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. 19, 2010
Filed:
Jun. 30, 2007
Ke-cai Zeng, Fremont, CA (US);
Steven Cummins, Santa Clara, CA (US);
Edward Huber, Portola Valley, CA (US);
Vincent UY, Fremont, CA (US);
Steven Sanders, Belomont, CA (US);
Patrick Zicolello, Santa Clara, CA (US);
Brett A. Spurlock, Los Altos, CA (US);
Ke-Cai Zeng, Fremont, CA (US);
Steven Cummins, Santa Clara, CA (US);
Edward Huber, Portola Valley, CA (US);
Vincent Uy, Fremont, CA (US);
Steven Sanders, Belomont, CA (US);
Patrick Zicolello, Santa Clara, CA (US);
Brett A. Spurlock, Los Altos, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A test system and method are provided for testing in parallel radiant output of multiple light emitting devices. Generally, the method involves: (i) providing a system having a master, calibrated power meter (CPM), a source transfer standard (STS), and multiple secondary, test site power meters (TSPMs); (ii) determining a relationship between electrical power supplied to the STS and a radiant output therefrom as measured by the CPM; (iii) calibrating the TSPMs using the STS and the relationship between the power supplied to the STS and the radiant output therefrom as determined by the CPM; and (iv) positioning the devices undergoing test on a fixture of the test system and positioning the fixture relative to the TSPMs to test radiant outputs of the devices. Preferably, the TSPMs are calibrated by exposing each to the STS at a known power, determining a difference between the radiant output measured by the CPM and TSPM, using this difference as an offset that is added to the a signal from the TSPM to provide a corrected radiant output for the device under test. Other embodiments are also disclosed.