CN105844826A - Object measurement system through adoption of diode illuminator and detection method thereof - Google Patents
Object measurement system through adoption of diode illuminator and detection method thereof Download PDFInfo
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- CN105844826A CN105844826A CN201610258909.6A CN201610258909A CN105844826A CN 105844826 A CN105844826 A CN 105844826A CN 201610258909 A CN201610258909 A CN 201610258909A CN 105844826 A CN105844826 A CN 105844826A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
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Abstract
The present invention discloses an object measurement system through adoption of a diode illuminator. The system comprises: a turn-off state monitoring circuit configured to monitor the signal S3 generated due to a photovoltaic principle in the state of monitoring the turn-off of a diode; and an analysis circuit configured to take an assembly signal S2 stored in advance and the signal S3 to perform fuzzy matching. The assembly signal S2 includes an assembly signal S having an object and an assembly signal S having no object; the assembly signal S having an object is that: when there is an object at the diode illuminator photovoltaic induction interface, a plurality of calibrated signals S having an object are generated due to the photovoltaic principle in the state of monitoring the turn-off of the diode; the assembly signal S having no object is that: when there is not object at the diode illuminator photovoltaic induction interface, a plurality of calibrated signals S having no object are generated due to the photovoltaic principle in the state of monitoring the turn-off of the diode; and the assembly signal S2 and the signal S3 are employed to perform fuzzy matching.
Description
Technical field
The present invention relates to LED lighting body, a kind of survey system system utilizing LED lighting body and detection method thereof.
Background technology
Intrusion detector is the fore device in intrusion alarm system, it is made up of various detectors, it it is the haptic of intrusion alarm system, be equivalent to the eyes of people, nose, ear, skin etc., the change of the various physical quantitys such as the temperature at perception scene, humidity, abnormal smells from the patient, energy, and it is converted into according to certain rule the signal of telecommunication being suitable to transmission.Or due sensor difference different by the detection principle of detector is divided: can be divided into radar type microwave detector, microwave wall detector, active infrared formula detector, passive infrared formula detector, switching regulator detector, ultrasonic detector, voice activated detector, vibration detector etc..
Development along with diode light-source, present market, office building, the regions such as the corridor of family are substantially the diode of employing as light source, at present in field of detecting, the most do not use diode light-source as detection device, its intrusion detector is all to arrange individually detection device on the basis of object to detect, this adds the cost of separate cabling undoubtedly, such as when the family being not provided with intrusion system arranges invasion, assume to use Infrared Detectors, then need to arrange infrared detection head on doorway, then will be by infrared detection head and the system of analysis, alarm device connects, it is finally assembling to detection system, these all need rewiring, therefore life and the cost of client can greatly be affected.
Summary of the invention
It is an object of the invention to provide survey system system and the detection method thereof utilizing LED lighting body, the realization for object detector provides a kind of new implementation, simultaneously by this system without other independent wiring, can realize the detection of object.
The present invention is achieved through the following technical solutions:
The survey system utilizing LED lighting body is united, and including LED lighting body, diode drive circuit, off state observation circuit, analyzes circuit；
Diode drive circuit: for exporting the driving signal S1 of height alternating signal, diode current flow under high level state, diode turns off under low level；
Off state observation circuit: for monitoring under diode off state owing to light sends a telegraph the signal S3 that principle produces；
Analyze circuit: transfer aggregate signal S2 and the signal S3 prestored and carry out fuzzy matching；
Aggregate signal S2 includes aggregate signal SThere is thingWith aggregate signal SEmpty；
Aggregate signal SThere is thing: there is object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesThere is thing, by multiple demarcation signal SThere is thingSet forms aggregate signal SThere is thing
Aggregate signal SEmpty: there is no object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesEmpty, by multiple demarcation signal SEmptySet forms aggregate signal SEmpty；
Use aggregate signal S2 and signal S3 to carry out fuzzy matching, when signal S3 fuzzy matching to aggregate signal SThere is thingIn certain value immediate time, then there is thing information at output diode luminous body photic electric induction interface, signal S3 fuzzy matching to aggregate signal SEmptyIn certain value immediate time, then output diode luminous body photic electric induction interfaceEmptyInformation.
The design principle of the present invention is: the principle that LED lighting body is converted to luminous energy mainly by electric energy realizes illumination, photoelectric characteristic due to diode, diode also can produce electric current under illumination condition, and therefore, the present invention mainly utilizes the light of diode to send a telegraph principle.Owing to the power supply of LED lighting body typically uses the height alternating signal of hyperfrequency；Therefore, the present invention can be by the power supply of collection LED lighting body signal under low level zone state, i.e. send a telegraph, due to light, the signal S3 that principle produces under monitoring diode off state, when diode off state, under illumination condition, diode can produce the signal of telecommunication, and the general signal gathered is to drive, with LED lighting body, the signal of telecommunication that power supply is contrary, after obtaining signal S3, owing to aggregate signal S2 includes aggregate signal SThere is thingWith aggregate signal SEmpty, due to aggregate signal SThere is thingIt is when there being object to be positioned at LED lighting body photic electric induction interface (lower section), under diode off state, sends a telegraph, due to light, multiple demarcation signal S that principle producesThere is thing, therefore aggregate signal SThere is thingRepresent LED lighting body photic electric induction interface and there is object；Due to aggregate signal SEmptyIt is when there being object to be not at LED lighting body photic electric induction interface, under diode off state, sends a telegraph, due to light, multiple demarcation signal S that principle producesEmpty, therefore aggregate signal SEmptyRepresent LED lighting body photic electric induction interface and there is not object；At this moment, the above-mentioned aggregate signal S2 for contrast is prestored in advance due to us, therefore, we have only to the contrast aggregate signal S2 and signal S3 of obfuscation, find out in aggregate signal S2 immediate signal compared with signal S3, can be by judging the state of this immediate signal, final analysis goes out whether signal S3 correspondence LED lighting body photic electric induction interface has object.Such as, it will be assumed that aggregate signal SThere is thingIt is the alternating signal of 0.5V for high level, aggregate signal SEmptyBe the alternating signal of 1V for high level, and the signal S3 that we record is high level be the alternating signal of 0.7V, signal S3 respectively with aggregate signal SThere is thingWith aggregate signal SEmptyAfter Bi compare, aggregate signal SThere is thingFor immediate signal, accordingly, because aggregate signal SThere is thingRepresenting LED lighting body photic electric induction interface and have object, we pass through aggregate signal SThere is thingJudge that signal S3 represents current light emitting diode light and sends a telegraph sensing interface and there is object.
Preferably, the plurality of demarcation signal SThere is thingIncluding different characteristic object by sending a telegraph, due to light, multiple demarcation signals that principle produces under LED lighting body and diode off state.
By signal S3 and multiple demarcation signal SThere is thingCarry out fuzzy matching, match the demarcation signal S closest to signal S3There is thing, export this demarcation signal SThere is thingThe feature of corresponding object.
nullThrough above-mentioned technology contents，With aggregate signal S2 relative analysis, we can not only be by going out whether current LED lighting body photic electric induction interface exists object by signal S3，We can also pass through different objects correspondence difference demarcation signal，Drawn with S3 contrast by demarcation signal，Current LED lighting body photic electric induction interface is to there is what object，Such as，We are previously stored with: the first demarcation signal that people produces when LED lighting body photic electric induction interface，The second demarcation signal that car produces when LED lighting body photic electric induction interface，Assume the first demarcation signal be high level be the alternating signal of 0.7V，Second demarcation signal be high level be the alternating signal of 0.8V，And signal S3 is high level is the alternating signal of 0.7V，Then may determine that the first demarcation signal is the signal closest to signal S3，Then can analyze，In the case of obtaining signal S3，That stand in Light-Emitting Diode matrix photic electric induction interface is people.
Preferably, the plurality of demarcation signal SEmptyIncluding varying environment feature and LED lighting body photic electric induction interface without sending a telegraph, due to light, multiple demarcation signals that principle produces under object, diode off state.
By signal S3 and multiple demarcation signal SEmptyCarry out fuzzy matching, match the demarcation signal S closest to signal S3Empty, export this demarcation signal SThere is thingThe feature of corresponding environment.
nullThrough above-mentioned technology contents，With aggregate signal S2 relative analysis, we can not only be by going out whether current LED lighting body photic electric induction interface exists object by signal S3，When being arranged on LED lighting body photic electric induction interface without object，We can also pass through varying environment feature correspondence difference demarcation signal，Drawn with S3 contrast by demarcation signal，Which kind of environmental characteristic current LED lighting body is in，Such as，We are previously stored with: the first demarcation signal produced during 12 noon LED lighting body photic electric induction interface，The second demarcation signal produced during 12 LED lighting body photic electric induction interfaces at night，Assume the first demarcation signal be high level be the alternating signal of 1.2V，Second demarcation signal be high level be the alternating signal of 0.2V，And signal S3 is high level is the alternating signal of 1.1V，Then may determine that the first demarcation signal is the signal closest to signal S3，Then can analyze，In the case of obtaining signal S3，Current time is about 12 noon，Fuzzy processing，Think that current time is 12 points.
Based on the described detection method surveying system system utilizing LED lighting body, comprise the following steps:
Initialization step: the object of various different characteristics is arranged on LED lighting body photic electric induction interface, obtains under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesThere is thing, the corresponding demarcation signal S of each type objectsThere is thing；When LED lighting body photic electric induction interface is not provided with object and in the case of varying environment feature, obtain under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesEmpty, the corresponding demarcation signal S of each class environmental characteristicEmpty；By all demarcation signal SThere is thingFlock together formation aggregate signal SThere is thing, by all demarcation signal SEmptyFlock together formation aggregate signal SEmpty, by aggregate signal SThere is thingWith aggregate signal SEmptyFlock together formation aggregate signal S2；
Off state monitoring step: send a telegraph, due to light, the signal S3 that principle produces under detection diode off state；
Analyze and judge step: obfuscation comparison signal S3 and aggregate signal S2, choose signal immediate with signal S3 in aggregate signal S2, analyze the state closest to signal, it is judged that whether LED lighting body photic electric induction interface has object.
Judge when whether LED lighting body photic electric induction interface has object, when there being object, it is judged that the feature of object；When without object, it is judged that external environment condition feature.
The present invention compared with prior art, has such advantages as and beneficial effect: without being separately provided wiring, utilizes light emitting diode can realize different objects, the detection of different external environment conditions.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.
Fig. 1 is present configuration block diagram.
Fig. 2 is signal fusing schematic diagram.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1:
As depicted in figs. 1 and 2.
The survey system utilizing LED lighting body is united, and including LED lighting body, diode drive circuit, off state observation circuit, analyzes circuit；
Diode drive circuit: for exporting the driving signal S1 of height alternating signal, diode current flow under high level state, diode turns off under low level；
Off state observation circuit: for monitoring under diode off state owing to light sends a telegraph the signal S3 that principle produces；
Analyze circuit: transfer aggregate signal S2 and the signal S3 prestored and carry out fuzzy matching；
Aggregate signal S2 includes aggregate signal SThere is thingWith aggregate signal SEmpty；
Aggregate signal SThere is thing: there is object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesThere is thing；
Aggregate signal SEmpty: there is no object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesEmpty；
Use aggregate signal S2 and signal S3 to carry out fuzzy matching, when signal S3 fuzzy matching to aggregate signal SThere is thingIn certain value immediate time, then there is thing information at output diode luminous body photic electric induction interface, signal S3 fuzzy matching to aggregate signal SEmptyIn certain value immediate time, then output diode luminous body photic electric induction interface empty information.
The design principle of the present invention is: the principle that LED lighting body is converted to luminous energy mainly by electric energy realizes illumination, photoelectric characteristic due to diode, diode also can produce electric current under illumination condition, and therefore, the present invention mainly utilizes the light of diode to send a telegraph principle.Owing to the power supply of LED lighting body typically uses the height alternating signal of hyperfrequency；Therefore, the present invention can be by the power supply of collection LED lighting body signal under low level zone state, i.e. send a telegraph, due to light, the signal S3 that principle produces under monitoring diode off state, when diode off state, under illumination condition, diode can produce the signal of telecommunication, and the general signal gathered is to drive, with LED lighting body, the signal of telecommunication that power supply is contrary, after obtaining signal S3, owing to aggregate signal S2 includes aggregate signal SThere is thingWith aggregate signal SEmpty, due to aggregate signal SThere is thingIt is when there being object to be positioned at LED lighting body photic electric induction interface, under diode off state, sends a telegraph, due to light, multiple demarcation signal S that principle producesThere is thing, therefore aggregate signal SThere is thingRepresent LED lighting body photic electric induction interface and there is object；Due to aggregate signal SEmptyIt is when there being object to be not at LED lighting body photic electric induction interface, under diode off state, sends a telegraph, due to light, multiple demarcation signal S that principle producesEmpty, therefore aggregate signal SEmptyRepresent LED lighting body photic electric induction interface and there is not object；At this moment, the above-mentioned aggregate signal S2 for contrast is prestored in advance due to us, therefore, we have only to the contrast aggregate signal S2 and signal S3 of obfuscation, find out in aggregate signal S2 immediate signal compared with signal S3, can be by judging the state of this immediate signal, final analysis goes out whether signal S3 correspondence LED lighting body photic electric induction interface has object.Such as, it will be assumed that aggregate signal SThere is thingIt is the alternating signal of 0.5V for high level, aggregate signal SEmptyBe the alternating signal of 1V for high level, and the signal S3 that we record is high level be the alternating signal of 0.7V, signal S3 respectively with aggregate signal SThere is thingWith aggregate signal SEmptyAfter Bi compare, aggregate signal SThere is thingFor immediate signal, accordingly, because aggregate signal SThere is thingRepresenting LED lighting body photic electric induction interface and have object, we pass through aggregate signal SThere is thingJudge that signal S3 represents current light emitting diode light and sends a telegraph sensing interface and there is object.
Preferably, the plurality of demarcation signal SThere is thingIncluding different characteristic object by sending a telegraph, due to light, multiple demarcation signals that principle produces under LED lighting body and diode off state.
By signal S3 and multiple demarcation signal SThere is thingCarry out fuzzy matching, match the demarcation signal S closest to signal S3There is thing, export this demarcation signal SThere is thingThe feature of corresponding object.
nullThrough above-mentioned technology contents，With aggregate signal S2 relative analysis, we can not only be by going out whether current LED lighting body photic electric induction interface exists object by signal S3，We can also pass through different objects correspondence difference demarcation signal，Drawn with S3 contrast by demarcation signal，Current LED lighting body photic electric induction interface is to there is what object，Such as，We are previously stored with: the first demarcation signal that people produces when LED lighting body photic electric induction interface，The second demarcation signal that car produces when LED lighting body photic electric induction interface，Assume the first demarcation signal be high level be the alternating signal of 0.7V，Second demarcation signal be high level be the alternating signal of 0.8V，And signal S3 is high level is the alternating signal of 0.7V，Then may determine that the first demarcation signal is the signal closest to signal S3，Then can analyze，In the case of obtaining signal S3，That stand in Light-Emitting Diode matrix photic electric induction interface is people.
Preferably, the plurality of demarcation signal SEmptyIncluding varying environment feature and LED lighting body photic electric induction interface without sending a telegraph, due to light, multiple demarcation signals that principle produces under object, diode off state.
By signal S3 and multiple demarcation signal SEmptyCarry out fuzzy matching, match the demarcation signal S closest to signal S3Empty, export this demarcation signal SThere is thingThe feature of corresponding environment.
nullThrough above-mentioned technology contents，With aggregate signal S2 relative analysis, we can not only be by going out whether current LED lighting body photic electric induction interface exists object by signal S3，When being arranged on LED lighting body photic electric induction interface without object，We can also pass through varying environment feature correspondence difference demarcation signal，Drawn with S3 contrast by demarcation signal，Which kind of environmental characteristic current LED lighting body is in，Such as Fig. 2，Such as，We are previously stored with: the first demarcation signal produced during 12 noon LED lighting body photic electric induction interface，The second demarcation signal produced during 12 LED lighting body photic electric induction interfaces at night，Assume the first demarcation signal be high level be the alternating signal of 1.2V，Second demarcation signal be high level be the alternating signal of 0.2V，And signal S3 is high level is the alternating signal of 1.1V，Then may determine that the first demarcation signal is the signal closest to signal S3，Then can analyze，In the case of obtaining signal S3，Current time is about 12 noon，Fuzzy processing，Think that current time is 12 points.
The present invention can also judge external weather conditions, such as, we are previously stored with: the first demarcation signal produced during fine day LED lighting body photic electric induction interface, the second demarcation signal produced during rainy day LED lighting body photic electric induction interface, assume the first demarcation signal be high level be the alternating signal of 1.2V, second demarcation signal be high level be the alternating signal of 0.4V, and signal S3 is high level is the alternating signal of 1.0V, then may determine that the first demarcation signal is the signal closest to signal S3, then can analyze, in the case of obtaining signal S3, current weather is fine day, Fuzzy processing, think that current time is 12 points.
Based on above-mentioned analysis, the design philosophy of the present invention is, utilize the training of early stage, form a huge Signals Data Base, this data base contain a variety of under the conditions of the signal that feeds back in the off case of Light-Emitting Diode matrix, gone out the demarcation signal being close with signal S3 in aggregate signal S2 by obfuscation comparison match, the state of demarcation signal can be analyzed, thus draw the situation at LED lighting body photic electric induction interface when signal S3 measures.
Based on the described detection method surveying system system utilizing LED lighting body, comprise the following steps:
Initialization step: the object of various different characteristics is arranged on LED lighting body photic electric induction interface, obtains under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesThere is thing, the corresponding demarcation signal S of each type objectsThere is thing；When LED lighting body photic electric induction interface is not provided with object and in the case of varying environment feature, obtain under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesEmpty, the corresponding demarcation signal S of each class environmental characteristicEmpty；By all demarcation signal SThere is thingFlock together formation aggregate signal SThere is thing, by all demarcation signal SEmptyFlock together formation aggregate signal SEmpty, by aggregate signal SThere is thingWith aggregate signal SEmptyFlock together formation aggregate signal S2；
Off state monitoring step: send a telegraph, due to light, the signal S3 that principle produces under detection diode off state；
Analyze and judge step: obfuscation comparison signal S3 and aggregate signal S2, choose signal immediate with signal S3 in aggregate signal S2, analyze the state closest to signal, it is judged that whether LED lighting body photic electric induction interface has object.
Judge when whether LED lighting body photic electric induction interface has object, when there being object, it is judged that the feature of object；When without object, it is judged that external environment condition feature.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical field, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (7)
1. the survey system utilizing LED lighting body is united, it is characterised in that: include LED lighting body, diode drive circuit, off state observation circuit, analyze circuit；
Diode drive circuit: for exporting the driving signal S1 of height alternating signal, diode current flow under high level state, diode turns off under low level；
Off state observation circuit: for monitoring under diode off state owing to light sends a telegraph the signal S3 that principle produces；
Analyze circuit: transfer aggregate signal S2 and the signal S3 prestored and carry out fuzzy matching；
Aggregate signal S2 includes aggregate signal SThere is thingWith aggregate signal SEmpty；
Aggregate signal SThere is thing: there is object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesThere is thing, by multiple demarcation signal SThere is thingSet forms aggregate signal SThere is thing；
Aggregate signal SEmpty: there is no object when LED lighting body photic electric induction interface, under diode off state, send a telegraph, due to light, multiple demarcation signal S that principle producesEmpty, by multiple demarcation signal SEmptySet forms aggregate signal SEmpty；
Use aggregate signal S2 and signal S3 to carry out fuzzy matching, when signal S3 fuzzy matching to aggregate signal SThere is thingIn certain value immediate time, then there is thing information at output diode luminous body photic electric induction interface, signal S3 fuzzy matching to aggregate signal SEmptyIn certain value immediate time, then output diode luminous body photic electric induction interface empty information.
The survey system utilizing LED lighting body the most according to claim 1 is united, it is characterised in that: the plurality of demarcation signal SEmptyIncluding different characteristic object by sending a telegraph, due to light, multiple demarcation signals that principle produces under LED lighting body and diode off state.
The survey system utilizing LED lighting body the most according to claim 2 is united, it is characterised in that: by signal S3 and multiple demarcation signal SThere is thingCarry out fuzzy matching, match the demarcation signal S closest to signal S3There is thing, export this demarcation signal SThere is thingThe feature of corresponding object.
The survey system utilizing LED lighting body the most according to claim 1 is united, it is characterised in that: the plurality of demarcation signal SEmptyIncluding varying environment feature and LED lighting body photic electric induction interface without sending a telegraph, due to light, multiple demarcation signals that principle produces under object, diode off state.
The survey system utilizing LED lighting body the most according to claim 4 is united, it is characterised in that: by multiple demarcation signal S in signal S3 and aggregate signal S2EmptyCarry out fuzzy matching, match the demarcation signal S closest to signal S3Empty, export this demarcation signal SThere is thingThe feature of corresponding environment.
6. based on the detection method surveying system system utilizing LED lighting body described in any one in claim 1-5, it is characterised in that comprise the following steps:
Initialization step: the object of various different characteristics is arranged on LED lighting body photic electric induction interface, obtains under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesThere is thing, the corresponding demarcation signal S of each type objectsThere is thing；When LED lighting body photic electric induction interface is not provided with object and in the case of varying environment feature, obtain under diode off state owing to light sends a telegraph multiple demarcation signal S that principle producesEmpty, the corresponding demarcation signal S of each class environmental characteristicEmpty；By all demarcation signal SThere is thingFlock together formation aggregate signal SThere is thing, by all demarcation signal SEmptyFlock together formation aggregate signal SEmpty, by aggregate signal SThere is thingWith aggregate signal SEmptyFlock together formation aggregate signal S2；
Off state monitoring step: send a telegraph, due to light, the signal S3 that principle produces under detection diode off state；
Analyze and judge step: obfuscation comparison signal S3 and aggregate signal S2, choose signal immediate with signal S3 in aggregate signal S2, analyze the state closest to signal, it is judged that whether LED lighting body photic electric induction interface has object.
7. based on the detection method described in claim 6, it is characterised in that judge when whether LED lighting body photic electric induction interface has object, when there being object, it is judged that the feature of object；When without object, it is judged that external environment condition feature.
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| CN103221981A (en) * | 2010-10-27 | 2013-07-24 | 皇家飞利浦电子股份有限公司 | A presence detection system and a lighting system |
| CN203761632U (en) * | 2013-12-30 | 2014-08-06 | 四川新力光源股份有限公司 | Security and protection LED lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020179815A1 (en) * | 2001-05-30 | 2002-12-05 | Ulrich Forke | Lighting control circuit |
| EP1701589A1 (en) * | 2005-03-08 | 2006-09-13 | Sony Ericsson Mobile Communications AB | Electric circuit and method for monitoring a temperature of a light emitting diode |
| CN101675709A (en) * | 2007-04-20 | 2010-03-17 | 皇家飞利浦电子股份有限公司 | Lighting device with the LED that is used to detect |
| CN103221981A (en) * | 2010-10-27 | 2013-07-24 | 皇家飞利浦电子股份有限公司 | A presence detection system and a lighting system |
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