Li Xueling, Qiang Shengzhi, Xu Bin, Fu Xiuhua, Zhang Gong, Wang Yuanqing
Appl Opt. 2021 Mar 10;60(8):2331-2338. doi: 10.1364/AO.417280.
A stereoscopic display system based on a wavelength-multiplexed and time-multiplexed technique is introduced. The system includes white LEDs, complementary multiband bandpass filters, 30 double-side-lit light guide bars, and a liquid crystal display panel, as well as a pair of complementary multiband bandpass filter glasses. The LEDs are divided into two groups, and each group is covered with a kind of complementary multiband bandpass filter. They can be controlled by the driving circuit and work in the scanning mode in synchronization with the liquid crystal display panel, as the liquid crystal display panel displaying the left and right images frame by frame. The backlight for the left and right images is sampled by complementary multiband bandpass filter1 and complementary multiband bandpass filter2, respectively, and can only pass through the corresponding glass lens, realizing channel separation. A prototype based on this principle was set up and experiments were carried out to evaluate the performance of the system. Double-side-lit backlight with light guide bars ensures the uniformity of the backlight while using fewer LEDs, and therefore reducing power consumption. Brightness through complementary multiband bandpass filter1 and complementary multiband bandpass filter2 is about 50.5 nits and 55.5 nits, respectively. It is demonstrated in our system that the scanning backlight with 30 light guide bars is capable of reducing cross talk to 2.2%. Furthermore, the resolution in the wavelength-multiplexed 3D mode is the same as the physical resolution of the liquid crystal display panel.
介绍了一种基于波长复用和时分复用技术的立体显示系统。该系统包括白色发光二极管、互补多波段带通滤波器、30根双侧照明导光条、一个液晶显示面板以及一副互补多波段带通滤光眼镜。发光二极管分为两组，每组覆盖一种互补多波段带通滤波器。它们可由驱动电路控制，并与液晶显示面板同步以扫描模式工作，液晶显示面板逐帧显示左右图像。左右图像的背光源分别由互补多波段带通滤波器1和互补多波段带通滤波器2采样，且只能透过相应的玻璃镜片，实现通道分离。基于此原理搭建了一个原型，并进行了实验以评估该系统的性能。带有导光条的双侧照明背光源在使用较少发光二极管的情况下确保了背光源的均匀性，从而降低了功耗。通过互补多波段带通滤波器1和互补多波段带通滤波器2的亮度分别约为50.5尼特和55.5尼特。在我们的系统中证明，带有30根导光条的扫描背光源能够将串扰降低到2.2%。此外，波长复用3D模式下的分辨率与液晶显示面板的物理分辨率相同。
