In recent years, the LED lighting project has received strong support from the government. The municipal governments have attached great importance to the city's lighting profession, and have carried out urban lighting construction to varying degrees. The construction of urban lighting projects is an important measure to improve and beautify the urban environment. . What is the LED lighting project? Which products do you need to do LED lighting project? Below, I will give you a brief introduction to the basic knowledge of LED lighting engineering. Before introducing the basics of LED lighting engineering, let's repeat the LED lighting principle. Four types of lighting sources LED (Light Emitting Diode), a solid-state semiconductor device that converts electricity directly into light. The heart of the LED is a semiconductor wafer with an LED on one end of the chip, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the entire wafer is encapsulated by epoxy resin. The semiconductor wafer consists of two parts, one part is a P-type semiconductor, in which the hole dominates, and the other end is an N-type semiconductor, which is mainly electrons here. But when the two semiconductors are connected, they form a "PN junction" between them. When a current is applied to the wafer through the wire, the electrons are pushed toward the P region. In the P region, electrons recombine with the holes, and then the energy is emitted in the form of photons. This is the principle of LED illumination. The wavelength of light, which is the color of light, is determined by the material that forms the PN junction. ◠What is the LED lighting project? LED lighting project refers to energy-saving and emission-reducing efficient projects that use the latest LED lighting technology to reduce energy consumption, reduce exhaust emissions, and improve urban lighting brightness. What is LED digital tube ◠Understand LED lighting engineering products - LED digital tube There are many types of LED products, and the following products are generally needed for lighting projects. 1.LED digital tube LED digital tube Also known as LED guardrail tube, LED guardrail light, LED outline light; this product is often used to do the building outline installation, KTV door or advertising signs, as well as highway and bridge guardrail lighting projects; can achieve colorful water, chase, scan and other effects If you make LED digital tube screen (LED digital signboard), you can make a variety of dazzling animations and patterns, you can also play video; text and graphics. LED digital tube classification According to the effect, it can be divided into: monochrome constant color (red, yellow, blue, green, white); colorful can be divided into: single-segment colorful gradient jump; true six-segment, true eight-segment, 12-segment, 16-segment, 32 paragraphs, 48 ​​paragraphs, etc. According to the control method, it is divided into: internal control and external control. Internal control: The internal control LED guardrail tube is to write the required program directly into the working IC chip of the LED guardrail tube. After the power is turned on, the pattern can be directly ran out; the external control is simply an external controller; the controller It is divided into offline system and online system; online system refers to the control system that works on the computer (used for LED digital tube screen); offline system does not need to be attached to the computer, can input control signal drive after power connection LED guardrail tube. LED digital tube installation The external control LED guardrail tube can clearly understand the signal direction. Generally, the signal is input from the male head, and the female head is the signal output. Then, according to the signal direction diagram provided by the manufacturer, if it is wrongly installed, it must be folded down and reloaded. It also costs money. The other is the power supply installation: If it is a DC (DC) LED digital tube must pay attention to it, under normal circumstances: the two-pin small plug is the power supply, red is the positive pole, the blue line is the negative pole; must be checked after installation The circuit, confirm OK, and then power on; otherwise it will cause the LED digital tube to burn out, seriously affecting the project acceptance. What is LED rainbow tube ◠Understand LED lighting engineering products - LED rainbow tube 2.LED rainbow tube LED rainbow tube Also known as LED light strip, LED beautiful light; is one of the most commonly used products in the lighting project, and the price is relatively cheap, is the LED lighting products that many customers love. It is mainly suitable for places where the cost is not high, and the required effect does not need to be too dazzling; it can be used as a building or signboard outline; iron or word styling; ceiling or KTV slat decoration. LED rainbow tube classification Round two lines, round three lines, flat two lines, square two lines, flat three lines, flat four lines, flat five lines, flat seven lines, etc.; red, yellow, blue, green, white, red + blue, red green blue, red yellow blue , red, yellow, blue, green, etc.; generally the jump mode can achieve the flashing effect through the controller. LED rainbow tube installation LED rainbow tube includes LED light strip, LED flexible neon light, etc. When installing, try not to remove the light strip from the reel, and then pull it all the way to the building; because if the force is too strong, it will lead to the light strip. The main line breaks, causing irreparable damage to the lamp strip; if there is no light in the middle, the non-bright unit can be cut with a blade and then docked with the intermediate joint. It should be reminded that the plugs and the tail plugs of the dockings should be waterproofed when used outdoors. In addition, when using the electric wire, pay attention to the negative power; when the power consumption of the project is not large, the main line uses the national standard 4 mm square main line, and the transformer to the lamp line uses 2.5 mm square wire. Use up to five types of network cables as much as possible for the signal lines. Transformers and controllers are waterproof and rainproof. What is LED decorative light ◠Understand LED lighting engineering products - LED decorative light series 3.LED decorative light series LED star light There are LED star lights (LED string), LED net lights, LED waterfall lights, LED stars. These LED decorative lights are generally used in flower or small landscape lighting. For example, to make a tree lighting effect, you can use a series of LED star lights, LED star lights around the branches, and then flash through the controller, it will become a flashing colorful LED Christmas tree lights. There are many kinds of LED products, such as LED point light source, LED neon light, LED display, LED flood light, LED high power wall washer, LED underground light, LED underwater light, LED landscape tree and LED plastic word. In addition, floodlights such as metal halide lamps and sodium lamps are often used. 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