Patent application number | Description | Published |
20090153978 | Projection lens and projection device using the same - A projection lens and a projection device using the same are provided. The projection device comprises a projection lens and an optical element. The projection lens comprises a first lens group and a second lens group from an image side sequentially. The first lens group has a negative refracting power, and the first lens group includes an aspherical lens surface. The second lens group has a positive refracting power. The first lens group has a first focal length f | 06-18-2009 |
20090153986 | Wide-angle lens and projection device using the same - A wide-angle lens and a projection device using the same are provided. The wide-angle lens from an image side sequentially comprises a first lens group, a second lens group and a third lens group. The third lens group comprises an aperture stop. The first lens group has a negative refracting power, the second lens group has a positive refracting power, and the third lens group has a positive refracting power. A focal length f | 06-18-2009 |
20090231556 | PROJECTING SYSTEM AND LENS COMBINATION THEREOF - The invention discloses a projecting system. The projecting system includes two sets of lens. The first set of lens has a first focal length for focusing an incident ray of light to form a first image. The second set of lens has a second focal length for projecting the first image to form a second image. The two sets of lens are separated by a lens-apex distance relative to the light path between the two sets of lens. The second focal length is smaller than or equal to the lens-apex distance. A difference between the second focal length and the lens-apex distance is smaller than or equal to a half of the first focal length. | 09-17-2009 |
20100172022 | PROJECTING LENS AND PROJECTING APPARATUS USING THE SAME - A projecting lens for projecting a light of an image generating device onto a screen is provided. The image generating device has a light valve. The projecting lens includes a first lens group and a second lens group. The first lens group has an imaging optical axis and a first effective refractive power. The second lens group has a second effective refractive power, and is disposed between the first lens group and the light valve. The light projected from the light valve to the second lens group generates an intermediate image, which is focused on the screen via the first lens group to form an image. A center of the image and a center of the light valve are located on the same side of the optical axis, and a center of the intermediate image is located on the other side of the optical axis. | 07-08-2010 |
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 |
20110194079 | HIGH EFFICIENCY PICO PROJECTOR APPARATUS - A high efficiency projector apparatus for projecting an image onto a surface, comprising a light source module including a first light source, a second light source, a first light-modulation lens and a second light-modulation lens, a first and a second modulated light being respectively generated after the first and second light source are modulated by the corresponding light-modulation lens; a dichroic combiner for generating a single first light path by combing the first and second modulated light, the first light path defining a first direction; a light beam homogenization means 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; 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; wherein the light path generated by the second light source defines a second direction substantially perpendicular to the first direction, and, in respect to the second direction, the second light source is disposed in a space between the first light source and the image projection lens set, and wherein the light distributed on the light beam homogenization means are imaged conjugatedly on the image projection lens by the illumination lens according to a predetermined imaging relationship. | 08-11-2011 |
20110273672 | PROJECTOR APPARATUS UTILIZING WEDGE-TYPE LENS - A projector apparatus utilizing wedge-type lens for projecting an image onto a surface, comprising a light source module for generating a single first light path; an illumination lens set for inputting the first light path and outputting a second light path; 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; an image projection lens set disposed on the third light path for projecting said image onto the surface, wherein the illumination lens set including a wedge-type lens working with the prism set for providing a suitable angle of incidence and angle of emission to the reflection-type image generator, the wedge-type lens lowers the required height difference, between the light axles of the illumination lens and the reflection-type image generator, and lowers the angle of emission. | 11-10-2011 |
20120300296 | PROJECTION APPARATUS - The present invention provides a projection apparatus including an image generation device and a projection lens. The image generation device has a light valve, and generates a light. The projection lens includes a first lens group having an optical axis and a second lens group disposed between the first lens group and the light valve. The light generated from the light valve penetrates through the second lens group and forms an intermediate image between the first lens group and the second lens group. The intermediate image penetrates through the first lens group to form a projection image. A center of the projected image and a center of the light valve are disposed at a first side of the optical axis, and a center of the intermediate image is disposed at a second side of the optical axis different from the first side. | 11-29-2012 |
20120300318 | PROJECTION APPARATUS - The present invention provides a projection apparatus including an image generation device and a projection lens. The projection lens is disposed between a light valve of the image generation device and a projection screen, and the projection lens includes a plurality of lenses. The lenses include a first lens, a second lens and a third lens, and the first lens, the second lens and the third lens are aspherical lenses. An effective focal length of the projection lens is between 5 mm and 8 mm, and a sum of the effective focal length of the projection lens and a number of the lenses is between 14 and 17. | 11-29-2012 |
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 |