Abstract:
An illumination system includes an illumination unit having at least one light emitting device which emits a light beam of a predetermined wavelength and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device, and an optical path changer which changes a proceeding path of an incident light passing through the holographic optical element. A projector includes at least one illumination unit having at least one light emitting device which emits a light beam of a predetermined wavelength and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device, an optical path changer which changes a proceeding path of an incident light input through the holographic optical element, a display device which forms an image by processing a light beam input from the optical path changer according to an image signal, and a projection lens unit which magnifies the image formed by the display device and projects the magnified image toward a screen.
Abstract:
A high-resolution display displaying an image on a screen includes an illumination optical system, an image optical system, a pixel moving optical system, and a projection optical system. The illumination optical system includes a light source emitting a light. The image optical system includes an image forming device modulating an incident light to form the image. The pixel moving optical system includes a prism array deflecting the light from the image optical system to move pixels of the image to increase a number of pixels. The projection optical system includes a projection lens projecting the deflected light by the pixel moving optical system onto the screen.
Abstract:
An image display system includes an illumination system, a light valve, a polarization beam splitter, and at least one polarizing element. The illumination system includes a light source, a color separator, and a scrolling unit. The light valve processes color beams which are scrolled, according to an input image signal and form a color image. The polarization beam splitter transmits or reflects an incident light beam according to polarization so light from the illumination system advances toward the light valve and light from the light valve advances toward a projection lens unit. A polarizing element may be installed at a path of light traveling toward the polarization beam splitter or a path of light that is reflected by the light valve and travels toward the projection lens unit.
Abstract:
An illumination optical unit and an image display system including the illumination optical unit. The illumination optical unit comprises a light source which emits light and a dichroic mirror wheel, which includes a plurality of dichroic mirrors, each of which is divided into at least three segments, to sort out at least three color light beams from light incident from the light source and to reflect the light beams as the mirror wheel is rotated by a motor. The image display system comprises the illumination optical unit; an image optical unit which modulates light incident from the illumination optical unit to form an image; and a projection optical unit which projects light from the image optical unit onto a screen. Since light is temporally and spatially divided, light loss is reduced and a high resolution of an image is accomplished.
Abstract:
A projection system including a light source, a color separator, a scrolling unit, a light valve, a wire grid polarization beam splitter, and a projection lens unit is provided. The color separator separates an incident beam according to color. The scrolling unit scrolls the color beams. The light valve processes an incident beam according to an image signal and forms a color picture. The wire grid polarization beam splitter is disposed between the scrolling unit and the light valve and transmits or reflects an incident beam according to a polarization of the incident beam. The projection lens unit magnifies the color picture formed by the light valve and reflected by the wire grid beam splitter and projects the magnified color picture onto a screen.
Abstract:
A color lighting apparatus and method which has a small optical apparatus or method illuminating color beams with a high optical efficiency and an image projection apparatus and method using the same. The color lighting apparatus includes a light source, a color beam separating unit for separating incident light according to predetermined wavelength bands, a first condensing lens which condenses the light separated by the color beam separating unit, and a scrolling unit which changes the travel paths of beams separated according to the predetermined wavelength bands, forms color bars at different locations, and scrolls the incident light so as to periodically scroll the color bars. The image projection apparatus includes the color lighting apparatus, a second condensing lens which again focuses incident light, a uniform light forming unit which makes light passing through a scrolling unit into uniform light, an image forming device which forms an image from the light passing through the uniform light forming unit, and a projection lens unit which magnifies and projects the image produced form the image forming device onto a screen.
Abstract:
A highly efficient projection system, including a light source, a scrolling unit, a color separation hologram, a light valve, and a projection lens unit. The scrolling unit includes spirally arranged cylinder lens cells to scroll/cycle incident beams while rotating. The color separation hologram separates a beam radiated from the light source into beams with different wavelengths. The light valve forms a color image by turning on or off pixels according to an input image signal. The projection lens unit magnifies the image formed by the light valve and projects the magnified image toward a screen. In this projection system three color beams from the light source are scrolled simultaneously to produce a picture, resulting in a highly light efficient projection system.
Abstract:
An illumination system which realizes a color image without a color wheel and a projector adopting the illumination system. The illumination system comprises at least one light emitting device which emits a light beam having a predetermined wavelength and a holographic optical element which reduces a cross section of the light beam. The projector includes the illumination system, a display device which forms an image by processing light from the illumination system according to an input image signal, and a projection lens which magnifies and projects the image onto a screen. The light emitting device may be constructed in an array form and the arrays may be arranged inline and adjacent to an optical path changer or distributed around an optical path changer at predetermined angles. The arrays and holographic optical elements may be provided in layers in order to reduce a size of the illumination system.