Sharp Kabushiki Kaisha Corporation

Ayae Nagaoka

Tadashi Iwamatsu

Hiroyuki Hirakawa

Yasuo Imura

Keiichi Kikawa

Katsuru Matsumoto

Kanako Hirata

Takanori Kamoto

Nobuyuki Yoshioka

Osamu Wada

Toshihiro Kaneko

An electron emission element () includes an electrode substrate () and a thin film electrode (), and emits electrons from the thin film electrode () by voltage application across the electrode substrate () and the thin film electrode (). An electron accelerating layer () containing at least insulating fine particles () is provided between the electrode substrate () and the thin film electrode (). The electrode substrate () has a convexoconcave surface. The thin film electrode () has openings () above convex parts of the electrode substrate ().

Electron emission element, electron emission device, charge device, image forming device, electron radiation curing device, light-emitting device, image display device, blower device, cooling device, and manufacturing method for electron emission element

The present invention provides an electron emitting element, comprising: a first electrode; an insulating fine particle layer formed on the first electrode and composed of insulating fine particles; and a second electrode formed on the insulating fine particle layer, wherein the insulating fine particle layer is provided with recesses formed in a surface thereof, the surface facing the second electrode, the recesses each having a depth smaller than a thickness of the insulating fine particle layer, and when a voltage is applied between the first electrode and the second electrode, electrons provided from the first electrode are accelerated in the insulating fine particle layer to be emitted though the second electrode.

Electron emitting element, devices utilizing said element, and method for producing said element

An electron emitting element of the present invention includes an electron acceleration layer between an electrode substrate and a thin-film electrode. The electron acceleration layer includes a binder component in which insulating fine particles and conductive fine particles are dispersed. Therefore, the electron emitting element of the present invention is capable of preventing degradation of the electron acceleration layer and can efficiently and steadily emit electrons not only in vacuum but also under the atmospheric pressure. Further, the electron emitting element of the present invention can be formed so as to have an improved mechanical strength.

Electron emitting element, electron emitting device, light emitting device, image display device, air blowing device, cooling device, charging device, image forming apparatus, electron-beam curing device, and method for producing electron emitting element

An electron emitting element of the present invention includes an electron acceleration layer sandwiched between an electrode substrate and a thin-film electrode, and the electron acceleration layer includes a fine particle layer containing insulating fine particles and a basic dispersant. This makes it possible to provide an electron emitting element which does not cause insulation breakdown in an insulating layer and which can be produced at a low cost.

Electron emitting element including a fine particle layer containing insulating particles, and devices and methods related thereto

The present invention provides an electron emitting element, comprising: a first electrode; an insulating fine particle layer formed on the first electrode and composed of insulating fine particles; and a second electrode formed on the insulating fine particle layer, wherein the insulating fine particles are monodisperse fine particles, and when voltage is applied between the first electrode and the second electrode, electrons are discharged from the first electrode into the insulating fine particle layer and accelerated through the insulating fine particle layer to be emitted from the second electrode.

Electron emitting element and method for producing the same

An electron emitting element includes an electrode substrate, a thin-film electrode, and an electron acceleration layer provided between them. The electron acceleration layer includes a fine particle layer containing insulating fine particles, which is provided on a side of the electrode substrate, and a deposition of conductive fine particles, which is provided on a surface of the fine particle layer. In the electron acceleration layer, a conductive path is formed in advance, and the deposition has a physical recess which is an exit of the conductive path and which serves as an electron emitting section. Electrons are emitted via the electron emitting section. With the arrangement, it is possible to realize an electron emitting element which prevents that an electrode on an electron emission side gradually wears off along with electron emission and which can maintain an electron emission characteristic for a long period.

Electron emitting element having an electron acceleration layer using fine particle layer

An electron emitting element of the present invention includes an electron acceleration layer provided between an electrode substrate and a thin-film electrode, which electron acceleration layer includes (a) conductive fine particles and (b) insulating fine particles having an average particle diameter greater than that of the conductive fine particles. The electron emitting element satisfies the following relational expression: 0.3x+3.9&#x2266;y&#x2266;75, where x (nm) is an average particle diameter of the insulating fine particles, and y (nm) is a thickness of the thin-film electrode Such a configuration allows modification of the thickness of the thin-film electrode with respect to the size of the insulating particles, thereby ensuring electrical conduction and allowing sufficient current to flow inside the element. As a result, stable emission of ballistic electrons from the thin-film electrode is possible.

Electron emitting element having an electron acceleration layer, electron emitting device, light emitting device, image display device, cooling device, and charging device

A resin-coated carrier is provided. A resin-coated carrier includes a carrier core and a resin coating layer formed on a surface of the carrier core. The carrier core is composed of a porous material having surface fine pores formed on a surface thereof, and has an apparent density of 1.6 to 2.0 g/cm. The resin coating layer contains cross-linked fine resin particles. Additionally, the resin-coated carrier is configured such that a volume average particle size of the cross-linked fine resin particles contained in the resin coating layer and an area average diameter of the surface fine pores satisfy a predetermined relational expression.

Resin-coated carrier method of manufacturing the same, two-component developer including resin-coated carrier, developing device and image forming apparatus

According to an electron emitting element of the present invention, an electron acceleration layer sandwiched between an electrode substrate and a thin-film electrode contains (i) insulating fine particles and (ii) at least one of (a) conductive fine particles having an average particle diameter smaller than an average particle diameter of the insulating fine particles and (b) a basic dispersant. The electron acceleration layer has a surface roughness of 0.2 &#x3bc;m or less in centerline average roughness (Ra). The thin-film electrode has a film thickness of 100 nm or less. As such, according to the electron emitting element of the present invention, it is possible to reduce the thickness of the thin-film electrode to an appropriate thickness. Accordingly, it is possible to increase electron emission.

Electron emitting element, electron emitting device, charging device, image forming apparatus, electron-beam curing device, light emitting device, image display device, air blowing device, and cooling device

The present invention provides an electron emitting element which has good energy efficiency and which is capable of controlling a value of current flowing in an electron acceleration layer and an amount of emitted electrons by adjusting a resistance value of the electron acceleration layer and an amount of generated ballistic electrons. An electron emitting elementincludes an electron acceleration layerincluding a fine particle layer containing insulating fine particles. In the electron emitting element

Electron emitting element, electron emitting device, light emitting device, image display device, air blowing device, cooling device, charging device, image forming apparatus, and electron-beam curing device

A light emitting element of the present invention includes an electrode substrate; a thin-film electrode; and an electron acceleration layer sandwiched between the electrode substrate and the thin-film electrode. In the electron acceleration layer, as a result of a voltage applied between the electrode substrate and the thin-film electrode, electrons are accelerated so as to be turned into hot electrons. The hot electrons excite surfaces of the silicon fine particles contained in the electron acceleration layer so that the surfaces of the silicon fine particles emit light. Such a light emitting element of the present invention is a novel light emitting element, which has not been achieved by the conventional techniques. That is, the light emitting element of the present invention is able to (i) be produced by using a silicon material, which is available at low price, through a simple production method, and (ii) efficiently emit light.

Light emitting element, light emitting device, image display device, method of driving light emitting element, and method of producing light emitting element

The toner includes a plurality of toner particles containing a binder resin and a colorant. In toner particles, according to measurement by a flow particle image analyzer, the content of small size particles having a circle-equivalent diameter of 0.5 to 2.0 &#x3bc;m is 5% by number or less based on the entire toner particles, the content of medium size particles having a circle-equivalent diameter of more than 2.0 &#x3bc;m and 4.0 &#x3bc;m or less is 20% by number or more and 30% by number or less based on the entire toner particles, and the content of large size particles having a circle-equivalent diameter of more than 4.0 &#x3bc;m and 6.0 &#x3bc;m or less is 50% by number or more and 70% by number or less based on the entire toner particles, and the shape factor of the toner particles SFis 130 or more and 140 or less.

Toner, method of manufacturing toner, developer, two-component developer, developing device, and image forming apparatus

Method of manufacturing resin particles capable of manufacturing resin particles of controlled particle size stably and efficiently by removing bubbles from the surface of a molten kneaded product as the raw material for resin particles thereby sufficiently ensuring action sites for a surfactant on the surface of the molten kneaded product, is provided. The method includes a coarsely-pulverizing step of pressurizing a mixture of a molten kneaded product containing a synthetic resin and an aqueous medium containing a surfactant to 15 MPa to 120 MPa thereby removing bubbles attached to the molten kneaded product containing the synthetic resin, and a finely-granulating step of finely granulating, by a high pressure homogenizer method, an aqueous slurry containing coarse particles of a molten kneaded product passing through a pressure proof nozzle in the coarsely-pulverizing step and in a state where bubbles attached to the surface are removed.

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Osaka, Japan

Ayae Nagaoka