The Surface treatment of Color Display Tubes (CDT) has many purposes, for example, (1) to prevent the reflection, (2) to improve the contrast, (3) to prevent the electric surface charge up, and (4) to prevent the leakage of the Alternating Electric Field (AEF). Two of the more popular coating method for surface treatment is the spin coating method and the spray coating method, those are "Wet Coating Process", we said. The merit of this is low cost performances. And it is said that CDT treated with this is unable to prevent the leakage of the AEF by itself. Now, we developed the New technology to prevent the leakage of the AEF, using "Wet Coating Process" only, and established the mass production line.

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To display an NTSC signal on a large and bright TV screen, a double field-rate wobbling scan conversion method has been studied from a view point of compatibility with the HD-TV, 3D-TV and PC-TV. Using this new technology, effects of line structure, field flicker, line flicker and line crawling caused by the use of a conventional interlaced scanninng can be reduced. Further, a deterioration of a vertical responce due to indicating the 1000 scanning lines can be avoided.

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We have investigated the emission mechanism of p-type and n/p-type silicon field emitter arrays (FEAs) and we have obtained the model for carrier flows, in which the emission current is limited by the supply of electrons both from the depletion layers near emitter tips and from the inversion layers under the gate electrodes. Based on the model, we have proposed a new current-controllable silicon FEA incorporating a metal-oxide-semiconductor field-effect-transistor structure (MOSFET-structured silicon FEA). The fabricated device exhibits a remarkable stability of emission currents, compared with a conventional n-type silicon FEA.

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A retrospection of research and development of liquid crystal materials in Chisso Corporation, mainly from the very beginning to successful establishing of the business unit. As we started a small liquid crystal team in 1972,well behind other chemical industries, the usual course of R & D, i. e. from research through development to business, did not seem realistic in view of an immediate demand from LCD industries. A brief review of how we managed to develop a business unit in, so to say, an reverse course. It was only after we caught the opportunity at the advent of Twisted Nematics to attain a reasonable position in LC business that we could start substantial research work of materials.

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We have studied a detailed mechanism of LC alignment on a poly (vinyl cinnamate) film. The study shows that there are two driving forces to align LC molecules azimuthally on the film ; one comes from the side chains of PVCi molecules and the other from the backbones. These contributions to align LC compete each other, and it is clarified that the driving force from the side chains is stronger than that from the backbones.

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Recent progress on EL technology is reviewed and prospects are discussed. Several potential color EL device structures have been discussed. Color EL display panels have been developed using the patterned phosphor and the patterned filter structures. A color thin film EL displays has establised a leading position for use in miniature head-mounted display applications. For organic EL devices, significant improvements in efficiency, color and stability have been made. A dot-matrix display has been developed using organic EL devices.

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We fabricated the phosphor layer of TFEL devices using the electron beam evaporation method. The mixture of SrS : Ce and ZnS was used as a source pellet. CeCl_3 and CeN were used as luminescent centers. The composition ratio of the thin films was evaluated by RBS and PIXE. The structure and crystallinity of the thin films were evaluated by SEM and XRD.

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We fabricated an organic EL device utilizing an Alq3 layer doped with Rhodamine 101 perchlorate. We obtained a red emission with the wavelength of 600nm. The red emission mechanism was discussed in the device by examining the exicitation wavelength of Rhodamine 101 perchlorate and the emission wavelength of Alq3,and I-V characteristics.

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