Jane pan
Piano, organ, typewriter and other parts with many keys on them.
Keyboard is the most commonly used and main input device. English letters, numbers, punctuation marks, etc. can be input into the computer through the keyboard, so as to send commands and input data to the computer.
In the era of PC XT/AT, the keyboard was mainly composed of 83 keys, which lasted for a long time, but it has been eliminated with the popularity of Windows system in recent years. Instead, keyboards with keys of 10 1 and 104 have occupied the mainstream position in the market. Of course, there have also been keyboards with keys 102 and 103, but they are only a flash in the pan due to poor promotion. In the past six months, following the 104 keyboard, a new multimedia keyboard appeared, which added many commonly used shortcut keys or volume adjustment devices to the traditional keyboard, further simplifying PC operation, and only pressing a special key to send and receive emails, open browser software, start multimedia players, etc. At the same time, the appearance has also been improved obviously, with the emphasis on the personalization of the keyboard. At first, this kind of keyboard was mostly used in brand machines, such as Hewlett-Packard and Lenovo, which took the lead in adopting this kind of keyboard and won wide acclaim. It was once considered to be the characteristic of brand machines. With the passage of time, independent products with various quick functions are gradually sold in the market, with special drivers and setting software, and personalized operation can also be realized on compatible computers.
[Edit this paragraph] Classification of keyboards
According to the application, the overall classification can be divided into five categories: desktop keyboard, notebook computer keyboard, industrial computer keyboard, dual-control keyboard and ultra-thin keyboard.
Dual USB control keyboards, one keyboard can control two computers, and one key can switch for 2 seconds, which is fast and convenient. At present, there are only 3R brands in China.
The general desktop keyboard can be classified according to the number of keystrokes, the working principle of keys and the shape of the keyboard.
According to the working principle of the keyboard and the way of pressing keys, it can be divided into four types:
A. The mechanical keyboard is similar to a metal contact switch. Its working principle is to make the contacts on or off. It has the characteristics of simple technology, high noise and convenient maintenance.
B. The plastic film keyboard is divided into four layers to realize no mechanical wear. It is characterized by low price, low noise and low cost, and occupies a considerable market share.
C. The structure of conductive rubber keyboard contacts is connected by conductive rubber. There is a layer of raised charged conductive rubber inside the keyboard, and each key corresponds to a bump. When pressed, the lower contact is turned on. This type is widely adopted by keyboard manufacturers.
D. Capacitive keyboard adopts the principle similar to capacitive switch, and changes the capacitance by changing the distance between electrodes when pressing the key, thus driving the encoder. Its characteristics are no wear and good sealing performance.
There are 83 keys, 93 keys, 96 keys, 10 1 key, 102 key, 104 key, 107 key and so on. The 104 keyboard is based on the 10 1 keyboard, and three shortcut keys (two of which are duplicated) are added to the WINDOWS 9X platform, so it is also called the WINDOWS 9X keyboard. However, there are not many users who are used to using WINDOWS keys in practical applications. In some systems that need to input a large number of single numbers, there are also small number input keyboards, which basically separate the small keyboard of the standard keyboard to achieve the purpose of reducing the size and reducing the cost.
There are two kinds of conventional keyboards: mechanical keys and capacitive keys. There is also a keyboard that touches membrane keys in the keyboard of industrial computer. Mechanical keyboard is the earliest structure, which is generally similar to the principle of metal contact switch to make the contacts on or off. It has the characteristics of simple process, convenient maintenance, ordinary feel, loud noise and easy wear. Most cheap mechanical keyboards use copper leaf springs as elastic materials. Copper leaves are easy to fold and lose elasticity, and the failure rate increases after a long time of use. Now it has been basically eliminated and replaced by capacitive keyboard. It is a keyboard based on capacitive switch, and its principle is to change the distance between electrodes by pressing the key to produce the change of capacitance, which temporarily forms the condition for allowing oscillation pulses to pass. Theoretically, this switch is non-contact, non-contact, the wear rate is very small or even negligible, and there is no hidden danger of poor contact. Its advantages are low noise and easy control of hand feel, and it can manufacture high-quality keyboards, but the process is more complicated than the mechanical structure. There is also a keyboard for industrial computers, which is only suitable for special occasions because it is completely sealed by touching the membrane keys.
The shape of keyboard can be divided into standard keyboard and ergonomic keyboard. Ergonomic keyboard is to separate the left-hand keypad and the right-hand keypad designated by fingering from each other on the standard keyboard, and form a certain angle, so that the operator does not have to consciously clamp the arm and maintain a more natural shape. The keyboard designed by Microsoft Company is named Natural Keyboard. For users who are used to typing blindly, such as letters "G" and "H", it can effectively reduce the false hit rate of left-hand keypad and right-hand keypad. Some ergonomic keyboards also intentionally 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 support the previously suspended wrist and reduce the fatigue caused by the wrist hanging for a long time. These can be regarded as humanized designs.
The shell of the keyboard. At present, the keyboard of desktop PC adopts movable keyboard, which has its own shell as an independent input component. The keyboard panel is made of different plastics according to the grade, and some high-quality keyboards use thicker steel plates at the bottom to increase the texture and rigidity of the keyboard, but this undoubtedly increases the cost, so many cheap keyboards directly adopt the design of plastic base. In order to meet the needs of different users, folding support feet are arranged at the bottom of the keyboard, which can keep the keyboard inclined to a certain extent. Different keyboards can provide single, double or even three-stage angle adjustment.
Keyboard interfaces include AT interface, PS/2 interface and the latest USB interface. Now most desktops use PS/2 interface, and most motherboards provide PS/2 keyboard interface. Older motherboards often provide AT interface, which is commonly known as "big mouth", which is not common now. As a new type of interface, some companies quickly introduced keyboards with USB interface. USB interface is just a selling point, which has little effect on performance improvement. Users who are willing to try and are not nervous about the USB port can choose.
Natural keyboard
Ergonomic keyboard is to separate the left-hand keypad and the right-hand keypad designated by fingering from each other on the standard keyboard, and form a certain angle, so that the operator does not have to consciously clamp the arm and maintain a more natural shape. The keyboard designed by Microsoft Company is named Natural Keyboard. For users who are used to typing blindly, such as letters "G" and "H", it can effectively reduce the false hit rate of left-hand keypad and right-hand keypad. Some ergonomic keyboards also intentionally 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 support the previously suspended wrist and reduce the fatigue caused by the wrist hanging for a long time. These can be regarded as humanized designs.
Ergonomics, also known as ergonomics or ergonomics, is a new discipline developed after the Second World War. It takes man-machine relationship as the research object, and takes actual measurement, statistics and analysis as the basic research methods. Specific to the product, that is, the design and manufacture of the product are completely tailored according to the physiological and anatomical functions of the human body, which is more conducive to the physical and mental health of the human body. The ergonomic keyboard divides the ordinary keyboard into two parts, which are unfolded at a certain angle to adapt to the angle of human hands. Users don't have to bend their wrists, which can also effectively reduce wrist fatigue.
Using computers and typewriters requires keyboard operation. At present, the staff who have been engaged in keyboard operation for a long time often suffer from wrist, arm and shoulder fatigue, which affects their work and rest. From the perspective of ergonomics, in order to improve work efficiency and long-term operation, the operator should be able to adopt comfortable and natural working posture, and the abnormal posture adopted by the staff due to the existing keyboard operation conditions is the main reason for physical fatigue. Because the keyboard is operated on the current workbench, if the wrist of the staff is placed on the workbench, the wrist will inevitably tilt up because the key surface of the keyboard is higher than the workbench, which will cause wrist pain for a long time; Although the operation of hanging wrist or elbow is flexible, due to the lack of support in the hand, the muscles of the arm or shoulder have to be kept in a tense state, so it can't last long and it is easy to get tired. For this problem, the existing research conclusion of ergonomics is that the height of the keyboard from the desktop to the middle row of keys should be reduced as much as possible. If the thickness of the front edge of the keyboard exceeds 50mm, it will cause the wrist to tilt up excessively, thus increasing the hand load. This thickness should be kept at about 30mm, and a palm pad can be added if necessary. That is, by thinning the thickness of the keyboard itself, the support of the hand in front of the keyboard is increased. The thickness of the keyboard is limited.
The keyboard separated in the middle can make the user's hands and wrists more relaxed and in a natural state. This can prevent and effectively reduce the strain of wrist muscles. The keys of this keyboard are at a comfortable angle for the user.
[Edit this paragraph] The history of the keyboard
Keyboards have a long history. As early as 17 14, people in Britain, America, France, Italy, Switzerland and other countries began to invent various types of typewriters. The earliest keyboards were used on typewriters with immature technology at that time. Until 1868, Christopher Latham Sholes, the American "father of typewriter", obtained the patent of typewriter model and the right to operate it. A few years later, he designed a practical form of modern typewriter and standardized the keyboard for the first time, which is now the "QWERTY" keyboard.
Why should the keyboard be standardized to the current "QWERTY" keyboard key layout? This is because at first, the keyboards of typewriters were arranged in alphabetical order, and typewriters were all-mechanical typing tools. Therefore, if the typing speed is too fast, some key combinations are easy to get stuck, so Christopher Latham Sholes invented the QWERTY keyboard layout. He put the most commonly used letters in the opposite direction, slowed down the typing speed to the maximum extent and avoided the key jam. Shoals applied for a patent in 1868, and the first commercial typewriter with this layout was successfully put on the market in 1873. This is why there is today's keyboard arrangement.
QWERTY's keyboard key layout is very inefficient. For example, most typists are right-handed, but with the QWERTY keyboard, the left hand takes up 57% of the work. The two little fingers and the ring finger of the left hand are the weakest fingers, but they are used frequently. The utilization rate of letters in the middle column only accounts for about 30% of the whole typing workload, so in order to type a word, you often have to move your fingers up and down.
1888 An open typing competition was held in the United States. Ma Jialin, a court stenographer, showed his blind typing skills according to the clear division of fingering, and the mistakes were only three ten thousandths, which surprised everyone present. According to records, Ma Jialin's prize was 0 yuan. Since then, many people have followed this blind typing, and the United States has also begun to set up schools to train typists.
Because of the appearance of blind typing technology, the keystroke speed is enough to meet the needs of daily work. However, 60 years later (1934), a man named dvorak invented a new arrangement method, which enabled his left and right hands to alternately type more words. This keyboard can shorten the training period by 1/2 times and increase the average speed by 35%. Dvorak's keyboard layout principle is: 1, try to strike alternately with your left and right hands to avoid one-handed combo; 2. The average moving distance of verbal attack keys is the smallest; 3. The most commonly used letters should be ranked in the key position.
More reasonable and efficient than Dvorak keyboard is the malt keyboard invented by Lillian malt. It changes the original staggered rows of character keys, makes the thumb easier to use, and makes the keys such as backspace, which were far away from the center of the keyboard, easier to reach. But the malt keyboard needs special hardware to be installed on the computer, so it has not been widely used.
By the middle of the 20th century, the keyboard had another use-as a basic input device for computers. On the other hand, up to now, "QWERTY" keyboard is still the most used keyboard layout, which is a very typical example of "inferior products win superior products".
[Edit this paragraph] Keyboard story
The origin of keyboard alphabetical arrangement
The alphabetical order of the keyboard is sorted according to the frequency of using letters. Interested readers may wonder: Why do you want to arrange 26 letters in this random way? It is difficult to remember and master. It is said that the reason is this:
19 In the 1970s, Shoals Company was the largest professional typewriter manufacturer at that time. Because the mechanical technology was not perfect at that time, the keys rebounded slowly after being struck. Once the typist hits the keys too fast, the two keys are easily twisted together and have to be carefully separated by hand, which seriously affects the typing speed. To this end, the company often receives complaints from customers.
Designers and engineers have racked their brains to solve this problem. Later, a clever engineer suggested that the reason why the typewriter twisted the keys was that the keys rebounded slowly on the one hand and the typist was too fast on the other. Since you can't improve the rebound speed, why not try to slow down the typing speed?
This is undoubtedly a new idea. There are many ways to slow down the typist. The easiest way is to disrupt the arrangement of 26 letters and put the more commonly used letters under clumsy fingers. For example, the letters "O", "S" and "A" are frequently used, but they are hit by the clumsiest right hand ring finger, left hand ring finger and left hand little finger. Unusual letters such as "V", "J" and "U" are handled with the most flexible index finger.
Thus, this "QWERTY" combination keyboard was born and gradually took shape. Later, due to the development of materials and technology, the speed of keys bouncing back is much faster than that of typists, but the alphabetical order of keyboards cannot be changed. Up to now, there have been many reasonable letter design schemes, but none of them can be popularized, which shows how powerful the customary forces of society are.
In addition, keyboard also refers to keyboard instruments, such as electronic organ and piano. When the band performs live, many sound effects (such as string sounds in rock music) need to be simulated by electronic piano or electronic piano. The musician in charge of this kind of instrument is called a "keyboard player".
Today, the most commonly used input devices for personal computers are keyboards and mice.
The universal keyboard with 10 1 key or 102 key is named QWERTY keyboard because of the arrangement of English letters. There is no doubt that it was born on the English typewriter. Bill Gates once used this keyboard to illustrate what is the "de facto" standard: "The alphabetical order on English typewriters and computer keyboards is QWER? Ty, there's no law that says they have to arrange this. But they are effective and most users will adhere to this standard. " Interestingly, this arrangement is not a reasonable layout.
The inventor of QWERTY keyboard is C. Shoals, who lived in the American Civil War in the19th century and was the editor of Milwaukee News. With the help of his good friend Saul, Shoals developed the page numbering machine and obtained the invention patent. Glidden, a colleague of the newspaper, suggested that he further develop a typewriter on this basis and bring him the experimental data of the British.
After years of efforts by Shoals and two partners, they made a prototype of the typewriter at 1860. However, Shoals regrets to find that as long as the typing speed is faster, his machine will not work normally. Traditionally, Shoals arranged 26 English letters in the order of ABCDEF on the keyboard. In order to make the typed words one by one, the keys should not be too far apart. In this case, as long as the finger is a little faster, the metal rods connecting the keys will interfere with each other. In order to overcome the interference phenomenon, Shoals rearranged the position of letter keys and arranged the spacing of common letters as much as possible, which prolonged the process of finger movement.
The abnormal way of thinking has actually succeeded. Shoals excitedly typed a line of letters: "The first blessing is for all men, especially for all women." Shoals "deliberately" dedicated his invention to women, and he wanted to create a new career for them-"typist". 1868 On June 23rd, the US Patent Office officially accepted the invention patents of typewriters registered by Shoals, Glidden and Sol.
At present, the keyboard alphabet invented by Shoal has too many shortcomings. For example, eight of the most commonly used letters 10 in English are too far away from the designated finger position, which is not conducive to improving typing speed; In addition, there are too many letters on the keyboard that need to be typed with the left hand. Because most people are right-handed, it is awkward to use. Some people have done statistics, using QWERTY keyboard, a skilled typist can move his finger for 25.7 kilometers in 8 hours. However, QWERTY keyboard is still the "de facto" standard for computer keyboards today. Although a dvorak, a professor at Washington University, designed a Dvorak keyboard with more scientific key arrangement in 1932, it never became a reality.
Windows built-in support for it. Open the control panel → keyboard, enter the Input Method Regional Settings tab, click the Add button, set the Input Method Regional to English (USA), and find "American English -DVORAK" in the keyboard layout/input method column. Upon confirmation, all key positions have been changed. Now you have capital to improve your English typing speed. Of course, it will take time to re-adapt to the new system and train patiently to succeed.
More advanced malt keyboard
Further than dvorak is Li Lian? The malt keyboard invented by Lillian Malt. It changes the original staggered rows of character keys, makes the thumb easier to use, and makes the keys such as backspace, which were far away from the center of the keyboard, easier to reach. But the malt keyboard needs special hardware to be installed on the computer, so it has not been widely used.
Die Story von Monty Spinnerratz
The mouse was invented by American scientist D. Engelbarth in 1964. Professor Negroponte wrote in "Digital Survival": "At first, he designed the mouse to point at documents, not paintings. But this invention has been handed down and can be seen everywhere today. "
Engelbarth is an outstanding thinker, inventor and computer pioneer. He wrote 25 books in his life and held more than 20 invention patents. He made a genius prediction and put forward a theoretical framework in many fields, such as hypertext and hypermedia system, human-computer interaction, network technology and so on. He spent his whole life trying to develop a computer to increase human intelligence, and the mouse was just an incidental invention.
Engelbarth worked as a naval radar technician during World War II, and received his doctorate from the University of California, Berkeley. He often fantasizes that computers can display graphics like radar and control operations through joysticks. 1964, with the support of the Advanced Planning Research Agency (ARPA) of the Ministry of National Defense, Engelbarth established the Augmented Research Center to realize his dream. 1968, at the American autumn computer conference, Engelbarth showed his new invention to the participants: using a keyboard, a monitor and a rough mouse to remotely operate a simple large computer 25 kilometers away, which caused a great sensation among the people who were still using punched cards to output.
The shell of Engelbarth mouse prototype is exquisitely carved from wood, with only one button, unlike the modern mouse with three buttons. A metal roller is installed at the bottom to control the movement of the cursor. 1970 when applying for patent, the name of this small device was "X-Y position indicator of display system". Someone in America joked that only men would think of calling it "mouse" because in American slang, "mouse" also means "girlfriend".
From 65438 to 0972, Palo Alto Research Center (PARC) of Xerox Company developed "Alto" microcomputer with graphical interface. Among the developers, there are people who "jumped ship" from Engelbarth Lab, and they configured the mouse on this computer as a convenient graphic control device. 1983, Apple also equipped their first mouse on the "Lisa" microcomputer. Since then, the mouse has gradually become an indispensable input device for personal computers.
[Edit this paragraph] keyboard structure
The shell of the keyboard. At present, the keyboard of desktop PC adopts movable keyboard, which has its own shell as an independent input component. The keyboard panel is made of different plastics according to the grade, and some high-quality keyboards use thicker steel plates at the bottom to increase the texture and rigidity of the keyboard, but this undoubtedly increases the cost, so many cheap keyboards directly adopt the design of plastic base.
Some keyboards use plastic hook technology to fix the keyboard panel and base, and realize the design without metal screws. So be careful when decomposing to avoid damage.
In order to meet the needs of different users, folding support feet are arranged at the bottom of the keyboard, which can keep the keyboard inclined to a certain extent. Different keyboards can provide single, double or even three-stage angle adjustment.
The traditional keyboard has three indicator lights, CapsLock (letter case lock), NumLock (numeric keypad lock) and ScrollLock, which indicate the current state of the keyboard. These indicators are generally located in the upper right corner of the keyboard, but some keyboards, such as Acer's ergonomic KB and HP's original keyboard, all use the indicators built in the keycap, which makes it easier to judge the current state of the keyboard, but the process is relatively complicated, so most ordinary keyboards do not adopt this design.
No matter how the keyboard shape changes, the basic key arrangement remains basically the same, which can be divided into main keyboard area, digital auxiliary keyboard area, F-key function keyboard area and control key area, and a shortcut key area is added to the multifunctional keyboard.
The keyboard circuit board is the control core of the whole keyboard, which is located inside the keyboard and mainly serves as the interface for key scanning recognition, coding and transmission.
Keyboard interfaces include AT interface, PS/2 interface and the latest USB interface. PS/2 interface is mostly used in high-end brand machines, which is also commonly known as "small mouth" in IBM patents at first, but more and more new motherboards begin to provide PS/2 keyboard interface. Compatible computers, especially older motherboards, often provide AT interface, which is called "big mouth". Fortunately, there are large and small keyboard conversion connectors on the market, which only cost a few yuan, and solve the compatibility problem of the two interface keyboards in one fell swoop. As a new structure, some companies quickly introduced keyboards with USB interface. USB interface is just a selling point, which has little effect on performance improvement. Willing to adopt it early, friends who are not nervous about USB port can consider it.
The reverse side of the keycap is all key plungers, which is directly related to the life of the keyboard, and its friction coefficient is directly related to the feel of the keys.
[Edit this paragraph] The development of keyboard
If the CPU is the heart of the computer and the monitor is the face of the computer, then the keyboard is the mouth of the computer, which realizes the smooth communication between people and the computer. However, as a peripheral product that has the most contact with us, the function of keyboard is neglected in most cases, which is inextricably linked with its slow development.
A brief history of "big mouth"
In the era of PC XT/AT, the keyboard was mainly composed of 83 keys, which lasted for a long time, but it has been eliminated with the popularity of Windows system in recent years. Instead, keyboards with keys of 10 1 and 104 have occupied the mainstream position in the market. Of course, there have also been keyboards with keys 102 and 103, but they are only a flash in the pan due to poor promotion. In the past six months, a new multimedia keyboard followed, and the 104 key keyboard appeared. It adds many commonly used shortcut keys or volume adjustment devices to the traditional keyboard, which further simplifies the PC operation. It only needs to press a special button to send and receive emails, open the browser software and start the multimedia player. At the same time, the appearance has also been greatly improved, focusing on the personalization of the keyboard. At first, this kind of keyboard was mostly used in brand-name machines, such as Hewlett-Packard and Lenovo, which took the lead in adopting this kind of keyboard and was widely praised. It was once regarded as the characteristic of brand-name machines. With the passage of time, independent products with various quick functions have gradually appeared in the market, with special driver and setting software, and personalized operation can also be realized on compatible computers.
Preliminary study on "mouth shape"
As for the shell, at present, the keyboards of desktop PC computers all adopt movable keyboards, and the keyboards, as independent input components, have their own shells. The keyboard panel is made of different plastics according to the grade, and some high-quality keyboards use thicker steel plates at the bottom to increase the texture and rigidity of the keyboard, but this undoubtedly increases the cost, so many cheap keyboards directly adopt the design of plastic base.
In order to meet the needs of different users, the bottom of the keyboard is equipped with folding support feet, which can keep the keyboard tilted to a certain extent. Different keyboards will provide single, double or even three-stage angle adjustment.
Traditional keyboards have uppercase lock (letter case lock), numeric lock (numeric keypad lock) and scroll lock, which indicate the current state of the keyboard. These indicators are generally located in the upper right corner of the keyboard, but some keyboards, such as Acer's ergonomic KB and HP's original keyboards, use the indicators built into the keycap. This design can make it easier to judge the current state of the keyboard, but the process is relatively complicated, so most ordinary keyboards do not adopt this design.
No matter how the keyboard shape changes, the basic key arrangement is basically unchanged, which can be divided into main keyboard area, digital auxiliary keyboard area, F-key function keyboard area and control key area, and the multi-function keyboard adds shortcut key area.
The dispute of "three mouths"
Keyboards can be divided into three categories according to their uses: desktop keyboards, laptop keyboards and industrial computer keyboards.
At present, the traditional desktop keyboard is still the mainstream in the market, but there is no essential difference between the appearance and technology with the products of a few years ago. With the improvement of life quality, the bulky desktop keyboard is increasingly incompatible with fashionable and healthy LCD and intelligent and comfortable photoelectric mouse. The traditional desktop keyboard adopts the track sliding structure. Although the key stroke of the key is long and the key feeling is good, due to the defects of the structure itself, the sound when inputting words is loud. Therefore, many well-known manufacturers continue to reform the traditional keyboard. For example, Patriot, as a well-known brand in the industry, is good at scientific and technological innovation, is good at grasping fashion, and has a keen insight into demand. In the second half of 2006, the ultra-thin feel king KB-F920 was launched, which was even better. Its design concept continues the "ultra-thin" concept, and the thinnest part of the keyboard is less than 1cm, which breaks through the massiness and rigidity of the old keyboard. The radian of lines is more natural and smooth, the buttons are slightly protruding, rich in texture, and the overall appearance is exquisite and elegant, which makes people remember deeply; At the same time, in order to help users easily face the embarrassment of keyboard flooding, Patriot has carefully improved the product structure, made materials in YEATION, and the waterproof design is more perfect, so that the traditional keyboard can be developed to a higher level.
Although the laptop keyboard did not appear in 2003, it was a great success in 2003. This kind of keyboard has always been characterized by its thinness, compactness and fashionable appearance. Many users choose notebook keyboard with LCD, so that the whole desktop will look simple and fashionable. In terms of keys, they use the frame of notebook keyboard. The key cap will not tilt because of uneven tapping force or incorrect tapping position, and the key will not be stuck; At the same time, the strength of the keys is relatively small, and users are not easy to feel tired after long-term input. In terms of mute, the notebook keyboard is designed quite well, and the voice when users input words is much smaller than that of the traditional desktop keyboard. In addition, the keyboard stroke of notebook architecture is very short, and the touch is far less than that of traditional desktop keyboard.
"Word of mouth"
Now the development trend of keyboard is more and more professional, and the performance of keyboard is different according to different uses. For example, gamers basically have a display screen or many shortcut keys; Users who want to use it frequently should be equipped with an easy-to-wash keyboard; There are luminous keyboards, separate keyboards and so on. These are all designed for the needs of users. For example, a keyboard specially designed for game applications, ZBOARD game keyboard. The most prominent feature of this keyboard is its built-in technical advantages. Compared with most other keyboards, you can press 2~4 keys at the same time, and the game keyboard can press 7 keys at most. W/E/D three commonly used keys can act at the same time, which perfectly solves the problem of key position conflict and makes it faster and more convenient for players to give action instructions during the game.
In the past, the keyboard was just a simple operation of the computer, but now the keyboard has given more functions. Keyboard with multimedia function allows computer users to control directly on the keyboard. Compared with traditional keyboards, multimedia keyboards have more keys with multimedia functions, represented by Microsoft's multifunctional keyboards. When using this keyboard, as long as you switch a key on the keyboard, several specific keys will accept its command. For example, you can connect to the Internet directly by pressing the shortcut key of the Internet, and you don't need to click the small Internet icon on the screen with the mouse. Similarly, there are specific keys to control the CD-ROM drive, such as Internet access key, e-mail sending and receiving key and voice adjustment key. Some have a circular adjusting disk under the keyboard, which can be used instead of the mouse.
At present, the hottest wireless technology on the market is also applied to keyboards. The application of wireless technology frees you from the limitation and bondage of keyboard lines. At one end you are a computer, and at the other end you can operate freely, mainly including Bluetooth and infrared rays. However, they are different in transmission distance and anti-interference. Generally speaking, Bluetooth is superior to infrared in transmission distance and security. The effective distance of infrared transmission is about1~ 2m, and that of Bluetooth is about10m. Therefore, wireless keyboards have a bright future. It not only solves the problem of computer peripheral equipment, but also paves the way for the future development of computer multifunctional entertainment. Use the TV screen to browse the Internet and watch network TV programs. It can be controlled by wireless keyboard, and the wireless function is fully displayed.
[Edit this paragraph] Keyboard cleaning