CN108419329B - LED lamp dimming method, dimming module and lamp - Google Patents

LED lamp dimming method, dimming module and lamp Download PDF

Info

Publication number
CN108419329B
CN108419329B CN201810097776.8A CN201810097776A CN108419329B CN 108419329 B CN108419329 B CN 108419329B CN 201810097776 A CN201810097776 A CN 201810097776A CN 108419329 B CN108419329 B CN 108419329B
Authority
CN
China
Prior art keywords
led lamp
path
current
current source
lamp beads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810097776.8A
Other languages
Chinese (zh)
Other versions
CN108419329A (en
Inventor
邓胜奇
张志源
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Topday Optoelectronics Technology Co ltd
Original Assignee
Foshan Topday Optoelectronics Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Topday Optoelectronics Technology Co ltd filed Critical Foshan Topday Optoelectronics Technology Co ltd
Priority to CN201810097776.8A priority Critical patent/CN108419329B/en
Publication of CN108419329A publication Critical patent/CN108419329A/en
Application granted granted Critical
Publication of CN108419329B publication Critical patent/CN108419329B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The LED lamp dimming method of the invention adopts three lamp beads with different color temperatures and adopts a variable constant current source to detect the line current, therefore, the current distribution proportion of the three paths of lamp beads is adjusted, only the first path of LED lamp beads L1 are lighted before the LED lamp is increased to a certain power P2 from the minimum power Pmin, the brightness of the LED lamp increases in a linear trend along with the process of increasing the power to P1, meanwhile, the LED lamp starts from a certain power P2, the second path of LED lamp beads L2 are lightened, the brightness of the LED lamp is increased in a linear trend along with the increase of the power, when the power of the LED lamp is increased to P1, the third path of LED lamp bead L3 is lightened, the brightness of the LED lamp bead L1 is increased in a linear trend along with the increase of power, the brightness of the LED lamp bead L1 is decreased in a linear trend from P1, the invention also provides a dimming module for realizing the dimming method.

Description

LED lamp dimming method, dimming module and lamp
Technical Field
The invention belongs to the technical field of LED lamp dimming, and particularly relates to an LED lamp dimming method, a dimming module and a lamp.
Background
In a conventional incandescent lamp, the color temperature changes with the brightness. The color temperature is lower at low brightness (e.g., 2200k) and higher at high brightness (e.g., 3000 k). Therefore, when the user adjusts the light of the lamp through the light adjuster, the color temperature of the lamp is adjusted at the same time, and the effect of adjusting the environment atmosphere is achieved.
In contrast, the color temperature of an LED light source is less affected by brightness and can be considered substantially a constant color temperature output. Therefore, in the process of dimming of the common LED lamp, the color temperature is basically constant. In the process of replacing incandescent lamps with LED lamps, many users have demanded that LED lamps have a low color temperature while dimming their brightness with a dimmer, as in the case of conventional incandescent lamps. Achieving the similar effect of adjusting the environment atmosphere.
For such a requirement, the conventional LED lamp color temperature adjusting scheme has the following advantages and disadvantages:
1. the lamp panel is provided with two lamp beads (such as 2200k and 3000k) with different color temperatures. The current percentages of the two paths of lamp beads are determined by detecting the value of the output total current through the single chip microcomputer. If the output current is detected to be larger, 3000k of lamp beads are distributed with larger current percentage, and 2200k of lamp beads are distributed with smaller current percentage; when the user turns down the brightness of the lamp, the information is detected through the single chip microcomputer, the current percentage of 3000k lamp beads is turned down, and the current percentage of 2200k lamp beads is turned up. The scheme has the advantages of high control precision and capability of randomly designing the color temperature change curve of the lamp according to the requirements of customers. The disadvantages are too complex circuit, high cost and difficult popularization.
2. The lamp panel is provided with two lamp beads (such as 2200k and 3000k) with different color temperatures. Through a simple circuit, the output current distribution of the two paths of lamp beads is changed according to the curve shown in figure 1. The method is characterized in that after the total output current reaches a certain value (200 mA in figure 1), the current of the high-color-temperature lamp bead starts to rapidly increase from 0, and the current of the low-color-temperature lamp bead starts to decrease from the maximum value. Over a considerable length of the range below this total current value, there is no change in the color temperature of the lamp. Such a color temperature adjustment curve is often difficult to satisfy the requirement that the guest has color temperature change in the whole dimming range.
Disclosure of Invention
The invention aims to provide a simple, reliable and low-cost dimming method. The circuit current is detected by adopting three lamp beads with different color temperatures and adopting the variable constant current source, so that the current distribution proportion of the three lamp beads is adjusted, the effect of adjusting the color temperature of the lamp is achieved, the change of the color temperature in the whole dimming range can be realized, the circuit is simple, the cost is greatly reduced, the production process is simplified, and the high cost performance is realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
an LED lamp dimming method relates to an LED lamp which comprises three paths of lamp beads with different color temperatures, wherein the lamp beads comprise a first path of LED lamp bead L1, a second path of LED lamp bead L2 and a third path of LED lamp bead L3, the color temperature L1 of the three paths of LED lamp beads is more than L2 and less than L3, and the current distribution proportion of the three paths of LED lamp beads with different color temperatures is controlled by the following method:
the LED lamp is increased to a certain power P1 from the minimum power Pmin, the current of the first path of LED lamp beads L1 is increased in a linear trend, the current of the LED lamp is increased to the maximum power Pmax from a certain power P1, and the current of the first path of LED lamp beads L1 is decreased in a linear trend;
the power of the LED lamp is increased from a certain power P2 to the maximum power Pmax, the current of the second path of LED lamp beads L2 is increased in a linear trend, and Pmin is more than P2 and more than P1;
and the current of the LED lamp bead L3 of the third path increases in a linear trend from a certain power P3 to the maximum power Pmax, wherein P2 is more than or equal to P0 is more than or equal to P3 is more than or equal to P0 ', P2 is more than or equal to P0 is more than or equal to P1 is more than or equal to P0 ', and P0 and P0 ' are certain powers between P2 and Pmax.
According to the dimming method, only the first path of LED lamp beads L1 are lighted before the LED lamp is increased to a certain power P2 from the minimum power Pmin, the brightness of the LED lamp is increased in a linear trend along with the process that the power is increased to P1, meanwhile, the LED lamp is lighted from a certain power P2, the second path of LED lamp beads L2 are lighted, the brightness of the LED lamp is increased in a linear trend along with the increase of the power, meanwhile, when the power of the LED lamp is increased to P3, the third path of LED lamp beads L3 are lighted, the brightness of the LED lamp is increased in a linear trend along with the increase of the power, the brightness of the first path of LED lamp beads L1 is decreased in a linear trend from P1, the color temperature of the LED lamp is increased in a linear trend along with the increase of the power, and the effect of synchronous.
Pmin of the present invention is generally the lowest power, typically 0W or close to 0W, that the dimmer of the LED lamp can adjust to, and Pmax of the present invention is generally the maximum power that the dimmer of the LED lamp can adjust to. P1, P2, P3, P0 and P0' are adjusted according to the actual dimming needs. Ideally, the control P1 is the best P3, but it is difficult for the practical circuit to ensure that P1 and P3 are completely matched, so a smaller power interval is defined by P0 and P0', so that both P1 and P3 are in the power interval, and the requirement of smooth connection of color temperature mixing is met.
The linear trend of the invention refers to increasing or decreasing according to a certain linearity, and the related first path of LED lamp bead L1, second path of LED lamp bead L2 and second path of LED lamp bead L3 form a current curve by using the power of the LED lamp as a main variable, and there may be individual points or intervals with deviation, but the trend is increasing or decreasing as a whole.
Furthermore, P0 '-P0 is 30% Pmax, and P1 and P3 are close to each other by reasonably selecting P0' and P0, so that the color temperature mixing and connection of the third path of LED lamp beads L3 and the first path of LED lamp beads L1 in the dimming process are smoother, and the dimming and color temperature tuning have better linearity.
Further, before the power of the LED lamp is less than P1, the current of the second path of LED lamp bead L2 is controlled to be less than the current of the first path of LED lamp bead L1, so that the first path of LED lamp bead L1 and the second path of LED lamp bead L2 form a current curve with the power of the LED lamp as a main variable, and the curve corresponding to the second path of LED lamp bead L2 is below the curve corresponding to the first path of LED lamp bead L1, so that the LED lamp can be dimmed and dimmed by the first path of LED lamp bead L1 and the second path of LED lamp bead L2 before the power of the LED lamp is P1, thereby satisfying the linear adjustment effect.
The dimming module used in the dimming method of the present invention comprises: the LED lamp comprises a rectifying circuit and an LED light-emitting module, wherein the rectifying circuit comprises a first path of LED lamp beads L1, a second path of LED lamp beads L2 and a third path of LED lamp beads L3, and the color temperature of the three paths of LED lamp beads is more than L1 and less than L2 and less than L3; a constant current source, a first current controllable current source, and a second current controllable current source;
the input end and the output end of the constant current source are respectively connected with the rectifying circuit and the first current controllable current source, and the output end of the first current controllable current source is connected with the rectifying circuit;
the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the input end of the constant current source, and the output ends of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the second current controllable current source;
the output end of the second current controllable current source is connected with the constant current source and the first current controllable current source, the input end of the second path of LED lamp beads L2 is connected with the output end of the constant current source, and the output end of the second path of LED lamp beads L2 is connected with the first current controllable current source;
the first current controllable current source and the constant current source control the total current S1 passing through the first path of LED lamp beads L1, the third path of LED lamp beads L3 and the current S2 passing through the third path of LED lamp beads L2 according to the change of the output voltage of the light modulation process rectifying circuit, so that the percentages of S1 and S2 change according to a linear trend; the second current controllable current source adjusts the current of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 to change according to a linear trend according to the current value of S1.
Through the dimming module, the effect of synchronously adjusting the brightness and the color temperature of the LED lamp can be realized.
Furthermore, the output end of the rectifying circuit is connected with a voltage control power supply in parallel, and the voltage control circuit adjusts the internal reference level according to the average value of the output voltage of the rectifying circuit, so that the input power of the LED lamp is not changed greatly when the accessed commercial power fluctuates in a certain range.
The active load can provide the current for the silicon controlled rectifier to work when the voltage output by the rectifying circuit is lower, so that the dimming effect is improved; the silicon controlled rectifier refers to an external silicon controlled rectifier dimmer.
The LED lamp comprises a lampshade, a light diffusion piece and the dimming module, wherein the lampshade is provided with an installation cavity with an opening on one side, the dimming module is arranged in the installation cavity, the light diffusion piece is arranged at the opening of the installation cavity, and the input end of the dimming module is communicated with an external power supply.
Compared with the prior art, the LED lamp provided by the invention achieves the effect of synchronously adjusting the brightness and the color temperature of the LED lamp through the dimming module and the dimming method, can realize the change of the color temperature in the whole dimming range, has simple circuit, greatly reduces the cost, simplifies the production process and realizes high cost performance.
Drawings
FIG. 1 is a graph of two conventional dimming and toning temperature curves;
FIG. 2 is a table showing the relationship between the dimming percentage and the current distribution of each path of lamp beads in the embodiment;
FIG. 3 is a graph of the variation of each path of lamp beads along with the input power of the LED lamp in the embodiment;
FIG. 4 is a table showing the relationship among input power, luminous flux and color temperature of the LED lamp in the embodiment;
FIG. 5 is a graph showing the input power, luminous flux and color temperature of the LED lamp in the embodiment;
FIG. 6 is a schematic block diagram of a circuit in an embodiment;
fig. 7 is a schematic circuit diagram in an embodiment.
In the circuit diagrams in fig. 6 and 7, I1 is a current of a first path of LED lamp bead L1, I2 is a current of a second path of LED lamp bead L2, I3 is a current of a third path of LED lamp bead L3, F1 is a current fuse, RV1 is a varistor, BD1 is a zener diode, U1-U4 is an integrated circuit, R1-R25 are resistors, C1-C2 are capacitors, EC1-EC2 are patch electrolytic capacitors, D1-D7 are diodes, and Q1 is an N-type MOS transistor.
Detailed Description
Referring to fig. 2 to 5, in this embodiment, 2200K, 2700K, and 3000K are taken as examples of the first path of LED lamp bead L1, the second path of LED lamp bead L2, and the third path of LED lamp bead L3, respectively, to illustrate the technical solution of the present invention.
An LED lamp dimming method relates to an LED lamp which comprises three paths of lamp beads with different color temperatures, wherein the lamp beads comprise a first path of LED lamp bead L1, a second path of LED lamp bead L2 and a third path of LED lamp bead L3, and the current distribution proportion of the three paths of LED lamp beads with different color temperatures is controlled by the following method:
the LED lamp starts to increase to a certain power P1 from the minimum power Pmin, the current of the first path of LED lamp beads L1 increases in a linear trend from Pmin to P1, the P1 is about 36% Pmax, the power of the LED lamp increases from P1 to the maximum power Pmax, and the current of the first path of LED lamp beads L1 decreases in a linear trend;
the LED lamp is started to be lightened from a certain power P2 and is increased to the maximum power Pmax, the current of the second path of LED lamp beads L2 is increased in a linear trend, and the P2 is about 2.6% Pmax;
and increasing the power of the LED lamp from P3 to the maximum power Pmax, wherein the current of the third LED lamp bead L3 increases in a linear trend, wherein P2 is not less than P0 is not less than P3 is not less than P0 ', P2 is not less than P0 is not less than P1 is not less than P0', and P0 '-P0 is 30% Pmax, by reasonably selecting P0' and P0, P1 and P3 are close to each other, in the embodiment, taking P1 as P3 is about to achieve smooth mixing and connection of the color temperatures of the third LED lamp bead L3 and the first LED lamp bead L1 in the dimming process, so that dimming and color temperature regulation have better linearity, and in the embodiment, P3 is about 36% Pmax.
According to the dimming method, only the first path of LED lamp beads L1 is lighted before the LED lamp is increased from the minimum power Pmin to a certain power of about 2.6% Pmax (stage 1), the brightness of the first path of LED lamp beads is increased in a linear trend along with the increase of the power to the P1 process, meanwhile, the LED lamp is lighted from a certain power of 2.6% Pmax, the second path of LED lamp beads L2 is lighted (stage 2), the brightness of the second path of LED lamp beads is increased in a linear trend along with the increase of the power, meanwhile, when the power of the LED lamp is increased to about 36% Pmax, the third path of LED lamp beads L3 is lighted (stage 3), the brightness of the third path of LED lamp beads is increased in a linear trend along with the increase of the power, the brightness of the first path of LED lamp beads L1 is decreased in a linear trend along with the increase of the power, so that the brightness of the LED lamp is increased in.
Preferably, as shown in fig. 3, before the power of the LED lamp is less than P1 and about 36% Pmax, the current of the second path of LED lamp bead L2 is controlled to be less than the current of the first path of LED lamp bead L1, so that the first path of LED lamp bead L1 and the second path of LED lamp bead L2 form a current curve with the power of the LED lamp as a main variable, and the curve corresponding to the second path of LED lamp bead L2 is below the curve corresponding to the first path of LED lamp bead L1, so that the LED lamp can adjust the light and color temperature through the first path of LED lamp bead L1 and the second path of LED lamp bead L2 before P1, thereby satisfying the linear adjustment effect.
Referring to fig. 6, the present invention further provides a dimming module for the dimming method, which includes a rectification circuit, an LED lighting module, a constant current source, a first current controllable current source, and a second current controllable current source, where the LED lighting module includes a first path of LED lamp beads L1, a second path of LED lamp beads L2, and a third path of LED lamp beads L3, and a color temperature of the three paths of LED lamp beads L1 is greater than L2 and less than L3; the input end and the output end of the constant current source are respectively connected with the rectifying circuit and the first current controllable current source, and the output end of the first current controllable current source is connected with the rectifying circuit; the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the input end of the constant current source, and the output ends of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the second current controllable current source; the output end of the second current controllable current source is connected with the constant current source and the first current controllable current source, the input end of the second path of LED lamp beads L2 is connected with the output end of the constant current source, and the output end of the second path of LED lamp beads L2 is connected with the first current controllable current source; the first current controllable current source and the constant current source control the total current S1 passing through the first path of LED lamp beads L1 and the third path of LED lamp beads L3 and the current S2(I2) of the third path of LED lamp beads L2 according to the change of the output voltage of the dimming process rectifying circuit, so that the percentages of S1 and S2 change according to a linear trend; the second current controllable current source adjusts the currents I1 and I3 of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 to change according to a linear trend according to the current value of S1.
Referring to fig. 6, the rectifier circuit includes a current fuse F1, a voltage dependent resistor RV1 and a zener diode BD1, which is used to convert the ac mains input into the input of the dimming module and provide protection against lightning strikes and circuit abnormalities that may occur in actual use.
Referring to fig. 6, the first current controllable current source includes U3, D3, R7, and R14, and the constant current source includes U1, D6, R1, and R4; the two circuits are used for controlling the current percentages of the S1 and the S2 to change according to certain linearity according to the change of the output voltage of the rectifying circuit in the dimming process.
Referring to fig. 6, the second controllable current source includes U5, D7, R23 and R24, which adjust the currents I1 and I3 of the first LED lamp bead L1 and the third LED lamp bead L3 according to the current value of S1.
Referring to fig. 6, preferably, the output end of the rectifying circuit is connected in parallel with a voltage control power supply, which includes U4, Q1, D4, R1, R17, R18, R2, R12, R19, R3, R13, C1 and C2, and the voltage control circuit adjusts an internal reference level according to an average value of output voltages of the rectifying circuit, so as to ensure that the input power of the LED lamp does not change too much when the input mains supply fluctuates in a certain range.
Preferably, the dimming module further comprises an active load, which includes U2, R21 and R10, two ends of the active load are respectively connected to the output ends of the constant current source and the first current controllable current source, and the active load can provide a current for operating the thyristor when the voltage output by the rectifying circuit is low, so as to improve the dimming effect; the silicon controlled rectifier refers to an external silicon controlled rectifier dimmer.
The curve of the change of the color temperature with the dimming angle can be adjusted by the values of R4 and R14, and R23 and R24, that is, by setting the values of R4 and R14, the current flowing through S1 and S2 satisfies the relationship of S1 > S2, so that in the aforementioned stage 1, I1 > I2 can be obtained because I3 is 0, and 2200k lamp beads are lighted first. In both stage 2 and stage 3, S1 and S2 rise with a certain linearity. By adjusting the resistance values of the two resistors, the value of P1 and the rising slopes of I1 and I2 can be adjusted within a certain range.
By setting the values of R23 and R24 such that when S1 is less than (reference voltage) Vref/(R23+ R24), I3 is 0; when S1 rises to Vref/(R23+ R24), I1 begins to fall, while I3 begins to rise rapidly. By adjusting the values of the two resistors, the value of P2 and the slopes of the changes of I1 and I3 can be adjusted within a certain range.
In addition, the invention also provides an LED lamp (not shown in the figure), which comprises a lampshade, a light diffusion piece and the dimming module, wherein the lampshade is provided with an installation cavity with an opening at one side, the dimming module is arranged in the installation cavity, the light diffusion piece is arranged at the opening of the installation cavity, and the input end of the dimming module is communicated with an external power supply.
Compared with the prior art, the LED lamp provided by the invention achieves the effect of synchronously adjusting the brightness and the color temperature of the LED lamp through the dimming module and the dimming method, can realize the change of the color temperature in the whole dimming range, has simple circuit, greatly reduces the cost, simplifies the production process and realizes high cost performance.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (7)

  1. The LED lamp dimming method relates to a dimming module, and the dimming module comprises a rectifying circuit, an LED light-emitting module, a constant current source, a first current controllable current source and a second current controllable current source, wherein the LED light-emitting module comprises a first path of LED lamp bead L1, a second path of LED lamp bead L2 and a third path of LED lamp bead L3, and the color temperature L1 of the three paths of LED lamp beads is more than L2 and more than L3; the input end and the output end of the constant current source are respectively connected with the rectifying circuit and the first current controllable current source, and the output end of the first current controllable current source is connected with the rectifying circuit;
    the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the input end of the constant current source, and the output ends of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the second current controllable current source;
    the output end of the second current controllable current source is connected with the constant current source and the first current controllable current source, the input end of the second path of LED lamp beads L2 is connected with the output end of the constant current source, and the output end of the second path of LED lamp beads L2 is connected with the first current controllable current source; the first current controllable current source and the constant current source control the total current S1 passing through the first path of LED lamp beads L1 and the third path of LED lamp beads L3 and the current S2 passing through the second path of LED lamp beads L2 according to the change of the output voltage of the light modulation process rectifying circuit, so that the percentages of S1 and S2 change according to a linear trend; the second current controllable current source adjusts the current of the first path of LED lamp bead L1 and the current of the third path of LED lamp bead L3 to change according to a linear trend according to the current value of S1;
    controlling the current distribution proportion of three paths of LED lamp beads with different color temperatures by the following method:
    the LED lamp is increased to a certain power P1 from the minimum power Pmin, the current of the first path of LED lamp beads L1 is increased in a linear trend, the current of the LED lamp is increased to the maximum power Pmax from a certain power P1, and the current of the first path of LED lamp beads L1 is decreased in a linear trend;
    the LED lamp is increased to the maximum power Pmax from a certain power P2, the current of the second path of LED lamp beads L2 is increased in a linear trend, and Pmin is more than P2 and more than P1;
    and the LED lamp is increased to the maximum power Pmax from a certain power P3, the current of the third path of LED lamp bead L3 is increased in a linear trend, wherein P2 is more than or equal to P0 is more than or equal to P3 is more than or equal to P0 ', P2 is more than or equal to P0 is more than or equal to P1 is more than or equal to P0 ', and P0 and P0 ' are certain powers between P2 and Pmax.
  2. 2. The LED lamp dimming method according to claim 1, wherein: p0' -P0 is 30% Pmax.
  3. 3. The LED lamp dimming method according to claim 1, wherein: and before the power of the LED lamp is smaller than P1, controlling the current of the second path of LED lamp beads L2 to be smaller than the current of the first path of LED lamp beads L1.
  4. 4. The module of adjusting luminance, its characterized in that: the LED constant current source comprises a rectifying circuit, an LED light-emitting module, a constant current source, a first current controllable current source and a second current controllable current source;
    the light emitting module comprises a first path of LED lamp beads L1, a second path of LED lamp beads L2 and a third path of LED lamp beads L3, and the color temperature of the three paths of LED lamp beads is more than L1 and less than L2 and less than L3;
    the input end and the output end of the constant current source are respectively connected with the rectifying circuit and the first current controllable current source, and the output end of the first current controllable current source is connected with the rectifying circuit;
    the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the input end of the constant current source, and the output ends of the first path of LED lamp bead L1 and the third path of LED lamp bead L3 are respectively connected with the second current controllable current source;
    the output end of the second current controllable current source is connected with the constant current source and the first current controllable current source, the input end of the second path of LED lamp beads L2 is connected with the output end of the constant current source, and the output end of the second path of LED lamp beads L2 is connected with the first current controllable current source;
    the first current controllable current source and the constant current source control the total current S1 passing through the first path of LED lamp beads L1 and the third path of LED lamp beads L3 and the current S2 passing through the second path of LED lamp beads L2 according to the change of the output voltage of the light modulation process rectifying circuit, so that the percentages of S1 and S2 change according to a linear increasing trend; the second current controllable current source adjusts the current of the first path of LED lamp bead L1 to change according to a linear decreasing trend and the current of the third path of LED lamp bead L3 to change according to a linear increasing trend according to the current value of S1.
  5. 5. The dimming module of claim 4, wherein: the output end of the rectifying circuit is connected with a voltage control power supply in parallel.
  6. 6. The dimming module of claim 5, wherein: the active load is further included, and two ends of the active load are respectively connected with the output ends of the constant current source and the first current controllable current source.
  7. LED lamps and lanterns, include lamp shade, light diffusion piece and the module of adjusting luminance, be equipped with one side open-ended installation cavity on the lamp shade, adjust luminance the module and locate the installation cavity, the opening part of installation cavity, its characterized in that are located to the light diffusion piece: the dimming module of any one of claims 4 to 6.
CN201810097776.8A 2018-01-31 2018-01-31 LED lamp dimming method, dimming module and lamp Active CN108419329B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810097776.8A CN108419329B (en) 2018-01-31 2018-01-31 LED lamp dimming method, dimming module and lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810097776.8A CN108419329B (en) 2018-01-31 2018-01-31 LED lamp dimming method, dimming module and lamp

Publications (2)

Publication Number Publication Date
CN108419329A CN108419329A (en) 2018-08-17
CN108419329B true CN108419329B (en) 2020-09-29

Family

ID=63127315

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810097776.8A Active CN108419329B (en) 2018-01-31 2018-01-31 LED lamp dimming method, dimming module and lamp

Country Status (1)

Country Link
CN (1) CN108419329B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103997835A (en) * 2014-05-29 2014-08-20 横店集团得邦照明股份有限公司 LED illumination control circuit for silicon controlled light modulator to achieve light and color synchronous adjustment and method thereof
CN105723803A (en) * 2013-11-04 2016-06-29 飞利浦照明控股有限公司 Light unit for emitting light and method for driving a light unit
CN106793330A (en) * 2017-01-09 2017-05-31 江苏宜美照明科技股份有限公司 Dim the circuit of color-temperature regulating
CN206350202U (en) * 2017-01-09 2017-07-21 江苏宜美照明科技股份有限公司 Dim the circuit of color-temperature regulating
CN107041039A (en) * 2017-05-09 2017-08-11 易美芯光（北京）科技有限公司 A kind of LED light engine module of tunable optical toning

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8710754B2 (en) * 2011-09-12 2014-04-29 Juno Manufacturing Llc Dimmable LED light fixture having adjustable color temperature
EP2797386B1 (en) * 2013-04-23 2018-06-13 Nxp B.V. A dimmable LED lighting circuit, a controller therefor and method of controlling a dimmable LED lighting circuit
CN203340370U (en) * 2013-07-04 2013-12-11 厦门锜仕达光电科技有限公司 LED lamp capable of adjusting color temperature
CN203896560U (en) * 2014-05-29 2014-10-22 横店集团得邦照明股份有限公司 LED illumination control circuit used for realizing light and color simultaneous adjustment by silicon controlled rectifier light modulator
CN105992437A (en) * 2015-02-13 2016-10-05 凹凸电子（武汉）有限公司 Light source drive circuit and light source module
CN107046747B (en) * 2016-02-06 2019-08-20 陕西亚成微电子股份有限公司 A kind of LED light adjusting control circuit
FI128220B (en) * 2016-02-24 2019-12-31 Teknoware Oy LED light source and method for regulating the colour or colour temperature of the LED light source
CN106332369B (en) * 2016-10-10 2018-11-06 深圳迪亚士照明科技有限公司 LED light bar light modulation toning circuit temperature
CN106793344A (en) * 2017-02-20 2017-05-31 深圳市明微电子股份有限公司 The linear constant current driving power supply and LED light emission device of a kind of compatible toning of controllable silicon light modulation
CN107094329B (en) * 2017-05-03 2019-01-29 矽力杰半导体技术(杭州)有限公司 LED drive circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105723803A (en) * 2013-11-04 2016-06-29 飞利浦照明控股有限公司 Light unit for emitting light and method for driving a light unit
CN103997835A (en) * 2014-05-29 2014-08-20 横店集团得邦照明股份有限公司 LED illumination control circuit for silicon controlled light modulator to achieve light and color synchronous adjustment and method thereof
CN106793330A (en) * 2017-01-09 2017-05-31 江苏宜美照明科技股份有限公司 Dim the circuit of color-temperature regulating
CN206350202U (en) * 2017-01-09 2017-07-21 江苏宜美照明科技股份有限公司 Dim the circuit of color-temperature regulating
CN107041039A (en) * 2017-05-09 2017-08-11 易美芯光（北京）科技有限公司 A kind of LED light engine module of tunable optical toning

Also Published As

Publication number Publication date
CN108419329A (en) 2018-08-17

Similar Documents

Publication Publication Date Title
TWI708523B (en) Control circuit for a led lighting system, and method for controlling a led lighting system
CN109076663B (en) Method for controlling lighting device, lighting control circuit and lighting system
US8890419B2 (en) System and method providing LED emulation of incandescent bulb brightness and color response to varying power input and dimmer circuit therefor
US8786202B2 (en) Lighting device and method of controlling light emitted thereby
KR20170117372A (en) Current splitter for led lighting system
US9055650B2 (en) Energy saving dimmer for LED luminaire driver
US8890437B2 (en) Method and system of automatically adjusting light intensity of a lighting fixture having multiple emitters
US11071183B2 (en) Lighting apparatus
US8766547B2 (en) Lighting device and method of controlling light emitted thereby
US9591706B2 (en) Universal voltage LED power supply with regenerating power source circuitry, non-isolated load, and 0-10V dimming circuit
KR100535960B1 (en) Power supply for traffic signal lamp
CN109716862B (en) Dimming warming controller for LED
CN212115733U (en) Light modulation circuit
JP2013225511A (en) Light control circuit
JP6391856B2 (en) LED lighting module
KR200285442Y1 (en) A temperature compensated LED Traffic Signal Module Controller maintaining constant luminous intensity
CN108419329B (en) LED lamp dimming method, dimming module and lamp
CN201533439U (en) Gradually dimmable lamp cup type cold light lamp control system
CN209659659U (en) A kind of brightness-adjusting of LED light source and the device of colour temperature
CN101799130A (en) Illumination device with automatic dimming function
CN101702859B (en) Lamp cup type cold light lamp control system capable of adjusting light one by one
Fan et al. A simplified LED converter design and implement
CN104780695A (en) LED stepless dimming constant current drive power source
KR200322433Y1 (en) Power supply circuit to maintain even light-source of LED signal lamp
US20220232676A1 (en) Thyristor regulation circuit for high-voltage led strip light

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: LED lamp dimming method, dimming module and lamp

Effective date of registration: 20211220

Granted publication date: 20200929

Pledgee: Guangdong Shunde Rural Commercial Bank Co.,Ltd. science and technology innovation sub branch

Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd.

Registration number: Y2021980015722