Patent application number | Description | Published |
20090168424 | LIGHT SOURCE DEVICE AND PROJECTOR - A light source device adapted to generate an illumination light beam for illuminating an illuminated surface includes a light source adapted to emit a light beam, a light path conversion member adapted to rotate around an axis perpendicular to a center axis of the light beam emitted from the light source to convert a light path of the light beam emitted from the light source, an overlapping illumination element adapted to overlap a light beam emitted from the light path conversion member on the illuminated surface, the overlapping illumination element having an entrance position of the light bream input to the overlapping illumination element varies with time, and a rotating section adapted to rotate the light path conversion member. | 07-02-2009 |
20140247500 | VIRTUAL IMAGE DISPLAY DEVICE - A light guide member which guides video light includes a peripheral area forming portion extending to the outside of an effective light flux guide portion which is an area through which an effective light flux of the video light passes, and thus for example, even when ghost light resulting from components generated by unintended reflection or scattering in a position such as a side surface forming portion of the light guide member may be generated, the side surface forming portion can be separated from the effective light flux guide portion. | 09-04-2014 |
20140267636 | VIRTUAL IMAGE DISPLAY DEVICE - An image display device performs control to provide light distribution characteristics in which a light distribution angle is wider in a horizontal direction corresponding to a lateral direction parallel to a direction in which eyes of an observer are arranged, rather than in a vertical direction corresponding to a longitudinal direction perpendicular to the direction in which the eyes of the observer are arranged, to thus obtain a state where the light distribution angle is wider in the horizontal direction, and the occurrence of a luminance difference by an emission angle of video light related to the horizontal direction can be suppressed. That is, it is possible to observe a good image in which the luminance of video light is adjusted and to reduce fatigue in the observer. | 09-18-2014 |
20150061975 | VIRTUAL IMAGE DISPLAY APPARATUS - A light guide member includes a plurality of non-axisymmetric curved surfaces, whereby a wide viewing angle and reduction in size and weight are achieved as the whole apparatus. A curved surface is formed such that a blur amount of video light on a position of an image surface of an intermediate image is greater (for example, greater than 10 times a blur amount on a position of an image surface of a video element). With this, even when there is a scratch, dust, or stain on the surface of the light guide member near the intermediate image or there is a contaminant or air bubble inside the light guide member, a situation in which the scratch or the like is enlarged and noticeable to degrade video quality is avoided, and high performance is achieved. | 03-05-2015 |
20150062697 | VIRTUAL IMAGE DISPLAY APPARATUS - An intermediate image is formed inside a light guide member by a projection lens or the like, whereby a small optical system having a wide viewing angle and high performance is provided. At least one curved surface among curved surfaces forming an optical system is an opposite-sign curvature curved surface having an opposite-sign curvature point different in curvature depending on direction, whereby the optical system is placed in a satisfactory aberration correction state. | 03-05-2015 |
20150062716 | VIRTUAL IMAGE DISPLAY APPARATUS - An optical system of a virtual image display apparatus is configured such that, in regard to a width in a first direction and a width in a second direction at a first surface position, and a width in a first direction and a width in a second direction at a second surface position corresponding to the width in the first direction and the width in the second direction at the first surface position, predetermined conditional expressions are established. With this, in an optical system for an HMD which includes a light guide member having a free-form surface, it is possible to allow video light to be emitted toward eyes in an appropriate state while controlling the light guide of video light accurately and maintaining high performance. | 03-05-2015 |
20150153573 | VIRTUAL IMAGE DISPLAY APPARATUS - A light guide member includes four or more curved surfaces (in a case of FIG. | 06-04-2015 |
20150153574 | VIRTUAL IMAGE DISPLAY APPARATUS - As a first prism and a second prism respectively have a third surface and a sixth surface, which are reflecting surfaces which are asymmetrical with respect to an axis, inside thereof, it is possible to correct an aberration, and to display an video having high performance. Furthermore, in the first prism, as a plurality of reflecting surfaces (a second surface and the third surface) is provided, it is possible to reduce a size and a weight of the apparatus. Furthermore, like the second surface and a fifth surface, as a surface which functions not only as a light incident surface that causes video light to be incident but also as a total reflecting surface which totally reflects the video light is provided, it is possible to further reduce a size of an optical system. | 06-04-2015 |
20150153575 | VIRTUAL IMAGE DISPLAY APPARATUS - With respect to an emitting side optical axis, which is an optical axis on a first surface, a sight line reference axis which is assumed as a sight line axis of the eyes of an observer extends in a slightly inclined direction. In particular, the emitting side optical axis with respect to the sight line reference axis is configured to approach the eyes from the outside (that is, a corner of the eyes) of the eyes. In addition, a long image in a vertical direction which is perpendicular to an alignment of the eyes rather than in the horizontal direction which corresponds to the alignment of the eyes, is displayed. | 06-04-2015 |