Lamp bead, driver, shell, size, luminous flux, illuminance of several meters, rated power, actual power, power factor, color rendering index, color temperature, working environment temperature and light attenuation.
Main parameters of led lamp beads:
Low-power lamp beads: red and yellow:1.8-2.4v. blue, green and white: 3-3.6v. Rated current is 20 mA.
High power lamp bead: 1W: 3-3.6V, 350mA.
Institutional functions:
The main structure of rechargeable LED desk lamp is: high brightness white LED; 220v AC to low-voltage DC circuit (power supply); Lampshade; Lamp holder; Power switch; Power cord; Socket; Batteries.
The functions of each component are as follows:
High brightness white light emitting diode (LED) is a solid-state semiconductor device, which can directly convert electricity into light. Our heart is a semiconductor chip. One end of the chip is attached to the bracket, one end is the negative electrode, and the other end is connected to the positive electrode of the power supply, so that the whole chip is encapsulated by epoxy resin. The semiconductor wafer consists of two parts, one is a P-type semiconductor, in which holes are dominant, and the other is an N-type semiconductor, mainly electrons. But when these two semiconductors are connected together, a "pn junction" is formed between them. When the current acts on the chip through the wire, the electrons will be pushed to the P region, where they will recombine with holes and then release energy in the form of photons, which is the principle of LED light emission. The wavelength of light determines the color of light, and the color of light is determined by the material that constitutes the pn junction.
220-volt AC to low-voltage DC circuit (power supply): Power supply is a device that provides power for electronic equipment, also known as power supply, which provides all components in the computer with the required power. Whether the power, current and voltage of the power supply are stable will directly affect the working performance and service life of the equipment.
Lampshade: Lampshade is not only used to cover lamps and gather light together, but also to prevent electric shock and protect eyes, so every lamp will have a lampshade.
Lamp holder: provides support, carries the lampshade and diode on the desk lamp, and can twist and adjust the angle of light source to meet the requirements of different people. Secondly, it is also the transmission pipeline of electric wires.
Power switch: the function of turning on the power supply, which makes the desk lamp system work normally through the current.
Power cord: it transmits current to the interior of the desk lamp, so that the desk lamp is in working condition.
7. Socket: Power socket refers to the device used to connect the alternating current provided by the commercial power to electrify household appliances and portable small equipment. A power socket is a female connector with a slot or a concave hole for inserting a power plug with a rod-shaped or copper-plate-shaped protrusion.
The head is inserted to conduct power to the appliance through the plug. Generally, the design of sockets is that plugs of different specifications cannot be inserted, and some sockets will have rod-shaped protrusions to match the concave holes on the plugs.
8. Battery: A battery is a kind of battery. Its function is to store limited electric energy and use it in the right place. Its working principle is to convert chemical energy into electrical energy.