Abstract: In an image display apparatus using an FED or an organic EL element, image display that is high in illumination uniformity and high in image quality can be performed. A display element with a matrix structure which conducts linear sequential driving which determines the luminance by a current is used, a threshold voltage of a cathode line immediately before one select period has been terminated where a control electrode line is sequentially driven is measured by a threshold voltage measuring section, the measured threshold voltage is recorded for each of the pixels, and a driving signal at the time of selecting the pixel is corrected by using the value of the recorded threshold voltage, to thereby control electric charge that is emitted from a cathode.

Abstract: The present invention provides an emissive flat panel display device which is capable of performing a gate operation at a relatively low voltage of several V to several tens V using gate electrodes. In the emissive flat panel display device which includes a back panel which is constituted of a back substrate on which cathode electrodes having electron sources formed of carbon nanotubes and gate electrodes are formed, a face panel which forms phosphors and anode electrodes thereon, and a sealing frame which seals the back panel and the face panel, the difference between an electric field strength Emax for allowing the electron sources to obtain the required maximum emission current density and an electric field strength Emin which becomes the minimum emission current density is set to 1V/?m or less, and preferably 0.5V/?m or less.

Abstract: This invention relates to a field-emission-type flat-panel display apparatus that obtains an image by causing the electrons emitted from each of electron sources arranged in matrix form to impinge upon the phosphors formed on a phosphor screen. A carbon nanotube is used as an electron source material in this flat-panel display apparatus, and the electron sources are formed by printing. The vertical sizes of the depressions and projections on the surface of each electron source which has been formed by printing are suppressed to a value equal to or less than 1 ?m, preferably, equal to or less than 0.5 ?m. This makes it possible to obtain a flat-panel display apparatus of stable emission characteristics.

Abstract: The present invention provides an image display capable of reducing power used up or consumed by a thin-film electron-emitter matrix.

Abstract: An image display device in which a damage which is imparted to carbon nanotubes is small and electron emission characteristics are favorable and a production method thereof are provided. A printed film 6 having carbon nanotubes 3, a resin 4 and a carbon component 5 is formed on a cathode electrode 2 of a glass substrate 1 and, then, by irradiating laser having a short pulse and high output in an ultraviolet region on the thus-formed printed film 6, the resin 4 is thermally decomposed and evaporated and, thereafter, by an impact generated at that time, binding between carbon nanotubes 3 themselves in the vicinity of a surface of the printed film 6 is severed and, at the same time, the carbon nanotubes 3 come to be in a state of being raised on the surface of the printed film 6.

Abstract: Two electrodes out of a cathode electrode, a gate electrode and a focusing gate electrode are formed on a same plane of a back substrate adjacent to each other, and this electrode structure is stacked in plural stages whereby the number of steps of printing process for forming the respective electrodes can be decreased and the alignment accuracy at the time of manufacturing the electrode structure can be largely alleviated. Further, by forming the cathode electrode and the gate electrode using the same material which contains carbon nanotubes, the alignment accuracy at the time of manufacturing the electrode structure can be largely alleviated. Accordingly, it is possible to manufacture an emissive flat panel display device easily and at a low cost using printing coating process or the like which is usually used.

Abstract: A flat panel display having electron sources capable is of emitting electrons uniformly within the display surface. The flat panel display includes a rear panel formed by a rear substrate. Cathode electrodes are formed on the inner surface of the rear substrate. Layers forming the electron sources consist of carbon nanotubes and are formed on the cathode electrodes. The surfaces of layers of the electron sources are bristled with the carbon nanotubes. Multi-walled and single-walled carbon nanotubes are dispersed in the layers of the electron sources.

Abstract: A flat panel display includes an electron emitter plate provided with electron emitters, a phosphor plate provided with phosphors and a space defined by the electron emitter plate and the phosphor plate for form a substantial vacuum atmosphere therebetween, wherein a great number of fine recess structures are formed on the surface of a metal film formed on the electron emitter plate, and fine fibered substances or carbon nanotubes or substances containing the fine fibered substances or carbon nanotubes are arranged on the fine recess structures to form electron emitters.

Abstract: Using a cathode material with which an electron emission having sufficient intensity is obtained with a low electric field, over a back substrate, cathodes and first control electrodes are formed on the same plane, which is parallel to the back substrate, thus forming electron beam sources, and second control electrodes, which focus electrons taken out from the electron beam sources, are formed, whereby it is possible to obtain an image display of high brightness.

Abstract: To obtain an image display of high image quality with a high and contrast with the least blurring, an electron beam source panel includes cathodes which emit electron beams and control electrodes which control the strength of the electron beams, and a phosphor screen panel includes a light emitting surface having a phosphor capable of emitting light of the same color over the whole light emitting surface and anodes to which a potential is supplied necessary for the phosphor. The electron beam source panel and the phosphor screen panel are laminated to each other by way of spacers, the laminated structure is sealed by a frame glass and the inside of the sealed structure is evacuated to create a vacuum therein. The light emitting surface is divided in three or more regions, thus providing a flat panel backlight which selectively allows only some portions of the divided light emitting surface to emit light.

Abstract: The present invention provides an emissive flat panel display device which is capable of performing a gate operation at a relatively low voltage of several V to several tens V using gate electrodes. In the emissive flat panel display device which includes a back panel which is constituted of a back substrate on which cathode electrodes having electron sources formed of carbon nanotubes and gate electrodes are formed, a face panel which forms phosphors and anode electrodes thereon, and a sealing frame which seals the back panel and the face panel, the difference between an electric field strength Emax for allowing the electron sources to obtain the required maximum emission current density and an electric field strength Emin which becomes the minimum emission current density is set to 1V/?m or less, and preferably 0.5V/?m or less.

Abstract: An emissive flat panel display device has an electron emission and control structure which uses carbon nanotubes or the like as electron sources and is formed using a relatively inexpensive manufacturing technique. Cathode electrodes, an insulation layer and gate electrodes are formed on a back substrate by screen printing. Insulation-layer openings are formed in the insulation layer and control apertures are formed in the gate electrodes at the same positions as the insulation-layer apertures. Inner peripheries of the control apertures are retracted from inner peripheries of the insulation-layer apertures formed in the insulation layer, thus preventing sagging of a silver paste for gate electrodes into the insulation-layer apertures in a step for forming the gate electrodes. Ink containing carbon nanotubes is applied to the control apertures formed in the gate electrodes by an ink jet method or the like.

Abstract: As the top electrode material of a thin-film electron emitter, a material having a bandgap wider than that of Si and electrical conductivity is used. In particular, a conductive oxide such as an SnO2 or ITO film and a wide-bandgap semiconductor such as GaN or SiC are employed. The electron energy loss in a top electrode through which hot electrons pass can be reduced so as to enhance the electron emission efficiency. A high emission current can be obtained in the case of the same diode current as a prior art. In addition, in the case of the same emission current density as a prior art, a small driving current is enough. A bus line and driving circuits can be simplified.

Abstract: A display device includes a face substrate which has anodes and phosphors on an inner surface thereof, a back substrate which has cathode lines and electron sources formed on the cathode lines, a support body which is interposed between both substrates in a state that the support body surrounds a display region and forms a given inner space, and a sealing material which hermetically seals the support body and both substrates. To enable the display device to perform a high quality display and to have a long lifetime while ensuring the conduction in a wide range between the cathode lines and the electron sources, the cathode lines are made of a material having a conductor and an insulator and the composition of a connecting portion between the cathode line and the electron source is formed such that a conductor occupancy rate becomes equal to or more than an insulator occupancy rate.

Abstract: The present invention provides the structure which facilitates manufacturing of a flat type image display element which includes electrodes capable of enhancing the efficiency with an extremely small control electrode current using a cathode material which can obtain the sufficient intensity of electron emission in a low electric field. That is, the present invention provides the structure in which control electrodes and cathodes are formed substantially on a same plane on a first panel, while control electrode lines which electrically connect the control electrodes of a plurality of pixels are not included in a plane which is parallel to a phosphor screen panel and includes the cathodes and the control electrodes.

Abstract: A display having a second substrate with a phosphor layer formed on the surface and a first substrate disposed opposing to the first substrate and having electron guns formed thereon, said electron guns having a structure of: first conductive film laminated on the first substrate—insulating film—second conductive film, and said insulating film being one formed by anodizing the first conductive film by using a non-aqueous electrolyte containing an organic solvent such as a compound having an alcoholic hydroxyl group and at least one solute selected from salts of inorganic oxo acids and salts of organic carboxylic acids. According to this device, the quality of the insulating film forming the tunneling insulator of electron guns of the MIM diode structure is improved to prolong the service life of the device.

Abstract: There are realized display units which can increase the emitting point density of nanotube electron emitters as electron emitters and have a good image quality and their fabrication methods.

Abstract: An information processor of a high reliability and a high recording density, and a blue color, blue-violet color and violet color based semiconductor light emitting device operable at a low threshold current density, used for the same, are provided. An optical information processor of a high reliability and a high recording density enables a moving picture, such as a high-definition television picture, to be recorded and reproduced satisfactorily. A barrier layer in a quantum-well active layer of a semiconductor light emitting device is doped with n-type impurities at a high density. Alternatively, the face orientation of a quantum-well active layer of a semiconductor light emitting device is a plane inclined from the (0001) plane, whereby the threshold current value of the semiconductor light emitting device can be decreased. The semiconductor light emitting device is typified by a gallium nitride based compound semiconductor laser device.

Abstract: A flat panel display includes an electron emitter plate provided with electron emitters, a phosphor plate provided with phosphors and a space defined by the electron emitter plate and the phosphor plate for form a substantial vacuum atmosphere therebetween, wherein a great number of fine recess structures are formed on the surface of a metal film formed on the electron emitter plate, and fine fibered substances or carbon nanotubes or substances containing the fine fibered substances or carbon nanotubes are arranged on the fine recess structures to form electron emitters.

Abstract: A process for manufacturing a thin-film electron source including a lower electrode (11), an upper electrode, and an insulating layer sandwiched between the lower electrode (11) and the upper electrode. The process comprises a first step of forming an anodized film over the surface of the lower electrode (11) by an anodizing method, a second step of etching the surface side of the anodized film, and a third step of forming an anodized film again over the surface of the lower electrode (11) by an anodizing method to form said insulating layer. As a result, the film thickness of such an outer layer (26) of the insulating layer containing much impurity can be reduced to reduce the number of electron trapped.