什么是LED點光源
The LED point light source is a new type of decorative lamp, which is a supplement to linear light source and floodlight. Intelligent lamps and lanterns capable of replacing a certain specification screen by the color mixing of pixels to achieve the effect of the point and the surface.
Pixel pitch: a pixel center to another pixel center distance, what we now call the "P", such as P3, P6,... Is the distance from the point of the distance between 22 pixels to reflect the pixel density, distance and pixel density is the physical characteristics of flash screen; information capacity is the amount of one-time flash unit pixel density per unit area of the bearing capacity of the. The smaller the point distance, the higher the pixel density, the unit area can blink, the more information capacity, the closer the appropriate distance to watch. The greater the point distance, the lower the pixel density, the unit area can blink, the less information capacity, the more appropriate to watch the distance.
LED is a light-emitting diode, which is made up of semiconductor pn junction, heterojunction PN junction, metal semiconductor (MS) junction and metal insulator semiconductor (MIS) junction. The operating principle and some electrical characteristics are the same as those of general crystal diodes, but the crystal materials used are different. LED includes visible light, invisible light, laser, and so forth. LED is the most common light in life. Light color light emitting diode depends on the materials used, there are yellow, green, red, orange, blue, purple, blue, white, color and other colors, can be made into rectangular and circular shapes. LED has the advantages of long service life, small volume and light weight, low power consumption (energy), low cost, and low working voltage, high luminous efficiency, light response time is very short, wide working temperature range, pure light color, firm structure (impact resistance, vibration), stable and reliable performance and a series of characteristics, by people favor.
As the light of LED is close to "point" light source, the design of lamp is more convenient, but the current and power consumption are larger as large area display. LED can be used as an indicator lamp, electronic equipment, digital tube display panel, display device and photoelectric coupling device is also commonly used in optical communication, and the outline of a building, amusement park, billboards, street and other places, stage decoration.
