IT History: Keyboard Development History [2004-11-5] Computer keyboard development history integrated keyboard Simple Source: Zhongqing.com is getting wider and wider, but in the field input field, keyboard still has unhaneous position. As an important input tool, the keyboard is not followed, in order to comply with the trend, continuously develop towards multimedia, multi-function and ergonomics, with novelty, practical, comfortable, and constantly consolidating the status of the input equipment giant. Keyboard Small History PC XT / AT Age's keyboard is mainly 83-key, and it continues for a long period of time, but as the window system has been eliminated in recent years. Instead, the 101-button and 104 keyboard and occupy the mainstream position of the market. Of course, there have been a keyboard of 102 keys, 103-key, but because of the promotion is not good, it is just a flower. In recent half of the 104 key keyboard, the 104-key keyboard is an emerging multimedia keyboard. It has increased a lot of common shortcut or volume adjustment devices on the basis of the traditional keyboard, so that the PC operation is further simplified, and for sending and receiving email, open browser software. , Start the multimedia player, etc., only need to press a special button, and also have significant improvements on the shape, focusing on the personalization of the keyboard. At first, such keyboards were used in brands, such as HP, Lenovo and other brands, which took the lead in using such keyboards, received extensive praise, and once considered the characteristics of the brand. Over time, an independent product is also sold separately, with dedicated drivers and setting software, and personalized operations can also be achieved on the compatible machine. The overall classification of keyboard classification can be divided into a desktop keyboard, laptop keyboard, and industrial computer keyboard. The classification of the general desktop keyboard can be based on the number of keystrokes, the keyboard profile is classified. The number of buttons of the keyboard has appeared 83 keys, 93 keys, 96 keys, 101 keys, 102 keys, 104 keys, 107 keys, etc. The keyboard of the 104 key is based on the 101-key keyboard, which provides the Windows 9x platform to add three shortcuts (there are two duplicate), so it is also known as the Windows 9x keyboard. But there are not many users who are used to using the Windows key in practical applications. In some systems that require a large number of input single numbers, there is a small number entry keyboard, basically, independent of the keyboard of the standard keyboard to achieve a reduced volume, and reduce costs. Conventional keyboards have two types of mechanical buttons and capacitive buttons, and there is a keyboard that tap the thin film button in the industrial computer keyboard. The mechanical keyboard is the most used, generally similar to the principle of metal contact switches to turn the contacts or disconnected, with simple process, convenient maintenance, general sense, noise, easy wear characteristics, most of the cheap machinery The keyboard is used as an elastic material using a copper spring as an elastic material, and the copper sheet is easy to easily lose its elasticity. The use time has a long failure rate, and it is now basically eliminated. Instead, it is replaced by a capacitive keyboard. It is based on the keyboard of the capacitive switch. The principle is to generate a change in capacity between the distance between the electrodes, temporarily forming the conditions allowed by the oscillating pulse. In theory, this switch is non-contactless, and the wear rate is extremely small or even neglected. There is no hidden danger of contact with poor contact, with a small noise, easy to control the hand, can make high quality keyboard, but the process is more machinery complex structure. There is also a keyboard for the industrial computer for complete sealing, using tap film buttons, only applicable to special occasions.
The shape of the keyboard is divided into standard keyboard and ergonomic keyboard. The ergonomic keyboard is separated from the left-handed keypad of the standard keyboard and the left-right blocks specified by the finger. The two major sections of the right-hand key area are left and right, form a certain angle, so that the operator does not have to conscious. The clamping arms, maintains a natural form, which is named Natural Keyboard by Microsoft, which can effectively reduce the misstolence rate of the left and right handles for habits. "G" and "h". Some ergonomic keyboards also intentionally increase the common keys such as space bobes, and increase the hand pallets in the lower part of the keyboard, give the previous hanging wrist to support, reduce the fatigue caused by the long-term suspension of the wrist. These can be considered as humanized design. Keyboard construct the housing of the parsing keyboard. At present, the keyboard of the desktop PC computer uses the active keyboard, the keyboard as a separate input component, has its own housing. The keyboard panel is suppressed according to the grade, and the bottom of the partially high quality keyboard uses a thicker steel plate to increase the texture and rigidity of the keyboard, but this will undoubtedly increase the cost, so many cheap keyboards directly use the plastic base design. . Some keyboards use plastic dark hooks to secure the keyboard panels and bases to achieve no metal screws. Therefore, be careful to avoid damage when decomposition. In order to adapt to the needs of different users, the bottom of the keyboard is provided with a folded support pin, and the support pin can keep the keyboard to keep a certain inclination, and different keyboards provide a single-segment, double or even an angle adjustment. Conventional keyboard has CapSlock (alphabetically smaller lock), Numlock (Digital Keyboard Lock), ScrollLock three indicators, and the current state of the flag keyboard. These indicators are typically located on the upper right corner of the keyboard, but there are some keyboards such as ACER's Ergonomic KB and HP wish to install the keyboard with a keycap built-in indicator, which can easily determine the current state of the keyboard, but the process is relatively complicated, so large This design is not used in some ordinary keyboards. Regardless of how the keyboard form changes basic button alignment or remains substantially constant, it can be divided into a main keyboard area, a digital auxiliary keyboard area, an F-key function keyboard area, a control keypad, and a shortcut connection is added to the multi-function keyboard. The keyboard circuit board is the control core of the entire keyboard, which is located inside the keyboard, mainly as a button scanned identification, encoding, and transfer interface. The interface of the keyboard has an AT interface, the PS / 2 interface and the latest USB interface. The high-end brand is mostly using the PS / 2 interface. The earliest is also known as "small mouth", but more and more new motherboards have begun to provide PS. / 2 Keyboard interface. And compatible machine, especially older motherboards, often provide AT interfaces, also known as "big mouth", and fortunately, there is a large and size keyboard conversion connectors in the market. The price is only a few dollars in the market. It solves two interfaces in one fell swoop. Keyboard compatibility problem. As an emerging structure, some companies quickly launched the keyboard of the USB interface, the USB interface is just a selling point, and the improvement of performance is very effective. It is willing to try the USB port. Friends can consider. The reverse surface of the keycap can be seen that the bond piston is directly related to the life of the keyboard, and the friction coefficient is directly related to the touch of the button. The keyboard is one of the most stupid inventions in history! Do you know what QWERTY is? It refers to the first six letter buttons of the first line of the keyboard. Have you discovered this six letters and other 20 letters on the keyboard to increase the difficulty of the knocking? Since this is this, why use this arrangement? Let's find the answer below.
