Shigeo Shimizu

The spectroscopic behaviour of J-aggregates of cyanine dyes without long chains incorporated in the monolayer assemblies☆

Abstract Cyanine dyes without long alkyl chains can be incorporated into composite monolayers with stearic acid at the air-water interface. In the composite monolayer of a 1:1 mixture of dye I (5,5′-dichloro-3,3′,9-triethylthiacarbocyanine chloride) and stearic acid on the water surface, two J-bands were observed, depending on the surface pressure. In the case of dye II (5,5′-dichloro-3,3′-diethyl-9-phehylthiacarbocyanine chloride) the J-aggregate was more stable than those of dye I. The composite monolayers including the dyes can be transferred onto a solid support, retaining the J-aggregate between stearic acid layers. When the temperature was raised above 55°C, the J-band decreased very rapidly with a simultaneous increase in dimer and monomer bands. These spectral changes can be repeated with good reversibility. The correlation between the absorption spectra and the formation of J-aggregates for dyes I and II is discussed.

6.4: Invited Paper: Fully Digital D-ILA™ Device for Consumer Applications

has developed a fully digital driving D-ILA device, which inherits the advantages of conventional D-ILA such as contrast ratio greater than 5000:1, high efficiency, high resolution and high reliability. The all-digital drive offers substantial reductions in system cost and excellent picture quality has been achieved.

Fully digital LCoS device for consumer applications

— This paper presents a new display device, which combines a digital backplane and a vertically aligned nematic liquid-crystal layer. The device has 1280 × 720 pixels in a 0.7-in.-diagonal display area. In this paper, we present the concept of the new device and overview the performance of the device for a rear-projection television application.