CN103369768A - Light fixture temperature self-adaptive protection circuit and light fixture - Google Patents
Light fixture temperature self-adaptive protection circuit and light fixture Download PDFInfo
- Publication number
- CN103369768A CN103369768A CN2012100930016A CN201210093001A CN103369768A CN 103369768 A CN103369768 A CN 103369768A CN 2012100930016 A CN2012100930016 A CN 2012100930016A CN 201210093001 A CN201210093001 A CN 201210093001A CN 103369768 A CN103369768 A CN 103369768A
- Authority
- CN
- China
- Prior art keywords
- resistance
- light fixture
- switching tube
- connects
- circuit
- 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.)
- Granted
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention is applicable to the field of an illumination circuit, and particularly relates to a light fixture temperature self-adaptive protection circuit and a light fixture. In the embodiment of the invention, the light fixture temperature self-adaptive protection circuit is connected with a temperature detection circuit and a light fixture output power control circuit respectively; through receiving the signals sent by the temperature detection circuit, the light fixture temperature self-adaptive protection circuit determines whether the temperature of the housing of the light mixture is too high or too low and controls the light fixture output power control circuit so as to enable the light fixture output power control circuit to control the output power of the light mixture to perform self-adaptive adjustment according to the temperature of the housing.
Description
Technical field
The invention belongs to the lighting circuit field, relate in particular to a kind of lamp temperatures adaptive guard circuit and light fixture.
Background technology
Light fixture is widely used in the middle of the daily life as a kind of electric equipment products of routine.
After the general light fixture operating time was long, the temperature of its shell all can raise, and the temperature of lamp outer casing is relevant with the power output of light fixture, and power output is larger, and the temperature of lamp outer casing is just higher.
Generally speaking, the power output of light fixture is constant, but in some applications, because the light fixture operating time is oversize, after causing skin temperature too high, can produce potential safety hazard, this just needs the power output of light fixture to do the self adaptation adjustment with skin temperature, but does not also have a kind of power output of light fixture to do the self adaptation adjustment with temperature at present.
Summary of the invention
The object of the present invention is to provide a kind of lamp temperatures adaptive guard circuit; be intended to solve the power output that does not have now a kind of light fixture and can do the self adaptation adjustment with temperature; cause the light fixture operating time oversize, after skin temperature is too high, can produce the problem of potential safety hazard.
The present invention is achieved in that a kind of lamp temperatures adaptive guard circuit, connects respectively for the temperature detection circuit of surveying lamp temperatures with for the light fixture output power controlling circuit of controlling the light fixture power output, and described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, described resistance R 1 and resistance R 2 are serially connected between the anode and ground of described pressurizer Z1, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect respectively the two ends of described resistance R 1, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R 3, the second termination power of described resistance R 3, the second termination power of described resistance R 6, the hot end of the described switching tube of the first termination of described resistance R 6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R 5, described resistance R 4 is connected between the emitter and ground of triode of described photoelectrical coupler U1, described capacitor C 1 is connected between the control end and ground of described switching tube, and the cold end of described switching tube connects described light fixture output power controlling circuit by described resistance R 7.
Another object of the present invention is to provide a kind of light fixture; comprise for the temperature detection circuit of surveying lamp temperatures with for the light fixture output power controlling circuit of controlling the light fixture power output; and the lamp temperatures adaptive guard circuit of difference jointing temp detection circuit and light fixture output power controlling circuit, described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, described resistance R 1 and resistance R 2 are serially connected between the anode and ground of described pressurizer Z1, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect respectively the two ends of described resistance R 1, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R 3, the second termination power of described resistance R 3, the second termination power of described resistance R 6, the hot end of the described switching tube of the first termination of described resistance R 6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R 5, described resistance R 4 is connected between the emitter and ground of triode of described photoelectrical coupler U1, described capacitor C 1 is connected between the control end and ground of described switching tube, and the cold end of described switching tube connects described light fixture output power controlling circuit by described resistance R 7.
In the present invention; lamp temperatures adaptive guard circuit is jointing temp detection circuit and light fixture output power controlling circuit respectively; the signal that sends by receiving temperature detection circuit; lamp temperatures adaptive guard circuit judges lamp outer casing too high or too low for temperature; and control light fixture output power controlling circuit makes the power output of its control light fixture do the self adaptation adjustment with skin temperature.
Description of drawings
Fig. 1 is the circuit structure diagram of the lamp temperatures adaptive guard circuit that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the lamp temperatures adaptive guard circuit that provides of second embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the circuit structure of the lamp temperatures adaptive guard circuit that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
A kind of lamp temperatures adaptive guard circuit 300; connect respectively for the temperature detection circuit 100 of surveying lamp temperatures with for the light fixture output power controlling circuit 200 of controlling the light fixture power output; light fixture output power controlling circuit 200 is by the variation of the resistance sizes of control lamp circuit; thereby the size of control light fixture power output; in general; it is large that resistance becomes; the light fixture power output diminishes; thereby the lamp outer casing temperature is reduced; and resistance decreasing; it is large that the light fixture power output becomes, thereby the lamp outer casing temperature is raise.
Lamp temperatures adaptive guard circuit 300 comprises:
Pressurizer Z1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 1, photoelectrical coupler U1 and switching tube 301;
The negative electrode jointing temp detection circuit 100 of pressurizer Z1, resistance R 1 and resistance R 2 are serially connected between the anode and ground of pressurizer Z1, the anode of the luminous tube of photoelectrical coupler U1 and negative electrode be the two ends of connecting resistance R1 respectively, the first end of the collector electrode connecting resistance R3 of the triode of photoelectrical coupler U1, the second termination power Vcc of resistance R 3, the second termination power Vcc of resistance R 6, the hot end of the first termination switching tube 301 of resistance R 6, the emitter of the triode of photoelectrical coupler U1 connects the control end of switching tube 301 by resistance R 5, resistance R 4 is connected between the emitter and ground of triode of photoelectrical coupler U1, capacitor C 1 is connected between the control end and ground of switching tube 301, and the cold end of switching tube 301 connects light fixture output power controlling circuit 200 by resistance R 7.
As one embodiment of the invention, switching tube 301 adopts NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of switching tube 301, the first end of the collector electrode connecting resistance R6 of NPN type triode Q1, the emitter of NPN type triode Q1 connects light fixture output power controlling circuit 200 by resistance R 7.
Fig. 2 shows the circuit structure of the lamp temperatures adaptive guard circuit that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
As one embodiment of the invention, switching tube 301 adopts N-type metal-oxide-semiconductor Q2, the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 301, the first end of the drain electrode connecting resistance R6 of N-type metal-oxide-semiconductor Q2, and the source electrode of N-type metal-oxide-semiconductor Q2 connects light fixture output power controlling circuit 200 by resistance R 7.
Adopt NPN type triode Q1 as example take switching tube 301, the operation principle of lamp temperatures adaptive guard circuit 300 described:
In the light fixture course of work, when detecting the lamp outer casing temperature, temperature detection circuit 100 raises above preset range, be that output voltage U o raises, voltage-stabiliser tube Z1 and photoelectrical coupler U1 conducting, NPN type triode Q1 base stage has driving voltage and conducting, and the emitter output voltage of NPN type triode Q1 raises, and the resistance that this output voltage can be controlled lamp circuit becomes large, the light fixture power output is reduced, thereby the lamp outer casing temperature is reduced; When temperature detection circuit 100 output voltage U o reduction, not conducting of voltage-stabiliser tube Z1, the emitter output voltage of NPN type triode Q1 reduces, and the resistance decreasing of control lamp circuit improves the light fixture power output, thereby the lamp outer casing temperature is raise; The emitter output voltage stabilization of NPN type triode Q1 is (the voltage stabilizing value that depends on voltage-stabiliser tube Z1) in certain scope.
The embodiment of the invention also provides a kind of light fixture; comprise temperature detection circuit 100, light fixture output power controlling circuit 200 and aforesaid lamp temperatures adaptive guard circuit 300, lamp temperatures adaptive guard circuit 300 is jointing temp detection circuit 100 and light fixture output power controlling circuit 200 respectively.
In embodiments of the present invention; lamp temperatures adaptive guard circuit is jointing temp detection circuit and light fixture output power controlling circuit respectively; the signal that sends by receiving temperature detection circuit; lamp temperatures adaptive guard circuit judges lamp outer casing too high or too low for temperature; and control light fixture output power controlling circuit makes the power output of its control light fixture do the self adaptation adjustment with skin temperature.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a lamp temperatures adaptive guard circuit connects respectively for the temperature detection circuit of surveying lamp temperatures with for the light fixture output power controlling circuit of controlling the light fixture power output, it is characterized in that described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, described resistance R 1 and resistance R 2 are serially connected between the anode and ground of described pressurizer Z1, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect respectively the two ends of described resistance R 1, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R 3, the second termination power of described resistance R 3, the second termination power of described resistance R 6, the hot end of the described switching tube of the first termination of described resistance R 6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R 5, described resistance R 4 is connected between the emitter and ground of triode of described photoelectrical coupler U1, described capacitor C 1 is connected between the control end and ground of described switching tube, and the cold end of described switching tube connects described light fixture output power controlling circuit by described resistance R 7.
2. lamp temperatures adaptive guard circuit as claimed in claim 1; it is characterized in that; described switching tube adopts NPN type triode Q1; the base stage of described NPN type triode Q1 is the control end of switching tube; the collector electrode of described NPN type triode Q1 connects the first end of described resistance R 6, and the emitter of described NPN type triode Q1 connects described light fixture output power controlling circuit by described resistance R 7.
3. lamp temperatures adaptive guard circuit as claimed in claim 1; it is characterized in that; described switching tube adopts N-type metal-oxide-semiconductor Q2; the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube; the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the first end of described resistance R 6, and the source electrode of described N-type metal-oxide-semiconductor Q2 connects described light fixture output power controlling circuit by described resistance R 7.
4. light fixture; comprise temperature detection circuit and light fixture output power controlling circuit; and connect respectively for the temperature detection circuit of surveying lamp temperatures and be used for the lamp temperatures adaptive guard circuit of the light fixture output power controlling circuit of control light fixture power output; it is characterized in that described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, described resistance R 1 and resistance R 2 are serially connected between the anode and ground of described pressurizer Z1, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect respectively the two ends of described resistance R 1, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R 3, the second termination power of described resistance R 3, the second termination power of described resistance R 6, the hot end of the described switching tube of the first termination of described resistance R 6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R 5, described resistance R 4 is connected between the emitter and ground of triode of described photoelectrical coupler U1, described capacitor C 1 is connected between the control end and ground of described switching tube, and the cold end of described switching tube connects described light fixture output power controlling circuit by described resistance R 7.
5. light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of switching tube, the collector electrode of described NPN type triode Q1 connects the first end of described resistance R 6, and the emitter of described NPN type triode Q1 connects described light fixture output power controlling circuit by described resistance R 7.
6. light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts N-type metal-oxide-semiconductor Q2, the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the first end of described resistance R 6, and the source electrode of described N-type metal-oxide-semiconductor Q2 connects described light fixture output power controlling circuit by described resistance R 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210093001.6A CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210093001.6A CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103369768A true CN103369768A (en) | 2013-10-23 |
| CN103369768B CN103369768B (en) | 2016-03-02 |
Family
ID=49370014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210093001.6A Expired - Fee Related CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103369768B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101401486A (en) * | 2006-02-03 | 2009-04-01 | 霍尼韦尔国际公司 | Temperature controlled LED array |
| CN201365363Y (en) * | 2009-03-04 | 2009-12-16 | 广州复旦奥特科技股份有限公司 | Intelligent led illuminating driver |
| CN201937894U (en) * | 2010-12-08 | 2011-08-17 | 西安福安创意咨询有限责任公司 | Light emitting diode (LED) lamp circuit |
| CN102231930A (en) * | 2011-07-27 | 2011-11-02 | 四川九洲光电科技股份有限公司 | Light-control digital interface circuit |
-
2012
- 2012-03-31 CN CN201210093001.6A patent/CN103369768B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101401486A (en) * | 2006-02-03 | 2009-04-01 | 霍尼韦尔国际公司 | Temperature controlled LED array |
| CN201365363Y (en) * | 2009-03-04 | 2009-12-16 | 广州复旦奥特科技股份有限公司 | Intelligent led illuminating driver |
| CN201937894U (en) * | 2010-12-08 | 2011-08-17 | 西安福安创意咨询有限责任公司 | Light emitting diode (LED) lamp circuit |
| CN102231930A (en) * | 2011-07-27 | 2011-11-02 | 四川九洲光电科技股份有限公司 | Light-control digital interface circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103369768B (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103001177A (en) | LED lamp and overheat protecting circuit thereof | |
| US20150326219A1 (en) | Driving circuit for igbt module | |
| CN104218558B (en) | Anti-surging high tension protection circuit | |
| CN210350770U (en) | Overcurrent protection device | |
| CN103390878A (en) | Lamp power output overvoltage protection circuit and lamp | |
| EP2557681A1 (en) | Voltage driving apparatus for power amplifier, power amplifying system, power supply device for radio frequency power amplifier and communication device | |
| CN203261005U (en) | LED constant-current over-temperature protection circuit and LED lamp | |
| US20150177290A1 (en) | Controller for automatically detecting the maximal operating current of light sources and detection method thereof | |
| CN107294199A (en) | A kind of compound voltage detecting switching circuit of logic | |
| CN105934021A (en) | Overvoltage adjusting circuit for linear constant-current driving LED | |
| CN204652748U (en) | A kind of LED drive circuit | |
| CN103369768B (en) | A kind of lamp temperatures adaptive guard circuit and light fixture | |
| CN103354689B (en) | Driving power device for LED lamp dimming | |
| CN105578645A (en) | Over-current protection method of LED driving power supply | |
| CN205883643U (en) | Overheated and current foldback circuit of LED lamp plain type | |
| CN205071002U (en) | Light module power supply circuit and communications facilities | |
| CN104113956A (en) | Lighting switch control circuit and lamp | |
| CN106332397B (en) | LED drive chip, LED drive circuit and LED lamp | |
| CN204407877U (en) | A kind of large light input A/D sampling overvoltage crowbar | |
| CN104066221A (en) | Optical detection circuit and light fixture | |
| CN105822585B (en) | A kind of multi-mode fan control circuitry, heat abstractor and electronic equipment being delayed | |
| CN203367976U (en) | Pan and tilt overvoltage protection system | |
| CN103415118B (en) | Backlight drive circuit, electronic installation and backlight driving method | |
| CN209072069U (en) | A kind of anti-circnit NOT of heavy DC | |
| CN203951662U (en) | A kind of protective circuit of light-emitting diode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20190331 |