49results about "Gas plasma lamps" patented technology

The invention relates to light sources with laser pumping and to methods for generating radiation with a high luminance in the ultraviolet (UV) and visible spectral ranges. The technical result of the invention includes extending the functional possibilities of a light source with laser pumping by virtue of increasing the luminance, increasing the coefficient of absorption of the laser radiation by a plasma, and significantly reducing the numerical aperture of a divergent laser beam which is to be occluded and which is passing through the plasma. The device comprises a chamber containing a gas, a laser producing a laser beam, an optical element, a region of radiating plasma produced in the chamber by the focused laser beam, an occluder, which is mounted on the axis of the divergent laser beam on the second side of the chamber and an optical system for collecting plasma radiation.

A planar electron emitter, based on the existence of quasi-ballistic transport of electrons is disclosed. In its preferred embodiment the planar electron emitter structure consists of a body of finite gap pure semiconductor or insulator, the said body of macroscopic thickness (˜1 mm) being terminated by two parallel surfaces and of a set of two electrodes deposited/grown on the said two free surfaces such that when a low external electrical field (˜100 V/cm) is applied to this structure, consisting of two electrodes and the said semiconductor or insulating body sandwiched between them, a large fraction of electrons injected into the said semiconductor or insulator body from the negatively charged electrode (cathode) is quasi-ballistic in nature, that is this fraction of injected electrons is accelerated within the said semiconductor or insulator body without suffering any appreciable inelastic energy losses, thereby achieving sufficient energy and appropriate momentum at the positively charged electrode (anode) to be able to traverse through the said anode and to escape from the said structure into empty space (vacuum), said semiconductor or insulator body comprises a material or material system having a predetermined crystal orientation.

The present invention relates to an arrangement for emitting light comprising: a hermetically sealed caving (4) including a transparent or translucent window (10); a layer (3) of a fluorescent substance arranged within said casing covering at least a major part of said window; an electron emitting cathode (1) arranged within said casing for emission of electrons; and an anode (2). Said caving is filled with a has suitable for electron avalanche amplification. Said cathode and anode are, during use, held at electric potentials such that said emitted electrons are accelerated and avalanche amplified in said gas: and said layer is arranged to emit light through raid window in response to being bombarded by avalanche amplified electrons and/or in response to being exposed to ultraviolet light as being emitted in the gas due w interactions between the avalanche amplified electrons and the gas.

In the gas discharge tube of the present invention, for elongating the life of the discharge tube itself while lowering the assembling temperature, a side tube itself is formed from glass, and a metal is employed in a joint between a stem and the side tube. Namely, a metal-made first peripheral portion provided in the stem and a metal-made second peripheral portion provided in the side tube are utilized in the joint. As a result, the discharge tube itself can be made smaller.

Provided are a light emitting device using electron emission with a low driving voltage and high luminous efficiency, and a flat display apparatus using the light emitting device. In addition, a light emitting device using electron emission in which with a nano-sized gap can be formed with repeatability and have reliability is provided. The light emitting device includes: a plurality of PN junctions, each including a depletion layer having a predetermined thickness; an anode electrode facing the depletion layer and separated from the depletion layer by a predetermined distance; and a phosphor layer formed on a surface of the anode electrode. The flat display apparatus includes the light emitting device.

The invention adopts a radio frequency gas discharge manner to excite the inert gas plasmas and provides a device for generating a vacuum ultraviolet light source. The device comprises four parts: a central cylindrical shaped interaction cavity, a coaxial circular power charge light source cavity, a radio frequency spiral resonance excitation cavity and an ultrahigh vacuum flange connection component. The device uses a circular tube made of magnesium fluoride crystal materials as its optical window; the vacuum ultraviolet light is generated in the coaxial circular power charge light source cavity on the outer wall of magnesium fluoride circular tube, then penetrates and is radiated into the central cylindrical shaped interaction cavity so that the light could act on a target material directly. In this manner, the travel distance of the light rays is shortened; the effective size of the light source is increased; the beam-divergence angle is reduced; and the utilization efficiency of the light source is increased. According to the invention, the device adopts an electrodeless radio frequency charge manner to excite the gas plasmas, and produces vacuum ultraviolent photons with specific wavelengths by filling different inert gases. Through the adjustment of the parameters of the gases like gas pressure, radio frequency and power, it is possible to adjust the output power of the vacuum ultraviolet light so as to meet the requirements of various applications on the light source.

A light source has a rear glass substrate and a front glass substrate having a plate surface disposed in facing relation to a principal surface of the rear glass substrate. The plate surface of the front glass substrate is coated with a phosphor. A two-dimensional array of electron emitters is disposed on the principal surface of the rear glass substrate. A space defined between the rear glass substrate and the front glass substrate is filled with a gas. The gas may be an Hg (mercury) gas or an Xe (xenon) gas.

The invention discloses a plasma illuminating lamp control device which comprises a radio frequency exciting source, a radio frequency power amplification circuit and a switching power unit. The plasma illuminating lamp control device is also provided with a microcontroller unit, wherein a radio frequency exciting source signal control and output end of the microcontroller unit is connected with a control end of the radio frequency exciting source; the frequency of output signals of the radio frequency exciting source is controlled by the microcontroller unit according to the luminescence characteristics of a plasma lamp; and the microcontroller unit controls the attenuation amplitude of an automatic attenuation control circuit to radio frequency exciting source signals according to signals output by a signal resource detecting circuit and power required to be output for exciting plasmas. The invention combines the luminescence characteristics of the plasmas, improves the luminescencequality of the plasma lamp and ensures that a light source emitted by the plasma lamp after the plasma lamp is excited is closer to the natural light, the start of the plasma lamp is more stable, andthe plasma lamp can continuously and stably give out light.

A pixel structure of display apparatus includes a first substrate and a second substrate. Several cathode structure layers are disposed on the first substrate. The second substrate is a light-transmissive material. Several anode structure layers are disposed on the second substrate, and are light-transmissive conductive materials. The first substrate faces to the second substrate, so that the cathode structure layers are respectively aligned with the anode structure layers. A separation structure is disposed between the first substrate and the second substrate, for respective partitioning the anode structure layers and the cathode structure layers to form several spaces. Several fluorescent layers are respectively disposed between the anode structure layers and the cathode structure layers. A low-pressure gas is respectively filled into the spaces. The low-pressure gas has an electron mean free path, allowing at least sufficient amount of electrons to directly impinge the fluorescent layer under an operation voltage.

The invention belongs to the technical field of low-temperature plasmas, and in particular relates to a surface wave plasma light source based on guidance of a quartz tube. The quartz tube is utilized to guide microwaves, a surface wave principle is adopted to excite and ionize a working gas in the quartz tube to generate plasmas, and spectra radiated by the plasmas are used as a light source. The light source comprises a microwave system formed by a micro-solid microwave generator, a rectangular waveguide and a coupler, and a light-emitting system formed by the quartz tube, a conductive transparent film and the working gas. The light source has the advantages of simple equipment, compact structure, moderate cost and higher efficiency, and is applied to various purposes; and aiming at application requirements, different working gases can be selected to generate corresponding spectral radiance. The light source uses proper gas components only and can be used as a lighting source as well as realizes mercuration-free green lighting. Each part of the light source system can be modularized and replaced conveniently and has high stability.

A method of manufacturing an electromagnetic wave shield for a plasma display panel having a first panel having an image-displaying surface, the method including coating the image-displaying surface of the first panel with a coating solution to form a hydrophobic layer; applying a conductive ink to the hydrophobic layer utilizing an ink-jet applicator to form a pattern of the conductive ink; and heating the conductive ink and the hydrophobic layer to form a conductive mesh pattern on the hydrophobic layer.

The invention provides a high-efficiency and high-brightness vacuum ultraviolet light source apparatus. The apparatus comprises a plasma retainer, a radio frequency electric field focuser, and a sealing fixing device. According to the apparatus, a high-density radio frequency electric field (the intensity of the electric field can reach 107 V/m) is formed in a local space by employing a plasma local field principle, ionization excitation of plasma can be directly performed without a conventional ignition device, the system is simplified, and the practicality and the stability are improved; the ultraviolet light light-emitting intensity above the grade of 10<18> photons/(Sr*S) can be realized through reasonable configuration of dimension parameters and air-inlet parameters of the radio frequency electric field focuser and the plasma retainer; the apparatus is free of the conventional working gas, various different working gases can be used, and the energy of the emitted ultraviolet light can cover 6-50 eV; and the ultra-long service lifetime of more than 10,000 hours can be provided.

The invention provides a device for generating a high-flux plane light source. The device mainly comprises a tubular arc chamber, n rod-like cathodes, a tabular anode in the middle of which a round hole is formed and a quartz transmitting window, wherein one end of the arc chamber is provided with the tabular anode, and the other end of the arc chamber is provided with the quartz transmitting window; emission ends of the n cathodes are respectively located at all vertexes of an N-polygon in the arc chamber; the N-polygon, the arc chamber and the round hole of the anode are coaxial; gas injection apertures are distributed around each cathode on the wall of the arc chamber; electric arcs starting from the emission ends of the n cathodes are gathered to the round hole of the anode, and therefore roughly uniform disk-shaped plasmas are formed; generated high-strength emitted light is directly reflected by the wall of the arc chamber, and thus, the high-flux plane light source which is comparatively uniform is formed on the outer part of the transmitting window; the flow of gas is forced to stabilize the electric arcs so as to protect the transmitting window and the wall of the arc chamber from electrode ablated vapor pollution. The device provided by the invention has the advantages that the power of the electric arcs is improved, the luminous efficacy is enhanced, and by a gas flow design, the transmitting window and the wall of the arc chamber are protected from the metallic vapor pollution.

An electron emission light-emitting device includes a cathode structure, an anode structure, a fluorescent layer, and a low-pressure gas layer. The fluorescent layer is located between the cathode structure and the anode structure. The low-pressure gas layer is filled between the cathode structure and the anode structure, having a function of inducing the cathode to emit electron uniformly. The low-pressure gas layer has an electron mean free path, allowing at least sufficient amount of electrons to directly impinge the fluorescent layer under an operation voltage.

The invention discloses a plasma flat plate light source, comprising a front substrate and a back substrate, a discharge cavity is arranged between the front substrate and the back substrate, the front substrate and/or the back substrate is equipped with a first electrode and a second electrode, which are located in the discharge cavity, the front substrate is also provided with a medium layer, the first electrode and the second electrode are located between the front substrate and the medium layer, the medium layer is provided with a protecting film, the back substrate is provided with a thick fluorescent powder layer, the first electrode and/or the second electrode consists of planar electrodes connected with three-dimensional electrode standing on the planar electrodes. According to the invention, the discharge efficiency of the plasma is improved, the brightness of the plasma light source is increased, and the lighting efficiency is also improved.

A discharge light-emitting device includes an outer envelope filled with discharge gas and a pair of electrodes contained in the outer envelope is provided. At least one of the electrodes includes an electrically conductive substrate, an n-type semiconductor layer provided on the substrate, and a p-type diamond layer provided on the n-type semiconductor layer.

A laser-sustained plasma light source for transverse plasma pumping includes a pump source configured to generate pumping illumination, one or more illumination optical elements and a gas containment structure configured to contain a volume of gas. The one or more illumination optical elements are configured to sustain a plasma within the volume of gas of the gas containment structure by directing pump illumination along a pump path to one or more focal spots within the volume of gas. The one or more collection optical elements are configured to collect broadband radiation emitted by the plasma along a collection path. Further, the illumination optical elements are configured to define the pump path such that pump illumination impinges the plasma along a direction transverse to a direction of propagation of the emitted broadband light of the collection path such that the pump illumination is substantially decoupled from the emitted broadband radiation.