標題: Improving the quality of liquid-crystal projection image by multilevel diffractive grating technique
作者: Ko, FJ
Wu, CK
King, HJ
Wu, SY
Shieh, HPD
光電工程學系
Department of Photonics
關鍵字: liquid-crystal projection system;multilevel diffractive grating;VLSI process;plastic molding;pixel;depixelization
公開日期: 1-Jul-1999
摘要: A technique using multilevel diffractive gratings to suppress the discrete nature of liquid crystal display (LCD) projection images is demonstrated. The multilevel diffractive gratings, having a cross section similar to a staircase, are fabricated by VLSI processes and plastic molding. Upon positioning the diffractive gratings on the front surface of the LCD panel, the output light beams emitted from each pixel are diffracted mainly into the zeroth and the +/-first diffraction order light beams of equal energy. The light beams transformed by the diffractive gratings into orders higher than zeroth are able to fill up the dead space between each subpixel, and generate an array of images from each subpixel. As a result, the spatial frequency of the color subpixel distribution within the whole image is increased. Accordingly, the grain-like pixel structure in projection images is removed, at a slight expense of image resolution.
URI: http://dx.doi.org/10.1143/JJAP.38.4117
http://hdl.handle.net/11536/31265
ISSN: 0021-4922
DOI: 10.1143/JJAP.38.4117
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 38
Issue: 7A
起始頁: 4117
結束頁: 4121
Appears in Collections:Articles


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