Light control film

Jeon Young Jae, Lee Gae Hwang, Jang Jae Eun, et al. Applications of multidirectional reflective light-control films on reflective polymer-dispersed liquid crystal displays for enhancement in image quality at lower viewing angles. Liq. Cryst. 39 no. 11 (2012) 1314-1319. 

Light control film 7 Activated liquid crystal... 

Liquid crystal display 4 Light control film... 

N.A. Vaz, G.W. Smith, G.P. Montgomery Jr., A light control film composed of liquid crystal droplets dispersed In a UV-curable polymer. Mol. Cryst. Liq. Cryst. 146, 1-15 (1987)... 

This polymer film is a novel light control film which scatters only incident lights from particular angles and transmits incident lights from all other angles. This unique light control function is caused by the microstructure in the polymer film. 

A large number of organic and inorganic materials which exhibit photochromism have been known for many years. Such materials have been applied in many areas of technology to use them as dosimeter materials, light control filters, recording films in photography and decorative paints. 

The preparation methods and the novel permselective characteristics of (polymer/LC) composite films have been extensively studied (1-3). Also, various types of (polymer/LC) composite systems have been reported as large area and flexible light-intensity controllable films (4-11). Since thermotropic liquid crystalline polymers (LCPs) with mesogenic side chain groups exhibit both inherent mesomorphic properties of LC and excellent mechanical characteristics of polymeric materials, LCPs... 

Figure 14. Scattered light transmissive mode display with light control (display) film.

Lightly metallized polyester films are placed over windows to help reduce the sunlight passing through the window. Most of these solar radiation control films are coated with a PSA for attachment. 

The novel light control function of LCF is determined by the microstructure in this polymer film. 

LCF has the microstructure having the refractive index modulation in the film. Optical microphotographs of the cross section view as well as the plane view of LCF is revealed in Fig.2. The alternating dark and bright lines like as Venetian blind represents the refractive index modulation. In this case, when LCF is rotated around Y axis, an angle dependent light control property is apparently observed. In the case of front translucent type, the microstructure is parallel to the vertical direction of the film surface. 

Phospholipid molecules form bilayer films or membranes about 5 nm in thickness as illustrated in Fig. XV-10. Vesicles or liposomes are closed bilayer shells in the 100-1000-nm size range formed on sonication of bilayer forming amphiphiles. Vesicles find use as controlled release and delivery vehicles in cosmetic lotions, agrochemicals, and, potentially, drugs. The advances in cryoelec-tron microscopy (see Section VIII-2A) in recent years have aided their characterization [70-72]. Additional light and x-ray scattering measurements reveal bilayer thickness and phase transitions [70, 71]. Differential thermal analysis... 

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