公开(公告)号：US09844107B2

公开(公告)日：2017-12-12

申请号：US14467251

申请日：2014-08-25

Applicant: Cree, Inc.

Inventor： Yuequan Hu ,  Nicholas William Medendorp, Jr. ,  Douglas E. Keiter

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0803 ,  H05B33/0851

Abstract: Driver circuitry is coupled between a power supply and at least one LED in a solid-state lighting fixture, such that a non-isolated direct current (DC) path exists between the power supply and the at least one LED. The driver circuitry is configured to receive an AC input voltage and generate a driver output current for driving the at least one LED from the AC input voltage. By using driver circuitry that is non-isolated from the at least one LED in the solid-state lighting fixture, the efficiency of the driver circuitry may be increased, while simultaneously reducing the cost and complexity of the driver circuitry compared to conventional driver circuitry.

公开(公告)号：US20170150570A1

公开(公告)日：2017-05-25

申请号：US15421999

申请日：2017-02-01

Applicant: Cree, Inc.

Inventor： Brian Kinnune ,  David Goelz ,  James Lay ,  Don Miletich ,  Alan Ruud ,  Kurt Wilcox ,  Yuequan Hu ,  Liqin Ni ,  Nicholas William Medendorp, JR. ,  Boris Karpichev

IPC: H05B33/08 ,  F21V29/83 ,  F21V29/74

CPC classification number: H05B33/0866 ,  F21K9/00 ,  F21S8/086 ,  F21V23/007 ,  F21V29/74 ,  F21V29/83 ,  F21W2131/103 ,  F21Y2101/00 ,  F21Y2103/10 ,  F21Y2113/13 ,  F21Y2115/10 ,  H05B33/0818 ,  H05B33/0827

Abstract: Systems and methods for a high output, high color quality light are disclosed. In some embodiments, such a light may include a light fixture including one or more LEDs configured to output a cumulative light output; wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens; and wherein the cumulative light output comprises a CRI of at least 90.

公开(公告)号：US20160057824A1

公开(公告)日：2016-02-25

申请号：US14467240

申请日：2014-08-25

Applicant: Cree, Inc.

Inventor： Yuequan Hu ,  Nicholas William Medendorp, JR. ,  Douglas E. Keiter

IPC: H05B33/08

CPC classification number: H05B33/0815

Abstract: A lighting fixture includes a solid-state light source and driver circuitry. The solid-state light source includes at least one light emitting diode (LED). The driver circuitry includes one or more silicon carbide (SiC) switching components, and is coupled to the solid-state light source. Further, the driver circuitry is configured to receive an alternating current (AC) input voltage and generate a driver output current for driving the at least one LED from the AC input voltage. By using silicon carbide (SiC) for the switching components in the driver circuitry, the efficiency of the driver circuitry and thus the lighting fixture may be significantly increased, while simultaneously reducing the cost and complexity of the driver circuitry and thus the lighting fixture when compared to conventional lighting fixtures.

Abstract translation: 照明灯具包括固态光源和驱动电路。 固态光源包括至少一个发光二极管（LED）。 驱动器电路包括一个或多个碳化硅（SiC）开关部件，并且耦合到固态光源。 此外，驱动器电路被配置为接收交流（AC）输入电压并且产生用于从AC输入电压驱动至少一个LED的驱动器输出电流。 通过使用碳化硅（SiC）作为驱动电路中的开关元件，驱动器电路和照明器具的效率可以显着提高，同时降低驱动器电路的成本和复杂性，从而降低照明器件的比例 传统照明灯具。

公开(公告)号：US20140218987A1

公开(公告)日：2014-08-07

申请号：US13761601

申请日：2013-02-07

Applicant: CREE, INC.

Inventor： Yuequan Hu ,  Qingcong Hu

IPC: H01F27/32 ,  H02M7/06

CPC classification number: H01F27/323 ,  H02M1/4225 ,  Y02B70/126

Abstract: A power supply circuit includes an input configured to receive an input voltage, an output configured to supply an output voltage, at least one inductor, at least one diode, and at least one switch. The inductor may have a parasitic capacitance less than about 100 pF. Related inductors are also disclosed.

Abstract translation: 电源电路包括被配置为接收输入电压的输入，被配置为提供输出电压的输出，至少一个电感器，至少一个二极管和至少一个开关。 电感器可具有小于约100pF的寄生电容。 还公开了相关电感器。

公开(公告)号：US20170231045A1

公开(公告)日：2017-08-10

申请号：US15018375

申请日：2016-02-08

Applicant: Cree, Inc.

Inventor： Yuequan Hu ,  Qingcong Hu

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0851

Abstract: A solid state light fixture includes a light emitting diode (LED) load and a driver circuit that selectively provides one of a switched-mode drive current and a linear-mode drive current to the LED load in response to a dimming control signal.

公开(公告)号：US20160057825A1

公开(公告)日：2016-02-25

申请号：US14467251

申请日：2014-08-25

Applicant: Cree, Inc.

Inventor： Yuequan Hu ,  Nicholas William Medendorp, JR. ,  Douglas E. Keiter

IPC: H05B33/08 ,  H01L29/16

CPC classification number: H05B33/0815 ,  H05B33/0803 ,  H05B33/0851

Abstract: Driver circuitry is coupled between a power supply and at least one LED in a solid-state lighting fixture, such that a non-isolated direct current (DC) path exists between the power supply and the at least one LED. The driver circuitry is configured to receive an AC input voltage and generate a driver output current for driving the at least one LED from the AC input voltage. By using driver circuitry that is non-isolated from the at least one LED in the solid-state lighting fixture, the efficiency of the driver circuitry may be increased, while simultaneously reducing the cost and complexity of the driver circuitry compared to conventional driver circuitry.

Abstract translation: 驱动器电路耦合在电源和固态照明器具中的至少一个LED之间，使得在电源和至少一个LED之间存在非隔离直流（DC）路径。 所述驱动器电路被配置为接收AC输入电压并产生用于从所述AC输入电压驱动所述至少一个LED的驱动器输出电流。 通过使用与固态照明灯具中的至少一个LED不隔离的驱动器电路，可以增加驱动器电路的效率，同时降低与常规驱动器电路相比的驱动器电路的成本和复杂性。

公开(公告)号：US09220146B2

公开(公告)日：2015-12-22

申请号：US13932717

申请日：2013-07-01

Applicant: Cree, Inc.

Inventor： Yuequan Hu

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0848

Abstract: A driver circuit for a lighting apparatus includes a current regulator configured to supply a load current to a load, and a control circuit coupled to the current regulator and configured to receive a dimming control signal and to linearly vary an amplitude of the load current in response to the dimming control signal.

Abstract translation: 用于照明装置的驱动器电路包括被配置为向负载提供负载电流的电流调节器和耦合到电流调节器并被配置为接收调光控制信号并且响应地线性地改变负载电流的幅度的控制电路 到调光控制信号。

公开(公告)号：US20150137689A1

公开(公告)日：2015-05-21

申请号：US14083070

申请日：2013-11-18

Applicant: CREE, INC.

Inventor： Yuequan Hu ,  Liqin Ni

IPC: H05B33/08

Abstract: Systems and methods for a current sharing driver for light emitting diodes are disclosed. One disclosed system includes: a first string of LEDs; a second string of LEDs connected in parallel with the first string; a first current control device connected in series with the first string of LEDs; a second current control device connected in series with the second string of LEDs; a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement circuit coupled to the first current control device and configured to control the first current control device; and a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement circuit coupled to the second current control device and configured to control the second current control device.

Abstract translation: 公开了用于发光二极管的电流共享驱动器的系统和方法。 一个公开的系统包括：第一串LED; 与第一串并联连接的第二串LED; 与第一串LED串联连接的第一电流控制装置; 与第二串LED串联连接的第二电流控制装置; 耦合到第一串LED和第二串LED的第一电压测量装置，第一电压测量电路耦合到第一电流控制装置并且被配置为控制第一电流控制装置; 以及耦合到所述第一LED串和所述第二LED串的第二电压测量装置，所述第二电压测量电路耦合到所述第二电流控制装置并且被配置为控制所述第二电流控制装置。

公开(公告)号：US20190245537A1

公开(公告)日：2019-08-08

申请号：US16385020

申请日：2019-04-16

Applicant: Cree, Inc.

Inventor： Yuequan Hu ,  Amruteshwar Hiremath ,  Kory A. Liszt

IPC: H03K17/68 ,  H03K17/72

CPC classification number: H03K17/68 ,  H03K17/72 ,  H03K2217/0009 ,  H03K2217/0054

Abstract: A high reliability AC load switching circuit is disclosed. In some embodiments, the AC load switching circuit includes a high-speed switch connected between the load and the voltage source, a cutoff switch connected between the load and the voltage source in parallel with the high-speed switch, and a level detector connected to the voltage source and to a control input of the high-speed switch. The high-speed switch may be a solid-state switch, for example, a TRIAC or a bidirectional switch, and the cutoff switch may be an electromechanical switch, for example, a relay. In some embodiments a snubber is connected in parallel with a solid-state switch. In some embodiments a microcontroller is connected to an electromechanical switch and the level detector. In some embodiments, both a first cutoff switch and a second cutoff switch are used.

公开(公告)号：US09763297B2

公开(公告)日：2017-09-12

申请号：US13667463

申请日：2012-11-02

Applicant: Cree, Inc.

Inventor： Yuequan Hu

IPC: H05B33/08

CPC classification number: H05B33/0818

Abstract: An apparatus includes a driver circuit configured to control a current through at least one LED responsive to a control signal. The apparatus further includes a modulated oscillator circuit configured to modulate an oscillating signal responsive to a dimming signal and to generate the control signal responsive to the modulated oscillating signal.