Switchable 2D/3D display based on a liquid crystal lens array and the rotating specimen shooting method

Abstract

A liquid crystal (LC) lenticular lens array with auxiliary electrodes is proposed. The introduction of the auxiliary electrodes helps to obtain an LC lens array (LCLA) with relatively large aperture without complex structures. When the LCLA is in the focusing state, the voltage of auxiliary electrodes is less than that of edge electrodes, and the generated electric field in the LCLA can penetrate into the LC layer. Therefore, the ideal phase profile is obtained with a relatively thin LC layer thickness. Experimental results show that the LCLA has the characteristics of high optical power and low operation voltage. Based on the proposed LCLA, a multi-view 2D/3D switchable display is realized. In the experiment, a series of parallax images is obtained by rotating the sample to replace the convergence shooting method for 3D imaging. Compared with other 2D/3D switchable display devices, the multi-view 2D/3D switchable display based on the LCLA is characterized by being thin and compact, and displaying no moiré pattern.

Four-channel voltage-driven cylindrical liquid crystal lenses with a laterally shiftable optical axis

“…LC lenses have been applied in many fields, such as imaging system [2][3][4][5][6], auto focus [7], optical tweeze [8,9], et.at,. In recent years, 3D display has become a research focus to enhance visual experience, and cylindrical LC lenses commonly used to increase depth of field [10][11][12][13][14] and enable switching between 2D and 3D display [15][16][17][18][19][20]. Although many structures of cylindrical LC lenses have been proposed [21][22][23][24][25][26], there are still some issues that need to be addressed, such as high driving voltage, complex control, complicated fabrication processes, and large aberrations.…”