CN203492231U - A brightness automatic control circuit for a LED table lamp - Google Patents
A brightness automatic control circuit for a LED table lamp Download PDFInfo
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- CN203492231U CN203492231U CN201320573887.4U CN201320573887U CN203492231U CN 203492231 U CN203492231 U CN 203492231U CN 201320573887 U CN201320573887 U CN 201320573887U CN 203492231 U CN203492231 U CN 203492231U
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Abstract
The utility model discloses a brightness automatic control circuit for a LED table lamp. The brightness automatic control circuit comprises a first power supply, a second power supply, a pyroelectric infrared sensor, a first resistor to a twentieth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a selective switch, a first triode transistor, a second triode transistor, an optoelectronic coupler, a light emitting diode, and a digital-analog mixing dedicated integrated chip. The brightness automatic control circuit is mainly composed of an induction signal generating module circuit and a light processing module circuit and has advantages of simple structure and low cost. According to different environments, the sensitivity of a sensor can be adjusted by using multiple methods. Therefore, the brightness automatic control circuit may automatically adjust the brightness of the LED table lamp according to light intensity. High cost performance of the brightness automatic control circuit provides the brightness automatic control circuit with widely-popularized value in common families.
Description
Technical field
The utility model relates to a kind of automatic control circuit, relates in particular to a kind of automatic brightness control circuit of LED desk lamp.
Background technology
LED is considered to the lighting source of 21 century, LED is cold light source, light efficiency is high, operating voltage is low, and energy consumption is low, can control well, radiationless, under same brightness, LED energy consumption is 10% of incandescent lamp, 50% of fluorescent lamp, the LED life-span can reach 100,000 hours, 10 times of fluorescent lamp, 100 times of incandescent lamp, along with energy scarcity, electricity price is more and more higher, the raising of the light efficiency of environmental requirement and LED, the incandescent lamp or the fluorescent lamp that with the alternative present desk lamp of LED, generally use, environment friendly and pollution-free, in addition, the spectrum of LED almost all concentrates on visible light frequency band, its luminous efficiency can reach 80～90%, and what the light source body in traditional desk lamp was used is alternating current, so can produce the stroboscopic of 100-120 time each second, LED lamp is used DC powered, can not produce scintillation, protection eyes, can obtain the light environment of " soft ", in identical degree of intelligence, the Intelligent control electric line structure of LED desk lamp is now too complicated, cost is higher, be not suitable for popularizing in each average family.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem the automatic brightness control circuit of the LED desk lamp that a kind of cost performance is high.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises the first power supply, second source, pyroelectric infrared sensor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, selector switch, first crystal triode, the second transistor, photoelectrical coupler, light-emitting diode and digital-to-analogue are mixed special integrated chip, the cathode power supply end while of described pyroelectric infrared sensor and the first end of described the second resistance, described digital-to-analogue is mixed the positive power source terminal of special integrated chip, described digital-to-analogue is mixed reference voltage and the RESET input of special integrated chip, the trigger control end that described digital-to-analogue is mixed special integrated chip is connected with the positive pole of described the first power supply, the negative electricity source while of described pyroelectric infrared sensor and the first end of described the first electric capacity, the first end of described the 4th electric capacity, the first end of described the 3rd resistance, the first end of described the 5th resistance, the negative pole of described the 5th electric capacity, described digital-to-analogue is mixed the negative power end of special integrated chip, the first end of the first end of described the 6th electric capacity and described the 7th electric capacity is connected and ground connection, the signal output part while of described pyroelectric infrared sensor and the second end of described the first electric capacity, the second end of described the 4th resistance is connected with the first in-phase input end that described digital-to-analogue is mixed special integrated chip, the second end of described the second resistance is connected with the first end of described the first resistance, the second end of described the first resistance forbids that with the triggering that the second end of described the 3rd resistance mixes special integrated chip with described digital-to-analogue end is connected simultaneously, the bias current of described digital-to-analogue mixing special integrated chip arranges end and is connected with the second end of described the 5th resistance, the second output that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the 7th resistance with the first end of described the 4th electric capacity simultaneously, the second end while of described the 4th electric capacity and the second end of described the 7th resistance, the first end of described the 6th resistance is connected with the second reversed-phase output that described digital-to-analogue is mixed special integrated chip, the second end of described the 6th resistance is connected with the positive pole of described the second electric capacity, described digital-to-analogue is mixed the first inverting input while of special integrated chip and the first end of described the 8th resistance, the first end of described the 9th resistance is connected with the first end of described the 3rd electric capacity, the second end while of described the 8th resistance and the negative pole of described the second electric capacity, the second end of described the 3rd electric capacity is connected with the first output that described digital-to-analogue is mixed special integrated chip, the second end of described the 9th resistance is connected with the positive pole of described the 5th electric capacity, the very first time adjustable side that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the tenth resistance, the second end of described the tenth resistance is connected with the second end of described the 6th electric capacity with the second Timing end of described digital-to-analogue mixing special integrated chip simultaneously, described digital-to-analogue is mixed the 3rd Timing end while of special integrated chip and the first end of described the 11 resistance, the first end of described the 12 resistance, the first end of described the 13 resistance is connected with the second end of described the 7th electric capacity, the 4th Timing end that described digital-to-analogue is mixed special integrated chip is connected with the first end of described selector switch, the second end of described selector switch is connected with the second end of described the 11 resistance, the 3rd end of described selector switch is connected with the second end of described the 12 resistance, the 4th end of described selector switch is connected with the second end of described the 13 resistance, the control signal output that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the 14 resistance, the second end of described the 13 resistance is connected with the base stage of described first crystal triode with the first end of described the 15 resistance simultaneously, the second end of described the 15 resistance is connected with the emitter of described first crystal triode and ground connection, the collector electrode of described first crystal triode is connected with the negative pole of described photoelectrical coupler, the positive pole of described photoelectrical coupler is connected with the first end of described the 16 resistance, the second end of described the 16 resistance is connected with the positive pole of described second source, the emitter of described photoelectrical coupler is connected with the collector electrode of described the second transistor, the emitter of described the second transistor is connected with the first end of described the 17 resistance, the second end ground connection of described the 17 resistance, the base stage of described the second transistor is connected with the first end of described the 20 resistance with the first end of described the 19 resistance simultaneously, the second end ground connection of described the 20 resistance, the second end of described the 19 resistance is connected with the first end of described the 18 resistance, the collector electrode of described photoelectrical coupler is connected with the negative pole of described light-emitting diode, the anodal of described light-emitting diode is connected with the second end of described the 18 resistance with the positive pole of described second source simultaneously.
Further, described the first resistance and described the 19 resistance are variable resistor, and described the 3rd resistance and described the 20 resistance are photo resistance.
Further, described the second electric capacity and described the 5th electric capacity are polar capacitor.
The beneficial effects of the utility model are:
The utility model is mainly divided into induced signal generation module circuit and light processing module circuit, simple in structure, with low cost, according to different environment, the sensitivity of its transducer can regulate by several different methods, can automatically regulate according to the power of light the brightness of LED desk lamp, high performance-price ratio to make the utlity model has the value of extensively promoting in average family.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, utility model comprises the first power supply, second source, pyroelectric infrared sensor IC, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, selector switch SA, first crystal triode BG1, the second transistor BG2, photoelectrical coupler OC, light-emitting diode VD and digital-to-analogue are mixed special integrated chip U, the first resistance R 1 and the 19 resistance R 19 are variable resistor, the 3rd resistance R 3 and the 20 resistance R 20 are photo resistance, the second capacitor C 2 and the 5th capacitor C 5 are polar capacitor, the cathode power supply end while of pyroelectric infrared sensor IC and the first end of the second resistance R 2, digital-to-analogue is mixed the positive power source terminal 11 of special integrated chip U, digital-to-analogue is mixed reference voltage and the RESET input 8 of special integrated chip U, the trigger control end 1 that digital-to-analogue is mixed special integrated chip U is connected with the positive pole of the first power supply, the negative electricity source while of pyroelectric infrared sensor IC and the first end of the first capacitor C 1, the first end of the 4th capacitor C 4, the first end of the 3rd resistance R 3, the first end of the 5th resistance R 5, the negative pole of the 5th capacitor C 5, digital-to-analogue is mixed the negative power end 7 of special integrated chip U, the first end of the first end of the 6th capacitor C 6 and the 7th capacitor C 7 is connected and ground connection, the signal output part while of pyroelectric infrared sensor IC and the second end of the first capacitor C 1, the second end of the 4th resistance R 4 is connected with the first in-phase input end 14 that digital-to-analogue is mixed special integrated chip U, the second end of the second resistance R 2 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 forbids holding 9 to be connected with the triggering that the second end of the 3rd resistance R 3 mixes special integrated chip U with digital-to-analogue simultaneously, the bias current of digital-to-analogue mixing special integrated chip U arranges end 10 and is connected with the second end of the 5th resistance R 5, the second amplifier output 12 that digital-to-analogue is mixed special integrated chip U is connected with the first end of the 7th resistance R 7 with the first end of the 4th capacitor C 4 simultaneously, the second end while of the 4th capacitor C 4 and the second end of the 7th resistance R 7, the first end of the 6th resistance R 6 is connected with the second reversed-phase output 13 that digital-to-analogue is mixed special integrated chip U, the second end of the 6th resistance R 6 is connected with the positive pole of the second capacitor C 2, digital-to-analogue is mixed the first 15 whiles of inverting input of special integrated chip U and the first end of the 8th resistance R 8, the first end of the 9th resistance R 9 is connected with the first end of the 3rd capacitor C 3, the second end while of the 8th resistance R 8 and the negative pole of the second capacitor C 2, the second end of the 3rd capacitor C 3 is connected with the first amplifier output 16 that digital-to-analogue is mixed special integrated chip U, the second end of the 9th resistance R 9 is connected with the positive pole of the 5th capacitor C 5, the very first time adjustable side 6 that digital-to-analogue is mixed special integrated chip U is connected with the first end of the tenth resistance R 10, the second end of the tenth resistance R 10 is connected with the second end of the 6th capacitor C 6 with the second Timing end 5 of digital-to-analogue mixing special integrated chip U simultaneously, digital-to-analogue is mixed the 3rd 4 whiles of Timing end of special integrated chip U and the first end of the 11 resistance R 11, the first end of the 12 resistance R 12, the first end of the 13 resistance R 13 is connected with the second end of the 7th capacitor C 7, the 4th Timing end 3 that digital-to-analogue is mixed special integrated chip U is connected with the first end of selector switch SA, the second end of selector switch SA is connected with the second end of the 11 resistance R 11, the 3rd end of selector switch SA is connected with the second end of the 12 resistance R 12, the 4th end of selector switch SA is connected with the second end of the 13 resistance R 13, the control signal output 2 that digital-to-analogue is mixed special integrated chip U is connected with the first end of the 14 resistance R 14, the second end of the 13 resistance R 13 is connected with the base stage of first crystal triode BG1 with the first end of the 15 resistance R 15 simultaneously, the second end of the 15 resistance R 15 is connected with the emitter of first crystal triode BG1 and ground connection, the collector electrode of first crystal triode BG1 is connected with the negative pole of photoelectrical coupler OC, the positive pole of photoelectrical coupler OC is connected with the first end of the 16 resistance R 16, the second end of the 16 resistance R 16 is connected with the positive pole of second source, the emitter of photoelectrical coupler OC is connected with the collector electrode of the second transistor BG2, the emitter of the second transistor BG2 is connected with the first end of the 17 resistance R 17, the second end ground connection of the 17 resistance R 17, the base stage of the second transistor BG2 is connected with the first end of the 20 resistance R 20 with the first end of the 19 resistance R 19 simultaneously, the second end ground connection of the 20 resistance R 20, the second end of the 19 resistance R 19 is connected with the first end of the 18 resistance R 18, the collector electrode of photoelectrical coupler OC is connected with the negative pole of light-emitting diode VD, the anodal of light-emitting diode VD is connected with the second end of the 18 resistance R 18 with the positive pole of second source simultaneously.
The utility model is mainly divided into induced signal generation module circuit and light processing module circuit, simple in structure, with low cost, and the model that wherein digital-to-analogue mixing special integrated chip U selects is BISS0001, and the model that pyroelectric infrared sensor IC selects is RE200B.Induced signal generation module main circuit will be by pyroelectric infrared sensor IC, signal amplification circuit, digital-to-analogue mixes special integrated chip U and four parts of delay circuit form, the power supply of pyroelectric infrared sensor IC employing+5V source of stable pressure, its output signal voltage is very faint, be generally 10-20mV, output signal frequency is 0.1Hz-10Hz, in figure, the 4th resistance R 4 is the source resistance of pyroelectric infrared sensor IC (claiming again adjustment of sensitivity resistance), its effect is the sensitivity of adjusting pyroelectric infrared sensor IC, the effect of the first capacitor C 1 is filtering pyroelectric infrared sensor IC output signal medium-high frequency interference sections, in actual applications, usually there will be the insensitive situation of transducer, even often there is false triggering, in order to improve pyroelectric infrared sensor IC, experience ultrared sensitivity, conventionally to before pyroelectric infrared sensor IC, add paraboloidal or the hemispheric Fresnel lens of assembly set, will be to the first capacitor C 1 if effect is still bad, the 4th resistance R 4 is adjusted.Light processing module main circuit will be by two NPN type triode first crystal triode BG1 and the second transistor BG2, a photoelectrical coupler OC, a photo resistance R20, LED lamp light-emitting diode VD and some resistance form, when digital-to-analogue is mixed a high level of special integrated chip U output, it is luminous that light-emitting diode in photoelectrical coupler OC has electric current to flow through, phototriode is subject to photoconduction to lead to brightness regulating circuit, LED lamp light-emitting diode VD starts luminous, photo resistance R20 is contained in a removable probe, while using desk lamp, this probe is placed in desk lamp illumination range, for automatically regulating the brightness of LED.
Claims (3)
1. the automatic brightness control circuit of a LED desk lamp, it is characterized in that: comprise the first power supply, second source, pyroelectric infrared sensor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, selector switch, first crystal triode, the second transistor, photoelectrical coupler, light-emitting diode and digital-to-analogue are mixed special integrated chip, the cathode power supply end while of described pyroelectric infrared sensor and the first end of described the second resistance, described digital-to-analogue is mixed the positive power source terminal of special integrated chip, described digital-to-analogue is mixed reference voltage and the RESET input of special integrated chip, the trigger control end that described digital-to-analogue is mixed special integrated chip is connected with the positive pole of described the first power supply, the negative electricity source while of described pyroelectric infrared sensor and the first end of described the first electric capacity, the first end of described the 4th electric capacity, the first end of described the 3rd resistance, the first end of described the 5th resistance, the negative pole of described the 5th electric capacity, described digital-to-analogue is mixed the negative power end of special integrated chip, the first end of the first end of described the 6th electric capacity and described the 7th electric capacity is connected and ground connection, the signal output part while of described pyroelectric infrared sensor and the second end of described the first electric capacity, the second end of described the 4th resistance is connected with the first in-phase input end that described digital-to-analogue is mixed special integrated chip, the second end of described the second resistance is connected with the first end of described the first resistance, the second end of described the first resistance forbids that with the triggering that the second end of described the 3rd resistance mixes special integrated chip with described digital-to-analogue end is connected simultaneously, the bias current of described digital-to-analogue mixing special integrated chip arranges end and is connected with the second end of described the 5th resistance, the second output that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the 7th resistance with the first end of described the 4th electric capacity simultaneously, the second end while of described the 4th electric capacity and the second end of described the 7th resistance, the first end of described the 6th resistance is connected with the second reversed-phase output that described digital-to-analogue is mixed special integrated chip, the second end of described the 6th resistance is connected with the positive pole of described the second electric capacity, described digital-to-analogue is mixed the first inverting input while of special integrated chip and the first end of described the 8th resistance, the first end of described the 9th resistance is connected with the first end of described the 3rd electric capacity, the second end while of described the 8th resistance and the negative pole of described the second electric capacity, the second end of described the 3rd electric capacity is connected with the first output that described digital-to-analogue is mixed special integrated chip, the second end of described the 9th resistance is connected with the positive pole of described the 5th electric capacity, the very first time adjustable side that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the tenth resistance, the second end of described the tenth resistance is connected with the second end of described the 6th electric capacity with the second Timing end of described digital-to-analogue mixing special integrated chip simultaneously, described digital-to-analogue is mixed the 3rd Timing end while of special integrated chip and the first end of described the 11 resistance, the first end of described the 12 resistance, the first end of described the 13 resistance is connected with the second end of described the 7th electric capacity, the 4th Timing end that described digital-to-analogue is mixed special integrated chip is connected with the first end of described selector switch, the second end of described selector switch is connected with the second end of described the 11 resistance, the 3rd end of described selector switch is connected with the second end of described the 12 resistance, the 4th end of described selector switch is connected with the second end of described the 13 resistance, the control signal output that described digital-to-analogue is mixed special integrated chip is connected with the first end of described the 14 resistance, the second end of described the 13 resistance is connected with the base stage of described first crystal triode with the first end of described the 15 resistance simultaneously, the second end of described the 15 resistance is connected with the emitter of described first crystal triode and ground connection, the collector electrode of described first crystal triode is connected with the negative pole of described photoelectrical coupler, the positive pole of described photoelectrical coupler is connected with the first end of described the 16 resistance, the second end of described the 16 resistance is connected with the positive pole of described second source, the emitter of described photoelectrical coupler is connected with the collector electrode of described the second transistor, the emitter of described the second transistor is connected with the first end of described the 17 resistance, the second end ground connection of described the 17 resistance, the base stage of described the second transistor is connected with the first end of described the 20 resistance with the first end of described the 19 resistance simultaneously, the second end ground connection of described the 20 resistance, the second end of described the 19 resistance is connected with the first end of described the 18 resistance, the collector electrode of described photoelectrical coupler is connected with the negative pole of described light-emitting diode, the anodal of described light-emitting diode is connected with the second end of described the 18 resistance with the positive pole of described second source simultaneously.
2. the automatic brightness control circuit of LED desk lamp according to claim 1, is characterized in that: described the first resistance and described the 19 resistance are variable resistor, and described the 3rd resistance and described the 20 resistance are photo resistance.
3. the automatic brightness control circuit of LED desk lamp according to claim 1, is characterized in that: described the second electric capacity and described the 5th electric capacity are polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573887.4U CN203492231U (en) | 2013-09-16 | 2013-09-16 | A brightness automatic control circuit for a LED table lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573887.4U CN203492231U (en) | 2013-09-16 | 2013-09-16 | A brightness automatic control circuit for a LED table lamp |
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| Publication Number | Publication Date |
|---|---|
| CN203492231U true CN203492231U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320573887.4U Expired - Fee Related CN203492231U (en) | 2013-09-16 | 2013-09-16 | A brightness automatic control circuit for a LED table lamp |
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| CN (1) | CN203492231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385748A (en) * | 2016-09-12 | 2017-02-08 | 河南师范大学 | Novel light-controlled energy saving lamp device |
-
2013
- 2013-09-16 CN CN201320573887.4U patent/CN203492231U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385748A (en) * | 2016-09-12 | 2017-02-08 | 河南师范大学 | Novel light-controlled energy saving lamp device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20140916 |
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| EXPY | Termination of patent right or utility model |