According to the different standards of keyboards, what are the two types of keyboards?

The overall classification of keyboards can be divided into three categories: desktop keyboards, laptop keyboards, and industrial computer keyboards according to the application.

The classification of general desktop keyboards can be reclassified according to the number of keystrokes, the working principle of the keys, and the shape of the keyboard.

Categorized according to the number of keystrokes:

The number of keys on the keyboard has appeared 83 keys, 93 keys, 96 keys, 101 keys, 102 keys, 104 keys, 107 keys, etc. The 104-key keyboard is based on the 101-key keyboard and provides three shortcuts for the Windows 9X platform (two are duplicates), so it is also called the Windows 9X keyboard. However, there are not many users who are accustomed to using Windows keys in practical applications.

In some systems that need to input a large number of single numbers, there is also a small number input keyboard, which is basically the small keyboard of the standard keyboard is separated, so as to achieve the purpose of reducing the size and reducing the cost.

Classified according to the working principle of the keys:

There are two kinds of conventional keyboards: mechanical keys and capacitive keys, and there is also a kind of keyboard with light-touch membrane keys in the industrial computer keyboard. Mechanical keyboard is the earliest structure to be adopted, generally similar to the principle of metal contact switch to make the contact conduction or disconnection, with simple process, convenient maintenance, general feel, loud noise, easy to wear and tear characteristics, most of the cheap mechanical keyboard using copper spring as an elastic material, copper easy to fold and easy to lose elasticity, the failure rate of a long time increases, now it has been basically eliminated, replaced by a capacitive keyboard. It is a keyboard based on capacitive switches, and the principle is to change the distance between the electrodes by pressing the keys to produce a change in capacitance, temporarily forming the conditions for the ** pulse to pass through.

Theoretically, this kind of switch is non-contact and non-contact, the wear rate is very small or even negligible, and there is no hidden danger of poor contact, with low noise, easy to control the feel, and can manufacture high-quality keyboards, but the process is more complex than the mechanical structure. There is also a kind of keyboard for industrial computers, which uses light-touch membrane keys in order to be completely sealed, which is only suitable for special occasions.

Classified according to keyboard form factor:

The shape of the keyboard is divided into standard keyboard and ergonomic keyboard, ergonomic keyboard is to separate the left and right hand key areas and the right hand key area on the standard keyboard, and form a certain angle, so that the operator does not have to consciously clamp his arms, maintain a more natural form, this design of the keyboard is named natural keyboard (natural keyboard) by Microsoft, for users who are accustomed to blind typing, users can effectively reduce the error rate of the left and right hand key areas, such as the letter "g" and "h". Some ergonomic keyboards also deliberately increase the area of commonly used keys such as the space bar and enter key, and add a hand guard at the lower part of the keyboard to give the previously dangling wrist a support point and reduce fatigue caused by long-term wrist hanging. These can all be considered user-friendly design.

According to the standard of the keyboard, the keyboard can be divided into standard keyboard and ergonomic keyboard.

According to the structure of the keyboard, the keyboard can be divided into two categories: mechanical and capacitive keyboards.

There are four zones, and ECS belongs to the function key area

1) Typing keyboard area.

The typing keyboard area, also known as the main keyboard area or character key area, has the format of a standard English typewriter keyboard. There are a total of 58 keys, including basic character keys and some system control keys.

2) F-key function keyboard area.

The function key area is above the keyboard and includes the F1 F12 and ESC, PrintScreen, Scrolllock, Pause Break keys. They represent different functions in different software.

3) num numeric secondary keyboard area.

The numeric keypad area is on the right side of the keyboard and has a total of 17 keys, including numeric keys, cursor keys, and some control keys. Among them, the numlock key is a numeric lock key, which is used to switch the function of the arrow key and the numeric key, which is mainly convenient for the operator to input data with one hand.

4) Control the key area.

The zone is located in the middle of the main keyboard area and the keypad area, and is used for cursor positioning and operation.

In addition to the four sections, there are 3 indicators on the upper right of the keyboard: Caps Lock indicator, Num Lock indicator, and Scroll Lock indicator. When the Caps Lock, Num Lock, and Scroll Lock keys are pressed, the corresponding lights are turned on or off, respectively.

There are 3 types of keyboards.

1. Membrane keyboard. It is more commonly used, and the advantages are cheap and the feel is good, and the disadvantages are short life.

2. Mechanical keyboard. It is usually used by professional typing or advanced gamers. Advantages: Super good feel, long service life and unchanged feel, and multiple keys do not conflict. Disadvantages**Too high to touch water.

3. Capacitive keyboard. There are basically few sales on the market, and the so-called capacitive keyboard is actually the heart of the film.

The five zones on the computer keyboard are:1.Numeric keypad area: numbers 0-9, plus +, minus -, multiply *, divide and other symbols.

Function key area: F1-F12, these keys are usually used for shortcut operation and program control.

3.Alphabet keyboard area (main): qwertyuiop, asdfghjkl, zxcvbnm. These acres of keys make up the majority of the 26 letters of the English language.

4.Control the key area: including shift (case switching), ctrl (control), alt (optional) and other functional buttons. Repentance.

5.Direction and other auxiliary function key area: including directional arrows, carriage return line breaks, tab (indent), capslock (case lock) and other auxiliary keys.

The details are as follows.

Standard keyboard, human body keyboard, multi-function keyboard.

PC (PersonalComputer), the term personal computer is derived from IBM's first desktop nuclear computer model PC in 1981, and before that there was Appleii's personal computer. A personal computer is a device that can run independently and perform a specific function by a hardware system and a software system. Hardware system:

It refers to the physical equipment of a computer such as power supply, motherboard, CPU, memory, hard disk, etc. lSoftware system: refers to the program designed to facilitate the use of the computer, and the software system includes system software and application software.

System software refers to the programs that are mainly used to control and manage the source of computer data change, such as operating system, compilation system, etc. Application software refers to a variety of programs that can be run in the operating system, such as game software, work software, etc., personal computers do not need to share other computers' processing, disks, printers and other resources can also work independently. From desktops (also known as desktop computers, desktop computers), laptops, to PDAs and tablets, etc., all fall under the category of personal computers.

Recently, both at home and abroad, many "experts" believe that one day the traditional PC will be replaced by more portable smartphones and tablets.

Standard computer keyboards can be roughly divided into three categories according to the number of keys in the forest, 101 key type, 104 key type, and 107 key type, according to the internal can be divided into mechanical keyboard, membrane keyboard, capacitive keyboard 101 type keyboard is about the period of the DOS system just appeared, in addition to the 26 keys in the main key area, it also contains the function key area, as well as a part of the cursor control area Zhen Chun open key, such as scroll lock key, forward key, back key, scroll key, Yu Sui move up key, move down key.

According to the working principle, it can be divided into mechanical keyboard, membrane keyboard, capacitive keyboard, and conductive rubber keyboard.

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