CN220087517U - Light intensity and color temperature linkage circuit for dimming LED lamp - Google Patents
Light intensity and color temperature linkage circuit for dimming LED lamp Download PDFInfo
- Publication number
- CN220087517U CN220087517U CN202321638487.7U CN202321638487U CN220087517U CN 220087517 U CN220087517 U CN 220087517U CN 202321638487 U CN202321638487 U CN 202321638487U CN 220087517 U CN220087517 U CN 220087517U
- Authority
- CN
- China
- Prior art keywords
- color temperature
- circuit
- resistor
- light
- light intensity
- 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
Links
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a light intensity and color temperature linkage circuit for a dimming LED lamp, which comprises a high-color temperature LED circuit, a low-color temperature LED circuit and a current distribution circuit, wherein the current distribution circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an integrated circuit; the light intensity and color temperature linkage circuit is formed by adopting a universal linear constant current chip and four resistors, and the cost is low.
Description
Technical Field
The utility model relates to a light intensity and color temperature linkage circuit, in particular to a light intensity and color temperature linkage circuit for a dimming LED lamp.
Background
When the brightness of the dimming LED lamp capable of simulating the change of sunlight is adjusted, the luminous intensity of the dimming LED lamp is in direct proportion to the connected driving current, the luminous color temperature of the dimming LED lamp changes along with the change of the luminous intensity, and the lower the luminous intensity of the dimming LED lamp is, the lower the luminous color temperature of the dimming LED lamp is; conversely, the higher the luminous intensity of the dimming LED lamp, the higher the luminous color temperature thereof.
The dimming LED lamp is provided with a light intensity and color temperature linkage circuit for realizing the change of the luminous color temperature along with the change of luminous intensity. As shown in fig. 1, the existing light intensity and color temperature linkage circuit generally includes a high color temperature LED circuit, a low color temperature LED circuit, and a current distribution circuit, when a driving current is connected, the current distribution circuit provides driving currents with different magnitudes for the high color temperature LED circuit and the low color temperature LED circuit, so that mixed lights with different color temperatures are generated by the high color temperature LED circuit and the low color temperature LED circuit, and when the ratio of the light emission intensity of the high color temperature LED circuit to the light emission intensity of the low color temperature LED circuit is different, the color temperature of the generated mixed lights is different, the color temperature is between the light emission color temperature of the high color temperature LED circuit and the light emission color temperature of the low color temperature LED circuit, and the higher the ratio of the light emission intensity of the high color temperature LED circuit and the light emission intensity of the low color temperature LED circuit is, the color temperature of the mixed lights is lower. The high color temperature LED circuit is provided with a positive electrode and a negative electrode, and when the positive electrode and the negative electrode are connected with current, the luminous intensity of the high color temperature LED circuit is in direct proportion to the connected current. The low color temperature LED circuit is provided with a positive electrode and a negative electrode, and when the positive electrode and the negative electrode are connected with current, the luminous intensity of the low color temperature LED circuit is in direct proportion to the connected current. The current distribution circuit is provided with a first output end, a second output end and a negative electrode, the sum of the currents of the first output end and the second output end of the current distribution circuit is equal to the total current flowing through the negative electrode of the current distribution circuit, and when the currents with different magnitudes flow through the negative electrode of the current distribution circuit, the current magnitude ratio of the first output end and the second output end is different. The positive electrode of the high-color temperature LED circuit is connected with the positive electrode of the low-color temperature LED circuit, the connecting end of the positive electrode is the positive input end of the light intensity and color temperature linkage circuit, the negative electrode of the high-color temperature LED circuit is connected with the first output end of the current distribution circuit, the negative electrode of the low-color temperature LED circuit is connected with the second output end of the current distribution circuit, and the negative electrode of the current distribution circuit is the negative input end of the light intensity and color temperature linkage circuit. The smaller the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit, the smaller the total luminous intensity of the high color temperature LED circuit and the low color temperature LED circuit, and meanwhile, the smaller the ratio of the current output by the first output end of the current distribution circuit to the current output by the second output end is, the lower the color temperature of mixed light generated by the light emission of the high color temperature LED circuit and the low color temperature LED circuit is. The larger the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit is, the larger the total luminous intensity of the high color temperature LED circuit and the low color temperature LED circuit is, the larger the ratio of the current output by the first output end of the current distribution circuit to the current output by the second output end is, and the higher the color temperature of mixed light generated by the light emission of the high color temperature LED circuit and the low color temperature LED circuit is. Therefore, through the light intensity and color temperature linkage circuit, the dimming LED lamp can simulate the effect of sunlight change, namely, the color temperature is lower when the luminous intensity is lower in the morning and evening, and the color temperature is higher when the luminous intensity is higher in the noon.
However, in the existing light intensity and color temperature linkage circuit, the current distribution circuit is realized by adopting a special current distribution circuit, and the special current distribution circuit is realized based on a specially designed integrated chip, so that the cost is higher, and the light intensity and color temperature linkage circuit is higher.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a light intensity and color temperature linkage circuit for a dimming LED lamp, which is low in cost.
The technical scheme adopted for solving the technical problems is as follows: the light intensity and color temperature linkage circuit for the dimming LED lamp comprises a high color temperature LED circuit, a low color temperature LED circuit and a current distribution circuit, wherein the high color temperature LED circuit is provided with a positive electrode and a negative electrode, the low color temperature LED circuit is provided with a positive electrode and a negative electrode, the current distribution circuit is provided with a first output end, a second output end and a negative electrode, the working voltage of the high color temperature LED circuit is larger than that of the low color temperature LED circuit, the positive electrode of the high color temperature LED circuit is connected with the positive electrode of the low color temperature LED circuit, the connection end of the high color temperature LED circuit is the positive input end of the light intensity and color temperature linkage circuit, the negative electrode of the high color temperature LED circuit is connected with the first output end of the current distribution circuit, the negative electrode of the current distribution circuit is the negative input end of the light intensity and color temperature linkage circuit, the current distribution circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an integrated circuit, the connection end of the positive electrode of the high color temperature LED circuit is the positive input end of the light intensity and color temperature linkage circuit, the negative electrode of the high color temperature LED circuit is connected with the first output end of the current distribution circuit, the negative electrode of the low color temperature LED circuit is connected with the first output end of the current distribution circuit, the negative electrode of the current distribution circuit is connected with the first output end of the fourth resistor, the current distribution circuit is connected with the fourth resistor, the fourth resistor is connected with the fourth resistor, and the connecting end is the negative electrode of the current distribution circuit.
The integrated circuit is realized by adopting a linear constant current driving chip with the model of SM 2082.
Compared with the prior art, the utility model has the advantages that the light intensity and color temperature linkage circuit is formed by adopting the universal linear constant current chip and four resistors, and the universal linear constant current chip is low in price, so that the light intensity and color temperature linkage circuit is low in cost.
Drawings
FIG. 1 is a schematic diagram of a light intensity and color temperature linkage circuit for dimming an LED lamp;
fig. 2 is a circuit configuration diagram of a light intensity and color temperature linkage circuit for dimming an LED lamp according to the present utility model;
fig. 3 is a graph showing the luminous intensity of the light intensity and color temperature linkage circuit for the dimming LED lamp, the high color temperature LED circuit and the low color temperature LED circuit therein according to the total current.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in fig. 2, a light intensity and color temperature linkage circuit for a dimming LED lamp comprises a high color temperature LED circuit, a low color temperature LED circuit and a current distribution circuit, wherein the high color temperature LED circuit is provided with an anode and a cathode, the low color temperature LED circuit is provided with an anode and a cathode, the current distribution circuit is provided with a first output end, a second output end and a cathode, the working voltage of the high color temperature LED circuit is larger than that of the low color temperature LED circuit, the anode of the high color temperature LED circuit is connected with the anode of the low color temperature LED circuit, the connecting end is the positive input end of the light intensity linkage circuit, the cathode of the high color temperature LED circuit is connected with the first output end of the current distribution circuit, the cathode of the low color temperature LED circuit is connected with the second output end of the current distribution circuit, the cathode of the current distribution circuit is the negative input end of the light intensity linkage circuit, the current distribution circuit comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4 and an integrated circuit U1, the integrated circuit U1 is a general linear constant current chip, the output end, a regulating end and the cathode are connected with one end of the anode of the high color temperature LED circuit, one end of the first resistor R1 is the first output end of the first resistor R2 and one end of the integrated circuit is connected with the second end of the fourth resistor R1, the second resistor R3 is connected with the other end of the fourth resistor R3, and the other end of the integrated circuit is connected with the other end of the fourth resistor R3.
In this embodiment, when currents of different magnitudes are connected between the positive input terminal and the negative input terminal of the light intensity and color temperature linkage circuit for dimming the LED lamp, the light emission intensity is in direct proportion to the connected current, and the light emission color temperature and the light emission intensity are corresponding. When the current distribution circuit is connected with current, driving currents with different sizes are provided for the high-color-temperature LED circuit and the low-color-temperature LED circuit, so that the high-color-temperature LED circuit generates high-color-temperature light, the low-color-temperature LED circuit generates low-color-temperature light, the high-color-temperature light and the low-color-temperature light are mixed to form mixed light, when the ratio of the luminous intensity of the high-color-temperature light to the luminous intensity of the low-color-temperature light is different, the mixed light with different color temperatures is generated, the color temperature of the mixed light is between the color temperature of the high-color-temperature light and the color temperature of the low-color-temperature light, the higher the ratio of the luminous intensity of the high-color-temperature light to the luminous intensity of the low-color-temperature light is, and the color temperature of the mixed light is lower. When current is connected between the anode and the cathode of the high-color-temperature LED circuit, the luminous intensity of the generated high-color-temperature light is in direct proportion to the connected current. When current is connected between the anode and the cathode of the low-color-temperature LED circuit, the luminous intensity of the generated low-color-temperature light is in direct proportion to the connected current. The sum of the currents output by the first output end and the second output end of the current distribution circuit is equal to the total current flowing through the cathode of the current distribution circuit, and when currents with different magnitudes flow through the cathode of the current distribution circuit, the current magnitude ratio between the first output end and the second output end is different.
In this embodiment, by setting the resistances of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4, three current thresholds can be set for the light intensity and color temperature linkage circuit, so that when the current magnitude of the light intensity and color temperature linkage circuit connected between the positive input terminal and the negative input terminal increases from 0, the mixed light emitted by the light intensity and color temperature linkage circuit has four different brightness and color temperature change relations. The three current thresholds are sequentially referred to as a first current threshold, a second current threshold, and a third current threshold in order from small to large. When the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit is smaller than or equal to the first current threshold, the first output end and the second output end of the current distribution circuit output corresponding currents at the moment, so that the sum of the operating voltage of the low color temperature LED circuit and the voltage drop of the second resistor R2 is smaller than or equal to the operating voltage of the high color temperature LED circuit, the high color temperature LED circuit does not emit light, the low color temperature LED circuit generates low color temperature light, the light emitting intensity of the low color temperature light is in direct proportion to the current connected between the positive input end and the negative input end of the color temperature linkage circuit, and at the moment, the light generated by the light intensity and the color temperature linkage circuit is only the low color temperature light, and the color temperature of the light is the color temperature of the low color temperature light, namely the lowest color temperature. When the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit of the embodiment is greater than the first current threshold and less than or equal to the second current threshold, the first output end and the second output end of the current distribution circuit output corresponding currents at this time, so that the sum of the operating voltage of the low color temperature LED circuit and the voltage drop of the second resistor R2 is greater than or equal to the operating voltage of the high color temperature LED circuit, the high color temperature LED circuit generates high color temperature light, the low color temperature LED circuit generates low color temperature light, the light emitting intensity of the high color temperature light and the light emitting intensity of the low color temperature light are both increased along with the increase of the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit of the embodiment, but the light emitting intensity of the high color temperature light is faster than the light emitting intensity of the low color temperature light, the light intensity and the color temperature linkage circuit of the embodiment generates light which is mixed light formed by the high color temperature light and the low color temperature light, the color temperature of the mixed light is increased along with the increase of the light emitting intensity of the light, and the color temperature of the mixed light is lower than the color temperature of the low color temperature light.
When the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit of the embodiment is larger than the second current threshold and smaller than the third current threshold, the first output end and the second output end of the current distribution circuit output corresponding currents at this time, so that the sum of the operating voltage of the low color temperature LED circuit and the voltage drop of the second resistor R2 is larger than or equal to the operating voltage of the high color temperature LED circuit, the high color temperature LED circuit generates high color temperature light, the low color temperature LED circuit generates low color temperature light, however, the luminous intensity of the high color temperature light increases along with the increase of the current connected between the positive input end and the negative input end of the light intensity and the color temperature linkage circuit of the embodiment, the luminous intensity of the low color temperature light decreases along with the increase of the current connected between the positive input end and the negative input end of the light intensity and the color temperature linkage circuit of the embodiment, the luminous intensity of the high color temperature light increases, the luminous intensity of the low color temperature light decreases along with the increase of the light intensity and the color temperature linkage circuit of the embodiment, and the high color temperature light can be mixed at this time, and the high color temperature light can reach the maximum mixed color temperature of the high color temperature light. When the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit is greater than or equal to the third current threshold, the first output end and the second output end of the current distribution circuit output corresponding currents at the moment, because the voltage drop on the fourth resistor R4 is large enough to cut off the output end of the integrated circuit U1, the low-color-temperature LED light-emitting circuit does not emit light, the high-color-temperature LED circuit generates high-color-temperature light, the light intensity of the high-color-temperature light is increased along with the increase of the current connected between the positive input end and the negative input end of the light intensity and color temperature linkage circuit, and at the moment, the light generated by the light intensity and color temperature linkage circuit is only high-color-temperature light, and the color temperature of the light is the color temperature of the high-color-temperature light.
The graph of the light intensity and color temperature linkage circuit, the light intensity of the high color temperature LED circuit and the light intensity of the low color temperature LED circuit in the light intensity and color temperature linkage circuit are changed along with the total current is shown in fig. 3, the total current is the sum of the currents output by the first output end and the second output end of the current distribution circuit, I1 represents the first current threshold, I2 represents the second current threshold, I3 represents the third current threshold, the curve corresponding to the total light intensity is the curve of the light intensity and the light intensity of the color temperature linkage circuit along with the total current, the curve corresponding to the high color temperature light is the curve of the light intensity of the high color temperature LED light emitting circuit along with the total current, and the curve corresponding to the low color temperature light is the curve of the light intensity of the light emitting circuit along with the total current.
In summary, the light intensity and color temperature linkage circuit for the dimming LED lamp of the embodiment only needs to use a general linear constant current chip and four resistors, and on the basis of the performance characteristics of the general linear constant current chip, the four-section light emitting characteristic can be realized by setting the resistance values of the four resistors by using the current conventional means, so that the requirement of the dimming LED lamp for simulating the sunlight change effect can be met by using lower cost.
Embodiment two: the embodiment is basically the same as the first embodiment, except that in the embodiment, the integrated circuit U1 is implemented by using a linear constant current driving chip with a model SM 2082.
Claims (2)
1. The light intensity and color temperature linkage circuit for the dimming LED lamp comprises a high color temperature LED circuit, a low color temperature LED circuit and a current distribution circuit, wherein the high color temperature LED circuit is provided with a positive electrode and a negative electrode, the low color temperature LED circuit is provided with a positive electrode and a negative electrode, the current distribution circuit is provided with a first output end, a second output end and a negative electrode, the working voltage of the high color temperature LED circuit is larger than that of the low color temperature LED circuit, the positive electrode of the high color temperature LED circuit is connected with the positive electrode of the low color temperature LED circuit, the connection end is the positive input end of the light intensity and color temperature linkage circuit, the negative electrode of the high color temperature LED circuit is connected with the first output end of the current distribution circuit, the negative electrode of the low color temperature LED circuit is the negative input end of the light intensity and color temperature linkage circuit, the current distribution circuit is characterized in that the current distribution circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an integrated circuit, the connection end is the first output end of the integrated circuit, the second resistor is the first end of the integrated circuit is connected with the second resistor, the second end of the integrated circuit is the fourth resistor, the second end of the integrated circuit is connected with the second resistor, the second end of the fourth resistor is connected with the third resistor, the third end of the integrated circuit is connected with the fourth resistor, the fourth end of the fourth resistor is connected with the fourth resistor, and the connecting end is the negative electrode of the current distribution circuit.
2. The light intensity and color temperature linkage circuit for the dimming LED lamp according to claim 1, wherein the integrated circuit is realized by a linear constant current driving chip with a model number of SM 2082.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638487.7U CN220087517U (en) | 2023-06-26 | 2023-06-26 | Light intensity and color temperature linkage circuit for dimming LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638487.7U CN220087517U (en) | 2023-06-26 | 2023-06-26 | Light intensity and color temperature linkage circuit for dimming LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220087517U true CN220087517U (en) | 2023-11-24 |
Family
ID=88814475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321638487.7U Active CN220087517U (en) | 2023-06-26 | 2023-06-26 | Light intensity and color temperature linkage circuit for dimming LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220087517U (en) |
-
2023
- 2023-06-26 CN CN202321638487.7U patent/CN220087517U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10182486B2 (en) | LED drive circuit | |
| CN205160868U (en) | LED circuit and LED lamps and lanterns | |
| CN213991102U (en) | Constant current circuit for multi-path steering lamp | |
| CN211909244U (en) | LED drive circuit with variable color temperature | |
| CN220087517U (en) | Light intensity and color temperature linkage circuit for dimming LED lamp | |
| JP6411261B2 (en) | LED drive circuit | |
| CN207543377U (en) | A kind of Dimmable LED constant-current drive circuit | |
| CN215581810U (en) | LED soft lamp strip capable of selecting color temperature without controller | |
| CN211019370U (en) | automatic temperature control circuit of L ED lamps and lanterns | |
| CN212573026U (en) | Adapter LED brightness control improves circuit | |
| CN212628495U (en) | Dimming depth control circuit | |
| CN102695336A (en) | LED (light-emitting diode) lamp | |
| CN213462413U (en) | Dimming LED lamp circuit | |
| CN216531853U (en) | Lighting circuit and lamp comprising same | |
| CN218416718U (en) | High-power LED drive circuit and system | |
| CN217283482U (en) | Multi-path control light-emitting circuit of track lamp | |
| CN201281259Y (en) | Flexible LED lamp strip | |
| CN220307421U (en) | Circuit for adjusting brightness of marker lamp | |
| CN212992653U (en) | Linear constant-current LED lamp circuit working at wide voltage | |
| CN217011252U (en) | Automobile LED constant current driving circuit based on discrete device | |
| CN214101867U (en) | Overvoltage protection circuit | |
| CN217770424U (en) | LED drive circuit, LED drive system and LED pilot lamp | |
| CN217470327U (en) | Light emitting device | |
| CN216820160U (en) | Lamp strip drive circuit | |
| CN213959734U (en) | Short-circuit protection circuit of LED illuminating lamp and LED illuminating lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |