Monday 6 January 2014

Display Resolutions: 4K UHD and Legacy Resolutions for Industry

As the ever changing state of digital screen technology moves forward, the core motivation for progression is screen size and definition quality. 4K UHD (Ultra High Definition) is a resolution of 3840 pixels × 2160 lines with an aspect ratio 16:9. The picture quality is twice the horizontal and vertical resolution of what we are used to in the now common HD format. In fact, the pixel count is 4 times that of HD. 2014 will be the year of the 4k UHD (Ultra High Definition) in LCD screens and Assured Systems has brought on board a selection of products for clients ready to move into the digital world beyond HD.

The NDiS B533 is a fanless digital signage player built around the new 4th generation of Intel Core processor family series (codename Haswell) and Intel HD 4600 integrated graphics controller. The use of this powerful new CPU family together with the integrated graphics capability means this computer can drive the demands of 4k resolution.

The benefits of resolution like this can seem to the consumer as superfluous as razor manufacturers adding yet another blade onto their shavers. After all, how much closer do you need to shave and how much sharper do our TVs need to be?  But the one noticeable fact in screen definition technology over the years has been, once a viewer progresses to a higher quality screen, a poorer resolution becomes noticeably inferior to the expectant eye. The improvement of quality and clarity with 4K UHD can't be denied though, take a look at this video from LG where the line between what's reality and what is 4K ultra-reality is blurred.


Assured Systems supply 4K resolution screens from LG. The LG 84WS70 is a 84" commercial grade LCD display designed for use in applications where 24/7 use and high reliability are a prerequisite. The screen features a full 3840 x 2160 UHD resolution and brightness of 500 nits, offering a bright platform with the crispest of content reproduction. Paired with the NDiS B533, the LG 84WS presents a truly spectacular digital signage solution that will wow any viewer.



So Are All Old Resolutions Now Defunct?

You would expect within the display production industry that adoption uptake of improved technology would be swift. However, with inter-dependency on content software and application use, the array of display resolutions which are catered for is extensive.

The above image contains many of the available display resolution options used today and the aspect ratio dimensions. 

To state the obvious, screens are used in virtually all industries and have hundreds upon thousands of applications. This presents a problem in standardising screen size and resolution, both for buyer guidance and for economies of scale in production. Therefore, a classification structure to inform users such as OEM designers has developed with a series of acronyms to define the display resolutions. For example, a screen in an aspect ratio of 4:3 with 800 pixels per line and 600 lines has SVGA (Super Video Graphics Array) display resolution.

The aspect ratio is expressed as the ratio of the physical picture width to the physical picture height. For a TV, manufacturers will want to present a widescreen content informed by how films are shot, for example 16:9. If you are a HMI designer however, the desired screen shape could be influenced totally by the application or industry; and the practicalities of a squarer screen could bring more benefits, but does that mean you would need a different aspect ratio? Just to confuse the issue, a screen's physical aspect ratio and the individual pixels' aspect ratio may not necessarily be the same. Two screens with an aspect ratio of 16:9 can have a physical shape which differs. An array of 1280 × 720 on a 16:9 display has square pixels, but an array of 1024 × 768 on a display has rectangular pixels. Therefore the physical shape of a screen would differ. So, to get the desired physical shape of a screen you would need to marry the desired aspect ratio with the correct pixel shape whilst factoring in your needs for screen clarity which would encompass pixel density. 

The above diagram shows physical shape depictions from differing display resolutions

Advancements in screen clarity, software design, website design, mobile technology, tablet technology amongst many other factors have added to the display resolution classifications over time. This wouldn’t become so confusing if display resolutions became defunct as new ones came along. Unfortunately, legacy display resolutions are a lot slower to disappear because:

- OEM designers will use the most practical, fit to purpose and cost efficient screens within an application.
- Input sources such as bespoke software may be designed in a certain display resolution
- Physical space constraints within OEM designs can dictate shape
- Imagery of application
- Shelf life of an OEM industrial design often lives longer than the initial screen used (replacements)

If you are an OEM designer, have an existing OEM design which needs a replacement screen or if you are implementing new software to an industrial application, you’ll need to source a viable screen with the correct display resolution. You’re also going to need assurance on operating temperature range and certification for ingress protection.  You will need the correct input and output channels configured and choose whether the screen should be panel mounted, open frame or desk mounted.

Assured Systems specialise in the production of industrial screens for OEM designs and applications in highly specific vertical markets such as marine and rail. We can assess your needs to find the correct screen solution having a more than extensive range of options which nears a bespoke service, without bespoke prices. Call our sales team now on 01785 87 90 50 for any advice on screen displays in digital signage or industrial use.

Assured Systems is a leading technology company offering high quality and innovative applied computing solutions to the embedded, industrial, and digital-out-of-home markets around the world via offices in Europe and the Americas.

Our impressive product portfolio includes a full range of Panel PCs, Human Machine Interfaces, Single Board Computers, Fanless Computers, Rugged Laptops & Tablets, Digital Signage solutions, LCD Displays & Touchscreens, Rackmount Servers, and Digital & Analogue Data Acquisition solutions. Our technology can be found in a diverse range of applications throughout our key verticals including energy, transportation, automation, process control, defence, medical, asset tracking, narrowcasting, gaming and multimedia.






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