LED light source packaging technology for innovative design is the key to rebirth of LED lighting . Most of the current LED lamps with low operating voltage (VF = 3.2V), high current (IF = 200-700mA) low-voltage LED lamp beads (LVLED). LED lamp bead work , only 30 % of the electrical energy into light energy , 70% of the energy is converted into heat , so the heat LED lamps if done well , a lot of heat accumulation of the lamp chamber is always in high temperature environments , switching constant current power supply electrolytic capacitor will be due to high temperature electrolyte depletion, leading to failure ; LED lamp beads in a high temperature environment of long-term and premature aging occurs .
Birth HVLED ( high voltage LED) lamp bead technology to indoor LED lighting brings new vitality , new ideas, new design ideas. Thus will be born a lot of whimsy LED lighting new products, new lamps. HVLED biggest feature is the high voltage (VF = 50-280VDC), low current (IF = 20-60mA), with the same power LVLED light board compared to its much lower heat . HVLED is the N series satellites Low LED die in the package into a pressure module , its application is very convenient.
Innovative LED packaging technology is based on the filament column HVLED concept and developed . The N pieces of low-power LED package die in series on a glass substrate , becomes different from the previous new package.
The N pieces of small power LED die is encapsulated in a glass column directly to the substrate . For example, each of the 28 pieces of 1016LED 0.02W die package in the long 38mm, diameter glass column base 1.5-1.6mm , using gold wire series . This LED VF filament column = 3.2X28 = 89.6V, IF = 10mA. The most important feature of LED filament column is 360-degree angle of light, high- voltage (75-90VDC), low current (10-15mA) driver working condition ; using high -quality LED die can produce high-brightness (75-95lm), high light efficiency (120-130lm / W), high color rendering index (90-95Ra), high reliability LED filament column ; blue and red LED die can mix and match different proportions to produce different color temperatures (2870-6020K ) the LED filament column . LED filament structure of the high-pressure column shown in Figure 3 , the substrate is encapsulated glass column of blue + red LED die , according to pre-set rules of order, both ends of the extraction electrode , after a series of gold , yellow or yellow-green spray phosphor , all wrapped . Note that when energized high voltage protection test . Such LED filament column is working in a small 10-15mA current, low-power state, the whole column is floating filament LED full access to air, heat flow, the heat is very low.
