JPH0643620U - Anti-glare mirror - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Leakage of current in an antiglare mirror in which a PLZT having a transparent electrode film on the front surface and an electrode / reflective film on the rear surface is arranged on the rear surface side of the transparent substrate. It also prevents short circuits and corrosion of the electrode / reflective film. [Structure] The PLZT 13 and its transparent electrode film 11 and electrode / reflection film 12 are sealed from the rear surface side by a protective substrate 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an antiglare mirror mounted inside or outside a vehicle of a vehicle such as an automobile. More specifically, the present invention relates to an antiglare mirror mounted on a rearview mirror when a headlight of a following vehicle is incident on the vehicle while driving at night. The present invention relates to an antiglare mirror in which the annoyance and discomfort of reflected glare is prevented by reducing the reflectance of the rearview mirror.

[0002]

[Prior art]

 As such an anti-glare mirror, it is already known that a transparent electrode film is provided on the front surface of PLZT (a transparent ferroelectric substance consisting of Pb, La, Zr, Ti, and O) and an electrode / reflection film is provided on the rear surface. Has been. The applicant of the present invention filed a patent application for an anti-glare mirror in which a PLZT having a transparent electrode film on the front surface and an electrode / reflective film on the rear surface is disposed on the rear surface side of the transparent substrate, October 7, 1992. It's done on the day. In the present specification including the scope of claims for utility model registration, the term "front surface" refers to the surface on the side where incident light (such as headlight light of the following vehicle) 1 is incident on the mirror in Fig. 1, that is, the left surface. Good, the "rear surface" is the opposite surface.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional anti-glare mirror, since measures for preventing current leakage and short circuit are not always taken sufficiently, current leakage and short circuit may occur. Since the drive voltage of PLZT is as high as about 200 V, accidents due to current leakage or short circuit must be prevented. Further, in the conventional anti-glare mirror, measures for preventing the corrosion of the electrode / reflection film (for example, Al) are not always sufficient, and therefore the electrode / reflection film may be corroded. The present invention has been made in order to solve the above problems.

[0004]

Means for Solving the Problems In order to solve the above problems, the present invention comprises a PLZT having a transparent electrode film on the front surface and an electrode / reflective film on the rear surface, which is disposed on the rear surface side of a transparent substrate. The present invention provides an antiglare mirror, characterized in that the PLZT and its transparent electrode film and its electrode / reflection film are sealed from the rear side by a protective substrate (claim 1).

It is desirable that the electrode / reflection film on the rear surface of PLZT be smaller than the transparent electrode film on the front surface of PLZT (claim 2).

It is desirable that the positions of the transparent electrode film and the electrode / reflecting film are mutually displaced in either direction (claim 3).

[0007]

[Action]

 [Anti-Glare Mirror of Claim 1] In the anti-glare mirror of Claim 1, the PLZT and its transparent electrode film and electrode / reflection film are sealed from the rear surface side by the protective substrate, so that leakage or short circuit of current is prevented. There is no risk of this occurring, and there is no risk of corrosion of the electrode and reflective film.

[Anti-Glare Mirror of Claim 2] In the anti-glare mirror of Claim 2, the electrode / reflective film on the rear surface of PLZT is made smaller than the transparent electrode film on the front surface of PLZT. It is more preferably sealed from the rear side.

[Anti-Glare Mirror of Claim 3] The transparent electrode film and the electrode / reflection film are opposed to each other with the PLZT interposed therebetween. In the anti-glare mirror of Claim 3, the transparent electrode film and the electrode / reflection film are opposed to each other. By displacing the positions in either direction, the transparent electrode film and the electrode / reflection film can be conveniently connected to one of a pair of clip electrodes attached to the edge of a common transparent substrate. it can.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. Reference numeral 10 indicates a transparent substrate such as glass. On the rear surface side of the transparent substrate 10, a PLZT 13 having a transparent electrode film 11 on the front surface and an electrode / reflection film 12 on the rear surface is disposed. The transparent electrode film 11 on the front surface of the PLZT 13 is divided into two parts, that is, a transparent electrode film main body 11a and a transparent electrode film edge part 11b that are electrically isolated from each other by providing a slit 14 crossing the slit 14 near the edge part. To do. A pair of clip electrodes 16 and 17 are attached to opposite edges of the transparent substrate 10, one clip electrode 16 holds the transparent electrode film main body 11a, and the other clip electrode 17 holds the transparent electrode film edge 11b. . The transparent electrode film edge portion 11b sandwiched by the other clip electrode 17 is brought into contact with one edge 12a of the electrode / reflection film 12 on the rear surface of the PLZT 13. That is, the transparent electrode film edge portion 11b is nothing but a conductor for connecting the other clip electrode 17 and the electrode / reflection film 12. Further, the PLZT 13 and its transparent electrode film 11 and the electrode / reflective film 12 are sealed from the rear side by an adhesive layer or an adhesive layer 20, and a protective substrate such as glass is provided on the rear surface of the adhesive layer or the adhesive layer 20. 21 is fixed. Reference numeral 22 is a power source.

The electrode / reflection film 12 on the rear surface of the PLZT 13 is preferably smaller than the transparent electrode film 11 on the front surface of the PLZT 13, as shown in FIGS.

It is desirable to shift the positions of the transparent electrode film body 11a and the electrode / reflection film 12 from each other in either direction (for example, a vertical direction, a horizontal direction or an oblique direction). In the example shown in FIGS. 1 and 3, the electrode / reflecting film 12 is slid downward with respect to the transparent electrode film body 11a, so that the electrode / reflecting film 12 is sandwiched between the clip electrodes 17 by the transparent electrode film edge 11b. Is in contact with.

[0013]

[Effect of device]

 As described above, in the antiglare mirror according to the present invention, the PLZT and its transparent electrode film and the electrode / reflection film are sealed from the rear side by the protective substrate, so that current leakage or short circuit or the electrode / reflection film is caused. There is no risk of corrosion, and damage due to external force is prevented. Furthermore, by adhering the protective substrate to the rear surface, stress peeling due to the difference in thermal expansion between PLZT and the electrode / reflection film is prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of an anti-glare mirror according to the present invention.

FIG. 2 is a cross-sectional view showing an enlarged part of the same mirror.

FIG. 3 is a rear view of the same mirror.

[Explanation of symbols]

 1 Incident Light 10 Transparent Substrate 11 Transparent Electrode Film 12 Electrode / Reflective Film 12a Edge 13 PLZT 14 Slit 16 Clip Electrode 17 Clip Electrode 20 Adhesive Layer or Adhesive Layer 21 Protective Substrate 22 Power Supply

Claims (3)

[Scope of utility model registration request] 1. An anti-glare mirror comprising a transparent electrode film on the front surface and a PLZT provided on the rear surface with an electrode / reflective film on the rear surface side of the transparent substrate, the PLZT and the transparent electrode film and the electrode / reflective film. An anti-glare mirror, characterized in that the film is sealed from the rear side by a protective substrate. 2. The electrode / reflection film on the rear surface of the PLZT is made of PL.
The antiglare mirror according to claim 1, which is smaller than the transparent electrode film on the front surface of the ZT. 3. The antiglare mirror according to claim 1, wherein the transparent electrode film and the electrode / reflecting film are displaced from each other in either direction.