| Membrane Switches |
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Membrane keyboard consists of one or several keys within a flat panel. Each key consists of an open contact between two tracks or wires that exit at the back of the panel in the form of a tail that can then be connected directly to a PCB.Each key is graphically represented on the top panel and to operate all that is required is a simple press of a finger on the designated key to momentarily short the contact. |
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| Tactile |
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Tactile Keyboards can be produced either with a glass epoxy PCB or with the flexible printed Circuit film. It gives an excellent feedback, more life can be achieved with a gold plated dome. |
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| Non-Tactile |
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Non-Tactile Keyboards can be produced either with a glass epoxy PCB or with the flexible printed Circuit film. Non-Tactile keyboards does not give any feedback but it can withstand more number of operations as compared to Tactile keyboard. |
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| Polydome Keyboards |
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Polyester dome keypads are fabricated by embossing domes in a layer of polyester. Circles of conductive link are printed
under the polyester sheet and will be used as electrical contact for each dome. Each dome will have a silver disk printed
on its concave surface. The switches have a travel slightly longer than that of the metal domes. |
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| Capacitive Keyboards |
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Capacitive Touch Switches are extremely durable, The switch works by detecting the presence or absence of a conductive object, such as a finger, by measuring changes in capacitance. With capacitive touch switches, we can incorporate multiple functions, including LED drivers and backlighting, along eith buttons, sliders, switches, touch pads. |
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| Illuminated Keyboards |
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Illuminated keyboards are designed either by a high quality illuminated short travel switch or by the means of the Electro Luminescrent lamp. Short travel keys increases the overall height of the keyboards but offer a crisp feel, where as the EL lamp reduces the height of keyboard, but requires an additional inverter circuit. |
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| EL Membrane Switches |
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| Membrane switches illuminated by providing the Electroluminescent backlighting lamps. It is created by sandwiching a layer of electroluminescent material such as phosphors between two layers of conductors. One of the conductive layers is transparent so that phosphors emit light when a DC Voltage is applied to them. |
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| Advantages |
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• No filament to break – never fails to light!
• Negligible heat emission
• Highly visible in darkness, smoke, fog etc.
• Does not impair night vision
• Low power consumption
• No hazardous materials
• Maintenance Free
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