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.

Abstract: A display apparatus includes an image generation system that emits image light beams as non-parallel light beams, and a light guide system on which the image light beams emitted from the image generation system are incident without passing through a projection lens system. The light guide system includes a transparent light-incident portion that includes a light-incident surface on which the image light beams are incident and which is a curved surface, and a plurality of reflection surfaces which convert the image light beams incident from the light-incident surface into parallel light beams and are curved surfaces, and a transparent light guide portion of which one end side in a first direction is connected to the light-incident portion. In the light guide portion, the image light beams incident from the light-incident portion are reflected between a first surface and a second surface, and are guided to a light-emitting portion.

Abstract: A virtual image display apparatus includes a display device serving as an image forming unit, an image optical system including a first mirror member serving as an outer mirror member and receiving imaging light from the display device, and a partially reflecting type mirror portion reflecting imaging light emitted from the image optical system toward a position of an exit pupil. The first mirror member serving as the outer mirror member and the partially reflecting type mirror portion are integrated.

Abstract: A rechargeable battery protection circuit protects a rechargeable battery, using two NMOS transistors inserted in series in a current path between a battery cathode and a positive terminal connected to load or power terminal of a charger. The protection circuit includes a booster circuit that generates a control voltage, using input capacitances of the NMOS transistors having gates connected to charge and discharge control terminals, respectively. A driving circuit sets the output state of the control terminals to a high level, by supplying the control voltage to the control terminals, a detection circuit detects a battery state and outputs a detection state, and a control circuit operates the driving circuit based on the detection state, so that the output state of the control terminals is selected by the driving circuit to at least one of three states including a high level, a low level, and a high-impedance state.

Abstract: A see-through display apparatus includes an image display apparatus configured to emit a video light, a light guide apparatus configured to guide the video light and to output the video light in a first direction, and a light control shade disposed opposite to the first direction with respect to the light guide apparatus. The light control shade is configured to control a transmittance of an outside light based on a luminance of the outside light. A first response time of the light control shade when the outside light changes from a lower luminance to a higher luminance is slower than a second response time of the light control shade when the outside light changes from the higher luminance to the lower luminance.

Abstract: A light guide device used in a display apparatus includes a transparent light guide portion that guides light beams incident from one end side to a light-emitting portion. The light guide portion includes a plurality of partial reflection surfaces between a first surface and a second surface which are parallel to each other, the plurality of partial reflection surfaces being inclined at the same angle from a normal direction with respect to the second surface toward the one end side. In the plurality of partial reflection surfaces, an appropriate incident angle range of the partial reflection surface positioned on the one end side is set to a larger angle than that of the partial reflection surface positioned on another end side.

Abstract: A virtual image display device includes a display light guiding unit, and an image forming unit that emits image light to the display light guiding unit, the display light guiding unit includes a first light guiding unit that guides image light corresponding to a first angle of view, and a second light guiding unit that guides image light corresponding to a second angle of view, among angles of view of image light emitted from the image forming unit, and the first light guiding unit and the second light guiding unit respectively include incident side diffraction elements that take the image light beams into the inside, and emission side diffraction elements that emit the image light beams to the outside.

Abstract: A virtual image display device includes an image element configured to display an image, a first lens disposed in an extraction position of image light and including at the image element side thereof a convex surface, a second lens disposed further toward the image element side than the first lens and including a concave surface bonded to the convex surface of the first lens, a half mirror provided in a bonding portion for bonding together the convex surface and the concave surface, a transmission/reflection selection member provided at a light emitting side of the first lens and configured to selectively perform transmission or reflection of the light depending on a polarization state of the light, and a light-guiding portion keeping close contact between the image element and the second lens and configured to guide the image light.

Abstract: A virtual image display device includes an image element configured to display an image, a first optical unit disposed at a position where image light is extracted, a second optical unit disposed at the image element side with respect to the first optical unit, a half mirror provided on a serrated surface formed at a bonding portion between the first optical unit and the second optical unit, and a transmission/reflection selection member that is provided at a light emitting side of the first optical unit and that is configured to selectively transmit or reflect light depending on a polarization state of the light.

Abstract: A virtual image display apparatus includes a display device (image forming unit), a lens configured to refract imaging light from the display device, a first mirror member configured to reflect imaging light that passed through the lens, a second mirror member configured to reflect the imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect the imaging light reflected by the second mirror member toward a position of an exit pupil. The lens is asymmetric with respect to an optical axis in a first direction corresponding to an eccentric direction defined by the first mirror member and the second mirror member, and is symmetric, across the optical axis, with respect to a second direction orthogonal to the first direction.

Abstract: A virtual image display apparatus includes a display device (image forming unit), a first mirror member configured to reflect imaging light from the display device, a second mirror member configured to reflect imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect imaging light reflected by the second mirror member toward a position of an exit pupil. One of the first mirror member and the second mirror member is a refractive reflective optical member that includes a refractive member including a refractive surface, and a mirror surface formed at a non-refractive surface of the refractive member.

Abstract: A virtual image display apparatus includes a display device (image forming unit), a lens configured to refract imaging light from the display device, a first mirror member configured to reflect imaging light that passed through the lens, a second mirror member being a refractive reflective optical member configured to reflect the imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect the imaging light reflected by the second mirror member toward a position of an exit pupil. The refractive reflective optical member includes, across a refractive member, a refractive surface and a mirror surface. The lens and the refractive reflective optical member are integrated as a composite member.

Abstract: A display device of the invention includes: an image generation part configured to generate image light; a light guide being configured to guide the image light; and an emitting part configured to cause the image light to emit from the light guide toward an exit pupil, in which the emitting part includes a plurality of half mirrors which are disposed parallel to one another at an interval, each of the plurality of half mirrors being configured to reflect a part of the image light and cause another part of the image light to pass through the half mirror, and in at least one half mirror of the plurality of half mirrors, when Bmax represents a maximum luminance, Bmin represents a minimum luminance, and a luminance ratio R (%) is defined as R=[(Bmax?Bmin)/Bmax]×100, R?30 is satisfied.

Abstract: A head-mounted display includes a display device, a projection optical member, a prism member, and a light condensing and reflecting surface. The prism member includes a first prism, and a second prism that is disposed further toward an exit pupil side than the first prism. The first prism includes an incident surface, a reflection surface that totally reflects the image light, and a first joining surface that is joined with the second prism via a semi-transmissive reflection surface. The second prism includes a second joining surface that is joined with the first joining surface, and an opposing flat surface that is disposed parallel to the reflection surface to face the reflection surface and configured to transmit the image light, reflected by the semi-transmissive reflection surface and then by the light condensing and reflecting surface and thereafter passing through the semi-transmissive reflection surface.

Abstract: A head-mounted display includes a display device, a projection optical member, and a prism member. The prism member includes a first prism receiving image light from the projection optical member, and a second prism disposed at a position further toward an exit pupil than the first prism. The first prism includes an entrance surface, a first reflection surface, and a first joining surface, the second prism includes a second joining surface joined to the first joining surface via a semi-transmissive reflection surface, a second reflection surface, and a light collecting reflection surface, and the semi-transmissive reflection surface is configured to reflect the image light, reflected by the light collecting reflection surface and then totally reflected by the second reflection surface, to pass through the second reflection surface.

Abstract: A virtual image display device includes a display light guiding unit, and an image forming unit that emits image light to the display light guiding unit, the display light guiding unit includes a first light guiding unit that guides image light corresponding to a first angle of view, and a second light guiding unit that guides image light corresponding to a second angle of view, among angles of view of image light emitted from the image forming unit, and the first light guiding unit and the second light guiding unit respectively include incident side diffraction elements that take the image light beams into the inside, and emission side diffraction elements that emit the image light beams to the outside.

Abstract: An information processing system, method for use with the system, information providing system, and method for use with the system, an information processing apparatus, method for use with the apparatus, a doll, an object, a program storage medium, and a program for authenticating users reliably are provided. A user acquires beforehand a doll called Pochara the Good Friend incorporating an IC chip that stores a user ID for authenticating the user. When the user mounts the doll on a platform connected to a personal computer, the user ID is read from the IC chip by a reader housed in the platform and transmitted over the Internet to a Pochara service server. The server has a Pochara database holding personal information about users of the service. The transmitted user ID is checked against the personal information in the database for authentication. This invention applies advantageously to servers offering services through networks.

Abstract: By configuring a micro structure portion, an image display device, and an eyepiece optical system to satisfy Expression (1), a diffusion effect of an appropriate extent can be imparted to image light with a relatively simple configuration, by taking into account the size of each of pixels constituting the image display device that is an image element, gaps between the pixels are made less noticeable, and a favorable state of visibility of an image can be obtained.

Abstract: A light guide system (light guide device) includes a transparent light guide portion that guides light beams incident from one end side to a light-emitting portion. The light guide portion includes a first surface, a second surface which is parallel to the first surface, and a third surface which is positioned between the first surface and the second surface on another end side. A plurality of obliquely-inclined partial reflection surfaces are disposed between the first surface and the second surface, and the third surface is inclined in the same direction as that of the partial reflection surface. The third surface is configured with an anti-reflection surface for image light beams traveling through the light guide portion, and is covered by an anti-reflection film, a light absorption layer, a moth-eye type roughened surface, or the like. Therefore, occurrence of stray light due to reflection by the third surface can be suppressed.