Connect public, paid and private patent data with Google Patents Public Datasets

Led lighting device and a method to verify its lifespan

Download PDF

Info

Publication number
US20140218039A1
US20140218039A1 US14250871 US201414250871A US20140218039A1 US 20140218039 A1 US20140218039 A1 US 20140218039A1 US 14250871 US14250871 US 14250871 US 201414250871 A US201414250871 A US 201414250871A US 20140218039 A1 US20140218039 A1 US 20140218039A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
led
device
lighting
light
controller
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.)
Pending
Application number
US14250871
Inventor
Jingxiang Shen
Fang Chen
Yehua Wan
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.)
Zhejiang Shenghui Lighting Co Ltd
Original Assignee
Zhejiang Shenghui Lighting 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

Links

Images

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials
    • H05B33/0884Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with monitoring or protection
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control
    • H05B33/0845Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the light intensity
    • H05B33/0848Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the light intensity involving load characteristic sensing means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials
    • H05B33/0884Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with monitoring or protection
    • H05B33/089Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with monitoring or protection of the load stage

Abstract

The present invention provides an LED lighting device and a method for verifying the device's lifespan. The LED lighting device includes multiple LED light sources, a controller configured to keep time for the LED lighting device's lifespan; a low voltage DC power source configured to supply power; a light intensity sensor configured to capture illuminance data; and a display terminal configured to display received data. Further, the controller records time keeping data based on the illuminance data captured by the light intensity sensor and sends the time keeping data to be displayed on the display terminal.

Description

    CROSS-REFERENCES TO RELATED APPLICATIONS
  • [0001]
    This application is a continuation in part and claims the priority of Chinese Patent Application No. 201210292622.7 (PCT/CN2012086612) filed on Aug. 16, 2012, the entire content of which is incorporated herein by reference.
  • FIELD OF THE DISCLOSURE
  • [0002]
    The present disclosure relates to the field of light emitting diode (LED) technologies and, more particularly, relates to an LED lighting device that is capable of tracking or monitoring its own lifespan, and relates to a method for verifying the lifespan of the LED lighting device.
  • BACKGROUND
  • [0003]
    With the rapid development of new energy-efficient lighting technologies, especially the LED technology, lighting products have become more efficient and durable. Compared with traditional incandescent lamps, the light conversion efficiency of an LED lamp may be 5 to 10 times higher, and the lifespan of an LED lamp may be 30 to 50 times longer. As a result, energy saving improvements have been well received by commercial and individual users. Moreover, innovative financing methods used in energy-saving projects, such as the Energy Management Contract (EMC) mode, attract more and more attention.
  • [0004]
    New lighting products such as LEDs have very long lifespans in theory. The lifespan of a lighting product may be defined as the duration during which its light intensity is maintained at, for example, above 70% of the original light intensity. Because there is no practical method to speed up the aging process to measure the lifespan of an LED lighting device, one conventional method is to measure a device's light intensity after 6,000 hours' aging to estimate its lifespan. Due to the rapid development of new energy-efficient LED technologies, one technology may become obsolete even before its product's lifespan can be fully tested. For LED manufacturers, this long test time span may cause problems. On the other hand, for LED device users, unless a device consistently fails in a relatively short time, it may be difficult to measure the real lifespan of a device. It may even be harder to compare the lifespan measurements to the claimed lifespan of a lighting product. For example, one product may claim that it has a lifespan of 25,000 hours. If it failed after 20,000 hours of usage, it would be difficult for the user to show a shorter than claimed lifespan.
  • [0005]
    As a result, estimating and verifying the lifespan of the new energy-efficient LED devices may be a challenge to device manufacturers and users. The disclosed method and system are directed to solve one or more problems set forth above and other problems
  • BRIEF SUMMARY OF THE DISCLOSURE
  • [0006]
    One aspect of the present disclosure provides an LED lighting device that is capable of measuring its own lifespan. The LED lighting device may include a controller configured to keep time for the LED lighting device's lifespan; a low voltage DC power source configured to supply power; a light intensity sensor configured to capture illuminance data; and a display terminal configured to be connected to the controller. Further, the controller may record time keeping data based on the illuminance data captured by the light intensity sensor and send the time keeping data to be displayed on the display terminal.
  • [0007]
    Further, the low voltage DC power source may be connected to the controller. The controller may be a microcontroller or a digital integrated circuit controller. The controller may be connected directly to the display terminal. The display terminal may be placed on the LED lighting device, and the controller may store or send time keeping measurements to the display terminal. The controller includes an internal timing circuit or a timing program.
  • [0008]
    In addition, the light intensity sensor may be placed at the luminous zone of the LED lighting device. The controller may capture the illuminance data and convert it into the luminous flux and the luminous flux maintenance factor. The light intensity sensor may be fixed on a substrate/PCB board, which is also used to hold the LED light source. The light intensity sensor may be placed at the center of the substrate/PCB board.
  • [0009]
    Moreover, the LED lighting device may include a cup that is placed outside the light intensity sensor and a shading slide that is placed above the light intensity sensor and on top of the LED lampshade.
  • [0010]
    Another aspect of the present disclosure provides a method for verifying the lifespan of an LED lighting device. The method includes placing a controller and a low voltage DC power source inside the LED lighting device; measuring the LED lighting device's lifespan based on illuminance data related to the LED lighting device; transferring data related to the LED lighting device's lifespan to a display terminal; and displaying the date related to the LED lighting device's lifespan in real time.
  • [0011]
    The method for verifying the lifespan of the LED lighting device may further include recording the illuminance data related to the LED lighting device at pre-set time intervals; transferring the illuminance data related to the LED lighting device to the controller; converting the illuminance data into a luminous flux and a luminous flux maintenance factor; and sending the luminous flux and a luminous flux maintenance factor to the display terminal.
  • [0012]
    Moreover, the method may include adding the pre-set interval of time to the lifespan of the LED lighting device when the measured luminous flux maintenance factor is less than a pre-defined value; and measuring an initial light intensity value after the LED device is powered on for 20 to 60 minutes; and measuring another 3 to 5 consequent light intensity values at a time interval of every 20 to 30 minutes.
  • [0013]
    In addition, the method for verifying the lifespan of the LED lighting device may include comparing the measured light intensity data to an initial light intensity value to determine a variance; and resetting the initial illuminance value if the variance is less than 10%. Further, the controller and the display terminal may be connected to an external low voltage DC power source.
  • [0014]
    Another aspect of the present disclosure provides a system for verifying the lifespan of an LED lighting device. The system may include an LED lighting device with one or more LED light sources; a controller configured to keep time of the LED lighting device lifespan; a light intensity sensor configured to capture illuminance data; and a display terminal configured to be attached to the LED lighting device. The controller may record time keeping data based on the illuminance data captured by the light intensity sensor and send the time keeping data to be displayed on the display terminal. In addition, the system may include a temperature sensor configured to capture the temperature of an LED light source, wherein the display terminal further displays temperature data related to the lifespan of the LED lighting device.
  • [0015]
    Embodiments consistent with the present disclosure enable the user to monitor and manage the lifespans of LED lighting devices in real time.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0016]
    The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present disclosure.
  • [0017]
    FIG. 1 depicts an exemplary LED lighting device configuration consistent with various disclosed embodiments;
  • [0018]
    FIG. 2 depicts a schematic diagram of an exemplary micro controller unit (MCU) controller and power supply configuration consistent with various disclosed embodiments; and
  • [0019]
    FIG. 3 is a schematic illustrating an exemplary controller module in the LED lighting device consistent with various disclosed embodiments.
  • DETAILED DESCRIPTION
  • [0020]
    Reference will now be made in detail to exemplary embodiments of the invention, which are illustrated in the accompanying drawings. Hereinafter, embodiments consistent with the disclosure will be described with reference to drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. It is apparent that the described embodiments are some but not all of the embodiments of the present invention. Based on the disclosed embodiment, persons of ordinary skill in the art may derive other embodiments consistent with the present disclosure, all of which are within the scope of the present invention.
  • [0021]
    An exemplary embodiment consistent with the present disclosure is described below. FIG. 1 illustrates an exemplary embodiment consistent with the present disclosure. The embodiment includes a substrate/PCB board 1, a lampshade 2, multiple LED light sources 3, a controller 4, a lower voltage DC power supply 6, a display terminal 7, a light intensity sensor 8, a cup 9, and a shading slide 10.
  • [0022]
    As shown in FIG. 1, the substrate/PCB board 1 and the lampshade 2 may be arranged at the upper portion of the LED lighting device. The LED light sources 3 may be fixed on the substrate/PCB board 1. The controller 4 and the low voltage DC power source 6 may be placed inside the LED lighting device. The controller 4 may be an MCU controller. Further, as shown in FIG. 1, the low voltage DC power supply 6 may be connected to the controller 4. The controller 4 may be connected to a display terminal 7. The display terminal 7 may be placed on the side of the LED lighting device, and may be an LCD display. In one embodiment, the light intensity sensor 8 may be placed at the luminous zone inside the LED lighting device. The light intensity sensor 8 may be connected to the controller 4. The light intensity sensor 8 may measure the illuminance of the LED lighting device. The controller 4 may read and convert the illuminance data from the sensor into the luminous flux maintenance factor, and may send the data to the display terminal 7. The light intensity sensor 8 may be placed at the center of the substrate/PCB board 1. The cup 9 may be set outside the light intensity sensor 8 to shield direct light from the LED light sources 3. A shading slide 10 may be placed above the light intensity sensor 8 and on top of the cup 9 to shade the sensor 8 from direct external light. One or more shading slides 10 may be placed at different positions of an LED device to shield light from undesirable light sources that may interfere with the readings of the sensor 8 (e.g., external light).
  • [0023]
    Depending on the configuration of the LED lighting device, the light intensity sensor 8 may be placed at different positions with various affiliated structures (e.g., cup 9 and shading slide 10) to properly measure the light intensity of the device. Further, multiple light intensity sensors 8 may be place in the LED lighting device to provide more accurate readings of the illuminance or provide back-up coverage. For example, for a more accurate illuminance reading, an LED lighting device may place two sensors in the device and use the average of the two sensors' readings as the measured illuminance value.
  • [0024]
    The controller 4 may need a low voltage DC power supply. Often, the LED power supply can also output low voltage DC power. For example, the low voltage DC power source 6 may supply power to the controller 4 directly. If other types of power source are used, as shown in FIG. 2, an AC-DC module and a DC-DC module may be needed for voltage conversions.
  • [0025]
    When the power is on, the LED light sources 3 may start emitting light. At the same time, the controller 4 may start keeping time. The lifespan time data may be displayed on the display terminal 7 in real time. The controller 4 may have a data protection function, which may keep track of the time data during a power-off period. When the power is turned on again, the controller 4 may resume time keeping. The time keeping functions may keep running until the LED light sources 3 cannot emit sufficient light. The final recorded and displayed duration may be the lifespan of the LED lighting device.
  • [0026]
    In one embodiment, the light intensity sensor 8 may take a first light intensity measurement 30 minutes after the LED lighting device is powered on. Then, the sensor may take another three consequent light intensity measurements every 30 minutes. The light intensity measurements may then be compared with an initial light intensity value, which may be provided by the LED manufacturer. If the variance is within 10%, the controller 4 may set the average of these measurements as the initial illuminance value. The sensor 8 may also send this initial illuminance value to the MCU controller 4. Thereafter, the light intensity sensor 8 may measure light intensity every 30 minutes. In some embodiments, the light intensity sensor 8 may be configured to not take the light intensity readings during the power-off processes.
  • [0027]
    As shown in FIG. 3 the MCU controller 4 may include an oscillating circuit and a reset circuit that may be used to implement the time keeping functions. Further, the MCU controller 4 may be connected to a lower voltage DC power supply 6, the light intensity sensor 8, and the display terminal 7. The controller 4 may retrieve the illuminance measurements from the light intensity sensor 8, compare the data with the initial illuminance value, convert the illuminance measurement data into the luminous flux and the luminous flux maintenance factor, and send the luminous flux and the luminous flux maintenance factor to the display terminal 7 in real time.
  • [0028]
    In one embodiment, when the measured luminous flux maintenance factor is lower than a pre-defined value, the recorded working time by the LED lighting device may be its lifespan. The pre-defined value may be defined based on specific applications. For example, the luminous flux maintenance factor threshold may be set at 70%. For different type of LED lighting devices, the threshold values may be different.
  • [0029]
    Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the claims.
  • INDUSTRIAL APPLICABILITY AND ADVANTAGEOUS EFFECTS
  • [0030]
    Without limiting the scope of any claim and/or the specification, examples of industrial applicability and certain advantageous effects of the disclosed embodiments are listed for illustrative purposes. Various alternations, modifications, or equivalents to the technical solutions of the disclosed embodiments can be obvious to those skilled in the art and can be included in this disclosure.
  • [0031]
    In some embodiments consistent with the present disclosure, other than the light intensity sensors, other sensors may be attached to an LED lighting device to measure other environmental conditions, such as humidity, temperature, etc. The environmental data may also be sent to the controller. The controller may keep track of various environmental conditions, and keep track of the device operation time for these conditions. For example, if an LED lighting device has a 2,000-hour lifespan, the controller may generate data showing that 500 of the 2,000 hours were in a raining environment, 800 of the 2,000 hours were below the freezing temperature, etc. The display terminal may also display lifespan information in combination with environmental information in real time.
  • [0032]
    In some embodiments consistent with the present disclosure, sensors may be place next to or may be attached to the LED light sources to measure the temperature of the light sources. The controller may receive the temperature data and keep track of the operation time for various temperature ranges. For example, for an LED device with a 2,000-hour lifespan, the controller may generate data showing the temperature readings for the 2,000 operational hours.
  • [0033]
    In other embodiments consistent with the present disclosure, an LED lighting device manufacturer may place a wireless communication module in the LED lighting device. The controller may then send data related to the lifespan data of the LED lighting device through the wireless communication module to other software/hardware modules. For example, the controller may use the wireless module to send the device operation data to an LED lighting device management system. The device management system may then display the data through any type of user interfaces, including an online user interface. The user may then monitor the status of the LED lighting devices remotely to determine whether certain devices need to be replaced or repaired. This type of remote device monitoring can also be used in combination with the on-site monitoring (e.g., through a display terminal on the LED lighting device) to monitor and manage LED lighting devices as needed.
  • [0034]
    Embodiments consistent with the present disclosure may use one or multiple sensors to measure light intensity, LED operational conditions, and LED device operational conditions. The controller may keep track of the lifespan data as well as other measures related to operations of the LED lighting device. The controller may send the data related to the LED operations and other conditions to the display terminal to be displayed.

Claims (20)

What is claimed is:
1. An LED lighting device, comprising:
a controller configured to keep time to measure the LED lighting device's lifespan;
a low voltage DC power source configured to supply power;
a light intensity sensor configured to capture illuminance data;
a display terminal configured to display received data;
wherein the controller records time keeping data based on the illuminance data captured by the light intensity sensor and sends the time keeping data to be displayed on the display terminal.
2. The LED lighting device according to claim 1, wherein the low voltage DC power source is connected to the controller.
3. The LED lighting device according to claim 2, wherein the controller is a microcontroller or a digital integrated circuit controller.
4. The LED lighting device according to claim 3, wherein the controller is connected directly to the display terminal.
5. The LED lighting device according to claim 4, wherein the display terminal is attached to the LED lighting device.
6. The LED lighting device according to claim 1, wherein the light intensity sensor is placed at a luminous zone of the LED lighting device; and the controller captures the illuminance data and converts the data into a luminous flux and a luminous flux maintenance factor.
7. The LED lighting device according to claim 6, wherein the light intensity sensor is fixed on a substrate/PCB board that is also used to hold LED light sources.
8. The LED lighting device according to claim 7, wherein the light intensity sensor is placed at the center of the substrate/PCB board.
9. The LED lighting device according to claim 6, further comprising:
a cup configured to be placed outside the light intensity sensor.
10. The LED lighting device according to claim 9, further comprising:
a shading slide configured to be placed above the light intensity sensor and on top of a LED lampshade.
11. The LED lighting device according to claim 10, wherein the controller includes an internal timing circuit or a timing program.
12. A method for verifying the lifespan of an LED lighting device, comprising:
placing a controller and a low voltage DC power source inside the LED lighting device;
capturing illuminance data related to the LED lighting device;
measuring the LED lighting device's lifespan based on the illuminance data related to the LED lighting device;
transferring data related to the LED lighting device's lifespan to a display terminal; and
displaying the data related to the LED lighting device's lifespan in real time.
13. The method for verifying the lifespan of the LED lighting device according to claim 12, further comprising:
recording the illuminance data related to the LED lighting device at pre-set time intervals; and
transferring the illuminance data related to the LED lighting device to the controller.
14. The method for verifying the lifespan of the LED lighting device according to claim 13, further comprising:
converting the illuminance data into a luminous flux or a luminous flux maintenance factor; and
sending the luminous flux or the luminous flux maintenance factor to the display terminal.
15. The method for verifying the lifespan of the LED lighting device according to claim 14, further comprising:
adding the pre-set interval of time to the lifespan of the LED lighting device when the measured luminous flux maintenance factor is less than a pre-defined value.
16. The method for verifying the lifespan of the LED lighting device according to claim 15, further comprising:
measuring an initial light intensity value after LED light sources are warmed up for 20 minutes; and
measuring another 3 to 5 consequent light intensity values at a time interval of every 20 minutes.
17. The method for verifying the lifespan of the LED lighting device according to claim 16, further comprising:
comparing the measured light intensity values to an initial light intensity value to determine a variance; and
resetting the initial illuminance value if the variance is less than 10%.
18. The method for verifying the lifespan of the LED lighting device according to claim 11, wherein the controller and the display terminal are connected to an external low voltage DC power source.
19. A system for measuring a lifespan of an LED lighting device, comprising:
an LED lighting device with one or more LED light sources;
a controller configured to keep time of the LED lighting device's lifespan;
a light intensity sensor configured to capture illuminance data related to the LED lighting device; and
a display terminal;
wherein the controller records time keeping data based on the illuminance data captured by the light intensity sensor and sends the time keeping data to be displayed on the display terminal.
20. The system for measuring the lifespan of the LED lighting device according to claim 19, further comprising:
a temperature sensor configured to capture temperature data of an LED light source, wherein the display terminal further displays the temperature data together with the time keeping data of the LED lighting device.
US14250871 2012-08-16 2014-04-11 Led lighting device and a method to verify its lifespan Pending US20140218039A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201210292622.7 2012-08-16
CN 201210292622 CN102821523A (en) 2012-08-16 2012-08-16 LED (Light-Emitting Diode) lighting device and service life verification method thereof
PCT/CN2012/086612 WO2014026455A1 (en) 2012-08-16 2012-12-14 Led illumination device and service life verification method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15216353 US20170010333A1 (en) 2012-08-16 2016-07-21 Led lighting device and a method to verify its lifespan

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/086612 Continuation-In-Part WO2014026455A1 (en) 2012-08-16 2012-12-14 Led illumination device and service life verification method therefor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15216353 Continuation-In-Part US20170010333A1 (en) 2012-08-16 2016-07-21 Led lighting device and a method to verify its lifespan

Publications (1)

Publication Number Publication Date
US20140218039A1 true true US20140218039A1 (en) 2014-08-07

Family

ID=47305287

Family Applications (1)

Application Number Title Priority Date Filing Date
US14250871 Pending US20140218039A1 (en) 2012-08-16 2014-04-11 Led lighting device and a method to verify its lifespan

Country Status (4)

Country Link
US (1) US20140218039A1 (en)
CN (1) CN102821523A (en)
EP (1) EP2869669A4 (en)
WO (1) WO2014026455A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170185122A1 (en) * 2015-12-29 2017-06-29 Flytech Technology Co., Ltd. System for displaying and prompting life percentage of electronic device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102821523A (en) * 2012-08-16 2012-12-12 浙江生辉照明有限公司 LED (Light-Emitting Diode) lighting device and service life verification method thereof
CN103472817B (en) * 2013-09-04 2017-12-15 深圳雷曼光电科技股份有限公司 Holding timing data reader, led display life monitoring system and method
CN103616561B (en) * 2013-11-06 2016-09-28 浙江生辉照明有限公司 A power detection circuit detecting method and apparatus of the Led lighting

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134277A (en) * 1983-11-07 1992-07-28 Australian Meat And Live-Stock Corporation Remote data transfer system with ambient light insensitive circuitry
US20060209195A1 (en) * 2003-08-21 2006-09-21 Makoto Goto Image device
US20080224966A1 (en) * 2007-03-15 2008-09-18 Cok Ronald S Led device compensation method
US20090273303A1 (en) * 2006-11-23 2009-11-05 Semisilicon Technology Corp. Synchronous light emitting diode lamp string controller
US20110254554A1 (en) * 2010-06-18 2011-10-20 Xicato, Inc. Led-based illumination module on-board diagnostics
US8471564B2 (en) * 2007-06-25 2013-06-25 Tridonicatco Schweiz Ag System and method for recording the characteristic curves of light-emitting diodes (LEDs)
US8643287B2 (en) * 2011-06-15 2014-02-04 National Tsing Hua University Lighting device with switchable day/night illumination mode
US8717194B2 (en) * 2010-12-21 2014-05-06 GE Lighting Solutions, LLC LED traffic signal compensation and protection methods

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2386449Y (en) * 1999-06-24 2000-07-05 中国人民解放军第二炮兵工程学院技术开发中心 Electrical instrument for estimating service life of electromechanical equipment
JP4341270B2 (en) * 2002-12-19 2009-10-07 東芝ライテック株式会社 Dimming system
CN201509347U (en) * 2009-08-18 2010-06-16 深圳市三辰科技有限公司 Auxiliary light source with timing function
KR20120045429A (en) * 2010-10-29 2012-05-09 엘지이노텍 주식회사 Method for providing life expetancy information of ight emitting device and system enabling of method
JP5800497B2 (en) * 2010-12-15 2015-10-28 東芝エレベータ株式会社 Lighting device of passenger conveyor
CN102413609B (en) * 2011-11-04 2013-11-13 王坤 Low-power illuminating system with LED (light-emitting diode) lamps
CN102720968B (en) * 2012-06-13 2014-06-04 浙江生辉照明有限公司 LED lighting device and life verification method thereof
CN102821523A (en) * 2012-08-16 2012-12-12 浙江生辉照明有限公司 LED (Light-Emitting Diode) lighting device and service life verification method thereof
CN202931599U (en) * 2012-08-16 2013-05-08 浙江生辉照明有限公司 LED lighting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134277A (en) * 1983-11-07 1992-07-28 Australian Meat And Live-Stock Corporation Remote data transfer system with ambient light insensitive circuitry
US20060209195A1 (en) * 2003-08-21 2006-09-21 Makoto Goto Image device
US20090273303A1 (en) * 2006-11-23 2009-11-05 Semisilicon Technology Corp. Synchronous light emitting diode lamp string controller
US20080224966A1 (en) * 2007-03-15 2008-09-18 Cok Ronald S Led device compensation method
US8471564B2 (en) * 2007-06-25 2013-06-25 Tridonicatco Schweiz Ag System and method for recording the characteristic curves of light-emitting diodes (LEDs)
US20110254554A1 (en) * 2010-06-18 2011-10-20 Xicato, Inc. Led-based illumination module on-board diagnostics
US8717194B2 (en) * 2010-12-21 2014-05-06 GE Lighting Solutions, LLC LED traffic signal compensation and protection methods
US8643287B2 (en) * 2011-06-15 2014-02-04 National Tsing Hua University Lighting device with switchable day/night illumination mode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170185122A1 (en) * 2015-12-29 2017-06-29 Flytech Technology Co., Ltd. System for displaying and prompting life percentage of electronic device

Also Published As

Publication number Publication date Type
EP2869669A4 (en) 2015-08-12 application
EP2869669A1 (en) 2015-05-06 application
CN102821523A (en) 2012-12-12 application
WO2014026455A1 (en) 2014-02-20 application

Similar Documents

Publication Publication Date Title
Leccese Remote-control system of high efficiency and intelligent street lighting using a ZigBee network of devices and sensors
US20100298957A1 (en) Multi-function sensor for home automation
US20100295455A1 (en) Apparatus and method of energy efficient illumination
US20040239524A1 (en) Monitoring terminal device
US20120139417A1 (en) Smart lighting system and method thereof
US20130234607A1 (en) Led lighting control apparatus and method based on visible light communication
US20120280833A1 (en) Smart Meter Emulation
US20140292208A1 (en) Methods, systems, and apparatus for intelligent lighting
US20110140906A1 (en) Use of one led to represent various utility rates and system status by varying frequency and/or duty cycle of led
US20110043136A1 (en) Light emitting diode system
US20140372072A1 (en) Methods and Devices for Transmitting/Obtaining Identification Information and Positioning by Visible Light Signal
US9049753B1 (en) Lighting device monitor and communication apparatus
CN101113942A (en) Air conditioner controller automatic test equipment and test method thereof
US8422889B2 (en) Noise detector in a light bulb
CN101701854A (en) Method for detecting junction temperature of chip of LED lamp
US20120313588A1 (en) Occupancy sensor with conditional energy transfer from load
US20140028198A1 (en) Apparatus and method of operating a luminaire
US20150091451A1 (en) Lighting device
US20080222439A1 (en) Notebook battery replacement time-saving method and battery detector thereof
US20140159585A1 (en) Luminaire with switch-mode converter power monitoring
CN102829890A (en) Device and method for measuring junction temperature of LED (light emitting diode)
US20130342342A1 (en) Intelligent safety device testing and operation
US20110098953A1 (en) Networked Device with Power Usage Estimation
Rajput et al. Intelligent street lighting system using GSM
US20110301909A1 (en) Temperature measurement system for a light emitting diode (led) assembly

Legal Events

Date Code Title Description
AS Assignment

Owner name: ZHEJIANG SHENGHUI LIGHTING CO., LTD, CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHEN, JINGXIANG;CHEN, FANG;WAN, YEHUA;REEL/FRAME:032657/0216

Effective date: 20140403

AS Assignment

Owner name: ZHEJIANG SHENGHUI LIGHTING CO., LTD, CHINA

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR NAME INSIDE ASSIGNMENT PREVIOUSLY RECORDED AT REEL: 032657 FRAME: 0216. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNORS:SHEN, JINXIANG;CHEN, FANG;WAN, YEHUA;REEL/FRAME:034114/0503

Effective date: 20140403