33.2: Optical Design and Simulation by Optimizing LGP Pattern for Wearable Display

With wearable display developing to the direction of thinner and narrow bezel, side‐emitting LED backlight has become more difficult to optimize the optical display screen, especially hot spot and dark corner. The distribution of LGP net dot plays an important role to the surface brightness and uniformity of LCD. This paper discussed a method of distributed algorithm of LGP pattern. Considering the risk of hot spot and dark corner, the new algorithm is related to LED pitch and the distance between LED and active area. Through the program we write by MATLAB, we can get the pattern density of mesh, the number of pattern and all coordinates of the pattern. The coordinates of the pattern can be saved as txt for Optisworks simulations. The coordinates of the pattern can also apply to the pattern form of laser and strike. In practice, this research can help to reduce cost and save time at processing of BLU.