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.:
Date of Patent:
Jan. 18, 2005
Filed:
Feb. 12, 2002
Kun-ho Cho, Gyeonggi-do, KR;
Seung-tae Jung, Gyeonggi-do, KR;
Dae-sik Kim, Gyeonggi-do, KR;
Cheol-sung Yeon, Gyeonggi-do, KR;
Kun-ho Cho, Gyeonggi-do, KR;
Seung-tae Jung, Gyeonggi-do, KR;
Dae-sik Kim, Gyeonggi-do, KR;
Cheol-sung Yeon, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A front projection type screen includes a transparent base; a diffusion member formed on one surface of the transparent base; and a retroreflection prism array formed on another surface of the transparent base. Thus, a wide angle of visibility can be secured in a horizontal direction while an angle of visibility in a vertical direction is limited to a narrow scope. Also, a wide viewing angle can be achieved and high efficiency and brightness of light may be obtained.