CN103852162A - Light attenuation control circuit - Google Patents
Light attenuation control circuit Download PDFInfo
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- CN103852162A CN103852162A CN201210517884.9A CN201210517884A CN103852162A CN 103852162 A CN103852162 A CN 103852162A CN 201210517884 A CN201210517884 A CN 201210517884A CN 103852162 A CN103852162 A CN 103852162A
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- transistor
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- alarm
- control circuit
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- 238000001514 detection method Methods 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention relates to the lighting field, in particular to a light attenuation control circuit of a lighting lamp. The light attenuation control circuit comprises a detection circuit and an alarm circuit electrically connected with the detection circuit. The detection circuit is mainly composed of a photoresistor, a transistor and multiple resistors. One end of the photoresistor is electrically connected to a base electrode of the transistor, the other end of the photoresistor is electrically connected to a positive electrode of a power source, a collector electrode of the transistor and one resistor are in series connection with the positive electrode of the power source, and one resistor is in parallel connection between the collector electrode and an emitting electrode of the transistor. The alarm circuit is mainly composed of an alarm and the transistor. The emitting electrode of the transistor is electrically connected to the alarm, the collector electrode of the transistor is electrically connected to the positive electrode of the power source, and the base electrode of the transistor is electrically connected to the detection circuit. Detection results of the detection circuit control the transistor in the alarm circuit to be switched on and switched off, so that alarm sound is controlled to be produced by the alarm, and the purpose that a user is reminded to replace the lamp is achieved.
Description
Technical field
The present invention relates to lighting field, be specifically related to the light decay control circuit of lighting.
Background technology
LED has that volume is little, energy consumption is low, long service life, brightness advantages of higher, is applied to more and more widely lighting field.Approximately 100000 hours theoretical service lives of LED, because LED exists light decay, 50000～100000 hours its actual lives.
LED light fixture is in the process using, and its brightness reduces gradually along with the light decay of LED, in the time that the brightness of LED light fixture is reduced to lighting field the minimum brightness of brightness is required, just need to change light fixture, otherwise will affect people's normal life.But, in prior art, the measure that detects LED lamp brightness is not set, remind user to change relevant lighting.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of light decay control circuit, in the time that LED decays to preset value, light fixture sends warning, to remind user to change light fixture.
In order to achieve the above object, the technical solution used in the present invention: light decay control circuit, the warning circuit that comprises testing circuit and be electrically connected with testing circuit, described testing circuit is mainly made up of photoresistance, transistor and multiple resistance, one end of photoresistance is connected electrically in transistorized base stage, the other end is connected electrically on the positive pole of power supply, transistorized collector and a resistance are connected in series on the positive pole of power supply, and between transistorized collector and emitter, are connected with in parallel a resistance; Described warning circuit is mainly made up of alarm and transistor, and on transistorized emitter electrical connection alarm, collector is connected electrically on the positive pole of power supply, and base stage is electrically connected with testing circuit.Transistorized conducting and cut-off in the testing result control warning circuit of testing circuit, send chimes of doom thereby control alarm, to reach the object of reminding user to change light fixture.
As to further improvement of the present invention, the resistance of connecting between transistorized base stage that can be in testing circuit and photoresistance, to increase the range of choice of photoresistance.
As to further improvement of the present invention, a two ends electric capacity in parallel of the resistance of connecting between transistorized base stage that can be in testing circuit and photoresistance, to alleviate the control effect of testing circuit to warning circuit.
As to further improvement of the present invention, can a holding circuit be set on the transistorized collector of warning circuit or emitter, in order to avoid loudspeaker burns because electric current is excessive.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, a kind of embodiment of the present invention is described in detail.
As shown in Figure 1, be a kind of specific embodiment of light decay control circuit of the present invention, it comprises testing circuit 1 and warning circuit 2.
Testing circuit 1 comprises photoresistance RT, resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and transistor Q2.Photoresistance RT one end is connected with the positive pole of power supply, and the other end is electrically connected with the base stage of transistor Q2; Capacitor C 1 is connected to behind the two ends of resistance R 1 in parallel, be connected to together in the base stage of transistor Q2, and capacitor C 1 and resistance R 1 is between photoresistance RT and the base stage of transistor Q2; The collector of transistor Q2 is connected electrically on the positive pole of power supply by resistance R 2, and transistor Q2 collector and emitter two ends are connected with resistance R 3 in parallel, and connected node 3 is between resistance R 2 and transistor Q2 collector.
In the time that the brightness of light is greater than preset value, irradiation is on photoresistance RT, the resistance of photoresistance RT is less, make to be added in the threshold voltage that voltage between transistor Q2 base stage and emitter is greater than transistor Q2, transistor Q2 conducting, resistance R 3 is by short circuit, the detection architecture of testing circuit 1 is applied to warning circuit 2 by the voltage between transistor Q2 collector and emitter, in warning circuit 2, because the voltage between transistor Q1 base stage and emitter is less than its threshold voltage, transistor Q1 cut-off, loudspeaker LS does not send chimes of doom.
In the time that the brightness of light is less than preset value, irradiation is on photoresistance RT, the resistance of photoresistance RT is larger, make to be added in the threshold voltage that voltage between transistor Q2 base stage and emitter is less than transistor Q2, transistor Q2 cut-off, resistance R 3 conductings, the detection architecture of testing circuit 1 is applied to warning circuit 2 by the voltage between transistor Q2 collector and emitter; In warning circuit 2, because the voltage between transistor Q1 base stage and emitter is greater than its threshold voltage, transistor Q1 conducting, loudspeaker LS sounds the alarm, and reminds this light fixture of user to decay to preset value, should change as early as possible light fixture.
Preset value of the present invention can rationally determine according to the specific requirement of illumination, and in an embodiment, preset value determines with the dough softening of LED, that is, in the time that the LED of LED light source decays to original 50%, loudspeaker sends chimes of doom, and prompting user changes light fixture.
Above the specific embodiment of the present invention is described in detail, but the present invention is not limited to this embodiment, in the ken possessing those of ordinary skills, can makes many variations.
Claims (6)
1. light decay control circuit, the warning circuit that comprises testing circuit and be electrically connected with testing circuit, it is characterized in that: described testing circuit is mainly made up of photoresistance, transistor and multiple resistance, one end of photoresistance is connected electrically in transistorized base stage, the other end is connected electrically on the positive pole of power supply, transistorized collector and a resistance are connected in series on the positive pole of power supply, and between transistorized collector and emitter, are connected with in parallel a resistance; Described warning circuit is mainly made up of alarm and transistor, and on transistorized emitter electrical connection alarm, collector is connected electrically on the positive pole of power supply, and base stage is electrically connected with testing circuit.
2. light decay control circuit as claimed in claim 1, is characterized in that: the resistance of connecting between the transistorized base stage in described testing circuit and photoresistance.
3. light decay control circuit as claimed in claim 2, is characterized in that: a two ends electric capacity in parallel of described resistance.
4. light decay control circuit as claimed in claim 1, is characterized in that: on the transistorized collector of described warning circuit, be provided with a holding circuit.
5. light decay control circuit as claimed in claim 1, is characterized in that: on the transistorized emitter of described warning circuit, be provided with a holding circuit.
6. the light decay control circuit as described in claim 4 or 5, is characterized in that: described holding circuit is a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210517884.9A CN103852162B (en) | 2012-12-06 | 2012-12-06 | Light decay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210517884.9A CN103852162B (en) | 2012-12-06 | 2012-12-06 | Light decay control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103852162A true CN103852162A (en) | 2014-06-11 |
| CN103852162B CN103852162B (en) | 2016-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210517884.9A Active CN103852162B (en) | 2012-12-06 | 2012-12-06 | Light decay control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103852162B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255166A (en) * | 1991-03-07 | 1992-10-28 | Stephen Charles Roe | Light device |
| CN2696383Y (en) * | 2004-04-06 | 2005-05-04 | 余汉林 | All-weather bag with signalling for help used for traffic safety |
| CN101398992A (en) * | 2008-07-10 | 2009-04-01 | 浙江大学城市学院 | Energy-conserving intelligent all-weather road traffic signpost and control method |
| CN202103903U (en) * | 2011-05-23 | 2012-01-04 | 上海市向明初级中学 | Eye-protecting desk lamp |
-
2012
- 2012-12-06 CN CN201210517884.9A patent/CN103852162B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255166A (en) * | 1991-03-07 | 1992-10-28 | Stephen Charles Roe | Light device |
| CN2696383Y (en) * | 2004-04-06 | 2005-05-04 | 余汉林 | All-weather bag with signalling for help used for traffic safety |
| CN101398992A (en) * | 2008-07-10 | 2009-04-01 | 浙江大学城市学院 | Energy-conserving intelligent all-weather road traffic signpost and control method |
| CN202103903U (en) * | 2011-05-23 | 2012-01-04 | 上海市向明初级中学 | Eye-protecting desk lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103852162B (en) | 2016-05-18 |
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| C14 | Grant of patent or utility model | ||
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Address after: Guangzhou City, Guangdong province 510800 city car Fengshen Avenue South of Huadu District Patentee after: GUANGDONG RAYTON INTELLIGENT OPTO. Co.,Ltd. Address before: 510860, Guangdong province Guangzhou Huadu District Fengshen Road West Ling Industrial Park Patentee before: GUANGZHOU RAYTON LIGHTING TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Large-power LED lamp low light degradation control circuit Effective date of registration: 20190116 Granted publication date: 20160518 Pledgee: China Co. truction Bank Corp Guangzhou green finance reform and innovation pilot area Huadu Branch Pledgor: GUANGDONG RAYTON INTELLIGENT OPTO. Co.,Ltd. Registration number: 2019440000026 |
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Date of cancellation: 20210923 Granted publication date: 20160518 Pledgee: China Co. truction Bank Corp Guangzhou green finance reform and innovation pilot area Huadu Branch Pledgor: GUANGDONG RAYTON INTELLIGENT OPTO. Co.,Ltd. Registration number: 2019440000026 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Light decay control circuit Effective date of registration: 20220816 Granted publication date: 20160518 Pledgee: Guangdong Provincial Bank of Communications Co.,Ltd. Pledgor: GUANGDONG RAYTON INTELLIGENT OPTO. Co.,Ltd. Registration number: Y2022440000186 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20160518 Pledgee: Guangdong Provincial Bank of Communications Co.,Ltd. Pledgor: GUANGDONG RAYTON INTELLIGENT OPTO. Co.,Ltd. Registration number: Y2022440000186 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |