Samsung Electronics Co., Ltd.

Seoul National University

Myongji University Industry and Academia Cooperation

Seokil Moon

Changkun Lee

Hongseok Lee

Geeyoung Sung

Byoungho Lee

Bongsu Shin

Wontaek Seo

Sunil Kim

Daeho Yang

Dongheon Yoo

Jong-Young Hong

Jinsoo Jeong

Seungwoo Nam

Jongyoung Hong

Seunghoon Han

Jonghyun Kim

Sangeun Mun

Young-yoon Lee

Woojun Han

Jaisoon Kim

Chanhyung Yoo

Minseok Chae

Seunga Lim

A display device includes a display element configured to output light to display an image, a waveguide including a first surface to which the light is incident and a second surface opposite the first surface, an input coupler provided in the waveguide to input the light into the waveguide, a telecentric assembly configured to cause incident angles of light beams incident to the input coupler to be the same as each other, and an output coupler configured to output light propagating in the waveguide to outside of the waveguide.

Display device

A holographic display apparatus including a freeform curved surface and an operating method of the holographic display apparatus are provided. The holographic display apparatus includes: an image generator configured to generate a hologram image by modulating light; an optical system including a freeform curved surface for forming the hologram image generated by the image generator in a predetermined depth; and a processor configured to generate a computer-generated hologram (CGH) based on three-dimensional image information by using a phase map including information about an optical aberration with respect to the freeform curved surface and to control the image generator to modulate the light based on the CGH.

Holographic display apparatus including freeform curved surface and operating method thereof

An image processing method and apparatus include: obtaining a plurality of input optical images and a plurality of output optical images for a near-eye display apparatus; training a neural network for modeling the waveguide optical system by using a training set including the obtained input and output optical images; and obtaining a uniformity correction image to be input to the trained neural network such that the trained neural network then outputs a target uniformity image having certain brightness uniformity.

Image processing apparatus and method for processing image to be provided to near-eye display apparatus

Provided is a display apparatus including a combiner having asymmetric magnification. The display apparatus may include: an image forming device configured to form a virtual image; and a combiner configured to mix the virtual image with light containing an outside landscape and provide a viewer with the virtual image and the light that are mixed with each other, wherein the combiner may include a curved surface that varies a size of the virtual image with a first magnification in a first direction and a second magnification in a second direction perpendicular to the first direction, the second magnification being less than the first magnification.

Display apparatus including combiner having asymmetric magnification

A display apparatus includes a waveguide; an input coupler on the waveguide and configured to introduce light containing an image into the waveguide; and an output coupler on the waveguide and configured to output light traveling in the waveguide to the outside of the waveguide, wherein the output coupler includes a plurality of first diffraction grating elements arranged apart from each other and configured to diffract a first light portion in a first wavelength band among the light traveling in the waveguide.

Waveguide-type display apparatus

Provided are holographic display systems and methods for generating a hologram by compensating for aberrations of a holographic display device. The holographic display system may include a holographic display device and a hologram generating device. The hologram generating device may generate a hologram by propagating hologram segments, using kernels generated by modeling each aberration corresponding to each of hologram plane segments to compensate for aberrations.

Holographic display system and method for generating hologram by compensating for aberration of holographic display device

A display apparatus including a volume grating-based combiner is disclosed. The display apparatus includes: an image providing device; and a combiner, wherein the combiner includes a plurality of volume gratings configured to diffract light containing an image, which is emitted from the image providing device, each volume grating has a first surface and a second surface facing each other, and each volume grating is further configured to diffract light incident on the first surface and transmit therethrough light incident on the second surface without diffraction.

Display apparatus including volume grating based combiner

A retinal projection display device is provided. The retinal projection display device includes a light source configured to emit light, a spatial light modulator configured to generate diffracted light by diffracting the emitted light, a holographic optical element configured to reflect the diffracted light by duplicating the diffracted light into a plurality of complex wavefronts, and a field lens configured to focus the plurality of complex wavefronts to a plurality of respective focal points in an eye-box, wherein the plurality of complex wavefronts overlap each other.

Retinal projection display device and phase profile optimization method thereof

An image display device includes a main light source configured to emit a first light; a display panel configured to modulate the first light to add image information to the first light; a holographic optical element (HOE) configured to diffract the first light emitted from the display panel to make the first light travel to a first region to generate a main image; a first optical system provided on a traveling path of the first light between the main light source and the HOE, the first optical system being configured to change the traveling path of the first light to be incident on the HOE along a first path; an auxiliary light source configured to emit a second light; and a second optical system provided on a traveling path of the second light, the second optical system being configured to change a traveling path of the second light to be incident on the HOE along a second path different from the first path.

Image display device and augmented reality device including the same

A foveated display apparatus includes a first display panel configured to form a two-dimensional (2D) image; a second display panel configured to form a hologram image comprising a three-dimensional (3D) image; a light guide plate configured to transmit the 2D image at a first angle of view to an eye of a user; and a holographic optical element configured to transmit the hologram image at a second angle of view to the eye of the user, the second angle of view being smaller than the first angle of view.

Foveated display apparatus

Provided is a method of generating a hologram, the method including generating a kernel and a neural network configured to model an aberration of a holographic display device, obtaining second image data output from the neural network to which first image data obtained by propagating a first hologram based on the kernel is input, updating the kernel and the neural network based on comparing the second image data and predetermined image data, and generating a second hologram based on the kernel and the neural network.

Holographic display system and method of generating hologram

A waveguide type display apparatus is provided. This waveguide type display apparatus includes a waveguide through which an image proceeds and a leakage image reducer configured to reduce emission of a leakage image leaked from the waveguide without total internal reflection in the waveguide, from among images, to the outside by a volume grating.

Waveguide type display apparatus

A holographic lens and a display apparatus using the same as a combiner, the holographic lens including a phase profile obtained through an optimization process for each position to form an imaging optical system for forming a virtual image of lights emitted from a plurality of areas.

Holographic lens and apparatus including the same

A display device includes a light source array including a plurality of light sources where at least one of the plurality of light sources is selectively driven, a spatial light modulator for modulating light from the light source array to form image light, a focusing optical system for focusing the image light formed by the spatial light modulator at a position in a predetermined eye box, a micro mirror array arranged in an optical path formed in the focusing optical system and including a plurality of mirror cells. The plurality of mirror cells are controlled to be in an ON state in that light is reflected in a direction toward an inside of the eye box or to be in an OFF state in that light is reflected in a direction toward an outside of the eye box.

Growing community of inventors

Seoul, South Korea

Seokil Moon