Class / Patent application number | Description | Number of patent applications / Date published |
353081000 | PRISM IN LIGHT PATH | 46 |
20080218700 | BAR-TYPE DISPLAY DEVICE USING DIFFRACTIVE LIGHT MODULATOR - Disclosed herein is a display device using a diffractive light modulator. The display device includes a light source unit, a light condensing unit, an illumination unit, a diffractive light modulator, a light path adjustment unit, and a projection unit. The light path adjustment unit causes the linear light to enter the diffractive light modulator, and emits the diffracted light along a line extending from an incident light path. | 09-11-2008 |
20080239247 | LIGHT SOURCE AND PROJECTOR - A light source device includes a discharge lamp and a reflection mirror having a plurality of concave curved surfaces. Each of the plurality of concave curved surfaces is an ellipsoidal surface. A first focal point of each of the ellipsoidal surfaces is disposed at the light emitting center of the discharge lamp. A second focal point of each of the ellipsoidal surfaces is disposed, when viewed from a predetermined first direction perpendicular to a system optical axis passing through the light emitting center, on the opposite side of the system optical axis to the ellipsoidal surface, and when viewed from a second direction perpendicular to the system optical axis and the first direction, on the side where the ellipsoidal surface is present with reference to the system optical axis. | 10-02-2008 |
20080259290 | PROJECTION APPARATUS - A projection apparatus including an illumination system, a reflective light valve, at least one field lens and, an imaging system is provided. The illumination system is for providing an illumination beam and the reflective light valve is on a transmission path of the illumination beam to convert the illumination beam into an image beam. The field lens is disposed to face a reflective surface of the reflective light valve and on transmission paths of the illumination beam and the image beam. The imaging system includes a projection lens and a first reflective element, in which the first reflective element is on a transmission path of the image beam, and outside the transmission path of the illumination beam, so as to reflect the image beam to the projection lens. An optic axis of the projection lens is perpendicular to a normal vector of the reflective surface of the reflective light valve. | 10-23-2008 |
20080273178 | THIN MICROPROJECTOR WITH SWITCHED BEAM BENDER AND METHOD OF OPERATING THE SAME - A video projector includes a reduced size spatial light modulator ( | 11-06-2008 |
20080297734 | PROJECTION DISPLAY DEVICE AND METHOD FOR CONTROLLING OFF-BEAMS THEREOF - A projection display device and a method for controlling off-beams thereof are provided. The projection display device includes a case, a light source which is disposed in the case and outputs color light, a digital micro mirror device (DMD) which is disposed in the case, and controls micro mirrors and reflects the color light received from the light source, thereby outputting on-beams and off-beams, and an output unit which is disposed in the case and allows the off-beams output from the DMD to be projected to the outside of the case. Accordingly, the off-beams output from the DMD are output to the outer case through a shutter, prism, color filter, or an integral lens, so that a color of the outer case can be adjusted and also an exterior of the projection display device can be brightened. | 12-04-2008 |
20080309888 | Stage projector structure - A projector structure, such as a stage use projector, is provided for managing light projection and suitable for replacing a “Gobo” device. The projector structure has a digital micromirror device (DMD) and a refraction and/or reflection device for circulating light beams (R) around the digital micromirror device and maintaining the coaxiality between the light source and the projection lenses. | 12-18-2008 |
20090051883 | X-PRISM FOR USE IN PROJECTOR - An x-prism provides four triangular prisms each of which includes a hypotenuse side, a first side surface adjoining the hypotenuse side surface, a second side surface perpendicular to the first side surface, a first end surface and an opposite second end surface, the first and second end surfaces being at opposite sides of each of the triangular prisms, the triangular prisms being attached to each other with the hypotenuse side surfaces thereof facing outward. The four triangular prisms includes at least two triangular prisms with the first end surfaces thereof being coplanar with each other, and at least one triangular prism with the first end surface thereof being non-coplanar with the first end surfaces of the other triangular prisms. | 02-26-2009 |
20090122272 | PROJECTION APPARATUS USING SOLID-STATE LIGHT SOURCE ARRAY - An illumination apparatus for a digital image projector, the illumination apparatus has a plurality of solid-state laser arrays, each laser array with one or more rows of laser. A light combiner has an output optical axis and a plurality of light-redirecting prisms arranged in a stack. Each light-redirecting prism has at least one contact surface that extends parallel to the output optical axis and is in optical contact with an adjacent prism in the stack and a light redirecting facet that is disposed at an oblique angle to the at least one contact surface. | 05-14-2009 |
20090168028 | PROJECTION SYSTEM - A total internal reflection prism comprises at least two subprisms. The at least two subprisms define an airgap of a uniform thickness following a one-dimensional curve. | 07-02-2009 |
20090185144 | Illuminating Spartial Light Modulators Using an Anamorphic Prism Assembly - According to particular embodiments, an illumination system includes a light source that generates light for use in illuminating a spatial light modulator and an assembly of two optical elements spatially separated by a gap that receives the light from the light source, changes the shape of the light, and transmits the light onto the spatial light modulator. | 07-23-2009 |
20090190101 | Double-Reverse Total-Internal-Reflection-Prism Optical Engine - A device for a light projection system comprises at least one light source; light collection and relay optics; a reflective surface; a micro-display; an illumination total internal reflection TIR-prism disposed between the reflective surface and the micro-display; an imaging TIR-prism disposed between the illumination TIR-prism and the micro-display; and a projection lens. The light collection and relay optics is arranged to channel light emitted by the at least one light source to the illumination TIR-prism. The TIR-prism is arranged to totally internally reflect the light to the reflective surface. The reflective surface is arranged to reflect the light back through the illumination TIR-prism and through the imaging TIR-prism to the micro-display. The micro-display is arranged to reflect the light back through the imaging TIR-prism. The imaging TIR-prism is arranged to totally internally reflect the light from the micro-display to the projection lens. | 07-30-2009 |
20090262311 | Projector with reduced size and higher contrast - A projector with reduced size and higher contrast includes a prism assembly, a light system, and a Digital Micro-mirror Device (DMD). Only In the “ON” state of DMD, the light from the light system reflects to a projection screen through the prism assembly and the DMD. The prism assembly includes two prisms and a medium layer. The prism assembly is appropriately designed so as to disable the light in the “OFF” state from reflecting to the projection screen by two-time total internal reflection in the prism assembly, and also to reduce the size of the projector. | 10-22-2009 |
20100007860 | Composite optical element and projection optical device - A composite optical element is provided. The composite optical element includes a plurality of optical elements, in which at least one of the optical elements is formed of an element modifying an optical path and the other optical elements are bonded to an incident surface and/or exit surface of the element modifying the optical path with a low refractive index material layer in between. | 01-14-2010 |
20100026969 | Projection system - A projection system is disclosed. An object of the present invention is to provide a projection system that is able to present brighter images efficiently. A projection system includes a plurality of light sources generating lights, a light source composition part comprising a plurality of protrusions facing the light sources, respectively, to compose the lights incident from the light sources, and an optical system emitting the light outside from the light source composition part. | 02-04-2010 |
20100026970 | Image display device - The eyeglass-mountable image display device is an image display device which includes an image projection part and a clip which is mounted on the image projection part. The image projection part is held on eyeglasses by the clip which clamps a part of a lens portion of the eyeglasses from both surface sides of the lens portion. | 02-04-2010 |
20100060864 | STRUCTURE FOR PROJECTOR WITH COLOR SENSOR - A projector with a color sensor module is provided. The projector includes a light source providing a light, a prism device refracting the light, a reflecting device reflecting the light refracted by the prism device, an optical lens receiving the light reflected by the reflecting device and forming a first light path between the optical lens and the reflecting device, and a color sensor module disposed on a second light path and comprising a light inlet receiving the light reflected toward the second light path by the reflecting device. | 03-11-2010 |
20100091253 | IMAGE PROJECTION AND DETECTION APPARATUS - An image projection and detection apparatus including an illumination system, a digital micro-mirror device (DMD), an optical detector, and a total internal reflection (TIR) unit is provided. The illumination system provides an illumination beam. The DMD is disposed in an optical path of the illumination beam, and includes a plurality of micro-mirror structures switched between an on-state and an off-state. When at least a part of the micro-mirror structures are in the on-state, they reflect the illumination beam into an image beam transmitted to an object side. When at least a part of micro-mirror structures are in the off-state, they reflect an object beam from the object side to the optical detector. The TIR unit includes a first TIR surface and a second TIR surface. The first TIR surface totally reflects the illumination beam to the DMD. The second TIR surface totally reflects the object beam to the optical detector. | 04-15-2010 |
20100195061 | PROJECTION OPTICAL APPARATUS - A projection optical apparatus capable of providing high image quality and having a reduced size. The projection optical apparatus comprises a light valve and a projection optical system including a first optical system ( | 08-05-2010 |
20100220300 | PROJECTION DISPLAY APPARATUS - Provided is a projection display apparatus capable of avoiding decreasing efficiency in the use of a light beam propagating from a light source, thereby to display a high-quality image. The projection display apparatus includes: a light source for emitting a coherent light beam; a light valve having an image-forming region for modulating a light beam propagating from the light source, thereby to generate and emit an image light beam; a lighting-optical system for guiding to the image-forming region the light beam propagating from the light source; a projection-optical system for enlarging and projecting the image light beam emitted by the image-forming region; and a diffusion device located in the lighting-optical system and in the vicinity of a position optically conjugated with the image-forming region. The diffusion device has a structure in which a plurality of microscopic optical elements is regularly arranged on a base plane perpendicular to a propagation direction of a light beam propagating from the light source. | 09-02-2010 |
20100277702 | Laser Projection System With a Spinning Polygon for Speckle Mitigation - A laser projection system comprises: (i) a coherent light source including at least one laser configured to emit an output beam carrying signal data; (ii) a scanning optics, the scanning optics comprising at least one scanning reflector, the scanning reflector positioned in an optical path of the output beam; and (iii) a rotating polygon prism; wherein
| 11-04-2010 |
20100309443 | Projection apparatus and projection lens - A projection apparatus capable of projecting an image on a screen including a light valve and a projection lens is provided. The light valve is capable of generating an image beam. The projection lens is disposed in a transmission path of the image beam and disposed between the light valve and the screen to project the image beam to form the image on the screen. The projection lens has an optical axis. The light valve deviates an offset of X % from the optical axis in a first direction, and the image deviates an offset of Y % from the optical axis in a second direction. The first direction is opposite to the second direction. The projection lens includes a lens group and an anamorphic device. The anamorphic device is disposed in a transmission path of the image beam and disposed between the lens group and the screen to make X %12-09-2010 | |
20100328623 | Projector apparatus - The invention provides a projector apparatus incorporating a prism optical system of positive refracting power working for size reductions, which apparatus comprises a display device | 12-30-2010 |
20110007284 | METHOD AND APPARATUS FOR USE IN PROJECTING IMAGES - A method and apparatus relate to a projection module having an input port with light source module mounting structure, an output port with lens module mounting structure, an image forming section, and optics. The method and apparatus involve: routing radiation arriving through the input port along a first path of travel defined by the optics to the image forming section; generating images at the image forming section from the radiation arriving along the first path of travel; and routing images from the image forming section to and through the output port along a second path of travel defined by the optics. | 01-13-2011 |
20110058146 | PICO PROJECTOR APPARATUS - The invention discloses a projector apparatus for projecting an image onto a surface, comprising a light source module for generating a single first light path; a light beam homogenizer for inputting first light path to perform beam homogenization over the first light path; an illumination lens set for inputting the homogenized first light path and re-directing the first light path to a second light path, the first light path and the second light path forming an positive angle; a reflection-type image generator for generating said image; a prism set for inputting said second light path and outputting the second light path onto the reflection-type image generator, wherein the reflection-type image generator reflects the second light path and forming a third light path carrying said image, the third light path being reflected by said prism set to forming a fourth light path; an image projection lens set disposed on the fourth light path for projecting said image onto the surface. | 03-10-2011 |
20110063583 | ILLUMINATION OPTICAL SYSTEM AND PROJECTION DISPLAY APPARATUS - The illumination optical system of the present invention guides a luminous flux from light source | 03-17-2011 |
20110122374 | IMAGE PROJECTING DEVICE AND PRISM - An image projecting device, including an image forming element for forming an image, a light source for generating light, and an imaging optical system for imaging an image formed by the image forming element on a screen, a first prism having a first transmission surface for transmitting light generated from the light source therethrough, a reflection curved surface being a curved surface for directly reflecting light having transmitted through the first transmission surface, a reflection-transmission surface for directly reflecting light reflected from the reflection curved surface to the image forming element and transmitting light reflected from the image forming element therethrough, and a second transmission surface for transmitting light reflected from the reflection-transmission surface and light reflected from the image forming element therethrough, and a second prism for directing light having transmitted through the reflection-transmission surface of the first prism to the imaging optical system. | 05-26-2011 |
20110134398 | Projection System - The invention discloses a projection system including a light source, a light gathering device, an imaging device, and a projection lens. The light source is used for emitting a first light, and the light gathering device includes an aperture and a lens for receiving the first light in sequence and producing a second light. The imaging device includes a field lens and a reflective valve near the field lens, and the field lens and the reflective valve are used for receiving the second light in sequence and producing an exit pupil. The projection lens has an entrance pupil, and the entrance pupil substantially overlaps the exit pupil. | 06-09-2011 |
20110199586 | PROJECTOR AND ANAMORPHIC PRISM OPTICAL UNIT - A projector includes an anamorphic prism optical system for converting an aspect ratio of an irradiation region on which the video light is irradiated. The anamorphic prism optical system includes a first prism set and a second prism set. The first prism set is obtained by combining a first prism and a second prism, and the second prism set is obtained by combining a third prism and a fourth prism. The first prism, the second prism, the third prism, and the fourth prism are respectively rotatable around rotation axes thereof, and a space between the first and second prism sets is adjustable in association with the rotation of the first prism, the second prism, the third prism, and the fourth prism. | 08-18-2011 |
20110205501 | Illumination System For Laser Projection - A color combining apparatus has first, second, and third color channels, each color channel having a light source that is energizable to direct light of a corresponding first, second, or third wavelength band, respectively, toward a color combining element. The color combining element is a single piece of a solid, transparent material having at least first and second flat coated surfaces that are noncontiguous. The first coated surface is treated to reflect incident light of the first wavelength band onto an optical axis and to transmit incident light of the second and third wavelength bands. The second coated surface is treated to reflect incident light of the second wavelength band and to transmit incident light of the third wavelength band. | 08-25-2011 |
20120013855 | Laser Scanning Imaging System with Reduced Speckle - An imaging system ( | 01-19-2012 |
20120019789 | REAR-PROJECTION DISPLAY - Various embodiments related to rear-projection image display are disclosed. For example, one disclosed embodiment provides a projector for projecting an image and a screen configured to display the image. The screen comprises a filter layer having a light reception side and an image display side. The filter layer includes an array of trapezoidal transmissive elements and an array of trapezoidal absorption elements, where a wider base of each of the trapezoidal transmissive elements faces the light reception side of the filter layer, and where a wider base of each of the trapezoidal absorption elements faces the image display side of the filer layer. | 01-26-2012 |
20120120373 | IMAGE PROJECTOR - An image projector includes a first deflector configured to deflect a first optical path and to form a second optical path, a second deflector configured to deflect the second optical path and to form a third optical path, a shifter configured to shift a projection lens in a vertical direction which corresponds to a longitudinal direction of the projected surface among directions orthogonal to an optical axis of the projection lens, a housing configured to house the first deflector and the second deflector, and a fixed plate fixed onto the housing at an end on an installing surface side of the housing, the projection lens and the shifter being fixed onto the fixed plate, wherein the third optical path is closer to an installing surface of the housing than the first optical path. | 05-17-2012 |
20120147338 | PROJECTION LENS OF AN IMAGING MODULE AND IMAGING MODULE - A projection lens of an imaging module and the imaging module are provided. The imaging module further has a light modulator to project a first image with a first aspect ratio. The projection lens comprises an anamorphic lens set and a projection lens set. The anamorphic lens set comprises a first cylinder lens, a second cylinder lens, a bi-convex cylinder lens and a bi-concave cylinder lens, which are set after the light modulator in sequence. The first cylinder lens has at least one flat surface, and the second cylinder lens has at least one convex surface. The anamorphic lens set projects the first image with the first aspect ratio into a second image with a second aspect ratio; the second aspect ratio is different from the first aspect ratio. The projection lens set receives and projects the second image with the second aspect ratio. | 06-14-2012 |
20120268720 | OPTICAL DEVICE, METHOD FOR MANUFACTURING THE SAME, AND PROJECTOR APPARATUS INCLUDING THE SAME - An optical device includes a first prism unit, a second prism unit spaced apart from the first prism unit, and a spacer unit disposed between the first and second prism units. Each of the first and second prism units includes a substrate, an anti-reflection coating, and a prism. The substrate has a first surface disposed to face the other one of the first and second prism units, and a second surface opposite to the first surface. The anti-reflection coating is disposed on the first surface of the substrate. The prism is disposed adjacent to the second surface of the substrate. The spacer unit is disposed between the anti-reflection coatings of the first and second prism units. | 10-25-2012 |
20120300180 | IMAGE PROJECTION APPARATUS PROVIDED WITH NO RELAY LENS - An image projection apparatus is provided, which includes an illumination unit which generates illumination light, a first prism which receives the illumination light from the illumination unit and performs total reflection of the illumination light, a reflection mirror which receives the illumination light from the first prism and reflects the illumination light, an image forming unit which forms an image from the illumination light that is reflected from the reflection mirror, and a second prism which performs total reflection of the image that is formed by the image forming unit toward a screen. | 11-29-2012 |
20120307213 | MICRO PROJECTION SYSTEM - A micro projection system includes a primary prism as a light guide device. The primary prism has a bottom face and two slope faces. A light source module and a collimation lens are arranged at the bottom face of the primary prism to project red, green, and blue lights onto one of the slope faces of the primary prism to be consolidated by a wedge prism group and reflected toward a polarization beam splitting wedge prism arranged at another slope face, where the light is split into two polarized lights that are then emitted out of the primary prism to be processed and combined as light of consistent polarization by a lens array and a polarization conversion film so as to facilitate condensation and projection of the light by a polarization beam splitter and a projection lens. | 12-06-2012 |
20130088691 | PROJECTION APPARATUS - The present invention provides a projection apparatus including a light source module, an illumination lens module, a light valve, and a projection lens. The light source module is configured to provide a first light beam, and the illumination lens module and the light valve are disposed on a first propagating path of the first light beam. The illumination lens module has a first optic axis. The light valve is configured to transfer the first light beam into a second light beam with an image, and the first light beam propagates through the illumination lens module to the light valve without reflection. The projection lens has a second optic axis substantially perpendicular to the first optic axis. | 04-11-2013 |
20130128239 | PROJECTING APPARATUS - A projecting apparatus is disclosed, which is disposed within a space defined with first, second and third imaginary planes perpendicular to one another and includes a light source, a prism, a reflecting mirror, and a reflective light valve. The light source emits a light beam propagating along a first optical path parallel with the first and second imaginary planes. The prism is disposed in the first optical path, and refracts the light beam to propagate along a second optical path. The reflecting mirror is disposed in the second optical path, and reflects the light beam to propagate along a third optical path. The reflective light valve is disposed in the third optical path, and has an active plane parallel with the second imaginary plane. Therefore, the light source can be placed horizontally with respect to the reflective light valve to reduce the space occupied by the light source. | 05-23-2013 |
20130182230 | PRISM SYSTEM AND METHOD THEREOF FOR ELIMINATING COLOR ABERRATION - A prism system and method for eliminating color aberration in an illumination system of a micro projector is disclosed. A light beam enters into a first prism through a light incident surface thereof and is further emitted through a light-emitting surface of the first prism. The light beam then enters into a second prism through a first interface thereof, passes through a second interface of the second prism and reaches a digital micromirror device (DMD). The light beam is reflected by the DMD so as to pass through the second interface and reach the first interface. The light beam is totally reflected by the first interface so as to be emitted through a third interface of the second prism. Therefore, the invention eliminates lateral color aberration that occurs in an active area of the DMD, reduces costs of illumination equipment and achieves a preferred projection effect. | 07-18-2013 |
20130188156 | OPTICAL SYSTEM FOR PROJECTION DISPLAY APPARATUS - This invention concerns an optical system for a projection display device that includes: a first lens which may emit light entering from a light source with a same angle to a single point; a second lens which is positioned in a way that the light collected from the first lens may be transmitted to a digital micromirror device (DMD) with a predetermined angle; a DMD which may reflect the light entering from the second lens; a prism positioned between the second lens and the DMD that transmits and transfers the light emitted from the second lens to the DMD, and transfers the light reflected from the DMD to a projection lens by totally reflecting the light; and a projection lens that is positioned in the optical path of the light totally reflected from the prism, to project the light onto a screen. According to this invention, as described above, by providing an optical system for a projection display apparatus that is asymmetrically positioned by implementing a symmetric lens that compensates for the optical path difference of light incident on a DMD from a light source, the manufacturing of the system becomes easy. In particular, the use of the symmetric lens makes the lens processing and tolerance management easier at a lower price during the lens production compared to the conventional asymmetric lens. Also, it is easy to set the placement between the symmetric lens and the prism. | 07-25-2013 |
20130242272 | PROJECTOR APPARATUS - In an illumination optical system for a DMD type projector, the TIR prism is configured such that a projection line, which is a normal to the total reflection surface vertically projected on the DMD surface, forms an angle other than 90° with a micromirror turning axis, an exit light projection line, which is a principal ray of light beam exits from the total reflection surface vertically projected on the DMD surface, forms an angle of 90° with the micromirror turning axis, and an incident light projection line, which is a principal ray of light beam incident on the total reflection surface vertically projected on the DMD surface, is located on the same side as the exit light projection line with respect to a straight line passing through an end point of the incident light projection line and extending parallel to a long side of the DMD. | 09-19-2013 |
20140036239 | IMAGE PROJECTING DEVICE - An image projecting device of the present invention includes an image display section for displaying an image, a projecting optical system for outputting the image along an optical path and projecting the image onto a projection surface, and a lens unit provided on any position on the optical path. The lens unit includes a lens section having a lens movable along at least two or more directions in a plane vertical to an optical axis of the projecting optical system, and a driving section having an actuator section for moving the lens section, and the actuator section is disposed so that a thrust line passes through a centroid of the lens section. The driving section moves the lens so as to tilt an optical axis of light emitted from the image display section, and move a display position of pixels on the projection surface composing the image displayed by the image display section. | 02-06-2014 |
20140160444 | PROJECTION APPARATUS AND LIGHT CONDENSING MODULE - A projection apparatus and a light condensing module are provided. The light condensing module condenses and deflects an incident beam. The light condensing module includes a curving incident surface, a curving outgoing surface and a reflection surface. The curving incident surface receives the incident beam. The curving outgoing surface is disposed on a transmission path of the incident beam from the curving incident surface. The reflection surface is disposed on the transmission path of the incident beam, and located between the curving incident surface and the curving outgoing surface. A ray of the incident beam propagates through the curving incident surface along the optical axis of the curving incident surface, and emits out from the curving outgoing surface along a direction inclined to the optical axis of the curving outgoing surface. | 06-12-2014 |
20150138515 | OPITCAL PROJECTION AND IMAGE SENSING APPARATUS - An optical projection and image sensing apparatus including a light source, a light valve, a first lens set, a sensing module, and a beam splitter is provided. The light valve is used to convert an illumination light from the light source to an image light beam. The first lens set is used to project the image light to display an image on a screen, and the sensing module is used to sense a sensing light from the image on the screen. The beam splitter is disposed on the optical paths of the image light and the sensing light from the image on the screen. One of the sensing module and the light valve is disposed on the optical path of the sensing light passing through the beam splitter, and the other is disposed on optical path of the sensing light reflected by the beam splitter. | 05-21-2015 |
20160195801 | Projector | 07-07-2016 |
20180024429 | HIGH CONTRAST DISCRETE INPUT PRISM FOR IMAGE PROJECTORS | 01-25-2018 |