高密度LED显示屏莫尔条纹抑制研究

Elimination of the Moiré Phenomenon of High-density LED Display Screen

为了抑制数码相机拍摄LED显示屏时图像中存在的莫尔条纹现象,对莫尔条纹产生的机理及其特性进行了理论分析。提出了利用多层散射膜抑制高密度LED显示屏莫尔条纹的方法。利用光学模拟程序对莫尔条纹抑制装置进行了仿真验证,对其中的关键参数进行了优化。利用优化后的莫尔条纹抑制结果在P2.5mm高密度LED显示样箱上进行了实验验证。实验观察结果与理论分析吻合,该装置可大幅度降低莫尔条纹的对比度,证明了方法的有效性。

In order to eliminate the Moire´ phenomenon in LED display screen of digital camera, the mechanism and the characteristics of Moire´ phenomenon were analyzed. A method of eliminating the Moire´ phenomenon of high-density LED display screen which uses multiple optical scattering films was proposed. The Moire´ phenomenon elimination device was simulated by using optical simulation program. Moreover, the key parameters of the Moire´ phenomenon elimination device were optimized. A verification experimentation was demonstrated on a P2.5 mm high-density LED display screen sample box using the optimized Moire´ phenomenon elimination device. The experimental results coincided with the theoretical analysis. The optimized device can greatly reduce the contrast of the Moire´ phenomenon of LED display screen. Therefore, it can be proved that the method we proposed to eliminate the Moire´ phenomenon of high-density LED display screen is effective.