Abstract: An illuminating unit and a display apparatus including the illuminating unit are provided. The illuminating unit generates and emits light to a display element of the display apparatus, and includes a light source; a uniformizing unit which uniformizes light from the light source and includes a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light from the uniformizing unit to emit the light to the display element and includes a plurality of condensing lenses sequentially arranged on the optical path, and the uniformizing unit and the condensing unit are arranged based on a width of one of a plurality of cell lenses forming the uniformizing lens and a width of an image displayed in the display element.

Abstract: An optical system is provided which includes an illumination system with a light source, a lens member which guides light from the light source, and a mirror member; an image unit on which an image is formed and on which light from the illumination system is incident; a projection system which magnifies and projects the image formed on the image unit; and a blocking unit which is mounted to the mirror member of the illumination system and partially blocks light from the light source that is directed to the mirror member.

Abstract: An illuminating unit and a display apparatus including the illuminating unit are provided. The illuminating unit generates and emits light to a display element of the display apparatus, and includes a light source; a uniformizing unit which uniformizes light from the light source and includes a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light from the uniformizing unit to emit the light to the display element and includes a plurality of condensing lenses sequentially arranged on the optical path, and the uniformizing unit and the condensing unit are arranged based on a width of one of a plurality of cell lenses forming the uniformizing lens and a width of an image displayed in the display element.

Abstract: A projection type image display apparatus includes: a cabinet; a screen which is provided in the cabinet; a display device which is placed inside the cabinet and forms an image; and an optical system which projects an image formed by the display device to the screen and comprises at least one mirror, a supporter for supporting the mirror, and a frame through which the supporter is fastened to the cabinet, all of the mirror, the supporter and the frame being disposed within a single interior space formed by the cabinet and the screen.

Abstract: An optical system is provided which includes an illumination system with a light source, a lens member which guides light from the light source, and a mirror member; an image unit on which an image is formed and on which light from the illumination system is incident; a projection system which magnifies and projects the image formed on the image unit; and a blocking unit which is mounted to the mirror member of the illumination system and partially blocks light from the light source that is directed to the mirror member.

Abstract: A projection-type display apparatus and a display method thereof are disclosed, the projection-type display apparatus including a coated portion which is formed on a surface of a substrate, and which scans a video onto a screen, and a patterned portion which is formed on another surface of the substrate in a serrated pattern, wherein the serrated pattern is formed on the substrate according to the surface area of the patterned portion and the depth of the serrated pattern. A serrated pattern is formed on a substrate forming a reflective portion to reflect a video on a screen, so the cooling surface area of the substrate is increased, thereby compensating for distortions in video scanned onto the screen.

Abstract: A projection-type display apparatus and a display method thereof are disclosed, the projection-type display apparatus including a coated portion which is formed on a surface of a substrate, and which scans a video onto a screen, and a patterned portion which is formed on another surface of the substrate in a serrated pattern, wherein the serrated pattern is formed on the substrate according to the surface area of the patterned portion and the depth of the serrated pattern. A serrated pattern is formed on a substrate forming a reflective portion to reflect a video on a screen, so the cooling surface area of the substrate is increased, thereby compensating for distortions in video scanned onto the screen.

Abstract: A projection type image display apparatus includes: a cabinet; a screen which is provided in the cabinet; a display device which is placed inside the cabinet and forms an image; and an optical system which projects an image formed by the display device to the screen and comprises at least one mirror, a supporter for supporting the mirror, and a frame through which the supporter is fastened to the cabinet, all of the mirror, the supporter and the frame being disposed within a single interior space formed by the cabinet and the screen.

Abstract: A liquid crystal display is provided. The liquid crystal display device comprises a light source unit, a light converting unit receiving light from the light source unit and converting a polarization property and a brightness distribution of the provided light, a screen receiving the light from the light converting unit and improving a frontal brightness of the provided light and a liquid crystal display panel disposed in front of the screen. Thus, the present invention provides a liquid crystal display having a good light efficiency without using an expensive optical film.

Abstract: A light tunnel and a projection apparatus having the same provide an improved degree of optical separation and an improved image forming efficiency. The light tunnel standardizes the intensity distribution of light emitted from a light source. The light tunnel comprises an incident plane and an emitting plane for the light. In addition, the size of the emitting plane is larger than that of the incident plane, and the emitting plane is inclined at a certain angle (?) relative to the incident plane. With this configuration, the degree of optical separation and image forming efficiency of an illumination light is improved. The improved degree of optical separation also improves the contrast ratio, while allowing a compact optical system.

Abstract: A projection lens system for an image projection apparatus that enhances the image aberration correction rate to achieve high resolution and luminance. The lens system includes a first lens group having first and second spherical lenses of positive refraction power movable along an optical axis, a second lens group having a third doublet lens formed with a lens of positive refraction power and a lens of negative refraction power in junction to correct chromatic aberration, and a fourth spherical lens to correct spherical aberration, a third lens group having lenses of positive refraction power, and a fourth lens group for correcting distortions having a seventh spherical lens being concave on both surfaces thereof, an eighth spherical lens of negative refraction power having a concave surface on one side and a convex surface on the other side, and a ninth lens of negative refraction power having an aspheric surface.

Abstract: An illumination optical system of a projection apparatus including a light source for emitting light, a light uniformity means shaped like a hexahedron, whose cross section becomes gradually larger from an input terminal to an output terminal and outputting uniform light through the output terminal when input with the light emitted from the light source through the input terminal, a light path changing means shaped like a plate and changing a path of the light output through the output terminal of the light uniformity means, and an image generator for receiving the light output through the light path changing means and generating an image. Thus, the present invention provides an illumination optical system of a projection apparatus for enhancing light uniformity and light segregation, and also providing easy fabrication and moderate cost.

Abstract: An illumination lens system and a projection system including the same are provided. The illumination lens system employed in the projection system condenses a beam emitted from a light source onto a display device that forms an image. The illumination lens system includes: first through third lens groups, the second lens group including a double lens having a first lens with a highly variable negative refractive power and a second lens having a low variable positive refractive power. The illumination lens system can reduce chromatic aberration without using an aspherical lens, thereby reducing manufacturing expenses.

Abstract: An image forming apparatus and a projection TV set having the same are provided. The image forming apparatus includes an illumination system and a projection system which enlarges and projects a color image from the illumination system onto a screen. The illumination system includes a light source; a color separator which separates light from the light source into separate colors; an integrator which shapes the light from the color separator; a display device which processes the incident light in response to an input signal and which forms a color image; a condensing element which directs the light from the light source to the display device and which transmits the light from the display device; and at least one light-path converter which bends the light from the light source upwards. The projection system is disposed at a different height in a vertical direction than the illumination system.

Abstract: Disclosed is an image projecting apparatus having two reflective mirrors. In an image projecting apparatus which forms a desired image on a digital micromirror panel (DMD) by projecting a ray of light from a light source thereonto, the surface parallel with the longer side of the movable mirror surface of the DMD panel and vertical to the movable mirror surface is parallel with the optical axis of the light source. The first reflective mirror reflects the ray of light from the light source at a predetermined angle, and the second reflective mirror is arranged to reflect the reflective light from the first reflective mirror to fall incident on the movable mirror surface of the DMD panel. The distance from the center of the DMD panel to the optical axis is minimized, and as a result, the overall height of the image projecting apparatus is reduced.

Abstract: Disclosed is an image projecting apparatus having two reflective mirrors. In an image projecting apparatus which forms a desired image on a digital micromirror panel (DMD) by projecting a ray of light from a light source thereonto, the surface parallel with the longer side of the movable mirror surface of the DMD panel and vertical to the movable mirror surface is parallel with the optical axis of the light source. The first reflective mirror reflects the ray of light from the light source at a predetermined angle, and the second reflective mirror is arranged to face the first reflective mirror and reflect the reflective light from the first reflective mirror to fall incident on the movable mirror surface of the DMD panel. The distance from the center of the DMD panel to the optical axis is minimized, and as a result, the overall height of the image projecting apparatus is reduced.

Abstract: Disclosed is an image projecting apparatus having two reflective mirrors. In an image projecting apparatus which forms a desired image on a digital micromirror panel (DMD) by projecting a ray of light from a light source thereonto, the surface parallel with the longer side of the movable mirror surface of the DMD panel and vertical to the movable mirror surface is parallel with the optical axis of the light source. The first reflective mirror reflects the ray of light from the light source at a predetermined angle, and the second reflective mirror is arranged to face the first reflective mirror and reflect the reflective light from the first reflective mirror to fall incident on the movable mirror surface of the DMD panel. The distance from the center of the DMD panel to the optical axis is minimized, and as a result, the overall height of the image projecting apparatus is reduced.

Abstract: A projection lens system for an image projection apparatus that enhances the image aberration correction rate to achieve high resolution and luminance. The lens system includes a first lens group having first and second spherical lenses of positive refraction power movable along an optical axis, a second lens group having a third doublet lens formed with a lens of positive refraction power and a lens of negative refraction power in junction to correct chromatic aberration, and a fourth spherical lens to correct spherical aberration, a third lens group having lenses of positive refraction power, and a fourth lens group for correcting distortions having a seventh spherical lens being concave on both surfaces thereof, an eighth spherical lens of negative refraction power having a concave surface on one side and a convex surface on the other side, and a ninth lens of negative refraction power having an aspheric surface.

Abstract: A reflection type projector having a structure so that aberration generated when sheet type PBS is adopted is corrected is provided. The reflection type projector includes a light source, a sheet type PBS arranged to be inclined with respect to an optical axis on a proceeding path of light emitted from the light source, a reflection type display device for generating an image from an incident light polarized in one direction passing the sheet type PBS and reflecting the generated image toward the sheet type PBS, a relay lens unit arranged on an optical path for guiding an incident light by focusing and/or diverging the incident light, a device for correcting aberration of an incident light, arranged on a proceeding path of the light generated from the reflection type display device and passing the sheet type PBS, and a projection lens unit for magnifying and projecting the light transmitting the correction device toward a screen.

Abstract: A color projector for correcting chromatism by changing the sizes or positions of three display devices with respect to each color is provided. In the color projector, two or more display devices selected from the first through third display devices have different sizes of effective areas where an image is formed such that chromatism generated while lights of different colors synthesized by the synthesizing device pass the projection lens unit can be corrected. Also, the distances between two or more display devices selected from the first through third display devices and the projection lens unit are different from one another such that chromatism generated while lights of different colors synthesized by the synthesizing device pass the projection lens unit can be corrected.