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. 11, 2005
Filed:
Feb. 26, 2003
Kunio Ueta, Kyoto, JP;
Kunio Ueta, Kyoto, JP;
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
In a color filter inspection apparatus (), an image pickup part () for performing an image pickup of a color filter () which travels along guide rails () from above with a line sensor () and a fluorescence lamp () for irradiating the color filter () with an illumination light from below are provided and an optical filter () which transmits a light in a predetermined wavelength band is attached to the image pickup part (). A transmission wavelength band of the optical filter () is a wavelength band in which the transmittance of one color component filter of the color filter () is high and transmittances of other color component filters are low. It is thereby possible to inspect unevenness in color of the color filter () with respect to one color component filter with high precision.