Digital-analog fusion control silicon controlled rectifier dimming system

Abstract

The utility model discloses a digital-analog fusion control silicon controlled rectifier dimming system, which comprises an AC power supply, a constant voltage circuit, an MCU, a transmit-receive transmitter, a dimming circuit and an LED load, the MCU, the transmit-receive transmitter, the dimming circuit and the LED load are connected in sequence, the AC power supply is respectively connected with the constant voltage circuit and the MCU, and the constant voltage circuit is connected with the dimming circuit; the constant voltage circuit is responsible for converting an AC voltage into a DC constant voltage used by the dimming circuit; the MCU is responsible for reading and collecting dimming signals, logically processing the dimming signals and converting the dimming signals; and the dimming circuit is responsible for receiving / sending a dimming signal, executing the dimming signal as dimming current and outputting the dimming current to the LED load so as to realize the change of light brightness. According to the system, the problems of light flickering, unsmooth dimming and jumping feeling of the existing analog dimming technology can be fundamentally solved, and the compatibility of the existing silicon controlled dimming lamp with a dimmer can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the controllable silicon light modulation technical field, concretely relates to a controllable silicon light modulation system of digital analog fusion control. BACKGROUND

[0002] At present, most of the controllable silicon light modulation on the market adopts analog light modulation technology, for example, single-chip control: detecting the phase-cut angle of the power input end to change the size of the constant current output value, or using single-chip microcomputer control: detecting the phase-cut angle of the input end to output a PWM signal to the DC / DC light modulation chip to control the constant current output value; this kind of analog control light modulation mode will appear flickering or jumping (light modulation is not smooth) in many cases (for example, light dark state), and will also appear incompatible and unable to light modulation. This incompatible and unsatisfactory light modulation effect has been a problem for engineers in the controllable silicon light modulation field; and the controllable silicon light modulation has been used for more than 60 years, and many European and American countries continue to use it, so it is urgent to change the defects of the old products with new technology. SUMMARY

[0003] The utility model aims at overcoming the defects of the prior art, providing a controllable silicon light modulation system of digital analog fusion control, which can fundamentally solve the light flickering and the problem of light modulation not being smooth and having a jumping feeling of the existing analog light modulation technology, and can also improve the compatibility of the existing controllable silicon light modulation lamps and lanterns to light modulators.

[0004] The technical scheme of the utility model is as follows:

[0005] A controllable silicon light modulation system of digital analog fusion control, comprising an AC power supply, a constant voltage circuit, an MCU, a transceiver, a light modulation circuit and an LED load, wherein the MCU, the transceiver, the light modulation circuit and the LED load are connected in sequence, the AC power supply is connected with the constant voltage circuit and the MCU respectively, and the constant voltage circuit is connected with the light modulation circuit.

[0006] The constant voltage circuit is responsible for converting the AC voltage into a DC constant voltage for the light modulation circuit.

[0007] The MCU is responsible for reading and collecting the light modulation signal, logical processing and signal conversion function.

[0008] The light modulation circuit is responsible for receiving / sending the light modulation signal and executing the light modulation signal as a light modulation current output to the LED load to realize the change of light brightness.

[0009] Further, the constant voltage circuit adopts a high P isolation constant voltage circuit.

[0010] Further, the high P isolation constant voltage circuit is a circuit of flyback architecture or a circuit of PFC+LLC architecture.

[0011] Further, the transceiver adopts a universal asynchronous receiver-transmitter.

[0012] Further, the dimming circuit adopts a dimming BUCK circuit.

[0013] Compared with the prior art, the utility model has the advantages that the utility model discloses discards the traditional thyristor dimming scheme, adopts MCU to read the cut phase angle of the AC end alternating current sine wave, thereby picking up the dimming signal of the thyristor dimmer, adopts the UART (universal asynchronous receiver-transmitter) of bidirectional communication in the DC / DC dimming circuit and connects with MCU, receives the control signal of MCU and adjusts the constant current output of the dimming BUCK circuit in real time, the whole process adopts digital signal control, thereby making the dimming signal digital, the control signal digital, the execution signal digital, realizing anti-interference, smooth digital dimming perfect experience. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0015] Figure 1 The utility model provides a circuit schematic diagram of the silicon controlled rectifier dimming system of digital-analog fusion control. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed to the utility model by combining with the drawings and embodiments.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] In order to illustrate the technical scheme described in the utility model, the following will be explained by specific embodiments.

[0018] EMBODIMENT

[0019] Please refer to Figure 1The embodiment provides a silicon controlled rectifier dimming system of digital-analog fusion control, which comprises an AC power supply, a high-P isolation constant voltage circuit, an MCU, a universal asynchronous receiver-transmitter, a dimming BUCK circuit and an LED load, wherein the MCU, the universal asynchronous receiver-transmitter, the dimming BUCK circuit and the LED load are sequentially connected, the AC power supply is connected with the high-P isolation constant voltage circuit and the MCU respectively, and the high-P isolation constant voltage circuit is connected with the dimming BUCK circuit.

[0020] The silicon controlled rectifier dimming system of digital-analog fusion control discards the traditional silicon controlled rectifier dimming scheme, adopts the MCU to read the cut-phase angle of the AC sine wave at the AC end, thereby picking up the dimming signal of the silicon controlled rectifier dimmer, adopts the UART (universal asynchronous receiver-transmitter) of bidirectional communication to be connected with the MCU in the DC / DC dimming circuit, receives the control signal of the MCU and adjusts the constant current output of the dimming BUCK circuit in real time, and the whole process is controlled by the digital signal, so that the dimming signal, the control signal and the execution signal are digitalized, interference resistance is realized, and a smooth digital dimming perfect experience is realized.

[0021] The silicon controlled rectifier dimming system of digital-analog fusion control has the following advantages:

[0022] 1. Digital dimming, strong interference resistance;

[0023] 2. Smooth dimming without micro flashing and step feeling can be realized as low as 0.1%;

[0024] 3. Complete dimming is supported, and no back flashing or ghost fire is ensured;

[0025] 4. High-quality full-range DC dimming can be truly realized;

[0026] 5. Parameters can be conveniently and flexibly configured.

[0027] The above is only a preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection range of the utility model.

Claims

1. A thyristor dimming system of digital-analog fusion control, characterized in that: It comprises an AC power supply, a constant voltage circuit, an MCU, a transceiver, a dimming circuit and an LED load, the MCU, the transceiver, the dimming circuit and the LED load are sequentially connected, the AC power supply is connected with the constant voltage circuit and the MCU respectively, and the constant voltage circuit is connected with the dimming circuit. The constant voltage circuit is responsible for converting AC voltage into DC constant voltage for the dimming circuit. The MCU is responsible for reading and collecting dimming signals, logical processing and signal conversion. The dimming circuit is responsible for receiving / sending dimming signals and executing the dimming signals as dimming current output to the LED load to realize the change of light brightness.

2. The thyristor dimming system of claim 1, wherein: The constant voltage circuit adopts a high P isolation constant voltage circuit.

3. The SCR dimming system of claim 2, wherein: The high P isolation constant voltage circuit is a circuit of flyback architecture or a circuit of PFC+LLC architecture.

4. The SCR dimming system of claim 1, wherein: The transceiver adopts a universal asynchronous transceiver.

5. The SCR dimming system of claim 1, wherein: The dimming circuit adopts a dimming BUCK circuit.

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