Provided is a multifunctional display device or a multifunctional electronic device. Provided is a display device or electronic device with high visibility. Provided is a display device or electronic device with low power consumption. The electronic device includes a housing, a display device, a system unit, a camera, a secondary battery, a reflective surface, and a wearing tool. The system unit and the secondary battery are each positioned inside the housing. The system unit includes a charging circuit unit. The charging circuit unit is configured to control charging of the secondary battery. The system unit is configured to perform first processing based on imaging data of the camera. The first processing includes at least one of gesture operation, head tracking, and eye tracking. The system unit is configured to generate image data based on the first processing. The display device is configured to display the image data.

A see-through display device includes an image generation unit configured to emit a virtual image light, a light combining unit configured to combine the virtual image light with an actual image light, and a driving unit including a deformation unit and a bridge unit disposed between the deformation unit and the image generation unit, and configured to control a distance between the image generation unit and the light combining unit through the deformation unit and the bridge unit.

Disclosed are a head-up display for a vehicle and a method of controlling the same. The head-up display may include a casing unit, a hinge unit rotatably mounted on the casing unit, a holder unit mounted on the hinge unit, wherein a combiner is positioned on the holder unit, an actuation unit coupled to the hinge unit and configured to rotate the hinge unit, a detection unit configured to detect an initial location of the hinge unit, and a controller configured to receive a detection signal of the detection unit and drive the actuation unit. Accordingly, precise control of the combiner may be possible although only the initial location of the hinge unit is detected.

A wearable image display device includes: a wearing member worn on a head of a user; a supporting member configured to support a display device that displays video; a coupling member that is coupled to the wearing member and the supporting member and that is configured to move the display device and the like from a first position enabling the user to visually recognize the video to a second position; and a control device configured to control an output of sound output from a speaker disposed at the supporting member. The control device makes the sound output from the speaker when the display device and the like are located in the second position louder than the sound output from the speaker when the display device and the like are located in the first position.

Eyewear including a support structure defining a region for receiving a head of a user. The support structure supports optical elements, electronic components, and a use detector. The use detector is coupled to the electronic components and is positioned to identify when the head of the user is within the region defined by the support structure. The electronic components monitor the use detector and transition from a first mode of operation to a second mode of operation when the use detector senses the head of the user in the region.

A virtual image optical system with which a virtual image is formed by introducing light from a display surface to a pupil includes a first reflective surface arranged to reflect the light from the display surface, and a second reflective surface arranged to reflect light from the first reflective surface. An optical path length from the display surface to the second reflective surface is changeable with movement of the first reflective surface, a position of the pupil is changeable with rotation of the second reflective surface in a direction having a component in a direction perpendicular to an optical path of a principal ray incident on the pupil, and an angle formed between a moving direction of the first reflective surface and the principal ray incident on the first reflective surface is 5° or less.

An optical see-through glass type display device comprises: an image projector projecting a virtual image; a first optical element configured to guide light of the virtual image; and a second optical element having a first reflection surface for reflecting back light coming through the front surface of the second optical element and a second reflection surface for retro-reflecting light coming through the rear surface of the second optical element. The second optical element is switchable between a first state in which the reflection on the first and second reflection surfaces is enabled and a second state in which the reflection on the first and second reflection surfaces is disabled.

A vehicle, a head-up displaying system and a method for adjusting a height of a projection image thereof are provided. The system includes a projector, a camera, a seat detecting module and a head-up controller. The camera is configured to detect an image having locations of the eyes of the driver and a predetermined reference point. The seat detecting module is configured to detect a position of a seat of the driver in the vehicle so as to obtain an actual horizontal distance between the eyes of the driver and the predetermined reference point. The head-up controller is configured to adjust a height of the projection image projected by the projector automatically according to the actual vertical distance. The system automatically controls the height of the projection image, and the projection image may be comfortable for the driver to view without any manual intervenes.

A heads up display system with a variable focal plane includes a projection device to generate light representative of at least one virtual graphic, an imaging matrix to project the light representative of the at least one virtual graphic on at least one image plane, a display device to display the at least one virtual graphic on the at least one image plane, and a translation device to dynamically change a position of the imaging matrix relative to the display device based, at least in part, on a predetermined operational parameter to dynamically vary a focal distance between the display device and the at least one image plane.

In order to enrich the time taken in transition between deactivated state and activated state, a head-up display device according to the present invention is provided with: a projected member; a display means that emits display light; a reflecting mirror for reflecting the display light; a drive means for changing the angle of reflection of the display light by rotating the reflecting mirror; and a control means for, by controlling the drive means and the display means, causing the display light reflected by the reflecting mirror to irradiate the projected member so as to cause a vehicle passenger to visually recognize a virtual image via the projected member. The control means, at the time of transition between deactivated state and activated state, changes the manner of display of the display means 3 in accordance with the position of the reflecting mirror when causing the mirror to be moved from one to the other between a first position corresponding to the deactivated state and a second position corresponding to the activated state.