Controlled driving circuit for color mixing of two light sources

Abstract

The utility model discloses a controlled drive circuit for color mixing of two light sources, which is characterized in that two controlled MOS (Metal Oxide Semiconductor) tube switch modules are complementarily connected, so that when one controlled MOS tube switch module is switched on, the other controlled MOS tube switch module is switched off, a path of PWM (Pulse-Width Modulation) signal is input to control a double-color lamp to be complementarily electrified so as to realize the effect of dimming and color mixing of the double-color lamp, and a PWM conversion chip is omitted; due to the action of the first voltage-regulator tube voltage-stabilizing module and the pull-up resistor module, on one hand, when the first controlled MOS tube switch module is cut off, the direct-current voltage output positive electrode connecting end supplies power to the second controlled MOS tube switch module through the pull-up resistor module; the voltage of the switch control signal input end of the second controlled MOS tube switch module is prevented from being too high through the first voltage-regulator tube voltage-regulator module, and on the other hand, surge protection is carried out on the first controlled MOS tube switch module; and the second voltage-regulator tube voltage-stabilizing module is used for carrying out surge protection on the second controlled MOS tube switch module.

Description

Technical Field

[0001] This utility model relates to a controlled driving circuit for color mixing of two light sources. Background Technology

[0002] Some existing dual-color lamp dimming and color-adjusting drive circuits, such as Chinese Patent CN220402005U and its specification drawing Figure 5, require the use of a PWM conversion chip to convert one input PWM signal into two complementary PWM signal outputs, and then control the conduction of two controlled switches to dim and adjust the color of the dual-color lamp. In order to reduce the use of PWM conversion chips, the applicant designed the following circuit. Utility Model Content

[0003] This invention overcomes the shortcomings of the above-mentioned technologies and provides a controlled driving circuit for color mixing of two light sources.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A controlled driving circuit for color mixing of two light sources includes a DC voltage input positive terminal 11, a DC voltage input negative terminal 12, a PWM control signal input terminal 13, a first controlled MOSFET switching module 21 for conduction when its switching control signal input terminal is high, a second controlled MOSFET switching module 22 for conduction when its switching control signal input terminal is high, a first Zener diode voltage regulator module 31, a second Zener diode voltage regulator module 32, a pull-up resistor module 33, a DC voltage output positive terminal 40, a first DC voltage output negative terminal 41, and a second DC voltage output negative terminal 42. The DC voltage input positive terminal 11 is connected to one end of the pull-up resistor module 33 and the DC voltage output positive terminal 40, and the DC voltage input negative terminal 12 is connected to the first controlled MOSFET switching module 21. The switch negative terminal, the positive terminal of the first Zener diode voltage regulator module 31, the switch negative terminal of the second controlled MOSFET switch module 22, and the positive terminal of the second Zener diode voltage regulator module 32 are connected to ground. The switch control signal input terminal of the first controlled MOSFET switch module 21 is connected to the PWM control signal input terminal 13. The switch positive terminal of the first controlled MOSFET switch module 21 is connected to the negative terminal of the first Zener diode voltage regulator module 31, the switch control signal input terminal of the second controlled MOSFET switch module 22, the other end of the pull-up resistor module 33, and the first DC voltage output negative terminal 41. The switch positive terminal of the second controlled MOSFET switch module 22 is connected to the negative terminal of the second Zener diode voltage regulator module 32 and the second DC voltage output negative terminal 42.

[0006] Preferably, the first controlled MOSFET switching module 21 includes a resistor R4 and an N-MOSFET Q8. One end of the resistor R4 is connected to the PWM control signal input terminal 13 as the switching control signal input terminal of the first controlled MOSFET switching module 21. The other end of the resistor R4 is connected to the gate (g) terminal of the N-MOSFET Q8. The drain (d) terminal of the N-MOSFET Q8 is connected to the positive terminal of the first controlled MOSFET switching module 21.

[0007] Preferably, the first Zener diode voltage regulator module 31 includes a Zener diode TVS1, the positive terminal of the Zener diode TVS1 serves as the positive terminal of the first Zener diode voltage regulator module 31, and the negative terminal of the Zener diode TVS1 serves as the negative terminal of the first Zener diode voltage regulator module 31.

[0008] Preferably, the second controlled MOS transistor switching module 22 includes an N-MOS transistor Q9, wherein the gate (g) terminal of the N-MOS transistor Q9 serves as the switch control signal input terminal of the second controlled MOS transistor switching module 22, the source (s) terminal of the N-MOS transistor Q9 serves as the switch negative terminal of the second controlled MOS transistor switching module 22, and the drain (d) terminal of the N-MOS transistor Q9 serves as the switch positive terminal of the second controlled MOS transistor switching module 22.

[0009] Preferably, the second Zener diode voltage regulator module 32 includes a Zener diode TVS2, the positive terminal of the Zener diode TVS2 is used as the positive terminal of the second Zener diode voltage regulator module 32, and the negative terminal of the Zener diode TVS2 is used as the negative terminal of the second Zener diode voltage regulator module 32.

[0010] Preferably, the pull-up resistor module 33 includes a resistor R27, one end of the resistor R27 is one end of the pull-up resistor module 33, and the other end of the resistor R27 is the other end of the pull-up resistor module 33.

[0011] Preferably, the circuit further includes a forward diode module 51 and a polarized capacitor module 52. The positive terminal 11 of the DC voltage input is connected to the negative terminal of the forward diode module 51 and the positive terminal of the polarized capacitor module 52. The negative terminal of the polarized capacitor module 52 is connected to the negative terminal 12 of the DC voltage input. The positive terminal of the forward diode module 51 and the negative terminal 12 of the DC voltage input are used to input DC voltage.

[0012] Preferably, the forward diode module 51 includes a forward diode D17, the positive terminal of the forward diode D17 serves as the positive terminal of the forward diode module 51, and the negative terminal serves as the negative terminal of the forward diode module 51. The polarized capacitor module 52 includes a polarized capacitor C3 and a capacitor C23, the positive terminal of the polarized capacitor C3 is connected to one end of the capacitor C23 to serve as the positive terminal of the polarized capacitor module 52, and the negative terminal of the polarized capacitor C3 is connected to the other end of the capacitor C23 to serve as the negative terminal of the polarized capacitor module 52.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This design features a simple and easy-to-implement structure. By complementaryly connecting two controlled MOSFET switching modules, one is turned on while the other is turned off. This allows for the complementary power supply of the dual-color lamps via a single PWM signal input, achieving dual-color lamp dimming and color adjustment. It eliminates the need for a PWM conversion chip, making it highly practical. Furthermore, the first Zener diode voltage regulator module and the pull-up resistor module serve two purposes: firstly, when the first controlled MOSFET switching module is turned off, the positive terminal of the DC voltage output supplies power to the second controlled MOSFET switching module through the pull-up resistor module; secondly, the first Zener diode voltage regulator module prevents excessive voltage at the input of the second controlled MOSFET switching module's switching control signal; and thirdly, it provides surge protection for the first controlled MOSFET switching module. The second Zener diode voltage regulator module also provides surge protection for the second controlled MOSFET switching module, further enhancing its practicality.

[0015] 2. The arrangement of the forward diode module and polarized capacitor module described in this case can ensure that the input between the positive terminal of the DC voltage input and the negative terminal of the DC voltage input is a positive DC voltage, which is practical. Attached Figure Description

[0016] Figure 1 This is the circuit diagram for this case. Numbers 61 and 62 in the diagram represent light sources of different colors. Detailed Implementation

[0017] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art:

[0018] like Figure 1As shown, a controlled driving circuit for color mixing of two light sources includes a DC voltage input positive terminal 11, a DC voltage input negative terminal 12, a PWM control signal input terminal 13, a first controlled MOSFET switching module 21 for conduction when its switching control signal input terminal is high, a second controlled MOSFET switching module 22 for conduction when its switching control signal input terminal is high, a first Zener diode voltage regulator module 31, a second Zener diode voltage regulator module 32, a pull-up resistor module 33, a DC voltage output positive terminal 40, a first DC voltage output negative terminal 41, and a second DC voltage output negative terminal 42. The DC voltage input positive terminal 11 is connected to one end of the pull-up resistor module 33 and the DC voltage output positive terminal 40, and the DC voltage input negative terminal 12 is connected to the first controlled MOSFET switching module 23. The negative terminal of switch 21, the positive terminal of the first Zener diode voltage regulator module 31, the negative terminal of switch 22, and the positive terminal of the second Zener diode voltage regulator module 32 are connected to ground. The switch control signal input terminal of the first Zener diode voltage regulator module 21 is connected to the PWM control signal input terminal 13. The positive terminal of switch 21 is connected to the negative terminal of the first Zener diode voltage regulator module 31, the switch control signal input terminal of the second Zener diode voltage regulator module 22, the other end of the pull-up resistor module 33, and the negative terminal of the first DC voltage output 41. The positive terminal of switch 22 is connected to the negative terminal of the second Zener diode voltage regulator module 32 and the negative terminal of the second DC voltage output 42.

[0019] As described above, in specific implementation, the DC voltage output positive terminal 40 and the first DC voltage output negative terminal 41 are used to connect the first color light source 61, and the DC voltage output positive terminal 40 and the second DC voltage output negative terminal 42 are used to connect the second color light source 62.

[0020] The working principle of this case is as follows: When the PWM control signal input connection terminal 13 is high, the first controlled MOSFET switching module 21 is turned on. On the one hand, the first DC voltage output negative connection terminal 41 is connected to the DC voltage input negative connection terminal 12 through the first controlled MOSFET switching module 21, and the DC voltage output positive connection terminal 40 is energized with the first DC voltage output negative connection terminal 41 to drive the first color light source 61 to work. On the other hand, the switching control signal input terminal of the second controlled MOSFET switching module 22 is grounded through the first controlled MOSFET switching module 21, the second DC voltage output negative connection terminal 42 is not turned on, and the second color light source 62 is not energized. When the PWM control signal input connection terminal 13 is low, the first controlled MOSFET switching module 21 is not turned on, the first color light source 61 is not energized, and the DC voltage output negative connection terminal 40 is not energized. The positive voltage output terminal 40 supplies power to the switching control signal input terminal of the second controlled MOSFET switching module 22 through the pull-up resistor module 33, turning on the second controlled MOSFET switching module 22. Thus, the negative DC voltage output terminal 42 is connected to the negative DC voltage input terminal 12 through the second controlled MOSFET switching module 22. Power is supplied between the positive DC voltage output terminal 40 and the negative DC voltage output terminal 42, driving the second color light source 62 to operate. Therefore, when a PWM signal is input to the PWM control signal input terminal 13, the dual-color lamp dimming and color-adjusting function can be achieved. When the brightness of the first color light source 61 gradually increases, the brightness of the corresponding second color light source 62 gradually decreases; conversely, when the brightness of the first color light source 61 gradually decreases, the brightness of the corresponding second color light source 62 gradually increases, thereby driving the dual-color lamp to mix the desired color temperature.

[0021] As described above, the structure of this invention is simple and easy to implement. By complementaryly connecting two controlled MOSFET switching modules, one is turned on while the other is turned off. This allows for the complementary power supply of the dual-color lamps via a single PWM signal input, achieving the effect of dimming and color adjustment for the dual-color lamps. This eliminates the need for a PWM conversion chip, making it highly practical. Furthermore, the functions of the first Zener diode voltage regulator module 31 and the pull-up resistor module 33 are as follows: Firstly, when the first controlled MOSFET switching module 21 is turned off, the positive terminal 40 of the DC voltage output supplies power to the second controlled MOSFET switching module 22 through the pull-up resistor module 33. The first Zener diode voltage regulator module 31 also prevents the voltage at the switching control signal input terminal of the second controlled MOSFET switching module 22 from becoming too high. Secondly, it provides surge protection for the first controlled MOSFET switching module 21, making it highly practical. The second Zener diode voltage regulator module 32 also provides surge protection for the second controlled MOSFET switching module 22, making it highly practical.

[0022] As described above, in a specific implementation, the first controlled MOS transistor switching module 21 includes a resistor R4 and an N-MOS transistor Q8. One end of the resistor R4 serves as the switch control signal input terminal of the first controlled MOS transistor switching module 21 and is connected to the PWM control signal input connection terminal 13. The other end of the resistor R4 is connected to the gate (g) terminal of the N-MOS transistor Q8. The drain (d) terminal of the N-MOS transistor Q8 serves as the positive terminal of the switch of the first controlled MOS transistor switching module 21, which is convenient to implement.

[0023] As described above, in a specific implementation, the first Zener diode voltage regulator module 31 includes a Zener diode TVS1. The positive terminal of the Zener diode TVS1 serves as the positive terminal of the first Zener diode voltage regulator module 31, and the negative terminal of the Zener diode TVS1 serves as the negative terminal of the first Zener diode voltage regulator module 31, which is convenient to implement.

[0024] As described above, in a specific implementation, the second controlled MOS transistor switching module 22 includes an N-MOS transistor Q9. The gate (g) terminal of the N-MOS transistor Q9 serves as the switch control signal input terminal of the second controlled MOS transistor switching module 22, the source (s) terminal of the N-MOS transistor Q9 serves as the switch negative terminal of the second controlled MOS transistor switching module 22, and the drain (d) terminal of the N-MOS transistor Q9 serves as the switch positive terminal of the second controlled MOS transistor switching module 22. This implementation is convenient.

[0025] As described above, in a specific implementation, the second Zener diode voltage regulator module 32 includes a Zener diode TVS2. The positive terminal of the Zener diode TVS2 is used as the positive terminal of the second Zener diode voltage regulator module 32, and the negative terminal of the Zener diode TVS2 is used as the negative terminal of the second Zener diode voltage regulator module 32, which is convenient to implement.

[0026] As described above, in a specific implementation, the pull-up resistor module 33 includes a resistor R27, one end of the resistor R27 is one end of the pull-up resistor module 33, and the other end of the resistor R27 is the other end of the pull-up resistor module 33, which is convenient to implement.

[0027] As described above, in a specific implementation, the circuit further includes a forward diode module 51 and a polarized capacitor module 52. The positive terminal 11 of the DC voltage input is connected to the negative terminal of the forward diode module 51 and the positive terminal of the polarized capacitor module 52. The negative terminal of the polarized capacitor module 52 is connected to the negative terminal 12 of the DC voltage input. The positive terminal of the forward diode module 51 and the negative terminal 12 of the DC voltage input are used to input DC voltage.

[0028] As described above, the arrangement of the forward diode module 51 and the polarized capacitor module 52 in this case can ensure that the input between the positive DC voltage input terminal 11 and the negative DC voltage input terminal 12 is a positive DC voltage, which is practical.

[0029] As described above, in a specific implementation, the forward diode module 51 includes a forward diode D17. The positive terminal of the forward diode D17 serves as the positive terminal of the forward diode module 51, and the negative terminal serves as the negative terminal of the forward diode module 51. The polarized capacitor module 52 includes a polarized capacitor C3 and a capacitor C23. The positive terminal of the polarized capacitor C3 is connected to one end of the capacitor C23 to serve as the positive terminal of the polarized capacitor module 52, and the negative terminal of the polarized capacitor C3 is connected to the other end of the capacitor C23 to serve as the negative terminal of the polarized capacitor module 52. This implementation is convenient.

[0030] As stated above, this case protects a controlled driving circuit for mixing colors from two light sources, and all technical solutions with the same or similar structure as this case should be considered to fall within the protection scope of this case.

Claims

1. A controlled drive circuit for two light source color mixing, characterized by The application relates to a DC voltage input positive electrode connecting end (11), a DC voltage input negative electrode connecting end (12), a PWM control signal input connecting end (13), a first controlled MOS tube switch module (21) used for turning on when a high level is input in a switch control signal input end thereof, a second controlled MOS tube switch module (22) used for turning on when a high level is input in a switch control signal input end thereof, a first stabilizing tube stabilizing module (31), a second stabilizing tube stabilizing module (32), an upper pull resistance module (33), a DC voltage output positive electrode connecting end (40), a first DC voltage output negative electrode connecting end (41), a second DC voltage output negative electrode connecting end (42), the DC voltage input positive electrode connecting end (11) is connected with one end of the upper pull resistance module (33) and the DC voltage output positive electrode connecting end (40), the DC voltage input negative electrode connecting end (12) is connected with a switch negative electrode connecting end of the first controlled MOS tube switch module (21), a positive electrode connecting end of the first stabilizing tube stabilizing module (31), a switch negative electrode connecting end of the second controlled MOS tube switch module (22), a positive electrode connecting end of the second stabilizing tube stabilizing module (32) and then grounded, a switch control signal input end of the first controlled MOS tube switch module (21) is connected with the PWM control signal input connecting end (13), a switch positive electrode connecting end of the first controlled MOS tube switch module (21) is connected with a negative electrode connecting end of the first stabilizing tube stabilizing module (31), a switch control signal input end of the second controlled MOS tube switch module (22), the other end of the upper pull resistance module (33), the first DC voltage output negative electrode connecting end (41), a switch positive electrode connecting end of the second controlled MOS tube switch module (22) is connected with a negative electrode connecting end of the second stabilizing tube stabilizing module (32) and the second DC voltage output negative electrode connecting end (42).

2. A controlled drive circuit for two light source color mixing as defined in claim 1, characterized in that The first controlled MOS tube switch module (21) comprises a resistance R4 and an N-MOS tube Q8, one end of the resistance R4 is connected with the PWM control signal input connecting end (13) as a switch control signal input end of the first controlled MOS tube switch module (21), the other end of the resistance R4 is connected with a g pole of the N-MOS tube Q8, a d pole of the N-MOS tube Q8 is a switch positive electrode connecting end of the first controlled MOS tube switch module (21).

3. A controlled drive circuit for two light source color mixing as defined in claim 1, wherein The first stabilizing tube stabilizing module (31) comprises a stabilizing tube TVS1, a positive electrode connecting end of the stabilizing tube TVS1 is a positive electrode connecting end of the first stabilizing tube stabilizing module (31), and a negative electrode connecting end of the stabilizing tube TVS1 is a negative electrode connecting end of the first stabilizing tube stabilizing module (31).

4. A controlled drive circuit for two light source color mixing as defined in claim 1, wherein The second controlled MOS tube switch module (22) comprises an N-MOS tube Q9, the g pole of the N-MOS tube Q9 is the switch control signal input end of the second controlled MOS tube switch module (22), the s pole of the N-MOS tube Q9 is the switch negative connection end of the second controlled MOS tube switch module (22), and the d pole of the N-MOS tube Q9 is the switch positive connection end of the second controlled MOS tube switch module (22).

5. A controlled drive circuit for two light source color mixing as defined in claim 1, wherein The second voltage stabilizing tube voltage stabilizing module (32) comprises a voltage stabilizing tube TVS2, the positive connection end of the voltage stabilizing tube TVS2 is the positive connection end of the second voltage stabilizing tube voltage stabilizing module (32), and the negative connection end of the voltage stabilizing tube TVS2 is the negative connection end of the second voltage stabilizing tube voltage stabilizing module (32).

6. A controlled drive circuit for two light source color mixing as defined in claim 1, wherein The pull-up resistance module (33) comprises a resistance R27, one end of the resistance R27 is one end of the pull-up resistance module (33), and the other end of the resistance R27 is the other end of the pull-up resistance module (33).

7. A controlled drive circuit for two light source color mixing as claimed in any of claims 1-6, characterized in that Further comprising a forward diode module (51) and a polarity capacitor module (52), the direct current voltage input positive connection end (11) is connected with the negative connection end of the forward diode module (51) and the positive connection end of the polarity capacitor module (52), the negative connection end of the polarity capacitor module (52) is connected with the direct current voltage input negative connection end (12), and the positive connection end of the forward diode module (51) is used for inputting direct current voltage with the direct current voltage input negative connection end (12).

8. A controlled drive circuit for two light source color mixing as defined in claim 7, characterized in that The forward diode module (51) comprises a forward diode D17, the positive connection end of the forward diode D17 is the positive connection end of the forward diode module (51), and the negative connection end is the negative connection end of the forward diode module (51), the polarity capacitor module (52) comprises a polarity capacitor C3 and a capacitor C23, the positive connection end of the polarity capacitor C3 is connected with one end of the capacitor C23 and then serves as the positive connection end of the polarity capacitor module (52), and the negative connection end of the polarity capacitor C3 is connected with the other end of the capacitor C23 and then serves as the negative connection end of the polarity capacitor module (52).

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