Original document(15 pages) Authorized document(15 pages) 中文版
    The array of lenses in front of screen can make the ray from light source spread with uniform brightness in 180 deg. The charaster of the lens array is that the ratio of lens widths is not less than 1 and the ratio width between lenses and the top width is not less than 2. The charaster is that the two third of frount face of the lens array can be enveloped.
Application Number
申请号		 85101770 Application Date
申请日		 1985.04.01
Title 名称 Back Projection screen
Publication Number
公开号		 1009201 Publication Date
公开日		 1987.03.04
Approval Pub. Date Granted Pub. Date 1990.04.25
International Classification 分类号 G03B21/60
Applicant(s) Name
申请人		 Philips Light Mfg. Corp.
Address 地址
Inventor(s) Name 发明人
Attorney & Agent 代理人 CAO JIHONG LI XIANCHUN
More information 更  多  信  息


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