Dimming control system

Abstract

The utility model discloses a dimming control system, which comprises a master control module, a dimmer, a dimming power supply, a power supply controller, a phase detection module and a power supply parameter setting module, and the power supply parameter setting module comprises a current setting unit and a dimming curve setting unit. The current setting unit sets the maximum output current of the dimming power supply, and the dimming curve setting unit sets the dimming curve of the dimming power supply, so that the dimming power supply is matched with the lighting device and the dimmer, and the problem of dimming flicker caused by poor matching degree of the dimming power supply is solved. And meanwhile, by setting the maximum output current, various current settings can be realized so as to adapt to the dimming operation of more diversified lighting devices.

Description

Technical Field

[0001] The utility model relates to the technical field of LED dimming, in particular to a dimming control system. Background Art

[0002] At present, the thyristor dimming is generally adopted for the dimming control systems on the market, which can only achieve a fixed current output and cannot adjust the magnitude of the output current. When the dimmer and the lamp in the dimming control system are not well matched, the problem of dimming flicker will occur due to the phase-cut angle jitter, and even the dimming power supply or the lamp may be damaged. However, if different dimming power supplies are matched for different lamps, the cost will be greatly increased. Therefore, the diversification of lighting fixtures also puts forward higher requirements for the dimming control system.

[0003] The purpose of this application is to provide a dimming control system that solves at least one of the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to design a dimming control system to solve the above technical deficiencies.

[0005] The utility model designs a dimming control system, which is characterized in that it includes a main control module, a dimmer, a dimming power supply, a power controller, a phase detection module, and a power parameter setting module;

[0006] The power parameter setting module includes a current setting unit and a dimming curve setting unit. The input end of the dimmer is electrically connected to the power supply end, the output end of the dimmer is respectively electrically connected to the input end of the dimming power supply and the phase detection module, the output end of the dimming power supply is respectively electrically connected to the main control module and the lighting device, the power controller is respectively electrically connected to the dimming power supply and the main control module, and the current setting unit, the dimming curve setting unit, and the phase detection module are respectively electrically connected to the main control module.

[0007] The current setting unit sets the maximum output current of the dimming power supply according to the current parameters of the lighting device. The dimming curve setting unit adapts the corresponding dimming curve according to the dimming effect of the dimmer and the usage scenario. The phase detection module transmits the phase-cut information of the dimmer to the main control module. The main control module calculates the duty cycle information according to the phase-cut information. The dimming power supply determines the actual output current of the dimming power supply according to the duty cycle information, the dimming curve, and the maximum output current, and sends the corresponding dimming signal to the lighting device.

[0008] Preferably, the power parameter setting module is a DIP switch. Multiple dimming curves are stored in the main control module. The DIP switch includes multiple current setting units and dimming curve setting units that are respectively connected in parallel. The current setting unit includes a first switch and a first resistor connected in series between the main control module and the ground terminal. The first resistors of the current setting units are of different sizes. By closing the first switches in different current setting units, each current setting unit corresponds to a different maximum output current Im. The dimming curve setting unit includes a second switch and a second resistor connected in series between the main control module and the ground terminal. The second resistors of the dimming curve setting units are of different sizes. By closing the second switches in different dimming curve setting units, the main control module corresponds to different dimming curves.

[0009] Preferably, the power parameter setting module is an NFC control unit. Power parameter information is stored in the main control module. The power parameter information includes multiple power output currents and multiple dimming curves. The NFC control unit is wirelessly connected to an external NFC sensing unit for receiving and storing the set power parameter information sent by the external NFC sensing unit. The set power parameter information includes a set power output current and a set dimming curve. The main control module is used to obtain the set power parameter information in the NFC control unit and perform dimming control on the lighting device according to the power parameter information stored in the main control module that corresponds to and is consistent with the set power parameter information.

[0010] Preferably, an optocoupler isolation module is provided between the phase detection module and the main control module.

[0011] Preferably, the dimming power supply includes an input rectifier filter unit, a transformer unit, an output rectifier filter unit, and a DC conversion unit that are electrically connected in sequence.

[0012] The input rectifier filter unit is respectively electrically connected to the output terminal of the dimmer and the phase detection module. The power controller is respectively electrically connected to the transformer unit and the output rectifier filter unit. The DC conversion unit is respectively electrically connected to the main control module and the lighting device.

[0013] Preferably, the dimming curves are logarithmic dimming curves, linear dimming curves, and power function dimming curves.

[0014] The technical effects of the present utility model are as follows: The current setting unit sets the maximum output current of the dimming power supply, and the dimming curve setting unit sets the dimming curve of the dimming power supply, enabling the dimming power supply to better adapt to lighting devices, dimmers, usage scenarios, etc., and solving the problem of dimming flicker caused by poor matching of the dimming power supply. At the same time, by setting the maximum output current, multiple current settings can be achieved to adapt to the dimming operations of more diverse lighting devices, and most lighting devices on the market can be adapted.

[0015] By adjusting the dimming curve, a wider dimming range can be achieved, controlling different brightness changes of the lighting device to achieve different lighting effects and meet the lighting requirements in different usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the structural principle block diagram of Embodiment 1 of a dimming control system provided by the present utility model;

[0017] Figure 2 is the structural principle block diagram of Embodiment 2 of a dimming control system provided by the present utility model;

[0018] Figure 3 is the schematic diagram of the dimming curve of a dimming control system provided by the present utility model.

[0019] The reference numerals are as follows:

[0020] 1, main control module; 2, dimmer; 3, dimming power supply; 4, power controller; 5, phase detection module; 6, power parameter setting module; 61, current setting unit; 62, dimming curve setting unit; 7, optocoupler isolation module; 8, input rectifier filter unit; 9, transformer unit; 10, output rectifier filter unit; 11, DC conversion unit; 12, lighting device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the present utility model.

[0022] Embodiment 1

[0023] In this embodiment, as Figure 1 shown, a dimming control system disclosed by the present utility model includes a main control module 1, a dimmer 2, a dimming power supply 3, a power controller 4, a phase detection module 5, and a power parameter setting module 6;

[0024] The power parameter setting module 6 includes a current setting unit 61 and a dimming curve setting unit 62. The input end of the dimmer 2 is electrically connected to the power supply end, and the power supply end is an AC input power supply. The output end of the dimmer 2 is respectively electrically connected to the input end of the dimming power supply 3 and the phase detection module 5. The output end of the dimming power supply 3 is respectively electrically connected to the main control module 1 and the lighting device 12. The power controller 4 is respectively electrically connected to the dimming power supply 3 and the main control module 1. The current setting unit 61, the dimming curve setting unit 62, and the phase detection module 5 are respectively electrically connected to the main control module 1. An optocoupler isolation module 7 is provided between the phase detection module 5 and the main control module 1.

[0025] The power parameter setting module 6 is a DIP switch. Multiple dimming curves are stored in the main control module 1. The DIP switch includes a plurality of current setting units 61 and dimming curve setting units 62 that are respectively connected in parallel. The current setting unit 61 includes a first switch and a first resistor connected in series between the first ADC port of the main control module 1 and the ground terminal. The sizes of the first resistors in each current setting unit 61 are different. By closing the first switches in different current setting units 61, different voltage values are detected at the first ADC port of the main control module 1. Therefore, each current setting unit 61 corresponds to a different maximum output current Im. The dimming curve setting unit 62 includes a second switch and a second resistor connected in series between the second ADC port of the main control module 1 and the ground terminal. The sizes of the second resistors in each dimming curve setting unit 62 are different. By closing the second switches in different dimming curve setting units 62, different signal values are detected at the second ADC port of the main control module 1, so that the main control module 1 corresponds to different dimming curves.

[0026] In this embodiment, there are four first switches, namely switch K3, switch K4, switch K5, and switch K6, and four first resistors, namely R1, R2, R3, and R4. Before leaving the factory, the combination of the set maximum output current and the on-off states of each first switch is corresponded one by one to achieve current grading. There are two second switches, namely K1 and K2, and two second resistors, namely R5 and R6. Before leaving the factory, the combination of each dimming curve and the on-off states of each second switch is corresponded one by one to achieve dimming curve switching. It is easy to think that the number of the first switch, the second switch, and the resistance values of the first resistor and the second resistor can be adjusted according to the requirements of the current magnitude, current grade, and the number of dimming curves in the actual application scenario.

[0027] The dimming power supply 3 includes an input rectifier and filter unit 8, a transformer unit 9, an output rectifier and filter unit 10, and a DC conversion unit 11 that are sequentially electrically connected; the input rectifier and filter unit 8 is respectively electrically connected to the output end of the dimmer 2 and the phase detection module 5. The power controller 4 is respectively electrically connected to the transformer unit 9 and the output rectifier and filter unit 10. The DC conversion unit 11 is respectively electrically connected to the main control module 1 and the lighting device 12.

[0028] In this embodiment, the dimmer 2 is a thyristor dimmer, which can be a leading-edge phase-cutting dimmer or a trailing-edge phase-cutting dimmer. The input rectifier and filter unit 8 is an EMI rectifier and filter circuit, and the DC conversion unit 11 is a DC-DC unit. The DC-DC unit and the power parameter setting module 6 convert a constant voltage into a constant current output with adjustable current.

[0029] A feedback circuit is provided between the power controller 4 and the output rectifier and filter unit 10. The energy after thyristor phase-cutting is converted into a stable constant-voltage DC output. The feedback circuit is a standard circuit in the dimming power supply and is implemented by a conventional circuit, which will not be elaborated here.

[0030] As Figure 3 shown, the dimming curves are logarithmic dimming curve, linear dimming curve and power function dimming curve. Among them, the linear dimming curve corresponds to dimming curve 1, the power function dimming curve corresponds to dimming curve 2, and the logarithmic dimming curve corresponds to dimming curve 3. Other dimming curves can be set according to the usage scenario and the dimming effect of the dimmer 2, not limited to the dimming curves described above.

[0031] For example, when the second switch K1 is turned on and K2 is turned off, at this time, the main control module 1 sets the dimming curve as a logarithmic dimming curve according to the on-off states of the second switches. When the maximum input current of the lighting device 12 is 1A and the first switches K3, K4, K5, and K6 are all turned off, at this time, the main control module 1 determines that the maximum output current of the dimming power supply 3 is set to 1A according to the on-off states of the first switches. After power-on, the phase detection module 5 collects the phase-cutting information of the dimmer 2 in real time and sends the collected information to the main control module 1 through the optocoupler isolation module 7. The main control module 1 analyzes the duty cycle of the pulse width modulation signal according to the phase-cutting information. The DC-DC unit determines the actual output current according to the duty cycle information in combination with the dimming curve and the maximum output current, and sends the corresponding dimming instruction to the lighting device 12. The dimming instruction can be a serial port signal, a voltage signal, a PWM signal, etc.

[0032] Among them, as Figure 3 shown, taking the duty cycle of the pulse width modulation signal as 50% as an example, the actual output current can be obtained as 25% of the maximum input current through the set logarithmic dimming curve, that is, the actual output current = 0.25 * 1A.

[0033] Embodiment 2

[0034] In this embodiment, the difference from Embodiment 1 is that, as Figure 2As shown, the power parameter setting module 6 is an NFC control unit, where the NFC control unit uses ST25DV04KC. The main control module 1 stores power parameter information, which includes multiple power output currents and multiple dimming curves. The NFC control unit is wirelessly communication-connected to an external NFC sensing unit for receiving and storing the set power parameter information sent by the external NFC sensing unit. The set power parameter information includes a set power output current and a set dimming curve. The main control module 1 is used to obtain the set power parameter information in the NFC control unit and, according to the power parameter information stored in the main control module 1 that corresponds to the set power parameter information, determine the actual output current through the DC-DC unit of the dimming power supply 3 and output a corresponding dimming signal to perform dimming control on the lighting device 12. Among them, the power output current and the set power output current are the maximum output current of the dimming power supply 3. The actual output current is related to the dimming curve, the maximum output current of the dimming power supply 3, and the phase-cutting information. This has been described in Embodiment 1 and will not be elaborated here.

[0035] The NFC control unit sends the set power parameter information to the main control module 1 through a serial port to adjust the maximum output current and the dimming curve of the DC conversion unit 11. The power output current and the dimming curve information are set through the external NFC sensing unit and stored in the programmable memory in the NFC control unit. The main control module 1 reads the information in the programmable memory to perform dimming control on the lighting device 12.

[0036] The external NFC sensing unit is a carrier with an APP, such as a mobile phone with NFC function. By setting the power parameter information on the APP and transmitting it to the NFC control unit through NFC communication, all the required power output currents and dimming curves are stored in the main control module 1. The modification of the current is not restricted by gears. Compared with the DIP switch, it is more convenient to use and has a wider application range.

[0037] The present utility model is not limited to the above best implementation manner. Anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has a technical solution that is the same as or similar to the present application, it falls within the protection scope of the present utility model.

Claims

1. A dimming control system, characterized in that: It comprises a main control module (1), a dimmer (2), a dimming power supply (3), a power supply controller (4), a phase detection module (5), and a power supply parameter setting module (6); The power parameter setting module (6) comprises a current setting unit (61) and a dimming curve setting unit (62); the input end of the dimmer (2) is electrically connected to the power end; the output end of the dimmer (2) is electrically connected to the input end of the dimming power supply (3) and the phase detection module (5), respectively; the output end of the dimming power supply (3) is electrically connected to the main control module (1) and the lighting device (12), respectively; the power controller (4) is electrically connected to the dimming power supply (3) and the main control module (1), respectively; the current setting unit (61), the dimming curve setting unit (62), and the phase detection module (5) are electrically connected to the main control module (1), respectively.

2. The dimming control system according to claim 1, characterized in that: The power parameter setting module (6) is a dip switch, and a plurality of dimming curves are stored in the main control module (1). The dip switch comprises a plurality of current setting units (61) and a dimming curve setting unit (62) respectively arranged in parallel; the current setting unit (61) comprises a first switch and a first resistor connected in series between the main control module (1) and a ground terminal, and the first resistor of each current setting unit (61) has a different size. By closing the first switches in different current setting units (61), each current setting unit (61) corresponds to a different maximum output current Im; The dimming curve setting unit (62) comprises a second switch and a second resistor connected in series between the main control module (1) and a ground terminal. The second resistors of the dimming curve setting units (62) are of different sizes. By closing the second switches in different dimming curve setting units (62), the main control module (1) corresponds to different dimming curves.

3. The dimming control system according to claim 1, characterized in that: The power parameter setting module (6) is an NFC control unit, and the main control module (1) stores power parameter information, the power parameter information including multiple power output currents and multiple dimming curves; the NFC control unit is wirelessly connected to an external NFC sensing unit, and is used to receive and store the set power parameter information sent by the external NFC sensing unit, the set power parameter information including the set power output current and the set dimming curve; the main control module (1) is used to obtain the set power parameter information in the NFC control unit, and perform dimming control on the lighting device (12) according to the power parameter information stored in the main control module (1) that corresponds to the set power parameter information.

4. The dimming control system according to claim 1, characterized in that: An optical coupling isolation module (7) is provided between the phase detection module (5) and the main control module (1).

5. The dimming control system according to any one of claims 1 to 4, characterized in that: The dimming power supply (3) comprises an input rectifying and filtering unit (8), a transformer unit (9), an output rectifying and filtering unit (10), and a DC conversion unit (11) which are electrically connected in sequence; The input rectifying and filtering unit (8) is electrically connected to the output end of the dimmer (2) and the phase detection module (5), respectively; the power supply controller (4) is electrically connected to the transformer unit (9) and the output rectifying and filtering unit (10), respectively; and the DC conversion unit (11) is electrically connected to the main control module (1) and the lighting device (12), respectively.

6. The dimming control system according to claim 2 or 3, characterized in that: The dimming curve is a logarithmic dimming curve, a linear dimming curve, and a power function dimming curve.

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