Heating element and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9624126-B2
Application number	US-93460709-A
Country	US
Kind code	B2
Filing date	Mar 17, 2009
Priority date	Jun 13, 2008
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

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 2% or more, and a method for manufacturing the same.

First claim

The invention claimed is:

1. A heating element comprising
a transparent substance;
a plurality of conductive heating lines provided in a pattern on at least one side of the transparent substance, the pattern covering 90% or more of the entire area of the transparent substance and forming a boundary of figures that form a Voronoi diagram such that an average distance between adjacent intersection points on a straight line intersecting—a single conductive heating line at least at 80 points has a standard deviation of between 20% and 100%; and
bus bars that are electrically connected to the plurality of conductive heating lines,
wherein the plurality of conductive heating lines minimize diffraction and interference such that a light intensity, which is measured when the light emitted from a light source that is disposed at a distance of 7 m from the heating element passes through the heating element for every 5° in a circumferential direction of the light source, has a maximum standard deviation of 15,
wherein the plurality of conductive heating lines minimize diffraction and interference such that a light transmittance of the heating element with respect to a predetermined circle that has a diameter of 20 cm has a maximum standard deviation of 5%,
wherein the conductive heating lines are provided at an interval of 50 micrometers to 0.65 mm,
wherein a line width of the plurality of conductive heating lines is between 5 micrometers to 100 micrometers, and a height of the plurality of conductive heating lines from the surface of the transparent substance is in the range of 1 to 100 micrometers, and
wherein an opening ratio of the plurality of conductive heating lines is 70% or more, the opening ratio being the ratio of an area of the transparent substance that is not covered with the pattern or irregularly distributed closed figures divided by the overall area, and
wherein the plurality of conductive heating lines forming a pattern of irregularly distributed closed figures are configured to have a surface resistance of 5 ohm/square or less, and a heating amount of 100 to 500 W per m 2 .

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

3. The heating element according to claim 1 , wherein an additional transparent substance is further provided on a side on which the conductive heating lines of the transparent substance are provided.

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

5. The heating element as set forth in claim 1 , wherein the heating element includes an area in which the conductive heating lines are not formed.

6. The heating element as set forth in claim 1 , wherein the conductive heating lines are blackened.

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

8. The heating element according to claim 1 , further comprising a power portion connected to the bus bars.

Assignees

• 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
• 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

• H05B3/84

  Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields · CPC title

• C03C17/04 Primary

  by fritting glass powder · CPC title

• H05B2203/017

  Manufacturing methods or apparatus for heaters · CPC title

• C03C17/34 Primary

  with at least two coatings having different compositions (C03C17/44 takes precedence) · CPC title

• B60S1/02

  Cleaning windscreens, windows or optical devices {(wind deflectors specially adapted for preventing soiling of windows or windscreens B60J1/2002)} · CPC title