As the most basic and important input device in computer, keyboard plays a very important role in the history of computer development. Every program and every article is entered into the computer word by word through the keyboard. The development process of keyboard has also experienced constant reform and innovation, and it has only developed step by step to the present. From the early mechanical keyboard to the present capacitive keyboard, from the 83-key keyboard to the10/(102) key keyboard, and even to the present 108 key Windows 98 keyboard and ergonomic keyboard, it shows the rapid development of computer technology.
The wear resistance of the keyboard is very important, which is also a parameter to distinguish the quality of the keyboard. Some keyboards with miscellaneous brands are printed directly on the keys, so that the words on them will wear off soon. The advanced keyboard is carved by laser, which greatly enhances the wear resistance.
Common keyboards can be mainly divided into two types: mechanical keyboards and capacitive keyboards. At present, most keyboards are capacitive keyboards. If the keyboard is divided according to the shape, there are two kinds: ordinary standard keyboard and ergonomic keyboard. The ordinary standard keyboard is square, while the ergonomic keyboard divides the keyboard into two parts by adding wrist rest according to the ergonomic principle, which can reduce the fatigue caused by operation and is beneficial to the health of people who often do word processing. According to their interfaces, there are AT interface (big mouth), PS/2 interface (small mouth), new USB interface and other keyboards. Functionally, there are ordinary keyboards, multifunctional keyboards and so on. The multifunctional keyboard adds some function keys to the ordinary keyboard. Through these function keys, you can quickly operate the computer (such as surfing the Internet, watching VCD, adjusting the volume, turning off the computer or putting the computer to sleep). ) and improve work efficiency.
When buying a keyboard, you should also pay attention to:
1. Keys: In any aspect, the Windows 98 keyboard with 108 key should be the best keyboard bought now.
2. Types of keyboards: As mentioned above, keyboards can be divided into capacitive and mechanical types according to the structure of keys. From their characteristics, we can decide that we should buy a capacitive keyboard.
3. Interface type: Keyboard interfaces are divided into AT and PS/2. If you are newly installed, buy a keyboard with PS/2 interface, because the newer motherboard has no AT interface. Be sure to pay attention to this when buying. Many people don't pay attention when they buy it, they leave with their keyboards, and even don't open the package when they get home, wasting time and money.
4. Feel: It's hard to say how you feel, because everyone feels differently, so you won't know the feel of the keyboard until you try it yourself. Others think it's good, and you may not feel comfortable using it, as long as you try it yourself and think it suits you.
5. Keyboard workmanship: The workmanship of the keyboard affects the quality of the keyboard. The quality of workmanship can be distinguished from the appearance, and whether the surface and corners of the keyboard are handled finely and reasonably. The appearance of inferior keyboard is rough and the elasticity of keys is not good. Often a key can't get up when pressed, which affects the use.
6. Arrangement habit of keys: When choosing a computer keyboard, you should consider whether the arrangement of keys on the keyboard conforms to your own habits. Generally speaking, computer keyboards produced by different manufacturers have different arrangement of keys.
7. Brand: The quality of computer keyboards produced by different manufacturers varies greatly. Therefore, when buying a keyboard, you must first check whether the exposed part of the keyboard has been finely processed and whether the surface is beautiful. Inferior computer keyboards not only have rough appearance, poor elasticity of keys, but also have poor internal printed circuit board technology.
8. Price: The keyboard can be divided into four grades according to price and grade.
The first level is a low-grade keyboard below 50 yuan. At present, most keyboards used by compatible computers in China are of this grade, and this grade has the most counterfeit products. If you don't pay attention, you may buy a poor keyboard. This is what everyone needs to pay special attention to, and I want to explain it in detail here. Of course, there are many qualified products with high cost performance produced by domestic assembly plants in this file, which are welcomed by many ordinary people who don't have high requirements for keyboards. To buy a keyboard of this grade, you can first tap each key position by hand to see if its rebound is strong; Secondly, you can carefully check whether the handwriting printed on the keyboard is intaglio, and it is not directly watermarked with ink, because the handwriting on this keyboard will fall off soon. The method of identification is that if it is not true with naked eyes under the light, it can be distinguished between true and false with eyes under natural light, and the handwriting on the keyboard should be touched by hand. Gravure carving should have obvious concave-convex feeling, while direct printing with ink should be smooth and flat. Then, when choosing this grade keyboard, don't be too greedy. I wish the keyboard boss 20 yuan, who will sell you more than 30 yuan. Keyboard is a relatively profitable thing in computer accessories. The profit of this grade keyboard can reach 50%, that is, 15 yuan, but you believe that the boss will not do business at a loss, and the keyboard with too low price is definitely not a good thing. The quality of this grade of keyboard is good, such as colorful little sun.
The second type is 50 yuan ~ 100 yuan keyboard, which we can call a mid-range keyboard. Most of these keyboards are produced by more formal domestic manufacturers, or by some well-known foreign factories in China. Most of the quality is good, the price is not too expensive, and there is no trouble that the words on the keyboard fade without touching them a few times. While paying attention to counterfeiting, we can mainly consider whether the keyboard feels comfortable, whether it conforms to ergonomics, whether the function keys are easy to use and so on. Samsung and Philips are the better quality products in this class.
The third grade keyboard 100 yuan. Most of them are high-grade keyboards specially made by big factories. They are designed according to ergonomics and waterproof technology is added. Some of them also have programmable shortcut keys. This kind of keyboard is a natural choice for people who have high requirements on keyboard shape and special needs. When choosing this kind of keyboard, it is necessary to prevent some businesses from going up and up in order to cater to the psychology of a few people that "the more expensive the better". I've heard of this kind of thing from some merchants. As a buyer, you can learn more about the prices of several companies and know the truth through comparison. This kind of keyboard includes Logitech Shadow Player, Microsoft Natural Keyboard, Acer Water Drop Keyboard and other products, with good quality and reliable performance.
Four-level keyboard is a keyboard with special functions, such as multimedia keyboard that can play CD music, keyboard with scanner and handwritten keyboard with handwriting function. They generally have a variety of functions, but they are more expensive and are "customized" for people with special needs. It also represents a direction of keyboard development in the future. Patriot handwritten keyboard is one of the representatives.
The keyboard, like the mouse, is the cheapest part in the whole computer, but this does not mean that the keyboard has no value of careful maintenance. If a keyboard is used properly, it can last for several years, on the contrary, it can even be used for less than a month. Talking about the use and maintenance of the keyboard is not a particularly complicated process. As long as we pay a little attention, we can get very good results.
1. When loading and unloading the keyboard, cut off the power supply. We often see such things in the computer market. In order to save trouble, merchants plug and unplug keyboards with electricity. In fact, this is very dangerous and easy to burn out the motherboard circuit. Therefore, everyone must turn off the phone first when plugging and unplugging the keyboard.
2. Dust the keyboard regularly, but be careful not to let water flow into the keyboard. When operating, it can be wiped with a clean wet cloth, and the dust can be sucked away with a vacuum cleaner or blown away with compressed air. If necessary, you can pull out the key cap as follows: turn it off; Select the key to be disassembled, gently pry it open with a small screwdriver, and be careful not to damage other keys; If multiple keys are removed, remember to restore the position. Then, dust around the key slot can be removed to remove paper scraps and hair. Be careful not to let dirt or liquid fall into the keyway.
3. If you accidentally pour water on the keyboard, do the following immediately: (1) Unplug the keyboard immediately, don't hesitate! (2) Turn it off with the mouse. (3) Turn the keyboard over and drain the liquid as much as possible. (4) Blow air on the keyboard surface with a blower or fan. Be sure to turn the hair dryer into cold air-don't bake the keyboard, just blow dry. (5) Let the keyboard stand for 12 hours, preferably in the sun. (6) Reconnect the power supply and start the machine.
4. Pay attention to keep the keyboard surface clean. Once there is dirt on the keyboard, remove it in time. When not in use, the keyboard can be covered with a cover to prevent dust and water.
5. Don't use too much force when operating the keyboard. When typing and playing games, due to excessive excitement, the intensity of keystroke is obviously too large, which can easily lead to keyboard key failure. At present, there are many popular game softwares in the society, and many of them need to hit the keyboard violently. Users should play less or not play such games and cherish the use of keyboards.
6. The above methods are only effective for water. If you pour other liquids on the keyboard, you have to "treat the symptoms", that is, use the principle of mutual solubility to remove the liquids.