The main difference is that the principle is different, the characteristics are different, the application is different, as follows:
First, the principle is different
1. Laser light
The laser is equipped with a YAG solid-state laser, which uses a krypton lamp and Nd:YAG crystal rod to produce a laser beam, which is converted to form a visible green light. Then the computer controls the galvanometer to deflect at high speed, so as to form beautiful text or graphics.
2, LED lights
LED (Light Emitting Diode), light emitting diode, is a solid semiconductor device that can convert electrical energy into visible light, which can directly convert electricity into light. The heart of the LED is a semiconductor chip, one end of the chip is attached to a bracket, one end is a negative electrode, and the other end is connected to the positive electrode of the power supply, so that the entire chip is encapsulated by epoxy resin.
A semiconductor chip consists of two parts, one is a P-type semiconductor, in which holes dominate, and the other is an N-type semiconductor, on which are mainly electrons. But when the two semiconductors are connected, a P-N junction is formed between them. When the current is applied to the chip through the wire, the electrons are pushed to the P region, where the electrons are combined with the holes, and then the energy is emitted in the form of photons, which is the principle of LED light.
Second, different characteristics
1. Laser light
(1), the range is far, can reach several kilometers away.
(2), bright color, high brightness.
(3) Good directivity and small light dispersion.
(4), special control software, graphics and text conversion is convenient, easy to control.
2, LED lights
(1) Energy saving: the energy consumption of white LED is only 1\/10 of that of incandescent lamp, and 1\/4 of that of energy-saving lamp.
(2) Longevity: life span can reach more than 100,000 hours.
(3) can work in a high-speed state: if the energy-saving lamp is frequently started or turned off, the filament will be black and soon broken, so it is safer.
(4) Solid state package, belongs to the cold light source type. So it is easy to transport and install, can be installed in any micro and closed equipment, not afraid of vibration.
(5) Environmental protection, no harmful substances of mercury. The assembly parts of LED bulbs can be very easy to disassemble and assemble, and can be recycled by other people without manufacturer recycling.
(6) Significant energy saving. The use of ultra-bright high-power led light source, combined with high-efficiency power supply, than the traditional incandescent lamp saving more than 80%, the same power brightness is 10 times the incandescent lamp.
(7) Green environmental protection. Does not contain lead, mercury and other polluting elements, no pollution to the environment.
3. Different applications
1. Laser light
Laser lights are often used in theaters, nightclubs, dance halls, outdoor advertising, landmarks, etc., and are also used in store advertising.
2, LED lights
Building exterior lighting, landscape lighting, sign and indicative lighting, space display lighting, entertainment venue and stage lighting, video screen, vehicle indicator lighting.