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:
Mar. 04, 2003
Filed:
Jun. 08, 2000
Masataka Matsute, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A filter for adjusting an amount of light, in which an ND filter is loaded and unloaded by aperture blades not shown in the figure; (a) the ND filter is loaded in the light path, and the liquid crystal cell is controlled to make the transmittance minimum by the controlling voltage, so as to attain the minimum transmittance; (b) the ND filter is unloaded from the light path, and the liquid crystal cell is controlled to make the transmittance maximum by the controlling voltage, so as to attain the maximum transmittance; and the liquid crystal is controlled to have transmittance of an intermediate level by the controlling voltage, so as to attain intermediate transmittance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile