Novel biconvex structure electrowetting liquid lenticular lens for 2D/3D convertible display

Abstract

Recently, a planoconvex structure electrowetting lenticular lens capable of 2D/3D conversion through a varifocal property by an electrowetting phenomenon has been developed. However, even though it has a similar planoconvex structure to that of a commercial solid lenticular lens, comparable 3D performance could not be realized because the refractive index difference between nonconductive liquid and conductive liquid was not large. Therefore, the goal of the present study is to obtain better 3D performance compared to the conventional planoconvex structure by introducing a novel biconvex structure using ETPTA. The newly developed biconvex structure electrowetting lenticular lens showed greatly improved characteristics compared to the planoconvex structure: dioptric power (171.69D → 1,982.56D), viewing angle (26degrees → 46degrees), and crosstalk ratio (27.27% → 16.18%). Thanks to these improvements, a fine 3D image and a natural motion parallax could be observed with the biconvex structure electrowetting lenticular lens. In addition, the novel biconvex structure electrowetting lenticular lens was designed to achieve a plane lens state with a no voltage applied condition, and as such it could show a clean 2D image at 0 V. In conclusion, a novel biconvex structure electrowetting lenticular lens showed 2D/3D switchable operation as well as excellent 3D performance compared to a solid lenticular lens.

Optofluidic lenses for 2D and 3D imaging

“…[ [137][138][139][140], elastomer-liquid lenses [141] or LC lenses [142,143] can be used. In an electrowetting lenticular display design, an electrowetting lens array is formed by placing an oil solution in an array of micro-wells and encapsulated by water.…”

中国光学十大进展：可调谐微透镜阵列的研究进展（特邀）

“…(c) transmission spectra and the corresponding focusing intensity distributions along the zaxis (x=y=0) of superlenses with pvalues of 450 nm, 550 nm, 650 nm, and 750 nm, respectively, after stretching [74] ; (d) a tunable superlens consisting of a fixed superlens and a tunable superlens consisting of a movable superlens, where, as designed, a small change in the distance between the two lenses leads to a large change in the focal length [75] 1000002 -9 display conversion [90] ; (b) measurement results of biconvex lens refractive error with voltage change [93] ; (c) 3D scene and 2D picture display effect in 2D/3D display mode [93] 图…”