Laser emission from perylene in solution is obtained by means of energy transfer be-tween 9-methylanthracene (donor) and perylene (acceptor). From the experimental result of the time-resolved fluorescence spectra and the Stern-Volmer relation of the dye mixture solution, the energy transfer is attributed to the dipole-dipole interaction. Laser power from dye mixture solution is measured at various concentrations of donor and acceptor. At the optimum concentrations, the laser power from the mixture solution is about six times larger than that of the perylene solution.
It is shown that, in large-area liquid crystal display (LCD) devices, the cell gap fluctuation after the introduction of LC decreases to about half of the one before. This results from a self-bending effect of glass plates due to the surface tension of the introduced nematic LC. Taking into account this effect and display uniformity, a practical criterion for the cell gap uniformity of large-area LCD devices is determined.