In recent years, the strengthening of public energy awareness and the maturity of LED lighting technology have promoted the initial formation of the LED lighting market to a certain extent, and there is a growing trend. However, the LED lights on the market also exposed a thorny problem, that is, the glare and spot of the LED and the problem of strong light directivity.
For LED dazzling problems, various manufacturers have adopted a variety of methods, such as the use of brushed PC masks, the use of frosted masks, the use of special phosphor materials, etc., but these methods are not ideal, the brushed mask can Eliminate glare, but the spot phenomenon is more serious. People spend a little longer under this kind of lamp. The eyes are prone to fatigue. If you use the eye under such a lamp for a long time, it will cause the eyes to astigmatize. The frosted and milky white mask will reduce the light loss. Too big, the effect is too bad.
LED lighting is a bright future market. Industry insiders suggest that engineers should pay attention to the LED lighting efficiency, luminous flux and service life when this market is just formed.
However, after the optical film is used, the eye visually perceives that each LED is brighter but not glare, and the film makes the LED daylight line more uniform and the viewing angle is significantly wider. The working principle of the diaphragm is to make the LED point light source which is irradiated onto the diaphragm into a uniform output of the surface light source, so that the problem of glare, light spot and widening the illumination range can be solved at the same time. In addition, the diaphragm transmits light. The rate is above 90, and the influence of the contrast is limited.
The use of an optical diaphragm not only eliminates the spot that is unique to the LED, but also broadens the angle of illumination. Since the LED fluorescent lamps are arranged in two rows or three rows, there is a gap between the light emitted by the respective point sources, so that a spot is generated within a certain distance; after the optical film is used, the optical film uniformly spreads the incident point source light. It turns into a divergent light source, so that the light becomes very uniform and completely solves the spot problem.
In addition, the LED has a very strong directionality, and the illumination angle is about 120 degrees, which is easy to produce an illumination blind zone. After the optical film is used, the light irradiation range can be extended to about 180 degrees due to the unique diffusibility of the optical film. Effectively eliminate the blind spot of illumination.
LED fluorescent lamps use optical diaphragms to illuminate the same number of LED fluorescent lamps. In the same area of ​​space, the LED fluorescent lamps with diaphragms have no illumination blind spots, uniform light, and the lighting effect far exceeds that of ordinary LED fluorescent lamps. And the greater the required illumination area, the more obvious this advantage.
Electrolytic capacitor
The electrolyte material inside the electrolytic capacitor, which has charge storage, is divided into positive and negative polarity, similar to the battery, and cannot be connected backwards.A metal substrate having an oxide film attached to a positive electrode and a negative electrode connected to an electrolyte (solid and non-solid) through a metal plate.
Nonpolar (dual polarity) electrolytic capacitor adopts double oxide film structure, similar to the two polar electrolytic capacitor after two connected to the cathode, the two electrodes of two metal plates respectively (both with oxide film), two groups of oxide film as the electrolyte in the middle.Polar electrolytic capacitors usually play the role of power filter, decoupling (like u), signal coupling, time constant setting and dc isolation in power circuit, medium frequency and low frequency circuit.Non-polar electrolytic capacitors are usually used in audio frequency divider circuit, television S correction circuit and starting circuit of single-phase motor.
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