LED lighting application trends and heat dissipation problems Due to the continuous advancement of solid state lighting technology, LED luminous efficiency has been improved in recent years, and it has gradually replaced traditional light sources. At present, luminous efficiency has been chasing incandescent lamps and halogen lamps and continues to grow. As shown in Figure 1. Some companies have developed LED components with efficiency exceeding 100lm/W, which makes LED lighting applications more and more widely used. It has not only been applied to indoor and outdoor lighting, mobile phone backlight modules and car direction lights, etc. Applications such as high-wattage projection lights and street lights, large-size backlight modules, and automotive headlights. Due to the advantages of power saving, environmental protection and long life, the trend of LED light source in the future is becoming more and more obvious.
Figure 1 LED luminous efficiency trend comparison
In order to make the LED emit brighter light, it needs to input higher power. However, the current photoelectric conversion efficiency (WPE) value of the high-power LED is still limited, generally only about 15~25% of the input power becomes Light, the other is converted into heat. Since the LED chip area is small (~1mm2), the heat generation (heating density) per unit area of ​​the high-power LED is very high, even more serious than the general IC component, and the junction temperature of the LED chip is also (Junction Temperature). Greatly improved, it is easy to cause overheating problems. Excessively high junction temperature of the wafer will reduce the luminance of the LED, with the red light being most pronounced. It will also cause the wavelength shift of the LED to affect the color rendering, which will cause the LED reliability to be greatly reduced. As shown in Figure 2, the heat dissipation technology has become the bottleneck of the current LED technology development.
Figure 2 Relationship between component lifetime and wafer temperature
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Power connector, which includes an insulating body and a plurality of terminals, the insulating body has a plurality of holding slots which hold the terminals, the insulating body is additionally provided with at least one tongue piece which isolates the terminals, the terminals are respectively provided with a barb, the terminals are respectively extended outwards on the first side of the barbs with a plurality of contact parts, and the second barb A plurality of wires are fixed at the side; through the above structure, the barb of the terminal can be embedded in the insulation body, and the terminal is easy to assemble, and only needs to be pushed into the insulation body, and there is no short circuit equivalent energy between the terminals.
Battery Connector
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