70‐4: Higher‐Contrast and Lower‐Haze Transparent Screen Using Waving Cholesteric Liquid Crystals

Abstract

We have successfully developed a lowest haze transparent screen which can display higher contrast images than ever, by aligning waving cholesteric liquid crystals. Because the high contrast image is highly visible even in a bright environment, this could change signage and automotive industries.

Brilliant cosmetic film for ambient displays, with cholesteric liquid crystal

“…We found that by changing the surface energy of the substrate, it is possible to control creating a wave alignment of the PCM films, as shown in Fig. (a‐I) . Figure (b) shows photos of PCM films from various directions.…”

“…3(a-I). 6 Figure 3(b) shows photos of PCM films from various directions. The PCM film with wave alignment exhibits diffuse reflection, and the reflected color can be seen from various directions, as shown in Fig.…”

50‐3: Novel Bright Rear‐Projection‐Type Transparent Screen Using Tilted Cholesteric Liquid Crystals

“…We found that waving alignment is essential to realize both reflection light control and to project real image [2], since simple planar orientation cholesteric liquid crystals act as a mirror, which does not project real image.…”

“…Cholesteric liquid crystals perform as a diffraction grating when its spiral axis is tilted [5]. Thus, we aimed to make waving aligned [2] tilted cholesteric liquid crystals film to generate diffraction…”

“…The front type is mainly used for entertainment facilities, such as observation decks and aquariums. We have proposed front-type transparent screens that projects images toward people in the room [1,2].…”