Technical principle of LED solar lawn lamp

The design method of solar lawn light source and power system has developed rapidly in recent years due to the unique advantages of solar lawn light. The lawn lamp has low power and is mainly used for decoration purposes. It has high requirements for mobility, difficult circuit laying, and high waterproof requirements. These make lawn lights powered by solar cells show many unprecedented advantages.

1. Definition of LED solar lawn light

Solar lawn lights mainly use the energy of solar cells to work. When the sun shines on the solar cells during the day, the light energy is converted into electrical energy and stored in the battery, and then the battery is used for the LED (Light Emitting Diode) of the lawn lamp at night. ) to provide power. Its advantages are mainly safety, energy saving, convenience, environmental protection and so on. It is suitable for green grass beautification lighting decoration in residential communities, and park lawn beautification decoration.

2. The structure of LED solar lawn light

It consists of solar cell components (photoelectric panels), super bright Led Lights (light source), maintenance-free rechargeable batteries, automatic control circuits, lamps, etc.

3. System composition of LED solar lawn light

The solar lawn light booster IC can automatically switch between charging and discharging behavior. When the solar charging panel senses sunlight during the day, it will automatically switch to turn off the light and enter the charging state. When the night falls, the solar charging panel will not sense sunlight. To enter the battery discharge state to turn on the light. The solar lawn light boost IC can boost the output voltage of a 1.5 volt rechargeable battery to 3.6 volts.

A set of circuit board IC should be equipped with a No. 5 rechargeable battery to drive 1-7 LED Light-emitting diodes; multiple sets of circuit board ICs and so on; the integrated circuit of the solar lawn light controller and some peripheral components, the main functions Including charging circuit, driving circuit, photosensitive control circuit and pulse width modulation circuit, etc. The controller has high conversion efficiency: 80~85% (typical value), which can reduce the power requirements of solar cell plates; low start-up voltage: 0.9V (maximum value); adjustable output current and other characteristics.

4. The light source advantages of LED solar lawn lights

At present, most lawn lamps use LED as the light source. The LED has a long lifespan, which can reach more than 100,000 hours, and has a low operating voltage, which is very suitable for use in solar lawn lamps. In particular, LED technology has experienced its key breakthrough, and its characteristics have greatly improved in the past 5 years, and its performance-to-price ratio has also greatly improved.

In addition, the LED is powered by low-voltage DC, and its light source control cost is low, making it possible to adjust the light and shade and frequent switching, and it will not adversely affect the performance of the LED. It can also easily control the color, change the distribution of light, and create a dynamic illusion, so it is especially suitable for solar lawn lights.