Abstract: A virtual image display apparatus includes an image projection apparatus that emits image light, and a display optical system that forms a virtual image according to the image light from a liquid crystal device (image forming device). The display optical system is configured by at least two members having different refractive indices and bends the image light a plurality of times between mediums having different refractive indices in a predetermined direction. A cumulative value of an index for chromatic dispersion with respect to the predetermined direction on a refractive surface of each bent portion is smaller than or equal to a predetermined reference value.

Abstract: A virtual image display apparatus includes a case member that stores a image element and is provided with a first end connected to other members, an optical component holding member with which an optical component guiding image light from the image element is assembled and that is provided with a second end connected to the first end, three or more protruding portions that are provided at one of the first end and the second end, have protrusion shapes, and extend toward the other end, three or more grooves that are provided at the other end, have depression shapes corresponding to the three or more protruding portions, and extend, and adhesive portions that fix the three or more protruding portions to the three or more grooves in a state in which the case member is aligned with the optical component holding member.

Abstract: An image display apparatus includes image displaying sections that present displayed images to a user and allow the user to visually recognize outside light, a first light adjusting member that is disposed on an outside-facing side of the image displaying sections and adjusts the transmittance based on outside light incident on the first light adjusting member, and a second light adjusting member that is disposed between the image displaying sections and the first light adjusting member and adjusts the transmittance in accordance with the transmittance of the first light adjusting member.

Abstract: A first lens and a second lens are bonded, and each of a light emitting plane and a light incident plane is a flat surface to shorten a configuration in an optical axis direction, and simultaneously, various optical elements such as a transmission/reflection selection member and the like can be mounted on a flat surface portion. Further, by providing a half mirror in a bonding portion between a convex surface and a concave surface to give power in folding an optical path, an image with a wide angle of view can be formed.

Abstract: A first lens and a second lens are bonded to each other and configured to be short in an optical axis direction. Further, by providing a half mirror in a bonding portion between a convex surface and a concave surface, power is given when folding an optical path, and additionally, by setting a refractive index of the first lens larger than a refractive index of the second lens, an image with a wide angle of view can be formed.

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 first and second display devices that are provided in a pair on the left and right sides, image light and external light are superimposed on each other and viewed. In this case, a parallax of an angle (the value of angle) is set by a frame unit functioning as a parallax setting unit tilting principal rays of left and right image light inwardly, and the angle of convergence of an observer is in an appropriate state in the case of viewing the image light.

Abstract: By forming a hard coat layer on a bonding surface which is a surface of a bonding region between a first base material and a second base material, smoothing is achieved, and as a smoothing assisting treatment before forming the hard coat layer, the surfaces of the base materials are flattened by polishing on the bonding surface or a region corresponding to the bonding surface. By the synergistic effect of smoothing by formation of the hard coat layer and a flattening treatment by polishing as the smoothing assisting treatment, sufficient smoothing is achieved.

Abstract: An image relay optical system is provided with an optical coupling member before incidence of image light on a light guide member. Among a first light incident surface, a coupling member reflecting surface, and a first light emitting surface provided in the optical coupling member, the coupling member reflecting surface and the first light emitting surface are curved surfaces. Therefore, a large bright virtual image with reduced aberration can be displayed.

Abstract: Disclosed herein is an indoor unit which can easily create a plurality of areas having different temperatures in a single indoor space, with even a single indoor unit. An indoor space is divided into a plurality of areas. An airflow direction adjusting flap provided at a blow-out opening is capable guiding blown air to each of the areas. An amount of heat to be processed for each of the plurality of areas by the air blown out of the blow-out opening is adjusted so that temperatures of at least two of the areas are different from each other.

Abstract: A light guide member includes three surfaces of a second surface, a fourth surface, and a fifth surface as two or more non-axisymmetric curved surfaces, and a projection lens includes a lens surface as a non-axisymmetric aspheric surface. With this, on the light guide member side, even when there is a shape constraint that the first surface or the third surface which is a surface contributing to light guide is a flat surface, and correction of asymmetric aberration is limited, it becomes possible to perform sufficient aberration correction as the whole of an optical system including the projection lens. Therefore, the virtual image display apparatus can have a wide viewing angle and high performance, and can be made small and lightweight.

Abstract: There are provided 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: An image display device includes a display unit that displays an image so as to be visually recognized by an observer, a holding member that holds the display unit and has at least a portion thereof exposed to the outside, and a heat conduction member, having a sheet shape, which is connected to the holding member. The display unit includes an image forming device that forms the image. The heat conduction member comes into contact with the image forming device so as to be capable of heat conduction, and transmits heat of the image forming device to the holding member.

Abstract: If a load of an indoor space is higher than a predetermined value in a cooling operation, a controller performs a swing control operation to swing a wind direction adjusting slat so that a direction of blown air shifts in a limited possible range. The angle of a lowermost wind direction relative to a horizontal plane in the limited possible range is smaller than the angle of a lowermost wind direction relative to the horizontal plane in the normal possible range. The normal possible range is previously determined to be a range where if the load of the indoor space is lower than the predetermined value, the direction of the blown air can shift upward and downward.

Abstract: First display elements and first ocular optical systems perform display in a first display region on a front side with respect to an observer, whereas second display elements and second ocular optical systems perform display in second display regions on peripheral sides with respect to the observer. Thus, a superimposed region of the display regions is provided in a position outside a central side of a person's visual field having an excellent information receiving capacity, and a wide angle of view is achieved while preventing the boundary from being visually identified. Further, the whole device is reduced in size and thickness by providing the plurality of display elements.

Abstract: An eyepiece optical system is configured to emit image light that is emitted from a plurality of display elements and corresponds to a plurality of areas being divided, to a position corresponding to an eye of an observer, wherein a first optical member of a complex type disposed at a position closest to an emitting side corresponding to at least two areas of the plurality of areas has a first optical surface on the emitting side, and the first optical surface is expressed by one curvature.

Abstract: An image display device includes a plurality of display elements configured to emit image light corresponding to a plurality of separate areas, and an ocular optical system configured to emit, to a position corresponding to an eye of an observer, the image light emitted from the plurality of display elements. The ocular optical system causes images to overlap with each other in a blending area including a boundary between the plurality of areas. An overlapping angle width in a direction orthogonal to the boundary of the blending area on a central visual field side is smaller than an overlapping angle width in the direction orthogonal to the boundary of the blending area on a peripheral visual field side.

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: 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 eyepiece optical system is configured to form a non-telecentric optical system together with an image display unit serving as an image element, and to include the pixels in which a pixel in a peripheral region and the like on an image display has a larger size than a pixel in a central region on the image display. Accordingly, the central region that supports a wide angle of view and is of the image display on the image element having an effective field of view with a good performance of information capacity, makes it possible to retain image formation with high resolution, and to prevent an image from being degraded in the peripheral region, thus making it possible to ensure high-quality visibility.