Sharp Kabushiki Kaisha Corporation

Tokyo Ohka Kogyo Co., Ltd.

Junichi Washo

Kenji Ohta

Takatsugu Obata

Akira Takahashi

Junji Hirokane

Hiroyuki Katayama

Michinobu Mieda

Toshihisa Deguchi

Tetsuya Inui

Shigeo Terashima

Tomoyuki Miyake

Satoshi Katayama

Kazuo Van

Kotaro Fukushima

Takao Hyuga

Masahiro Horii

Mami Adachi

Kohichi Toriyama

Akira Hashimoto

Muneo Nakayama

Akihiro Kondoh

Hisayuki Utsumi

Toshihiro Nishimura

Kazuya Ishida

Mitsuo Ishii

Takaaki Miyazaki

A coating liquid for an undercoat layer of an electrophotographic photoreceptor which is formed by sequentially stacking the undercoat layer and a photosensitive layer on an electrically conductive support, wherein the coating liquid comprises titanium oxide microparticles and silicon nitride microparticles as an inorganic compound, a binder resin and an organic solvent.

Electrophotographic photoreceptor, coating liquid for undercoat layer of electrophotographic photoreceptor, and method for producing the same

A method of forming an electrophotographic photoreceptor capable of forming a smooth coating film free of pinholes, bubbles, surface unevenness, etc. in a short time as a coating film for forming a photosensitive layer is provided. The method includes heating and drying a coating film formed by coating a coating solution containing ingredients of the photosensitive layer and a solvent medium containing 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7 represented by the following formula (1) in an air stream at a temperature of 50&#xb0; C. or higher and 130&#xb0; C. or lower supplied from a blowing nozzle, by a far infrared ray heating method and an induction heating method, by using, for example, a drying apparatus, thereby manufacturing the electrophotographic photoreceptor:(relative evaporation rate)=(time for evaporating n-butyl acetate)/(time for evaporating solvent)&#x2003;&#x2003;(1).

Method of forming electrophotographic photoreceptor and method of drying coating film

A coating liquid to be used for coating has a loss tangent tan &#x3b4; of from 1 to 10 at a frequency of 6.28 radians/sec. A coating liquid supplying roll has a fine concave portion in at least a part of the circumferential length thereof, and in the vicinities of the both circumferential ends of the fine concave portion, the fine concave portionhas concave depth decreasing portions formed in such a manner that the depth of a fine concave decreases. The fine concave portion is constructed in such a manner that the sum L (=L+L) of a circumferential length Lof a portion in which the fine concaves are formed in substantially the same depth and a circumferential length Lof one concave depth decreasing portion becomes an integral multiple (1 or more) of a circumference Lc of the cylindrical substrate.

Apparatus and method for applying coating liquid to cylindrical substrate, and electrophotographic photoreceptor produced by that method and electrophotographic apparatus provided with the same

To suppress generation of a joint when detaching an applicator roll and cylindrical substrate from each other in a simple control to form a coating film having a uniform thickness efficiently on the cylindrical substrate is provided. A coating liquid is supplied from a pan to an applicator roll via a metalling roll, the applicator roll supplied with the coating liquid and a cylindrical substrate provided so as to be close to or in contact with the applicator roll are rotated. The coating liquid is transferred from the applicator roll to the cylindrical substrate, and the cylindrical substrate is rotated in a predetermined number. Thereafter, such control is carried out that the circumferential speed Vof one of the applicator roll and the cylindrical substrate is higher than the circumferential speed Vof the other when detaching the applicator roll and the cylindrical substrate from each other.

Method and apparatus for applying coating liquid to cylindrical substrate and method for producing electrophotographic photoreceptor and electrophotographic photoreceptor produced by the production method

A photo-mask and a method of manufacturing a photo-mask, which includes the steps of applying a resist film onto a substrate of quartz, glass and the like, subjecting the resist film to light exposure and development to form a fine resist pattern, etching the mask substrate covered by the fine resist pattern, causing a non-light transmitting thin film of Cr, Ta, etc. to adhere thereon by vapor deposition, sputtering and the like, and removing the thin film on the resist pattern together with the resist film, thereby to form the photo-mask.

Method of manufacturing photo-mask and photo-mask manufactured thereby

A magneto-optical record/reproduce apparatus utilizes a magneto-optical record medium having a surface on which a record area and a non-record area are defined, the non-record area having a lower friction than that of the record area. The apparatus includes a record/read head disposed in the vicinity of the surface of the magneto-optical record medium, the record/read head being moved away from the magneto-optical record medium during a running state of the magneto-optical record medium for recording or reading information, the record/read head being in contact with the magneto-optical record medium during a stop state of the magneto-optical record medium after terminating the recording or reading of the information, a termination detect section for detecting a termination of the recording/reading of the information related to the magneto-optical record medium, and for outputting a termination detect signal, and a move device for moving the record/read head to a position facing the non-record area based on the termination detect signal from the termination detect section.

Magneto-optical record medium having record/non-record areas and a

A cartridge case for containing a disk-shaped recording medium has a shutter attached slidably thereon. The shutter is U-shaped sectionally and the edge sections where the shutter contacts the surface of the cartridge case are rounded so that friction therebetween is reduced when the shutter slides on the surface of the cartridge case. The cartridge case is provided with a notch and an indentation on at least one of its side surfaces corresponding to protruding pieces in the device into which the cartridge case is inserted such that a sensor in the device can be activated only when a cartridge case compatible with the device is inserted and these protruding pieces properly engage with the notch and the indentation on the cartridge case.

Cartridge case

A photo-mask and a method of manufacturing a photo-mask, which includes the steps of applying a resist film onto a substrate of quartz, glass and the like, subjecting the resist film to light exposure and development to form a fine resist pattern, etching the mask substrate covered by the fine resist pattern causing a non-light transmitting thin film of Cr, Ta, etc. to adhere thereon by vapor deposition, sputtering and the like, and removing the thin film on the resist pattern together with the resist film, thereby to form the photo-mask.

An electroluminescent (EL) display panel comprising a flexible substrate film for supporting an EL display unit, a lead electrode provided on an extended portion of the flexible substrate film, the lead electrode leading out of the EL display unit, an adhesive provided on the lead electrode formed on the flexible substrate film, and a wiring board for carrying a driving circuit for the EL display unit, the wiring board being connected to the EL display unit by the adhesive. The EL display unit is a thin-film type or a powder type.

Connector for electroluminescent display panel

A disc clamping device comprises a disc base on which to set a disc and which has a spindle for rotating the disc, and a disc holding member movable in the axial direction of the spindle. The disc holding member comprises a portion for pressing a disc with a centering hub and a portion to be engaged with the center hole of a disc with no centering hub.

Disc clamping device

A combined display panel comprises a liquid crystal display (LCD) and an electroluminescent display (EL). In addition to the conventional emitting agents, an electroluminescent layer of the EL contains a pigment element for reflecting radiation toward the LCD. Preferably, the LCD is a guest-host type and the EL is a powder type. The material of the pigment element may be selected from a white pigment including barium titanate and titanium oxide. A semi-transparent film such as a parchment paper may be inserted between the LCD and the EL.

Combined display panel of liquid crystal display and electroluminescent

An electrochromic display device comprising a transparent substrate and a counter substrate sealingly joined together to define a cell for accommodating an electrolyte, a transparent electroconductive layer on an inner surface of the transparent substrate, a display electrode layer overlaying the transparent electroconductive layer and a counter electrode layer deposited on an inner surface of the counter substrate is featured by the provision of a transparent insulating layer between the transparent substrate and the transparent electroconductive layer.

Electrochromic display device

An electrochromic display cell comprises two opposing glass substrates, transparent electrodes formed on the glass substrates, electrochromic layers formed on the transparent electrodes, and a liquid electrolyte disposed in the cell. The electrochromic layer is formed in the following manner. A metal compound such as tungsten chloride (WCl.sub.6) is dissolved in an organic solvent such as an alcohol to obtain an organic solution including hydroxide (W(OH).sub.6). The organic solution is painted on the transparent electrode and, then calcined to obtain the electrochromic layer including tungsten oxide (WO.sub.3).

Growing community of inventors

Ikoma, Japan

Junichi Washo