Shopping for a new TV, and seeing terms like 4K, HDR, and Dolby Vision everywhere on product sheets, without really knowing what they concretely change? You're far from alone. These three terms describe different things, and understanding each one helps you choose a device that truly matches what you watch.
What exactly is 4K?
4K describes the image resolution, which is the number of pixels displayed on the screen. A 4K TV displays approximately 8 million pixels, four times more than a Full HD TV. Concretely, this means a sharper and more detailed image, especially on large screens where the lack of detail is more noticeable.
HDR, the real visual difference
HDR, or High Dynamic Range, affects colors and contrast rather than the number of pixels. An HDR TV displays brighter whites, deeper blacks, and a wider range of colors. It's often HDR, more than resolution, that makes the real visual difference when you compare two TVs side-by-side in a store.
Dolby Vision, an improved version of HDR
Dolby Vision is a proprietary HDR format, developed by Dolby Laboratories. Unlike the basic HDR10 format, Dolby Vision uses up to 12-bit color with dynamic metadata, which allows brightness and contrast to be adjusted scene by scene rather than for the entire film. The result: an image even more faithful to the director's intention.
HDR10 vs. Dolby Vision: which to choose?
HDR10 is an open standard that almost all 4K TVs support, with no licensing fees for manufacturers. Dolby Vision requires certification and costs more to integrate, but it generally offers better image quality thanks to its dynamic metadata. Many recent TVs support both formats, giving you the best of both worlds depending on the content you watch.
Why it changes your home viewing experience
These technologies only make sense when the content you watch also supports them. Netflix, Disney+, and several other platforms offer content in Dolby Vision, but your TV must be compatible to enjoy it. If you're still hesitating between a new smart screen or keeping your current TV with an external box, our article TV Box vs. Smart TV: which to choose in 2026? will help you decide. And if budget is a concern, our article Why choose an open box TV? explains how to save without sacrificing these technologies.
Frequently Asked Questions
Which is better between HDR and Dolby Vision?
Dolby Vision is an improved version of HDR, with dynamic metadata that adjusts the image scene by scene. Both improve quality compared to a non-HDR TV.
What is the difference between 4K and HDR?
4K concerns image resolution, i.e., the number of pixels. HDR concerns colors and contrast. A TV can be 4K without HDR, or HDR without being 4K, even if the combination of the two gives the best result.
Is Dolby Vision really worth it?
If you watch a lot of streaming content on platforms that support it, yes. The difference is especially visible in scenes with strong contrasts, such as dark scenes with light sources.
What does my TV need to enjoy Dolby Vision?
It must be Dolby Vision compatible directly, and the content you watch must also be available in this format. Always check the specs before purchasing if these technologies are important to you.
Want to shop for a TV that supports these technologies without paying full price? Take a look at our selection of open box TVs, a great way to get a 4K HDR screen at a reduced price.
