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Keyboard key conflict

Keyboard key conflict
When you press several keys on the keyboard at the same time, these keys can’t be reflected at the same time. This is called the keyboard key conflict. For example, you can imagine that when you press Ctrl-Alt-Del, the system can only receive the first two keys, and does not recognize that you pressed the Del key?
Of course, there is no such keyboard in reality. The keyboard that can’t press Ctrl-Alt-Del can’t be shipped at all, but other common key conflicts are not unusual. For example, there are often keyboards that can’t react to key combinations such as A-S-Space at the same time, so users will suffer greatly in FPS games.
???????For the problem of key conflicts, there are two completely different attitudes among computer users. Most people are unaware of the existence of key conflicts, until they encounter conflicts, and they cry out, “Why can he Do this action?”; and other people, especially some game masters, are tirelessly looking for “keyboards without key conflicts.” Both of these people are unclear about the reasons for the key conflicts.
???????The direct cause of key conflicts is the non-coding structure of the keyboard. In the February issue, we mentioned that today’s keyboards are almost all non-coded membrane contact keyboards. So what is a non-coded keyboard? We have not explained in detail in the topic. Below we will explain in detail the principle and structure of the non-encoded keyboard.
???????The traditional keyboard is a coded keyboard, each of which generates a unique key code when pressed, and is transmitted to the keyboard interface circuit through a proprietary set of wires. Due to the uniqueness of its line and code, the keyboard There is no problem with key conflicts, but the structure of the encoding keyboard is complex and is rarely used now.
???????The modern film contact keyboard, any button has two layers of film contacts, we take it apart and take a closer look picture , you will find that on any layer of film, the number of wires is far Less than the number of buttons, and each wire connects the contacts of multiple buttons at the same time, and any two wires of the upper and lower layers overlap at most on only one button. That is to say, the upper layer of the 1st wire may pass the 1, 2, 3, 4, 5, etc. buttons at the same time, and the lower layer of the 1st wire may pass the 1, Q, A, Z, etc. buttons simultaneously, and two The wires are only coincident on the 1 button.

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