CN212752660U - Transparent heating film - Google Patents
Transparent heating film Download PDFInfo
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- CN212752660U CN212752660U CN202021835166.2U CN202021835166U CN212752660U CN 212752660 U CN212752660 U CN 212752660U CN 202021835166 U CN202021835166 U CN 202021835166U CN 212752660 U CN212752660 U CN 212752660U
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Abstract
The utility model discloses a transparent heating film contains: a transparent substrate with dielectric properties; a transparent resistance layer with one surface resistivity of 60-150 omega/sq, which is arranged on the base layer; an electrode layer having at least one electrode circuit pattern, wherein the electrode circuit pattern is formed by meshes interwoven by micron-sized conductive wires, and the mesh density is 1-25 mesh/mm2The electrode circuit pattern is electrically lapped on at least one local area of the resistance layer; and the protective layer is a transparent material thin layer with dielectric property, and the protective layer completely covers the area range containing the resistance layer and the electrode layer. The utility model discloses a transparent heating film has full area and evenly heaies up and quick defogging is imitatedThe heating value of the local area of the heating film can be adjusted arbitrarily according to the use requirement.
Description
Technical Field
The utility model relates to a film that generates heat especially indicates a transparent heating film that can be applied to car windshield defogging.
Background
Because the temperature difference can cause the moisture to condense on the surface of the automobile windshield, the vision of a driver is blocked, and the driving safety is endangered, so that the automobile windshield is provided with the demister to eliminate the mist on the windshield; the existing demister for the automobile mainly attaches a plurality of demisting lines made of metal materials to the windshield of the automobile, and the demisting lines are arranged in parallel, and when the demister is electrified, the demisting lines generate an electric-heat conversion effect by means of the resistance of the demisting lines so as to heat the windshield of the automobile and dissipate fog attached to the windshield; however, when the conventional defogger is operated, the heating area is concentrated near the defogging lines, and other positions where the defogging lines are not attached need to be heated by means of heat conduction, so that the time required for defogging is prolonged, and the condition of uneven heat distribution can cause the windshield to generate internal stress, which easily causes the glass to break after long-term repeated operation, thus endangering driving safety. Moreover, the defogging line of traditional defroster is made by opaque metal material, consequently attaches many defogging lines on windshield, not only has the harmful effect to pleasing to the eye, also can cause the hindrance to driver's the field of vision, unfavorable driving safety.
In order to solve the problems of visual field obstruction and poor beauty caused by the traditional defogging lines installed on the windshield, the prior industry replaces the defogging lines made of metal materials with transparent ITO conductive strips, however, most of the ITO conductive strips are used as heating sources, although the problem of the visibility of the windshield can be effectively overcome, the phenomenon of uneven distribution of temperature rise effect in the heating process and the defect of long defogging time can not be improved, in addition, because the ITO thin film material has the characteristics of hard brittleness and poor ductility, when the ITO conductive strips are attached to the non-full-plane windshield, the ITO conductive strips are easily broken at the bent parts, the non-conductive phenomenon is caused, and the heating defogging efficiency is lost.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is a primary object of the present invention to provide a transparent heating film that can uniformly heat up and rapidly demist the entire area.
To achieve the abovePurpose, the utility model discloses a transparent heating film contains: a base layer which is a transparent material thin layer with dielectric property; a resistance layer, which is a transparent conductive film having a resistivity of 60-150 Ω/sq (unit Ω/sq, Chinese meaning ohm per square meter), and is disposed on the base layer; an electrode layer having at least one electrode circuit pattern, wherein the electrode circuit pattern is formed by meshes interwoven by micron-sized conductive wires, and the mesh density (Grid density) of the electrode circuit pattern is 1-25 mesh/mm2(unit mesh/mm)2Chinese meaning mesh number per square millimeter), the electrode circuit pattern electrically overlapping at least a partial area of the resistive layer; and the protective layer is a transparent material thin layer with dielectric property, and the protective layer completely covers the area range containing the resistance layer and the electrode layer.
The base layer and the protective layer are made of one material selected from glass, polypropylene (PP), Polyethylene (PE), Polystyrene (PS), polymethyl methacrylate (PMMA), Polycarbonate (PC), polyethylene terephthalate (PET), polyvinyl chloride (PVC), Polyimide (PI), and Polyurethane (PU), but the material range is not limited to the above materials, and the substrate is suitable for various soft, hard, or flexible transparent substrates.
The resistance layer is a metal oxide film, and the material of the metal oxide film is selected from one of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc aluminum oxide (AZO), Antimony Tin Oxide (ATO), or Polyethylenedioxythiophene (PEDOT), but the application range is not limited to the above materials.
The micron-sized conductive wire is made of graphene or one of alloy materials mainly containing silver, copper, gold, aluminum and molybdenum; preferably, the line width of the micron-sized conductive line is 8 μm or less, and more preferably, the line width of the micron-sized conductive line is 5 μm or less.
According to the present invention, the electrode circuit pattern is electrically overlapped to the resistance layer through the conductive wires arranged in a grid pattern, thereby forming a plurality of electrical overlap points (electrical contacts) between the electrode circuit pattern and the resistance layer; when a power supply is input to the electrode circuit pattern, the area near the electric lapping point on the resistance layer can perform electrothermal conversion and generate heat energy, so that a plurality of heating sources which operate simultaneously and are uniformly distributed in position can be formed on the resistance layer, the heat energy is uniformly distributed to the whole acting area, the heat conduction time can be shortened, and the demisting efficiency can be improved; therefore, the utility model discloses can solve the inhomogeneous problem of the electrothermal conversion of large tracts of land heating film. Additionally, the utility model discloses will electrode circuit pattern electrical property overlap joint the resistance layer uses, because electrode circuit pattern is the net that interweaves by the conductor wire that has ductility metal material and forms constitutes, consequently the utility model discloses a transparent heating film can use under the condition of bending, for example attaches on the curved surface, even if cause when installing the curved surface the film material fracture of resistance layer, still accessible conductor wire on the electrode circuit pattern is normally electrically conductive, performance defogging efficiency.
In a preferred embodiment, the transparent heating film of the present invention further comprises at least one auxiliary electrode layer, wherein the auxiliary electrode layer has at least one auxiliary electrode circuit pattern, the auxiliary electrode circuit pattern is formed by a mesh formed by interweaving micron-sized conductive wires, and the auxiliary electrode circuit pattern is electrically connected to at least one local area of the electrode layer and the resistive layer, and the mesh of the auxiliary electrode circuit pattern and the mesh of the electrode circuit pattern are arranged without overlapping each other; wherein the grid density of the auxiliary electrode circuit pattern is 1-25 mesh/mm2The micron-sized conductive wire is made of graphene or one of alloy materials mainly containing silver, copper, gold, aluminum and molybdenum; preferably, the line width of the micron-sized conductive line is 8 μm or less, and more preferably, the line width of the micron-sized conductive line is 5 μm or less. In the embodiment of the present invention, the auxiliary electrode circuit pattern is additionally provided in the local area to increase the grid density in the local area, so as to reduce the Equivalent Impedance (Equivalent Impedance) of the resistance layer in the local area, and reduce the calorific value (calorific value) when performing the electrothermal conversion; from another aspect, the present inventionThe embodiment can increase and form more electric lapping points on the resistance layer, so that the heat can be uniformly distributed in the whole action area, the heat conduction time is further shortened, and the demisting efficiency is improved; according to the embodiment of the present invention, the heating value of the local area on the resistance layer can be adjusted by electrically overlapping the electrode circuit patterns and/or the auxiliary electrode circuit patterns of different grid densities on the local area on the resistance layer; accordingly, the utility model provides a means which can adjust the heating amount of the local area of the heating film according to the use requirement.
According to the present invention, in an embodiment, the electrode layer may include a plurality of electrode circuit patterns, a plurality of the electrode circuit patterns are formed by interlacing micron-sized conductive wires and have different grid densities, and the grid density is between 1 to 25 mesh/mm2The adjacent electrode circuit patterns are electrically connected with each other, and the electrode circuit patterns are electrically lapped with at least one part of the area of the resistance layer; in the embodiment of the present invention, the electrode layer is provided with a plurality of electrode circuit patterns with different grid densities, and the electrode circuit patterns are electrically overlapped on the resistance layer, so that a plurality of local areas with different equivalent impedance values are formed on the resistance layer, and different heat is generated in the local areas during operation.
The present disclosure presents some selected concepts in a simplified form and is described further below in the detailed description. The present disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
Drawings
Fig. 1 is a perspective view of a first embodiment of the present invention with parts separated;
fig. 2 is a schematic view of a stacked structure according to a first embodiment of the present invention;
fig. 3 is a plan view of an electrode layer of a first embodiment of the present invention;
FIG. 4 is a side sectional view of FIG. 3 at the location IV;
fig. 5 is a perspective view of a second embodiment of the present invention with parts separated;
fig. 6 is a schematic view of a stacked structure according to a second embodiment of the present invention;
fig. 7 is a plan view of an electrode layer of a second embodiment of the present invention;
FIG. 8 is a side sectional view of FIG. 7 at section VIII;
fig. 9 is a perspective view of a third embodiment of the present invention with parts separated;
fig. 10 is a schematic view of a stacked structure according to a third embodiment of the present invention;
fig. 11 is a plan view showing a third embodiment of the present invention, in which an electrode layer and an auxiliary electrode layer are stacked.
Symbolic illustration in the drawings:
10 a base layer;
20 a resistive layer;
30 electrode layers;
31 a conductive line;
40 a protective layer;
EL electrode circuit pattern
P electrical property lap joint point;
EL1 left electrode trace pattern;
EL2 center electrode trace pattern;
EL3 right electrode trace;
50 an auxiliary electrode layer;
51 a conductive line;
AEL1 left auxiliary electrode line pattern;
AEL3 right auxiliary electrode line pattern.
Detailed Description
Preferred embodiments of the present invention are described in the accompanying drawings, wherein, in order to provide clearer descriptions and easier understanding of the technical features of the present invention, the parts in the drawings are not drawn according to relative dimensions, and some dimensions have been exaggerated compared with other relevant dimensions; irrelevant details are not fully drawn for the sake of brevity.
Fig. 1 to 4 illustrate a first embodiment of a transparent heating film according to the present invention, which includes a base layer 10, a resistance layer 20, an electrode layer 30 and a protection layer 40 stacked in sequence; in this embodiment, the substrate 10 is a dielectric, high-transmittance glass sheet or a flexible polyethylene terephthalate (PET) sheet. The resistive layer 20 is disposed on one surface of the substrate 10, and the resistive layer 20 is an Indium Tin Oxide (ITO) film with a transparent characteristic, and the sheet resistivity is about 150 Ω/sq. As shown in fig. 1 and 3, the electrode layer 30 has an electrode circuit pattern EL formed by interweaving a plurality of micron-sized conductive wires 31 into a grid shape, the electrode circuit pattern EL is approximately equal to or smaller than the area of the resistive layer 20, and the electrode circuit pattern EL is electrically connected to the resistive layer 20; the micron-sized conductive line 31 may have a diameter of about 5 μm and a resistivity of 1.7 × 10−8Omega m copper wire, the grid density on the electrode line pattern EL is set to 4 mesh/mm2(i.e. Pitch ≈ 0.5mm, Pitch means the spacing between two conductive wires 31 (or 51)). The protective layer 40 is a dielectric, high-transmittance glass sheet or a flexible polyethylene terephthalate (PET) sheet, and the protective layer 40 may be made of the same material as the base layer 10.
The transparent heating film of the utility model can be obtained by superposing the layers in sequence; as shown in fig. 4, in this embodiment, the electrode circuit pattern EL is electrically lapped on the resistive layer 20 through the conductive wires 31 arranged in a grid shape, so that a plurality of electrically lapped points P are formed between the electrode circuit pattern EL and the resistive layer 20; when power is input to the electrode circuit pattern EL, the area near each electrical overlap point P on the resistance layer performs electrothermal conversion to generate heat energy, and since the electrical overlap points P are uniformly distributed on the resistance layer 20, the generated heat will be uniformly distributed to the whole action area, so as to avoid the damage of the device due to over-high temperature of the local area, and thus, the heat conduction time can be shortened, and the defogging efficiency can be improved.
Fig. 5 to 8 illustrate the present inventionA second embodiment of the heating film, this embodiment provides a transparent heating film having a larger heating value in the central area and a smaller heating value in the two side areas; compared with the first embodiment, the present embodiment mainly makes a modified design for the electrode layer 30, and the other two parts having the same structure are not repeated herein; as shown in fig. 5 and 7, the electrode layer 30 of the present embodiment includes a plurality of electrode circuit patterns with different grid densities, including: a left electrode wiring pattern EL1, a center electrode wiring pattern EL2, and a right electrode wiring pattern EL3, wherein the left electrode wiring pattern EL1 is electrically connected to the center electrode wiring pattern EL2, and the center electrode wiring pattern EL2 is electrically connected to the right electrode wiring pattern EL 3; the three electrode circuit patterns are formed by a grid formed by interweaving a plurality of micron-sized conductive wires 31, and the micron-sized conductive wires 31 can adopt the wire diameter width of about 5 μm and the resistivity of 1.7 multiplied by 10−8Omega m copper wire, and the three electrode circuit patterns respectively have different grid densities, wherein the grid density of the left side electrode circuit pattern EL1 and the right side electrode circuit pattern EL3 is set to 16 mesh/mm2The mesh density of the center electrode line pattern EL2 was set to 4 mesh/mm2The mesh density of the left electrode wiring pattern EL1 and the right electrode wiring pattern EL3 is greater than the mesh density of the center electrode wiring pattern EL 2.
Sequentially overlapping the base layer 10, the resistance layer 20, the electrode layer 30 and the protection layer 40 to form a transparent heating film; as shown in fig. 6 and 7, in this embodiment, the three electrode circuit patterns EL1, EL2, EL3 of the electrode layer 30 are electrically connected to the resistive layer 20, wherein the left electrode circuit pattern EL1 and the right electrode circuit pattern EL3 with higher mesh density are electrically connected to the two side regions of the resistive layer 20, and the central electrode circuit pattern EL2 with lower mesh density is electrically connected to the central region of the resistive layer 20; since the electrode circuit patterns with higher grid density are electrically lapped on the two side areas of the resistance layer 20, the equivalent resistance value of the two side areas of the resistance layer 20 can be reduced, and the heat productivity can be reduced when the electrothermal conversion action is carried out; in this embodiment, three regions with different equivalent impedance values, i.e., a left region with a low equivalent impedance value, a middle region with a high equivalent impedance value, and a right region with a low equivalent impedance value, can be formed on the resistor layer 20, so that during power-on operation, the middle region can generate higher heat energy to rapidly raise the temperature to exert a defogging effect, thereby ensuring the driving view of the driver, and the two side regions generate lower heat energy to prevent high temperature from damaging the contacts of the power input terminal.
Fig. 9 to 11 illustrate a third embodiment of the transparent heating film of the present invention, which also provides a transparent heating film having a larger heat generation amount in the central region and a smaller heat generation amount in the two side regions; the third embodiment is mainly designed by adding an auxiliary electrode layer compared with the first and second embodiments; as shown in fig. 9 and 10, the auxiliary electrode layer 50 includes a left auxiliary electrode line pattern AEL1 and a right auxiliary electrode line pattern AEL3, the two auxiliary electrode line patterns are formed by a grid formed by interweaving a plurality of micron-sized conductive lines 51, the micron-sized conductive lines 51 may have a line diameter width of about 5 μm and a resistivity of 1.7 × 10−8Omega m copper wire, and the grid density can be between 1 to 25 mesh/mm2For example, the mesh density is set to 4 mesh/mm as in the case of the electrode wiring pattern EL of the electrode layer 302(i.e., Pitch ≈ 0.5 mm).
Sequentially laminating the base layer 10, the resistance layer 20, the electrode layer 30, the auxiliary electrode layer 50 and the protective layer 40 to form a transparent heating film; as shown in fig. 11, in this embodiment, the auxiliary electrode layer 50 is electrically connected to the electrode layer 30 and the resistive layer 20, and the grids of the left auxiliary electrode line pattern AEL1 and the right auxiliary electrode line pattern AEL3 and the grids of the electrode line pattern EL are not overlapped with each other, wherein the electrode line pattern EL and the left auxiliary electrode line pattern AEL1 are electrically connected to the left region of the resistive layer 20, and the electrode line pattern EL and the right auxiliary electrode line pattern AEL3 are electrically connected to the right region of the resistive layer 20; since the meshes of the left auxiliary electrode line pattern AEL1 and the right auxiliary electrode line pattern AEL3 and the meshes of the electrode line pattern EL are not overlapped with each other, they are combined to form a higher mesh in the left and right regions of the resistive layer 20Density, i.e. the grid density becomes 16 mesh/mm2(i.e., Pitch ≈ 0.25mm), while the mesh density in the central region of the resistive layer 20 is still 4 mesh/mm2(i.e. Pitch ≈ 0.5mm), so that the equivalent resistance values formed at the two side regions of the resistance layer 20 are lower than that of the central region of the resistance layer 20, therefore, during the power-on operation, the middle region can generate higher heat energy to rapidly raise the temperature to exert the defogging effect, thereby ensuring the driving view of the driver, and the two side regions generate lower heat energy to prevent the contact of the power input terminal from being damaged by high temperature.
Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore the scope of the present invention is to be defined by the scope of the appended claims.
Claims (6)
1. A transparent heat generating film, comprising:
a base layer which is a transparent material thin layer with dielectric property;
a resistance layer, which is a transparent conductive film with a resistivity of 60-150 Ω/sq, and is disposed on the base layer;
an electrode layer having at least one electrode circuit pattern, wherein the electrode circuit pattern is formed by meshes interwoven by micron-sized conductive wires, and the mesh density is 1-25 mesh/mm2The electrode circuit pattern is electrically lapped on at least one local area of the resistance layer; and
and the protective layer is a transparent material thin layer with dielectric property, and the protective layer completely covers the area range containing the resistance layer and the electrode layer.
2. The transparent heat generating film according to claim 1, wherein the material of the base layer and the protective layer is selected from one of glass, polypropylene, polyethylene, polystyrene, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyimide, and polyurethane.
3. The transparent heat-generating film according to claim 1, wherein the resistive layer is a metal oxide thin film, and the material of the metal oxide thin film is selected from one of indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, and polyethylenedioxythiophene.
4. The transparent heat-generating film according to claim 1, wherein the electrode layer has a plurality of electrode line patterns, the plurality of electrode line patterns have different mesh densities, respectively, and the mesh density is 1 to 25 mesh/mm2And the adjacent electrode circuit patterns are electrically connected with each other.
5. The transparent heat-generating film according to claim 1, further comprising at least one auxiliary electrode layer having at least one auxiliary electrode circuit pattern, wherein the auxiliary electrode circuit pattern is formed by meshes interwoven by micron-sized conductive wires, and the mesh density is 1-25 mesh/mm2The auxiliary electrode circuit pattern is electrically connected with at least one local area of the electrode layer and the resistance layer in an overlapping mode, and grids of the auxiliary electrode circuit pattern and grids of the electrode circuit pattern are not overlapped with each other.
6. The transparent heat generating film according to claim 5, wherein the line width of the micron-sized conductive line is 8 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021835166.2U CN212752660U (en) | 2020-08-28 | 2020-08-28 | Transparent heating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021835166.2U CN212752660U (en) | 2020-08-28 | 2020-08-28 | Transparent heating film |
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| Publication Number | Publication Date |
|---|---|
| CN212752660U true CN212752660U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021835166.2U Active CN212752660U (en) | 2020-08-28 | 2020-08-28 | Transparent heating film |
Country Status (1)
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|---|---|
| CN (1) | CN212752660U (en) |
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- 2020-08-28 CN CN202021835166.2U patent/CN212752660U/en active Active
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