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Head-up display system

A head-up display and display technology, applied in the direction of instruments, optics, polarizing elements, etc., to achieve the effect of excellent polarization axis transformation performance

Active Publication Date: 2019-10-25
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the transformation performance of the azimuth rotator sub-polarization axis, Patent Document 1 does not mention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148]

[0149] Coating liquid A having the composition shown in Table 1 was prepared.

[0150] Table 1 Composition Table of Coating Solution A

[0151] Material (type) Material name (maker) Recipe amount (parts) polymerizable liquid crystal LC242 (BASF company) 25 photopolymerization initiator Irgacure 907 (BASF Corporation) 1 solvent Toluene 74

[0152]

[0153] Using the prepared coating solution A, 1 / 2 wavelength plates were each manufactured according to the following procedure. As the support substrate, a TAC film (thickness: 80 μm) obtained by rubbing by the method described in Example 1 of JP-A-2002-90743 was used.

[0154] (1) The coating solution A was coated on the rubbing-treated surface of the TAC film at room temperature using a wire bar so that the thickness of each obtained 1 / 2 wavelength plate after drying became 2 μm.

[0155] (2) The obtained coating film was heated at 50° C. for 2 minutes to remove the solvent...

Embodiment 2

[0178] In addition to setting a polarizing plate capable of emitting S-polarized light as the polarizing plate 30 and the angle θ formed by the slow axis of the 1 / 2 wavelength plate and the polarization axis of the S-polarized light incident on the optical laminate 4 is 40°, and the S-polarized light pair A head-up display was produced in the same manner as in Example 1, except that the optical laminate 4 was installed so that the incident angle of the optical laminate 4 became Brewster's angle (about 56°). When a display image was projected from a liquid crystal projector to the optical laminate 4 in a dark room, a double image could not be observed in the display image.

Embodiment 3

[0180] A head-up display was manufactured in the same manner as in Example 2, except that the optical laminate was installed so that the angle θ formed by the slow axis of the 1 / 2 wavelength plate and the polarization axis of P-polarized light incident on the optical laminate was 35°. When a display image is projected from a liquid crystal projector to an optical laminate in a dark room, a double image cannot be observed on the display image.

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PUM

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Abstract

A head-up display system according to the present invention includes: an optical laminated body (4) including at least one substrate and a half-wave plate; and a display (2) that radiates display light representing an image to be displayed in the form of S polarized light or P polarized light, and the angle made by the polarization axis of the S polarized light or the P polarized light and the slow axis of the half-wave plate, the S polarized light or the P polarized light being incident from an oblique position at an angle of 45-65 degrees with respect to an axis perpendicular to the surfaceof the optical laminated body (4), is 35-44 degrees.

Description

technical field [0001] The present invention relates to a head-up display system that makes a display image projected from a display a virtual image and reflects it on a display such as glass. Background technique [0002] As methods 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 system is a system that projects a display image projected from an image projection device such as a liquid crystal display (hereinafter referred to as LCD) on, for example, a front glass of a car. [0003] The display light emitted by the image display device is reflected by the reflector, and then reflected by the front glass (front glass) before reaching the observer. The viewer sees the display image projected behind the front glass, but the display image is a virtual image and can be viewed at a position of the image located farther than the front glass. In this m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01B60K35/00G02B5/30
CPCB60K35/00G02B27/0101G02B27/283G02B2027/0118B60K35/23B60K2360/25G02B5/30G02B5/3016
Inventor 田中兴一早崎智之
Owner NIPPON KAYAKU CO LTD