The term "4K" originates from the approximate horizontal resolution of the format.
While technically distinct, the term "4K" is commonly used by consumers to refer to the UHD standard (3840 x 2160).
Abstract The term "4K" has become ubiquitous in the consumer electronics industry, representing the current standard for high-resolution displays in televisions, monitors, and digital projection. This paper provides an informative overview of 4K technology, defining its technical specifications, exploring the differences between various industry standards, and analyzing the impact of higher pixel density on the viewer experience.
The primary benefit of 4K resolution is increased pixel density. In a standard 1080p display, individual pixels become visible if a viewer sits too close to a large screen. With 4K, pixels are significantly smaller and packed more tightly. This allows for a closer viewing distance without visible pixelation, creating a more immersive visual experience.