J. of IEIJ Vol.86, No.3

The Abstracts of the Papers
J.Illum. Engng. Inst. Jpn. Vol. 86, 2002

Fabrication of Far Infrared Rays Radiation Bodyand Consideration of the Heat Retention on Human in Comparison with Other Properties
Haruo TAGUCHI, Kazutaka MITOBE and Noboru YOSHIMURA

 The purpose of this study is to examine the effect of Far Infrared Rays radiation body. Natural Zeolite was reported as having excellent characteristics for manufacturing FIR radiation body. So we manufactured FIR radiation body using the following procedureÅFwe used the burned powder of natural zeolite and a heat resistant binding agent to produce FIR paintÅGand then we applied the FIR paint to an aluminum plate. The FIR radiation body did not shed from the aluminum plate, and it had a high emission rate of greater than 80% at a wavelength of 5 to 25 micrometers. In addition, to investigate the difference of heat retention of the human body, we compared the temperature distribution of a FIR radiation heater, a thermal conduction heater, and a convection heater when applied to a human hand.

KEYWORDS : Far Infrared Rays radiation, human body, heat retention, natural zeolite

Ignition Performance of Inductively Coupled Electrodeless Metal Halide Lamps
Kozo UEMURA, Toshihiko ISHIGAMI, Ichiro YOKOZEKI, Masahiko KAMATA and Keiichi SHIMIZU

The starting property of inductively coupled electrodeless metal halide lamps was evaluated and analyzed. The effects of the lamp parameters and of the circuit parameters on the starting property were investigated. Method was established for measuring the starting property that uses two - independent RF power supplies, one for the break down circuit and one for the induction - coil circuit.
  The evaluated lamp parameters were type and pressure of filled rare gas, gaps between arc tubes and induction coil, voltage applied to starting-aid discharge tube, and waveform of voltage applied on starting - ]aid discharge tube. Additionally, the effects of the free iodine gas and the time to become ready for restart were evaluated.
  The evaluated circuit parameters were, the phase difference between the voltage applied on the starting - aid discharge tube and the induction - coil terminal voltage, and the waveforms (flat and ripple outline, RF modulated) of the induction coil voltage.

KEYWORDS : electrodeless, starting property, lamp parameters, circuit parameters, starting property measurement

Emission Characteristics of Rare Gas Fluorescent Lamps with Inner and Outer Electrodes
Hidehiko Noguchi, Hidetoshi Yano, Hideki Motomura and Masaharu Aono

 A small diameter xenon fluorescent lamp that is suitable for LCD backlighting has been developed. It consists of one inner electrode and one outer electrode. A pulsed current flows when a rectangular wave voltage is applied between these electrodes.
  The positive column is diffused at lower operating frequency and lower wattage, and is contracted at higher operating frequency and higher wattage. When the positive column is diffused, the light output becomes stable and the VUV radiation and phosphor emission become stronger. The luminous efficiency of this lamp was about 60% of that of a conventional Hg - type cold cathode fluorescent lamp.

KEYWORDS : xenon fluorescent lamp, mercury free lamp, diffused positive column, contracted positive column

R, G, and B Default Values Calculated for a Desired Color Using Approximate Formula
Naoyoshi Nameda and Takashi Nakagawa

KEYWORDSÅFcolor, liquid crystal display, color coordinates, computer

Evaluation of Light Output Properties of White LEDs Accumulated Light Sources and the Verification of their Heat Radiation Effects by Thermal Fluid Simulation Analysis
Kenichi YAMADA, Yasuo IMAI and Kenichi ISHII

KEYWORDSÅFwhite LED, InGaN, light output, heat radiation, thermal fluid analysis