We have developed a general ray-tracing method in the
geometrical-optics approach which enables the modeling of in general
inhomogeneous liquid crystal configurations. In this manuscript, we
discuss two prominent examples in which we calculate the optical
properties of two liquid crystal configurations. We first present
simulations of a liquid crystal-based electro-optical device that
enables a switching effect due to a back reflection phenomenon. In
these simulations, we exploit the optical properties of a liquid
crystal with a special Freedericksz alignment. Secondly we
present preliminary results of the optical properties of a liquid
crystal-based optical element that can actively control guiding and
extraction of light. A promising application of such a device can be
found in for example beam control devices for lighting applications
or applications that require local dimming and highlighting.
The use of an LCD equipped with lenticular lenses is an attractive route to achieve an autostereoscopic multi-view 3D
display without losing brightness. However, such a display suffers from a low spatial resolution since the pixels are
divided over various views. To overcome this problem we developed switchable displays, using LC-filled switchable
lenticulars. In this way it is possible to have a high-brightness 3D display capable to regain the full native 2D resolution
of the underlying LCD. We showed the feasibility of LC-filled switchable lenticulars in several applications. For
applications in which it is advantageous to be able to display 3D and 2D on the same screen, we made a prototype
having a matrix electrode structure. A problem with LC-filled lenses is that in the 2D state there is a residual lens effect
at oblique angles. This effect and a possible solution are discussed as well.
We discuss residual lens effects in multi-view switchable auto-stereoscopic lenticular-based 2D/3D displays. With the introduction of a switchable lenticular, it is possible to switch between a 2D mode and a 3D mode. The 2D mode displays conventional content, whereas the 3D mode provides the sensation of depth to the viewer. The uniformity of a display in the 2D mode is quantified by the
quality parameter modulation depth. In order to reduce the modulation depth in the 2D mode, birefringent lens plates are investigated analytically and numerically, by ray tracing. We can conclude
that the modulation depth in the 2D mode can be substantially decreased by using birefringent lens plates with a perfect index match between lens material and lens plate. Birefringent lens plates do not disturb the 3D performance of a switchable 2D/3D display.
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