Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Konica-minolta Holdings, Inc.

Konica Minolta Medical and Graphic, Inc.

Hiroshi Kashiwagi

Hideki Takiguchi

Kenji Kumashiro

Narito Goto

Toshifumi Iijima

Syoji Matsuzaka

Noritaka Nakayama

Yoshitaka Yamada

Katsunori Katoh

Satoshi Kawakatsu

Kaoru Shinozaki

Koichi Hatta

Hirofumi Ohtani

Yoriko Nakayama

Tatsuo Tanaka

Shigeru Kojima

Taketoshi Yamada

Nobuaki Kagawa

Norio Miura

Tomoyuki Nakayama

Hiroshi Shimazaki

Fumio Ishii

Takashi Uchida

Haruhiko Masutomi

Shinji Kudo

Kunimasa Hiyama

Noriyasu Kita

Yoshiyuki Nonaka

Hajime Wada

Nobuaki Tsuji

Katsuhiko Heki

Kazuyoshi Ichikawa

Yuji Hotta

Yoshiharu Mochizuki

Akihiko Miyamoto

Shoji Matsuzaka

Naoyo Suzuki

Tetsuya Yoshida

Yusuke Kawahara

Satoshi Matsunaga

Yasuko Matsubara

Keiko Chigusa

H O Socman

Hiroyuki Hashimoto

Toshijumi Iijima

Takeshi Sampei

Hiroko Ohya

Provided is an organic electroluminescence element which is driven with a reduced drive voltage without deteriorating emission luminance and has a high power efficiency. The organic electroluminescence element having at least one light emitting layer is characterized in that two or more types of light emitting dopants having different emission colors are included in at least one light emitting layer, the concentration of all the light emitting dopants included in the light emitting layer is 5 Vol % or more, and the concentration of the light emitting dopant giving a main emission color among the light emitting dopants in the light emitting layer is 2 Vol % or less.

Electroluminescent element

This invention provides a multicolor phosphorescent organic electroluminescent element having an excellent electric power efficiency, a prolonged service life, an excellent storage stability, and an excellent stability of chromaticity against drive current, and a lighting system using the multicolor phosphorescent organic electroluminescent element. The multicolor phosphorescent organic electroluminescent element contains a plurality of phosphorescent dopants different from each other in luminescence wavelength and particularly exhibits white luminescence. Specifically, the multicolor phosphorescent organic electroluminescent element contains two or more phosphorescent dopants different from each other in luminescence wavelength and comprises two or more luminescent layers, the luminescent dopant being a phosphorescent dopant. The multicolor phosphorescent organic electroluminescent element is characterized in that at least one layer formed of luminescent layer A containing two or more phosphorescent dopants different from each other in luminescence wavelength in the same layer is provided, the content of the luminescent dopant having the highest concentration used in the luminescent layer A is not less than 4% by mass and not more than 20% by mass, and luminescent layer B having a maximum luminescence wavelength of not more than 480 nm is provided at a position near the cathode side as compared with the luminescent layer A.

Multicolor phosphorescent organic electroluminescent element and lighting system

A silver salt photothermographic dry imaging material including non-photosensitive aliphatic carboxylic acid silver salts; a photosensitive emulsion containing photosensitive silver halide grains; a silver ion reducing agent; a binder; and a cyan coloring leuco dye. A percentage of the photosensitive silver halide grains having a mean particle size of 0.01 or more &#x3bc;m and 0.04 &#x3bc;m or less is 5% or more by mass and 50% or less by mass of total photosensitive silver halide grains by conversion into a silver amount.

Silver salt photothermographic dry imaging material, image recording method and image forming method for the same

A photothermographic imaging material including a support; an image forming layer containing an organic silver salt, a photosensitive silver halide, a binder and a silver ion reducing agent, the image forming layer being provided on the support; and a cyan coloring leuco dye. The photosensitive silver halide contains silver halide grains having a mean particle size of 10 to 50 nm, and the silver ion reducing agent is a compound represented by the following Formula (A-3) 

Photothermographic imaging material and method for forming image

A silver salt photothermographic material is disclosed, comprising on a support a light-insensitive silver salt of an aliphatic carboxylic agent, light-sensitive silver halide grains, a reducing agent for silver ions and a binding agent, wherein the silver halide grains are those which are capable being converted from a surface latent image formation type to internal latent image formation type upon thermal development, and the photothermographic material further comprises a dye microcapsule dispersion or a dye compound containing at least two chromophores.

Silver salt photothermographic dry imaging material

A photothermographic imaging material including a support; an image forming layer containing an organic silver salt, a photosensitive silver halide, a binder and a silver ion reducing agent, the image forming layer being provided on the support; and a cyan coloring leuco dye. The photosensitive silver halide contains silver halide grains having a mean particle size of 10 to 50 nm, and the silver ion reducing agent is a compound represented by the following Formula (A-3)

Spectral sensitizing dyes represented by the following formulas (1) to (4) are disclosed; silver halide photographic materials and thermally developable photosensitive materials containing the dyes are also disclosed.

Sensitizing dye and silver halide photographic material

A photothermographic material is disclosed, comprising a light-sensitive silver halide, an organic silver salt, a reducing agent, a thiuronium salt and a binder, wherein the photothermographic material further contains at least one of compounds represented by formulas such as

Photothermographic material

A silver halide photothermographic material is disclosed, comprising a support having thereon a light-sensitive layer and light-insensitive layer, wherein the light-sensitive layer or the light-insensitive layer comprises a heteroatom-containing macrocyclic compound, and the light-sensitive layer comprising a sensitizing dye exhibiting maximum sensitivity at a wavelength of 600 nm or more.

Silver halide photothermographic material

A thermally developable photosensitive material of enhanced sensitivity, reduced variation in sensitivity following pre-exposure storage and improved silver image tone is disclosed, comprising a support having thereon an organic silver salt, a binder, a photosensitive silver halide, an infrared-sensitizing dye and a heteroatom containing macrocyclic compound.

Thermally developable photosensitive material

A silver halide photographic laight-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer provided on the support, wherein at least one of the silver halide emulsion layer and the non-light-sensitive hydrophilic colloid layer contains a compound represented by the following Formula 1, and the silver halide emulsion layer contains tabular silver halide grains having an average aspect ratio of not less than 2.0 account for at least 50 % of total grain projected area of the emulsion, and the tabular grains have an average silver iodide content is not more than 1 mole-%;

Silver halide photographic light-sensitive material

A method for chemically sensitizing a silver halide photographic emulsion with a selenium compound is disclosed. The sensitizing method comprises the steps of

Method for chemically sensitizing silver halide photographic emulsion

A light-sensitive silver halide photographic emulsion is disclosed, wherein at least 70% of the total projected area of silver halide grains are tabular grains having an average aspect ratio of a diameter to a thickness of 2 or more, an average value of the longest distances between two or more parallel twin planes contained in the respective tabular grains is 0.008 .mu.m or more, and a variation coefficient of the longest distances between parallel twin planes is 35% or less, and wherein the silver halide emulsion is spectrally sensitized with a substantially slightly water-soluble sensitizing dye by adding the dye to the emulsion in the form of a dispersion of solid particles dispersed in an aqueous solution substantially free from an organic solvent or surfactant.

Light-sensitive silver halide photographic emulsion, silver halide

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Hino, Japan

Hiroshi Kashiwagi