Etsuro Kishi

5.1: Development of In‐Plane EPD

An in-plane electrophoretic display has been developed aiming at a paper-like-display. Prototype displays exhibit a bright and clear appearance just like copies on paper, excellent stability against deformation and memory behavior. Essential characteristics for passive matrix addressing based on a control electrode system are achieved in structural or electric barrier type implementations.

Switching and memory phenomena in Langmuir–Blodgett films with scanning tunneling microscope

The current‐voltage characteristic has been measured for a probe/Langmuir–Blodgett (LB) film/metal structure with the scanning tunneling microscope (STM). The rapid increase of current and substantial increase in conductance have been found when a critical positive voltage was applied to the probe. A bright spot in the STM image has been observed at the position where the increase in the conductance occurred. The changes in the STM images are attributed to the change in the conductance of LB films themselves rather than the surface topography, and may be associated with the switching phenomena in LB films.

LP-12: Late-News Poster: Color In-plane EPD Using an Anisotropic Scattering Layer

This paper describes the first research prototype of color in-plane electrophoretic display. Characteristic of optical performance is improved by incorporating an anisotropic scattering layer instead of an isotropic scattering layer. The reflectance of a white state is 35% at an illumination angle of 30° and a detector angle of 0° to the surface normal. The color coordinate does not change very much differently from the reflective LCD while changing an illumination angle from 70° to 30°.

Barrier-height imaging of fatty acid Langmuir-Blodgett films

Abstract Behenic acid Langmuir-Blodgett films on graphite have been investigated by STM using the AC gap-modulation technique. Two significant differences were observed as compared to conventional topographic images. (1) The periodic contrast variation, which is superimposed on the structure of the behenic acid molecules in the lamellar arrangement, is greatly enhanced. This period corresponds to the width of 6 molecules. (2) The carboxyl groups appear featureless and cannot be distinguished, whereas in the topographic images they are the brightest signal and are clearly distinguished. The periodic variation of enhanced contrast corresponds to that of the positional relation between the adsorbed molecules and the underlying substrate. This means that the additional information of the interaction between the adsorbed molecules and the substrate can be obtained by the gap-modulation mode in STM.

Parallel arrangement of fatty acid molecules in films deposited at a lower surface pressure

Abstract It is widely believed that Langmuir-Blodgett films deposited at a lower surface pressure, i.e. in a rather expanded phase, have a disordered structure. Using a scanning tunneling microscope, however, we have found, unexpectedly, ordered structures in fatty acid films deposited at lower surface pressures onto single-crystal substrates such as highly oriented pyrolytic graphite and molybdenum disulfide, where the molecules adhere with their long axes parallel to the substrate surface.

LP‐6: Late‐News Poster: In‐Plane EPD with an Embedded Collecting Electrode in a Spacer

We reported improved performance of a new in-plane structure. The characteristics of driving voltage, response time and shield effect of electric field cross-talk are dramatically improved by introducing a collecting electrode embedded in the spacer that surrounds each pixel. A test cell exhibits excellent performance of switching with total duration time of 280 ms at 10 V and reproduced a gray scale in 260 dpi image by shielding the cross-talk.