Led rechargeable light bulbs are also known as led storage lights, led emergency lights, led uninterrupted lights, led lights that never go out when power outages. It has the advantages of easy installation or replacement; the led charging bulb includes: bulb head, shell, battery, light source, lampshade and electronic control board; the accommodation space formed by connecting the bulb head to the outer casing and then connecting the lampshade, which accommodates the electronic control board , a battery and a light-emitting source, and are connected to each other by wires; the electronic control board can convert the AC power into a DC power supply and provide it to the light-emitting source, and the electronic control board can detect whether the AC power is truly powered off, and select Whether to switch the power supply to battery power.
An electronic control board, the electronic control board includes a power supply circuit, a charging circuit, a power failure detection circuit and a power source switching circuit, the AC power is input to the power supply circuit, and the power supply circuit converts the alternating current into direct current to provide the charging circuit , Power switching circuit and power failure detection circuit. The AC power supply also has another input to the power failure detection circuit to detect whether the AC power supply has reached a real power failure. The charging circuit charges the rechargeable battery, which is the power switching circuit. One of the power switch circuits provides power, and the other power source of the power switch circuit is the power circuit. When the power failure detection circuit does not output a signal to the power switch circuit, the power switch circuit directly outputs the direct current provided by the power circuit to the light-emitting source;
When the power failure detection circuit outputs a signal to the power switching circuit, the power switching circuit outputs the DC power from the rechargeable battery to the light-emitting source; the accommodating space formed by the bulb head is connected to the shell and then connected to the lampshade, which accommodates the electronic control board, The battery and the light source are connected to each other through wires;
When the led rechargeable light bulb is powered off or out of power, the light bulb can still be illuminated normally for more than three hours, giving full play to the function of emergency lighting for power outages
