LED is a light emitting diode, which is a light emitting device made of a semiconductor homogeneous PN junction, a heterogeneous PN junction, a metal-semiconductor (MS) junction, and a metal-insulator-semiconductor (MIS) junction. Its working principle and some electrical characteristics are the same as general crystal diodes, but the crystal materials used are different. LEDs include different types of visible light, invisible light, and laser. Visible light LEDs are common in life. The color of light-emitting diodes depends on the materials used. There are a variety of colors, including yellow, green, red, orange, blue, purple, cyan, white, and full color, and can be made into various shapes such as rectangles and circles. LED has the advantages of long life, light weight, low power consumption (energy saving), low cost, etc., and low operating voltage, high luminous efficiency, extremely short luminous response time, wide operating temperature range, pure light color, and solid structure ( A series of characteristics, such as shock resistance and vibration resistance, and stable and reliable performance, are highly favored by people.
Because the luminous body of the LED is close to the "point" light source, the design of the lamp is more convenient, but when it is used for large area display, the current and power consumption are large. LEDs are generally used for display devices and optoelectronic coupling devices such as indicator lights, digital tubes, and display boards in electronic equipment. They are also commonly used in optical communications, as well as building outlines, amusement parks, billboards, streets, and stage decoration.

What is led point light source
Led point light source is a new type of energy-saving and environmentally friendly decorative light. It uses led cold light source to emit light, built-in microcomputer chip, can be programmed and controlled, multiple simultaneous changes. The full-color change effect and multiple LED point light sources form a dot matrix screen. A variety of drawings, text and animation effects can be changed, which is a supplement to linear light sources and flood lighting. The appearance is beautiful and can meet the design needs of decorative points and lines.

What are the characteristics of led point light source
1. It can be programmed to control multiple simultaneous changes, which can display diversified full-color change effects, and also can realize multiple dot light sources to form a dot matrix screen to change various effects;
2. Multiple changes: LED light sources can use the three primary color principles of red, green, and basket. Under the control of computer technology, the three colors have 256 gray levels and can be arbitrarily mixed to produce 256 × 256 × 256 = 16777216 colors. The combination of different light colors has many changes to achieve a variety of dynamic changes and various images.
3.Environmental protection: environmental protection is better, there is no ultraviolet and infrared in the spectrum, there is no heat or radiation, glare is small, and the waste is recyclable, there is no pollution without mercury elements, and the cold light source can be safely touched, which is typical Green lighting source.
4. High-tech tip: Compared with the monotonous luminous effect of traditional light sources, LED light sources are low-voltage microelectronic products. They have successfully integrated computer technology, network communication technology, image processing technology, embedded control technology, etc., so they are also digital information products. Semiconductor optoelectronic device "high-tech" technology has the characteristics of online programming, unlimited upgrades, flexibility
5, long life: LED light source is called it longevity lamp, which means that the lamp will never go out. Solid cold light source, epoxy resin package, there is no loose part in the lamp body, there are no shortcomings such as easy to burn filament, thermal deposition, light decay, etc. The service life can reach 60,000 to 100,000 hours, which is 10 times longer than the traditional light source the above.

Application
LED point light sources can be used not only for dot matrix display screens, but also for the outline of buildings such as houses and bridges in urban lighting projects. Interior decoration lighting projects for bars, hotels, hotels and other entertainment venues. At present, the market prospects are comparative. it is good.