What are the types of light sources?

1. Halogen lamp

Halogen lamps are the most common source of car headlights on the road today. In fact, halogen lamp is really a variant of incandescent lamp, also called tungsten halogen lamp or quartz lamp brand, created in the 1960s, the reason is on the basis of incandescent lamp, in the outside of the lamp to participate in bromine and iodine and other gases, so as to ensure that the lamp shade will not turn black at the same time, the brightness is 1.5 times higher than incandescent lamp, life is also strengthened 2-3 times.

Advantages: Halogen lamps inherit the advantages of incandescent lamps, complex structure, expensive, complex brightness mediation and mastery, and good color rendering, so that many models will use halogen lamps as a lamp source.

Defects: But the relative halogen lamp defects are also compared to clear, that is, its life is compared to the lamp source is shorter, the luminous obedience is lower, generally only 6%-10% can be converted into light energy, and other parts are distributed by thermal energy. Halogen lamps are slightly darker than xenon lamps and LED lamps.

Two, xenon lamp

The xenon lamp is larger than the halogen lamp, which is through the anti-ultraviolet quartz glass tube, participating in various chemical gases, such as xenon and other inert gases and iodide, and then through the supercharger the 12 volt DC voltage on the car is immediately pressurized to 23000 volts of voltage, experiencing high voltage shock to stimulate the xenon electron ionization in the quartz tube. A light source occurs between the two electrodes. Compared with halogen lamps, xenon lamps only need 3.5A point flow at the task, but the brightness is indeed three times that of halogen lamps, and the service life is 10 times longer than that of halogen lamps.

Advantages: The color temperature of the xenon lamp is similar to that of sunlight, but it contains more green and blue identities, resulting in blue-white light. This blue-white light greatly enhances the brightness of road markings and signage. At the same time, xenon lamps have a higher luminous obedience, and have higher clarity when driving at night and in fog. And compared to halogen lamps, xenon lamps consume less energy and throttle nearly 50% more power than halogen lamps. At the same time, the submission of electrical energy into light energy is also more than 70% stronger than halogen lamps, so that xenon lamps have a relatively high energy density and light intensity.

Defects: The defects of xenon lamp if its concentrating property is not good, the light is dispersed. And because the color temperature of the xenon lamp is high, it is in the face of poor visibility in the climate, such as the fog climate and haze climate, the light of the xenon lamp will be diffused in the atmosphere of the fine particles, thus forming a long-term white trouble, which has a great impact on safe driving, so that many models today are accepting near-light xenon far-light halogen collocation. Moreover, the lighting time of xenon lamp is slow, it usually takes 2 seconds to reach the highest brightness, so that it will not use xenon lamp, and accept the lighting of fast LED lamp.

Three, LED lights

LED lights are the preferred lighting devices of many consumers today. In fact, the LED lamp is an electroluminescent semiconductor data chip, solidified to the bracket with silver glue or white glue, and then connected to the chip and circuit board with silver or gold wire, sealed around with epoxy resin, to maintain the influence of the external core wire, the initial device shell, so that the seismic function of the LED lamp is good. And because of the smaller size of the LED lights, there will be more changes in the display.

Advantages: The disadvantages of LED lights are mainly in its energy saving and environmental protection, long life and anti-strike ability. White LED energy consumption is only 1/10 of incandescent lamps, 1/4 of energy-saving lamps, energy consumption is very low, but it has a higher brightness than xenon lamps. And in the aspect of longevity noodles can reach 5-10 thousand hours, it is very durable. And LED anti-strike anti-lightning strength, no ultraviolet and infrared radiation, harmful to the human body, is a very environmentally friendly and robust lamp body.