A virtual image display device displays a virtual image by projecting a display light of an image toward a projection unit, and includes: a display unit configured to emit the display light; and a diffraction reflection element configured to reflect the display light emitted from the display unit by diffraction. The diffraction reflection element has a plate shape along a horizontal plane. The diffraction reflection element is configured to emit the display light toward the projection unit arranged above the diffraction reflection element when the display light is incident, and is set such that an angle of incidence on the diffraction reflection element is larger than an angle of emission from the diffraction reflection element.

Provided are an electronic device and an operating method thereof. The electronic device includes a display, a plurality of optical sensor units arranged to respectively correspond to a plurality of regions divided on the display, a memory storing one or more instructions, and a processor configured to execute the one or more instructions stored in the memory, in which the processor is further configured to, by executing the one or more instructions, determine an intensity and a direction of external light incident to each of the plurality of regions divided on the display, by using the plurality of optical sensor units, determine a shadow region on the display, based on the determined intensity and direction of the external light corresponding to each of the plurality of regions, and control the display to provide a shadow effect on the determined shadow region, overlappingly with an image that is currently displayed on the display.

An electronic device comprises a housing, an electronic unit attached to the housing, a fixing section provided to the housing and including a first hook that holds the electronic unit relative to the housing, and movement restricting section arranged relative to the first hook to restrict movement of the first hook.

A bracket and mount apparatus connects to a fixed touchscreen display of a Tesla vehicle allowing the same to rotate and/or tilt for placement where desired for viewing by either or both of a driver and a passenger thereof. Methods of using the same are further provided.

A bracket and mount apparatus connects to a fixed touchscreen display of a Tesla vehicle allowing the same to rotate and/or tilt for placement where desired for viewing by either or both of a driver and a passenger thereof. Methods of using the same are further provided.

A backlight comprises a light guide plate and a light emitting element. The light guide plate has a first main surface, a second main surface opposite the first main surface, and a side surface connecting the first main surface and the second main surface, the side surface having a first region and a second region different from the first region. The light emitting element emits light toward the first region of the side surface of the light guide plate. The side surface of the light guide plate includes, in the second region of the side surface of the light guide plate, a first inclined surface that extends from an outer edge of the first main surface in an inclined manner and has an inclination angle between 52° and 83° with respect to the first main surface.

An image inspection device includes a mounting unit on which an image projection device that directly projects an image on a retina of a user is to be mounted; a condensing lens that condenses a light beam emitted from the image projection device mounted on the mounting unit; a detector on which an inspection image is projected and detected; and a controller that inspects the inspection image detected by the detector. The image inspection device inspects the image projected by the image projection device, which directly projects the image on the retina of the user.

A display device and a speaker assembly are provided, the speaker assembly is located in a first rear housing or a second rear housing and includes a shell, a first speaker unit and a second speaker unit, the shell has a cavity, the cavity has a baffle disposed therein, the cavity is divided into a first cavity and a second cavity by the baffle, the first speaker unit and the second speaker unit are respectively located in the first cavity and the second cavity, and the speaker has a relatively low degree of distortion and a relatively high reliability.

Disclosed are a multimedia device including a flexible display and controlling method thereof. The present invention includes a guide bar, a flexible display configured to be rolled up on an outer circumference of the guide bar, the flexible display having a first region rolled up on the outer circumference of the guide bar and a second region not rolled up on the outer circumference of the guide bar, a receiving unit configured to receive a content and metadata corresponding to the content from a source device, and a control unit adjusting a vertical width of the second region of the flexible display in accordance with a preset condition.

Disclosed are a multimedia device including a flexible display and controlling method thereof. The present invention includes a guide bar, a flexible display configured to be rolled up on an outer circumference of the guide bar, the flexible display having a first region rolled up on the outer circumference of the guide bar and a second region not rolled up on the outer circumference of the guide bar, a receiving unit configured to receive a content and metadata corresponding to the content from a source device, and a control unit adjusting a vertical width of the second region of the flexible display in accordance with a preset condition.