CN209283551U

CN209283551U - A kind of driving circuit of light-operated LED (liquid crystal diode) lamp

Info

Publication number: CN209283551U
Application number: CN201821338647.5U
Authority: CN
Inventors: 肖亮; 张才富; 范蛟
Original assignee: Dongguan Becky Electronic Technology Co Ltd
Current assignee: Dongguan Becky Electronic Technology Co Ltd
Priority date: 2018-08-17
Filing date: 2018-08-17
Publication date: 2019-08-20
Anticipated expiration: 2028-08-17

Abstract

The utility model relates to a kind of driving circuits of light-operated LED (liquid crystal diode) lamp, including switching Power Supply power supply module and light-operated control module, the switching Power Supply power supply module includes power-switching circuit and LED drive circuit, the LED drive circuit is powered for controlling whether to a LED lamp, and the LED drive circuit includes LED drive chip；The light-operated control module is for controlling whether the LED drive circuit gives LED lamp power supply, and the light-operated control module includes bleeder circuit, switching circuit and light-sensitive element connecting pin, and the switching circuit includes the first transistor and second transistor.The driving circuit is powered using the LED drive chip in two transistor controls LED drive circuits to LED lamp by the switching circuit of light-operated control module, the driving circuit control mode is simple, configuration is simple, manufacturing cost is low, operation stability is high, meets the needs of light-operated switch power supply producer of production now.

Description

A kind of driving circuit of light-operated LED (liquid crystal diode) lamp

Technical field

The utility model relates to field of LED drive technologies, and in particular, to a kind of driving circuit of light-operated LED lamp.

Background technique

LED illumination is a kind of new type light source of rapid rising development in recent years, its many good features make answering for it More and more wider with face, LED (LightingEmittingDiode) illumination is LED lighting, is that a kind of semiconductor is solid Body luminescent device.

In daily life, headlamp is typically all and closes daytime, and night opens, for the ease of the convenience of life, so There is the illumination light-controlled lamp opened or closed with external environment light intensity difference.

In the prior art, headlamp realized by light-operated LED close with open be it is common, it is most of light-operated in the market Switching circuit is the most commonly used is the driving power of LED illumination lamp is typically independent, in use, is in addition reconfigured human body sense It answers, light-operated circuit, manufactures and designs to itself bring some inconvenience in this way, also because volume gives greatly next production using power supply Product design is made troubles.Especially in the small-sized power supply powered to low-power LED illuminating lamp in use, without human body sensing and light Circuit is controlled, the use of LED illumination lamp is greatly limited.

China Intellectual Property Office discloses a kind of utility model patent of light-operated switch power supply on May 27th, 2015, should The notification number of patent is CN204362394U, and which disclose a kind of light-operated switch power supply, including a light-operated circuit unit are logical The first signal wire and second signal line are crossed, light-sensitive element PT1 is introduced into light-operated box；The power ground of the light-operated circuit unit with It is connected with the ground wire of Switching Power Supply main circuit；The light-operated circuit unit is by voltage-stabiliser tube ZD1 pressure stabilizing supply the first transistor Q1, the Two-transistor Q2 and light-sensitive element PT1 operating voltage；The base stage of third transistor Q3 is connected to the collector of the first transistor Q1, The positive pole pin of the collector connection integrated drive chips U1 of third transistor Q3.Although the technical side of the patent disclosure Case solves technical problem set forth above, but whether gives LED lamp using three transistor controls Switching Power Supply main circuits Power supply process control mode is more complicated, and configuration trouble, production cost is high, as market competition becomes increasingly fierce, light-operated The market price of LED light lamps and lanterns gradually decreases, and high-cost light-operated switch power supply is not able to satisfy production light-operated switch power supply producer Demand.

Therefore, a kind of driving circuit of light-operated LED (liquid crystal diode) lamp need to be provided, so as to solve the deficiencies in the prior art.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a kind of will be driven using two transistor controls LED The driving circuit for the light-operated LED (liquid crystal diode) lamp that LED drive chip U1 in dynamic circuit powers to LED lamp, the driving circuit controlling party Formula is simple, and configuration is simple, and manufacturing cost is low, and operation stability is high.

The technical solution of the utility model is as follows:

A kind of driving circuit of light-operated LED (liquid crystal diode) lamp, including switching Power Supply power supply module and with the switching Power Supply power supply module Light-operated control module,

The switching Power Supply power supply module includes power-switching circuit and LED drive circuit, the power-switching circuit Input terminal is electrically connected with a mains, the output end of the power-switching circuit respectively with the LED drive circuit and described Light-operated control module connection；

The LED drive circuit is powered for controlling whether to a LED lamp, and the LED driving circuit includes that LED drives Dynamic chip U1；

The light-operated control module is for controlling whether the LED drive circuit gives LED lamps and lanterns power supply, the light Control control module is also used to connect with a light-sensitive element, and the light-operated control module includes bleeder circuit, switching circuit and photosensitive Component connection, the bleeder circuit are connect with the output end of the power-switching circuit, and the bleeder circuit is also opened with described Circuit connection is closed, the switching circuit is connect with the light-sensitive element connecting pin, and the switching circuit also drives core with the LED The energization pins end of piece U1 connects；

The switching circuit includes the first transistor Q1 and second transistor Q2.

Preferably, the power-switching circuit is used to change into mains AC to match with the LED driving circuit Input voltage.Wherein, the input terminal of the power-switching circuit is electrically connected with the mains, and parallel connection has pressure-sensitive later Resistance MOV1 and low-pass first order filter.

Further, the low-pass first order filter is that resistance set and capacitor XC1, the resistance collection are combined into first resistor The series connection of RX1 and second resistance RX2, filtered signal pass through inductance L1 and bidirectional trigger diode DB1, after the conversion of output DC voltage provide input voltage to LED drive circuit and the light-operated control module after inductance L2.

Preferably, the LED drive circuit further includes transformer T1 and LED lamp connecting pin, the LED drive chip U1 Pin connect with the voltage that the power-switching circuit exports, the pin of the LED drive chip U1 also with the transformer The primary connection of T1 connects, and the secondary connection of the transformer T1 is connect with the LED lamp connecting pin, the LED light Tool connecting pin with the LED lamp for connecting.

Preferably, the bleeder circuit divides the power-switching circuit to the switching circuit supply voltage； The bleeder circuit includes the 14th resistance R14 and the 15th resistance R15 with the 14th resistance R14 series connection, institute The one end for stating the 14th resistance R14 is connect with the output end of the power-switching circuit, the 14th resistance R14 of the other end Also connect with the anode of the light-sensitive element connecting pin, the anode of the light-sensitive element connecting pin, cathode both ends respectively with it is described The both ends pin of 15th resistance R15 connects, wherein the 15th resistance R15 ground connection of one end.

Further, the resistance value ratio R14/R15 of the 14th resistance R14 and the 15th resistance R15 is 2~4.4.

Preferably, the base stage of the first transistor Q1 is connect with the light-sensitive element connecting pin, the first transistor The collector of Q1 is connect with the base stage of the second transistor Q2, and the collector and the LED of the second transistor Q2 drives The energization pins of chip U1 connect, and the emitter of the first transistor Q1 and the second transistor Q2 are grounded.

Further, one is in series between the base stage of the first transistor Q1 and the collector of the second transistor Q2 Thirteenth resistor R13 and the 4th diode D4.

Preferably, the light-sensitive element connecting pin is connect with the light-sensitive element.

The utility model has the following beneficial effects: compared with prior art, the driving circuit of the light-operated LED (liquid crystal diode) lamp passes through light-operated control The switching circuit of molding block is powered using the LED drive chip U1 in two transistor controls LED drive circuits to LED lamp, The driving circuit control mode is simple, and configuration is simple, and manufacturing cost is low, and operation stability is high, and satisfaction produces light-operated now The demand of Switching Power Supply producer.

Detailed description of the invention:

Fig. 1 is the circuit diagram of the driving circuit of light-operated LED (liquid crystal diode) lamp described in the utility model.

Specific embodiment

In order to make the goal of the invention of the utility model, technical solution and technical effect are more clearly understood, below with reference to tool Body embodiment is described further the utility model.It should be understood that specific embodiment described herein, be only used for explaining The utility model is not used to limit the utility model.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein packet Include any and all combinations of one or more related listed items.

Referring to Fig.1, the driving circuit of the light-operated LED (liquid crystal diode) lamp of the utility model, including switching Power Supply power supply module 100 and with institute State the light-operated control module 200 of switching Power Supply power supply module 100.

Referring to Fig.1, the switching Power Supply power supply module 100 includes power-switching circuit and LED driving circuit, the electricity The input terminal of power-switching circuit is electrically connected with a mains, and the output end of the power-switching circuit drives with the LED respectively Dynamic circuit and the light-operated control module 200 connection.In the present embodiment, the mains AC is 100V~264V exchange Voltage.

Referring to Fig.1, the power-switching circuit matches for changing into mains AC with the LED driving circuit Input voltage.In the present embodiment, the input terminal of the power-switching circuit is electrically connected with mains, is connected in parallel later There are varistor MOV1 and low-pass first order filter, the low-pass first order filter is resistance set and capacitor XC1, the resistance Collection is combined into the series connection of first resistor RX1 and second resistance RX2, filtered signal by inductance L1 and bidirectional trigger diode DB1, the DC voltage after the conversion of output provide after inductance L2 to LED drive circuit and the light-operated control module 200 Input voltage.

Referring to Fig.1, the LED drive circuit is powered for controlling whether to a LED lamp, the LED drive circuit packet LED drive chip U1, transformer T1 and LED lamp connecting pin are included, the pin 3 and the power supply of the LED drive chip U1 turns The voltage connection of circuit output is changed, the pin of the LED drive chip U1 is connect with the primary connection of the transformer T1, institute The secondary connection for stating transformer T1 is connect with the LED lamp connecting pin, and the LED lamp connecting pin is used for and the LED Lamps and lanterns connection.In the present embodiment, the LED drive chip U1 can select the LED drive chip of SD6804 and compatible model, Because available model is too much herein without enumerating.

Referring to Fig.1, the light-operated control module 200 is for controlling whether the LED drive circuit gives LED lamp confession Electricity, the light-operated control module 200 are also used to connect with a light-sensitive element, the light-operated control module 200 include bleeder circuit, Switching circuit and light-sensitive element connecting pin, the bleeder circuit are connect with the output end of the power-switching circuit, the partial pressure Circuit is also connect with the switching circuit, and the switching circuit is connect with the light-sensitive element connecting pin, and the switching circuit is also The resistance R10 that connects is connect with the energization pins end of the LED drive chip U1.

Referring to Fig.1, the bleeder circuit divides the power-switching circuit to the switching circuit supply voltage； The bleeder circuit includes the 14th resistance R14 and the 15th resistance R15 with the 14th resistance R14 series connection, institute The one end for stating the 14th resistance R14 is connect with the output end of the power-switching circuit, the 14th resistance R14 of the other end Also connect with the anode of the light-sensitive element connecting pin, the anode of the light-sensitive element connecting pin, cathode both ends respectively with it is described The both ends pin of 15th resistance R15 connects, wherein the 15th resistance R15 ground connection of one end.Wherein, for the ease of to institute It stating switching circuit and voltage is provided, the resistance value ratio R14/R15 of the 14th resistance R14 and the 15th resistance R15 is 2~ 4.4.In the present embodiment, the resistance value of the 14th resistance R14 is 330K, and the resistance value of the 15th resistance R15 is 75K.

Referring to Fig.1, the switching circuit includes the first transistor Q1 and second transistor Q2, the first transistor Q1's Base stage is connect with the light-sensitive element connecting pin, the base stage of the collector of the first transistor Q1 and the second transistor Q2 The one resistance R10 of collector series connection of connection, the second transistor Q2 is connect with the energization pins of the LED drive chip U1, The emitter of the first transistor Q1 and the second transistor Q2 are grounded.Wherein, the LED lamp occurs in order to prevent Flashing light phenomenon is in series with 1 the 13rd between the base stage of the first transistor Q1 and the collector of the second transistor Q2 Resistance R13 and the 4th diode D4.In the present embodiment, the first transistor Q1 and the second transistor Q2 are preferably selected With the triode of 2CS2712.

Referring to Fig.1, the light-sensitive element connecting pin is connect with a light-sensitive element.In the present embodiment, the light-sensitive element Preferably photosensitive sensor.

Referring to Fig.1, the working principle of the driving circuit of the light-operated LED (liquid crystal diode) lamp is:

When the light-sensitive element is in the case where intensity of illumination is weak, the resistance value in the light-sensitive element becomes larger, described photosensitive Element converts the power supply together with the 15th resistance R15 with the 14th resistance R14 in the bleeder circuit Circuit output voltage is divided, and in switching circuit described in the voltage input after partial pressure, voltage value is more than 0.7V, has reached institute State the conducting voltage of the first transistor Q1, therefore the first transistor Q1 is connected, then the electricity of the first transistor Q1 collector Pressure is 0V, then the voltage of the second transistor Q2 base stage is 0V, the second transistor Q2 cut-off drives to the LED LED driving chip U1 power supply in circuit is normal, so that the LED lamp connecting pin has voltage output to allow the LED lamp work Make；

When the light-sensitive element is in the case where intensity of illumination is strong, the resistance value in the light-sensitive element becomes smaller, described photosensitive Element converts the power supply together with the 15th resistance R15 with the 14th resistance R14 in the bleeder circuit Circuit output voltage is divided, and in switching circuit described in the voltage input after partial pressure, voltage value is lower than 0.7V, and institute is not achieved The conducting voltage of the first transistor Q1 is stated, therefore the first transistor Q1 ends, the second transistor Q2 conducting, described second After transistor Q2 conducting, so that be lower to the supply voltage of the LED drive chip U1 in the LED drive circuit, it cannot be normal LED drive chip U1 movement is driven, the LED lamp connecting pin is caused not have voltage output that can not drive the LED lamp work Make.

The driving circuit of the light-operated LED (liquid crystal diode) lamp of the utility model uses two crystal by the switching circuit of light-operated control module The LED drive chip U1 managed in LED drive circuit processed powers to LED lamp, and the driving circuit control mode is simple, route Layout is simple, and manufacturing cost is low, and operation stability is high, meets the needs of light-operated switch power supply producer of production now.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, architectural form cans be flexible and changeable, and can be produced with subseries Product.Several simple deduction or replace are only made, it is true by the claims submitted all to shall be regarded as belonging to the utility model Fixed scope of patent protection.

Claims

1. a kind of driving circuit of light-operated LED (liquid crystal diode) lamp, including switching Power Supply power supply module and with the switching Power Supply power supply module Light-operated control module,

Institute's switching Power Supply power supply module includes power-switching circuit and LED drive circuit, the power-switching circuit it is defeated Enter end be electrically connected with a mains, the output end of the power-switching circuit respectively with the LED drive circuit and the light Control control module connection；

The LED drive circuit is powered for controlling whether to a LED lamp, and the LED drive circuit includes LED drive chip (U1), which is characterized in that

The light-operated control module is for controlling whether the LED drive circuit gives LED lamp power supply, the light-operated control Module is also used to connect with a light-sensitive element, and the light-operated control module includes that bleeder circuit, switching circuit and light-sensitive element connect Connect end, the bleeder circuit is connect with the output end of the power-switching circuit, the bleeder circuit also with the switching circuit Connection, the switching circuit are connect with the light-sensitive element connecting pin, and the switching circuit is also with the LED drive chip U1's The connection of energization pins end；

The switching circuit includes the first transistor (Q1) and second transistor (Q2).

2. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1, which is characterized in that the first transistor (Q1) Base stage is connect with the light-sensitive element connecting pin, collector and the second transistor (Q2) of the first transistor (Q1) Base stage connection, the collector of the second transistor (Q2) connect with the energization pins of the LED drive chip (U1), and described the The emitter of one transistor (Q1) and the second transistor (Q2) is grounded.

3. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1 or 2, which is characterized in that the first transistor (Q1) Base stage and the second transistor (Q2) collector between be in series with a thirteenth resistor (R13) and the 4th diode (D4)。

4. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1, which is characterized in that the bleeder circuit includes the tenth Four resistance (R14) and the 15th resistance (R15) being connected in series with the 14th resistance (R14), the 14th resistance (R14) one end is connect with the output end of the power-switching circuit, the 14th resistance (R14) of the other end also with it is described The anode connection of light-sensitive element connecting pin, the anode of the light-sensitive element connecting pin, cathode both ends are electric with the described 15th respectively The both ends pin connection of (R15) is hindered, wherein the 15th resistance (R15) ground connection of one end.

5. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 4, which is characterized in that the 14th resistance (R14) with The resistance value ratio R14/R15 of 15th resistance (R15) is 2~4.4.

6. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1, which is characterized in that the LED drive circuit further includes Transformer (T1) and LED lamp connecting pin, the electricity of the pin of the LED drive chip (U1) and power-switching circuit output Pressure connection, the pin of the LED drive chip (U1) are also connect with the primary connection of the transformer (T1), the transformer (T1) secondary connection is connect with the LED lamp connecting pin, and the LED lamp connecting pin is used to connect with the LED lamp It connects.

7. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1, which is characterized in that the power-switching circuit is used for Mains AC changes into the input voltage to match with the LED drive circuit, the input terminal of the power-switching circuit with The mains electrical connection, parallel connection has varistor (MOV1) and low-pass first order filter later.

8. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 7, which is characterized in that the low-pass first order filter is Resistance set and capacitor (XC1), the resistance collection is combined into first resistor (RX1) and second resistance (RX2) is composed in series.

9. the driving circuit of light-operated LED (liquid crystal diode) lamp according to claim 1, which is characterized in that the light-sensitive element connecting pin with The light-sensitive element connection.