Flat panel touch screens and touch screen monitors can be enhanced by Optical filters for ruggedisation, sunlight readability, privacy, EMI shielding and thermal control. Applications for customised touch screens include military, medical and industrial markets, ATMs, gaming, public kiosks and other industrial touch screen monitor applications.
Optical Lamination
Assembled individually in the UK, in clean room conditions the touch screen display is bonded to filter materials, glass and plastics in a sandwich construction of index matched dry film adhesive.
Customisation Options
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Ruggedisation |
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Sunlight readability |
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Louver Privacy |
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Transparent Heater |
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NIR radiation control |
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EmiClare EMI shielding |
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A combination of above options can be included in each touch screen lamination. Full optical lamination can be undertaken on all types of solid flat touch screens up to a 62" diagonal.
Ruggedisation
Full optical lamination improves the impact resistance of the touch screen monitor and keeps an industrial touch monitor screen intact when broken, thus protecting the equipment and the safety of the user. Standard ruggedisation is to BS 6206: 1981 Class B and has the ability to withstand heavy repeated blows from objects such as bricks, hammers and crowbars. Impact performance of industrial touch screen displays can be further enhanced to Class A and above by using extra lamination layers and chemically toughened glass.
Ultimate strength in the final touch sensitive monitor is limited by the type and thickness of the touch screen along with its integration.
The laminations are tested for impact resistance, surface damage and penetration in accordance with ISO 6272 using a Falling Block Impact Tester 806/40. BS 6206 (UK standard): Class A impact resistance is achieved on the other touch screen lamination due to the extra filter material layers.
Sunlight Readability
Maximum contrast enhancement and "sunlight readability" is achieved by incorporating a neutral density circular polariser. Circular polarisers are well established as the most efficient form of contrast enhancement available with a 40:1 C.E. ratio. The washed out appearance of the display caused by ambient light reflected from the display is modified by the circular polariser as it passes through and traps the mirror image on reflection from the surface of the display. The signal from the display is allowed to pass through the filter and appears as a bright image against a dark background.
The best sunlight readability is achieved by combining both a circular polariser and a louver filter together.
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