Abstract: A half mirror layer has an angle dependency in which when an angle of incidence becomes larger than the angle of incidence range of image light, reflectance increases, such that it is possible to prevent unintended light, which is emitted to a light transmitting member from a light guiding member and is reflected inside a light transmitting member, from being returned to a Eight emission portion of the light guiding member after passing through the half mirror layer as a reflective film at a relatively large angle of incidence. Therefore, it is possible to prevent the image light passed through the light transmitting member from becoming ghost light while mitigating the demand for increasing processing accuracy of the light transmitting member, and bonding accuracy between the light guiding member and the light transmitting member, to provide a high quality virtual image displayed by a virtual image display device.

Abstract: An advantage of some aspects of the invention is to provide a virtual image display apparatus in which occurrence of luminance spots is suppressed to improve efficiency of use of illumination light. In the virtual image display apparatus of the invention, an optical-directivity changing section forms a non-uniform distribution concerning the directivity of image lights GL emitted from an image display device. Therefore, even when an angle of a light beam emitted from the image display device and effectively captured into the eye EY of an observer is substantially different depending on a position of the image display device, it is possible to form the image lights GL having directivity corresponding to such an angle characteristic of light beam capturing. It is possible to suppress occurrence of luminance spots to improve efficiency of use of illumination light.

Abstract: Providing an image extraction section with a plurality of video light reflection surfaces that are Fresnel-shaped reflection surfaces allows reduction in the thickness of a light guide apparatus and hence the thickness and size of a virtual image display apparatus. In particular, providing a dispersion elimination section for eliminating wavelength dispersion in correspondence with the image extraction section suppresses image deterioration resulting from dispersion (chromatic aberrations) on a wavelength band basis.

Abstract: A light guide device includes an incident section, a parallel light guide body for light guide, and an emitting section. The emitting section includes a reflection unit formed by arraying a plurality of mirrors. The plurality of mirrors configuring the reflection unit are reflection elements having reflectance of P polarized light lower than reflectance of S polarized light. The plurality of mirrors configuring the reflection unit can be accompanied by wavelength plates to be adjacent to the mirrors.

Abstract: First and second display devices have first and second common display areas in which image display with common content to left and right eyes is performed. At least one of the first and second display devices has an extended display area. A display control unit generates a signal including common image information for the first and second common display areas and extension image information for the extended display area.

Abstract: A light guide device that does not cause non-uniformity in image light and external light and does not cause ghosts, and a virtual image display apparatus provided with the light guide device. The light guide device includes a parallel light guide, an incident section, and an emission section. Here, the light guide device is set such that image light rays are reflected without reflecting from a boundary surface between the parallel light guide and the reflection unit and head for an observer. Thus, the image light rays only pass through half mirrors, which are positioned in positions where the image light rays are emitted from the reflection unit of the emission section or are positioned therearound. Accordingly, it is possible to prevent luminance non-uniformity or light reduction by reducing the number of times of the image light rays to be observed pass through the half mirrors.

Abstract: A half mirror layer has an angle dependency in which when an angle of incidence becomes larger than the angle of incidence range of image light, reflectance increases, such that it is possible to prevent unintended light, which is emitted to a light transmitting member from a light guiding member and is reflected inside a light transmitting member, from being returned to a light emission portion of the light guiding member after passing through the half mirror layer as a reflective film at a relatively large angle of incidence. Therefore, it is possible to prevent the image light passed through the light transmitting member from becoming ghost light while mitigating the demand for increasing processing accuracy of the light transmitting member, and bonding accuracy between the light guiding member and the light transmitting member, to provide a high quality virtual image displayed by a virtual image display device.

Abstract: In a projection system, providing a stop that forms an opening that is symmetric with respect to a first flat plane including the projection system optical axis and a first axis that extends in parallel to the first direction and intersects the projection system optical axis but asymmetric with respect to a second flat surface including the projection system optical axis and a second axis that extends in parallel to the second direction and intersects the projection system optical axis allows appropriate light adjustment at the stop even when pencils of light from the points in a video device exit at different angles along a second direction, whereby high-quality video images can be provided with the size of an optical system further reduced and therefore the size of an overall virtual image display apparatus reduced.

Abstract: An apparatus has a see-through configuration that guides picture lights by a light guide device and superimposes lights from the outside world and the picture lights for visual recognition. The light guide device has a light guide prevention structure (light transmission prevention structure) provided in a narrow width shape part having a narrower shape than a surrounding part, and thereby, prevents unintended reflection or the like of lights due to the lights from the outside world and suppresses light guide of the lights toward an observer side.

Abstract: In a frame part, a center portion having a thick structure is provided between a first optical member as a first light guide unit and a second optical member as a second light guide unit to connect to both and fixes relative positions of the first optical member and the second optical member by the center portion, and thereby, reduction in weight and size of the frame part is realized.

Abstract: In a light guide device, a step between optical surfaces connected to each other by a connection portion can be limited (e.g., to 1 mm or smaller) so that a large stepped portion is not allowed to be formed at the connection portion in a hard coat formation process, whereby a coating liquid that flows along portions that are to form the optical surfaces forms no liquid pool or causes no liquid sagging. The light guide device can thus maintain satisfactory light guiding performance at the light guide portion.

Abstract: In a connection portion connecting a first reflective surface and a second reflective surface, the first reflective surface positioned relatively on an incidence side of video light is made to protrude toward an observer side beyond the second reflective surface positioned relatively on an emission side of video light, and a connection surface which is a surface of the connection portion is shaped to extend from a side close to the observer toward a side away from the observer between the first reflective surface and the second reflective surface.

Abstract: 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.

Abstract: In a projection system, a nonaxisymmetric aspheric surface is used as a surface that is located in a position where in a pencil of light of video image light that exits from each of two points in different corner regions in an image plane that is a light exiting plane of an image display apparatus, light components that should reach a viewer's eyes do not intersect one another, whereby the size of an optical system can be further reduced and the size of an overall apparatus can therefore be reduced with a variety of types of optical precision, such as the resolution and angle of view, maintained.

Abstract: A wearer of a virtual image display apparatus can adjust the position of the virtual image display apparatus relative to the position of each of the wearer's eyes by using a registration mechanism while checking a marker member that is a positioning member, whereby an optimum adjusted position is readily achieved. Further, registration according to person-to-person differences in the position of each of the eyes can be readily achieved, whereby it is not necessary to increase the light flux width of image light in advance or provide the image light with a margin so that the wearer can recognize an image even when the position of the eye deviates from a normal position to some extent, and the size of the apparatus will not increase.

Abstract: In a light guide device, a step between optical surfaces connected to each other by a connection portion can be limited to 1 mm or smaller so that a large stepped portion is not allowed to be formed at the connection portion in a hard coat formation process, whereby a coating liquid that flows along portions that are to form the optical surfaces forms no liquid pool or causes no liquid sagging. The light guide device can thus maintain satisfactory light guiding performance at the light guide portion.

Abstract: imagelight and outside light are viewed to overlap in a half mirror layer which is a semi-transmissive reflection unit from a state in which a polarization property of the outside light is canceled by a depolarization member disposed more outside than a light-guiding region of the imagelight.

Abstract: A transmissive display apparatus allows see-through observation in which video light and outside light are superimposed on each other for visual recognition of the superimposed light and further allows a light control shade to control the outside light by changing the outside light transmittance of the light control shade in accordance with a change in quantity of the outside light. In this case, in particular, when a decrease in the outside light quantity is detected with an outside light sensor, which is the outside light detection section, a light quantity control section of a primary control section performs quick response control in which the transmittance of the light control shade is quickly adjusted (outside light quantity is controlled).

Abstract: A light guide device may be incorporated into a virtual image display apparatus, and functionally includes a light-incident part for entrance of picture lights, a light guide part that guides the picture lights via the light-incident part, and a light-exiting part that outputs the picture lights from the light guide part to a position of an eye. In the light guide device, light guide that enables non-diffraction virtual image formation is performed with respect to lateral first directions and a pupil size is enlarged by first and second diffraction optical elements with respect to longitudinal second directions.

Abstract: Providing an image extraction section with a plurality of video light reflection surfaces that are Fresnel-shaped reflection surfaces allows reduction in the thickness of a light guide apparatus and hence the thickness and size of a virtual image display apparatus. In particular, providing a dispersion elimination section for eliminating wavelength dispersion in correspondence with the image extraction section suppresses image deterioration resulting from dispersion (chromatic aberrations) on a wavelength band basis.