KR101480160B1 - Heating sheet using printed electrode - Google Patents

Abstract

The purpose of the present invention is to provide a heating sheet using a printed electrode which is a fin film and has high flexibility. A heating sheet using a printed electrode according to an embodiment of the present invention includes a flexible thin film having an electrode pattern, a conductive printed electrode having the electrode pattern, a protection film which is attached to the flexible thin film and covers the printed electrode, and a power terminal which is connected to the printed electrode, is exposed to the attached flexible thin film and one side of the protection film, and is connected to an external power source.

Description

[0001] HEATING SHEET USING PRINTED ELECTRODE [0002]

The present invention relates to a heat generating sheet, and more particularly, to a heat generating sheet using a flexible printing electrode.

Japanese Patent No. 3089415 (registered on July 21, 2000) discloses a sheet-shaped surface heating element and a surface heating device. The sheet-like surface heating element is formed by adhering the outer peripheral portion of the insulating film forming the front surface and the back surface.

The sheet-like surface heating element is formed by providing a conductive trunk and a branch wire inside the insulating film to be bonded and connecting the power-feeding portion, connecting a current circuit to the power-feeding portion, and providing a heating surface.

This sheet-like surface heating element has a structure that is limited to floor heating, has extremely limited flexibility, and is difficult to be formed into a thin film.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat generating sheet using a printing electrode formed of a thin film and having high flexibility.

A heating sheet using a printing electrode according to an embodiment of the present invention includes a flexible thin film forming an electrode pattern, a conductive printing electrode provided on the electrode pattern, a protective film attached to the flexible thin film to cover the printing electrode, And a power terminal connected to the printing electrode and connected to an external power source by being drawn out to one side of the flexible film film and the protection film.

The printing electrode may be formed by filling the electrode pattern with a conductive material to form the same plane as the surface of the flexible thin film.

Wherein the printing electrode comprises a first electrode extending in a first direction and spaced apart in a second direction intersecting the first direction and a second electrode extending in the second direction and spaced apart in the first direction to cross the first electrode And a second electrode.

The printing electrodes may further include terminal electrodes spaced apart from each other in parallel to the second electrodes at both sides in the first direction and connected to the power supply terminals.

Wherein the first electrode and the second electrode form a rectangular pattern and the rectangular pattern forms a distance L in the first direction and a width W in the second direction, (T) in one direction and in the second direction.

The distance L is set to 3 to 10 mm, the width W is set to 4 to 10 mm, and the line width t is set to 0.5 to 2 mm. .

The printing electrode may be formed of a roll imprint.

The printed electrode may be filled with a conductive material in the electrode pattern and protrude higher than the surface of the flexible thin film.

The protective film has a corresponding pattern corresponding to the electrode pattern, and the corresponding pattern can accommodate the printing electrode protruding to the surface of the flexible thin film.

The printing electrode may be formed of one of a roll printing, a screen printing, and an ink jet.

Wherein the first electrode and the second electrode form a rectangular pattern and the second electrodes are arranged at a second gap larger than the first gap and the first gap, Can be alternately arranged at intervals.

The line width of the first electrode may be equal to the sum of the line widths of the one pair of the second electrodes.

In one embodiment of the present invention, a conductive printing electrode is provided between a flexible thin film and a protective film, which are attached to each other, and heat is generated in the printing electrode by connecting an external power source to a power terminal connected to the printing electrode.

In addition, the heat generating sheet of one embodiment is formed into a thin film by forming a body with a flexible thin film and a protective film, and can have high flexibility. Therefore, the heat generating sheet of one embodiment can be used for various purposes.

1 is a plan view of a heating sheet using a printing electrode according to a first embodiment of the present invention.
2 is a cross-sectional view of a flexible thin film in which a printing electrode is formed during a process of manufacturing a heating sheet using the printing electrode according to the first embodiment of the present invention.
3 is a cross-sectional view of a protective film attached to a printing electrode and a flexible thin film.
Fig. 4 is an enlarged view of the printing electrode of Fig. 1. Fig.
5 is a cross-sectional view of a flexible thin film in which a printing electrode is formed during a process of manufacturing a heating sheet using a printing electrode according to a second embodiment of the present invention.
6 is a cross-sectional view of a protective film attached to the printing electrode and the flexible thin film of FIG.
7 is a plan view of a heating sheet using a printing electrode according to a third embodiment of the present invention.
Fig. 8 is an enlarged view of the printing electrode of Fig. 7. Fig.
9 to 13 are partial plan views of a heating sheet using printing electrodes according to fourth to eighth embodiments of the present invention.
14 to 16 are partial plan views of a heating sheet using printing electrodes according to ninth to eleventh embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a plan view of a heating sheet using a printing electrode according to a first embodiment of the present invention. 1, a heating sheet 1 using a printing electrode according to the first embodiment comprises a flexible thin film 10 and a protective film 20 adhered to each other and a protective film 20 provided between the two films 10 and 20 And a power terminal 40 connected to the printing electrode 30 and drawn to the outside of the two films 10 and 20.

FIG. 2 is a cross-sectional view in which a printing electrode is formed on a flexible thin film in a process of manufacturing a heating sheet using the printing electrode according to the first embodiment of the present invention. FIG. 3 is a cross- Sectional view.

2 and 3, in the heating sheet 1 (hereinafter, referred to as a "heating sheet") using the printing electrode according to the first embodiment, the flexible thin film 10, together with the protective film 20, Thereby forming the body of the sheet 1 and enabling the printing electrode 30 to be formed by a roll imprint method. That is, the flexible thin film 10 has the electrode pattern 11 formed concavely by the imprint roll performing the roll imprint method.

For example, the flexible thin film 10 may be formed of polycarbonate (PC), polyethylene terephthalate (PET), or polyethylene naphthalate (PEN).

The printing electrode 30 is formed by filling the electrode pattern 11 with a conductive material. That is, the printed electrode 30 may be formed of an embeded metal electrode that is sandwiched by the electrode pattern 11 of the flexible thin film 10.

At this time, the printing electrode 30 is filled in the electrode pattern 11 to form the same plane as the surface of the flexible thin film 10. Therefore, the protective film 20 can be firmly attached to the surface of the flexible thin film 10 and the printing electrode 30.

Referring again to FIG. 1, the printing electrode 30 includes a first electrode 31 extending in a first direction (x-axis direction) and spaced in a second direction (y-axis direction) And a second electrode 32 extending in the second direction and spaced apart in the first direction so as to intersect the first electrode 31. The plurality of first electrodes 31 and the plurality of second electrodes 32 form a heating portion H in a rectangular or mesh pattern between the flexible thin film 10 and the protective film 20 attached to each other .

The printed electrodes 30 may further include terminal electrodes 33 disposed on both sides of the first direction (x-axis direction) and spaced apart from the second electrodes 32 to be connected to the power supply terminal 40. The plurality of second electrodes 32 and the plurality of terminal electrodes 33 form a power supply part P in a rectangular pattern between the flexible thin film 10 and the protective film 20 on both sides in the x-

The rectangles formed by the second electrodes 32 and the terminal electrodes 33 in the power supply part P on both sides in the x-axis direction are formed in a rectangular parallelepiped shape in the heat generating part H disposed between the two power supply parts P, Axis direction is set smaller than the rectangle formed by the electrodes 31 and the second electrodes 32.

Accordingly, power applied to the terminal electrodes 33 connected to the power terminal 40 can be uniformly supplied to the first electrodes 31 arranged in the y-axis direction. The power supply terminal 40 may be connected to an AC power source.

Fig. 4 is an enlarged view of the printing electrode of Fig. 1. Fig. Referring to FIG. 4, the first electrode 31 and the second electrode 32 efficiently generate heat in the heating portion H having a rectangular pattern.

The rectangular pattern of the first electrode 31 and the second electrode 32 provided in the heat generating portion H forms the distance L in the first direction (x axis direction) and the second direction (y axis direction) And forms a line width t in each of the first direction and the second direction.

The distance L is set between the neighboring second electrodes 32 and the width W is set between the neighboring first electrodes 31. [ For convenience, the line width t is set to be the same in the first electrode 31 and the second electrode 32.

For example, the printing electrode 30, that is, the first electrode 31 and the second electrode 32 are formed of silver (Ag). The distance L is set to 3 to 10 mm in the rectangular pattern of the first electrode 31 and the second electrode 32 of the heat generating portion H and the width W is set to 4 to 10 mm, t may be set to 0.5 to 2 mm.

If the distance L is more than 10 mm, the calorific power decreases. If the distance L is less than 3 mm, the power consumption increases. If the width W is larger than 10 mm, the amount of heat generated is lowered. If the width W is less than 4 mm, the power consumption is increased. If the line width t exceeds 2 mm, the power consumption increases. If the line width t is less than 0.5, the calorific power decreases.

For example, in a rectangular pattern of the first electrode 31 and the second electrode 32 of the heat generating portion H, the distance L is set to 5.2 mm, the width W is set to 6 mm, (t) may be set to 1 mm.

In this case, the flexible thin film film 10 and the protective film 20 made of a thermosetting film and a thermoplastic film (for example, polycarbonate (PC), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) 31 and the second electrode 32, the shape can be maintained.

The electrode pattern 11 and the printing electrode 30 can be formed into various shapes on the flexible thin film 10. The pattern width (the width W of the printing electrode), the pattern distance (the distance L of the printing electrode), the pattern line width (the line width t of the printing electrode) And the pattern depth (D, the thickness of the printing electrode) can be made constant, and the pattern width, pattern distance, pattern line width, and pattern depth D can be set variously.

A variety of printing electrodes 30 are formed on the electrode patterns 11 of various width, distance, line width, and depth (D). Therefore, the width W, the distance L, the line width t and the thickness of the printing electrode 30 can be set variously. Thus, the printing electrode 30 can obtain the calorific value set at the set power.

For example, since the printing electrode 30 is formed of Ag having a high resistance value and the neighboring printing electrode 30 is insulated by the electrode pattern 11 of the flexible thin film 10, Can be prevented.

Referring again to FIG. 3, the protective film 20 is attached to the flexible thin film 10 housing the printing electrode 30, thereby covering the printing electrode 30. That is, the printing electrode 30 is disposed in a sealing structure inside the protective film 20 and the flexible thin film 10 to be attached to each other.

The protective film 20 can be formed of the same material as the flexible thin film 10 and can increase mutual adhesion. The protective film 20 and the flexible thin film 10 may be adhered to each other by thermal welding or adhesives (not shown).

The flexible thin film (10) forms the electrode pattern (11) in the thickness direction, and the printed electrode (30) is embedded therein. Therefore, the protective film 20 may be formed to be thinner than the thickness of the flexible thin film 10.

Since the heating sheet 1 of the first embodiment is formed entirely as a thin film and has flexibility, the heating sheet 1 may be used as a single piece or in a rolled state or may be attached to a wall or a window of a building using an adhesive member to be used as a surface heating element.

Hereinafter, various embodiments of the present invention will be described. The description of the same configuration as that of the first embodiment and the previously described embodiments will be omitted and different configurations will be described.

FIG. 5 is a cross-sectional view of a flexible thin film in which a printing electrode is formed in a process of manufacturing a heating sheet using a printing electrode according to a second embodiment of the present invention. FIG. 6 is a cross- Fig.

5 and 6, in the heating sheet 2 of the second embodiment, the printing electrode 230 is filled with a conductive material in the electrode pattern 211 and is formed so as to protrude higher than the surface of the flexible thin film 210 .

The depth D2 of the electrode pattern 211 formed on the flexible thin film 210 of the second embodiment is the same as the depth D2 of the electrode pattern 211 of the second embodiment when the thickness of the printing electrode 30 of the first embodiment is the same as the thickness of the printing electrode 230 of the second embodiment. May be formed shallower than the depth D of the electrode pattern 11 in the first embodiment.

Accordingly, the flexible thin film 210 of the second embodiment can be formed to be thinner than the flexible thin film 10 of the first embodiment. The thickness of the protective film 220 of the second embodiment is greater than the thickness of the protective film 20 of the first embodiment when the thickness of the printing electrode 30 of the first embodiment is the same as the thickness of the printing electrode 230 of the second embodiment It can be formed thicker.

The protective film 220 has a corresponding pattern 221 corresponding to the electrode pattern 211. The corresponding pattern 221 accommodates the printing electrode 230 protruding to the surface of the flexible thin film 210.

That is, the printing electrode 230 is accommodated in the electrode pattern 211 of the flexible thin film 210 on one side, and is accommodated in the corresponding pattern 221 of the protective film 220 on the other side.

The printing electrode 230 may be formed by a roll printing, a screen printing, or an inkjet method on the electrode pattern 211 as a conductive material. Roll printing methods include gravure, gravure offset and flexographic methods.

FIG. 7 is a plan view of a heating sheet using a printing electrode according to a third embodiment of the present invention, and FIG. 8 is an enlarged view of the printing electrode of FIG. 7 and 8, the printing electrode 330 of the heating sheet 3 according to the third embodiment includes a flexible thin film 310 to be attached to each other and a first electrode (331) and a second electrode (332).

The first electrode 331 and the second electrode 332 provided in the heat generating portion H3 are arranged in a crossing manner in the x and y axis directions to form a rectangular pattern. In the rectangular pattern of the first electrode 331 and the second electrode 332, the first electrodes 331 form a width W in the y-axis direction.

the second electrodes 332 in the x-axis direction are arranged at a first gap G1 adjacent to the first gap G1 and a second gap G2 greater than the first gap G1, G2). The line width t1 of the first electrode 331 is equal to the sum of the line width t2 of the pair of second electrodes 332 (t1 = t2 + t2).

Since the second electrodes 332 are disposed at the second gap G2 and are arranged at the first gap G1 at the same time, even when the line width t2 of the second electrode 332 is reduced, (Not shown).

The rectangles formed by the second electrodes 332 and the terminal electrodes 333 in the power supply part P3 on both sides in the x axis direction are connected to the first power supply part P3 in the heating part H3 disposed between the two power supply parts P3, Axis direction is set smaller than the rectangle formed by the electrodes 331 and the second electrodes 332. [

Therefore, the power applied to the terminal electrodes 333 connected to the power terminal 340 can be uniformly supplied to the first electrodes 331 spaced apart in the y-axis direction. Since the terminal electrode 333 of the third embodiment is formed in a larger number than the terminal electrode 33 of the first embodiment, even when the length of the first electrode 331 is longer than that of the first electrode 31 of the first embodiment The power can be supplied stably.

For example, the printing electrode 330, that is, the first electrode 331 and the second electrode 332 may be formed of carbon (C). That is, the printing electrode 330 can be formed by printing or injecting carbon ink onto the electrode pattern 211 by a roll printing, screen printing or ink jet method.

The first and second spacings G1 and G2 are set to 1 mm and 5.2 mm respectively in the rectangular pattern of the first electrode 331 and the second electrode 332 of the heat generating portion H3, And line widths t1 and t2 of the first and second electrodes 331 and 332 may be set to 1 mm and 0.5 mm, respectively.

Table 1 shows resistance values and power consumption values of the printing electrodes 330 according to Experimental Examples 1 to 3 according to the third embodiment.

Heating sheet
Length * Width (mm) Flexible thin film
Thickness (mm) Of the printing electrode
Resistance (Ω) Power consumption (W) Experimental Example 1 150 * 524 One 244.4 198 Experimental Example 2 400 * 524 One 91.7 528 Experimental Example 3 800 * 524 One 45.8 1,056

The first and second electrodes 331 and 332 and the terminal electrode 333 are formed of urethane resin in the first and second embodiments. Carbon (C).

When the width Ws (the size in the y-axis direction) of the heat generating sheet 3 is constant at 524 mm and the length Ls (size in the x-axis direction) of the heat generating sheet 3 increases to 150, 400 and 800 mm, The resistance value of the electrode 330 decreases to 224.4, 91.7 and 45.8 ?, and the power consumption value increases to 198, 528, and 1056 W, respectively.

In order to keep the power consumption at 528 W or lower in the heat generating sheet 3, the resistance of the printing electrode 330 should be maintained at 91.7? Or higher. For this purpose, it is necessary that the width Ws of the heat generating sheet 3 is 524 mm and the length Ls is 400 mm or less.

Various electrode patterns and printing electrodes of the present invention will be described below. For the sake of convenience, the following description will be made with reference to the plan view, and therefore, the electrode pattern is omitted and is described as a printing electrode.

9 to 13 are partial plan views of a heating sheet using printing electrodes according to fourth to eighth embodiments of the present invention. Referring to Fig. 9, the heating sheet 4 of the fourth embodiment forms the printing electrodes 430 in a circular pattern. Referring to Fig. 10, the heating sheet 5 of the fifth embodiment includes the printing electrodes 530 It is formed in a triangular pattern.

Referring to Fig. 11, the heating sheet 6 of the sixth embodiment is formed of a honeycomb pattern in which the printing electrodes 630 are formed. Referring to Fig. 12, the heating sheet 7 of the seventh embodiment includes the printing electrodes 730, Referring to Fig. 13, the heating sheet 8 of the eighth embodiment forms a printing electrode 830 in a cross pattern.

The fourth to eighth embodiments illustrate that the heating electrodes can be formed in various patterns in the heating sheet.

Figs. 14 to 16 are partial plan views of a heating sheet using printing electrodes according to ninth to eleventh embodiments of the present invention. Fig. 14, a heating sheet 511 according to a ninth embodiment of the present invention includes a circular printing electrode 513 printed using a circular stamp mold provided in a roll printing (a) (512) includes a circular printing electrode 514 that is roll imprinted by an imprint roll (b).

Referring to FIG. 15, a heating sheet 521 according to a tenth embodiment of the present invention includes a triangular printing electrode 523 printed using a triangular stamp mold provided for roll printing (a) (B) includes a triangular printing electrode 524 that is roll-imprinted by an imprint roll.

Referring to FIG. 16, a heating sheet 531 according to an eleventh embodiment of the present invention includes a honeycomb-shaped printing electrode 533 printed using a honeycomb stamp mold provided for roll printing, The heating sheet 532 includes a honeycomb-shaped printing electrode 534 roll-imprinted by an imprint roll.

The ninth through eleventh embodiments illustrate that a printing electrode of the same shape can be formed by a printing method (roll printing, screen printing and inkjet) and a roll imprinting method in the heat generating sheet.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1, 2, 3, 4, 5, 6, 7, 8, 511, 512, 521, 522, 531, 532:
30, 230, 330, 430, 530, 630, 730, 513, 514, 523, 524, 533,
10, 210, 310: flexible thin film 11, 211: electrode pattern
20, 220, 320: protective film 31, 331: first electrode
32, 332: second electrode 33, 333: terminal electrode
40, 340: Power terminal 221: Corresponding pattern
D, D2: depth G1, G2: first and second spacing
H, H3: Heat generating part L: Distance
Ls: Length of heating sheet P, P3: Power supply
t, t1, t2: Line width W: Width
Ws: Width of heating sheet

Claims (12)

A flexible thin film for forming an electrode pattern;
A conductive printing electrode provided on the electrode pattern;
A protective film attached to the flexible thin film to cover the printing electrode; And
A flexible thin film film connected to the printing electrode and a power supply terminal connected to an external power source,
/ RTI >
The printing electrode
And a plurality of terminal electrodes which are provided on both sides of the power terminal to be connected to the power terminal, the terminal electrodes being spaced apart from each other.
The method according to claim 1,
The printing electrode includes:
The electrode pattern is filled with a conductive material to form the same plane as the surface of the flexible thin film
A heating sheet using a printing electrode.
The method according to claim 1,
The printing electrode includes:
A first electrode extending in a first direction and spaced apart in a second direction intersecting the first direction,
A second electrode extending in the second direction and spaced apart in the first direction so as to cross the first electrode,
Wherein the heat generating sheet is a heat generating sheet.
The method of claim 3,
The terminal electrode
Wherein the heating electrodes are arranged on both sides of the first direction in parallel with the second electrodes.
The method of claim 3,
Wherein the first electrode and the second electrode are made of a metal,
Forming a rectangular pattern,
In the rectangular pattern,
Forming a distance L in the first direction and forming a width W in the second direction and forming a line width t in the first direction and the second direction
A heating sheet using a printing electrode.
6. The method of claim 5,
The printing electrode is formed of silver (Ag)
The distance L is set to 3 to 10 mm,
The width W is set to 4 to 10 mm,
The line width t is set to 0.5 to 2 mm
A heating sheet using a printing electrode.
The method according to claim 1,
The printing electrode
A heating sheet using a printing electrode formed of a roll imprint.
A flexible thin film for forming an electrode pattern;
A conductive printing electrode provided on the electrode pattern;
A protective film attached to the flexible thin film to cover the printing electrode; And
A flexible thin film film connected to the printing electrode and a power supply terminal connected to an external power source,
/ RTI >
The printing electrode includes:
The electrode pattern is filled with a conductive material and protruded higher than the surface of the flexible thin film
A heating sheet using a printing electrode.
9. The method of claim 8,
The above-
A corresponding pattern corresponding to the electrode pattern is provided
The corresponding pattern may be,
Wherein the flexible thin film film is formed on a surface of the flexible thin film
A heating sheet using a printing electrode.
9. The method of claim 8,
The printing electrode includes:
A heating sheet using a printing electrode formed by one of roll printing, screen printing and ink jet.
The method of claim 3,
Wherein the first electrode and the second electrode are made of a metal,
Forming a rectangular pattern,
Wherein the second electrodes comprise:
Are arranged at adjacent first intervals and at a second interval larger than the first interval and alternately arranged at the first interval and the second interval
A heating sheet using a printing electrode.
12. The method of claim 11,
The line width of the first electrode
Wherein the first electrode and the second electrode overlap each other.

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