200-in. full-color laser projection display

Young Mo Hwang; Jin-Ho Lee; Youngjun Park; Jungho Park; Seungnam Cha; Yonghoon Kim

doi:10.1117/12.305520

17 April 1998 200-in. full-color laser projection display

Young Mo Hwang, Jin-Ho Lee, Youngjun Park, Jungho Park, Seungnam Cha, Yonghoon Kim

Proceedings Volume 3296, Projection Displays IV; (1998) https://doi.org/10.1117/12.305520
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

A 200 inches large-area laser projection display is presented. the laser light processor is mainly composed of a white laser for light source, acousto-optic modulators and the laser beam scanner composed of a galvanometer and a polygon scan mirror. The white light source is a Krypton- Argon laser with main wavelengths 647nm, 515nm, 488nm, respectively. Collimated and focused laser beams are modulated at acousto-optic modulators according to the video signals. Dichroic mirrors are used for separating the white laser beam to red, green, blue light beams and recombining the modulated red, green, blue light beams to one light beam. Recombined laser beam is vertically scanned by a galvanometer running at 60Hz rate and horizontally scanned by the 24 facet polygon scan mirror rotating at the speed of 39,375rpm. Between the polygon scan mirror and the galvanometer, relay lenses are inserted for which horizontally scanned beam is focused onto the galvanometer mirror facet. The size of 4m X 3m image with high resolution is obtained at the throw distance of 7m using 4W white light.

Citation Download Citation

Young Mo Hwang, Jin-Ho Lee, Youngjun Park, Jungho Park, Seungnam Cha, and Yonghoon Kim "200-in. full-color laser projection display", Proc. SPIE 3296, Projection Displays IV, (17 April 1998); https://doi.org/10.1117/12.305520

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