Abstract: Laser display system having at least more than two lasers, and a display panel for receiving an electrical picture signal, and regulating a quantity of light from the laser to form an image based on the electrical picture signal, including a light superimposer of optical fibers for superimposing the lights from the lasers, thereby improving an optical efficiency to provide a bright and clear picture.

Abstract: A light source arrangement has a first light source, a second light source and a dichroic mirror. The dichroic mirror is disposed with the first and second light sources and configured to reflect a predetermined portion of the light emitted from the first light source and to transmit the remaining portion. The dichroic mirror is also configured to reflect light emitted from the second light source so that it propagates in the same direction as the remaining portion of the light from the first light source which is transmitted through the dichroic mirror.

Abstract: A filter device including a red filter unit, a green filter unit, a blue filter unit and at least one of a yellow filter unit, a cyan filter unit and a magenta filter unit is provided. Red light, green light and blue light are produced when white light passes through the red filter unit, the green filter unit and the blue filter unit. In the CIE1931 color space coordinate, a triangle color space is formed through joining the points representing the red, green and blue light. Moreover, yellow light, magenta light and cyan light are produced when white light passes through the yellow filter unit, the magenta filter unit and the cyan filter unit. In the CIE1931 color space coordinate, the minimum distance from the points representing the yellow, magenta and cyan light to the edge of the triangle is not exceeding in 0.03.

Abstract: A projection device having single light valve has a light source, a projection lens, an imaging unit and a beam breaker. Moreover, the imaging unit has a color production device and a valve. When the beam provided by light source propagates to the color production device, the color production device converts the beam into several different color beams in an order. Thereafter, the beams propagate to the beam breaker, and the beam breaker breaks the beam propagating through within a definite time according to the states of imaging unit. Afterwards, the beams that are not broken are converted into images by the light valve in order, and projected on a screen by projection lens. The beam breaker module can enable the projection device having single light to have several situation modes, and maintain the imaging contrast.

Abstract: A light-filtering element for a display device is provided. The element includes at least one filter having a chamber with a filtering fluid, the filtering fluid selectively disposed in an optical path, and a liquid motion actuator selectively configured to move the filtering fluid substantially into and out of the optical path.

Abstract: A reflective color wheel is adapted to receive composite source light provided by a light source, and includes a plurality of multi-layer light-reflecting sections for splitting the composite source light into a plurality of colored light beam components. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along an axis. Each of the light-filtering layers of each of the multi-layer light-reflecting sections is capable of reflecting light within a predefined distinct wavelength range, and permits transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.

Abstract: Embodiments of the invention restrain temperature rise in a light exiting-side polarizer included in a liquid crystal light valve without limiting the quantity of light incident on the liquid crystal light valve and a projector that has a liquid crystal light valve to modulate incident light in accordance with a provided image signal and that projects an image represented by modulated light exiting from the liquid crystal light valve. The projector has a black level adjusting unit to adjust black level of the image signal, a temperature-detecting unit to detect temperature of the light exiting-side polarizer, and a control unit to control operation of the black level-adjusting unit. The control unit is characterized by causing the black level-adjusting unit to adjust the black level of the image signal on the basis of the temperature detected by the temperature-detecting unit in order to restrain temperature rise in the light exiting-side polarizer.

Abstract: Provided are several apparatus and methods to attenuate illumination light in a projector. Illumination light may be attenuated by directing polarized light toward a liquid crystal (LC) attenuation panel. The panel selectively modulates some, all, or none of the polarized light passing through. The light from the panel is then directed toward a polarization device. The polarization device analyzes the polarized light, and allows or denies the light to pass therethrough based on the polarization of the light.

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: The present invention provides a projection image display technology capable of correcting astigmatism due to use of a polarized-beam splitter, thus ensuring high-resolution projection images. A wire-grid polarized-beam splitter (or the like) of a flat-plate-like structure is used as a polarized-beam splitter, and an astigmatism correction element, such as a cylindrical lens, is provided between the polarized-beam splitter and a projection lens unit.

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: A coating method for a color filter, including the steps of: coating a first photoresist layer on a substrate; forming at least a aligning pattern and a first color film pattern on the first photoresist layer by exposure and development; coating a first dye on the aligning pattern and the first color film pattern; stripping the first photoresist layer; coating a second photoresist layer on the substrate, wherein the aligning pattern and the first color film pattern are formed on the substrate; aligning position by using the aligning pattern of the substrate; forming a second color film pattern on the second photoresist layer by exposure and development; coating a second dye on the second color film pattern; and stripping the second photoresist layer. The invention also discloses an aligning-assembling method for a color wheel, which includes the color filter.

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: A color display device is disclosed. The color display device includes an illumination lens system, a diffractive light modulation system, a combining system, a Fourier filter system, and a projection system. The illumination lens system converts a plurality of light beams into linear parallel light beams. The diffractive light modulation system produces a plurality of diffracted light beams having a plurality of diffraction orders by modulating each of the plurality of parallel light beams that are almost perpendicularly incident from the illumination lens system, The combining system focuses the plurality of diffracted light beams having the plurality of diffraction orders. The Fourier filter system selects diffracted light beams having desired diffraction orders using a dichroic filter. The projection system focuses the diffracted light beams on an object, and allowing the focused diffracted light beams to scan the object.

Abstract: A projection system and a method of forming a color image are provided. A projection system includes a light source, a color splitter which splits light emitted from the light source into colors according to a plurality of wavelength ranges, a scrolling unit which scrolls the colors split by the color splitter, a polarization converter which converts the light emitted from the light source into light having a first polarization, a color selector which converts at least some of the light having the first polarization into light having a second polarization different from the first polarization, an image combiner which transmits or reflects light transmitted by the color selector according to a polarization direction, and at least two light valves each of which receives light transmitted by the image combiner and processes the received light according to an image signal to form an image.

Abstract: A light-splitting device comprises a filter element, a first transmission element, a second transmission element, and a power element. In this case, the first transmission element is disposed on one side of the filter element. The second transmission element connects with the first transmission element. The power element connects with the second transmission element, wherein the power element drives the rotation of the second transmission element, so that the second transmission element drives the rotation of the fist transmission element and the filter element.

Abstract: A method and a color rendering filter for compensating for deficiency in illumination light from a light source in display systems are provided. The color rendering filter has a color that is determined based upon the spectrum, sensitivity of viewer's eyes over the visible light range, and a pre-determined waveband threshold.

Abstract: A color prism capable of separating incident light into four color beams and synthesizing incident four-color beams, and a projection-type image display apparatus employing the color prism. The color prism includes: first through third triangular prisms each having two boundary surfaces which face the other two triangular prisms, and an outer surface which transmits or reflects incident light according to an incidence angle of the light; and first through third dichroic filters respectively interposed among the first through third triangular prisms and selectively transmits or reflects incident light according to wavelength so as to separate incident light into first through fourth light beams according to wavelength ranges and synthesize incident first through fourth light beams.

Abstract: A method for balancing a color wheel. The rotational unbalance vector of a driving motor is measured, including its unbalance amount and direction. The unbalance of a color wheel is adjusted to make its unbalance amount to be the same of the driving motor. The color wheel is connected to the driving motor so that the unbalance direction thereof is opposite to each other to reach an expected balance. The color wheel structure includes a set of color filter and a ring, before starting the assembly, adjusting the unbalance vector of the ring and motor shaft first, and then to assemble it and make the unbalance vectors opposite.

Abstract: An apparatus for providing both day vision simulations and night vision simulations includes a projector that seamlessly provides both night and daytime training modes. The projector includes two independent light sources, with an embedded night vision filter affixed inside the projector proximate one of the light sources to achieve the night training mode. The operator will select one light source according to the mode desired (daytime training mode or nighttime training mode). Each light source may easily be selected, and the light paths from both of the light sources may have a common path when exiting the projector for efficient operation between modes.

Abstract: There is provided a color wheel including a plurality of color filters arranged so as to form a disk, and a retainer member disposed at a center of the disk and formed into a C-ring defining an open mouth portion through which an area of one color filter is exposed. Also, there is provided a color wheel assembly which incorporates the color wheel described above, and which further includes a motor to rotate the color wheel, and a rotational position detector to optically detect a rotational position of the color wheel. Detection light emitted from the detector is set to fall incident on the C-ringed retainer member while the color wheel is rotated thus intermittently impinging on the open mouth portion, namely on the one color filter, which causes the detection light reflected thereby to come out with two different intensities that are sensed by the detector.

Abstract: According to the present invention, there is provided a light source device having a reflector including a light source lamp and an opening for emitting light for reflecting light radiated from the light source lamp arranged within the reflector to emit the light from the opening, and a glass arranged ahead of the opening of the reflector inclinedly by a predetermined angle with respect to a plane perpendicular to the optical axis of light emitted from the reflector. According to the light source device, the light source lamp is prevented from temperature rise and consequent overheat caused by light reflected on the glass thereby to return into the reflector.

Abstract: A projection system for both color and monochromatic displays includes a color wheel having filter portions of different colors and a clear portion; and a drive system configured to keep the color wheel moving while keeping a projection light beam shining through the clear portion of the color wheel.

Abstract: A process for making a unitary color filter disc includes the steps of preparing a disc member having an annular surface, and providing a plurality of differently colored segments on the annular surface. Each of the colored segments is provided by partially masking the annular surface to expose a part of the annular surface and by directly depositing a coloring film on the exposed part of the annular surface.

Abstract: There is provided a color wheel which includes: a color filter disk having a side surface; and a rotary member having a circumferential surface and adhesively attached to the center portion of the color filter disk. In the color wheel described above, a portion of an adhesive for fixing the rotary member to the color filter disk sticks out on the side surface of the color filter disk along the circumferential surface of the rotary member, and the portion of the adhesive sticking out, when hardened, functions as a barrier to prevent uncured portions, if any, of the adhesive present between the two components from getting scattered out in the radial direction on the side surface of the color filter disk when the color wheel is rotated at a high speed during the inspection process, thus improving the production yield rate.

Abstract: A projection display system includes a projection lens assembly that has multiple projection lens elements that are configured to receive light imparted with display information by a pixelated display device. The projection lens elements project the light toward a display screen. A pixel-shifting element is included within the projection lens assembly to cyclically shift between at least two positions within the projection lens assembly to form at a display screen at least two interlaced arrays of pixels. An electro-mechanical transducer is coupled to the pixel-shifting element to impart on it the cyclic shifting between positions.

Abstract: A color wheel assembly includes a carrier, a color filter assembly mounted coaxially on the carrier and formed by a plurality of annularly arranged filter segments, and a connecting unit including a plurality of annularly arranged limiting pieces connected respectively to the filter segments, and a limiting groove for receiving the limiting pieces. Each limiting piece has opposite first and second radial end faces, an inner face interconnecting the radial end faces, an outer face interconnecting the radial end faces and extending outwardly of the inner face, and a passage extending between the inner and outer faces and extending through the radial end faces. A press cover is connected to the carrier to press the filter segments against the carrier.

Abstract: A 2.2th-power to 1st-power conversion circuit 102 uses a 2.2th-power curve to convert an input R signal ‘a’ into an R signal ‘b’ expressed in a 1st-power signal space. Offsets, which are to be added to a G signal and a B signal, at each tone of the R signal ‘b’ expressed in the 1st-power signal space have been stored in advance in a GLUT 112 for R and a BLUT 113 for R. In response to input of the R signal ‘b’, the GLUT 112 for R and the BLUT 113 for R output the offsets, which are to be added to the G signal and the B signal, according to the tone value of the R signal ‘b’. An adder circuit 122 adds offsets ‘c’ and ‘d’, which are output from an RLUT 114 for G and an RLUT 116 for B, to the R signal ‘b’ output from the 2.2th-power to 1st-power conversion circuit 102, so as to give an R signal ‘e’. A 1st-power to 2.2th-power conversion circuit 132 reversely converts the R signal ‘e’ according to the 2.2th-power curve.

Abstract: A projector includes a lamp, a ballast, a micro controller unit and an optical engine. The lamp emits a light ray. The ballast starts the lamp and selectively outputs an operating power and a blanking power to the lamp. The micro controller unit controls the ballast. The optical engine receives the light ray and outputs a projecting image to a screen outside the projector. When the projector enters a blanking mode from a normal operating mode, the micro controller unit outputs a control signal to the ballast, and the power supplied from the ballast to the lamp is changed from the operating power to the blanking power.

Abstract: A multi-layer film, wherein a ratio H/L or L/H, a balance in optical film thickness between a high-refractive-index layer H and a low-refractive-index layer L, is set within a range of 1.2–2.0 to bias a balance in thickness. A method of producing a dielectric multi-layer film, wherein, when a dielectric multi-layer film is formed, a proportion at which an optical film thickness is formed on a monitor substrate is made larger than usual. A UV reflection film, having a step difference in average transmittance of 70–90% at a specified half-power point and within a wavelength range of 430–450 nm, is provided on a substrate to form a UV cut filter. A UV reflection film at a specified half-power point, a step difference in average transmittance of 70–90% within a wavelength range of 430–450 nm, and a blue conditioning film having a transmittance of at least 90% within a wavelength range of 460–520 nm may be combined.

Abstract: A color wheel with dovetailed balancing groove, includes a motor, a metal ring and a set of color filter set. At a rotatable portion of the color wheel, such as the peripheral portion between the metal ring and the housing of the motor, or on the peripheral surface of the metal ring, a balancing groove with narrow opening and wider inside is formed thereon. Using the feature of a narrow opening and wider inside, glue is added into the opening and dries to become solid balancing material. The color wheel is less prone to deviate from the metal ring, even though a relative larger centrifugal force is induced and acted thereon while the color is running at higher speed and higher temperature.

Abstract: To provide a projector that hardly causes deterioration of an image resulted from stray light. A neutral density filter, of which posture can be fine-adjusted by a posture regulating mechanism, is placed in a space between a second dichroic mirror and a liquid crystal light valve. Thus, it is possible to remove stray light, corresponding to condensed light resulted from multi-pass through a field lens or the like, to the outside of a light path by merely tilting the neutral density filter adequately. It is thus possible to project an image having homogeneous brightness (illuminance at the white level) across the entire screen, which in turn makes it possible to project an image having no irregularities in color across the entire screen.

Abstract: A method for generating images includes shining a beam of light through a filter wheel to produce filtered light. The filter wheel includes red, green, and blue color segments and a fourth color segment that is not blue, green, red, or clear. The method also includes modulating the filtered light to form an image.

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 color-correcting polarizer is provided comprising a polarizer layer and at least one discotic film layer. The discotic film layer is optically transparent within the range of visible wavelength. The discotic film layer works as a polarizer in the wavelength ranges at least from 380 to 500 nm and/or from 600 to 780 nm. A liquid crystal cell comprising the color correcting polarizer is also disclosed.

Abstract: An image display device of the present invention is provided with a liquid crystal display panel for displaying an image in accordance with an input of a chrominance signal, a sensor for sensing light characteristics of external light, and a chrominance signal converter for converting a chrominance signal to be inputted into an image display section in accordance with an output of the sensor. The chrominance signal converter includes a target display color setting section for setting a color to display as an image agreeable with chromatic adaptation characteristics of human, according to the output of the sensor, and a color reproduction section for reproducing a target color set by the target display color setting section, by using three primary color with chromaticities suitable for the output of the sensor. The target display color setting section converts the chrominance signal into a chrominance signal of the target display color reproduced by the color reproduction section.

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 invention relates to a video projection system comprising at least a light source coupled to a reflector for focusing the light beam, a motor-driven color wheel having a plurality of light-transmitting segments, at least some of said segments being dichroic filters for the colors red, green, and blue, while the speed of rotation of said wheel can be modified by a control, a lens system imaging the focused light beam onto a display, a display system comprising at least a display and a display control, and a projection lens, wherein the video projection system has a video projection mode and a lighting mode, and in addition the color wheel is stationary in the lighting mode and at least one segment of the color wheel can be given a defined position in the beam.

Abstract: A method of producing an image display device used for an LCD projector by providing a periodic structure of pixels arranged in a matrix and a substrate supporting the pixels, modulating light entering from an entrance surface in pixel units, and emitting the same from an exit surface. A phase shift structure for randomly changing the phase of the light is formed on a surface of the substrate. The phase shift structure has a relief structure formed, for example, by etching the surface of the substrate through which light passes to random depths. Therefore, occurrence of high-order diffracted light caused by the periodic structure of very fine pixels is prevented, and accordingly the amount of 0th order light inherently required is increased.

Abstract: Aspects of the invention can provide an illuminator and others, which are able to supply polarized light having a certain oscillating direction as well as a certain wavelength range with high efficiency, and are suitable for a single-plate type projector using an LCD type spatial light modulator. The illuminator can include a light source, a rod integrator, a reflective polarizing plate, and a color filter. A reflecting mirror reflects polarized light, which has been reflected by the reflective polarizing plate, got injected into the rod integrator again through an emitting end, and progresses in the direction toward an injection end, in the direction toward the emitting end.

Abstract: An image projector is disclosed. The image projector includes a lamp emitting light rays, a filtering unit having a first device including a plurality of color filters including a white color filter each formed to correspond to a section therein, and a second device including a plurality of color filters except a white color filter each formed to correspond to a section therein and formed at one side of the first device, and filtering the light rays emitted from the lamp through any one of the first device and the second device, a rod lens focusing and projecting the light rays separated from the filtering unit, and a digital micromirror device displaying an image through electric signals in accordance with the projected light rays.

Abstract: The invention provides a fine dichroic color-filter array. In particular, dichroic filter layers for B, R, and G, respectively, are patterned facing the corresponding blue pixel-electrodes, red pixel-electrodes, and green pixel-electrodes. The filter layers can be stacked on top of one another while being separated by transmissive interlayers.

Abstract: A method for transmitting light in an image display system includes generating a beam of light from a light source. The beam of light is directed at a first segment of an electronically-switchable filter. A first portion of the beam of light is accepted by the first segment of the electronically-switchable filter, and a second portion of the beam of light is rejected by the first segment of the electronically-switchable filter. The first portion of the light beam is modulated to produce at least a portion of a displayed image. The second portion of the light beam is recycled to redirect the second portion of the light beam at a second segment of the electronically-switchable filter. The second portion of the light beam is accepted by the second segment of the electronically-switchable filter. The second portion of the light beam is modulated to produce at least a portion of the displayed image.

Abstract: The addition of DMD illumination modulator(s) 702 in series with projection SLM(s) 706/709 to produce high-performance projection displays with improved optical efficiency, reliability, and lower maintenance requirements. This approach eliminates the vibration, audible noise, and safety problems associated with high speed rotating color filter wheels 203 commonly used in SLM projectors and controls the light applied to individual areas of the projection SLM(s).

Abstract: A technique for providing a desired level of color balance in field sequential color systems with brightness enhancement. In color wheels having a spectrally-broad transmissive segment, the spectrally-broad segment has a transmittance that is selected to provide a desired level of color balance. This can include transmittance characteristics that are inversely related to the spectral characteristics of the light source or optics. In color switches, this can include varying the amplitude and time duration of the contribution from each of the three primary colors.

Abstract: A projected image is created by receiving an image represented in a colorspace onto a projector device. The image is parsed into two or more color image components of the colorspace having two or more different resolutions. The two or more color image components of the colorspace are projected in two or more different resolutions superimposed and coincident with each other to make the image.

Abstract: An image display apparatus is capable of recycling the “OFF” state light to increase the image brightness and contrast. The image display apparatus includes a light source, a spatial light modulator, a total internal reflection (TIR) prism, a projection lens set, and a reflector. The spatial light modulator selectively modulates a light beam from the light source to a first path to form a first path light beam or to a second path to form a second path light beam. The TIR prism disposed between the light source and the spatial light modulator is configured to allow the light beam to travel therethrough in a first direction and to be incident on the spatial light modulator. The projection lens set disposed between the modulator and a screen is configured to project the first path light beam to form an image on a screen. The reflector is configured to reflect the second path light beam to form a reflected light beam that is incident on the TIR prism in a second direction as a recaptured light beam.

Abstract: A color wheel is attached to a hub of a motor before the hub is built in the motor. In this process, portions of the hub which do not impact the rotation accuracy of the motor are held by appropriate clamping means and attaching means so that excessive stress and heat are not applied to bearings of the motor. Then, the hub with the color wheel attached thereto is assembled to the rest of components of the motor.

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 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.