Illuminating optical system, image display apparatus using same and image display method

A projection system comprising:

• an illuminating optical system including a light source which emits light and is disposed at a light emitting end of a light path and a light shape adjuster disposed on the light path which adjusts the shape of the light beam emitted by the light source so as to output a shape adjusted light beam;
• a light valve which forms a color image by turning pixels one of on and off according to an input image signal, the light valve disposed at an image forming end of the light path;
• a scrolling unit disposed on the light path between the illuminating optical device and the light valve, the scrolling unit receiving the shape adjusted light beam and scrolling the shape adjusted light beam;
• a colored light separator which separates the shape adjusted light beam emitted from the scrolling unit into color beams according to wavelength;
• and
• a pair of fly-eye lenses disposed on the light path between the colored light separator and the light valve which receive the scrolling color beams and focus the color beams onto a relay lens disposed on the light path between the pair of fly-eye lenses and the light valve and transmits to the light valve received color beams from the pair of fly-eye lenses,
• wherein the scrolling causes the color beams to be received by the light valve at different portions thereof.

A method of displaying an image, comprising:

• emitting a light beam;
• adjusting a divergent angle of the light beam so as to adjust a shape thereof;
• focusing the shape adjusted light beam onto a light valve and turning pixels of the light valve one of on and off according to a received image signal so as to form a color image;
• magnifying the color image;
• and
• projecting the magnified color image onto a screen.

A method of displaying an image, comprising:

• emitting a light beam;
• adjusting a divergent angle of the light beam so as to adjust a shape thereof;
• separating the shape adjusted light beam into a plurality of color beams according to wavelength;
• focusing the color beams onto a light valve and turning pixels of the light valve one of on and off according to a received image signal so as to form a color image;
• magnifying the color image;
• and
• projecting the magnified color image onto a screen.