A computer keyboard is a device that allows the user to enter data into a computer. It consists of a set of keys arranged in a specific order. The keyboard is available as a wired or wireless keyboard.
A wired keyboard and a wireless keyboard adapter plug into a USB port.
Typing keys
1 – Control keys. They are used to perform certain actions. They can be used alone or in combination with other keys.
2 – Function keys. These keys execute a specific action on the system. For example, on a notebook, the combination of the «Fn» key and one of the function keys (F1, F2, F3, etc.) increase or decrease the sound, brightness, and so on.
3 – Indicators for enabling Caps Lock, Scroll lock, Num lock.
4 – Keys to work with reading and documents. These include keys: Page Up, Page Down, Home, End, Del, Esc.
5 – Auxiliary keys, enabled by pressing Num lock.
6 – Cursor control keys.
7 – Alphanumeric keys for typing text, numbers, symbols.
Types of keyboards
Membrane keyboards
membrane keyboard consists of an elastic silicone membrane that squeezes out when the key is pressed.
Pressing the key bridges the contact lines on the printed circuit board.
This is a budget type of keyboard. Eventually, the silicone membrane becomes worn out, and the printed circuit board cannot read the keypress signal.
Mechanical keyboards
Under each mechanical key, you find a separate switch system. Using switches makes the keyboard more reliable. In addition, the keyboard has a characteristic "click" when the key is pressed. This type of keyboard ranks in the more expensive segment than membrane keyboards.
Hybrid keyboards
These keyboards are a combination of mechanical and membrane keyboards. The combination of these types of keyboards provides the membrane keys with tighter feedback and longer life.
Touch keyboards
The touch keyboard is a full-fledged display with a high-precision array that senses every press of the fingers.
Flexible keyboards
Flexible keyboards are available with different numbers of keys. There are also models in different colors, matte and glossy. In addition, this keyboard is sealed and resistant to moisture and dust.
Optical keyboards
The optical keyboard features mechanical moving elements. Once the key is pressed, its rod moves downward and returns back up by spring action. There is an emitter inside the key, which directs an infrared beam to a special sensor. The rod of the key overlaps the beam, but when pressed, it allows it to connect to the sensor, sending a command to the system.
RGB backlight
RGB backlight allows you to change the color of certain keys and the keyboard as a whole. This can be useful when playing computer games as well as when working.
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