Control circuit of lamp and lamp

Abstract

The present invention discloses a control circuit of a lamp and the lamp, comprising: a driving power supply, a first switch component, a second switch component, a first light source, a second light source and a switching circuit; the driving power supply is respectively connected to the input end of the first switch component, the input end of the second switch component and the first input end of the switching circuit; the output end of the first switch component is respectively connected to the input end of the first light source and the second input end of the switching circuit; the output end of the second switch component is respectively connected to the input end of the second light source and the third input end of the switching circuit; the output end of the first light source and the output end of the second light source are both grounded; when the first switch component is in a connected state and the second switch component is in a disconnected state, the first light source is lit; when the second switch component is in a connected state and the first switch component is in a disconnected state, the second light source is lit; when the first switch component and the second switch component are both in a connected state, the first light source and the second light source are both lit.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting, and in particular, relates to a control circuit of a lamp and the lamp. Background Art

[0002] With the development of society, LED lights have gradually entered people's lives. LED lights are widely used and are used in many public places, such as billboards, roads, railway tunnels, bridges, culverts, squares, buildings, etc.

[0003] However, the LEDs currently used still have some shortcomings. For example, most LED lamps can only provide light of one color temperature when lighting, and cannot provide light of the corresponding color temperature in different application occasions. If you want to change the light of different color temperatures, you can only replace different lamps, which affects the user experience. Summary of the invention

[0004] In view of this, the present invention provides a control circuit of a lamp and a lamp, which can change the color temperature value of the lamp according to different application occasions to meet the lighting needs of users.

[0005] In order to solve the technical problems in the prior art, the present invention provides a control circuit of a lamp, comprising: a driving power supply, a first switch component, a second switch component, a first light source, a second light source and a switching circuit; wherein,

[0006] The switching circuit includes a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, a first ground terminal and a second ground terminal; wherein the first output terminal is connected to the input terminal of the first light source, the second output terminal is connected to the input terminal of the second light source, and the first ground terminal and the second ground terminal are both grounded;

[0007] The driving power supply is respectively connected to the input end of the first switch component, the input end of the second switch component and the first input end of the switching circuit;

[0008] The output end of the first switch component is connected to the input end of the first light source and the second input end of the switching circuit respectively;

[0009] The output end of the second switch component is connected to the input end of the second light source and the third input end of the switching circuit respectively;

[0010] The output end of the first light source and the output end of the second light source are both grounded;

[0011] When the first switch component is in a connected state and the second switch component is in a disconnected state, the path between the switching circuit and the first light source and the second light source is disconnected, and the first light source is lit;

[0012] When the second switch component is in a connected state and the first switch component is in a disconnected state, the path between the switching circuit and the first light source and the second light source is disconnected, and the second light source is lit;

[0013] When the first switch component and the second switch component are both in a connected state, the switching circuit is connected to the passage between the first light source and the second light source, and the first light source and the second light source are lit.

[0014] Optionally, the first switch component includes a first switch, a first diode and a second diode;

[0015] One end of the first switch is connected to the driving power supply, and the other end is connected to the input end of the first diode and the input end of the second diode respectively; the output end of the first diode is connected to the input end of the first light source; the output end of the second diode is connected to the second input end of the switching circuit;

[0016] The second switch component includes a second switch, a third diode and a fourth diode;

[0017] One end of the second switch is connected to the driving power supply, and the other end is respectively connected to the input end of the third diode and the input end of the fourth diode; the output end of the third diode is connected to the input end of the second light source; the output end of the fourth diode is connected to the third input end of the switching circuit.

[0018] Optionally, the switching circuit includes a comparison circuit, a fifth diode, a sixth diode, a first resistor and a second resistor; wherein,

[0019] The comparison circuit is respectively connected to the driving circuit, the output end of the first switch component and the output end of the second switch component, and is grounded through the first resistor and the second resistor;

[0020] The input end of the fifth diode is connected to the comparison circuit, and the output end of the fifth diode is connected to the input end of the first light source to form a first output end of the switching circuit;

[0021] An input end of the sixth diode is connected to the comparison circuit, and an output end of the sixth diode is connected to an input end of the second light source to form a second output end of the switching circuit.

[0022] Optionally, a resistance value of the first resistor is smaller than a resistance value of the second resistor.

[0023] Optionally, the comparison circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a MOS transistor, a first transistor and a second transistor; wherein,

[0024] One end of the third resistor is connected to the driving power supply, and the other end is connected to the first resistor;

[0025] The gate of the MOS tube is connected to the driving circuit, the source is connected to the driving power supply through the fourth resistor, and the drain is connected to the input end of the fifth diode and the input end of the sixth diode;

[0026] The collector of the first transistor is connected to the source of the MOS transistor, the base is connected to the driving power supply through the fifth resistor, and the emitter is connected to the third resistor and the first resistor;

[0027] The collector of the second transistor is connected to the base of the first transistor, the base is respectively connected to the first switch component, the second switch component and the second resistor through the sixth resistor, and the emitter is connected to the third resistor and the first resistor.

[0028] Optionally, the MOS tube is a PMOS tube, and the first transistor and the second transistor are both NPN tubes.

[0029] Optionally, the resistance value of the third resistor is smaller than the resistance value of the sixth resistor;

[0030] The resistance value of the fourth resistor is smaller than the resistance value of the third resistor, the resistance value of the fifth resistor, and the resistance value of the sixth resistor.

[0031] Optionally, the first light source and the second light source have different color temperature values.

[0032] Optionally, a color temperature value of the first light source is smaller than a color temperature value of the second light source.

[0033] Correspondingly, an embodiment of the present invention further provides a lamp, comprising the control circuit of the lamp as described above.

[0034] The technical solution provided by the present invention changes the on and off of the first light source and the second light source by controlling the connectivity of the first switch component and the second switch component, so as to provide light of different color temperatures. At the same time, by controlling the connectivity of the first switch component and the second switch component, the path state between the switching circuit and the first light source and the second light source can also be changed to ensure that when the switch component is in the disconnected state, the corresponding light source will not light up due to leakage current. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or 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 work.

[0036] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0037] In the attached picture:

[0038] Figure 1 A circuit diagram of a control circuit of a lamp provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of 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.

[0040] The following will describe the implementation methods of the present invention in detail with the help of accompanying drawings and examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. The structure of the present invention is further described below with the help of the accompanying drawings.

[0041] Figure 1 A circuit diagram of a control circuit of a lamp provided in an embodiment of the present invention, such as Figure 1 shown.

[0042] The present invention provides a control circuit for a lamp, comprising: a driving power supply 10 , a first switch component 20 , a second switch component 30 , a first light source 40 , a second light source 50 and a switching circuit 60 .

[0043] The switching circuit 60 includes a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, a first ground terminal and a second ground terminal. The first output terminal is connected to the input terminal of the first light source 40, the second output terminal is connected to the input terminal of the second light source 50, and the first ground terminal and the second ground terminal are both grounded.

[0044] The driving power supply 10 is respectively connected to the input end of the first switch component 20, the input end of the second switch component 30 and the first input end of the switching circuit 60. The output end of the first switch component 20 is respectively connected to the input end of the first light source 40 and the second input end of the switching circuit 60. The output end of the second switch component 30 is respectively connected to the input end of the second light source 50 and the third input end of the switching circuit 60. The output end of the first light source 40 and the output end of the second light source 50 are both grounded.

[0045] When the first switch assembly 20 is in the on state and the second switch assembly 30 is in the off state, the path between the switching circuit 60 and the first light source 40 and the second light source 50 is disconnected, and the first light source 40 is lit.

[0046] When the second switch assembly 30 is in the on state and the first switch assembly 20 is in the off state, the path between the switching circuit 60 and the first light source 40 and the second light source 50 is disconnected, and the second light source 50 is lit.

[0047] When the first switch assembly 20 and the second switch assembly 30 are both in the connected state, the passage between the switching circuit 60 and the first light source 40 and the second light source 50 is connected, and the first light source 40 and the second light source 50 are lit.

[0048] The technical solution provided by the present invention changes the on and off of the first light source 40 and the second light source 50 by controlling the connectivity of the first switch component 20 and the second switch component 30, so as to provide light of different color temperatures. At the same time, by controlling the connectivity of the first switch component 20 and the second switch component 30, the path state between the switching circuit 60 and the first light source 40 and the second light source 50 can also be changed to ensure that when the switch component is in the disconnected state, the corresponding light source will not light up due to leakage current.

[0049] In the embodiment of the present invention, the color temperature values ​​of the first light source 40 and the second light source 50 are different. Therefore, turning on different light sources can provide light with different color temperatures, and when turned on at the same time, light with a neutral color temperature can be provided. For example, the color temperature value of the first light source 40 is less than the color temperature value of the second light source 50. For example, the color temperature value of the first light source 40 is 3000K, and the color temperature value of the second light source 50 is 6500K. When only the first light source 40 is lit, the color temperature value of the lamp is 3000K, when only the second light source 50 is lit, the color temperature value of the lamp is 6500K, and when both the first light source 40 and the second light source 50 are lit, the color temperature value of the lamp is 4750K. Of course, according to different needs, the color temperature values ​​of the first light source 40 and the second light source 50 can also be adjusted accordingly, and the embodiment of the present invention does not make specific limitations.

[0050] Furthermore, in an embodiment of the present invention, the driving power supply 10 includes but is not limited to a non-isolated constant current power supply, and the specification of the driving power supply 10 can be selected as 72V-1.25A. One end of the non-isolated constant current power supply is grounded through a wire, and the other end can be connected to the first switch component 20 and the second switch component 30 respectively through a wire. By controlling the connectivity of the first switch component 20 and the second switch component 30, different light sources can be controlled to light up, which is very convenient. The lamp with a control circuit can change the color temperature value of the light provided by the lamp before installation, thereby meeting different application requirements.

[0051] It should be noted that, in the above-mentioned embodiments and the following embodiments of the present invention, unless otherwise defined, each element in the control circuit can be Figure 1 The identifier symbol in .

[0052] Figure 1 In the example, the first switch is identified by S1 and the second switch is identified by S2.

[0053] The first light source 40 is denoted by LED1 , and the second light source 50 is denoted by LED2 .

[0054] The identification symbol of the first diode is D1, the identification symbol of the second diode is D2, the identification symbol of the third diode is D3, the identification symbol of the fourth diode is D4, the identification symbol of the fifth diode is D5, and the identification symbol of the sixth diode is D6.

[0055] The identification symbol of the first resistor is R1, the identification symbol of the second resistor is R2, the identification symbol of the third resistor is R3, the identification symbol of the fourth resistor is R4, the identification symbol of the fifth resistor is R5, and the identification symbol of the sixth resistor is R6.

[0056] The identification symbol of the MOS tube is Q1, the identification symbol of the first transistor is Q2, and the identification symbol of the second transistor is Q3.

[0057] Continue to see Figure 1 In an achievable embodiment of the present invention, the first switch assembly 20 includes a first switch, a first diode and a second diode. The first switch includes but is not limited to a toggle switch. One end of the first switch is connected to the driving power supply 10, and the other end is respectively connected to the input end of the first diode and the input end of the second diode; the output end of the first diode is connected to the input end of the first light source 40; the output end of the second diode is connected to the second input end of the switching circuit 60.

[0058] The second switch assembly 30 includes a second switch, a third diode and a fourth diode. The second switch includes but is not limited to a toggle switch. One end of the second switch is connected to the driving power supply 10, and the other end is connected to the input end of the third diode and the input end of the fourth diode respectively; the output end of the third diode is connected to the input end of the second light source 50; the output end of the fourth diode is connected to the third input end of the switching circuit 60.

[0059] When the first switch is in the connected state and the second switch is in the disconnected state, the driving power supply 10 provides power to the first light source 40 through the first diode along the path formed by the first switch, so that the first light source 40 is lit. Since the second switch is in the disconnected state, the driving power supply 10 cannot provide power to the second light source 50, and the second light source 50 is in the extinguished state. At the same time, the driving power supply 10 only provides power to the switching circuit 60 through the second diode, and the path between the switching circuit 60 and the first light source 40 and the second light source 50 is disconnected to ensure that the second light source 50 will not be lit due to leakage current. At this time, only the first light source 40 is lit, and the color temperature of the lamp is the color temperature value of the first light source 40. In the embodiment of the present invention, the first light source 40 and the second light source 50 both include a plurality of LED lamp beads connected in series or a plurality of LED lamp beads connected in parallel, or a plurality of LED lamp beads connected in series and in parallel.

[0060] When the second switch is in the connected state and the first switch is in the disconnected state, the driving power supply 10 provides power to the second light source 50 through the third diode along the path formed by the second switch, so that the second light source 50 is lit. Since the first switch is in the disconnected state, the driving power supply 10 cannot provide power to the first light source 40, and the first light source 40 is in the extinguished state. At the same time, the driving power supply 10 only provides power to the switching circuit 60 through the fourth diode, and the path between the switching circuit 60 and the first light source 40 and the second light source 50 is disconnected to ensure that the first light source 40 will not be lit due to leakage current. At this time, only the second light source 50 is lit, and the color temperature of the lamp is the color temperature value of the second light source 50.

[0061] When the first switch and the second switch are both in the connected state, the driving power supply 10 can provide power to the first light source 40 through the first diode, so that the first light source 40 is lit, and provide power to the second light source 50 through the third diode, so that the second light source 50 is lit. At the same time, the driving power supply 10 provides power to the switching circuit 60 through the second diode and the fourth diode, and the switching circuit 60 is connected to the passage between the first light source 40 and the second light source 50. At this time, the first light source 40 and the second light source 50 are both lit, and the color temperature of the lamp is the neutral color temperature value of the first light source 40 and the second light source 50.

[0062] In an embodiment of the present invention, the first diode, the second diode, the third diode and the fourth diode can have different specifications according to different requirements. For example, the specifications of the first diode and the fourth diode can be selected as DSR-D / S2D-1A-200V, and the specifications of the second diode and the third diode can be selected as SS3200-3A / 200V.

[0063] Further, see Figure 1 In the embodiment of the present invention, the switching circuit 60 includes a comparison circuit 61, a fifth diode, a sixth diode, a first resistor and a second resistor. The comparison circuit 61 is respectively connected to the driving circuit, the output end of the first switch component 20 and the output end of the second switch component 30, and is grounded through the first resistor and the second resistor. The input end of the fifth diode is connected to the comparison circuit 61, and the output end of the fifth diode is connected to the input end of the first light source 40 to form the first output end of the switching circuit 60. The input end of the sixth diode is connected to the comparison circuit 61, and the output end of the sixth diode is connected to the input end of the second light source 50 to form the second output end of the switching circuit 60.

[0064] The fifth diode is the first output terminal of the switching circuit 60. The connection method of the fifth diode can ensure the direction of the current, and the current will not flow from the first output terminal to the switching circuit 60. Similarly, the sixth diode is the second output terminal of the switching circuit 60. The connection method of the sixth diode can ensure the direction of the current, and the current will not flow from the second output terminal to the switching circuit 60. The specifications of the fifth diode and the sixth diode can be selected as SS3200-3A / 200V.

[0065] The first resistor and the second resistor realize the grounding of the comparison circuit 61 and play a voltage dividing role. Further, the resistance value of the first resistor is smaller than the resistance value of the second resistor. The resistance value of the first resistor can be selected as 47KΩ, and the resistance value of the second resistor can be selected as 470KΩ.

[0066] In the embodiment of the present invention, the comparison circuit 61 includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a MOS transistor, a first triode and a second triode; wherein the MOS transistor is a Metal Oxide Semiconductor, a voltage control device, which has three motors: a source, a drain and a gate, and the drain-source current can be controlled by the gate voltage. The MOS transistor in the comparison circuit 61 is a PMOS transistor. The first triode and the second triode are both NPN transistors, and the specifications of the first triode and the second triode can both be 2N3904.

[0067] One end of the third resistor is connected to the driving power supply 10, and the other end is connected to the first resistor. The gate of the MOS tube is connected to the driving circuit, the source is connected to the driving power supply 10 through the fourth resistor, and the drain is connected to the input end of the fifth diode and the input end of the sixth diode. The collector of the first triode is connected to the source of the MOS tube, the base is connected to the driving power supply 10 through the fifth resistor, and the emitter is connected to the third resistor and the first resistor. The collector of the second triode is connected to the base of the first triode, the base is connected to the first switch component 20, the second switch component 30 and the second resistor respectively through the sixth resistor, and the emitter is connected to the third resistor and the first resistor.

[0068] Furthermore, the resistance value of the third resistor is smaller than the resistance value of the sixth resistor, and the resistance value of the fourth resistor is smaller than the resistance value of the third resistor, the resistance value of the fifth resistor, and the resistance value of the sixth resistor. In the embodiment of the present invention, the resistance value of the third resistor can be selected as 47KΩ, the resistance value of the fourth resistor can be selected as 10KΩ, the resistance value of the fifth resistor can be selected as 470KΩ, and the resistance value of the sixth resistor can be selected as 470KΩ.

[0069] When the first switch is in the connected state and the second switch is in the disconnected state, the driving power supply 10 provides power to the first light source 40 through the first diode along the path formed by the first switch, so that the first light source 40 is lit. Since the second switch is in the disconnected state, the driving power supply 10 cannot provide power to the second light source 50, and the second light source 50 is in the extinguished state. At the same time, the driving power supply 10 only provides power to the switching circuit 60 through the second diode. Since the resistance value of the third resistor is less than the resistance value of the sixth resistor, that is, the voltage drop of the third resistor is greater than the voltage drop of the sixth resistor, the second transistor is cut off, the first transistor is turned on, and the MOS tube is turned off, that is, the path between the MOS tube and the first light source 40 and the second light source 50 is disconnected. At this time, only the first light source 40 is lit, and the color temperature of the lamp is the color temperature value of the first light source 40.

[0070] When the second switch is in the connected state and the first switch is in the disconnected state, the driving power supply 10 provides power to the second light source 50 through the third diode along the path formed by the second switch, so that the second light source 50 is lit. Since the first switch is in the disconnected state, the driving power supply 10 cannot provide power to the first light source 40, and the first light source 40 is in the extinguished state. At the same time, the driving power supply 10 only provides power to the switching circuit 60 through the fourth diode. Since the resistance value of the third resistor is less than the resistance value of the sixth resistor, that is, the voltage drop of the third resistor is greater than the voltage drop of the sixth resistor, the second transistor is cut off, the first transistor is turned on, and the MOS tube is turned off, that is, the path between the MOS tube and the first light source 40 and the second light source 50 is disconnected. At this time, only the second light source 50 is lit, and the color temperature of the lamp is the color temperature value of the second light source 50.

[0071] When the first switch and the second switch are both in the connected state, the driving power supply 10 can provide power to the first light source 40 through the first diode, so that the first light source 40 is lit, and provide power to the second light source 50 through the third diode, so that the second light source 50 is lit. At the same time, the driving power supply 10 provides power to the switching circuit 60 through the second diode and the fourth diode, the voltage drop of the third resistor is greater than the voltage drop of the fifth resistor, the second transistor is turned on, the first transistor is turned on, and the MOS tube is turned on, that is, the MOS tube is connected to the path between the first light source 40 and the second light source 50. At this time, the first light source 40 and the second light source 50 are both lit, and the color temperature of the lamp is the neutral color temperature value of the first light source 40 and the second light source 50.

[0072] In summary, the technical solution provided by the present invention changes the on and off of the first light source 40 and the second light source 50 by controlling the connectivity of the first switch component 20 and the second switch component 30, so as to provide light of different color temperatures. At the same time, by controlling the connectivity of the first switch component 20 and the second switch component 30, the path state between the switching circuit 60 and the first light source 40 and the second light source 50 can also be changed to ensure that when the switch component is in the disconnected state, the corresponding light source will not light up due to leakage current.

[0073] It should be noted that the control circuit of the lamp provided in the embodiment of the present invention can be applied to various lamps, including but not limited to floodlights, high bay lights, wall washers, etc. Further, the embodiment of the present invention also provides a lamp, the lamp includes the control circuit of the lamp as described above. The control circuit can be implemented by the control circuit described in the above embodiment, and will not be described one by one here.

[0074] It should be noted that although the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, it should not be understood as limiting the scope of protection of the present invention. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still belong to the scope of protection of the present invention.

[0075] The examples of the present invention are intended to concisely illustrate the technical features of the present invention so that those skilled in the art can intuitively understand the technical features of the present invention, and are not intended to be an improper limitation of the present invention.

[0076] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and those skilled in the art may understand and implement them without inventive effort.

[0077] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A control circuit for a lamp, characterized in that: include: A driving power supply, a first switch component, a second switch component, a first light source, a second light source and a switching circuit; wherein, The switching circuit includes a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, a first ground terminal and a second ground terminal; wherein the first output terminal is connected to the input terminal of the first light source, the second output terminal is connected to the input terminal of the second light source, and the first ground terminal and the second ground terminal are both grounded; The driving power supply is respectively connected to the input end of the first switch component, the input end of the second switch component and the first input end of the switching circuit; The output end of the first switch component is connected to the input end of the first light source and the second input end of the switching circuit respectively; The output end of the second switch component is connected to the input end of the second light source and the third input end of the switching circuit respectively; The output end of the first light source and the output end of the second light source are both grounded; When the first switch component is in a connected state and the second switch component is in a disconnected state, the path between the switching circuit and the first light source and the second light source is disconnected, and the first light source is lit; When the second switch component is in a connected state and the first switch component is in a disconnected state, the path between the switching circuit and the first light source and the second light source is disconnected, and the second light source is lit; When the first switch component and the second switch component are both in a connected state, the switching circuit is connected to the passage between the first light source and the second light source, and the first light source and the second light source are both lit.

2. The control circuit according to claim 1, characterized in that: The first switch component includes a first switch, a first diode and a second diode; One end of the first switch is connected to the driving power supply, and the other end is connected to the input end of the first diode and the input end of the second diode respectively; the output end of the first diode is connected to the input end of the first light source; the output end of the second diode is connected to the second input end of the switching circuit; The second switch component includes a second switch, a third diode and a fourth diode; One end of the second switch is connected to the driving power supply, and the other end is respectively connected to the input end of the third diode and the input end of the fourth diode; the output end of the third diode is connected to the input end of the second light source; the output end of the fourth diode is connected to the third input end of the switching circuit.

3. The control circuit according to claim 1 or 2, characterized in that: The switching circuit includes a comparison circuit, a fifth diode, a sixth diode, a first resistor and a second resistor; wherein, The comparison circuit is respectively connected to the driving power supply, the output end of the first switch component and the output end of the second switch component, and is grounded through the first resistor and the second resistor; The input end of the fifth diode is connected to the comparison circuit, and the output end of the fifth diode is connected to the input end of the first light source to form a first output end of the switching circuit; An input end of the sixth diode is connected to the comparison circuit, and an output end of the sixth diode is connected to an input end of the second light source to form a second output end of the switching circuit.

4. The control circuit according to claim 3, characterized in that: The resistance value of the first resistor is smaller than the resistance value of the second resistor.

5. The control circuit according to claim 3, characterized in that: The comparison circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a MOS transistor, a first transistor and a second transistor; wherein, One end of the third resistor is connected to the driving power supply, and the other end is connected to the first resistor; The gate of the MOS tube is connected to the driving power supply, the source is connected to the driving power supply through the fourth resistor, and the drain is connected to the input end of the fifth diode and the input end of the sixth diode; The collector of the first transistor is connected to the source of the MOS transistor, the base is connected to the driving power supply through the fifth resistor, and the emitter is connected to the third resistor and the first resistor; The collector of the second transistor is connected to the base of the first transistor, the base is respectively connected to the first switch component, the second switch component and the second resistor through the sixth resistor, and the emitter is connected to the third resistor and the first resistor.

6. The control circuit according to claim 5, characterized in that: The MOS tube is a PMOS tube, and the first transistor and the second transistor are both NPN tubes.

7. The control circuit according to claim 5, characterized in that: The resistance value of the third resistor is smaller than the resistance value of the sixth resistor; The resistance value of the fourth resistor is smaller than the resistance value of the third resistor, the resistance value of the fifth resistor, and the resistance value of the sixth resistor.

8. The control circuit according to claim 1, characterized in that: The color temperature value of the first light source is smaller than the color temperature value of the second light source.

9. A lamp, characterized in that: A control circuit comprising the lamp as claimed in any one of claims 1 to 8.

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