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:
Oct. 02, 2001
Filed:
Nov. 20, 1998
Keijiro Naito, Matsumoto, JP;
Kazuto Shinohara, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A display device performs various types of adjustment by canceling luminance dispersion caused by a light source at the time of optical illumination from the light source and correctly sets a gamma correction characteristic even when optical power from the light source varies or is abnormal. In luminance measurement of a display device, an adjustment method includes measuring transmitted light using a sensor and a reference sensor, calculating correction values on the basis of fluctuation values of reference data derived from measured data by the sensor and the reference data by the reference sensor, correcting the measured data, and thereafter converting the data into gradation values.