Mengyuan Xie

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
In this paper, we established a optical model and optimized a double-sided hemispherical patterned sapphire substrate (PSS) for highly efficient flip-chip GaN-based light emitting diodes (LEDs). A simulation is conducted to study how light extraction efficiency changes with the change in the parameters of the unit hemisphere for LEDs fabricated on(More)
Most of the existed stage lighting control systems have problems, including difficulties of high cost, low intelligence, the installation and deployment and so on. A control system of stage LED light based on Android smart phone is proposed in this paper, the system contains three parts. The first part is the establishment of interface, users can adopt the(More)
In this paper, we established a optical model and made an analysis of GaN-based LED flip chip by double-sided PSS (patterned sapphire substrate). The result analysis shows that the small distance and large radius of micro-cylinder and micro-hemisphere for cylindrical and hemispherical PSS would be more effective to enhance LED efficacy. The hemispherical(More)
The paper introduces the aligned method of polarization maintaining fiber (PMF) combined the characteristic value methods with the correlation coefficient method. This method is based on side-view of fiber. The PMF is irradiated by parallel ray from lateral side and the observation plane where set a camera is on the other side. The side-view of PMF from the(More)
This study reports on the development of a cost- and time-effective means to optimize a double-sided spherical cap-shaped patterned sapphire substrate (PSS) for highly efficient flip-chip GaN-based light-emitting diodes (LEDs). A simulation is conducted to study how light extraction efficiency (LEE) changed as a function of alteration in the parameters of(More)
  • 1