Here at Projectorpoint, we sell ultra high-definition 4K display screens. But what is 4K and what exactly makes it different to high definition?
In this blog we will cut through the tech jargon and attempt to explain what exactly you are getting when you buy a 4K display.
High definition has been with us for years and it covers any screen that has a 1080p resolution. That is 1920 pixels by 1080 pixels. Now there's ultra-high definition (UHD) or 4K display too. And to qualify, 4K displays have to sport at least 8 million active pixels on its screen.
For screens such as TVs and displays, this resolution has been standardised to 3,840 pixels by 2,160 pixels. For larger screens, such those used in cinemas, this criteria has been raised to 4,096 pixels by 2,160 pixels. Essentially, then, it is four times the number of pixels found on a 1080p display and more than 23 times you get from an average, standard display.
But how is 4K different from 1080p in practical terms? Firstly, the image quality is that much sharper and can output a much clearer image than an HD display. This is because a 4K display holds four times the number of pixels in an area in which a 1080p HDTV holds one.
Due to the resolution being a lot higher than HD displays, more bandwidth is required for displays to transmit. The HDMI 2.0 connection standard was developed specifically to support 4K. The connection also brings a further benefit of being able to stream 2160p video at 60 frames per second. While old HDMI connections could work, it would not be able to stream at that framerate.
What's more, 4K displays are also able to take advantage of an upconverter. This enables them to display 1080p and 720p resolutions. However, what makes this upconverter so good, is that it uses edge smoothing and noise reduction algorithms. This enables the display to produce a sharper picture. While previous resolutions were less apparent in the clarity
When it comes to screen size, there’s a natural inclination to follow the old adage of “bigger is better”. And while in the majority of cases this is true, the reality of things is a bit more complicated. This guide looks at how to calculate the right dimensions for your space and use, and demonstrates where size really matters when it comes to display installations.
Room dimensions, the distance of any seating from the main display screen and the purpose of the room in question will all prove important when identifying the best screen size for your space.
When it comes to form, there’s a simple set of equations that offer an excellent base point for selecting the right screen size for your space. Every requirement will vary, however, AV professionals tend to use this guide - known as the 4/6/8 rule - to determine screen size in relation to where viewers are sitting or walking through. Here’s how it works:
The greatest distance a viewer should be away from the screen is no more than four, six, or eight times the image height depending on what the screen is being used for:
For finer details and more analytical work, viewers should be no further away than the four times the image height
For larger text, viewers should be no further away than six times the height of the screen
For more passive viewing – such as films or large images – the viewer should be no further away than eight times the image height
It’s not perfect and there are exceptions, but the 4/6/8 rule is a strong starting point to narrow down your hunt for the right screen.
With this initial gauge established, it’s time to look at the purpose of the room and its display screen: the function. This has a considerable bearing on the size of screen required.
For instance, a display in an office reception space serves a very different role to that of a display in a conference room or collaborative huddle space. While it might lo