A 4K projector is a type of video projector that displays images with a resolution of 3840 x 2160 pixels, which is four times the resolution of 1080p projectors. This higher resolution provides sharper and more detailed images, making it ideal for home theaters, presentations, and large-screen viewing experiences. These projectors use advanced technology, such as DLP or LCD, to produce vibrant colors and high contrast. Many 4K projectors also support HDR (High Dynamic Range), enhancing the viewing experience by providing a wider range of colors and brightness levels.