US9271350B2 - Lighting control circuit, lamp, and lighting control method using the lighting control circuit - Google Patents

Lighting control circuit, lamp, and lighting control method using the lighting control circuit Download PDF

Info

Publication number
US9271350B2
US9271350B2 US14/013,455 US201314013455A US9271350B2 US 9271350 B2 US9271350 B2 US 9271350B2 US 201314013455 A US201314013455 A US 201314013455A US 9271350 B2 US9271350 B2 US 9271350B2
Authority
US
United States
Prior art keywords
light emitter
startup
series light
electric ballast
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US14/013,455
Other languages
English (en)
Other versions
US20140062320A1 (en
Inventor
Masaharu Urano
Hidefumi Nakashima
Shigemi Hagiwara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=50186558&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US9271350(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Assigned to RICOH COMPANY, LTD. reassignment RICOH COMPANY, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAGIWARA, SHIGEMI, NAKASHIMA, HIDEFUMI, URANO, Masaharu
Publication of US20140062320A1 publication Critical patent/US20140062320A1/en
Application granted granted Critical
Publication of US9271350B2 publication Critical patent/US9271350B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/357—Driver circuits specially adapted for retrofit LED light sources
    • H05B45/3578—Emulating the electrical or functional characteristics of discharge lamps
    • H05B33/0815—
    • H05B33/0806—
    • H05B33/0827—
    • H05B33/0845—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to a lighting control circuit for use in controlling lighting of a solid-state light-emitting element, a lamp, and a lighting control method using the lighting control circuit.
  • a lamp using, for example, a light-emitting diode (LED) as a battery-friendly solid-state light-emitting element is proposed instead of a fluorescent lamp having filament electrodes (refer to, for example, JP2008-277188A).
  • a lamp having a solid-state light-emitting element can be exchangeably attached not only to a lighting device for a glow starter fluorescent lamp or a rapid starter fluorescent lamp but also to a lighting device having an inverter electronic ballast for a fluorescent lamp.
  • a lamp different from a commercial fluorescent lamp is connected to an electronic ballast of a fluorescent lamp, so that a protection operation of the electronic ballast operates, which may disturb the lighting of the lamp.
  • Unstable lighting of a lamp is a generally known fact.
  • the output voltage of the electric ballast is set to be a voltage (equal voltage) close to the output voltage while a fluorescent lamp is connected to the electric ballast when the lamp is connected to the electric ballast instead of the fluorescent lamp.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lighting control circuit capable of stably lighting a lamp using a solid-state light-emitting element and saving power even when the lamp using the solid-state light-emitting element is connected to an electric ballast, a lamp and a lighting control method using the lighting control circuit.
  • one embodiment of the present invention provides a lighting control circuit including: a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC to a DC; a series light emitter a plurality of solid-state light-emitting elements is connected in series; a smoothing capacitor provided in parallel with the series light emitter in a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC from an output side of the rectifier; and a switching control circuit configured to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast as a startup voltage in the startup of the series light emitter, and switch the series light emitter to a parallel connector made up of series connection of a plurality of solid-state light-emitting elements after a predetermined time has passed since the startup of the series light emitter.
  • FIG. 1 is a sectional view illustrating an outline of a lighting device having an electric ballast for an existing fluorescent lamp to which a lamp having a solid-state light-emitting element according to an embodiment of the present invention is attached.
  • FIG. 2 is a front view illustrating an external appearance of a lamp which is attachable to the lighting device illustrated in FIG. 1 .
  • FIG. 3 is a connecting diagram of Embodiment 1 of a lighting control circuit of a lamp using the solid-state light-emitting element according to the present invention.
  • FIG. 4 is a view describing a voltage waveform output from a rectifier illustrated in FIG. 3 .
  • FIG. 5 is a connecting diagram of a modified example of the lighting control circuit illustrated in FIG. 3 .
  • FIG. 6 is a connecting diagram of Embodiment 2 of a lighting control circuit of a lamp using the solid-state light-emitting element according to the present invention.
  • FIG. 7 is a connecting diagram of Embodiment 3 of a lighting control circuit of a lamp using the solid-state light-emitting element according to the present invention.
  • FIG. 1 is an external view illustrating an outline of a lighting device including an electric ballast for an existing fluorescent lamp to which a lamp having a solid-state light-emitting clement according to the present invention can be attached.
  • reference number 1 denotes a reflector on which the after-described straight lamp is mounted.
  • the reflector 1 is provided with a pair of sockets 2 to have a space therebetween.
  • a pair of the sockets 2 is provided in both ends of the reflector 1 in the extending direction thereof.
  • the reflector 1 is provided with an existing electric ballast 3 for a fluorescent lamp to which power from a commercial AC source can be supplied.
  • An existing straight fluorescent lamp can be mounted on the lighting device.
  • a straight lamp 4 illustrated in FIG. 2 can be attached instead of the existing straight fluorescent lamp.
  • Both end portions of a straight tube 5 of the lamp 4 are sealed by a pair of caps 6 .
  • a pair of electrode pins 7 a , 7 a constituting a part of a power supply system is provided in each of the caps 6 .
  • a commercial AC source E is connected to the electric ballast 3 .
  • the frequency of the commercial AC source E is, for example, 50 Hz/60 Hz.
  • the output sides of the electric ballast 3 are connected to a pair of sockets 2 .
  • Each of the sockets 2 includes a pair of electrode terminals 2 a , 2 b .
  • a pair of electrode pins 7 a , 7 a is connected to the pair of electrode terminals 2 a , 2 b.
  • a plurality of solid-state light-emitting elements for example, light-emitting diode (LED)
  • a lighting control circuit 11 are provided inside the straight tube 5 .
  • a plurality of solid-state light-emitting elements 8 is connected in series, and constitutes a series light emitter 9 made up of a series connector. In this embodiment, at least three series light emitters 9 are arranged in parallel.
  • the lighting control circuit 11 includes a current supply line 10 , rectifier 12 , smoothing capacitor 13 , timer control circuit 14 , impedance element 15 , and short-circuiting switching element (SW 1 ) 16 .
  • the rectifier 12 is connected to the electric ballast 3 to which power is supplied from the commercial AC source E so as to convert an AC into a DC.
  • the rectifier 12 is made up of a bridge-type full-wave rectifier circuit having rectifier diodes D 1 -D 4 .
  • the input side of each rectifier 12 is connected to a pair of electrode pins 7 a , 7 a .
  • the output side of each rectifier 12 is connected to the electrodes of both ends of the smoothing capacitor 13 .
  • the smoothing capacitor 13 operates to eliminate an AC component included in the DC output from the output side. Both ends of each series light emitter 9 are connected to the electrodes of both ends of the smoothing capacitor 13 parallel through the current supply line 10 .
  • the impedance element 15 is provided in series in the current supply line 10 between the rectifier 12 and the series light emitter 9 .
  • the impedance element 15 operates to generate an output voltage equal to an output voltage from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 as a startup voltage in the startup of the lamp 4 (series light emitter 9 ).
  • a Zener diode (ZD 1 ) is used for the impedance element 15 in this case, but a resistor or an inductor can be used.
  • a short-circuiting switching element 16 is connected to the impedance element 15 in parallel.
  • a semiconductor switching element can be used for the short-circuiting switching element 16 , but a relay switch or a mechanical switch can be used.
  • the timer control circuit 14 operates to set the output voltage from the electric ballast 3 to be lower than the startup voltage by short-circuiting the short-circuiting switching element 16 after at least a predetermined time (corresponding to preheat time of filament of fluorescent lamp) corresponding to an energization time to the filament of the fluorescent lamp has passed since the startup of the lamp 4 .
  • the electric ballast 3 is turned on in response to the turning on of the power source switch SW illustrated in FIG. 3 , and the startup voltage V 1 equal to the output voltage from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 is generated during at least a predetermined time t corresponding to the energization time to the filament of the fluorescent lamp after the startup of the series light emitter 9 as illustrated in FIG. 4 .
  • the timer control circuit 14 closes the short-circuiting switching element 16 after a predetermined time t has passed since the startup.
  • the impedance element 15 is thereby short-circuited, and the output voltage V from the electric ballast 3 is set to be lower than the startup voltage V 1 as illustrated in FIG. 4 .
  • a control step of applying the output voltage equal to the output voltage V 1 from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 to the series light emitter 9 in the startup of the series light emitter 9 and a control step of setting the output voltage V from the electric ballast 3 to be lower than the startup voltage V 1 after at least a predetermined time t corresponding to the energisation time to the filament of the fluorescent lamp has passed since the startup of the series light emitter 9 are executed.
  • the smoothing capacitor 13 is electrically connected to the series light emitter 9 in parallel
  • the impedance element 15 is provided in the current supply line 10 which supplies a current to the series light emitter 9
  • the short-circuiting switching element 16 is provided in the impedance element 15 in parallel.
  • the lamp 4 starts up by using the output voltage V of the electric ballast 3 , which is close to the voltage of the fluorescent lamp, in the startup of the lamp 4 , and the output voltage V of the electric ballast 3 is set to be lower than the startup voltage V 1 after the stabilization of the operation of the lamp 4 . Therefore, the lamp 4 using the solid-state light-emitting element 8 can be stably lighted, and lower power consumption can be achieved.
  • a time slightly longer than a time slightly longer than a time from the energization start to the filament of the fluorescent lamp to the energization stop to the filament (preheat time: time required for lighting after fluorescent lamp starts discharging) as the predetermined time in order to stably light the solid-state light-emitting element 8 .
  • the impedance element 15 is provided in series in the current supply line 10 between the rectifier 12 and the series light emitter 9 .
  • the impedance element 15 can be provided between the electric ballast 3 and the rectifier 12 .
  • the other configurations and operations of the modified example are similar to those in Embodiment 1; thus, the detailed description thereof will be omitted with only reference numbers being illustrated.
  • FIG. 6 is a connecting diagram of Embodiment 2 of a lighting control circuit of a lamp using a solid-state light-emitting element according to the present invention.
  • the short-circuiting switching element 16 is provided in the current supply line 10 between the smoothing capacitor 13 and the series light emitter 9 .
  • the short-circuiting switching element 16 opens (open condition) in the startup of the series light emitter 9 and is closed (closed condition) after at least a predetermined time t has passed since the startup of the series light emitter 9 , so as to generate the output voltage equal to the output voltage from the electric ballast 3 when a fluorescent lamp stalls up upon the connection of the fluorescent lamp to the electric ballast 3 as the startup voltage V 1 in the startup of the series light emitter 9 .
  • the impedance element can be appropriately provided between the rectifier 12 and the smoothing capacitor 13 , the rectifier 12 and the series light emitter 9 , or the like.
  • the tuner control circuit 14 operates to close the short-circuiting switching element 16 after at least a predetermined time t corresponding to the energization time to the filament of the fluorescent lamp has passed since the startup of the series light emitter 9 .
  • the output voltage from the electric ballast 3 is thereby lowered.
  • a control step of applying the output voltage V 1 equal to the output voltage from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 by maintaining the short-circuiting switching element 16 in the open condition during the predetermined time t after the startup, and a control step of setting the output voltage V from the electric ballast 3 to be lower than the startup voltage V 1 after the predetermined time t has passed are executed.
  • the effects similar to those in Embodiment 1 can be therefore obtained.
  • FIG. 7 is a connecting diagram of Embodiment 3 of a lighting control circuit of a lamp using a solid-state light-emitting element according to the present invention.
  • the series light emitter 9 in order to generate a startup voltage equal to the output voltage from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 in the startup of the lamp 4 , the series light emitter 9 includes a series connector in which 42 solid-state light-emitting elements 8 are connected in series. In this embodiment, 3 series connectors are provided in parallel. However, only one series light emitter 9 is illustrated in FIG. 7 in order to simply the illustration.
  • the lamp 4 is provided with a switching circuit 17 , which sets the output voltage V from the electric ballast 3 to be lower than the startup voltage V 1 by switching the series light emitter 9 to a parallel connector 9 ′ having a plurality of solid-state light-emitting elements 8 after at least a predetermined time t corresponding to the energization time to the filament of the fluorescent lamp has passed since the startup of the series light emitter 9 .
  • the parallel connector 9 ′ includes a series connector having 21 solid-state light-emitting elements 8 .
  • the switching circuit 17 includes a timer circuit 17 a , relay switch circuit 17 b , and power stabilization circuit 17 c which supplies stable voltage to the timer circuit 17 a and the relay switch circuit 17 b.
  • the relay switch circuit 17 b includes a conducting coil 18 , back-flow prevention diode 19 in parallel with the conducting coil 18 , moving contacts TW 1 , TW 2 , and fixed contacts T 1 -T 4 .
  • the series light emitter 9 is provided with back-flow prevention diodes 20 , 21 , 22 which prevent the back flow of the conducting current when switching the series connector having 42 solid-state light-emitting elements 8 to the parallel connector 9 ′ having 21 solid-state light-emitting elements 8 .
  • the current supply line 10 is provided with resistors R 1 , R 2 and a varistor Ba in parallel with the smoothing capacitor 13 in view of the circuit design.
  • resistors R 1 , R 2 and a varistor Ba in parallel with the smoothing capacitor 13 in view of the circuit design.
  • these are not essential for the present invention.
  • the relay contact TW 1 is connected to the fixed contact T 3 and the relay contact TW 2 is connected to the fixed contact T 1 in order to generate the startup voltage equal to the output voltage from the electric ballast 3 when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast 3 in the startup of the lamp 4 .
  • Current i therefore flows in the 42 solid-state light-emitting elements 8 as illustrated by the solid-state line.
  • the startup voltage V 1 is thereby applied to the series light emitter 9 from the electric ballast 3 .
  • the switching control circuit 17 switches the relay contact TW 1 to the fixed contact T 4 as illustrated by the dashed line, and switches the relay contact TW 2 to the fixed contact T 2 as illustrated by the dashed line after a predetermined time t has passed since the startup of the lamp 4 .
  • the current i flows in the parallel connector 9 ′ made up of the series connection of the 21 solid-state light-emitting elements 8 as illustrated by the dashed line, and the output voltage V from the electric ballast 3 is set to be below the startup voltage V 1 after at least a predetermined time t corresponding to the energization time to the filament of the fluorescent lamp has passed since the startup of the series light emitter 9 .
  • a control step of switching the connection condition of the series light emitter 9 from the series connection condition to the parallel connection condition made up of the series connection of the solid-state light-emitting element after at least a predetermined time t corresponding to the energization time to the filament of the fluorescent lamp has passed since the startup of the series light emitter 9 is executed.
  • the lamp thereby starts up by using the output voltage of the electric ballast, which is close to that of a fluorescent lamp, in the startup, and the output voltage of the electric ballast is lowered after the stabilization of the operation of the lamp, so that the lamp using the solid-state light-emitting elements can be stably lighted, and a lower power consumption can be achieved.
  • the lamp starts up by using the output voltage from the electric ballast, which is close to a voltage of a fluorescent lamp, and the output voltage of the electric ballast is lowered after the stabilization of the operation of the lamp.
  • the lamp using a solid-state light-emitting element can be stably lighted, and low power consumption can be achieved.
  • a lighting control circuit includes a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC into a DC; a series light emitter made up of a series connector including a plurality of solid-state light-emitting elements; a smoothing capacitor provided in parallel with the series light emitter in a current supply line from the electric ballast to the series light emitter which is a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC output from an output side of the rectifier; an impedance element configured to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent lamp starts up upon connection of the fluorescent lamp to the electric ballast as a startup voltage in startup of the series light emitter; a short-circuiting switching element provided in parallel with the impedance element; and a timer control circuit configured to short-circuit the short-circuiting switching element after a predetermined time has passed since the startup of the series light emitter
  • the impedance element is provided in series in the current supply line between the rectifier and the series light emitter.
  • the impedance element is provided between the electric ballast and the rectifier.
  • the impedance element is a Zener diode, a resistor, or an inductor.
  • the short-circuiting switching element is a semiconductor switching element.
  • a lighting control circuit includes a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC to a DC; a series light emitter made up of a series connector including a plurality of solid-state light-emitting elements; a smoothing capacitor provided in parallel with the series light emitter in a current supply line from the electric ballast to the series light emitter which is a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC output from an output side of the rectifier; a short-circuiting switching element provided in the current supply line, and configured to open in startup and to be closed after a predetermined time has passed since the startup of the series light emitter, so as to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent light starts up upon the connection of the fluorescent light to the electric ballast as a startup voltage in the startup of the series light emitter; and a timer control circuit configured to change the short-circuit
  • the short-circuiting switching element is provided in series in the current supply line between the rectifier and the series light emitter.
  • the short-circuiting switching element is provided between the electric ballast and the rectifier.
  • a lamp includes a straight tube, both ends of which are sealed by a cap having a pair of electrode pins, the straight tube including inside thereof: a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC into a DC; a series light emitter made up of a series connector including a plurality of solid-state light-emitting elements; a smoothing capacitor provided in parallel with the series light emitter in a current supply line from the electric ballast to the series light emitter which is a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC output from an output side of the rectifier; an impedance element configured to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent lamp starts up upon connection of the fluorescent lamp to the electric ballast as a startup voltage in startup of the series light emitter; a short-circuiting switching element provided in parallel with the impedance element; and a timer control circuit configured to
  • a lamp includes a straight tube, both ends of which are sealed by a cap having a pair of electrode pins, the straight tube including inside thereof: a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC to a DC; a series light emitter made up of a series connector including a plurality of solid-state light-emitting elements; a smoothing capacitor provided in parallel with the series light emitter in a current supply line from the electric ballast to the series light emitter which is a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC output from an output side of the rectifier; a short-circuiting switching element provided in the current supply line, and configured to open in startup and to be closed after a predetermined time has passed since the startup of the series light emitter, so as to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent light starts up upon the connection of the fluorescent light to the electric ballast as

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
US14/013,455 2012-08-31 2013-08-29 Lighting control circuit, lamp, and lighting control method using the lighting control circuit Active 2034-04-25 US9271350B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012191133A JP6007680B2 (ja) 2012-08-31 2012-08-31 点灯制御回路及びその点灯制御回路を用いた照明灯及び点灯制御回路の制御方法
JP2012-191133 2012-08-31

Publications (2)

Publication Number Publication Date
US20140062320A1 US20140062320A1 (en) 2014-03-06
US9271350B2 true US9271350B2 (en) 2016-02-23

Family

ID=50186558

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/013,455 Active 2034-04-25 US9271350B2 (en) 2012-08-31 2013-08-29 Lighting control circuit, lamp, and lighting control method using the lighting control circuit

Country Status (2)

Country Link
US (1) US9271350B2 (ja)
JP (1) JP6007680B2 (ja)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9497821B2 (en) 2005-08-08 2016-11-15 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US11131431B2 (en) 2014-09-28 2021-09-28 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US9794990B2 (en) * 2014-09-28 2017-10-17 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp with improved compatibility with an electrical ballast
US10021742B2 (en) 2014-09-28 2018-07-10 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US9781805B2 (en) 2015-03-10 2017-10-03 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
WO2015157906A1 (zh) * 2014-04-15 2015-10-22 邓树兴 利用荧光灯电子镇流器驱动的led日光灯管和照明灯具
JP2015216612A (ja) * 2014-05-09 2015-12-03 正雄 佐藤 ３ダイオ・定電圧ダイオード組み合わせ器。
US10845008B2 (en) 2014-09-28 2020-11-24 Zhejiang Super Lighting Electric Appliance Co., Ltd. LED filament and LED light bulb
US10560989B2 (en) 2014-09-28 2020-02-11 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
CN205213093U (zh) 2014-09-28 2016-05-04 嘉兴山蒲照明电器有限公司 整流滤波电路、灯及led直管灯
US10208898B2 (en) 2015-04-29 2019-02-19 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp with operating modes compatible with electrical ballasts
US9557044B2 (en) 2014-10-20 2017-01-31 Energy Focus, Inc. LED lamp with dual mode operation
JP2016085813A (ja) 2014-10-23 2016-05-19 株式会社リコー 照明灯および照明装置
US10514134B2 (en) 2014-12-05 2019-12-24 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US9860959B2 (en) 2015-02-15 2018-01-02 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp compatible with different sources of external driving signal
US9897265B2 (en) 2015-03-10 2018-02-20 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp having LED light strip
US9867239B2 (en) 2015-03-10 2018-01-09 Jiaxing Super Lighting Electric Appliance Co., Ltd. Light emiting diode (LED) tube lamp capable of adapting to different driving environments
US10197225B2 (en) 2015-03-10 2019-02-05 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
US9826585B2 (en) 2015-03-10 2017-11-21 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
US11028973B2 (en) 2015-03-10 2021-06-08 Jiaxing Super Lighting Electric Appliance Co., Ltd. Led tube lamp
US9903577B2 (en) 2015-03-10 2018-02-27 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp including light strip including a pad and an opening formed on the pad
US11519565B2 (en) 2015-03-10 2022-12-06 Jiaxing Super Lighting Electric Appliance Co., Ltd LED lamp and its power source module
US9750096B2 (en) 2015-03-25 2017-08-29 Jiaxing Super Lighting Electric Appliance Co., Ltd. Dual-Mode LED tube lamp
US9913336B2 (en) 2015-04-03 2018-03-06 Jiaxing Super Lighting Electric Appliance Co., Ltd. Light emiting diode (LED) tube lamp compatible with different ballasts providing external driving signal
US10070498B2 (en) 2015-04-14 2018-09-04 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp with improved compatibility with electrical ballasts
JP6011676B1 (ja) * 2015-04-30 2016-10-19 株式会社リコー 照明灯、照明装置、及び点灯制御回路
US11035526B2 (en) 2015-12-09 2021-06-15 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
CN105916261A (zh) * 2016-07-06 2016-08-31 苏州东山精密制造股份有限公司 一种照明及驱动电路
US10136482B1 (en) 2018-01-23 2018-11-20 Philips Lighting Holding B.V. Lighting driver, lighting system and control method

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10105256A (ja) * 1996-09-30 1998-04-24 Toshiba Lighting & Technol Corp スイッチ電源、電子回路、照明装置およびｏａ機器
JP2008078410A (ja) 2006-09-21 2008-04-03 Sharp Corp バックライト装置、及びこれを用いた表示装置
JP2008277188A (ja) 2007-05-01 2008-11-13 Sharp Corp Ｌｅｄ照明灯及び該ｌｅｄ照明灯を用いた灯器具
JP2010092990A (ja) 2008-10-06 2010-04-22 N-Hitech Co Ltd Ｌｅｄ蛍光灯
JP2010244771A (ja) 2009-04-03 2010-10-28 Mitsubishi Electric Corp 電源回路及び照明装置
JP2011034847A (ja) 2009-08-03 2011-02-17 Toshiba Lighting & Technology Corp 電源装置及び照明器具
US20110057572A1 (en) * 2009-09-08 2011-03-10 Denovo Lighting, L.L.C. Voltage regulating devices in LED lamps with multiple power sources
JP2011100668A (ja) * 2009-11-06 2011-05-19 Phoenix Electric Co Ltd Ｌｅｄ用電源回路
US20110260614A1 (en) * 2010-04-23 2011-10-27 Teknoware Oy Led tube and lamp arrangement
JP2011243331A (ja) * 2010-05-14 2011-12-01 Fkk Co Ltd Ｌｅｄ電源回路
JP2012053144A (ja) 2010-08-31 2012-03-15 Ricoh Co Ltd ビデオカメラ装置
JP2012094356A (ja) 2010-10-27 2012-05-17 Toshiba Lighting & Technology Corp Ｌｅｄ点灯装置およびｌｅｄ照明装置
US20140084793A1 (en) * 2011-05-19 2014-03-27 Kumho Electric Co., Ltd. Led flourescent lamp
US20140152184A1 (en) * 2011-07-06 2014-06-05 Hisashi Tomiyama Lighting control circuit, illuminating lamp using the lighting control circuit, and lighting device using the illuminating lamp
US20140159592A1 (en) * 2012-12-11 2014-06-12 Luxul Technology Incorporation Led light tube compatible with light fixture having electronic ballast or magnetic ballast
US20140197748A1 (en) * 2013-01-15 2014-07-17 Luxul Technology Incorporation LED Lighting Tube
US20140204571A1 (en) * 2013-01-24 2014-07-24 Cree, Inc. Led lighting apparatus for use with ac-output lighting ballasts
US20140203716A1 (en) * 2011-08-15 2014-07-24 Koninklijke Philips N.V. Electronic ballast-compatible lighting driver for light-emitting diode lamp
US20140265900A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Fluorescent Lamp LED Replacement
US20140265899A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Linear LED Driver
US20140265901A1 (en) * 2011-10-20 2014-09-18 Koninklijke Philips N.V. Driver for connecting led to electronic ballast
US20150061542A1 (en) * 2012-06-15 2015-03-05 Lightel Technologies, Inc. Linear Solid-State Lighting With Ballast Free Of Electric Shock Hazard

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11135274A (ja) * 1997-10-30 1999-05-21 Toshiba Tec Corp Ｌｅｄ照明装置
JP4037857B2 (ja) * 2004-09-28 2008-01-23 有限会社タック リサーチ Ｌｅｄ照光装置
JP2012084507A (ja) * 2010-09-18 2012-04-26 Toshiba Lighting & Technology Corp 電流制限回路、ｌｅｄモジュールおよびｌｅｄ照明装置

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10105256A (ja) * 1996-09-30 1998-04-24 Toshiba Lighting & Technol Corp スイッチ電源、電子回路、照明装置およびｏａ機器
JP2008078410A (ja) 2006-09-21 2008-04-03 Sharp Corp バックライト装置、及びこれを用いた表示装置
JP2008277188A (ja) 2007-05-01 2008-11-13 Sharp Corp Ｌｅｄ照明灯及び該ｌｅｄ照明灯を用いた灯器具
JP2010092990A (ja) 2008-10-06 2010-04-22 N-Hitech Co Ltd Ｌｅｄ蛍光灯
JP2010244771A (ja) 2009-04-03 2010-10-28 Mitsubishi Electric Corp 電源回路及び照明装置
JP2011034847A (ja) 2009-08-03 2011-02-17 Toshiba Lighting & Technology Corp 電源装置及び照明器具
US20110057572A1 (en) * 2009-09-08 2011-03-10 Denovo Lighting, L.L.C. Voltage regulating devices in LED lamps with multiple power sources
JP2011100668A (ja) * 2009-11-06 2011-05-19 Phoenix Electric Co Ltd Ｌｅｄ用電源回路
US20110260614A1 (en) * 2010-04-23 2011-10-27 Teknoware Oy Led tube and lamp arrangement
JP2011243331A (ja) * 2010-05-14 2011-12-01 Fkk Co Ltd Ｌｅｄ電源回路
JP2012053144A (ja) 2010-08-31 2012-03-15 Ricoh Co Ltd ビデオカメラ装置
JP2012094356A (ja) 2010-10-27 2012-05-17 Toshiba Lighting & Technology Corp Ｌｅｄ点灯装置およびｌｅｄ照明装置
US20140084793A1 (en) * 2011-05-19 2014-03-27 Kumho Electric Co., Ltd. Led flourescent lamp
US20140152184A1 (en) * 2011-07-06 2014-06-05 Hisashi Tomiyama Lighting control circuit, illuminating lamp using the lighting control circuit, and lighting device using the illuminating lamp
US20140203716A1 (en) * 2011-08-15 2014-07-24 Koninklijke Philips N.V. Electronic ballast-compatible lighting driver for light-emitting diode lamp
US20140265901A1 (en) * 2011-10-20 2014-09-18 Koninklijke Philips N.V. Driver for connecting led to electronic ballast
US20150061542A1 (en) * 2012-06-15 2015-03-05 Lightel Technologies, Inc. Linear Solid-State Lighting With Ballast Free Of Electric Shock Hazard
US20140159592A1 (en) * 2012-12-11 2014-06-12 Luxul Technology Incorporation Led light tube compatible with light fixture having electronic ballast or magnetic ballast
US20140197748A1 (en) * 2013-01-15 2014-07-17 Luxul Technology Incorporation LED Lighting Tube
US20140204571A1 (en) * 2013-01-24 2014-07-24 Cree, Inc. Led lighting apparatus for use with ac-output lighting ballasts
US20140265900A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Fluorescent Lamp LED Replacement
US20140265899A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Linear LED Driver

Also Published As

Publication number Publication date
JP6007680B2 (ja) 2016-10-12
JP2014049283A (ja) 2014-03-17
US20140062320A1 (en) 2014-03-06

Similar Documents

Publication Publication Date Title
US9271350B2 (en) Lighting control circuit, lamp, and lighting control method using the lighting control circuit
US8749140B2 (en) Light emitting apparatus
JP6293729B2 (ja) ランプ装置、及びランプ装置を動作させる方法
JP2014049283A5 (ja)
US9282599B2 (en) Light-emitting diode lamp compatible with an electronic ballast generating preheating current
JP5379922B2 (ja) Ｌｅｄ点灯装置及びそれを用いた照明器具
TWI596986B (zh) Dimming device
JP2015156382A (ja) Ｌｅｄ照明
JP6489473B2 (ja) 電源装置及び照明装置
JP2017513184A5 (ja)
US8564222B2 (en) Lighting device controlling circuit module
JP2016167383A (ja) 点灯回路、照明器具及び照明システム
US9018848B2 (en) Method of powering flashlight tailcaps
JP6206814B2 (ja) 点灯装置および該点灯装置を用いた照明システム
CN218570514U (zh) 一种led灯及误用警示模块
WO2018120835A1 (zh) Led灯
JP6179648B2 (ja) 点灯制御回路及びその点灯制御回路を用いた照明灯
JP6396793B2 (ja) スイッチング電源回路
JP6358526B2 (ja) 点灯装置および、これを用いた照明器具
JP6970839B2 (ja) レトロフィットｌｅｄランプ
JP5750592B2 (ja) 照明装置及び該照明装置を用いた照明器具
CN108882429B (zh) 点灯装置以及照明系统
JP2013175455A (ja) Ｌｅｄ蛍光灯
JP6011676B1 (ja) 照明灯、照明装置、及び点灯制御回路
JP5385815B2 (ja) 点灯装置及びそれを用いた照明器具

Legal Events

Date Code Title Description
AS Assignment

Owner name: RICOH COMPANY, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:URANO, MASAHARU;NAKASHIMA, HIDEFUMI;HAGIWARA, SHIGEMI;REEL/FRAME:031237/0017

Effective date: 20130823

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8