Head-up display apparatus

A head-up display and display technology, used in instruments, transportation and packaging, optics, etc., can solve the problems of insufficient heat resistance, reduced visual confirmation, dizziness, etc., and achieve excellent heat resistance and visual confirmation. Effect

Active Publication Date: 2020-06-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a head-up display device has a problem that its visibility is significantly reduced (causes dizziness in the worst case) when the driver wears polarized sunglasses.
In addition, conventional head-up display devices have a problem of insufficient heat resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 1. Synthesis of organic pigments (aromatic diazo compounds)

[0126] 4-Nitroaniline was mixed with 8-amino-2 by a conventional method (the method described in Toyo Hosoda's "Theoretical Manufacture of Dye Chemistry, Fifth Edition" July 15, Showa 43, published by Technical Institute, pages 135 to 152). -Naphthalenesulfonic acid undergoes diazotization and coupling reactions to obtain monoazo compounds. The obtained monoazo compound was diazotized by the above-mentioned conventional method, and then coupled with 1-amino-8-naphthol-2,4-disulfonic acid lithium salt to obtain a crude product. This crude product was salted out with lithium chloride, and the aromatic diazide compound of following formula (4) was obtained.

[0127]

[0128] 2. Fabrication of polarizers

[0129] A norbornene-based resin film (manufactured by Zeon Corporation: product name "ZEONOR", ZF14-100) was prepared as a base material, and the surface of the film was subjected to rubbing treatment and ...

Embodiment 2

[0138] Except having changed the retardation film which comprises a retardation layer into the following materials, it carried out similarly to Example 1, and produced the laminated body of a cover member / polarizing plate with a retardation layer. Commercially available polycarbonate resin (manufactured by Mitsubishi Chemical Corporation: trade name "DURABIO D7340") was vacuum-dried at 100° C. for 5 hours, and then extruded with a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder temperature was 230° C.) , T-shaped die (1700 mm in width, 230° C. in temperature), casting roll (120° C. in temperature) and film-making device of coiler to produce a film with a thickness of 220 μm. The obtained film was stretched 2.5 times at 125° C. to obtain a retardation film having a thickness of 140 μm and Re(550)=3292 nm. The obtained laminated body was subjected to the same evaluation as Example 1. The results are shown in Table 1.

Embodiment 3

[0140] Except having changed the retardation film which comprises a retardation layer into the following materials, it carried out similarly to Example 1, and produced the laminated body of a cover member / polarizing plate with a retardation layer. Commercially available polycarbonate resin (manufactured by Mitsubishi Chemical Corporation: trade name "DURABIO D7340") was vacuum-dried at 100° C. for 5 hours, and then extruded with a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder temperature was 230° C.) , T-shaped die (1700 mm in width, 230° C. in temperature), casting roll (120° C. in temperature) and film-making device of coiler to produce a film with a thickness of 220 μm. The obtained film was stretched free-end 2.5 times at 122° C. to obtain a retardation film having a thickness of 140 μm and Re(550)=4004 nm. The obtained laminated body was subjected to the same evaluation as Example 1. The results are shown in Table 1.

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PUM

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Abstract

Provided is a head-up display apparatus (100) having excellent visibility during viewing via polarization sunglasses, and having excellent heat resistance. The head-up display apparatus (100) according to the present invention comprises: a display device (10) which emits projection light; at least one reflection device (20) which reflects the projection light; a casing (30) which has an opening portion (32) and in which the display device (10) and the reflection device (20) are accommodated; a cover member (40) which covers the opening portion (32); and a retardation-layer-provided polarization plate (50) which is provided on the casing interior side of the cover member (40) and which has a retardation layer (52) and a polarizer (54) in order from the cover member (40) side. The in-plane phase difference Re (550) of the retardation layer (52) is at least 3000 nm. The head-up display apparatus (100) according to the present invention is configured in such a way that the angle of reflection of the projection light emitted from the casing through the opening portion (32) is at most 30 DEG, or is at least 40 DEG with respect to a windshield.

Description

technical field [0001] The present invention relates to a head-up display device. Background technique [0002] The driver of the vehicle drives while watching the front through the windshield and looking at the instruments on the instrument panel. That is, the line of sight moves to the instrument class ahead and below. If it is possible to observe instruments while looking ahead, there is no need to move the line of sight, and improvement in drivability (eventually, safety) can be expected. Based on this finding, a head-up display device was developed and put into practical use. In the head-up display device, a cover member covering the opening of the optical path is provided in order to prevent foreign matter such as garbage from entering into the casing housing the optical system. Furthermore, in order to prevent an increase in temperature in the housing (specifically, to prevent the incidence of sunlight), a polarizing plate may be bonded to the cover member (for exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01B60K35/00
CPCB60K35/00B60K2370/1529G02B5/3083G02B5/3033G02B27/0101G02B2027/0118G02B5/305C09B33/16
Inventor 渊田岳仁麻野井祥明高田胜则
Owner NITTO DENKO CORP
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