Simulation-based analysis of luminous environment of OLED lighting-integrated blinds for PV–OLED blind systems

Abstract

Photovoltaic (PV) blinds generate power and control the sunlight entering the rooms. The control of PV blinds to maximize the power generation is disadvantageous to the indoor lighting environment as it blocks daylight. This study developed a PV–OLED blind system with an organic light-emitting diode (OLED) lighting panel attached to the back of a PV blind slat. It maximizes PV power generation, supplements indoor illuminance, and enables easy installation because it is an integrated device. A simulation modeling method of OLED, a surface-type lighting that rotates according to the blind angle, was developed and verified using measurement values. In order to apply the surface-type lighting form, a method of applying several luminous intensity distribution data files was used where we divided the height and width of one OLED lighting panel. As the number of height divisions increased, the coincidence rate with the measured values of the simulation results tended to increase. Using the proposed modeling method, the indoor illuminance distributions according to the installation position of the OLED lighting panel and the control angle of the slat were analyzed. When the slat angle was close to 60°, the influence of OLED was the greatest, and the influence of daylight decreased as the slat angle was decreased. As the slat angle increased, insufficient daylight could be compensated with an OLED lighting panel. As the OLED lighting panel was installed in the lower part of the blinds, the uniformity ratio decreased, and the average illuminance increased.