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Common problems in the design of thin film switches

Release time:

2023-06-06 08:45

The buttons on membrane switches are commonly used in the initial stage of membrane keyboards to indicate the position, shape, and size of the key body with different colors. Stereoscopic thin film keyboard: Usually, the buttons on a thin film keyboard only use color to express the position, shape, and size of the key body. In this way, the accuracy of the operation can only be recognized based on the operator's vision. Due to the lack of appropriate feedback information indicating whether the finger is within the effective range of the switch to activate the switch, it affects the confidence in monitoring the entire machine and the speed of operation.
Thin film circuit boards have many advantages, such as good flexibility, light weight, stable transmission performance, impact resistance, low price, and environmental protection. The special price is only half of that of regular rigid circuit boards (PCBs). Used in the button area of the product, it can reduce product costs. Film circuit manufacturers will introduce the characteristics of commonly used flat film keyboards below:
The common problems in the design of thin film switches and thin film circuits are as follows:
1. The shrapnel of the membrane switch drum button needs to be placed properly and cannot be offset, otherwise it will affect the operation of the button until it becomes invalid.
2. Color issue: The modulation ratio of ink is the main reason for serious color deviation, and there are also strict color requirements. The color range is too small, and these are factors that are difficult to control in any industry. In terms of cost control for enterprises, achieving a very small color range requires extremely high costs. As the cost of the product increases, the unit price of the product will also increase accordingly, which is also difficult for customers to accept. The range of colors should be within a reasonable range.
3. The drum position of the button needs to be molded to a suitable position, otherwise it will affect the aesthetics of the button. The back glue is not sticky, in addition to the selection of raw materials, it is also necessary to confirm the shape of the prototype. If the prototype has grooves, it is necessary to choose high-quality adhesive. The choice of adhesive for the back should be appropriate.