摘要
双层液晶显示器采用两层液晶面板叠加显示,可大幅提高对比度,但是两层液晶面板之间存在一定间距,在离轴观看时会出现伪影现象。目前针对该问题的处理方法无法兼顾计算时间与显示质量。将卷积神经网络用于双层液晶显示,使用卷积神经网络对输入图像进行处理,并构建残差块来提升输出图像的质量,输出的两幅图像分别对应双层液晶显示器的两层液晶面板,然后将输出的两幅图像在不同视角下重建,并从计算时间和显示质量上与其他方法进行对比。仿真结果表明,该方法与基于模糊处理的算法相比,在计算时间和显示质量上均得到了提升;与基于视角补偿的算法相比,在保证显示质量的同时大大减小了计算时间。本文方法在具有较高显示质量的同时大大缩短了计算时间,更具实际应用性。
Liquid crystal displays(LCDs) have been widely used in consumer electronics,industrial control,medical equipment and other fields.However,the LC panel can not completely block the light from the backlight unit when displaying a black field,resulting in a low Contrast Ratio(CR).There are two techniques to improve CR,including dynamic dimming and dual-layer display.Dynamic dimming technology dynamically adjusts the backlight brightness and pixel grayscales according to the displayed image.At present,dynamic dimming technology is mainly divided into global dimming technology and local dimming technology.CR is proportional to the number of backlight partitions,but the number of backlight partitions is usually much smaller than the number of pixels on the LC panel,resulting in the inability of this technology to achieve pixel-level dimming.The more partitions,the higher the production cost.Another technology to improve CR is dual-layer display.Dual-layer display is to add a LC panel between the backlight and the LC panel,which can greatly reduce light leakage.However,as the two layer LC panels are bonded together with Optically Clear Adhesive(OCA),there is a physical gap between them.When the double-layer LCD is working,both the front and rear panels need to display images.If the input image is directly sent to the front and rear panels without processing,the corresponding pixels of the front and rear panels will be offset when viewing the screen off-axis,resulting in a ghost image.To improve the display quality when viewing off-axis,the input image needs to be split and modified.The common method is to blur the image to the rear panel near the backlight unit and compensate for the pixels of the front panel.It is quite simple to realize such a blurring solution,but the final display quality deteriorates because the resolution of the image to the rear panel becomes lower.In order to balance the relationship between viewing angle and display quality,researchers put forward an angle compensation algorithm.The algorithm e
作者
冯奇斌
张新
郑琛
王梓
吕国强
FENG Qibin;ZHANG Xin;ZHENG Chen;WANG Zi;LV Guoqiang(Academy of Photoelectric Technology,School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2023年第8期138-147,共10页
Acta Photonica Sinica
基金
安徽省科技重大专项(No.202203a05020028)。
关键词
双层液晶显示
伪影
卷积神经网络
显示质量
计算时间
Dual-layer liquid crystal display
Ghost image
Convolutional neural networks
Display quality
Computation time
