Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Moon-gyu Han

Hong-seok Lee

Seung-hoon Han

Hong-shik Shim

Chang-gyun Shin

Sang-Yoon Lee

In-kyeong Yoo

Yong-wan Jin

Seog-jin Jeon

Jung Ho Shin

Sun-kook Kim

Chul-Joon Heo

Kyung-Jae Chung

An acousto-optic device capable of increasing a range of a diffraction angle of output light by using a nanostructured acousto-optic medium, and an optical scanner, an optical modulator, a two-dimensional/three-dimensional (2D/3D) conversion stereoscopic image display apparatus, and a holographic display apparatus using the acousto-optic device. The acousto-optic device may include a nanostructured acousto-optic medium formed by at least two different mediums repeatedly alternating with each other, wherein at least one of the at least two different mediums includes an acousto-optic medium. The acousto-optic device having the aforementioned structure may increase the range of a diffraction angle of output light. Thus, various systems such as the optical scanner, the optical modulator, the 2D/3D conversion stereoscopic image display apparatus, and the holographic display apparatus may not require a separate optical system to increase an operational angle range, thereby decreasing a size of the system and/or improving a resolution of the system.

Nanostructured acousto-optic device, and optical scanner, optical modulator, and holographic display apparatus using the nanostructured acousto-optic device

According to example embodiments, a reflective film includes a plurality of first concave-convex elements having a curved surface and a plurality of second concave-convex elements on the curved surface. The second concave-convex elements may be a smaller scale than a scale of the plurality of first concave-convex elements. The reflective structure may further include a color purity control element configured to reduce degradation of a color purity expressed by the reflective film. The color purity control element may be configured such that at least a complementary light with respect to a color light reflected by the reflective film travels in the same direction as the reflected color light.

Reflective structure and display apparatus employing the same

Tunable photonic crystal color filters, and color image display devices including the same, include a first electrode, a second electrode facing the first electrode, a medium between the first electrode and the second electrode, nano particles distributed in the medium in a lattice structure and charged, and an ion spread preventing layer over a surface of at least one of the first electrode and the second electrode.

Tunable photonic crystal color filters and color image display devices

A tunable photonic crystal color filter and a color image display apparatus including the same. A tunable photonic crystal color filter includes a first electrode, a second electrode on the first electrode, and a medium disposed between the first electrode and the second electrode. The medium includes charged nanoparticles having a lattice structure in the medium. The first electrode and the second electrode are formed of a material having a difference between an oxidative over-potential and a reductive over-potential.

Tunable photonic crystal color filter and color image display apparatus including the same

A display apparatus includes a light guide plate to emit light that enters through a side surface of the light guide plate through an upper surface of the light guide plate, a light source arranged on at least one side of the light guide plate, a reflection plate arranged under the light guide plate, a color filter layer arranged above the light guide plate, and an optical shutter arranged above the color filter layer to transmit or block at least a part of light according to electric control, wherein the color filter layer includes a transmission type color filter to transmit light in a particular wavelength band and reflect light in other wavelength bands.

Display apparatus having improved outdoor visibility

A nanostructured thin film used in a surface light source, including a dielectric layer, and nanostructures that are arranged periodically in the dielectric layer, wherein light emitted from the nanostructured thin film has directivity according to the nanostrucures.

Growing community of inventors

Yongin-si, South Korea

Moon-gyu Han