Computer keyboard is the text information in the control information input computer channel. In fact, than teletype earlier time, the keyboard has appeared in computer auxiliary equipment, in the computer can still occupying a hall of the time, the main computer input device is a punched paper tape and punch card, of course, these tapes and cards may not be the hand a little bit wear out, they are used for the "tape" and "card punch" to pass through, and in two of these machines also have a very much like ordinary typewriter electric typewriters as input device. But relatively speaking, these two kinds of equipment are not part of a computer, this is and teletype different, so we do not use them as a part of the history of the development of computer keyboard.
The Classification of Computer Keyboard
According to the working principle, computer keyboards can be divided into mechanical keyboard, membrane keyboard, capacitive keyboard, conductive rubber keyboard. Mechanical keyboard as the name implies, it is composed of mechanical keys of the keyboard, with independent micro switches, and each switch is in the control of different signals. Its advantages include simple process, convenient repairing. However the feeling of touch is just in general with big noise and it is even easy to be worn. So almost no keyboard factory will produce this anymore. The membrane keyboard is characterized in that the button make less noise when pressing, each button below the elastic silicone waterproof can processing. If you accidentally fall on the keyboard, it is not easy to cause damage, so the membrane keyboard is also known as the silent waterproof keyboard. Capacitive keyboard is based on capacitive switch keyboard, the principle through the button to change the distance between the electrodes to generate capacitance changes, and temporarily formed by shock pulse allows the condition. This switch is a non-contact type of wear rate of small, even negligible, no bad contact potential, with little noise and it is in easy control of hand which can produce high quality keyboard, but the process is relatively mechanical structure is complex. Conductive rubber keyboard, its contact structure is connected by conductive rubber.
The Development of Computer Keyboard
At present, the computer keyboard is mainly being developed in product quality and its appearance, from the overall development analysis, there is no any break away from traditional input devices. Especially many keyborad factories just sale the OEM keyboard. Due to the functional elements of the limitations, the whole desktop computer products are still the focus of development, and various well-known brands are working on a more consistent with human mechanics to reduce wrist fatigue keyboard products.
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