Abstract: A limiting part limits displacement of an optical member partially fixed to a frame unit, and excessive stress applied on the optical member and deformation of the optical member may be prevented. That is, support strength of the optical member may be improved by supplementarily using the limiting part. Note that the optical member is partially fixed to the frame unit, and fastening parts and the number of parts are reduced and downsizing becomes easier and reduction in weight of the virtual image display device is easier. Further, the optical member is partially fixed to the frame unit, and thus, even when there is a difference in coefficient of thermal expansion between the optical member and the frame unit, the expansion or the like of the optical member with respect to the frame unit is allowed and distortion, deformation, breakage of the optical member may be prevented more reliably.

Abstract: A virtual image display device including a video element, an optical member, a frame section, and an auxiliary mounting member. The optical member is adapted to direct light from the video element toward an eye of an observer to make an image be recognized. The frame section is adapted to support the video element and the optical member so that the optical member is disposed in front of the eye of the observer, the frame section including a connection section having a recessed section. The auxiliary mounting member is fixed to the connection section at the recessed section so as to be disposed on the observer side of the optical member.

Abstract: During the manufacturing of the light guide device (20), the first and second bonding ribs (R1,R2) are used such that the light guide prism (10) and the opposing prism (50) are connected with each other from a specific offset direction. In this case, a difference between sizes of clearances between the first bonding surface (AS) and the second bonding surface (BS) caused by a difference in inclination angles of the offset direction with respect to the first bonding surface is used such that a flow direction of the adhesive is controlled and filling is performed in a desire state, and thus high accuracy of the joint formed by the adhesive is maintained.

Abstract: In a virtual image display device, since the frame section has the support section for detachably fixing the auxiliary mounting member, which is disposed adjacent to the optical members, on the observer side of the optical members, by providing a variety of functions such as an optical function to the auxiliary mounting member, the usefulness of the virtual image display device can be enhanced. Specifically, in the case of, for example, providing the auxiliary mounting member with a diopter correction function, it is possible for any observers with a variety of levels of vision to observe the image obtained by the video display element in a good condition without blur without using eyeglasses.

Abstract: By arranging cables, which transmit video signals to a pair of video image display elements arranged on the right side and the left side, along a frame for supporting a pair of right and left light guiding devices, it is possible to concentrate the cables on one of the right and left sides. That is, it is possible to integrally form the cables. By accommodating the cables in a cable cover portion, which extends along the frame, in a cover inside, it is possible to suppress an increase in size which accompanies cable arrangement and to implement the apparatus as a whole in a small body.

Abstract: A virtual image display apparatus includes a video image display element which generates video image light and a light guiding member which includes a plurality of optical surfaces and guides the video image light by reflecting on an inner surface side. The light guiding member is a block-shaped member including, as a plurality of optical surfaces, a pair of facing planes which extend substantially in parallel with each other and fully reflect the video image. The light guiding member includes a pair of side portions interposing the pair of facing planes in a direction vertical to a light guiding direction. At least one side portion of the pair of side portions couples the pair of facing planes by a flat plane including a tapered surface which is adjacent to the one plane of the pair of facing planes and forms an obtuse angle.

Abstract: A virtual image display apparatus includes a video image display element which generates video image light, a light guiding member which includes a plurality of optical surfaces and guides the video image light by reflecting on inner surface side, and an optical device portion such as a projector lens through which the video image light passes when the video image light is made to foe incident on the light guiding member. Here, the light guiding member is a block-shaped member including a pair of facing first and third surfaces which extend substantially in parallel with each other and fully reflect the video image light, and first reference optical axis of the optical device portion on a light emitting side extends in a direction in which the first reference optical axis forms an obtuse angle with respect to a traverse reference axis corresponding to an eye alignment direction.

Abstract: In relation to a fourth surface as a partially covered optical surface from among a plurality of optical surfaces which configure a light guiding member in a light guiding device, such as a first surface, an intermediate image is formed at a location separated from the partially covered optical surface (fourth surface). With such a configuration, it is possible to reduce the influence of dirt, contamination, or the like on an image even if the dirt, the contamination, or the like are generated on the partially covered optical surface (fourth surface), from which it is difficult or impossible to remove the dirt, the contamination, or the like, and to display an image with a wide image angle by a configuration forming an intermediate image.

Abstract: A light guide section is directly fixed to a frame via an attachment portion that is part of a peripheral portion of the light guide section, whereby not only can the light guide section be readily fixed and the weight of a virtual image display apparatus can be readily reduced but also the strength at which the frame supports the light guide section is improved. Further, except the attachment portion, the remaining peripheral portion of the light guide section is not fixed to the frame. Therefore, when the light guide section and the frame differ from each other in terms of the coefficient of thermal expansion, the light guide section is allowed to expand with respect to the frame, whereby no distortion, deformation, or breakage of the light guide section will occur.

Abstract: An observer can observe a video in a state in which the visual line of the observer is caused to overlook the downward side. In particular, in a virtual image display apparatus, even when the positions of the eyes, the nose, and the ears of the observer deviate from standard positions and the observer cannot observe a video in a targeted overlooking direction in a worn state in standard setting, it is possible to change an angle in an overlooking direction with respect to a front direction and cause the observer to perform observation in a suitable visual line by changing, with a nose receiving section functioning as an adjusting section, the posture of the virtual image display apparatus and adjusting an emission state of video light from a light guide member according to individual differences of the observer.

Abstract: An optical unit housing section and a light guide device are supported by a frame. Durability of sections having an optical function in an entire apparatus is maintained. The frame is arranged on a side closer to the nose of an observer than the optical unit housing section and reduced in size. Consequently, a virtual image display apparatus can give an impression that the virtual image display apparatus is small in size in appearance as a whole. Further, it is possible to attain a reduction in the weight of the entire virtual image forming apparatus. Compared with a structure in which the entire apparatus is covered with a case-like member, the virtual image display apparatus can be formed in a shape closer to a form of eyeglasses. It is possible to attain design with apparent voluminousness suppressed.

Abstract: A rim portion or the like functioning as a boundary portion is arranged in a position corresponding to an interpupillary distance of an observer. Therefore, it is possible to cause a non-observer looking at the observer wearing a virtual image display apparatus from the outside to recognize that an outer frame portion is present in an appropriate position in terms of an eyeglass shape. It is possible to reduce a sense of discomfort given to the non-observer. Since the boundary portion is present in an appropriate position in terms of an eyeglass shape, a visual field same as a visual field obtained when the eyeglasses are worn is secured. Therefore, it is possible to sufficiently secure a visual field range for the observer in see-through.

Abstract: A virtual image display apparatus (head mounted display) that is worn around a head of a viewer and displays a virtual image includes a projection optical section that projects light that forms an image, a lens barrel that accommodates the projection optical section, a light-transmissive light guide member that causes the light from the projection optical section to be internally reflected and guided to an eye of the viewer to allow the viewer to visually recognize the image as a virtual image, and a blocking section that blocks a gap created between the light guide member and the lens barrel.

Abstract: In a virtual image display device, since the frame section has the support section for detachably fixing the auxiliary mounting member, which is disposed adjacent to the optical members, on the observer side of the optical members, by providing a variety of functions such as an optical function to the auxiliary mounting member, the usefulness of the virtual image display device can be enhanced. Specifically, in the case of, for example, providing the auxiliary mounting member with a diopter correction function, it is possible for any observers with a variety of levels of vision to observe the image obtained by the video display element in a good condition without blur without using eyeglasses.

Abstract: A limiting part limits displacement of an optical member partially fixed to a frame unit, and excessive stress applied on the optical member and deformation of the optical member may be prevented. That is, support strength of the optical member may be improved by supplementarily using the limiting part. Note that the optical member is partially fixed to the frame unit, and fastening parts and the number of parts are reduced and downsizing becomes easier and reduction in weight of the virtual image display device is easier. Further, the optical member is partially fixed to the frame unit, and thus, even when there is a difference in coefficient of thermal expansion between the optical member and the frame unit, the expansion or the like of the optical member with respect to the frame unit is allowed and distortion, deformation, breakage of the optical member may be prevented more reliably.

Abstract: According to a light guide device that is an optical member, since a protruding rib extending along a sideways end portion is provided, first and second surfaces including a first surface and other free-form surfaces can be aligned with another member that forms, for example, a virtual image display apparatus with high precision when the light guide device is assembled to the other member by using part of the protruding rib, which is provided separately from the first and second surfaces, as a reference, whereby an optical function of the light guide device in the virtual image display apparatus or any other apparatus can be ensured. Further, an optical main body provided with the first and second surfaces has a shape similar to that of glasses and hence has a good external appearance.

Abstract: A light guide section is directly fixed to a frame via an attachment portion that is part of a peripheral portion of the light guide section, whereby not only can the light guide section be readily fixed and the weight of a virtual image display apparatus can be readily reduced but also the strength at which the frame supports the light guide section is improved. Further, except the attachment portion, the remaining peripheral portion of the light guide section is not fixed to the frame. Therefore, when the light guide section and the frame differ from each other in terms of the coefficient of thermal expansion, the light guide section is allowed to expand with respect to the frame, whereby no distortion, deformation, or breakage of the light guide section will occur.