Light guide plate (LGP) plays an irreplaceable role in backlight module of liquid crystal display (LCD) systems. Based on interactive design of Gtools and Tracepro, we propose an effective design method of scattering dots array for LCD backlight in this paper. This method first initializes the scale of the scattering dots in Gtools, then evaluates illumination distribution in Tracepro, and finally determines the array layout of the scattering dots from the interactive optimization between Gtools and Tracepro. This method can flexibly adjust the light emission in each sub-area of the LGP, which has scientific significance and practical value in some ways.
Light Guide Plate (LGP) plays an irreplaceable role in Liquid Crystal Display (LCD) backlight. LGP with quantum-dot (QD) shows promise in the development of next-generation displays because of QDs’ beneficial characteristics. In this paper, we present a novel QD LGP for LCD backlight based on QD scattering microstructure array (SMA), in which the QD net dots are located discretely and arranged in arrays on the bottom surface of LGP. The paper first introduces the QD backlight briefly, then discusses the preparation and fabrication process of the proposed prototype, and finally presents a systematic photometric approach to reveal the remarkable advantages of QD backlight. The white-balance is achieved by adjusting the proportion of the QDs in the mixture and optimizing the R-QD / G-QD ratio. The apparent morphology of QD SMA is characterized by OLYMPUS laser microscope, while the optical properties of QD backlight are investigated by F-4600 fluorescence spectrophotometer and SRC-200M spectrum color luminance meter, respectively. Experimental results show that the white balance can be achieved when the QDs account for a certain proportion about 7% within the mixture, and the ratio of R-QD / G-QD is optimized to about 1:12. The proposed system offers an alternative and feasible method for fabricating QD backlight, which may have great application prospects in the future.