CN201426200Y - Controller and brightness-adjustable solar lamp including the controller - Google Patents

Abstract

The utility model relates to a controller, which is applied to the control of a solar lamp with an LED light source, comprising a switch module for controlling the opening and closing of the LED light source, and a brightness adjustment module connected with the switch module for Adjust the brightness of the LED light source. After the controller of the utility model is applied to solar lamps, it can adjust the illumination brightness of solar lamps. When high-brightness lighting is not needed, the brightness of solar lamps can be reduced according to needs, that is, the power consumption of light sources can be reduced, thereby saving energy stored in The electric energy in the battery enables the solar lamp to prolong the lighting time or reduce the power of the solar battery and the capacity of the battery to reduce the production cost of the solar lamp.

Description

Controller and brightness-adjustable solar lamp including the controller

technical field

The utility model relates to a controller and a solar lamp including the controller, in particular to a controller and a solar lamp including the controller with adjustable brightness.

Background technique

Countries around the world are increasingly interested in renewable energy including solar energy, and solar photovoltaic systems can inject new vitality into the world's energy industry. Countries have turned their attention to this new energy field and increased investment in research and development of solar power technology and products. Solar energy utilization will become one of the most popular industries in this century. At the same time, with the rapid development of LED technology, LED lighting has been well applied in the field of solar lighting and has become the most ideal light source for solar lighting.

Existing solar lamp controllers can control the turning on and off of the light source of the solar lamp, but cannot adjust the brightness of the LED as the light source according to a predetermined program. The disadvantage of this method is that the brightness of the light source cannot be changed according to actual needs. When high-brightness lighting is not needed, the electric energy stored in the battery cannot be saved, that is, the lighting time is shortened or the power of the solar battery and the battery capacity are increased. Increase the production cost of solar lamps and lanterns.

Utility model content

The utility model aims at the problem that the existing solar lamps cannot change the brightness of the light source according to the actual needs, and cannot save the electric energy stored in the storage battery, thereby increasing the production cost of the solar lamps, and provides a controller and a controller whose brightness can be adjusted. Adjustable lamps.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: a controller, which is applied to the control of solar lamps containing LED light sources, includes a switch module and a brightness adjustment module, the switch module is connected to the brightness adjustment module, and the switch The module is used to control the turning on and off of the LED light source, and the brightness adjustment module is used to adjust the brightness of the LED light source.

The beneficial effects of the utility model are: the controller of the utility model can adjust the lighting brightness of the solar lighting fixture after being applied to the solar lighting fixture, and can reduce the brightness of the solar lighting fixture when high-brightness lighting is not needed, that is, reduce the power of the light source. consumption, thereby saving the electric energy stored in the battery, so that the solar lamps can extend the lighting time or reduce the power of the solar battery and the capacity of the battery to reduce the production cost of the solar lamps.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the brightness adjustment module is composed of a driving signal generating unit and an LED driver connected to the driving signal generating unit, wherein:

The driving signal generation unit is used to output variable voltage signals to the LED driver;

The LED driver is configured to output a constant current whose current value is proportional to the voltage value of the variable voltage signal to the LED light source under the control of the variable voltage signal.

The beneficial effect of adopting the above further solution is that when the driving signal generating unit outputs a larger voltage signal, the LED driver will output a larger current, and the brightness of the LED light source will be larger, and vice versa.

Further, the brightness adjustment module is composed of a driving signal generating unit and an LED driver connected to the driving signal generating unit, wherein:

The driving signal generation unit is used to output variable voltage signals to the LED driver;

The LED driver is configured to output a constant current whose current value is inversely proportional to the voltage value of the variable voltage signal to the LED light source under the control of the variable voltage signal.

The beneficial effect of adopting the above further solution is that when the driving signal generating unit outputs a larger voltage signal, the LED driver will output a smaller current, and the brightness of the LED light source will be smaller, and vice versa.

Further, the driving signal generating unit includes a microprocessor MCU, an integral circuit composed of a resistor R1 and a capacitor C2, and an operational amplifier IC2, one end of the resistor R1 is connected to the pulse width modulation PWM output end of the microprocessor MCU, and the other end is connected to To one end of the capacitor C2, the other end of the capacitor C2 is grounded, the non-inverting input terminal of the operational amplifier IC2 is connected to the junction point of the resistor R1 and the capacitor C2, the inverting input terminal is connected to the output terminal, and the output terminal of the operational amplifier IC2 is the drive The output terminal of the signal generation unit.

The beneficial effect of adopting the above further solution is that the brightness of the LED light source can be adjusted through the voltage signal output by the driving signal generating unit.

Further, the LED driver is a DC/DC converter working in the mode of pulse width modulation (PWM).

The utility model also provides a solar lamp with adjustable brightness, which includes an LED light source, a solar battery, a storage battery and the controller, the solar battery is connected to the storage battery, the solar battery charges the storage battery, and the storage battery is the controller and light source power supply.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the solar lamp with adjustable brightness of the present invention;

Fig. 2 is a detailed schematic diagram of the structure of the brightness-adjustable solar lamp of the present invention.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

Fig. 1 is a schematic structural diagram of a solar lamp with adjustable brightness of the present invention. As shown in FIG. 1 , the solar lamp includes a controller 10 , an LED light source 20 , a storage battery 30 and a solar cell 40 . The controller 10 includes a brightness adjustment module 101 and a switch module 102 , and the switch module 102 is connected to the brightness adjustment module 101 . The brightness adjustment module 101 is used to adjust the brightness of the LED light source 20. The brightness adjustment module adjusts the brightness of the LED light source in a continuous adjustment mode, that is, the brightness and power consumption of the LED light source can be adjusted between 0% and 10%. Continuously adjustable within 100% range. The brightness adjustment module 101 includes a driving signal generating unit 1011 and an LED driver 1012, the driving signal generating unit 1011 is used to output a variable voltage signal to the LED driver 1012, and the LED driver 1012 is used to Under the control of the variable voltage signal, a constant current whose current value is proportional or inversely proportional to the voltage value of the variable voltage signal is output to the LED light source 20 . The driving signal generating unit 1011 also includes a timer, which can automatically adjust the voltage value of the variable voltage signal according to different time periods, and increase the brightness of the LED light source when necessary, such as when there are many black people and many vehicles in the first half of the night. , such as 100% brightness, to provide good lighting, and other time periods, such as when there are few people and vehicles in the middle of the night, reduce the brightness of the LED light source, such as 33% brightness, which can save the power consumption of the battery. The driving signal generating unit 1011 also includes a computing unit, which can automatically adjust the voltage value of the variable voltage signal according to the amount of electricity stored in the storage battery of the solar lamp, so that the voltage value of the variable voltage signal is consistent with the The power value stored in the battery is proportional to the power value. When the power in the battery is sufficient, the LED light source can be automatically adjusted to emit high brightness. When the power is insufficient, the brightness can be automatically reduced to save the power in the battery.

Fig. 2 is a detailed schematic diagram of the structure of the brightness-adjustable solar lamp of the present invention. As shown in Figure 2, the driving signal generating unit 1011 includes a microprocessor MCU, an integral circuit composed of a resistor R1 and a capacitor C2, and an operational amplifier IC2, and one end of the resistor R1 is connected to the pulse width modulation PWM output of the microprocessor MCU The other end is connected to one end of the capacitor C2, the other end of the capacitor C2 is grounded, the non-inverting input of the operational amplifier IC2 is connected to the junction of the resistor R1 and the capacitor C2, the inverting input is connected to the output, and the output of the operational amplifier IC2 The terminal is the output terminal of the driving signal generating unit. In this embodiment, the resistance value of the resistor R1 is 10Kohm, the capacity of the capacitor C2 is 104uF, and the model of the operational amplifier IC2 is LM358.

The LED driver 1012 includes a controller IC1, an inductor L1, a diode D1, a capacitor C3, a resistor R2, a resistor R3, a resistor R4 and a capacitor C1. In this embodiment, the controller IC1 is UC3842, the resistance value of the resistor R2 is 5Kohm, the resistance value of the resistor R3 is 150Kohm, the resistance value of the resistor R4 is 1ohm, the capacity of the capacitor C1 is 103uF, and the capacity of the capacitor C3 is 200uF. The inductive reactance of L1 is 10mH, the model of the diode D1 is IN5821, and the switch module 102 is a triode, the model of which is IRFZ48. When the pin 5 of the controller IC1 is 1, the switch module 102 is turned on, the current flows through the inductor L1 and stores energy until the voltage drop of the inductor current on R4 is equal to the threshold voltage set by the comparator, IC1 is reset, that is, 5 pin is 0. At this time, the switch module 102 is turned off, and the energy stored in the inductor L1 is supplied to the load through the Schottky diode D1 and charges C3 at the same time. When the load voltage is about to drop, the capacitor C3 is discharged, and the output terminal can obtain a stable voltage at this time. This voltage can drive LED light sources 20 such as D2 and D3.

IC1 contains a complete PWM controller, and the PWM pulse width of IC1 is controlled by the voltage of pin 2. When the PWM pulse width changes, the duty ratio of the output of pin 5 also changes at any time, and the current flowing through the LED light source 20 is adjusted by changing the energy storage and discharge time of the inductor L1 through the switch module 102 .

Utilize the PWM output function of microprocessor MCU and R1, C2, IC2 constitute a D/A converter. R1 and C2 form an integrating circuit, and IC2 is an operational amplifier for impedance matching. When the duty cycle of the PWM output pulse of the microprocessor MCU changes, the operational amplifier IC2 will output a corresponding variable voltage. That is, when the duty cycle of the PWM output pulse of the microprocessor MCU becomes lower, the output voltage of the operational amplifier IC2 decreases proportionally. Otherwise, it will increase. In this embodiment, the controller IC1 can also be ES3589, and the LED driver can output a constant current whose current value is inversely proportional to the voltage value of the variable voltage signal to the LED driver under the control of the variable voltage signal. LED light source.

The variable voltage output by the operational amplifier IC2 directly controls the voltage of pin 2 of IC1, that is, controls the PWM pulse width of IC1. Through the above analysis of the principle, it can be seen that the current flowing through the LED light source 20 is controlled by the microprocessor MCU. The microprocessor MCU can change the current of the LED light source 20 according to a program, that is, change the brightness of the LED light source 20 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. A controller, applied to the control of solar lamps containing LED light sources, comprising a switch module for controlling the opening and closing of the LED light source, characterized in that it also includes a brightness adjustment module for adjusting the For the brightness of the LED light source, the switch module is connected with the brightness adjustment module. 2. The controller according to claim 1, wherein the brightness adjustment module is composed of a driving signal generating unit and an LED driver connected to the driving signal generating unit, wherein: The driving signal generation unit is used to output variable voltage signals to the LED driver; The LED driver is configured to output a constant current whose current value is proportional to the voltage value of the variable voltage signal to the LED light source under the control of the variable voltage signal. 3. The controller according to claim 1, wherein the brightness adjustment module is composed of a driving signal generating unit and an LED driver connected to the driving signal generating unit, wherein: The driving signal generation unit is used to output variable voltage signals to the LED driver; The LED driver is configured to output a constant current whose current value is inversely proportional to the voltage value of the variable voltage signal to the LED light source under the control of the variable voltage signal. 4. The controller according to claim 2 or 3, wherein the driving signal generation unit comprises a microprocessor MCU, an integral circuit composed of a resistor R1 and a capacitor C2, and an operational amplifier IC2, and one end of the resistor R1 is connected to To the pulse width modulation PWM output terminal of the microprocessor MCU, the other end is connected to one end of the capacitor C2, the other end of the capacitor C2 is grounded, the non-inverting input terminal of the operational amplifier IC2 is connected to the junction of the resistor R1 and the capacitor C2, and the inverting input The terminal is connected to the output terminal, and the output terminal of the operational amplifier IC2 is the output terminal of the driving signal generating unit. 5. The controller according to claim 2 or 3, characterized in that the LED driver is a DC/DC converter working in a pulse width modulation (PWM) mode. 6. A solar lamp with adjustable brightness, comprising an LED light source, a solar battery, a storage battery and the controller according to any one of claims 1 to 8, the solar battery is connected to the storage battery, and the solar battery charges the storage battery , the battery supplies power for the controller and the light source.

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