Structure function of LED desk lamp

The main structure of LED desk lamp is: high-brightness white light-emitting diode; 220 volt AC to low-voltage DC circuit (power supply); lamp shade; lamp holder; power switch; power cord; socket; battery.
The functions of each component are as follows:

High-brightness white light-emitting diode: It is a solid-state semiconductor device that can directly convert electricity into light. The heart of the chip is a semiconductor chip, one end of the chip is attached to a bracket, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the entire chip is encapsulated by epoxy resin. The semiconductor wafer is composed of two parts, one part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor, which is mainly electrons. But when these two semiconductors are connected, a “P-N junction” is formed between them. When the current acts on the chip through the wire, the electrons will be pushed to the P area, where the electrons and holes recombine, and then emit energy in the form of photons. This is the principle of LED light emission. The wavelength of light determines the color of light, which is determined by the material forming the P-N junction.

220 volt AC to low voltage DC circuit (power supply): The power supply is a device that provides power to electronic equipment, also called a power supply, which provides the electrical energy required by all the components in the computer. The size of the power supply, whether the current and voltage are stable, will directly affect the performance and service life of the equipment.


Lampshade: The lampshade not only covers the lamp in order to gather the light together, but also prevents electric shock and protects the eyes. Therefore, each lamp will have a lampshade.

Lamp holder: Provides supporting force, bears the lampshade and diode on the table lamp, and can distort and adjust the angle of the light source to meet the requirements of different people. Secondly, it is also a conduit for wires.

Power switch: The function of turning on the power makes the lamp system pass current and work normally.

Power cord: to deliver current to the inside of the lamp to make the lamp in working condition.

Socket: The power socket refers to a device used to connect to the AC power provided by the mains, so that household appliances and small portable equipment can be used. The power socket is a female connector with a slot or cavity, which is used to allow a power plug with a stick or copper plate protrusion

Plug in to conduct electricity to the appliance through the plug. Generally, sockets are designed such that plugs of different specifications cannot be inserted. Some sockets have stick-like protrusions that match the recesses on the plug.

Battery: A battery is a kind of battery, its function is to store limited electrical energy and use it in a suitable place. Its working principle is to convert chemical energy into electrical energy.

Post time: Aug-25-2020