CN203492241U - Novel LED dimming module - Google Patents
Novel LED dimming module Download PDFInfo
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- CN203492241U CN203492241U CN201320607356.2U CN201320607356U CN203492241U CN 203492241 U CN203492241 U CN 203492241U CN 201320607356 U CN201320607356 U CN 201320607356U CN 203492241 U CN203492241 U CN 203492241U
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Abstract
The utility model provides a novel LED dimming module comprising a DC power circuit, a bleeder circuit, a dimming circuit and a comparator which are successively connected, and an output terminal of the dimming circuit is connected with a negative input terminal of the comparator; and the novel LED dimming module also comprises a reference voltage input circuit, an output terminal of the reference voltage input circuit is connected with a positive input terminal of the comparator, and the dimming circuit comprises a thyristor and a capacitor which are in parallel connection. With the novel LED dimming module, an LED lamp also has a dimming function when a power supply is a DC power supply. The module is simple in structure and low in cost, frequency and duty ratio of a PWM wave output by an output terminal of the comparator can be effectively adjusted by adjusting a reference voltage, and LED simulated dimming can also be achieved by adjusting resistance, accessed in a circuit, of a divider resistor.
Description
Technical field
The utility model relates to lighting field, refers to especially a kind of New LED light-adjusting module.
Background technology
Pulse light modulation mode for direct current input, essential relatively wave producer element, by direct current incoming level is compared and produces pulse signal for pulse light modulation with comparison ripple, and for the pulse light modulation mode that adopts PWM input signal, pulse light modulation signal is directly followed PWM input signal, therefore without comparing wave producer element.Therefore these two kinds of pulse light modulation modes mutually between and incompatible.The circuit of the pulse light modulation mode of inputting for direct current is not also suitable for the pulse light modulation mode that adopts PWM input signal.
The light fixture of LED class usually needs to relate to light modulation, and the power supply IC of light fixture generally can support PWM dimming function, and the light modulation that we use input is usually the direct voltage of DC, therefore cannot realize 0V-10VDC to transformation and the dimming function of pwm signal.
Utility model content
The utility model proposes a kind of New LED light-adjusting module, solved the problem that direct voltage in prior art cannot directly be realized light modulation.
The technical solution of the utility model is achieved in that
A kind of New LED light-adjusting module, comprise: the DC power supply circuit, bleeder circuit, light adjusting circuit and the comparator that connect successively, the output of light adjusting circuit is connected with the negative input of comparator, also comprise reference voltage input circuit, the output of reference voltage input circuit is connected with the positive input of comparator, and light adjusting circuit comprises thyristor and the electric capacity of parallel join.
Preferably, the magnitude of voltage of DC power supply circuit input is the direct voltage that is greater than 15V.
Preferably, DC power supply circuit comprises DC power supply VIN and the diode D1 connecting with power supply VIN successively and electric capacity E1, the other end ground connection of electric capacity E1, the negative pole of diode D1 is connected with resistance R 1, and the other end of resistance R 1 is respectively with voltage-stabiliser tube Z1 and electric capacity E2 parallel join and be connected to ground.
Preferably, light adjusting circuit comprises thyristor Q1 and the capacitor C 1 in parallel with thyristor Q1, and one end of thyristor Q1 is connected to bleeder circuit, and the other end is connected with R5 with resistance R 4, one end ground connection of capacitor C 1, and the other end is connected with the reverse input end of comparator.
Preferably, reference voltage input circuit comprises DC power supply DC and the DC power supply VCC being connected with resistance R 6, and DC power supply DC and VCC are connected to the positive input of comparator by resistance R 7.
Preferably, the voltage of DC power supply DC is 0～10V.
Preferably, comparator adopts LM393 chip.
A kind of New LED light-adjusting module of the present utility model, when power acquisition has dimming function equally with its LED light fixture in the situation of DC power supply.This modular structure is simple, with low cost, by regulating the size of reference voltage, can effectively regulate frequency and the duty ratio of PWM waveform of the output output of comparator, and, by regulating the size of the resistance of divider resistance place in circuit, can also realize the simulation light modulation to LED.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
In figure:
1, DC power supply circuit; 2, bleeder circuit; 3, light adjusting circuit; 4, comparator; 5, reference voltage input circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of New LED light-adjusting module of the present utility model comprises DC power supply circuit 1, bleeder circuit 2 and the light adjusting circuit 3 connecting successively, the output of light adjusting circuit 3 is connected with the negative input of comparator 4, the output of reference voltage input circuit 5 is connected with the positive input of comparator 4, DC power supply circuit 1 is for providing operating voltage to New LED light-adjusting module, and its magnitude of voltage is the direct voltage that is greater than 15V.The triangular wave of the voltage of reference voltage input circuit 5 and light adjusting circuit 3 outputs is compared, when the voltage of triangular wave is less than the voltage of reference voltage input circuit 5, comparator 4 output one high level signals, otherwise output low level signal, therefore produce a pulse width modulation (Pulse Width Modulation, PWM) signal, see through the duty ratio that changes pwm signal, can control between the light emission period of LED path, and according to the length between light emission period, control the luminosity of LED path.
Fig. 2 is a kind of New LED light-adjusting module circuit theory diagrams of the present utility model, diode D1 and electric capacity E1 that DC power supply circuit 1 comprises DC power supply VIN and connects with VIN successively, preferably, the capacitance of E1 is 47 μ F, the other end ground connection of electric capacity E1, the negative pole of diode D1 is connected with resistance R 1, R1 is 510 Ω, the other end of resistance R 1 respectively with voltage-stabiliser tube Z1 and electric capacity E2 parallel join and be connected to ground, wherein VIN is the DC power supply that is greater than 15V, through Z1 voltage-stabiliser tube place, VCC place voltage is 15V, bleeder circuit 2 comprises divider resistance R2 and the R3 connecting successively, the resistance value of resistance R 2 is 10K, the resistance value of resistance R 3 is 20K, after dividing potential drop, voltage is 10V, light adjusting circuit 3 comprises thyristor Q1 and the capacitor C 1 in parallel with thyristor Q1, the capacitance of capacitor C 1 is 4.7nF, wherein one end of thyristor Q1 is connected in the middle of divider resistance R2 and R3, the other end is connected with R5 with resistance R 4, one end ground connection of capacitor C 1 wherein, the other end is connected with the reverse input end of comparator 4, capacitor C 1 is charged by resistance R 4, voltage in capacitor C 1 rises to 10V by 0V index, when voltage reaches 10V, thyristor Q1 opens, voltage in capacitor C 1 becomes 0V, re-start the charging of next round, therefore the voltage in capacitor C 1 is that amplitude is the triangular wave of 10V.Reference voltage input circuit 5 comprises DC power supply DC and the DC power supply VCC being connected with resistance R 6, and power supply DC and VCC are all connected to the positive input of comparator 4 by resistance R 7, and wherein the voltage of power supply DC is 0～10V.Diode in the present embodiment, thyristor, electric capacity and resistance according to them withstand voltage, the resistance to flow valuve of the maximum in each comfortable circuit choose.Preferably, the comparator in the present embodiment adopts LM393 chip, and LM393 built-in chip type has the first voltage comparator and second voltage comparator.
The positive input of the reverse input end of the first voltage comparator and second voltage comparator is connected to reference voltage input circuit 5, the positive input of the first voltage comparator is unsettled, the reverse input end of second voltage comparator is connected with the output of light adjusting circuit 3, reference voltage input circuit 5 provides the first reference voltage to the reverse input end of the first voltage comparator thus, and the positive input to second voltage comparator provides the second reference voltage, when the output voltage of light adjusting circuit 3 is less than the second reference voltage, the square wave of the output output of second voltage comparator is logic " 1 ", and when the output voltage of light adjusting circuit 3 is greater than the second reference voltage, the square wave of the output output of second voltage comparator is logic " 0 ".
Thus, LED light-adjusting module of the present utility model, by regulating the size of reference voltage, can regulate frequency and the duty ratio of PWM waveform of the output output of the second comparator effectively.And, by regulating the size of the resistance of divider resistance R2 and R3 place in circuit, can also realize the simulation light modulation to LED.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (7)
1. a New LED light-adjusting module, it is characterized in that, comprise: the DC power supply circuit, bleeder circuit, light adjusting circuit and the comparator that connect successively, the output of described light adjusting circuit is connected with the negative input of described comparator, also comprise reference voltage input circuit, the output of described reference voltage input circuit is connected with the positive input of described comparator, and described light adjusting circuit comprises thyristor and the electric capacity of parallel join.
2. a kind of New LED light-adjusting module according to claim 1, is characterized in that, the magnitude of voltage of described DC power supply circuit input is the direct voltage that is greater than 15V.
3. a kind of New LED light-adjusting module according to claim 2, it is characterized in that, described DC power supply circuit comprises DC power supply VIN and the diode D1 and the electric capacity E1 that connect with described power supply VIN successively, the other end ground connection of described electric capacity E1, the negative pole of described diode D1 is connected with resistance R 1, and the other end of described resistance R 1 is respectively with voltage-stabiliser tube Z1 and electric capacity E2 parallel join and be connected to ground.
4. a kind of New LED light-adjusting module according to claim 1, it is characterized in that, described light adjusting circuit comprises thyristor Q1 and the capacitor C 1 in parallel with described thyristor Q1, one end of described thyristor Q1 is connected to described bleeder circuit, the other end is connected with R5 with resistance R 4, one end ground connection of described capacitor C 1, the other end is connected with the reverse input end of described comparator.
5. a kind of New LED light-adjusting module according to claim 1, it is characterized in that, described reference voltage input circuit comprises DC power supply DC and the DC power supply VCC being connected with resistance R 6, and described DC power supply DC and VCC are connected to the positive input of described comparator by resistance R 7.
6. a kind of New LED light-adjusting module according to claim 5, is characterized in that, the voltage of described DC power supply DC is 0～10V.
7. according to the arbitrary described a kind of New LED light-adjusting module of claim 1-6, it is characterized in that, described comparator adopts LM393 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320607356.2U CN203492241U (en) | 2013-09-29 | 2013-09-29 | Novel LED dimming module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320607356.2U CN203492241U (en) | 2013-09-29 | 2013-09-29 | Novel LED dimming module |
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| Publication Number | Publication Date |
|---|---|
| CN203492241U true CN203492241U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320607356.2U Expired - Lifetime CN203492241U (en) | 2013-09-29 | 2013-09-29 | Novel LED dimming module |
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| CN (1) | CN203492241U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202385A (en) * | 2015-08-27 | 2015-12-30 | 鲁方菊 | External-power-source LED (light-emitting diode) energy-saving lamp |
| CN108633143A (en) * | 2018-07-18 | 2018-10-09 | 惠州市烁达德高光电科技有限公司 | A kind of light adjusting circuit of LED light |
| CN110267396A (en) * | 2019-06-11 | 2019-09-20 | 惠科股份有限公司 | The negative light adjusting circuit of direct current and display device |
-
2013
- 2013-09-29 CN CN201320607356.2U patent/CN203492241U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202385A (en) * | 2015-08-27 | 2015-12-30 | 鲁方菊 | External-power-source LED (light-emitting diode) energy-saving lamp |
| CN108633143A (en) * | 2018-07-18 | 2018-10-09 | 惠州市烁达德高光电科技有限公司 | A kind of light adjusting circuit of LED light |
| CN110267396A (en) * | 2019-06-11 | 2019-09-20 | 惠科股份有限公司 | The negative light adjusting circuit of direct current and display device |
| CN110267396B (en) * | 2019-06-11 | 2021-10-01 | 惠科股份有限公司 | Direct current negative dimming circuit and display device |
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Granted publication date: 20140319 |