CN202455617U - Light-emitting diode (LED) lighting time delay circuit and LED lighting device - Google Patents
Light-emitting diode (LED) lighting time delay circuit and LED lighting device Download PDFInfo
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- CN202455617U CN202455617U CN2012200295413U CN201220029541U CN202455617U CN 202455617 U CN202455617 U CN 202455617U CN 2012200295413 U CN2012200295413 U CN 2012200295413U CN 201220029541 U CN201220029541 U CN 201220029541U CN 202455617 U CN202455617 U CN 202455617U
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- triode
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- delay circuit
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Abstract
The utility model is suitable to the field of lighting, and provides a light-emitting diode (LED) lighting time delay circuit and an LED lighting device. In the embodiment of the utility model, a 12V power supply (VCC) input is utilized, a triode Ti and a triode T2 are connected when the circuit is power-on, a metal oxide semiconductor (MOS) tube QT1 is cutoff, a lighting LED lamp bank is not turned on, the T1 is delayed to be turned off through time constant (RC) charging, the delay time is up when the T1 and T2 are cutoff, the MOS tube QT1 is connected, and the lighting LED lamp bank is turned on, so the time delay opening effect is realized, and an LED is prevented from flashing display.
Description
Technical field
The utility model belongs to lighting field, relates in particular to a kind of delay circuit and LED lighting device of LED illumination.
Background technology
After RC time-delay is meant resistance and capacitances in series, the logical direct current of going up, the electric capacity voltage rose with the time of charging, and the time of charging follows the appearance value size of resistance and electric capacity of resistance relevant.The delay switch circuit utilization is extensive, and at the small power switch circuit with under to the not high situation of delay time required precision, the utilization of RC delay switch circuit is more general.Because the control switch of a lot of LED illumination occasions is mechanical switchs; Some still is a magnetic switch; And LED belongs to the electric current Sensitive Apparatus, as long as there are some weak currents just can light, the shake of machinery or magnetic switch can cause LED to show flicker; Give a kind of insecure illusion of user, so need a delay circuit to control the unlatching of LED.
Popular RC delay switch circuit mainly contains following two kinds at present: 1, directly adopt RC time-delay control transistor switching circuit.This circuit can only be used to drive low-power load, the operational environment that the delay time precision is lower.Such as, signal delay circuit.If at the operational environment of LED illumination control circuit; Then the contradiction of the cut-off current of triode and saturation conduction condition can influence the operate as normal of LED; The tube voltage drop of triode is big; Also can produce extra power consumption, even under the very low situation of operating current, its delay time adjustable extent still is on the low side.Like this, just make being chosen in of triode increase on the cost and the necessary working temperature of considering triode, can't be used to seal the encapsulating product.2, adopt special-purpose time-delay control chip.The time-delay of LED is controlled in use such as 555 bistable state delay chips.Make in this way, required assembly space is bigger, and cost is higher relatively.
The utility model content
In order to solve the above-mentioned technical problem that prior art exists, the purpose of the utility model embodiment is to provide a kind of delay circuit of LED illumination.
The utility model embodiment is achieved in that a kind of delay circuit of LED illumination, and said delay circuit comprises:
Pin 1 and the illumination LED lamp group of the resistance R 1 that links to each other with input power supply VCC, triode T1, connector CN1; The end of the other end difference connecting resistance R3 of said resistance R 1 and the base stage of triode T1; Two capacitor C 1, the C2 of another termination parallel connection of said resistance R 3; The other end of said capacitor C 1, C2 connects the pin 2 of connector CN1
The collector electrode of said triode T1 links to each other with the base stage of triode T2 through resistance R 4, and the emitter grounding of triode T2, collector electrode connect the grid of metal-oxide-semiconductor QT1, and the drain electrode of said metal-oxide-semiconductor QT1 connects said illumination LED lamp group, the source ground of metal-oxide-semiconductor QT1.
Further, said delay circuit also comprises resistance R 2, and the one of which end links to each other with input power supply VCC, and the other end links to each other with the collector electrode of triode T2.
Further, said input power supply VCC is 12V.
Further, said delay circuit also comprises diode ZD1, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
Further, said circuit also comprises capacitor C 3, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
Another purpose of the utility model embodiment is to provide a kind of LED lighting device, and said LED lighting device adopts above-mentioned any described delay circuit.
In the embodiment of the utility model, utilize the VCC input of 12V, triode T1, triode T2 conducting when powering on; Metal-oxide-semiconductor QT1 turn-offs, and illumination LED lamp group does not work, and through the RC charging T1 time-delay is closed; Delay time arrives, and T1, T2 turn-off metal-oxide-semiconductor QT1 conducting; Illumination LED lamp group is lighted, and reaches the effect that time-delay is opened, and avoids the LED flicker to show.
Description of drawings
Fig. 1 is the circuit diagram of the delay circuit of the LED illumination that provides of the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The circuit structure of the delay circuit that the LED that Fig. 1 shows the utility model embodiment to be provided throws light on, this delay circuit can be used as the part in the LED lighting device.
This delay circuit comprises: pin 1 and the illumination LED lamp group of the resistance R 1 that links to each other with input power supply VCC, triode T1, connector CN1; The end of the other end difference connecting resistance R3 of said resistance R 1 and the base stage of triode T1; Two capacitor C 1, the C2 of another termination parallel connection of said resistance R 3, the other end of said capacitor C 1, C2 connects the pin 2 of connector CN1.The collector electrode of said triode T1 links to each other with the base stage of triode T2 through resistance R 4, and the emitter grounding of triode T2, collector electrode connect the grid of metal-oxide-semiconductor QT1, and the drain electrode of said metal-oxide-semiconductor QT1 connects said illumination LED lamp group, the source ground of metal-oxide-semiconductor QT1.
As the embodiment of the utility model, said delay circuit also comprises resistance R 2, and the one of which end links to each other with input power supply VCC, and the other end links to each other with the collector electrode of triode T2.
As the embodiment of the utility model, said delay circuit also comprises diode ZD1, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
As the embodiment of the utility model, said circuit also comprises capacitor C 3, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
In the embodiment of the utility model, power supply VCC voltage is 12 VDC, and when external switch was connected, VCC had the 12V power supply; Give C1, C2 charging through R1, R3, triode T1 has enough base currents to pass through and participates in C1, C2 charging, the emitter of triode T1, collector electrode conducting; Electric current passes through R4 and T1 base stage, at this moment, and the T2 conducting; The grid level that causes metal-oxide-semiconductor QT1 is low, and QT1 breaks off, and this illumination LED lamp group does not work.
In the process of charging along with capacitor C 1, C2, as C1, when the C2 charging reaches certain voltage value, the pressure drop that the electric current through R1 produces does not reach the threshold voltage (about 0.7) of T1 base stage; At this moment, triode T1 begins to turn-off, and R4 and T2 base stage do not have electric current to pass through; T2 also turn-offs; The grid level of metal-oxide-semiconductor QT1 is high, the QT1 conducting, and this illumination LED lamp group is lighted.
The appearance value of resistance through regulating R1, R3 and C1, C2 can change delay time, reaches required delay time.
C1, C2 initial charge were zero when VCC had just powered on, and can both guarantee triode T1 conducting in charging process, thereby forbid that LED lights, and the LED lamp is frequently lighted and the demonstration of glimmering when externally switch does not also have steady closure like this.After the external switch steady closure, VCC is stabilized in 12V, and after C1, C2 charging were accomplished, circuit can guarantee that T1 turn-offs, and metal-oxide-semiconductor QT1 conducting makes illumination LED lamp group normally light illumination.Consider that simultaneously if T1, T2 front time-delay control section circuit malfunction, back metal-oxide-semiconductor QT1 also can normally open and make illumination LED lamp group operate as normal, and illumination LED lamp group was lost efficacy, thereby has increased the reliability of circuit.
In sum, the utility model adopts the RC time-delay to close the method for PNP triode, solves in the little problem of RC delay circuit controlled range.
At first, be designed to delayed start-up NPN triode at general RC delay circuit, its unlatching threshold values of such circuit is about 0.7V, and it is suitable when selecting R resistance and C appearance value, just to be difficult to select.If change the purpose that time-delay closing PNP triode reaches time-delay into, its RC range of choice is just than broad so, and like the 12V input, its charges is about 12V-0.7V=11.3V.
Secondly, often use triode to control at general LED illumination control circuit, but the saturation conduction pressure drop of triode is about 0.3V; And select for use the conduction voltage drop of metal-oxide-semiconductor to ignore; Because the conducting resistance of metal-oxide-semiconductor has only tens milliohms, so, select for use metal-oxide-semiconductor to control the LED lighting circuit; Can reduce power loss, be convenient to miniaturization Design and seal encapsulating design etc.
At last, consider that delay control circuit is the auxiliary functional circuit of LED illumination, so will consider the influence of its inefficacy back to the LED lighting circuit, if auxiliary circuit had lost efficacy, the control of can not delaying time can not have influence on the function of LED illumination.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (6)
1. the delay circuit of LED illumination is characterized in that said delay circuit comprises:
Pin 1 and the illumination LED lamp group of the resistance R 1 that links to each other with input power supply VCC, triode T1, connector CN1; The end of the other end difference connecting resistance R3 of said resistance R 1 and the base stage of triode T1; Two capacitor C 1, the C2 of another termination parallel connection of said resistance R 3; The other end of said capacitor C 1, C2 connects the pin 2 of connector CN1
The collector electrode of said triode T1 links to each other with the base stage of triode T2 through resistance R 4, and the emitter grounding of triode T2, collector electrode connect the grid of metal-oxide-semiconductor QT1, and the drain electrode of said metal-oxide-semiconductor QT1 connects said illumination LED lamp group, the source ground of metal-oxide-semiconductor QT1.
2. the delay circuit of LED illumination according to claim 1 is characterized in that said delay circuit also comprises resistance R 2, and the one of which end links to each other with input power supply VCC, and the other end links to each other with the collector electrode of triode T2.
3. the delay circuit of LED illumination according to claim 1 and 2 is characterized in that said input power supply VCC is 12V.
4. the delay circuit of LED illumination according to claim 1 is characterized in that said delay circuit also comprises diode ZD1, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
5. the delay circuit of LED illumination according to claim 1 is characterized in that said circuit also comprises capacitor C 3, and the one of which end links to each other with the collector electrode of triode T2, other end ground connection.
6. a LED lighting device is characterized in that, said LED lighting device adopts any described delay circuit in the claim 1,2,4,5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200295413U CN202455617U (en) | 2012-01-30 | 2012-01-30 | Light-emitting diode (LED) lighting time delay circuit and LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200295413U CN202455617U (en) | 2012-01-30 | 2012-01-30 | Light-emitting diode (LED) lighting time delay circuit and LED lighting device |
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| Publication Number | Publication Date |
|---|---|
| CN202455617U true CN202455617U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200295413U Expired - Lifetime CN202455617U (en) | 2012-01-30 | 2012-01-30 | Light-emitting diode (LED) lighting time delay circuit and LED lighting device |
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| CN (1) | CN202455617U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095267A (en) * | 2012-12-28 | 2013-05-08 | 上海华兴数字科技有限公司 | Power supply delay device for engineering machinery |
| CN104105264A (en) * | 2014-07-22 | 2014-10-15 | 常州顶芯半导体技术有限公司 | Active temperature control high-power LED drive circuit and working method thereof |
| CN107949113A (en) * | 2017-12-06 | 2018-04-20 | 北京小米移动软件有限公司 | LED light control circuit and LED light |
| CN109121246A (en) * | 2018-07-24 | 2019-01-01 | 郑州云海信息技术有限公司 | The control circuit and server of light-emitting diode on a kind of server |
-
2012
- 2012-01-30 CN CN2012200295413U patent/CN202455617U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095267A (en) * | 2012-12-28 | 2013-05-08 | 上海华兴数字科技有限公司 | Power supply delay device for engineering machinery |
| CN103095267B (en) * | 2012-12-28 | 2016-10-12 | 上海华兴数字科技有限公司 | A kind of power supply time-delay mechanism of engineering machinery |
| CN104105264A (en) * | 2014-07-22 | 2014-10-15 | 常州顶芯半导体技术有限公司 | Active temperature control high-power LED drive circuit and working method thereof |
| CN107949113A (en) * | 2017-12-06 | 2018-04-20 | 北京小米移动软件有限公司 | LED light control circuit and LED light |
| CN109121246A (en) * | 2018-07-24 | 2019-01-01 | 郑州云海信息技术有限公司 | The control circuit and server of light-emitting diode on a kind of server |
| CN109121246B (en) * | 2018-07-24 | 2021-02-19 | 苏州浪潮智能科技有限公司 | Control circuit of LED on server and server |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xili street Shahe road 518000 Shenzhen City, Guangdong province No. 3151 emerging industrial park building A 404-1 Patentee after: SHENZHEN ZHENBANG TECHNOLOGY CO.,LTD. Address before: 518000, Guangdong, Nanshan District, Taoyuan street, Longjing second industrial zone, A building, 2 floor, building A, building 3, north, B, building 6, building C, building 3, Shenzhen Patentee before: SHENZHEN ZHENBANG INTELLIGENT TECHNOLOGY Co.,Ltd. Address after: 518000, Guangdong, Nanshan District, Taoyuan street, Longjing second industrial zone, A building, 2 floor, building A, building 3, north, B, building 6, building C, building 3, Shenzhen Patentee after: SHENZHEN ZHENBANG INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Xili Longjing second industrial zone A building 3 floor B building 3 floor Patentee before: SHENZHEN ZHENBANG INDUSTRY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |