JPH10227991A - Head-up display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the head-up display which can prevent the connection place between a main body and a combiner from breaking, facilitates the arrangement of components in the main body, and enables the combiner to easily be separated from the main body for maintenance such as cleaning. SOLUTION: A virtual image is formed by changing the optical path of image display light from a display unit 3 that the main body 5 has by the combiner 2. The main body 2 or combiner 2 is provided with an insertion part 11 and the other is provided with a recessed part 12 into which its insertion part 11 is inserted so that it can be extracted. The combiner 2 is supported by the main body 5 across the outside surface of the insertion part 11 and the inside surface of the recessed part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display capable of displaying various kinds of information superimposed on a real object in a front view of an observer, for example, to be installed in a vehicle such as a dashboard of an automobile. Suitable.

[0002]

2. Description of the Related Art For example, a head-up display is used to provide navigation information to a driver of an automobile. This allows the driver to view the navigation information without having to look away from the front view,
Contribute to accident prevention.

A conventional head-up display includes a combiner disposed in front of an observer and a main body having a display device for emitting image display light, and the optical path of the image display light is changed by the combiner. A virtual image of the observation target is formed in front of the combiner.

Conventionally, the combiner is supported by a main body via a hinge so that the normal direction of the optical path changing surface of the combiner can be changed. The position at which the virtual image is formed can be changed by changing the normal direction.

[0005]

However, when the combiner is supported by the main body via the hinge, the stress based on the bending moment or the like generated by the external force acting on the combiner concentrates on the hinge attachment portion of the main body. Act. Therefore, it is necessary to increase the thickness of the hinge attachment portion in the main body to improve the strength. Alternatively, it is necessary to insert a long shaft as a rotation axis of the hinge into the main body and support the combiner by the main body via the outer peripheral surface of the shaft, thereby distributing the locations where the stress is applied. Therefore, there is a problem that a space for installing components such as an electric circuit inside the main body is narrowed.

Further, it is necessary to firmly attach the hinge to the combiner and the main body with screws or the like so that the combiner does not move. Therefore, there is a problem that it is difficult to separate the combiner from the main body for maintenance such as cleaning.

[0007] The size of the hinge is limited so as not to enlarge the main body. Therefore, when an external force such as a pulling force acts on the hinge via the combiner, there is a problem that the hinge is deformed or damaged.

A plurality of grooves are formed around the center of rotation of the hinge on one of the main body and the combiner, and a holding member having a projection which can be fitted into the groove is mounted on the other of the main body and the combiner. It is possible.
When the protrusion is fitted into any of the plurality of grooves,
The position of the combiner with respect to the main body can be held. However, it is necessary to provide the plurality of grooves near the center of rotation of the hinge so as not to increase the size of the device. Therefore, the position adjustment pitch of the combiner becomes large,
Cannot perform fine position adjustment.

[0009]

According to the present invention, there is provided a head having a combiner and a main body having an image display light emitting means, and forming a virtual image of an observation object by changing an optical path of the image display light by the combiner. In the up display, an insertion portion is provided on one of the main body and the combiner, and a concave portion is provided on the other of the main body and the combiner so that the insertion portion can be pulled out, and an outer surface of the insertion portion and an inner surface of the concave portion. And the combiner is supported by the main body.

According to the structure of the present invention, a stress based on a bending moment or the like generated by an external force acting on the combiner acts on the main body via the outer surface of the insertion portion and the inner surface of the concave portion. As a result, the location where the stress acts is dispersed throughout the region where the outer surface of the insertion portion and the inner surface of the concave portion are in contact.
Therefore, it is possible to prevent breakage of the connection portion between the main body and the combiner without restricting the internal space of the main body for improving the strength and without inserting a long shaft into the main body, so that components inside the main body can be prevented. The arrangement becomes easy. In addition, since the combiner can be separated from the main body by pulling out the insertion portion from the concave portion, maintenance such as cleaning of the combiner becomes easy.

In the present invention, the outer surface of the insertion portion and the inner surface of the recess are curved so that the normal direction of the optical path changing surface of the combiner changes according to the insertion depth of the insertion portion with respect to the recess. Is preferred. Alternatively, it is preferable that the outer surface of the insertion portion and the inner surface of the recess follow a cylindrical surface so that the rotation of the insertion portion with respect to the recess changes the normal direction of the optical path changing surface of the combiner. This allows
When the combiner is supported by the main body via the outer surface of the insertion portion and the inner surface of the recess, the position of the combiner with respect to the main body can be adjusted.

In the present invention, it is preferable that the insertion portion can apply elasticity to the concave portion, and the position of the insertion portion with respect to the concave portion can be held by the frictional force generated by the action of the elasticity. Alternatively, when the normal direction of the optical path changing surface of the combiner changes due to a change in the insertion depth of the insertion portion with respect to the recess, a plurality of grooves are formed in one of the insertion portion and the recess in the insertion direction of the insertion portion with respect to the recess. A holding member, which is provided so as to be in parallel with the main body and the combiner and has a protrusion that can be fitted into each groove, is detachable, and the protrusion is fitted into any one of the grooves, so that the recessed portion with respect to the concave portion is formed. It is preferable that the position of the insertion portion can be held. Thus, fine adjustment of the position of the combiner with respect to the main body is possible, and the position of the displayed virtual image can be finely adjusted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.

The head-up display 1 for a vehicle shown in FIGS. 1 and 2 includes a hollow main body 5 and a combiner 2 attached to the main body 5. The image display 3 and the mirror 8 are built in the main body 5.

The main body 5 is attached to, for example, the upper surface of a dashboard, so that the combiner 2 and the image display 3 are arranged in front of the observer (driver) (left side in FIG. 1). An opening 5a for emitting image display light is formed in the upper part of the main body 5.

The image display 3 emits image display light L corresponding to, for example, navigation information and the like, and can be constituted by a liquid crystal display device with a backlight, a CRT display device, or the like.

The image display light L travels obliquely upward and forward by being reflected by the mirror 8 after traveling backward, and reaches the combiner 2. The combiner 2
Changes the optical path of the image display light L and guides it to the pupil E of the observer. The combiner 2 can be composed of, for example, a plate-like half mirror, a hologram element, or the like. When a half mirror is used, the optical path of the image display light L is changed by reflection. When a hologram element is used, the optical path of the image display light L is changed by diffraction. By changing the optical path of the image display light L by the combiner 2, a virtual image of the observation target is formed at a position P in front of the combiner 2. Since the combiner 2 transmits light from the front, the observer can visually recognize both the virtual image and the real entity in the front. The optical path changing surface 2a of the combiner 2 and the reflecting surface 8a of the mirror 8
Are curved so as to have a collimating function of condensing the image display light L. By the collimating function, the distance from the combiner 2 to the virtual image is made longer than the optical path length of the image display light L from the display 3 to the combiner 2.

At the lower ends on both sides of the combiner 2, a pair of insertion portions 11 projecting downward are provided. In each of the insertion portions 11, the dimension between the outer front and rear portions 11a and 11b is larger than the dimension between the outer surface side portions 11c and 11d.
A pair of recesses 12 are provided on both sides of the main body 5. The upper end and the outer side of each recess 12 are open. One insertion portion 11 is inserted into one recess 12 and the other insertion portion 1
1 is inserted into the other recess 12. In each of the insertion portions 11, the outer front portion 11a contacts the inner front portion 12a of the recess 12, the outer rear portion 11b contacts the inner rear portion 12b of the recess 12, and the outer one side portion 11c contacts the inner side portion 12c of the recess portion 12. Touch,
Thereby, the combiner 2 is supported by the main body 5 via the outer surface of the insertion portion 11 and the inner surface of the concave portion 12.

The front and rear portions 11a and 11b of the outer surface 11 of each insertion portion 11 are changed so that the normal direction of the optical path changing surface 2a of the combiner 2 changes as the insertion depth of each insertion portion 11 into each recess 12 changes. Front and rear portions 12a of the inner surface of each recess 12;
12b is curved so as to follow a forward convex arc.
A circular arc along which a front portion 11a of the outer surface 11 of each insertion portion 11 and a front portion 12a of the inner surface of each concave portion 12 extend;
The rear portion 11b is concentric with the arc along which the rear portion 12b of the inner surface of each recess 12 extends. Thereby, for example, when the insertion depth is increased, the combiner 2 changes from the state shown by the solid line to the state shown by the two-dot chain line in FIG. 1, and the normal direction of the optical path changing surface 2 a with respect to the front-back direction The angle formed changes by θ in the figure.

A plurality of mutually parallel grooves 11 e are formed in the outer surface 11 d of the outer surface of each insertion portion 11.
1 are provided in parallel in the insertion direction. Body 5
The holding members 15 are detachably attached to both sides by screws 16. As shown in FIG. 3, the holding member 15 has a projection 15a that can be fitted into each groove 11e. The insertion of the insertion portion 11 with respect to the concave portion 12 is enabled by fitting the projection 15a into one of the grooves 11e.

According to the above configuration, a stress based on a bending moment or the like generated by an external force acting on the combiner 2 acts on the main body 5 via the outer surface of the insertion portion 11 and the inner surface of the concave portion 12. Therefore, the locations where the stress acts are dispersed throughout the area where the outer surface of the insertion portion 11 and the inner surface of the concave portion 12 are in contact. Thereby, it is not necessary to limit the internal space of the main body 5 to improve the strength, and it is possible to prevent the connection portion between the main body 5 and the combiner 2 from being damaged without inserting a long shaft into the main body, Parts arrangement inside the main body 5 becomes easy. Further, after the holding member 15 is removed from the main body 5, the combiner 2 can be separated from the main body 5 by pulling out the insertion portion 11 from the concave portion 12, so that maintenance such as cleaning of the combiner 2 becomes easy. Further, by changing the insertion depth of the insertion portion 11 into the concave portion 12, the position of the combiner 2 with respect to the main body 5 can be adjusted, thereby changing the position of the displayed virtual image. At this time, since the position of the insertion portion 11 with respect to the concave portion 12 can be held by changing the position of the groove 11e into which the projection 15a of the holding member 15 is fitted, fine position adjustment of the combiner 2 with respect to the main body 5 can be performed. Becomes possible,
The position of the displayed virtual image can be finely adjusted.

FIGS. 4 and 5 show a second embodiment of the present invention. The difference from the first embodiment is that the combiner 2
A pair of insertion portions 11 'projecting downward from lower ends on both sides of the
The dimension between the outer front and rear portions 11a 'and 11b' is smaller than the dimension between the outer side portions 11c and 11d. A pair of concave portions 12 ′ into which the respective insertion portions 11 ′ can be pulled out are provided in the main body 5 so that only the upper end is opened. Each of the insertion portions 11 ′ has an outer front portion 11 a ′ having a recess 1.
2 'contacts the inner front portion 12a', the outer rear portion 11b 'contacts the inner rear portion 12b' of the recess 12 ', and the outer one side 1
1c 'contacts one side 12c' of the inner surface of the recess 12 ', and the other side 11d' of the outer surface contacts the other side 12d 'of the recess 12', whereby the combiner 2 is inserted into the insertion portion 11 '.
Is supported by the main body 5 via the outer surface of the main body 5 and the inner surface of the concave portion 12 '. The front and rear portions 11a 'of the outer surface 11' of each insertion portion 11 'are changed so that the normal direction of the optical path changing surface 2a of the combiner 2 changes according to the change of the insertion depth of each insertion portion 11' with respect to each recess 12 '. 11b 'and the front and rear portions 12a' and 12b 'of the inner surface of each concave portion 12' are curved along an arc. Each insertion portion 11 'is provided with a notch 11 extending in the vertical direction between the one side portion 11c' and the other side portion 11d 'of the outer surface.
e ', and can be elastically displaced back and forth. As shown in FIG. 5, the notch 1
1e 'and one side 11c', a notch 11e '
In the natural state before insertion into the concave portion 12 ′, the portion between the second side portion 11 d ′ and the other side portion 11 d ′ are arranged to be shifted back and forth with respect to each other. As a result, each insertion portion 11 ′ is
2 ', the notch 11e' and one side 11c '
And the portion between the notch 11e 'and the other side portion 11d' are elastically displaced back and forth by being pushed on the inner surface of the concave portion 12 ', and the displacement between the front and back is corrected. You. Due to the elastic displacement, the insertion portion 11 'is turned into the recess 12'.
Apply elasticity to The position of the insertion portion 11 'with respect to the concave portion 12' is held by the frictional force generated by the action of the elasticity. The concave portion 1 of the insertion portion 11 'is opposed to the frictional force.
The normal direction of the optical path changing surface 2a of the combiner 2 can be changed steplessly by changing the insertion depth into the 2 '. Other parts are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals.

FIGS. 6 and 7 show a third embodiment of the present invention. The difference from the first embodiment is that the combiner 2
A pair of insertion portions 11 ″ projecting downward from the lower ends on both sides of the
, The outer surface 11a "of each insertion portion 11" is along the cylindrical surface. Further, the inner surfaces 12a "of the pair of recesses 12" into which the respective insertion portions 11 "are removably inserted are along the cylindrical surface. The outer surface 11a" of each of the insertion portions 11 "is the inner surface 12a" of the recess 12 ".
, So that the combiner 2 is inserted into the insertion portion 1
It is supported by the main body 5 via an outer surface 11a "of 1" and an inner surface 12a "of the recess 12". Further, the rotation of each insertion portion 11 ″ with respect to each recess 12 ″ about the center of the cylindrical surface changes the normal direction of the optical path changing surface 2 a of the combiner 2. The two-dot chain line and the solid line in FIG. 7 indicate the position of the combiner 2 before and after the rotation. Each insertion portion 11 "has a notch 11e" and can be elastically displaced in the radial direction. In the natural state before each insertion portion 11 "is inserted into the recess 12", the outer diameter thereof is slightly larger than the diameter of the cylinder along which the inner surface 12a "of the recess 12" extends. Thus, when each of the insertion portions 11 "is inserted into the recess 12", the insertion portion 11 "is elastically deformed in the radial direction. The elastic deformation causes the insertion portion 11" to act on the recess 12 ", and the elasticity is reduced. The position of the insertion portion 11 "is held with respect to the recess 12" by the frictional force generated by the action. By rotating the insertion portion 11 "with respect to the recess 12" against the frictional force, the optical path of the combiner 2 is changed. The normal direction of the surface 2a can be changed steplessly, and the other parts are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals.

The present invention is not limited to the above embodiment. For example, in the first and second embodiments, the front and rear portions of the outer surface of each insertion portion and the front and rear portions of the inner surface of each concave portion may be curved so as to follow a rearwardly protruding arc. Further, the insertion portion may be provided in the main body, and the concave portion may be provided in the combiner. Also, the insertion portion and the recess may be respectively single,
The number may be three or more. In the case where the insertion portion and the concave portion are each single, it is preferable to make the width of the insertion portion and the concave portion larger than in the above embodiment.

[0025]

According to the present invention, it is possible to prevent breakage of the connection portion between the main body and the combiner, to easily arrange the components inside the main body, and to easily separate the combiner from the main body for maintenance such as cleaning. And a head-up display that can form a virtual image of the observation target at a position where the virtual image can be easily viewed by adjusting the position of the virtual object.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view for explaining a configuration of a head-up display according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a head-up display according to the first embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of the head-up display according to the first embodiment of the present invention.

FIG. 4 is a partial perspective view of a head-up display according to a second embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of a head-up display according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a head-up display according to a third embodiment of the present invention.

FIG. 7 is a partial side view of a head-up display according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head-up display 2 Combiner 3 Image display 5 Main body 11, 11 ', 11 "Insertion part 12, 12', 12" Depression

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukiko Kuwayama 1-Nishinokyo Kuwaharacho, Nakagyo-ku, Kyoto-shi, Kyoto, Japan Inside Shimadzu Sanjo Plant

Claims (5)

[Claims] 1. A head-up display comprising a combiner and a main body having an image display light emitting means, wherein the combiner changes an optical path of the image display light to form a virtual image of an observation target. An insertion portion is provided on one of the main body and the combiner, and a concave portion is provided on the other of the main body and the combiner so that the insertion portion can be pulled out, and the combiner is connected via an outer surface of the insertion portion and an inner surface of the concave portion. A head-up display supported by a main body. 2. An outer surface of the insertion portion and an inner surface of the recess are curved so that a normal direction of an optical path changing surface of the combiner changes according to a change in an insertion depth of the insertion portion with respect to the recess. The head-up display according to 1. 3. The head according to claim 1, wherein an outer surface of the insertion portion and an inner surface of the recess are along a cylindrical surface so that a normal direction of an optical path changing surface of the combiner changes by rotation of the insertion portion with respect to the recess. Up display. 4. The insertion part according to claim 1, wherein the insertion part is capable of exerting elasticity on the concave part, and the position of the insertion part with respect to the concave part is maintained by a frictional force generated by the elasticity. The head-up display according to any one of the above. 5. A plurality of grooves are provided on one of the insertion portion and the concave portion so as to be parallel to the insertion direction of the insertion portion with respect to the concave portion, and the other of the main body and the combiner has a protrusion which can be fitted into each groove. 3. The position of the insertion portion with respect to the concave portion can be held by fitting and removing the holding member having the detachable member and fitting the protrusion into one of the grooves.
The head-up display according to 1.