Everything you need to know about 4K Ultra HD


According to recent studies conducted, nearly 50% of the television sets that possess screen size greater than 40 inches are being sold with 4K resolution.

And even more, half of the U.S. households are expected to have a 4K capable television set by 2025. So what makes 4K technology so interesting and popular that every other guy wants to have it?


What is 4K?


‘4K’ is a common term used for screen resolution/display resolution of  4096×2160 pixels. The term ‘ 4K ‘ comes from the horizontal pixel count of 4096. True 4K Resolution is Digital Cinematography Initiative standard which is used in cinema projection screens.

Now then you might wonder If 4K is a DCI standard then why does my new TV set has something like ‘4K  ultra high definition’ displayed on it. Here comes our hero  – UHD ~ Ultra High Definition.

As we know that most of the television screens feature an aspect ratio of 16:9 or 1.77:1. Hence to fit DCI 4K resolution technology into the television screen, manufacturers coined a new marketable term ‘Ultra HD’. There is no major difference between 4K and Ultra HD.

While a 4K screen would have a screen resolution of 4096×2160 pixels, Ultra HD screen would have a slightly lower screen resolution of 3840×2160 pixels.


Comparision between Ultra HD and Full HD


Full hd logo



Technically Ultra HD has screen resolution in the order of 3840×2160 pixels, and Full HD has screen resolution in the order of 1920×1080 pixels. To be more precise an Ultra HD screen would use whooping Eight million pixels( 8294400) to display any picture whereas Full HD screen would utilize Two million pixels (2073600). 

Ultra HD screen has four times more pixels than a Full HD screen. With higher pixel density Ultra HD Tv greatly enhances dynamic range and colour quality which results in higher contrast ratio. The quality of the picture displayed in Ultra HD screen would be extra sharp.

The Quality of picture would be so distinct that you can enjoy watching your television with the same detail even though you are just two-three feet away.


So That’s it?  Nope


In Consumer Electronic Show 2016, popularly known as CES, the ‘UHD alliance’ – a group of technology giants such as Netflix, LG, Sony, Dolby, THX, Universal Studios, Warner Bros (just to name a few), announced a new premium television standard known as ‘ULTRA HD PREMIUM’. 


Features Of Ultra HD Premium



Ultra HD Premium maximizes the benefits of Ultra HD by including a range of features coupled with Ultra HD resolution such as High Dynamic Range (HDR), Wide Color Spectrum, High Color Bit Depth and Multidimensional Immersive Audio.


High Dynamic Range: Traditional tv can’t display contrasts beyond a certain limit. High Dynamic Range or ‘HDR’ is the added ability of a panel to display high contrast images with more clarity.

Simply HDR can display the extremes of brightest white and darkest black. HDR thus delivers images with greater details even in shadows and highlights.


High Color Bit Depth: Television panels produce different colours by mixing RGB subpixels i.e. Red, Green, and Blue present inside every individual pixel. Now, most of the traditional tv supports 8-bit colour depth which can produce 16.7 million colours combinations.

Ultra HD premium which supports 10-bit colour depth. It can produce massive 1.07 Billion colour combinations and hence resulting in the smooth transition between different colours in the picture.


Immersive Audio: Sounds emitted from 5.1 channels ( five speakers and one subwoofer) or 7.1 channels (seven speakers and one subwoofer) are limited to the Horizontal dimension which limits movement of sound only in one plane.

Immersive audio is also termed as Multidimensional audio. Multidimensional audio uses both vertical and horizontal dimensional setup to create real-world three dimensional sound effect. Immersive audio thrills the viewer by connecting sound with the action on and beyond the screen.

With the help of Immersive audio 3D sound setup, viewers can feel real-world sound effects -Helicopter flying overhead on screen would create a realistic sound effect such that viewers would literally feel as if they are watching a helicopter flying over their head in the real world.


Coming up Next: QLED  Display and OLED Display


OLED – Organic Light Emitting Diode: OLED display is composed of electrically conductive organic materials placed in layers of thin films between two electrodes. When electricity is applied to electrodes, Oled emits light. 

OLED doesn’t require backlit thus it can be paper thin and can effortlessly achieve higher contrast ratio. OLEDs have better power efficiency than conventional LED. OLEDs can be fabricated on flexible plastic substrates leading to the production of Transparent as well as Bendable displays.


QLED – Quantum Dot Light Emitting Diode: Quantum Dots are the tiny nanoparticles of size – 109 meter. When light rays pass through Quantum dots, they emit colours in a different wavelength. These particles have the ability to emit various colours depending on their arrangement and physical size.

QLED displays have a thin film of quantum dots in between the display and backlit. QLED displays thus create stunning colour representation with impressive brightness.


Image Credits:

Featured Image:https://www.flickr.com/photos/[email protected]/6616140965

Full Hd logo: https://commons.wikimedia.org/wiki/File:Full_hd_logo.svg

Ultra HD Premium: https://www.flickr.com/photos/lge/24101278261