Photo-patterned phase retarders

Photo-patterned Phase Retarders and Color Filters... 

Figure 5.15 Multifunctional polarizer (upper), comprising a linear polarizer (1) and a photo-patterned phase retarder (2), and its image (lower) in crossed polarizers [17, 18]. UV-irradiated (He-Cd laser, X = 325 nm) PVCN film (2), used for the photo-patterned phase retarder has a thickness of 10-40 xm. The variation of the optical axis of the phase retarder (3, 4) was done by changing the direction of the polarization of the activated UV illumination. Reproduced from [17, 18], Institute of Physics Publishing, Bristol and Philadelphia, 201-244 (2003)...

Figure 5.18 shows one of the configurations of TN-LCD, which makes it possible to obtain birefringent colours, using a photo-patterned phase retarder [18]. 

Photo-patterned non-absorbing and bright interference color filters, as well as positive and negative phase retarders based on photoaligning technology, are presented in [22], The stack of three TN-LCDs, accompanied by yellow, magenta and cyan photo-patterned phase retarders respectively in a front and back surface, can create... 

A new impetus in the application of photosensitive media appeared when PVCN was discovered as an LC photoaligning substance [19]. The concept for the design of a photo-patternable hybrid linear photo-polymerizable (HLPP) configuration was proposed by Schadt et al. (Figure 5.17) [20, 21]. The HLPP layers include a linearly photo-polymerized polymer (LPP) as the aligning layer and an LPP-LCP phase retarder in one compact implementation (Figure 5.17). 

Figure 5.18 New possibility to obtain a color TN- or STN-LCD, using a photo-patterned retarder [18], Upper basic red, green, and blue colors obtained by the corresponding properly adjusted phase retarders (PRl, PR2, and PR3). Lower one of the possible configurations with TN-LCD, three polarizers (PiUPsjUPs, and double phase retarder (DPR) configuration comprising two phase retarders PRl and PR2, placed at symmetrical angles a with respect to the input (output) polarizer P1HP3. Reproduced from [18], Institute of Physics Publishing, Bristol and Philadelphia, 201-244 (2003)...

Transflective LCD ifh Photo-patterned Polarizers and Phase Retarders... 

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