IP Library › Granted Patent US 11,098,246
Granted Patent B2
US 11,098,246 · App. 16/294,651 · Granted Aug 24, 2021

Color stable red-emitting phosphors

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Quick Facts
Patent No.
US 11,098,246
App. No.
16/294,651
Granted
Aug 24, 2021
Kind
B2
Abstract

A lighting apparatus includes a semiconductor light source in direct contact with a polymer composite comprising a color stable Mn 4+ doped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hour at a LED current density greater than 2 A/cm 2 , a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C.

Claims (2)

1. A lighting apparatus comprising a semiconductor light source in direct contact with a polymer composite comprising a color stable Mn 4+ doped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hours at a LED current density greater than 2 A/cm 2 , a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C. wherein the color stable Mn 4+ doped phosphor is annealed K 2 SiF 6 :Mn 4+ .

2. A lighting apparatus according to claim 1 , wherein the MacAdam ellipse color shift is ≤1.

Assignments (6)
CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT NUMBER PREVIOUSLY RECORDED AT REEL: 059034 FRAME: 0469. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY INTEREST. Recorded Jan 25, 2024
From: HUBBELL LIGHTING, INC.; LITECONTROL CORPORATION; CURRENT LIGHTING SOLUTIONS, LLC; DAINTREE NETWORKS INC.; FORUM, INC.
To: ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT
Reel/Frame 066372/0590 →
CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT NUMBER 10841994 TO PATENT NUMBER 11570872 PREVIOUSLY RECORDED ON REEL 058982 FRAME 0844. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Recorded Jan 19, 2024
From: HUBBELL LIGHTING, INC.; LITECONTROL CORPORATION; CURRENT LIGHTING SOLUTIONS, LLC; DAINTREE NETWORKS INC.; FORUM, INC.
To: ALLY BANK, AS COLLATERAL AGENT
Reel/Frame 066355/0455 →
SECURITY INTEREST Recorded Feb 11, 2022
From: HUBBELL LIGHTING, INC.; LITECONTROL CORPORATION; CURRENT LIGHTING SOLUTIONS, LLC; DAINTREE NETWORKS INC.; FORUM, INC.
To: ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT
Reel/Frame 059034/0469 →
SECURITY AGREEMENT Recorded Feb 2, 2022
From: HUBBELL LIGHTING, INC.; LITECONTROL CORPORATION; CURRENT LIGHTING SOLUTIONS, LLC; DAINTREE NEETWORKS INC.; FORUM, INC.
To: ALLY BANK, AS COLLATERAL AGENT
Reel/Frame 058982/0844 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 5, 2020
From: MURPHY, JAMES EDWARD; SETLUR, ANANT ACHYUT; GARCIA, FLORENCIO; LYONS, ROBERT JOSEPH; CHOWDHURY, ASHFAQUL ISLAM; KARKADA, NAGAVENI; NAMMALWAR, PRASANTH KUMAR; BEERS, WILLIAM WINDER
To: GENERAL ELECTRIC COMPANY
Reel/Frame 052569/0373 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 5, 2020
From: GENERAL ELECTRIC COMPANY
To: CURRENT LIGHTING SOLUTIONS, LLC
Reel/Frame 052569/0958 →