Display apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKatsumi Kurematsu, Toshihiro Sunaga
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Abstract
It is an object of this invention to provide a high-quality, high-precision, large-screen display apparatus which can obtain a sufficient light beam reception angle with respect to an image display unit, improve imaging performance, and obtain a thin structure. There is provided a display apparatus for obliquely projecting light from an image display unit onto a projection optical system, wherein the projection optical system includes a plurality of aspherical curved mirrors and projects an image without distortion (1.2% or less).
Claims19
A display apparatus comprising:
- at least one image display means;
- and
- a projection optical system for obliquely projecting image light from said at least one image display means onto a projection surface,
- wherein said projection optical system includes a plurality of aspherical curved mirrors and projects the image light without distortion (not more than 1.2%).
A display apparatus comprising:
- at least one image display means;
- a projection surface;
- and
- a projection optical system for obliquely projecting image light from said at least one image display means onto said projection surface,
- wherein said projection optical system includes at least six aspherical curved mirrors and a plurality of plane mirrors which are sequentially arranged from the image display means side.
A projection optical system for obliquely projecting light from image display means, comprising a plurality of aspherical curved mirrors, wherein an image is projected without distortion (not more than 1.2%.
Dependencies are inferred from the claim text.