| 摘要 |
A light valve apparatus in which a first lens array, a second lens array, and a light valve are arranged sequentially from an incident light side, and a focal length of each of the microlens elements for the first lens array is set shorter than a focal length of each of the microlens elements for the second lens array. The respective microlens elements of the second lens array are adapted to form a real image, corresponding to an imaginary object on a focal point of the respective microlens elements of the first lens array, on corresponding pixels of the light valve. A plurality of very small light source images corresponding to the light source are formed by the first lens array, and light emitted from the plurality of very small light source images are incident upon the respective microlens elements of the second lens array such that the images are projected onto the pixels of the light valve. Therefore, since the light incident upon the openings of the light valve can be increased without thinning an incident side glass substrate of the light valve, the substantial aperture ratio of the light valve apparatus may be improved. When the light valve apparatus of the present invention is used for a projection display system, projected images are significantly brightened, and if the light valve apparatus is utilized in a view-finder system, not only is the brightness of displayed images improved, but it also becomes possible to reduce the power consumption of the system.
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