CN220023105U

CN220023105U - Heating film, display panel and instrument equipment

Info

Publication number: CN220023105U
Application number: CN202320601144.7U
Authority: CN
Inventors: 刘统辉; 陈庆中
Original assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Current assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-11-14
Anticipated expiration: 2033-03-23

Abstract

The utility model provides a heating film, a display panel and instrument equipment. The heating film comprises a substrate layer, a first conductive unit and a second conductive unit which are sequentially stacked, and the second conductive unit with smaller resistance is stacked on the surface of the first conductive unit with larger resistance and forms a structure which is mutually connected in parallel with the first conductive unit, so that the resistance of the first conductive wire can be smaller than that of the first conductive unit, and the first conductive wire can play a role of a wire. The heating channel part with larger resistance is used for heating the heating film, so that the problems of fog and the like generated when the heating film is used in an environment with low air temperature are prevented, and the service performance of the heating film is improved. The two conductive layers simultaneously realize the functions of heating and leading wires, realize multiplexing of the first conductive unit, and the second conductive unit is formed by taking the first conductive unit as a reference through coating, so that the arrangement mode can be more convenient for wiring of the first conductive wire, reduce the thickness and the area of the heating film, and be favorable for realizing miniaturized design.

Description

Heating film, display panel and instrument equipment

Technical Field

The utility model relates to the technical field of heating films, in particular to a heating film, a display panel and instrument equipment.

Background

When the instrument equipment is used in an environment with large temperature change, the problem of easy fogging exists, the fogging can influence the definition of a display panel of the instrument equipment, and the problem of inconvenient use is caused. And the whole volume of instrument equipment is less, and its display panel's area is also less, consequently, how to design good heating scheme in order to realize defogging to the display panel of instrument equipment is the problem that needs to be solved urgently.

Disclosure of Invention

The embodiment of the utility model discloses a heating film which can heat a display panel so as to realize a defogging function.

To achieve the above object, in a first aspect, the present utility model discloses a heating film comprising: a substrate layer; the first conductive unit is provided with a heating channel part and wiring parts connected to two opposite sides of the heating channel part; the second conductive unit is overlapped on one surface of the wiring part, which is away from the substrate layer, and is mutually connected with the wiring part in parallel to form a first conductive wire, and the resistance of the second conductive unit is smaller than that of the wiring part; the first conductive wire is electrically connected to the heating channel portion.

As an alternative implementation manner, in an embodiment of the present utility model, a plurality of first conductive units are provided, and adjacent heating channel portions are connected in series through the first conductive wire.

As an alternative implementation manner, in an embodiment of the present utility model, a plurality of heating channel portions extend along a first direction, the routing portions are located on two opposite sides of the heating channel portions along the first direction, and the plurality of heating channel portions are spaced along a second direction, where the first direction and the second direction intersect.

As an alternative embodiment, in an embodiment of the present utility model, the widths of the plurality of heating channel portions in the second direction are equal.

As an alternative embodiment, in the embodiment of the present utility model, the width of the heating channel part is 1mm to 3mm.

As an alternative embodiment, in an embodiment of the present utility model, a gap is formed between two adjacent heating channel parts, and the width of the gap is 10 μm to 100 μm.

As an alternative implementation manner, in an embodiment of the present utility model, the second conductive unit and the routing portion are connected in parallel to each other to form a second conductive wire, the heating film has a heating area and a routing area disposed around the heating area, the plurality of heating channel portions are located in the heating area, the first conductive wire and the second conductive wire are located in the routing area and are all disposed along the periphery of the heating area, at least part of the second conductive wire is located on a side of the first conductive wire facing away from the heating area, and the first conductive wire and the heating channel portion are alternately connected to form a heating resistor segment, and the second conductive wire is used for respectively communicating the heating resistor segment and a power supply.

As an alternative implementation manner, in an embodiment of the present utility model, the heating film further includes a flexible circuit board, where the flexible circuit board is used to electrically connect the second conductive wire and the power supply, respectively, and the second conductive wire is connected to the power supply through the flexible circuit board.

As an alternative implementation manner, in the embodiment of the present utility model, the sheet resistance of the first conductive unit is R ₁ The sheet resistance of the second conductive unit is R ₂ Wherein R is ₁ 、R ₂ Satisfy R of 100-100 ₁ /R ₂ ≤1500。

As an alternative implementation manner, in an embodiment of the present utility model, the first conductive unit is a transparent conductive unit.

As an alternative implementation, in an embodiment of the present utility model, the second conductive unit contains at least one of copper, silver, gold, aluminum, and tungsten.

In a second aspect, the present utility model also discloses a display panel, including a main body and a heating film according to the first aspect, where the main body includes a display area and a non-display area located at an outer periphery of the display area, the heating channel portion of the heating film is disposed corresponding to the display area, and the trace portion is disposed corresponding to the non-display area.

In a third aspect, the utility model also discloses an instrument device, which comprises a body and the display panel of the second aspect, wherein the display panel is arranged on the body.

Compared with the prior art, the utility model has the beneficial effects that:

according to the heating film provided by the embodiment of the utility model, the second conductive unit with smaller resistance is overlapped on the surface of the first conductive unit with larger resistance and forms a structure in parallel connection with the first conductive unit, on one hand, the resistance of the first conductive wire formed after parallel connection can be smaller than the resistance of the first conductive unit, and when the resistance of the second conductive unit is far smaller than the resistance of the first conductive unit, the resistance of the first conductive wire can be similar to the resistance of the second conductive unit. That is, the first conductive wire may function as a wire, which has a small thermal effect, and can function as a conductive connection between the respective heating channel portions or between the heating channel portions and an external power source. Meanwhile, the heating channel part with larger resistance is utilized to perform heating function, so that the heating area is utilized to heat the heating film, the problems of mist and the like generated when the heating film is used in an environment with low air temperature are prevented, and the service performance of the heating film is improved.

On the other hand, the two conductive layers are utilized to realize the functions of heating and lead wires simultaneously, so that multiplexing of the first conductive unit is realized, and the first conductive unit can be used for conducting electricity and also can be used as a mounting base of the second conductive unit; the second conductive unit is formed by taking the first conductive unit as a reference and coating, and the arrangement mode can be more convenient for the wiring of the first conductive wire, so that the wiring is not required to be additionally arranged, the thickness and the area of the heating film are reduced, and the miniaturization design is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a heating film according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an equivalent circuit diagram of a heating film provided by an embodiment of the present utility model;

FIG. 4 is an enlarged view of part B of FIG. 1;

FIG. 5 is an exploded view of a display panel according to an embodiment of the present utility model;

fig. 6 is a block diagram of a meter device according to an embodiment of the present utility model.

Icon: 100. heating the film; 10. a substrate layer; 20. a first conductive unit; 21. a heating channel portion; 210. a gap; 220. a heating resistor section; 22. a wiring portion; 30. a second conductive unit; 31. a first conductive line; 32. a second conductive line; 33. a third conductive line; 40. a heating zone; 50. a wiring area; 60. a flexible circuit board; 200. a display panel; 201. a power supply; 202. a main body; 2021. a display area; 2022. a non-display area; 300. an instrument device; 301. a body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the utility model will be further described with reference to the examples and the accompanying drawings.

Referring to fig. 1 to 4, in a first aspect, the present utility model provides a heating film 100, which includes a substrate layer 10, a first conductive unit 20 and a second conductive unit 30. The first conductive unit 20 has a heating path portion 21 and trace portions 22 connected to opposite sides of the heating path portion 21. The second conductive unit 30 is stacked on a surface of the trace portion 22 facing away from the substrate layer 10, and is connected in parallel with the trace portion 22 to form a first conductive line 31, the resistance of the second conductive unit 30 is smaller than that of the trace portion 22, and the first conductive line 31 is electrically connected with the heating channel portion 21.

By stacking the second conductive unit 30 having a smaller resistance on the surface of the first conductive unit 20 having a larger resistance and forming a structure in parallel with the first conductive unit 20, on the one hand, the resistance of the first conductive wire 31 formed after parallel connection can be smaller than the resistance of the first conductive unit 20 itself, and when the resistance of the second conductive unit 30 is much smaller than the resistance of the first conductive unit 20, the resistance of the first conductive wire 31 can be approximated to the resistance of the second conductive unit 30. That is, the first conductive wire 31 may function as a wire, which has a small thermal effect, and can function as a conductive connection between the respective heating channel portions 21 or between the heating channel portions 21 and the external power source 201. Meanwhile, the heating channel part 21 with larger resistance is utilized to perform a heating function, so that the heating film 100 is heated, the problems of mist and the like generated when the heating film 100 is used in an environment with low air temperature are prevented, and the service performance of the heating film 100 is improved.

On the other hand, the two conductive layers are utilized to realize the functions of heating and lead simultaneously, so that the first conductive unit 20 is multiplexed, namely, the first conductive unit 20 can be used for conducting electricity and also can be used as a mounting base of the second conductive unit 30; the second conductive unit 30 is stacked on the first conductive unit 20 in a manner of coating film or the like based on the first conductive unit 20, and this arrangement can facilitate the routing of the first conductive wire 31, so that no additional routing is required, thereby reducing the thickness and area of the heating film 100, and facilitating the miniaturization design.

Alternatively, the substrate layer 10 needs to have a certain thickness to support the first conductive unit 20 and the second conductive unit 30 and provide sufficient supporting strength. Illustratively, the substrate layer 10 may include, but is not limited to, various plastic films such as PET (polyethylene terephthalate), PEN (polyethylene naphthalate), COP (cyclic olefin polymer), PVB (polyvinyl butyral Ding Quanzhi), TPU (polyurethane), PDMS (polydimethylsiloxane), etc., and may be various transparent glasses or other transparent materials. These materials have a characteristic of high transmittance, and when the heating film 100 is used for a display panel, the light transmission effect of the display panel can be not affected. In this embodiment, the optical grade PET is preferably 20 μm to 500 μm thick with a transmittance > 80%, so that the base material layer 10 can have a good light transmitting effect and sufficient bearing strength.

In some embodiments, the first conductive unit 20 may be provided in plurality, and adjacent heating channel parts 21 are connected in series by the first conductive line 31. By providing a plurality of first conductive units 20, the heating channel portions 21 can be better distributed at the respective positions of the heating film 100, ensuring that any position of the heating film 100 has a heating effect. By arranging the respective heating channel portions 21 in series, the current level of each heating channel portion 21 is uniform, so that heating is more uniform, thereby improving the heating effect of the heating film 100 as a whole. Alternatively, the respective heating channel portions 21 may be arranged in a substantially parallel manner, so that the area of the surface of the heating film 100 can be further saved, the density of the arrangement of the heating channel portions 21 can be increased, and the heating effect can be improved.

Further, the plurality of heating channel portions 21 each extend along a first direction (x direction as shown in fig. 1), the trace portions 22 are located at opposite sides of the heating channel portions 21 along the first direction, and the plurality of heating channel portions 21 are spaced apart along a second direction (y direction as shown in fig. 1), wherein the first direction is parallel to the current conducting direction, and the first direction and the second direction intersect. By arranging the heating channel portions 21 to extend in the first direction and to be arranged at intervals in the second direction, the density of arranging the heating channel portions 21 in the heating zone 40 can be further improved, and the heating channel portions 21 can be distributed more neatly in the heating zone 40, and the covered area is larger, thereby satisfying the demand for uniform heating of the heating film 100. In the embodiment shown in fig. 1, the first direction and the second direction are perpendicular to each other. Of course, in other examples, the first direction and the second direction may also be at an acute angle or an obtuse angle with respect to each other.

In some embodiments, the widths of the plurality of heating channel portions 21 in the second direction may be equal. In this way, the thermal effect generated by each heating channel portion 21 is substantially the same, and the problems such as the local temperature of the heating film 100 being too high or the temperature being insufficient can be avoided, and the heating effect on the heating film 100 can be further improved.

Alternatively, the width of the heating channel portion 21 is 1mm to 3mm. For example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc. can be used. For the heating film 100 whose shape is irregular, the shape in which the heating regions 40 are correspondingly provided is also generally irregular, and the length of each heating channel portion 21 in the first direction is not equal, so that there is a problem in that the current distribution is uneven in the heating channel portion 21. When the width of the heating tunnel portion 21 is set sufficiently small, heat conduction occurs inside the heating tunnel portion 21, and the heat conduction can make the heat in the heating tunnel portion 21 uniform in a short time, thereby solving the problem of uneven heat generation.

In some embodiments, a gap 210 is formed between two adjacent heating channel portions 21, and the width of the gap 210 is 10 μm to 100 μm. For example, the width may be set to 10 μm, 30 μm, 50 μm, 80 μm, 100 μm, etc. By providing the small gap 210, when the heating film 100 is used for the display panel 200, it is possible to make it difficult for the user to perceive the presence of the gap 210, and to reduce the influence of the gap on the user's use appearance, thereby improving the appearance effect of the heating film 100. Illustratively, the width of the gap 210 between the individual heating channel portions 21 may be the same, which facilitates reducing the difficulty of setting the individual heating channel portions 21. Of course, in other examples, the respective gaps 210 may also be unequal.

In some embodiments, the second conductive unit 30 and the trace portion 22 are connected in parallel to each other to form a second conductive line 32, the heating film 100 has a heating region 40 and a trace region 50 disposed around the heating region 40, the plurality of heating channel portions 21 are located in the heating region 40, the first conductive line 31 and the second conductive line 32 are located in the trace region 50 and are disposed along the periphery of the heating region 40, at least part of the second conductive line 32 is located at a side of the first conductive line 31 facing away from the heating region 40, the first conductive line 31 and the heating channel portions 21 are alternately connected to form a heating resistor segment 220, and the second conductive line 32 is used for communicating the heating resistor segment 220 and the power source 201, respectively.

By disposing the routing region 50 around the heating region 40, the routing portion 22 of the first conductive unit 20 can be located at the routing region 50, and the heating channel portion 21 can be located at the heating region 40, thereby shortening the routing distance of the first conductive wire 31. The second conductive wire 32 is located on a side of the first conductive wire 31 away from the heating area 40, and the second conductive wire 32 can be disposed along the first conductive wire 31, so that the routing distance of the second conductive wire 32 is also shortened, and the space occupied by the routing area 50 is reduced. By arranging the routing area 50 along the periphery of the heating area 40, the routing area 50 can adapt to the trend of the outer contour of the heating area 40, so that the overall structure of the heating film 100 is more compact. The irregularly shaped heating film 100 can be provided with more uniform routing of the heating region 40 and the routing region 50.

Taking the shape of the heating film 100 as a racetrack shape as an example, as shown in fig. 1, the routing area 50 is disposed on an arc-shaped edge of the racetrack-shaped heating film 100, the heating area 40 is provided with a plurality of first conductive units 20 parallel to each other, the plurality of first conductive units 20 are disposed along the second direction, two ends of the first conductive units 20 along the first direction are disposed on the arc-shaped edge, and the routing area 50 is disposed along the shape of the arc-shaped edge. So that both the heating path portion 21 and the trace portion 22 can be distributed throughout the heating film 100, thereby ensuring heating uniformity and heating effect of the heating film 100. It will be appreciated that the second conductive line 32 is also spaced from the first conductive line 31 so as to avoid shorting therebetween. Of course, in other examples, the heating film 100 may be provided in a circular, rectangular or other irregular shape in order to accommodate the shape of the display panel.

Illustratively, a third conductive wire 33 may be disposed on a side of the heating region 40 where the second conductive wire 32 is not disposed, and the third conductive wire 33 may be formed by connecting the first conductive unit 20 and the second conductive unit 30 in parallel, where the third conductive wire 33 is used to electrically connect the heating resistor segment 220 and the power source 201, so that the power source 201, the heating resistor segment 220 and the third conductive wire 33 are connected end to end in sequence to form a complete current loop.

In some embodiments, the heating film 100 further includes a flexible circuit board 60, and the flexible circuit board 60 is configured to electrically connect the second conductive line 32 and the power source 201, respectively, and the second conductive line 32 is connected to the power source 201 through the flexible circuit board 60. The heating film 100 can be applied to the display panel 200, in this case, the power supply 201 may be disposed on the control motherboard of the display panel 200 instead of the power supply 201, and the second conductive line 32 of the heating film 100 is connected to the power supply 201 through the flexible circuit board 60, so as to facilitate the light and thin design of the heating film 100. Illustratively, the second conductive lines 32 are connected with the flexible circuit board 60 through an ACF (anisotropic conductive film) thermo-compression process. Of course, the third conductive line 33 and the flexible circuit board 60 may be connected in the above-described manner.

In some embodiments, the sheet resistance of the first conductive unit 20 isR ₁ The sheet resistance of the second conductive unit 30 is R ₂ Wherein R is ₁ 、R ₂ Satisfy R of 100-100 ₁ /R ₂ Less than or equal to 1500. The sheet resistance value of the first conductive unit 20 and the sheet resistance value of the second conductive unit 30 are controlled within the above range, so that the sheet resistance difference between the two is enough large, and the sheet resistance of the second conductive unit 30 is enough small, so that the first conductive unit 20 and the second conductive unit 30 can achieve smaller resistance after being connected in parallel, the thermal effect of the first conductive wire 31 can be reduced on the premise of ensuring that the first conductive unit 20 has good heating performance, and excessive heat generated by the first conductive wire 31 in the heating process of the heating channel part 21 is avoided, thereby improving the service performance of the heating film 100.

In some embodiments, the first conductive unit 20 is a transparent conductive unit, and the first conductive unit 20 contains at least one of ITO (indium tin oxide), nano silver wire, carbon nanotube, PEDOT (polyethylene dioxythiophene). The first conductive unit 20 is made of the above material, and the first conductive unit 20 has high transparency on the premise of good conductivity and heating performance, so that only the heating channel portion 21 can be arranged corresponding to the display area of the display panel 200, and the influence of the arrangement of the heating film 100 on the light transmission function of the display panel 200 is reduced. Meanwhile, by providing the first conductive unit 20 as a transparent conductive unit, the heating region 40 of the heating film 100 can be provided corresponding to the display region of the display panel 200 without affecting the display effect of the display region.

In some embodiments, the second conductive unit 30 contains at least one of copper, silver, gold, aluminum, tungsten. The metal material has good conductivity, has small thermal effect when conducting current, and can avoid generating excessive heat in the routing area 50.

Illustratively, the heating film 100 may be produced by:

first, a base material layer 10 is provided, and a first conductive layer (not shown) and a second conductive layer (not shown) are sequentially formed on the surface of the base material layer 10, wherein the first conductive layer and the second conductive layer are continuous conductive layers.

The surface of the second conductive layer is covered with the patterned first photoresist, the second conductive layer is subjected to first exposure and development, the second conductive layer and the first conductive layer are etched by using a first etching solution, and the portions of the first conductive layer and the second conductive layer corresponding to the gaps 210 are simultaneously etched and removed, so that the gaps 210 are formed. The first photoresist is stripped off to obtain a plurality of first conductive units 20 arranged at intervals formed on the first conductive layer, and a plurality of second conductive units 30 arranged at intervals formed on the second conductive layer.

And covering the second conductive layer with the patterned second photoresist, exposing and developing the second conductive layer for the second time, etching the second conductive layer by using a second etching solution, and removing the part of the second conductive layer corresponding to the heating channel part 21 by etching, thereby exposing the heating channel part 21 in the first conductive layer. The second photoresist on the surface of the second conductive layer is removed by stripping, so that the second conductive layer only retains the second conductive units 30 corresponding to the trace portions 22, thereby obtaining the heating film 100 described above.

It will be appreciated that the second etching liquid is different from the first etching liquid, and the second etching liquid does not act on the first conductive unit 20, so that the first conductive unit 20 can be left unetched when the second conductive layer is etched away.

In a second aspect, referring to fig. 5, the present utility model further provides a display panel 200, including a main body 202 and the heating film 100 of the first aspect, where the main body 202 includes a display area 2021 and a non-display area 2022 located at an outer periphery of the display area 2021, and the heating channel portion 21 of the heating film 100 is disposed corresponding to the display area 2021, and the trace portion 22 is disposed corresponding to the non-display area 2022. In this way, the first conductive unit 20 may improve the transparency of the heating channel portion 21 by selecting a transparent conductive material to ensure that the heating film 100 has a good light transmission effect, thereby avoiding affecting the display performance of the display panel 200. Of course, in other examples, the non-display region 2022 may be discontinuously disposed at the periphery of the display region 2021, for example, disposed only on one side or two sides of the display region 2021, where the heating channel portion 21 of the heating film is still disposed corresponding to the display region 2021, at least one of the trace portions 22 may be correspondingly disposed in the non-display region 2022, and the rest of the trace portions 22 may be correspondingly disposed at the edge of the display region 2021, so that the shielding effect of the trace portions 22 on the display region 2021 can be reduced, thereby improving the display effect.

The display panel 200 may be an operation panel or an indication panel for the electronic instrument device 300, or may be a dial cover for a position such as a dashboard of the mechanical instrument device 300. The specific type and use of the display panel 200 is not limited in this embodiment.

In a third aspect, referring to fig. 6, the present utility model further provides a meter device 300, including a body 301 and the display panel 200 according to the aforementioned second aspect, where the display panel 200 is disposed on the body 301.

The heating film, the display panel and the instrument device disclosed in the embodiments of the present utility model are described in detail, and specific examples are applied to the description of the principles and the implementation modes of the present utility model, and the description of the above examples is only used for helping to understand the heating film, the display panel and the instrument device and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present utility model, the present disclosure should not be construed as limiting the present utility model in summary.

Claims

1. A heating film, comprising:

a substrate layer;

the first conductive unit is provided with a heating channel part and wiring parts connected to two opposite sides of the heating channel part;

the second conductive unit is overlapped on one surface of the wiring part, which is away from the substrate layer, and is mutually connected with the wiring part in parallel to form a first conductive wire, and the resistance of the second conductive unit is smaller than that of the wiring part;

the first conductive wire is electrically connected to the heating channel portion.

2. The heating film according to claim 1, wherein a plurality of the first conductive units are provided, and adjacent ones of the heating channel portions are connected in series by the first conductive line.

3. The heating film of claim 2, wherein a plurality of said heating channel portions each extend in a first direction, said trace portions are located on opposite sides of said heating channel portions in said first direction, and a plurality of said heating channel portions are spaced apart in a second direction, said first and second directions intersecting.

4. A heating film according to claim 3, wherein widths of a plurality of said heating channel portions in said second direction are equal.

5. The heating film according to claim 4, wherein the width of the heating channel portion is 1mm to 3mm.

6. A heating film according to claim 3, wherein a gap is formed between adjacent two of said heating channel portions, said gap having a width of 10 μm to 100 μm.

7. The heating film according to claim 1, wherein the second conductive unit and the trace portion are connected in parallel with each other to form a second conductive line, the heating film has a heating region and a trace region provided around the heating region, a plurality of the heating channel portions are located in the heating region, the first conductive line and the second conductive line are located in the trace region and are all provided along the periphery of the heating region, at least part of the second conductive line is located on a side of the first conductive line facing away from the heating region, the first conductive line and the heating channel portions are alternately connected to form a heating resistor section, and the second conductive line is used for communicating the heating resistor section and a power source, respectively.

8. The heating film of claim 7, further comprising a flexible circuit board for electrically connecting the second conductive wire and the power source, respectively, the second conductive wire being connected to the power source through the flexible circuit board.

9. The heating film of any of claims 1-8, wherein the sheet resistance of the first conductive element is R ₁ The sheet resistance of the second conductive unit is R ₂ Wherein R is ₁ 、R ₂ Satisfy R of 100-100 ₁ /R ₂ ≤1500。

10. The heating film of any of claims 1-8, wherein the first conductive element is a transparent conductive element.

11. The heating film of any of claims 1-8, wherein the second conductive element comprises at least one of copper, silver, gold, aluminum, tungsten.

12. A display panel comprising a main body and the heating film according to any one of claims 1 to 11, wherein the main body comprises a display area and a non-display area located at the periphery of the display area, the heating channel portion of the heating film is disposed corresponding to the display area, and the trace portion is disposed corresponding to the non-display area.

13. A meter apparatus comprising a body and the display panel according to claim 12, the display panel being provided to the body.