JP2562456Y2 - Anti-glare mirror - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-glare mirror mounted inside or outside a vehicle such as an automobile. The present invention relates to an anti-glare mirror in which the reflectivity of a rear-view mirror is reduced when incident on the mirror, thereby preventing the troublesome and unpleasant sensation of reflected glare.

[0002]

2. Description of the Related Art As such an anti-glare mirror, an electro-optical element for controlling a reflectance using an electrochromic element or a PLZT (Pb, La, Zr, Ti, A material using a transparent ferroelectric substance made of O) and utilizing its light scattering effect is known.

[0003]

The anti-glare mirror using electrochromic uses a chemical reaction of electrochromic, and therefore has a problem that the reflectivity of the mirror cannot be instantaneously greatly changed. On the other hand, P
In an anti-glare mirror using the light scattering effect of LZT,
It is necessary to apply a high voltage to increase the reflectivity variable width (dynamic range) only with PLZT and obtain a sufficient anti-glare effect. Therefore, such an anti-glare mirror is preferable on a vehicle and in durability. Absent. The present invention has been made to solve the above problems.

[0004]

The present invention solves the above-mentioned problem by using both PLZT and electrochromic as an electro-optical element for controlling the reflectance. That is, in the present invention, the PL is provided on the back side of the transparent plate member.
An anti-glare mirror provided with a ZT layer and an electrochromic layer is provided (claim 1).

In disposing a PLZT layer and an electrochromic layer on the back side of a transparent plate-like member,
Electrodes are provided on both front and rear sides or one side of the layer and on both front and rear sides of the electrochromic layer, and a transparent insulator is provided between the adjacent PLZT layer electrode and the electrochromic layer electrode (claim 2).

[0006]

In the case where only PLZT is used as the electro-optical element,
When the applied voltage is low, as shown in FIG. 2, the reflectance variable width is small, but the reflectance changes instantaneously. On the other hand, when only electrochromic is used as the electro-optical element, it takes some time to change the reflectance as shown in FIG. Therefore, the PLZT
2. The method according to claim 1, wherein both the layer and the electrochromic layer are provided.
In the case of the anti-glare mirror, as shown in FIG. 4, even when the applied voltage is low, not only the reflectance variable width becomes large,
The reflectivity of the mirror changes quickly.

In the anti-glare mirror according to the second aspect, one electrode of the PLZT layer and one electrode of the electrochromic layer are adjacent to each other, but these adjacent electrodes are disposed between them. It is electrically insulated by the provided transparent insulator.

[0008]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a transparent plate-shaped member. A PLZT layer 2 and an electrochromic layer 3 are provided on the back side of the transparent plate-like member 1. The PLZT layer 2 has transparent electrodes 4 and 5 on the front and rear surfaces thereof, and the electrochromic layer 3 has a transparent electrode 7 on the front and an electrode / reflection film 8 on the rear.
Are provided. Although one transparent electrode 5 of the PLZT layer 2 and the transparent electrode 7 of the electrochromic layer 3 are adjacent to each other, a transparent insulator 9 is provided between the transparent electrodes 5 and 7.
(For example, SiO ₂ or the like) is provided. In the example shown in FIG. 1, a protective transparent plate member 11 is fixed to the back surface of the electrode / reflection film 8 of the electrochromic layer 3 via an adhesive layer 10. Reference numeral 12 denotes a power supply connected to the transparent electrodes 4 and 5 of the PLZT layer 2, and reference numeral 13 denotes a power supply connected to the transparent electrode 7 and the electrode / reflection plate 8 of the electrochromic layer 3. Reference numeral 14 denotes light incident on the mirror.

[0009]

As described above, in the present invention, since the PLZT layer and the electrochromic layer are used in combination, favorable responsiveness when changing the reflectivity of the mirror is ensured, and when the applied voltage is low. However, a large reflectance variable width can be obtained. Therefore, it is possible to lower the driving voltage of the PLZT layer. Also, PLZT
As described above, one electrode of the layer and one electrode of the electrochromic layer are adjacent to each other, and these adjacent electrodes are electrically insulated by the transparent insulator provided therebetween.

[Brief description of the drawings]

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

FIG. 2 is a graph showing a change in reflectance when only PLZT is used as an electro-optical element.

FIG. 3 is a graph showing a change in reflectance when only electrochromic is used as an electro-optical element.

FIG. 4 is a graph showing a change in reflectance when PLZT and electrochromic are used together as an electro-optical element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent plate member 2 PLZT layer 3 Electrochromic layer 4 Transparent electrode 5 Transparent electrode 7 Transparent electrode 8 Electrode and reflection film 9 Transparent insulator 10 Adhesive layer 11 Protective transparent plate member 12 Power supply 13 Power supply 14 Incident light

Claims (2)

(57) [Scope of request for utility model registration] 1. An anti-glare mirror comprising a transparent plate-like member having a PLZT layer and an electrochromic layer disposed on the back side thereof. 2. An electrode is provided on both front and rear sides or one side of the PLZT layer and on both front and rear sides of the electrochromic layer, and a transparent insulator is provided between an electrode of the adjacent PLZT layer and an electrode of the electrochromic layer. The anti-glare mirror according to claim 1, wherein: