Color changing temperature lamp

Abstract

The present invention provides a color temperature changing lamp, which includes: a first power supply module, a color temperature control module, a high color temperature lamp bead, a low color temperature lamp bead, a first control interface, a second control interface and a power supply interface; the first power supply module receives a first analog control signal through the first control interface, and according to the target brightness of the color temperature changing lamp indicated by the first analog control signal, converts the AC power provided by the external power supply into the total working current of the color temperature changing lamp, and outputs it to the high color temperature lamp bead and the low color temperature lamp bead; the color temperature control module receives a second analog control signal through the second control interface, and according to the target color temperature of the color temperature changing lamp indicated by the second analog control signal, controls the duration of the total working current of the color temperature changing lamp flowing through the high color temperature lamp bead and the low color temperature lamp bead. The color temperature changing lamp can avoid the problem that its brightness cannot meet the lighting requirements of the environment due to the adjustment of the color temperature.

Description

Technical Field

[0001] The invention relates to a lighting technology, in particular to a color-changing temperature lamp. Background Art

[0002] Color-changing temperature lamps are generally composed of two types of lamp beads: high color temperature lamp beads and low color temperature lamp beads. They are lamps that can change their own luminous brightness and color temperature. Color-changing temperature lamps are widely used in tunnels, workshops, large warehouses, venues and other places.

[0003] Taking a tunnel as an example, due to the difference in brightness and color temperature of the light inside and outside the tunnel, the driver may not be able to see the road ahead clearly when driving through the entrance and exit of the tunnel, which may lead to driving safety hazards. By installing color temperature-changing lamps at the entrance and exit of the tunnel, the light in the tunnel can be adjusted to balance the impact of the difference in brightness and color temperature inside and outside the tunnel.

[0004] At present, when the color temperature of the color-changing temperature lamps installed in tunnels is adjusted, the brightness of the color-changing temperature lamps will also be changed, which may easily lead to the brightness of the color-changing temperature lamps being unable to meet the tunnel's lighting needs, posing a potential driving safety hazard. Summary of the invention

[0005] The present invention provides a color temperature changing lamp to solve the problem that when the color temperature of the color temperature changing lamp is adjusted, the brightness of the color temperature changing lamp is also changed.

[0006] The color temperature changing lamp provided by the present invention comprises: a first power supply module, a color temperature control module, a high color temperature lamp bead, a low color temperature lamp bead, a first control interface, a second control interface and a power supply interface;

[0007] The color temperature control module is connected to the high color temperature lamp beads, the low color temperature lamp beads, and the second control interface respectively; the first power supply module is connected to the high color temperature lamp beads, the low color temperature lamp beads, and the first control interface, and is connected to an external power supply through the power supply interface;

[0008] The first power supply module is used to receive a first analog control signal through the first control interface, and according to the target brightness of the color temperature lamp indicated by the first analog control signal, convert the AC power provided by the external power supply into the total working current of the color temperature lamp, and output it to the high color temperature lamp bead and the low color temperature lamp bead;

[0009] The color temperature control module is used to receive a second analog control signal through the second control interface, and control the duration of the total working current of the color temperature changing lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature of the color temperature changing lamp indicated by the second analog control signal.

[0010] Optionally, the color temperature-changing lamp further includes: a second power supply module, the second power supply module being connected to the first power supply module and the color temperature control module respectively;

[0011] The first power module is further used to convert the AC power provided by the external power supply into a preset voltage and output it to the second power module;

[0012] The second power supply module is used to convert the preset voltage into the working voltage of the color temperature control module and output it to the color temperature control module.

[0013] Optionally, the color temperature control module includes: a processing unit, a conversion unit, and a power supply unit; the processing unit is respectively connected to the first power module, the second power module, the conversion unit, the high color temperature lamp beads, and the low color temperature lamp beads, and the power supply unit is also connected to the second power module and the conversion unit;

[0014] The second power supply module is specifically used to provide a working voltage for the processing unit and provide an initial voltage for the power supply unit;

[0015] The power supply unit is used to convert the initial voltage into the working voltage of the conversion unit and output it to the conversion unit;

[0016] The conversion unit is used to convert the second analog control signal to obtain a digital control signal, and output it to the processing unit; the digital control signal is used to indicate the proportion of the first current value and the second current value relative to the total working current value, the first current value is the effective current value flowing through the high color temperature lamp bead, and the second current value is the effective current value flowing through the low color temperature lamp bead;

[0017] The processing unit is used to control the duration of the total working current of the color temperature variable lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the digital control signal.

[0018] Optionally, the color temperature variable lamp further includes: a color temperature calibration module; the color temperature calibration module is connected to the color temperature control module;

[0019] The color temperature calibration module is configured to output a color temperature adjustment signal to the color temperature control module when the absolute value of the difference between the actual color temperature of the color temperature variable lamp and the target color temperature of the color temperature variable lamp is greater than a first preset threshold;

[0020] The color temperature control module is also used to adjust the duration of time that the total working current of the color-changing temperature lamp flows through the high color temperature lamp beads and the low color temperature lamp beads according to the color temperature adjustment signal, so that the absolute value of the difference between the actual color temperature of the color-changing temperature lamp and the target color temperature of the color-changing temperature lamp is less than or equal to the first preset threshold.

[0021] Optionally, the color temperature variable lamp further includes: a color temperature acquisition module, the color temperature acquisition module is connected to the color temperature calibration module;

[0022] The color temperature acquisition module is used to acquire the actual color temperature of the color temperature-changing lamp and output the actual color temperature to the color temperature calibration module.

[0023] Optionally, the color temperature changing lamp further includes: a brightness calibration module; the brightness calibration module is connected to the first power supply module;

[0024] The brightness calibration module is used to output a first brightness adjustment signal to the first power module when the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness of the color-changing temperature lamp is greater than a second preset threshold;

[0025] The first power supply module is used to adjust the total operating current according to the first brightness adjustment signal so that the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness of the color-changing temperature lamp is less than or equal to the second preset threshold.

[0026] Optionally, the color temperature lamp further includes: a brightness acquisition module; the brightness acquisition module is connected to the brightness calibration module;

[0027] The brightness acquisition module is used to acquire the actual brightness of the color temperature lamp and output the actual brightness to the brightness calibration module.

[0028] Optionally, the color-changing temperature lamp further includes: a temperature adjustment module; the temperature adjustment module is connected to the first power module;

[0029] The temperature adjustment module is used to output a second brightness adjustment signal to the first power module when the temperature of the color-changing temperature lamp is greater than or equal to a third preset threshold;

[0030] The first power supply module is further used to adjust the total operating current according to the second brightness adjustment signal to reduce the temperature of the color temperature changing lamp.

[0031] Optionally, the color-changing temperature lamp further includes: a temperature acquisition module; the temperature acquisition module is connected to the temperature adjustment module;

[0032] The temperature acquisition module is used to acquire the temperature of the color-changing temperature lamp and output the temperature to the temperature adjustment module.

[0033] Optionally, the above-mentioned color-changing temperature lamp is an LED color-changing temperature lamp.

[0034] The color temperature changing lamp provided by the present invention has a color temperature control module that controls the duration of the total working current of the color temperature changing lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads under the condition that the total working current of the fixed color temperature changing lamp remains unchanged (that is, the power of the color temperature changing lamp remains unchanged), so as to change the effective current value flowing through the high color temperature lamp beads and the low color temperature lamp beads, thereby making the color temperature changing lamp present different color temperatures. At this time, the power obtained by adding the high color temperature lamp beads and the low color temperature lamp beads of the color temperature changing lamp is equal to the power of the color temperature changing lamp determined by the first power supply module based on the target brightness. Therefore, the color temperature of the color temperature changing lamp can be adjusted while ensuring that the power of the color temperature changing lamp remains unchanged, that is, the brightness remains unchanged, thereby avoiding the problem that the brightness change caused by the color temperature adjustment and the lighting brightness of the color temperature changing lamp cannot meet the brightness requirements of the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments and the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a structural schematic diagram of an existing color-changing temperature lamp;

[0037] Figure 2 A schematic diagram of a color temperature changing lamp provided by the present invention;

[0038] Figure 3 A schematic diagram of another color temperature changing lamp provided by the present invention;

[0039] Figure 4 A schematic diagram of a color temperature control module provided by the present invention;

[0040] Figure 5 A circuit diagram of another color temperature control module provided by the present invention;

[0041] Figure 6 A schematic diagram of another color temperature changing lamp provided by the present invention;

[0042] Figure 7 A schematic diagram of another color temperature changing lamp provided by the present invention;

[0043] Figure 8A schematic diagram of another color temperature changing lamp provided by the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Take the color-changing temperature lamp used in tunnels as an example. Figure 1 FIG. 1 is a schematic diagram of the structure of an existing color temperature changing lamp. Figure 1 As shown, the color temperature changing lamp includes: a color temperature changing power supply module, a high color temperature lamp bead dimming interface, a low color temperature lamp bead dimming interface, a high color temperature lamp bead and a low color temperature lamp bead.

[0046] The color temperature variable power supply module includes a constant current power supply unit 1 and a constant current power supply unit 2. The constant current power supply unit 1 is connected to the external power supply, the high color temperature lamp bead dimming interface, and the high color temperature lamp bead, respectively, and the constant current power supply unit 2 is connected to the external power supply, the low color temperature lamp bead dimming interface, and the low color temperature lamp bead, respectively. The external power supply is used to provide alternating current to the constant current power supply unit 1 and the constant current power supply unit 2. The constant current power supply unit 1 is used to convert the alternating current provided by the external power supply into the working current of the high color temperature lamp bead, and the constant current power supply unit 2 is used to convert the alternating current provided by the external power supply into the working current of the low color temperature lamp bead.

[0047] The high color temperature lamp bead dimming interface and the low color temperature lamp bead dimming interface of the above color temperature lamp are both RS485 interfaces, which are used to receive digital control signals. The control signals are used to adjust the color temperature of the color temperature lamp.

[0048] The color temperature adjustment method of the color temperature lamp is as follows:

[0049] 1. Increase the color temperature:

[0050] The constant current power supply unit 1 can receive a control signal to increase the color temperature of the high color temperature lamp beads through the high color temperature lamp bead dimming interface. The constant current power supply unit 1 can increase the current output to the high color temperature lamp beads according to the control signal to improve the color temperature of the color temperature lamp.

[0051] Alternatively, the constant current power supply unit 2 can receive a control signal to lower the color temperature of the low color temperature lamp beads through the low color temperature lamp bead dimming interface, and then the constant current power supply unit 2 can reduce the current output to the low color temperature lamp beads according to the control signal to increase the color temperature of the color temperature lamp.

[0052] Alternatively, while the current output to the high color temperature lamp beads is increased by the constant current power supply unit 1, the current output to the low color temperature lamp beads is reduced by the constant current power supply unit 2 to increase the color temperature of the color temperature variable lamp.

[0053] 2. Lower the color temperature:

[0054] The constant current power supply unit 1 can receive a control signal to lower the color temperature of the high color temperature lamp bead through the high color temperature lamp bead dimming interface. The constant current power supply unit 1 can reduce the current output to the high color temperature lamp bead according to the control signal to reduce the color temperature of the color temperature lamp.

[0055] Alternatively, the constant current power supply unit 2 can receive a control signal to increase the color temperature of the low color temperature lamp beads through the low color temperature lamp bead dimming interface, and then the constant current power supply unit 2 can increase the current output to the low color temperature lamp beads according to the control signal to reduce the color temperature of the color temperature lamp.

[0056] Alternatively, while the current output to the high color temperature lamp beads is reduced by the constant current power supply unit 1, the current output to the low color temperature lamp beads is increased by the constant current power supply unit 2 to reduce the color temperature of the color temperature variable lamp.

[0057] Note that during the above color temperature adjustment process, the voltage output by the constant current power supply unit 1 to the high color temperature lamp beads remains unchanged, and the voltage output by the constant current power supply unit 2 to the low color temperature lamp beads remains unchanged.

[0058] When the power of the color-changing temperature lamp (i.e., the product of voltage and current) remains unchanged, the brightness of the color-changing temperature lamp will also remain unchanged. However, the color temperature adjustment method of the color-changing temperature lamp described above will cause the power of the color-changing temperature lamp to change. Specifically:

[0059] Taking the constant current power supply unit 1 as an example, when the color temperature adjustment method of the above-mentioned color temperature lamp changes the current output by the constant current power supply unit 1 to the high color temperature lamp beads, since the voltage output by the constant current power supply unit 1 to the high color temperature lamp beads remains unchanged, the power output by the constant current power supply unit 1 to the high color temperature lamp beads will change, resulting in a change in the brightness of the high color temperature lamp beads, and then causing the overall brightness of the color temperature lamp to change, which may easily cause the lighting effect of the color temperature lamp to fail to meet the brightness requirements of the environment. When the color temperature lamp is installed in a tunnel, it may cause a traffic accident due to insufficient brightness.

[0060] In addition, the above-mentioned color-changing temperature power supply module is composed of two constant current power supply units, which provide working current to the high color temperature lamp beads and the low color temperature lamp beads respectively, and the commonly used constant current power supply can only support one output. Therefore, when realizing the above-mentioned existing color-changing temperature lamp, it is necessary to develop and customize it according to the rated power of the color-changing temperature lamp in which it is located, and integrate the two constant current power supply units together to form a color-changing temperature power supply module, resulting in low production efficiency and high cost of the existing color-changing temperature lamp.

[0061] Considering that the power of the color-changing temperature lamp is equal to the product of the voltage and the current, and the change in the power of the color-changing temperature lamp is proportional to the change in the brightness of the color-changing temperature lamp, the embodiment of the present application provides a color-changing temperature lamp, which can adjust the color temperature of the color-changing temperature lamp while ensuring that the power of the color-changing temperature lamp remains unchanged, that is, the brightness remains unchanged, thereby avoiding the problem that the brightness of the color-changing temperature lamp cannot meet the brightness requirements of the environment due to the brightness change caused by the color temperature adjustment. It should be understood that the color-changing temperature lamp provided by the present invention can be applied to any place where a color-changing temperature lamp needs to be installed, such as tunnels, warehouses, workshops, etc.

[0062] Exemplarily, the color temperature changing lamp provided by the present invention may be a light emitting diode (LED) color temperature changing lamp, or may be other color temperature changing lamps that achieve color temperature adjustment through high color temperature lamp beads and low color temperature lamp beads, without limitation thereto.

[0063] It should be understood that the high color temperature lamp beads mentioned above can be, for example, white light lamp beads, and the low color temperature lamp beads mentioned above can be yellow light lamp beads. Of course, the high color temperature lamp beads and low color temperature lamp beads involved in the embodiments of the present application can also be other colors. In addition, the embodiments of the present application do not limit the number of high color temperature lamp beads and low color temperature lamp beads.

[0064] The technical solution of the present invention is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0065] Figure 2 Schematic diagram of a color temperature changing lamp provided by the present invention. Figure 2 As shown, the color temperature changing lamp may include: a first power supply module, a color temperature control module, high color temperature lamp beads, low color temperature lamp beads, a first control interface, a second control interface and a power supply interface.

[0066] Among them, the color temperature control module is respectively connected to the first power supply module, high color temperature lamp beads, low color temperature lamp beads, and the second control interface; the first power supply module is connected to the high color temperature lamp beads, the low color temperature lamp beads, and the first control interface, and is connected to the external power supply through the power supply interface.

[0067] The power interface can transmit the alternating current output by the external power supply to the first power module. The external power supply can be any power supply that can provide alternating current (AC), such as a mains or an uninterruptible power supply (UPS). The voltage of the alternating current involved here can be 220V, 110V, etc., which is not limited.

[0068] The first power module can receive the first analog control signal through the first control interface. That is, the first control interface is used to receive the first analog control signal and output it to the first power module. Exemplarily, the control device can be connected to the color-changing temperature lamp through the first control interface, and the user can send the first analog control signal to the color-changing temperature lamp through the control device. Alternatively, one end of the control device is connected to the host computer, and the other end is connected to the color-changing temperature lamp through the first control interface. The user can use the host computer to send the first analog control signal to the color-changing temperature lamp through the control device.

[0069] The first analog control signal can indicate the target brightness of the color temperature lamp. Taking a 0-10V analog voltage signal as the first analog control signal as an example, different values ​​of the first analog voltage signal can correspond to different target brightnesses, such as shown in the following Table 1:

[0070] Table 1

[0071]

[0072]

[0073] In the above table, lm is the abbreviation of Luminou, which means the unit of brightness, and its Chinese name is lumen.

[0074] Alternatively, different value ranges of the first analog voltage signal correspond to different target brightnesses, as shown in the following Table 2:

[0075] Table 2

[0076] Serial number Voltage range(V) Target brightness (lm) 1 [0,3) 2400 2 [3,6) 3000 3 [6,8) 3600 4 [8,10] 4200

[0077] It should be noted that the present invention does not limit the value range of the voltage corresponding to the first analog control signal, and can also be other value ranges, such as between 5V and 30V, etc., which can be specifically determined according to the voltage value range of the first analog control signal that can be sent by the control device. In addition, the first analog control signal can also be implemented by other analog signals, such as analog current signals, analog pressure signals, etc.

[0078] In addition, although the above examples use voltage values ​​in integer form as an example to illustrate the corresponding relationship between the voltage value and the target brightness, it should be understood that the above voltage value can also be any real number between 0-10V.

[0079] The first power module can convert the AC power provided by the external power supply into the total operating current of the color-changing temperature lamp according to the target brightness of the color-changing temperature lamp indicated by the first analog control signal, and output it to the high color temperature lamp beads and the low color temperature lamp beads. It should be understood that the total operating current of the color-changing temperature lamp mentioned here can be the current of the DC power.

[0080] As mentioned above, the brightness of the color-changing temperature lamp is related to the power of the color-changing temperature lamp. Therefore, the first power module can obtain the power of the color-changing temperature lamp based on the target brightness of the color-changing temperature lamp. Then, the first power module can obtain the total operating current of the color-changing temperature lamp based on the power and the preset output voltage (which can be set by the user or the rated output voltage of the first power module, etc.). Finally, the first power module can convert the AC power provided by the external power supply into the total operating current of the color-changing temperature lamp, and output it to the high color temperature lamp beads and the low color temperature lamp beads.

[0081] Taking the target brightness of the color-changing temperature lamp as 3000lm as an example, assuming that the luminous efficiency of the color-changing temperature lamp is 100 lumens / watt (Watt, W), the corresponding power of the color-changing temperature lamp is 30W. Assuming that the output voltage of the first power module is 10V, the total operating current of the color-changing temperature lamp is 3A. At this time, the first power module can convert the AC power provided by the external power supply into a current of 3A and output it to the high color temperature lamp beads and the low color temperature lamp beads.

[0082] It should be understood that the above-mentioned first power supply module only needs to output one current as the total working current of the high color temperature lamp beads and the low color temperature lamp beads. Therefore, the above-mentioned first power supply module can adopt any existing constant current power supply that can meet the rated power of the color-changing temperature lamp. No special customization is required, which improves the production efficiency of the color-changing temperature lamp and reduces the production cost.

[0083] The color temperature control module can receive the second analog control signal through the second control interface. That is, the second control interface is used to receive the second analog control signal and output it to the color temperature control module. Exemplarily, the control device can be connected to the color temperature lamp through the second control interface, and the user can send the second analog control signal to the color temperature lamp through the control device. Alternatively, one end of the control device is connected to the host computer, and the other end is connected to the color temperature lamp through the second control interface. The user can use the host computer to send the second analog control signal to the color temperature lamp through the control device. It should be understood that the control device mentioned here and the control device that sends the first analog control signal can be the same control device or different control devices, which can be set according to the needs of the user. Correspondingly, the host computer mentioned here and the host computer that sends the first analog control signal can be the same host computer or different host computers, which can be set according to the needs of the user.

[0084] The second analog control signal can indicate the target color temperature of the color temperature variable lamp. Taking a 0-10V analog voltage signal as an example of the second analog control signal, different values ​​of the second analog voltage signal can correspond to different target color temperatures, such as shown in the following Table 3:

[0085] Table 3

[0086] Serial number Voltage value (V) Target color temperature (K) 1 10 3000 2 8 3500 3 7 4000 4 6 4500 …… …… …… N 0 6500

[0087] Among them, K is the abbreviation of Kelvins, which is the unit of color temperature and its Chinese name is Kelvin.

[0088] Alternatively, different value ranges of the second analog voltage signal correspond to different target color temperatures, as shown in the following Table 4:

[0089] Table 4

[0090] Serial number Voltage range(V) Target color temperature (K) 1 [8.75,10.00] 3000 2 [7.50,8.75) 3500 3 [6.25,7.50) 4000 4 [5.00,6.25) 4500 5 [3.75,5.00) 5000 6 [2.50,3.75) 5500 7 [1.25,2.50) 6000 8 [0,1.25) 6500

[0091] It should be noted that the present invention does not limit the value range of the voltage corresponding to the second analog control signal, and can also be other value ranges, such as between 5V and 30V, etc., which can be specifically determined according to the voltage value range of the second analog control signal that can be sent by the control device. In addition, the second analog control signal can also be implemented by other analog signals, such as analog current signals, analog pressure signals, etc.

[0092] In addition, although the examples in Table 3 above use voltage values ​​in the form of integers as an example to illustrate the corresponding relationship between the voltage values ​​and the target color temperature, it should be understood that the voltage values ​​in Table 3 above can also be any real number between 0-10V. Correspondingly, the voltage values ​​in Table 4 above can also be integers between 0-10V, etc., which will not be repeated here.

[0093] The color temperature control module can control the duration of the total operating current of the color temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature of the color temperature lamp indicated by the second analog control signal. For example, the color temperature control module can control the duration of the total operating current of the color temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads by controlling the conduction duration of the path between the first power module and the high color temperature lamp beads and the low color temperature lamp beads.

[0094] Taking high color temperature lamp beads as an example, when the total working current of the color-changing lamp flows through the high color temperature lamp beads for a longer time, the effective current value flowing through the high color temperature lamp beads is larger, and accordingly, the brightness of the high color temperature lamp beads is higher. When the total working current of the color-changing lamp flows through the high color temperature lamp beads for a shorter time, the effective current value flowing through the high color temperature lamp beads is smaller, and accordingly, the brightness of the high color temperature lamp beads is lower. Low color temperature lamp beads have similar principles, which will not be elaborated on.

[0095] Therefore, when at least one of the duration that the total working current of the color-changing temperature lamp flows through the high color temperature lamp bead and the duration that it flows through the low color temperature lamp bead changes, the effective current value flowing through the lamp bead will also change, thereby changing the color temperature of the color-changing temperature lamp.

[0096] Taking the first current value as the effective current value flowing through the high color temperature lamp bead and the second current value as the effective current value flowing through the low color temperature lamp bead as an example, optionally, the first current and the second current corresponding to different target color temperatures have different proportions relative to the total working current. The proportion mentioned here can also be understood as: the current ratio between the first current and the second current, such as shown in the following Table 5:

[0097] Table 5

[0098] Serial number Color temperature (K) First current: Second current 1 3000 0：1 2 3500 1：5 3 4000 1：2 4 4500 1：1 5 5000 5：2 6 5500 5：1 7 6000 10：1 8 6500 1：0

[0099] Alternatively, in the case of different total currents, different target color temperatures may correspond to the magnitudes of the first current and the second current. For example, the total operating current of the color temperature variable lamp is 1000 mA. For the total operating current, the magnitudes of the first current and the second current corresponding to different target color temperatures are shown in the following Table 6:

[0100] Table 6

[0101]

[0102]

[0103] It should be understood that the above only provides some examples of the corresponding relationship between different color temperatures and the first current and the second current, and the present invention is not limited thereto, and other mapping relationships that can ultimately determine the first current and the second current may also be used.

[0104] Therefore, the color temperature control module can determine the first current value and the second current value according to the target color temperature, so that based on the first current value and the second current value, it can control the duration that the total working current of the color temperature variable lamp flows through the high color temperature lamp beads and the low color temperature lamp beads.

[0105] Taking the target color temperature of the color-changing lamp as 5000K and the total operating current of the color-changing lamp as 3000mA as an example, assuming that the first current obtained based on the target color temperature and the total operating current is 2142mA and the second current is 858mA, the color temperature control module can control the length of time that the total operating current of the color-changing lamp flows through the high color temperature lamp beads and the low color temperature lamp beads, so as to output direct current with a current of 2142mA and a voltage of 10V to the high color temperature lamp beads, and output direct current with a current of 858mA and a voltage of 10V to the low color temperature lamp beads.

[0106] From this embodiment, it can be seen that the output power determined by the first power module is 3A10V=30W. When the target color temperature is 5000K, the power of the high color temperature lamp bead is 2.142A×10V=21.42W, and the power of the low color temperature lamp bead is 0.858A×10V=8.58W. The power of the high color temperature lamp bead plus the power of the low color temperature lamp bead is equal to 30W, which is equal to the output power determined by the first power module. When the target color temperature is 4000K, the current on the high color temperature lamp bead is 999mA, and the current on the low color temperature lamp bead is 2001mA. At this time, the power of the high color temperature lamp bead and the low color temperature lamp bead are 9.99W and 20.01W respectively, and the sum of the two is still equal to 30W.

[0107] Optionally, in another implementation, different target color temperatures can correspond to the ratio of "the length of time that the total operating current of the color-changing temperature lamp flows through the high color temperature lamp beads and the length of time that it flows through the low color temperature lamp beads" (also referred to as the proportion), etc., so that the color temperature control module can control the length of time that the total operating current of the color-changing temperature lamp flows through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature. This will not be elaborated here.

[0108] In the above implementation, since the color temperature control module controls the duration of the total working current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads under the condition that the total working current of the fixed color-changing temperature lamp remains unchanged (that is, the power of the color-changing temperature lamp remains unchanged), so as to change the effective current value flowing through the high color temperature lamp beads and the low color temperature lamp beads, so that the color-changing temperature lamp presents different color temperatures. At this time, the power obtained by adding the high color temperature lamp beads and the low color temperature lamp beads of the color-changing temperature lamp is equal to the power of the color-changing temperature lamp determined by the first power supply module based on the target brightness. Therefore, the color temperature of the color-changing temperature lamp can be adjusted while ensuring that the power of the color-changing temperature lamp remains unchanged, that is, the brightness remains unchanged, thereby avoiding the problem that the brightness change caused by the color temperature adjustment and the lighting brightness of the color-changing temperature lamp cannot meet the brightness requirements of the environment.

[0109] Taking the application of the color-changing temperature lamp in a tunnel as an example, in order to adapt to the brightness and color temperature outside the tunnel, the brightness and color temperature of the color-changing temperature lamp in the tunnel need to be adjusted. The control device sets the target brightness and target color temperature of the color-changing temperature lamp in the tunnel according to the brightness and color temperature outside the tunnel, and sends the target brightness to the first power module through the first control interface, and sends the target color temperature to the color temperature control module through the second control interface. The first power module adjusts the output current as the total working current of the color-changing temperature lamp according to the target brightness, and outputs it to the high color temperature lamp beads and the low color temperature lamp beads. The color temperature control module controls the duration of the total working current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature, so that the color-changing temperature lamp can present the desired color temperature.

[0110] At this time, the power obtained by adding the high color temperature lamp beads and the low color temperature lamp beads of the color temperature lamp is equal to the power of the color temperature lamp determined by the first power module based on the target brightness. Therefore, the color temperature of the color temperature lamp can be adjusted while ensuring that the power of the color temperature lamp remains unchanged, that is, the brightness remains unchanged, thereby avoiding the problem that the brightness change caused by the color temperature adjustment and the lighting brightness of the color temperature lamp cannot meet the brightness requirements of the tunnel.

[0111] In addition, since the color-changing temperature lamp provided by the present invention can be controlled by the first analog control signal and the second analog control signal. Therefore, when the color-changing temperature lamp provided by the present invention is applied in a special environment such as a tunnel, the control device can be connected to multiple color-changing temperature lamps in the tunnel to control the brightness of the multiple color-changing temperature lamps through a first analog control signal, thereby improving the control efficiency. In addition, compared with the color-changing temperature lamp in the prior art that needs to be controlled by a digital control signal, the color-changing temperature lamp in the present invention is controlled by an analog control signal, that is, it is controlled by a device that can send an analog control signal. Since the cost of the device that sends the analog control signal is lower than the cost of the device that sends the digital control signal, the cost of controlling the color-changing temperature lamp can be reduced.

[0112] The operating voltage required by the color temperature control module itself can be achieved, for example, by any of the following methods:

[0113] The first method: the color temperature variable lamp may also be provided with a power supply module for providing a working voltage to the color temperature control module.

[0114] For example, Figure 3 Schematic diagram of another color temperature changing lamp provided by the present invention. Figure 3 As shown, further, based on the above embodiment, the above color temperature changing lamp may also include: a second power supply module.

[0115] Wherein, the second power supply module is connected to the first power supply module and the color temperature control module respectively.

[0116] Specifically, in addition to converting the AC power provided by the external power supply into the total working current of the color temperature lamp, the first power supply module is also used to convert the AC power provided by the external power supply into a preset voltage and output it to the second power supply module. For example, the preset voltage can be the preset output voltage of the first power supply module mentioned above, that is, the total working current of the color temperature lamp output by the first power supply module is provided to the lamp beads through the color temperature control module in one way and provided to the second power supply module in the other way.

[0117] The second power supply module converts the preset voltage into an operating voltage of the color temperature control module, and outputs the voltage to the color temperature control module, so that the color temperature control module can work normally.

[0118] Optionally, in another implementation, the second power supply module can also be connected to an external power supply at one end and to a color temperature control module at the other end, and the second power supply module is used to convert the AC power provided by the external power supply into an operating voltage of the color temperature control module and output it to the color temperature control module.

[0119] The second method: the color temperature control module itself is directly connected to the external power supply to convert the AC power provided by the external power supply into the working voltage of the color temperature control module to power itself.

[0120] It should be understood that other methods may also be used to provide the working voltage to the color temperature control module, which is not limited in this embodiment.

[0121] As mentioned above, the color temperature control module is used to receive the second analog control signal, and can control the duration of the total working current of the color temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature of the color temperature lamp indicated by the second analog control signal. It can be seen from the description of this part that the color temperature control module involved in the present invention can be any module that has the function of receiving an analog control signal and performing processing and output based on the analog control signal.

[0122] As a possible implementation, Figure 4 Schematic diagram of a color temperature control module provided by the present invention. Figure 4 As shown, the color temperature control module of the color temperature variable lamp proposed in the present application may include: a processing unit, a conversion unit, and a power supply unit.

[0123] Among them, the processing unit is respectively connected to the first power module, the second power module, the conversion unit, the high color temperature lamp beads and the low color temperature lamp beads, and the power supply unit is also connected to the second power module and the conversion unit.

[0124] On the basis of the above-mentioned embodiment, the second power supply module is specifically used to provide a working voltage for the processing unit, and can also be used to provide an initial voltage to the power supply unit, so that the power supply unit provides a working voltage for the conversion unit based on the initial voltage. The initial voltage mentioned here can be, for example, the same voltage as the working voltage of the processing unit. That is, the voltage output by the second power supply module is provided to the processing unit in one way and to the power supply unit in another way. Of course, the second power supply module can also output two voltages with different values, one for the processing unit and the other for the power supply unit, and this is not limited.

[0125] It should be understood that the existence of the power supply unit is because the working voltage required in the conversion unit is different from the working voltage of the processing unit. When the working voltage required in the conversion unit is the same as the working voltage of the processing unit, the power supply unit may not be provided. That is, whether there is a power supply unit in the color temperature control module is related to the working voltage of the conversion unit and the working voltage of the processing unit.

[0126] After receiving the working voltage, the conversion unit can convert the second analog control signal to obtain a digital control signal. The digital control signal is used to indicate the proportion of the first current value and the second current value relative to the total working current value, or in other words, the digital control signal is used to indicate the current ratio between the first current value and the second current value, or in other words, the digital control signal is used to indicate the magnitude of the first current value and the magnitude of the second current value.

[0127] After receiving the digital control signal, the processing unit can control the duration of the total working current of the color temperature variable lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the digital control signal.

[0128] For example, Figure 5 This is a circuit diagram of another color temperature control module provided by the present invention. Figure 5 As shown, WWLEDS represents high color temperature lamp beads, CWLEDS represents low color temperature lamp beads, and the first power supply module is connected to one end of the high color temperature lamp beads and the low color temperature lamp beads to provide a total operating current for the high color temperature lamp beads and the low color temperature lamp beads.

[0129] In this example, the processing unit includes a single chip microcomputer U1, a capacitor C6, a capacitor C1, a resistor R11, a resistor R1, a resistor R2, a metal-oxide-semiconductor (MOS) transistor Q1, a MOS transistor Q2, and a diode D5.

[0130] The power supply unit may include: a single chip microcomputer U4, a capacitor C9, and a capacitor C10.

[0131] The above-mentioned conversion unit may include: a single chip microcomputer U5, a capacitor C11, a resistor R8, and a resistor R9.

[0132] The second power supply module may include: a single chip computer U2, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R3, a resistor R4, a resistor R5, an inductor L1, a diode D1, and a diode D2.

[0133] The second control interface includes a resistor R10, a resistor R6, a resistor R7, a capacitor C8, and a diode D4.

[0134] It should be understood that the single-chip microcomputer in the above example can also be replaced by other devices with processing functions, such as: microcontroller unit (MCU), or digital signal processing (DSP), etc. The MOS tube in the above example can also be other switch tubes that can control the conduction time, such as triode, insulated gate bipolar transistor (IGBT), etc., which is not limited.

[0135] In addition, the number and connection relationship of the resistors, capacitors, diodes, inductors, etc. involved in the above-mentioned parts (such as units or modules) can also be adjusted according to actual needs, and there is no limitation on this.

[0136] by Figure 5 Taking the structure shown as an example, the first power module and the second power module are connected, specifically, the first power module is connected to the 5th pin of the single-chip computer U2, and the preset voltage is input to the second power module. The second power module converts the preset voltage into the working voltage of the color temperature control module and outputs it from one end of the inductor L1. The output voltage is output to the low-voltage power supply terminal 7th pin of the single-chip computer U1 of the processing unit through the resistor R11, providing the working voltage for the processing unit, and is connected to the 1st pin of the power supply unit to provide the initial voltage for the power supply unit.

[0137] One end of the processing unit's resistor R1 and resistor R2 connected in series is connected to the first power supply module, and the other end is connected to the high-voltage power supply terminal 1 of the microcontroller U1. The resistor R1 and the resistor R2 are used to divide the preset voltage output by the first power supply module to power the high-voltage power supply terminal of the microcontroller U1.

[0138] The single chip microcomputer U4 of the power supply unit converts the initial voltage provided by the second power supply module into the working voltage of the conversion unit, and outputs it to the pin 2 of the conversion unit through the pin 5.

[0139] Reference Figure 5 Taking the 0-10V analog voltage interface as an example, this article explains how the color temperature control module controls the total working current of the color temperature lamp to flow through the high color temperature lamp beads and the low color temperature lamp beads:

[0140] Exemplarily, the second control interface receives the second analog control signal through the 0-10V port, and outputs the received second analog control signal from the Detection port to the PB1 pin of the conversion unit (i.e., U5). The conversion unit converts the second analog control signal into a digital control signal PWM, and outputs it from the PB0 pin of the conversion unit to the PWM pin of the processing unit U1. Based on the PWM, the processing unit U1 controls the conduction duration of the MOS tube Q1 through pin 4, and controls the conduction duration of the MOS tube Q2 through pin 3, so as to control the duration of the total working current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads.

[0141] For example, assuming that the total working current of the color-changing temperature lamp is 1A, the working frequency of the MOS tube is 1000Hz, the first current and the second current obtained based on the target color temperature account for 70% and 30% of the total working current of the color-changing temperature lamp respectively, and the proportion of the conduction time of the MOS tube Q1 in the unit time is equal to the proportion of the first current in the total working current of the color-changing temperature lamp. Therefore, the processing unit can control the conduction time of the MOS tube Q1 to be 0.7ms within 1ms, and control the conduction time of the MOS tube Q2 to be 0.3ms within the unit time. In this way, the effective current passing through the high color temperature lamp bead in the unit time is 700mA, that is, the magnitude of the first current is 700mA, and the effective current passing through the low color temperature lamp bead in the unit time is 300mA, that is, the magnitude of the second current is 300mA, so that the color-changing temperature lamp can reach the target color temperature while maintaining the brightness unchanged.

[0142] Figure 6 Schematic diagram of another color temperature changing lamp provided by the present invention. Figure 6 As shown, the color temperature variable lamp may further include: a color temperature calibration module, wherein the color temperature calibration module is connected to the color temperature control module.

[0143] The color temperature calibration module can compare the actual color temperature of the color temperature changing lamp with the target color temperature to determine whether the color temperature of the color temperature changing lamp needs to be calibrated. When the absolute value of the difference between the actual color temperature of the color temperature changing lamp and the target color temperature is less than or equal to the first preset threshold, it means that the difference between the actual color temperature and the target color temperature is within the allowable range, and the color temperature calibration module may not perform any processing, that is, the color temperature calibration module may not output a signal for color temperature adjustment to the color temperature control module. When the absolute value is greater than the first preset threshold, it means that the deviation between the actual color temperature and the target color temperature is too large, and the color temperature calibration module needs to output a color temperature adjustment signal to the color temperature control module based on the deviation. It should be understood that the above-mentioned first preset threshold can be set according to actual usage requirements.

[0144] The color temperature control module adjusts the duration of the total operating current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the color temperature adjustment signal, so that the absolute value of the difference between the actual color temperature of the color-changing temperature lamp and the target color temperature of the color-changing temperature lamp is less than or equal to the first preset threshold. Optionally, when the color temperature control module adjusts the duration of the total operating current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads, the adjustment step size can be determined by the size of the above absolute value and the color temperature adjustment range of the color-changing temperature lamp.

[0145] For example, if the target color temperature of the color-changing temperature lamp is 4000K, the actual color temperature is 4500K, and the first preset threshold is 200K, the absolute value of the difference between the actual color temperature of the color-changing temperature lamp and the target color temperature is 500K, which is greater than 200K, and the color temperature calibration module sends a color temperature adjustment signal to the color temperature control module. For example, as described in Table 5, the first current and the second current corresponding to the target color temperature of 4000K account for 1 / 3 and 2 / 3 of the total working current of the color-changing temperature lamp, respectively. The color temperature control module adjusts the duration of the total working current of the color-changing temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the color temperature adjustment signal, so as to reduce the proportion of the first current to 1 / 6 and increase the proportion of the second current to 5 / 6.

[0146] It should be understood that the present embodiment does not limit the manner in which the color temperature calibration module obtains the actual color temperature of the color temperature-changing lamp, and for example, it may be any of the following manners:

[0147] Method 1: A color temperature acquisition module is added to the color temperature variable lamp, and the color temperature calibration module is connected to the color temperature acquisition module. The color temperature acquisition module is used to acquire the actual color temperature of the color temperature variable lamp and output it to the color temperature calibration module.

[0148] Method 2: The color temperature calibration module of the color temperature changing lamp can be connected to a color temperature acquisition module independent of the color temperature changing lamp. After the external color temperature acquisition module acquires the actual color temperature of the color temperature changing lamp, it outputs it to the color temperature calibration module.

[0149] It should be understood that the color temperature acquisition module mentioned above can be, for example, any sensor with a color temperature acquisition function, and this is not limited.

[0150] In this embodiment, by adding a color temperature calibration module to the color temperature variable lamp, the color temperature of the color temperature variable lamp is calibrated, so that the color temperature display of the color temperature variable lamp is more accurate.

[0151] Figure 7 Schematic diagram of another color temperature changing lamp provided by the present invention. Figure 7 As shown, the color temperature changing lamp may further include: a brightness calibration module, wherein the brightness calibration module is connected to the first power supply module.

[0152] The brightness calibration module can compare the actual brightness of the color-changing temperature lamp with the target brightness to determine whether the brightness of the color-changing temperature lamp needs to be calibrated. When the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness is less than or equal to the second preset threshold, it means that the difference between the actual brightness and the target brightness is within the allowable range, and the brightness calibration module may not perform any processing, that is, the brightness calibration module may not output a signal to the first power module for further brightness adjustment. When the absolute value is greater than the second preset threshold, it means that the deviation between the actual brightness and the target brightness is too large, and the brightness calibration module needs to output a first brightness adjustment signal to the first power module based on the deviation. It should be understood that the above-mentioned second preset threshold can be set according to actual usage requirements.

[0153] The first power module adjusts the total operating current of the output color-changing temperature lamp according to the first brightness adjustment signal, so that the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness of the color-changing temperature lamp is less than or equal to the second preset threshold. Optionally, when the first power module adjusts the total operating current of the color-changing temperature lamp, the adjustment step size can be determined by the size of the above absolute value and the brightness adjustment range of the color-changing temperature lamp.

[0154] For example, if the target brightness of the color temperature lamp is 3000lm, the actual brightness is 2400lm, and the second preset threshold is 300lm, the absolute value of the difference between the actual brightness of the color temperature lamp and the target brightness is 600lm, which is greater than 300lm, and the brightness calibration module sends a first brightness adjustment signal to the first power module. For example, when the actual brightness of the color temperature lamp is 2400lm, the output current of the first power module is 3A, and the first power module adjusts the output current according to the first brightness adjustment signal, which can be adjusted to 4A, and then outputs the adjusted output current as the total working current of the color temperature lamp to the color temperature control module.

[0155] It should be understood that the present embodiment does not limit the manner in which the brightness calibration module obtains the actual brightness of the color temperature lamp, and for example, it may be any of the following manners:

[0156] Method 1: A brightness acquisition module is added to the color temperature changing lamp, and the brightness calibration module is connected to the brightness acquisition module. The brightness acquisition module is used to acquire the actual brightness of the color temperature changing lamp and output it to the brightness calibration module.

[0157] Method 2: The brightness calibration module of the color-changing temperature lamp can be connected to a brightness acquisition module independent of the color-changing temperature lamp. After the external brightness acquisition module acquires the actual brightness of the color-changing temperature lamp, it outputs it to the brightness calibration module.

[0158] It should be understood that the brightness acquisition module mentioned above can be, for example, any sensor with a brightness acquisition function, and this is not limited.

[0159] In this embodiment, by adding a brightness calibration module to the color-changing temperature lamp, the brightness of the color-changing temperature lamp is calibrated, so that the brightness display of the color-changing temperature lamp is more accurate.

[0160] Figure 8 Schematic diagram of another color temperature changing lamp provided by the present invention. Figure 8 As shown, the color-changing temperature lamp may further include: a temperature adjustment module, wherein the temperature adjustment module is connected to the first power supply module.

[0161] The temperature adjustment module can compare the temperature of the color-changing temperature lamp with the third preset threshold to determine whether the temperature of the color-changing temperature lamp needs to be controlled. If the temperature of the color-changing temperature lamp is less than the third preset threshold, it means that the temperature of the lamp beads of the color-changing temperature lamp is normal, and the temperature adjustment module does not need to do anything. When the temperature of the color-changing temperature lamp is greater than or equal to the third preset threshold, it means that the operating temperature of the color-changing temperature lamp is too high and the lamp beads of the color-changing temperature lamp are easily burned. At this time, the temperature adjustment module outputs a second brightness adjustment signal to the first power supply module to reduce the brightness of the color-changing temperature lamp, thereby reducing the temperature of the color-changing temperature lamp, so as to extend the service life of the color-changing temperature lamp and enhance the safety of the use of the color-changing temperature lamp. It should be understood that the above-mentioned third preset threshold can be set according to actual usage requirements.

[0162] When the brightness of the color-changing temperature lamp is higher, the working current of the color-changing temperature lamp is also higher, that is, the greater the power of the color-changing temperature lamp is, the easier it is to cause the temperature of the color-changing temperature lamp to be too high, so the first power module adjusts the output current according to the second brightness adjustment signal, that is, adjusts the total working current of the color-changing temperature lamp to reduce the temperature of the color-changing temperature lamp. Optionally, when the first power module adjusts the total working current of the color-changing temperature lamp, the adjustment step can be determined by the absolute value of the difference between the temperature of the color-changing temperature lamp and the third preset threshold value. The larger the absolute value, the larger the adjustment step. This application does not further limit the adjustment process.

[0163] For example, if the temperature of the color temperature lamp received by the temperature adjustment module is 60 degrees, compared with the third preset threshold of 50 degrees, the operating temperature of the color temperature lamp is too high. Then the temperature adjustment module sends a second brightness adjustment signal to the first power module. If the output current of the first power module is 4A at this time, according to the second brightness adjustment signal, the first power module adjusts the output current to 3A and outputs it to the color temperature control module.

[0164] Optionally, the temperature adjustment module obtains the operating temperature of the color-changing temperature lamp once at a fixed time and compares it with a third preset threshold. In order to be able to monitor the operating temperature of the color-changing temperature lamp in a timely manner, the fixed time can be a shorter time such as one minute or two minutes. This application does not limit the frequency of temperature acquisition.

[0165] It should be understood that this embodiment does not limit the manner in which the temperature adjustment module obtains the temperature of the color-changing temperature lamp, and for example, it may be any of the following manners:

[0166] Method 1: A temperature acquisition module is added to the color-changing temperature lamp, and the temperature adjustment module is connected to the temperature acquisition module. The temperature acquisition module is used to collect the temperature of the color-changing temperature lamp and output it to the temperature adjustment module.

[0167] Method 2: The temperature adjustment module of the color-changing temperature lamp can be connected to a temperature acquisition module independent of the color-changing temperature lamp. After the external temperature acquisition module acquires the actual brightness of the color-changing temperature lamp, it outputs it to the temperature adjustment module.

[0168] It should be understood that the temperature acquisition module mentioned above can be, for example, any sensor with a temperature acquisition function, and this is not limited.

[0169] Optionally, if the first power module receives the first brightness adjustment signal and the second brightness adjustment signal at the same time, the first power module can give priority to processing the second brightness adjustment signal, and after the operating temperature of the color-changing temperature lamp is normal, adjust the brightness of the color-changing temperature lamp based on the first brightness adjustment signal to extend the service life of the color-changing temperature lamp.

[0170] In this embodiment, by adding a temperature adjustment module to the color-changing temperature lamp, protection of the working components of the color-changing temperature lamp is achieved, preventing the color-changing temperature lamp from working at high temperature for a long time, thereby extending the service life of the color-changing temperature lamp.

[0171] It should be noted that, although the above examples respectively take the color temperature lamp including: color temperature calibration module, temperature adjustment module, brightness calibration module as examples, the color temperature lamp is illustrated and described. However, those skilled in the art can understand that the above color temperature lamp can also have two or three of the above functions at the same time. For example, the color temperature lamp can have a color temperature calibration module, a temperature adjustment module, and a brightness calibration module at the same time to calibrate the color temperature and brightness and adjust the temperature, and the present invention is not limited to this.

Claims

1. A color-changing temperature lamp, characterized in that: The color temperature changing lamp comprises: a first power supply module, a color temperature control module, high color temperature lamp beads, low color temperature lamp beads, a first control interface, a second control interface and a power supply interface; The color temperature control module is connected to the high color temperature lamp beads, the low color temperature lamp beads, and the second control interface respectively; the first power supply module is connected to the high color temperature lamp beads, the low color temperature lamp beads, and the first control interface, and is connected to an external power supply through the power supply interface; The first power supply module is used to receive a first analog control signal through the first control interface, and according to the target brightness of the color temperature lamp indicated by the first analog control signal, convert the AC power provided by the external power supply into the total working current of the color temperature lamp, and output it to the high color temperature lamp bead and the low color temperature lamp bead; The color temperature control module is used to receive the second analog control signal through the second control interface, and control the duration of the total working current of the color temperature lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the target color temperature of the color temperature lamp indicated by the second analog control signal; The color temperature changing lamp further comprises: a second power supply module, the second power supply module being connected to the first power supply module and the color temperature control module respectively; The first power module is further used to convert the AC power provided by the external power supply into a preset voltage and output it to the second power module; The second power supply module is used to convert the preset voltage into the working voltage of the color temperature control module and output it to the color temperature control module; The color temperature control module includes: a processing unit, a conversion unit, and a power supply unit; the processing unit is respectively connected to the first power module, the second power module, the conversion unit, the high color temperature lamp beads, and the low color temperature lamp beads, and the power supply unit is also connected to the second power module and the conversion unit; The second power supply module is specifically used to provide a working voltage for the processing unit and provide an initial voltage for the power supply unit; The power supply unit is used to convert the initial voltage into the working voltage of the conversion unit and output it to the conversion unit; The conversion unit is used to convert the second analog control signal to obtain a digital control signal, and output it to the processing unit; the digital control signal is used to indicate the proportion of the first current value and the second current value relative to the total working current value, the first current value is the effective current value flowing through the high color temperature lamp bead, and the second current value is the effective current value flowing through the low color temperature lamp bead; The processing unit is used to control the duration of the total working current of the color temperature variable lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the digital control signal; The color temperature variable lamp further includes: a color temperature calibration module; the color temperature calibration module is connected to the color temperature control module; The color temperature calibration module is configured to output a color temperature adjustment signal to the color temperature control module when the absolute value of the difference between the actual color temperature of the color temperature variable lamp and the target color temperature of the color temperature variable lamp is greater than a first preset threshold; The color temperature control module is further used to adjust the duration of the total working current of the color temperature changing lamp flowing through the high color temperature lamp beads and the low color temperature lamp beads according to the color temperature adjustment signal, so that the absolute value of the difference between the actual color temperature of the color temperature changing lamp and the target color temperature of the color temperature changing lamp is less than or equal to the first preset threshold; The color temperature lamp further includes: a brightness calibration module; the brightness calibration module is connected to the first power module; The brightness calibration module is used to output a first brightness adjustment signal to the first power module when the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness of the color-changing temperature lamp is greater than a second preset threshold; The first power supply module is used to adjust the total operating current according to the first brightness adjustment signal so that the absolute value of the difference between the actual brightness of the color-changing temperature lamp and the target brightness of the color-changing temperature lamp is less than or equal to the second preset threshold; The color-changing temperature lamp further includes: a temperature adjustment module; the temperature adjustment module is connected to the first power module; The temperature adjustment module is used to output a second brightness adjustment signal to the first power module when the temperature of the color-changing temperature lamp is greater than or equal to a third preset threshold; The first power supply module is further used to adjust the total operating current according to the second brightness adjustment signal to reduce the temperature of the color temperature changing lamp.

2. The color temperature changing lamp according to claim 1, characterized in that: The color temperature variable lamp further comprises: a color temperature acquisition module, the color temperature acquisition module being connected to the color temperature calibration module; The color temperature acquisition module is used to acquire the actual color temperature of the color temperature-changing lamp and output the actual color temperature to the color temperature calibration module.

3. The color temperature changing lamp according to claim 1, characterized in that: The color-changing temperature lamp further includes: a brightness acquisition module; the brightness acquisition module is connected to the brightness calibration module; The brightness acquisition module is used to acquire the actual brightness of the color temperature lamp and output the actual brightness to the brightness calibration module.

4. The color temperature changing lamp according to claim 1, characterized in that: The color-changing temperature lamp further includes: a temperature acquisition module; the temperature acquisition module is connected to the temperature adjustment module; The temperature acquisition module is used to acquire the temperature of the color-changing temperature lamp and output the temperature to the temperature adjustment module.

5. The color temperature changing lamp according to claim 1, characterized in that: The color-changing temperature lamp is an LED color-changing temperature lamp.

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