CN110730530A

CN110730530A - LED lighting device and LED lighting system

Info

Publication number: CN110730530A
Application number: CN201911014243.XA
Authority: CN
Inventors: 李水旺; 张文锋; 闵荣峰; 伍铁军
Original assignee: Shenzhen Signcomplex Co Ltd
Current assignee: Shenzhen Signcomplex Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-01-24

Abstract

The invention provides an LED lighting device which is used for being connected with a power supply to realize lighting, and the LED lighting device comprises an LED driving unit, an LED lighting unit and a dimming interface unit, wherein the LED driving unit is connected with the LED lighting unit and the power supply, the LED driving unit comprises a dimming reserved terminal, the dimming interface unit is connected to the dimming reserved terminal, the dimming interface unit comprises at least two dimming interfaces, the at least two dimming interfaces are used for being connected with different dimming controllers, and the dimming controllers can dim the LED lighting unit through the dimming reserved terminal. The invention also provides an LED lighting system comprising the LED lighting device, and a user can dim the LED lighting device and the LED lighting system through different dimming controllers, so that the LED lighting system has the advantages of rich control experience and the like.

Description

LED lighting device and LED lighting system

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of illumination, in particular to an LED illumination device and an LED illumination system.

[ background of the invention ]

The LED is called as a fourth-generation lighting source or a green light source, has the characteristics of energy conservation, environmental protection, long service life, small volume and the like, and is widely applied to products such as information displays, signal lamps, vehicle lamps, liquid crystal screen backlight sources, general lighting lamps and the like.

Referring to fig. 1, the LED lighting device 1 includes an LED driving unit 3 and an LED lighting unit 4, and the power supply unit 2 supplies power to the LED lighting unit 4 through the LED driving unit 3. All reserve on the LED drive unit 3 of current LED lighting device 1 and have 3 reserved terminals of adjusting luminance, specifically 12V + end, DIM + end and DIM-end, three reserved terminals of adjusting luminance are reserved for user's access dimmer or intelligent control ware, and the user realizes adjusting luminance to LED lighting unit 4 through dimmer or intelligent control ware. However, the existing LED lighting device 1 can only be connected to a single dimmer or a single intelligent controller, and when a user needs to perform LED dimming from multiple control terminals, such LED lighting device 1 is difficult to meet the user's requirements.

[ summary of the invention ]

In order to overcome the problems in the prior art, the invention provides an LED lighting device and an LED lighting system.

The invention provides an LED lighting device which is used for being connected with a power supply to realize lighting, and the LED lighting device comprises an LED driving unit, an LED lighting unit and a dimming interface unit, wherein the LED driving unit is connected with the LED lighting unit and the power supply, the LED driving unit comprises a dimming reserved terminal, the dimming interface unit is connected to the dimming reserved terminal, the dimming interface unit comprises at least two dimming interfaces, the at least two dimming interfaces are used for being connected with different dimming controllers, and the dimming controllers can dim the LED lighting unit through the dimming reserved terminal.

Preferably, the dimming interface unit includes a dimming signal processing unit, the dimming signal processing unit is connected to the dimming reserved terminal and the at least two dimming interfaces, the dimming signals from the at least two dimming interfaces are processed by the dimming signal processing unit to generate a secondary dimming signal, and the secondary dimming signal controls the LED lighting unit to dim light through the dimming reserved terminal.

Preferably, the dimming signal processing unit includes at least two diodes, and the dimming reserved terminal includes a DIM + terminal connected to each of the dimming interfaces through a different diode.

Preferably, the dimming reserved terminal comprises a V + terminal, a DIM + terminal and a DIM-terminal, the at least two dimming interfaces comprise a first dimming interface and a second dimming interface, the first dimming interface comprises a V1+ terminal, a DIM1+ terminal and a DIM 1-terminal, the dimming signal processing unit comprises a first diode and a second diode, the second dimming interface comprises a DIM2+ terminal and a DIM 2-terminal, the V1+ terminal is connected with the V + terminal, the DIM + terminal is respectively connected with the DIM1+ terminal and the DIM2+ terminal through the first diode and the second diode, and the DIM-terminal is connected with the DIM 1-terminal and the DIM 2-terminal.

The invention provides an LED lighting system, which comprises a dimming controller and the LED lighting device, wherein the dimming controller is connected to a dimming interface of the LED lighting device.

Preferably, the dimming controller comprises at least one intelligent controller and at least one dimmer.

Preferably, the dimming controller includes an at least intelligent control ware, the intelligent control ware includes main control unit, control signal receiving unit, dimming control unit and light detection unit all are connected with the main control unit, control signal receiving unit is used for receiving user's control signal, and light detection unit is used for detecting at least two kinds of different light in order to generate the light intensity signal, the main control unit generates the PWM signal according to light intensity signal and user's control signal, and the PWM signal process dimming control unit produces the signal of adjusting luminance, the signal of adjusting luminance passes through the interface of adjusting luminance is right LED lighting unit adjusts luminance.

Preferably, the light detection unit includes a visible light detection unit for detecting visible light and an infrared detection unit for detecting infrared light.

Preferably, the user control signal includes a set light intensity signal carrying set light intensity, when the output measurement of the LED lighting unit is zero, a calibration factor is calculated and obtained according to the light intensity signals detected by the visible light detection unit and the infrared detection unit, when the LED lighting unit is illuminated, an ambient natural light intensity is calculated and obtained according to the light intensity signals detected by the infrared detection unit and the calibration factor, and whether the illumination brightness of the LED lighting unit needs to be adjusted is determined according to a comparison result between the ambient natural light intensity and the set light intensity.

Preferably, the calibration factor is updated each time the LED lighting unit is output with a measure of zero.

Compared with the prior art, the dimming interface unit of the LED lighting device and the LED dimming system is connected to the dimming reserved terminal, the dimming interface unit comprises at least two dimming interfaces, the at least two dimming interfaces are used for connecting different dimming controllers, and a user can dim the LED lighting device through different dimming controllers. The control experience of the LED lighting device and the LED dimming system is enriched.

Through setting up the signal processing unit of adjusting luminance among the interface unit of adjusting luminance for mutual independence does not influence safe work between a plurality of dimming control wares, and still is favorable to energy-conservation.

The first interface of adjusting luminance includes V1+ terminal, DIM1+ terminal and DIM 1-terminal, and the second interface of adjusting luminance includes DIM2+ terminal and DIM 2-terminal, and first interface and the second interface of adjusting luminance just can be applicable to intelligent control ware and traditional dimmer, satisfies multiple dimming control, can cater to the demand of different user groups.

The intelligent controller provided by the invention generates a light intensity signal through the detection of at least two different lights, and the main control unit determines whether to dim the LED lighting unit or not according to the light intensity signal and the user control signal, so that the dimming accuracy influenced by LED light rays can be effectively avoided.

The light detection unit is provided with a visible light detection unit for detecting visible light and an infrared detection unit for detecting infrared rays, when the output measurement of the LED illumination unit is zero, a calibration factor is obtained through calculation according to light intensity signals detected by the visible light detection unit and the infrared detection unit, when the LED illumination unit illuminates, environment natural light intensity is obtained through calculation according to the light intensity signals detected by the infrared detection unit and the calibration factor, and whether the illumination brightness of the LED illumination unit needs to be adjusted or not is determined according to the comparison result of the environment natural light intensity and the set light intensity, so that the dimming accuracy is effectively improved, and the dimming error caused by infrared intensity difference in different regions or time is reduced. Further, updating the calibration factor each time the LED lighting unit is output with a metric of zero may further improve the accuracy of the dimming.

[ description of the drawings ]

Fig. 1 is a schematic diagram of a module structure of a conventional LED lighting device.

Fig. 2 is a schematic structural diagram of a module of an LED lighting device according to a first embodiment of the present invention.

Fig. 3 is a schematic block diagram of a dimming interface unit of an LED lighting device according to a first embodiment of the present invention.

Fig. 4 is a schematic diagram of a more specific module structure of the LED lighting device according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a module of an LED lighting system according to a second embodiment of the present invention.

Fig. 6 is a schematic block diagram of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

FIG. 7 is a diagram of an example of the relationship between the ambient natural light and the power output ratio of an LED lighting unit in a second embodiment of the LED lighting system of the present invention.

Fig. 8 is a circuit diagram of a main control unit of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

Fig. 9 is a circuit diagram of a light detection unit of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

Fig. 10 is a circuit diagram of a control signal receiving unit of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

Fig. 11 is a circuit diagram of a dimming control unit of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

Fig. 12 is a circuit diagram of a voltage stabilizing unit of a dimming controller of an LED lighting system according to a second embodiment of the present invention.

Fig. 13 is a schematic structural diagram of an LED lighting unit in an LED lighting system according to a second embodiment of the present invention.

Component names and labels:

10. an LED lighting device; 11. a power supply; 13. an LED driving unit; 15. an LED illumination unit; 17. a dimming interface unit; 171. a dimming signal processing unit; 1731. a first dimming interface; 1732. a second dimming interface; 173n, nth dimming interface; 20. an LED lighting system; 21. an intelligent controller; 23. a dimmer; 211. a main control unit; 210. a voltage stabilization unit; 213. a light detection unit; 2131. a visible light detection unit; 2133. an infrared detection unit; 215. a control signal receiving unit; 217. a dimming control unit; 151. an installation part; 153. an LED; 155. a shield ring.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2, a first embodiment of the present invention provides an LED lighting device 10, which is used to be connected to a power supply 11 for lighting, and the LED lighting device 10 may be an LED street lamp, an indoor lighting lamp, a landscape lamp, or the like.

The LED lighting device 10 includes an LED driving unit 13, an LED lighting unit 15 and a dimming interface unit 17, the LED driving unit 13 is connected to the LED lighting unit 15 and the power supply 11, the LED driving unit 13 includes a dimming reserved terminal a, the dimming interface unit 17 is connected to the dimming reserved terminal a, the dimming interface unit 17 includes at least two dimming interfaces, it can be understood that the dimming interface unit 17 may include a first dimming interface 1731, a second dimming interface 1732, · · · nth dimming interface 173n, that is, the number of the dimming interfaces may be n, n is greater than or equal to 2. At least two dimming interfaces are used to connect the same or different dimming controllers (not shown) that can dim the LED lighting unit 15 through the dimming reserved terminal a.

As a preferred embodiment, at least two dimming interfaces connecting different dimming controllers are included so that the LED lighting device 10 can be dimmed by the different dimming controllers, it being understood that dimming of the LED lighting device 10 by the different dimming controllers is performed at the same time or at different times.

Referring to fig. 2, the dimming interface unit 17 includes a dimming signal processing unit 171, the dimming signal processing unit 171 is connected to the dimming reserved terminal a and the at least two dimming interfaces, the dimming signals from the at least two dimming interfaces are processed by the dimming signal processing unit 171 to generate a sub-dimming signal, and the sub-dimming signal controls the LED lighting unit 15 to dim light through the dimming reserved terminal.

As a specific embodiment, the dimming signal processing unit 171 includes at least two diodes, and the dimming reserved terminal a is connected to each of the dimming interfaces through different diodes.

Referring to fig. 3, the dimming interface unit 17 of the present invention is illustrated as including two dimming interfaces, namely a first dimming interface 1731 and a second dimming interface 1732. The reserved terminal of adjusting luminance includes V + terminal, DIM + terminal and DIM-terminal. The first dimming interface 1731 includes a V1+ terminal, a DIM1+ terminal and a DIM 1-terminal, the second dimming interface 1732 includes a DIM2+ terminal and a DIM 2-terminal, the dimming signal processing unit 171 includes a first diode and a second diode, the V1+ terminal is connected to the V + terminal, the DIM + terminal is connected to the DIM1+ terminal and the DIM2+ terminal through the first diode and the second diode, respectively, and the DIM-terminal is connected to the DIM 1-terminal and the DIM 2-terminal.

The dimming controller accessed by the first dimming interface 1731 may be the smart controller 21, and the user may control the smart controller 21 at a close distance or a remote distance by instructing to implement dimming. The dimming controller accessed by the second dimming interface 1732 may be the dimmer 23, and the user may adjust the dimmer 23 manually to achieve dimming. It is understood that the intelligent controller 21 and the dimmer 23 may be any existing dimming controller. The dimmer 23 may be any conventional two pin/jack dimmer known in the art. It is understood that the smart controller 21 and the dimmer 23 may be any of the existing DC12V powered 0-10V output dimmers. The dimmer 23 may be any conventional 0-10V output dimmer.

When not dimming, the DIM + terminal is kept at a fixed voltage, which is illustrated as 10V. When the first dimming interface 1731 and the second dimming interface 1732 are respectively connected to the intelligent controller 21 and the dimmer 23, dimming signals output by the intelligent controller 21 and the dimmer 23 correspond to voltage signals. The dimming signal of the intelligent controller 21 and the dimmer 23 is 0-10V, when the dimming signal is 0V, the output brightness of the LED lighting unit 15 is zero, and when the dimming signal is 10V, the LED lighting unit 15 is completely turned on. Because the dimming signal processing unit 171 is a diode, the dimming signals output by the intelligent controller 21 and the dimmer 23 are transmitted to the DIM + terminal through the diode, and because of the reverse cut-off characteristic of the diode, even if the dimming signal voltages of the intelligent controller 21 and the dimmer 23 are different, no current flows between the intelligent controller 21 and the dimmer 23, and the current is not damaged. The intelligent controller 21 and the dimmer 23 pull down the voltage of the DIM + terminal to the minimum voltage corresponding to the dimming signal, for example, when the dimming signals of the intelligent controller 21 and the dimmer 23 are 7V and 5V, respectively, the DIM + terminal voltage is pulled down to 5V through the processing of the dimming signal processing unit 171, so that dimming can be realized, safe and effective work can be ensured between the brightness control dimmers, and the DIM + terminal is pulled down to the minimum voltage corresponding to the dimming signal, which is beneficial to energy conservation and controller protection.

It is understood that the dimming signal processing unit 171 can be implemented by other circuits as long as the voltage at the DIM + terminal can be pulled down to the minimum voltage corresponding to the dimming signal.

Referring to fig. 5, a second embodiment of the present invention provides an LED lighting system 20, which includes the LED lighting device 10 and the dimming controller as disclosed in the first embodiment. The dimming controller is connected to the dimming interface of the LED lighting device 10. In the present embodiment, the dimming controller includes at least one intelligent controller 21 and at least one dimmer 23. The user can control the smart controller 21 to implement dimming by instructing it to be close or remote. The user may adjust the dimmer 23 manually to achieve dimming. It is understood that the intelligent controller 21 and the dimmer 23 may be any existing dimming controller.

Referring to fig. 6, in particular, the intelligent controller 21 includes a main control unit 211, a control signal receiving unit 215, a dimming control unit 217, a light detection unit 213, and a voltage regulation unit 210, where the voltage regulation unit 210 is connected to the main control unit 211 and is configured to receive a power signal to supply power to the intelligent controller 21. The control signal receiving unit 215, the dimming control unit 217 and the light detection unit 213 are all connected with the main control unit 211, the control signal receiving unit 215 is used for receiving a user control signal, the light detection unit 213 is used for detecting at least two different lights to generate a light intensity signal, the main control unit 211 generates a PWM signal according to the light intensity signal and the user control signal, the PWM signal passes through the dimming control unit 217 to generate a dimming signal, and the dimming signal is used for dimming the LED lighting unit 15 through the dimming interface. In one embodiment, the dimming signal is an analog dimming signal, and further is a 0-10V analog signal.

It is understood that the user control signal received by the control signal receiving unit 215 includes a set light intensity signal carrying a set light intensity, which can be set by the user.

It is understood that the light detecting unit 213 is used for detecting at least two different lights to generate the light intensity signal, and the at least two different lights include at least a visible light and a specific light, which is a light unique to the natural light but not included in the LED light, such as an infrared ray. The present invention will be described with reference to infrared rays. The light detection unit 213 includes a visible light detection unit 2131 for detecting visible light and an infrared light detection unit 2133 for detecting infrared light.

The LED lighting system 20 determines whether to dim the LED lighting unit 15 according to the intensity of the ambient natural light, which belongs to the visible light and can be detected by the visible light detection unit 2131, however, under the condition that the LED lighting unit 15 is turned on, the visible light detection unit 2131 detects the visible light not only including the ambient natural light but also including the LED light emitted by the LED lighting unit 15, and at this time, the visible light detection unit 2131 cannot obtain the actual intensity of the ambient natural light. In the present invention, the infrared detection unit 2133 is arranged, and the infrared detection unit 2133 detects the light intensity of infrared rays in sunlight in the current environment to reverse the light intensity of natural light in the current environment. Specifically, when the output metric of the LED lighting unit 15 is zero, a calibration factor R is calculated according to the light intensity signals detected by the visible light detecting unit 2131 and the infrared detecting unit 2133, and as an embodiment R, the ratio of the light intensity signals detected by the visible light detecting unit 2131 and the infrared detecting unit 2133 is obtained. When the LED lighting unit 15 is lighting, the ambient natural light intensity is calculated according to the light intensity signal detected by the infrared detecting unit 2133 and the calibration factor, and as an embodiment, the ambient natural light intensity is a product of the light intensity signal detected by the infrared detecting unit 2133 and the calibration factor R. The main control unit 211 determines whether the illumination brightness of the LED illumination unit 15 needs to be adjusted according to the comparison result between the ambient natural light intensity and the set light intensity.

As a preferred embodiment, the calibration factor is updated each time the LED lighting unit 15 is output with a measure of zero.

It can be understood that the dimming is performed when the difference between the ambient natural light intensity and the set light intensity exceeds the set threshold. The ambient natural light intensity is related to the LED lighting unit 15 output power, which may be related as shown in fig. 7. The abscissa is the ambient natural light intensity, and the ordinate is the power ratio output by the LED lighting unit 15. It will be appreciated that the manner in which the ambient natural light intensity is related to the output power of the LED lighting unit 15 is not limited.

As another embodiment, the main control unit 211 determines whether dimming is required directly according to the comparison result between the ambient natural light intensity detected by the visible light detection unit 2131 and the set light intensity.

Referring to fig. 8, a specific circuit implementation of the main control unit 211 is provided, it is understood that the circuit is only one of the circuit design schemes of the main control unit 211, and is not limited thereto. The main control unit 211 comprises a chip U2 and a programming port J2, the programming port J2 comprises 5 pins, wherein the 1 st pin and the 5 th pin are respectively grounded and receive a first voltage signal, and the value of the first voltage signal is + 5V. The DAT pin (pin 2) is used to connect with chip U2 to transmit data. The CLK pin and the RST pin are both connected to chip U2.

Chip U2 has 20 pins as follows:

PWM pin (pin 1): a pin for connecting the dimming control unit 217, the pin outputting a PWM signal for dimming;

PH AD1 pin (pin 2) and PH AD2 pin (pin 3): a visible light detection unit 2131 and an infrared detection unit 2133;

RST pin (pin 4): the reset pin is used for being connected with a pin 2 of a burning port J2;

GND pin (pin 7): grounding;

DAT pin (pin 8): the device is used for being connected with a pin 4 of a burning port J2 for data transmission;

power supply pin (pin 9): the circuit is used for switching in a first voltage signal to supply power to the chip U2;

vacant pins (

pins

5, 6, 11-17 and 19): in an idle state;

CLK pin (pin 18): the device is used for being connected with a burning port J2 pin 3, which is a clock pin;

IRM pin (pin 20): for connection with the control signal receiving unit 215.

Further, pin 5 of the programming port J2 and pin 9 of the chip U2 are grounded through capacitors C6 and C7.

The reset circuit comprises a resistor R1 and a capacitor C5 which are connected in series, wherein one end of the resistor R1 is connected with a first voltage signal, and one end of the capacitor C5 is grounded. The junction of the resistor R1 and the capacitor C5 forms a node B, which is connected to pin 2 of the programming port J2 and pin 4 of the chip U2.

Referring to fig. 9, a specific circuit implementation of the light detecting unit 213 is provided, and it is understood that the circuit is only one of the circuit designs of the light detecting unit 213, and is not limited thereto. The photo detection unit 213 includes a visible light detection unit 2131 and an infrared detection unit 2133, the visible light detection unit 2131 includes a visible light sensing diode PH1 and a resistor R9 connected in series, one end of the visible light sensing diode PH1 is connected to the first voltage signal, and one end of the resistor R9 is connected to ground. The capacitor C11 is connected in parallel with the resistor R9. The junction of the visible light photodiode PH1 and the resistor R9 forms a node C, which is connected to pin 2 of the chip U2 and transmits the detected visible light intensity signal to the chip U2. The ir detecting unit 2133 includes an ir photo diode PH2 and a resistor R10 connected in series, wherein one end of the ir photo diode PH2 is connected to the first voltage signal, and one end of the resistor R10 is connected to ground. The capacitor C12 is connected in parallel with the resistor R10. The junction of the infrared photodiode PH2 and the resistor R10 forms a node D, which is connected to pin 3 of the chip U2, and transmits the detected infrared light intensity signal to the chip U2.

Referring to fig. 10, a specific circuit implementation of the control signal receiving unit 215 is provided, it is understood that the circuit is only one of the circuit design schemes of the control signal receiving unit 215, and is not limited thereto. The control signal receiving unit 215 includes an ir receiving head U3 having 3 pins, a 1 st pin of which is connected to the pin 20 of the U2 of the chip, a 2 nd pin of which is grounded, a 3 rd pin of which is connected to the first terminals of the capacitor C1 and the resistor R11, a second terminal of the capacitor C1 is grounded, a second terminal of the resistor R11 and a first terminal of the resistor R12 are connected to the first voltage signal, and a second terminal of the resistor R12 is connected to the 1 st pin of the ir receiving head U3. The infrared receiving head U3 receives user control signals from a user, and the user control signals are sent by a remote controller, an electronic device, or the like.

Referring to fig. 11, a specific circuit implementation of the dimming control unit 217 is provided, and it is understood that the circuit is only one of the circuit design schemes of the dimming control unit 217, and is not limited thereto. The dimming control unit 217 includes an amplifying chip U4 having 8 pins, the 1 st pin is shorted to the 6 th pin, and the first ends of the resistors R7 and R8 are connected; the 2 nd pin is connected to the second end of the resistor R7 and the first end of the resistor R6, and the second end of the resistor R6 is grounded; the 3 rd pin is connected with resistors R4 and R5 in series, the serial connection point of the resistors R4 and R5 is grounded through a capacitor C8, the other end of the resistor R4 is connected with a pin 1 of a chip U2, the 4 th pin and the 8 th pin are grounded and a second voltage signal respectively, the second voltage signal is +12V, and the 8 th pin is grounded through capacitors C9 and C10 which are connected in parallel; a node E is formed between resistors R2 and R3 connected in series between the second voltage signal and ground, and the node E is connected to the 5 th pin. The second end of the resistor R8 is connected to the first end of the transistor Q1, the first end of the transistor Q1 is used for connecting the DIM1+ on the first dimming interface 1731, that is, the first end outputs a dimming signal, and the base of the transistor Q1 is connected to the 7 th pin of the amplifying chip U4 through the resistor R9.

It can be understood that the PWM signal is filtered by the filter circuit composed of R4 and C8, and then the digital signal is converted into an analog signal, and then amplified by the amplifier chip U4 and the transistor Q1 to generate the dimming signal. It is understood that the type of the amplifying chip and the peripheral circuit can be configured as required. The circuit can effectively simplify signal processing and simultaneously minimize the cost of circuit configuration.

Referring to fig. 12, the voltage regulation unit 210 includes a socket J1 and a voltage regulation chip U1, the voltage regulation chip U1 performs voltage regulation and voltage reduction on the output voltage at the V + terminal to a first voltage corresponding to a first voltage signal, and the voltage regulation chip U1 converts +12V to + 5V.

Pins

2 and 3 of socket J1 are connected to ground, and pin 1 is used to connect to DIM 1-terminal of first dimming interface 1731. Pin 4 of the socket J1 and pin 3 of the regulator chip U1 are connected to the V + terminal of the dimming interface, and the V + terminal outputs a voltage of +12V in this embodiment. Pin 3 (input) of U1 is also grounded through parallel capacitors C1 and C2, pin 2 of U1 is grounded, pin 1 (output) of U1 outputs the first voltage signal, and is grounded through parallel capacitors C3 and C4, and its output is connected to chip U2 for supplying power.

Referring to fig. 12, as an embodiment of the LED lighting unit 15, the LED lighting unit 15 includes an LED lamp 150, the LED lamp 150 includes a mounting portion 151, and a plurality of LEDs 153 are disposed on the mounting portion 151. Preferably, the LED mounting portion 151 is a spherical structure, and the spherical surface protrudes towards the light emitting direction, the light detecting unit 213 is disposed on the LED mounting portion 151, and the LED153 surrounds the light detecting unit 213. Preferably, the light detection unit 213 is mounted in a light-blocking ring 155, and the light-blocking ring 155 is fixed to the mounting portion 151 and protrudes from the mounting portion 151. The provision of the light shielding ring 155 reduces the possibility that the light emitted from the LED is detected by the visible light detecting unit 2131.

As a modification, the light detection unit 213 may be disposed at any position of the LED lighting device 10. Preferably, it is arranged on the side of the LED lighting device 10 facing away from the light exit surface.

It is to be understood that the specific circuit of the intelligent controller is not limited, and it may also perform the ambient natural light sensing only through the visible light detecting unit 2131.

It is understood that the calibration factor may be obtained by software operation, or may be obtained by a divider. The calculation of the ambient natural light according to the intensity of the infrared light can be realized by software operation and can also be realized by a multiplier. The comparison between the natural light intensity of the environment and the set light intensity can be realized through software calculation or a comparator.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. An LED lighting device, it is used for connecting with power supply in order to realize illumination, its characterized in that: the LED lighting device comprises an LED driving unit, an LED lighting unit and a dimming interface unit, wherein the LED driving unit is connected with the LED lighting unit and the power supply, the LED driving unit comprises a dimming reserved terminal, the dimming interface unit is connected onto the dimming reserved terminal, the dimming interface unit comprises at least two dimming interfaces, the at least two dimming interfaces are used for connecting different dimming controllers, and the dimming controllers can pass through the dimming reserved terminal and are used for dimming the LED lighting unit.

2. The LED lighting device of claim 1, wherein: the dimming interface unit comprises a dimming signal processing unit, the dimming signal processing unit is connected with the dimming reserved terminal and the at least two dimming interfaces, dimming signals from the at least two dimming interfaces generate secondary dimming signals after being processed by the dimming signal processing unit, and the secondary dimming signals control the LED lighting unit to dim light through the dimming reserved terminal.

3. The LED lighting device of claim 1, wherein: the dimming signal processing unit comprises at least two diodes, the dimming reserved terminal comprises a DIM + terminal, and the DIM + terminal is connected to each dimming interface through different diodes.

4. The LED lighting device of claim 2, wherein: the reserved terminal of adjusting luminance includes V + terminal, DIM + terminal and DIM-terminal, and at least two interfaces of adjusting luminance include first interface and the second interface of adjusting luminance, first interface of adjusting luminance includes V1+ terminal, DIM1+ terminal and DIM 1-terminal, the signal processing unit of adjusting luminance includes first diode and second diode, and the second interface of adjusting luminance includes DIM2+ terminal and DIM 2-terminal, V1+ terminal connection V + terminal, DIM + terminal respectively through first diode and second diode with DIM1+ terminal and DIM2+ terminal are connected, and DIM-terminal is connected with DIM 1-terminal and DIM 2-terminal.

5. An LED lighting system characterized by: the LED lighting device comprises a dimming controller and the LED lighting device as claimed in any one of claims 1 to 4, wherein the dimming controller is connected to a dimming interface of the LED lighting device.

6. The LED illumination system of claim 5, wherein: the dimming controller comprises at least one intelligent controller and at least one dimmer.

7. The LED illumination system of claim 5, wherein: the dimming controller comprises at least one intelligent controller, the intelligent controller comprises a main control unit, a control signal receiving unit, a dimming control unit and an optical detection unit, the control signal receiving unit, the dimming control unit and the optical detection unit are all connected with the main control unit, the control signal receiving unit is used for receiving user control signals, the optical detection unit is used for detecting at least two different lights to generate light intensity signals, the main control unit generates PWM signals according to the light intensity signals and the user control signals, the PWM signals pass through the dimming control unit generates dimming signals, and the dimming signals pass through the dimming interface is right the LED lighting unit performs dimming.

8. The LED illumination system of claim 7, wherein: the light detection unit includes a visible light detection unit for detecting visible light and an infrared detection unit for detecting infrared light.

9. The LED illumination system of claim 8, wherein: the user control signal comprises a set light intensity signal carrying set light intensity, when the output measurement of the LED illumination unit is zero, a calibration factor is obtained through calculation according to light intensity signals detected by the visible light detection unit and the infrared detection unit, when the LED illumination unit illuminates, environment natural light intensity is obtained through calculation according to the light intensity signals detected by the infrared detection unit and the calibration factor, and whether the illumination brightness of the LED illumination unit needs to be adjusted or not is determined according to a comparison result of the environment natural light intensity and the set light intensity.

10. The LED illumination system of claim 9, wherein: the calibration factor is updated each time the LED lighting unit is output with a measure of zero.