Multi-view 3D display using one-dimensional scanning and light source array

我们构造了一种新的三维显示器，它采用一维光束扫描和光源阵列。并测试了人体对三维显示器的反应，检验了电流计扫描的准确性。实验结果表明，在扫描频率为60 Hz时，常规振镜扫描精度可达50 μm;在扫描频率为200 Hz时，共振扫描精度可达30μm。利用该扫描仪可以同时显示50幅以上的图像，并测量了光源的调制特性。结果表明，LED和LD都可以实现20 MHz以上的频率调制。我们成功地实现了与光束扫描同步的光源调制，并利用上述基本实验结果设计了一种新的三维显示系统。将64个彩色LCD面板进行二维排列，在不同的水平方向上显示图像。为了生成3D图像，需要64个视频信号。使用了64个帧存储器，并由8台PC控制。该PC集群由主机通过千兆以太网控制。利用CG软件对液晶显示器上显示的64幅图像进行渲染，并将3D显示器与PC集群相结合，成功地生成了三维图像。由于传统的3D显示器在观察过程中存在疲劳的问题，因此人体反应的测量对于3D显示器的研究非常重要。通过使用该系统生成的3D图像的调节反应的测量的双折射fract-meter。结果表明，对3D图像的反应与对真实的3D物体的反应非常相似。

We constructed a new 3D display which employs one-dimensional beam scanning and light source array. The human responses to the 3D display were also measured.The accuracy of beam scanning by galvano-meter was examined. The experimental results showed that the conventional galvalo-scanner had the beam scanning accuracy of 50 μm at the scanning frequency of 60 Hz, and that the resonance scanner had that of 30μm at the scanning frequency of 200 Hz. Consequently, over 50 images can be displayed simultaneously by use of the resonance scanner.The modulation characteristics of light sources were also measured. The results showed that both LED and LD could modulate beams with the sufficient frequency of over 20 MHz. We succeeded to modulate the light sources synchronizing to the beam scanning.We designed a new 3D display system using the above basic experimental results. Sixty-four color LCD panels were aligned two-dimensionally and their images were displayed into different horizontal directions.For the generation of 3D images, 64 video signals are required. Sixty-four frame memories were used and were controlled by eight PC's. This PC cluster was controlled by a host computer via a gigabit Ethernet. Sixty-four images displayed on the LCD's were rendered by use of CG software.Three-dimensional images were successfully generated by the combination of the 3D display and the PC cluster. The measurements of human responses are very important for the research of 3D displays because the conventional 3D displays are known to have the problem of the fatigue during the observation. The accommodation responses to the 3D images generated by our system were measured by use of the 〓fract-meter. The results showed that the responses to the 3D images were quite similar to those to real 3D objects.