Author Affiliations
Abstract
1 School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, China
2 Xihua University, Chengdu 610039, China
A micro-projection dynamic backlight for multi-view three-dimensional (3D) display is proposed. The proposed backlight includes a light emitting diodes (LEDs) array, a lenticular lens array, and a scattering film. The LED array, the lenticular lens, and the scattering film construct a micro-projection structure. In this structure, the LEDs in the array are divided into several groups. The light from each LED group can be projected to the scattering film by the lenticular lens and forms a series of bright stripes. The different LED groups have different horizontal positions, so these bright stripes corresponding to different LED groups also have different horizontal positions. Therefore, they can be used as a dynamic backlight. Because the distance between the LEDs array and the lenticular lens is much larger than the distance between the lenticular lens and the scattering films, the imaging progress will make the width of the bright stripes much smaller than that of the LEDs, and the pitch of the stripes is also decreased. According to the 3D display theory, the bright stripes with small width and pitch help to increase the number of views. Therefore, the proposed micro-projection dynamic backlight is very suitable for multi-view 3D display. An experimental prototype was developed, and the experimental results show that the micro-projection dynamic backlight can correctly complete the directional projection of the parallax images to form a 3D display.
dynamic backlight 3D display multi-view Chinese Optics Letters
2021, 19(9): 092201
1 成都工业学院 电子工程学院, 四川 成都 611730
2 电子科技大学 光电科学与工程学院, 四川 成都 610054
3 四川大学 电子信息学院, 四川 成都 610065
为了解决观看视角与光学效率的相互制约关系, 设计了一种基于可变孔径针孔阵列的集成成像3D显示器, 建立了3D成像模型, 通过几何光学推导观看视角以及光学效率的计算公式; 详细阐述了如何通过改变透光孔的孔径宽度来调节观看视角以及光学效率; 研制了基于可变孔径针孔阵列的集成成像3D显示样机, 通过液晶显示屏实现电控可变孔径针孔阵列, 通过实验验证了可以通过增大或者减小透光孔的孔径宽度来增大3D图像的亮度或者观看视角。
集成成像 可变孔径 针孔阵列 观看视角 光学效率 integral imaging variable-aperture pinhole array viewing angle optical efficiency 红外与激光工程
2018, 47(6): 0603005