What is a Touch Screen in Computer ?
- Touch screen is a pointing device.
- It is most simple & easiest to learn of all input devices.
- It allows the user to choose from available options by simply touching with their figure to the desired icon or menu item displayed on the computer screen.
- 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 touching the display of the device with a finger or hand.
- Touch screens are common in devices such as computers, tablet computers &Smartphone.
- The touch screen has two main attributes::
o First, it enables one to interact directly with what is displayed.
o Secondly, it lets one do so without requiring any intermediate device that would need to be held in the hand - It’s a very easy to operate device which users can use the system without any formal training.
- Uses optical sensors that detect the touch of the finger on screen.
- Sensors communicate the position of touch to the computer which interprets theinput made by the users.
- It contains pressure sensitive monitors which are placed inside the base of computer screen.
- Pressure sensitive monitors contain sensors to measure the monitor’s weight at many points.
- When user touches the screen, the changes on weights & forces transferred down to sensor which allows the device to detect the location of the touch.
- This type of monitors required little pressure to transmit the desired input.
- Touch screen are commonly used in following places.
o An airport or railway station.
o Large departmental stores.
o In large museums or zoos to guide visitors to the locations of various attractions.
o Self service check out
o In ATM machines
o In I-phones or PDA’s
o Computer based training
Any type of touch screen contains Three main components:
A touch screen sensor panel:
- Which sits above the display & generate appropriate voltage according towhere precisely it is touched?
A touch screen controller:
- Processes the signal received from the sensor & translates this touch event data & passed to pc’s processor via serial or USB interface.
A soft ware driver:
- Provides an interface to the pc’s operating system & which translates the touch event data into mouse event
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Basic Computer Questions
Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these
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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card
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Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM
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Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C
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Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java
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Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device
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Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these
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Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator
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Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these
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Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??