CN217283473U

CN217283473U - Stage lamp dimming circuit

Info

Publication number: CN217283473U
Application number: CN202221074753.3U
Authority: CN
Inventors: 陈小聪
Original assignee: Ckc Lighting Co ltd
Current assignee: Ckc Lighting Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-08-23
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses a stage lamp dimmer circuit relates to the dimmer circuit field. The stage lamp dimming circuit comprises a DMX512 console, a dimming signal is sent to a display panel single chip microcomputer, the display panel single chip microcomputer receives the dimming signal, a serial port signal is sent to a main control panel single chip microcomputer, the main control panel single chip microcomputer receives the serial port signal, a control signal is sent to an FPGA module, the FPGA module receives the control signal, and a plurality of LED stage lamps are controlled by a plurality of SPWM signals to be dimmed. The circuit cost can be reduced, the light dimming precision of the stage lamp is improved, the problem that the light dimming is not smooth due to the fact that the stage lamp is high-definition camera shooting jitter and the driving circuit noise and the low brightness are achieved when the light dimming is conducted is solved, and the effects of enabling the light dimming to be smooth and eliminating the light dimming noise are achieved.

Description

Stage lamp dimming circuit

Technical Field

The utility model belongs to the technical field of the dimmer circuit and specifically relates to a stage lamp dimmer circuit.

Background

With the development of the stage lamp industry, the market has higher and higher requirements on the stage lamps, and more effects, higher dimming frequency and higher dimming precision are required, namely, the SPWM (sinusoidal pulse width modulation) method is developed to control dozens or even hundreds of LED single-point controllable stage lamp products, the SPWM (sinusoidal pulse width modulation) method is mature, the effect is basically the same when narrow pulses with equal impulse and different shapes are added to a link with inertia. The SPWM method is based on the theoretical conclusion, and uses a PWM waveform, i.e., SPWM waveform, in which the pulse width changes according to a sine rule and is equivalent to a sine wave, to control the on/off of a switching device in an inverter circuit, so that the area of the output pulse voltage is equal to the area of the sine wave expected to be output in a corresponding interval, and the frequency and amplitude of the output voltage of the inverter circuit can be adjusted by changing the frequency and amplitude of the modulation wave. Because tens or hundreds of single-points of LEDs are controllable with high precision, the conventional circuit scheme is that a plurality of single-chip microcomputers are used in combination to provide multi-path high-resolution PWM (Pulse Width ModulaTIon), however, the defects of this method are: when tens or hundreds of high-resolution PWM are output, the high-resolution PWM can be realized only by combining a plurality of or dozens of single-chip microcomputers, so that the cost is high and the circuit is complex. And secondly, the dimming precision is low, the high-definition camera shooting jitter is high, the low-brightness flicker is low, the low-brightness consistency is poor, the dimming smoothness is poor, the dimming noise is large, and the heating value is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can improve the stage lamp dimmer circuit of the precision of adjusting luminance, reduce cost to drive circuit noise, low luminance when reaching and preventing the shake of stage lamp high definition camera shooting, adjusting luminance adjust luminance unsmooth effect.

Stage lamp dimmer circuit, include:

the DMX512 console sends a dimming signal to the display panel singlechip;

the display panel single chip microcomputer receives the dimming signal and sends a serial port signal to the main control panel single chip microcomputer;

the main control board single chip microcomputer receives the serial port signal and sends a control signal to the FPGA module;

and the FPGA module is used for receiving the control signal and outputting a plurality of SPWM signals to control the plurality of LED stage lamps to adjust the light.

Stage lamp dimmer circuit, the display panel singlechip is through receiving the signal of adjusting luminance, send serial signals to main control board singlechip, send control signal control FPGA module output multichannel SPWM signal control many LED stage lamps to adjust luminance to the FPGA module by the main control board singlechip, because FP GA module has only taken a serial ports of main control board singlechip, therefore the IO mouth resource that can save the main control board singlechip is used for realizing other functions, can reduce circuit cost, and can improve stage lamp dimming precision, solve the shake of making a video recording of stage lamp high definition, drive circuit noise when adjusting luminance, the unsmooth problem of low luminance dimming, reach and make the level and smooth of adjusting luminance, eliminate the effect of the noise of adjusting luminance.

Furthermore, the FPGA module further comprises a plurality of SPWM signal output ports DIM for outputting a plurality of SPWM signals.

Furthermore, the LED stage lamp dimming system further comprises a stage lamp driving circuit, wherein the stage lamp driving circuit receives SPWM signals of the SPWM signal output ports DIM and drives the LED stage lamps to DIM light.

And the LCD display screen receives the display signals output by the display panel singlechip and displays data.

Further, the system also comprises a switch power supply module which is used for supplying power for the DMX512 console, the display panel single chip microcomputer, the main control panel single chip microcomputer and the FPGA module.

Drawings

FIG. 1 is a schematic circuit diagram of the light modulation circuit of the stage lamp of the present invention;

fig. 2 is a circuit diagram of the FPGA module of the present invention;

fig. 3 is a circuit diagram of a first SPWM signal output port DIM1 according to the present invention;

fig. 4 is a circuit diagram of a second SPWM signal output port DIM2 according to the present invention;

fig. 5 is a circuit diagram of a third SPWM signal output port DIM3 according to the present invention;

fig. 6 is a circuit diagram of a fourth SPWM signal output port DIM4 according to the present invention;

fig. 7 is a circuit diagram of a fifth SPWM signal output port DIM5 according to the present invention;

fig. 8 is a circuit diagram of a sixth SPWM signal output port DIM6 according to the present invention;

fig. 9 is a circuit diagram of a seventh SPWM signal output port DIM7 according to the present invention;

fig. 10 is a circuit diagram of the main control board single chip microcomputer of the present invention.

Detailed Description

A stage lamp dimming circuit is shown in figure 1 and comprises a DMX512 console, a display panel single chip microcomputer and a phase-locked loop, wherein a dimming signal is sent to the display panel single chip microcomputer; the display panel single chip microcomputer receives the dimming signal and sends a serial port signal to the main control panel single chip microcomputer; the main control board single chip microcomputer receives the serial port signal and sends a control signal to the FPGA module; and the FPGA module is used for receiving the control signal and outputting a plurality of SPWM signals to control the plurality of LED stage lamps to adjust the light.

Fig. 2 is the circuit diagram of FPGA module, the display panel singlechip is through receiving the signal of adjusting luminance, send serial signals to main control board singlechip, send control signal control FPGA module output multichannel SPWM signal control many LED stage lamps to adjust luminance to the FPGA module by the main control board singlechip, because the FPGA module has only taken a serial ports of main control board singlechip, therefore can save the IO mouth resource of main control board singlechip and be used for realizing other functions, can reduce circuit cost, and can improve stage lamp precision of adjusting luminance, solve the shake of stage lamp high definition camera shooting, the drive circuit noise when adjusting luminance, the problem of low luminance uneven of adjusting luminance, reach and make the level and smooth of adjusting luminance, the effect of noise of eliminating the adjusting luminance.

The FPGA module further includes a multi-channel SPWM signal output port DIM, as shown in fig. 3 to 9, for outputting multi-channel SPWM signals.

Still include stage lamp drive circuit, stage lamp drive circuit receives multichannel SPWM signal output port DIM's SPWM signal, and the drive is many LED stage lamps and is adjusted luminance, can effectively drive LED stage lamp and adjust luminance.

The display panel is used for receiving display signals output by the display panel single chip microcomputer and displaying data, so that the data of the dimming signals of the DMX512 console can be effectively monitored, and the adjustment of the DMX512 console is facilitated. The main control board single chip microcomputer is an STM32F series single chip microcomputer, and is shown in figure 10.

The power supply device further comprises a switch power supply module which is used for supplying power for the DMX512 console, the display panel single chip microcomputer, the main control panel single chip microcomputer and the FPGA module respectively, and power supply of each module and the single chip microcomputer can be facilitated.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A stage lighting dimming circuit, comprising:

the DMX512 console sends a dimming signal to the display panel singlechip;

the display panel single chip microcomputer receives the dimming signal and sends a serial port command to the main control panel single chip microcomputer;

2. The stage lighting dimming circuit of claim 1, wherein the FPGA module further comprises a multi-SPWM signal output (DIM) for outputting a multi-SPWM signal.

3. The stage lighting dimming circuit of claim 2, further comprising a stage lighting driver circuit, wherein the stage lighting driver circuit receives SPWM signals from multiple SPWM signal outlets (DIMs) to drive multiple LED stage lights for dimming.

4. The stage lighting dimming circuit of claim 1, further comprising an LCD display screen, wherein the LCD display screen receives the display signal output by the display panel single chip for data display.

5. The stage lamp dimming circuit of claim 1, wherein the main control board single chip microcomputer is an STM32F series single chip microcomputer.

6. A stage lamp dimming circuit as claimed in any one of claims 1-5, further comprising a switching power supply module for respectively supplying power to the DMX512 console, the display panel single chip, the main control panel single chip and the FPGA module.