CN210670672U

CN210670672U - Dimmable LED lamp

Info

Publication number: CN210670672U
Application number: CN201920861506.XU
Authority: CN
Inventors: 孙胜利; 姜兆宁; 刘达平
Original assignee: Qingdao Yeelink Information Technology Co Ltd
Current assignee: Qingdao Yilai Intelligent Technology Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-06-02
Anticipated expiration: 2029-06-10

Abstract

The utility model discloses a dimmable LED lamp, which comprises a light-emitting component connected with a constant current power supply and a control module connected with the light-emitting component; the light-emitting assembly comprises a first LED lamp and a second LED lamp which are connected in parallel, wherein the first LED lamp and the second LED lamp are LED lamps with different color temperatures; the control module is used for controlling the first LED lamp and the second LED lamp to be turned on and off by sending a first PWM signal to the first switch piece and sending a second PWM signal to the second switch piece, and adjusting the brightness of the first LED lamp and the brightness of the second LED lamp through a PWM duty ratio. The utility model provides a LED lamps and lanterns of can adjusting luminance and the regulation of colour temperature of LED lamp can be realized simultaneously to the LED lamps and lanterns of can adjusting luminance of this application, and simple structure, easily realize, need not with the help of devices such as other resistances, have reduced the power consumption of other devices, reduce the manufacturing cost and the use cost of LED lamp.

Description

Dimmable LED lamp

Technical Field

The utility model relates to the technical field of lighting fixtures, especially, relate to a LED lamps and lanterns can adjust luminance.

Background

With the development of modernization, the lamplight is widely applied to environments such as household illumination, urban night scene decoration and the like. The preference of users on the light color temperature under different environments is determined by people, and the requirements of urban night scene decoration on the light color temperature also change from moment to moment. For example, people tend to prefer cool light when the ambient temperature is higher, and may prefer warm light when the ambient temperature is lower. Therefore, only one color temperature lighting lamp cannot meet the requirements of users.

The lamps capable of adjusting color temperature also exist in the current market, the lamp structure is complex, the energy conversion efficiency is low, the manufacturing cost of the whole lamp is very high, the popularization of the market in a large area is not facilitated, and the mainstream consciousness form of energy conservation and environmental protection is not met at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a LED lamps and lanterns can adjust luminance has solved that colour temperature adjustable lamps and lanterns framework is complicated, and manufacturing cost is high, problem that energy conversion efficiency is low.

In order to solve the technical problem, the utility model provides a dimmable LED lamp, which comprises a light-emitting component connected with a constant current power supply and a control module connected with the light-emitting component;

the light-emitting component comprises at least a first LED lamp, a first switch piece connected with the first LED lamp in series, a second LED lamp and a second switch piece connected with the second LED lamp in series, and the first LED lamp and the second LED lamp are LED lamps with different color temperatures;

the first end of the first LED lamp is connected with the input end of the constant current power supply, and the second end of the first LED lamp is connected with the first end of the first switch piece; the second end of the first switch piece is grounded, and the third end of the first switch piece is connected with the first output end of the control module;

the first end of the second LED lamp is connected with the input end of the constant current power supply, and the second end of the second LED lamp is connected with the first end of the second switch piece; the second end of the second switch piece is grounded, and the third end of the second switch piece is connected with the second output end of the control module;

the control module is used for sending a first PWM signal to the first switch piece through a first output end of the control module, controlling the connection and disconnection of a first end and a second end of the first switch piece, and controlling the brightness of the first LED lamp through a first PWM duty ratio;

the control module is also used for sending a second PWM signal to the second switch piece through a second output end of the control module, controlling the connection and disconnection of a first end and a second end of the second switch piece, and controlling the brightness of the second LED lamp through a second PWM duty ratio.

The first LED lamp is a cold white LED lamp; the second LED lamp is a warm white LED lamp.

The first switch piece and the second switch piece are both NMOS tubes, the first ends of the first switch piece and the second switch piece are the D poles of the NMOS tubes, the second ends of the first switch piece and the second switch piece are the S poles of the NMOS tubes, and the third ends of the first switch piece and the second switch piece are the G poles of the NMOS tubes.

Wherein, the control module group still includes the wireless communication module who is used for receiving the instruction of adjusting luminance.

The LED color lamp also comprises a plurality of LED color lamps with different light-emitting colors and a linear constant current driver;

the first end of each LED colored lamp is connected with a power supply output end in parallel, the second end of each LED colored lamp is connected with the linear constant current driver, and the linear constant current driver is connected with the control module;

the linear constant current driver controls the on and off of each LED colored lamp through the control signal sent by the control module.

The high-voltage constant-current driver comprises a rectifier bridge, a high-voltage constant-current driver and a first DC-DC converter, wherein the rectifier bridge is connected with an alternating current power supply;

the output end of the rectifier bridge is connected with the high-voltage constant-current driver and the input end of the first DC-DC converter; the output end of the high-voltage constant-current driver is electrically connected with the first ends of the first LED lamp and the second LED lamp; the input end of the first DC-DC converter is electrically connected with the first end of the LED colored lamp and the input end of the control module.

And a second DC-DC converter is also arranged between the second DC-DC converter and the control module.

The utility model provides an among the LED lamps and lanterns of can adjusting luminance, including first LED lamp and the second LED lamp of parallel connection and colour temperature difference, two sets of LED lamps pass through the first PWM signal and the second PWM signal of two output outputs of control module group and adjust control respectively, that is to say also that two sets of LED can mutually independent control. And because the light brightness of the first LED lamp and the second LED lamp can be respectively adjusted through the first PWM duty ratio and the second PWM duty ratio, the light with different color temperatures and different brightness can be obtained through the mixed adjustment of different luminous brightness of the first LED lamp and the second LED lamp.

The circuit structure in this application can realize the regulation of the luminance and the colour temperature of LED lamp simultaneously, and simple structure, easily realizes, except the LED lamp, need not with the help of devices such as other resistances, has reduced the power consumption of other devices, and then reduces the manufacturing cost and the use cost of LED lamp, is favorable to the wide use of LED lamp.

Drawings

In order to clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a circuit structure of a dimmable LED lamp provided in an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of another dimmable LED lamp provided in the embodiment of the present invention.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, fig. 1 is the embodiment of the utility model provides a circuit structure schematic diagram of LED lamps and lanterns can adjust luminance, this adjustable LED lamp can include:

the device comprises a light emitting component 2 connected with a constant current power supply 1 and a control module 3 connected with the light emitting component 2;

the light emitting assembly comprises at least a first LED lamp D1, a first switching element Q1 connected with the first LED lamp D1 in series, a second LED lamp D2 and a second switching element Q2 connected with the second LED lamp D2 in series, wherein the first LED lamp D1 and the second LED lamp D2 are LED lamps with different color temperatures;

specifically, the first LED lamp D1 may be a cool white LED lamp; the second LED lamp D2 is a warm white LED lamp.

A first end of the first LED lamp D1 is connected to the input end of the constant current source 1, and a second end thereof is connected to the first end of the first switching element Q1.

A second terminal of the first switching element Q1 is grounded, and a third terminal is connected with a first output terminal of the control module 3.

A first end of the second LED lamp D2 is connected to the input terminal of the constant current source 1, and a second end thereof is connected to the first end of the second switching element Q2.

A second terminal of the second switching element Q2 is grounded, and a third terminal is connected to a second output terminal of the control module 3.

The control module 3 is configured to send a first PWM signal to the first switching device Q1 through a first output terminal of the control module 3, control the on and off of the first terminal and the second terminal of the first switching device Q1, and control the light emitting brightness of the first LED lamp D1 through a first PWM duty ratio;

the control module 3 is further configured to send a second PWM signal to the second switching device Q2 through a second output terminal of the control module 3, control the connection and disconnection of the first terminal and the second terminal of the second switching device Q2, and control the light emitting brightness of the second LED lamp D2 through a second PWM duty ratio.

It should be noted that PWM is an acronym of pulse width modulation, and a PWM signal is a pulse square wave signal that outputs a high level part of time and a low level part of time in one dimming cycle, and the switching device is usually controlled to be opened and closed by the high and low levels of its output. For example, when the first PWM signal and the second PWM signal output a high level, the first terminal and the second terminal of both the first switching element Q1 and the second switching element Q2 are turned on; on the contrary, when the first PWM signal and the second PWM signal output high level, both the two switch pieces are switched off. The PWM duty is a ratio of a high level time of a square wave to a period in the PWM signal, and is, for example, 50% for a 1s high level and a 1s low level.

As can be seen from fig. 1, when the first PWM is at a high level, the first terminal and the second terminal of the first switch device Q1 are turned on, the circuit of the constant current power supply 1, the first LED lamp D1, the first switch device Q1 and the ground terminal is turned on, and the first LED lamp D1 is turned on; on the contrary, when the first PWM is at a low level and the first terminal and the second terminal of the first switching element Q1 are turned off, the first LED lamp is turned off.

The dimming frequency of the PWM signal is generally not less than 1KHZ, that is, the duration of the dimming cycle of the first LED lamp D1 is turned on and off is not more than 10 ms. Due to the visual delay effect of human eyes, even if the first LED lamp D1 has a short extinguishing process, human eyes cannot distinguish the first LED lamp D1. And the first PWM duty cycle, i.e. the ratio of the emitting time of the first LED lamp during a dimming period, determines the brightness of the light emitted from the first LED lamp D1 visible to human eyes.

Similarly, the second LED lamp D1 connected in parallel with the first LED lamp D1 has the same working principle, and is not described herein again.

Because the color temperatures of the first LED lamp D1 and the second LED lamp D2 are different, the control module 3 can control the first LED lamp D1 and the second LED lamp D2 to be turned on and off respectively according to actual needs during specific use. For example, when light with a relatively cold color is required, if the first LED lamp D1 is a cold white lamp and the second LED lamp D2 is a warm white lamp, the first PWM duty ratio of the cold white lamp can be increased, and the second PWM duty ratio of the warm white lamp can be decreased, so that light with multiple color temperatures between two color temperatures can be obtained by mixing the light with two color temperatures; in addition, if the brightness of the whole light is dark, the first PWM duty ratio and the second PWM duty ratio can be increased simultaneously, the proportion of the first PWM duty ratio and the second PWM duty ratio is kept unchanged, and therefore the light emitting brightness of the LED lamp can be adjusted on the basis of keeping the color temperature. In a word, the color temperature of the LED lamp can be adjusted by adjusting the proportion of the first PWM duty ratio and the second PWM duty ratio, and the brightness of the LED lamp can be adjusted by adjusting the sizes of the first PWM duty ratio and the second PWM duty ratio.

Additionally, the utility model discloses in do not get rid of the embodiment that has more LED lamps that the group has different colour temperatures, explain only with the LED lamp that only has two kinds of colour temperatures as the example in this embodiment, can also parallelly connected insert the LED lamp of more different colour temperatures in this embodiment, theory of operation and first LED lamp, second LED lamp the same can, the common mix of light that can realize a plurality of LED lamps is adjusted luminance for the regulation of light colour temperature and luminance is more exquisite.

The LED lamps and lanterns of can adjusting luminance in this application can realize the regulation of light colour temperature and luminance simultaneously, and simple structure, easily realize, except the LED lamp, need not with the help of devices such as other resistances, have reduced the power consumption of other devices, and then reduce the manufacturing cost and the use cost of LED lamps and lanterns, are favorable to the wide use of LED lamps and lanterns.

Optionally, in a specific embodiment of the present invention, the method may further include:

the first switching element Q1 and the second switching element Q2 are both NMOS tubes; and the number of the first and second electrodes,

the first ends of the first switching element Q1 and the second switching element Q2 are both D poles of NMOS transistor,

the second terminals of the first switching element Q1 and the second switching element Q2 are both the S-poles of NMOS transistors,

the third terminals of the first switching element Q1 and the second switching element Q2 are the G poles of NMOS transistors.

It should be noted that, based on the above embodiments, there are many options for the first switching element Q1, and mainly different types of transistors can be selected. In consideration of frequent turning on and off of the first terminal and the second terminal of the first switching element Q1 in the present embodiment, an NMOS transistor may be optionally used.

The NMOS tube is switched off and on under the control of the PWM signal, so that no dead zone is generated, the NMOS tube can adapt to the PWM signal with higher dimming frequency, and the light of the LED lamp is finer and smoother. For example, for an NMOS transistor, when the dimming frequency of the PWM signal is as high as 10KHZ, the PWM duty cycle thereof may still be less than 15%; therefore, the NMOS tube is used as a switch element, the light-adjusting frequency range which can be modulated for light rays is larger, the higher the light-adjusting frequency is, the softer the light rays emitted by the light-adjusting device is, and the less the damage to human eyes is; and the NMOS tube can adapt to high-frequency dimming frequency, thereby being beneficial to improving the visual experience of users and being more healthy and environment-friendly. In addition, the NMOS tube has low use cost, and the cost of the device is favorably reduced.

Optionally, in another specific embodiment of the present invention, the method may further include:

the control module 3 further comprises a wireless communication module for receiving the dimming command.

The wireless communication module is arranged in the control module 3, so that the LED lamp can be communicated with the network. The user can control the LED lamp in modes of remote control, mobile phone APP software and the like, and convenience is brought to the user for intelligent control of the LED lamp.

Based on above-mentioned arbitrary embodiment, in the utility model discloses a further embodiment, as shown in fig. 2, fig. 2 is the embodiment of the utility model provides a circuit structure schematic diagram of another LED lamps and lanterns of can adjusting luminance, this adjustable LED lamp can include:

the first LED lamp D1 is a cold white LED lamp; the second LED lamp D2 is a warm white LED lamp.

Further comprising:

a plurality of LED colored lamps 7 with different luminous colors and a linear constant current driver 4;

the first end of each LED colored lamp 7 is connected with the output end of a power supply in parallel, the second end of each LED colored lamp is connected with a linear constant current driver 4, and the linear constant current drivers 4 are connected with the control module 3;

the linear constant current driver 4 controls the on and off of each LED colored lamp 7 through the control signal sent by the control module 3.

In consideration of practical application of the LED lamp, besides the color temperature and brightness of the light, the color of the light needs to be adjusted. For this reason, in the present embodiment, white lamps with different color temperatures and colored lamps with different colors are simultaneously integrated in the LED lamp.

Specifically, three kinds of LED color lamps 7, such as a red LED lamp, a green LED lamp, and a blue LED lamp, may be used. For example, when red light is required, the control module 3 may control the red LED lamp to light up through the linear constant current driver 4. However, the power of the LED color lamp is generally low, and the emitted light is also dark, so that the red LED lamp can be turned on and the cold-white LED lamp can be controlled to be turned on at the same time, so as to improve the brightness of red light.

a rectifier bridge 11 connected with an alternating current power supply, a high-voltage constant-current driver 12 connected with the rectifier bridge 11 and a first DC-DC converter 5;

the output end of the rectifier bridge 11 is connected with the high-voltage constant-current driver 12 and the input end of the first DC-DC converter 5; the output end of the high-voltage constant-current driver 12 is electrically connected with the first ends of the first LED lamp D1 and the second LED lamp D2; the input end of the first DC-DC converter 5 is electrically connected with the first end of the LED colored lamp 7 and the input end of the control module 3.

As described above, the power supplies of the first LED lamp Q1 and the second LED lamp Q2 are the constant current power supply 1. The constant current power supply 1 can convert alternating current into direct current through the rectifier bridge 11, and then process the direct current through the high-voltage constant current driver 12 to obtain the constant current power supply.

The LED color lamp 7 requires different voltage for its operation than the white LED lamp. Therefore, the voltage at the output end of the rectifier bridge 11 can be converted by the first DC-DC converter 5 to obtain the voltage meeting the working requirement of the LED color lamp 7, and the linear constant current driver 4 is connected in series with the LED color lamp 7 to obtain the current required by the working of the LED color lamp 7.

Further, the control module 3 has an operating voltage different from that of the LED color lamp 7, and for this reason, the voltage at the output terminal of the first DC-DC converter 5 may be further converted by the second DC-DC converter 6 to obtain an operating voltage suitable for the control module 3.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

Claims

1. A dimmable LED lamp is characterized by comprising a light emitting component connected with a constant current power supply and a control module connected with the light emitting component;

2. The dimmable LED light fixture of claim 1, wherein the first LED lamp is a cold white LED lamp; the second LED lamp is a warm white LED lamp.

3. The dimmable LED lamp of claim 2, wherein the first and second switching elements are NMOS transistors, the first ends of the first and second switching elements are D-poles of the NMOS transistors, the second ends of the first and second switching elements are S-poles of the NMOS transistors, and the third ends of the first and second switching elements are G-poles of the NMOS transistors.

4. The dimmable LED light fixture of claim 1, wherein the control module further comprises a wireless communication module for receiving dimming instructions.

5. The dimmable LED lamp of any one of claims 1 to 4, further comprising a plurality of LED color lamps of different emission colors and a linear constant current driver;

6. The dimmable LED lamp of claim 5, further comprising a rectifier bridge connected to an ac power source, a high voltage constant current driver connected to the rectifier bridge, and a first DC-DC converter;

7. The dimmable LED lamp of claim 6, further comprising a second DC-DC converter disposed between the first DC-DC converter and the control module.