Samsung Electronics Co., Ltd.

Sang-hyun Sohn

Jeong-ho Nho

Sang-Soo Lee

Sung-Tae Kim

Young-chol Lee

Yung-jun Park

Kirill Sokolov

Won-yong Lee

Wook-Jae Jeon

Yong-dok Cha

Yong-Dok Cha

Seok-chan Hong

Alexey Vladimirovich Bratishchev

Irina Vladimirovna Sergievskaya

Maria Valerievna Potapova

Provided is a front reflection screen for a front projection display apparatus. The front reflection screen includes a reflection layer configured to reflect an incident light including an image light projected from a projector and an external light, and a tint layer disposed before the reflection layer and including light absorbing particles to block a portion of the incident light.

Reflection type screen for front projection display apparatus

A projection screen is provided, which includes a reflective layer having plural reflective patterns which are spaced apart from one another and each of which includes an image reflective surface having an inclination angle against a horizontal direction so as to guide an image light toward a front of the screen, and plural external light absorption layers absorbing external lights incident to the screen.

Projection screen and projection system having the same

Provided is a projection optical system. The projection optical system includes: A projection optical system comprising: a first optical part that comprises at least one optical lens, and projects and displays light beams; a second optical part that comprises an image forming element and at least one optical lens, and emits incident light beams as light beams with images; and a third optical part that comprises a light source unit and a deflector that is located between the first and second optical parts, and directs light beams emitted from the light source unit to the second optical part and directs the light beams with images emitted from the second optical part to the first optical part.

Projection optical system

A projection display apparatus includes: an illumination optical unit which emits beams; an image display element which modulates the beams according to image information; a spatial-beam changing unit which changes spatial positions of the beams emitted from the illumination optical unit; and a uniform-beam distribution unit, disposed between the spatial-beam changing unit and the image display element, which uniformly distributes the beams. The spatial-beam changing unit includes a moveable prism, a movement of which changes the spatial positions of the beams emitted therefrom.

Projection display apparatus comprising a spatial-beam changing unit which changes spatial positions of beams

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Suwon-si, South Korea

Sang-hyun Sohn