Product category:
LCD Modules
News Release from: Sharp Microelectronics Europe | Subject: LQ121S1DG64 etc antireflection TFTs
Edited by the Electronicstalk Editorial
Team on 17 November 2006
Industrial TFTs reduce reflection
New antireflection technology reduces reflections to 0.2% of the incident light as well as increasing the mechanical stability of the display.
Recently developed low-reflection technology from Sharp offers two advantages at the same time for the latest generation of industrial TFTs: an almost total extinction of disruptive light reflections plus increased stability The design of the displays is based on the Strong2 model, which was launched at the start of the year
This article was originally published on Electronicstalk on 16 May 2003 at 8.00am (UK)
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These have been extended with the addition of a standard 2mm layer of acrylic glass.
The low-reflection displays are also available with 0.7 to 6mm-thick acrylic glass, depending on customer requirements.
The acrylic glass has a special antireflection coating which works according to the lambda/4 antireflection principle: incident light is reflected directly onto the screen surface and onto the surface of another layer which is a quarter of a wavelength below the first one.
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As light travels through the top layer, there is a double phase displacement of the light wave in relation to the wave directly reflected on the surface.
The phase difference of half a wavelength creates an extinguishing top surface and therefore cuts out almost all reflection.
The new display structure and the lambda/4 antireflection reduce the amount of reflection to just 0.2% of the incident light.
By contrast, with conventional anti-reflection technology, around two% of the incident light is reflected back.
The low-reflection TFTs are based on the Strong2 product line, with which Sharp has set new standards in terms of the quality of industrial displays.
This product line is distinguished by even better brightness and contrast values, as well as increased robustness in thermal behaviour and better resistance to mechanical stress.
Innovations in the area of activation and the selection of glass and the design of the backlight system have made it possible to increase the display brightness to 450cd/m2 with a contrast ratio of 600:1.
Background lighting for the Strong2 modules is provided by long-life CCFL tubes with a service life of at least 50,000 hours in continuous operation.
By comparison, to date standard backlights have only been able to achieve half-life periods of 25,000 to 40,000 hours.
Strong2 TFTs can withstand acceleration of up to 2g in a vibration test.
In the standard impact test, the displays can withstand acceleration of up to 50g without damage.
New materials for polarisers and liquid crystals also provide an extended operating temperature range from -30 to +80C.
In addition, the various display models from Sharp offer high mechanical and electronic compatibility.
If, for example, a panel with better anti-reflection properties is required for a particular application, a low-reflection module of the same size can be subsequently installed without any time-consuming and cost-intensive adaptation of the design.
The new TFT LCD panels are available on a long-term basis in accordance with industry specifications.
The new industrial low-reflection TFTs are particularly suitable for all solutions that require excellent robustness plus good readability where there is strong incident light from outside.
Typical areas of application include mobile measuring and diagnostic equipment for medicine, industrial and environmental analysis, information terminals and different automatic vending machines located inside and outside, industrial vehicles and control units for factory systems.
The lineup featuring low-reflection technology initially comprises three displays measuring 10.4, 12.1 and 15.0in.
Samples are already available via Sharp sales offices and distribution partners worldwide.
Series production of the 12.1in LCD (LQ121S1DG64) is scheduled to start in Q1 2007.
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