CN217789928U

CN217789928U - Intelligent light-adjusting device

Info

Publication number: CN217789928U
Application number: CN202123299205.9U
Authority: CN
Inventors: 许春芳
Original assignee: Huizhou Xuelipai Electronics Co ltd
Current assignee: Huizhou Xuelipai Electronics Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-11-11
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses an intelligent light-adjusting device, intelligent light-adjusting device include gear adjustment signal input part, control circuit, first switch circuit and second switch circuit, control circuit's signal input part with gear adjustment signal input part connects, first switch circuit's controlled end with control circuit's first control signal output part connects, first switch circuit's output is connected to the first end of LED circuit, second switch circuit's controlled end with control circuit's second control signal output part connects, second switch circuit's output is connected to the second end of LED circuit. Above-mentioned utility model provides a gear dimming luminance uneven technical problem of change among the prior art.

Description

Intelligent light-adjusting device

Technical Field

The utility model relates to a technical field, in particular to intelligent light adjusting device adjusts luminance.

Background

The dimming brightness gears on the market are visual and uneven in appearance, and the design is humanized.

The brightness of 1-15 gears on the market is obtained by dividing the ratio of 100% by 15=6.66% per gear, and the brightness of each gear is changed by uniformly dividing the ratio. Because a light-emitting diode (LED) is not linear, a lighting voltage gap is small, and a typical LED voltage is instantly dimmed when 3V is lower than 3V, and dimming, either current driving or voltage driving, is uniform despite a switching frequency or voltage adjustment, and therefore, non-uniform shift-level luminance lumens are caused. Therefore, the brightness change in each shift position is uneven, the brightness change is large in the low shift position, and the brightness change is small in the high shift position. For example, in the 1 st and 2 nd gears, the brightness change is large, and when the 9 th gear is shifted to the 10 th gear, the brightness change is small.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the inhomogeneous technical problem of luminance change when gear is transferred light among the prior art, provide an intelligent light adjusting device.

In order to achieve the above object, the utility model provides an intelligent light-adjusting device, intelligent light-adjusting device includes:

the gear adjusting signal input end is used for acquiring a gear adjusting signal;

the control circuit is provided with a signal input end, a first control signal output end and a second control signal output end, and the signal input end of the control circuit is connected with the gear adjusting signal input end and is used for outputting a corresponding dimming control signal and a switching frequency ratio control signal according to the gear adjusting signal;

the controlled end of the first switch circuit is connected with the first control signal output end of the control circuit, and the output end of the first switch circuit is connected to the first end of the LED circuit and used for adjusting the current value or the voltage value of the LED circuit according to the dimming control signal;

and the controlled end of the second switching circuit is connected with the second control signal output end of the control circuit, and the output end of the second switching circuit is connected to the second end of the LED circuit and used for adjusting the duty ratio of the current value or the duty ratio of the voltage value according to the switching frequency ratio control signal.

Optionally, the control circuit further includes an indicator light circuit, the control circuit further includes a third control signal output terminal, and the controlled terminal of the indicator light circuit is connected to the third control signal output terminal of the control circuit.

Optionally, the control circuit includes a first chip, and a model of the first chip is SOP16-N.

Optionally, the first switch circuit includes a first resistor, a second resistor, and a first switch tube, a first end of the first resistor is a controlled end of the first switch circuit, and a second end of the first resistor, a first end of the second resistor, and a controlled end of the first switch tube are interconnected; the first end of the first switch tube and the second end of the second resistor are grounded, and the second end of the first switch tube is the output end of the first switch circuit.

Optionally, the first switch tube is an NMOS tube.

Optionally, the second switch circuit includes a third resistor, a fourth resistor, and a second switch tube, where a first end of the third resistor is a controlled end of the second switch circuit, and a second end of the third resistor, a first end of the fourth resistor, and the controlled end of the second switch tube are interconnected; the first end of the second switch tube and the second end of the fourth resistor are grounded, and the second end of the second switch tube is the output end of the second switch circuit.

Optionally, the intelligent dimming device further comprises an LED circuit, a first end of the LED circuit is connected to the output end of the first switch circuit, and a second end of the LED circuit is connected to the output end of the second switch circuit.

Optionally, the intelligent dimming device further includes a power circuit, the control circuit further has a power end, the LED circuit further has a power end, the power circuit has a first output end and a second output end, the first output end of the power circuit is connected to the power end of the LED circuit, and the second output end of the power circuit is connected to the power end of the LED circuit.

The utility model discloses a gear adjustment signal input part acquires gear adjustment signal, and control circuit basis dimming control signal and the switching frequency that gear adjustment signal output corresponds account for than control signal, first switch circuit basis dimming control signal adjusts the current value or the magnitude of voltage of LED circuit, second switch circuit basis switching frequency accounts for than control signal adjusts the duty cycle of current value perhaps the duty cycle of magnitude of voltage makes the LED brightness variation in the LED circuit of every gear even to brightness variation is inhomogeneous technical problem when solving gear dimming among the prior art.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is a block diagram of an intelligent dimming device according to an embodiment.

Fig. 2 is a block diagram of an intelligent dimming device according to an embodiment.

Fig. 3 is a schematic circuit diagram of a portion of an intelligent dimming device according to an embodiment.

Fig. 4 is a schematic circuit diagram of a portion of an intelligent dimming device according to an embodiment.

Fig. 5 is a schematic circuit diagram of a portion of an intelligent dimming device according to an embodiment.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

The utility model provides an intelligent light adjusting device to the inhomogeneous technical problem of luminance change when gear dimming among the solution prior art.

In one embodiment, as shown in fig. 1, the smart dimming device includes a gearshift adjustment signal input terminal 10, a control circuit 20, a first switch circuit 30, and a second switch circuit 40, the control circuit 20 has a signal input terminal, a first control signal output terminal, and a second control signal output terminal, the signal input terminal of the control circuit 20 is connected to the gearshift adjustment signal input terminal 10, the controlled terminal of the first switch circuit 30 is connected to the first control signal output terminal of the control circuit 20, the output terminal of the first switch circuit 30 is connected to a first terminal of an LED circuit 50, the controlled terminal of the second switch circuit 40 is connected to the second control signal output terminal of the control circuit 20, and the output terminal of the second switch circuit 40 is connected to a second terminal of the LED circuit 50.

The gear adjustment signal input end 10 obtains a gear adjustment signal, the control circuit 20 outputs a corresponding dimming control signal and a switching frequency ratio control signal according to the gear adjustment signal, the first switch circuit 30 adjusts a current value or a voltage value of the LED circuit 50 according to the dimming control signal, and the second switch circuit 40 adjusts a duty ratio of the current value or the duty ratio of the voltage value according to the switching frequency ratio control signal. According to the scheme, on the basis of adjusting the current value or the voltage value, the duty ratio of the current value or the duty ratio of the voltage value is adjusted, so that the brightness of the LED in the LED circuit 50 of each gear is uniform, and the technical problem that the brightness is nonuniform when the gears are adjusted in the prior art is solved.

TABLE 1

In the laboratory, the data shown in table 1 and table 2 were measured. In table 1, the ratio relationship between the data acquisition current and the gain compensation is shown, and each step of the total ratio 100% incremental distribution conforms to the change seen by eyes. The specific duty cycle may be detected by a spectrum analyzer.

When the duty ratio of the current value or the duty ratio of the voltage value is actually set, corresponding numerical value setting needs to be performed based on table 2, the switching frequency duty ratio control signal is a PWM percentage signal in the corresponding table, table 2 is data measured from a laboratory, the duty ratio is adjusted according to a left design, 256 levels of PWM percentage are allocated to the duty ratio of the current value or the duty ratio of the voltage value corresponding to each level, at this time, the skip level of PWM cannot be lower than 7 levels, and allocation of each level in table 2 can be specifically referred to.

In terms of implementation, the corresponding relationship may store data of different gears in different registers, acquire gear adjustment signals in different registers through the gear trigger signal, and output the gear adjustment signals to the gear adjustment signal input terminal 10. The final brightness change achieved is the design adjustment duty in table 2. Thereby exhibiting uniform brightness variation.

TABLE 2

In one embodiment, as shown in fig. 2, the control circuit 20 further includes an indicator light circuit 60, the control circuit 20 further includes a third control signal output terminal, and the controlled terminal of the indicator light circuit 60 is connected to the third control signal output terminal of the control circuit 20.

At this time, the indicator circuit 60 may be turned on according to the indicator control signal of the control circuit 20, and may be used to indicate the operating state of the smart dimming device or to provide a fault warning.

Alternatively, as shown in fig. 3, the indicator lamp circuit 60 may be composed of a plurality of indicator lamps LED1, LED2, LED3, LED4, and the like.

In one embodiment, the control circuit 20 includes a first chip U4, and the model of the first chip U4 is SOP16-N. The control circuit 20 further includes capacitors C5 and C6 and resistors R11, R12, R13 and R14.

The SOP16-N chip has wider application range and application foundation, and can directly carry out research and development on the device with lower cost, thereby reducing the selling price of the whole product.

In an embodiment, as shown in fig. 4, the first switch circuit 30 includes a first resistor R19, a second resistor R20, and a first switch Q1, a first end of the first resistor R19 is a controlled end of the first switch circuit 30, and a second end of the first resistor R19, a first end of the second resistor R20, and the controlled end of the first switch Q1 are interconnected; a first end of the first switch tube Q1 and a second end of the second resistor R20 are grounded, and a second end of the first switch tube Q1 is an output end of the first switch circuit 30.

The dimming control signal is sent to the first switching tube Q1, and the output voltage value or the output current value can be adjusted by controlling the on-off of the first switching tube Q1, so that the effect of adjusting the current or the voltage is realized.

Optionally, the first switching tube Q1 is an NMOS tube.

In an embodiment, the second switch circuit 40 includes a third resistor R21, a fourth resistor R22, and a second switch Q2, a first end of the third resistor R21 is a controlled end of the second switch circuit 40, and a second end of the third resistor R21, a first end of the fourth resistor R22, and the controlled end of the second switch Q2 are interconnected; a first end of the second switch Q2 and a second end of the fourth resistor R22 are grounded, and the second end of the second switch Q2 is an output end of the second switch circuit 40.

Wherein, switching frequency accounts for than control signal directly gives second switch tube Q2, and PWM percentage adjusts second switch tube Q2 promptly to can further realize the regulation of duty cycle, according to the laboratory data in table 2, can make the dimming effect that can only adjust luminance the device this moment more even.

In an embodiment, as shown in fig. 2, the smart dimming device further includes an LED circuit 50, a first terminal of the LED circuit 50 is connected to the output terminal of the first switch circuit 30, and a second terminal of the LED circuit 50 is connected to the output terminal of the second switch circuit 40.

As shown in fig. 4, the LED circuit 50 may be composed of a plurality of LED lamps, such as LED lamps Y1-Y16 and LED lamps W1-W16.

In one embodiment, as shown in fig. 2, the smart dimming device further comprises a power circuit 70, the control circuit 20 further has a power terminal, the LED circuit 50 further has a power terminal, the power circuit 70 has a first output terminal and a second output terminal, the first output terminal of the power circuit 70 is connected to the power terminal of the LED circuit 50, and the second output terminal of the power circuit 70 is connected to the power terminal of the LED circuit 50.

At this time, the power circuit 70 provides operating power for the LED circuit 50 and the control circuit 20, and the power circuit 70 may be implemented by the power circuit 70 shown in fig. 5. The power supply circuit 70 includes a power supply chip U2, resistors R2, R3, R4, R5, R6, R7, R8, and R9, a capacitor C2, and a diode D1, and the specific connection relationship is shown in fig. 5. The model of the power supply chip U2 may be AP5056.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Claims

1. An intelligent dimming device, comprising:

the control circuit is provided with a signal input end, a first control signal output end and a second control signal output end, and the signal input end of the control circuit is connected with the gear adjusting signal input end and used for outputting a corresponding dimming control signal and a switching frequency ratio control signal according to the gear adjusting signal;

2. The intelligent dimming device of claim 1, wherein the control circuit further comprises an indicator light circuit, the control circuit further comprising a third control signal output, the controlled terminal of the indicator light circuit being connected to the third control signal output of the control circuit.

3. The smart dimming device of claim 1, wherein the control circuit comprises a first chip having a model number SOP16-N.

4. The intelligent dimming device according to claim 1, wherein the first switching circuit comprises a first resistor, a second resistor and a first switching tube, a first end of the first resistor is a controlled end of the first switching circuit, and a second end of the first resistor, a first end of the second resistor and the controlled end of the first switching tube are interconnected; the first end of the first switch tube and the second end of the second resistor are grounded, and the second end of the first switch tube is the output end of the first switch circuit.

5. The intelligent dimming device according to claim 4, wherein the first switch transistor is an NMOS transistor.

6. The intelligent dimming device according to claim 1, wherein the second switching circuit comprises a third resistor, a fourth resistor and a second switching tube, a first terminal of the third resistor is a controlled terminal of the second switching circuit, and a second terminal of the third resistor, a first terminal of the fourth resistor and the controlled terminal of the second switching tube are interconnected; the first end of the second switch tube and the second end of the fourth resistor are grounded, and the second end of the second switch tube is the output end of the second switch circuit.

7. The intelligent dimming device as claimed in claim 1, further comprising an LED circuit, a first terminal of the LED circuit being connected to the output terminal of the first switching circuit, and a second terminal of the LED circuit being connected to the output terminal of the second switching circuit.

8. The intelligent dimming device of claim 1, wherein said intelligent dimming device further comprises a power supply circuit, said control circuit further having a power supply terminal, said LED circuit further having a power supply terminal, said power supply circuit having a first output terminal and a second output terminal, said first output terminal of said power supply circuit being connected to said power supply terminal of said LED circuit, said second output terminal of said power supply circuit being connected to said power supply terminal of said LED circuit.