Computer Keyboard Schematic:
Computer Keyboard Key Design Concept:
The key design of a keyboard contains two concepts, one is the main body of the English and numeric key design, and the second is a variety of subsidiary key design.
The most common English and numeric key design scheme is commonly known as the "QWERTY" Kodi keyboard. It was invented by Christopher Latham Sholes in 1868.
The shape of the keyboard is divided into the standard keyboard and ergonomic keyboard, ergonomic keyboard is the standard keyboard will be specified in the fingering of the left-hand key area and the right-hand key area of the two plates left and right apart, and to form a certain angle, so that the operator does not have to consciously tighten the arms, to maintain a more natural form.
This design, named the Natural Keyboard by Microsoft, effectively reduces the rate of left- and right-handed keystrokes for users accustomed to typing blindly, such as the letters "G" and "H".
Some ergonomic keyboards also intentionally increase the area of commonly used keys such as the space bar and enter key, and add hand guards to the lower part of the keyboard to give support to the previously suspended wrists and reduce fatigue due to prolonged wrist suspension. These can be considered as humanized designs.
Based on the principle of work, it can be divided into mechanical keyboards, membrane keyboards, capacitive keyboards, conductive rubber keyboards,
Buying a computer keyboard Note:
1, the keyboard's feel
As the most daily contact with the input device, the feel of the most important, there is no doubt that the most important. The feel is mainly determined by the strength of the keys to the degree of resistance to the keys.
To determine how a keyboard feels in your hands, you'll want to test whether the keys have the right amount of bounce, whether the keys are evenly distributed, whether the keycaps are loose or wobbly, and whether the keystrokes are appropriate.
While different users have different requirements for key force and key range, a high-quality keyboard should be able to meet the majority of users' habits in these areas, and the key force and key cap is necessary to ensure that the key force and the key cap is firm, otherwise it may lead to key jamming or fatigue of the user.
2, the appearance of the keyboard
Appearance includes the color and shape of the keyboard, a beautiful and stylish keyboard will add a lot of color to your desktop, while an old-fashioned keyboard will make your work more boring. Therefore, for the keyboard, as long as you find it beautiful, likeable and practical, it will be fine.
3, the work of the keyboard
The cost of the keyboard is low, but it does not mean that it can be sloppy. The surface and corners of a good keyboard are handled delicately and delicately, and the letters and symbols on the keycaps are usually laser-engraved, with a concave-convex feel to the hand.
Buy carefully check the keys printed on the lettering is engraved, not the kind of direct ink printed on the keyboard, because this keyboard lettering, you can not use a long time, it will come off.
The corners of the keyboard should not be sharp. Regular keyboards have CapsLock, NumLock, ScrollLock three indicator lights should be lit.
4, keyboard key layout
Keyboard key distribution although there is a standard, but in this standard on the various manufacturers still have leeway.
The first-class manufacturer can use his experience to arrange the keys of the keyboard more considerate of the user, the small manufacturers can only follow the most basic standards, and even because of the quality of the poor distribution of keys to make the keyboard very poor.
5, the noise of the keyboard
I believe that all users hate the noise generated by the keyboard, especially those who are still working late at night, gaming, surfing the Internet users, so a good keyboard must ensure that the high speed of the keyboard only produces a small noise, does not affect the rest of the people.
6, the keyboard key conflict
In our daily lives, we more or less play some games, when playing games, there will be certain key combinations of continuous use, then this requires that these keyboards have these game keys do not conflict.
7, the length, width and height of the keyboard problem.
When we buy a keyboard, measure the length, width and height of the computer desk to place the computer keyboard is how much, and then buy.
Computer keyboard tips:
1, F1-F12
F1: help information.
F2: Select a file or folder.
Press F2 to rename.
F3: Pressing F3 on the desktop brings up the "Search Files" window.
F4: Open IE's address bar list.
F5: Refresh or Explorer the contents of the current window.
F6: Quickly locate the address bar in Explorer and IE.
F8: Can be used to display the startup menu when starting the computer.
F9: Can be used to lower the volume in WindowsMediaPlayer.
F10: Activates a menu or raises the volume in Windows or a program.
F11: You can make the current Explorer or IE full-screen.
F12: In a Word document, you can quickly pop up the Save As File window.
2, Windows window key click is the "Start" menu, "Windows + D" key combination can quickly switch desktop.
3, the keypad area, NumLock is the keypad numbers and arrow keys between the switch. When the NumLock indicator light is on, the keypad is in the form of numeric input. When the NumLock indicator light is off, to the direction of the display
Extended information:
Computer keyboard alphabetical arrangement from:
In the 1870s, the Shoals Company was the largest at the time specialized in the production of typewriters. The mechanical processes of the time were not perfect, making the keys slow to bounce back after being struck.
Once a typist hit the keys too fast, it was easy for the two keys to get twisted together, and they had to be separated very carefully by hand, which seriously affected typing speed. For this reason, the company often received complaints from customers.
In order to solve this problem, designers and engineers had a hard time. Later, a clever engineer suggested that the reason for the typewriter's stranded keys is, on the one hand, the slow rebound speed of the keys, and on the other hand, the typist's speed is also too fast. Since we can't increase the speed of rebound, why don't we think of a way to reduce the speed of typing?
This is certainly a new idea. There are many ways to reduce typist speed, the simplest of which is to disrupt the order of the 26 letters of the alphabet, placing the more commonly used letters under clumsy fingers.
For example, the letters "O," "S," and "A" are used frequently, but are placed under the clumsiest of the right ring finger, the left ring finger, and the left pinky to strike. The letters "V", "J" and "U", which are used less frequently, are handled by the index finger, which is the most flexible.
As a result, this "QWERTY" combination of keyboards was born, and gradually finalized. Later, thanks to advances in materials technology, the keys bounced back much faster than the typist could hit them, but the alphabetical order of the keyboard could not be altered.
To this day, there have been many more rational designs for the alphabet, but none of them have been popularized, so you can see how strong the forces of habit are in society.
Also, keyboard refers to keyboard-based instruments, such as the electric piano and the piano. In a live band performance, many sound effects need to be simulated by an electric piano or an electric organ, and the musicians responsible for this type of instrument are called "keyboard players".
Today, the most common input devices for personal computers are the keyboard and mouse.
The universal 101- or 102-key keyboard, named after the arrangement of the letters of the alphabet, is called a QWERTY keyboard. It was undoubtedly "born" from the English typewriter.
Bill Gates used this keyboard to illustrate what he meant by "de facto" standards: "English typewriters and computer keyboards have the letters in QWERTY order, and there's no law that says they have to be arranged that way.
But they work, and most users adhere to this standard." Interestingly, this arrangement is not a sensible layout.
The inventor of the QWERTY keyboard was named Christoph Scholes, who lived during the American Civil War in the 19th century and was the editor of the Milwaukee News. Shores, with the assistance of his friend Saul, had developed the page numbering machine and received a patent for the invention.
Glidden, a newspaper colleague, suggested that he build on this and further develop the typewriter, and got him information on the British trials.
After several years of work, Shoals and his two partners produced a prototype typewriter in 1860.
However, Shoals was dismayed to discover that his machine did not work properly as long as it was typed at a slightly faster speed. As a rule, Shores arranged the 26 letters of the alphabet in the order of ABCDEF on the keyboard, and in order to make the typed words one by one, the keys could not be too far apart. In this case, the metal rods connecting the keys would interfere with each other if the fingers moved just a little too fast.
To overcome the interference, Scholes rearranged the letter keys, spacing common letters as far apart as possible to lengthen the process of finger movement.
The counterintuitive thinking approach turned out to be a success. Excitedly, Shores typed out a line of letters, "The first blessing, for all the men, and especially, for all the women."
Scholes dedicated his invention "especially" to women, for whom he wanted to create a new profession that had never existed before - "typist. "On June 23, 1868, the U.S. Patent Office formally accepted the patent for the typewriter invention registered by Shoals, Glidden, and Sol***.
To look at this point in time, Shoals invented the keyboard letter arrangement has too many shortcomings. For example, the 10 most commonly used letters in the English language, there are 8 from the prescribed finger position is too far, not conducive to improving typing speed; In addition, the keyboard needs to be typed with the left hand of the letters of the discharge is too much, because the average person is "right-handed", so it is very awkward to use.
Some people have made statistics, the use of QWERTY keyboard, a skilled typist 8 hours of finger movement distance up to 25.7 kilometers. However, the QWERTY keyboard is still the "de facto" standard for computer keyboards today.
The DVORAK keyboard, designed by University of Washington professor August Dovrak in 1932, had a more scientific arrangement of keys, but it never became a reality.
Windows has built-in support for it. Open "Control Panel → Keyboard", go to the "Input Method Regional Settings" tab, and click the "Add" button. " button, the "Input Method Regional Settings" set to "English", and in the "Keyboard Layout / Input Method" column to find the American English - DVORAK" in the "Keyboard Layout/Input Methods" column.
After confirming this, the key positions have changed. You're now well on your way to improving your English typing speed. Of course it will still take time to readjust to the new system and patience before you succeed.
Reference:
Baidu Encyclopedia - Computer KeyboardsReference:
Baidu Encyclopedia - Computer KeyboardsKeyboards 108 Key Position Comparison Chart
101 Keyboard:
104 Keyboard.
107 Keyboard:
108 Keyboard:
Keyboard is a command and data entry device used to operate equipment, also refers to a set of function keys that have been systematically arranged to operate a machine or piece of equipment. Keyboard also forms part of a keyboard instrument, and may also refer to a musical instrument that uses a keyboard, such as a piano, digital piano, or electronic organ, etc. keyboard helps to practice typing.
Keyboards are the most commonly used and the main input device, through which letters of the alphabet, numbers, punctuation marks, etc. can be entered into a computer so that commands can be issued to the computer, data can be entered, and so on. At first these keyboards are mostly used for branded machines, such as HP, Lenovo and other branded machines are the first to use this type of keyboard, which has been widely acclaimed, and was once regarded as a branded machine features. With the passage of time, gradually on the market also appeared independent of a variety of shortcut function of the product sold separately, and with a special driver and setup software, in the compatible machine can also realize the personalized operation.