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公开(公告)号：US12114404B2
公开(公告)日：2024-10-08
申请号：US17951880
申请日：2022-09-23
Applicant: Railway Equipment Company, Inc.
Inventor： David K. Fox , Jason Honeck
CPC classification number: H05B45/32 , B61L29/288 , B61L29/32 , H05B47/16
Abstract: A method of operating a warning light assembly at a railway crossing, as well as a warning light assembly operable in accordance with such a method, are disclosed. An example method includes receiving a voltage signal at the warning light assembly that corresponds to a railway crossing event. The method includes initiating a warning light flashing sequence that includes, during a first time period, illuminating the warning light during receipt of the voltage signal in a flashing pattern having a flashing frequency. The warning light flashing sequence also includes, during a second time period after the first time period, discontinuing the flashing pattern and illuminating the warning light in accordance with the voltage signal. Upon determining that receipt of the voltage signal at the warning light assembly is discontinued for at least for a predetermined time, the warning light flashing sequence is reinitialized for a next railway crossing event.
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公开(公告)号：US20240130018A1
公开(公告)日：2024-04-18
申请号：US18397488
申请日：2023-12-27
Applicant: ROHM CO., LTD.
Inventor： Akira AOKI , Ryo TAKAGI
IPC: H05B45/3725 , H05B45/32 , H05B45/34 , H05B45/345 , H05B45/50
CPC classification number: H05B45/3725 , H05B45/32 , H05B45/34 , H05B45/345 , H05B45/50
Abstract: For example, a semiconductor device disclosed in the present description is configured to function as a component of a switching power supply, and includes: a current sense signal generator configured to generate a current sense signal by amplifying a sense voltage corresponding to the output current of the switching power supply; a voltage sense signal generator configured to generate a voltage sense signal corresponding to the output voltage of the switching power supply; a selector configured to output as a selected sense signal one of the current sense signal and the voltage sense signal according to a mode switch signal; and an output feedback controller configured to control the driving of the switching power supply based on the selected sense signal.
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公开(公告)号：US20230389157A1
公开(公告)日：2023-11-30
申请号：US17827551
申请日：2022-05-27
Applicant: SEMISILICON TECHNOLOGY CORP.
Inventor： Wen-Chi PENG
Abstract: An LED light string control system includes an LED light string, a voltage generation apparatus, and a control module. The control module controls the voltage generation apparatus to change a signal provided to the LED light string to a first voltage level according to a first logic of a light command, and changes the signal to a second voltage level according to a second logic of the light command. The control module controls the voltage generation apparatus to change the signal to a distinction voltage level once the first logics and/or the second logics of the light command appear consecutively.
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公开(公告)号：US20230337340A1
公开(公告)日：2023-10-19
申请号：US17937785
申请日：2022-10-04
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chih-Hsien WANG , Ming-Chieh CHENG , Po-Yen CHEN , Shih-Chieh CHANG , Kuan-Hsien TU , Xiu-Yi LIN , Ling-Chun WANG
IPC: H05B45/10 , H05B45/32 , H05B47/155
CPC classification number: H05B45/10 , H05B45/32 , H05B47/155
Abstract: A lighting device includes a light board and a light dimmer circuit. The light board includes multiple first light emitting elements and second light emitting elements. The first light emitting elements are disposed in a first area of the light board. The second light emitting elements are disposed in a second area of the light board. The light dimmer circuit is configured to drive the second light emitting elements to generate flickering lights from the second area of the light board, and is configured to drive the first light emitting elements to generate non-flickering lights from the first area of the light board.
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公开(公告)号：US11936973B2
公开(公告)日：2024-03-19
申请号：US17732219
申请日：2022-04-28
Applicant: Lumileds LLC
Inventor： Arjen Gerben Van der Sijde , Erno Fancsali , Nicola Bettina Pfeffer , Pieter Johannes Quintus van Voorst Vader
CPC classification number: H04N23/56 , G01B11/22 , G06T7/50 , H04N23/71 , H05B45/32 , G06T2207/10048
Abstract: The invention describes an infrared imaging assembly (1) for capturing an infrared image (M0, M1) of a scene (S), comprising an infrared-sensitive image sensor (14); an irradiator (10) comprising an array of individually addressable infrared-emitting LEDs, wherein each infrared-emitting LED is arranged to illuminate a scene region (S1, . . . , S9); a driver (11) configured to actuate the infrared irradiator (10) by applying a switching pulse train (T1, . . . , T9) to each infrared-emitting LED; an image analysis module (13) configured to analyse a preliminary infrared image (M0) to determine the required exposure levels (130) for each of a plurality of image regions (R1, . . . , R9); and a pulse train adjusting unit (12) configured to adjust the duration (L1, . . . , L9) of a switching pulse train (T1, . . . , T9) according to the required exposure levels (130). The invention also described a method of generating a depth map (D) for a scene (S); a depth map generator comprising an embodiment of the inventive infrared imaging assembly (1); and a camera comprising such a depth map generator (2).
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Patent Agency Ranking
公开(公告)号：US11895751B2
公开(公告)日：2024-02-06
申请号：US17950938
申请日：2022-09-22
Applicant: Joulwatt Technology Co., Ltd.
Inventor： Wanyue He , Guoqiang Liu
Abstract: A leakage protection circuit and a dimming drive circuit are provided. A leakage detection circuit is configured to detect whether leakage occurs between two input terminals that receive an external signal. When leakage occurs, leakage protection measures are taken. A pulse generation circuit receives the sampling signal characterizing the voltage between the two input terminals to compare the sampling signal with two thresholds to control a detection path of the leakage detection circuit to be turned on or off according to a comparison result. The leakage detection path is enabled to be turned on twice by setting two pulse signals in a power frequency period, which can consider the leakage detection of the front-edge phase-cutting dimming and rear-edge phase-cutting dimming of the dimming drive circuit and has a wide range of applications.
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公开(公告)号：US20230363062A1
公开(公告)日：2023-11-09
申请号：US18195799
申请日：2023-05-10
Applicant: ROKU, INC.
Inventor： GREGORY MACK GARNER
IPC: H05B45/12 , H05B47/11 , H05B45/10 , H05B45/30 , H05B45/305 , H05B45/32 , H05B47/125
CPC classification number: H05B45/12 , H05B47/11 , H05B45/10 , H05B45/30 , H05B45/305 , H05B45/32 , H05B47/125
Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for a dimmer device including a driver, and a controller communicatively coupled to the driver and to a monitor device. The monitor device can include a camera and is configured to take a plurality of images of the illumination load. The controller provides a control signal that indicates to the driver to adjust power supplied to an illumination load. The control signal is provided in response to a determination that a performance of the illumination load fails to satisfy a predetermined performance indicator. The performance of the illumination load is determined based on information related to the plurality of images of the illumination load taken by the camera of the monitor device. The controller can adjust a dimming level of the illumination load by providing the control signal to the driver.
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公开(公告)号：US11751304B1
公开(公告)日：2023-09-05
申请号：US17889406
申请日：2022-08-17
Applicant: Wen-Sung Lee
Inventor： Wen-Sung Lee
CPC classification number: H05B45/32
Abstract: A LED feedback voltage regulating driving device is provided. The LED feedback voltage regulating driving device includes a microcontroller, a first feedback circuit, a second feedback circuit, an oscillating circuit and a comparison circuit. The first feedback circuit and the second feedback circuit adjust the voltage and current from the electricity supply module and the driving circuit respectively, and transmit the voltage and current to the microcontroller; wherein, the microcontroller and the oscillating circuit reciprocate the voltage and current from the first feedback circuit and the second feedback circuit; wherein the comparison circuit compares the signal from the microcontroller and the oscillating circuit; wherein the pulse circuit adjusts the voltage and the current then transmits the voltage and current to the driving circuit for electricity driving; wherein, during the electricity driving, the driving circuit transmits part of the voltage and current to the second feedback circuit.
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公开(公告)号：US11690149B2
公开(公告)日：2023-06-27
申请号：US17848796
申请日：2022-06-24
Applicant: Roku, Inc.
Inventor： Gregory Mack Garner
IPC: H05B45/12 , H05B47/11 , H05B45/10 , H05B45/30 , H05B45/305 , H05B45/32 , H05B47/125
CPC classification number: H05B45/12 , H05B45/10 , H05B45/30 , H05B45/305 , H05B45/32 , H05B47/11 , H05B47/125
Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for a dimmer device including a driver, and a controller communicatively coupled to the driver and to a monitor device. The monitor device can include a camera and is configured to take a plurality of images of the illumination load. The controller provides a control signal that indicates to the driver to adjust power supplied to an illumination load. The control signal is provided in response to a determination that a performance of the illumination load fails to satisfy a predetermined performance indicator. The performance of the illumination load is determined based on information related to the plurality of images of the illumination load taken by the camera of the monitor device. The controller can adjust a dimming level of the illumination load by providing the control signal to the driver.
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公开(公告)号：US11974367B2
公开(公告)日：2024-04-30
申请号：US17937785
申请日：2022-10-04
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chih-Hsien Wang , Ming-Chieh Cheng , Po-Yen Chen , Shih-Chieh Chang , Kuan-Hsien Tu , Xiu-Yi Lin , Ling-Chun Wang
IPC: H05B45/10 , H05B45/32 , H05B47/155
CPC classification number: H05B45/10 , H05B45/32 , H05B47/155
Abstract: A lighting device includes a light board and a light dimmer circuit. The light board includes multiple first light emitting elements and second light emitting elements. The first light emitting elements are disposed in a first area of the light board. The second light emitting elements are disposed in a second area of the light board. The light dimmer circuit is configured to drive the second light emitting elements to generate flickering lights from the second area of the light board, and is configured to drive the first light emitting elements to generate non-flickering lights from the first area of the light board.
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