u
19-04-2011, 04:40 PM
TouchScreens.docx (Size: 327.23 KB / Downloads: 86) Introduction A touchscreen is an easy to use input device that allows users to control PC software and DVD video by touching the display screen. A touch system consists of a touch Sensor that receives the touch input, a Controller, and a Driver. The touch screen sensor is a clear panel that is designed to fit over a PC. When a screen is touched, the sensor detects the voltage change and passes the signal to the touch screen controller. The controller that reads & translates the sensor input into a conventional bus protocol (Serial, USB) and a software driver which converts the bus information to cursor action as well as providing systems utilities As the touch sensor resides between the user and the display while receiving frequent physical input from the user vacuum deposited transparent conductors serve as primary sensing element. Vacuum coated layers can account for a significant fraction of touch system cost. Cost & application parameters are chief criteria for determining the appropriate type determining the system selection. Primarily, the touch system integrator must determine with what implement the user will touch the sensor with & what price the application will support. Applications requiring activation by a gloved finger or arbitrary stylus such as a plastic pen will specify either a low cost resistive based sensor or a higher cost infra-red (IR) or surface acoustic wave (SAW) system. Applications anticipating bare finger input or amenable to a tethered pen comprises of the durable & fast capacitive touch systems. A higher price tag generally leads to increased durability better optical performance & larger price. The most commonly used systems are generally the capacitive & resistive systems. The other technologies used in this field are Infrared technology & SAW (surface acoustic wave technology) these technologies are latest in this field but are very much expensive. How Does a Touchscreen Work? A basic touchscreen has three main components: a touch sensor, a controller, and a software driver. The touchscreen is an input device, so it needs to be combined with a display and a PC or other device to make a complete touch input system. TouchSensor A touch screen sensor is a clear glass panel with a touch responsive surface. The touch sensor/panel is placed over a display screen so that the responsive area of the panel covers the viewable area of the video screen. There are several different touch sensor technologies on the market today, each using a different method to detect touch input. The sensor generally has an electrical current or signal going through it and touching the screen causes a voltage or signal change. This voltage change is used to determine the location of the touch to the screen. Controller The controller is a small PC card that connects between the touch sensor and the PC. It takes information from the touch sensor and translates it into information that PC can understand. The controller is usually installed inside the monitor for integrated monitors or it is housed in a plastic case Tor external touch add¬ons/overlays. The controller determines what type of interface/connection you will need on the PC. Integrated touch monitors will have an extra cable connection on the back for the touchscreen. Controllers are available that can connect to a Serial/COM port (PC) or to a USB port (PC or Macintosh). Specialized controllers are also available that work with DVD players and other devices. Software Driver The driver is a software update for the PC system that allows the touchscreen and computer to work together. It tells the computer's operating system how to interpret the touch event information that is sent from the controller. Most touch screen drivers today are a mouse-emulation type driver. This makes touching the screen the same as clicking your mouse at the same location on the screen. This allows the touchscreen to work with existing software and allows new applications to be developed without the need for touchscreen specific programming. Some equipment such as thin client terminals, DVD players, and specialized computer systems either do not use software drivers or they have their own built-in touch screen driver. Comparing Touch Technologies Each type of screen has unique characteristics that can make it a better choice for certain applications.The most widely used touchscreen technologies are the following: Resistive Wire Technology: Resistive touch screens consist of a glass or acrylic panel that is coated with electrically conductive and resistive layers made with indium tin oxide (ITO) .The thin layers are separated by invisible spacers. 4-Wire Resistive Touchscreens 4-Wire Resistive touch technology consists of a glass or acrylic panel that is coated with electrically conductive and resistive layers. The thin layers are separated by invisible separator dots. When operating, an electrical current moves through the screen. When pressure is applied to the screen the layers are pressed together, causing a change in the electrical current and a touch event to be registered 4-Wire Resistive type touch screens are generally the most affordable. Although clarity is less than with other touch screen types, resistive screens are very durable and can be used in a variety of environments. This type of screen is recommended for individual, home, school, or office use, or less demanding point-of-sale systems, restaurant systems, etc. Advantages High touch resolution Pressure sensitive, works with any object Not affected by dirt, dust, water, or Affordable touchscreen technology Disadvantages 75 % clarity Resistive layers can be damaged by stylus Less durble then 5-Wire Resistive technology
21-04-2011, 03:48 PM
report _touch.doc (Size: 276.5 KB / Downloads: 142) ABSTRACT A touch screen is a display that can detect the presence and location of a touch within the display area, generally refers to touch or contact to the display of the device by a finger or hand. Touch screen is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen, Touch screens can also sense other passive objects, such as a stylus, the touch screen has two main attributes. First, it enables one to interact with what is displayed directly on the screen, where it is displayed, rather than indirectly with a mouse 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. Such displays can be attached to computers or, as terminals, to networks. They also play a prominent role in the design of digital appliances such as the personal digital assistant (PDA), satellite navigation devices, mobile phones, and video games. INTRODUCTION A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. Touch screens are used with information kiosks, computer-based training devices, and systems designed to help individuals who have difficulty manipulating a mouse or keyboard. Touch screen technology can be used as an alternative user interface with applications that normally require a mouse, such as a Web browser. Some applications are designed specifically for touch screen technology, often having larger icons and links than the typical PC application. Monitors are available with built-in touch screen technology or individuals can purchase a touch screen kit. A touch screen kit includes a touch screen panel, a controller, and a software driver. The touch screen panel is a clear panel attached externally to the monitor that plugs into a serial or Universal Serial Bus (USB) port or a bus card installed inside the computer. The touch screen panel registers touch events and passes these signals to the controller. The controller then processes the signals and sends the data to the processor. The software driver translates touch events into mouse events. Drivers can be provided for both Windows and Macintosh operating systems. Internal touch screen kits are available but require professional installation because they must be installed inside the monitor. HISTORY In 1971, the first "touch sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky. This sensor, called the "Elograph," was patented by The University of Kentucky Research Foundation. The "Elograph" was not transparent like modern touch screens; however, it was a significant milestone in touch screen technology. In 1974, the first true touch screen incorporating a transparent surface was developed by Sam Hurst and Elographics. In 1977, Elographics developed and patented five-wire resistive technology, the most popular touch screen technology in use today. Touchscreens first gained some visibility with the invention of the computer-assisted learning terminal, which came out in 1975 as part of the PLATO project. Touchscreens have subsequently become familiar in everyday life. Companies use touch screens for kiosk systems in retail and tourist settings, point of sale systems, ATMs, and PDAs, where a stylus is sometimes used to manipulate the GUI and to enter data. The popularity of smart phones, PDAs, portable game consoles and many types of information appliances is driving the demand for, and acceptance of, touchscreens. From 1979–1985, the Fairlight CMI (and Fairlight CMI IIx) was a high-end musical sampling and re-synthesis workstation that utilized light pen technology, with which the user could allocate and manipulate sample and synthesis data, as well as access different menus within its OS by touching the screen with the light pen. The later Fairlight series III models used a graphics tablet in place of the light pen. The HP-150 from 1983 was one of the world's earliest commercial touchscreen computers. It did not have a touchscreen in the strict sense; instead, it had a 9" Sony Cathode Ray Tube (CRT) surrounded by infrared transmitters and receivers, which detected the position of any non-transparent object on the screen. Until recently, most consumer touchscreens could only sense one point of contact at a time, and few have had the capability to sense how hard one is touching. This is starting to change with the commercialization of multi-touch technology. Touch screens are popular in hospitality, and in heavy industry, as well as kiosks such as museum displays or room automation, where keyboard and mouse systems do not allow a suitably intuitive, rapid, or accurate interaction by the user with the display's content. Historically, the touch screen sensor and its accompanying controller-based firmware have been made available by a wide array of after-market system integrators, and not by display, chip, or motherboard manufacturers. Display manufacturers and chip manufacturers worldwide have acknowledged the trend toward acceptance of touch screens as a highly desirable user interface component and have begun to integrate touch screen functionality into the fundamental design of their products. WHY TOUCH SCREEN? User interface PCs are quickly becoming the control device of choices for the plant floor, machine control and any application where the user interface is important. This change has not been without its difficulties. One challenge industrial PC manufacturers have faced is simplifying the human machine interface while maintaining accuracy of input. Industrial grade touches Screen system have quickly become the input device of choice for several reasons. Touch systems generally have no additional hardware to mount and protect, such as a mouse or keyboard. A flat panel display can also be sealed by the factory to prevent damage from dust and water. The ultra thin nature of a touch screen on a LCD saves critical space, which is a vital for most application. Durability is tested to over 35 million finger touches with no over performance degradation. 1 million-touch life max Design Flexibility: - Advanced design allows flat and spherical design. Touch screen are very intuitive; it is natural for people to respond to there environment by touching. Touch screen are usually manipulated with ease and require minimal instrumentation training for a user. Best of all, touch screens draw an operator “into” the application, improving accuracy attention span and speed of response. Although the touch screen system for the riggers of everyday life, for rugged environments and the best solution for your application. BENEFITS OF TOUCH SCREEN •Reduce training expenses Touch screen system are far easier to learn then traditional keyboard based. Everyday retail function like Selection tender, editing and voiding line items and capturing customer demographic information are made intuitive by virtue of the touch screen- and the right touch screen software. Many retailers, especially those in the service sector, sell items that cannot be easily bar coded. Touch system make it easy to ring up these items and of course, still to allow the use of all standard bar coded technologies. Studies show reduction in training time in excess of 50% can be expected .Enhanced POS function can be added with the knowledge that employees will be able to utilizes them quickly and easily. •Improve customer Service If your customer has to wait for your employees to figure out how to use the store’s system, you are going lose costumer. Touch screen system eliminate this embarrassing and all too common, problem. Today’s retailers need to learn as much as possible about there customers needs and buying habits. Capturing customer’s information is a snap with touch screen POS systems. Reduce Transaction Times Studies show touch screen systems process transactions up to 60% faster than traditional keyboard POS systems. One info touch’ customer has clocked in with a traction rate of over 60 per Hrs. per register, over20, 000per day-with volunteers. •Decrease Cost In a touch screen POS system, the lay out of the color coded “keys” is stored in file on your hard drive. Change to the layout can be accomplished during the nightly poll of store data the time and expense of changing hardware key caps is eliminated.
19-07-2011, 03:22 PM
17051638-Touch-Screen.doc (Size: 237.5 KB / Downloads: 99) INTRODUCTION A touch screen is computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. Touch screen are used with information kiosks (an interactive computer terminal available for public use, as one with internet access or site specific information), computer based training devices, and system designed to help individuals who have difficulty in manipulating a mouse or keyboard. Touch screen technology can be used as an alternative user interface with application that normally requires a mouse, such as a web browser. Some applications are designed specifically for touch screen technology, often having larger icon and link than typical PC application. Monitors are available with built in touch screen kit. A touch screen kit includes a touch screen panel, a controller, and a software driver. The touch screen panels are is a clear panel attached externally to the monitors that plug in to a serial or a universal serial Bus (USB) port a bus Card installed in side the computer. The touch screen panel registers touch event and passes these signal to controller. The controller then processes the signals and sends the data to the processor. The software driver translates the touch events into mouse events. Driver can be provided for both Window and Macintosh operating systems. Internal touch screen kits are available but require professional installation because the must be installed inside the monitors. HISTORY OF TOUCH SCREEN TECHNOLOGY Dr. Sam Hurst, founder of Elographics, developed the first “touch screen”while he was an instructor at the university of Kentucky in 1971. Ten stockholders founded Elographics, Inc. in March 1971, to produce Graphical data Digitizers for use in research and industrial application, with the, principal being Dr. Sam Hurst. He was on leave from the Oak Ridge National Laboratory to tech at the University of Kentucky for two years, where he was faced with a need to read a huge stack of strip chart data. It would have taken two graduate student s approximately two month to do the task. He started to thinking of a way to read the and during the process, the “Elograph” (Electronic graphics) coordinate measuring system and Elographics the company were born. The University Kentucky research foundation applied for and was granted a patent on the Elograph. The foundation granted an exclusive license to Elographics. The touch screen is one of the easiest to use and most intuitive of all PC interface of choices fro a wide variety of applications. A touch interface to allows users to navigate a computer system by touching icon or links on the screen. Why touch screen? User interface PCs are quickly becoming the control device of choices for the plant floor, machine control and any application where the user interface is important. This change has not been without its difficulties. One challenge industrial PC manufacturers have faced is simplifying the human machine interface while maintaining accuracy of input. Industrial grade touches Screen system have quickly become the input device of choice for several reasons. Touch systems generally have no additional hardware to mount and protect, such as a mouse or keyboard. A flat panel display can also be sealed by the factory to prevent damage from dust and water. The ultra thin nature of a touch screen on a LCD saves critical space, which is a vital for most application. Durability is tested to over 35 million finger touches with no over performance degradation. 1 million-touch life max. Design Flexibility: - Advanced design allows flat and spherical design. Touch screen are very intuitive; it is natural for people to respond to there environment by touching. Touch screen are usually manipulated with ease and require minimal instrumentation training for a user. Best of all, touch screens draw an operator “into” the application, improving accuracy attention span and speed of response. Although the touch screen system for the riggers of everyday life, for rugged environments and the best solution for your application.
19-07-2011, 03:36 PM
Other uses of Touchscreen
Ralph Lauren Polo Shirts Ralph Lauren Mens Jackets Classic Polo Shirts Other uses of Touchscreen Ralph Lauren Polo Shirts Ralph Lauren Mens Jackets Classic Polo Shirts
30-07-2011, 03:19 PM
Abstract 2 (Autosaved) (Autosaved).docx (Size: 651.33 KB / Downloads: 80) Abstract: TOUCH SCREEN First computers became more visual, then they took a step further to understand vocal commands and now they have gone a step further and became TOUCHY', that is skin to screen. A touch screen is a display that can detect the presence and location of a touch within the display area, generally refers to touch or contact to the display of the device by a finger or hand. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen. Touchscreens can also sense other passive objects, such as a stylus. A touch system consists of a touch Sensor that receives the touch input, a Controller, and a Driver. The most commonly used touch technologies are the Capacitive & Resistive systems. The other technologies used in this field are Infrared technology, Near Field Imaging & SAW (surface acoustic wave technology). The touchscreen has two main attributes. First, it enables one to interact with what is displayed directly on the screen, where it is displayed, rather than indirectly with a mouse 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. Such displays can be attached to computers or, as terminals to networks. They also play a prominent role in many applications such as ATM's, point-of-sale systems, industrial controls, casinos & public kiosks , the design of digital appliances such as the personal digital assistant (PDA), satellite navigation devices, mobile phones, and video games etc… Introduction: A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. A touch screen system includes a 1. Touch screen panel, 2. controller and 3. software driver. The touch screen sensor is a clear panel that is designed to fit over a PC. When the screen is touched, the sensor detects the voltage change and passes the signal to the touch screen controller. The controller that reads & translates the sensor input into a conventional bus protocol (Serial, USB) and a software driver which converts the bus information to cursor action as well as providing systems utilities. Touch screens are used with information kiosks, computer based training devices, and systems designed to help individuals who have difficulty manipulating a mouse or keyboard. The touch screen panel is a clear panel attached externally to the monitor that plugs into a serial or Universal Serial Bus (USB) port or a bus card installed inside the computer. Touch screen technology can be used as an alternative user interface with applications that normally require a mouse, such as a Web browser. Some applications are designed specifically for touch screen technology, often having larger icons and links than the typical PC application. Monitors are available with built-in touch screen technology or individuals can purchase a touch screen kit. History of Touch screen Touchscreens emerged from corporate research labs in the second half of the 1940s. Touchscreens first gained some visibility with the invention of the computer-assisted learning terminal, which came out in 1975 as part of the PLATO project. Touchscreens have subsequently become familiar in everyday life. The first "touch sensor” ,was first developed by Dr. Sam Hurst, founder of Elographics, while he was an instructor at the University of Kentucky in 1971. This sensor was called the "Elograph", and was patented by The University of Kentucky Research Foundation. The "Elograph" was not transparent as are touchscreens, but was a significant mile-stone for touch technology. The first true touch screen came on the scene in 1974, again developed by Dr.Hurst, of Elographics. In 1977, Elographics developed and patented five-wire resistive technology, the most popular touch screen technology in use today. On February 24, 1994, the company officially changed Its name from Elographics to Elo TouchSystems.
01-08-2011, 05:58 AM
pls snd the report and ppt of touch screen with feelings
01-08-2011, 09:02 AM
To get more information about the topic " touch screen technology" please refer the link below
https://seminarproject.net/Thread-touch-...6#pid53026 https://seminarproject.net/Thread-touch-...ppt?page=3
04-11-2011, 03:50 AM
Download your Reports for Touch Screen Technology
123seminarsonlySeminar-Reports/001/Touch-Screen-Technology.html Introduction: A touch screen is an electronic visual display that 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. The ability to interact physically with what is shown on a display (a form of "direct manipulation") typically indicates the presence of a touch screen. The touch screen has two main attributes. It enables one to interact with what is displayed directly on the screen, where it is displayed, rather than indirectly with a mouse or touchpad. It lets one do so without requiring any intermediate device, again, such as a stylus that needs to be held in the hand. Why touch Screen Technology? Touch screens enable people to use computers instantly, without any training whatsoever. Touch screens eliminate keyboards and mice, which many find intimidating and cumbersome to use. Touch screens provide fast access to any and all types of digital media, with no text-bound interface getting in the way. Touch screens ensure that no space - on the desktop or elsewhere - is wasted, as the input device is completely integrated in to the monitors. How Does a Touch Screen works: A basic touch screen has three main components: Touch Screen Sensor: It is a clear glass panel with a touch responsive surface. The touch sensor/panel is placed over a display screen so that the responsive area of the panel covers the viewable area of the video screen. Controller: I t is a small PC card that connects between the touch sensor and the PC. It takes information from the touch sensor and translates it into information that PC can understand. Software Driver: The driver is a software update for the PC system that allows the touch screen and computer to work together. It tells the computer's operating system how to interpret the touch event information that is sent from the controller. Construction: Technologies used in the construction of touch screen are as follows. Resistive Surface Acoustics wave Capacitive Strain gauge Optical imaging Dispersive signal technology Acoustic pulse recognition coded LCD Advantages: User friendly fast response error free input easy to install Use finger, finger nail, gloved hand, stylus or any soft tip pointer to operate. Compatible with windows, Macintosh and Linux. Makes computing easy, powerful and fun. Disadvantages: Stress on human fingers when used for more than a few minutes at a time. Touch screens can suffer from the problems of fingerprints on the display. Touch screen devices usually has no additional keys (see the Iphone) and this means when an app crashes, without crashing the OS, you cant get to the main menu as the whole screen becomes unresponsive. These devices require massive computing power which leads to slow devices and low battery life. Screen has to be really big not to miss things when pressing them with your finger. Applications: Public Access: Museums, library resources guides, corporate information, public transportation schedule or status. Business: Restaurants, Grocery stores, Banks and financial reporting, hospital and hotel directories. Entertainment: Interactive computer games, casino. Government: Military control system, scientific lab research. Conclusion: Today, a large share of population is pc literate, yet the touch screens have been adopted by computer users of all abilities because it is simple, fast and innovative. In future there would be no use of mouse and keyboard as they would be replaced by touch screens. Download your Reports for Touch Screen Technology 123seminarsonlySeminar-Reports/001/Touch-Screen-Technology.html
02-12-2011, 10:14 AM
please send ppt for touch screen with feelings
02-12-2011, 11:21 AM
touch screen echnology power point presentation
02-12-2011, 08:13 PM
I want touch screen ppt full report ,..
if u have send to my mail id plzzz :e |
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