摘要
液晶显示存在对比度不高的固有问题,已受到OLED显示技术的巨大冲击。双层液晶显示能有效降低漏光,提高对比度,但由于存在两块液晶面板,显示两层图像,倾斜观看时双层液晶会出现伪影,影响显示质量。为解决这一问题,提出一种基于视角补偿的图像分割算法,记录不同视角下光线通过前后液晶面板的位置,建立相应的映射矩阵,通过计算优化两层屏幕的透过率,使得所有设定视角下重构图像和原图像的误差最小。仿真结果表明,在5个不同的视角下,基于本文算法处理后的图像峰值信噪比(PSNR)均高于现有模糊算法,由此说明本文算法能够较好地权衡双屏液晶显示的显示质量和视角。
Due to its low contrast ratio(CR),liquid crystal display(LCD)is greatly challenged by OLED.Dual-layer LCD can effectively reduce the light leakage and improve the CR.However,its two LC panels can display two layers of images,and displayed ghosts may appear in the case of oblique view,which deteriorates the display quality.To this end,we proposed a viewing-angle-compensation-based image segmentation algorithm.Then,the positions of light at different viewing angles that passed through the two LC panels were recorded and the mapping matrix was therefore established.The transmittance of the dual-layer LCDs was optimized to obtain the minimum error between the initial image and the reconstructed image at all the set viewing angles.The simulation results show that at five viewing angles,the proposed algorithm presents larger peak signal to noise ratio(PSNR)than the other existing algorithms,which proves that this algorithm can achieve a better tradeoff between image quality and viewing angles.
作者
冯奇斌
苏凯
王梓
吕国强
Feng Qibin;Su Kai;Wang Zi;LüGuoqiang(National Engineering Laboratory of Special Display Technology,National Key Laboratory of Advanced Display Technology,Academy of Opto-Electric Technology,Hefei University of Technology,Hefei,Anhui 230009,China;School of Instrument Science and Opto-Electronics Engineering,Hefei University of Technology,Hefei,Anhui 230009,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第10期42-47,共6页
Acta Optica Sinica
基金
安徽省科技重大专项(2019b05050001)。
关键词
衍射
液晶显示
双屏
图像分割
视角
算法
diffraction
liquid crystal display
dual-layer
image segmentation
viewing angle
algorithm
