Abstract: A projection system including a light source, a polarization conversion system, a reflection mirror, a color separator, a scrolling unit, a light valve, and a projection lens unit is provided. The polarization conversion system includes an incidence plane through which light emitted from the light source enters, and transmits a beam with a first polarization from the light entering through the incidence plane and reflects a beam with a second polarization toward the incidence plane and then changes the polarization of the reflected beam. The reflection mirror reflects the light emitted from the polarization conversion system through the incidence plane back toward the incidence plane. 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 projection lens unit magnifies and projects the color picture onto a screen.

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 highly-efficient projection system is provided, including a light source, a color separator, a scrolling unit, a light valve, and a projection lens unit. The color separator separates an incident beam according to color. The scrolling unit includes at least one lens cell and converts the rotation of the lens cell into a rectilinear motion of an area of the lens cell through which light passes so that an incident beam is scrolled. The light valve includes a plurality of micromirrors independently driven according to image signals to change a reflection angle of incident light. The light valve processes a beam transmitted by the color separator and the scrolling unit according to an image signal and forms a color picture. The projection lens unit magnifies the color picture formed by the light valve and projects the magnified color picture onto a screen.

Abstract: A projection system and method are provided. The projection system includes a light source, at least one filter having a slit, a scrolling unit, a color separator, and a light valve. The slit in the at least one filter controls a divergence angle of light emitted from the light source. The scrolling unit scrolls an incident beam. The color separator has a plurality of dichroic filters which separate an incident beam emitted from the light source according to color. The light valve receives a plurality of color beams from the color separator and transmitted by the scrolling unit on corresponding color areas and forms a plurality of color bars by scrolling the color beams. A black bar is formed between adjacent color bars by controlling a distance between adjacent dichroic filters or by controlling the width of the slit in the at least one filter.

Abstract: A projection system including an adjusting part, a scrolling part, and a color separating part is provided. The adjusting part adjusts the divergence angle of light emitted from a light source. The scrolling part scrolls a plurality of color bars on a light valve. The color separating part separates an incident beam, emitted from the light source and transmitted by the scrolling part, into a plurality of color beams. The adjusting part, the scrolling part, and the color separating part are sequentially arranged from the light source. Since beams of individual colors travel along a single path, the number of required optical components is reduced, thereby making the projection system compact.

Abstract: A color scrolling projection system is provided, including a light source, a color separator, a color scanner, a light valve, and a control circuit. The light source generates and emits light. The color separator separates incident light according to color. The color scanner includes a scrolling unit and a driving source for rotating the scrolling unit. The scrolling unit includes at least one lens cell and converts the rotation of the scrolling unit into the rectilinear motion of a lens array of the scrolling unit through which light passes. The light valve processes color bars according to an input image signal and forms a color image. The control circuit synchronizes the scrolling of the color with the electrical scanning of the light valve according to an image signal. The color bars are scrolled on the light valve due to a rotation of the scrolling unit.

Abstract: An illumination system includes a light source, first and second cylindrical lens arrays, and a relay lens. The first cylindrical lens array includes a plurality of cylindrical lens cells which divide light emitted from the light source into a plurality of beams. The second cylindrical lens array includes a plurality of cylindrical lens cells which combine the beams divided by the cylindrical lens cells in an identical direction. The relay lens relays beams passed through the second cylindrical lens array so that most of the beams are concentrated on an incident light axis to have a Gaussian distribution. Accordingly, light passed through slits for controlling the divergence angle of incident light or the etendue of an optical system has a Gaussian distribution in a color separation direction or a color scrolling direction. Thus, light efficiency is improved.

Abstract: A high-efficiency, compact color illuminating system and a projection type image display apparatus using the color illuminating system are provided. The color illuminating system includes a light source, a spiral lens disc that periodically scrolls light by rotational movement, and an optical unit that isolates light beams of different wavelengths from white light emitted from the light source and guides the isolated light beams to enter at least two effective regions of the spiral lens disc. The projection type image display apparatus includes the color illuminating system, an image forming unit that generates images using scrolling light from the spiral lens disc, and a projection lens unit that enlarges and projects the images formed by the image forming unit on a screen.

Abstract: A projection system that can adjust color balance of incident light is provided. The projection system includes a light source, a spatial filter, an optical separator, a scrolling unit, a light valve, and a projecting lens unit. The spatial filter has a slit to adjust a divergent angle or etendue of light emitted from the light source. The optical separator separates light passing through the spatial filter according to color of incident light. The scrolling unit has one or more spiral lens discs, which are formed by spirally arranging cylindrical lens cells, rotate, and scroll color beams separated by the optical separator. The light valve processes light passing through the scrolling unit according to an image signal and forms an image. The projecting lens unit magnifies the image formed on the light valve and projects the magnified image onto a screen.

Abstract: A single-panel color image display apparatus realizing a wide color gamut is provided. The single-panel color image display apparatus includes a colored light separator having a plurality of dichroic filters in which a dichroic filter reflecting a red light beam may be disposed lastly among the plurality of dichroic filters. The single-panel color image display apparatus may include a scrolling unit having a mask at a boundary portion between spiral lens cells.

Abstract: A highly efficient projection system is provided, including a light source, a color separator, a scrolling unit, a light valve, a projection lens unit, and a polarization conversion system. The color separator separates an incident beam according to color. The scrolling unit includes at least one lens cell and converts a rotation of the lens cell into a rectilinear motion of an area of the lens cell through which light passes so the incident beam is scrolled. The light valve processes a beam transmitted by the color separator and the scrolling unit, according to an image signal and forms a color picture. The projection lens unit magnifies the color picture formed by the light valve and projects the magnified color picture onto a screen. The polarization conversion system is installed between the color separator and the light valve and converts the incident beam into a beam with a single polarization.

Abstract: A cantilever having a step-up structure and a method of manufacturing the same. The cantilever includes a substrate, an anchor formed on the substrate, and a moving plate connected to the anchor while maintaining a predetermined gap from the substrate. The anchor includes a first anchor of a predetermined shape and a second anchor perpendicular to an edge of the first anchor while being formed along a longitudinal axis of the moving plate. Accordingly, a deformation of the cantilever caused by the high temperature and pressure in a manufacturing process thereof is considerably reduced. As a result, the yield rate of the cantilever is improved, and the reliability of a product using the cantilever is also improved.

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: A projection system including a lighting system, a screen, a color filter separating light emitted from the lighting system according to wavelengths of the light, a first reflecting mirror reflecting the light passing through the color filter to change a path of the light, a display device provided in a predetermined position in the first reflecting mirror, a second reflecting mirror reflecting light reflected from the first reflecting mirror toward the display device, and a projection lens unit enlarging and projecting a color image formed by the display device onto the screen.

Abstract: A single-panel color image display apparatus realizing a wide color gamut is provided. The single-panel color image display apparatus includes a colored light separator having a plurality of dichroic filters in which a dichroic filter reflecting a red light beam may be disposed lastly among the plurality of dichroic filters. The single-panel color image display apparatus may include a scrolling unit having a mask at a boundary portion between spiral lens cells.

Abstract: A cylindrical lens array for achieving color scrolling, a projection system using the cylindrical lens array, and a scrolling method. The cylindrical lens array is formed by arranging lens cells in an endless track. When the cylindrical lens array rotates, light rays passing through the lens cells advance along different paths. The projection system includes a light source, the cylindrical lens array, a light splitter, a light valve, and a projection unit. The light source emits a light. The cylindrical lens array has a plurality of lens cells arranged in an endless track and scrolls color bar images upon rotation. The light splitter splits incident light emitted from the light source into color beams according to a wavelength. The light valve receives the color beams split by the light splitter and scrolled by the cylindrical lens array and forms a color image by turning pixels on or off according to an input image signal.

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.

Abstract: An apparatus for finely adjusting an orientation of an optical device. The apparatus includes a base plate which supports an optical device, a bracket coupled to the base plate such that the base plate is rotatable with respect to the bracket, a spring disposed between the base plate and the bracket to apply an elastic force to the base plate, and an adjusting element which pushes the base plate against the bracket through the base plate to adjust a relative position of the optical device with respect to the bracket. The apparatus can finely and precisely adjust the orientation of the optical device.

Abstract: A projection system including a light source, a rectilinearly reciprocating cylindrical lens array, an optical separator, a light valve, and a projection lens unit. The light source emits a beam. The rectilinearly reciprocating cylindrical lens array advances color beams along different paths upon reciprocation. The optical separator separates the beam emitted from the light source into color beams according to wavelength. The light valve receives the scrolled color beams transmitted by the cylindrical lens array and forms a color image by pixels turning on or off according to an input image signal. The projection lens unit magnifies the color image formed on the light valve and projects the magnified color image on 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.