Liquid crystal lens and its driving method when performing 3D display, stereoscopic display device

Abstract

The invention discloses a liquid crystal lens which comprises a plurality of liquid crystal lens units with the same structure. Each liquid crystal lens unit comprises a first substrate, a second substrate, a first electrode, a second electrode, a dielectric layer, a first alignment film, a second alignment film, a liquid crystal material, two pairs of matched third electrodes and a strip-shaped shading layer. Each first electrode comprises a plurality of strip-shaped electrodes which are separated at a certain interval and arranged in parallel, one strip-shaped electrode is shared by two adjacent liquid crystal lens units, the two third electrodes are arranged on the dielectric layer, located between the dielectric layer and the first alignment film and further located at corresponding positions of strip-shaped electrodes on two opposite edges of a corresponding liquid crystal lens unit, each third electrode is provided with a cross section with predetermined height and predetermined shape, and the shading layer is arranged on the second substrate surface and located between the second substrate ad the second electrode. The invention further discloses a driving method and three-dimensional display device of the liquid crystal lens during three-dimensional display.

Description

technical field [0001] The invention relates to stereoscopic display technology, in particular to a liquid crystal lens capable of reducing crosstalk, a driving method for the liquid crystal lens when performing 3D display, and a stereoscopic display device with the liquid crystal lens. Background technique [0002] The three-dimensional display device that uses liquid crystal lenses to realize free three-dimensional display mainly uses the positive and negative electrodes respectively arranged on the two substrates on both sides of the liquid crystal layer, and applies driving voltages of different sizes to different electrodes, so as to create a positive and negative electrode between the two substrates. Vertical electric fields with different strengths are formed to drive liquid crystal molecules to align to form a variable-focus liquid crystal lens. Therefore, it is only necessary to control the voltage distribution on the corresponding electrodes, and the refractive ind...

AI Technical Summary

Problems solved by technology

It can be seen that although the optical path difference distribution curve of the liquid crystal lens unit after voltage optimization is basically close to the ideal parabola at the lens center, at the junction of the two liquid crystal lens units L1 and L2 (marked by a box in the figure), the liquid crystal lens 100 The optical path difference distribution still obviously deviates from the ideal parabola, which causes a large crosstalk in the stereoscopic display device using the liquid crystal lens 100, reducing the stereoscopic display effect and viewing comfort

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