JP2009080178A - Head-up display - Google Patents

Head-up display Download PDF

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Publication number
JP2009080178A
JP2009080178A JP2007247584A JP2007247584A JP2009080178A JP 2009080178 A JP2009080178 A JP 2009080178A JP 2007247584 A JP2007247584 A JP 2007247584A JP 2007247584 A JP2007247584 A JP 2007247584A JP 2009080178 A JP2009080178 A JP 2009080178A
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JP
Japan
Prior art keywords
display
head
up display
driver
part
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Pending
Application number
JP2007247584A
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Japanese (ja)
Inventor
Shinya Omura
真也 大村
Original Assignee
Calsonic Kansei Corp
カルソニックカンセイ株式会社
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Application filed by Calsonic Kansei Corp, カルソニックカンセイ株式会社 filed Critical Calsonic Kansei Corp
Priority to JP2007247584A priority Critical patent/JP2009080178A/en
Publication of JP2009080178A publication Critical patent/JP2009080178A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To provide a head-up display capable of improving the in-vehicle property of an apparatus while realizing display at a far distance and at the same time changing the depth and height of a virtual image display.
An apparatus main body 4 having an upper portion inclined toward a driver side is provided, and a display 6 disposed at a lower portion in the apparatus main body 4 so as to project display light, and a driver side of the apparatus main body 4 face inward and outward. And an electromagnetic shutter 8 capable of switching the transmissive portion 11 in the vertical direction, and a reflector disposed in the apparatus main body 4 so as to face the electromagnetic shutter 8. 7, the light is alternately reflected a plurality of times between the non-transparent portion 12 of the electromagnetic shutter 8 and the reflecting portion 7 from the display 6, and then the optical path 107 toward the driver through the transmissive portion 11 of the electromagnetic shutter 8 is formed.
[Selection] Figure 1

Description

  The present invention belongs to the technical field of head-up displays.

Conventionally, the image information of the real image projected and imaged on the imaging member is reflected by the first reflecting mirror toward the second reflecting mirror, and further, the second reflecting mirror is directed toward the windshield of the vehicle. It is reflected, and the windshield is reflected in the driver's visual field direction to display a virtual image (see Patent Document 1).
JP 2004-126226 A

However, the conventional head-up display has a problem in realizing distant display and in-vehicle capability of the apparatus.
The present invention has been made by paying attention to the above-mentioned problems, and the object of the present invention is to improve the in-vehicle performance of the apparatus while realizing display at a further distance, and at the same time, the virtual image display. The object is to provide a head-up display with variable depth and height.

  In order to achieve the above object, in the invention described in claim 1, in a head-up display that is provided separately from the front window shield of a vehicle and displays a virtual image by reflecting display light from the display toward the driver, An apparatus main body having an upper portion inclined toward the driver side is provided, and the display unit disposed at the lower portion in the apparatus main body so as to project display light; And a peephole switching means capable of switching the position of the transmissive portion in the vertical direction, and a reflecting portion disposed in the apparatus body so as to face the peephole switching means. An optical path directed to the driver through the transmissive portion of the peephole switching means after being reflected a plurality of times alternately between the non-transmissive portion and the reflecting portion of the peephole switching means. To.

  According to the first aspect of the present invention, in the head-up display that is provided separately from the front window shield of the vehicle and displays the virtual image by reflecting the display light from the display toward the driver, the upper part is inclined toward the driver side. The display device is provided at the lower part of the device main body so as to project display light, and provided on the driver side of the device main body inside and outside to form a transmissive part and a non-transmissive part. And a peephole switching means capable of switching the position of the transmission portion in the vertical direction, and a reflecting portion disposed in the apparatus body so as to face the peephole switching means. After reflecting between the non-transmission part and the reflection part several times alternately, the optical path to the driver is formed through the transmission part of the peephole switching means, so it is possible to display more distantly While, at the same time it is possible to improve the vehicle mountability of the device can vary the depth and height of the virtual image display.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1 will be described below.
FIG. 1 is a diagram for explaining the arrangement of the head-up display according to the first embodiment, FIG. 2 is a perspective view of the head-up display according to the first embodiment, and FIG. FIG. 4 is a diagram for explaining the position switching of the transmission part in the first embodiment.

  FIG. 5 is a diagram for explaining virtual image display according to the first embodiment, FIG. 6 is a diagram illustrating an example of content displayed as a virtual image according to the first embodiment, and FIG. 7 illustrates switching control of the electromagnetic shutter by the base circuit unit according to the first embodiment. It is a flowchart figure to explain.

First, the overall configuration will be described.
As shown in FIG. 1, the head-up display 1 according to the first embodiment has a lower portion located inside the instrument panel 2 in the vehicle interior and an upper portion located on the driver side (vehicle rear side) of the front window shield 3. It is provided in the state.

As shown in FIGS. 2 and 3, the head-up display 1 includes a device main body 4, a substrate circuit unit 5, a display 6, a reflection unit 7, an electromagnetic shutter 8 (corresponding to a peephole switching unit), and the like. Has been.
The apparatus main body 4 has an internal space 9 and is formed in a substantially rectangular shape, and is provided in an inclined state so that an upper portion thereof approaches the driver side.
The substrate circuit unit 5 is provided on the inner lower surface in the apparatus main body 4, and a control circuit necessary for driving control of the display 6 and the electromagnetic shutter 8 is mounted. At least the vehicle speed can be acquired from the (engine control unit).
The display 6 displays an image and emits it as display light toward the electromagnetic shutter 8. The display 6 is provided on the front side of the vehicle close to the base circuit unit 5. In the first embodiment, the LCD unit includes a backlight. Is adopted.
The display 6 may be configured to project light from behind the display 6 with a light source controlled by the substrate circuit unit 5, or the display 6 may be a unit type provided with a light source.

  The reflection part 7 is provided over the substantially whole length along the vehicle front side wall surface in the apparatus main body 4, and the reflection mirror which performs total reflection is employ | adopted.

  The electromagnetic shutter 8 faces the inside and outside of the apparatus main body 4 along the wall on the vehicle rear side and faces the reflecting portion 7 in parallel, and a thin reflecting member 10 is attached to the lower part inside the electromagnetic shutter 8. ing.

In addition, the electromagnetic shutter 8 according to the first embodiment employs a so-called liquid crystal shutter that is transparent (colorless and transparent) when the element is energized and non-transparent (black) when the element is de-energized. As shown in FIG. 4, the transmissive portion 11 and the non-transmissive portion 12 are changed to place the transmissive portion 11 in the upper position (FIG. 4A), the middle position (FIG. 4B), and the lower position (FIG. 4C). It is possible to switch up and down in three stages.
In the electromagnetic shutter 8, the transmissive portion 11 has appropriate transmittance and reflectance, and the non-transmissive portion 12 reflects with the inherent reflectance with a transmittance of 0%.

Next, the operation will be described.
[Transmission of transmissive part by electromagnetic shutter]
As shown in FIG. 3, in the head-up display 1 of the first embodiment, when the transmission part 11 of the electromagnetic shutter 8 is in the upper position, the display light emitted from the display device 6 is first not transmitted by the electromagnetic shutter 8. Reflected by the portion 12 (optical path 101).

Next, the display light moves upward in the reflection position while being alternately reflected a plurality of times (a total of 5 times in the embodiment) between the reflection portion 7 and the non-transmission portion 12 of the electromagnetic shutter 8 (optical path 102 to optical path). 106).
At this time, the display light of the optical path 101 and the optical path 103 that hits the electromagnetic shutter 8 is reflected by the reflectance of the reflecting member 10, and the display light of the optical path 105 is reflected by the reflectance of the non-transmissive portion 12 of the electromagnetic shutter 8.

Thereafter, the display light is reflected toward the driver through the transmission part 11 of the electromagnetic shutter 8 at the upper end of the reflection part 7, thereby forming an optical path 107 from the transmission part 11 to the driver's eye point 13 (see FIG. 1). Is done.
Thus, a virtual image is displayed as a virtual image 14 on the vehicle front side from the position of the instrument panel 2 on which the head-up display 1 is installed, that is, on the far field side of the front viewed by the driver for driving (see FIG. 5A).

  As described above, in the head-up display 1 of the first embodiment, the display unit transmits the display light between the optical path 107 through which the display unit 6 transmits display light to the driver through the transmission part 11 and the non-transmission part of the electromagnetic shutter 8. The light path length from the reflecting position of the reflecting portion 7 that is reflected so as to send the display light to the driver through the transmissive portion 11 to the display 6 can be increased by reflecting the light 12 and the reflecting portion 7 a plurality of times.

As a result, the distance from the reflection position of the reflection portion 7 that reflects the display light to the driver through the transmissive portion 11 and the virtual image 14 in front of the vehicle becomes long, and as a result, the distance further from the driver becomes more forward. The virtual image 14 is displayed at the position.
Further, the driver sees the display (virtual image 14) of the head-up display 1 as a display closer to the forward field of view that is being viewed for driving.

  On the other hand, as described above, as shown in FIG. 5B, when the transmission portion 11 of the electromagnetic shutter 8 is set to the middle position, the transmission portion 11 passes through the transmission portion 11 as compared with the case where the transmission portion 11 is set to the upper position. Since the optical path length from the reflection position of the reflecting portion 7 that reflects to send display light to the driver to the display 6 is shortened, the virtual image 14 is lower than the virtual image 14 in the upper position and more to the driver. It will be visible nearby.

  Further, as described above, as shown in FIG. 5C, when the transmission portion 11 of the electromagnetic shutter 8 is in the lower position, the transmission portion 11 passes through the transmission portion 11 as compared with the case where the transmission portion 11 is in the middle position. The optical path length from the reflection position of the reflection part 7 reflecting so as to send the display light to the driver to the display 6 is shortened. As a result, the virtual image 14 is lower than the virtual image 14 at the middle position in the driver, and , Will look closer.

  Therefore, in the head-up display 1 according to the first embodiment, the transmissive portion 11 of the electromagnetic shutter 8 is switched to the upper position, the middle position, and the lower position, thereby causing the driver to display the depth and height of the virtual image 14 in three patterns. be able to.

As an example of the virtual image 14, for example, as shown in FIG. 6, a vehicle speed display 14 a that displays the vehicle speed with a unit, a fuel remaining amount display 14 b that displays the remaining fuel level with a level meter, and a guidance to the destination Next, the navigation guidance display 14b for displaying the left turn and displaying the distance to the left turn is performed.
Since these are variable displays by the display device 6, if the display contents are changed according to the state and situation of the vehicle, driving assistance can be performed more satisfactorily.

[Switching action of virtual image depth and height]
Next, switching control of the electromagnetic shutter 8 by the base circuit unit 5 of the first embodiment will be described based on the flowchart of FIG.
The control described below is a process that is repeatedly performed from the start to the stop of the engine.

In the head-up display 1 of the first embodiment, first, in step S1, the vehicle speed V (km / h) is acquired from the ECU. If the vehicle speed is low (for example, V ≧ 40), the process proceeds to step S2, and the medium speed (for example, If 40 <V ≦ 80, the process proceeds to step S3, and if high speed (for example, V> 80), the process proceeds to step S4.
In step S2, the virtual image 14 is displayed with the transmission portion 11 in the lower position, and then the process returns to step S1.
In step S3, the virtual image 14 is displayed with the transmission portion 11 in the middle position, and then the process returns to step S1.
In step S4, the virtual image 14 is displayed with the transmission portion 11 in the upper position, and then the process returns to step S1.

When the head-up display 1 configured in this way is used, the vehicle speed is detected, and when the vehicle speed is low, the virtual image 14 is displayed with the transmission portion 11 in the lower position (step S1 → step S2). .
As a result, the virtual image 14 is viewed at the lowest position and closest to the driver.

Further, when the vehicle speed becomes medium speed, the virtual image 14 is displayed with the transmission portion 11 in the middle position (step S1 → step S3).
As a result, the virtual image 14 appears to the driver at a higher position and at a distance than at low speed.

Further, when the vehicle speed is increased, the virtual image 14 is displayed with the transmission portion 11 at the upper position (step S1 → step S4).
As a result, the virtual image 14 appears to the driver at the highest position and the farthest.

  Here, the driver is more focused on the outside of the vehicle when the vehicle is traveling at high speed, and the virtual image is preferably located at a high position due to narrowing of the effective field of view. Since it is less troublesome to locate the virtual image at a low position in order to recognize information, switching the virtual image according to the traveling speed is effective for improving the visibility.

  On the other hand, in the first embodiment, the depth and height of the virtual image 14 can be linked and displayed on the line of sight (field of view) of the driver that moves farther as the vehicle speed increases from low speed to high speed. This is preferable.

[Miniaturization]
The head-up display 1 performs a distant display by repeating reflection a plurality of times between the electromagnetic shutter 8 and the reflection unit 7 arranged to face each other. Therefore, the portion constituting this optical path length becomes a very small space.
Moreover, since the outer wall of the apparatus main body 4 that covers the periphery of the electromagnetic shutter 8 and the reflecting portion 7 is installed on the instrument panel 2, the part that interferes with the instrument panel 2 is about the part of the display 6 and is mounted on the vehicle. Excellent.

[Action to prevent windowing]
The head-up display 1 forms an internal space 9 that becomes an optical path by the cylindrical portion of the apparatus main body 4.
The internal space 9 has a rectangular cross section and a size that allows for an adjustment allowance on the display surface of the display 6.
Therefore, it is difficult to form an optical path in the apparatus main body 4 from the display 6 to the transmission portion 11 so that the display light from the display 6 leaks and is reflected by the front window shield 3 and enters the driver field of view.
As a result, display light from the display device 6 leaks and is reflected by the front window shield 3 and enters the driver's field of view, so-called window reflection can be prevented.

Further, the head-up display 1 forms an internal space 9 serving as an optical path by the cylindrical part of the apparatus main body 4, and the rectangular transmission part 11 having a size including the adjustment amount of the eye point 13 is replaced with the cylinder of the apparatus main body 4. At the top of the shape, it is set to the position on the driver side.
Further, the transmission part 11 is provided in an inclined shape so that the upper part approaches the driver.
For this reason, it becomes difficult to form an optical path through which the transmissive portion 11 is projected by external light.
Therefore, it is possible to prevent the transmissive portion 11 from being reflected by the external light and appearing in the window.

Finally, the effect of the first embodiment will be described.
As described above, in the head-up display 1 according to the first embodiment, the head is provided separately from the front window shield 3 of the vehicle and displays the virtual image by reflecting the display light from the display 6 toward the driver. In the up display 1, an apparatus main body 4 whose upper part is inclined toward the driver side is provided, and a display 6 disposed at the lower part in the apparatus main body 4 so as to project display light, and inward and outward on the driver side of the apparatus main body 4. The electromagnetic shutter 8 is provided so as to form a transmissive portion 11 and a non-transmissive portion 12 and the transmissive portion 11 can be switched in the vertical direction, and a reflection disposed in the apparatus main body 4 so as to face the electromagnetic shutter 8. And a driver through the transmissive part 11 of the electromagnetic shutter 8 after being reflected a plurality of times alternately between the non-transmissive part 12 and the reflective part 7 of the electromagnetic shutter 8 from the display 4. Since the formation of the optical path 107 toward, while realizing to display more distant at the same time it is possible to improve the vehicle mountability of the device can vary the depth and height of the virtual image display.

  Further, by using the electromagnetic shutter 8, the transmissive part 11 and the non-transmissive part 12 can be easily formed. For example, a structure in which an opening is provided in the apparatus body 4 and the opening position can be changed by a shield is adopted. Compared to the case, the transmission part can be moved instantaneously, and it is inexpensive, has high operational reliability, and is easy to implement.

  In addition, since the electromagnetic shutter 8 switches the position of the transmission part 11 up and down according to the increase or decrease of the vehicle speed, the depth and height of the virtual image 14 can be displayed according to the driver's line of sight according to the vehicle speed, which is preferable. .

Example 2 will be described below.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and only differences will be described in detail.
FIG. 8 is a side sectional view of the head-up display of the second embodiment.

As shown in FIG. 8, in the head-up display 1 according to the second embodiment, the electromagnetic mirror 6 according to the first embodiment uses the reflecting mirror 30 instead of the portion that is always the non-transmissive portion 12 for the purpose of extending the optical path. Different from Example 1.
In the second embodiment, the reflection mirror 31 is provided so as to be flush with the inner surface of the electromagnetic shutter 8. However, a wall portion is formed on the same surface as the inner surface of the electromagnetic shutter 8, and the reflection mirror 30 is disposed inside the reflection mirror 31. It may be provided.

  Therefore, in the head-up display according to the second embodiment, in addition to the operations and effects of the first embodiment, it is possible to obtain an effect that the electromagnetic shutter 6 can be reduced in size while ensuring a necessary optical path length.

Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.
For example, a plurality of electromagnetic shutters 8 may be provided in the vertical direction, and the number of virtual image depth and height patterns can be set as appropriate.
The electromagnetic shutter 8 may use an organic EL in addition to the liquid crystal shutter.

FIG. 3 is a diagram illustrating the arrangement of a head-up display according to the first embodiment. 1 is a perspective view of a head-up display of Example 1. FIG. 1 is a side sectional view of a head-up display of Example 1. FIG. It is a figure explaining the position switching of the transmission part of Example 1. FIG. FIG. 6 is a diagram illustrating a virtual image display according to the first embodiment. 6 is a diagram illustrating an example of content displayed as a virtual image of Example 1. FIG. It is a flowchart explaining switching control of the electromagnetic shutter by the base circuit unit of the first embodiment. It is a sectional side view of the head-up display of Example 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Head up display 2 Instrument panel 3 Front window shield 4 Apparatus main body 5 Board | substrate circuit part 6 Display 7 Reflection part 8 Electromagnetic shutter 9 Internal space 10 Reflective member 11 Transmission part 12 Non-transmission part 13 Eye point 14 Virtual image 14a Vehicle speed display 14b Fuel Remaining amount display 14c Navigation guidance display 100 to 107 Optical path 30 Reflection mirror

Claims (4)

  1. In a head-up display that is provided separately from the front window shield of the vehicle and displays a virtual image by reflecting display light from the display toward the driver,
    A device body with the upper part inclined to the driver side is provided.
    The indicator arranged at the lower part in the apparatus main body so as to project display light; and
    A peephole switching means that is provided facing the driver side of the apparatus main body inside and outside, forms a transmission part and a non-transmission part, and can switch the position of this transmission part in the vertical direction;
    In the apparatus body, provided with a reflection portion arranged facing the peephole switching means,
    An optical path which is reflected from the display unit alternately between a non-transmission part and a reflection part of the peep hole switching means a plurality of times and then passes through the transmission part of the peep hole switching means to the driver. Up display.
  2. The head-up display according to claim 1.
    A head-up display wherein the peephole switching means is an electromagnetic shutter.
  3. The head-up display according to claim 1 or 2,
    The head-up display characterized in that the peephole switching means switches the position of the transmissive part up and down in accordance with increase or decrease in vehicle speed.
  4. In the head up display in any one of Claims 1-3,
    A head-up display, wherein a part that is always a non-transparent portion in the electromagnetic shutter is replaced with a reflection mirror.
JP2007247584A 2007-09-25 2007-09-25 Head-up display Pending JP2009080178A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010179854A (en) * 2009-02-07 2010-08-19 Calsonic Kansei Corp Head-up display for vehicle
EP2234427A2 (en) 2009-03-27 2010-09-29 NTT DoCoMo, Inc. Radio communications system and radio communications method
JP2014098876A (en) * 2012-11-16 2014-05-29 Asahi Kasei E-Materials Corp Head-up display device
JP5602315B2 (en) * 2011-10-04 2014-10-08 三菱電機株式会社 Liquid crystal display
JP2015112974A (en) * 2013-12-10 2015-06-22 カルソニックカンセイ株式会社 Head-up display
JP2015534125A (en) * 2012-10-17 2015-11-26 ルノー エス.ア.エス. Head-up display device and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010179854A (en) * 2009-02-07 2010-08-19 Calsonic Kansei Corp Head-up display for vehicle
EP2234427A2 (en) 2009-03-27 2010-09-29 NTT DoCoMo, Inc. Radio communications system and radio communications method
JP5602315B2 (en) * 2011-10-04 2014-10-08 三菱電機株式会社 Liquid crystal display
JP2015534125A (en) * 2012-10-17 2015-11-26 ルノー エス.ア.エス. Head-up display device and method
JP2014098876A (en) * 2012-11-16 2014-05-29 Asahi Kasei E-Materials Corp Head-up display device
JP2015112974A (en) * 2013-12-10 2015-06-22 カルソニックカンセイ株式会社 Head-up display

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