Capacitive touch switch, switch circuit and key system

Abstract

The invention discloses a capacitive touch switch. The capacitive touch switch comprises an upper electrode piece and a lower electrode piece arranged oppositely, a button arranged above the upper electrode piece, and a button arranged on the upper electrode piece and the lower electrode piece. The insulating spacer between; after the upper electrode sheet and the lower electrode sheet are energized, the button pushes the upper electrode sheet to move or elastically deform to the lower electrode sheet according to its pressed condition, so as to change the The distance between the upper electrode sheet and the lower electrode sheet changes the capacitance between the upper electrode sheet and the lower electrode sheet. The invention also discloses a switch circuit and a key system. The invention does not need to use switch contacts in the light touch switch, not only retains the finger touch of the light touch switch, but also improves the service life and sensitivity of the light touch switch, and has low cost.

Description

technical field [0001] The invention relates to the field of switches, in particular to a capacitive touch switch, a switch circuit and a key system. Background technique [0002] At present, there are two types of key switches commonly used on TV sets: one is a light touch type, and the other is a touch type. Tact switches are the most widely used on TVs, but in general, users use remote controls to control TVs and rarely use buttons, so the frequency of use of buttons is very low. The main component of the buttons is the contact of the tact switch. Long-term inactivity is easy to attach some laminates, or poor contact due to air corrosion, resulting in key failure. Another kind of touch switch has only been used in the last ten years. Although the problem of poor contact of the light touch switch has been solved, it is easy to cause misoperation due to the weak touch of the user's fingers when using the touch switch, and the cost is also relatively low. The light touch s...

AI Technical Summary

Problems solved by technology

Tact switches are the most widely used on TVs, but in general, users use remote controls to control TVs, and rarely use buttons, so the frequency of using buttons is very low. The main component of the buttons is the contact of the tact switch. Long-term inactivity is easy to adhere to some laminates, or poor contact due to air corrosion, resulting in key failure

Another kind of touch switch has only been used in the last ten years. Although it has solved the problem of poor contact of the light touch switch, it is easy to cause misoperation due to the weak touch of the user's fingers when using the touch switch, and the cost is also relatively low. The light touch switch is high, so it is restricted in use

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