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:
Jul. 03, 2007
Filed:
Nov. 19, 2004
Jui-chi Wu, Taoyuan, TW;
Yao-chung Cheng, Taoyuan, TW;
Jui-Chi Wu, Taoyuan, TW;
Yao-Chung Cheng, Taoyuan, TW;
Optimax Technology Corporation, Taoyuan, TW;
Abstract
In a polarizing plate grading method a first measurement range Ais chosen on a polarizing plate. After conducting an initial measurement by putting the polarizing plate under X° C. for Yhours, the first measurement range is measured to obtain the maximum chromatic value Z(NIT,cd/m), and the minimum chromatic value Z. The minimum value is subtracted from the maximum value to obtain the net chromatic difference value W. The temperature change measurement is conducted by putting the polarizing plate under X° C. for Yhours and, then, the recovery measurement is conducted on the polarizing plate by putting the polarizing plate under X° C. for Yhours. A first measurement range is measured to obtain the maximum chromatic value Zand the minimum chromatic value Z. The minimum chromatic value is subtracted from the maximum chromatic value to obtain the net chromatic difference value W. The polarizing plate grading index Q is obtained by dividing the value obtained from subtracting the net chromatic difference value Wobtained in the initial measurement from the net chromatic difference value Wobtained in the recovery measurement, by the net chromatic difference value Wso as to grade the polarizing plates.