基于LED发光特性的空间三维显示系统的研究
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摘要
空间三维显示技术是最符合人眼观看世界习惯的三维显示技术,是未来三维显示技术发展的重要方向。近些年来各类型空间三维显示系统迅速发展起来,但是大显示空间、高分辨率的空间三维显示系统却寥寥无几。本论文针对大型空间三维显示存在的技术难点,在已有研究成果的基础上,开展了基于LED发光特性的空间三维显示系统的研究。
本论文基于空间三维显示系统光场分布原理,提出了空间三维显示系统显示空间光场的描述方法,以及空间三维显示光场描述维度和显示系统数据吞吐量的关系。论文还分别对基于LED平面屏的体三维显示和基于LED柱面屏的全景视场三维显示原理进行了详细论述,分别推导了其对于空间光场分布描述的表达式,分析了其数据流量及显示特性,并给出了系统实物图和显示画面。
在三维显示系统的驱动、数据传输和管理上,引入光纤断点传输技术实现了旋转系统中海量数据的传输,利用PCI-E总线技术拓展了信道带宽,实现了实时体素化和数据的准实时更新。将LED屏幕设计模块化,设计了基于两级FPGA的高并行度的寻址电路实现了海量数据的高速空间寻址。定义了空间三维信号数据帧格式,并实现了对海量数据高效组织管理。设计光耦时钟信号触发系统保证三维画面的空间同步与正常显示。
本论文分别针对空间三维显示亮度和色度均匀性提出了一套评价参数。提出了分析LED体三维显示中黑线区域边界划分的临界角公式。分别对LED体三维和LED全景视场三维显示系统的亮度和色度均匀性进行了测试研究。测试分析表明影响基于LED平面屏的体三维显示系统亮度和色度均匀性的主要因素是黑线问题。基于LED柱面屏的全景视场三维显示系统亮度和色度均优于基于LED平面屏的体三维显示系统,结合显示原理和光场描述方法分析了LED体三维和LED全景视场三维显示亮度和色度均匀性差异的原因,提出了改变LED排布方式来提高亮度和色度均匀性的方法。
Spatial three-dimensional (3D) display technology, as a promising trend of the 3D display technology, is mostly corresponding to the human's habits of observing the world. Resent years, various types of spatial 3D display systems have developed rapidly, but rarely for the large display space and high resolution ones. Considering this situation, we investigate the spatial 3D display system based on the light-emitting properties of LED.
In this paper, the theory of the light field rendering of the spatial 3D display system was raised, as well as the method of how to render the light field. The relationship between the data bandwidth and the light field rendering of the 3D display space was analyzed. The theory of the volumetric 3D display system based on a rotation planar LED screen and the omnidirectional multiview 3D display system based on a cylindrical LED screen were discussed respectively. The formulas that describe the light field rendering were deduced. The data bandwidth and the display characteristics were also analyzed.
Large data transmission in the rotation system was achieved by using rotatable fiber optic joint. The real-time voxelization and quasi-real-time update were achieved by expanding the bandwidth with PCI-E bus. The fast spatial addressing circuit based on the two grades of FPGA for large data was achieved by using the modular screen. The 3D image was controlled by the time signal provided by the optocupler. The data organization methods of the two types of spatial 3D display systems were presented respectively.
The evaluation parameters of the luminance uniformity and color uniformity were raised. There always exists a black line zone in the middle of the volumetric 3D display system for a rotation LED screen. We deduced the formula with the critical angles of how to describe the boundaries of the black line zone. The luminance uniformity and color uniformity of the volumetric 3D display system and omnidirectional multiview 3D display system based on the LED screen were studied. According to the analysis, the black line zone was the main reason for the luminance and color non-unoformily of the volumetric 3D display system based on the rotation LED screen. The luminance and color uniformity of the omnidirectional multiview 3D display system based on a cylindrical LED screen were much better than the volumetric 3D display system based on the rotation LED screen. The reasons for the luminance and color uniformity difference between these two systems were analyzed in detail. Besides, we introduced the method of improving the luminance and color uniformity of the systems by reranging the LED pixels in the screen.
本论文基于空间三维显示系统光场分布原理,提出了空间三维显示系统显示空间光场的描述方法,以及空间三维显示光场描述维度和显示系统数据吞吐量的关系。论文还分别对基于LED平面屏的体三维显示和基于LED柱面屏的全景视场三维显示原理进行了详细论述,分别推导了其对于空间光场分布描述的表达式,分析了其数据流量及显示特性,并给出了系统实物图和显示画面。
在三维显示系统的驱动、数据传输和管理上,引入光纤断点传输技术实现了旋转系统中海量数据的传输,利用PCI-E总线技术拓展了信道带宽,实现了实时体素化和数据的准实时更新。将LED屏幕设计模块化,设计了基于两级FPGA的高并行度的寻址电路实现了海量数据的高速空间寻址。定义了空间三维信号数据帧格式,并实现了对海量数据高效组织管理。设计光耦时钟信号触发系统保证三维画面的空间同步与正常显示。
本论文分别针对空间三维显示亮度和色度均匀性提出了一套评价参数。提出了分析LED体三维显示中黑线区域边界划分的临界角公式。分别对LED体三维和LED全景视场三维显示系统的亮度和色度均匀性进行了测试研究。测试分析表明影响基于LED平面屏的体三维显示系统亮度和色度均匀性的主要因素是黑线问题。基于LED柱面屏的全景视场三维显示系统亮度和色度均优于基于LED平面屏的体三维显示系统,结合显示原理和光场描述方法分析了LED体三维和LED全景视场三维显示亮度和色度均匀性差异的原因,提出了改变LED排布方式来提高亮度和色度均匀性的方法。
Spatial three-dimensional (3D) display technology, as a promising trend of the 3D display technology, is mostly corresponding to the human's habits of observing the world. Resent years, various types of spatial 3D display systems have developed rapidly, but rarely for the large display space and high resolution ones. Considering this situation, we investigate the spatial 3D display system based on the light-emitting properties of LED.
In this paper, the theory of the light field rendering of the spatial 3D display system was raised, as well as the method of how to render the light field. The relationship between the data bandwidth and the light field rendering of the 3D display space was analyzed. The theory of the volumetric 3D display system based on a rotation planar LED screen and the omnidirectional multiview 3D display system based on a cylindrical LED screen were discussed respectively. The formulas that describe the light field rendering were deduced. The data bandwidth and the display characteristics were also analyzed.
Large data transmission in the rotation system was achieved by using rotatable fiber optic joint. The real-time voxelization and quasi-real-time update were achieved by expanding the bandwidth with PCI-E bus. The fast spatial addressing circuit based on the two grades of FPGA for large data was achieved by using the modular screen. The 3D image was controlled by the time signal provided by the optocupler. The data organization methods of the two types of spatial 3D display systems were presented respectively.
The evaluation parameters of the luminance uniformity and color uniformity were raised. There always exists a black line zone in the middle of the volumetric 3D display system for a rotation LED screen. We deduced the formula with the critical angles of how to describe the boundaries of the black line zone. The luminance uniformity and color uniformity of the volumetric 3D display system and omnidirectional multiview 3D display system based on the LED screen were studied. According to the analysis, the black line zone was the main reason for the luminance and color non-unoformily of the volumetric 3D display system based on the rotation LED screen. The luminance and color uniformity of the omnidirectional multiview 3D display system based on a cylindrical LED screen were much better than the volumetric 3D display system based on the rotation LED screen. The reasons for the luminance and color uniformity difference between these two systems were analyzed in detail. Besides, we introduced the method of improving the luminance and color uniformity of the systems by reranging the LED pixels in the screen.
引文
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[5]E.Luzy, C. D., Procede pour obtenir des projections en relief. French Patent [J] 1914,461600.
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