« Reply #1 on: August 10, 2018, 01:18:37 PM »
Membrane Keyboard
• A membrane keyboard is a computer keyboard whose "keys" are not separate, moving parts, as with the majority of other keyboards, but rather are pressure pads that have only outlines and symbols printed on a flat, flexible surface.
There are two types of membrane-based keyboards:
1. Flat-panel membrane keyboards
• Flat-panel membrane keyboards are most often found on appliances like microwave ovens or photocopiers.
•A common design consists of three layers.
a. The top layer has the labels printed on its front and conductive stripes printed on the back.
b. Under this it has a spacer layer, which holds the front and back layer apart so that they do not normally make electrical contact.
c. The back layer has conductive stripes printed perpendicularly to those of the front layer.
2. Full-travel membrane keyboards:
• Full-travel membrane-based keyboards are the most common computer keyboards today. They have one-piece plastic keytop/switch plungers which press down on a membrane to actuate a contact in an electrical switch matrix.
« Last Edit: November 07, 2018, 10:44:33 AM by MysteRy »
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