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Working Principle Of Membrane Switch Panel

The membrane switch panel is an operating system that integrates key functions, indicator elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer and lower circuit. Press the membrane switch, the contacts of the upper circuit will deform downwards, and the pole plates of the lower circuit will be in contact. After you release the switch with your finger, the circuit loop will trigger a signal, causing the upper circuit contacts to bounce back, and the circuit disconnect.


Working principle of membrane switch panel


The main structure of the membrane switch panel is generally buttons and membranes. The thickness of the membrane switch is generally about 0.15mm, because being too thin or too thick will make it a bad product. The former will cause no resilience with insensitive switch, and the latter will be very laborious when pressing.


To make a flat switch, you need to choose a membrane. At this time, people tend to choose one with slightly higher thickness to ensure the product's long-time use. Another type of panel used in circuit contacts requires the use of a slightly thinner one. Only when the diameter of the bubble is relatively small, a thinner film will be chosen.


The overall structure of the membrane button is designed to be very simple. When you get a membrane panel, you can see the circuit and circuit board of the panel by only taking down the button cover.


When the button's shape is designed to be relatively large, it is best to choose a membrane with a thickness of 0.18 mm, because it can be used frequently and is not easy to damage, due to the moderate thickness and good rebound effect. If the thin membrane is selected with a quite thin thickness, it is easy to be penetrated, which makes the membrane switch insensitive.


The advantages of membrane switch panel's button are very numerous. Compared with other different types of buttons, this button has outstanding advantages its working principle, because it welds many conductive metal points on a conductive membrane, and each button can be connected to the same membrane switch. For the buttons of the membrane panel, different working circuits can achieve different control effects. The membrane panel has a barrier layer, the functions of which are playing a role a button and reacting with the panel when no one presses it, and connecting the circuit and complete the instructions when it is pressed.

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