Nowadays, the world is buzzing about 8K, and it has become a major trend in the display industry. However, instead of focusing on 8K today, we're going to take a closer look at 4K — a technology that has been around for a while but is still often misunderstood. Many people believe that what they see as 4K might actually be "fake" 4K.
4K refers to a resolution of either 3840x2160 or 4096x2160. Any signal with a width less than 3840 or a height less than 2160 cannot be considered true 4K. Additionally, even within 4K, there are differences such as frame rates (like 30Hz vs. 60Hz) and color spaces (YUV vs. RGB), which can significantly affect image quality, especially on high-end displays.
Don't worry about 8K — the 4K you see might be fake.
For example, HDMI 1.4 only supports up to 30Hz, while HDMI 2.0 can handle 60Hz. The difference between 30Hz and 60Hz isn’t just in numbers — higher frame rates lead to smoother motion, fewer motion artifacts, and a more realistic visual experience. This makes 60Hz much better for fast-moving scenes, like sports or action movies.
The increase in resolution has a huge impact on image quality.
When it comes to 4K content, achieving 60Hz is more challenging due to the large amount of data involved. For instance, the pixel clock for 1080p at 60Hz is around 148MHz, while for 4K at 60Hz, it jumps to 594MHz. This requires more bandwidth, better transmission capabilities, and stronger processing power — making 4K at 60Hz much more demanding than lower resolutions.
The editor teaches you how to distinguish between true and false 4K
So, how can you tell if your 4K device is real or fake? Let’s break it down.
First, check the product's specifications. If the resolution listed doesn't meet 3840x2160, it's not a genuine 4K display. Keep in mind that specs can be misleading, so always double-check. Another important factor is the HDMI version. If the device doesn't have an HDMI 1.4 or newer port, it likely can't support true 4K.
Second, make sure the product supports H.265 (also known as HEVC) video format. This format was developed specifically for 4K content and allows for efficient playback of high-resolution videos. If your device doesn’t support it, it's likely not a real 4K display.
There is a significant difference between the two in the arrangement of the pixel blocks.
A more straightforward way to identify a real 4K display is to look at the pixel configuration. If the product specification mentions "RGBW," it's likely a fake. RGBW adds a white pixel to the traditional RGB setup, but this reduces the effective number of pixels. Instead of reaching the full 3840x2160, it may only offer around 2880x2160, which is roughly 2 million fewer pixels than a true 4K display.
Write to the end:
Although 8K is gaining attention and is seen as the future of display technology, it's still far from being widely adopted. Meanwhile, 4K itself is not without issues — many products claim to be 4K but fall short in reality. That’s why it's important to know how to spot a fake. By understanding the technical details and checking the right specifications, you can avoid being misled and enjoy the real visual experience that 4K has to offer today.
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