Patent application number | Description | Published |
20090243497 | IMAGE DISPLAY APPARATUS AND METHOD FOR DRIVING THE SAME - An image display apparatus includes a rear plate including electron-emitting devices, a face plate including an anode electrode, a voltage applying unit configured to apply a voltage to the anode electrode, a switching unit configured to switch between a display state of displaying an image and a non-display state of displaying no image, and a timing unit. The timing unit measures a non-display time, which is an amount of time that the switching unit allows the non-display state to continue. After the timing unit has measured a certain non-display time, the voltage applying unit applies, to the anode electrode, a second voltage lower than a first voltage to be applied in the display state, to enable the electron-emitting devices to emit electrons. | 10-01-2009 |
20090291611 | MANUFACTURING METHODS OF AIRTIGHT CONTAINER AND IMAGE DISPLAY APPARATUS - Provided is a manufacturing method of an airtight container, comprising: an electron beam irradiation process for irradiating an electron beam to a non-evaporable type getter that has not been activated so as not to activate the non-evaporable type getter; and a sealing process for sealing a seal portion after the electron beam irradiation process, and thereby forming the airtight container. | 11-26-2009 |
20120121069 | X-RAY GENERATING APPARATUS AND METHOD OF DRIVING X-RAY TUBE - An inverter circuit is shared by respective drive circuits that supply a predetermined voltage to a lens electrode and a grid electrode, or to a lens electrode and a cathode electrode. A DC voltage obtained by full-wave rectifying a pulse train output from the inverter circuit is supplied to the lens electrode, a DC voltage obtained by half-wave rectifying a pulse train output from the inverter circuit is supplied to the grid electrode or cathode electrode. At times of a first operation and a last operation of the inverter circuit during a period of generating X-rays, operations of the inverter circuit are controlled such that a trans circuit outputs a negative polarity voltage to the full-wave rectifying circuit and the half-wave rectifying circuit, respectively. | 05-17-2012 |
20120307974 | X-RAY TUBE AND RADIATION IMAGING APPARATUS - An X-ray tube comprises: an envelope which has a cathode at one end and an anode at another end of a barrel of a tubular insulating tube and which has a sealed interior; an electron gun which is arranged inside the envelope and has a shape that protrudes from the cathode; and a target which is electrically connected to the anode and generates X-rays when being irradiated with electrons emitted from the electron gun. With reference to an end position that is a projection of a position of an end on the anode side of the electron gun onto an inner wall of the insulating tube, a mean wall thickness of the barrel is greater on the cathode side than on the anode side. | 12-06-2012 |
20120318987 | RADIOACTIVE RAY GENERATING APPARATUS AND RADIOACTIVE RAY IMAGING SYSTEM - A radioactive ray generating apparatus includes a second shielding member, a target, and a first shielding member, which are sequentially disposed from an electron emission source side. A shortest distance from a maximum radiation intensity portion of the target to the first shielding member is shorter than a shortest distance from the maximum radiation intensity portion of the target to the second shielding member. | 12-20-2012 |
20130129045 | TRANSMISSION TYPE RADIATION GENERATING SOURCE AND RADIOGRAPHY APPARATUS INCLUDING SAME - A transmission type radiation generating device includes an electron emitting source; a substrate that transmits radiation; a target provided on a surface of the substrate facing the electron emitting source and configured to generate radiation when electrons emitted from the electron emitting source are applied thereto; a shield member having a radiation passage that allows the radiation transmitted through the substrate to pass therethrough, the shield member being connected to the substrate and including at least a forward shield portion that protrudes in a direction away from the electron emitting source with respect to the target; and an insulating fluid in contact with the forward shield portion. The shield member includes a low-melting-point metal or a low-melting point alloy provided at least in the forward shield portion. | 05-23-2013 |
20130195246 | TARGET STRUCTURE AND RADIATION GENERATING APPARATUS - A radiation-transmissive type target structure includes a target layer formed on a substrate. The target layer has a thickness equal to or less than 20 μm, and is configured to generate radiation in response to irradiation of electrons. A surface of the target layer is formed with projecting portions and depressed portions, the depressed portions have a depth of at least half the thickness of the target layer. Advantageously, separation of the target layer at an interface between the substrate and the target layer is substantially prevented. A radiation generating apparatus and a radiography system equipped with the target structure are also disclosed. | 08-01-2013 |
20130230143 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - A radiation generating apparatus | 09-05-2013 |
20130235975 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - There is provided a radiation generating apparatus having a simple structure and capable of shielding unnecessary radiation, cooling a target, reducing the size and weight of the apparatus, and achieving higher reliability, and a radiation imaging apparatus having the same. A transmission type radiation tube is held inside a holding container filled with a cooling medium. The transmission type radiation tube includes an envelope having an aperture, an electron source arranged inside the envelope so as to face the aperture of the envelope, a target unit for generating a radiation responsive to an irradiation with an electron emitted from the electron source, and a shield member for shielding a part of the radiation emitted from the target unit. The cooling medium contacts at least a part of the shield member. | 09-12-2013 |
20140029725 | X-RAY GENERATOR AND X-RAY IMAGING APPARATUS INCLUDING THE SAME - Provided is an X-ray generator comprising an X-ray tube including a cylindrical body; an electron source in the body; a target at an end of the X-ray tube facing the electron source, the target generating X-rays by irradiation with electrons; a container in which the X-ray tube is arranged; insulating liquid filled between the X-ray tube and the container; and
| 01-30-2014 |
20140112450 | X-RAY EMITTING TARGET AND X-RAY EMITTING DEVICE - An X-ray emitting target including a diamond substrate, a first layer disposed on the diamond substrate and including a first metal, and a second layer disposed on the first layer and including a second metal whose atomic number is 42 or more and which has a thermal conductivity higher than that of the first metal. Carbide of the first metal is present at a boundary between the diamond substrate and the first layer. The target is prevented from overheating, so that output variation due to rising temperature is suppressed. Thus it is possible to emit stable and high output X-rays. | 04-24-2014 |
20140126701 | X-RAY EMITTING TARGET AND X-RAY EMITTING DEVICE - An X-ray emitting target including a diamond substrate, a first layer disposed on the diamond substrate and including a first metal, and a second layer disposed on the first layer and including a second metal whose atomic number is 42 or more and which has a thermal conductivity higher than that of the first metal. The layer thickness of the first layer is greater than or equal to 0.1 nm and smaller than or equal to 100 nm. The target is prevented from overheating, so that output variation due to rising temperature is suppressed. Thus it is possible to emit stable and high output X-rays. | 05-08-2014 |
20140140480 | RADIATION GENERATING TUBE AND RADIATION IMAGING APPARATUS USING THE SAME - A radiation generating tube | 05-22-2014 |
20140177796 | X-RAY TUBE - In an X-ray tube having an X-ray shielding member allowing an electron ray to pass through an electron passing hole toward a target, separately from the cathode-side opening of the electron passing hole, a gas exhaust path allowing communication between the inside and outside of the electron passing hole is provided so that gas molecules generated in the electron passing hole can be easily diffused out of the electron passing hole. The degradation of the cathode caused by accelerated collisions with the cathode, of cations generated by collisions of electrons with gas molecules generated in the electron passing hole by a desorption phenomenon due to electron ray irradiation to the target, is reduced. | 06-26-2014 |
20140177800 | TARGET STRUCTURE AND X-RAY GENERATING APPARATUS - In a target structure according to the present invention, a target is provided on a central area of an insulating substrate, and a first conductive member for supplying a voltage to the target is provided on a peripheral area of the insulating substrate which is exclusive of an area overlapping the target and is not covered by the target, so that the first conductive member is in contact with and electrically connected to the peripheral portion of the target. Consequently, it is possible to easily form a voltage supply line to the target without preventing diffusion of a heat generated in the target to the substrate and while suppressing emission of an unnecessary X-ray. | 06-26-2014 |
20140203183 | RADIATION GENERATING TUBE, AND RADIATION GENERATING DEVICE AND APPARATUS INCLUDING THE TUBE - A radiation generating tube includes an electron emitting source configured to emit an electron beam; a target configured to generate radiation when the target is irradiated with the electron beam; a rear shield body having a tube-shaped electron passage with openings thereof at each end of the passage, and being located at the side of the electron emitting source with respect to the target, a first opening of the passage facing the electron emitting source and being separated from the electron emitting source, a second opening of the passage facing the target; and a brazing material joining the rear shield body with a peripheral edge of the target, at a position separated from the second opening. A closed space isolated from the electron passage is provided between the target and the rear shield body. | 07-24-2014 |
20140211919 | X-RAY GENERATOR AND X-RAY IMAGING APPARATUS - Provided is an X-ray generator which includes: an electron path | 07-31-2014 |
20140362974 | X-RAY GENERATING TUBE, X-RAY GENERATING APPARATUS AND X-RAY IMAGING SYSTEM USING THE SAME - Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film. | 12-11-2014 |
20140369467 | RADIATION GENERATING TUBE AND RADIATION GENERATING APPARATUS - The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer. | 12-18-2014 |
20140369469 | X-RAY GENERATION APPARATUS AND X-RAY RADIOGRAPHIC APPARATUS - In an X-ray generation apparatus of transmission type including an electron passage surrounded by and formed in an electron passage forming member, and generating an X-ray by colliding electrons having passed through the electron passage against a target, wherein the electron passage includes a secondary X-ray generation portion that generates an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion, the secondary X-ray generation portion and the target are arranged such that the X-ray generated with direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside, and an atomic number of a material of the electron passage forming member is larger than that of the target. X-ray generation efficiency is increased by effectively utilizing the electrons reflected by the target. | 12-18-2014 |
20140369470 | RADIATION GENERATING TUBE, AND RADIATION GENERATING APPARATUS AND RADIATION IMAGING SYSTEM USING THE SAME - Provided is a radiation generating tube in which an insulating tube is prevented from being damaged by heat generation of a target or an electron emitting source during drive. Extending portions extending along an outer periphery of an insulating tube are provided to a cathode and an anode, respectively, and the insulating tube is joined to the extending portions to enhance the strength of joint portions. At the same time, the insulating tube can be deformed easily by setting a tube wall thickness of the insulating tube at a central portion in a longitudinal direction to be smaller than a tube wall thickness of an opening end, and thus the concentration of thermal stress on the joint portions caused by an increase in temperature of the cathode and the anode is alleviated. | 12-18-2014 |