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:
May. 09, 2000
Filed:
Aug. 31, 1999
Tatsuya Moriike, Fukushima-ken, JP;
Alps Electric Co., Ltd., , JP;
Abstract
A laser beam machine is used to locally remove color filters in a liquid crystal display via laser trimming. The laser beam machine includes an X-Y table, and a machine body containing a rotatable phase difference plate and a beam splitter that are arranged in the optical path of the laser beam. A workpiece is mounted on the X-Y table. The workpiece contains color filters that have been previously formed on transparent electrodes patterned on a transparent substrate. Beams spots are applied to the workpiece in a direction perpendicular to the longitudinal direction of the color filters and at a specific pitch. The laser beam machine may be used to form an opaque film around the color filters at low cost.