CN220896879U - LED color temperature controller - Google Patents
LED color temperature controller Download PDFInfo
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- CN220896879U CN220896879U CN202322481088.0U CN202322481088U CN220896879U CN 220896879 U CN220896879 U CN 220896879U CN 202322481088 U CN202322481088 U CN 202322481088U CN 220896879 U CN220896879 U CN 220896879U
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- 238000005286 illumination Methods 0.000 description 6
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Abstract
The utility model discloses an LED color temperature controller, which comprises a power supply module, a control chip, a color temperature selection unit and a switch control unit, wherein the power supply module is connected with the control chip; the power supply module is electrically connected with the control chip and the two groups of LED lamp strings by power supplies; the control chip is electrically connected with the color temperature selection unit and the switch control unit. Through setting the color temperature selection unit and the switch control unit, a user can select the gear of the pulling switch according to actual use requirements to change the level signal input to the control chip, the control chip outputs corresponding duty ratio according to the level signal, and further generates a pair of complementary PWM signals which are respectively output to the switch control unit, so that the two groups of LED lamp strings with different color temperatures are subjected to mixed light adjustment, and the LED lamp strings represent corresponding color temperatures; the color temperature is adjusted by pulling the switch, so that the utility model has the advantages of convenient adjustment and the like, and meets the lighting requirements of users in various use scenes.
Description
Technical Field
The utility model relates to the field of LED control, in particular to an LED color temperature controller.
Background
The LED is used as a novel light source, has the characteristics of energy conservation, environmental protection and high efficiency, is widely applied to various illumination fields at present, and along with the improvement of lighting quality requirements of people, intelligent illumination is a very important part in intelligent home, and compared with a traditional energy-saving lamp and an incandescent lamp, the LED illumination has high plasticity, and the brightness adjustment of the LED lamp becomes the main stream requirement of intelligent illumination due to the large popularization of the LED illumination. The existing LED lamp can realize different lighting effects through adjusting brightness, but the color temperature is less convenient to adjust or the adjusting mode is lacked, and the lighting requirements under different use scenes are difficult to meet.
Disclosure of utility model
The present utility model is directed to an LED color temperature controller, which solves one or more of the above-mentioned problems in the prior art.
To achieve the purpose, the utility model adopts the following technical scheme:
An LED color temperature controller comprises a signal acquisition unit, a color temperature selection unit and a switch control unit; the signal acquisition unit and the two groups of LED lamp strings are electrically connected with the V+ input end; the signal acquisition unit comprises a control chip, the control chip is electrically connected with the color temperature selection unit and the switch control unit, the color temperature selection unit is used for changing a level signal input to the control chip by selecting a gear of the pulling switch, the control chip is used for forming a pair of complementary PWM signals according to the level signal input by the color temperature selection unit and outputting the complementary PWM signals to the switch control unit, and the switch control unit is used for respectively controlling the on-off time of two groups of LED lamp strings.
Preferably, the switch control unit comprises a first MOS tube, a second MOS tube, a first grid pull-down resistor, a second grid pull-down resistor, a first resistor and a second resistor, wherein the source electrode of the first MOS tube is connected with the negative electrode of one group of LED lamp strings, the grid electrode of the first MOS tube is respectively connected with one end of the first resistor and one end of the first grid pull-down resistor, the other end of the first grid pull-down resistor is connected with the drain electrode of the first MOS tube, and the other end of the first resistor is connected with the sixth pin of the control chip; the source electrode of the second MOS tube is connected with the negative electrode of the other group of LED lamp strings, the grid electrode of the second MOS tube is connected with one end of the second resistor and one end of the second grid electrode pull-down resistor respectively, the other end of the second grid electrode pull-down resistor is connected with the drain electrode of the second MOS tube, and the other end of the second resistor is connected with the seventh pin of the control chip.
Preferably, the color temperature selection unit includes a pull-out switch, a first level selection resistor, a second level selection resistor, a third level selection resistor and a fourth level selection resistor, the pull-out switch has four connection ends and a common end, one end of the first level selection resistor, one end of the second level selection resistor, one end of the third level selection resistor and one end of the fourth level selection resistor are respectively connected with the four connection ends of the pull-out switch, the other end of the first level selection resistor is connected with the other end of the second level selection resistor, the other end of the third level selection resistor and the other end of the fourth level selection resistor, and the common end of the pull-out switch is connected with the third pin of the control chip.
Preferably, the two groups of LED lamp strings are respectively a cold white LED lamp string and a warm white LED lamp string.
Preferably, the LED lamp string further comprises a linear voltage stabilizing circuit and a third resistor, wherein the linear voltage stabilizing circuit is respectively connected with the V+ input end, the V-input end, one end of the third resistor and the anodes of the two groups of LED lamp strings, and the other end of the third resistor is connected with a fourth pin of the control chip.
Preferably, the circuit further comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a diode, wherein one end of the first capacitor is connected with an eighth pin of the control chip, one end of the second capacitor is connected with a fourth pin of the control chip, one end of the third capacitor and the anode of the diode are connected with a fifth pin of the control chip, one end of the fourth capacitor is connected with a third pin of the control chip, and the other end of the first capacitor is connected with the other end of the second capacitor, the other end of the third capacitor, the other end of the fourth capacitor and the cathode of the diode.
Compared with the prior art, the utility model has the beneficial effects that: through setting the color temperature selection unit and the switch control unit, a user can select the gear of the pulling switch according to actual use requirements to change the level signal input to the control chip, the control chip outputs corresponding duty ratio according to the level signal, and further generates a pair of complementary PWM signals which are respectively output to the switch control unit, so that the two groups of LED lamp strings with different color temperatures are subjected to mixed light adjustment, and the LED lamp strings represent corresponding color temperatures; the color temperature is adjusted by pulling the switch, so that the utility model has the advantages of convenient adjustment and the like, and meets the lighting requirements of users in various use scenes.
Drawings
The present utility model is further illustrated by the accompanying drawings, which are not to be construed as limiting the utility model in any way.
FIG. 1 is a schematic overall construction of one embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of one embodiment of the present utility model.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
An LED color temperature controller of the present embodiment, referring to fig. 1, includes a signal acquisition unit, a color temperature selection unit, and a switch control unit; the signal acquisition unit and the two groups of LED lamp strings are electrically connected with the V+ input end and used for providing power; the signal acquisition unit comprises a control chip, the control chip is electrically connected with the color temperature selection unit and the switch control unit, the color temperature selection unit is used for changing a level signal input to the control chip by selecting a gear of the pulling switch DP1, the control chip is used for converting the level signal input by the color temperature selection unit into a corresponding duty ratio to form a pair of complementary PWM signals and outputting the complementary PWM signals to the switch control unit, and the switch control unit is used for respectively controlling the on-off time of two groups of LED lamp strings.
Through setting the color temperature selection unit and the switch control unit, a user can select the gear of the pulling switch according to actual use requirements to change the level signal input to the control chip, the control chip outputs corresponding duty ratio according to the level signal, and further generates a pair of complementary PWM signals which are respectively output to the switch control unit, so that the two groups of LED lamp strings with different color temperatures are subjected to mixed light adjustment, and the LED lamp strings represent corresponding color temperatures; when the whole LED lamp string is required to display cold light, the time for lighting the cold white LED lamp string is long, and the time for lighting the warm light LED lamp string is short, otherwise, when the whole LED lamp string is required to display warm light, the time for lighting the cold white LED lamp string is short, and the time field for lighting the warm light LED lamp string is short. The embodiment can configure the light environment with the color temperatures of 5 grades of 2200K,3000K,4000K,5000K and 6500K to meet more illumination requirements.
Preferably, the switch control unit includes a first MOS transistor Q1, a second MOS transistor Q2, a first gate pull-down resistor Rgs1, a second gate pull-down resistor Rgs2, a first resistor R1, and a second resistor R2, where a source electrode of the first MOS transistor Q1 is connected to a negative electrode of the warm white LED light string, a gate electrode of the first MOS transistor Q1 is connected to one end of the first resistor R1 and one end of the first gate pull-down resistor Rsg1, another end of the first gate pull-down resistor Rsg1 is connected to a drain electrode of the first MOS transistor Q1, and another end of the first resistor R1 is connected to a sixth pin of the control chip U1; the source electrode of the second MOS tube Q2 is connected with the negative electrode of the cold white LED lamp string, the grid electrode of the second MOS tube Q2 is connected with one end of a second resistor R2 and one end of a second grid electrode pull-down resistor Rsg respectively, the other end of the second grid electrode pull-down resistor Rsg is connected with the drain electrode of the second MOS tube Q2, and the other end of the second resistor R2 is connected with a seventh pin of the control chip U1.
The switching time of the first MOS tube Q1 is controlled by the duty ratio output by the sixth pin of the control chip U1, so that the adjustment of the lighting time of the cold white LED lamp string is realized; the switching time of the second MOS tube Q2 is controlled through the duty ratio output by the seventh pin of the control chip U1, so that the lighting time of the warm white LED lamp string is adjusted, and the LED lamp strings with different color temperatures are mixed and adjusted through the duty ratio output by the control chip U1, so that the LED lamp strings show corresponding color temperatures.
Preferably, the color temperature selection unit includes a pull-out switch DP1, a first level selection resistor R12, a second level selection resistor R13, a third level selection resistor R14, and a fourth level selection resistor R15, where the pull-out switch DP1 has four connection terminals and a common terminal, one end of the first level selection resistor R12, one end of the second level selection resistor R13, one end of the third level selection resistor R14, and one end of the fourth level selection resistor R15 are respectively connected to the four connection terminals of the pull-out switch DP1, the other end of the first level selection resistor R12 is connected to the other end of the second level selection resistor R13, the other end of the third level selection resistor R14, and the other end of the fourth level selection resistor R15, and the common terminal of the pull-out switch DP1 is connected to the third pin of the control chip.
Preferably, the two groups of LED lamp strings are respectively a cold white LED lamp string and a warm white LED lamp string. Therefore, the on-off time of the cold white LED lamp strings and the warm white LED lamp strings with different color temperatures is controlled, so that the two groups of LED lamp strings integrally show different color temperatures, the light environment with multiple color temperatures can be configured in different scenes, and more lighting requirements are met.
Preferably, the LED lamp string further comprises a linear voltage stabilizing circuit LDO and a third resistor R3, wherein the linear voltage stabilizing circuit LDO is respectively connected with the V+ input end, the V-input end, one end of the third resistor R3 and the anodes of the two groups of LED lamp strings, and the other end of the third resistor R3 is connected with a fourth pin of the control chip U1. The V+ input end and the V-input end are connected with an external common LED constant-current or constant-voltage driver to realize power supply to the control chip U1 and the two groups of LED lamp strings.
Preferably, the LED display device further comprises a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a diode D1, wherein one end of the first capacitor C1 is connected with an eighth pin of the control chip U1, one end of the second capacitor C2 is connected with a fourth pin of the control chip U1, one end of the third capacitor C3 and the positive electrode of the diode D1 are both connected with a fifth pin of the control chip U1, one end of the fourth capacitor C4 is connected with a third pin of the control chip U1, and the other end of the first capacitor C1 is connected with the other end of the second capacitor C2, the other end of the third capacitor C3, the other end of the fourth capacitor C4 and the negative electrode of the diode D1.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (6)
1. The LED color temperature controller is characterized by comprising a signal acquisition unit, a color temperature selection unit and a switch control unit; the signal acquisition unit and the two groups of LED lamp strings are electrically connected with the V+ input end; the signal acquisition unit comprises a control chip, the control chip is electrically connected with the color temperature selection unit and the switch control unit, the color temperature selection unit is used for changing a level signal input to the control chip by selecting a gear of the pulling switch, the control chip is used for forming a pair of complementary PWM signals according to the level signal input by the color temperature selection unit and outputting the complementary PWM signals to the switch control unit, and the switch control unit is used for respectively controlling the on-off time of two groups of LED lamp strings.
2. The LED color temperature controller of claim 1, wherein the switch control unit comprises a first MOS transistor, a second MOS transistor, a first gate pull-down resistor, a second gate pull-down resistor, a first resistor and a second resistor, wherein the source electrode of the first MOS transistor is connected to the negative electrode of one group of LED strings, the gate electrode of the first MOS transistor is connected to one end of the first resistor and one end of the first gate pull-down resistor, the other end of the first gate pull-down resistor is connected to the drain electrode of the first MOS transistor, and the other end of the first resistor is connected to the sixth pin of the control chip; the source electrode of the second MOS tube is connected with the negative electrode of the other group of LED lamp strings, the grid electrode of the second MOS tube is connected with one end of the second resistor and one end of the second grid electrode pull-down resistor respectively, the other end of the second grid electrode pull-down resistor is connected with the drain electrode of the second MOS tube, and the other end of the second resistor is connected with the seventh pin of the control chip.
3. The LED color temperature controller of claim 1, wherein the color temperature selecting unit comprises a pull-out switch, a first level selecting resistor, a second level selecting resistor, a third level selecting resistor and a fourth level selecting resistor, the pull-out switch has four connection terminals and a common terminal, one end of the first level selecting resistor, one end of the second level selecting resistor, one end of the third level selecting resistor and one end of the fourth level selecting resistor are respectively connected with the four connection terminals of the pull-out switch, the other end of the first level selecting resistor is connected with the other end of the second level selecting resistor, the other end of the third level selecting resistor and the other end of the fourth level selecting resistor, and the common terminal of the pull-out switch is connected with the third pin of the control chip.
4. The LED color temperature controller of claim 1, wherein the two sets of LED strings are cool white LED strings and warm white LED strings, respectively.
5. The LED color temperature controller of claim 1, further comprising a linear voltage stabilizing circuit and a third resistor, wherein the linear voltage stabilizing circuit is connected to the v+ input terminal, the V-input terminal, one end of the third resistor, and the anodes of the two groups of LED strings, respectively, and the other end of the third resistor is connected to a fourth pin of the control chip.
6. The LED color temperature controller of claim 1, further comprising a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a diode, wherein one end of the first capacitor is connected to the eighth pin of the control chip, one end of the second capacitor is connected to the fourth pin of the control chip, one end of the third capacitor and the anode of the diode are connected to the fifth pin of the control chip, one end of the fourth capacitor is connected to the third pin of the control chip, and the other end of the first capacitor is connected to the other end of the second capacitor, the other end of the third capacitor, the other end of the fourth capacitor and the cathode of the diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322481088.0U CN220896879U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322481088.0U CN220896879U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220896879U true CN220896879U (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322481088.0U Active CN220896879U (en) | 2023-09-13 | 2023-09-13 | LED color temperature controller |
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| Country | Link |
|---|---|
| CN (1) | CN220896879U (en) |
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2023
- 2023-09-13 CN CN202322481088.0U patent/CN220896879U/en active Active
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