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Partial optical rotator, and partial optical rotatory film, intermediate film laminate, functional glass and head-up display each provided with same

A technology of optical activity and intermediate film, which is applied in the field of functional glass and head-up display, and can solve the problem of reduced image visibility for observers

Pending Publication Date: 2020-11-27
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a phenomenon is called ghost phenomenon, which significantly reduces the image visibility of observers

Method used

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  • Partial optical rotator, and partial optical rotatory film, intermediate film laminate, functional glass and head-up display each provided with same
  • Partial optical rotator, and partial optical rotatory film, intermediate film laminate, functional glass and head-up display each provided with same
  • Partial optical rotator, and partial optical rotatory film, intermediate film laminate, functional glass and head-up display each provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111]

[0112] The coating liquid (A) of the liquid crystal composition which has the composition shown in Table 1 was prepared.

[0113] 【Table 1】

[0114] Table 1: Composition Table of Coating Solution (A)

[0115] Material (type) Material name (maker) Recipe amount (parts) polymerizable liquid crystal monomer LC242 (BASF company) 24.69 photopolymerization initiator Irgacure TPO (BASF Corporation) 1.23 solvent Cyclopentanone 74.07

[0116] Using the prepared coating solution (A), a partially optically active film was produced in the following procedure. The supporting substrate was cut out into 10 cm squares by the method described in Example 1 of JP-A-2002-90743 A rubbing-treated TAC film (thickness 80 μm) so that the rubbing angle was 40 degrees with respect to the sides.

[0117] (1) Using a wire bar, the coating solution (A) was applied to the rubbing-treated surface of the TAC film at room temperature so that the coating fi...

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Abstract

A partial optical rotator (7) according to the present invention is provided with at least one liquid crystal layer including a first region (8) which exhibits optical rotatory power and a second region (9) which does not exhibit optical rotatory power with respect to the normal direction, wherein the first region (8) and the second region (9) are present in the same liquid crystal layer.

Description

technical field [0001] The present invention relates to, for example, a partial optical rotator suitable for use in a head-up display (Head-Up Display (HUD)), a partial optical rotator film using the partial optical rotator, an interlayer film laminate, functional glass, and a head-up display. Background technique [0002] A method of displaying information to drivers of automobiles, aircraft, etc. is to use a navigation system, a head-up display (hereinafter also referred to as "HUD"), or the like. The HUD is a system that projects an image projected from an image display device such as a liquid crystal display (hereinafter referred to as "LCD") onto, for example, a windshield of an automobile. [0003] The display light emitted from the image display device is reflected by the reflector, and then reflected by the front glass to reach the observer. Although the observer sees the display image projected on the front glass, the display image is formed as a virtual image and ...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B7/023G02B27/01G02F1/13
CPCG02B5/30B32B7/023G02B27/01G02F1/13
Inventor 田中兴一
Owner NIPPON KAYAKU CO LTD