Display Technology
A comprehensive process to select your next display assembly
While it is possible to buy off-the-shelf display components and assemble your display system in-house, using an expert company can ensure you’re purchasing and installing a fit-for-purpose product that matches your desired usage and can stand the test of time, explains Alex Munden, sales engineer at Display Technology
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ifferent projects require specific specifications. There’s no one- size-fits-all display assembly for all applications. Some usages like outdoor applications require the use of high brightness TFT panels while others, mostly assemblies designed for indoor use, are more suited to standard brightness. Certain applications in extreme conditions require impact-resistant glass and ruggedised bonding methods.
For touch panels, environment-specific tuned touch sensors are a must in applications that are likely to be used when wet, in the presence of contaminations or in situations where EMC noise impact is a concern. Display Technology has a deep understanding of what features are most important to certain market sectors. Our experience in delivering display solutions to companies is vital for selecting and deploying the right display assembly to meet your business’s unique needs.
Medical case study
Display Technology’s selection expertise was recently put to the test for a client in the medical sector. Applications in the medical sector require high levels of readability as health professionals need to glance at and read information quickly. That’s why a bright, 10.1” high-resolution TFT panel was selected, featuring a sharp FHD resolution to ensure complete clarity for text, numbers and graphics. A key requirement in the medical sector is reliable operation with surgical gloves. Hence why this display was coupled with a state-of-the-art PCAP (projected capacitive) touch sensor. A PCAP touchscreen is vital for highly responsive touch controls, as opposed to resistive touch panels of the
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yesteryear. As medical applications require users to quickly access key functions and respond rapidly to emergencies, lightning-fast touch performance was a key requirement.
This application required the use of an advanced touch controller to finely tune the touch sensitivity to work reliably with gloved touch operation. Display Technology’s in-house firmware engineer also tuned the touch panel to function well under wet
environments, as medical professionals would need to operate their equipment in the presence of contaminants such as blood and saline. To ensure safe and reliable operation, Display Technology identified this display assembly required unfaltering robustness. The client also required a product that would
be available for 5-10 years at a minimum. They selected components with high material longevity and used a 3mm thermally toughened cover lens to increase front surface robustness and protect the system from impacts. This cover lens was selected as per the client’s drawing, with three ink printed colours
onto the rear face to provide the necessary visual look desired for their perfect display assembly. If needed, Display Technology has the capacity to expand this to four different colour layers for improved aesthetics. To improve the display’s impact resistance the experts opted to optically bond the cover lens and touch with the display component. Optical bonding is the process in which a thin layer of high-performance silicone OPTα-GEL is applied between the glass lens and the TFT panel. This ensures the display assembly is rugged, reduces the reflection of light on the surfaces, increasing the readability. According to the firm, Display Technology’s client was extremely happy with their display assembly and noted it was perfectly crafted for the challenges faced in the medical sector. The display tech provider used their knowledge of display technology to identify and solve key issues and ultimately saved their client time and money designing their display solution themselves.
www.DisplayTechnology.co.uk Components in Electronics September 2021 31
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