The main structure of the rechargeable LED desk lamp is: high-brightness white light-emitting diode; 220 volt AC to low-voltage DC circuit (power supply); lampshade; lamp holder; power switch; power line; socket;
The functions of each component are as follows:
High-brightness white LED: A solid-state semiconductor device that converts electricity directly into light. The heart is a semiconductor wafer, one end of which is attached to a holder, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the entire wafer is encapsulated by epoxy resin. The semiconductor wafer consists of two parts, one part is a P-type semiconductor, in which the hole dominates, and the other end is an N-type semiconductor, which is mainly electrons here. But when the two semiconductors are connected, they form a "P-N junction." When a current is applied to the wafer through the wire, the electrons are pushed toward the P region. In the P region, the electrons recombine with the holes, and then the energy is emitted in the form of photons. This is the principle of LED illumination. The wavelength of the light determines the color of the light, which is determined by the formation of the P-N junction material.
220 volt AC to low voltage DC circuit (power supply): A power supply is a device that supplies power to an electronic device, also known as a power supply, that provides the power required by all components in the computer. The size of the power supply, whether the current and voltage are stable, will directly affect the working performance and service life of the equipment.
Lampshade: The lampshade not only covers the lamp to make the light gather together, but also prevents electric shock and also protects the eyes. Therefore, there will be a lampshade on each lamp.
Light stand: Provides supporting force, and carries the lampshade and diode on the lamp. At the same time, it can be distorted, adjust the angle of the light source to meet the requirements of different people, and secondly it is also the conveying pipe of the wire.
Power switch: The function of turning on the power, so that the lamp system can work normally by passing current.
Power cord: delivers current to the inside of the desk lamp, so that the desk lamp is in working condition.
Socket: The power socket refers to the device used to connect the AC power provided by the utility power to make the home appliance and the portable small device energized. The power outlet is a female connector with a slot or recess for inserting a power plug with a rod or copper plate projection to conduct power through the plug to the appliance. Generally, the sockets are designed to be plugs of different specifications and cannot be inserted. Some of the sockets have a stick-like protrusion and a recess on the plug.
Battery: A battery is one of the batteries. Its function is to store limited electric energy and use it in a suitable place. It works by converting chemical energy into electrical energy.