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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.:

US 12381190 B1

PDFFull Text
Date of Patent:
Aug. 05, 2025

Filed:

Jan. 07, 2024

Warm dimming led-filaments and led-filament lamps

Applicant:

Intematix Corporation, Fremont, CA (US);

Inventors:

Yi-Qun Li, Danville, CA (US);

Jun-Gang Zhao, Fremont, CA (US);

Gang Wang, Sunnyvale, CA (US);

Assignee:

Intematix Corporation, Fremont, CA (US);

Attorney:

Shirley A. Recipon

Primary Examiner:

William N Harris

Int. Cl.
CPC ...
H01L 25/075 (2006.01); C09K 11/61 (2006.01); C09K 11/66 (2006.01); C09K 11/67 (2006.01); F21K 9/232 (2016.01); F21K 9/238 (2016.01); F21K 9/278 (2016.01); F21Y 103/10 (2016.01); F21Y 107/50 (2016.01); F21Y 113/17 (2016.01); F21Y 115/10 (2016.01); H10D 1/47 (2025.01); H10H 20/80 (2025.01); H10H 20/851 (2025.01); H10H 20/857 (2025.01);
U.S. Cl.
CPC ...
H01L 25/0753 (2013.01); C09K 11/617 (2013.01); C09K 11/665 (2013.01); C09K 11/675 (2013.01); F21K 9/232 (2016.08); F21K 9/238 (2016.08); F21K 9/278 (2016.08); H10D 1/47 (2025.01); H10H 20/8513 (2025.01); H10H 20/8515 (2025.01); H10H 20/857 (2025.01); F21Y 2103/10 (2016.08); F21Y 2107/50 (2016.08); F21Y 2113/17 (2016.08); F21Y 2115/10 (2016.08); H10H 20/882 (2025.01);
Abstract

An embodiment of an LED lamp that generates light of a color temperature that decreases with decreasing power applied to the LED lamp may include at least one lighting arrangement that may include a first LED array of serially connected first LED chips, a second LED array of serially connected second LED chips; a first photoluminescence layer covering the first LED array for generating light of a first color temperature; a second photoluminescence layer covering the second LED array for generating light of a second different color temperature; and a linear resistor serially connected to the first LED array, wherein the first LED array and second LED array are connected in parallel.

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