Aiming at the problem of luminance uniformity for organic lighting-emitting diode (OLED) panels,a new brightness calculating method based on bilinear interpolation is proposed. The irradiance time of each pixel reaching the same lumi-nance is figured out by Matlab. Adopting the 64×32-pixel,single color and passive matrix OLED panel as adjusting luminance uniformity panel,a new circuit compensating scheme based on FPGA is designed. VHDL is used to make each pixel's irradiance time in one frame period written in program. The irradiance brightness is controlled by changing its irradiance time,and finally,luminance compensation of the panel is realized. The simulation result indicates that the design is reasonable.
A new series of mono-cyclometalated square planar platinum(Ⅱ) complexes have been synthesized and the single-crystal X-ray structures of complex 1 and 2 have been determined.The complexes have the general formula ppyPt(O^O),where ppy is 2-phenylpyridyl,and O^O is β-diketonate ancillary ligands with the acyl substituent group in position 3 of(D)-(+)-camphor.Although,like the many Pt(Ⅱ) complexes with square-planar geometry,these complexes have plane stacking modes in crystal structure,the sterically bulky camphor-derived groups compel extensive slipping of the molecular stacking planes,resulting in the negligible overlapping of the aromatic ring fragments between molecules and the considerable Pt-Pt distance.The resolved spectra and a little shifted emission in solid state of complexes show that there is significant reduction of π-π interactions and Pt-Pt interactions,and suggest these complexes may be good candidates for doped phosphorescent organic light emitting diodes(PhOLEDs) and even for nondoped PhOLEDs.
LUO KaiJun,XIE Yu,XU LingLing,WANG JiangWei,ZHANG LiFang & ZHAO KeQing College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610068,China
