Heating element and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016165667-A1
Application number	US-201514842428-A
Country	US
Kind code	A1
Filing date	Sep 1, 2015
Priority date	Jun 13, 2008
Publication date	Jun 9, 2016
Grant date	—

Abstract

Provided are a heating element, which includes: a transparent substance; a conductive heating line that is provided on at least one side of the transparent substance; bus bars that is electrically connected to the conductive heating line; and a power portion that is connected to the bus bars, wherein 30% or more of the entire area of the transparent substance has a conductive heating line pattern in which, when the straight line that intersects the conductive heating line is drawn, a ratio (distance distribution ratio) of standard deviation in respects to an average value of distances between adjacent intersection points of the straight line and the conductive heating line is 5% or more, and a method for manufacturing the same.

First claim

1 . A heating element comprising a transparent substance; a conductive heating line that is provided on at least one side of the transparent substance; bus bars that is electrically connected to the conductive heating line; and a power portion that is connected to the bus bars, wherein 30% or more of the entire area of the transparent substance has a conductive heating line pattern in which, when a straight line that intersects the conductive heating line is drawn, a ratio (distance distribution ratio) of standard deviation in respects to an average value of distances between adjacent intersection points of the straight line and the conductive heating line is 5% or more.

2 . The heating element according to claim 1 , wherein the straight line that intersects the conductive heating line is a line in which the standard deviation of the distances between adjacent intersection points of the straight line and the conductive heating line is the smallest value.

3 . The heating element according to claim 1 , wherein the straight line that intersects the conductive heating line is a straight line that vertically extends in respects to the tangent line of any one point of the conductive heating line.

4 . The heating element according to claim 1 , wherein the straight line that intersects the conductive heating line has 80 or more intersection points of the straight line and the conductive heating line.

5 . The heating element according to claim 1 , wherein the ratio (distance distribution ratio) of standard deviation in respects to the average value of distances between adjacent intersection points of the straight line that intersects the conductive heating line and the conductive heating line is 20% or more.

6 . The heating element according to claim 1 , wherein the conductive heating line has a boundary type pattern of figures that form a Voronoi diagram.

7 . The heating element according to claim 1 , wherein in the conductive heating line, a line width is 100 micrometers or less, an interval between lines is 30 mm or less, and a height of the line from the surface of the transparent substance is in the range of 1 to 100 micrometers.

8 . The heating element according to claim 1 , wherein the other transparent substance is further provided on a side on which the conductive heating line of the transparent substance is provided.

9 . The heating element according to claim 1 , wherein the transmittance deviation in respects to a predetermined circle that has a diameter of 20 cm is 5% or less.

10 . The heating element according to claim 1 , wherein after heating, a standard deviation of the surface temperature of the transparent substance is within 20%.

11 . The heating element according to claim 1 , wherein the transparent substance is glass, plastic substrate or plastic film.

12 . The heating element according to claim 1 , wherein in the heating element, an opening ratio is 70% or more, a surface resistance is 5 ohm/square or less, and a heating amount is 100 to 500 W per m2.

13 . The heating element as set forth in claim 1 , wherein the heating element includes at least two areas that have different patterns that are configured by the conductive heating line.

14 . The heating element as set forth in claim 1 , wherein the heating element includes an area in which the conductive heating line is not formed.

15 . The heating element as set forth in claim 1 , wherein the conductive heating line is blackened.

16 . The heating element as set forth in claim 1 , wherein the heating element is for a front window of vehicles.

17 . The heating element as set forth in claim 1 , wherein the standard deviation value of the intensity of light for each 5° in a circumferential direction of the light source which is measured when the light emitted from the light source that is disposed at the distance of 7 m from the heating element passes through the heating element is 15 or less.

18 . The heating element as set forth in claim 1 , wherein the conductive heating line pattern has a form of lines linking vertexes with each other after a basic unit of a regular polygon is designated and positions of the vertexes of the polygon are randomly changed.

19 . The heating element as set forth in claim 18 , wherein the polygon has a triangle, a rectangle, a square, a direct hexagon, or a regular hexagon.

20 . The heating element as set forth in claim 18 , wherein the positions of the vertexes of the polygon are changed in a unit area, and the unit area has a circle form having the vertex of the polygon as a center and a length of any one side constituting the polygon as a diameter.

21 . A method for manufacturing a heating element, the method comprising:
forming a conductive heating line on a transparent substance; forming bus bars that is electrically connected to the conductive heating line; and forming a power portion that is connected to the bus bars, wherein, on 30% or more of the entire area of the transparent substance, the heating element is formed in a pattern in which, when a straight line that intersects the conductive heating line is drawn, a ratio (distance distribution ratio) of standard deviation in respects to an average value of distances between adjacent intersection points of the straight line and the conductive heating line is 5% or more.

22 . The method for manufacturing a heating element according to claim 21 , wherein the conductive heating line is formed by using a printing method, a photolithography method, a photography method, a method using a mask, a sputtering method, or an inkjet method.

23 . The method for manufacturing a heating element according to claim 21 , wherein in the conductive heating line, a line width is 100 micrometers or less, an interval between lines is 30 mm or less, and a height of the line from the surface of the transparent substance is in the range of 1 to 100 micrometers.

24 . A heating element comprising:
a transparent substance; a conductive heating line that is provided on at least one side of the transparent substance; bus bars that is electrically connected to the conductive heating line; and a power portion that is connected to the bus bars, wherein 30% or more of the entire area of the transparent substance has a conductive heating line pattern that is formed of closed figures where a distribution is continuous and a ratio (area distribution ratio) of a standard deviation in respects to an average value of areas of the closed figures is 5% or more.

25 . The heating element according to claim 24 , wherein 30% or more of the entire area of the transparent substance has a conductive heating line pattern that is formed of closed figures where a distribution is continuous and a ratio (area distribution ratio) of a standard deviation in respects to an average value of areas of the closed figures is 20% or more.

26 . The heating element according to claim 24 , wherein there are at least 100 closed figures.

27 . The heating element according to claim 24 , wherein the conductive heating line has a boundary type pattern of figures that form a Voronoi diagram.

28 . The heating element according to claim 24 , wherein the conductive heating line has a boundary type pattern of figures that are formed of at least one triangle that forms a Delaunay pattern.

29 . The heating element according to cla

Assignees

• Lg Chemical Ltd

Inventors

• Choi Hyeon
• Kim Su-Jin
• Hwang Ji-Young
• Oh Seung-Tae
• Kim Ki-Hwan
• Chun Sang-Ki
• Hong Young-Jun
• Hwang In-Seok
• Lee Dong-Wook

Classifications

• H05B3/145

  Carbon only, e.g. carbon black, graphite · CPC title

• H05B2203/013

  Heaters using resistive films or coatings · CPC title

• H05B3/10

  Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor · CPC title

• H05B2203/008

  with layout including a portion free of resistive material, e.g. communication window · CPC title

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title