公开(公告)号：US12101857B2

公开(公告)日：2024-09-24

申请号：US17627511

申请日：2020-07-13

Applicant: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH

Inventor： Ulf Ehrhardt

IPC: H05B45/325 ,  G07D7/121 ,  H05B45/375

CPC classification number: H05B45/325 ,  G07D7/121 ,  H05B45/375

Abstract: A light source driver circuit has a switching regulator including a voltage input, a voltage output, and a regulation input; a current source with a switching element and a voltage-controllable member arranged in series with the light source load. A pulse signal is applied to a control terminal of the switching element to connect, in a first switching state of the switching element, a control terminal of the voltage-controllable member to a voltage source and in a second switching state of the switching element not to connect the control terminal of the voltage-controllable member to the voltage source; and a regulation unit. An optical measuring instrument includes a light source driver circuit, a device checks value documents with the light source driver circuit, and a method is provided for operating a light source load with the light source driver circuit.

公开(公告)号：US20240215131A1

公开(公告)日：2024-06-27

申请号：US18430386

申请日：2024-02-01

Applicant: Lutron Technology Company LLC

Inventor： Ryan M. Bocock ,  Quinn Brogan

IPC: H05B45/385 ,  H05B45/375

CPC classification number: H05B45/385 ,  H05B45/375

Abstract: A power converter circuit may include a control circuit configured to generate a drive signal for rendering a semiconductor switch conductive and non-conductive to generate a bus voltage across a bus capacitor. The control circuit may adjust a minimum operating period of the drive signal to a first value when an output power of the power converter circuit is greater than a first threshold and to a second value when the output power is less than a second threshold. The control circuit may comprise a comparator that generates the drive signal in response to a sense voltage and a threshold voltage. When operating in a standby mode, the control circuit may adjust a magnitude of the threshold voltage based on an instantaneous magnitude of an alternating-current line voltage received by the power converter circuit, such that an input current drawn by the power converter circuit is sinusoidal.

公开(公告)号：US20240172351A1

公开(公告)日：2024-05-23

申请号：US18550993

申请日：2021-09-10

Applicant: WUXI DECHIP MICROELECTRONICS CO., LTD.

Inventor： Xiancheng ZHANG ,  Xing’an ZHOU

IPC: H05B47/165 ,  H05B45/325 ,  H05B45/375 ,  H05B45/42

CPC classification number: H05B47/165 ,  H05B45/325 ,  H05B45/375 ,  H05B45/42

Abstract: A light-emitting diode (LED) control system is provided, including: a controller (10) and an LED light string (20) electrically connected to the controller (10). The controller (10) includes a first data output port (VA) and a second data output port (VB), and is configured to send a first data signal via the first data output port (VA) and send a second data signal via the second data output port (VB); the first data signal and the second data signal have opposite phases; and the LED light string (20) is capable of receiving the first data signal and the second data signal via a data receiving port, implementing display control of LEDs according to the first data signal and the second data signal. The LED control system is simple in implementation, low in cost, and high in reliability.

公开(公告)号：USRE49637E1

公开(公告)日：2023-08-29

申请号：US16986968

申请日：2020-08-06

Applicant: IDEAL INDUSTRIES LIGHTING LLC

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

IPC: H05B33/00 ,  H05B33/08 ,  H05B45/3725 ,  F21V29/74 ,  F21V29/83 ,  H05B45/46 ,  H05B45/24 ,  F21K9/00 ,  F21S8/08 ,  F21V23/00 ,  F21Y113/13 ,  F21Y103/10 ,  F21Y115/10 ,  H05B45/38 ,  H05B45/375 ,  F21W131/103

CPC classification number: H05B45/3725 ,  F21K9/00 ,  F21S8/086 ,  F21V23/007 ,  F21V29/74 ,  F21V29/83 ,  H05B45/24 ,  H05B45/46 ,  F21W2131/103 ,  F21Y2103/10 ,  F21Y2113/13 ,  F21Y2115/10 ,  H05B45/375 ,  H05B45/38

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：US20230247740A1

公开(公告)日：2023-08-03

申请号：US18297697

申请日：2023-04-10

Applicant: Lutron Technology Company LLC

Inventor： Timothy P. Gredler ,  Matthew R. Zartman

IPC: H05B45/3725 ,  H05B45/10 ,  H05B45/395 ,  H05B45/335 ,  H05B45/375 ,  H05B45/385

CPC classification number: H05B45/3725 ,  H05B45/10 ,  H05B45/395 ,  H05B45/335 ,  H05B45/375 ,  H05B45/385

Abstract: A load control device for controlling the intensity of a lighting load, such as a light-emitting diode (LED) light source, may include a power converter circuit operable to receive a rectified AC voltage and to generate a DC bus voltage, a load regulation circuit operable to receive the bus voltage and to control the magnitude of a load current conducted through the lighting load, and a control circuit operatively coupled to the load regulation circuit for pulse width modulating or pulse frequency modulating the load current to control the intensity of the lighting load to a target intensity. The control circuit may control the intensity of the lighting load by pulse width modulating the load current when the target intensity is above a predetermined threshold and control the intensity of the lighting load by pulse frequency modulating the load current when the target intensity is below the predetermined threshold.

公开(公告)号：US11711875B2

公开(公告)日：2023-07-25

申请号：US17728609

申请日：2022-04-25

Applicant: Lutron Technology Company LLC

Inventor： Venkatesh Chitta ,  Jeffrey S. Hayes ,  Robert D. Stevens, Jr.

IPC: H05B45/38 ,  H02M3/335 ,  H05B45/10 ,  H05B45/50 ,  H05B45/395 ,  H05B45/327 ,  H05B45/345 ,  H05B45/385 ,  H05B45/39 ,  H05B45/37 ,  H05B44/00 ,  H02M1/08 ,  H05B45/3725 ,  H05B45/375 ,  H02M1/00 ,  H02M3/00

CPC classification number: H05B45/38 ,  H02M1/08 ,  H02M3/33507 ,  H02M3/33569 ,  H02M3/33571 ,  H05B44/00 ,  H05B45/10 ,  H05B45/327 ,  H05B45/345 ,  H05B45/37 ,  H05B45/385 ,  H05B45/39 ,  H05B45/395 ,  H05B45/50 ,  H02M1/0009 ,  H02M1/0035 ,  H02M1/0058 ,  H02M3/01 ,  H05B45/375 ,  H05B45/3725 ,  Y02B70/10

Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.

公开(公告)号：US11665800B2

公开(公告)日：2023-05-30

申请号：US17552507

申请日：2021-12-16

Applicant: Maxim Integrated Products, Inc.

Inventor： Suresh Hariharan ,  Gregory Michael Fattig ,  Ramesh Selvaraj ,  Ron Vincent Ocampo

IPC: H05B45/30 ,  H05B45/375 ,  H05B45/38

CPC classification number: H05B45/375 ,  H05B45/38

Abstract: Described herein are systems and methods for operating DC-DC regulators such as LED drivers. Various embodiments herein allow a DC-DC regulator to switch between buck mode and buck-boost mode without suffering effects otherwise resulting from transient currents when switching between modes. In certain embodiments, this is accomplished by operating the DC-DC regulator in a buck-boost mode to charge a boost capacitor with a substantially constant inductor current. The inductor current is also used to control a set of switches to operate the DC-DC regulator in a buck mode to drive a load by using the capacitor as a power source.

公开(公告)号：US11653430B2

公开(公告)日：2023-05-16

申请号：US17528546

申请日：2021-11-17

Applicant: ETI Solid State Lighting (Zhuhai) Ltd.

Inventor： Tinghong Li ,  Xiaobing Luo ,  Huasheng Zhao

IPC: H05B45/34 ,  H05B45/375 ,  H05B45/50

CPC classification number: H05B45/34 ,  H05B45/375 ,  H05B45/50

Abstract: Disclosed are a lamp control system and a control method thereof. The lamp control system includes: an LED light source assembly, an AC input end, an on-off switch, an EMI filter circuit, a rectifier filter circuit, a buck circuit, a rectifier output circuit, a voltage stabilizing circuit, and a control circuit; the EMI filter circuit is connected to the AC input end through the on-off switch; the EMI filter circuit, the rectifier filter circuit, the buck circuit, and the rectifier output circuit are electrically connected in sequence; the rectifier filter circuit, the voltage stabilizing circuit, the control circuit, and the buck circuit form a closed-loop circuit, the rectifier output circuit is electrically connected to the LED light source assembly.

公开(公告)号：US20240334569A1

公开(公告)日：2024-10-03

申请号：US18620961

申请日：2024-03-28

Applicant: ERP POWER, LLC

Inventor： Michael Archer ,  Louis Chen ,  James H. Mohan ,  Steven C. Krattiger ,  Erik Morales ,  Vachik Javadian ,  Yuko Nakazawa

IPC: H05B45/375 ,  H05B45/34 ,  H05B45/355 ,  H05B47/16

CPC classification number: H05B45/375 ,  H05B45/34 ,  H05B45/355 ,  H05B47/16

Abstract: A lighting system includes a converter configured to receive a rectified input voltage and to generate an output voltage based on a control signal; a primary controller configured to generate the control signal to adjust the output voltage of the converter; and a startup circuit configured to power the primary controller based on the rectified input voltage in response to the output voltage being below a threshold, and to power the primary controller based on the output voltage in response to the output voltage being greater than or equal to the threshold.

公开(公告)号：US20240324082A1

公开(公告)日：2024-09-26

申请号：US18737168

申请日：2024-06-07

Applicant: HISENSE VISUAL TECHNOLOGY CO., LTD.

Inventor： Zhenhua PANG

IPC: H05B45/375 ,  H05B45/34 ,  H05B45/38 ,  H05B45/385

CPC classification number: H05B45/375 ,  H05B45/34 ,  H05B45/38 ,  H05B45/385

Abstract: A display device and a display control method. A power adjustment module is provided in a power supply circuit of a display device. The power adjustment module transmits energy between voltages outputted by a power supply circuit respectively to a main board and an LED light strip, such that the voltages provided by the power supply circuit to the main board and the LED light strip are within respective preset voltage ranges, and no large adjustments to voltage values are required. Therefore, the working efficiency of the entire power supply circuit can be improved, and the costs of the power supply circuit and the display device are reduced.