CN212463588U

CN212463588U - Control circuit structure capable of adjusting LED color temperature

Info

Publication number: CN212463588U
Application number: CN202021043813.6U
Authority: CN
Inventors: 熊先文; 亚当·钱柏格
Original assignee: Hangzhou Lijiacheng Electric Co Ltd
Current assignee: Hangzhou Lijiacheng Electric Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-02
Anticipated expiration: 2030-06-09

Abstract

The utility model relates to a control circuit structure of adjustable LED colour temperature, including circuit substrate and the control circuit of the adjustable LED colour temperature of setting on circuit substrate, circuit substrate is equipped with and introduces the power and gives the binding post of the control circuit of adjustable LED colour temperature, binding post includes the contact tube, be equipped with the insulating layer on the outer peripheral face of contact tube, be equipped with the screw thread through-hole on the lateral wall of contact tube, be equipped with in the screw thread through-hole and insert the terminal bolt of fixing in the contact tube is pressed to the heart yearn of the power cord in the contact tube, terminal bolt is insulation construction. The utility model aims at providing a control circuit structure of adjustable LED colour temperature that can be applicable to narrow and small space and use has solved the control circuit structure of current adjustable LED colour temperature and has been used for narrow and small space to produce the problem of electric leakage phenomenon easily when carrying out the strip look.

Description

Control circuit structure capable of adjusting LED color temperature

Technical Field

The utility model relates to the field of lighting technology, especially, relate to a control circuit structure of adjustable LED colour temperature.

Background

Because the LED lighting has the advantages of energy saving, long life, no pollution, etc., the LED lighting is gradually replacing the conventional incandescent lamps and energy saving lamps. The Triac dimmers commonly found on the market today are used with conventional incandescent lamps. The Triac dimmer is a Triac dimmer for short, and the principle of the Triac dimmer is that the conduction angle of a thyristor is controlled by adjusting an internal delay circuit of the Triac dimmer. The larger the conduction angle, the longer the conduction time, and the more energy that will provide a higher brightness output for the incandescent lamp. The light emitting principle of the incandescent lamp is that a tungsten filament generates heat radiation by current to emit visible light. It behaves as a purely resistive load. Thus, Triac dimmers are well suited for incandescent lamps, where the user can adjust the brightness output as desired. Due to the nature of heat radiation, the color temperature of an incandescent lamp will decrease from 2700 kelvin to about 2000 kelvin as the incandescent lamp brightness output decreases gradually, which is close to the color temperature at sunset.

With technological advances, LED lamps are now compatible with conventional Triac dimmers and achieve smooth, linear dimming of brightness similar to incandescent lamps. But due to the light emitting characteristics of the LEDs, the color temperature of the LED lamp does not change with the driver current. To achieve a color temperature variation similar to an incandescent lamp, two or more different color temperature LED chips are typically used, such as 3000 kelvin and 2000 kelvin. With driver current sharing, the LEDs can be coordinated with a Triac dimmer to adjust both the brightness output and the color temperature change synchronously. The correlated color temperature of the LED light source is scaled by (CCT). The CCT is higher, the light is brighter and is close to the color temperature at noon sunshine; the lower the CCT, the closer the light is to the color temperature at sunrise and sunset. Scientific studies have shown that bright light can irritate the human senses and can damage human health, especially when exposed to bright light at night, can cause jet lag, poor sleep, and it can also lead to other adverse conditions such as hormone dyssecretosis. For this purpose, the applicant designed a control circuit with patent number 201821223109.1 for adjusting the color temperature of an LED for color adjustment of the LED, and a circuit diagram of the control circuit for adjusting the color temperature of the LED is shown in fig. 1. When the circuit is mounted in an LED lamp by being wired on a circuit board, the space between the terminal and peripheral components is not sufficient due to the limitation of the space, and a leakage phenomenon is likely to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control circuit structure of adjustable LED colour temperature that can be applicable to narrow and small space and use has solved the control circuit structure of current adjustable LED colour temperature and has been used for narrow and small space to produce the problem of electric leakage phenomenon easily when carrying out the strip look.

The technical problem is solved by the following technical scheme: the utility model provides a control circuit structure of adjustable LED colour temperature, includes circuit substrate and the control circuit of the adjustable LED colour temperature of setting on circuit substrate, circuit substrate is equipped with the introduction power and gives the binding post of the control circuit of adjustable LED colour temperature, a serial communication port, binding post includes the contact tube, be equipped with the insulating layer on the outer peripheral face of contact tube, be equipped with the screw thread through-hole on the lateral wall of contact tube, be equipped with in the screw thread through-hole and insert the terminal bolt of fixing in the contact tube is pressed to the heart yearn of power cord in the contact tube, the terminal bolt is insulation structure. This technical scheme sets up the insulating layer through the conducting tube with binding post outward to insulate and prevent to produce the electric leakage phenomenon near with peripheral part. When the control circuit structure capable of adjusting the color temperature of the LED is used in a narrow space, the phenomenon of electric leakage at the wiring position is not easy to generate.

Preferably, an insulating sleeve is connected to one end of the conductive tube, which is connected with the power line, in a threaded manner. When the power line is inserted into the conductive tube after the insulation skin is stripped, the phenomenon that the core wire is exposed outside the conductive tube can be frequently generated due to the error of stripping length control, and the exposed core wire can also cause the generation of the electric leakage phenomenon. This technical scheme rotates insulating cover after the wiring is good and makes insulating cover establish to the core line on to can avoid the production of electric leakage phenomenon.

Preferably, one end of the insulating sleeve, which is far away from the conductive tube, is provided with an insulating ring with an elastic structure, and the insulating ring is made of insulating rubber. The reliability at the time of insulation can be further improved.

Preferably, when the power line is connected with the conductive tube, the insulating ring is sleeved on the insulating sheath of the power line.

Preferably, the inner diameter of the insulating ring is smaller than the outer diameter of the power line. Can also play a dust role.

Preferably, the control circuit capable of adjusting the color temperature of the LED comprises a rectifying circuit, a filtering circuit, a voltage dividing circuit, a light coupling circuit, a constant current control circuit, a power supply circuit for supplying power to the constant current control circuit, an output filtering circuit, a voltage stabilizing diode, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a ninth capacitor and a triode, wherein the output end of the rectifying circuit is connected with the input end of the filtering circuit, the output end of the filtering circuit is divided into two paths, one path is connected with the input end of the voltage dividing circuit, and the other path is connected with the input end of the constant current control circuit; the output end of the voltage division circuit is connected with the anode of the voltage stabilizing diode, the cathode of the voltage stabilizing diode is connected with the input end of the opto-coupling circuit, and the input end of the opto-coupling circuit is connected with the eighteenth resistor and the ninth capacitor; the twentieth resistor is connected between the two output ends of the optical coupling circuit, the output end of the optical coupling circuit is also connected with the nineteenth resistor and the base electrode of the triode, and the emitting electrode of the triode is connected with the negative output end of the optical coupling circuit; the output end of the constant current control circuit is connected with the input end of the output filter circuit, a first LED lamp bead is connected between the two output ends of the output filter circuit, and a second LED lamp bead is connected between the output end of the output filter circuit and the collector electrode of the triode.

Preferably, the filter circuit includes a fourth capacitor, an inductor, a fifteenth resistor, a fifth capacitor, a first resistor, a second resistor, and a sixth capacitor, one end of the fourth capacitor is connected in parallel to one end of the inductor and one end of the fifteenth resistor, the other end of the fourth capacitor is connected in parallel to one end of the first resistor, one end of the second resistor, and one end of the sixth capacitor, the other end of the first resistor and the other end of the second resistor are simultaneously connected to one end of the fifth capacitor, and the other end of the fifteenth resistor, the other end of the inductor, the other end of the fifth capacitor, and the other end of the sixth capacitor are connected in parallel to the output end of the filter circuit.

Preferably, the constant current control circuit comprises a constant current control chip, a first pin of the constant current control chip is connected with the power supply circuit, one end of a twelfth resistor and one end of a third capacitor, and the other end of the twelfth resistor is connected with the output filter circuit; a second pin of the constant current control chip is connected with one end of a seventh resistor; a third pin of the constant current control chip is respectively connected with an anode of a first diode and one end of a second capacitor, a cathode of the first diode is respectively connected with one end of a fifth resistor, one end of a sixth resistor and one end of the first capacitor, and the other end of the fifth resistor is connected with the input end of the constant current control circuit; a fourth pin of the constant current control chip is grounded; a fifth pin of the constant current control chip is connected with one end of a ninth resistor and one end of an eleventh resistor respectively; a sixth pin of the constant current control chip is connected with one end of a third resistor and one end of a fourth resistor in parallel, and the other ends of the third resistor and the fourth resistor are grounded simultaneously; the other end of the sixth resistor, the other end of the first capacitor, the other end of the third capacitor, the other end of the seventh resistor and the other end of the second capacitor are all grounded.

Preferably, the power supply circuit includes a third diode, a fourteenth resistor, a thirteenth resistor, a fourth diode, and a second polarity capacitor, anodes of the third diode, the fourteenth resistor, the thirteenth resistor, and the fourth diode are sequentially connected, a cathode of the fourth diode is connected to the first pin of the constant current control chip, an anode of the second polarity capacitor is connected between the fourteenth resistor and the thirteenth resistor, and a cathode of the second polarity capacitor is grounded.

Preferably, the output filter circuit includes a second diode, a tenth resistor, and a first polarity capacitor, a cathode of the second diode is connected to one end of the tenth resistor and an anode of the first polarity capacitor, respectively, and another end of the tenth resistor and a cathode of the first polarity capacitor are connected in parallel to a cathode end of the first LED lamp bead. .

The utility model discloses possess following beneficial effect: the wiring terminal is designed to insulate the surrounding parts, so that the leakage phenomenon cannot occur when the surrounding parts are arranged in close proximity to each other and are in contact with each other; the control circuit capable of adjusting the color temperature of the LED is easy to realize, the LED lamp is composed of a plurality of first LED lamp beads generating bright white light and a plurality of second LED lamp beads generating warm color light, the lamp comprises a control circuit used for receiving a dimming input voltage signal from a dimmer switch, and when the dimmer switch is adjusted within the range of the top of the dimmer switch, the color temperature of the lamp is changed to provide a warm and soft light environment, so that the brightness of the lamp can be kept unchanged.

Drawings

FIG. 1 is a circuit diagram of a control circuit for adjusting the color temperature of an LED;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a partially enlarged schematic view of fig. 2.

In the figure: the circuit board comprises a circuit board 1, a wiring terminal 2, a conductive tube 3, an insulating layer 4, a threaded through hole 5, a wiring bolt 6, an insulating sleeve 7, an insulating ring 8, a power line 9, a core wire 10 and an insulating sheath 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 2, a control circuit structure for adjusting the color temperature of an LED includes a circuit substrate 1 and a control circuit arranged on the circuit substrate for adjusting the color temperature of the LED. The circuit substrate is provided with a wiring terminal 2 for introducing a power supply to the control circuit capable of adjusting the color temperature of the LED.

Referring to fig. 1, the control circuit capable of adjusting the color temperature of the LED includes a rectifying circuit, a filter circuit, a voltage divider circuit, a coupling circuit, a constant current control circuit, a power supply circuit for supplying power to the constant current control circuit, an output filter circuit, a voltage regulator diode TL1, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a ninth capacitor CS3, and a transistor QS 1. The voltage input end of the rectifying circuit can be connected with a resistor FR1 and a resistor FR 2. The output end of the rectifying circuit is connected with the input end of the filter circuit, the output end of the filter circuit is divided into two paths, one path is connected with the input end of the voltage division circuit, the other path is connected with the input end of the constant current control circuit, the output end of the voltage division circuit is connected with the anode of a voltage stabilizing diode TL1, the cathode of the voltage stabilizing diode TL1 is connected with the input end of the optical coupling circuit, a seventh capacitor CS1 is connected in parallel to the voltage stabilizing diode TL1, the input end of the optical coupling circuit is also connected with one end of an eighteenth resistor R18 and one end of a ninth capacitor CS3, the other end of the eighteenth resistor R7 is connected with a power supply, the other end of the ninth capacitor CS3 is grounded, and the seventh capacitor CS 35563268 and the ninth capacitor; the twentieth resistor R20 is connected between the output ends of the opto-coupling circuit, the output end of the opto-coupling circuit is also connected with a nineteenth resistor R19 and the base electrode of a triode QS1, and the emitter of the triode QS1 is connected with the output end of the opto-coupling circuit. The nineteenth resistor R19 and the twentieth resistor R20 provide a base bias voltage to transistor QS 1. The output end of the constant current control circuit is connected with the input end of the output filter circuit, the output end of the output filter circuit is connected with a first LED lamp bead, the output end of the output filter circuit and the collector of the triode QS1 are directly connected with a second LED lamp bead, the first LED lamp bead is selected from a plurality of LED lamp beads generating bright white light, and the second LED lamp bead is selected from a plurality of second LED lamp beads generating warm colored light.

The filter circuit may include a fourth capacitor CA1, an inductor L1, a fifteenth resistor R15, a fifth capacitor CA2, a first resistor R1, a second resistor R2, and a sixth capacitor CA3, one end of the fourth capacitor CA1 is connected in parallel with one end of the inductor L1 and one end of the fifteenth resistor R15, the other end of the fourth capacitor CA1 is connected in parallel with one end of the first resistor R1, one end of the second resistor R2, and one end of the sixth capacitor CA3, the other end of the first resistor R1 and the other end of the second resistor R2 are simultaneously connected with one end of the fifth capacitor CA2, and the other end of the fifteenth resistor R15, the other end of the inductor L1, the other end of the fifth capacitor CA2 and the other end of the sixth capacitor CA3 are connected in parallel with the output terminal of the filter circuit.

The constant current control circuit can comprise a constant current control chip U1, a first pin 1 of the constant current control chip U1 is connected with the power supply circuit, one end of a twelfth resistor R12 and one end of a third capacitor C7, and the other end of the twelfth resistor R12 is connected with an output filter circuit; one end of a seventh resistor R7 is connected to a second pin 2 of the constant current control chip U1; the third pin 3 of the constant current control chip is respectively connected with the positive electrode of a first diode D1 and one end of a second capacitor C2, the negative electrode of the first diode D1 is respectively connected with one end of a fifth resistor R5, one end of a sixth resistor R6 and one end of a first capacitor C1, and the other end of the fifth resistor R5 is connected with the input end of the constant current control circuit; the fourth pin 4 of the constant current control chip U1 is grounded; the fifth pin 5 of the constant current control chip U1 is connected to one end of a ninth resistor R9 and one end of an eleventh resistor R11, respectively; a sixth pin of the constant current control chip U1 is connected in parallel with one end of a third resistor R3 and one end of a fourth resistor R4, and the other end of the third resistor R3 and the other end of the fourth resistor R4 are simultaneously grounded; the other end of the sixth resistor R6, the other end of the first capacitor C1, the other end of the third capacitor C7, the other end of the seventh resistor R7 and the other end of the second capacitor C2 are all grounded. The constant current control chip U1 may be any one commonly available in the market, and has no special requirement.

The power supply circuit can comprise a third diode T3, a fourteenth resistor R14, a thirteenth resistor R13, a fourth diode D5 and a second polarity capacitor C5, anodes of the third diode T3, the fourteenth resistor R14, the thirteenth resistor R13 and the fourth diode D5 are sequentially connected, a cathode of a fourth diode D5 is connected with the first pin 1 of the constant current control chip U1, an anode of a second polarity capacitor C5 is connected between the fourteenth resistor R14 and the thirteenth resistor R13, and a cathode of the second polarity capacitor C5 is grounded.

The output filter circuit can comprise a second diode D2, a tenth resistor R10 and a first polar capacitor C4, the cathode of the second diode D2 is respectively connected with one end of the tenth resistor R10 and the anode of the first polar capacitor C4, the other end of the tenth resistor R10 and the cathode of the first polar capacitor C4 are connected with the cathode end of the first LED lamp bead in parallel, and the output filter circuit is used for filtering high-frequency and low-frequency components of the switch.

The voltage dividing circuit formed by the sixteenth resistor R16, the seventeenth resistor R1 and the eighth capacitor CS2 is used for collecting signal changes of the front-stage dimmer, and when the voltage of the seventeenth resistor R17 is lower than the threshold voltage of the zener diode TL1, the front end of the optical coupler OP1 is turned off. The eighteenth resistor R18 limits the current passing through the front end of the optical coupler OP1, and the seventh capacitor CS1 and the ninth capacitor CS3 filter the high frequency of the power supply. After the front end of the optical coupling OP1 is closed, the triode QS1 is switched on, and the current flows to the second LED lamp bead through the triode QS1, namely the low color temperature LED, so that the change of the LED color temperature of the whole lamp is realized.

Referring to fig. 3, the terminal includes a conductive tube 3. The conductive tube is a blind tube with one end closed. The conductive tube is connected to the circuit board 1. An insulating layer 4 is provided on the outer peripheral surface of the conductive tube. The side wall of the conductive tube is provided with a threaded through hole 5. The threaded through hole is internally threaded with a binding bolt 6. The wire pressing device comprises a conductive pipe, a threaded through hole is formed in the conductive pipe, a core wire of a power wire inserted into the conductive pipe is pressed and fixed in the conductive pipe, and the threaded through hole is internally provided with a wiring bolt which is of an insulation structure and is made of insulation plastic. An insulating sleeve 7 is connected with one end of the conductive tube connected with the power line, namely one end far away from the circuit substrate in a threaded manner. One end of the insulating sleeve far away from the conductive tube is provided with an insulating ring 8 with an elastic structure. The insulating ring is made of insulating rubber.

The power cord 9 includes a core wire 10 and an insulating sheath 11 wrapped around the core wire. When in wiring, the insulating skin is stripped to expose the core wire, the exposed core wire sequentially passes through the extrusion ring and the insulating sleeve and then is inserted into the conductive pipe, and then the wiring bolt is rotated to press and fix the core wire in the conductive sleeve. The insulating ring is sleeved on the insulating skin of the power line. The inner diameter of the insulating ring is smaller than the outer diameter of the power line, so that dust can be prevented from entering the wiring position.

Claims

1. The utility model provides a control circuit structure of adjustable LED colour temperature, includes circuit substrate and the control circuit of the adjustable LED colour temperature of setting on circuit substrate, circuit substrate is equipped with the introduction power and gives the binding post of the control circuit of adjustable LED colour temperature, a serial communication port, binding post includes the contact tube, be equipped with the insulating layer on the outer peripheral face of contact tube, be equipped with the screw thread through-hole on the lateral wall of contact tube, be equipped with in the screw thread through-hole and insert the terminal bolt of fixing in the contact tube is pressed to the heart yearn of power cord in the contact tube, the terminal bolt is insulation structure.

2. The structure of claim 1, wherein an insulating sleeve is screwed on the end of the conductive tube connected to the power line.

3. The structure of claim 2, wherein an end of the insulating sleeve away from the conductive tube is provided with an insulating ring with an elastic structure, and the insulating ring is made of insulating rubber.

4. The control circuit structure of claim 3, wherein when the power line is connected to the conductive tube, the insulating ring is disposed on the insulating sheath of the power line.

5. The circuit structure of claim 3, wherein an inner diameter of the insulating ring is smaller than an outer diameter of the power line.

6. The control circuit structure of claim 1, wherein the control circuit for adjusting the color temperature of the LED comprises a rectifying circuit, a filtering circuit, a voltage dividing circuit, a photo-coupler circuit, a constant current control circuit, a power supply circuit for supplying power to the constant current control circuit, an output filtering circuit, a voltage stabilizing diode, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a ninth capacitor and a triode, the output end of the rectifying circuit is connected to the input end of the filtering circuit, the output end of the filtering circuit is divided into two paths, one path is connected to the input end of the voltage dividing circuit, and the other path is connected to the input end of the constant current control circuit; the output end of the voltage division circuit is connected with the anode of the voltage stabilizing diode, the cathode of the voltage stabilizing diode is connected with the input end of the opto-coupling circuit, and the input end of the opto-coupling circuit is connected with the eighteenth resistor and the ninth capacitor; the twentieth resistor is connected between the two output ends of the optical coupling circuit, the output end of the optical coupling circuit is also connected with the nineteenth resistor and the base electrode of the triode, and the emitting electrode of the triode is connected with the negative output end of the optical coupling circuit; the output end of the constant current control circuit is connected with the input end of the output filter circuit, a first LED lamp bead is connected between the two output ends of the output filter circuit, and a second LED lamp bead is connected between the output end of the output filter circuit and the collector electrode of the triode.

7. The circuit structure for controlling LED color temperature according to claim 6, wherein the filter circuit comprises a fourth capacitor, an inductor, a fifteenth resistor, a fifth capacitor, a first resistor, a second resistor, and a sixth capacitor, one end of the fourth capacitor is connected in parallel with one end of the inductor and one end of the fifteenth resistor, the other end of the fourth capacitor is connected in parallel with one end of the first resistor, one end of the second resistor, and one end of the sixth capacitor, the other end of the first resistor and the other end of the second resistor are simultaneously connected with one end of the fifth capacitor, and the other end of the fifteenth resistor, the other end of the inductor, the other end of the fifth capacitor, and the other end of the sixth capacitor are connected in parallel with the output end of the filter circuit.

8. The control circuit structure of claim 6, wherein the constant current control circuit comprises a constant current control chip, a first pin of the constant current control chip is connected to the power supply circuit, one end of a twelfth resistor and one end of a third capacitor, and the other end of the twelfth resistor is connected to the output filter circuit; a second pin of the constant current control chip is connected with one end of a seventh resistor; a third pin of the constant current control chip is respectively connected with an anode of a first diode and one end of a second capacitor, a cathode of the first diode is respectively connected with one end of a fifth resistor, one end of a sixth resistor and one end of the first capacitor, and the other end of the fifth resistor is connected with the input end of the constant current control circuit; a fourth pin of the constant current control chip is grounded; a fifth pin of the constant current control chip is connected with one end of a ninth resistor and one end of an eleventh resistor respectively; a sixth pin of the constant current control chip is connected with one end of a third resistor and one end of a fourth resistor in parallel, and the other ends of the third resistor and the fourth resistor are grounded simultaneously; the other end of the sixth resistor, the other end of the first capacitor, the other end of the third capacitor, the other end of the seventh resistor and the other end of the second capacitor are all grounded.

9. The control circuit structure of claim 8, wherein the power supply circuit comprises a third diode, a fourteenth resistor, a thirteenth resistor, a fourth diode and a second polarity capacitor, anodes of the third diode, the fourteenth resistor, the thirteenth resistor and the fourth diode are sequentially connected, a cathode of the fourth diode is connected to the first pin of the constant current control chip, an anode of the second polarity capacitor is connected between the fourteenth resistor and the thirteenth resistor, and a cathode of the second polarity capacitor is grounded.

10. The control circuit structure of adjustable LED colour temperature of claim 6, characterized in that, the output filter circuit includes second diode, tenth resistance and first polarity electric capacity, the negative pole of the second diode respectively with one end of the tenth resistance with the positive pole of the first polarity electric capacity be connected, the other end of the tenth resistance with the negative pole of the first polarity electric capacity be connected in parallel the negative pole end of the first LED lamp pearl.