Super multi-view near-eye 3D display with enlarged field of view
Super multi-view near-eye 3D display with enlarged field of view
复制标题
视野扩大的超级多视角近眼3D显示
DOI：
10.1117/1.oe.60.8.085103
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发表时间：
2021-08-01
影响因子：
1.3
通讯作者：
Teng, Dongdong
中科院分区：
文献类型：
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作者：
Liu, Lilin;Cai, Jiefan;Teng, Dongdong
基于时间复用的超多视点技术在近眼三维显示器上实现，成功克服了人眼的聚散调节冲突。提出的系统有两个目镜，分别为两个眼睛，其中每一个是由一个有机发光二极管（OLED）微显示器，投影透镜，和一个门孔阵列。选通孔径阵列由间隔小于观看者瞳孔直径的选通孔径组成，其附接到投影透镜并且按时间顺序选通投影透镜的出射孔径的不同空间段。通过同步刷新相应的显示内容，通过门孔阵列将穿过显示点的两条或多条光线依次引导到每只眼睛中。基于视觉的持久性，这些光线会聚成眼睛可以自然聚焦的空间光斑，从而实现聚焦距离和会聚距离之间的一致性。此外，为了获得更大的视场，设计了具有偏振特性的门孔阵列，并在每个目镜的门孔阵列和OLED微显示器之间插入半波可变延迟器。采用两个120 Hz帧速率的OLED微型显示器，近眼3D显示器原型已被证明具有40度的FOV和40 Hz的显示频率，不受VAC的影响。
Based on temporal-multiplexing, super multi-view (SMV) technology gets implemented on a near-eye three-dimensional (3D) display, successfully overcoming the vergence accommodation conflict (VAC). The proposed system has two eyepieces for two eyes, respectively, each of which is constructed by an organic light-emitting diode (OLED) micro-display, a projecting lens, and a gating-aperture array. The gating-aperture arrays, consisting of gating apertures with an interval smaller than the diameter of the viewer’s pupil, are attached to the projecting lenses and gate different spatial segments of the projecting lens’s exit aperture in time sequence. Through refreshing the corresponding display contents synchronously, two or more light rays passing through a displayed point are guided by the gating-aperture array into each eye sequentially. Based on the persistence of vision, these light rays converge into a spatial light spot that the eye can focus on naturally, thus enabling a consistence between focusing distance and convergence distance. Further, gating-aperture array with polarization characteristics is designed to get a larger field of view (FOV), accompanied by a half-wave variable retarder being inserted between the OLED micro-display and the gating-aperture array in each eyepiece. Employing two OLED micro-displays of 120-Hz frame rates, a near-eye 3D display prototype has been demonstrated with an FOV 40 deg and a display frequency of 40 Hz, being free from VAC.