The buttons on the flat membrane switch, which indicate the position, shape and size of the key body in different colors, are more common in the initial stage of the membrane switch. Stereo membrane switch: Usually, the button on the membrane switch only uses color to express the position, shape and size of the key body. In this way, the flat membrane switch can only recognize the accuracy of the operation by the operator's vision. Since there is no appropriate feedback information indicating whether the finger is pressed in the effective range of the switch, the switch is operated, thereby affecting the confidence and operation of the whole machine monitoring. speed.

A membrane switch that makes the key body slightly convex, slightly higher than the panel, and constitutes a three-dimensional shape, is called a stereo key switch. The stereo key not only accurately gives the range of the key body, but also improves the recognition speed, makes the touch of the operator more sensitive, and also enhances the decorative effect of the appearance of the product.