JP2023068208A - Anti-fogging heating element - Google Patents

Abstract

To provide an anti-fogging heating element for preventing fogging of a transparent plate.SOLUTION: An anti-fogging heating element 1 heats a front glass 2 which is a transparent plate located before a lens 3d of an on-vehicle camera 3 and prevents fogging. The anti-fogging heating element 1 comprises a transparent substrate 10 and a heat diffusion part 12. The transparent substrate 10 is provided before the lens 3d in the front glass 2. The heat diffusion part 12 has an outer frame 12a and a meshed part 12b that are provided in the transparent substrate 10 and that diffuse heat so as to include a front projection region of the lens 3d and heat the front glass 2.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to an antifogging heating element for antifogging a transparent plate.

Vehicles are equipped with in-vehicle cameras in close proximity to the windshield and rear glass. Cameras for drive recorders and stereo cameras for advanced driver-assistance systems (ADAS) are examples.

A vehicle-mounted camera has a problem that, for example, when the windshield becomes foggy due to dew condensation, the outside world on the windshield cannot be photographed clearly. Here, Patent Document 1 describes that the air conditioner is operated in the defroster mode to clear the entire windshield.

JP-A-11-139262

However, the air conditioner defroster cannot quickly defog the front of the vehicle camera on the windshield.

Accordingly, one aspect of the present invention provides an anti-fogging heating element for anti-fogging a transparent plate.

One aspect of the present invention is an anti-fogging heating element that heats a transparent plate positioned in front of a lens of a camera to prevent fogging, comprising a transparent base material and a heat diffusion part, wherein the transparent base material is is provided in front of the lens on the transparent plate, and the thermal diffusion part is provided in the transparent base material and forms a thermal diffusion path that heats the transparent plate by diffusing heat so as to include the front of the lens. It is an anti-fog heating element with

According to one aspect of the invention, the transparent plate in front of the lens of the camera can be heated.

1 is an external view showing an anti-fogging heating element according to a first embodiment of the present invention installed on a windshield of a vehicle; FIG. II-II line sectional view of FIG. The front view of an anti-fogging heating element. The front view of the anti-fogging heating element seen from arrow IV in FIG. FIG. 4 is a cross-sectional view taken along the line VV of FIG. 3; 6A is a front view of the antifogging heating element of the second embodiment, and 6B is a front view of the antifogging heating element of the third embodiment. 7A is a front view of an anti-fogging heating element according to a fourth embodiment, and 7B is a front view of an anti-fogging heating element according to a fifth embodiment. 8A is a front view of the antifogging heating element of the sixth embodiment, and 8B is a front view of the antifogging heating element of the seventh embodiment. 9A is a front view of the anti-fogging heat generating body of the eighth embodiment, and 9B is a front view of the anti-fogging heat generating body of the ninth embodiment. 10A is a front view of the anti-fogging heating element of the tenth embodiment, and 10B is a front view of the anti-fogging heating element of the tenth embodiment as seen from arrow IV in FIG. A front view of an antifogging heating element of the eleventh embodiment. 12A is a front view of the anti-fogging heat generating body of the 12th embodiment, and 12B is a front view of the anti-fogging heat generating body of the 13th embodiment. FIG. 5 is a cross-sectional view corresponding to FIG. 5 showing a laminated glass and an anti-fogging heating element according to one embodiment of the present invention; FIG. 5 is a cross-sectional view corresponding to FIG. 5 showing a laminated glass and an anti-fogging heating element according to one embodiment of the present invention; FIG. 5 is a cross-sectional view corresponding to FIG. 5 showing a laminated glass and an anti-fogging heating element according to one embodiment of the present invention;

Exemplary embodiments of the invention will now be described with reference to the drawings. It should be noted that when describing "first" and "second" in the present specification and claims, they are used to distinguish different components, and to indicate a specific order and superiority. It is not used for In addition, the same reference numerals are assigned to the configurations that are common to the respective embodiments and have the same effects, and redundant explanations are omitted. Further, the horizontal direction of the front surface of the anti-fogging heating element 1 shown in FIG.

First embodiment [Figs. 1 to 5]

The anti-fogging heating element 1 of this embodiment is installed on the windshield 2 of the vehicle as a "transparent plate". As shown in FIGS. 1 and 2, an in-vehicle camera 3 is installed in the upper center of the windshield 2 . The in-vehicle camera 3 and the anti-fogging heating element 1 constitute one aspect of the "in-vehicle camera device" of the present invention. The vehicle-mounted camera 3 is a camera for a drive recorder, and includes a fixed portion 3a fixed to the interior surface 2a of the windshield 2, a support portion 3b extending from the fixed portion 3a, and a camera body portion 3c supported by the support portion 3b. and The fixed portion 3a is fixed to the windshield 2 with an adhesive material (not shown). A lens 3d is provided on the camera main body 3c. An anti-fogging heating element 1 is installed on the windshield 2 in front of the lens 3d (in the direction from the passenger compartment to the outside of the vehicle through the windshield 2 (imaging direction)).

Anti-fog heating element 1
The anti-fogging heating element 1 includes a transparent substrate 10, a heating section 11, a heat diffusion section 12, a protective layer 13, and an adhesive layer 14 (see FIG. 5). More specifically, the heating portion 11 and the thermal diffusion portion 12 are provided on the first surface 10 a of the transparent base material 10 . The protective layer 13 is formed so as to cover the entire first surface 10 a of the transparent base material 10 including the heating portion 11 and the heat diffusion portion 12 . An adhesive layer 14 is formed on the surface 13 a of the protective layer 13 . The adhesive layer 14 is formed on the entire surface 13 a , and the anti-fogging heating element 1 is attached to the interior surface 2 a of the windshield 2 by the adhesive layer 14 .

Transparent substrate 10
The transparent base material 10 can be composed of an electrically insulating and transparent resin film. A resin film made of a thermoplastic resin can be used. If it is a thermoplastic resin, it can be easily formed to correspond to the shape of the mounting surface (the windshield 2) of the object to be mounted by heating and molding. With such an anti-fogging heating element 1 having a transparent substrate 10, it is possible to suppress the occurrence of problems such as wrinkles when being attached to the mounting surface. A transparent resin film is used as the transparent substrate 10 . This is because the colored resin film will color the image captured by the vehicle-mounted camera 3 . For this reason, the resin film that constitutes the transparent base material 10 is a colorless and transparent resin film that does not color the image taken by the vehicle-mounted camera 3 .

Specific materials of the resin film used for the transparent substrate 10 include, for example, polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polycarbonate (PC) resin, polymethyl methacrylate (PMMA) resin, polypropylene (PP ) resin, polyurethane (PU) resin, polyamide (PA) resin, polyether sulfone (PES) resin, polyether ether ketone (PEEK) resin, triacetyl cellulose (TAC) resin, polyimide (PI) resin, cycloolefin polymer (COP) and the like.

As the resin film of the transparent base material 10, a primer layer for enhancing adhesion to the conductive polymer, a surface protective layer, an overcoat layer for antistatic purposes, and the like are subjected to surface treatments made of organic polymers. You can use what you have. Such a resin film may be formed as an integrally molded product by superimposing it on another resin molded body by two-color molding or insert molding.

The thickness of the transparent substrate 10 (resin film) is preferably 10-500 μm, more preferably 75-200 μm. If the thickness of the transparent substrate 10 is up to 500 μm, the strength of the antifogging heating element 1 can be obtained. On the other hand, there is little need to increase the strength of the transparent base material 10 to a thickness exceeding 500 μm. Furthermore, if the transparent substrate 10 has a thickness of less than 10 μm, the durability of the transparent substrate 10 may be insufficient.

heating unit 11
The heating part 11 is provided in a layered manner on the first surface 10 a of the transparent base material 10 . The heating portion 11 has a main body portion 11a and a wiring portion 11b.

The body portion 11a is formed as a "heat generating conductive portion" that generates heat when energized. Further, the body portion 11a is configured as an "outer edge heat generating portion" surrounding a thermal diffusion portion 12, which will be described later. The main body portion 11a is formed inside the outer peripheral edge of the transparent base material 10, and is formed in a frame shape in this embodiment. Specifically, the body portion 11a is formed of an upper wiring 11a1, a pair of side wirings 11a2 and 11a3, and a lower wiring 11a4 facing the upper wiring 11a1. A pair of upper wirings 11a1 are provided. Specifically, it is composed of an upper wiring 11a1 connecting the side wiring 11a2 and the wiring portion 11b, and an upper wiring 11a1 connecting the side wiring 11a3 and the wiring portion 11b.

The body portion 11a is made of a material that generates heat when current flows. Specifically, the body portion 11a can be formed of, for example, a conductive metal foil, a metal wire, or a conductive coating.

For example, a copper foil, an aluminum foil, or the like can be used as the conductive metal foil. For example, a copper wire or the like can be used as the metal conducting wire. The body portion 11a can be formed by attaching a copper foil and a copper wire formed in the shape of the body portion 11a to the first surface 10a of the transparent base material 10 . The conductive coating film can be formed from metal paste, carbon paste, or the like. Specifically, for example, it can be formed by applying silver paste, copper paste, or carbon paste in the shape of the main body portion 11a.

The wiring portion 11b extends from the transparent base material 10 and connects the main body portion 11a and a power source (not shown). Therefore, the wiring portion 11b is composed of a covered electric wire extending from the transparent substrate 10. As shown in FIG. Alternatively, a flexible printed circuit board (FPC) can be used for the wiring part 11b. One end of the wiring portion 11b is connected to the upper wiring 11a1 of the main body portion 11a. The wiring portion 11b and the main body portion 11a are conductively connected by, for example, a conductive adhesive. The main body portion 11a and the wiring portion 11b may share the transparent base material 10 and may be formed by continuously forming wiring made of a conductive material.

Thermal diffusion part 12
The heat spreader 12 has a “thermal spreader” that conducts the heat generated by the heating unit 11 . Specifically, the heat diffusion portion 12 of the present embodiment includes an outer frame portion 12a made of rectangular heat-conducting wires, and a mesh portion 12b made of a plurality of heat-conducting wires intersecting inside the outer frame portion 12a. have. The outer frame portion 12a and the mesh portion 12b form a "thermal diffusion path".

The outer frame portion 12a is formed adjacent to the main body portion 11a of the heating portion 11 over the entire circumference. Therefore, the heat generated by the upper wiring 11a1, the side wirings 11a2, 11a3, and the lower wiring 11a4 of the main body portion 11a is conducted through the transparent base material 10 to the frame line portions of the outer frame portion 12a adjacent to each other.

The mesh portion 12b is formed by crossing a plurality of vertical lines 12b1 and a plurality of horizontal lines 12b2 in a grid-like mesh shape. Those vertical lines 12b1 and horizontal lines 12b2 constitute "heat conducting lines". The heat transmitted from the heating unit 11 to the outer frame part 12a is transmitted to the vertical line 12b1 and the horizontal line 12b2 connected to the outer frame part 12a.

The heat-conducting wire constituting the heat diffusion part 12 is formed of a coating film (electrically-insulating heat-conducting film) containing an electrically-insulating heat-conducting filler in a polymer matrix.

Examples of materials for the polymer matrix include acrylic resins, epoxy resins, polyester resins, polyurethane resins, phenol resins, melamine resins, silicone resins, polyamide resins, polyimide resins, and polyvinyl chloride resins.

As the first feature of the thermally conductive filler used for the thermal diffusion part 12, a material having excellent thermal conductivity can be used. Specifically, the thermally conductive filler preferably has a thermal conductivity of more than 25 W/m·K. According to this, it is possible to quickly and effectively perform heat diffusion to the heat diffusion portion 12 . Therefore, by quickly and effectively heating the portion of the windshield 2 where the anti-fogging heating element 1 is attached and the surrounding portion, the occurrence of dew condensation can be suppressed or eliminated. As a result, it is possible to prevent cloudiness due to dew condensation from spoiling the image of the vehicle-mounted camera 3 .

Furthermore, the thermally conductive filler can be electrically insulating (low electrical conductivity) as a second feature. If the heat diffusion part 12 is formed as, for example, a conductive mesh, the heat diffusion part 12 can be used for various wireless data communications (for example, infrared communication, GPS communication, ETC (Electronic Toll Collection System), VICS) for communication equipment in the vehicle. (registered trademark: Vehicle Information and Communication System)). However, since the thermal diffusion part 12 is electrically insulating (non-conductive), there is an advantage that it does not block the transmission and reception of radio waves performed by communication equipment. Note that communication devices include not only in-vehicle devices but also portable communication terminals such as smartphones possessed by passengers.

Furthermore, the thermally conductive filler can have a low saturation and a high brightness as a third feature. Specifically, the heat conductive filling that can reduce the reflection of the heat conductive wire forming the heat diffusion part 12 in the image of the outside world captured through the anti-fogging heating element 1 attached to the windshield 2 with the in-vehicle camera 3. It is preferable to use wood. From this point of view, it is preferable that the thermally conductive filler has no hue and a wiring color with high brightness, specifically white or light gray.

Regarding the third feature, the heat spreader 12 can be configured as a transparent heat conducting wire. The smaller the difference in the refractive index of the visible light between the polymer matrix forming the heat conducting wire of the heat diffusion part 12 and the heat conducting filler, the less conspicuous the heat conducting filler and the less light transmission of the heat conducting wire. properties (transparency) can be improved. Combinations of such polymeric matrices and thermally conductive fillers include combinations of silicone resins and silica powders. Furthermore, it is preferable that the refractive index of the visible light between the thermal diffusion portion 12 and the transparent substrate 10 is zero or small. According to this, the heat diffusion portion 12 can be made as indistinguishable as possible from the transparent substrate 10 in terms of appearance.

Materials for the thermally conductive filler include, for example, metal oxides, metal nitrides, metal carbides, and metal hydroxides. Specific examples of metal oxides include aluminum oxide, magnesium oxide, zinc oxide, and silicon oxide (silica powder). Examples of metal nitrides include boron nitride and aluminum nitride. Metal carbides include silicon carbide. Metal hydroxides include aluminum hydroxide. Of these, aluminum oxide, magnesium oxide, zinc oxide, silicon oxide, boron nitride, aluminum nitride, and aluminum hydroxide all have the above-described first to third characteristics, and in particular, white color with respect to the third characteristic. preferred in some respects. These thermally conductive fillers can be used alone or in combination. For example, silica powder contained in silicon oxide can be combined with a silicone resin to form the thermal diffusion portion 12 with excellent transparency, but silica powder has a higher thermal conductivity than other thermally conductive fillers exemplified. Therefore, it is preferable to use it in combination with a thermally conductive filler having a high thermal conductivity such as alumina.

As for the shape of the thermally conductive filler, it is possible to use powder in the form of particles, fibers, or scales. When the thermally conductive filler has an anisotropic shape (anisotropic body) that extends in a specific direction, such as fibrous or scale-like, by aligning the stretching direction of the thermally conductive filler and orienting it, the specific direction can increase thermal conductivity (anisotropic thermal diffusivity) toward In order to orient the thermally conductive filler in a specific direction in this way, when the liquid composition in which the thermally conductive filler is filled in the polymer matrix is applied to the transparent substrate 10 by screen printing or the like, the specific Orientation can be achieved by applying pressure along the direction.

The content of the thermally conductive filler is preferably 30 to 95% by volume of the thermally conductive filler having a thermal conductivity of more than 25 W/m·K based on the polymer solid content. More preferably 50 to 90% by volume. If the thermally conductive filler is less than 30% by volume with respect to the polymer solid content, the thermal diffusion required for heating the windshield 2 may not be obtained. On the other hand, if the thermally conductive filler exceeds 95% by volume of the polymer solid content, the fluidity of the polymer matrix filled with the thermally conductive filler is reduced. is difficult to form. The thermal diffusion part 12 containing such a thermally conductive filler has a lower thermal conductivity than the thermally conductive filler itself due to being filled in the polymer matrix, but the thermal conductivity of the thermal diffusion part 12 is preferably greater than 0.8 W/m·K. This is for sufficiently heating the windshield 2 .

Such a thermal diffusion portion 12 can be formed by applying a liquid composition in which a polymer matrix is filled with a thermally conductive filler to the transparent substrate 10 by screen printing, metal plate printing, dispenser, or the like. .

The heat conducting wire forming the heat diffusion portion 12 is formed in a fine wire shape so as not to be reflected in the image of the vehicle-mounted camera 3 . As described above, by using a heat conductive filler with low saturation and high brightness, it is possible to suppress reflection in the image of the vehicle-mounted camera 3, but the heat conductive wire is fine wire-shaped. If so, it is possible to further prevent the thermal diffusion section 12 from being reflected in the image. Such a fine line shape can be formed, for example, with a thickness (line width) of 10 μm to 2000 μm, a thickness (film thickness) of 0.01 μm to 300 μm, and an interval between adjacent heat conducting lines of 1 mm to 50 mm.

Protective layer 13
The protective layer 13 is an electrically insulating film provided to protect the heating portion 11 and the thermal diffusion portion 12 formed on the transparent substrate 10 . The protective layer 13 is required to have transparency (visible light transmittance). This is to prevent it from being reflected in the image of the vehicle-mounted camera 3 . It can also be used to prevent the heating section 11 and the thermal diffusion section 12 from being oxidized or sulfurized.

The protective layer 13 is formed so as to cover the entire surface of the first surface 10 a of the transparent base material 10 including the heating portion 11 and the heat diffusion portion 12 . The protective layer 13 can be formed by screen printing, gravure printing, spray coating, or the like. The upper surface side of the protective layer 13 (the opposite surface side not facing the transparent substrate 10) is formed as a flat surface 13a. As a result, the adhesive layer 14 laminated on the flat surface 13a becomes an adhesive surface without unevenness, so that the antifogging heating element 1 can be neatly attached to the windshield 2. - 特許庁

The protective layer 13 is formed of a transparent resin, and for example, an acrylic, urethane, epoxy, polyolefin resin, or other resin can be used.

The thickness of the protective layer 13 is usually 6 μm to 30 μm, preferably 10 μm to 20 μm. The reason for this is that if the thickness exceeds 30 μm, the flexibility becomes poor, and if the thickness is less than 6 μm, the protection of the heating portion 11 and the thermal diffusion portion 12 may be insufficient. For the protective layer 13, a resin film made of the material exemplified for the transparent substrate 10 can also be used. The thickness of the resin film that forms the protective layer 13 is preferably 10 to 500 μm, more preferably 75 to 200 μm. If the thickness of the protective layer 13 is up to 500 μm, the strength of the antifogging heating element 1 can be obtained. On the other hand, there is little need to increase the strength as the thickness exceeds 500 μm. Furthermore, if the thickness of the protective layer 13 is less than 10 μm, the protection of the heating portion 11 and the thermal diffusion portion 12 may be insufficient.

Adhesive layer 14
The adhesive layer 14 is for adhering the anti-fogging heating element 1 to the windshield 2 . It is composed of this adhesive layer 14 and a transparent resin layer. The adhesive layer 14 can be formed by screen printing or the like. Note that the adhesive layer 14 may be further provided with a release film. Further, the adhesive layer 14 may be a double-sided tape, a curable adhesive, or the like, instead of being a layer formed of an adhesive.

Mounting Method of Antifogging Heating Element 1 and Arrangement Structure of Antifogging Heating Element 1 To mount the antifogging heat generating element 1 on the windshield 2 , an adhesive layer 14 is attached to a specific position on the windshield 2 . At this time, the wiring portion 11b extending from the transparent base material 10 is wired along an appropriate route in the passenger compartment of the vehicle so as not to be sandwiched between the anti-fogging heating element 1 and the windshield 2.

The mounting position of the anti-fogging heating element 1 on the windshield 2 is the position where the thermal diffusion part 12 is arranged in the front projection area r of the lens 3d of the vehicle-mounted camera 3 . As shown in FIG. 2, the windshield 2 and the interior surface 2a are inclined. Therefore, when the anti-fogging heating element 1 is attached to the windshield 2 and viewed from the front of the lens 3d of the vehicle-mounted camera 3 as indicated by arrow IV in FIG. Shorter apparent height. Therefore, the anti-fogging heating element 1 is mounted so that the front projection area r of the lens 3 d of the vehicle-mounted camera 3 is positioned inside the heat diffusion portion 12 .

Further, in this case, it is preferable to dispose the anti-fogging heating element 1 so that the front projection area r of the vehicle-mounted camera 3 with a viewing angle α in the vertical direction and the horizontal direction is located inside the thermal diffusion part 12 as much as possible. Such an arrangement structure of the anti-fogging heating element 1 can prevent the heating part 11 from being reflected in the image of the vehicle-mounted camera 3 .

In order to prevent the heating part 11 and the thermal diffusion part 12 from being reflected in the image of the vehicle-mounted camera 3, the anti-fogging heating element 1 should be positioned closer to the lens 3d than the near-field point of the depth of field of the vehicle-mounted camera 3. The anti-fogging heating element 1 and the vehicle-mounted camera 3 are arranged so as to be positioned at . According to this arrangement structure of the anti-fogging heating element 1, the anti-fogging heating element 1 can be out of the depth of field of the lens 3d of the vehicle-mounted camera 3 and out of the focus of the vehicle-mounted camera 3. 1 can be suppressed from being reflected in the image of the vehicle-mounted camera 3.

Effects According to the antifogging heating element 1, the following effects can be obtained.

The antifogging heating element 1 includes a transparent base material 10 and a heat diffusion part 12 . The transparent base material 10 is provided in front of the lens 3d of the vehicle-mounted camera 3 on the windshield 2 as a "transparent plate". The thermal diffusion part 12 is provided on the transparent base material 10, and is a "thermal diffusion path" (outer frame part 12a and mesh-like part) that heats the windshield 2 as a "transparent plate" by diffusing heat so as to include the front of the lens 3d. 12b). Therefore, the anti-fogging heating element 1 can heat the windshield 2 in front of the lens 3 d of the vehicle-mounted camera 3 .

Moreover, the anti-fogging heating element 1 can heat the front windshield 2 not the entire surface of the windshield 2 but specifically the front portion of the vehicle-mounted camera 3 (the front projection area r of the lens 3d).

Furthermore, the anti-fogging heating element 1 can remove the fog of the windshield 2 by heating and can suppress the fogging of the windshield 2 . Moreover, the anti-fogging heating element 1 can suppress not only dew condensation but also frosting and icing.

The anti-fogging heating element 1 includes a heating portion 11. The heating portion 11 is provided on the transparent base material 10 and is a "heat conductive portion" (main body portion 11a) that generates heat by conduction and transfers heat to the thermal diffusion portion 12. have Therefore, the anti-fogging heating element 1 can quickly transfer the heat generated by the heating part 11 when energized to the thermal diffusion part 12 to heat the "transparent plate" (the windshield 2).

The heating portion 11 has a main body portion 11a as an “outer heat generating portion” surrounding the thermal diffusion portion 12 . Therefore, the heat diffusion portion 12 for heating the windshield 2 can heat the windshield 2 quickly and effectively by conducting heat from the outside toward the center. In addition, since the heating part 11 surrounds the thermal diffusion part 12, heat can be transferred to the thermal diffusion part 12 more quickly and effectively.

The thermal diffusion part 12 is formed as a thermally conductive film containing an electrically insulating thermally conductive filler. Since the thermal diffusion part 12 is electrically insulating, it does not block transmission and reception of radio waves in various wireless data communications.

The heat conductive film (heat conductive wire) of the heat diffusion part 12 is formed of a coating film containing a heat conductive filler in a polymer matrix, and the heat conductive filler has a heat conductivity of 25 W/m·. It exceeds K. Therefore, the windshield 2 can be heated quickly and effectively.

The thermally conductive filler is made of a material with low chroma and high brightness, more specifically white or light gray. Therefore, it is possible to suppress reflection of the thermal diffusion unit 12 in the image of the vehicle-mounted camera 3 .

The thermally conductive film (thermally conductive wire) of the thermal diffusion part 12 is a thermally conductive filler that is an anisotropic shaped (for example, fibrous or scaly) powder, and the extension direction (longitudinal direction) of the thermally conductive filler is oriented in a specific direction. can be formed as According to this, by orienting the thermally conductive filler along, for example, the extension direction of the thermally conductive film, the thermally conductive film can have higher thermal conductivity efficiency.

The anti-fogging heating element 1 is arranged so that the thermal diffusion part 12 is located in the forward projection area r of the lens 3d of the vehicle-mounted camera 3 on the windshield 2 as a "transparent plate". According to this, even if the installation angle of the "transparent plate" obliquely intersects the optical axis of the lens 3d of the vehicle-mounted camera 3, the portion of the windshield 2 corresponding to the forward projection area r of the lens 3d is prevented. Heating can be reliably performed by the fog heating element 1. - 特許庁

Second embodiment [Fig. 6A]

The antifogging heating element 20 of the second embodiment is common in that it includes a transparent substrate 10, a heating section 21, a heat diffusion section 12, a protective layer 13, and an adhesive layer 14, as in the first embodiment. do. Also, the mounting method and arrangement structure of the antifogging heating element 20 are also common to the first embodiment. On the other hand, the antifogging heating element 20 differs from the first embodiment in the configuration of the heating portion 21 .

The heating unit 21 of this embodiment does not have the upper wiring 11a1, and has a structure in which a pair of side wirings 21a2 and 21a3 and a lower wiring 21a4 form the main body 21a. The wiring portion 11b is connected to the body portion 21a.

According to the anti-fogging heating element 20, the heating part 21 is composed of the pair of side wirings 21a2 and 21a3 and the lower wiring 21a4, so the possibility that the heating part 21 is reflected in the image of the vehicle-mounted camera 3 is reduced. be able to.

Third embodiment [Fig. 6B]

The anti-fogging heating element 30 of the third embodiment is common in that it includes a transparent substrate 10, a heating section 31, a heat diffusion section 32, a protective layer 13, and an adhesive layer 14, as in the first embodiment. do. Also, the mounting method and arrangement structure of the antifogging heating element 30 are also common to the first embodiment. On the other hand, the antifogging heating element 30 differs from the first embodiment in the configuration of the heating portion 31 and the thermal diffusion portion 32 .

The heating unit 31 has the same configuration as the heating unit 21 of the second embodiment. That is, the heating portion 31 is configured such that a pair of side wirings 31a2 and 31a3 and a lower wiring 31a4 form a main body portion 31a. The wiring portion 11b is connected to the body portion 31a.

The thermal diffusion portion 32 is formed only by the mesh portion 32b. Also, the thermal diffusion part 32 is directly connected to the heating part 31 . Specifically, the net-like portion 32b has a vertical line 32b1 and a horizontal line 32b2. Also, the lower end of the vertical line 32b1 is directly connected to the lower wiring 31a4 of the heating unit 31. As shown in FIG.

According to the anti-fogging heating element 30 as described above, since the heating portion 31 and the thermal diffusion portion 32 are directly connected, the heat generated by the heating portion 31 can be directly transmitted to the thermal diffusion portion 32 . Therefore, the windshield 2 can be heated quickly and efficiently.

Fourth Embodiment [Fig. 7A]

The anti-fogging heating element 40 of the fourth embodiment is common in that it includes the transparent substrate 10, the heating section 41, the thermal diffusion section 12, the protective layer 13, and the adhesive layer 14, as in the first embodiment. do. Also, the mounting method and arrangement structure of the antifogging heating element 40 are also common to the first embodiment. On the other hand, the antifogging heating element 40 differs from the first embodiment in the configuration of the heating portion 41 .

The heating portion 41 has a main body portion 41a having an upper wiring 41a1 and a pair of wiring portions 41b. The upper wiring 41a1 is formed to connect the pair of wiring portions 41b. The wiring portion 41b and the upper wiring 41a1 are directly connected to the outer frame portion 12a of the thermal diffusion portion 12 and the vertical lines 12b of the mesh portion 12b.

According to the anti-fogging heating element 40, the heating part 41 is composed of the wiring part 41b and the upper wiring 41a1 existing only in the portion therebetween. can be reduced.

Fifth embodiment [Fig. 7B]

The anti-fogging heating element 50 of the fifth embodiment is common in that it includes the transparent substrate 10, the heating section 51, the thermal diffusion section 12, the protective layer 13, and the adhesive layer 14, as in the first embodiment. do. Also, the mounting method and arrangement structure of the antifogging heating element 50 are also common to the first embodiment. On the other hand, the antifogging heating element 50 differs from the first embodiment in the configuration of the heating portion 51 .

The heating portion 51 has a main body portion 51a and a wiring portion 51b. Here, the body portion 51a has only an upper wiring 51a1 having substantially the same length as one side of the outer frame portion 12a of the heat diffusion portion 12. As shown in FIG. The wiring portion 51b is further connected to the wiring 51a1. Further, the vertical lines 12b1 of the mesh portion 12b of the heat diffusion portion 12 are directly connected to the upper wiring 51a1.

Since the anti-fogging heating element 50 has only the upper wiring 51a1, the possibility that the heating part 51 is reflected in the image of the vehicle-mounted camera 3 can be reduced.

The vertical lines 12 b 1 of the mesh portion 12 b of the heat diffusion portion 12 are directly connected to the heating portion 51 . The outer frame portion 12 a is also directly connected to the heating portion 51 . Therefore, the heat generated by the heating portion 51 can be directly transferred to the thermal diffusion portion 12 . Therefore, the windshield 2 can be heated quickly and efficiently. The upper wiring 51a1, which extends outward from the wiring portion 51b, does not conduct current, but has thermal conductivity, so that heat is easily spread to the end of the outer frame portion 12a.

Sixth Embodiment [Fig. 8A]

The anti-fogging heating element 60 of the sixth embodiment includes the transparent substrate 10, the heating section 11, the heat diffusion section 62, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 60 are also common to the first embodiment. On the other hand, the antifogging heating element 60 differs from the first embodiment in the configuration of the heat diffusion portion 62 .

The thermal diffusion part 62 has an outer frame part 62 a and a mesh part 62 b that are directly connected to the heating part 11 . That is, both ends of the outer frame portion 62a and the vertical lines 62b1 and the horizontal lines 62b2 of the mesh portion 62b are all directly connected to the heating portion 11. As shown in FIG.

According to the anti-fogging heating element 60, since all the heat conduction wires forming the heat diffusion portion 62 are directly connected to the heating portion 11, the heat generated by the heating portion 11 can be quickly transferred to the heat diffusion portion 62. can. Therefore, the windshield 2 can be heated quickly and efficiently.

Seventh embodiment [Fig. 8B]

The anti-fogging heating element 70 of the seventh embodiment includes the transparent substrate 10, the heating section 11, the heat diffusion section 72, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 70 are also common to the first embodiment. On the other hand, the antifogging heating element 70 differs from the first embodiment in the configuration of the heat diffusion portion 72 .

The heat diffusion portion 72 has an outer frame portion 72a and a mesh portion 72b. Of these, the outer frame portion 72a is formed in a wide strip shape, as indicated by cross hatching in FIG. 8B. The wide band shape is specifically formed to have a width corresponding to the space between the mesh portion 72b and the heating portion 11. As shown in FIG. The outer frame portion 72a is in contact with and directly connected to the heating portion 11 at its sides.

According to the anti-fogging heating element 70, since the outer frame portion 72a of the wide band-shaped heat diffusion portion 72 and the heating portion 11 are directly connected, the heat generated by the heating portion 11 can be quickly transferred to the heat diffusion portion 72. can be done. Therefore, the windshield 2 can be heated quickly and efficiently. Further, since the outer frame portion 72a of the heat diffusion portion 72 has a strip shape instead of a thin wire shape, the side (outer edge) can be in contact with the heating portion 11 in a long and wide manner, and the heat generation of the heating portion 11 can be more rapidly performed by the mesh portion 72b. can tell

Eighth embodiment [Fig. 9A]

The anti-fogging heating element 80 of the eighth embodiment includes the transparent substrate 10, the heating section 11, the heat diffusion section 82, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 80 are also common to the first embodiment. On the other hand, the antifogging heating element 80 differs from the first embodiment in the configuration of the heat diffusion portion 82 .

The heat diffusion portion 82 is formed so that the vertical lines 82b1 of the mesh portion 82b do not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3. As shown in FIG. That is, the vertical lines 82b1 have uneven pitch portions. The horizontal lines 82b2 of the mesh portion 82b are formed at equal intervals as in the first embodiment.

According to the anti-fogging heating element 80, the vertical line 82b1 does not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3, so that the vertical line 82b1 can be prevented from being reflected in the image of the vehicle-mounted camera 3.

Ninth embodiment [Fig. 9B]

The anti-fogging heating element 90 of the ninth embodiment includes the transparent substrate 10, the heating section 11, the heat diffusion section 92, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 90 are also common to the first embodiment. On the other hand, the antifogging heating element 90 differs from the first embodiment in the configuration of the heat diffusion portion 92 .

The heat diffusion portion 92 is formed so that the horizontal lines 92b2 of the mesh portion 92b do not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3. As shown in FIG. That is, the horizontal line 92b2 has uneven pitch portions. The vertical lines 92b1 of the mesh portion 92b are formed at equal intervals as in the first embodiment.

According to the anti-fogging heating element 90, the horizontal line 92b2 does not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3, so that the horizontal line 92b2 can be prevented from being reflected in the image of the vehicle-mounted camera 3.

Tenth embodiment [Fig. 10]

The anti-fogging heating element 100 of the tenth embodiment is provided with a transparent base material 10, a heating section 11, a heat diffusion section 102, a protective layer 13, and an adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 100 are also common to the first embodiment. On the other hand, the antifogging heating element 100 differs from the first embodiment in the configuration of the thermal diffusion portion 102 .

The heat diffusion portion 102 is formed so that neither the vertical lines 102b1 nor the horizontal lines 102b2 of the mesh portion 102b pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3. That is, the vertical lines 102b1 and the horizontal lines 102b2 each have uneven pitch portions.

According to the anti-fogging heating element 100, as shown in FIG. 10B, the vertical lines 102b1 and the horizontal lines 102b2 do not pass through the forward projection area r of the lens 3d of the vehicle-mounted camera 3, so that the net-like portion 102b is reflected in the image of the vehicle-mounted camera 3. can be prevented from entering.

Eleventh embodiment [Fig. 11]

The anti-fogging heating element 110 of the eleventh embodiment is provided with the transparent substrate 10, the heating section 11, the thermal diffusion section 112, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 110 are also common to the first embodiment. On the other hand, the antifogging heating element 110 differs from the first embodiment in the configuration of the thermal diffusion portion 112 .

The heat diffusion portion 112 is formed so that neither the vertical lines 112b1 nor the horizontal lines 112b2 of the mesh portion 112b pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3. As shown in FIG. That is, the vertical lines 112b1 and the horizontal lines 112b2 each have an uneven pitch portion. Further, the mesh portion 112b has narrow-pitch wiring portions 112b3 and 112b4 in which the wiring intervals between the vertical lines 112b1 and the horizontal lines 112b2 are narrowed in the peripheral portion of the front projection area r.

According to the anti-fogging heating element 110, the vertical lines 112b1 and the horizontal lines 112b2 do not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3, so that the mesh portion 112b is prevented from being reflected in the image of the vehicle-mounted camera 3. can.

According to the antifogging heating element 110, since the mesh portion 112b has the narrow pitch wiring portions 112b3 and 112b4, these portions can be heated particularly quickly. In particular, since the vertical lines 112b1 and the horizontal lines 112b2 do not pass through the front projection area r of the lens 3d of the vehicle-mounted camera 3, the heating is weak. It is possible to reliably heat r and its surroundings.

Twelfth embodiment [Fig. 12A]

The anti-fogging heating element 120 of the twelfth embodiment is similar to the first embodiment in that it includes a transparent base material 10, a heating section 121, a thermal diffusion section 12, a protective layer 13, and an adhesive layer 14. Common. Also, the mounting method and arrangement structure of the antifogging heating element 120 are also common to the first embodiment. On the other hand, the antifogging heating element 120 differs from the first embodiment in the configuration of the heating portion 121 .

The heating section 121 is provided inside the thermal diffusion section 12 . That is, the heating portion 121 is provided at a position overlapping the mesh portion 12b of the thermal diffusion portion 12, and the body portion 121a and the mesh portion 12b intersect.

According to the antifogging heating element 120 , the heating section 121 is arranged inside the thermal diffusion section 12 . Therefore, heat can be transferred from the inside of the thermal diffusion portion 12 to the thermal diffusion portion 12 , so that the heat generated by the heating portion 121 can be rapidly transferred to the thermal diffusion portion 12 . Therefore, the windshield 2 can be heated quickly and efficiently.

13th embodiment [Fig. 12B]

The anti-fogging heating element 130 of the thirteenth embodiment is provided with the transparent substrate 10, the heating section 131, the thermal diffusion section 132, the protective layer 13, and the adhesive layer 14, as in the first embodiment. Common. Also, the mounting method and arrangement structure of the antifogging heating element 130 are also common to the first embodiment. On the other hand, the antifogging heating element 130 differs from the first embodiment in the configuration of the heating portion 131 and the thermal diffusion portion 132 .

In the heating part 131, the side wirings 131a2 and 131a3 and the lower wiring 131a4 are formed closer to the center of the transparent substrate 10 than in the first embodiment. The thermal diffusion part 132 has a net-like part 132 b formed on the entire surface of the transparent base material 10 . Therefore, the heating section 131 is provided inside the thermal diffusion section 132 . That is, the heating portion 131 is provided at a position overlapping with the mesh portion 132b of the thermal diffusion portion 132, and the body portion 131a and the mesh portion 132b intersect.

According to the antifogging heating element 130 , the heating section 131 is arranged inside the thermal diffusion section 132 . Therefore, since heat can be transferred from the inside of the thermal diffusion portion 132 to the thermal diffusion portion 132 , the heat generated by the heating portion 131 can be rapidly transferred to the thermal diffusion portion 132 . Therefore, the windshield 2 can be heated quickly and efficiently.

Since the heat diffusion part 132 has the mesh part 132 b formed on the entire surface of the transparent base material 10 , the front windshield 2 can be heated by the entire surface of the anti-fogging heating element 130 . .

14th embodiment [Fig. 13]

In the first embodiment, an example in which the anti-fogging heating element 1 is attached to the interior surface 2a of the windshield 2 as a "transparent plate" is shown. A windshield 142 provided within the plate thickness as "laminated glass" is shown.

The windshield 142 includes a first glass member 142a on the indoor side, a second glass member 142b on the outdoor side, and an intermediate glass member made of a resin film arranged between the first glass member 142a and the second glass member 142b. and a membrane 142c. The intermediate film 142c has a concave portion 142c1 which is missing in conformity with the outer shape of the antifogging heating element 1 for disposing the antifogging heating element 1, and the antifogging heating element 1 is arranged in the concave portion 142c1.

According to the windshield 142 as "vehicle laminated glass", by heating the windshield 142 from within the plate thickness, the same effect as the anti-fogging heating element 1 of the first embodiment can be exhibited. In addition, since the anti-fogging heating element 1 is built in the windshield 142, retrofitting work is not required, and it will not peel off due to aging.

15th embodiment [Fig. 14]

In the first embodiment, an example in which the anti-fogging heating element 1 is attached to the interior surface 2a of the windshield 2 as a "transparent plate" is shown, but in the present embodiment, the anti-fogging heating element 151 is used as "vehicle laminated glass". shows a windshield 152 provided within the thickness of .

The windshield 152 includes a first glass member 152a on the indoor side, a second glass member 152b on the outdoor side, and an intermediate glass member made of a resin film arranged between the first glass member 152a and the second glass member 152b. and a membrane 152c. The intermediate film 152c serves as the “transparent base material” of the antifogging heating element 151. As shown in FIG. That is, the anti-fogging heating element 151 is formed on the intermediate film 152c as a "transparent base material".

According to the windshield 152 as "vehicle laminated glass", by heating the windshield 152 from within the plate thickness, the same effect as the anti-fogging heating element 1 of the first embodiment can be achieved. In addition, since the anti-fogging heating element 151 is built in the windshield 152, it does not need to be retrofitted and will not peel off due to aging.

According to the windshield 152 as "vehicle laminated glass", the intermediate film 152c is the "transparent base material" of the anti-fogging heating element 151, so the anti-fogging heating element 151 can be directly formed on the intermediate film 152c. , the windshield 152 having the intermediate film 152c can be made multi-functional and its added value can be increased.

16th embodiment [Fig. 15]

In the first embodiment, an example in which the anti-fogging heating element 1 is attached to the interior surface 2a of the windshield 2 as a "transparent plate" is shown, but in the present embodiment, the anti-fogging heating element 161 is used as "vehicle laminated glass". shows a windshield 162 provided within the thickness of .

The windshield 162 includes a first glass member 162a on the indoor side, a second glass member 162b on the outdoor side, and an intermediate glass member made of a resin film arranged between the first glass member 162a and the second glass member 162b. and a membrane 162c. The indoor-side first glass member 162 a constitutes the “transparent base material” of the anti-fogging heating element 161 . That is, the anti-fogging heating element 161 is formed on the first glass member 162a as a "transparent base material".

According to the windshield 162 as "vehicle laminated glass", the same effect as the anti-fogging heating element 1 of the first embodiment can be obtained by heating the windshield 162 from within the plate thickness. Further, since the anti-fogging heating element 161 is built in the windshield 162, retrofitting work is not required, and it will not peel off due to aging.

According to the windshield 162 as "vehicle laminated glass", the first glass member 162a on the interior side is the "transparent base material" of the anti-fogging heating element 161. The body 161 can be directly configured, and the windshield 162 can be multi-functionalized to increase its added value.

Other embodiments and modifications

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be embodied in various ways.

In the above embodiment, the vehicle-mounted camera 3 is exemplified. However, the problem of blurred images due to dew condensation etc. is not unique to the vehicle-mounted camera 3 used in vehicles, but rather various machines, such as ships, where a transparent plate (glass, transparent resin plate) is installed in front of the camera lens. , aircraft, railroads, motorcycles and machine tools. Therefore, the antifogging heating element 1 of the above-described embodiment may be attached not only to a "transparent plate" provided to a vehicle but also to a "transparent plate" provided to a ship, an aircraft, a railroad, or the like.

In the above-described embodiment, the vehicle-mounted camera 3 for a drive recorder is illustrated as the "camera" and the "vehicle camera device", but a stereo camera used for advanced driver-assistance systems (ADAS) may also be used. A stereo camera includes a plurality of lenses (usually two lenses) that are spaced apart from each other and capable of forming parallax in a camera housing. In such a stereo camera having a plurality of lenses, at least the front projection portion of each lens on the transparent plate needs to be anti-fogged. Therefore, the anti-fogging heating element 1 is formed to have a size corresponding to each of the plurality of lenses.

In the above-described embodiment, the windshield 2 is exemplified as the "transparent plate" to which the antifogging heating element 1 is attached, but the rear glass or other vehicle glass may be the attachment target. Moreover, you may install in the transparent window part for cameras provided in the resin-made exterior decoration board of a vehicle.

In the above-described embodiment, the transparent substrate 10 and the main body portion 11a of the heating portion 11 are square, but they may be polygonal, circular, elliptical, or the like. Further, for example, the upper end portion of the transparent base material 10 may have a shape having a concave portion for avoiding interference with the fixed portion 3a of the vehicle-mounted camera 3 and a concave portion for avoiding interference with the fixed portion of the rearview mirror. Furthermore, the size of the antifogging heating element 1 in the above embodiment is an example, and may be formed larger than in the above embodiment. As an example, a configuration in which the heat diffusion portion 12 is provided over the entire surface of the windshield 2 may be employed. According to this, the windshield 2 can be heated over a wide area to prevent fogging.

In the above-described embodiment, an example in which the net-like portion 12b of the heat diffusion portion 12 is formed in a net shape has been shown, but instead of a net shape formed by straight heat conduction lines, bent lines with corners, curved wavy lines, etc. are used. The net-like portion 12b can also be formed of heat-conducting wires. Alternatively, the net-like portion 12b may be formed of a plurality of heat-conducting wires in which straight lines, curved lines, wavy lines, etc. are appropriately combined.

Instead of the mesh portion 12b, the heat diffusion portion 12 can also be formed in a striped shape in which a plurality of heat conduction lines having neither the vertical lines 12b1 nor the horizontal lines 12b2 are arranged in parallel. In this case, the outer frame portion 12a may be provided or may not be provided. Also, the heat diffusion portion 12 can be formed in a multi-concentric ripple shape instead of the mesh portion 12b.

1 Anti-fogging heating element (first embodiment)
2 Windshield 2a Interior surface 2b First glass member 2c Second glass member 2d Intermediate film 3 In-vehicle camera 3a Fixing part 3b Supporting part 3c Camera body 3d Lens 10 Transparent substrate 10a First surface 11 Heating part 11a Body part 11a1 Upper wiring 11a2 Side wiring 11a3 Side wiring 11a4 Lower wiring 11b Wiring part 12 Thermal diffusion part 12a Outer frame part 12b Net-like part 12b1 Vertical line 12b2 Horizontal line 13 Protective layer 13a Surface 14 Adhesive layer 20 Antifogging heating element (second embodiment)
21 Heating Part 21a Body Part 21a2 Side Wiring 21a3 Side Wiring 21a4 Bottom Wiring 30 Antifogging Heating Element (Third Embodiment)
31 heating part 31a body part 31a2 side wiring 31a3 side wiring 31a4 lower wiring 32 thermal diffusion part 32b net-like part 32b1 vertical line 32b2 horizontal line 40 anti-fogging heating element (fourth embodiment)
41 Heating Part 41a Body Part 41a1 Upper Wiring 41b Wiring Part 50 Antifogging Heating Element (Fifth Embodiment)
51 heating part 51a body part 51a1 upper wiring 51b wiring part 60 anti-fogging heating element (sixth embodiment)
62 Thermal diffusion part 62a Outer frame part 62b Reticulated part 62b1 Vertical line 62b2 Horizontal line 70 Antifogging heating element (seventh embodiment)
72 Thermal diffusion part 72a Outer frame part 72b Reticulated part 80 Antifogging heating element (eighth embodiment)
82 Thermal diffusion part 82b Net-like part 82b1 Vertical line 82b2 Horizontal line 90 Antifogging heating element (ninth embodiment)
92 Thermal diffusion part 92b Net-like part 92b1 Vertical line 92b2 Horizontal line 100 Anti-fogging heating element (tenth embodiment)
102 Thermal diffusion portion 102b Mesh portion 102b1 Vertical line 102b2 Horizontal line 110 Antifogging heating element (11th embodiment)
112 Heat diffusion portion 112b Mesh portion 112b1 Vertical line 112b2 Horizontal line 112b3 Narrow pitch wiring portion 112b4 Narrow pitch wiring portion 120 Antifogging heating element (12th embodiment)
121 Heating part 121a Body part 121b Wiring part 130 Anti-fogging heating element (13th embodiment)
131 heating portion 131a body portion 132 heat diffusion portion 132b mesh portion 131a2 side wiring 131a3 side wiring 131a4 lower wiring 142 windshield (14th embodiment)
142a First glass member 142b Second glass member 142c Intermediate film 142c1 Concave portion 200
151 Anti-fog heating element (15th embodiment)
152 Windshield 152a First glass member 152b Second glass member 152c Intermediate film (transparent substrate)
161 Anti-fog heating element (16th embodiment)
162 Windshield 162a First glass member 162b Second glass member 162c Intermediate film (transparent substrate)

Claims (11)

An anti-fogging heating element that heats a transparent plate positioned in front of a camera lens to prevent fogging,
comprising a transparent base material and a heat diffusion part,
The transparent base material is provided in front of the lens on the transparent plate,
The thermal diffusion part is provided in the transparent base material and has a thermal diffusion path for heating the transparent plate by diffusing heat so as to include the front of the lens. The anti-fogging heating element further comprises a heating unit,
2. The anti-fogging heating element according to claim 1, wherein said heating portion has a heat-generating conductive portion which is provided on said transparent substrate and which generates heat by conduction and transfers heat to said thermal diffusion portion. 3. The antifogging heating element according to claim 2, wherein said heating portion has an outer edge heating portion surrounding said thermal diffusion portion. The antifogging heating element according to claim 2 or 3, wherein the heating section has an inner heating section that passes through the thermal diffusion section. The antifogging heating element according to any one of claims 1 to 4, wherein the heat diffusion portion is an electrically insulating heat conductive film. The antifogging heating element according to any one of claims 1 to 5, wherein the heat diffusion portion is formed in a striped shape having a plurality of heat conducting lines arranged in parallel. The anti-fogging heating element according to any one of claims 1 to 5, wherein the heat diffusion portion is formed in a net shape having a plurality of cross-arranged heat conducting lines. The transparent base material is a transparent resin film,
The heating part is a heat-generating conductive part provided on the resin film,
The antifogging heating element according to any one of claims 1 to 7, wherein the heat diffusion portion is a heat conductive film provided on the resin film. The transparent base material is a transparent glass member,
The heating part is a heat-generating conductive part provided on the glass member,
The antifogging heating element according to any one of claims 1 to 7, wherein the heat diffusion portion is a heat conductive film provided on the glass member. A laminated glass for a vehicle,
a first glass member;
a second glass member;
The anti-fogging heating element according to any one of claims 1 to 8 arranged between the first glass member and the second glass member,
Laminated glass for vehicles. An in-vehicle camera device,
A camera that shoots the outside of the vehicle through a transparent plate that separates the inside and outside of the vehicle,
An anti-fogging heating element according to any one of claims 1 to 9,
The anti-fogging heating element is provided at a position where the thermal diffusion portion of the transparent plate faces the lens of the camera.
In-vehicle camera device.

Images