CN211509345U

CN211509345U - Brightness control dimmer and LED lighting system

Info

Publication number: CN211509345U
Application number: CN201921792913.6U
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: 2020-09-15
Anticipated expiration: 2029-10-23

Abstract

The utility model provides a brightness control dimmer for be connected with LED lighting device and adjust luminance in order to LED lighting device, brightness control dimmer includes the main control unit, is used for receiving user control signal's control signal receiving unit, the control unit and the light detection unit of adjusting luminance, control signal receiving unit, the control unit and the light detection unit of adjusting luminance all are connected with the main control unit, the control unit of adjusting luminance be used for with LED lighting device connects in order to adjust luminance to it, the light detection unit includes visible light detection unit and infrared ray detection unit, and the visible light detection unit is used for detecting the visible light in order to produce visible light intensity signal, and infrared ray detection unit is used for detecting the infrared ray and produces infrared light intensity signal. The utility model also provides an include the LED lighting system of brightness control light modulator, it has the degree of accuracy advantage such as high of adjusting luminance.

Description

Brightness control dimmer and LED lighting system

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of lighting, especially, relate to a brightness control dimmer and LED lighting 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 the user and are inserted the brightness control dimmer, and the user realizes adjusting luminance to LED lighting unit 4 through the brightness control dimmer. However, the existing brightness control dimmer has the problem of poor dimming effect.

[ Utility model ] content

For overcoming the problems in the prior art, the utility model provides a brightness control dimmer and LED lighting system.

The utility model provides a brightness control dimmer for be connected with LED lighting device and adjust luminance in order to LED lighting device, brightness control dimmer includes the main control unit, is used for receiving user control signal's control signal receiving unit, the control unit and the light detection unit of adjusting luminance, control signal receiving unit, the control unit and the light detection unit of adjusting luminance all are connected with the main control unit, the control unit of adjusting luminance be used for with LED lighting device connects in order to adjust luminance to it, the light detection unit includes visible light detection unit and infrared ray detection unit, and the visible light detection unit is used for detecting the visible light in order to produce visible light intensity signal, and infrared ray detection unit is used for detecting the infrared ray and produces infrared light intensity signal.

Preferably, the main control unit comprises a control chip with a model number N76E 003.

Preferably, the dimming control unit comprises an amplification chip U4, a filter circuit and a triode Q1, the filter circuit and the triode Q1 are both connected with the amplification chip U4, the main control unit sends out a PWM signal, the PWM signal converts a digital signal into an analog signal through the filter circuit, and the analog signal is amplified through the amplification chip U4 and a triode Q1 to generate a 0-10V dimming signal.

Preferably, the visible light detection unit includes a visible light sensing diode PH1, a resistor R9 and a capacitor C11, the visible light sensing diode PH1 and the resistor R9 are connected in series, one end of the visible light sensing diode PH1 is used for receiving a first voltage signal, one end of the resistor R9 is grounded, and the capacitor C11 is connected in parallel with the resistor R9; a node C is formed at the joint of the visible light photodiode PH1 and the resistor R9 and is connected to the main control unit; the infrared detection unit comprises an infrared light sensing diode PH2, a resistor R10 and a capacitor C12, the infrared light sensing diode PH2 and the resistor R10 are connected in series, one end of the infrared light sensing diode PH2 is used for being connected with a first voltage signal, one end of the resistor R10 is grounded, and the capacitor C12 is connected with the resistor R10 in parallel; the junction of the infrared photodiode PH2 and the resistor R10 forms a node D, and the node D is connected to the main control unit.

Preferably, the brightness control dimmer further comprises a voltage stabilizing unit connected with the main control unit, and the voltage stabilizing unit is used for being connected with the LED lighting device to supply power to the main control unit.

Preferably, the user control signal includes a set light intensity signal carrying set light intensity, the main control unit includes a divider, a multiplier and a comparison operator, when the output brightness of the LED lighting device is zero, the visible light intensity signal and the infrared light intensity signal obtain a calibration factor through the divider, when the brightness control dimmer works, the infrared light intensity and the calibration factor obtain the ambient natural light intensity through the multiplier, and the comparator compares the ambient natural light intensity with the set light intensity to determine whether the lighting brightness of the LED lighting unit needs to be adjusted.

The invention also provides an LED lighting system, which comprises the brightness control dimmer and an LED lighting device, wherein the LED lighting device is connected with the brightness control dimmer, the LED lighting device comprises an LED driving unit and an LED lighting unit, the LED driving unit is connected with the LED lighting unit, and the brightness control dimmer is used for dimming the LED lighting device.

Preferably, the LED lighting unit comprises an LED installation part, a plurality of LEDs are arranged on the installation part, and the light detection unit is arranged on one side, far away from the LED light emitting direction, of the LED installation part.

Preferably, the LED lighting unit includes a mounting portion, the mounting portion is provided with a plurality of LEDs and a light shielding ring protruding relative to the mounting portion, and the light detection unit is mounted in the light shielding ring.

Preferably, the LED installation part is a spherical structure, and the sphere is protruding towards LED light-emitting direction, LED centers on the light detection unit sets up.

Compared with the prior art, the brightness control dimmer is used for detecting the infrared ray through setting up the infrared light detecting element that the infrared ray produced the infrared light intensity signal, can effectively obtain accurate environment natural light intensity to promote LED lighting device's the degree of accuracy of adjusting luminance.

The dimming control unit converts the PWM signal transmitted by the main control unit into an analog signal through the filter circuit, and generates a 0-10V analog dimming signal after the PWM signal is amplified by the amplifying chip U4 and the triode Q1, so that the signal processing is effectively simplified, the circuit is simple, and the cost is low.

The voltage stabilizing unit supplies power to the brightness control dimmer through the LED lighting device, so that the brightness control dimmer does not need to be additionally provided with a power supply, the cost can be reduced, and the integration level of a product is improved.

When the output of the LED illuminating device is zero, the visible light intensity signal and the infrared light intensity signal obtain a calibration factor through a divider, when the LED illuminating device illuminates, the infrared light intensity and the calibration factor obtain the natural light intensity of the environment through a multiplier, and the comparator compares the natural light intensity of the environment with the set light intensity to determine whether the illumination brightness of the LED illuminating unit needs to be adjusted or not. The LED light can be effectively prevented from influencing the dimming accuracy. And the dimming error caused by the infrared intensity difference in different areas or time is reduced.

The setting of shading ring can effectively avoid LED light to be detected as the possibility of environment natural light, promotes the precision of adjusting luminance.

[ 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 diagram of a module structure of an LED lighting device according to a first embodiment of the present invention.

Fig. 3 is a schematic diagram of a module structure 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 an LED lighting device according to a first embodiment of the present invention.

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

Fig. 6 is a schematic diagram of a module structure of a brightness control dimmer of an LED lighting system according to a second embodiment of the present invention.

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

Fig. 8 is a circuit diagram of a main control unit of a brightness control dimmer of a second embodiment of the present invention.

Fig. 9 is a circuit diagram of a light detection unit of a brightness control dimmer 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 brightness control dimmer 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 brightness control dimmer 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 brightness control dimmer 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 clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the 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 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 brightness control dimmers (not shown) that can dim the LED lighting units 15 via the dimming reserved terminals a.

As a preferred embodiment, at least two dimming interfaces connecting different brightness control dimmers are included so that the LED lighting device 10 can be dimmed by the different brightness control dimmers, it being understood that dimming of the LED lighting device 10 by the different brightness control dimmers is performed simultaneously or not.

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 includes two dimming interfaces, which are a first dimming interface 1731 and a second dimming interface 1732, respectively. 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 brightness control dimmer 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 perform dimming. The brightness control dimmer 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.

Compared with the prior art, an LED lighting device's interface unit of adjusting luminance connect in adjust luminance reserve on the terminal, the interface unit of adjusting luminance includes two at least interfaces of adjusting luminance, two at least interfaces of adjusting luminance are used for connecting different brightness control dimmers, and the user can adjust luminance to LED lighting device through different brightness control dimmers. 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 luminance control dimmers, 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.

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 brightness control dimmer as disclosed in the first embodiment. The brightness control dimmer is connected to the dimming interface of the LED lighting device 10. In the present embodiment, the brightness control dimmer 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 smart controller 21 and the dimmer 23 may be any existing brightness control dimmer.

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 is 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. The utility model discloses in through setting up infrared ray detecting element 2133, infrared ray detecting element 2133 detects out the light intensity of the infrared ray light intensity in order to reverse the light intensity of current environment natural light among the current environment natural light. Specifically, when the output brightness of the LED lighting unit 15 is zero, the 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 brightness 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 includes chip U2 and burns record port J2, burns record port J2 and includes 5 pins, wherein the 1 st pin and the 5 th pin ground connection respectively and first voltage signal, the utility model discloses well first voltage signal value 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 series 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, and the 4 th pin and the 8 th pin are grounded and a second voltage signal respectively, the utility model discloses well second voltage signal takes +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 the first voltage corresponding to the first voltage signal, and the voltage regulation chip U1 of the present invention turns +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 dimming control unit converts the PWM signal transmitted by the main control unit into an analog signal through the filter circuit, and generates a dimming signal after the PWM signal is amplified by the amplifying chip U4 and the triode Q1, so that the signal processing is effectively simplified, the circuit is simple, and the cost is low.

When the output brightness of the LED lighting device is zero, the visible light intensity signal and the infrared light intensity signal obtain a calibration factor through a divider, when the LED lighting device lights, the infrared light intensity and the calibration factor obtain the ambient natural light intensity through a multiplier, and the comparator compares the ambient natural light intensity with the set light intensity to determine whether the lighting brightness of the LED lighting unit needs to be adjusted or not. The LED light can be effectively prevented from influencing the dimming accuracy. And the dimming error caused by the infrared intensity difference in different areas or time is reduced.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A brightness control dimmer for connection with an LED lighting device for dimming the LED lighting device, comprising: luminance control dimmer includes the main control unit, is used for receiving user control signal's control signal receiving element, the control unit and the light detection unit of adjusting luminance, control signal receiving element, the control unit and the light detection unit of adjusting luminance all are connected with the main control unit, the control unit of adjusting luminance be used for with LED lighting device connects in order to adjust luminance to it, the light detection unit includes visible light detection unit and infrared ray detection unit, and the visible light detection unit is used for detecting visible light in order to produce visible light intensity signal, and infrared ray detection unit is used for detecting the infrared ray and produces infrared ray intensity signal.

2. A brightness control dimmer as recited in claim 1, wherein: the main control unit comprises a control chip with the model number N76E 003.

3. A brightness control dimmer as recited in claim 1, wherein: the dimming control unit comprises an amplification chip U4, a filter circuit and a triode Q1, the filter circuit and the triode Q1 are connected with the amplification chip U4, the main control unit sends out a PWM signal, the PWM signal converts a digital signal into an analog signal through the filter circuit, and the analog signal is amplified through the amplification chip U4 and a triode Q1 to generate a dimming signal.

4. A brightness control dimmer as recited in claim 1, wherein: the visible light detection unit comprises a visible light photosensitive diode PH1, a resistor R9 and a capacitor C11, wherein the visible light photosensitive diode PH1 and the resistor R9 are connected in series, one end of the visible light photosensitive diode PH1 is used for being connected with a first voltage signal, one end of the resistor R9 is grounded, and the capacitor C11 is connected with the resistor R9 in parallel; a node C is formed at the joint of the visible light photodiode PH1 and the resistor R9 and is connected to the main control unit;

the infrared detection unit comprises an infrared light sensing diode PH2, a resistor R10 and a capacitor C12, the infrared light sensing diode PH2 and the resistor R10 are connected in series, one end of the infrared light sensing diode PH2 is used for being connected with a first voltage signal, one end of the resistor R10 is grounded, and the capacitor C12 is connected with the resistor R10 in parallel; the junction of the infrared photodiode PH2 and the resistor R10 forms a node D, and the node D is connected to the main control unit.

5. A brightness control dimmer as recited in claim 1, wherein: the brightness control dimmer further comprises a voltage stabilizing unit connected with the main control unit, and the voltage stabilizing unit is used for being connected with the LED lighting device to supply power to the main control unit.

6. A brightness control dimmer as recited in claim 1, wherein: the user control signal comprises a set light intensity signal carrying set light intensity, the main control unit comprises a divider, a multiplier and a comparison arithmetic unit, when the output brightness of the LED lighting device is zero, the visible light intensity signal and the infrared light intensity signal obtain a calibration factor through the divider, when the LED lighting device lights, the infrared light intensity and the calibration factor obtain the natural light intensity of the environment through the multiplier, and the comparator compares the natural light intensity of the environment with the set light intensity to determine whether the lighting brightness of the LED lighting unit needs to be adjusted or not.

7. An LED lighting system characterized by: comprising a brightness control dimmer as claimed in any one of claims 1 to 6 and an LED lighting device, the LED lighting device being connected to the brightness control dimmer, the LED lighting device comprising an LED drive unit and an LED lighting unit, the LED drive unit being connected to the LED lighting unit, the brightness control dimmer being adapted to dim the LED lighting device.

8. The LED illumination system of claim 7, wherein: the LED lighting unit comprises an LED installation part, a plurality of LEDs are arranged on the installation part, and the light detection unit is arranged on one side of the LED installation part, which is far away from the light emitting direction of the LEDs.

9. The LED illumination system of claim 7, wherein: the LED lighting unit comprises an installation part, a plurality of LEDs and a shading ring protruding relative to the installation part are arranged on the installation part, and the light detection unit is installed in the shading ring.

10. The LED illumination system of claim 9, wherein: the LED installation department is a spherical structure, and the sphere is protruding towards LED light-emitting direction, LED centers on the light detection unit sets up.