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Optical Reflection Film, Manufacturing Method Thereof, Optical Control Film Using Optical Reflection Film, Optical Film, Functional Glass And Head-up Display

A technology of light reflective film and light control film, which is applied in optics, optical components, instruments, etc., can solve the problems of legal restrictions, difficult application and high reflectivity, etc., and achieve the effect of improving visibility and easy processing of laminated glass

Inactive Publication Date: 2017-10-20
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, transmittance and reflectance are usually in a contradictory relationship, and there is a problem that when one increases, the other decreases
[0005] Especially in the case of windshields for automobiles, there are legal restrictions requiring the visible light transmittance in the direction perpendicular to the glass to be 70% or more, so it is difficult to apply members with high reflectivity

Method used

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  • Optical Reflection Film, Manufacturing Method Thereof, Optical Control Film Using Optical Reflection Film, Optical Film, Functional Glass And Head-up Display
  • Optical Reflection Film, Manufacturing Method Thereof, Optical Control Film Using Optical Reflection Film, Optical Film, Functional Glass And Head-up Display
  • Optical Reflection Film, Manufacturing Method Thereof, Optical Control Film Using Optical Reflection Film, Optical Film, Functional Glass And Head-up Display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119]

[0120] Using the prepared coating solutions (R1), (R2), (R3), the light reflective layer PRL-1, the light reflective layer PRL-2, and the light reflective layer PRL-3 were prepared according to the following steps, and then they were laminated And the light reflection film of this invention was produced. As the plastic substrate, a PET film manufactured by Toyobo Co., Ltd. (trade name A4100, thickness), which was previously rubbed on the surface of the primerless coating layer by the method described in Example 1 of JP 2002-90743 A, was used. 50μm) long rolls. The spectroscopic characteristics shown below were evaluated by measuring the reflection spectrum with a spectrophotometer MPC-3100 manufactured by Shimadzu Corporation.

[0121] (1) Using a gravure contact reverse coater (manufactured by Yasui Seiki Co., Ltd.), each coating solution was applied to the rubbing treatment surface of each PET film at room temperature, so that each light obtained after drying was refl...

Embodiment 2

[0141] The light reflection layer PRL-4 (using the coating liquid (R4)) was obtained on the PET film by the same production method as in Example 1 except for using the coating liquid (R4). The PET film on the light reflective layer PRL-3 side of the light reflective film obtained from (1) to (5) of Example 1 was peeled off, and then the light reflective layer PRL-4 on the PET film was removed using an acrylic adhesive. The light reflection layer side and the light reflection layer side of the light reflection layer PRL-3 from which the PET film has been peeled are laminated on each other, thereby obtaining a planar shape with PET films on both outer sides and further laminated with the light reflection layer PRL-4 The laminated film. Next, about 10 m of the laminated film was wound on a 76.2 mm (3 inch) plastic core, and placed in a 35° C. thermostat in a roll state for 48 hours. After unwinding the laminated film from the roll and cutting it into 15 cm squares, the PET films ...

Embodiment 3

[0145] The PET film of the light reflection layer PRL-4 of the flat-shaped laminate film further laminated with the light reflection layer PRL-4 obtained in Example 2 was peeled off, and the light reflection layer PRL-4 was peeled off the light of the PET film On the reflective layer side, a wide-band quarter wave plate (manufactured by Teijin Co., Ltd.: PUREACE WR-S), which is a light control layer, was bonded with an adhesive to produce a flat light control film. Next, about 10 m of the film was wound on a 76.2 mm (3 inch) plastic core, and it was placed in a thermostat at 80° C. for 3 hours in a roll state. After unwinding the laminated film from the roll and cutting into 15 cm squares, the PET films located on both outer sides of the laminated light reflection layer PRL-1 were peeled off. In this way, the curved light control film of the present invention in which the light reflection layer PRL-1 to the light reflection layer PRL-4 and the quarter wave plate as the light co...

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Abstract

The present invention provides an optical reflection film which maintains the high visible light transmittance, enables the reflectivity of the specific polarized light to be improved effectively and is excellent in processing performance, a manufacturing method thereof, optical control film using the optical reflection film, an optical film, a functional glass and a head-up display. The curved optical reflection film is characterized in that at least two optical reflection layers are laminated and comprise more than one of the optical reflection layer PRL-1, the optical reflection layer PRL-2 and the optical reflection layer PRL-3, the more than two laminated optical reflection layers having different center reflection wavelengths both have the characteristics of the polarized light in the same direction, and both maintain the curved shapes under the no-load states, and both have the thicknesses more than 50 micrometers and less than 500 micrometers.

Description

Technical field [0001] The present invention relates to a light reflection film suitable for use in, for example, a head-up display, a method of manufacturing the same, and a light control film, an optical film, and a functional glass and a head-up display using the light reflection film. Background technique [0002] As a method of displaying information to drivers of automobiles, airplanes, etc., navigation systems, head-up displays (hereinafter also referred to as HUDs), and the like are used. The HUD is a system that projects an image projected from an image projection unit such as a liquid crystal display (hereinafter referred to as LCD) onto, for example, the windshield of a car. [0003] figure 1 It is a schematic diagram of HUD. As shown by the optical path 5, the light emitted from the image display unit 2 is reflected at the mirror 3, and then reflected by the windshield 4 before reaching the observer 1. The observer 1 sees the image projected on the windshield 4, but i...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02B27/01
CPCG02B5/30G02B5/3016G02B27/01G02B27/0101
Inventor 田中兴一
Owner NIPPON KAYAKU CO LTD
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