What raw materials are used for LED lamp heads

The abbreviation of the English word LED, the main meaning: LED = light emitting diode, light-emitting diode, is a solid-state semiconductor device that can convert electrical energy into visible light, it can directly convert electricity into light; LED = large electronic display; LED = Lupus erythematosus disseminatus, disseminated lupus erythematosus, a chronic, idiopathic autoimmune disease; LED is the past tense and past participle of lead, which means "lead, lead"; IATA** at Pulkovo Airport, Russia. This entry focuses on light-emitting diodes.

LED (Light Emitting Diode) is a solid-state semiconductor device that can directly convert electrical energy into light energy. The heart of an LED is a semiconductor wafer to which one end of the wafer is attached.

LED light strain.

On one bracket, which is the negative electrode, and the other end is connected to the positive electrode of the power supply, and the entire wafer is encapsulated with epoxy resin. A semiconductor wafer is made up of two parts, one is a p-type semiconductor, in which holes dominate, and the other end is an n-type semiconductor, which is mainly electrons here. But when these two semiconductors are connected, a "p-n junction" is formed between them.

When an electric current is applied to the wafer through the wire, the electrons will be pushed to the p-region, where the electrons will recombine with the holes, and then the energy will be emitted in the form of photons, which is the principle of LED luminescence. The wavelength of the light determines the color of the light and is determined by the material that forms the p-n junction.

The LED street lamp head is composed of aluminum substrate heat dissipation aluminum of the lamp shell DC power supply, and the most common and mature product is the street lamp composed of 1W LED lamp beads, which is also the best and most mature product on the market.

Generally iron and copper, which can be tested with magnets. The outside is nickel-plated, and the copper one can be rust-proof.

LED lampshades can be divided into PC lampshades, glass lampshades, plastic lampshades, LED lampshades, DIY lampshades, paper lampshades, etc.

The decoration effect brought by the different materials of the lampshade is different:

The cloth lampshade gives a simple and elegant impression, the paper lampshade can create a hazy and dreamy atmosphere, the metal lampshade has a cold temperament and modern feeling, and the drum-shaped lampshade brings people nostalgic feelings.

In the bedroom, we can choose silk lampshades, especially hand-sewn and hand-painted lampshades, which can bring softness and add intimacy to the room; In the living room, you can choose a lampshade made of linen or parchment.

1) fragility of glass lampshades;

2) The light transmittance of transparent PC and frosted lampshade is low (only 80-89%) and the defects of point light sources can be seen;

3) The light transmittance of transparent PC with ribs or acrylic toner is low (only 80-89%) and the defects of point light sources can be seen;

The U.S. Department of Energy released the final version of the Energy Star standard for coarse LED light source lamps and the U.S. UL certification, safety is a very strict requirement; So.

The LED lamp shade is glass, which is easy to break and cause electric shock if it is accidentally dropped, and the safety cannot be guaranteed, so the certification is in progress.

It doesn't work. The problem of light efficiency is also very strict, so it is inevitable to choose a lampshade with high light transmittance, and it must be prevented by Zheng Zhen.

Glare is a problem, so not being able to see a point light source (i.e. a spot) is a very critical requirement.

Features of Qualified LED Fixture Lamp Shades:

1) High light transmittance, high diffusion, no glare, no light and shadow;

2) Suitable for the use of LED lamps;

3) Realize the transformation of point light source luminescence into spherical luminescence.

4) Excellent concealment of the light source (effectively adjust the diffusivity and transmittance, and the light transmittance reaches the maximum under the premise that the lamp beads cannot be seen);

5) Light transmittance reaches 94%;

6) Gu Tongchang has high flame retardancy;

7) It has high impact strength;

Whether the use of LED lamps and lanterns is qualified is not as simple as a few strokes, it is related to the safety of electricity in people's daily life.

Safety hazards. The use of LED lamp shades with qualified standards is a spontaneous means for us to protect our own safety.

Ordinary diodes are made of silicon, germanium, doped with phosphorus, boron, and LEDs have different materials according to the luminous color, such as gallium phosphide, gallium arsenide, etc., which are all semiconductors.

The following are the inorganic semiconductor materials used in conventional light-emitting diodes and the colors they emit light.

It depends on what kind of LED you are, basically the LEDs are packaged with transparent silicone, which is roughly like this.