JPH11352905A - Head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desk-top device that changes the combiner to its open standing position or its closed lying position. SOLUTION: In this display device, a combiner holder 2 of a combiner 1 has a turn longitudinal shaft 4, so that a turn mechanism for the combiner 1 via the shaft 4 is provided between the combiner holder 2 and ends of a body, and the turn mechanism is also provided with a spring 3 to turn the combiner 1 to either state of its open position or of its closed position.

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 device, and more particularly to a stationary head-up display device used on a dashboard of a vehicle.

[0002]

2. Description of the Related Art A head-up display (hereinafter, referred to as HUD) has recently been used as a method for displaying information to a driver or the like in a vehicle. In this method, light including information projected from a light emitting unit such as a liquid crystal display device is reflected on a combiner formed of a half mirror or the like, so that the driver can read the information from the driving state without moving his or her eyes. .

[0003] In this HUD, a combiner is formed on a windshield, light emitting means for generating light including information is installed in a dashboard, and light from the light emitting means is irradiated on the combiner and reflected so that a driver or the like can reflect the light. In addition to a HUD that is visually recognized by an observer, a so-called stationary HUD that integrates a light emitting unit and a combiner is known. Since this stationary HUD does not form a combiner on the windshield, it can be easily installed on the dashboard to obtain the function of the HUD even when retrofitted, and can be easily removed. There is an advantage that it can be installed at a position.

FIG. 6 is a schematic view showing the whole of such a conventional stationary HUD device. Here, 41 is a stationary HUD main body, 42 is a combiner, 44 is light containing information, and 45 is an observation position of an observer such as a driver. Here, the stationary HUD main body 41 is installed on a dashboard of a vehicle or the like, and is operated by a power supply and a signal supplied by a navigation system or the like.
Light including information emitted from a light source and a display element as light emitting means in the main body 41 is irradiated to the combiner 42, reflected, and recognized at an observation position 45 of an observer such as a driver.

In the above-mentioned use state, the combiner 42 is used in an almost upright (standing) open position, but in the non-use state, the combiner 42 is closed (sleeping) almost parallel to the installation surface of the stationary HUD device. Often a position. For this reason, the combiner 42 is supported and rotated by a shaft provided at a part of the combiner or at an end of a support member holding the combiner.

FIG. 5 is a schematic view showing a main part of a rotating mechanism of a combiner in the conventional stationary HUD device. Here, 42 is a combiner, 43 is a combiner holder which is a support member of the combiner, 34 is a spring, 35 is a rotating shaft provided on the combiner holder, and 36 is a sawtooth-shaped portion provided on the combiner holder. In FIG. 5, an end of the combiner 42 is held by a combiner holder 43. As shown, the combiner holder 43 is provided with rotating shafts 35 at both ends in the longitudinal direction. The rotating shafts 35 are gripped by a housing (not shown in FIG. 5) of the stationary HUD body 41, and the combiner 42 is rotatable. What is going on. Further, saw-toothed portions 36 are provided near both ends in the longitudinal direction of the combiner holder 43 as shown in the figure. This serrated portion 36 is a stationary HU
Since it comes into contact with and slides on the spring 34 attached to the housing of the D main body 41, the torque becomes a torque for stopping the rotation of the combiner, and the open and closed positions of the combiner 42 are maintained. In addition, it can be opened and closed by operation of a driver or the like. In addition, the sawtooth shape ensures the force for stopping the rotation, and gives a click feeling.

On the other hand, in recent years, the use of holograms as the above-mentioned combiner has attracted attention because of its simplicity as an optical element and the abundance of added functions. Since the hologram combiner can have not only a reflection function (diffraction function) but also a lens function, it can diffract optical information into the driver's field of view or use other optical systems such as lenses. In both cases, it is possible to form a display virtual image at an arbitrary position, and there is an advantage that the entire apparatus can be downsized. Another feature is that a high-luminance display image can be obtained without losing the foreground luminance.

[0008]

SUMMARY OF THE INVENTION Conventional stationary HU
In the D device, the combiner is raised to a predetermined angle during use (open position), and when unnecessary, the combiner is tilted down to the main body side and closed (closed position). The opening and closing of the combiner is operated by a driver or the like, but it is preferable that the opening and closing operation be simple due to safety issues. For this reason, Japanese Patent Application Laid-Open
According to 31289, a HUD device having a mechanism for rotating the combiner to the open position by applying a pressing force to the combiner in the closed position in a direction opposite to the open position, that is, a force in the direction to further close the closed combiner is provided. Although proposed, the mechanism is complicated, and the HUD device is enlarged, and the price is increased due to an increase in the number of parts and an increase in the number of assembly steps.

On the other hand, it is conceivable that such an opening / closing mechanism is opened / closed using a driving power of a motor or the like by an operation switch. However, the size and the price of the HUD device are similarly increased. For this reason, a stationary HUD that enables simple operation with a simple mechanism and a small number of parts
There has been a need for a mechanism for opening and closing the combiner of the apparatus.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a main body for accommodating a light emitting means, and a light including information emitted from the light emitting means directed to an observer. In a head-up display device including a combiner that reflects or diffracts, a support member is formed at an end of the combiner, and between the support member and an end of the main body in a longitudinal direction of the combiner. A rotation mechanism for rotating the combiner about a parallel axis as a rotation axis is provided, and the rotation mechanism takes only a state of two positions of an open position where the combiner is standing and a closed position where the combiner is sleeping. A head-up display device is provided.

The rotating mechanism includes an elastic force generating member and an elastic force changing member combined therewith to change the elastic force with the rotation of the combiner, wherein the elastic force changing member has the elastic force. At the two positions of the open position and the closed position of the combiner, the position is smaller than the position between them, and the combiner is configured to stop at the two positions. The present invention provides a head-up display device.

Further, the rotation mechanism may include a rotation shaft provided at an end of the support member or the body of the combiner and a cam fixed to the rotation shaft, and an end of the support member or the body of the combiner. And a member for generating an elastic force that is provided on the side where the rotary shaft is not provided, and that holds the cam portion with elastic force therebetween, and stops only in the two positions of the open position and the closed position. The above-mentioned head-up display device is provided, which is made possible.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a head-up display device according to the present invention, a light emitting means may be housed in a main body and may be located at a position facing a combiner arranged at an end of the main body. May be installed at the lower part of the combiner arranged at the end of the horn. In the latter case, the light including the information projected from the light emitting means is reflected by a mirror or the like and irradiated to the combiner.

In the head-up display device of the present invention, a support member is formed at an end of the combiner, and an axis parallel to the longitudinal direction of the combiner is provided between the support member and an end of the main body. A rotation mechanism for rotating the combiner is provided.

The support member may be provided at a lower end of the combiner or at a side end of the combiner. In this form, the end of the combiner may be wrapped around, may be welded with the same type of material as the combiner, or may be joined to the end of the combiner.

The rotating shaft for rotating the combiner may be a single shaft which is parallel to the longitudinal direction of the combiner and penetrates the support member, or may be fixed to the support member by two shafts arranged in a straight line. May be. Further, one or two shafts may be fixed to the end of the main body as described above.

The combiner rotates around the rotation axis,
A rotation mechanism is provided between the support member and the end of the main body so as to take only the two positions of the open position where the combiner stands and the closed position where the combiner is lying.

The rotating mechanism includes an elastic force generating member, and an elastic force changing member combined therewith to change the elastic force with the rotation of the combiner. The elastic force generating member has an elastic force of the combiner. Open position and closed position
It is configured so that the position of the combiner is smaller than the position between them and that the combiner is stopped at the above-mentioned two positions.

Here, as the elastic force generating member, various springs such as a spring and a plate spring can be used.
As the elastic force changing member for changing the elastic force, one in which one of the spring springs is fixed at a position deviated from the rotation center of the rotatable gear or a spring crimped to a non-circular cam whose center of rotation is not the center. And a rotating cam having a special shape such as a rectangular shape sandwiched between bent plate-shaped springs.

The elastic force is smaller at the two positions of the open position and the closed position of the combiner than at the position between them, and the elastic force is set so that the rotation of the combiner stops at the two positions. A force generating member is configured. In other words, the gear attached to the rotating shaft of the support member of the combiner stops rotating in the stable state where the extended spring spring returns to the original state, or the elastic force when the compressed spring spring returns to the original stable state. Push the stop rod into the hole of the cam mounted on the rotation shaft of the support member,
For example, a rectangular cam sandwiched between bent plate-shaped springs stops rotation at a flat portion having no corner. These positions are stable positions and do not deviate from these positions unless an external force is applied.

The members for generating the elastic force, the members for changing the elastic force, and the individual members for stopping the rotation of the combiner are general members, and it is easy to manufacture a rotating mechanism combining the above members because of its simple structure. And high productivity. Further, the produced rotating mechanism functions stably and with good reproducibility, and has an excellent point that failure does not easily occur.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a main part of a rotating mechanism of a combiner having a spring sandwiching a cam in the HUD device of the present invention, and FIG. 2 is a side view showing an operation of the main part in FIG. 1 by changing an angle. 1 and 2, 1 is a combiner,
2 is a combiner holder, 3 is a spring, 4 is a rotating shaft, and 5 is a cam. Here, the spring 3 is a member for generating an elastic force, the cam 5 is a member for changing the elastic force, and the rotation of the cam is stopped at a flat portion having no corner. The angle in FIG. 2 is the angle formed by the combiner with the horizontal direction. L (20) and the like are the holding length L when the angle of the portion held by the spring 3 is 20 ° as described later. In FIG. 2, the configuration is further simplified for explanation of the operation, but as will be described later, the close position of the combiner is set to 0 ° and the open position is set to 75 °, and the angle is sequentially changed.

In FIG. 1, the end of the combiner 1 is held by a combiner holder 2 as a support member. As shown, the combiner holder 2 is provided with rotating shafts 4 at both ends in the longitudinal direction, and the rotating shafts 4 are supported by bearings (not shown) provided in the housing of the stationary HUD body 41. The combiner 1 is rotatable. Furthermore, a diamond-shaped cam 5 is formed in the combiner holder 2 near the longitudinal ends of the combiner holder 2 as shown in the figure, and rotates together with the combiner holder 2. Further, the formation position of the cam 5 is not limited to the combiner holder 2 but may be the rotating shaft 4. This cam 5
Is held so as to be sandwiched by a spring 3 similar to the cross-sectional shape of a petal or vase of a tulip as shown.
The spring 3 is attached to the housing of the stationary HUD main body 41, has an elastic force for sandwiching the cam 5, and is formed so as to push the spring 3 toward a rotating central axis at a portion in contact with the cam 5. It is a thing.

The cam 5 held by the spring 3 has a rhombus shape as shown in FIG. 2, and the angle between the combiner 1 in the closed position and the horizontal direction is 0 ° and the open position is 75 °. , The holding lengths L (0) and L (75) of the portions held by the springs 3 are manufactured to be minimum. The holding length L of the spring 3 is changed by the rotation of the combiner. When the holding length L is 37.5 ° (an angle between the open position and the closed position) in the embodiment, the angle formed by the horizontal direction of the combiner 1 is in the embodiment. Will be the largest. Therefore, when the driver or the like operates the combiner 1 and releases his / her hand, the sliding between the cam 5 and the spring 3 and the force held by the spring 3 are performed at an intermediate angle between the open position and the closed position of the combiner 1. ,
The state is either the open position or the closed position which is a predetermined position. Therefore, if the driver or the like operates the combiner 1 beyond the boundary angle, the combiner 1 is set at a desired position, and there is no need for fine adjustment or the like.

Therefore, a stationary HUD device having a simple configuration and not burdening an operator such as a driver with an operation can be configured.

The shapes of the spring 3 and the cam 5 are not particularly limited as long as similar effects can be obtained without being caught by the shape of the present embodiment.

Next, two examples different from the above are shown in FIGS. FIG. 3 is a side view showing an operation of a main part of a rotating mechanism of a combiner having a gear and a tension spring in the head-up display device of the present invention, wherein 1 is a combiner, and 4 is a rotary shaft. 21, 22, and 23
Denotes a gear A, a gear B and a tension spring, and 0 ° in the figure.
And 75 ° indicate the closed and open positions of the combiner. In FIG. 3, the state where the spring is contracted to the maximum is a stable state, and the diameter and the number of teeth of the gears A and B are adjusted so as to correspond to the closed position and the open position. Here, 23 tension springs are elastic force generating members, 22 gears B are elastic force changing members, and 21 gears A are interlocked with 22 gears B and 23 tension springs, and The rotation of the combiner stops with the tension spring contracted.

FIG. 4 is a side view showing an operation of a main part of a rotating mechanism of a combiner having a cam and a plunger in the head-up display device of the present invention. 25 is a plunger 2
6 is a rod. In FIG. 4, there is a spring (not shown) that pushes the rod 26 inside the plunger 25, and two holes (dents) of the cam 5 are stable positions corresponding to the closed position and the open position. Here, a spring (not shown) is an elastic force generating member, and a combination of the cam No. 5 and the rod 26 is an elastic force changing member. The rotation of the cam 5 causes the rod 26 to move toward the plunger 25 by being pushed by the cam, and to press the spring spring to change the elastic force. When the rod 26 is inserted into the hole of the cam 5 by the pressing force of the spring, the rotation of the combiner stops.

In the above, examples of a case where an elastic force generating member for holding the cam portion fixed to the support member therebetween and a case where the elastic force generating portion is provided by another method instead of the above case are described. Indicated. The former case is preferable because the components constituting the rotation mechanism including the elastic force generating portion may be simple components, the number of components is small, and the configuration is simple and the size can be reduced as compared with the latter case.

In the present invention, a combiner made of a hologram is used as the combiner. This hologram is an acrylic photopolymer, and is a Lippman type volume / phase hologram. As the hologram material, in addition to the above, various photosensitive materials such as a polyvinyl carbazole-based photopolymer, a dichromated gelatin, a photoresist, and a silver salt-based material can be used. As the hologram type, a volume such as a Lippmann type can be used. A phase type hologram is desirable in that high diffraction efficiency can be obtained, but emboss type and rainbow type can also be widely used. And the hologram is
Considering the wavelength of the display element, the wavelength is 530 nm and the incident angle is 2
This is a reflection hologram that has been exposed and manufactured so as to have a diffraction angle of 0 °, a diffraction angle of 20 °, and a magnification of 2.5. The size of the hologram was set to 50 mm (length) × 114 mm (width).

Here, the hologram is sealed in a laminated glass. That is, a hologram is attached to the surface of a glass substrate, and a cover glass plate provided with an antireflection film is laminated on the surface of the hologram via a matching intermediate film such as polyvinyl butyral. The laminated glass combiner in which the hologram is sealed is held at an angle of 75 ° with respect to the horizontal direction.

The hologram is preferably used by being enclosed in a laminated glass as described above in order to protect the hologram from external factors such as external impact. More specifically, a laminated glass is obtained by laminating and bonding a resin film such as polyvinyl butyral or polyurethane to at least one sheet of glass. Examples of the form include a glass plate / resin film and a glass plate / resin film / There are glass plates, glass plates / resin films / resin substrates. The hologram may be sealed at the boundary between these glass plates or resin films. The glass plate on which the hologram is mounted may be colored, or may be provided with an antireflection film, a black ceramic, a heat ray reflection film, or the like on the surface.

A glass plate is most suitable for holding a hologram because it has little thermal deformation, but a resin substrate is preferred in place of a glass plate from the viewpoint of cost, weight reduction and prevention of danger due to cracking. Also in this case, it is preferable to seal the hologram with an adhesive or an adhesive between the two resin substrates because the hologram can be protected from external factors such as external force that damages the hologram. Furthermore, a combination of a resin substrate and a transparent resin film may be used, and an antireflection film or a hard coat for protecting the resin substrate may be formed on the surface of the resin substrate.

In this embodiment, a combiner made of a hologram is used as a combiner, but a combiner of a half mirror type may be used. In the case of a half-mirror type, a dielectric mirror or a thin metal film formed on a transparent substrate can be used.

The display element inside the HUD device is 128 × 32 dots and the display area is 44.2 mm × 11 m.
m high brightness dot matrix type fluorescent display tube (VF
D) was used, but in addition to VFD, self-luminous type such as LED, and hot light source such as hot cathode tube, cold cathode tube, tungsten lamp, halogen lamp, metal halide lamp, LE
Various combinations are possible, such as using a D, LD (laser diode) and a transmissive liquid crystal display element. However, considering the simplicity of the configuration, the mountability and the good temperature characteristics, VF
D is preferred.

In addition, when a transmissive liquid crystal display element is used, a segment type LCD, a dot matrix type or a thin film transistor (TFT) active matrix driving type transmissive LCD can be used.
In addition, the display pattern is appropriately selected depending on its use, and examples include a speed display, a vehicle warning light, a direction instruction, a vehicle width light, a display related to a corner marker, character information such as traffic jam information, and the like. The information is not particularly limited as long as it is information. The observer is mainly a driver of the vehicle, and may include other passengers, other passengers, and all of them.

Further, a network for control means for automatically adjusting the brightness of the VFD based on the light receiving sensor and the ambient brightness in the main body, and / or a network for control means for manually adjusting the brightness of the VFD. Is provided, it is possible to obtain a display image having a brightness corresponding to the surrounding brightness, and it is also possible to manually adjust the brightness, so that the brightness can be adjusted as desired by the individual, and the visibility is improved. It is more preferable.

In addition, a folding mirror, a concave mirror, a prism, a lens, and the like are provided in the optical path from the display element to the combiner.
Optical members such as a color filter and a polarizing element may be provided, and various optical members may be provided in order to prevent optical aberration of a display image and obtain a desired size of the display image. Further, aberration can be corrected by using two holograms by using another hologram. However, a simple configuration is preferable in consideration of an increase in the number of parts, price, and size.

The HUD device of the present invention is preferably installed on the dashboard of a vehicle within a natural field of view such as a driver as an observer. However, the present invention is not limited to this. But it can be installed.

[0040]

As described above, according to the present invention, it is easy to change the state between the open position when the combiner is standing and the closed position when the combiner is sleeping,
In addition, it is possible to obtain a compact stationary head-up display device having few components.

Further, the HUD of the present invention is not limited to a vehicle-mounted type,
Since it can be installed anywhere as long as there is space, it can be used as a general display device, and can be used in various ways depending on the display contents.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a main part of a rotation mechanism of a combiner having a spring sandwiching a cam in a head-up display device of the present invention.

FIG. 2 is a side view showing an operation of a main part of a rotation mechanism of a combiner having a spring sandwiching a cam in the head-up display device of the present invention by an angle change.

FIG. 3 is a side view showing an operation of a main part of a rotating mechanism of a combiner having a gear and a tension spring in the head-up display device of the present invention.

FIG. 4 is a side view showing an operation of a main part of a combiner rotating mechanism having a cam and a plunger in the head-up display device of the present invention.

FIG. 5 is a schematic diagram showing a main part of a combiner rotating mechanism in a conventional head-up display device.

FIG. 6 is a schematic view showing the whole of a conventional head-up display device.

[Explanation of symbols]

 1, 42: Combiner 2, 43: Combiner holder 3, 34: Spring 4, 35: Rotating shaft 5: Cam 21: Gear A 22: Gear B 23: Extension spring 25: Plunger 26: Rod 36: Serrated portion 41: Stationary HUD body 44: Light containing information 45: Observation position

Claims (3)

[Claims] 1. A head-up display device comprising: a main body for accommodating a light emitting means; and a combiner for reflecting or diffracting light including information emitted from the light emitting means toward an observer. A support member is formed in the portion, and a rotation mechanism that rotates the combiner around an axis parallel to a longitudinal direction of the combiner is provided between the support member and an end of the main body portion, The head-up display device is characterized in that the rotation mechanism takes only two positions: an open position where the combiner is standing and a closed position where the combiner is sleeping. 2. The rotating mechanism includes a member for generating an elastic force and an elastic force changing member combined therewith to change the elastic force with the rotation of the combiner, wherein the elastic force changing member has the elastic force. The two positions of the open position and the closed position of the combiner are made smaller than the position between them, and the combiner is configured to stop at the two positions. Item 2. A head-up display device according to Item 1. 3. A rotating shaft provided at an end of a support member or a main body of the combiner, a cam portion fixed to the rotary shaft, and an end of a support member or a main body of the combiner. And a member for generating an elastic force that is provided on the side where the rotary shaft is not provided, and that holds the cam portion with elastic force therebetween, and stops only in the two positions of the open position and the closed position. 3. The head-up display device according to claim 2, wherein the head-up display device is enabled.