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:
Jun. 21, 2022
Filed:
Jun. 03, 2020
Ferro Corporation, Mayfield Heights, OH (US);
Cody J. Gleason, Solon, OH (US);
Srinivasan Sridharan, Strongsville, OH (US);
George E. Sakoske, Independence, OH (US);
Ellen S. Tomey, Princeton Junction, NJ (US);
Chao Ma, Collegeville, PA (US);
Jackie D. Davis, Cleveland, OH (US);
Yi Yang, Fort Washington, PA (US);
Stanley Wang, Taipei, TW;
Ferro Corporation, Mayfield Heights, OH (US);
Abstract
A phosphor in glass (PiG) cover is provided to modulate the color emitted from an LED chip. The PiG cover includes an active layer including glass and phosphor, and a secondary layer including glass and free of phosphor. The active layer is stacked on the secondary layer to form the PiG cover. Alternately the PiG includes an active layer sandwiched between two secondary layers. Two or more active layers can be stacked to each other or disposed side-by-side. An LED chip is arranged under the PiG cover to form an LED package.