Heating element and a manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9247587-B2
Application number	US-201113821810-A
Country	US
Kind code	B2
Filing date	Sep 14, 2011
Priority date	Sep 14, 2010
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

The present invention relates to a heating element including a transparent substrate, a bus bar, a power supply connected to the bus bar, a heat emitting pattern line provided on the transparent substrate and electrically connected to the bus bar, and a non-heat emitting pattern line provided on the transparent substrate and not electrically connected to the bus bar, and a method for manufacturing the same.

First claim

The invention claimed is:

1. A heating element, comprising:
a transparent substrate;
two bus bars;
a plurality of heat emitting pattern lines provided on an upper-side of the transparent substrate and electrically connected to the bus bar, wherein at least one of the plurality of heat emitting pattern lines does not intersect with adjacent hear emitting pattern lines;
a plurality non-heat emitting pattern lines provided on an upper-side of the transparent substrate and not electrically connected to the bus bars; and
a plurality of heating units, each comprising an area bound by two adjacent heat emitting pattern lines and the bus bars, wherein the bus bars and the plurality of heat emitting pattern lines are positioned such that if there is a voltage difference between the bus bars, each heating unit has substantially the same value for the following Equation 1:

V
⨯
I

L
⨯
W

=

V
2

⨯

(

1
/
R

)

L
⨯
W

=

V
2

R
⨯
L
⨯
W

=

V
2

a
⁢

⁢

L
⨯
L
⨯
W

,

[

Equation
⁢

⁢
1

]

where W is a unit width, defined as an interval between a first heat emitting pattern line and an adiacent heat emitting pattern line, V is the voltage difference between the bus bars, I is a current applied to the first heat emitting pattern line, R is a resistance of the first heat emitting pattern line, L is a length of the first heat emitting pattern line, and a is a proportional constant value; and
wherein a line width of the heat emitting pattern line and the non-heat emitting pattern line is 100 μm or less, and
wherein at least one non-heat emitting pattern line is positioned within at least one heating unit of the plurality of heating units.

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

3. The heating element according to claim 1 , wherein lengths of the heat emitting pattern lines connected to the bus bar in the heating units are equal.

4. A method for manufacturing the heating element according to claim 1 , comprising:
simultaneously or separately forming two bus bars, the plurality of heat emitting pattern lines-electrically connected to the bus bars, and the plurality of non-heat emitting pattern lines not electrically connected to the bus bars on a transparent substrate.

5. The heating element according to claim 1 , wherein the heat emitting pattern lines and the non-heat emitting pattern lines are positioned in a Voronoi pattern or a Delaunay pattern.

6. A heating element, comprising:
a transparent substrate;
two bus bars;
a plurality of heat emitting pattern line provided on an upper-side of the transparent substrate and electrically connected to the bus bars, wherein at least one of the plurality of heat emitting pattern lines does not intersect with adjacent heat emitting pattern lines;
a plurality of non-heat emitting pattern lines provided on an upper-side of the transparent substrate and not electrically connected to the bus bars; and
a plurality of heating units, each comprising an area bound by two adjacent heat emitting pattern lines and the bus bars, wherein the bus bars and the plurality of heat emitting pattern lines are positioned such that if there is a voltage difference between the bus bars, each heating unit has substantially the same value for the following Equation 1:

V
×
I

L
×
W

=

V
2

×

(

1
/
R

)

L
×
W

=

V
2

R
×
L
×
W

=

Assignees

• Kim Ki-Hwan
• Hong Young-Jun
• Choi Hyeon
• Kim Su-Jin
• Lg Chemical Ltd

Inventors

• Kim Ki-Hwan
• Hong Young-Jun
• Choi Hyeon
• Kim Su-Jin

Classifications

• H05B3/84 Primary

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

• H05B2203/005

  using multiple resistive elements or resistive zones isolated from each other · CPC title

• H05B2203/011

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

• H01C17/00

  Apparatus or processes specially adapted for manufacturing resistors (providing fillings for housings or enclosures H01C1/02; reducing insulation surrounding a resistor to powder H01C1/03; manufacture of thermally variable resistors H01C7/02, H01C7/04) · CPC title

• Y10T29/49083

  Heater type · CPC title