Before explaining the difference between True or Native 4K Vs simulated and upscaled 4K we must first understand what a 4K resolution is. 4K, also known as Ultra HD, refers to a resolution of 3,840 x 2,160 pixels. That’s four times as many pixels than in a full HD TV, a total of about 8.3 million pixels.A Native, or True, 4K projector will deliver all 8.3 million pixels and each pixel is individually addressable on the screen. Sony 4K projectors for example have 3 x 4K panels, each with 8.3 million pixels providing a True 4K resolution on the screen for breathtaking image quality. A simulated UHD projector will provide a 4K image at more of a budge price. Instead of using an expensive chip or panel that contains all the 8.3 million pixels, they use 1080p or Full-HD panels and chips. The projector then rapidly shifts each pixel on the screen providing a faux 4K resolution. Still a very good image at a fraction of the price of a Native 4K projector.