What is LED point light source
2022-07-20 17:42
LED point light source is a new type of decorative light, which is a supplement to linear light source and flood lighting. Through pixel point color mixing, the pixel point spacing of intelligent lamps and lanterns that can replace a certain specification display screen by point and surface effect is achieved: the distance from the center of one pixel point to the center of another pixel point, which is what we now call "P", Such as P3, P6, ...; the point distance reflects the pixel density from the distance between two pixels, the point distance and pixel density are the physical characteristics of the flash screen; the information capacity is the one-time pixel density per unit area. A quantitative unit of the information-carrying capacity that is displayed. The smaller the point distance, the higher the pixel density, the more information capacity that can be flashed per unit area at one time, and the closer the suitable viewing distance is. The larger the point distance, the lower the pixel density, the less information capacity that can be flashed at one time per unit area, and the longer the suitable viewing distance.
LED is a light-emitting diode, which is a light-emitting device made of semiconductor homo-PN junction, hetero-PN junction, metal-semiconductor (MS) junction, and metal-insulator-semiconductor (MIS) junction. Its working principle and some electrical characteristics are the same as general crystal diodes, however, the crystal materials used are different. LEDs include different types of visible light, invisible light, lasers, etc. Visible light LEDs are common in life. The color of light-emitting diodes depends on the materials used. At present, there are yellow, green, red, orange, blue, purple, cyan, white, full color and other colors, which can be made into various shapes such as rectangles and circles. LED has the advantages of long life, small size and light weight, low power consumption (energy saving), low cost, low operating voltage, high luminous efficiency, extremely short luminous response time, wide operating temperature range, pure light color, and firm structure ( Impact resistance, vibration resistance), stable and reliable performance and a series of characteristics, much favored by people.
Since the illuminant of the LED is close to the "point" light source, the design of the lamp is more convenient, but if it is displayed as a large area, the current and power consumption are large. LEDs are generally used for display devices and optocoupler devices such as indicator lights, digital tubes, and display panels of electronic equipment. They are also commonly used in optical communication, etc., as well as the decoration of building outlines, amusement parks, billboards, streets, and stages.
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