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 Laminate including optically functioning film

Details
Inventors: Asakura, Motoh; Kobayashi, Kazuya; Nishikawa, Shinji;
Assignee: Central Glass Company, Limited (Yamaguchi, JP)
Primary Examiner: Jones; Deborah
Assistant Examiner: Stein; Stephen
Attorney, Agent or Firm: Evenson, McKeown, Edwards & Lenahan, P.L.L.C.

A laminated glass to be used as a front windshield of an automotive vehicle including a head-up display system. The laminated glass comprises outboard-side and inboard-side glass plates. An intermediate film is interposed between the inboard-side and outboard-side glass plates to bond the glass plates to each other. An optically functioning film such as a polarization-direction changing film is bonded to the outboard-side glass plate. At least one of the inboard-side glass plate, the outboard-side glass plate and the intermediate film is colored in a manner that a color difference between first and second parts of the laminate is not higher than 2.4, in which the first part includes the optically functioning film while the second part is other than the first part.

DETAILED DESCRIPTION It is an object of the present invention is to provide an improved laminate including an optically functioning film, which can effectively overcome drawbacks encountered in conventional laminates which are used, for example, for a head-up display system of an automotive vehicle.
Another object of the present invention is to provide an improved laminate including an optically functioning film, in which the yellowish color of the optically functioning film is rendered inconspicuous so as to improve not only external appearance but also safety of the laminate.
A further object of the present invention is to provide an improved laminate including an optically functioning film, in which a color difference between a first part (containing the optically functioning film) and a second part other than the first part of the laminate is relatively low to such an extent that the existence of the optically functioning film cannot be recognized under observation by the naked eyes.
An aspect of the present invention resides in a laminate comprising at least a first glass plate.
An optically functioning film is bonded to the first glass plate.
The at least a first glass plate is colored in a manner that a color difference between first and second parts of the laminate is not higher than 2.
4, the first part including the optically functioning film, the second part being other than the first part.
Another aspect of the present invention resides in a laminate comprising first and second glass plates which are respectively located outside and inside relative to a compartment.
An intermediate film is disposed between the first and second glass plates to bond the first and second glass plates to each other.
An optically functioning film is bonded to the first glass plate.
At least one of the first glass plate, the second glass plate and the intermediate film is colored in a manner that a color difference between first and second parts of the laminate is not higher than 2.
4, the first part including the optically functioning film, the second part being other than the first part



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