Study on Optical Consistency of Centrifuged LEDs in Packaging Processes

Advances in Quantum-Dot-Based Displays

“…In addition, the radiant power and the luminous flux for the reference and c-HS structure are compared with the various correlated color temperature (CCT) values as shown in Figure 9a,b and from the figure it is very clear that the radiant power and the luminous flux of the Q-P hybrid WLEDs with c-HS structure are obviously higher than that of the reference structure with an improvement of 13.6% and 10.8% respectively, at a standard warm white color of In Figure 8a, QDs are mixed with silicone, then the mixture is dispensed on the blue chip and subsequently treated in the oven at 150 • C. A hollow semi-spherical lens is inserted into the frame of the device structure and phosphor slurry (phosphorus mixed with silicone) is then pumped into the hollow space followed by 3-hour heat treatment at 100 • C in the oven. Centrifugation technology is commonly used to monitor the phosphorus distribution in the device and this will help to increase the color uniformity of phosphor-converted LEDs [66,67]. Therefore, centrifugation technology is adopted for this c-HS structure to monitor the phosphorus settlement after injection of phosphor, which is again processed in the oven to complete the packaging.…”

“…A hollow semi-spherical lens is inserted into the frame of the device structure and phosphor slurry (phosphorus mixed with silicone) is then pumped into the hollow space followed by 3-hour heat treatment at 100 °C in the oven. Centrifugation technology is commonly used to monitor the phosphorus distribution in the device and this will help to increase the color uniformity of phosphor-converted LEDs [ 66 , 67 ]. Therefore, centrifugation technology is adopted for this c-HS structure to monitor the phosphorus settlement after injection of phosphor, which is again processed in the oven to complete the packaging.…”