Brother Kogyo Kabushiki-kaisha

Aiphone Co., Ltd.

Hiroshi Sumiya

Ryohei Komiya

Yoshiyuki Ban

Tatsuru Shinozaki

Sunao Kawai

Hiroyuki Sasaki

Kousuke Fukaya

Kiyoji Muramatsu

Fumihiro Sunda

Kengo Nakata

Mayumi Ishikawa

Toshitaka Iwata

A television intercom system need not prepare two kinds of electric power source adaptors even when it is equipped with an expanded monitor master station, and need not either use an electric power source adaptor having a large capacity. In the television intercom system, a picture bus controller supplies electric power sources to a camera-equipped entrance substation, a monitor master station and an expanded monitor master station, and a picture picked up by the camera-equipped entrance substation is displayed on the monitor master station and the expanded monitor master station. The picture bus controller includes an electric power source expansion sub-adaptor that is the same as an electric power source main adaptor used before expansion when the expanded monitor master station is added, an electric power source detection circuit for detecting the electric power source expansion sub-adaptor, and an electric power source switching circuit for dividedly supplying the electric power source from the electric power source main adaptor used before expansion and from the electric power source expansion sub-adaptor to the picture bus controller, the camera-equipped entrance substation, the monitor master station and the expanded monitor master station.

Television intercom system

The invention makes it possible to call a resident of collective housing even when the apartment number of the resident is unknown. A collective housing entrance substation is connected to residential master stations through a controller, and a name retrieval module is connected to the controller. The name retrieval module has a memory in which a name and/or apartment number of a resident is registered in advance, a button operable to display the name and/or apartment number of the resident registered in advance, a name indicator for display of the name and/or apartment number of the resident registered in advance, and a call button that is operated with display of the proper name and/or apartment number to call the residential master station of the resident.

Collective housing intercom apparatus

An intercom system for a building or apartment house includes at least one main entrance station which is installed at an entrance or the like of a building or an apartment house, a plurality of residential master stations which are respectively installed inside a plurality of residences in the building or apartment house for receiving calls and talking with the main entrance station , a common line which connects the main entrance station and respective residential master stations in parallel, a line power supply which supplies direct current power, for example, DC 24 V to the main entrance station and respective residential master stations through the common line , an electronic door lock which is connected to the main entrance station for locking and releasing an entrance door of a main entrance, and a plurality of call switches connected to respective residential master stations and mounted on front doors of respective residences for operation by a visitor. A series resistance and capacitance forming a frequency response leveling circuit is connected across a choke circuit in the line power supply to eliminate frequency dependent impedance differences found to interfere with feedback cancellation and howling control.

Intercom system for a building or apartment house

A multicolor printing device that synthesizes a substitute color by mixing color materials to perform a printing operation with no interruption due to the reduction of the specific color material. The device judges whether the specific color material remains. If no black color material remains, the device judges whether the substitute color is to be produced. If the production of the substitute color is set, density information of the black color material is converted to density information of the three colors. Furthermore, if the residual quantity of the specific color material is below a predetermined value and if the production of the substitute color is set, density conversion of the color materials is likewise performed.

Multicolor printing device

A printing control apparatus having a semiconductor storage device of a reduced capacity allows an inexpensive printer to provide large-sized, high-resolution and high-quality printout. The apparatus comprises a band buffer and a page buffer. The band buffer formed in a semiconductor storage device develops therein part of print bit image data. The page memory formed in an external storage device stores one page of print bit image data. With incoming print bit image data developed in the band buffer, the developed print bit image data are transferred from the band buffer to the page memory for printout.

Printing control apparatus

A print control apparatus for use with a printer for forming a print output based on command data generated by a computer. The print control apparatus includes a line segment data conversion unit for converting computer-generated command data to successive pieces of line segment data each having a position and a length in a raster direction, and a raster image data conversion unit for converting the line segment data to raster image data based on which printing is performed by the printer.

Print control apparatus

An image forming apparatus for irradiating an image light on a photosensitive recording medium having at least one photosensitive wavelength range on the basis of an image information to thereby form an image on the photosensitive recording medium, comprising a semiconductor laser for emitting an image light or a thermal cathode for emitting thermoelectrons having the image information, a photomultiplier or microchannel plate for converting the image light or the thermoelectrons into secondary electrons while the image forming information is kept, and multiplying the secondary electrons, and a fluorescent screen for converting the multiplied secondary electrons into an intensified image light. The intensified image light may be supplied on a photosensitive recording medium while the image forming information is kept, thereby forming an image on the photosensitive recording medium.

Growing community of inventors

Nagoya, Japan

Hiroshi Sumiya