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The development of a Microsoft® Excel® spreadsheet is described, for the accurate calculation of CIE (Commission Internationale de l’Eclairage) 1931 xy chromaticity coordinates and luminance data from visible region absorption spectra recorded in transmission mode. Using firmly established CIE principles, absorbance-wavelength data from visible spectra recorded using a Hewlett Packard 8452A diode...
In order to improve performance of Organic Light-emitting Diodes (OLEDs) in this paper, the electron injection is enhanced by inserting an ultrathin Alq 3 –LiF–Al trilayer in between the organic layer and the LiF/Al cathode, which is explained by the formation of a thin n-doped Alq 3 layer that improves electron injection. At the same time, a buffer layer using MoO 3 was induced...
Packaging plays a role of protecting the product, attracting consumers’ attention, and communicating the product’s contents. Logo typography is the most important written information of packaging. Among the packaging forms of commodities in the market, cylindrical packaging is in the majority. In the condition that the commodities are highly homogenous, packaging design has become an important factor...
The intent of this study is to determine the minimum ambient illumination requirement for legible electronic-paper display. Not only the young but also the elderly were included as research subjects. Through the method of character-search task, the results indicated that the significant performance improvement of all subjects occurred at 52lux on the search time and at 62lux on the subjective visual...
This study investigated the effects of light source, ambient illuminance, character size, and interline spacing on visual performance and visual fatigue in using commercial electronic paper displays. Regarding visual performance the results showed that display type, character size, interline spacing had significant effects on search time. Electrophoretic electronic ink display had a shorter search...
An improved method for visual gamma correction is developed for LCD displays to increase the accuracy of digital colour reproduction. Rather than utilising a photometric measurement device, we use observers’ visual luminance judgements for gamma correction. Eight half tone patterns were designed to generate relative luminances from 1/9 to 8/9 for each colour channel. A psychophysical experiment was...
Using a blue iridium complex phosphorescent dye of bis[(4,6-diflourophenyl)-pyridinato-N,C 2 ′)](picolinato) iridium(III) (FIrpic) and a yellow iridium complex phosphorescent dye of bis[2-(4-tertbutylphenyl)benzothiazolato-N,C 2, ]iridium (acetylacetonate) [(t-bt) 2 Ir(acac)] as dual ultrathin layers, nondoped white organic light-emitting diodes (WOLEDs) were fabricated. By...
This study explored the relationships between automobile head-up display (HUD) presentation image designs and drivers’ Kansei, using quantitative and qualitative analysis. There were two major stages in this study. The objective of the first stage was to find representative Kansei factors from a large semantic space, using factor analysis and cluster analysis. In the second stage, a prediction model...
We introduce a method to enhance the luminescence of GaN-based LEDs by combining the direct heteroepitaxy laterally overgrowth (DHELO) technique with selective wet etching process. The epitaxial overgrowth of GaN layers on sapphire substrate with SiO 2 micro-rods array exhibited a reduced dislocation density and improved the crystal quality. The EL intensity of LEDs with SiO 2 micro-rods...
One of the challenges today in human–computer interaction is to design systems that are not only usable but also appealing to users. In order to contribute to meet this challenge, our general objective in the present study was to enhance current understanding of the perceptual features that favour users’ interactions with Websites. This is a particularly important issue, as users’ first impressions...
A novel red organic electroluminescent diode based on an ultrathin 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) layer has been fabricated. The device with the ultrathin DCJTB layer inserted between N, N′-bis-(1-naphthyl)-N, N′-diphenyl-1,1′-biph-enyl-4,4′- diamine (NPB) and tri-(8-hydroxyquinoline) aluminum (Alq 3 ) layers has an emission from both...
Thin-film-transistor liquid crystal displays (TFT-LCDs) are the most popular flat panel displays now. Polarizer film is one of the most important components in the TFT-LCDs, which is a multi-layered complex film developed by the technology of stretching film with dichroic materials. In this paper, a systematic review about polarizer film used for TFT-LCDs is given. Structure, property, function and...
Completely Automatic Public Turing test to tell Computers and Humans Apart, or CAPTCHA, is a security measure that guards a system from exploitation by the discrimination between a real human being and an automated computer program via the method of presenting to the unknown user the challenges that are hard for computer yet easy for human. Focusing on text-based CAPTCHA, this study conducted an experiment...
In this paper, a novel visual secret sharing scheme is presented to hide a secret image into two meaningful cover images which are called share images with no pixel expansion. Simultaneously, the proposed scheme embeds an extra confidential image in these two share images. People who gather the two share images can obtain the secret image by stacking them without any complex computation. After one...
In order to provide suitable design guidelines for TV programme designers setting Chinese horizontal/vertical leading displays, two stages are involved in this study. The purpose of the first stage was to investigate the current situation of using horizontal/vertical leading displays on LCD TVs news channels. The purpose of the second stage was to examine the effects of horizontal/vertical leading...
In this paper, six organic light emitting devices with different quantum well cycles and different position of well structures have been demonstrated. These well structures were composed by N,N′-diphenyl-N,N′-bis(1-napthyl)-1,1′-biphenyl-4,4′-diamine and tris-(8-hydroxyquinoline) aluminum, or tris-(8-hydroxyquinoline) aluminum and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline. The device with one...
The performance of organic light-emitting diodes (OLED), based on NPB/Alq 3 /KCl/Alq 3 active regions, with various anode (i.e. ITO and ITO/MoO 3 ) and cathode (i.e. Al and LiF/Al) structures is compared. NPB, Alq 3 , KCl, ITO, MoO 3 , Al and LiF are N,N′-bis-(1-naphthl)-diphenyl-1,1′-biphenyl-4,4′-diamine, tris (8-hydroxyquinoline) aluminum, potassium chloride,...
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