# US 2013/0153559 A1 · Heating element and a production method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153559 A1 - Document ID: US20130153559A1 - Status: Published application - Kind: A1 - Application number: 13/820,446 - Filed: 2012-01-13 - Published: 2013-06-20 - Earliest claimed: 2011-01-13 - Assignees: LG Chem, Ltd. - Inventors: Hyeon Choi; Su-Jin Kim; Ki-Hwan Kim; Young-Jun Hong - Web page: https://patentgrep.com/patent/US20130153559A1 ## CPC - H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields - H01R 43/00: Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors (of trolley lines B60M1/28) - H05B 3/265: {the insulating base being an inorganic material, e.g. ceramic (H05B3/262 takes precedence)} - H05B 2203/002: Heaters using a particular layout for the resistive material or resistive elements - H05B 2203/005: using multiple resistive elements or resistive zones isolated from each other - H05B 2203/011: Heaters using laterally extending conductive material as connecting means - H05B 2203/017: Manufacturing methods or apparatus for heaters - H05B 2203/037: Heaters with zones of different power density - Y10T 29/49208: by assembling plural parts - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention relates to a heating element comprising: two or more heating units comprising two busbars and a conductive heating means electrically connected to the two busbars, in which the busbars of the heating units are connected with each other in series and power per unit area of each of the heating units in the heating element decreases as a length of the busbar increases, and a method of preparing the same. ## Claims ### Claim 1 A heating element, comprising: two or more heating units comprising two busbars and a conductive heating means electrically connected to the two busbars, wherein the busbars of the heating units are connected with each other in series and power per unit area of each of the heating units in the heating element decreases as a length of the busbar increases. ### Claim 2 (depends on 1) The heating element according to claim 1, wherein the power per unit area of each of the heating units in the heating element has no correlation with a gap between the two busbars in each of the heating units. ### Claim 3 (depends on 1) The heating element according to claim 1, wherein the gap between the two busbars in the heating unit is fixed in the heating element and the power per unit area of each of the heating units decreases as a length of the busbar increases. ### Claim 4 (depends on 1) The heating element according to claim 1, wherein the length of the busbar of the heating unit is fixed in the heating element and the power per unit area of each of the heating units has no correlation with a gap between the two busbars in each of the heating units. ### Claim 5 (depends on 1) The heating element according to claim 1, wherein the gap between the heating units is 2 cm or less. ### Claim 6 (depends on 1) The heating element according to claim 1, wherein the conductive heating means is a conductive heating surface or a conductive heating line. ### Claim 7 (depends on 1) The heating element according to claim 1, wherein a temperature deviation in the heating unit is within 20% and a sheet resistance or a transmittance deviation between the heating units is within 20%. ### Claim 8 (depends on 1) The heating element according to claim 1, wherein the lengths of the busbars of at least two heating units among the heating units are different from each other. ### Claim 9 (depends on 1) The heating element according to claim 1, wherein the heating values of at least two heating units among the heating units are different from each other. ### Claim 10 (depends on 6) The heating element according to claim 6, wherein the conductive heating line is disposed so as to have an irregular pattern. ### Claim 11 (depends on 10) The heating element according to claim 10, wherein the irregular pattern comprises a boundary form of figures forming a Voronoi diagram or a boundary form of figures configured by at least one triangle forming a Delaunay pattern. ### Claim 12 (depends on 1) The heating element according to claim 1, wherein the heating element comprises a transparent substrate with the busbar and the conductive heating means. ### Claim 13 (depends on 12) The heating element according to claim 12, wherein the heating element further comprises a transparent substrate disposed on the surface with the busbar and the conductive heating means of the transparent substrate. ### Claim 14 (depends on 6) The heating element according to claim 6, wherein the conductive heating line is a metallic line. ### Claim 15 (depends on 6) The heating element according to claim 6, wherein the line width of the conductive heating line is 100 micrometers or less, the distance between the lines is 30 mm or less, and the line height is 100 micrometers or less. ### Claim 16 (depends on 6) The heating element according to claim 6, wherein the conductive heating surface is a film made of a transparent conductive material or a thin film made of an opaque conductive material. ### Claim 17 (depends on 1) The heating element according to claim 1, wherein at least one busbar of at least one of the heating units is diagonally disposed and the conductive heating means of the heating unit comprises a current-shorted portion. ### Claim 18 (depends on 1) The heating element according to claim 1, further comprising: a power supply unit. ### Claim 19 A method of preparing a heating element, comprising: forming two or more heating units comprising two busbars and a conductive heating line electrically connected to the two busbars on a transparent substrate; and connecting the busbars of the heating units in series, wherein power per unit area of each of the heating units in the heating element decreases as a length of the busbar increases. ### Claim 20 (depends on 19) The method of preparing a heating element according to claim 19, further comprising: adhering an additional transparent substrate on the surface with the busbar and the conductive heating line. ### Claim 21 (depends on 1) A heating element for a vehicle or architecture comprising the heating element of claim 1. ### Claim 22 (depends on 1) A display device comprising the heating element of claim 1. ### Claim 23 (depends on 22) The display device according to claim 22, further comprising: a surface temperature controller. ### Claim 24 (depends on 21) The display device according to claim 21, wherein the display device is a 3D display device.