CN111669868A - Graded dimming control circuit with memory and graded dimming lighting circuit - Google Patents

Abstract

The invention relates to a hierarchical dimming control circuit with memory and a hierarchical dimming lighting circuit, comprising: the input circuit is provided with a control switch for controlling the on-off of the input circuit; the output circuit is connected with the light-emitting component; the main control chip has a memory storage function, is internally set with delay time and gradually increased duty ratio, and outputs different PWM according to a switching signal of the control switch; and the output control chip receives the PWM signal sent by the main control chip so as to enable the output circuit to output different voltages or currents according to the PWM signal. The main control chip controls and outputs different PWM, and the output control chip realizes outputting different voltage or current according to the PWM signal, namely outputting different power. The purpose of outputting different powers in a grading way is achieved, the circuit is reasonable in connection design, and the application effect is outstanding.

Description

Graded dimming control circuit with memory and graded dimming lighting circuit

Technical Field

The invention relates to the field of illumination, in particular to a graded dimming control circuit with memory and a graded dimming illumination circuit.

Background

The output circuit of the dimming control circuit in the related art is usually directly connected to the lighting assembly, so that the control switch of the input circuit directly controls the switch of the lighting assembly, and the power of the lighting assembly cannot be switched in the control process. The dimmer (such as 0-10V, thyristor dimmer, DALI dimmer, etc.) needs to be added for realization, and the added dimmer is complex in wiring and high in cost.

Disclosure of Invention

The invention aims to provide a graded dimming control circuit with memory and a graded dimming lighting circuit.

The technical scheme adopted by the invention for solving the technical problems is as follows: a hierarchical dimming control circuit with memory is constructed, comprising:

the input circuit is provided with a control switch for controlling the on-off of the input circuit;

the output circuit is connected with the light-emitting component;

the main control chip has a memory storage function, is internally set with delay time and gradually increased duty ratio, and outputs different PWM (pulse width modulation) voltages or currents according to a switching signal of the control switch; and

and the output control chip receives the PWM signal sent by the main control chip so as to enable the output circuit to output different voltages or currents according to the PWM signal.

Preferably, the main control chip is connected with a low-voltage power supply for supplying power.

Preferably, an LED power supply drive is arranged between two ends of the input circuit.

Preferably, the control switch is any one of a toggle switch, a power switch, a control switch, a transfer switch, a disconnecting switch, a relay, an air switch, a knife switch, a travel switch, a wall switch and an intelligent fireproof switch.

Preferably, the step dimming control circuit with memory further comprises a transformer, the transformer comprises an input coil, an output coil and a control coil, and the output coil and the control coil are respectively coupled with the input coil;

the input circuit is connected with two ends of the input coil;

the output circuit is connected with two ends of the output coil;

the output control chip is arranged on one line of the output circuit;

the control chip is respectively connected with one end of the control coil and the output control chip.

Preferably, the step dimming control circuit with memory further comprises a winding coil for inputting the switching signal of the control switch into the main control chip through the transformer winding; or the like, or, alternatively,

the graded dimming control circuit with the memory further transmits a switching signal of the control switch to the main control chip through a photoelectric isolated optocoupler.

A graded dimming lighting circuit comprises the control circuit.

A grading dimming lighting circuit comprises a plurality of groups of control circuits, and the control switches control the input circuits simultaneously.

The implementation of the graded dimming control circuit with the memory and the graded dimming lighting circuit has the following beneficial effects: in the output power supply process of the output circuit, the main control chip controls to output different PWM, and the output control chip outputs different voltage or current according to the PWM signal, namely outputs different power. The purpose of outputting different powers in a grading way is achieved, the circuit is reasonable in connection design, and the application effect is outstanding.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic circuit diagram of a graded dimming lighting circuit composed of a set of graded dimming control circuits with memories and a set of light emitting components according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of a multi-component dimming control circuit with memory and a multi-group light emitting device composed graded dimming lighting circuit according to an embodiment of the present invention;

fig. 3 is a flow chart of the control of the step dimming control circuit.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The graded dimming lighting circuit in a preferred embodiment of the present invention includes a graded dimming control circuit 1 with memory and a light emitting component 2, the graded dimming control circuit 1 with memory and the light emitting component 2 may include one group, as shown in fig. 1, or plural groups, as shown in fig. 2, respectively, one group of graded dimming control circuit 1 with memory controls one group of light emitting component 2, and the light emitting component 2 generally includes an LED lamp for lighting and illumination.

The hierarchical dimming control circuit 1 with memory comprises an input circuit 12, an output circuit 13, a main control chip 14 and an output control chip 16.

The input circuit 12 is provided with a control switch 15 for controlling the on/off of the input circuit 12.

The light emitting element 2 is connected to the output circuit 13, so that the output circuit 13 supplies power to the light emitting element 2.

The main control chip 14 has a memory storage function, and is internally set with a delay time and a duty ratio which is gradually increased.

The main control chip 14 outputs different PWMs according to the switching signal of the control switch 15, and the output control chip 16 receives the PWM signal sent by the main control chip 14, so as to make the output circuit 13 output different voltages or currents according to the PWM signal.

An LED power driver 114 is provided between the two ends of the input circuit 12, and the input circuit 12 outputs a constant voltage or constant current power through the LED power driver 114.

During the output power supply process of the output circuit 13, the main control chip 14 controls to output different PWMs so as to output different voltages or currents, i.e. output different powers. The purpose of outputting different powers in a grading way is achieved, the circuit is reasonable in connection design, and the application effect is outstanding.

As shown in fig. 3, specifically, the principle is as follows:

when only one group of the graded dimming control circuits 1 with memories controls one group of the light-emitting components 2, the main control chip 14 detects a switching signal of the input circuit 12 when the control switch 15 is switched; after long-time power failure, if the power is more than 10 seconds, the control switch 15 is turned on, the main control chip 14 reads the power P stored when the lamp is turned off last time, such as P2, and outputs a corresponding PWM signal according to the power of P2;

each turn-off conserves the power P at the time of the turn-off; when the control switch 15 is turned on: judging the interval time from turning off to turning on;

when the user feels that the brightness needs to be adjusted, the control switch 15 is turned off and turned on for a short time T1, such as 3 seconds; switching to the next gear power set by the main control chip 14; such as P1- > P2- > … - > Pn; pn is then returned to P1; and circulating in sequence.

Preferably, when group control is performed, i.e. one control switch 15 controls the input circuits 12 of a plurality of identical control circuits; when the output power of each control circuit is inconsistent, such as a part of P1, a part of P3, P5, etc., different power, the control switch 15 is turned off and turned on for a time T2 slightly longer than T1, for example, more than 3 seconds and less than 5 seconds; the main control chip 14 outputs the most value, such as the minimum P1 or the maximum Pn; all the light emitting components 2 achieve the purpose of synchronization; i.e. it can be switched off in any gear and switched on for a time T2, and switched to the maximum power in one step. This part of the function is not specific to the patent, in order to better realize group control.

In some embodiments, the control switch 15 may be one of a toggle switch, a power switch, a control switch, a transfer switch, a disconnector, a relay, an air switch, a knife switch, a travel switch, a wall switch, and a smart fire switch. And a voltage-stabilizing constant-current device 16 is arranged at the position where the main control chip 14 is connected with the output circuit 13, so that a voltage-stabilizing constant-current power supply is ensured to be output.

The main control chip 14 is connected to a low voltage power supply, which may be a battery, a coil winding, a capacitor, etc., to supply power to the main control chip 14.

The hierarchical dimming control circuit with memory further comprises a transformer 11, the transformer 11 comprises an input coil 111, an output coil 112 and a control coil 113, and the output coil 112 and the control coil 113 are respectively coupled with the input coil 111.

The input circuit 12 is connected to both ends of the input coil 111; the output circuit 13 is connected to both ends of the output coil 112; the output control chip 16 is provided on one line of the output circuit 13; the control chip 14 is connected to one end of the control coil 113 and the output control chip 16, respectively.

In other embodiments, the step dimming control circuit with memory further comprises a winding coil for inputting the switching signal of the control switch 15 to the main control chip 14 through the transformer winding step down.

In other embodiments, the stepped dimming control circuit with memory further transmits a switching signal of the control switch 15 to the main control chip 14 through a photo-electrically isolated optical coupler.

The above examples of time and step power are examples.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. A hierarchical dimming control circuit with memory, comprising:

the input circuit (12), the said input circuit (12) is equipped with the control switch (15), control the make-and-break of the said input circuit (12);

an output circuit (13) connected to the light emitting element (2);

the main control chip (14) has a memory storage function, delay time and a gradually-increased duty ratio are set in the main control chip, and the main control chip (14) outputs different PWM voltages or currents according to a switching signal of the control switch (15); and

and the output control chip (16) receives the PWM signal sent by the main control chip (14) so as to enable the output circuit (13) to output different voltages or currents according to the PWM signal.

2. The hierarchical dimming control circuit with memory according to claim 1, wherein the main control chip (14) is connected to a low voltage power supply for supplying power.

3. The hierarchical dimming control circuit with memory according to claim 1, wherein an LED power driver (114) is provided between two ends of the input circuit (12).

4. The step dimming control circuit with memory according to claim 1, wherein the control switch (15) is any one of a toggle switch, a power switch, a control switch, a transfer switch, a disconnector, a relay, an air switch, a knife switch, a travel switch, a wall switch, and an intelligent fire switch.

5. The dimming control circuit with memory according to any of claims 1 to 4, further comprising a transformer (11), wherein the transformer (11) comprises an input coil (111), an output coil (112), and a control coil (113), and the output coil (112) and the control coil (113) are respectively coupled with the input coil (111);

the input circuit (12) is connected with two ends of the input coil (111);

the output circuit (13) is connected with two ends of the output coil (112);

the output control chip (16) is arranged on one line of the output circuit (13);

the control chip (14) is respectively connected with one end of the control coil (113) and the output control chip (16).

6. The hierarchical dimming control circuit with memory according to any one of claims 1 to 4, further comprising a winding coil for inputting a switching signal of the control switch (15) to the main control chip (14) through a transformer winding step-down; or the like, or, alternatively,

the grading dimming control circuit with the memory also transmits a switching signal of the control switch (15) to the main control chip (14) through a photoelectric isolated optical coupler.

7. A graded dimming lighting circuit comprising the control circuit of any one of claims 1 to 6.

8. A stepped dimming lighting circuit comprising a plurality of sets of control circuits as claimed in any one of claims 1 to 6, said control switches (15) controlling each of said input circuits (12) simultaneously.

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