Abstract:
A device which can produce a bright, raster scanned or non-raster scanned image from a flat panel. Unlike many flat panel technologies, this device does not require ambient light or auxiliary illumination for viewing the image. Rather, this device relies on electrons emitted from a ferroelectric emitter impinging on a phosphor. This device takes advantage of a new electron emitter technology which emits electrons with significant kinetic energy and beam current density.
Abstract:
본 발명은 카본계 물질; 수지 성분과 용매 성분으로 이루어진 비이클; 및 강유전성 분말;을 포함하는 전자 방출원 형성용 조성물과, 이로부터 형성되어 카본계 물질과 강유전성 분말을 포함하는 전자 방출원, 및 이를 채용한 전자 방출 소자를 제공한다. 본 발명의 전자 방출원 형성용 조성물은 강유전성 분말을 함유하고 있어 전계 방출에 의한 열을 흡수하여 열방출로 전환시켜 주기 때문에 전체적인 전자방출 성능이 개선되고, 탄소나노튜브의 열화속도가 지연될 수 있다. 따라서 상기 전자 방출원을 이용하면 신뢰성이 향상된 전자 방출 소자를 얻을 수 있다.
Abstract:
본 발명은 카본계 물질; 수지 성분과 용매 성분으로 이루어진 비이클; 및 강유전성 분말;을 포함하는 전자 방출원 형성용 조성물과, 이로부터 형성되어 카본계 물질과 강유전성 분말을 포함하는 전자 방출원, 및 이를 채용한 전자 방출 소자를 제공한다. 본 발명의 전자 방출원 형성용 조성물은 강유전성 분말을 함유하고 있어 전계 방출에 의한 열을 흡수하여 열방출로 전환시켜 주기 때문에 전체적인 전자방출 성능이 개선되고, 탄소나노튜브의 열화속도가 지연될 수 있다. 따라서 상기 전자 방출원을 이용하면 신뢰성이 향상된 전자 방출 소자를 얻을 수 있다.
Abstract:
Disclosed are methods and devices suitable for generating electron beams and pulses of radiation. Specifically, in some disclosed embodiments, multiple emitting electrodes of a ferroelectric emitter are sequentially activated, generating a relatively long electron beam pulse that is substantially a series of substantially consecutive short electron beam pulses generated by the sequentially-activated individual emitting electrodes.
Abstract:
Disclosed are methods and devices suitable for generating electron beams and pulses of radiation. Specifically, in some disclosed embodiments, multiple emitting electrodes of a ferroelectric emitter are sequentially activated, generating a relatively long electron beam pulse that is substantially a series of substantially consecutive short electron beam pulses generated by the sequentially-activated individual emitting electrodes.
Abstract:
A dielectric device of higher performance is provided. An electron emitter, to which the dielectric device is applied is provided with: an emitter including a dielectric; and an upper electrode and a lower electrode to which drive voltage is applied in order to emit electrons. The emitter is formed by the aerosol deposition method or the sol impregnation method.
Abstract:
A dielectric device of higher performance is provided. An electron emitter (10A) to which the dielectric device of the present invention is applied includes an emitter (12) formed by a dielectric, and an upper electrode (14) and a lower electrode (16) to which a drive voltage is applied for the purpose of electron emission. The emitter includes an upper layer (12c) formed from plural dielectric particles (12e), and a lower layer (12d) formed from plural dielectric particles, below the upper layer. The upper layer and/or lower layer are formed by aerosol deposition.
Abstract:
A catheter for emitting radiation is disclosed, comprising a catheter shaft (104), and an x-ray unit (102) attached to the distal end of the catheter shaft. The x-ray unit comprises an anode (112), and a cathode (110) coupled to an insulator (108) to define a vacuum chamber (106). The cathode is preferably a field emission cathode of graphite or graphite coated with titanium carbide, for example. The anode is preferably tungsten, and the insulator is preferably pyrolytic boron nitride. The x-ray unit is preferably coupled to a voltage source through a coaxial cable. The anode is preferably a heavy metal such as tungsten. The cathode may also be a ferroelectric material. The x-ray unit can have a diameter less than about 4mm, and a length less than about 15 mm. Methods of use of the catheter are also disclosed. The catheter of the present invention can be used to irradiate the site of an angioplasty procedure to prevent restenosis. It can also be used to treat other conditions in any vessel, lumen or cavity of the body.
Abstract:
An electron-emitting element includes an electric field applying portion composed of a dielectric, a first electrode formed on one surface of the electric field applying portion, and a second electrode being formed on the surface and forming a slit in cooperation with the first electrode, and is formed on a substrate.