WO2019084939A1

WO2019084939A1 - Stepless color temperature and brightness adjustment led light system and control method therefor

Info

Publication number: WO2019084939A1
Application number: PCT/CN2017/109436
Authority: WO
Inventors: 肖志蓝
Original assignee: 肖志蓝
Priority date: 2017-11-04
Filing date: 2017-11-04
Publication date: 2019-05-09

Abstract

A stepless color temperature and brightness adjustment LED light system comprises at least two LED light groups (3) having different high and low color temperature values, and further comprises an adjustment and conversion module (1): connected to a pre-configured external power supply, converting the alternating current inputted from the external power supply to output chopped alternating current, and outputting a corresponding electrical signal after processing the chopped alternating current, the output value of the chopped alternating current being adjustable; and a processing module (2): comprising a control module (21), a timing unit (22) and a storage module (23), the control module (21) being used for receiving the electrical signal outputted by the adjustment and conversion module (1) and driving, according to the electrical signal, a plurality of LED light groups (3) so as to perform a corresponding action; the timing unit (22) starting accumulating timing from when the control module (21) receives the electrical signal, stopping timing until the accumulated time value reaches the preset value, so that the user can arbitrarily adjust the color temperature value of the LED light system and perform stepless adjustment for different brightness at the same color temperature within a preset time.

Description

LED lamp system with stepless color temperature and brightness adjustment and control method thereof

Technical field

The invention relates to the technical field of an LED light source circuit, in particular to an LED lamp system with stepless color temperature and brightness adjustment and a control method thereof.

Background technique

As a new type of lighting tool, LED lighting has the advantages of high luminous efficiency, long life and environmental protection, so it is increasingly used in various lighting fields.

At present, the traditional LED lights mainly have the following lighting problems: 1) only one color temperature or brightness can be emitted, and the function is single; 2) the color temperature and brightness are adjusted by the dual-source color mixing mode through the complicated control circuit, and the color temperature adjustment has limitations. The color temperature value changes according to the change of the brightness. It is impossible to realize a function that the color temperature can be presented at any brightness or multiple color temperatures can be displayed at any brightness. 3) The state of the LED light before the shutdown can not be memorized. After turning on, the color temperature is adjusted again. In actual life, people often do not need to adjust the color temperature frequently. They only need to adjust the color temperature at a specific time to ensure the adjustment of the light atmosphere while ensuring daily life.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and to provide an LED lamp system with stepless color temperature and brightness adjustment and a control method thereof.

In order to achieve the above object, the invention provides a stepless color temperature and brightness adjustment LED lamp system, comprising at least two sets of LED lamp sets having different high and low color temperature values, and further comprising: an adjustment conversion module: and a pre- The external power supply is connected, the alternating current input from the external power supply is converted and outputted to the chopping alternating current, and the chopper alternating current is processed to output a corresponding electrical signal, wherein the chopping alternating current output value is adjustable; The module includes: a control unit, a timing unit and a storage unit, wherein the control unit is configured to receive an electrical signal output by the adjustment conversion module and respectively drive the plurality of groups of LED light groups according to the electrical signal to perform corresponding actions; the timing unit slave control unit The accumulative timing is started when the electric signal is received, and the timing is stopped until the accumulated time value reaches the preset value, wherein during the accumulated timing, the control unit converts the received electrical signal into a corresponding driving signal to adjust the plurality of groups in real time. The LED lamp group works to make the corresponding color temperature value by color mixing; when the accumulated time value reaches the preset value, The unit transmits the duty value of the plurality of groups of LED lamps to the storage unit for covering and storing; after the timing unit stops counting, the control unit sequentially performs the duty value stored in the storage unit according to the received electrical signal to each The LED light group outputs a corresponding drive signal to adjust the brightness of the LED light group and maintain a constant color temperature value.

Further, when the external power supply is powered off and restarted and a duty value is stored in the storage unit, the control list The element outputs a corresponding driving signal to each LED lamp group according to the duty value stored in the storage unit.

Further, the processing module is further configured to be electrically connected to the control unit, wherein the detecting unit is configured to detect a real-time working state of the control unit, where the working state of the control unit includes a closed state, a dimming state, Constant state.

A method for controlling a stepless color temperature and brightness adjustment LED lamp system comprises the following steps:

S1. Turn on the switch of the external power supply to activate the adjustment conversion module and the processing module;

S2. The adjustment conversion module converts the alternating current input from the external power supply to output the chopping alternating current, wherein the size of the output chopping alternating current is manually adjusted, and the output chopping alternating current is transmitted to the processing module through the rectified output corresponding electric signal. At the same time, the processing module detects whether a duty value is stored in the storage unit;

S3. If it is not detected that there is an associated duty ratio value in the storage unit, the timing unit starts accumulating timing from the receipt of the electrical signal by the control unit, wherein during the accumulated timing, the control unit changes in real time according to the received electrical signal. The plurality of sets of LED light groups output corresponding driving signals to adjust the operation of the plurality of sets of LED light groups, so that the color temperature values are obtained by mixing colors;

If it is detected that there is an associated duty cycle value in the storage unit, the control unit converts the received electrical signal into a corresponding driving signal and outputs the corresponding driving signal to each LED light group, and the timing unit is controlled from the control unit. When the electrical signal is received, the accumulated timing is started. During the accumulated timing, when the electrical signal received by the control unit does not change, the plurality of sets of LEDs are maintained at a constant color temperature value, and conversely, when the control unit receives the electrical signal. If there is a change, the control unit outputs a corresponding driving signal to the plurality of groups of LED lamps in real time, so that the color is mixed to obtain a corresponding color temperature value;

S4. When the accumulated time value reaches the preset value, the timing unit stops counting and the control unit transmits the duty value of the plurality of groups of LED groups to the storage unit for overwriting and storing; after stopping the timing, the control unit will use the duty value. The received electrical signals are converted into corresponding driving signals and output to respective LED light groups, thereby realizing brightness adjustment of multiple sets of LED light groups and maintaining a constant color temperature value.

Further, when multiple sets of LED light groups are required to stop working, the external power supply switch is turned off, so that each LED light group stops working; when the switch of the external power supply unit is turned on next time, the multiple sets of LED light groups remain broken. The color temperature value before electricity.

Further, the detecting unit detects the working state of the control unit in real time.

The invention adopts the above-mentioned solution, and has the beneficial effects that: the control unit is configured to receive the electrical signal output by the adjustment conversion module and respectively drive the plurality of groups of LED light groups according to the electrical signal to perform corresponding actions, and the user may be in the preset time. The color temperature value of the LED lamp system is arbitrarily adjusted. At the same time, when the preset time is reached, the duty value corresponding to the color temperature value of the LED lamp system is stored in the storage unit, so that the user needs to perform brightness later. When adjusting, only the chopping AC power is adjusted, and the control unit outputs the corresponding drive to each LED lamp group according to the stored duty value. The dynamic signal is used to keep the LED light system at the same color temperature for stepless adjustment of different brightness.

DRAWINGS

Figure 1 is a schematic view of the module of the present invention.

Figure 2 is a circuit diagram of the present invention.

Among them, 1-adjustment conversion module, 2-processing module, 22-control unit, 24-time unit, 23-storage unit, 24-detection unit, 3-LED light group.

Detailed ways

The invention will now be further described in conjunction with specific embodiments.

Referring to FIG. *, in the embodiment, a stepless color temperature and brightness adjustment LED lamp system includes at least two sets of LED lamp sets 3 having different high and low color temperature values (for ease of understanding, in this embodiment) The two groups of LED light groups 3, wherein each group of LED light groups 3 are formed by a plurality of LED lights connected in series), the conversion module 1 and the processing module 2 are adjusted.

In this embodiment, the adjustment conversion module 1 is composed of a dimming circuit (consisting of a thyristor power supply adjusting component, etc.), a rectifying circuit, and a photocoupler, and the intermodulation between the electric components is used to adjust the conversion module 1 to have a corresponding The function. The adjustment conversion module 1 is connected to an external power supply, thereby converting the alternating current input from the external power supply to the chopper alternating current by using the dimming circuit, and adjusting the output value of the chopping alternating current by using the dimming circuit; The chopped alternating current outputted by the optical circuit is converted into a corresponding direct current, and the rectified direct current is converted into a corresponding electrical signal by a photocoupler.

In this embodiment, the processing module 2 includes a control unit 21, a timing unit 22, a storage unit 23, and a detecting unit 24, and the control unit 21 and the photocoupler, the plurality of sets of LED light groups 3, the timing unit 22, the storage unit 23, and The detecting unit 24 is connected to the telecommunication; the control unit 21 is configured to receive the electrical signals output by the adjustment conversion module 1 (photocoupler), so that the control unit 21 respectively drives the plurality of sets of LED lamp sets 3 to perform corresponding actions according to the received electrical signals. . By using the coupling function of the optocoupler, the output value of the chopping AC is adjusted, so that the corresponding electric signal is output to the control unit 21 in real time via the optocoupler in accordance with the change of the chopping alternating current. The timing unit 22 has a timing function, and the cumulative timing is started from the control unit 21 upon receiving the electrical signal output by the photocoupler until the accumulated time value reaches a preset value, and the timing unit 22 stops counting. In this embodiment, the pre-timing The setting value can be arbitrarily set according to the user's needs, and can be different values such as 5s, 10s, 15s, etc., wherein during the accumulated timing of the timing unit 22, the control unit 21 replaces the received electrical signal with a corresponding driving signal ( For example, a driving electric signal for driving the LED lamp, such as voltage and current, is respectively transmitted to each LED lamp group 3, so that each LED lamp group 3 performs corresponding lighting display, thereby causing each LED lamp group 3 to perform color mixing, and correspondingly obtained The color temperature value; during this accumulated timing, the user operates the dimming circuit of the adjustment conversion module 1 to adjust the output value of the chopping alternating current to change the color temperature of each LED lamp group 3, that is, by adjusting the chopping alternating current The output value is such that the electrical signal received by the control module changes accordingly, and the processing module 2 performs data processing according to the magnitude of the received electrical signal, thereby outputting a corresponding driving signal to each LED light group 3, thereby facilitating the user to pre- The color temperature of the LED lamp is adjusted within the set time. When the accumulated time value reaches the preset value, the control unit 21 transmits the duty value of the plurality of sets of LED light groups 3 to the storage unit 23 for storage. After the timing unit 22 stops counting, the control unit 21 outputs a corresponding driving signal to each LED light group 3 in real time according to the received electrical signal according to the duty value stored in the storage unit 23, that is, the user needs to use the LED light. When the brightness is adjusted, the magnitude of the chopping alternating current is adjusted to cause a change in the value of the electric signal output to the control unit 21, so that the control unit 21 outputs a change to the driving signal of the LED lamp group 3 (chopping alternating current) When the voltage is increased, the electric signal and the driving signal are increased; on the contrary, when the chopping alternating current is decreased, the electric signal and the driving signal are decreased), thereby realizing the brightness adjustment of the LED lamp group 3, and at the same time, the LED is changed due to the duty ratio value. The lamp maintains the same color temperature value for brightness change, achieving brightness adjustment of the same color temperature value and brightness adjustment to stepless adjustment.

In this embodiment, when the switch of the external power supply is turned off, the LED light is turned off; when the switch of the external power supply is closed and restarted, since the duty value is stored in the storage unit 23, the control unit 21 is pre-stored in the storage unit. The duty wallpapers in the 23 respectively output corresponding driving signals to the LED light groups 3, so that the LED lights maintain the color temperature values set before the previous shutdown, thereby ensuring the normal use of daily life, and avoiding the user being turned on each time. It is necessary to reset the color temperature; in addition, in order to facilitate the user to reset the color temperature value after the switch of the external power supply is turned on and restarted, during the accumulated time of the timing unit 24, the user manually adjusts the output value of the chopping AC, thereby The electrical signal received by the control unit 21 changes, and the control unit 21 transmits the corresponding driving signal to the plurality of sets of LED light groups 3 in real time according to the change of the electrical signal to adjust the color temperature of the LED light group 3 in real time, to be accumulated. When the value reaches the preset value, the control unit 21 transmits the duty value of the plurality of sets of LED light groups 3 of the moment to the storage unit 23 for coverage. Memory to replace a former pre-stored duty cycle value in the storage unit 23.

In this embodiment, in practical applications, when the chopping alternating current is adjusted to a small value for easy understanding, in the embodiment, when the value is lower than 2% of the output value of the external power supply, the control unit is smaller. 21, because the value of the received electrical signal is too small, there will be a misjudgment problem of turning off the LED group 3, thereby turning off the LED group 3 and not adjusting the brightness of the LED group 3. The processing module 2 is further provided with a detecting unit 24 electrically connected to the control unit 21, wherein the detecting unit 24 is configured to detect a real-time working state of the control unit 21, wherein the working state of the control unit 21 includes The off state, the dimming state, and the constant state, when the external power supply is powered off, the control unit 21 is in the off state at this time, and the state control unit 21 does not transmit the driving signal to the LED lamp group 3; when the control unit 21 When there is a change in the received electrical signal, the control unit 21 is in a dimming state. In this state, the control unit 21 always transmits a corresponding driving letter to the LED light group 3 in real time according to the received electrical signal change. No., it can ensure that the LED lamp group 3 can adjust the color temperature or brightness when the chopper AC low output, avoiding the problem of misjudgment of the LED lamp group 3; when the electric signal received by the control unit 21 is unchanged, the control unit at this time 21 is a constant state in which the control unit 21 is always transmitted to the LED lamp group with a constant drive signal, so that the plurality of sets of LED lamp sets maintain a constant color temperature and brightness.

When the external power supply is powered off or the reset switch 11 is activated, the detecting unit 24 is activated to cause the processing module 2 to be completely powered off, that is, when the detecting unit 24 is not activated, the LED light group 3 will never turn the LED light. Group 3 performs a shutdown operation to ensure normal use of the LED lamp set 3 at low currents.

The method for controlling the stepless color temperature and brightness adjustment LED lamp system of the present invention will now be further described with reference to specific embodiments.

S1. Turn on the switch of the external power supply to activate the regulation conversion module (1) and the processing module (2).

S2. The adjustment conversion module (1) converts the alternating current input from the external power supply to the output chopping alternating current, wherein the size of the output chopping alternating current is manually adjusted, and the output chopping alternating current is rectified and outputted by the corresponding electric signal. To the processing module (2), at the same time, the processing module (2) detects whether a duty value is stored in the storage unit (23).

S3. If the relevant duty ratio value is not detected in the storage unit (23), the timing unit (22) starts accumulating timing from the receipt of the electrical signal by the control unit (21), wherein during the accumulated timing, the control unit ( 21) Output corresponding driving signals to the plurality of groups of LED lamp groups (3) in real time according to the received electrical signal changes to adjust the operation of the plurality of groups of LED lamp groups (3) to obtain corresponding color temperature values by color mixing.

If it is detected that there is an associated duty ratio value in the storage unit (23), the control unit (21) converts the received electrical signal into a corresponding driving signal with the stored duty value to output to each LED light group ( 3), and the timing unit (22) starts accumulating timing from when the control unit (21) receives the electric signal, and during the accumulated timing, when the electric signal received by the control unit (21) does not change, the plurality of sets of LED lights are caused. Group (3) maintains a constant color temperature value. Conversely, when the electrical signal received by the control unit (21) changes, the control unit (21) outputs corresponding driving signals to the plurality of sets of LED light groups (3) in real time, so that The color mixture gets the corresponding color temperature value.

S4. When the accumulated time value reaches the preset value, the timing unit (22) stops counting and the control unit (21) transmits the duty value of the plurality of groups of LED light groups (3) to the storage unit (23) for overwriting and storing; After the timer is stopped, the control unit (21) converts the received electrical signal into a corresponding driving signal by using the duty value to output to each LED lamp group (3), thereby realizing brightness adjustment of the plurality of LED lamp groups (3). Maintain a constant color temperature value.

In this embodiment, when multiple sets of LED lamp sets (3) are required to stop working, the external power supply is turned off. Off, the LED light group (3) stops working; when the switch of the external power supply unit is turned on next time, the multiple sets of LED light groups (3) still maintain the color temperature value before the power is turned off.

In this embodiment, the detecting unit (24) detects the working state of the control unit (21) in real time.

The embodiments described above are only preferred embodiments of the invention and are not intended to limit the invention in any way. Any and all possible variations and modifications of the technical solutions of the present invention may be made by those skilled in the art without departing from the scope of the present invention. Therefore, equivalent equivalent changes made in accordance with the teachings of the present invention should be included in the scope of the present invention.

Claims

A stepless color temperature and brightness adjustment LED lamp system comprises at least two sets of LED lamp sets (3) having different high and low color temperature values, characterized in that:

An adjustment conversion module (1) is connected with a pre-configured external power supply, converts the alternating current input by the external power supply to output chopping alternating current, and outputs the corresponding alternating electric signal after the chopper alternating current is processed, wherein the The wave AC output value is adjustable;

a processing module (2) comprising: a control unit (21), a timing unit (22) and a storage unit (23) for receiving an electrical signal output by the adjustment conversion module (1) and The signals respectively drive the plurality of groups of LED lamps (3) to perform corresponding actions; the timing unit (22) starts accumulating timing from the control unit (21) after receiving the electrical signal, and stops counting until the accumulated time value reaches a preset value. ,among them,

During the accumulated timing, the control unit (21) converts the received electrical signal into a corresponding driving signal to adjust the operation of the plurality of sets of LED light groups (3) in real time, and obtains corresponding color temperature values by color mixing;

When the accumulated time value reaches the preset value, the control unit (21) transmits the duty ratio value of the plurality of groups of LED lamp groups (3) to the storage unit (23) for overwriting and storing;

After the timing unit (22) stops counting, the control unit (21) outputs corresponding driving signals to the LED lamp groups (3) in real time according to the received duty value according to the duty value stored in the storage unit (23). The brightness of the LED lamp group (3) is adjusted and a constant color temperature value is maintained.
The LED lamp system of claim 1 , wherein the control unit is (21) The respective drive signals are respectively output to the respective LED lamp groups (3) according to the duty value stored in the storage unit (23).
The LED lamp system of the stepless color temperature and brightness adjustment according to claim 1 or 2, wherein the processing module (2) further comprises a detecting unit electrically connected to the control unit (21) ( 24), wherein the detecting unit (24) is configured to detect a real-time working state of the control unit (21), wherein the working state of the control unit (21) includes a closed state, a dimming state, and a constant state.
A method for controlling a stepless color temperature and brightness adjusted LED lamp system according to any one of claims 1 to 3, characterized in that it comprises the following steps:

S1. Turn on the switch of the external power supply to activate the adjustment conversion module and the processing module;

S2. The adjustment conversion module (1) converts the alternating current input from the external power supply to the output chopping alternating current, wherein the size of the output chopping alternating current is manually adjusted, and the output chopping alternating current is rectified and outputted by the corresponding electric signal. To the processing module (2), at the same time, the processing module (2) detects whether a duty value is stored in the storage unit (23);

S3. If the relevant duty ratio value is not detected in the storage unit (23), the timing unit (22) starts accumulating timing from the receipt of the electrical signal by the control unit (21), wherein during the accumulated timing, the control unit ( 21) output corresponding driving signals to the plurality of groups of LED lamp groups (3) in real time according to the received electrical signal changes to adjust the operation of the plurality of groups of LED lamp groups (3) to obtain corresponding color temperature values by color mixing;

If it is detected that there is an associated duty ratio value in the storage unit (23), the control unit (21) converts the received electrical signal into a corresponding driving signal with the stored duty value to output to each LED light group ( 3), and the timing unit (22) starts accumulating timing from when the control unit (21) receives the electric signal, and during the accumulated timing, when the electric signal received by the control unit (21) does not change, the plurality of sets of LED lights are caused. Group (3) maintains a constant color temperature value. Conversely, when the electrical signal received by the control unit (21) changes, the control unit (21) outputs corresponding driving signals to the plurality of sets of LED light groups (3) in real time, so that The color mixture obtains a corresponding color temperature value;

S4. When the accumulated time value reaches the preset value, the timing unit (22) stops counting and the control unit (21) transmits the duty value of the plurality of groups of LED light groups (3) to the storage unit (23) for overwriting and storing; After the timer is stopped, the control unit (21) converts the received electrical signal into a corresponding driving signal by using the duty value to output to each LED lamp group (3), thereby realizing brightness adjustment of the plurality of LED lamp groups (3). Maintain a constant color temperature value.
The method for controlling a stepless color temperature and brightness adjustment LED lamp system according to claim 5, wherein when a plurality of sets of LED lamp groups (3) are required to stop working, the external power supply switch is turned off. The LED lamp group (3) is stopped. When the switch of the external power supply unit is turned on next time, the plurality of LED lamp groups (3) still maintain the color temperature value before the power is turned off.
The method for controlling a stepless color temperature and brightness adjusted LED lamp system according to claim 4 or 5, characterized in that the detecting unit (24) detects the working state of the control unit (21) in real time.