CN1162241A - Lamp control circuit with selectable brightness level - Google Patents
Lamp control circuit with selectable brightness level Download PDFInfo
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- CN1162241A CN1162241A CN 97100415 CN97100415A CN1162241A CN 1162241 A CN1162241 A CN 1162241A CN 97100415 CN97100415 CN 97100415 CN 97100415 A CN97100415 A CN 97100415A CN 1162241 A CN1162241 A CN 1162241A
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- 238000001514 detection method Methods 0.000 claims abstract description 45
- 230000003287 optical effect Effects 0.000 claims description 40
- 230000007613 environmental effect Effects 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 11
- 230000007935 neutral effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 206010034960 Photophobia Diseases 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
A novel control device is used for switching on or off a lamp according to the environment brightness. Said device (10) comprises a light detection circuit (20) equipped with a photoelectric tube (36) and a Schmitt trigger (20, 70, 130), which are used for switching on or off a lamp (22) through a switchgear (18, 102, 126), responding to the environment brightness irradiating at the photoelectric tube (36). Said device (10) comprises further a mechanism capable of recovering manual replacement (72, 74, 76, 78, 80) and allowing selection of two lamp luminance levels.
Description
The present invention relates to be used for controlling the circuit of lamp according to the environment bright level.
All the time need economic illuminator and wish to save energy simultaneously, this has obtained progress both ways.Invent more effective more high efficiency luminous form, mainly comprised fluorescent lamp.This lamp had passed through many technological improvements in recent years, can find that usually whole building, building has only fluorescent lighting.Obtaining the other progress aspect the improvement of the automatic switching system of fluorescent lamp and other lamps.These system designs are used for avoiding unnecessary energy consumption when the environment bright level makes that artificial light is unnecessary, or reduce the artificial light level when the environment bright level only is lower than the optimal light intensity level.Many existing automatic switching systems are arranged.They comprise the mechanical type optical sensor that the heating element that is fixed on the bimetal spring is installed, and it mechanically starts a switch.These devices lack sensitivity, and fluctuation of service.
We know, provide the night lighting equipment of being with the photoelectric tube in the plug-in unit that inserts wall plug usually, and it comes opening and closing according to environment bright.Yet they lack precision and have bright incandescent lamp bulb and can not use, because photoelectric tube will inevitably respond light, cause vibration.
A kind of simple form of automatic switch is a timing switch.These devices are passive types, and open or close lamp at the fixed time by simple programming.Their dumb and their programs must be upgraded in the different time in every year, so that distinguish lighting condition.Their program may be lost under the situation of outage.
Developed more complicated apparatus (for example referring to United States Patent (USP) 5404080).Yet these devices are high complexity all usually, require transformer, complicated optically focused level, and complicated function is provided, and these make this device for preparing to be incorporated into existing lamp or the too expensive and heaviness too for wider application together.
Thereby, the purpose of this invention is to provide a kind of lamp control circuit, it will increase the energy efficiency of lamp by the device that cheap automatic shape lamp is housed.
The present invention who has developed uses fluorescent lamp to use, but it is evident that to one skilled in the art the present invention is not necessarily limited to this lamp.
According to the present invention, a kind of control device to lamp is provided, comprise an optical detection circuit, be used for turning on light or turning off the light by switching device according to the environment bright that is radiated on the photo-detector, it is characterized in that first environment intensity threshold (Lx) is greater than second environment intensity threshold (Ly), wherein close this lamp for the ambient light intensity that responds increase and turn on this lamp for the ambient light intensity that response reduces, prevent that thus switching device is owing to the influence of the light of the lamp generation of being surveyed by photo-detector is vibrated at the second threshold value glazing detection circuit at first threshold glazing detection circuit.
Preferably, the optical detection circuit is equipped with a Schmidt trigger.
Preferably, photo-detector is positioned at the Kou Chu that takes off of lamp.
Preferably, the optical detection circuit is equipped with one and manually substitutes device, is used for turning on the light when the environment bright level is higher than first threshold (Lx).
Preferably, but the hand reset of manual override device.
Preferably, the optical detection circuit is equipped with lamp brightness and selects circuit.
Preferably, generator allows to select two lamp intensity levels.
Preferably, by in the high-high brightness chosen period to this device deenergization then energized can select in two intensity levels second thus.
Preferably, described photo-detector comprises a photoelectric tube.
The embodiment that invention will be further ex-plained with reference to the appended drawings, wherein:
Fig. 1 is the circuit diagram that the solid-state electric control circuit of a switching device and an optical detection circuit is housed;
Fig. 2 is the circuit diagram of optical detection circuit;
Fig. 3 is the circuit diagram that another embodiment of an optical detection circuit that manually substitutes is installed;
Fig. 4 is when not having the optical detection circuit, the circuit diagram of another embodiment of lamp control circuit;
Fig. 5 is the circuit diagram of optical detection circuit shown in Figure 4;
Fig. 6 is the schematic diagram that the fluorescent lamp accessory of lamp control circuit is housed.
In a preferred embodiment of the invention, Fig. 1 usually shows lamp control circuit 10.AC power links to each other with live wire end 12 with neutral end 11.Neutral end 11 links to each other with the negative pole of point 13,220 μ F electric capacity 14 and 6.2V Zener diode 16.The positive level ground connection of the other end of electric capacity 14 and Zener diode 16.Neutral end 11 also with the MT of the triac (triac) 18 of 4A
1Link to each other.The grid end of switch 18 links to each other with optical detection circuit 20 through the output 21 of optical detection circuit 20.The MT of switch 18
2End links to each other with an end of lamp 22.This lamp is preferably fluorescent lamp but also any type of electric light.The other end of lamp 22 links to each other with first end of live wire end 12 with 27.3k Ω resistance 24.The other end of resistance 24 links to each other with the negative pole of 1N4002 diode 26.The positive level ground connection of diode 26.
Utilize resistance 24, diode 26, Zener diode 16 and electric capacity 14 to constitute power supply at point 13 places.The voltage at point 13 places approximates Zener avalanche voltage greatly.
The output 21 of optical detection circuit 20 is high or low.When this output was low, switch 18 was as short circuit and turn-on lamp 22.When the output 21 of optical detection circuit 20 was high, switch 20 produced open circuit and also cuts out lamp 22.
With reference to Fig. 2, optical detection circuit 20 comprises the power supply 30 of first end that is connected to 1.5k Ω resistance 32, and second end of this resistance links to each other with first end of 100k Ω variable resistor 34.Second end of variable resistor 34 links to each other with first end of Reimann A90.12 photoelectric tube 36 and the anti-phase input of LM393 operational amplifier 38.The second end ground connection of photoelectric tube 36.Power supply 40 links to each other with first end of 47k Ω resistance 42, and the two links to each other first end of second end of this resistance and 47k Ω resistance 44 and the noninverting input of operational amplifier 38.The second end ground connection of resistance 44.The output of operational amplifier 38 links to each other with the noninverting input of operational amplifier 38 through 22k Ω resistance 46.The output of operational amplifier 38 also links to each other with power supply 50 through 56k Ω resistance 48.
Can measure in output place of operational amplifier 38, the output potential of first utmost point of above-mentioned optical detection circuit 20 is high or low.But this point that its output changes between its two energy levels can use the voltage divider of being made up of resistance 32, variable resistor 34 and photoelectric tube 36 to control.Light on inciding photoelectric tube 36 is that for example by day, the resistance of photoelectric tube 36 can be ignored when being in high level attitude.Resistance 32,34,42 and 44 resistance are such, and promptly under these conditions, the reverse inter-input-ing voltage of operational amplifier 38 is lower than the noninverting input voltage of operational amplifier 38.As a result, the output of operational amplifier will be high.When the environment bright level reduced, the resistance of photoelectric tube 36 raise.The reverse inter-input-ing voltage of operational amplifier 38 also raises as a result.Its output voltage will become low when reverse inter-input-ing voltage surpasses the noninverting input voltage of operational amplifier 38.As a result, even the environment bright level continues to change, the output of operational amplifier 38 can be assumed to senior attitude or rudimentary attitude.Therefore the first order of optical detection circuit 20 can be used as Schmidt trigger, and the output of operational amplifier 38 will show hysteresis.As a result, the output that the minor swing on the environment bright level will can not cause operational amplifier 38 when the bright level of environment usually increases or reduces is vibrated rapidly between high level attitude and low level attitude.
The output of operational amplifier 38 links to each other with first end of 2.2M Ω resistance 52 and the negative pole of IN4148 diode 54 in addition.Both link to each other the positive level of second end of resistance 52 and diode 54 with first end of 47 μ F electric capacity 56.The second end ground connection of this electric capacity.The positive level of second end of resistance 52 and diode 54 also links to each other with the noninverting input of LM393 operational amplifier 58.Power supply 60 links to each other with first end of 110k Ω resistance 62, and its second end links to each other with the anti-phase input of 100k Ω resistance 64 and operational amplifier 58.The second end ground connection of resistance 64.The output of operational amplifier 58 links to each other with the positive pole of 1N4148 diode 66, and its negative pole links to each other with the noninverting input of operational amplifier 58.It is the moire effect that is used for eliminating in the power supply 60 that diode 66 is installed.The output of operational amplifier 58 links to each other with first end of 1.5k Ω resistance 68 in addition, and its second end constitutes the output 21 of optical detection circuit 20.Point 13 is power supplys of the power supply 30,40,50,60 of optical detection circuit 20.
20 operations of optical detection circuit are as follows.If the environment bright level is low (for example at night) at the beginning, the resistance of photoelectric tube 36 will be high and the output of first operational amplifier 38 will be low.As a result, the output of second operational amplifier also will be low, then switch 18 with conducting, so lamp 22 will be opened.When ambient light level increases (for example when arrive daytime), the resistance of photoelectric tube 36 will descend.The electromotive force of the inverting input of final first operational amplifier 38 will be sufficiently low, so that the output of operational amplifier 38 becomes high.After a short time postponed, (this postpones to be determined by the electric capacity of the resistance of resistance 48,52,62 and 64 and capacitor 56), it is high that the output of second operational amplifier 58 will become.So it is high that the grid end electromotive force of switch 18 will become, this switch will become open circuit thus.Therefore, lamp 22 will be closed.This time delay guarantees that the instantaneous increase (for example being produced by the head lamp of the automobile of passing by on one's way) of environment bright level will can not draw lamp and be closed.
When environment bright level at the beginning high and then when for example the evening draws on and under the situation about descending, this process is opposite basically.
It is slightly different because the effect of the first order of optical detection circuit 20, the light level when carrying out switch rely on the direction that changes.This guarantee when light level when carrying out the necessary level of switch attitude, even the level attitude that light level fluctuation about increases or reduces usually usually, lamp can not open and close rapidly yet.Difference between two light levels that take place to connect and close can be by resistance 46 controls, and the resistance value of resistance 46 is big more, and the difference between these two switch light levels is just more little.
Can wish when switch takes place, to adjust the environment bright level.This can be undertaken by utilizing variable resistor 34 to revise the dividing potential drop that is produced by electricity group 32, variable resistor 34 and photoelectric tube 36.On any concrete environment bright level, the resistance increase of variable resistor 34 will reduce the electromotive force of the inverting input of operational amplifier 38.Lamp 22 will be switched on or close on lower environment bright level as a result.This is useful when requiring to reduce energy use.
Second embodiment of optical detection circuit is illustrated among Fig. 3.Optical detection circuit 70 is equipped with optical detection circuit 20, although variable resistor 34 has maximum resistance 50k Ω in the present embodiment.In optical detection circuit 70, the output of second operational amplifier 58 links to each other with the positive pole of MCR102 semiconductor controlled rectifier (SCR) 72.The minus earth of semiconductor controlled rectifier (SCR) 72.Power supply 74 links to each other with first end of 3.3 μ F electric capacity 76, and second end of this electric capacity links to each other with the grid end of semiconductor controlled rectifier (SCR) 72.Point 13 also is the power supply of power supply 74.Second end of electric capacity 76 also links to each other with the negative pole of 1N4148 diode 78 and first end of 22k Ω resistance 80.The second end ground connection of the positive pole of diode 78 and resistance 80.
These additional circuit elements provide the optical detection circuit of band manual override.Even this substitute be used for the environment bright level normally indicator light 22 this close and will open by lamp 22.The output of second operational amplifier 58 normally is high under these conditions.Connect if the power supply of supply circuit disconnects then, these two operations were carried out within 0.5 to 1.5 second mutually, and electric capacity 76 will produce a pulse, and it will cause semiconductor controlled rectifier (SCR) 72 conductings, so the output of operational amplifier 58 will become low.So as mentioned above, lamp 22 will be opened.
Manual override can two kinds of methods be restored.This can then connect by deenergization but manually carry out greater than five seconds at interval between these two operations.,, will restore automatically when promptly second operational amplifier 58 will become low in normal working conditions when environment bright on every side is reduced to a level attitude.This will make the electromotive force of positive pole of semiconductor controlled rectifier (SCR) 72 low, and semiconductor controlled rectifier (SCR) 72 will become open circuit as a result.So optical detection circuit 70 will turn back to normal mode of operation.
The third embodiment of the present invention is illustrated among Fig. 4 and Fig. 5.The brightness of lamp might be arranged on one of two level attitudes in this embodiment, one is normal brightness, and another is equivalent to 50% of current energy consumption.The lamp control circuit 90 of this embodiment is illustrated among Fig. 4, but does not comprise the optical detection circuit.AC power links to each other with live wire end 94 with neutral end 92.Neutral end 92 links to each other with the negative pole of point 96,440 μ F electric capacity 98 and 6.2V Zener diode 100.The plus earth of the other end of electric capacity 98 and Zener diode 100.Neutral end 92 also with the MT of 4A triac 102 (triac)
1Link to each other its MT
2End links to each other with lamp 104 with previous embodiments.
The other end of lamp 104 links to each other with first end of live wire end 94 with 27.3k Ω resistance 106.The other end of resistance 106 links to each other with the negative pole of 1N4002 diode 108.The positive level ground connection of diode 108.Neutral end 92 also links to each other with first end of 47 μ F electric capacity 110, and its second end links to each other with first end of DB3 diac 112.Second end of diac 112 links to each other with the grid end of switch 102.Neutral end 92 also with the MT of 4A switch 114
1Link to each other with first end of 100 μ F electric capacity 116.The MT of switch 114
2Link to each other with first end of 10k Ω resistance 118 with second end of electric capacity 116, its second end links to each other with first end of switch 112.The MT of switch 114
2Also link to each other with first end of 50k Ω variable resistor 120 with second end of electric capacity 116, its second end is through the MT of 5.1k Ω resistance 122 with switch 102
2Link to each other.Optical detection circuit 130 (Fig. 5) links to each other with 126 places at point 124, goes through below.
The optical detection circuit 130 of present embodiment is seen shown in Figure 5.Circuit 130 is equipped with optical detection circuit 20 (see figure 2)s, but variable resistor 34 has maximum resistance 50k Ω in the present embodiment, and the resistance 68 that links to each other with the output of second operational amplifier 58 in optical detection circuit 20 replaces with 47k Ω resistance 132 in optical detection circuit 130.Second end of resistance 132 links to each other with the grid of BC337 transistor 134.The collector electrode of transistor 134 links to each other with 50% output 136 through 1.5k Ω resistance 138.The grounded emitter of transistor 134.
The output of second operational amplifier 58 also links to each other with 33 μ F electric capacity 140, and this electric capacity links to each other with power supply 142 through 470k Ω resistance 144 then, and links to each other with the grid of BC337 transistor 146 through 560k Ω resistance 148.The current collection level of transistor 146 links to each other with 100% output 150 through 1.5k Ω resistance 152.The grounded emitter of transistor 146.
The output of second operational amplifier 58 also links to each other with first end of 1k Ω resistance 154, and second end of this resistance links to each other with 100% output 156 through 510k Ω resistance 153.Second end of resistance 154 links to each other with the emitter of BC327 transistor 160 in addition, and its collector electrode connects power supply 162.The two links to each other the grid of transistor 160 through the negative pole of 47k Ω resistance 164 and 22 μ F electric capacity 166 and MCR102 semiconductor controlled rectifier (SCR) 168.The positive level of semiconductor controlled rectifier (SCR) 168 connects power supply 170, and its negative pole is through 5.1k Ω resistance 172 ground connection simultaneously.The negative pole of the grid of semiconductor controlled rectifier (SCR) 168 and 1N4148 diode 174 joins, and the positive level of this diode connects power supply 176 through 3.3 μ F electric capacity 178, and through 47k Ω resistance 180 ground connection.
The power supply 30,40,50,60,142,162,170 and 176 of optical detection circuit 130 all is connected to the power supply point 96 of lamp control circuit 90.100% output 150 and 156 is joined with the grid end 124 of switch 102, and the grid end 126 of 50% output 136 and switch 114 joins.
The operation of this embodiment of the present invention and second embodiment are similar.When the power supply of supply circuit was at first connected, semiconductor controlled rectifier (SCR) 168 was triggered and cuts out, and caused that resistance 154 and 158 s' electromotive force uprises.Owing to transistor 146 independent conductings, switch 102 provides 100% electric current to lamp 104 when dark.Yet 100% electric current expends and continues only several seconds, and this is decided by resistance 144 and electric capacity 140.The output at 150 places stops then, supplies with the electric current of lamp 104 and falls 50% of its former value.
Yet, if disconnecting, then in 0.5 to 1.5 second time, connects the power supply of supply circuit, semiconductor controlled rectifier (SCR) 168 is triggered and cuts out, and can not influence 100% output 156 like this.Thereby at the dark period lamp all the time in 100% brightness.
Fig. 6 is the schematic diagram of lamp control circuit, and other conventional fluorescent lamp fitting is installed.This fluorescent lamp accessory 182 by fluorescent tube 184, take off mouthful 186 and two recesses 188 and 190 and be equipped with.The end that 194 (corresponding to variable resistors 34) are positioned at this accessory is regulated in photoelectric tube 192 and sensitivity.
Therefore the invention provides a kind of simple, cheap device, it can be integrated in the conventional fluorescent of use standard ballast, and does not require other electric wire.It can be positioned at the Kou Chu that takes off of lamp fitting.It is small and exquisite and is suitable for a large amount of productions, but still has several important feature, comprises variable light sensitivity, manual override and can select brightness.Variable sensitivity control also can be in the Kou Chu that takes off of lamp fitting.The hysteresis of circuit guarantees that circuit can not produce vibration owing to the influence of the light of being surveyed by photo-detector that lamp produced or the inhomogeneous variation on the surround lighting source class.
Claims (16)
1, a kind of to lamp (22,104) control device (10,90), comprise an optical detection circuit (20,70,130), be used for passing through switching device (18 according to the environment bright that is radiated on the photo-detector (36), 102,126) turn on light or turn off the light (22,104), it is characterized in that first environment intensity threshold (Lx) is greater than second environment intensity threshold (Ly), wherein close this lamp (22 for the ambient light intensity that response increases at first threshold glazing detection circuit (20,70,130), 104) and at the second threshold value glazing detection circuit and (20,70,130) ambient light intensity that reduces for response is turned on this lamp (22,104), prevent switching device (18 thus, 102,126) owing to produced vibration by the influence of the light of lamp (22, the 104) generation of photo-detector (36) detection.
2,, it is characterized in that described optical detection circuit (20,70,130) is equipped with a Schmidt trigger as the desired control device of claim 1 (10,90) to lamp (22,104).
3,, it is characterized in that take off mouthful (186) that photo-detector (36) is installed in lamp (22,104) locate as the desired control device of one of above-mentioned claim (10,90) to lamp (22,104).
4, as any one is desired to lamp (22 in the above-mentioned claim, 104) control device (10,90), it is characterized in that optical detection circuit (20,70,130) ambient light intensity that increases for response is closed lamp (22,104) after the time postpones, owing to the instantaneous increase of environmental light intensity lamp (22,104) is closed in dark period so that prevent.
5, desired as in the above-mentioned claim any one to lamp (22,104) control device (10,90), it is characterized in that optical detection circuit (70) is equipped with one and manually substitutes device (72,74,76,78,80), be used for when the environment bright level surpasses first threshold (Lx), turn on the light (22,104).
6,, it is characterized in that operating described manual override device (72,74,76,78,80) by in phase maximum time, disconnecting the power supply of then connecting this device (10,90) earlier as the desired control device of claim 5 (10,90) to lamp (22,104).
7,, it is characterized in that manual override device (72,74,76,78,80) can manually restore as claim 5 or the desired control device of claim 6 (10,90) to lamp (22,104).
8,, it is characterized in that then connecting this device (10 by disconnecting earlier as the desired control device of claim 7 (10,90) to lamp (22,104), 90) power supply, and two action one minimum time time limits of interval, the device of hand reset manual override thus (72,74,76,78,80).
9,, it is characterized in that manual override device (72,74,76,78,80) can restore automatically as any one desired control device (10,90) in the claim 5 to 8 to lamp (22,104).
10, as the desired control device to lamp (22,104) of claim 9 (10,90), manual override device (72,74,76,78,80) restores automatically when it is characterized in that under the environment bright level is fallen first threshold (Lx).
11, any one desired control device to lamp (22,104) (10,90) in the claim as described above is characterized in that optical detection circuit (130) is equipped with a lamp brightness and selects circuit.
12,, it is characterized in that the device of being installed allows to select two lamp intensity levels as the desired control device of claim 11 (10,90) to lamp (22,104).
13,, it is characterized in that to select in two intensity levels second by in the high-high brightness select time time limit, disconnecting the power supply then connect this device (10,90) as the desired control device of claim 12 (10,90) to lamp (22,104).
14, any one desired control device to lamp (22,104) (10,90) in the claim as described above is characterized in that described photo-detector (36) comprises a photoelectric tube.
15, any one desired control device to lamp (22,104) (10,90) in the claim as described above is characterized in that optical detection circuit (20,70,130) is equipped with first threshold (Lx) and second threshold value (Ly) adjusting device (34).
16,, it is characterized in that described adjusting device (34) comprises a variable resistor as the desired control device of claim 15 (10,90) to lamp (22,104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97100415 CN1162241A (en) | 1996-01-24 | 1997-01-24 | Lamp control circuit with selectable brightness level |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI9600266 | 1996-01-24 | ||
| CN 97100415 CN1162241A (en) | 1996-01-24 | 1997-01-24 | Lamp control circuit with selectable brightness level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162241A true CN1162241A (en) | 1997-10-15 |
Family
ID=5165035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97100415 Pending CN1162241A (en) | 1996-01-24 | 1997-01-24 | Lamp control circuit with selectable brightness level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8301342B2 (en) | 2007-11-16 | 2012-10-30 | Jtekt Corporation | Electric power steering apparatus |
-
1997
- 1997-01-24 CN CN 97100415 patent/CN1162241A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8301342B2 (en) | 2007-11-16 | 2012-10-30 | Jtekt Corporation | Electric power steering apparatus |
| CN101772449B (en) * | 2007-11-16 | 2013-06-26 | 株式会社捷太格特 | Electric power steering apparatus |
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