Abstract:
A holographic display apparatus includes a spatial light modulator configured to generate hologram patterns to modulate light; an illuminator configured to emit the light to the spatial light modulator; and a controller configured to control operations of the spatial light modulator and the illuminator, the spatial light modulator being configured to generate, from among the hologram patterns, a first hologram pattern and a second hologram pattern according to the control operations of the controller, the first hologram pattern and the second hologram pattern being configured to form a first hologram image and a second hologram image having different viewpoints, and the controller being configured to set a first phase modulation value of the first hologram pattern and a second phase modulation value of the second hologram pattern to be different from each other such that hologram images having different viewpoints are formed.
Abstract:
Provided are display apparatuses and electronic apparatuses that include the display apparatuses. The display apparatus may include an optical system that transfers a first image and a second image to an ocular organ of a user. The optical system may include at least two polarization-dependent lenses. Each of the two polarization-dependent lenses may have a focal length that varies based on a polarization state of incident light. The two polarization-dependent lenses may have optically different characteristics with respect to the first and second images. The display apparatus may further include at least one wave plate and/or at least one polarizer provided between the two polarization-dependent lenses or outside thereof.
Abstract:
Provided is a backlight unit having high optical efficiency and a holographic display device including the backlight unit. The backlight unit includes a light source unit configured to provide a light beam, a first beam expander configured to mix the light beam provided from the light source unit, expand the light beam in a first direction, and output the mixed and expanded light beam as white light, and a second beam expander configured to expand the white light output from the first beam expander in a second direction perpendicular to the first direction and output the expanded white light as surface light.
Abstract:
Provided are a backlight unit and a holographic display apparatus including the same. The backlight unit includes a light guide plate; an input coupler configured to guide light into the light guide plate; a light deflector configured to deflect light emitted from the input coupler and guide the deflected light to propagate within the light guide plate. The light deflector is disposed on a region of the light guide plate which does not overlap with an optical path of light incident on the input coupler. The backlight unit also includes an output coupler configured to emit the light, having been propagated within the light guide plate, to an outside of the light guide plate.
Abstract:
A see-through type display apparatus includes a spatial light modulator configured to time-sequentially output a multi-layered two-dimensional (2D) image, a depth generator configured to generate a multi-layered depth image having pieces of different depth information from the multi-layered 2D image based on a focal distance that is a distance between the depth generator and a focus point of the multi-layered 2D image; and a light path change member configured to change at least one of a first transmission path of light corresponding to the multi-layered depth image and a second transmission path of external light corresponding to an external image, to thereby transmit the multi-layered depth image and the external image to a same area.
Abstract:
A mirror display includes a light source, a light guide plate configured to guide light emitted from the light source, a first electrode layer spaced apart from the light guide plate and including at least one first hole, a first spacer provided between the light guide plate and the first electrode layer, a second electrode layer spaced apart from the first electrode layer and including at least one second hole not facing the first hole, and a substrate provided on the second electrode layer.
Abstract:
A method of forming a light modulating signal for displaying a 3D includes preparing a plurality of data sets for 2D image data with different viewpoints; imposing a phase value the plurality of data sets, by which each of the 2D images is seen at a corresponding viewpoint; and superposing the 2D images.
Abstract:
A holographic display apparatus includes a spatial light modulator configured to generate hologram patterns to modulate light; an illuminator configured to emit the light to the spatial light modulator; and a controller configured to control operations of the spatial light modulator and the illuminator, the spatial light modulator being configured to generate, from among the hologram patterns, a first hologram pattern and a second hologram pattern according to the control operations of the controller, the first hologram pattern and the second hologram pattern being configured to form a first hologram image and a second hologram image having different viewpoints, and the controller being configured to set a first phase modulation value of the first hologram pattern and a second phase modulation value of the second hologram pattern to be different from each other such that hologram images having different viewpoints are formed.
Abstract:
Provided are an apparatus and a method for displaying a holographic three-dimensional (3D) image. The apparatus includes an image segmenter configured to segment an original image into a plurality of segments, and a calculator configured to calculate diffraction fringe pattern information for displaying each of the plurality of segments as a 3D holographic image. The image segmenter adjusts the number of the plurality of segments.
Abstract:
Provided are a backlight unit and a holographic display including the same. The backlight unit may include: a light guide plate; a light source unit configured to adjust a direction of light which is emitted from the light source unit and incident on the light guide plate; and a diffraction device which is disposed on the light guide plate and configured to control a direction of light emitted from the light guide plate.