Membrane switches with embedded LEDs and windows:

Membrane switches with embedded LEDs

SM Technology makes embedding LEDs into the membrane switch design possible. LEDs are either mounted on LED circuit layers with flex-tails (see Fig. 1), or directly on the bottom circuit layer. In this case a graphic overlay must be embossed over the LED (see Fig. 2). The most commonly supplied LEDs are red, green, and yellow. Bicolour, blue, and other LEDs are also available. Please refer a request for non-standard LEDs to us (SMD 1206 series are the best for mounting).

Fig. 1

Principle of a membrane switch with LED (without embossed graphic overlay)

Fig. 2

Principle of a membrane switch with LED (with embossed graphic overlay)

Membrane switch with display windows

LCD and LED displays can be installed behind a membrane switch. Therefore, windows are made in a graphic overlay. The other layers have cut-outs in the position of the window.

Example of a membrane switch with LED and windows

To enhance clarity over the windows a graphic overlay of a matt or textured film must be printed over the window with a gloss coat. Windows on graphic overlays of a gloss film stay without a print; on the other hand, the other gloss surface is textured with ink. On request, we can print the display windows on the back of the overlay material with transparent coloured ink (red, green, blue, etc.).

Example of a membrane switch with LED and windows

Presentation of membrane switches with embedded LEDs and windows:

Example of a membrane switch with LED and windows Example of a membrane switch with LED and windows

TT Klávesnice, a.s., Hruškové Dvory 56, 586 01 Jihlava, CZ

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