A dimming signal encoder, a dimming system and a track lighting system

Abstract

The present application relates to the technical field of LED lighting, and discloses a dimming signal encoder, a dimming system and a track lighting system, the dimming signal encoder comprising: a first power supply processing module, a dimming signal detection module, an output control module and an encoded signal output module, wherein the first power supply processing module is used for converting an external power supply voltage into voltage levels required by the dimming signal detection module and the output control module respectively; the dimming signal detection module is used for switching a switch state based on the size of the power supply voltage, and outputting a brightness encoded signal and a color temperature encoded signal based on the dimming signal respectively; the output control module is used for outputting a PWM encoded signal based on the brightness encoded signal and the color temperature encoded signal; and the encoded signal output module is used for adjusting the level of the output voltage based on the PWM encoded signal, so as to adjust the brightness and the color temperature of the lamp. The present application can adjust the brightness of the track lamp while being compatible with color temperature adjustment, thereby improving user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of LED lighting, and in particular to a dimming signal encoder, a dimming system and a track lighting system. Background Art

[0002] Track lighting fixtures contain conductive metal strips on both sides of the track, and there are rotatable conductive copper sheets at the joints of the track lights. During installation, the conductive copper sheets on the track lights touch the conductive metal strips inside the track to power the track lights. In traditional low-voltage track 0-10V dimming systems, after receiving the 0-10V dimming signal, the low-voltage track connector adjusts the output PWM wave to directly dim or adjust the color temperature of the connected lamps. The existing low-voltage track 0-10V dimming system has the following main problems:

[0003] 1. The same track can only be dimmed by one circuit and cannot be divided into two or even multiple circuits for dimming.

[0004] 2. It can only adjust the brightness of the lamp, but is not compatible with adjusting the color temperature.

[0005] 3. When installing lamps into low-voltage tracks, the positive and negative directions of the 0-10V signal lines must be aligned. If they are installed in reverse, they cannot be debugged normally, which is not conducive to actual application debugging.

[0006] Connecting the 4.0-10V signal line to the constant voltage drive power supply will damage the lamp and is not conducive to on-site construction wiring. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to solve the problem in the prior art that the dimming signal encoder cannot output the color temperature adjustment signal and the brightness adjustment signal at the same time, thereby providing a dimming signal encoder, a dimming system and a track lighting system.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] In a first aspect, the present application provides a dimming signal encoder, comprising: a first power supply processing module, a dimming signal detection module, an output control module, and an encoded signal output module, wherein the power supply end of the first power supply processing module is connected with an external power supply, the first output end of the first power supply processing module is connected with the power supply end of the output control module, the second output end of the first power supply processing module is connected with the power supply end of the dimming signal detection module, and the first power supply processing module is used to convert the voltage of the external power supply into the voltage level required by the dimming signal detection module and the output control module, respectively; the input end of the dimming signal detection module inputs a dimming signal, the first output end and the second output end of the dimming signal detection module are connected with the first detection end and the second detection end of the output control module, respectively, the dimming signal detection module is used to switch the switch state based on the size of the power supply voltage, and output a brightness encoded signal and a color temperature encoded signal based on the dimming signal, respectively; the output end of the output control module is connected with the input end of the encoded signal output module, the output control module is used to output a PWM encoded signal based on the brightness encoded signal and the color temperature encoded signal; and the output end of the encoded signal output module is connected with the control end of a lamp, and the encoded signal output module is used to adjust the level of the output voltage based on the PWM encoded signal, so as to adjust the brightness and the color temperature of the lamp.

[0010] The dimming signal encoder provided by the present application can generate a brightness encoded signal and a color temperature encoded signal according to a dimming signal, and then convert the brightness encoded signal and the color temperature encoded signal into a PWM encoded signal through an output control module, and then adjust the brightness and the color temperature of a lamp based on the PWM encoded signal through an encoded signal output module, so that the brightness and the color temperature of the lamp are adjusted simultaneously according to one dimming signal, and the brightness adjustment and the color temperature adjustment are integrated into one dimming signal encoder, so that the lamp adjustment operation is flexible and convenient, and the user experience is improved.

[0011] In an optional embodiment, the dimming signal comprises a brightness signal and a color temperature signal, and the dimming signal detection module comprises: a brightness signal detection circuit and a color temperature signal detection circuit, wherein the input end of the brightness signal detection circuit inputs the brightness signal, the power supply end of the brightness signal detection circuit is connected with the second output end of the first power supply processing module, the output end of the brightness signal detection circuit is connected with the first detection end of the output control module, the brightness signal detection circuit is used to switch the switch state based on the power supply voltage, so that the internal current is constant, and the brightness signal is divided in voltage and then the brightness encoded signal is output; the input end of the color temperature signal detection circuit inputs the color temperature signal, the power supply end of the color temperature signal detection circuit is connected with the second output end of the first power supply processing module, the output end of the color temperature signal detection circuit is connected with the second detection end of the output control module, and the color temperature signal detection circuit is used to switch the switch state based on the power supply voltage, so that the internal current is constant, and the color temperature signal is divided in voltage and then the color temperature encoded signal is output.

[0012] In an alternative embodiment, the encoding signal output module comprises: an output circuit and a protection circuit, wherein the input end of the output circuit is connected with the output end of the output control module, the output end of the output circuit is connected with the control end of the lamp, and the first end and the second end of the output circuit are respectively connected with the first end and the second end of the protection circuit; when the PWM encoding signal is the first level, the output circuit is turned on so that the voltage of the control end of the lamp is reduced; when the PWM encoding signal is the second level, the output circuit is turned off so that the voltage of the control end of the lamp remains unchanged; when the voltage of the control end of the lamp is greater than the threshold voltage, the protection circuit switches the switch state, the output circuit switches the switch state, so that the voltage of the control end of the lamp remains unchanged.

[0013] In an alternative embodiment, the output circuit comprises: a first switch circuit and a second switch circuit, wherein the input end of the first switch circuit is connected with the output end of the output control module, the first end and the second end of the first switch circuit are respectively connected with the first end and the second end of the second switch circuit, and the third end of the first switch circuit is connected with the second end of the protection circuit; the third end of the second switch circuit is connected with the first end of the protection circuit, and the fourth end of the second switch circuit is connected with the control end of the lamp; when the PWM encoding signal is the first level, the second switch circuit is turned on so that the voltage of the control end of the lamp is reduced; when the PWM encoding signal is the second level, the second switch circuit is turned off so that the voltage of the control end of the lamp remains unchanged; when the voltage of the control end of the lamp is greater than the threshold voltage, the protection circuit switches the switch state, the first switch circuit is turned on, and the second switch circuit is turned off, so that the voltage of the control end of the lamp remains unchanged.

[0014] In a second aspect, the present application provides a dimming system, comprising: a second power processing module, an encoded signal input module, a loop dial switch module, an input control module, a DCDC driving module, and the dimming signal encoder of the first aspect, wherein the input end of the second power processing module is connected with the output end of the encoded signal output module, the output end of the second power processing module is connected with the power supply end of the input control module, and the second power processing module is used to convert the output voltage of the encoded signal output module into the voltage level required by the input control module; the input end of the encoded signal input module is connected with the output end of the encoded signal output module, the output end of the encoded signal input module is connected with the first input end of the input control module, and the encoded signal input module is used to switch the switch state based on the output voltage of the encoded signal output module, so as to switch the level state of the output signal; the output end of the input control module is connected with the input end of the DCDC driving module, and the input control module is used to output the brightness adjustment signal and the color temperature adjustment signal after decoding the output signal of the encoded signal input module; the power supply end of the DCDC driving module is connected with an external power supply, the first output end of the DCDC driving module is connected with the brightness control end of the lamp, and the second output end of the DCDC driving module is connected with the color temperature control end of the lamp, and the DCDC driving module is used to switch the switch state based on the brightness adjustment signal and the color temperature adjustment signal, so as to adjust the brightness and the color temperature of the lamp.

[0015] The dimming system provided by the present application comprises a decoding system composed of a second power processing module, an encoded signal input module, a loop dial switch module, an input control module, and a DCDC driving module. The encoded signal input module can switch the output level according to the output voltage of the encoded signal output module. The input control module decodes the output signal according to the level and then outputs the brightness adjustment signal and the color temperature adjustment signal. The DCDC driving module adjusts the brightness and the color temperature of the lamp according to the brightness adjustment signal and the color temperature adjustment signal. The dimming operation of the lamp is flexible and convenient, and the user experience is improved.

[0016] In an optional embodiment, the DCDC driving module comprises: a brightness driving module and a color temperature driving module, wherein the first output end of the input control module outputs the brightness adjustment signal, and the second output end of the input control module outputs the color temperature adjustment signal; the input end of the brightness driving module is connected with the first output end of the input control module, the output end of the brightness driving module is connected with the brightness control end of the lamp, the power supply end of the brightness driving module is connected with an external power supply, and the brightness driving module is used to switch the switch state based on the brightness adjustment signal, so as to adjust the brightness of the lamp; the input end of the color temperature driving module is connected with the second output end of the input control module, the output end of the color temperature driving module is connected with the color temperature control end of the lamp, the power supply end of the color temperature driving module is connected with the first end of the brightness driving module, and the color temperature driving module is used to switch the switch state based on the color temperature adjustment signal, so as to adjust the color temperature of the lamp.

[0017] The dimming system, the brightness driving module and the color temperature driving module are independently arranged, the brightness driving module can be controlled to work to adjust the brightness for the single-color lamp, the brightness driving module and the color temperature driving module can be controlled to work simultaneously for the multi-color lamp, the brightness of the lamp is adjusted based on the brightness adjustment signal or the color temperature of the lamp is adjusted based on the color temperature adjustment signal, the two circuits work independently without interference, the reliability is high, and the total power consumption of the circuit is reduced.

[0018] In an alternative embodiment, the brightness driving module comprises a power conversion unit, a first control unit, a third switch circuit, a first adjustment unit and a first detection unit, wherein the input end of the power conversion unit is connected with an external power supply, the output end of the power conversion unit is connected with the first end of the first adjustment unit and the power supply end of the color temperature driving module, the power conversion unit is used to convert the voltage level of the external power supply; the second end and the third end of the first adjustment unit are respectively connected with the first end and the second end of the first control unit, the second end of the first adjustment unit is also connected with the first end of the third switch circuit, the fourth end of the first adjustment unit is connected with the positive end of the brightness control end of the lamp, the fifth end of the first adjustment unit is connected with the negative end of the brightness control end of the lamp, the second end of the third switch circuit and the first end of the first detection unit; the input end of the first control unit is connected with the first output end of the input control module, the output end of the first control unit is connected with the control end of the third switch circuit, the first control unit is used to output the brightness PWM signal based on the brightness adjustment signal; the second end of the first detection unit is connected with the first detection end of the input control module; the third switch circuit is used to switch the on-off state based on the brightness PWM signal, so as to output the brightness current signal, and then adjust the resistance value of the resistor in the first adjustment unit to adjust the current size of the brightness control end of the lamp; the input control module detects the real-time brightness of the lamp based on the current size and the voltage size of the second end of the first detection unit.

[0019] In an alternative embodiment, the color temperature driving module comprises: a second control unit, a fourth switch circuit, a second adjusting unit and a second detecting unit, wherein the first end of the second adjusting unit is connected with the first end of the brightness driving module, the second end and the third end of the second adjusting unit are respectively connected with the first end and the second end of the second control unit, the second end of the second adjusting unit is also connected with the first end of the fourth switch circuit, the fourth end of the second adjusting unit is connected with the positive end of the color temperature control end of the lamp, and the fifth end of the second adjusting unit is connected with the negative end of the color temperature control end of the lamp, the second end of the fourth switch circuit and the first end of the second detecting unit; the input end of the second control unit is connected with the second output end of the input control module, the output end of the second control unit is connected with the control end of the fourth switch circuit, and the second control unit is used for outputting a color temperature PWM signal based on a color temperature adjusting signal; the second end of the second detecting unit is connected with the second detecting end of the input control module; the fourth switch circuit is used for switching the on-off state based on the color temperature PWM signal, so that after outputting the color temperature current signal, the size of the current of the color temperature control end of the lamp is adjusted by adjusting the resistance value of the resistor in the second adjusting unit; and the input control module detects the real-time color temperature of the lamp based on the current size and the voltage size of the second end of the second detecting unit.

[0020] The dimming system provided by the application can detect the real-time brightness and real-time color temperature of the lamp, and improve the reliability of lamp control.

[0021] In an alternative embodiment, the input control module is also connected with a loop dial switch module, the output end of the loop dial switch module is connected with the third detecting end of the input control module, and the loop dial switch module is used for manually starting the brightness adjusting function and the color temperature adjusting function of the lamp; the first detecting end and the second detecting end of the input control module are respectively connected with the first end and the second end of the DCDC driving module, and the input control module is used for checking the working state of the lamp based on the switch state of the loop dial switch module and in combination with the brightness and color temperature of the lamp.

[0022] In a third aspect, the application provides a track lighting system, comprising: a constant voltage source, a lamp module, a track and the dimming system of the second aspect, wherein the output end of the constant voltage source is connected with the metal strip on the inner side of the track, and the output end of the constant voltage source is also connected with the power supply end of the first power processing module and the power supply end of the DCDC driving module; the lamp module is installed in the track, and the conductive end of the lamp module is connected with the metal strip on the inner side of the track.

[0023] The track lighting system provided by the application can simultaneously adjust the brightness and color temperature of the multiple lamps in the lamp module in the track by using the dimming system, so that the lamp adjusting operation is flexible and convenient, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the specific embodiment of the present application or the technical solution in the prior art clearer, the drawings needed in the description of the specific embodiment or the prior art will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0025] Figure 1 is a block diagram of one specific example of the dimming signal encoder according to the embodiment of the present application;

[0026] Figure 2 is a block diagram of one specific circuit of the first power processing module according to the embodiment of the present application;

[0027] Figure 3 is a block diagram of one specific circuit of the dimming signal detection module according to the embodiment of the present application;

[0028] Figure 4 is a block diagram of one specific circuit of the output control module according to the embodiment of the present application;

[0029] Figure 5 is a block diagram of one specific circuit of the encoded signal output module according to the embodiment of the present application;

[0030] Figure 6 is a block diagram of one specific example of the dimming system according to the embodiment of the present application;

[0031] Figure 7 is a block diagram of one specific example of the DCDC drive module according to the embodiment of the present application;

[0032] Figure 8 is a block diagram of one specific circuit of the brightness drive module according to the embodiment of the present application;

[0033] Figure 9 is a block diagram of one specific circuit of the color temperature drive module according to the embodiment of the present application;

[0034] Figure 10 is a block diagram of one specific circuit of the encoded signal input module according to the embodiment of the present application;

[0035] Figure 11 is a block diagram of one specific circuit of the second power processing module according to the embodiment of the present application;

[0036] Figure 12 is a block diagram of one specific circuit of the input control module according to the embodiment of the present application;

[0037] Figure 13is a block diagram of another specific example of a dimming system according to an embodiment of the present application;

[0038] Figure 14 is a structure diagram of a specific circuit of a loop dial switch according to an embodiment of the present application;

[0039] Figure 15 is a block diagram of a specific example of a track lighting system according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0044] The present embodiment provides a dimming signal encoder, as shown in the figure, comprising: a first power supply processing module 1, a dimming signal detection module 2, an output control module 3 and an encoded signal output module 4. Figure 1

[0045] Figure 1 ​In the embodiment, the power supply end of the first power supply processing module 1 is connected with an external power supply, the first output end of the first power supply processing module 1 is connected with the power supply end of the output control module 3, and the second output end of the first power supply processing module 1 is connected with the power supply end of the dimming signal detection module 2.

[0046] Specifically, Figure 1 In the embodiment, the first power supply processing module 1 is used for converting the external power supply voltage into voltage levels required by the dimming signal detection module 2 and the output control module 3, which can be a DC-DC conversion module, a level converter or other voltage conversion modules.

[0047] Figure 1 In the embodiment, the input end of the dimming signal detection module 2 inputs a dimming signal, and the first output end and the second output end of the dimming signal detection module 2 are connected with the first detection end and the second detection end of the output control module 3, respectively.

[0048] Specifically, Figure 1 In the embodiment, the dimming signal detection module 2 converts the voltage signal corresponding to the brightness information in the dimming signal into a corresponding brightness encoding signal, and converts the voltage signal corresponding to the color temperature information in the dimming signal into a corresponding color temperature encoding signal, and inputs them to the output control module 3. The dimming signal detection module 2 can also perform overcurrent protection. When the power supply voltage is high, the dimming signal detection module 2 can dynamically adjust the internal current and voltage drop by switching the switch state, so that the output brightness encoding signal and color temperature encoding signal maintain a constant value, avoiding damage to the output control module 3 by large current.

[0049] Figure 1 In the embodiment, the output end of the output control module 3 is connected with the input end of the encoding signal output module 4, and the output control module 3 is used for outputting a PWM encoding signal based on the brightness encoding signal and the color temperature encoding signal; and the output end of the encoding signal output module 4 is connected with the control end of a lamp.

[0050] Specifically, Figure 1 In the embodiment, the output control module 3 converts the received brightness encoding signal and color temperature encoding signal into a PWM encoding signal output after integration, and the output end of the encoding signal output module 4 can be connected with the brightness control end and the color temperature control end of the lamp, respectively. When the PWM encoding signal is high, the encoding signal output module 4 switches the switch state to reduce the output voltage level; when the PWM encoding signal is low, the encoding signal output module 4 switches the switch state to increase the output voltage level. The brightness control end and the color temperature control end of the lamp adjust the brightness and the color temperature based on the input voltage level.

[0051] Exemplarily, Figure 1In the embodiment, the 0-10V voltage received by the brightness control end of the lamp corresponds to the brightness range of 0%-100%, and the 0-10V voltage received by the color temperature control end corresponds to the color temperature range of 2700K-6500K.

[0052] The dimming signal encoder provided by the embodiment can generate a brightness encoding signal and a color temperature encoding signal according to the dimming signal, and the output control module converts the PWM encoding signal, and the encoding signal output module adjusts the brightness and color temperature of the lamp based on the PWM encoding signal. According to one dimming signal, the brightness and color temperature are adjusted at the same time, the brightness adjustment and the color temperature adjustment are integrated into one dimming signal encoder, so that the lamp adjustment operation is flexible and convenient, and the user experience is improved.

[0053] Specifically, Figure 2 In the embodiment, the first power processing module 1 includes a power chip B1, N1 and N2. The first input end of the power chip B1 is connected with an external power supply of 24V / 48V, the second input end is grounded, and the output end outputs a first-level power supply voltage POWER_VCC and is input to N1 and N2 respectively. N1 converts the first-level power supply voltage POWER_VCC into a power supply voltage BUS_VCC of the dimming signal detection module 2, and N2 converts the first-level power supply voltage POWER_VCC into a power supply voltage MCU_VCC of the output control module 3.

[0054] In some optional embodiments, as shown in Figure 3 The dimming signal includes a brightness signal and a color temperature signal, and the dimming signal detection module 2 includes a brightness signal detection circuit 21 and a color temperature signal detection circuit 22. The input end of the brightness signal detection circuit 21 inputs the brightness signal, the power supply end of the brightness signal detection circuit 21 is connected with the second output end of the first power processing module 1, and the output end (i.e. AD1 end) of the brightness signal detection circuit 21 is connected with the first detection end of the output control module 3. The input end of the color temperature signal detection circuit 22 inputs the color temperature signal, the power supply end of the color temperature signal detection circuit 22 is connected with the second output end of the first power processing module 1, and the output end (i.e. AD2 end) of the color temperature signal detection circuit 22 is connected with the second detection end of the output control module 3. The CN1 port receives the brightness signal and the color temperature signal.

[0055] Specifically, Figure 3In the example, the brightness signal detection circuit 21 includes transistors Q1 and Q3, multiple resistors, a capacitor C4, and an anti-reverse diode D1. The Q1 and Q3 transistors form a constant current circuit. When a brightness signal is present, the base of Q1 is low and turns on, while the base of Q3 is high and turns off, causing current to flow through R1 and Q1. When the current corresponding to the supply voltage BUS_VCC is lower than the set value, the voltage drop across R1 falls below the conduction threshold of Q3, causing Q3 to turn off. When the current corresponding to the supply voltage BUS_VCC is greater than the set value, the voltage drop across R1 exceeds the conduction threshold of Q3, causing Q3 to turn on, resulting in a high base level for Q1 and a turn-off for Q1, thereby reducing the current output. This in turn reduces the voltage drop across R1, causing Q3 to turn off and Q1 to turn on, increasing the current. After a period of dynamic equilibrium, Q1's output current reaches a constant value. The brightness signal voltage is divided by R5 and R10 and input to the first detection terminal of the output control module 3 through the AD1 terminal.

[0056] Specifically, Figure 3 In the example, color temperature signal detection circuit 22 includes transistors Q4 and Q6, multiple resistors, capacitor C7, and anti-reverse diode D4. Transistors Q4 and Q6 form a constant current circuit. When a color temperature signal is present, the base of Q4 is low, conducting, and the base of Q6 is high, shutting off, allowing current to flow through R12 and Q4. When the current corresponding to the supply voltage BUS_VCC is lower than the set value, the voltage drop across R1 falls below the conduction threshold of Q6, shutting off Q6. When the current corresponding to the supply voltage BUS_VCC is higher than the set value, the voltage drop across R1 exceeds the conduction threshold of Q6, turning on Q6 and causing the base of Q4 to be high, shutting off Q4 and reducing the current output. This in turn reduces the voltage drop across R1, shutting off Q6 and turning on Q4, increasing the current. After a period of dynamic equilibrium, Q4's output current reaches a constant value. The color temperature signal voltage is divided by R14 and R17, then input to the second detection terminal of the output control module 3 through terminal AD2.

[0057] Specifically, Figure 4 It is an output control module, which consists of chip N3 and peripheral circuits. Its power supply end receives the power supply voltage MCU_VCC, its first detection end and second detection end are respectively connected to the AD1 end of the brightness signal detection circuit 21 and the AD2 end of the color temperature signal detection circuit 22, and its output end outputs the PWM coding signal PWM_TX.

[0058] In some optional embodiments, such as Figure 5 As shown, the coded signal output module 4 includes: an output circuit 41 and a protection circuit 42, wherein the input end of the output circuit 41 is connected to the output end of the output control module 3, the output end of the output circuit 41 is connected to the control end of the lamp, and the first end and the second end of the output circuit 41 are respectively connected to the first end and the second end of the protection circuit 42.

[0059] Specifically, Figure 5 In the output circuit 41, the first switch circuit 411 and the second switch circuit 412 are included, the input end of the first switch circuit 411 is connected with the output end of the output control module 3, the first end and the second end of the first switch circuit 411 are respectively connected with the first end and the second end of the second switch circuit 412, and the third end of the first switch circuit 411 is connected with the second end of the protection circuit 42; the third end of the second switch circuit 412 is connected with the first end of the protection circuit 42, and the fourth end of the second switch circuit 412 is connected with the control end of the lamp.

[0060] Specifically, Figure 5 In the output circuit 41, the first switch circuit 411 and the second switch circuit 412 are included, the input end of the first switch circuit 411 is connected with the output end of the output control module 3, the first end and the second end of the first switch circuit 411 are respectively connected with the first end and the second end of the second switch circuit 412, and the third end of the first switch circuit 411 is connected with the second end of the protection circuit 42; the third end of the second switch circuit 412 is connected with the first end of the protection circuit 42, and the fourth end of the second switch circuit 412 is connected with the control end of the lamp.

[0061] Specifically, Figure 5 In the output circuit 41, the first switch circuit 411 and the second switch circuit 412 are included, the input end of the first switch circuit 411 is connected with the output end of the output control module 3, the first end and the second end of the first switch circuit 411 are respectively connected with the first end and the second end of the second switch circuit 412, and the third end of the first switch circuit 411 is connected with the second end of the protection circuit 42; the third end of the second switch circuit 412 is connected with the first end of the protection circuit 42, and the fourth end of the second switch circuit 412 is connected with the control end of the lamp.

[0062] The embodiment provides a dimming system, which comprises a light source and a light source driver. Figure 6As shown, it includes: a second power processing module 5, a coding signal input module 6, an input control module 7, a DCDC driving module 8 and the dimming signal encoder of the above embodiments and any optional implementation manner thereof, wherein the input end of the second power processing module 5 is connected to the output end of the coding signal output module 4, and the output end of the second power processing module 5 is connected to the power supply end of the input control module 7; the input end of the coding signal input module 6 is connected to the output end of the coding signal output module 4, and the output end of the coding signal input module 6 is connected to the first input end of the input control module 7; the output end of the input control module 7 is connected to the input end of the DCDC driving module 8; the power supply end of the DCDC driving module 8 is connected to the external power supply, the first output end of the DCDC driving module 8 is connected to the brightness control end of the lamp, and the second output end of the DCDC driving module 8 is connected to the color temperature control end of the lamp.

[0063] Specifically, Figure 6 In the embodiment, the second power supply processing module 5 is used to convert the output voltage BUS_VCC of the coding signal output module 4 into the voltage level required by the input control module 7; the coding signal input module 6 is used to switch the switch state based on the output voltage of the coding signal output module 4, thereby switching the level state of the output signal; the input control module 7 is used to decode the output signal of the coding signal input module 6 and output the brightness adjustment signal and the color temperature adjustment signal; the DCDC driving module 8 is used to switch the switch state based on the brightness adjustment signal and the color temperature adjustment signal, thereby adjusting the brightness and color temperature of the lamp.

[0064] Specifically, Figure 6 When the coded signal input module 6 detects that the output voltage BUS_VCC of the coded signal output module 4 decreases, it switches its switch state and outputs a high level. When the coded signal input module 6 detects that the output voltage BUS_VCC of the coded signal output module 4 remains unchanged, it switches its switch state and outputs a low level. The input control module 7 is used to decode the level signal output by the coded signal input module 6 and output a brightness adjustment signal and a color temperature adjustment signal to the DCDC driver module 8, so that the DCDC driver module 8 adjusts the brightness and color temperature of the lamp based on the brightness adjustment signal and the color temperature adjustment signal, respectively.

[0065] It should be noted that the operator can set the high and low states of the level signal according to actual applications, and the specific control logic of the input control module is not limited here.

[0066] The dimming system provided by the embodiment comprises a decoding system composed of a second power processing module, an encoded signal input module, a loop dial switch module, an input control module and a DCDC driving module. The encoded signal input module can switch the output level according to the output voltage of the encoded signal output module. The input control module decodes the output level and outputs a brightness adjustment signal and a color temperature adjustment signal. The DCDC driving module adjusts the brightness and color temperature of the lamp according to the brightness adjustment signal and the color temperature adjustment signal, so that the lamp adjustment operation is flexible and convenient, and the user experience is improved.

[0067] In some optional embodiments, as shown in Figure 7 The DCDC driving module 8 comprises a brightness driving module 81 and a color temperature driving module 82. The first output end of the input control module 7 outputs the brightness adjustment signal, and the second output end of the input control module 7 outputs the color temperature adjustment signal. The input end of the brightness driving module 81 is connected with the first output end of the input control module 7. The output end of the brightness driving module 81 is connected with the brightness control end of the lamp. The power supply end of the brightness driving module 81 is connected with the external power supply. The brightness driving module 81 is used for switching the switch state based on the brightness adjustment signal, so as to adjust the brightness of the lamp. The input end of the color temperature driving module 82 is connected with the second output end of the input control module 7. The output end of the color temperature driving module 82 is connected with the color temperature control end of the lamp. The power supply end of the color temperature driving module 82 is connected with the first end of the brightness driving module 81. The color temperature driving module 82 is used for switching the switch state based on the color temperature adjustment signal, so as to adjust the color temperature of the lamp.

[0068] Specifically, as shown in Figure 8 The brightness driving module 81 comprises a power conversion unit 811, a first control unit 812, a third switch circuit 813, a first adjustment unit 814 and a first detection unit 815.

[0069] Specifically, Figure 8 The input end of the power conversion unit 811 is connected with the external power supply of 24V / 48V. The output end (i.e. the POWER_VCC end) of the power conversion unit 811 is connected with the first end of the first adjustment unit 814 and the power supply end of the color temperature driving module 82. The power conversion unit 811 converts the voltage level of the external power supply voltage of 24V / 48V and outputs the POWER_VCC.

[0070] Specifically, Figure 8In the embodiment, the second and third terminals of the first regulating unit 814 are connected to the first and second terminals of the first control unit 812, respectively. The second terminal of the first regulating unit 814 is also connected to the first terminal of the third switching circuit 813. The fourth terminal of the first regulating unit 814 is connected to the positive terminal (i.e., CW+) of the brightness control terminal of the lamp. The fifth terminal of the first regulating unit 814 is connected to the negative terminal (i.e., CW-) of the brightness control terminal of the lamp, the second terminal of the third switching circuit 813, and the first terminal of the first regulating unit 814. Resistors R30 and R31 are sampling resistors. Adjusting their resistance values ​​can adjust the output current values ​​at the positive terminal (i.e., CW+) and the negative terminal (i.e., CW-) of the brightness control terminal of the lamp.

[0071] Specifically, Figure 8 In the embodiment, the input terminal of the first control unit 812 is connected to the first output terminal (i.e., PORT0 and PORT1) of the input control module 7, and the output terminal of the first control unit 812 is connected to the control terminal of the third switch circuit 813. The first control unit 812 is configured to output a brightness PWM signal based on the brightness adjustment signal. After the N4 chip enable pin (i.e., EN pin) in the first control unit 812 receives the brightness adjustment signal from the input control module 7, it outputs the brightness PWM signal through the DR pin.

[0072] Specifically, Figure 8 In the embodiment, the third switch circuit 813 includes a MOS tube Q20, inductors L3 and L4. After Q20 is turned on based on the brightness PWM signal, the output brightness current signal is input to the brightness control terminal of the lamp after the current interference is suppressed by the inductors L3 and L4.

[0073] Specifically, Figure 8 In the embodiment, the second end of the first detection unit 815 (ie, the PORT4 end) is connected to the first detection end of the input control module 7, and the input control module 7 can detect the real-time brightness of the lamp based on the current and voltage at the second end of the first detection unit 815.

[0074] In some optional embodiments, such as Figure 9 As shown, the color temperature driving module 82 includes: a second control unit 821 , a fourth switch circuit 822 , a second adjustment unit 823 and a second detection unit 824 .

[0075] Specifically, Figure 9In the embodiment, the first end of the second adjusting unit 823 (i.e., the POWER_VCC end) is connected with the first end of the brightness driving module 81, the second end and the third end of the second adjusting unit 823 are respectively connected with the first end and the second end of the second control unit 821, the second end of the second adjusting unit 823 is further connected with the first end of the fourth switch circuit 822, the fourth end of the second adjusting unit 823 is connected with the positive end (i.e., the WW+ end) of the color temperature control end of the lamp, and the fifth end of the second adjusting unit 823 is connected with the negative end (i.e., the WW- end) of the color temperature control end of the lamp, the second end of the fourth switch circuit 822 and the first end of the second detecting unit 824. The resistors R40 and R41 are sampling resistors, and the output current values of the positive end (i.e., the WW+ end) of the color temperature control end of the lamp and the negative end (i.e., the WW- end) of the color temperature control end of the lamp can be adjusted by adjusting the resistance values of the resistors R40 and R41.

[0076] Specifically, Figure 9 In the embodiment, the input end of the second control unit 821 is connected with the second output end (i.e., the PORT2 and PORT3 ends) of the input control module 7, the output end of the second control unit 821 is connected with the control end of the fourth switch circuit 822, and the second control unit 821 is configured to output a color temperature PWM signal based on a color temperature adjusting signal. After the N5 chip enable pin (i.e., the EN pin) of the second control unit 821 receives the color temperature adjusting signal of the input control module 7, the second control unit 821 outputs the color temperature PWM signal through the DR pin.

[0077] Specifically, Figure 9 In the embodiment, the fourth switch circuit 822 includes a MOS tube Q21, inductors L5 and L6. After the Q21 is turned on based on the color temperature PWM signal, the color temperature current signal is input to the color temperature control end of the lamp after the color temperature current signal is inhibited by the inductors L5 and L6 to suppress current interference.

[0078] Specifically, Figure 9 In the embodiment, the second end (i.e., the PORT5 end) of the second detecting unit 824 is connected with the second detecting end of the input control module 7, and the input control module 7 can detect the real-time color temperature of the lamp based on the current size and the voltage size of the second end of the second detecting unit 824.

[0079] Specifically, Figure 10 In the embodiment, the encoding signal input module 6 includes transistors Q15, Q16, Q17, Q18 and Q19. The Q15, Q16, Q17 and Q18 play a role of current stabilization by switching the switch state, so as to avoid damage to the subsequent circuit caused by large current fluctuation in the BUS_VCC. When the BUS_VCC is pulled low, the Q19 is turned off, and the PWM_RX end outputs a high level. When the BUS_VCC is not pulled low, the Q2 is turned on, and the PWM_RX end outputs a low level.

[0080] Specifically, Figure 11In the specific embodiment, the second power supply processing module 5 comprises a power supply chip N5 and a filter capacitor, and the input end of the power supply chip N5 receives the BUS_VCC, and the output end outputs the MCU_VCC for the input control module 7.

[0081] Specifically, Figure 12 The input control module 7 is composed of a chip N6 and a peripheral circuit, the power supply end of which receives the MCU_VCC, the input end of which receives the output signal PWM_RX of the encoding signal input module 6, and the brightness adjustment signal and the color temperature adjustment signal are outputted through the PORT0 and the PORT1 and the PORT2 and the PORT3 after decoding, and the real-time brightness and the real-time color temperature of the lamp are detected through the PORT4 and the PORT5, respectively.

[0082] In some optional embodiments, as shown in Figure 13 The circuit dial switch module 9 is further connected to the third detection end of the input control module 7, and the circuit dial switch module 9 is used to manually open the brightness adjustment function and the color temperature adjustment function of the lamp, and the first detection end and the second detection end of the input control module 7 are connected to the first end and the second end of the DCDC driving module 8, respectively, and the input control module 7 is used to check the working state of the lamp based on the switch state of the circuit dial switch module 9 and the brightness and the color temperature of the lamp.

[0083] Specifically, Figure 14 The specific circuit diagram of the circuit dial switch module 9 can edit four different output states 00, 01, 10 and 11 according to the switch state of S1, and the four different output states are inputted into the input control module 7 through the Addr1 and the Addr2. For example, 00 represents that the lamp does not have the functions of adjusting the brightness and the color temperature, 01 represents that the lamp only has the function of adjusting the color temperature and does not have the function of adjusting the brightness, 10 represents that the lamp only has the function of adjusting the brightness and does not have the function of adjusting the color temperature, and 11 represents that the lamp has both the functions of adjusting the brightness and the color temperature. The input control module 7 first detects the brightness adjustment signal and the color temperature adjustment signal outputted by itself, and then judges whether the lamp has the function of adjusting the brightness or the function of adjusting the color temperature according to the output value of S1. If the functions of the lamp are consistent with the brightness adjustment signal and the color temperature adjustment signal outputted by itself, the DCDC driving module 8 is controlled to adjust the brightness and the color temperature of the lamp.

[0084] Exemplarily, referring to Figure 8 and Figure 9If the lamp is a single-color lamp, when the input control module 7 detects a brightness adjustment signal and, based on the output state of the loop DIP switch module 9, determines that the lamp only has the brightness adjustment function but not the color temperature adjustment function, brightness adjustment is performed; otherwise, brightness adjustment is not performed. The same applies to other lamp circuits, thereby achieving multi-circuit control. If the lamp is a multi-color lamp, when the input control module 7 detects both a brightness adjustment signal and a color temperature adjustment signal and, based on the output state of the loop DIP switch module 9, determines that the lamp has both the brightness adjustment function and the color temperature adjustment function, brightness and color temperature adjustment are performed.

[0085] This embodiment provides a track lighting system, such as Figure 15 As shown, it includes: a constant voltage source 10, a lamp module 11, a track 12 and the dimming system of the above embodiments and any optional implementation methods thereof, wherein the output end of the constant voltage source 10 is connected to the metal strip inside the track 12, and the output end of the constant voltage source 10 is also connected to the power supply end of the first power processing module 1 and the power supply end of the DCDC driver module 8; the lamp module 11 is installed in the track 12, and the conductive end of the lamp module 11 is connected to the metal strip inside the track 12.

[0086] Optionally, Figure 15 In the figure, the lamp module 11 includes a variety of lamps installed in the track 12, and its control end and power supply end are connected to the metal strip inside the track 12. When the lamps are installed in the track 12, there is no need to install them in the uniform direction of positive and negative signal lines; the track 12 is a four-wire low-voltage track.

[0087] It should be noted that the control method and principle of the lamps in the track lighting system in this embodiment are consistent with the contents of the above embodiment and any optional implementation manner thereof, and will not be repeated here.

[0088] The track lighting system provided in this embodiment utilizes a dimming system to simultaneously adjust the brightness and color temperature of multiple lamps in a lamp module within the track, making the lamp adjustment operation flexible and convenient, thereby improving user experience.

[0089] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A dimming system, characterized in that: The dimming signal encoder comprises a first power supply processing module (1), a dimming signal detection module (2), an output control module (3) and a coding signal output module (4), wherein: The power supply end of the first power processing module (1) is connected to an external power supply, the first output end of the first power processing module (1) is connected to the power supply end of the output control module (3), and the second output end of the first power processing module (1) is connected to the power supply end of the dimming signal detection module (2). The first power processing module (1) is used to convert the voltage of the external power supply into the voltage levels required by the dimming signal detection module (2) and the output control module (3). The dimming signal is input to the input end of the dimming signal detection module (2), and the first output end and the second output end of the dimming signal detection module (2) are respectively connected to the first detection end and the second detection end of the output control module (3). The dimming signal detection module (2) is used to switch the switch state based on the size of the power supply voltage, and output a brightness coding signal and a color temperature coding signal based on the dimming signal. The output end of the output control module (3) is connected to the input end of the coded signal output module (4), and the output control module (3) is used to output a PWM coded signal based on the brightness coded signal and the color temperature coded signal; The output end of the coded signal output module (4) is connected to the control end of the lamp, and the coded signal output module (4) is used to adjust the level of the output voltage based on the PWM coded signal, thereby adjusting the brightness and color temperature of the lamp; The dimming system further comprises: a second power processing module (5), a coding signal input module (6), an input control module (7), and a DCDC driving module (8), wherein: The input end of the second power processing module (5) is connected to the output end of the coding signal output module (4), and the output end of the second power processing module (5) is connected to the power supply end of the input control module (7). The second power processing module (5) is used to convert the output voltage of the coding signal output module (4) into the voltage level required by the input control module (7); The input end of the coding signal input module (6) is connected to the output end of the coding signal output module (4), and the output end of the coding signal input module (6) is connected to the first input end of the input control module (7). The coding signal input module (6) is used to switch the switch state based on the output voltage of the coding signal output module (4), thereby switching the level state of the output signal; The output end of the input control module (7) is connected to the input end of the DCDC driving module (8), and the input control module (7) is used to decode the output signal of the coded signal input module (6) and output a brightness adjustment signal and a color temperature adjustment signal; The power supply end of the DCDC driving module (8) is connected to an external power supply, the first output end of the DCDC driving module (8) is connected to a brightness control end of the lamp, and the second output end of the DCDC driving module (8) is connected to a color temperature control end of the lamp. The DCDC driving module (8) is used to switch the switch state based on the brightness adjustment signal and the color temperature adjustment signal, thereby adjusting the brightness and color temperature of the lamp.

2. The dimming system according to claim 1, characterized in that: The dimming signal includes a brightness signal and a color temperature signal, and the dimming signal detection module (2) includes: a brightness signal detection circuit (21) and a color temperature signal detection circuit (22), wherein: The brightness signal is input to the input end of the brightness signal detection circuit (21), the power supply end of the brightness signal detection circuit (21) is connected to the second output end of the first power processing module (1), and the output end of the brightness signal detection circuit (21) is connected to the first detection end of the output control module (3). The brightness signal detection circuit (21) is used to switch the switch state based on the power supply voltage so that the internal current is constant, and output a brightness coding signal after dividing the voltage of the brightness signal; The color temperature signal is input to the input end of the color temperature signal detection circuit (22), the power supply end of the color temperature signal detection circuit (22) is connected to the second output end of the first power processing module (1), and the output end of the color temperature signal detection circuit (22) is connected to the second detection end of the output control module (3). The color temperature signal detection circuit (22) is used to switch the switch state based on the power supply voltage so that the internal current is constant, and output the color temperature coding signal after dividing the voltage of the color temperature signal.

3. The dimming system according to claim 1, wherein: The coded signal output module (4) comprises: an output circuit (41) and a protection circuit (42), wherein: The input end of the output circuit (41) is connected to the output end of the output control module (3), the output end of the output circuit (41) is connected to the control end of the lamp, and the first end and the second end of the output circuit (41) are respectively connected to the first end and the second end of the protection circuit (42); When the PWM coding signal is at a first level, the output circuit (41) is turned on so that the voltage at the control end of the lamp decreases; When the PWM coding signal is at the second level, the output circuit (41) is turned off so that the voltage at the control end of the lamp remains unchanged; When the voltage at the control end of the lamp is greater than a threshold voltage, the protection circuit (42) switches the switch state, and the output circuit (41) switches the switch state, so that the voltage at the control end of the lamp remains unchanged.

4. The dimming system according to claim 3, characterized in that: The output circuit (41) comprises: a first switch circuit (411) and a second switch circuit (412), wherein: The input end of the first switch circuit (411) is connected to the output end of the output control module (3); the first end and the second end of the first switch circuit (411) are respectively connected to the first end and the second end of the second switch circuit (412); and the third end of the first switch circuit (411) is connected to the second end of the protection circuit (42); The third end of the second switch circuit (412) is connected to the first end of the protection circuit (42), and the fourth end of the second switch circuit (412) is connected to the control end of the lamp; When the PWM coding signal is at a first level, the second switch circuit (412) is turned on so that the voltage at the control end of the lamp is reduced; When the PWM coding signal is at a second level, the second switch circuit (412) is turned off so that the voltage at the control end of the lamp remains unchanged; When the voltage at the control end of the lamp is greater than a threshold voltage, the protection circuit (42) switches the switch state, the first switch circuit (411) is turned on, and the second switch circuit (412) is turned off, so that the voltage at the control end of the lamp remains unchanged.

5. The dimming system according to claim 1, wherein: The DCDC driving module (8) comprises: a brightness driving module (81) and a color temperature driving module (82), wherein: The first output end of the input control module (7) outputs the brightness adjustment signal, and the second output end of the input control module (7) outputs the color temperature adjustment signal; The input end of the brightness driving module (81) is connected to the first output end of the input control module (7), the output end of the brightness driving module (81) is connected to the brightness control end of the lamp, the power supply end of the brightness driving module (81) is connected to an external power supply, and the brightness driving module (81) is used to switch the switch state based on the brightness adjustment signal, thereby adjusting the brightness of the lamp; The input end of the color temperature driving module (82) is connected to the second output end of the input control module (7), the output end of the color temperature driving module (82) is connected to the color temperature control end of the lamp, the power supply end of the color temperature driving module (82) is connected to the first end of the brightness driving module (81), and the color temperature driving module (82) is used to switch the switch state based on the color temperature adjustment signal, thereby adjusting the color temperature of the lamp.

6. The dimming system according to claim 5, characterized in that: The brightness driving module (81) comprises: a power conversion unit (811), a first control unit (812), a third switch circuit (813), a first adjustment unit (814) and a first detection unit (815), wherein: The input end of the power conversion unit (811) is connected to an external power source, the output end of the power conversion unit (811) is connected to a first end of the first adjustment unit (814) and a power supply end of the color temperature driving module (82), and the power conversion unit (811) is used to convert the voltage level of the external power source; The second end and the third end of the first regulating unit (814) are respectively connected to the first end and the second end of the first control unit (812); the second end of the first regulating unit (814) is also connected to the first end of the third switch circuit (813); the fourth end of the first regulating unit (814) is connected to the positive end of the brightness control end of the lamp; the fifth end of the first regulating unit (814) is connected to the negative end of the brightness control end of the lamp, the second end of the third switch circuit (813), and the first end of the first detection unit (815); The input end of the first control unit (812) is connected to the first output end of the input control module (7), the output end of the first control unit (812) is connected to the control end of the third switch circuit (813), and the first control unit (812) is used to output a brightness PWM signal based on the brightness adjustment signal; The second end of the first detection unit (815) is connected to the first detection end of the input control module (7); The third switch circuit (813) is used to switch the on-off state based on the brightness PWM signal, thereby outputting a brightness current signal, and then adjusting the current at the brightness control end of the lamp by adjusting the resistance value of the resistor in the first adjustment unit (814); The input control module (7) detects the real-time brightness of the lamp based on the current and voltage at the second end of the first detection unit (815).

7. The dimming system according to claim 5, characterized in that: The color temperature driving module (82) comprises: a second control unit (821), a fourth switch circuit (822), a second adjustment unit (823) and a second detection unit (824), wherein: The first end of the second regulating unit (823) is connected to the first end of the brightness driving module (81), the second end and the third end of the second regulating unit (823) are respectively connected to the first end and the second end of the second control unit (821), the second end of the second regulating unit (823) is also connected to the first end of the fourth switch circuit (822), the fourth end of the second regulating unit (823) is connected to the positive end of the color temperature control end of the lamp, and the fifth end of the second regulating unit (823) is connected to the negative end of the color temperature control end of the lamp, the second end of the fourth switch circuit (822) and the first end of the second detection unit (824); The input end of the second control unit (821) is connected to the second output end of the input control module (7), the output end of the second control unit (821) is connected to the control end of the fourth switch circuit (822), and the second control unit (821) is used to output a color temperature PWM signal based on the color temperature adjustment signal; The second end of the second detection unit (824) is connected to the second detection end of the input control module (7); The fourth switch circuit (822) is used to switch the on-off state based on the color temperature PWM signal, thereby outputting a color temperature current signal, and then adjusting the current at the color temperature control end of the lamp by adjusting the resistance value of the resistor in the second adjustment unit (823); The input control module (7) detects the real-time color temperature of the lamp based on the current and voltage at the second end of the second detection unit (824).

8. The dimming system according to claim 1, wherein: Also includes: Loop DIP switch module (9), The output end of the loop dial switch module (9) is connected to the third detection end of the input control module (7), and the loop dial switch module (9) is used to manually turn on the brightness adjustment function and color temperature adjustment function of the lamp; The first detection end and the second detection end of the input control module (7) are respectively connected to the first end and the second end of the DCDC driving module (8). The input control module (7) is used to calibrate the working state of the lamp based on the switch state of the loop dial switch module (9) and in combination with the brightness and color temperature of the lamp.

9. A track lighting system, characterized in that: include: A constant voltage source (10), a lamp module (11), a track (12), and a dimming system according to any one of claims 1 to 8, wherein: The output end of the constant voltage source (10) is connected to the metal strip inside the track, and the output end of the constant voltage source (10) is also connected to the power supply end of the first power processing module (1) and the power supply end of the DCDC driving module (8); The lamp module (11) is installed in the track (12), and the conductive end of the lamp module (11) is connected to the metal strip inside the track (12).

Images