| Patent application number | Description | Published |
|---|
| 20080291542 | PROJECTION LENS DEVICE AND PROJECTION DISPLAY APPARATUS USING THE SAME - A projection lens device includes, in order from a magnification side, a first lens group G | 11-27-2008 |
| 20090219624 | PROJECTION ZOOM LENS SYSTEM AND PROJECTION TYPE DISPLAY APPARATUS - The projection zoom lens system includes a negative first lens group, a positive second lens group, a third lens group, a positive fourth lens group, a fifth lens group, and a positive sixth lens group. The lens system is nearly telecentric on a reduction side. During zooming, the second to fifth lens groups are moved while the first and six lens groups remain stationary. The third lens group includes a positive lens L | 09-03-2009 |
| 20100020293 | PROJECTION VARIABLE FOCUSING LENS AND PROJECTION DISPLAY DEVICE - Disclosed is a projection variable focusing lens and a projection display device that has a reduction side which is telecentric, a high magnifying power, a small size, a light weight, and a low manufacturing cost and is capable of correcting all aberrations occurring when power varies with good balance. | 01-28-2010 |
| 20100020411 | PROJECTION VARIABLE FOCUSING LENS AND PROJECTION DISPLAY DEVICE - Disclosed is a projection variable focusing lens and a projection display device that has a reduction side which is telecentric, a high magnifying power, a small size, a light weight, and a low manufacturing cost and is capable of correcting all aberrations occurring when power varies with good balance. | 01-28-2010 |
| 20100053774 | SMALL PROJECTION LENS AND PROJECTION DISPLAY DEVICE USING THE SAME - A small projection lens includes a first lens, which is a biconvex lens, an aperture, an aperture diaphragm (or an aperture), a second lens, which is a negative meniscus lens having a concave surface facing a magnification side, a third lens, which is a positive meniscus lens having a convex surface facing a reduction side, and a fourth lens, which is a biconvex lens having aspheric surfaces at both sides on an optical axis, arranged in this order from the magnification side. | 03-04-2010 |
| 20100091246 | SINGLE PROJECTION DISPLAY DEVICE - Disclosed is a single projection display device in which illumination light that is emitted from a light source unit and is linearly-polarized is reflected at a right angle by a PBS and is then incident on a single reflective liquid crystal display device, and modulated light passes through the PBS and is then projected onto a screen by a projection lens. An intersection point between the optical axis of the projection lens and the reflective liquid crystal display device deviates from the center of the surface of the reflective liquid crystal display device. The normal line of a polarized light separation plane is parallel to a plane that is vertical to another plane formed by a surface normal at the center of the surface of the reflective liquid crystal display device and the optical axis of the projection lens and that includes the optical axis of the projection lens. | 04-15-2010 |
| 20100091247 | SINGLE PROJECTION DISPLAY DEVICE - Linearly polarized illumination light that is emitted from a light source unit and then reaches a polarized light separation plane along the optical axis of an illumination optical unit is reflected from the polarized light separation plane at a right angle and reaches a reflection optical unit. The reflection optical unit reverses the phase of the linearly polarized illumination light and reflects the illumination light to the polarized light separation plane. The illumination light passes through the polarized light separation plane and reaches a reflective liquid crystal display device. The reflective liquid crystal display device converts the illumination light into modulated light having image information thereon. In this case, the phase of the linearly polarized light is reversed again and reflected from the polarized light separation plane at a right angle to reach a projection lens. The light is enlarged and projected onto a screen. | 04-15-2010 |
| 20100232033 | OBJECTIVE LENS FOR ENDOSCOPE - An objective lens for an endoscope is provided and has a lens group A and a lens group B that are movable in a direction of an optical axis. In the objective lens, first focal adjustment for observing a point between a most-distant point and an intermediate point is performed by moving the lens group A from a lens arrangement for observing the most-distant point; and second focal adjustment for observing a point between the intermediate point to a nearest point is performed by moving the lens group B from a lens arrangement for observing the intermediate point. | 09-16-2010 |
| 20100315598 | PROJECTION OPTICAL SYSTEM AND PROJECTION-TYPE DISPLAY APPARATUS USING THE SAME - A projection optical system can achieve compactness and improve a state where polarized rays are separated by a polarized light separation section, without a separate optical system which makes the whole system telecentric, by using a reflective light valve. The projection optical system includes, in order, the reflective light valve, a projection lens and the polarized light separation section. The reflective light valve modulates incident illumination light in response to an input image signal and reflects and emits the modulated light. The projection lens transmits the illumination light incident to the reflective light valve and the modulated light emitted from the reflective light valve and is formed to be telecentric on the reduction side. The polarized light separation section separates the optical path of the illumination light incident to the projection lens from the optical path of the modulated light emitted from the projection lens. | 12-16-2010 |
