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. 05, 2015
Filed:
Mar. 24, 2006
Karin A. Johnson, Palm Harbor, FL (US);
Karin A. Johnson, Palm Harbor, FL (US);
The Nielsen Company (US), LLC, Schaumburg, IL (US);
Abstract
Methods and apparatus to detect an operating state of a display are disclosed. An example device to detect an operating state of a display includes an optical fiber, an optical-to-electrical converter, and a logic circuit. The optical fiber is optically coupled to a light source of the display. The light energy source is configured to emit light. The optical-to-electrical converter is coupled to the light source via the optical fiber and configured to convert light from the light source into an electrical signal. The logic circuit is coupled to the optical-to-electrical converter and configured to generate an output signal indicative of the operating state of the display based on the electrical signal.