JP2007223369A - Glare-proof mirror - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glare-proof mirror capable of enlarging an effective view-field area of a mirror body. <P>SOLUTION: It is possible to enlarge the effective view-field area of the mirror body 12 (area of part on which a reflecting image is reflected) as an additional reflecting film 22 is formed on the outside of an outer periphery of a reflecting electrically conductive film 20 on this electro-chromic mirror. Additionally, a first terminal 28 to connect an electric power source to an ITO film 16 and the reflecting electrically conductive film 20 and a second terminal which is not shown in the drawing are provided on the opposite side of a glass substrate 14 against the additional reflecting film 22, and consequently, it is not necessary to provide a frame to hide the terminal on the surface side of the glass substrate as conventionally and accordingly, it is possible to extend the effective view-field area of the mirror body 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rear viewing mirror used in a vehicle such as an automobile, and more particularly to an antiglare mirror capable of changing the reflectance of light.

  In a conventional anti-glare mirror (see, for example, Patent Document 1), a transparent conductive film, an electrochromic film, and a reflective conductive film are formed on the back surface of a glass substrate that constitutes the mirror body, and the electrochromic film Is colored when a voltage is applied between the transparent electrode film and the reflective conductive film. For this reason, the light incident on the glass substrate from the surface side and reflected by the reflective conductive film is reduced in brightness when passing through the electrochromic film.

By the way, in such an antiglare mirror, a plurality of terminals for applying a voltage to the transparent conductive film and the reflective conductive film are attached to the outer peripheral portion of the glass substrate, and a plurality of terminals are provided on the surface side of the glass substrate. There is a picture frame to hide. For this reason, the effective visual interface area (that is, the area of the portion where the reflected image is reflected) of the mirror body is narrowed by the amount of the frame.
JP-A-10-71891

  In view of the above facts, an object of the present invention is to obtain an antiglare mirror capable of expanding the effective visual interface of the mirror body.

  In order to solve the above problems, an antiglare mirror according to a first aspect of the present invention includes a transparent substrate constituting a mirror body, a transparent conductive film formed on the back surface of the substrate, and an outer peripheral portion of the transparent conductive film. Is formed on the opposite side of the substrate with respect to the transparent conductive film, and the transparent conductive film and the transparent conductive film A light-reducing film formed between a reflective conductive film and changing light transmittance when a voltage is applied between the transparent conductive film and the reflective conductive film, and formed on the outer periphery of the reflective conductive film And an additional reflective film having a light reflecting surface on the substrate side, and provided on the opposite side of the substrate with respect to the additional reflective film and having conductivity, directly or indirectly on the outer peripheral portion of the transparent conductive film First terminals connected to each other and provided on the back side of the substrate. With electrically conductive, it is characterized by comprising a second terminal coupled to the reflective conductive film.

  In the antiglare mirror according to claim 1, when a power source is connected to the first terminal and the second terminal, a voltage is applied between the transparent conductive film and the reflective conductive film, and the light transmittance of the dimming film is reduced. Change. For this reason, the light incident on the substrate from the surface side and reflected by the light reflecting surface of the reflective conductive film is changed in brightness according to the light transmittance of the light reducing film. Here, in this anti-glare mirror, since the additional reflection film is formed outside the outer periphery of the reflection conductive film, the effective visual interface area (that is, the area of the portion where the reflected image is reflected) of the mirror body can be increased. In addition, since the first terminal is provided on the side opposite to the substrate (the back side of the substrate) with respect to the additional reflection film, and the second terminal is provided on the back side of the substrate, the terminal is provided like a conventional anti-glare mirror. It is not necessary to provide a frame for concealing on the surface side of the substrate, and this can also increase the effective visual interface area of the mirror body.

  An anti-glare mirror according to a second aspect of the present invention is the anti-glare mirror according to the first aspect, wherein the additional reflective film is formed on the substrate side of the transparent conductive film.

  In the anti-glare mirror according to claim 2, since the additional reflective film is formed on the substrate side of the transparent conductive film, the outer peripheral portion of the transparent conductive film is exposed on the back side of the substrate and the first terminal is connected. Can do.

  The antiglare mirror of the invention according to claim 3 is the antiglare mirror according to claim 1, wherein the additional reflective film is formed on the opposite side of the transparent conductive film from the substrate and has conductivity. The first terminal is connected to the additional reflective film.

  In the anti-glare mirror according to claim 3, since the additional reflective film having conductivity is formed on the side opposite to the substrate of the transparent conductive film, the first terminal can be connected to the transparent conductive film via the additional reflective film. .

  The antiglare mirror of the invention according to claim 4 is a transparent substrate constituting a mirror body, a transparent conductive film formed on the back surface of the substrate, and an outer peripheral portion of the transparent conductive film exposed to the back surface side of the substrate. And formed between the transparent conductive film and the reflective conductive film. The reflective conductive film is formed on the opposite side of the transparent conductive film with respect to the transparent conductive film. A light-reducing film whose light transmittance is changed by applying a voltage between the transparent conductive film and the reflective conductive film, and provided on the opposite side of the substrate with respect to the reflective conductive film, A protective plate that is supported by the substrate, protects the transparent conductive film, the light-reducing film, and the reflective conductive film, and is provided on the back side of the substrate, and is formed in a U shape and has conductivity. The pair of leg pieces facing each other sandwich the outer periphery of the protective plate And the first terminal includes a first terminal and a second terminal disposed between the substrate and the protective plate, wherein the first terminal includes the one leg. The outer side of the piece is connected to the outer peripheral portion of the transparent conductive film, and the second terminal is characterized in that the outer side of the one leg piece is connected to the reflective conductive film.

  In the anti-glare mirror according to claim 4, when a power source is connected to the first terminal and the second terminal, a voltage is applied between the transparent conductive film and the reflective conductive film, and the light transmittance of the dimming film is reduced. Change. For this reason, the light incident on the substrate from the surface side and reflected by the light reflecting surface of the reflective conductive film is changed in brightness according to the light transmittance of the light reducing film. Here, in this anti-glare mirror, since the first terminal and the second terminal are provided on the back side of the substrate, it is necessary to provide a frame for concealing the terminal on the front side of the substrate like the conventional anti-glare mirror. Thus, the effective visual interface area of the mirror body (that is, the area of the portion where the reflected image is reflected) can be increased. Moreover, the first terminal and the second terminal are formed in a U shape, and a pair of leg pieces facing each other are attached to the protective plate by sandwiching the outer peripheral portion of the protective plate. For this reason, the first terminal and the second terminal can be firmly attached to the protective plate.

  The antiglare mirror of the invention according to claim 5 is the antiglare mirror according to claim 4, further comprising an additional reflective film formed on the outer periphery of the reflective conductive film, the substrate side being a light reflective surface, The first terminal is provided on a side opposite to the substrate with respect to the additional reflective film.

  In the antiglare mirror according to the fifth aspect, since the additional reflective film is formed on the outer periphery of the reflective conductive film, the effective visual interface area of the mirror body can be enlarged. In addition, since the first terminal is provided on the side opposite to the substrate (the back side of the substrate) with respect to the additional reflective film, there is no need to provide a member for hiding the first terminal on the surface side of the substrate. Can also enlarge the effective visual interface area of the mirror body.

  The antiglare mirror of the invention according to claim 6 is the antiglare mirror according to claim 4 or claim 5, wherein the first terminal has a protrusion formed on the outer side of the one leg piece, The protrusion is connected to the transparent conductive film and generates a gap between the one leg piece and the reflective conductive film.

  In the anti-glare mirror according to claim 6, since the first terminal has a protrusion that creates a gap between the one leg piece and the reflective conductive film, the one leg piece and the reflective conductive film are short-circuited. Can be prevented.

  An anti-glare mirror according to a seventh aspect of the present invention is the anti-glare mirror according to any one of the fourth to sixth aspects, wherein the second terminal has the reflective conductive film on the outer side of the one leg piece. The connection surface is bonded to the reflective conductive film with an adhesive having conductivity.

  In the antiglare mirror according to claim 7, the connection surface provided on one terminal of the second terminal is bonded to the reflective conductive film with an adhesive having conductivity, and the second terminal and the reflective conductive film are It is in surface contact. For this reason, even when a load directed to the substrate side acts on the second terminal, it is possible to suppress the second terminal from breaking through the reflective conductive film and the light-reducing film and short-circuiting the second terminal and the transparent conductive film.

  As described above, in the antiglare mirror according to the present invention, the effective visual interface area of the mirror body can be enlarged.

<First Embodiment>
FIG. 1 is a plan view showing a configuration of the surface side of a mirror body 12 of an electrochromic mirror 10 as an antiglare mirror according to the first embodiment of the present invention. FIG. 2 is a plan view showing the configuration of the back surface side of the mirror body 12. Further, FIG. 3 shows a cross-sectional view taken along line 3-3 in FIG. 2, and FIG. 4 shows a cross-sectional view taken along line 5-5 in FIG.

  The electrochromic mirror 10 according to the first embodiment of the present invention constitutes a door mirror device of an automobile, and the mirror body 12 of the electrochromic mirror 10 is formed in a rectangular plate shape with colorless and transparent glass. A glass substrate 14 is provided. The back side of glass substrate 14 (upper side in FIGS. 3 and 4) is made of an ITO (indium tin oxide) film 16 as a transparent conductive film, an electrochromic film 18 as a light reducing film, and aluminum. Each of the reflective conductive films 20 having the property is formed in a laminated form in order by a method such as ion plating.

The electrochromic film 18 is colored / decolored by a reversible oxidation / reduction reaction obtained by applying a voltage between the ITO film 16 and the reflective conductive film 20, and the light transmittance is obtained by this coloring / decoloration. Is something that changes. Such an electrochromic film 18 is generally formed of an oxidation coloring material such as iridium oxide (IrOx) or nickel oxide (NiO), a solid electrolyte such as tantalum pentoxide (Ta ₂ O ₅ ), and tungsten trioxide (WO ₃ ). And a three-layer structure composed of a reducing color former such as molybdenum trioxide (MoO ₃ ). In the first embodiment, the surface of the mirror body 12 is normally colorless (when no voltage is applied), and the electrochromic film 18 is IrOx-Ta so that the surface changes to blue when anti-glare (when voltage is applied). The three-layer structure of ₂ O ₅ —WO ₃ is configured to be sandwiched between the front and back surfaces of the ITO film 16 and the reflective conductive film 20.

  The reflective conductive film 20 has a light reflecting surface on the surface on the glass substrate 14 side. Therefore, light incident on the glass substrate 14 from the surface side, transmitted through the ITO film 16 and the electrochromic film 18, and reflected by the reflective conductive film 20 (see arrow L1 in FIGS. 3 and 4) is electrochromic film. At the time of coloring 18, the reflectance is lowered, and thereby an antiglare effect is obtained.

  In the first embodiment, the ITO film 16 is formed over the entire back surface of the glass substrate 14, but the electrochromic film 18 and the reflective conductive film 20 are formed in the center of the glass substrate 14, An additional reflective film 22 made of aluminum or the like and having conductivity is formed on the opposite side of the ITO film 16 from the glass substrate 14 and outside the outer periphery of the reflective conductive film 20. The additional reflective film 22 is formed by superposing (overlapping) the inner peripheral portion thereof in the film thickness direction with respect to the outer peripheral portions of the electrochromic film 18 and the reflective conductive film 20, and the surface on the glass substrate 14 side is light. The reflection surface is used, and light (see arrow L2 in FIGS. 3 and 4) incident on the outer peripheral portion of the glass substrate 14 from the surface side is reflected by the additional reflection film 22. For this reason, in the first embodiment, the reflective conductive film 20 and the additional reflective film 22 make the entire surface of the mirror body 12 a reflective surface.

  Further, a glass plate 24 as a protective plate formed in a rectangular plate shape is disposed on the side opposite to the glass substrate 14 with respect to the reflective conductive film 20, and this glass plate 24 is reflected and conductive by a sealing resin 26. Bonded to the membrane 20. For this reason, the ITO film 16, the electrochromic film 18, the reflective conductive film 20, and the additional reflective film 22 are protected by the glass plate 24.

  As shown in FIG. 2, a first terminal 28 and a second terminal 30 are attached to one end in the longitudinal direction of the glass plate 24 (the right end in FIG. 2). The first terminal 28 and the second terminal 30 are provided on the opposite side of the glass substrate 14 with respect to the additional reflective film 22 (the back side of the additional reflective film 22). The first terminal 28 is formed by bending a metal plate material into a U-shape, and a pair of leg pieces 28A and 28B facing each other form an outer peripheral portion of the glass plate 24 as shown in FIG. It is attached to the glass plate 24 by clamping. Protrusions 28C projecting toward the glass substrate 14 are provided on the outer surface (surface opposite to the glass plate 24) of one leg piece 28A arranged in parallel between the glass substrate 14 and the glass plate 24. It has been. The tip of the projection 28C is in contact with the additional reflective film 22, and a gap is positively formed between the one leg piece 28A of the first terminal 28 and the reflective conductive film 20. For this reason, even if the reflective conductive film 20 is superposed in the film thickness direction with respect to the one leg piece 28A, a gap is secured between the one leg piece 28A and the reflective conductive film 20. ing. In addition, an electric cord 32 is fixed to the outer surface (the surface opposite to the glass plate 24) of the other leg piece 28B by solder 34. The electrical cord 32 is electrically connected to the ITO film 16 via the first terminal 28 and the additional reflection film 22 (the first terminal 28 is indirectly connected to the ITO film 16 via the additional reflection film 22. ).

  Similarly to the first terminal 28, the second terminal 30 is formed by bending a metal plate into a U-shape, and a pair of leg pieces facing each other as shown in FIG. 30A and 30B are attached to the glass plate 24 by sandwiching the outer periphery of the glass plate 24. One leg piece 30 </ b> A arranged in parallel between the glass substrate 14 and the glass plate 24 is provided with an extending portion 30 </ b> C extending along the plate surface of the glass plate 24. The extended portion 30 </ b> C has a connection surface 30 </ b> D where the distal end side of the outer surface (surface opposite to the glass plate 24) faces the reflective conductive film 20. The connection surface 30D is bonded to the reflective conductive film 20 with a conductive adhesive 40. In addition, an electric cord 36 is fixed to the outer surface (the surface opposite to the glass plate 24) of the other leg piece 30B by solder 38. The electrical cord 36 is electrically connected to the reflective conductive film 20 via the second terminal 30 and the adhesive 40.

On the other hand, as shown in FIGS. 1 and 2, the electric cords 32 and 36 are connected to a constant voltage power supply 44 via a polarity changeover switch 42. A voltage can be applied to the membrane 20. In this case, in the first embodiment, when a positive voltage is applied to the ITO film 16 side (IrOx side of the electrochromic film 18), the electrochromic film 18 is colored, and the reflective conductive film 20 side (electrochromic film). The electrochromic film 18 is decolored when a positive voltage is applied to the WO ₃ side (18). In FIG. 1, a region C to which dots are added indicates a colored region of the mirror main body 12.

  Next, the operation of the first embodiment will be described.

  In the electrochromic mirror 10 having the above configuration, when the polarity changeover switch 42 is operated, a voltage is applied between the ITO film 16 and the reflective conductive film 20, and the light transmittance of the electrochromic film 18 changes. For this reason, the light incident on the glass substrate 14 from the surface side and reflected by the light reflecting surface of the reflective conductive film 20 (see arrow L1 in FIGS. 3 and 4) depends on the light transmittance of the electrochromic film 18. The brightness is changed.

  Here, in this electrochromic mirror 10, since the additional reflection film 22 is formed outside the outer periphery of the reflection conductive film 20, the effective visual interface area of the mirror body 12 (that is, the area of the portion where the reflection image is reflected) can be enlarged. . In addition, since the first terminal 28 and the second terminal 30 are provided on the opposite side of the glass substrate 14 with respect to the additional reflection film 22, a frame for hiding the terminal like a conventional anti-glare mirror is provided on the glass substrate. There is no need to provide it on the surface side, and this also increases the effective visual interface area of the mirror body 12. Further, since the additional reflection film 22 is made of aluminum and has conductivity, the first terminal 28 can be connected to the ITO film 16 via the additional reflection film 22, and the connection of the first terminal 28 is easy. .

  Further, in the electrochromic mirror 10, the first terminal 28 and the second terminal 30 are formed in a U shape, and the pair of leg pieces 28 A and 28 B and the pair of leg pieces 30 A and 30 B sandwich the outer peripheral portion of the glass plate 24. By doing so, it is the structure attached to the glass plate 24. For this reason, the first terminal 28 and the second terminal 30 can be firmly attached to the glass plate 24. Moreover, the first terminal 28 and the second terminal 30 have the leg pieces 28A and the leg pieces 30A arranged in parallel between the glass substrate 14 and the glass plate 24, and the outer portions of the leg pieces 28A and the leg pieces 30B. Is connected to the ITO film 16 or the reflective conductive film 20. For this reason, the arrangement space of the leg surface 28A and the leg pieces 30A along the thickness direction of the glass substrate 14 and the glass plate 24 can be reduced.

  Furthermore, in this electrochromic mirror 10, the first terminal 28 has a projection 28C that creates a gap between the one leg piece 28A and the reflective conductive film 20, and thus the leg piece 28A of the first terminal 28. And the reflective conductive film 20 can be prevented from being short-circuited.

Further, in the electrochromic mirror 10, the connection surface 30 </ b> D provided on the extending portion 30 </ b> C of the second terminal 30 is bonded to the reflective conductive film 20 with the conductive adhesive 40, and the second terminal 30 and the reflective electrode are reflected. The conductive film 20 is in surface contact. For this reason, even when a load directed toward the glass substrate 14 acts on the second terminal 30, it is possible to suppress the extended portion 30 </ b> C from breaking through the reflective conductive film 20 and the electrochromic film 18 and short-circuiting to the ITO film 16.
<Second Embodiment>
5 and 6 show a second embodiment of the present invention. In this embodiment, the additional reflective film 22 is formed on the glass substrate 14 side of the ITO film 16 and outside the outer periphery of the reflective conductive film 20, and the inner peripheral part is in the film thickness direction with respect to the outer peripheral part of the reflective conductive film 20. Polymerized. Further, the first terminal 28 has a protrusion 28 </ b> C that is in contact with the ITO film 16 at the tip, and is directly connected to the ITO film 16. This embodiment also has basically the same operational effects as the first embodiment.

  In addition, in the said 1st Embodiment and 2nd Embodiment, it was set as the structure by which the 1st terminal 28 and the 2nd terminal 30 were attached to the glass plate 24, However, Not only this but the 1st terminal 28 and the 2nd terminal The support by the glass plate 24 may be omitted by fixing both to the ITO film 16 and the reflective conductive film 20 with a conductive adhesive or the like.

  Moreover, in the said 1st Embodiment and 2nd Embodiment, it was set as the structure which applied the glass plate 24 as a protective plate, However, Only if this is sufficient, the protective plate should just be formed with the material which has insulation. .

  Furthermore, in the said 1st Embodiment and 2nd Embodiment, it was set as the structure provided with the additional reflective film 22, However, Not only this but the area of the reflective conductive film 20 is expanded when the additional reflective film 22 is abbreviate | omitted. This can expand the effective field of view.

It is a top view which shows the structure of the surface side of the mirror main body which is a structural member of the electrochromic mirror which concerns on 1st Embodiment of this invention. It is a figure which shows the structure which concerns on embodiment of the mirror main body which is a structural member of the electrochromic mirror which concerns on 1st Embodiment of this invention. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. It is sectional drawing which shows 2nd Embodiment of this invention. It is sectional drawing which shows 2nd Embodiment of this invention.

Explanation of symbols

10 Electrochromic mirror 12 Mirror body 14 Glass substrate 16 ITO film (transparent conductive film)
18 Electrochromic film (dimming film)
20 Reflective conductive film 22 Additional reflective film 24 Glass plate (protective plate)
28 1st terminal 28A One leg piece 28C Protrusion 30 2nd terminal 30A One leg piece 30D Connection surface

Claims (7)

A transparent substrate constituting the mirror body,
A transparent conductive film formed on the back surface of the substrate;
A reflective conductive film formed on a side opposite to the substrate with respect to the transparent conductive film in a state in which an outer peripheral portion of the transparent conductive film is exposed to a back surface side of the substrate; ,
A dimming film formed between the transparent conductive film and the reflective conductive film, and having a light transmittance that changes when a voltage is applied between the transparent conductive film and the reflective conductive film;
An additional reflective film formed on the outer periphery of the reflective conductive film, the substrate side being a light reflective surface;
A first terminal provided on the opposite side of the substrate with respect to the additional reflective film and having conductivity, and connected directly or indirectly to an outer peripheral portion of the transparent conductive film;
A second terminal provided on the back side of the substrate and having conductivity, connected to the reflective conductive film;
Anti-glare mirror with   The antiglare mirror according to claim 1, wherein the additional reflective film is formed on the substrate side of the transparent conductive film.   2. The additional reflection film according to claim 1, wherein the additional reflection film is formed on the opposite side of the transparent conductive film from the substrate and has conductivity, and the first terminal is connected to the additional reflection film. The antiglare mirror described. A transparent substrate constituting the mirror body,
A transparent conductive film formed on the back surface of the substrate;
A reflective conductive film formed on a side opposite to the substrate with respect to the transparent conductive film in a state in which an outer peripheral portion of the transparent conductive film is exposed to a back surface side of the substrate; ,
A dimming film formed between the transparent conductive film and the reflective conductive film, and having a light transmittance that changes when a voltage is applied between the transparent conductive film and the reflective conductive film;
A protective plate provided on the opposite side of the substrate with respect to the reflective conductive film, supported by the substrate, and protecting the transparent conductive film, the dimming film, and the reflective conductive film;
A pair of leg pieces, which are provided on the back side of the substrate, are formed in a U-shape and have conductivity and face each other, are attached to the protection plate by sandwiching the outer periphery of the protection plate, A first terminal and a second terminal, wherein the leg pieces are disposed between the substrate and the protective plate;
The first terminal has an outer side of the one leg piece connected to an outer peripheral portion of the transparent conductive film, and the second terminal has an outer side of the one leg piece connected to the reflective conductive film. An anti-glare mirror characterized by   An additional reflective film formed on the outer periphery of the reflective conductive film and having a light reflecting surface on the substrate side, and the first terminal is provided on the opposite side of the substrate with respect to the additional reflective film; The anti-glare mirror according to claim 4, wherein   The first terminal has a protrusion formed outside the one leg piece, and the protrusion is connected to the transparent conductive film and has a gap between the one leg piece and the reflective conductive film. The anti-glare mirror according to claim 4, wherein the anti-glare mirror is generated.   The second terminal is characterized in that an outer side of the one leg piece is a connection surface facing the reflective conductive film, and the connection surface is bonded to the reflective conductive film with a conductive adhesive. The anti-glare mirror according to any one of claims 4 to 6.

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