Patent ID: 7336271

Claim:
An image display system including: a screen comprising a pair of substrates with transparent electrodes provided thereon, and a liquid crystal layer sandwiched between the substrates, the liquid crystal layer being capable of exhibiting a light transmissive state and a light scattering state, and an image-projecting unit for projecting an image on the screen; wherein when a voltage is applied across confronting transparent electrodes, the liquid crystal layer exhibits the light scattering state, and when no voltage is applied across confronting transparent electrodes, the liquid crystal layer exhibits the light transmissive state; wherein the screen is provided to face the image-projecting unit so that when the liquid crystal layer exhibits the light scattering state, an image projecting from the image-projecting unit can be focused on the screen to be visually recognized; wherein a repetition frequency of a combination of the light transmissive state and the light scattering state as a minimum repetitive unit can be set at a value in such a range that a viewer cannot recognize flickering of the image on the screen recognized; and wherein proportions of a time period (T 1 ) wherein the liquid crystal layer of the screen exhibits the light scattering state and a time period (T 2 ) wherein the liquid crystal layer of the screen exhibit the light transmissive state are set in one frame so that the viewer can simultaneously recognize the image on the screen and a scene behind the screen.