Classified by working principle
1. The mechanical keyboard adopts a metal contact switch, which works by making the contacts conductive or disconnected. It has the characteristics of simple process, high noise, easy maintenance, strong rhythm when typing, and long-term use without changing the feel.
2. The plastic film keyboard is divided into four layers inside, achieving no mechanical wear. Its characteristics are low price, low noise, and low cost, but after long-term use, the texture may change due to material issues. Has occupied the vast majority of the market share.
The structure of conductive rubber keyboard contacts is connected through conductive rubber. Inside the keyboard, there is a layer of conductive rubber with a raised surface, and each button corresponds to a raised surface. When pressed, the lower contacts are connected. This type of keyboard is a transitional product from mechanical keyboards to thin film keyboards in the market.
4. Contactless electrostatic capacitive keyboards use a principle similar to capacitive switches, where changing the distance between electrodes causes a change in capacitance and drives the encoder. The characteristic is no wear and good sealing.
The keyboard has had 83, 87, 93, 96, 101, 102, 104, 107 keys, etc. The 104 key keyboard is based on the 101 key keyboard and provides three additional shortcut keys (two of which are duplicates) for the WINDOWS 9.Xp platform, so it is also known as the WINDOWS 9X keyboard. However, there are not many users who are accustomed to using the WINDOWS key in practical applications. The 107 key keyboard is a keyboard that adds three separate keys to fit Japanese input. In some systems that require a large amount of input of a single number, there is also a small number input keyboard, which basically separates the small keyboard of the standard keyboard to achieve the purpose of reducing size and cost.
