The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6997562 B1

PDF
Full Text
Expired
Date of Patent:
Feb. 14, 2006

Filed:

Mar. 26, 2004
Applicants:

Kun-ho Cho, Suwon-si, KR;

Dae-sik Kim, Suwon-si, KR;

Sang-chul Kwon, McLean, VA (US);

Inventors:

Kun-ho Cho, Suwon-si, KR;

Dae-sik Kim, Suwon-si, KR;

Sang-chul Kwon, McLean, VA (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/00 (2006.01); G03B 21/26 (2006.01); G03B 26/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A scrolling unit and a projection system using the same are provided. The scrolling unit is formed by spirally arranging on an outer circumferential surface of a column-like plate at least one lens cell which separates the incident light into a plurality of beams. As the scrolling unit rotates about a predetermined rotating axis, a lens array, defined by an area of the scrolling unit through which light passes, moves rectilinearly. Due to the use of the scrolling unit, a simple projection system can be obtained, and color scrolling is easily performed.


Find Patent Forward Citations

Cho, Kun-ho. (2006). Scrolling unit and projection system using the same (U.S. Patent No. 6997562). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6997562

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