摘要:
A field emission device includes a cathode and a carbon nanotube (CNT) gate electrode. The CNT gate electrode which is electrically insulated from the cathode includes a CNT layer and a dielectric layer. The CNT layer which has a surface includes a number of micropores. The dielectric layer is coated on the surface of the CNT layer and an inner wall of each of the micropores.
摘要:
A double-faced field emission display device includes two parallel fluorescent screens (10, 10′) and an electron emission structure (20) located between the fluorescent screens. Each fluorescent screen includes a transparent substrate (21, 21′) with an anode plate (12, 12′) and coplanar fluorescent layers (13, 13′) formed at an inner surface of the transparent substrate. The electron emission structure includes an opaque insulative substrate (28) with cathode plates (26, 26′), electron emitters (27, 27′) and grid plates (25, 25′) formed at each of opposite surfaces (281, 282) thereof. Symmetrically opposite pairs of same electrodes are electrically interconnected so that the fluorescent screens can simultaneous display a same image. Only a single driving system is needed to achieve the simultaneous display.
摘要:
A field emission lamp includes: a transparent bulb (10) having a neck portion; a lamp head mated with the neck portion; an anode layer (20) formed on an inner surface of the bulb; a fluorescence layer (30) formed on the anode layer; a cathode electrode (43) and an anode electrode (23) located at the lamp head; an anode down-lead ring (24) located at the neck portion, the anode down-lead ring engaging with the anode layer and electrically connecting with the anode electrode via an anode down-lead pole (21) and a pair of down-leads (22); and an electron emitting cathode positioned in the bulb and engaging with the cathode electrode. The field emission lamp is safe for humans and environmentally friendly, provides a high electrical energy utilization ratio, and has a reduced cost.
摘要:
A method for forming a patterned array of carbon nanotubes (11) includes the steps of: forming an array of carbon nanotubes on a substrate (10); imprinting the array of carbon nanotubes using a molding device (12) with a predetermined pattern; and removing the molding device, thereby leaving a patterned array of carbon nanotubes (13). The method can effectively reduce or even eliminate any shielding effect between adjacent carbon nanotubes, and is simple to implement. The field emission performance of the patterned array of carbon nanotubes is improved.
摘要:
A field emission electron source includes at least one electron emission member. Each electron emission member includes a conductive body and an electron emission layer formed on the conductive body. The conductive body has an upper portion. The electron emission layer is formed on, at least, the upper portion of the conductive body. The electron emission layer includes a glass matrix; and at least one carbon nanotube, and a plurality of metallic conductive particles and getter powders dispersed in the glass matrix. A method for making such field emission electron source is also provided.
摘要:
A preferred method for making a carbon nanotube-based field emission cathode device in accordance with the invention includes the following steps: preparing a solution having a solvent and a predetermined quantity of carbon nanotubes dispersed therein; providing a base with an electrode (101) formed thereon; forming a layer of conductive grease (102) on the base; distributing the solution on the layer of conductive grease to form a carbon nanotube layer (103) on the conductive grease; and scoring the layer of conductive grease, for separating first ends of at least some of the carbon nanotubes from the conductive grease for attaining effective carbon nanotube field emission cathode.
摘要:
A field emission lamp generally includes a tube having at least one open end, at least one sealing member respectively arranged in a corresponding open end of the tube, an anode, and a cathode. The anode includes an anode conductive layer formed on an inner surface of the tube, a fluorescent layer formed on the anode conductive layer, and at least one anode electrode electrically connected with the anode conductive layer and extending out of the at least one sealing member. The cathode includes an electron emission element and at least one cathode electrode electrically connected with the electron emission element and extending out of the at least one sealing member. The electron emission element has an electron emission layer. The electron emission layer includes getter powders therein to exhaust unwanted gas in the field emission lamp, thereby ensuring the field emission lamp with a high degree of vacuum during operation thereof. A method for making such field emission lamp is also provided.
摘要:
A light source apparatus (8) includes a rear plate (80), a front plate formed with an anode layer (82), and a cathode (81) interposed therebetween. The cathode includes a plurality of electrically conductive carriers (812) and a plurality of field emitters (816) formed thereon. The field emitters are uniformly distributed on anode-facing surfaces of the conductive carriers. Preferably, the field emitters extend radially outwardly from the corresponding conductive carriers. The conductive carriers are parallel with each other, and are located substantially on a common plane. Each of the conductive carriers can be connected with a pulling device arranged at least one end thereof, and an example of the pulling device is a spring. The conductive carriers may be cylindrical, prism-shaped or polyhedral.
摘要:
An exemplary electron emission device includes an electron emitter, an anode opposite to and spaced apart from the electron emitter, a first power supply circuit, and a second power supply circuit. The first power supply circuit is configured for electrically connecting the electron emitter and the anode with a power supply to generate an electric field between the electron emitter and the anode. The second power supply circuit is configured for electrically connecting the electron emitter with a power supply to supply a heating current for heating the electron emitter whereby electrons emit therefrom. Methods for generating an emission current with a relatively higher stability also are provided.
摘要:
A field emission device (10) includes a base (12), a conductive paste (16), and at least one carbon nanotube yarn (14). The at least one carbon nanotube yarn is attached to the base using the conductive paste. This avoids separation of the at least one carbon nanotube yarn from the base by electric field force in a strong electric field. A method for making the field emission device includes the steps of: (a) providing a base; (b) attaching at least one carbon nanotube yarn to the base using conductive paste; and (c) sintering the conductive paste to obtain the field emission device with the carbon nanotube yarn firmly attached to the base.