# US 7,745,983 B2 · Field emission plane light source and method for making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,983 B2 - Document ID: US7745983B2 - Status: Granted - Kind: B2 - Application number: 11/603,639 - Filed: 2006-11-21 - Published: 2007-09-27 - Granted: 2010-06-29 - Earliest claimed: 2006-03-24 - Assignees: Tsinghua University; Hon Hai Precision Industry Co., Ltd. - Inventors: Li Qian; Liang Liu; Peng Liu; Jie Tang; Yang Wei; Shou-Shan Fan - Web page: https://patentgrep.com/patent/US7745983B2 ## CPC - H01J 63/06: Lamps with luminescent screen excited by the ray or stream - B82Y 10/00: Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic - H01J 1/3048: {Distributed particle emitters} - H01J 7/183: {Composition or manufacture of getters} - H01J 9/025: {of field emission cathodes} - H01J 31/127: {using large area or array sources, i.e. essentially a source for each pixel group} - H01J 2201/30469: Carbon nanotubes (CNTs) - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES ## Abstract A field emission plane light source generally incorporates an anode and a cathode. The anode includes an anode substrate, an anode conductive layer formed on a surface of the anode substrate, and a fluorescent layer formed on the anode conductive layer. The cathode includes a cathode substrate facing and separated from the anode substrate, a cathode conductive layer formed on a surface of the cathode substrate, and an electron emission layer formed on the cathode conductive layer and facing the fluorescent layer of the anode. The cathode and anode substrates have a seal formed therebetween. The electron emission layer includes a glass matrix and a plurality of carbon nanotubes, metallic conductive particles and getter powders dispersed therein. A method for making such field emission plane light source is also provided. ## Claims ### Claim 1 A field emission plane light source comprising: an anode comprising an anode substrate, an anode conductive layer formed on a surface of the anode substrate, and a fluorescent layer formed on the anode conductive layer; and a cathode comprising a cathode substrate facing and separated from the anode substrate, a cathode conductive layer formed on a surface of the cathode substrate, and an electron emission layer formed on the cathode conductive layer and facing the fluorescent layer of the anode; the cathode and anode substrates forming a sealed chamber therebetween; and the electron emission layer comprising a glass matrix and a plurality of carbon nanotubes, metallic conductive particles electrically connecting the cathode conductive layer with the carbon nanotubes, and getter powders dispersed within the glass matrix. ### Claim 2 (depends on 1) The field emission plane light source as described in claim 1, wherein the getter powders are made of a non-evaporating getter material. ### Claim 3 (depends on 2) The field emission plane light source as described in claim 2, wherein an average diameter of the getter powders is in the range from about 1 micrometer to about 10 micrometers. ### Claim 4 (depends on 1) The field emission plane light source as described in claim 1, wherein the getter powders are comprised of a material selected from the group consisting of titanium, zirconium, hafnium, thorium, aluminum, thulium, and alloys composed of at least two such metals. ### Claim 5 (depends on 1) The field emission plane light source as described in claim 1, wherein an average diameter of the nanotubes is in the range from about 1 nanometer to about 100 nanometers, and an average length thereof is in the range from about 5 micrometers to about 15 micrometers. ### Claim 6 (depends on 1) The field emission plane light source as described in claim 1, wherein the anode conductive layer is an indium tin oxide film. ### Claim 7 (depends on 1) The field emission plane light source as described in claim 1, wherein the metallic conductive particles are made of a material selected from indium tin oxide and silver, and an average diameter thereof is in the range of about 0.1 micrometer to about 10 micrometers. ### Claim 8 (depends on 1) The field emission plane light source as described in claim 1, wherein an aluminum film is formed on the fluorescent layer of the anode. ### Claim 9 (depends on 1) The field emission plane light source as described in claim 1, wherein the cathode conductive layer is comprised of at least one material selected from the group consisting of indium tin oxide, silicon, silver, copper, nickel, and gold and an alloy composed by at least two such metals. ### Claim 10 (depends on 1) The field emission plane light source as described in claim 1, wherein at least one of the anode substrate and the cathode substrate is a transparent glass plate. ### Claim 11 (depends on 2) The field emission plane light source as described in claim 2, wherein the non-evaporating getter material has an activity temperature of about 300° C. to about 500° C. ### Claim 12 (depends on 1) The field emission plane light source as described in claim 1, wherein ends of at least some of the carbon nanotubes are exposed out of the top surface of the electron emission layer. ### Claim 13 (depends on 1) The field emission plane light source as described in claim 1, further comprising a sealing body for sealing edges of the field emission plane light source to thereby form a sealed chamber in an inner portion thereof. ### Claim 14 (depends on 13) The field emission plane light source as described in claim 13, wherein the material of the sealing body is glass with a melting temperature of about 350° C. to about 600° C. ### Claim 15 (depends on 1) The field emission plane light source as described in claim 1, wherein the electron emission layer has an uninterrupted top surface facing the fluorescent layer.