CN211047308U

CN211047308U - Circuit system of multi-path PWM signal sharing driving module

Info

Publication number: CN211047308U
Application number: CN201922261118.0U
Authority: CN
Inventors: 戴忠果; 梁波
Original assignee: Guangzhou Tenglong Health Industry Co ltd
Current assignee: Guangzhou Tenglong Health Industry Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-07-17
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a multichannel PWM signal sharing drive module's circuit system, it is applied to in multichannel L ED lamps and lanterns circuit, it includes a control module, this control module includes little the control unit, this control module is used for exporting the total signal of adjusting luminance of a PWM and predetermined quantity's switching signal, the total signal of adjusting luminance of PWM comprises the sub-signal of adjusting luminance of PWM of predetermined quantity a colour, these sub-signal of adjusting luminance with switching signal pairs one by one, predetermined quantity's switch module, these switch module with the control module electricity is connected, these switch module one-to-one receives switching signal to lamps and lanterns in the multichannel L ED lamps and lanterns circuit in the circuit is connected to the one-to-one electricity, these switch modules cut off or switch on its corresponding lamps and lanterns circuit according to switching signal, a drive module, this drive module electricity is connected control module and switching module, this drive module is used for receiving and processing the total signal of adjusting luminance of PWM, and cooperate the switching module drive adjust luminance.

Description

Circuit system of multi-path PWM signal sharing driving module

Technical Field

The utility model relates to an L ED lamps and lanterns circuit drive field especially relates to a multichannel PWM signal sharing drive module's circuit system.

Background

Referring to fig. 6, in a driving circuit of a conventional color L ED lamp, each color lamp bead R _ L ED, G _ L ED, B _ L ED … … N _ L ED in a lamp module 4 needs an independent driving module 30R, 30G, 30B … … 30N to drive, and a control module 10 outputs corresponding PWM dimming signals 10R, 10G, 10B … … 10N to the driving modules at the same time, so as to achieve a dimming effect of the L ED lamp.

SUMMERY OF THE UTILITY MODEL

The utility model provides a multichannel PWM signal sharing drive module's circuit system drives multichannel L ED lamps and lanterns by same drive module, simplifies multichannel L ED lamps and lanterns circuit drive system's structure.

The utility model provides a multichannel PWM signal sharing drive module's circuit system, it is applied to in multichannel L ED lamps and lanterns circuit, realize the dimming control to the lamps and lanterns in multichannel L ED lamps and lanterns circuit, it includes a control module, this control module includes little the control unit, this control module is used for exporting the total dimming signal of a PWM and predetermined amount's switching signal, the total dimming signal of PWM comprises the sub-dimming signal of PWM of predetermined amount a kind of colour, these sub-dimming signal with the switching signal is mated one by one, predetermined amount's switching module, these switch modules are connected with the control module electricity, these switch modules one by one correspond and receive the switching signal to the lamps and lanterns in the multichannel L ED lamps and lanterns circuit is connected to the one by one, these switch modules cut off or switch on its circuit of corresponding lamps and lanterns according to the switching signal, a drive module, this drive module electricity is connected control module and switching module, this drive module is used for receiving and handling the total dimming signal of PWM, and cooperate the switching module drive lamps and lanterns adjust luminance.

Preferably, the driving module is a constant voltage driving module, and the constant voltage driving module receives and processes the PWM total dimming signal and outputs a driving voltage.

Preferably, the constant voltage driving module includes a switching tube, a resistor connected in series with the switch, and a capacitor.

Preferably, the switching tube includes, but is not limited to, a MOS tube or a triode.

Preferably, the driving module is a constant current driving module, and the constant current driving module receives and processes the PWM total dimming signal and outputs a driving current.

Preferably, the driving module includes a switching tube, a constant current driving chip, an inductor, a resistor, an electrolytic capacitor, and a schottky diode.

Preferably, the switch module includes a switch tube, and the switch tube includes, but is not limited to, a MOS tube or a triode.

The utility model provides a multichannel PWM signal drive module's that shares circuit system sends through control module and is formed by the combination of a plurality of sub light modulation signal all the light modulation signal, and with the switching signal of sub light modulation signal one-to-one, only receive through a drive module and handle total light modulation signal, cooperation switching signal control switch module cut off with switch on, just realize carrying out light modulation control to a plurality of L ED lamps and lanterns in multichannel L ED lamps and lanterns circuit, compare with traditional multichannel L ED lamps and lanterns circuit drive system, this system architecture has reduced drive module's quantity, and switch module's cost is far less than drive module, reduce lamps and lanterns design cost and maintenance cost from this, again because switch module uses electronic component quantity is less than drive module, the whole volume of reducible lamps and lanterns, and simultaneously, traditional circuit system relatively, the simple circuit architecture of this system makes this circuit easy to maintain, further reduce maintenance cost and the degree of difficulty.

Drawings

Fig. 1 is a circuit system structure diagram of a driving module shared by multiple paths of PWM signals according to an embodiment of the present invention;

fig. 2 is a waveform diagram of a PWM total dimming signal output by the control module according to an embodiment of the present invention;

FIG. 3 is a plot of a region division of the PWM dimming signal output waveform of FIG. 2;

fig. 4 is a PWM sub-dimming signal decomposition output waveform diagram of the PWM total dimming signal output waveform diagram of fig. 2;

FIG. 5 is a waveform diagram of the switching signal output by the control module;

FIG. 6 is a schematic diagram of a conventional color L ED lamp circuit system;

FIG. 7 is a schematic structural diagram of a constant voltage driving module;

fig. 8 is a schematic structural diagram of a constant current driving module;

fig. 9 is a partial structural schematic diagram of a switch module.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The circuit system of the driving module shared by multiple PWM signals provided by the present invention is further described with reference to the accompanying drawings, and it should be noted that the technical solution and design principle of the present invention are described in detail below with only one optimized technical solution.

Referring to fig. 1, the present invention provides a circuit system of a multi-channel PWM signal sharing driving module, which includes a control module 1, a driving module 3, switch modules 2R, 2G, 2B … … N and a plurality of colors of lamps R _ L ED, G _ L ED, B _ L ED … … N _ L ED, wherein the control module includes a Micro Control Unit (MCU) and a common micro control unit peripheral circuit, the micro control module is configured to output a PWM total dimming signal and switch signals 1R, 1G, 1B … … N, the micro control unit peripheral circuit is not repeated herein as a mature known technology, the switch modules are electrically connected to the control module 1, the switch modules 2R, 2G, 2B … … N respectively and correspondingly receive the switch signals 1R, 1G, 1B … … N, the switch modules 2R, 2G, 2B … … N and correspondingly electrically connect to lamps R _ L, B _ … … N of a plurality of colors of lamps in the lamp module 4, the switch modules 2R, G _ L, B _ L N and the switch modules are electrically connected to perform the light adjustment processing according to the led signals, the ED _ L ED, G _ L ED _ L, B _ 462N and the switch modules are electrically connected to the switch modules, and the switch modules are electrically connect to perform the light adjustment processing module and the switch modules.

When the circuit system is based on a red, green and blue light-adjusting led lamp L, a red light-adjusting duty cycle of lamp R _ L ED is 30%, a green light-adjusting duty cycle of lamp G _ L ED is 10%, a blue light-adjusting duty cycle of lamp B _ L ED is 50%, referring to fig. 2, the output waveform of the PWM total light-adjusting signal output by the control module 1 is shown in fig. 3, the PWM total light-adjusting signal within a single period can be divided into three output regions tR, tG and tB, the three regions tR, tG and tB of the PWM total light-adjusting signal are respectively represented by separate PWM light-adjusting signal output waveforms, i.e., the PWM sub-dimming signal R (duty cycle 30%), the PWM sub-dimming signal G (duty cycle 10%, duty cycle B (duty cycle 50%), the total light-adjusting signal R in fig. 4 can be regarded as being in a single light-adjusting period T37%), the PWM sub-dimming signal G (duty cycle) and the dimming signal B (duty cycle) B2) as being in a single light-adjusting level when the light-adjusting signal output period T1, the light-adjusting signal R2 is in a period T cycle, the same as the period T1, the period T2, the period of the dimming signal R2, the light-adjusting signal R-switching signal is equal to the period T-switching period, the period T-B2 period, the period T-B-G2 period, the period is equal to the period, the period is equal to the period, the period of the light-B2 switching period of the PWM total light-B2 switching period of the light-B driving module is equal to the single PWM total light-B2 driving module is equal to the period, the light-B2 switching period, the period.

Preferably, referring to fig. 1 and fig. 7, in the circuit system provided in the first embodiment of the present invention, the driving module 3 may be a constant voltage driving module, the constant voltage driving module is configured to receive and process the PWM total dimming signal and then output a driving voltage, the constant voltage driving module includes a transistor 311,

resistors

312, 313,

diodes

314, 315, 316, 317 and 318, a base (B) of the transistor 311 is sequentially connected to the resistor 312 and the PWM total dimming signal output end of the control module 1, an emitter (E) of the transistor 311 is grounded, and a collector (C) of the transistor 311 is sequentially connected to the resistors 313, the

diodes

314, 315, 316, 317 and 318 and the power supply; of course, the transistor 311 is used as a switching tube, and a MOS tube may be used instead.

Preferably, referring to fig. 1 and 8, different from the first embodiment, the driving module 3 may be a constant current driving module, the constant current driving module IS configured to receive and process the PWM total dimming signal and then output a driving current, the constant current driving module includes a constant current driving chip 321, a transistor 322,

resistors

323 and 324, an inductor 327, a

click capacitor

326 and 3212, a schottky diode 325, and

diodes

328, 329, 3210 and 3211, an ADJ end of the constant current driving chip 321 IS connected to a collector (C) of the transistor 322, an emitter (E) of the transistor 322 IS connected to a power supply through the click capacitor 3212, a base (B) of the transistor 322 IS sequentially connected to the resistor 323 and the PWM total dimming signal output end of the control module 1, an L X end and an IS end of the constant current driving chip 321 are connected in parallel to an IS end, and the inductor 327, the diodes 328, VIN, 3210 and 3211, which are connected in series with each other, and the transistor may also be used as a MOS switch instead of the constant current driving transistor.

Referring to fig. 1 and 9, in the circuit system provided by the present invention, each of the switch modules 2R, 2G, and 2B includes a MOS transistor N1, a gate (G) of the MOS transistor N1 is connected to the switching signal output terminal of the control module 1, a drain (D) of the MOS transistor N1 is connected to the driving output terminal of the driving module 3, and a source (S) of the MOS transistor N1 is connected to the L ED lamp, but the switch module may also be replaced by a triode.

The utility model provides a multichannel PWM signal sharing drive module's circuit system through a driven mode of many PWM signal sharing, has realized the production of low-cost, little volume multichannel L ED lamps and lanterns circuit.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. A circuit system of a multi-channel PWM signal sharing driving module is applied to a multi-channel L ED lamp circuit to realize dimming control of lamps in the multi-channel L ED lamp circuit, and is characterized by comprising the following components:

the control module comprises a micro control unit and is used for outputting a PWM (pulse-width modulation) total dimming signal and a preset number of switching signals, wherein the PWM total dimming signal consists of PWM sub-dimming signals with preset number of colors, and the sub-dimming signals are paired with the switching signals one by one;

the switch modules are electrically connected with the control module, receive the switch signals in a one-to-one correspondence manner and are electrically connected with lamps in a multi-path L ED lamp circuit in a one-to-one correspondence manner, and the switch modules cut off or switch on the circuits of the lamps corresponding to the switch modules according to the switch signals;

and the driving module is electrically connected with the control module and the switch module, and is used for receiving and processing the PWM total dimming signal and matching with the switch module to drive the lamp to dim light.

2. The circuit system of claim 1, wherein the driving module is a constant voltage driving module, and the constant voltage driving module receives and processes the PWM total dimming signal and outputs a driving voltage.

3. The circuit system of claim 2, wherein the constant voltage driving module comprises a switch, a resistor connected in series with the switch, and a capacitor.

4. The circuit system of claim 3, wherein the switching transistor includes but is not limited to a MOS transistor or a triode.

5. The circuit system of claim 1, wherein the driving module is a constant current driving module, and the constant current driving module receives and processes the PWM total dimming signal and outputs a driving current.

6. The circuit system of claim 5, wherein the driving module comprises a switching tube, a constant current driving chip, an inductor, a resistor, an electrolytic capacitor, and a Schottky diode.

7. The circuit system of claim 6, wherein the switching transistor includes but is not limited to a MOS transistor or a triode.

8. The circuit system of claim 1, wherein the switching module comprises a switching transistor, and the switching transistor comprises but is not limited to a MOS transistor or a triode.