Abstract: A three-panel projection display apparatus displays a color image by separating light emitted from a light source into lights of three primaries, i.e., red, green, and blue, with dichroic mirrors, by irradiating liquid crystal light valves with the respective separated lights, by combining the lights modulated by the respective liquid crystal light valves with a cross dichroic prism, and by projecting the combined light through a single projection lens onto a screen. The lengths of the light paths for the separated blue and green lights are equal to each other. The distance between a condenser lens and the liquid crystal light valve in the blue light path is shorter than the distance between a condenser lens and the liquid crystal light valve in the green light path.

Abstract: A projection device is provided. In one embodiment, the projection device may include an optical system mounted within the projection device and having an optical system axis substantially parallel to the optical system. The projection device further may include a combination control operatively coupled to the optical system and having a control axis that is non-parallel to the optical system axis.

Abstract: An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.

Abstract: A projection-type display device 100 including a light source 10, a luminance modulation light valve having a plurality of pixels capable of independently controlling a transmission factor T1, dichroic mirrors 44a and 44b that divided the light from the luminance modulation light valve into the three primary colors of red, green and blue, a plurality of color modulation light valves into which light divided with dichroic mirrors 44a and 44b respectively enters and have a plurality of pixels capable of independently controlling a transmission factor T2, and a dichroic prism 48 that synthesizes light from each of the color modulation light valves, and is provided with a relay optical system 16 on the light path of a luminance modulation section 14 and a color modulation section 18 that forms an optical image of the luminance modulation light valve on the pixel surfaces of each of the color modulation light valves.

Abstract: A light recovery system for a projection display with a reflector having a first and a second focal points. A source of electro-magnetic radiation is disposed proximate to the first focal point of the reflector to emit rays of radiation that reflect from the reflector and converge substantially at the second focal point. A retro-reflector reflects at least a portion of the electromagnetic radiation that does not impinge directly on the reflector toward the reflector through the first focal point of the reflector to increase the flux intensity of the converging rays. A light pipe wit an input surface and an output surface is disposed with the input surface proximate to the second focal point to collect and transmit substantially all of the radiation. A PBS is disposed proximate to the output surface to collect and polarize substantially all of the radiation into a radiation of a first polarization and a second polarization.

Abstract: The image display device is configured to include the light source including a plurality of semiconductor light-emitting elements, a parallelizing unit including a plurality of cell lenses arranged in a one-to-one correspondence with each of the plurality of semiconductor light-emitting elements, an image display element for forming an optical image, a pair of lens-array groups located between the parallelizing unit and the image display element, and a projection unit for enlarging and projecting the optical image formed on the image display element. Moreover, the plurality of semiconductor light-emitting elements are located at substantially focal points of the cell lenses of the parallelizing unit.

Abstract: An illumination optical system is disclosed, which provides a luminous flux with a small incident angle on an illumination surface in one axis direction on a section of the luminous flux. The illumination optical system can suppress a reduction in light amount by a mask provided for a polarization conversion element. The illumination optical system has a light source and an optical integrator. The optical integrator uses a lens array to perform splitting of a luminous flux from the light source. The illumination optical system has the polarization conversion element including a polarization beam splitter array, a plurality of ½ wave plates, and a mask. The light source is a discharge gas exciting arc tube of a DC drive type.

Abstract: Aspects of the invention can provide a projector capable of projecting a high-quality image by illumination that does not produce a difference in size among illumination areas for respective colors including red, green, and blue. A light-source light from a light source can be separated into color lights by first and second dichroic mirrors provided in a color separation system, which independently go incident on corresponding liquid crystal light valves as illumination lights. Herein, a mutual chromatic aberration can be corrected by adjusting, as needed, the radii of curvature of respective field lenses provided in the color separation system for use in adjusting angles of incidence of illumination lights with respect to the liquid crystal light valves. This configuration makes it possible to illuminate the respective liquid crystal light valves by illumination areas of exactly the same size, which in turn enables a high-quality image having no display shadow to be projected.

Abstract: Illumination systems are disclosed, which include illumination channels of different colors and at least one image-forming device. Each illumination channel, in turn, includes a bank of light sources, and the image-forming device is disposed to receive illumination from at least one of the illumination channels. At least one of the illumination channels includes an optical element, such as an optical element having optical power or a homogenizing optical element, that is not shared with any other illumination channel and is preferentially constructed or preferentially positioned for the color of its illumination channel.

Abstract: An object of the invention is to achieve a high intensity, a compact structure, a cost reduction and a heat radiation of a liquid crystal panel, in a projection type video display apparatus employing a combination of LED light sources and a light pipe. The light pipe is formed in a hollow type so as to be utilized as a cooling wind path. Further, a permeable or reflective baffle plate is provided within the light pipe. Further, the light pipe is formed by coating a mirror on an inner surface of an optical case integrally formed by fixing optical parts. Further, a dichroic mirror is arranged in an LED light source outgoing surface.

Abstract: Exemplary embodiments of the present invention provide a lighting unit including a lamp device adjusted by a general-purpose measuring device at high working efficiency, and yet allowing efficient utilization of light from a light source. In a light source device, since a first fly's eye has a concave entrance surface having a predetermined curvature, luminous flux entering the first fly's eye optical system and passing through the entrance surface is collimated to be parallel with an optical axis. Accordingly, illumination lights entering respective liquid crystal light valves are precisely superposed while allowing the angles of incidence of respective partial luminous fluxes entering the respective liquid crystal light valves to fall within a predetermined angle range, thereby enhancing utilization efficiency of the illumination lights.

Abstract: An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.

Abstract: Exemplary embodiments provide a projector having a structure capable of easy miniaturization and capable of achieving a smooth moving picture display of good quality. A projector including: an illuminating apparatus; a color separating optical system; liquid crystal display devices; and a projecting optical system, the projector further including: a shielding member provided in the vicinity of a light emitting surface of a first lens array and in which a light transmitting area and a light non-transmitting area are alternately arranged in an optical path in a first direction vertical to an optical axis of illumination; and a rotating prism, which is provided between a superimposing lens and the color separating optical system, for scanning an illuminating light bundle in image forming areas of the liquid crystal display devices synchronously with screen writing frequencies of the liquid crystal display devices.

Abstract: According to the present invention, there is provided an image display device including a non-luminous reflection type spatial light modulating element, illuminating system to illuminate the reflection type spatial light modulating element and a projection lens and in which light from a light source (2) illuminates the reflection type spatial light modulating elements (14, 15) via first and second fly-eye integrators (9, 10). An unnecessary part, not modulated, of the light reflected by the reflection spatial light modulating elements (14, 15) and further by a reflector (4) for recycling. Since the fly-eye integrators (9, 10) are displaced in relation to their optical axes, it is possible to utilize the light with an improved efficiency and prevent any nonuniform illumination from taking place.

Abstract: In a projection type image display apparatus, a projector optical unit for projecting an image onto a screen while magnifying a size of the image to be projected with respect to an original size of the image displayed by an image forming element, has a group of lenses for magnifying the size of the image with respect to the original size thereof, and an optical path extending from the image forming element to the screen to transmit the image along the optical path.

Abstract: A display device using a tilt-mirror device and a projector. The image display device may include a first color-ray light-source for supplying a G-ray, a second color-ray light-source for supplying a R-ray or B-ray, and a tilt-mirror device having a plurality of movable mirror elements that may be switched between a first reflection position and a second reflection position. The first color-ray light-source may be arranged so that the G-ray is reflected in a predetermined direction when the movable mirror elements are located in the first reflection position, and the second color-ray light-source can be arranged so that the R-ray or B-ray is reflected in a predetermined direction when the movable mirror elements are located in the second reflection position. The color-ray light-sources may be conjugated with an entrance pupil of the projection lens of the projector.

Abstract: A projection display device for enlarging and projecting an image includes a first lens group on the enlarging end of the projection display device, a plurality of display elements, each modulating a different one of a plurality of light beams with image information, an optical combiner for receiving from different directions different light beams modulated by different display elements, combining the modulated light beams, and directing the combined modulated light beams along an optical axis to the first lens group, and a plurality of second lens groups, each arranged on a separate optical axis so that a different one of the modulated light beams modulated by a different display element on the separate optical axis passes through one of the second lens groups before being incident on the optical combiner. The projection optical device satisfies certain conditions related to focal lengths and size of the display elements.

Abstract: A projection system comprising an illumination relay, a coupling lens, a modulation device, and a projection lens is provided. The illumination relay is configured to provide an illumination beam to the coupling lens along an illumination path having a first optical axis. The coupling lens is configured to direct the illumination beam onto the modulation device. The modulation device is configured to modulate the illumination beam to form an imaging beam and reflect the imaging beam into the coupling lens. The coupling lens is configured to direct the imaging beam into the projection lens along a projection path having a first optical axis such that the second optical axis is substantially parallel with the first optical axis.

Abstract: A projector including an illumination device, an electra-optic modulator and a projection optical system. The illumination device is provided with a light source that emits a substantially parallel luminous flux to the side of a region to be illuminated; a first lens array including a plurality of first small lenses; a second lens array including a plurality of second small lenses corresponding to the first lens array; and a superimposing lens that superimposes the partial luminous fluxes coming from the second lens array. The projector further including a light shielding member provided with a stray light elimination member disposed to be substantially optically conjugate with the plurality of first small lenses and the electro-optic modulator for adjusting the cross-section shape of the luminous flux; and a rotating prism for scanning the luminous flux from the light shelding member in synchronization with a frame rate of the electro-optic modulator.

Abstract: A projection type display apparatus is composed of a light source (101), an illumination optical system (102) for forming illumination light, a reflection type light valve (106) for reflecting the illumination light to form an optical image, a projection optical system (107) for projecting the optical image, and a lens (105) with a positive power. An optical axis (115) of the reflection type light valve, an optical axis (113) of the projection optical system, and an optical axis (114) of the lens with a positive power are matched with each other. The illumination optical system (102) is placed so that the illumination light passes through the lens (105) with a positive power and is reflected from the reflection type light valve (106). An output pupil (108) of the illumination optical system (102) and an entrance pupil (109) of the projection optical system (107) are placed so as to have a conjugate relationship with respect to the lens (105) with a positive power.

Abstract: An apparatus including a spatially modulated extended light source configured to project an output having at least one region of diminished illumination, and an array of polarizing beam splitters (PBSs) positioned proximal to the spatially modulated extended light source. The light source includes at least two light outputs configured to project unpolarized light; and at least one gap interspersed between the light outputs. The array of PBSs is configured to receive the output from the light source, convert the unpolarized light to light having a first polarized state, and remove the at least one region of diminished illumination.

Abstract: A lighting optical unit having an optical system for irradiating light from a light-source lamp on a predetermined object in a uniform and/or convergent manner includes a reflector for reflecting light from the light-source lamp to provide converged light and an optical assembly for collimating this converged light to provide a bundle of approximately parallel rays, wherein the bundle of approximately parallel rays is made to enter the optical systeml. Thus, in a liquid-crystal projector using a transmission type liquid-crystal panel with micro-lens, while a demand for increasing a quantity of light incident on an effective area of pixel of a liquid-crystal panel is being satisfied, the lighting optical unit can be made compact in size.

Abstract: A projection apparatus has an illumination section that provides first, second, and third light sources for providing first, second, and third illumination beams. First, second, and third component wavelength modulating sections modulate the corresponding illumination to provide first, second, or third modulated component wavelength beams respectively. Each component wavelength modulating section uses a portion of a monochrome transmissive liquid crystal modulator panel that has been segmented into at least a first, second, and third portion. A component wavelength polarizer in the path of the component wavelength illumination directs substantially polarized light to the corresponding portion of the monochrome transmissive liquid crystal modulator panel. An illumination path Fresnel lens focuses incident illumination from the component wavelength polarizer through the corresponding portion of the monochrome transmissive liquid crystal modulator panel.

Abstract: A projector capable of obtaining a smooth motion picture display of high quality without significantly reducing the utilization efficiency of light includes a light source device, a first lens array, a second lens array, a superimposing lens, a liquid crystal display device, and a projective optical system. The superimposing lens includes an anamorphic optical system to shape illumination luminous fluxes from the second lens array into illumination luminous fluxes having a cross-sectional shape that illuminates all the image formation regions of the liquid crystal display device in one direction along an X-axis direction, and a part of the image formation regions in the other direction along a Y-axis direction. The projector further includes a scanning device to scan the illumination luminous fluxes shaped by the superimposing lens in synchronism with a field frequency of the liquid crystal display device along the other direction on the image formation region.

Abstract: An illumination apparatus comprises a small-plane light source having diffusion radiation characteristics, a columnar light leading member, having an incident end surface, an outgoing radiation end surface and a reflection surface, configured to reflect on the reflection surface at least a part of a light ray from the small-plane light source collected from the incident end surface, thereby leading the light to the outgoing radiation end surface, and an angle position converting member configured to convert an outgoing light angle intensity of the outgoing light from the outgoing radiation end surface of the columnar light leading member into a position intensity in a predetermined irradiation area.

Abstract: In a projection display device that is provided with a relay lens for converting flux that is emitted from a light source to a parallel flux for illuminating an image display element (DMD), and a total internal reflection prism for both directing flux that is emitted from the relay lens to the DMD and directing flux that is reflected by the DMD toward a projection lens, the relay lens is unified with the prism as a lens-integral prism by bonding the relay lens to the total internal reflection surface of the prism.

Abstract: An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.

Abstract: A lamp has a deformed lamp reflector and a lamp front glass. The deformed lamp reflector is made by deforming an ellipsoid of revolution of a conventional lamp reflector into an aspherical reflection surface rotationally symmetrical with respect to an optical axis. The lamp front glass is obtained by deforming at least one of an incident surface and outgoing surface of a conventional lamp front glass into an aspherical lens surface rotationally symmetrical with respect to the optical axis. A light flux emitted from the center point of an illuminant is reflected by the deformed lamp reflector, and output with a uniform density through all of the outgoing surface of the lamp front lens so that the light flux is condensed at focus point.

Abstract: An illumination unit for a projection image display. The illumination unit includes a light source, an integrator which converts light emitted from the light source to have uniform optical intensity, and an aspect ratio conversion unit which transmits light emitted from the integrator that does not correspond to an aspect ratio of image information back to the integrator, and converts and emits incident light to correspond to the aspect ratio of the image information.

Abstract: A projector includes: an illumination device including a light source that emits a parallel illuminating light beam, lens integrators each having a first lens array to split the illuminating light beam into a plurality of secondary light beams, a second lens array, and a superimposing lens that superimposes the secondary light beams; an electro-optic modulating device that modulates the illuminating light beam; a projection optical system that projects the modulated illuminating light beam; a mode-selecting device that selects a normal mode in which an image-forming region is illuminated in lengthwise or crosswise directions, and a persistence-of-vision-relaxed mode in which the image-forming region is illuminated in lengthwise or crosswise directions and partially illuminated in the other direction; and a scanning system to scan the image-forming region of the electro-optic modulating device along the other direction in synchronization with a frame rate of the electro-optic modulating device when in a persis

Abstract: A collimator is compact and uses power efficient light emitting diodes as the illumination source to generate a test image in collimated space. The collimator provides a test image across a wide field of view, which is useful for calibration of optical devices that have a wide field of regard. An optical projection system in the collimator utilizes an array of light emitting diodes, whose light is converged by a Fresnel lens, through a holographic diffuser plate, onto a target plate bearing the test pattern to be projected out into collimated space through a converging lens. An alignment structure provides translation of the target plate along the main axis of the collimator and provides rotational freedom about two axes (vertical and horizontal) via a gimbal structure mounted on the translation mechanism.

Abstract: A projector having a cross-dichroic prism (260) synthesizing three kinds of red, green, and blue light emitted from liquid crystal panels (250, 252, 254); and a projection lens (270) projecting the synthesized light and also having polarizing plates (251, 253, 255) disposed on the optical paths between the corresponding liquid crystal panels (250, 252, 254) and the cross-dichroic prism (260) includes a lens element (256), serving as an optical element for compensating chromatic aberration of magnification, which is formed on and integrally with one surface of the polarizing plate (251) disposed on the light path of the red light and which adjusts the size of the projected image screen of the red light extending along at least a predetermined direction so as to be nearly equal to those of the projected image screens of the other kinds of color light extending along the predetermined direction.

Abstract: Projector bulb life is managed to achieve desired performance parameters, such as a maximum life mode or maximum brightness mode, by sensing bulb luminance and applied the sensed luminance with a luminance feedback controller to drive the bulb to achieve the desired performance parameter. For instance, in maximum life mode the luminance feedback controller reduces power applied to the bulb to restrict bulb luminance to a maximum luminance setpoint when greater luminance is available with a newer bulb. In maximum brightness mode, the luminance feedback controller increases power applied to the bulb to increase bulb luminance if the sensor senses luminance below a threshold due bulb wear. Bulb life management improves project image illumination to display information in a variety of projector types, including digital mirror devices and liquid crystal displays.

Abstract: A projector illumination system includes a tunnel integrator incorporated with a field lens at its output end. One advantage of using the field lens is to form an image of the entrance end of the tunnel integrator at the secondary stop of the illumination system when combined with other relay and/or imager field lenses in the illumination system. This reduces vignetting, resulting in an increased uniformity of illumination, and increased light throughput.

Abstract: A LCoS projection display system using two LCoS chips and software or firmware to control the chips so that any defects in the first chip that result in incorrectly displayed pixels are corrected by production of compensating illumination provided by the second LCoS chip.

Abstract: A lighting includes: a light source device; a concave lens having a light-incident surface formed from a hyperboloid of revolution to make the luminous flux from the light source device almost parallel; a first lens array; and a second lens array, with a concave surface is present between the light-incident surface of the concave lens and the first lens array, and the concave surface causes, together with the light-incident surface of the concave lens, the luminous flux to travel along an optical path heading to an outer side rather than an optical path parallel to an optical axis of the light source device, while causing the luminous flux to pass through the small lenses that correspond to each other in the first lens array and the second lens array.

Abstract: A method of generating a projection beam for projecting an image includes collimating the projection beam and filtering infra-red or ultraviolet radiation from the projection beam after the projection beam has been collimated.

Abstract: The present invention provides a small projection type display apparatus capable of suppressing an optical path of incident light and an optical path of output light in a reflection type light valve from being overlapped with each other and obtaining a projected image of high quality; a rear projector and a multi-vision system using the same. The projection type display apparatus is composed of an illumination optical system 2 for collecting light radiated from a light source 1 to form illumination light, a reflection type light valve 6 for reflecting the illumination light to output modulated light forming an optical image, a projection lens system 7 for projecting an optical image formed by the reflection type light valve, and a lens element 5 with a positive power.

Abstract: An illumination system is provided with at least a first reflecting device that has a first focal point at the arc of an arc lamp. The second focal point of the reflecting device is located at the input end of a compound parabolic concentrator (CPC). The CPC is optically coupled with an optical integrator. Light exiting the optical integrator may be used in low étendue projection systems.

Abstract: An illumination optical system which can use light from a light source with high efficiency and can provide an illumination luminous flux with highly uniform illuminance, is disclosed. The illumination optical system illuminates an illumination surface with a generally telecentric illumination luminous flux. In light intensity distribution of illumination light on the illumination surface changing depending on a deviation angle of an incident ray with respect to a normal to the illumination surface, the illumination optical system operates the illumination luminous flux such that a ratio of angle widths at which light intensity reaches half of a peak value in each of two axis directions orthogonal to each other on the illumination surface is an aspect ratio of 2:1.

Abstract: An image projecting device is presented. The device comprises an SLM pixel arrangement; and two lens arrays. The lens arrays are respectively located at opposite surfaces of the SLM pixel arrangement and are integral with the SLM pixel arrangement, forming together with the SLM pixel arrangement a common SLM unit. Each lens in one array and a respective opposite lens in the other array are associated with a corresponding one of the pixels. Each of the lens arrays is implemented in a polymer spacer and is either spaced from the corresponding surface of the opposite surfaces of the pixel arrangement a distance substantially not exceeding 50 ?m or is in physical contact with the respective surface. The device also comprises a light source system operable to produce an incident light beam of a predetermined cross section corresponding to the size of an active surface of the SLM pixel arrangement; and a magnification optics.

Abstract: The present invention provides a technique for readily changing the design of a projector. A projector comprises: an illumination optical system; a light modulation device; a projection optical system; and a base frame for mounting a plurality of optical components disposed on a light path from the optical illumination system to the projection optical system. The illumination optical system 300 comprises: a light source 20; a lens array 320; and a superimposing lens system 370. The base frame includes a positioning section for positioning the superimposing lens system 370. The superimposing lens system 370 includes at least two lenses 371 and 372. The first lens 371 is provided at a position nearest to the light source and mainly determines an F-number of the illumination optical system. The second lens 372 is provided at a position furthest from the light source and mainly determines a magnification of the illumination optical system.

Abstract: An illumination optical system which can use light from a light source with high efficiency and can provide an illumination luminous flux with highly uniform illuminance, is disclosed. The illumination optical system illuminates an illumination surface with a generally telecentric illumination luminous flux. In light intensity distribution of illumination light on the illumination surface changing depending on a deviation angle of an incident ray with respect to a normal to the illumination surface, the illumination optical system operates the illumination luminous flux such that a ratio of angle widths at which light intensity reaches half of a peak value in each of two axis directions orthogonal to each other on the illumination surface is an aspect ratio of 2:1.

Abstract: The invention provides a projector having a light source, a display device to modulate light emitted from the light source, a lens device to project light emitted from the light source via the display device, wherein the lens device has a diaphragm mechanism formed having an aperture, an ambient light illuminance detector to measure illuminance of ambient light, a projected image illuminance detector to measure illuminance of an image projected on the screen, an illuminance comparator to compare an illuminance detected by the ambient light illuminance detector and an illuminance detected by the projected image illuminance detector, and a diaphragm mechanism/image signal controller to control an intensity of image signals input into the display device and to control a size of an opening of the aperture of the diaphragm mechanism in accordance with a result of comparison by the illuminance comparator.

Abstract: To provide a projection type video display capable of reliably preventing a double image from being produced. A first light flux producer for producing a first light flux and a second light flux producer for producing a second light flux are arranged on the light emission side of a lamp. The light flux producer comprises a condenser lens, a rod integrator, and a pair of lenses. Lights passing through the pair of lenses are respectively refracted by condenser lenses, and are respectively introduced into first and second areas of a liquid crystal display panel in such a manner as to cross an optical surface in a color separating and mixing sector.

Abstract: The invention provides a projector having a light source, a display device to modulate light emitted from the light source, a lens device to project light emitted from the light source and modulated by the display device, wherein the lens device comprises a diaphragm mechanism, an image signal intensity detector to detect image signals input into the display device and to evaluate an intensity of the signals, a diaphragm mechanism drive control to drive the diaphragm mechanism so as to reduce the size of an aperture of the diaphragm mechanism when the image signal intensity detector ascertains that the intensity of the image signal is lower than a given level, and an image signal controller to increase the intensity of the image signal when the image signal intensity detector ascertains that the intensity of the image signal is lower than a given level.

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: To provide an image display device and a projector having a brightness or an excellent utilization efficiency of the light by improving the display performance of a moving picture.

Abstract: A scrolling unit for forming a color image through scrolling, and a color illuminating system and a projection system using the scrolling unit. The scrolling unit includes a first spiral lens disk, a second spiral lens disk, and a glass rod. The first spiral lens disk includes a plurality of cylindrical lens cells arranged in a spiral pattern and can be rotated. The second spiral lens disk is installed facing the first spiral lens disk and can be rotated at the same speed as the first spiral lens disk. The projection system includes a light source, an optical splitter for splitting light into light beams having different colors, and a scrolling unit that scrolls the light beams by periodically changing paths on which the light beams proceed. Also included is a light valve for forming an image, and a projection lens unit for enlarging and projecting the image.

Abstract: Multi-directional optical elements are disclosed that include a body having a first side having a first curvature, a second side having a second curvature, a third side having a third curvature, and a fourth side having a fourth curvature. The second side is disposed generally opposite the first side along a first direction and a fourth side is disposed generally opposite the third side along a second direction, the second direction being different from the first direction. Also disclosed are optical systems utilizing such multi-directional optical elements.