Futaba Corporation

Hamamatsu-Photonics K.k.

Neturen Co., Ltd.

Futaba Denshi Kogyo Kabushiki Kaisha

Yoshihisa Marushima

Kazuhito Nakamura

Akira Matsumoto

Tatsuya Nakamura

Yoshitaka Sato

Yuuichi Kogure

Norimasa Kosugi

Naoki Okumura

Shigeo Itoh

Yoshiaki Inoue

Tomoyuki Okada

Yoshihisa Tsuruoka

Kazuhiro Kawasaki

Takeshi Tonegawa

Toru Fujita

Masateru Taniguchi

Mamoru Namikawa

Kiyoyuki Deguchi

Seiji Yokota

Osamu Idohara

Youhei Fujimura

Kenji Nawamaki

Sadanori Takayama

Yasumoto Kubo

In an X-ray radiation source, a counter wall made of alkali-containing glass, out of walls of a housing of an X-ray tube, is sandwiched between a filament and an electric field control electrode to each of which a negative high voltage is applied. This configuration prevents an electric field from being generated in the counter wall and thus suppresses precipitation of alkali ions from the glass. Therefore, it prevents change in potential relationship between electrodes at different potentials such as the filament, grid, and target and enables stable operation to be maintained, without occurrence of a trouble of failure in maintaining a desired X-ray amount.

X-ray radiation source and X-ray tube

In an X-ray radiation source, a counter wall made of alkali-containing glass, out of walls of a housing of an X-ray tube, is arranged opposite to a high-voltage region VH of a power supply unit including a high-voltage generation module which generates a negative high voltage to be applied to a filament. This configuration prevents an electric field from being generated in the counter wall and thus suppresses precipitation of alkali ions from the glass. Therefore, it prevents change in potential relationship between electrodes at different potentials such as the filament, grid, and target and prevents occurrence of a trouble of failure in maintaining a desired X-ray amount, thus enabling stable operation to be maintained.

X-ray radiation source

An X-ray tube includes a radiopaque substrate including a window portion, an X-ray transmission window closing the window portion, an X-ray target provided at the window portion from an inner surface side of the substrate, a highly-evacuated container portion attached to the inner surface of the substrate, a cathode, a first control electrode and a second control electrode provided inside the container portion. A shielding electrode is provided at the inner surface of the substrate so as to surround the window portion. Electrons collide with the X-ray target to generate X-rays. Electrons reflected on the X-ray target between the shielding electrodes are absorbed by the shielding electrodes, so an inner surface of the container portion is not charged. The electron emission from the cathode is not affected by the reflected electrons, so a change in target current is small, and thus X-rays of substantially constant intensity can be radiated.

X-ray tube

An X-ray tube is disclosed. The X-ray tube includes a substrate, a box-shaped case attached to the substrate and being in a high-vacuum state, an X-ray target arranged in the opening of the first substrate in the inside of the case, and a cathode arranged in the case and supplying an electron to the X-ray target. The substrate includes first and second substrates made of 426 alloy and respectively having an opening of honeycomb structure, and an X-ray transmissive window sandwiched between the first and second substrates which is made of a titanium foil and close the opening. The X-ray transmissive window is reinforced by a honeycomb structure of the substrate from both surfaces. Thus, the substrate and the X-ray transmissive window are not deformed, and strength of the package is improved.

A non-evaporation getter material suitable for non-evaporation getters disposed in electron devices, such as fluorescent luminous tubes. The getter material is sized and shaped to more efficiently absorb gases actively at low temperatures.

Electron devices with non-evaporation-type getters and method for manufacturing the same

In an organic electroluminescence (EL) device including a display section having one or more light emitting units and a monitoring section positioned outside the display section and having one or more monitoring cells, each of the light emitting units and the monitoring cells has a cathode, an anode and at least one organic EL layer positioned between the cathode and the anode. In the organic EL device, either cathodes or anodes of the light emitting units and the monitoring cells is transparent and a current passing through an anode and a cathode of a monitoring cell is monitored to control the light emitting units.

Organic electroluminescence device and method for driving same

Growing community of inventors

Mobara, Japan

Yoshihisa Marushima