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17-01-2010, 02:45 PM
Post: #1
Big Grin touch screen technology report and ppt
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18-01-2010, 05:18 PM
Post: #2
RE: touch screen technology report and ppt
touch screen technology
Abstract:
A touchscreen 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. touchscreen 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,Touchscreens can also sense other passive objects, such as a stylus, 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 amouse 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


Technologies
There are a number of types of touchscreen technology available now

1.Resistive
A resistive touchscreen panel is composed of several layers, the most important of which are two thin, metallic, electrically conductive layers separated by a narrow gap. When an object, such as a finger, presses down on a point on the panel's outer surface the two metallic layers become connected at that point: the panel then behaves as a pair of voltage dividers with connected outputs. This causes a change in the electrical current which is registered as a touch event and sent to the controller for processing. In another way The resistive system consists of a normal glass panel that is covered with a conductive and a resistive metallic layer. These two layers are held apart by spacers, and a scratch-resistant layer is placed on top of the whole setup. An electrical current runs through the two layers while the monitor is operational. When a user touches the screen, the two layers make contact in that exact spot. The change in the electrical field is noted and the coordinates of the point of contact are calculated by the computer. Once the coordinates are known, a special driver translates the touch into something that the operating system can understand, much as a computer mouse driver translates a mouse's movements into a click or a drag.

2.Surface acoustic wave
Surface acoustic wave (SAW) sumit technology uses ultrasonic waves that pass over the touchscreen panel. When the panel is touched, a portion of the wave is absorbed. This change in the ultrasonic waves registers the position of the touch event and sends this information to the controller for processing. Surface wave touch screen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen,an din surface acoustic wave system, two transducers (one receiving and one sending) are placed along the x and y axes of the monitor's glass plate. Also placed on the glass are reflectors -- they reflect an electrical signal sent from one transducer to the other. The receiving transducer is able to tell if the wave has been disturbed by a touch event at any instant, and can locate it accordingly. The wave setup has no metallic layers on the screen, allowing for 100-percent light throughput and perfect image clarity. This makes the surface acoustic wave system best for displaying detailed graphics (both other systems have significant degradation in clarity).

3.Capacitive
capacitive touchscreen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide (ITO).[2][3]As the human body is also a conductor, touching the surface of the screen results in a distortion of the local electrostatic field, measurable as a change in capacitance. Different technologies may be used to determine the location of the touch. The location can be passed to a computer running a software application which will calculate how the user's touch relates to the computer software. And in capacitive system, a layer that stores electrical charge is placed on the glass panel of the monitor. When a user touches the monitor with his or her finger, some of the charge is transferred to the user, so the charge on the capacitive layer decreases. This decrease is measured in circuits located at each corner of the monitor. The computer calculates, from the relative differences in charge at each corner, exactly where the touch event took place and then relays that information to the touch-screen driver software. One advantage that the capacitive system has over the resistive system is that it transmits almost 90 percent of the light from the monitor, whereas the resistive system only transmits about 75 percent. This gives the capacitive system a much clearer picture than the resistive system [Image: 9995d1234854311-touch-screen-technology-...nology.jpg]


4.Surface capacitance
In this basic technology, only one side of the insulator is coated with a conductive layer. A small voltage is applied to the layer, resulting in a uniform electrostatic field. When a conductor, such as a human finger, touches the uncoated surface, a capacitor is dynamically formed. The sensor's controller can determine the location of the touch indirectly from the change in the capacitance as measured from the four corners of the panel. As it has no moving parts, it is moderately durable but has limited resolution, is prone to false signals from parasitic capacitive coupling, and needs calibration during manufacture. It is therefore most often used in simple applications such as industrial controls and kiosks.

5.Projected capacitance
Projected Capacitive Touch (PCT) technology is a capacitive technology which permits more accurate and flexible operation, by etching the conductive layer. An XY array is formed either by etching a single layer to form a grid pattern of electrodes, or by etching two separate, perpendicular layers of conductive material with parallel lines or tracks to form the grid (comparable to the pixel grid found in many LCDdisplays).
Applying voltage to the array creates a grid of capacitors. Bringing a finger or conductive stylus close to the surface of the sensor changes the local electrostatic field. The capacitance change at every individual point on the grid can be measured to accurately determine the touch location.[5] The use of a grid permits a higher resolution than resistive technology and also allows multi-touch operation. The greater resolution of PCT allows operation without direct contact, such that the conducting layers can be coated with further protective insulating layers, and operate even under screen protectors, or behind weather and vandal-proof glass.
PCT is used in a wide range of applications including point of sale systems, smartphones, and public information kiosks. Visual Planet's ViP Interactive Foil is an example of a kiosk PCT product, where a gloved hand can register a touch on a sensor surface through a glass window.[6]Examples of consumer devices using projected capacitive touchscreens include Apple Inc.'s iPhone and iPod Touch, HTC's HD2, G1, and HTC Hero, Motorola's Droid, Palm Inc.'s Palm Pre and Palm Pixi and more recently the LG KM900 Arena, Microsoft's Zune HD, Sony Walkman X series, Sony Ericsson's Aino and now Vidalco's Edge, D1 and Jewel, and the Nokia X6 phone.

6.Infrared
Conventional optical-touch systems use an array of infrared (IR) light-emitting diodes (LEDs) on two adjacent bezel edges of a display, with photosensors placed on the two opposite bezel edges to analyze the system and determine a touch event. The LED and photosensor pairs create a grid of light beams across the display. An object (such as a finger or pen) that touches the screen interrupts the light beams, causing a measured decrease in light at the corresponding photosensors. The measured photosensor outputs can be used to locate a touch-point coordinate.
Widespread adoption of infrared touchscreens has been hampered by two factors: the relatively high cost of the technology compared to competing touch technologies and the issue of performance in bright ambient light. This latter problem is a result of background light increasing the noise floor at the optical sensor, sometimes to such a degree that the touchscreenâ„¢s LED light cannot be detected at all, causing a temporary failure of the touch screen. This is most pronounced in direct sunlight conditions where the sun has a very high energy distribution in the infrared region.
However, certain features of infrared touch remain desirable and represent attributes of the ideal touchscreen, including the option to eliminate the glass or plastic overlay that most other touch technologies require in front of the display. In many cases, this overlay is coated with an electrically conducting transparent material such as ITO, which reduces the optical quality of the display. This advantage of optical touchscreens is extremely important for many device and display vendors since devices are often sold on the perceived quality of the user display experience.
Another feature of infrared touch which has been long desired is the digital nature of the sensor output when compared to many other touch systems that rely on analog-signal processing to determine a touch position. These competing analog systems normally require continual re-calibration, have complex signal-processing demands (which adds cost and power consumption), demonstrate reduced accuracy and precision compared to a digital system, and have longer-term system-failure modes due to the operating environment.

7.Strain gauge
In a strain gauge configuration, also called force panel technology, the screen is spring-mounted on the four corners and strain gauges are used to determine deflection when the screen is touched. This technology has been around since the 1960s but new advances by Vissumo and F-Origin have made the solution commercially viable. It can also measure the Z-axis and the force of a person's touch. Such screens are typically used in exposed public systems such as ticket machines due to their resistance to vandalism.

8.Optical imaging
A relatively-modern development in touchscreen technology, two or more image sensors are placed around the edges (mostly the corners) of the screen. Infrared backlights are placed in the camera's field of view on the other sides of the screen. A touch shows up as a shadow and each pair of cameras can then be triangulated to locate the touch or even measure the size of the touching object (see visual hull). This technology is growing in popularity, due to its scalability, versatility, and affordability, especially for larger units.
[edit]Dispersive signal technology
Introduced in 2002 by 3M, this system uses sensors to detect the mechanical energy in the glass that occurs due to a touch. Complex algorithms then interpret this information and provide the actual location of the touch.[10] The technology claims to be unaffected by dust and other outside elements, including scratches. Since there is no need for additional elements on screen, it also claims to provide excellent optical clarity. Also, since mechanical vibrations are used to detect a touch event, any object can be used to generate these events, including fingers and stylus. A downside is that after the initial touch the system cannot detect a motionless finger.

9.Acoustic pulse recognition
This system, introduced by Tyco International's Elo division in 2006, uses more than two piezoelectric transducers located at some positions of the screen to turn the mechanical energy of a touch (vibration) into an electronic signal.[11] The screen hardware then uses an algorithm to determine the location of the touch based on the transducer signals. This process is similar to triangulation used in GPS. The touchscreen itself is made of ordinary glass, giving it good durability and optical clarity. It is usually able to function with scratches and dust on the screen with good accuracy. The technology is also well suited to displays that are physically larger. As with the Dispersive Signal Technology system, after the initial touch, a motionless finger cannot be detected. However, for the same reason, the touch recognition is not disrupted by any resting objects.
10.Coded LCD: Bidirectional Screen
A new system that turns LCD displays into giant cameras that provide gestural control of objects on-screen [12] was introduced by MIT Media Lab in December, 2009. Instead of an LCD, an array of pinholes is placed in front of sensors. Light passing through each pinhole strikes a small block of sensors producing a low-resolution image. Since each pinhole image is taken from a slightly different position, all combined images provide a good depth information about the sensed image.
Pinholes are problematic because they allow very little light to reach the sensors, requiring impractically long exposure times. Instead of pinholes, an array of liquid crystals could work similarly but more effectively: The LCD's panel is composed of patterns of 19-by-19 blocks, each divided into a regular pattern of differently sized black-and-white rectangles. Each white area of the bi-colored pixels allows light to pass through. Background software uses 4D light fields to calculate depth map, changes the scene, and collects gesture information. The LCD alternates between mask pattern display and a normal scene display at a very high frequency/rate.


For more read this links
http://www.i-techcompany.com/touchscreen.html
http://en.wikipedia.org/wiki/Touchscreen

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11-02-2010, 09:10 PM
Post: #3
RE: touch screen technology report and ppt

.doc  Touch Screen Systems.doc (Size: 169.5 KB / Downloads: 2191)

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 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 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). These technologies are latest in this field but are very much expensive.
The uses of touch systems as Graphical User Interface (GUI) devices for computers continues to grow popularity. Touch systems are used for many applications such as ATM's, point-of-sale systems, industrial controls, casinos & public kiosks etc. Touch system is basically an alternative for a mouse or keyboard.
Various companies involved in development of touch systems mainly are Philips, Samsung etc. Even touch screen mobile phones have been developed by Philips.
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.

I.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.
2. 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.
3.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:

4-Wire Resistive Touchscreens
Touch pressure causes electrical contact between the conductive and resistive layers.
Conductive r
Separators
Resistive layer
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 Disadvantages
¢ High touch resolution ¢ 75 % clarity
¢ Pressure sensitive, works with any ¢ Resistive layers can be damaged by stylus a sharp object
¢ Not affected by dirt, dust, water, or ¢ Less durable then 5-Wire Resistive light technology
¢ Affordable touchscreen technology

Touchscreen Specifications

Touch Type: Screen Sizes: Cable Interface: Touch Resolution: Response Time: Positional Accuracy: Light Transmission: Life Expectancy: Temperature:
Humidity:
Chemical Resistance: Software Drivers:

4-Wire Resistive
12"-20" Diagonal PC Serial/COM Port or USB Port 1024 x1024 10 ms. maximum
3mm maximum error
80% nominal 3 million touches at one point
Operating: -10°Cto 70°C
Storage: -30°C to 85°C Pass 40 degrees C, 95% RH for 96 hours.
Alcohol, acetone, grease, and general household detergent
Windows XP / 2000 / NT / ME / 98 / 95, Linux, Macintosh OS


5-Wire Resistive Touchscreens
5-Wire Resistive touch technology consists of a Mu«MPe?«"tricai T~ St^nt glass or acrylic panel that is coated with electrically
contact between j coating _
the conductive I Conri.JCtiVfi conductive and resistive layers. The thin layers are
and resistive
layers. separated by invisible separator dots. When operating, an
layer Glass
Separators
Resist,ve electrical current moves through the screen. When pressure
is applied to the screen the layers are pressed together, panRi causing a change in the electrical current and a touch event
- CRT
to be registered.
5-Wire Resistive type touch screens
are generally more durable than the similiar 4-Wire Resistive type. 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 demanding point-of-
sale systems, restaurant systems, industrial controls, and other workplace applications.
Advantages Disadvantages
¢ High touch resolution ¢ 75 % clarity
¢ Pressure sensitive, works with any ¢ Resistive layers can be damaged
stylus by a sharp object
¢ Not affected by dirt, dust, water, or
light
¢ More durable then 4-Wire Resistive
technology
Touchscreen Specifications
Touch Type: 5-Wire Resistive
Cable Interface: PC Serial/COM Port or USB Port
Touch Resolution: 4096x4096
Response Time: 21 ms.
Light Transmission: 80% +/-5% at 550 nm wavelength (visible light
spectrum)
Expected Life: 35 million touches at one point
Temperature: Operating: -10°Cto 50°C
Storage: -40°C to 71 °C
Humidity: Operating: 90% RH at max 35°C
Storage: 90% RH at max 35°C for 240
Chemical Resistance: Acetone, Methylene chloride. Methyl ethyl ketone , Isopropyl
alcohol, Hexane, Turpentine, Mineral spirits, Unleaded Gasoline, Diesel Fuel, Motor Oil,

Transmission Fluid, Antifreeze, Ammonia based glass cleaner, Laundry Detergents, Cleaners (Formula 409, etc.), Vinegar, Coffee, Tea, Grease, Cooking Oil, Salt
Software Drivers: Windows XP, 2000, NT, ME, 98, 95, 3.1, DOS, Macintosh OS,
Linux, Unix (3rd Party)
Capacitive Touchscreens


Capacitive Technology
-How A Wonts

2. Electrodes are spread uniformly across the field
3, Touch of finger draws current from each skte proportionally

A capacitive touch screen consists of a glass panel with a capacitive (charge storing) material coating its surface. Circuits located at corners of the screen measure the capacitance of a person touching the overlay. Frequency changes are measured to determine the X and Y coordinates of the touch event.
Capacitive type touch screens are very durable, and have a high clarity. They are used in a wide range of applications, from restaurant and POS use to industrial controls and information kiosks.


Advantages Disadvantages
¢ High touch resolution ¢ Must be touched by finger, will not work with
¢ High image clarity any non-conductive input
¢ Not affected by dirt, grease, moisture.
Touch screen Specifications
Touch Type: Capacitive
Cable Interface: PC Serial/COM Port (9-pin) or USB Port
Touch Resolution: 1024x 1024
Light Transmission: 88% at 550 nm wavelength (visible light spectrum)
Durability Test: 100,000,000 plus touches at one point
Temperature: Operating: -15°C to 50°C
Storage: -50°C to 85°C
Humidity: Operating: 90% RH at max40°C, non-condensing
Chemical Resistance: The active area of the touchscreen is resistant to all chemicals
that do not affect glass, such as: Acetone, Toluene, Methyl ethyl ketone, Isopropyl
alcohol, Methyl alcohol, Ethyl acetate, Ammonia-based glass cleaners, Gasoline,
Kerosene, Vinegar
Software Drivers: Windows XP, 2000, NT, ME, 98, 95, 3.1, DOS,
Macintosh OS, Linux, Unix (3rd Party)
PenTouch Capacitive Touchscreens
PenTouch Capacitive touchscreen technology works with the CRT and LCD touch
monitors. This screen combines durable Capacitive technology with a tethered pen stylus.
The screen can be set to respond to finger input only, pen input only, or both. The pen
stylus is a good choice for signature capture, on-screen annotations, or for applications
requiring precise input.

Surface Acoustic Wave Touchscreens

1
I
Reflectors
T transducer
Surface Acoustic Wave technology is one of the most advanced touch screen types. It is based on sending acoustic waves across a clear glass panel with a series of transducers and reflectors. When a finger touches the screen, the waves are absorbed, causing a touch event to be detected at that point. Because the panel is all glass there are no layers that can be worn, giving this technology the highest durability factor and also the highest clarity. This technology is recommended for public information kiosks, computer based training, or other high traffic indoor environments.

Advantages

Disadvantages

High touch resolution Highest image clarity All glass panel, no coatings or layers that can wear out or damage

Must be touched by finger, gloved hand, or soft-tip stylus. Something hard like a pen won't work
Not completely sealable, can be affected by large amounts of dirt, dust, and / or water in the environment.


Near Field Imaging Touchscreens
NFI is one of the newest technologies. It consists of two laminated glass sheets with a patterned coating of transparent metal oxide in between. An AC signal is applied to the patterned conductive coating, creating an electrostatic field on the surface of the screen.

When the finger or glove or other conductive stylus comes into contact with the sensor, the electrostatic field is disturbed. It is an extremely durable screen that is suited for use in industrial control systems and other harsh environments. The NFI type screen is not affected by most surface contaminants or scratches. Responds to finger or gloved hand.
Infrared Touchscreens
Infrared touch screen monitors are based on light-beam interruption technology. A frame surrounds the display's surface. The frame has light sources, or light-emitting diodes (LEDs).on one side, and light detectors on the opposite side. This design creates an optical grid across the screen. When any object touches the screen, the invisible light beam is interrupted, causing a drop in the signal received by the photo sensors. One concern with this technology is that it might respond to a very light touch, even that of an insect crossing the monitor, making unwanted system adjustments. This is the only type of touch technology that are available for large displays such as 42-inch Plasma screens. It is a durable technology that offers high image clarity. Responds to any input device or stylus.
Information Kiosk Systems
A Kiosk (pronounced key-osk) is a computer based terminal or display that is used to provide information or services, typically in a public place. Kiosk systems are being used in a variety of applications, including information directories, customer self-service terminals, electronic catalogs, internet access terminals, tourism guides, and more.

Complete Kiosk Systems
Several affordable and easy to use kiosk enclosures are available with integrated touch screen monitors. Available with several of the leading touchscreen technologies and with a variety of laminate, stained oak, and painted metal finishes.


Mountable Monitors for Kiosk Systems
A variety of mountable displays that can be used in kiosk applications, including mountable CRT monitors and several types of mountable flat panel monitors are available.
Other Components for Kiosk Systems
A variety of hardware components that can be used in information kiosk systems, including mountable printer, fan, and speaker grills are available.
Software for Kiosk Systems
Several software packages can be used in a kiosk environment, including a presentation development package and an on-screen keyboard package.

Software, Cables, and Accessories
Software:
Touchscreen related software, including presentation development software and other utilities

1. MYTSOFT
My-T-Soft On-Screen Keyboard Software
2. RIGHTTOUCH
RightTouch Right-Click
Utility Software


MYTSOFT
My-T-Soft On-Screen Keyboard Software
My-T-Soft is an On-Screen keyboard utility that works with any Windows 95 / 98 / Me / NT / 2000 / XP software. It provides on-screen keyboards and user programmable buttons that allow users to enter data using a touchscreen display.
My-T-Soft can be used by itself in home or workplace applications, and it includes a developer's kit that allows the keyboard to be called up from Web pages and other programs By allowing systems to operate without the need for a physical keyboard, external templates, membranes, or buttons, My-T-Soft can provide the finishing touch on sealed systems that only require a touchscreen for user input.
My-T-Soft uses a concept called "Heads Up Display" technology and its principal objective is to keep the users focus and concentration centered in one place. My-T-Soft uses that concept to reduce the visual re-focusing and re-positioning caused by the head's up and down motion of going from screen to keyboard to screen.
Features:
Over 40 "Heads-Up Display" Keyboards with 12 base sizes and infinitely larger sizes
ABCD Alphabetical, QWERTY, 3 DVORAK'S, and over 40
International (German, Spanish, French, etc.) with Edit and Numeric panels.
Store up to 2000 keystrokes/menu selections (or the applications macro scripts) on each
button. Up to 15 buttons can be grouped on individual Panels, which auto-open when
their assigned application becomes active.
Developer friendly
Show & Hide keys, program keys in Key Options, Custom logo display, Operator mode, on-demand functionality. The Developer's Kit comes with all kinds of utilities, source code, sample code, and a wealth of information for integrating My-T-Soft with your own application. Assignable Functions for Pointing Device Buttons
RIGHTTOUCH RightTouch Right-Click Utility Software
An easy interface to bring Right Click capability to any touchscreen.
Most touchscreens work by emulating left mouse button clicks, so that touching the screen is the same as clicking your left mouse button at that same point on the screen. But what if you need to right click on an item? Some touchscreens do include right click support, but many do not. The Right Touch utility provides an easy way to perform right clicks with any touchscreen.
The Right Touch utility places a button on your desktop that allows you to switch the touchscreen between left and right clicks. When the screen is emulating left clicks, simply touch the Right Touch button to change to right click mode. Touch again, and you're back to the standard left click.
Software Requirements
W indows95/98/M E/NT/2000/XP
Note: Many of the touchscreen systems include a similar right-click tool with their software driver. The Right-Touch software is useful for touchscreens that do not have an included right click utility.
Cables:

Cables for use with the touch monitors, includes video and serial port extension cables. Serial Cables
SERIAL25: 25-Foot Serial Extension Cable SERIAL50: 50-Foot Serial Extension Cable SERIAL100: 100-Foot Serial Extension
VGA Video Cables
VGA25: 25-Foot VGA Extension Cable VGA50: 50-Foot VGA Extension Cable VGA100:100-Foot VGA Extension Cable
VGA-Y: VGA Video Y-Splitter Cable
Accessories:
Stylus Pens

A stylus pen can be used along with our touchscreen systems for precise input.
STYLUS1
Stylus Pen for Resistive Touchscreens
^^^STYLUS2
Stylus Pen for Surface Acoustic Wave Touchscreens
Touch Screen Drivers UPD Driver 3.5.18
These drivers are for 3M Dynapro SC3 and SC4 Controllers The new UPD Driver will work for the following controllers: SC3 Serial, SC4 Serial, SC4 USB. Supported platforms are Win2000/WinNT/Win9x/Me/XP. DOS and other drivers
Linux Drivers for SC3 and SC4 Controllers
Linux drivers for SC3 and SC4 were developed by a third party, not 3M Touch Systems, and are provided for our customers convenience. 3M Touch Systems cannot offer any warranty or technical support for them.
Linux Drivers
TouchWare Driver, Release 5.63 SR3
These drivers are for MicroTouch Touch Controllers (EXII, SMT3, MT3000, MT410, MT510)
This release improves performance for Windows XP drivers. It provides multiple monitor support, including dual head video adapters, from TouchWare 5.63. Supported platforms are WinXP/Win2000/WinNT/Win9x/Me.
This service release also corrects known problems with silent installation. Microcal 7.1
Use this utility to modify controller settings and to calibrate the sensor at different resolutions under DOS. Microcal is compatible with fully-integrated ClearTek capacitive and TouchTek resistive touchscreens. This release supports any serial and PS/2 SMT controller, PC BUS controllers and the MT400 controller.
Near Field Imaging OEM Drivers
Use the OEM drivers below with Near Field Imaging touch screen products.
For Windows NT/9X:
8.4-inch Near Field Imaging touch screens (approx. 2.5MB) For Windows NT/9X/3.1 and MS-DOS:
10.4-inch and larger Near Field Imaging touch screens (approx> 3.6MB)
For Windows XP/2000 for 10.4-inch and larger Near Field Imaging touch screens Linux Drivers for NFI
Linux drivers for NFI were developed by a third party, not 3M Touch Systems, and are provided for our customers' convenience. 3M Touch Systems cannot offer any warranty or technical support for them.
APPLICATIONS
The touch screen is one of the easiest PC interfaces to use, making it the interface of choice for a wide variety of applications. Here are a few examples of how touch input systems are being used today:
1. Public Information Displays
Information kiosks, tourism displays, trade show displays, and other electronic displays are used by many people that have little or no computing experience. The user-friendly touch screen interface can be less intimidating and easier to use than other input devices, especially for novice users. A touchscreen can help make your information more easily accessible by allowing users to navigate your presentation by simply touching the display screen
2. Retail and Restaurant Systems
Time is money, especially in a fast paced retail or restaurant environment. Touchscreen systems are easy to use so employees can get work done faster, and training time can be reduced for new employees. And because input is done right on the screen, valuable counter space can be saved. Touchscreens can be used in cash registers, order entry stations, seating and reservation systems, and more
3. Customer Self-Service
In today's fast pace world, waiting in line is one of the things that has yet to speed up. Self-service touch screen terminals can be used to improve customer service at busy stores, fast service restaurants, transportation hubs, and more. Customers can quickly place their own orders or check themselves in or out, saving them time, and decreasing wait times for other customers. Automated bank teller (ATM) and airline e-ticket terminals are examples of self-service stations that can benefit from touchscreen input.
4. Control and Automation Systems
The touch screen interface is useful in systems ranging from industrial process control tc home automation. By integrating the input device with the display, valuable workspace can be saved. And with a graphical interface, operators can monitor and control complex operations in real-time by simply touching the screen.
4. Computer Based Training
Because the touch screen interface is more user-friendly than other input devices, overa training time for computer novices, and therefore training expense, can be reduced. It can also help to make learning more fun and interactive, which can lead to a more beneficia training experience for both students and educators.
5. Assistive Technology
The touch screen interface can be beneficial to those that have difficulty using other input devices such as a mouse or keyboard. When used in conjunction with software such as on-screen keyboards, or other assistive technology, they can help make computing resources more available to people that have difficulty using computers.
ADVANTAGES OVER OTHER POINTING DEVICES
Touch screens have several advantages over other pointing devices;
¢ Touching a visual display of choices requires little thinking and is a form of direct manipulation that is easy to learn.
¢ Touch screens are the fastest pointing devices.
¢ Touch screens have easier hand eye coordination than mice or keyboards.
¢ No extra work space is required as with other pointing devices.
¢ Touch screens are durable in public access and in high volume usage.
Disadvantages
¢ User's hand may obscure the screen.
¢ Screens need to be installed at a lower position and tilted to reduce arm fatigue.
¢ Some reduction in image brightness may occur.
¢ They cost more than alternative devices.
Conclusion
Touch systems represent a rapidly growing subset of the display market. The majority of touch systems include touch sensors relying on vacuum-deposited coatings, so touch coatings present opportunity for suppliers of vacuum coatings and coating equipments.
Touch sensor manufactures currently require thin films in the areas of transparent conductors, optical interference coating and mechanical protective coatings. Touch sensors technical requirements dovetail well with those of the flat panel and display filter markets. The reality should provide value added opportunities to operations participating in these areas.

Bibliography
Computer Graphics
C Version
Websites
http://www.Touchscreens.com
http://www.Abilityhuh.com
http://www.Webopedia.com/Touchscreen
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01-04-2010, 09:02 PM
Post: #4
RE: touch screen technology report and ppt
please read http://www.seminarprojects.com/Thread-to...rt-and-ppt and http://www.seminarprojects.com/Thread-to...technology for getting more information and report of Touch Screen technology

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03-04-2010, 10:41 PM
Post: #5
RE: touch screen technology report and ppt
Touch Screen Technology

Presented by
Kamal Sharma
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.
In 1974, the first true touch screen incorporating a transparent surface came on the scene 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.
Introduction
The touch screen is one of the easiest to use and most intuitive of all PC interfaces, making it the interface of choice for a wide variety of applications. A touch interface allows users to navigate a computer system by touching icons or links on the screen.


Introduction (contd.)
A touchscreen is an input device that allows users to operate a PC by simply touching the display screen. Touch input is suitable for a wide variety of computing applications. A touchscreen can be used with most PC systems as easily as other input devices such as track balls or touch pads. Browse the links below to learn more about touch input technology and how it can work for you.


What Are Touchscreens Used For?

Touchscreen systems are being used in a variety of applications, including point-of-sale systems, public information displays, industrial control systems, and more.
A Touch Screen
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.



1. Touch Sensor
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.


2. 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 for 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.


3. 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.


4-Wire Resistive Touchscreens
4-Wire Resistive touchscreen technology is used in the touch add-ons that we offer for PC monitors and notebooks. It is a reliable and affordable technology that is widely used by individuals and in less demanding workplace applications. It is pressure sensitive so it responds to any input device, including finger, gloved hand, or pen stylus.


5-Wire Resistive Touchscreens

We offer 5-Wire Resistive touchscreen technology with the CRT and LCD touch monitors that we offer. It is a durable and accurate technology that is widely used in demanding workplace applications such as point-of-sale systems, industrial controls, and medical systems. It is pressure sensitive so it responds to any input device, including finger, gloved hand, or pen stylus.


Capacitive Touchscreens
We offer Capacitive touchscreen technology with the CRT and LCD touch monitors that we offer. It is a durable technology that is used in a wide range of applications including point-of-sale systems, industrial controls, and public information kiosks. It has a higher clarity than Resistive technology, but it only responds to finger contact and will not work with a gloved hand or pen stylus.


PenTouch Capacitive Touchscreens
We offer PenTouch Capacitive touchscreen technology with the CRT and LCD touch monitors that we offer. This screen combines durable Capacitive technology with a tethered pen stylus. The screen can be set to respond to finger input only, pen input only, or both. The pen stylus is a good choice for signature capture, on-screen annotations, or for applications requiring precise input. Follow this link for more information.


Surface Acoustic Wave Touchscreens
We offer Surface Acoustice Wave touchscreen technology with the CRT and LCD touch monitors that we offer. It is a very durable screen that is widely used in applications such as computer based training and information kiosk displays. The SAW screen is a good choice for applications where image clarity is important, but it may not perform well in extremely dirty or dusty environments. Responds to finger or soft rubber tipped stylus. Follow this link for more information.


Near Field Imaging Touchscreens
We offer Near Field Imaging touchscreen technology as one of the custom LCD touch monitor solutions that we can provide. It is an extremely durable screen that is suited for use in industrial control systems and other harsh nvironments. The NFI type screen is not affected by most surface contaminants or scratches. Responds to finger or gloved hand. Follow this link for more information.



Infrared Touchscreens


We offer Infrared touchscreen technology with the Plasma display solutions that we offer. This is the only type of touch technology that we have available for large displays such as 42-inch Plasma screens. It is a durable technology that offers high image clarity. Responds to any input device or stylus. Follow this link for more information.


Touchscreen Snapshot
Public Information Displays

Information kiosks, tourism displays, trade show displays, and other electronic displays are used by many people that have little or no computing experience. The user-friendly touch screen interface can be less intimidating and easier to use than other input devices, especially for novice users. A touchscreen can help make your information more easily accessible by allowing users to navigate your presentation by simply touching the display screen.
Retail and Restaurant Systems

Time is money, especially in a fast paced retail or restaurant environment. Touchscreen systems are easy to use so employees can get work done faster, and training time can be reduced for new employees. And because input is done right on the screen, valuable counter space can be saved. Touchscreens can be used in cash registers, order entry stations, seating and reservation systems, and more.


Other uses of Touchscreen


Customer Self-Service
Control and Automation Systems
Computer Based Training
Assistive Technology











Q&A








Thank You!


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