Computer Fundamentals Index

Computer Introduction Types of computer Characteristics of computer Uses of computer History of Computers

Computer Languages

Low Level language Middle level Language High level language

Computer Generation

Generation of Computers Second generation of Computers Third generation of Computers Fourth generation of Computers Fifth generation of Computers

Peripheral Devices

Input devices Output device

Components

Block diagram and basic components Control processing unit (CPU) Software Hardware

Memory

Computer Memory Registers Memory Hierarchy RAM Vs ROM Understanding file sizes (Bytes, KB, MB, GB, TB, PB, EB, ZB, YB)

Computer Network

Types of Network Types of Area Networks (LAN, WAN, MAN) TCP Flags

Computer Virus

Computer Virus

Computer Ports

Computer Ports

How

How to hack a computer How much do Computer Programmers make How does a Computer work How to associate a file with a program How does a computer convert text into binary How does a computer process data into information How to fix a CD-ROM DVD How to fix the no input signal How to install computer memory How to associate a file with a program How to log out of your operating system How do I change my name on Google How to installation or uninstallation Microsoft Paint How to fix a not a valid Win32 application error How to fix missing Microsoft Windows .dll files How to use a computer keyboard How to erase my hard drive and start over How can I test how many words I can write a minute How to shut down a computer How do I open and edit the Windows registry How to edit the registry from the command line How to restart Microsoft Windows How to install a computer processor How to open Microsoft Paint How to fix problems in Windows after installing new software How to enable or disable the preview pane of Microsoft Outlook How to open a Microsoft .wps or Works file in Word How to view the HTML source code in Microsoft Word How to View or Change the Screen Resolution of a Monitor How to Connect and Install a Computer Keyboard How to Delete Temporary Files in Windows 10 How to determine Which Version of Microsoft Office I'm using How to find out how much hard drive space is available How to Fix PC Stuck on Verifying DMI Pool Data How to choose which items show in the notification area How to find similar images using Search by Image How to fix Low Memory and out of memory errors How To Replace the CMOS Battery How do I Update my Antivirus Program How to fix a general protection fault How to Identify problems in the Windows Device Manager How can the Base be Shown How to test if a Website or Web Page is down How Much is 1 Byte, Kilobyte, Megabyte, Gigabyte, etc

Questions

Who invented Computer What are the advantages of the Internet? What are the disadvantages of the Internet? Is my computer 64 bit? What is Edge Computing? What is a Router? What is Monitor What is Printer What is a Web Browser What is Microphone What is a Webcam What is PC What is Keyboard What is Motherboard What is WAP What is URL What is a Digital Assistant When was the first Computer Invented What is Modem What is Firmware What is Imperative Programming What is Protocol What is Safe Mode What is Device Driver What is Hybrid Topology What is Mesh Topology What is Procedural language What is a hyperlink What is a Username Who invented the Internet What is Video Card What is Sound Card What is Binary What does Alt+B do What does Alt+D do What does Alt+E do What does Alt+Esc do What does Alt+R do What does ALT + Q do What does Alt + Tab do What is Data Manipulation What is a touch screen What is Back Panel What is Analog Monitor What is AR lens What is an ATX Style Connector What is a File System What is Hard Disk Drive (HDD) What is a boot device What is accessibility What is Line In What is network Interface card (NIC) What is Optical Disk Where can I ask questions on the internet What is Auto Rotate What is CAD (Computer-aided design) What is Cable Modem What is Home Page What is boot menu What is braille reader What is flash memory What is Windows What is Clipboard What is Cyber Warfare What is Myspace Why has my IP address changed What is Jacquard Loom My computer is running slow, what steps can I do to fix it What is a Kensington Lock What is a multicore processor What is automation Are smartphones and tablets computers What is a Login Script What is a Loosely Typed Language What is Multitasking? Why my computer monitor shows no display or black screen What is REM What is Parallelization What is Overtype mode What is open with What is Bracket What is an Online Service What is REM What is Parallelization What is Overtype mode What is open with What is Bracket What is an Online Service What is the Pg Dn Key (Page Down Key) What is the Pg up Key (Page up Key) What is Palmtop Computer What is a Processing Device What is a Print Preview What is the Print Screen Key What can I do if my computer or laptop is lost or stolen What is a Model Number What are the currently available antivirus programs What are Toggle keys What is a Case fan What is a Silicon Chip What is a Slate PC What is a TAB stop What is an Octothorpe What is Task Pane What is Task View What is the svchost.exe file used for in Windows Where can I find free online virus scanners Why am I unable to increase the resolution in Windows What is Autofill When I click my mouse, it sometimes double-clicks What is Scratch What is UDIMM What is MsConfig What is an Expansion Card What is an Executable File What is an Elevated Command Prompt What is an AC Adapter What is AIMBOT What is a Software Suite What is a LED Monitor What does Alt + X do What does alt + space do What does Alt + O do Now that I’ve got a Computer, what can i do What is a Punch Card What is RDIMM What is Select All What is Serial number What is Thermos flask What programs can I use for speech recognition What are the Advantages of Computers What are the Disadvantages of Computers What does Alt + T do What Hardware Device Drivers should be Updated What is a Desktop What is a Ring Topology What is CMOS What is a Directory What is a Mechanical Mouse What is a Plotter What is a Variable What is an Icon What is Data What is HDMI What is Remote What is Right-Click What is SMPS Why does my Laptop not turn on What is a Copyright What is a Cordless Mouse What is a CSV file What is a Joystick What is a Start Button What is a Taskbar What is an Alignment What is an Output Device What is Cat 5 What is Google Chrome What is Post

Difference

Difference between hardware and software Difference between multiprocessor and distributed systems Difference between Desktop and Laptop Difference between File and folder Difference between Hard Copy and Soft Copy Open Source Programs vs Closed Source Programs

Misc

Quantum Computing Computer Software Autoexec.bat and config.sys info Update an Antivirus Use of Internet Advantages and disadvantages of Email Computing Power Internet Explorer Shortcut Keys Advanced Encryption Standard (AES) Augmented Reality Infrastructure Readiness Check Top 10 Internet tips and tricks Introduction and Features of FoxPro Features of Multimedia Top 10 online services and applications Receiving S.M.A.R.T. status bad backup and replacing error Version Control System Uninstalling Software or Apps in Windows Data Warehouse Increase or decrease font size in Word using keyboard shortcuts Mouse not detected or working in Windows Computer Cleaning Information and Steps Function Keys on Keyboard Windows 7 Alt+Tab won’t stay on top or stick

What is a touch screen?

The touch screen has been proved a revolution for every sector, such as electronics, communication, the service industry and the daily lifestyle, etc. It is one of the types of display in electronic devices like smartphones, laptops, computers, and more. To interact with different- different electronic devices like smartphones, computer, you have to press your finger on the touch screen, and the pressure will be recognized as input from your side. Then accordingly, the touch screen will act. Because touch screens always remain pressure sensitive. 

What is a touch screen

People considered the capacitive screen, which was invented by E.A. Johnson, to be the first touch screen. It was created at the Royal Radar Establishment in Malvern, United Kingdom, between 1965 and 1967. In modern times, we use touch screens as another option for mouse and keyboards in devices like computers, laptops, and tablets. Despite having a simple look, this screen display has different layers as input from our fingertips.

The first layer remains hard, which preserve touch screen electronic components and their accurate display. Below this layer, we find another layer called an electronic grid through which devices identify the inputs from the user. It remains a boon for the Technology appliances like satellite navigation devices, mobile phones, ATM kiosks, personal digital assistant video games, etc.

Screen touch offers multi-touching input methods like making clockwise and anticlockwise photos with the help of twisting with our three fingers and zoom in zoom out by spreading with two fingers. Multi-touch technology by multiple fingers was initially introduced by Apple on iPhone and then on the iPad, and so on. Which later proved a very popular Technology.

Types of technology behind touch screen.

  1. Resistive: On a resistive touch screen, a thin metallic barrier that is both electrical and resistant detects the pressure of your finger or another item. When compared to capacitive technology, this innovation is frequently a better fit. It can, however, be shattered if it makes contact with hard items. It cannot be destroyed by water or dust while answering a finger or stylus. It is also less expensive. It has a drawback in that it can be damaged by a sharp instrument and only gives 75% clarity.
  2. Capacitive: This screen is constructed of an electrically charged material with electronics in each corner that monitor it. The capacitance of the capacitive screen varies as users contact it, allowing the location to be sent and identified. It has the advantage of exceptional clarity and is impervious to dust and water. It also has the drawback of not being able to be utilized with a stylus and instead requiring the use of a bare finger. When wearing gloves and attempting to utilize a smartphone touch screen, most people are unable to do anything.
  3. Surface acoustic wave (SAW): When a surface wave touch screen is touched, it registers changes in the waves it detects and generates ultrasonic waves. This technique is more sophisticated than the other two technologies, capacitive and resistive. However, it is susceptible to the elements and does not function with hard materials. It has the benefit of being easily touched with a finger or stylus. It also has a drawback: it might be affected by dirt or water.
  4. Projected Capacitive Touch Screen: Surface Capacitive (S-Cap) is related to Projected Capacitive (P-Cap), but it has two major advantages. To begin, it can be triggered using leather gloves or light cotton gloves in addition to a bare finger. P-Cap, on the other hand, allows for multi-touch activation. A projected capacitive touch screen comprises a glass sheet with visible electrode films inserted in it and an IC chip. As a result, a three-dimensional electrostatic field is created. When a finger makes contact with the screen, the electrical current levels change, allowing the computer to identify the touch points.
  5.  IR (Infrared) Touch Screen: IR (infrared) touch screen monitors do not have a second screen or a screen sandwich on top of the display. Infrared monitors, on the other hand, provide an opaque pattern of light beams over the screen using IR transmitters and receivers.

Uses of touch screen

The technology of touch screen uses in various places like at self-service places in banks such as ATMs, smartphones, HMI, etc.

  1. Human-machine interfaces (HMIs)
    It is a touch screen on robots, and since it is between the machines and humans, known as human machine interface. The function of HMIs is to provide information and the output regarding the user inputs through this HMI.
  2. As a Kiosk in the library
    In the modern education system, we are using touch screens as a kiosk in the library to search books to get some information about the college, about the library, and many more.
  3. Infotainment Systems
    Infotainment system is a system in an automobile through which the driver or passenger interacts with that system. And, the touch screen act as an interface between the system and driver. Infotainment system is used to navigate and for entertainment purposes.
  4. Smart Appliances
    Everything is coming as an embedded system inserted by software and automatic features in today's world. As a result, a touch screen is also coming with these smart appliances because a touch screen makes it easier to interact with and run these smart appliances. Now, the types of smart appliances that can be included are washing machines, lockers, cloth dryers, etc.
  5. Smartphone
    Whether it runs on Android or iOS, almost all handsets include a touch screen interface. Cell phones have been connected with touch screens. A QWERTY keypad was used in a few of the world's first cellphones. Manufacturers started integrating touch screen displays in their mobile phones in the early 2000s.

How touch screen works

The complete work of the touch screen can be categorized into three parts, so, let's see the following three sections of work.

Touch Screen

The first one is the touch sensor is a layer of electronic components accompanied by the technology of touch sensitiveness. Behind this touch sensitiveness of a touch screen, there are many technologies that we have discussed in this page.

Technology like a capacitive, resistive, surface acoustic waves, infrared waves, etc. Therefore, here the touch sensors work to take input from the user.

Controller or coordinator

Controllers basically act as mediators between touch screen and computer, laptop or mobile. It is found between the touch screen and electronic devices like smartphones or computers in the form of a small PC card.

The controller aims to convert the input from the touch screen to the understandable language of the computer. So, accordingly, the result will be displayed on the display side.

Software driver

A driver is a software that coordinates from the touch screen to the mediator part call controller to the system, either a laptop, mobile phone, or computer.

Touch screen input/output

Touch screen act as an input as well as an output device. It is one of the few devices that act as an input and output device because the touch screen takes input from our fingertip, and simultaneously, it shows results on the screen.

Since the touch screen is a typical display, sometimes, it is also called an output device.

Advantages and Disadvantages of touch screen

Advantages of touch screen

  1. It is easy and very fast compared to other input device like mouse or keypad in mobile phones.
  2. It saves the desktop area because no other external input devices are required after using a touch screen as a mouse.
  3. According to our requirement, you can change the language on screen easily.
  4. Touch screen works faster as compared to other input devices like a mouse because whenever we want to locate something, we directly touch that and move on.
  5. The touch screen remains clean and durable for a long time of use.

Disadvantage of touch screen

  1. Touch screen is more costly as compared to the keypad and mouse. Also, in the computer, laptop or tablet, it becomes so expensive as compared to other input device.
  2. One of the major disadvantages of touch screens is a sensitivity issue. Sometimes, some function or document gets selected because this touch screen doesn't work properly.
  3. On-screen keyboard is also a disadvantage because when the keyboard opens on-screen, it covers half of the screen area, so it becomes difficult to type or write on the screen.