A diaphragm for performing image position correction of a virtual image projectable onto a windshield of a vehicle by a head-up display. A first positioning mark, a second positioning mark, and a calibration mark are attached to a disk of the diaphragm. The disk is transparent at least in the region of the first positioning mark, the second positioning mark, and the calibration mark, so that a first image including the first positioning mark and a first positioning pattern recorded directly through the disk and output on the vehicle side, a second image including the second positioning mark and a second positioning pattern output on the vehicle side, mirrored by a mirror of the diaphragm and recorded through the disk.

There is provided a head-up display device including: a display configured to emit a display light ray therefrom, a reflection member configured to pivot around a rotation axis and reflect the display light ray to project a display image; and a housing configured to accommodate the reflection member. The reflection member has a plurality of ribs protruding from a surface on an opposite side to a reflection surface which reflects the display light ray, and the plurality of ribs have a portion in which a height on an outer side in a rotational direction centered at the rotation axis is lower than that on an inner side in the rotational direction.

Video sources and inertial sensors are attached to a weapon and to goggles. A computer receives video images from the weapon- and goggles-mounted sources and inertial data from the sensors. The computer calculates a location for an image from the weapon-mounted source within an image from the goggles-mounted source using the inertial sensor data. The sensor-based location is checked (and possibly adjusted) based on a comparison of the images. A database contains information about real-world objects in a field of view of the goggles-mounted source, and is used to generate icons or other graphics concerning such objects.

Embodiments include a head-worn display including a display panel sized and positioned to produce a field of view to present digital content to an eye of a user, and a processor adapted to present the digital content to the display panel such that the digital content is only presented in a portion of the field of view, the portion being in the middle of the field of view such that horizontally opposing edges of the field of view are blank areas. The processor is adapted to shift the digital content into one of the blank areas to adjust the convergence distance of the digital content and thereby change the perceived distance from the user to the digital content.

A projection display device includes a display device, an optical system, and a shielding plate. The optical system includes a first mirror and a second mirror provided on the regular optical path, the second mirrors being to provide an optical path convergence point on the regular optical path, and the first mirrors being provided at a position corresponding to the optical path convergence point. The projection display device is configured such that a position of a mirror surface of the first mirror and the second mirror is adjustable in accordance with a position of an eye point of a user so as to project the light toward the projection position that corresponds to the position of the eye point. The shielding plate is provided such that the shieling plate does not interfere with the regular optical path and such that the shielding plate interferes with the different optical path.

A wearable image display device includes a display unit that displays an image and a wearing unit attached to the display unit. The display unit includes a first positioning portion and a first rotation mechanism that rotates relative to the wearing unit in a rotational direction with a first direction serving as a rotation axis. The wearing unit includes a second positioning portion brought into contact with the first positioning portion and a first fitting mechanism fitted to the first rotation mechanism. The first positioning portion and the second positioning portion are brought into contact with each other either at a first position or at a second position different from the first position in the rotational direction.

An example device includes a heads up display (HUD) to guide light towards a user in a vehicle. The device includes a HUD housing with a base plane and a stationary mirror mount on the HUD base. The device includes an adjustable mirror mount on the HUD base and an attachment slot disposed in the HUD housing, the attachment slot to accept a mounting tab. The attachment slot is shaped to accept either one of a predominantly vertical mounting tab and a predominantly horizontal mounting tab. The predominantly vertical mounting tab includes a first portion that projects horizontally from a sidewall of the HUD. The first portion includes a first end inserted into the attachment slot and a second end opposite the first end. A second portion is coupled perpendicularly to the second end of the first portion. The second end extends parallel to the sidewall of the HUD.

An adjustment device includes a wearable electronic device and a case in which the wearable electronic device is disposed (e.g., seated). The wearable electronic device includes displays (e.g., display apparatuses) which display virtual images for a left eye and a right eye of a user, screen display portions which transmit light sources generated by the displays to the left eye and the right eye, and eye tracking cameras for the left eye and the right eye. The case includes a stator which fixes the wearable electronic device, and a focal lens which is disposed within an eye relief of the fixed wearable electronic device and forms each of images of the virtual images output from the screen display portions of the wearable electronic device on a portion of the case.

A head mountable display apparatus includes a display unit to display one or more images to a user wearing the HMD, a first optical element and a second optical element each configured to direct light from the one or more images displayed by the display unit for viewing by a respective eye of the user, a first input unit to receive user information for the user indicative of a separation of the user's eyes, a second input unit to receive a user input, and an adjustment unit to adjust a current separation of the first and second optical elements responsive to the user input, where the display unit is configured to display a first image comprising one or more indicators indicative of the current separation of the first and second optical elements with respect to the separation of the user's eyes.

According to at least one aspect, the present disclosure provides a head-up display device comprising: a housing including a receiving space within; a picture generation unit (PGU) disposed within the housing, for projecting an image related to vehicle driving information; one or more reflection members for reflecting an image projected from the PGU; a fixing member formed to be fixed to a vehicle body; and one or more length adjustment members coupled to the fixing member, for movably supporting the housing.