Resolution Is The Key To Success14th February 2023
Share This Post
Share This Post
Resolutions – Where size does matter
TFT displays are so much a part of our modern lives, from our Ultra HD televisions, down to the displays on our wrist watches and other wearable or portable equipment. Each display has 2 features which define its physical shape (aspect ratio) and clarity or sharpness of the displayed image. (Screen resolution is defined in pixels and calculated as width x height). This article looks back at how we got to the super high-resolution screens we now take for granted and how they relate to the displays used in the industrial sector. There is also a handy little aide memoir of names and sizes.
The personal computers first introduced in 70s & 80s were designed to use television receivers as their display devices. This meant that the available resolutions were dependent on the television standards in use at the time. Picture sizes were usually limited to ensure the visibility of all the pixels and the actual usable picture area was somewhat smaller than the whole screen.
One of the drawbacks of using a classic television was that the computer display resolution is higher than the TVs could decode. Many users upgraded to higher-quality televisions with S-Video or RGBI inputs that helped eliminate chroma blur and produce more legible displays.
Early computer manufacturers, like Commodore, Apple and Atari, developed interlacing techniques to boost the maximum vertical resolution, but these outputs were still only suitable for showing graphics rather than text, which suffered from flicker effects.
Video graphic array (VGA)
IBM later introduced its own multi-colour, graphics chips (video graphics array or VGA) which provided a 640 x 480 x 16 colour resolution which was the standard for computer monitors from 1990 until around 1996. The Increased power of operating systems and applications led to increased demand on picture quality and size, which spawned the SVGA standard (typically 800 x 600 with 24 bit colour).
EXTENDED GRAPHICS ARRAY (XGA)
Around 2002, 1024 x 768 (extended graphics array or XGA) became the de facto standard with many applications and websites being redesigned around this standard.
The development of lower cost TFT monitors made the 5∶4 aspect ratio resolution of 1280 × 1024 (SXGA) more popular for desktop usage during the latter part of the decade. CAD users, graphic artists and video game players were running their computers at 1600 × 1200 resolution (UXGA) or higher such as 2048 × 1536 (QXGA) if they had the necessary equipment. In recent years, the 16:9 aspect ratio has become more common in notebook displays and is now finding its way into industrial applications.
The main driver to this fast development has been consumer or mass market products, such as phones, TVs and monitors. The industrial sector has always had to piggyback off the developments from the glass manufacturers, but high quality colour TFT monitors are increasingly being used in applications like:
-Automotive – Widescreen aspect ratios for dashboard displays;
–Drone monitoring – Increasing requirements for higher resolutions and wide screen aspect ratio, as reliant on the drones camera lens angle and aspect ratio
The table below is designed to provide a quick reference guide to names, sizes and aspect ratios of displays currently available in the industrial sector.
|QQVGA||Quarter Quarter Video Graphics Array||160||128|
|QVGA||Quarter Video Graphics Array||320||240|
|WQVGA||Wide Quarter Video Graphics Array||480||272|
|HVGA||Half Video Graphics Array||480||320|
|VGA||Video Graphics Array||640||480|
|WVGA||Wide Video Graphics Array||800||480|
|SVGA||Super Graphics Array||800||600|
|WSVGA||Wide Super Graphics Array||1024||600|
|XGA||Extended Graphics Array||1024||768|
|SXGA||Super Extended Graphics Array||1280||1024|
|WXGA||Wide Extended Graphics Array||1280||800|
|UXGA||Ultra Extended Graphics Array||1600||1200|
|WSXGA||Wide Super Extended Graphics Array||1680||1050|
|WUXGA||Wide Ultra Extended Graphics Array||1920||1200|
sign up for our newsletter
Enter your email address below
LET’S MAKE THIS EASY. CALL 01929 555 700
why choose relec?
Our aim is to get back to you with an initial response within the hour.
Attention to detail
We pride ourselves on getting you the right product, at the right price and on time.
We are constantly looking for latest technology and products for your applications.
It’s not just about the product. Our service goes way beyond the norm.
We want to make your life as simple as it can be. Call us to find out what we can offer.