JPH0640928U - Anti-glare mirror - Google Patents

Abstract

(57) [Abstract] [Purpose] In an anti-glare mirror using the light scattering effect of PLZT, the variable width of the reflectance of the mirror is increased and a polarizing member is not necessary. An antiglare mirror in which the reflectance of the mirror is controlled by utilizing a light scattering effect generated by applying a voltage to PLZT, wherein the PLZT is arranged in a plurality of layers. Dazzling mirror.

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, PLZT (a transparent ferroelectric substance composed of Pb, La, Zr, Ti, and O) is arranged on the front surface of the reflecting surface, and light scattering caused by applying a voltage to the PLZT is performed. It is already known that the reflectance of a mirror is controlled by utilizing the effect, or that a polarizing member for improving the antiglare effect is attached to the front surface of such PLZT.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, in the former anti-glare mirror having no polarizing member, the decrease in the light transmittance due to the light scattering effect of PLZT is not so large, and therefore the mirror reflectance can be made sufficiently low. There is a problem that you cannot do it. On the other hand, in the latter anti-glare mirror in which a polarizing member is provided on the front surface of PLZT, there is a problem that a high reflectance is not obtained although the anti-glare effect is improved. The present invention has been made to solve the above problems.

[0004]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems by using a plurality of layers of PLZT. That is, according to the present invention, in an antiglare mirror in which the reflectance of the mirror is controlled by utilizing the light scattering effect generated by applying a voltage to PLZT, the PLZTs are arranged in a plurality of layers. A feature of the present invention is to provide an anti-glare mirror.

[0005]

[Action]

 Since the PLZT of each layer reduces the light transmittance due to the light scattering effect, the light transmittance can be significantly reduced in the antiglare mirror according to the present invention in which a plurality of PLZTs are stacked. That is, in the antiglare mirror of the present invention having a plurality of layers of PLZT, the variable range of the reflectance is larger than that of a single layer of PLZT.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1 showing an example of the anti-glare mirror according to the present invention, the reference numeral 1 is a transparent protective member. It is desirable to provide a reflection reducing film (AR film) 2 on the front surface of the transparent protective member 1. The reflection-reducing film 2 reduces the reflection of the transparent protective member 1, thereby compensating for the reduction of the mirror reflectance accompanying the disposition of the transparent protective member 1. Therefore, in the present invention, a plurality of layers of PLZTs 3, 3, ... Are stacked on the back surface side of the transparent protective member 1. The PLZT3 is preferably in the form of a thin film, but may be in the form of a plate. PLZT3 has at least two layers, but in the case shown in FIG. 1, three layers are used. Reference numeral 4 is a transparent electrode of each PLZT 3, and 5 is an electrode / reflection film. In the case of FIG. 1, the transparent electrode 4, PLZT3, transparent electrode 4, PLZT3, transparent electrode 4, PLZT3, and electrode / reflection film 5 are laminated in this order on the back surface side of the transparent protective member 1. The reference numeral 6 indicates incident light such as headlight light of the following vehicle which is incident on the antiglare mirror.

The case shown in FIG. 2 is the same as the case shown in FIG. 1 except that the PLZT 3 has only two layers.

[0008]

[Effect of device]

 As described above, the anti-glare mirror according to the present invention has a plurality of layers of PLZT stacked on top of each other, so that the variable range of the reflectance is larger than that of the anti-glare mirror including only a single layer of PLZT. Therefore, a polarizing member for improving the antiglare effect is unnecessary. It is also possible to lower the drive voltage of PLZT per layer.

[Submission date] November 13, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior art]

Such anti-glare mirror, PLZT on the front of the reflecting surface disposed (Pb, La, Zr, Ti , transparency and ferroelectric consisting O), in particular from the resulting light to apply a voltage to the PLZT It is already known that the reflectance of the mirror is controlled by utilizing the scattering effect, or that a polarizing member for improving the antiglare effect is attached to the front surface of such PLZT.

[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 sectional view showing another example of an antiglare mirror according to the present invention.

[Explanation of symbols]

 1 Transparent protective member 2 Reflection reduction film 3 PLZT 4 Transparent electrode 5 Electrode / reflection film 6 Incident light

Claims (1)

[Scope of utility model registration request] 1. An antiglare mirror in which the reflectance of the mirror is controlled by utilizing a light scattering effect generated by applying a voltage to PLZT, wherein the PLZTs are arranged in a plurality of layers. Anti-glare mirror to do.