Published on Dec 28, 2016

Keyboard White Background Images

License Info: Creative Commons 4.0 BY-NC

The keyboard is the most commonly used computer input device. It translates each keystroke from typist to signal that the computer can understand. The keyboard can be wireless or connected to a computer via a cable.

How Keyboard Works?

The keyboard consists of two parts: a set of keys which are pushed towards the typist sequence (or processor) and an encoder that identifies each depressed key and generates a code that uniquely identifies the key. The basic kit includes the standard alphanumeric keys, found on old typewriters and additional keys as navigation arrow and function keys, Apple keys, or the Windows, and a numeric keypad. Keyboards for laptops have a minimum of buttons.

The encoder is a microprocessor located in the keypad that opens onto each key as it is pressed and released. For this purpose, the encoder supports a wide range of signals in the network of intersecting rows and columns. When a typist pressed a button and the connection is made on the grid. For example, if the connection is in the first row and the third column encoder immediately determine pressing and sends a special signal, called a “scan code” on the computer. The computer converts the code into the appropriate scan binary code and indicates the nature of the monitor so that the typist can check that the correct key has been pushed.


Indicators on the keyboard (for Caps Lock, Num Lock, Scroll Lock, etc.) are controlled by the computer and not the keyboard. For example, when the typist presses the Caps Lock key, the keyboard encoder sends the Caps Lock key code to the computer, and the computer on the keyboard turns on the Caps Lock light with this function typist can type any alphabet letter in capital letters.

Ergonomic Keyboard

Ergonomic keyboards are designed to deal with the hands, wrists, and shoulder ailments common among typists. Uncomfortable position of the wrist can lead to muscle, tendon and nerve damage in the wrist (carpal tunnel syndrome) and arms as a result of decreased blood flow and contraction caused by the inflammation of the tendons.

Ergonomic keyboard claim to reduces the incidence of stress syndrome, including carpal tunnel syndrome, by setting keys for each hand in a more natural position of the hands, wrists, and hands is a typist. Ergonomic keyboard include wavy keyboard, split keyboard and separate keyboard.

keyboard operators should pay particular attention to ergonomic factors in their work environment. The chair and the keyboard should be positioned so that the typist can sit up straight with your feet on the floor, both hands are free to move without hitting or hands get tired.

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