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You are here: Home » Keyboard of Desktop, Laptop and Mobile Devices

By Abhishek Ghosh March 2, 2012 12:22 pm Updated on March 2, 2012

Keyboard of Desktop, Laptop and Mobile Devices

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Keyboard of computer compared to a typewriter keyboard has more keys those are used to operate the computer and any peripherals. The computer keyboard has some other key assignments and labels. There is no fixed arrangement of the keys, each system architecture has certain autonomies, especially in notebooks resulting from the problem with space differences. Significant differences from the typewriter keyboard are the need of lower stroke pressure and the reduced energy expenditure while pressing down the keys. Some computer keyboard has backlit feature, so the buttons are visible even in darkness.

 

Technology of a keyboard

 

Mechanics of a Keyboard

 

Some of the traditional keyboards have a coil spring for the provision and a leadership that prevents jamming of the key. Keys, which occupy more than one grid space also has brackets, supporting a position against tilting compensation. Some laptop keyboards, such as HP / Compaq, Acer, have scissor-like guides for each key. Rugged Keyboards have a leaf spring with a pressure point that requires a certain minimum force to depress.

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Connectivity of a Keyboard

 

The predecessor of PS/2-interface was the PC / XT keyboard interface. In contrast to the PS / 2 – and ADB port, the USB keyboard does not transmit at all depressing and releasing a button called make-or break codes, but a block of data with status information ( flags ) for the shift keys and bytes for the other keys, in which the entire current status of the keyboard is specified. USB keyboards use a fixed time interval during which the data is transmitted, typically every 8 ms. In contrast, sends a PS/2-keyboard a status change immediately.

 

Standardization of Keyboard : IBM PC keyboard and Apple keyboard

 

Due to the widespread use of the IBM PC ‘s keyboard, many different types of keyboards has been developed with 83, 101, 105, 108 keyed Keyboard. The extended Apple keyboard has 19 function keys. In general, Apple keyboards (newer design USB Keyboard ) also run relatively smoothly on PC systems, the Command (cmd) then acts as Windows key. The right Alt key does the function of Alt key. The key assignment is otherwise as usual on the IBM PC Keyboard.

 

keyboard

 

Keyboard of Mobile devices

 

Mechanical keyboards of  Mobile devices of smart phones are more complicated than usual deskptop or laptop keyboard due to the need of multiple function driven by length in time of long press, repeated strokes, combination etc.

 

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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About This Article

Cite this article as: Abhishek Ghosh, "Keyboard of Desktop, Laptop and Mobile Devices," in The Customize Windows, March 2, 2012, February 1, 2023, https://thecustomizewindows.com/2012/03/keyboard-of-desktop-laptop-and-mobile-devices/.

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