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: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.

Abstract: A virtual image display device has a light guide device in which the half mirror layer (the semi-transmissive reflecting film) of the light guide member is formed on the partial area of the first junction surface, and the second junction surface of the light transmitting member is bonded to the first junction surface in at least the exceptional area. Therefore, it is possible to increase the bonding strength of the first junction surface and the second junction surface, namely the strength of the light guide device composed of the light guide member and the light transmitting member combined with each other even in the case in which the attachment force of the half mirror layer (the semi-transmissive reflecting film) with respect to the first junction surface is not sufficiently strong.

Abstract: A display module of the present disclosure includes a display module main body and a housing. The display module main body includes a first, a second display element, and a prism. The housing includes a first, and a second frame. The first frame holds the first display element in a state in which the prism is positioned between a first and a second plate portion, and in which a third plate portion is in contact with the first display element and faces a first surface, and the second frame holds the second display element in a state in which the prism is positioned between a fourth and a fifth plate portion, and in which a sixth plate portion is in contact with the second display element and faces a second surface.

Abstract: A light-guiding device according to an aspect of the invention includes an incident section configured to make light incident, a light guide configured to guide the light incident from the incident section, a bonding layer configured to bond the incident section and the light guide, and a reflection member provided on a side surface of the bonding layer.

Abstract: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.

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: Provided are an imaging element configured to display an image, a projection optical system configured to project an image from the imaging element, and a two-stage structural diaphragm including a first diaphragm forming a first aperture portion in the projection optical system, and a second diaphragm forming a second aperture portion in the projection optical system, in which inclinations of a principal ray, relative to an image plane of an imaging element, of imaging light emitted from a peripheral portion of the image plane differ between in a first direction and in a second direction perpendicular to the first direction among in-plane directions of the image plane, in which the first diaphragm and the second diaphragm in the two-stage structural diaphragm are provided at different positions corresponding to differences between the inclinations of the principal ray in the first direction and in the second direction.

Abstract: A virtual image display device includes a video image element that displays an image, and a light-guiding member that guides video image light from the video image element by reflection and transmission at a plurality of light-guiding surfaces. Among the plurality of light-guiding surfaces, with respect to an incident-side light-guiding surface and an emission-side light-guiding surface that are adjacent to each other, and an opposing light-guiding surface that faces the incident-side light-guiding surface and the emission-side light-guiding surface, a thickness from the incident-side light-guiding surface to the opposing light-guiding surface is caused to be smaller than a thickness from the emission-side light-guiding surface to the opposing light-guiding surface.

Abstract: In a left and right pair of a first display device and a second display device that perform repositionable display, mutually different display contents can be visually recognized as a first video image and a second video image. Further, a display control portion controls the display content in accordance with at least one of the first video image and the second video image.

Abstract: In a first display device and a second display device of a display mechanism, a first video image and a second video image having mutually different display contents are visually recognized, and further, display positions of the first video image and the second video image can be changed by first and second posture adjustment mechanisms that are a posture adjustment mechanism.

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: A light-guiding device includes a pair of light-guiding portions, a pair of light-incident portions that causes image light to be incident on the pair of light-guiding portions respectively, and a pair of light-emitting portions that emit image light, guided by the pair of light-guiding portions, to outside respectively, in which a pair of optical members including the pair of light-guiding portions are coupled by a central member having light transmissivity, and separate overcoat layers are provided at the optical member on one side and at the optical member on another side with respect to an approximate center of the central member.

Abstract: A light-guiding device includes a pair of light-guiding portions, a pair of light-incident portions that causes image light to be incident on the respective pair of light-guiding portions, and a pair of light-emitting portion that causes image light guided by the respective pair of light-guiding portions to exit outside, in which a pair of optical members including the pair of light-guiding portions are coupled by a central member having light transmissivity, and in which the central member includes a light-guide blocking structure that suppresses light from being incident from one end to another end of the central member by absorbing the light.

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: 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.

Abstract: A head-mounted display apparatus according to the present disclosure includes an image generating module, a first deflecting element including a first deflecting portion configured to deflect, along a second optical axis intersecting the first optical axis, imaging light from the image generating module, and a second deflecting portion configured to deflect the imaging light along a third optical axis, a first diffraction element configured to diffract the imaging light from the second deflecting portion, and a second diffraction element configured to diffract the imaging light from the first diffraction element. A distance along the first optical axis between the image generating module and the first deflecting portion is longer than a distance along the third optical axis between the first diffraction element and the second deflecting portion.

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: It is assumed that some railway vehicles each include a control device and other railway vehicles include no control devices and that one or more control devices may be included in a train information. If only one control device is included in the train formation, there is no problem. However, if two or more control devices are included therein, it means that multiple control systems exist therein, so that it is necessary to determine a control system consistently. When a train is activated and started for operations or when railway vehicles are coupled together or divided, a management server, which has the smallest IP address value assigned, for example, by a DHCP and which exhibits the highest processing speed, controls, as a main management server, all of such systems. Even if any trouble occurs in a network or in a network device, the management system is automatically reconstituted.

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.