Capacitive type light touch switch, switching circuit and key system

Abstract

The invention discloses a capacitive type light touch switch. The capacitive type light touch switch comprises an upper electrode slice, a lower electrode slice, a button and an insulation spacer, wherein the upper electrode slice and the lower electrode slice are arranged oppositely; the button is arranged on the upper electrode slice; the insulation spacer is arranged between the upper electrode slice and the lower electrode slice. After the upper electrode slice and the lower electrode slice are powered on, the button pushes the upper electrode slice to move or elastically deform towards the lower electrode slice according to the pressed situation of the button, so that the distance between the upper electrode slice and the lower electrode slice is changed, and then the capacitance between the upper electrode slice and the lower electrode slice is changed. The invention further discloses a switching circuit and a key system. A switching contact is not needed in the light touch switch, the finger touch of the light touch switch is reserved, the service life of the light touch switch is prolonged, the flexibility of the light touch switch is improved, and cost is low.

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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