A light control film includes a plurality of spaced apart substantially parallel first light absorbing regions arranged along a first direction, each first light absorbing region having a width and a height, the plurality of first light absorbing regions including nonoverlapping first and second sub-pluralities of the plurality of first light absorbing regions, the first sub-plurality of the plurality of first light absorbing regions having a first viewing angle, the second sub-plurality of the plurality of first light absorbing regions having a different second viewing angle.

A display system for imaging a user body portion includes a display panel, an optical sensor disposed on the display panel and configured to detect light reflected by the user body portion, and an optical stack disposed between the display panel and the optical sensor. The optical stack includes a first optical reflector and a light collimating film. The light collimating film includes a plurality of substantially coplanar alternating first and second regions. For an incident light, a visible wavelength range, and an infrared wavelength range, and for each of a first incident angle of less than about 5 degrees and a second incident angle of between about 40 degrees and about 70 degrees, the plurality of polymeric layers has an average optical reflectance of greater than about 70% in the visible wavelength range and an optical transmittance of greater than about 30% in the infrared wavelength range.

A medical apparatus is described for providing visualization of a surgical site. The medical apparatus includes an electronic display disposed within a display housing, the electronic display configured to produce a two-dimensional image. The medical apparatus includes a display optical system disposed within the display housing, the display optical system comprising a plurality of lens elements disposed along an optical path. The display optical system is configured to receive the two-dimensional image from the electronic display, produce a beam with a cross-section that remains substantially constant along the optical path, and produce a collimated beam exiting the opening in the display housing. The medical apparatus can also include an auxiliary video camera configured to provide an oblique view of a patient on the electronic display without requiring a surgeon to adjust their viewing angle through oculars viewing the electronic display.

Head-mounted display systems and methods of operation that allow users to couple and decouple a portable electronic device such as a handheld portable electronic device with a separate head-mounted device (e.g., temporarily integrates the separate devices into a single unit) are disclosed. The portable electronic may be physically coupled to the head-mounted device such that the portable electronic device can be worn on the user's head. The portable electronic device may be operatively coupled to the head-mounted device such that the portable electronic device and head mounted device can communicate and operate with one another. Each device may be allowed to extend its features and/or services to the other device for the purpose of enhancing, increasing and/or eliminating redundant functions between the head-mounted device and the portable electronic device.

The invention relates to a display device for representing three-dimensional scenes. The display device comprises at least one illumination device, at least one spatial light modulation device and at least one Bragg polarization grating. The Bragg polarization grating comprises at least one birefringent layer, incident light being deflectable at a deflection angle of at least 20.

A surgical retractor includes a plurality of cameras integrated therein. One such retractor includes a tubular retractor and an insert supporting said plurality of cameras can be disposed within a tubular retractor.

The present disclosure provides a display device and a vehicle, and relate to the field of display technologies. When the present disclosure is applied to a vehicle, a driver and a passenger may see different images, and thus user experience is enhanced. A display device includes: a display panel and a light adjusting structure arranged at a light exiting side of the display panel. The light adjusting structure is configured to adjust a direction of exit light from the display panel, such that first images displayed by all first display units in the display panel and second images displayed by all second display units in the display panel are respectively transmitted to a first visible area and a second visible area.

Head-mounted display systems and methods of operation that allow users to couple and decouple a portable electronic device such as a handheld portable electronic device with a separate head-mounted device (e.g., temporarily integrates the separate devices into a single unit) are disclosed. The portable electronic may be physically coupled to the head-mounted device such that the portable electronic device can be worn on the user's head. The portable electronic device may be operatively coupled to the head-mounted device such that the portable electronic device and head mounted device can communicate and operate with one another. Each device may be allowed to extend its features and/or services to the other device for the purpose of enhancing, increasing and/or eliminating redundant functions between the head-mounted device and the portable electronic device.

Systems and methods configured to provide views of a virtual space are presented herein. A display device may include a display screen, one or more sensors, and/or other component. The one or more sensors being configured to generate output signals conveying gaze information including one or more of a viewpoint, a gaze direction, and/or other information. An instance of a virtual space may be executed to determine a view of the virtual space based on the gaze information and/or other information. The view of the virtual space may correspond to a field of view within the virtual space determined based on the gaze information. The instance of the virtual space may be presented on the display screen according to the determined view of the virtual space.

There is provided an imaging device, the imaging device including: a support structure configured to be mountable on a head of a user; an optical filter having a reflection surface that reflects predetermined light having a predetermined wavelength band and allows visible light to pass; and at least one first imaging unit configured to acquire a first image including at least a part of a face of the user on the basis of the predetermined light reflected by the reflection surface.