A three-way selection switch circuit

Abstract

The present invention discloses a three-way selection switch circuit, which relates to the technical field of LED driving, and includes: an A-way selection switch module, connected to the LED lamp beads with a color temperature of 3000K in the three-color temperature selection circuit, for turning on the LED lamp beads with a color temperature of 3000K in the three-color temperature selection circuit; a B-way selection switch module, connected to the LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit, for turning on the LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit; an AB-way selection switch module, respectively connected to the LED lamp beads with a color temperature of 3000K and the LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit, for simultaneously turning on the LED lamp beads with a color temperature of 3000K and the LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit. The present invention can realize the selection and conversion of color temperatures of 3000K, 4000K and 5000K in the three-color temperature selection circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of LED driving, and particularly to a three-way selection switch circuit. Background Art

[0002] In the A path of the three-color temperature selection circuit, the LED beads are of 3000K color temperature, and in the B path, the LED beads are of 5000K color temperature. When both the A and B paths are conducting simultaneously, it is a mixture of 4000K color temperature LED beads, that is, the three-color temperature selection circuit requires the A and B paths to conduct simultaneously.

[0003] Currently, in the common ordinary single-pole three-position rocker switch on the market, there is no switch circuit inside, only a mechanical switch. The mechanical switch can only achieve single-path A conduction, single-path B conduction, and single-path A and single-path B being open simultaneously, and cannot achieve the simultaneous conduction of the A and B paths. Therefore, the common ordinary single-pole three-position rocker switch on the market simply cannot be used in the three-color temperature selection circuit, that is, it cannot achieve the selection and conversion of 3000K, 4000K, and 5000K color temperatures in the three-color temperature selection circuit.

[0004] In summary, there is an urgent need in this field for a three-way selection switch circuit to achieve the selection and conversion of 3000K, 4000K, and 5000K color temperatures in the three-color temperature selection circuit. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-way selection switch circuit that can achieve the selection and conversion of 3000K, 4000K, and 5000K color temperatures in the three-color temperature selection circuit.

[0006] To achieve the above purpose, the present invention provides the following solution:

[0007] A three-way selection switch circuit, the circuit comprising:

[0008] An A-path selection switch module, connected to the 3000K color temperature LED beads of the three-color temperature selection circuit, for turning on the 3000K color temperature LED beads of the three-color temperature selection circuit;

[0009] A B-path selection switch module, connected to the 5000K color temperature LED beads of the three-color temperature selection circuit, for turning on the 5000K color temperature LED beads of the three-color temperature selection circuit;

[0010] An AB-path selection switch module, respectively connected to the 3000K color temperature LED beads and the 5000K color temperature LED beads of the three-color temperature selection circuit, for simultaneously turning on the 3000K color temperature LED beads and the 5000K color temperature LED beads of the three-color temperature selection circuit.

[0011] Optionally, the AB path selection switch module specifically includes a first resistor, a seventh resistor, a first triode, a second resistor, a third resistor, a second triode, a third triode, a fourth resistor, a fifth resistor, a sixth resistor, a fifth diode, a sixth diode, a third diode, and a fourth diode;

[0012] The power supply is respectively connected to the first end of the first resistor, the first end of the seventh resistor, the source electrode of the first triode, the first end of the second resistor, and the first end of the third resistor;

[0013] The second end of the first resistor is respectively connected to the drain electrode of the second triode, the drain electrode of the third triode, and the first end of the sixth resistor;

[0014] The second end of the seventh resistor is respectively connected to the drain electrode of the first triode, the positive electrode of the third diode, and the positive electrode of the fourth diode;

[0015] The drain electrode of the first triode is respectively connected to the positive electrode of the third diode and the positive electrode of the fourth diode; the gate electrode of the first triode is respectively connected to the second end of the second resistor and the source electrode of the second triode;

[0016] The second end of the second resistor is connected to the source electrode of the second triode;

[0017] The drain electrode of the second triode is connected to the drain electrode of the third triode;

[0018] The gate electrode of the second triode is respectively connected to the second end of the third resistor and the source electrode of the third triode;

[0019] The drain electrode of the third triode is connected to the first end of the sixth resistor; the source electrode of the third triode is connected to the second end of the third resistor; the gate electrode of the third triode is connected to the first end of the fourth resistor;

[0020] The second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the negative electrode of the sixth diode, and the negative electrode of the fifth diode;

[0021] The negative electrode of the sixth diode is respectively connected to the first end of the fifth resistor and the negative electrode of the fifth diode;

[0022] The negative electrode of the fifth diode is connected to the first end of the fifth resistor;

[0023] The second end of the sixth resistor is connected to the negative electrode; the second end of the fifth resistor is connected to the negative electrode;

[0024] The positive electrode of the third diode is connected to the positive electrode of the fourth diode; the negative electrode of the third diode is connected to the B-channel selection switch module and the 5000K color temperature LED lamp beads of the three-color temperature selection circuit respectively;

[0025] The negative electrode of the fourth diode is connected to the A-channel selection switch module and the 3000K color temperature LED lamp beads of the three-color temperature selection circuit respectively.

[0026] Optionally, the A-channel selection switch module specifically includes a second switch and a first diode;

[0027] The first end of the second switch is connected to the power supply, the first end of the third resistor, the first end of the second resistor, the first end of the seventh resistor, the source electrode of the first triode, and the first end of the first resistor respectively; the second end of the second switch is connected to the positive electrode of the first diode and the positive electrode of the fifth diode respectively;

[0028] The negative electrode of the first diode is connected to the negative electrode of the fourth diode and the 3000K color temperature LED lamp beads of the three-color temperature selection circuit respectively.

[0029] Optionally, the B-channel selection switch module specifically includes a first switch and a second diode;

[0030] The first end of the first switch is connected to the power supply, the first end of the first resistor, the first end of the seventh resistor, the source electrode of the first triode, the first end of the second resistor, the first end of the third resistor, and the first end of the second switch respectively; the second end of the first switch is connected to the positive electrode of the sixth diode and the positive electrode of the second diode respectively;

[0031] The negative electrode of the second diode is connected to the negative electrode of the third diode and the 5000K color temperature LED lamp beads of the three-color temperature selection circuit respectively.

[0032] Optionally, the number of 3000K color temperature LED lamp beads in the three-color temperature selection circuit is multiple; multiple 3000K color temperature LED lamp beads in the three-color temperature selection circuit are connected in series.

[0033] Optionally, the number of 5000K color temperature LED lamp beads in the three-color temperature selection circuit is multiple; multiple 5000K color temperature LED lamp beads in the three-color temperature selection circuit are connected in series.

[0034] Optionally, the resistance value of the first resistor is 47K; the resistance value of the seventh resistor is 150K; the resistance value of the second resistor is 10K; the resistance value of the third resistor is 430K; the resistance value of the fourth resistor is 430K; the resistance value of the fifth resistor is 430K; the resistance value of the sixth resistor is 47K.

[0035] Optionally, the first triode is a P-type triode; the second triode and the third triode are both N-type triodes.

[0036] Optionally, the first diode, the second diode, the third diode, the fourth diode, the fifth diode, and the sixth diode are all one-way conduction diodes.

[0037] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0038] The three-way selection switch circuit disclosed by the present invention realizes the connection of the LED lamp beads with a color temperature of 3000K, the connection of the LED lamp beads with a color temperature of 5000K, and the simultaneous connection of the LED lamp beads with a color temperature of 3000K and 5000K in the three-color temperature selection circuit by setting the A-way selection switch module, the B-way selection switch module, and the AB-way selection switch module, so as to realize the selection and conversion of the color temperatures of 3000K, 4000K, and 5000K in the three-color temperature selection circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a structural diagram of an embodiment of the three-way selection switch circuit of the present invention;

[0041] Figure 2 It is a circuit diagram of an embodiment of the three-way selection switch circuit of the present invention;

[0042] Figure 3 It is a circuit design diagram in a WI-FI or wired three-way switch;

[0043] Figure 4 It is a schematic diagram of a common single-pole three-position boat switch on the current market. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] The object of the present invention is to provide a three-way selection switch circuit that can achieve the selection and conversion of color temperatures of 3000K, 4000K, and 5000K in a three-color temperature selection circuit.

[0046] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Figure 1 It is a structural diagram of an embodiment of the three-way selection switch circuit of the present invention. Refer to Figure 1 , the three-way selection switch circuit includes an A-way selection switch module 101, a B-way selection switch module 102, and an AB-way selection switch module 103.

[0048] The A-way selection switch module 101 is connected to the LED lamp beads of 3000K color temperature in the three-color temperature selection circuit, and the A-way selection switch module 101 is used to turn on the LED lamp beads of 3000K color temperature in the three-color temperature selection circuit.

[0049] The B-way selection switch module 102 is connected to the LED lamp beads of 5000K color temperature in the three-color temperature selection circuit, and the B-way selection switch module 102 is used to turn on the LED lamp beads of 5000K color temperature in the three-color temperature selection circuit.

[0050] The AB-way selection switch module 103 is respectively connected to the LED lamp beads of 3000K color temperature and 5000K color temperature in the three-color temperature selection circuit, and the AB-way selection switch module 103 is used to simultaneously turn on the LED lamp beads of 3000K color temperature and 5000K color temperature in the three-color temperature selection circuit.

[0051] Figure 2 It is a circuit diagram of an embodiment of the three-way selection switch circuit of the present invention. Refer to Figure 2 , the A-way selection switch module 101 specifically includes a second switch K1-2 and a first diode D1.

[0052] The first end of the second switch K1-2 is respectively connected to the power supply Vcc, the first end of the third resistor R3, the first end of the second resistor R2, the first end of the seventh resistor R7, the source of the first triode Q1, and the first end of the first resistor R1; the second end of the second switch K1-2 is respectively connected to the positive electrode of the first diode D1 and the positive electrode of the fifth diode D5.

[0053] The negative electrode of the first diode D1 is respectively connected to the negative electrode of the fourth diode D4 and the LED lamp beads of 3000K color temperature in the three-color temperature selection circuit.

[0054] The B-way selection switch module 102 specifically includes a first switch K1-1 and a second diode D2.

[0055] The first terminal of the first switch K1-1 is respectively connected to the power supply Vcc, the first terminal of the first resistor R1, the first terminal of the seventh resistor R7, the source electrode of the first triode Q1, the first terminal of the second resistor R2, the first terminal of the third resistor R3, and the first terminal of the second switch K1-2; the second terminal of the first switch K1-1 is respectively connected to the positive electrode of the sixth diode D6 and the positive electrode of the second diode D2.

[0056] The negative electrode of the second diode D2 is respectively connected to the negative electrode of the third diode D3 and the LED lamp bead with a color temperature of 5000K in the three-color temperature selection circuit.

[0057] The AB path selection switch module 103 specifically includes a first resistor R1, a seventh resistor R7, a first triode Q1, a second resistor R2, a third resistor R3, a second triode Q2, a third triode Q3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a fifth diode D5, a sixth diode D6, a third diode D3, and a fourth diode D4.

[0058] The power supply Vcc is respectively connected to the first terminal of the first resistor R1, the first terminal of the seventh resistor R7, the source electrode of the first triode Q1, the first terminal of the second resistor R2, and the first terminal of the third resistor R3.

[0059] The second terminal of the first resistor R1 is respectively connected to the drain electrode of the second triode Q2, the drain electrode of the third triode Q3, and the first terminal of the sixth resistor R6.

[0060] The second terminal of the seventh resistor R7 is respectively connected to the drain electrode of the first triode Q1, the positive electrode of the third diode D3, and the positive electrode of the fourth diode D4.

[0061] The drain electrode of the first triode Q1 is respectively connected to the positive electrode of the third diode D3 and the positive electrode of the fourth diode D4; the gate electrode of the first triode Q1 is respectively connected to the second terminal of the second resistor R2 and the source electrode of the second triode Q2.

[0062] The second terminal of the second resistor R2 is connected to the source electrode of the second triode Q2.

[0063] The drain electrode of the second triode Q2 is connected to the drain electrode of the third triode Q3.

[0064] The gate electrode of the second triode Q2 is respectively connected to the second terminal of the third resistor R3 and the source electrode of the third triode Q3.

[0065] The drain electrode of the third triode Q3 is connected to the first terminal of the sixth resistor R6; the source electrode of the third triode Q3 is connected to the second terminal of the third resistor R3; the gate electrode of the third triode Q3 is connected to the first terminal of the fourth resistor R4.

[0066] The second terminal of the fourth resistor R4 is respectively connected to the first terminal of the fifth resistor R5, the cathode of the sixth diode D6, and the cathode of the fifth diode D5.

[0067] The cathode of the sixth diode D6 is respectively connected to the first terminal of the fifth resistor R5 and the cathode of the fifth diode D5.

[0068] The cathode of the fifth diode D5 is connected to the first terminal of the fifth resistor R5.

[0069] The second terminal of the sixth resistor R6 is connected to the negative pole; the second terminal of the fifth resistor R5 is connected to the negative pole.

[0070] The anode of the third diode D3 is connected to the anode of the fourth diode D4; the cathode of the third diode D3 is respectively connected to the B-path selection switch module and the 5000K color temperature LED lamp beads of the three-color temperature selection circuit.

[0071] The cathode of the fourth diode D4 is respectively connected to the A-path selection switch module and the 3000K color temperature LED lamp beads of the three-color temperature selection circuit.

[0072] Among them, the number of 3000K color temperature LED lamp beads in the three-color temperature selection circuit is multiple; multiple 3000K color temperature LED lamp beads in the three-color temperature selection circuit are connected in series and used as the light source of the lighting fixture for lighting, such as Figure 2 LED21~LED2n in.

[0073] The number of 5000K color temperature LED lamp beads in the three-color temperature selection circuit is multiple; multiple 5000K color temperature LED lamp beads in the three-color temperature selection circuit are connected in series and used as the light source of the lighting fixture for lighting, such as Figure 2 LED11~LED1n in.

[0074] The resistance value of the first resistor R1 is 47K; the resistance value of the seventh resistor R7 is 150K; the resistance value of the second resistor R2 is 10K; the resistance value of the third resistor R3 is 430K; the resistance value of the fourth resistor R4 is 430K; the resistance value of the fifth resistor R5 is 430K; the resistance value of the sixth resistor R6 is 47K. The functions of the first resistor R1, the seventh resistor R7, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are current limiting.

[0075] The first triode Q1 is a P-type triode with the model 12P10; the second triode Q2 and the third triode Q3 are both N-type triodes with the model 2N3904.

[0076] The first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5, and the sixth diode D6 are all unidirectional conduction diodes with the model A7, and their functions are unidirectional conduction.

[0077] Since the ordinary single-pole three-position boat-shaped switch on the market at present can only achieve the following functions: single-channel A path, single-channel B path, and single-channel A and single-channel B are open at the same time, and it is impossible to achieve the function of simultaneous conduction of A path and B path. If you want to achieve the functions of single-channel A path, single-channel B path, and simultaneous conduction of A path and B path, you need to use an integrated circuit built with a control chip and cooperate with software control to achieve the control functions of the above three-way switch. For example Figure 3 In the circuit design of the patent "WI-FI or Wired Three-Way Switch" shown, it is necessary to use a controller, a relay, an amplifier, a terminal controller input by the user, etc. to build, and the whole is huge and complicated, and a small and portable circuit design cannot be achieved. Therefore, the present invention provides a three-way selection switch circuit, which can be applied to an ordinary single-pole three-position boat-shaped switch, so as to achieve the functions of single-channel A, single-channel B, and simultaneous conduction of AB two channels. Figure 4 It is a schematic diagram of an ordinary single-pole three-position boat-shaped switch on the market at present. See Figure 4, currently, the common single-pole three-position rocker switch on the market includes three positions, namely K1-1, K1-2, and K1-3. When the common single-pole three-position rocker switch is turned to K1-1, the B path is connected. When it is turned to K1-2, the A path is connected. In the middle position K1-3, that is, when the common single-pole three-position rocker switch is neither turned to K1-1 nor K1-2 and is in the middle position, neither the A path nor the B path is connected. To address the above drawbacks, the present invention provides a three-way selection switch circuit. Through a simple circuit built only with resistors, diodes, and transistors, it can achieve the functions of selecting a single A path, a single B path, and the simultaneous connection of both the A path and the B path. The circuit design is simple, the components are simple, the principle is simple, and the cost is significantly reduced compared to the designs on the market. The three-way selection switch circuit of the present invention is applied to a common single-pole three-position rocker switch. When the common single-pole three-position rocker switch is turned to K1-1, the current enters the diode D2 through the switch K1-1. The diode D2 conducts forward and enters the 5000K color temperature LED beads LED11, LED12... LED1n of the three-color temperature selection circuit, that is, the 5000K color temperature LED beads are lit. At the same time, since Vg = Vs, the transistor Q1 is cut off. Additionally, the transistors Q2 and Q3 are also cut off. Therefore, the current in the circuit can only pass through the 5000K color temperature LED beads LED11, LED12... LED1n of the three-color temperature selection circuit, that is, only the 5000K color temperature LED beads are lit, and the current does not pass through the 3000K color temperature LED beads LED21, LED22... LED2n of the three-color temperature selection circuit. So the 3000K color temperature LED beads are not lit. Similarly, when the common single-pole three-position rocker switch is turned to K1-2, the current enters the diode D1 through the switch K1-2. The diode D1 conducts forward and enters the 3000K color temperature LED beads LED21, LED22... LED2n of the three-color temperature selection circuit, that is, the 3000K color temperature LED beads are lit. At the same time, the transistor Q3 conducts, the transistor Q2 is cut off, and Vg = Vs, so the transistor Q1 is cut off. Therefore, the current in the circuit can only pass through the 3000K color temperature LED beads LED21, LED22... LED2n of the three-color temperature selection circuit, that is, only the 3000K color temperature LED beads are lit, and the current does not pass through the 3000K color temperature LED beads LED11, LED12... LED1n of the three-color temperature selection circuit. So the 5000K color temperature LED beads are not lit.When the ordinary single-pole three-position boat switch is turned to K1-3, that is, the ordinary single-pole three-position boat switch is neither turned to K1-1 nor K1-2, and the switch is in the middle position. The current enters the triodes Q1 and Q2 through the resistor R2. Among them, the triodes Q1 and Q2 are conducting, and the triode Q3 is cut off. So the current enters the diodes D3 and D4, and the diodes D3 and D4 conduct forward. Therefore, the current evenly flows into the 5000K color temperature LED beads LED11, LED12......LED1n of the three-color temperature selection circuit and the 3000K color temperature LED beads LED21, LED22......LED2n of the three-color temperature selection circuit. So the LED beads LED11, LED12......LED1n and LED21, LED22......LED2n light up at the same time, that is, the 3000K color temperature and 5000K color temperature LED beads light up at the same time, and the two-color temperature LED beads are mixed to form a 4000K color temperature. Through circuit design, the present invention realizes the function of three-position selection of single path A, single path B, and both A and B paths being connected at the same time. When the switch selects K1-1, path B is connected and path A is open; when the switch selects K1-2, path A is connected and path B is open; when the switch selects K1-3, both path A and path B are connected. The three-position selection switch circuit of the present invention uses the functions of resistance, single-phase conduction of diodes, and on-off functions of triodes to build a three-position switch that can realize path A being connected, path B being connected, and both A and B paths being connected at the same time. This function is very convenient to apply in a switch selection circuit, such as a three-color temperature selection circuit.

[0078] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0079] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A three-way selection switch circuit, characterized in that The circuit includes: An A-path selection switch module, connected to the 3000K color temperature LED beads of the three-color temperature selection circuit, for turning on the 3000K color temperature LED beads of the three-color temperature selection circuit; A B-path selection switch module, connected to the 5000K color temperature LED beads of the three-color temperature selection circuit, for turning on the 5000K color temperature LED beads of the three-color temperature selection circuit; An AB-path selection switch module, respectively connected to the 3000K color temperature LED beads and the 5000K color temperature LED beads of the three-color temperature selection circuit, for simultaneously turning on the 3000K color temperature LED beads and the 5000K color temperature LED beads of the three-color temperature selection circuit; The AB-path selection switch module specifically includes a first resistor, a seventh resistor, a first triode, a second resistor, a third resistor, a second triode, a third triode, a fourth resistor, a fifth resistor, a sixth resistor, a fifth diode, a sixth diode, a third diode, and a fourth diode; The power supply is respectively connected to the first end of the first resistor, the first end of the seventh resistor, the source electrode of the first triode, the first end of the second resistor, and the first end of the third resistor; The second end of the first resistor is respectively connected to the drain electrode of the second triode, the drain electrode of the third triode, and the first end of the sixth resistor; The second end of the seventh resistor is respectively connected to the drain electrode of the first triode, the positive electrode of the third diode, and the positive electrode of the fourth diode; The drain electrode of the first triode is respectively connected to the positive electrode of the third diode and the positive electrode of the fourth diode; the gate electrode of the first triode is respectively connected to the second end of the second resistor and the source electrode of the second triode; The second end of the second resistor is connected to the source electrode of the second triode; The drain electrode of the second triode is connected to the drain electrode of the third triode; The gate electrode of the second triode is respectively connected to the second end of the third resistor and the source electrode of the third triode; The drain electrode of the third triode is connected to the first end of the sixth resistor; the source electrode of the third triode is connected to the second end of the third resistor; the gate electrode of the third triode is connected to the first end of the fourth resistor; The second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the negative electrode of the sixth diode, and the negative electrode of the fifth diode; The negative electrode of the sixth diode is respectively connected to the first end of the fifth resistor and the negative electrode of the fifth diode; The negative electrode of the fifth diode is connected to the first end of the fifth resistor; The second end of the sixth resistor is connected to the negative pole; the second end of the fifth resistor is connected to the negative pole; The positive electrode of the third diode is connected to the positive electrode of the fourth diode; the negative electrode of the third diode is respectively connected to the B-path selection switch module and the 5000K color temperature LED beads of the three-color temperature selection circuit; The negative electrode of the fourth diode is respectively connected to the A-path selection switch module and the 3000K color temperature LED beads of the three-color temperature selection circuit; The A-path selection switch module specifically includes a second switch and a first diode; The first end of the second switch is respectively connected to the power supply, the first end of the third resistor, the first end of the second resistor, the first end of the seventh resistor, the source electrode of the first triode, and the first end of the first resistor; the second end of the second switch is respectively connected to the positive electrode of the first diode and the positive electrode of the fifth diode; The negative electrode of the first diode is respectively connected to the negative electrode of the fourth diode and the LED lamp bead with a color temperature of 3000K in the three-color temperature selection circuit; The B-path selection switch module specifically includes a first switch and a second diode; The first end of the first switch is respectively connected to the power supply, the first end of the first resistor, the first end of the seventh resistor, the source electrode of the first triode, the first end of the second resistor, the first end of the third resistor, and the first end of the second switch; the second end of the first switch is respectively connected to the positive electrode of the sixth diode and the positive electrode of the second diode; The negative electrode of the second diode is respectively connected to the negative electrode of the third diode and the LED lamp bead with a color temperature of 5000K in the three-color temperature selection circuit.

2. The three-way selection switch circuit according to claim 1, characterized in that The number of LED lamp beads with a color temperature of 3000K in the three-color temperature selection circuit is multiple; multiple LED lamp beads with a color temperature of 3000K in the three-color temperature selection circuit are connected in series.

3. The three-way selection switch circuit according to claim 1, wherein The number of LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit is multiple; multiple LED lamp beads with a color temperature of 5000K in the three-color temperature selection circuit are connected in series.

4. The three-way selection switch circuit according to claim 1, wherein The resistance value of the first resistor is 47K; the resistance value of the seventh resistor is 150K; the resistance value of the second resistor is 10K; the resistance value of the third resistor is 430K; the resistance value of the fourth resistor is 430K; the resistance value of the fifth resistor is 430K; the resistance value of the sixth resistor is 47K.

5. The three-way selection switch circuit according to claim 1, characterized in that The first triode is a P-type triode; the second triode and the third triode are both N-type triodes.

6. The three-way selection switch circuit according to claim 1, wherein The first diode, the second diode, the third diode, the fourth diode, the fifth diode, and the sixth diode are all unidirectional conduction diodes.

Images