The present disclosure is related to reducing shake and vibration in Head-Up Displays (HUDs) under dynamic operating conditions. The apparatus includes a curved mirror for projecting an image from a display unit on a windshield of a vehicle. The curved mirror has damping tape on its nonreflective side to absorb vibrational energy and shift the first natural frequency of the curved mirror to a higher frequency. The damping tape includes at least a viscoelastic adhesive layer and a constraining layer. The method for stabilizing the HUD includes applying damping tape selected and positioned to reduce vibrational amplitude and shift the first natural frequency of the curved mirror to a higher frequency.

A display apparatus has a display to emit image-bearing light to a prism assembly that defines an optical path between an incident surface of the prism assembly and an output surface that is orthogonal to within +/−30 degrees relative to the incident surface, wherein the prism assembly has a curved reflective surface opposite the incident surface. The prism assembly encases a beam splitter at an oblique angle to the defined optical path and to both the incident and the output surface of the prism assembly. A shim, in contact against the display surface and against the incident surface of the prism assembly, defines a sealed air gap for light between the display surface and the incident surface. A frame houses the display, the shim, and the incident surface of the prism assembly, wherein the frame further provides connection features for coupling the apparatus to a head-worn article.

A vehicle instrument panel structure including: a head-up display device that is provided within an instrument panel positioned at a front section of a vehicle cabin and that displays information by projecting light onto a windshield; a defroster that is provided within the instrument panel so as to be disposed alongside the head-up display device in a vehicle width direction, and that conveys air toward the windshield; a guide section that is provided at an upper face of the instrument panel so as to be disposed between the head-up display device and the defroster, and that has a cross-section profile as sectioned along the vehicle width direction profiled so as to cause airflow from the defroster to cling to a surface of the guide section such that the airflow is blown toward an area of the windshield in which information is displayed by the head-up display device.

A mirror device includes: a mirror including a rotation shaft pivotably supported, a coupling shaft separated from the rotation shaft, and a reflecting surface that reflects display light; a coupling member including a first coupling portion coupled to the rotation shaft and a second coupling portion coupled to the coupling shaft, and configured to pivot integrally with the mirror; a motor that is connected to the coupling member via a gear and that pivots the coupling member; and a first spring having one end side immovably fixed and another end side coupled to the coupling member, and configured to apply force to the coupling member in one rotation direction.

Method for taking a test using a smartphone including placing the smartphone into connection with a device, placing the device on a head of a person with the smartphone in a position in which a display of the smartphone is visible to the person, coupling the smartphone to the device and displaying test questions on the display. Cheating is detected by, for example, monitoring presence of the device on the head of the person by periodically obtaining biometric data from the person and analyzing a change in the biometric data relative to previously obtained biometric data for the person, and when a change is present, stopping display of the test questions and generating and transmitting a communication to a test-providing institution derived from the change in biometric data.

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.

A head-up display includes a picture generation unit configured to project image light, a hexagonal optical reflection element arranged on a light path of the image light and including a hollow hexagonal cylinder, a concave mirror and an image display plate. The hollow hexagonal cylinder has a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, a fifth sidewall and a sixth sidewall which are sequentially connected to form a closed hexagonal column. The second sidewall is transparent, and the first sidewall and the fifth sidewall opposite to the second sidewall are configured to reflect the image light. The concave mirror is disposed on the light path of the image light and configured to receive the image light reflected from the hollow hexagonal cylinder. The image display plate is configured to receive image light reflected from the concave mirror.

A handheld wireless display device, having at least SVGA-type resolution, includes a wireless interface, such as Bluetooth™, WiFi™, Wimax™, cellular or satellite, to allow the device to utilize a number of different hosts, such as a cell phone, personal computer, media player. The display may be monocular or binocular. Input mechanisms, such as switches, scroll wheels, touch pads, allow selection and navigation of menus, playing media files, setting volume and screen brightness/contrast, activating host remote controls or performing other commands. The device may include MIM diodes, Hall effect sensors, or other position transducers and/or accelerometers to detect lateral movements along and rotational gestures around the X, Y and Z axes as gesture inputs and movement queues. These commands may change pages, scroll up, down or across an enlarged screen image, such as for web browsing. An embedded software driver (e.g., Microsoft Windows SideShow™) permits replicating a high-resolution screen display from a host PC. The device may repeatedly poll the host at intervals for updated content even when the host is powered off, asleep or hibernating, and may return the host to its previous power state.

A system and method for detecting a condition of an augmented reality system and/or controlling an aspect of the augmented reality system.

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.