JP2000019449A - Combiner for hud - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the warpage of a combiner base material and to lessen the distortion of display images accompanying the distortion of a combiner part while preventing splashing at the time of breakage by adopting such constitution that a glass plate is embedded into a plane plate of a transparent resin for a base material portion. SOLUTION: The glass plate 11 is embedded into the plate 10 of the resin and a hologram layer 12 having recorded a reflection type hologram therein is placed thereon. Since the circumference of the glass plate 11 in the combiner base material is enclosed by the resin, the scattering of splinters outside does not occur even if it breaks. In addition, since the warpage of the plate 10 of the resin is suppressed by the glass plate 11, the combiner does not distort concerning the range having the glass plate 11 therein. The base material part is formed by forming the resin plate 10 which is the plane substrate bored with a hole by injection molding, etc., then putting the glass plate 11 of approximately the same size as the size of the hole into the hole and solidifying the circumference with a photosetting resin or the like having approximately the same refractive index as the refractive index of the glass plate 11 and the resin plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a HUD device used for an automobile, and more particularly to a technique for reducing image distortion caused by distortion of a combiner portion of the HUD device.

[0002]

2. Description of the Related Art A HUD device displays information such as instruments in front of a driver. For example, as shown in FIG.
It is configured. In FIG. 1, light generated from the display device 1 is:
Since the light enters the combiner 2 and the diffracted light reaches the driver 4, the information shown on the display device 1 can be seen by the driver 3 at the position of the virtual image 5 at a long distance in front of the driver. ing. In the case of a HUD device using a hologram, the combiner portion is composed of a reflective hologram portion 6 and a base portion 7 supporting the same as shown in FIG. A flat plate made of a heat-resistant resin such as acrylic or polycarbonate was used for 7. This is because the glass plate cannot be used because there is a risk of fragments being scattered at the time of breakage, but in addition, there is an advantage that processing such as a joint portion between the combiner and the body can be easily performed. But it was. However, in the case of a resin plate, since a warp occurs under stress or an environment such as a high temperature and a high humidity, there is a disadvantage that distortion is easily generated in a combiner portion.

[0003]

As described above, the conventional HUD combiner has a disadvantage that the combiner portion is easily distorted due to the warpage of the combiner base material. In the case of a combiner using a hologram, if the position or angle of the combiner changes, the image formation position of the display image greatly changes. Thus, when the combiner portion is distorted, the display image of the HUD and the formation of the image are displayed. There is a problem that the image position is greatly distorted. The present invention
In order to solve such problems, it is necessary to reduce the warpage of the combiner base material and to reduce the distortion of the display image accompanying the distortion of the combiner portion while preventing the fragments from being scattered at the time of breakage. The purpose is.

[0004]

In order to solve the above-mentioned problems, the present invention provides a holographic combiner used for an automobile HUD device, which comprises:
The configuration is such that a glass plate is embedded in a plane plate of a transparent resin.

[0005]

The operation of the present invention will be described in detail with reference to the drawings. FIG. 3 is a schematic view showing a base material portion of the combiner for HUD of the present invention. In the figure, a glass plate 9 is embedded near the center of a resin plate 8 as a combiner base material made of resin. In the case of such a structure, the glass plate 9 in the combiner base material is surrounded by the resin, so that even if the glass plate 9 is damaged, the fragments do not scatter outside. On the other hand, regarding the distortion, the glass plate 9 is used for the resin plate 8.
The warp is suppressed, so that the combiner is not distorted in a certain area of the glass plate. As for the portion deviated from the glass plate, a slight warp occurs in the base portion of the combiner, but as shown in FIG. 4, the warp near the center is suppressed, so that the position of the combiner portion and
The difference in angle becomes smaller. For this reason, the image distortion is greatly reduced.

[0006]

Embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 5, a glass plate 11 is embedded in a resin plate 10, and a hologram layer 12 on which a reflection hologram is recorded is placed thereon. Such a combiner is made, for example, by the following steps. As for the base material portion, first, as shown in FIG. 6, a resin plate 14 as a plane substrate having a hole 13 is formed by a resin such as PMMA having heat resistance by injection molding or the like. 7, a glass plate 16 having substantially the same size as the hole is inserted, and the glass plate 16 and the resin plate 14 are wrapped around the glass plate 16 and light-cured resin 17 having substantially the same refractive index as the glass plate 16 or the resin plate 14. For the hologram portion, the hologram photosensitive material applied to the film is attached to a glass plate, and a reflection type hologram is recorded using, for example, an optical system as shown in FIG. It is created by processing into the shape of a peeling combiner and attaching it to the combiner base material. With the combiner prepared in this way, a clear reproduced image can be obtained without distortion of the base material even when the combiner is left in an environment such as high temperature and high humidity.

[0007]

As described above, according to the method of the present invention,
The use of a holographic combiner used in automotive HUD devices with a structure in which a glass plate is embedded in a transparent resin flat plate as the base material allows the fragments to be scattered when broken. In addition, the warpage of the combiner base material can be reduced while preventing the distortion of the display image due to the distortion of the combiner portion.

[0008]

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an example of a HUD device.

FIG. 2 is a schematic diagram showing a configuration of a holographic combiner.

FIG. 3 is a schematic view showing an example of a configuration of a base portion of a combiner of the present invention.

FIG. 4 is a schematic diagram illustrating that warpage is reduced in the configuration of the present invention.

FIG. 5 is a schematic view showing an example of the HUD combiner of the present invention.

FIG. 6 is a schematic view showing an example of a method for producing a base portion of a combiner of the present invention.

FIG. 7 is a schematic view showing an example of a method for producing a base portion of a combiner of the present invention.

FIG. 8 is a schematic diagram showing an example of a method for creating a hologram portion of the combiner of the present invention.

[Explanation of symbols]

 8 resin plate 9 glass plate 10 resin plate 11 glass plate 12 hologram layer 13 hole 14 resin plate 15 resin plate 16 glass plate 17 light Cured resin

Claims (2)

[Claims] 1. A combiner used in an automobile HUD device, comprising a reflection hologram part and a base part, wherein the base part is a transparent resin flat plate and a glass plate embedded in the plate. A combiner for a HUD characterized by having a configuration as described above. 2. An HUD device comprising the HUD combiner according to claim 1.