Anti-reflective, DÉCOR & Optical
The anti-reflective (AR) polariser is a clear film that is applied to the panel which reduces the amount of reflection created by external bright light.
In a typical TFT display there are three layers which light passes through. These are the cover lens, an air gap, (which can be optionally filled using an optical compound) and the LCD TFT panel.
Within each of these there is a reflection of approximately 5% under direct light, which equals a total of 15%. With the anti-reflective polariser, the reflection is reduced to approximately 9%.
Up to three layers can be applied to a single display to further reduce the reflection.
With 2 layers the reflection is reduced to 5% and with three layers the reflection is further reduced to 0.5%.
The AR polarisers can be applied to the top and bottom of the cover glass or both to further reduce reflection. With a display that comes with PCAP (projective capacitive touch panel) the AR polariser can only be applied to the top of the cover glass due to the sensor film.
Décor film is an individual design option that is available for displays fitted with 4 wire resistive touch panels. The décor film is a
customisable decorative surround, framing the TFT module.
The key features of the décor film mean that it can be mounted directly to the touch panel surface and allow the customer to have a flat product design. The film can be supplied with rounded corners for example or formed to a custom shape. The whole décor film can be customised to allow for different colours, cut outs, indentations and printing with your logo. This construction is based on a film-film-glass panel. Typically the décor film with a 4-wire resistive touch panel will have the upper ITO film manufactured larger than the bottom ITO glass. This allows for the extra space needed to bend the FPC if applicable.
The optical film (O-film) polariser increases the viewing angle up to 80° and improves grey scale inversion. Most TFT LCDs have narrow viewing angles. Without an O-film, viewing the display from an unconventional angle the image would either have a wash out effect (the lighter colours become more visible) or greyscale inversion (the darker colours become more visible).
Both of these effects make the display almost unreadable. With the O-film polariser applied to the TFT LCD from almost all angles it will show the ideal colour balance.
Callus on 01929 555800 and we can take you through all of the options in more detail.
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