Canon Kabushiki Kaisha

Dena Co., Ltd.

Mayumi Yamamoto

Tsuyoshi Eida

Takao Yamamoto

Yoshihisa Takizawa

Shinichi Sato

Mikio Sanada

Atsushi Inoue

Eriko Saito

Yoshifumi Hattori

Akira Nagashima

Makoto Aoki

Akira Suga

Shinichi Tochihara

Ryuji Katsuragi

Kazuyuki Matoba

Hiromitsu Hirabayashi

Jiro Moriyama

Yutaka Kurabayashi

Toshiharu Inui

Fumihiro Gotoh

Yoshitaka Watanabe

Keiichi Murai

Hideto Yokoi

Kumiko Mafune

Eiichi Suzuki

Akihiko Shiraishi

Hisashi Teraoka

Noribumi Koitabashi

Hideaki Kawamura

Hitoshi Sugimoto

Shigeyasu Nagoshi

Takahiro Mori

Miyuki Matsubara

Katsuhiro Shirota

Katsuhiko Takahashi

Masaya Uetsuki

Miyuki Fujita

Shinya Mishina

Masashi Ogasawara

Hideo Takiguchi

Jun Kawai

Koichi Tanno

Hisao Yaegashi

Shigeo Toganoh

Keiichi Ikeda

Masaya Uetuki

Yoshiyuki Mizoguchi

Osamu Nishiwaki

Masahiko Tonogaki

Masaya Kikuta

Toshiaki Kimura

Takayuki Fujita

Eriko Ono

Ikumasa Ikeda

Ichito Nagata

Tomo Tsubota

Tetsurou Inoue

Mamoru Yamashiki

Moe Matsue

Reiko Yanagiba

Since only users registered in a chatting service are subject of friends on the chatting service, unregistered users cannot become friends. A server apparatus controls a message exchanged between registered users who are registered in a chatting service, and controls a message exchanged between a registered user and an unregistered user. Also, the server apparatus manages a friend list of the registered user, and recommends other user to be added to the friend list with respect to the registered user. Also, the server apparatus determines other user to be recommended to the registered user by using a predetermined condition set according to the presence or absence of registration in the chatting service.

Server device for exchanging messages

Image forming process employing liquid composition and ink in combination

A method of forming a black image on a recording member includes the steps of providing each of a black ink having a first penetration rate and at least one color ink having a second penetration rate different from the first penetration rate, applying the at least one color ink to the recording member, and applying the black ink to the recording member after the at least one color ink has been absorbed into the recording member is disclosed. An ink-jet recording apparatus is also disclosed.

Apparatus and method for forming a black image in which black ink is overlaid on color ink

The invention provides an ink comprising a coloring material, a solvent for dissolving or dispersing the coloring material, and an amphoteric polymer having both anionic and cationic groups. The invention also provides an ink-jet recording process and apparatus using such an ink.

Ink, ink-jet recording process and apparatus using the same

When a black image region is printed, the overall pixels in the region is printed by a black ink. Then, a cation type cyan ink which makes a coloring agent in the ink insoluble is printed on the pixels of a predetermined pattern. By this, the dye of the black ink is maintained near the surface of the printing medium to increase density of the black image. At the same time, for preventing variation of tone of the black image, the pixels of the predetermined pattern are printed by a yellow ink.

Method and apparatus for ink-jet printing

Provided is an ink-jet recording process for forming a color image on a recording medium using a liquid formulation and a color ink in combination, wherein the liquid formulation contains a cationic polymer having a weight-average molecular weight in the range of from 400 to 1,400, and the liquid formulation and the ink are each ejected from a recording head having an ink ejection volume per dot of from 2 to 25 picolitters.

Ink-jet recording process using liquid formulation and ink in combination

There are provided a color image forming method with liquids, capable of ensuring sharpness and high density in basically all the color images, and a recording apparatus therefor. This invention employs a black ink of relatively superior diffusibility and color inks of relatively superior penetrability, different in color from the black ink, and is characterized by forming the boundary area of a black image area with the color inks instead of the black ink.

Ink-jet recording method employing inks of different characteristics and

An ink set having (i) a black ink having a surface tension of not less than 40 dyne/cm, the black ink including a first dye; and (ii) at least one color ink having a surface tension of not more than 40 dyne/cm, the at least one color ink including a second dye which is rendered insoluble by the first dye when the black ink and the at least one color ink are mixed.

Ink set recording apparatus and method using ink set having a dye that

Disclosed herein is an ink set comprising in combination at least two inks of different colors, wherein at least one ink comprises a cationic dye and an amphoteric compound, and another ink of a color different from said one ink comprises an anionic dye and a water-soluble anionic polymer or nonionic polymer in addition to the dye.

Ink set and ink-jet recording method using the same

Disclosed herein is a yellow ink comprising at least two yellow dyes and a liquid medium dissolving or dispersing the dyes therein, wherein the ink comprises a dye represented by the following general formula (1) in the state of a free acid, and a yellow dye having a SO.sub.3 H group as a main solubilizing group in the state of a free acid and having its position in the L*a*b* chromaticity diagram at b*=xa* (3.ltoreq.x.ltoreq..infin.): ##STR1##

Ink, and ink-jet recording method and instruments using the same

A solid state image pickup apparatus for obtaining a luminance signal from the average value of outputs of two or more pixels varying in spectral characteristic from line to line. It includes a circuit to correct the amplitude of a luminance signal in every other line such that the amplitude of the luminance signal in each line is constant in a uniform luminance face image pickup state. The circuit may automatically switch the amplitude of the luminance signal in accordance with a change in the color temperature.

Solid state image pickup apparatus having improved luminance control

Disclosed is a color signal processing apparatus in which at least three types of color signals corresponding to filters are received from a solid-state image pickup element on which at least three types of color filters are formed, and linear matrix conversion of the at least three types of color signals determined by spectral characteristics of the corresponding color filters is performed to generate R, G, and B signals.

Color signal processing apparatus using plural luminance signals

Disclosed herein is an ink-jet ink comprising in combination at least one compound selected from nitrogen compounds consisting of secondary amines and derivatives thereof, tertiary amines and derivative thereof, and complexes thereof and having at least one group selected from the group consisting of alkyl groups, a carboxyl group and the salts thereof, and a sulfonic group and the salts thereof, and a cyclic phosphate in a liquid medium in which a dye is dissolved or dispersed.

Ink-jet ink

An image signal processor for correcting a difference in level between luminance signals in horizontal scanning lines using a control signal generated in accordance with a color signal, wherein the color signals are two color difference signals (R-Y) and (B-Y), and wherein the control signal includes a linear combination of the two color difference signals (R-Y) and (B-Y).

Disclosed herein is an ink comprising a dye having at least one anionic group, an amino acid type polyamine or a polyethyleneimine containing at least 7 nitrogen atoms in its molecule, and water, wherein the dye is either a metallized azo dye or a nonmetallized azo dye satisfying the following conditions (x) and (y) at the same time:

Ink, and ink-jet recording method and instrument using the same

Growing community of inventors

Tokyo, Japan

Mayumi Yamamoto