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:
Jun. 29, 2010
Filed:
Apr. 23, 2008
Hsin-li Lin, Taipei Hsien, TW;
I-pen Chien, Taipei Hsien, TW;
Kuang-wei Lin, Taipei Hsien, TW;
Po-yuan Lai, Taipei Hsien, TW;
Hsin-Li Lin, Taipei Hsien, TW;
I-Pen Chien, Taipei Hsien, TW;
Kuang-Wei Lin, Taipei Hsien, TW;
Po-Yuan Lai, Taipei Hsien, TW;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A testing system measures central angles of filter segments of a color wheel. The color wheel includes a color filter, which includes three sector-shaped filter segments and a motor for driving the filter segments to rotate. The testing system includes a sensor and a processor. The sensor emits light toward the color filter and receives light reflected back by the color filter, and generates an impulse signal according to intensity changes of the light reflected back by the color filter. The impulse signal includes a plurality of boundary impulses corresponding to boundaries formed between adjacent filter segments. The processor calculates central angles of the filter segments according to relationships between the boundary impulses.