JP2006069473A - Head-up display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headup display (HUD) capable of preventing the external light from getting into the eyes of the driver upon being reflected by the HUD even without provision of an exclusive wall. <P>SOLUTION: The HUD is configured with a case 1, shutters 1a and 1b, a display 2, a combiner 3, a turn-back mirror 4, and a dust cover 5. The section of the dust cover 5 is shaped in a chevron whose flank consists of a transparent surface 5a and an opaque surface 5b. When the HUD is used, the shutters 1a and 1b are opened and the combiner 3 is raised up and elevated, and then the dust cover 5 is elevated. At this time, the dust cover 5 is held so that the transparent surface 5a is positioned not horizontally but obliquely. The shutter 1a is held on an optical path 73a whereto the external light 73 enters to the transparent surface 5a when the shutter 1a is opened. Therefore, the external light reflected by the dust cover 5 can be prevented from getting into the eyes of the driver. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a head-up display (hereinafter referred to as HUD) that displays information to a driver using a combiner.

  Conventionally, as one of HUDs, there is a configuration having a combiner different from a windshield and a display. This is because a combiner composed of a half mirror is placed on the top surface of the instrument panel (dashboard) and projected from a display such as a liquid crystal display onto this combiner located on the driver side of the windshield. By making the incident light incident, a virtual image is displayed on the combiner (see, for example, Patent Documents 1 and 2).

  This type of HUD is a so-called pop-up type that raises the combiner when it is not in use and raises the combiner so that an image is displayed on the combiner when it is in use. There is something.

Furthermore, as one of the pop-up type HUDs, it has a case for housing the display unit and the combiner, and a shutter for opening and closing an opening provided on the upper surface of the case. When the shutter is closed, the combiner falls down. When the shutter is opened, the combiner stands up so as to protrude from the opening (for example, see Patent Document 2).
JP-A-11-85052 Japanese Patent Laid-Open No. 11-91403

  FIG. 15 shows the configuration of the HUD studied by the present inventors. As shown in FIG. 15, the HUD includes a case 1, a display device 2, a combiner 3, a folding mirror 4, and a dustproof cover 5. The left side in the figure is the vehicle front side, and the right side in the figure is the driver side.

  When the HUD is not used, the display 2, the combiner 3, and the folding mirror 4 are housed inside the case 1, and when the HUD is used, the combiner 3 rises.

  The combiner 3 has a display unit 3a, and the display unit 3a is constituted by a half mirror (concave mirror). The folding mirror 4 reflects the light (video) projected from the display 2 and makes the light incident on the display unit 3a. The dustproof cover 5 prevents dust from entering the case 1 when the combiner 3 is raised. The dustproof cover 5 is designed to transmit light, and the surface of the dustproof cover 5 is horizontal.

  And when using HUD, as shown in FIG. 15, the light (image | video) 6a is projected from the indicator 2 toward the front (left direction in a figure) of a vehicle. The light 6 a is reflected upward by the folding mirror 4, and the reflected light 6 b is incident on the display unit 3 a of the combiner 3. The reflected light 6c reflected by the display unit 3a enters the eyes of the driver.

  Accordingly, the driver can visually recognize the enlarged image on the display unit 3a of the combiner 3 by superimposing the enlarged image on the front scenery.

  However, it has been found that the HUD configured as described above has a problem that external light such as the sun is reflected by the HUD and enters the eyes of the driver, which dazzles the driver.

  For example, as described above, when the dustproof cover 5 having a horizontal surface is provided, the external light 71 is reflected by the dustproof cover 5 and enters the driver's eyes. Further, the external light 72 is reflected by the folding mirror 4, and the reflected light is further reflected by the windshield (not shown in the figure) and enters the driver's eyes.

  Therefore, as a countermeasure, it is conceivable to provide the HUD with dedicated walls for preventing the outside light 71 and 72 from being reflected on the dust-proof cover 5 and the folding mirror 4 and entering the eyes of the driver. However, providing a dedicated wall is not preferable because the size of the case 1 (mainly in the height direction) increases.

  A method of coating the dust cover 5 and the folding mirror 4 so as to suppress reflection is also conceivable, but even this method cannot completely suppress reflection.

  In view of the above, an object of the present invention is to provide a HUD that can prevent outside light from being reflected on the HUD and entering the eyes of the driver without providing a dedicated wall.

  In order to achieve the above object, in the invention according to claim 1, the shutter (1a) is light-shielding and prevents dust from entering from the opening when the combiner (3) is in an upright state. And the dustproof cover (5) which has the translucent part (5a) which 1st light (6, 6b) permeate | transmits is provided.

  And the translucent part (5a) passes the position (7a) of a driver | operator's eye in the state which the combiner (3) stood up, and 2nd light reflected by a combiner (3) and a translucent part (5a). Of the optical paths (73a, 73b, 73c) of (73), the surface of the light transmitting part (5a) is inclined with respect to the optical path (73b) between the combiner (3) and the light transmitting part (3a). ing.

  The shutter (1a) is on the optical path (73a, 73b, 73c) of the second light (73) and the optical path of the first light (6) projected from the display (2) ( 6a, 6b, 6c) It is characterized by being located outside.

  Thereby, it is possible to prevent external light reflected by the dust cover from entering the eyes of the driver.

  In the present invention, the shutter (1a, 1b) is used to prevent the external light reflected by the dustproof cover from entering the eyes of the driver. There is no need to provide a dedicated wall to prevent entry. As a result, the head-up display can be reduced in size compared with the case where a dedicated wall is provided.

  In the invention according to claim 2, when the combiner (3) is in a standing state, it prevents dust from entering from the opening and transmits the first light (6, 6b) (5a). ) And a dust-proof cover (5) having a non-translucent portion (5b) that does not transmit light, and the combiner (3) in a standing state, the first light (6) is reflected and the combiner (3) And a reflecting mirror (4) that is incident on the light source.

  Then, when the combiner (3) is standing, it passes through the position (7a) of the driver's eyes and is reflected on the optical path (74a) of the third light (74) reflected by the windshield and the reflecting mirror (4). The light-impermeable portion (5b) is positioned outside the optical path (6a, 6b, 6c) of the first light (6) projected from the display (2). It is said.

  As a result, it is possible to prevent external light reflected by the reflecting mirror from entering the driver's eyes through reflection on the windshield.

  In the present invention, when the head-up display includes a dustproof cover, the dustproof cover is used to prevent outside light reflected by the reflecting mirror from entering the eyes of the driver. There is no need to provide a dedicated wall to prevent light from entering the driver's eyes. As a result, the head-up display can be reduced in size compared with the case where a dedicated wall is provided.

  With regard to the invention described in claims 1 and 2, for example, as shown in claim 3, the dust cover (5) can be formed in a mountain shape. That is, the shape of the cross section of the dustproof cover when the driver cuts the combiner (3) in the direction in which the driver sees the combiner (3) is a mountain shape with the translucent part (5a) and the opaque part (5b) as slopes. Can do.

In the invention according to claim 4, in the state in which the combiner (3) is housed, the dustproof cover (5) is placed on the optical path (6a) of the first light (6) in the state where the combiner (3) is raised. ) Positioned above and stored below the plate portion (1c), and in a state where the combiner (3) is raised, only the light transmitting portion (5a) is the optical path (6b) of the first light (6). It is characterized in that it is provided with moving means (51, 52, 53, 54, 55) that are located above and move the dustproof cover (5) to the upper side of the plate part (1c).

  As shown in claim 3, when the dustproof cover has a mountain shape and the dustproof cover is fixed to the plate portion, the entire HUD becomes large. Therefore, as shown in claim 4, when not in use, the dust cover is placed on the optical path (6a) of the first light (6) and stored.

  Thereby, HUD can be reduced in size and the mounting property to a vehicle can be improved.

  In the invention according to claim 5, the shutter (1b) is light-shielding, and the HUD reflects the first light (6) when the combiner (3) is upright, and A reflecting mirror (4) that is incident on 3) is provided.

  In the state where the combiner (3) stands up, it passes through the position (7a) of the driver's eyes and is on the optical path (74a) of the fourth light (74) reflected by the windshield and the reflecting mirror (4). The shutter (1b) is located outside the optical path (6a, 6b, 6c) of the first light (6) projected from the display (2).

  As a result, it is possible to prevent external light reflected by the reflecting mirror from entering the driver's eyes through reflection on the windshield.

  In the present invention, the shutter is used to prevent outside light reflected by the reflecting mirror from entering the driver's eyes, so that outside light reflected by the reflecting mirror is prevented from entering the eyes of the driver. There is no need to provide a dedicated wall for this purpose. As a result, the head-up display can be reduced in size compared with the case where a dedicated wall is provided.

  With regard to the invention according to claim 5, the movement of the shutter (1a, 1b) is when the position on the optical path of the fourth light and outside the optical path of the first light does not interfere with the standing of the combiner. If so, the shutter can be simply opened from the closed state.

  On the other hand, if the position interferes with the standing of the combiner, as shown in claim 6, the shutter (1a, 1b) opens from the closed state to a position where the combiner (3) can stand up, and the combiner ( After 3) stands up, it can be returned to a position on the optical path of the fourth light and outside the optical path of the first light.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
1 to 5 show the configuration of the HUD in the first embodiment of the present invention. FIG. 1 is a side view of the HUD when not in use, FIG. 5 is a side view of the HUD when in use, and FIGS. 2 to 4 are side views of the HUD at each stage from nonuse to use. FIG.

  The HUD of the present embodiment is a so-called pop-up type HUD, and is installed, for example, so as to be embedded in a recess provided on the upper surface of the instrument panel. In each figure, the right side is the driver side, and the left side is the front side of the vehicle.

  As shown in each drawing, the HUD includes a case 1, shutters 1 a and 1 b, a display 2, a combiner 3 other than the windshield, a folding mirror 4, and a dust cover 5.

  The case 1 is a rectangular parallelepiped box having an upper surface 1c as a plate portion, and as shown in FIG. 1, accommodates the display 2, the combiner 3, the folding mirror 4, and the dustproof cover 5 when the HUD is not used. is there. The upper surface 1c has an opening. Moreover, the case 1 is arrange | positioned so that the upper surface of the case 1 and the upper surface of an instrument panel may correspond, for example.

  The shutters 1a and 1b are provided on the upper surface 1c of the case 1. As shown in FIG. 1, the shutters 1a and 1b are closed so as to close the opening of the case 1 when not in use, and as shown in FIG. It is opened by a movable mechanism (not shown). The shutters 1a and 1b are light-shielding.

  The display 2 projects light (video) 6 when the HUD is used. For example, a liquid crystal display is used. As shown in FIG. 1, the display 2 is installed on the bottom surface of the case 1 and is fixed by mounting pins 2 a and the like. The attachment pin 2 a is inserted into a hole 1 c provided in the case 1, and holes 1 c are provided at a plurality of positions of the case 1.

  Thereby, the fixed position of the indicator 2 can be changed so that the optical path length from the indicator 2 to the combiner 3 can be changed. The variable direction of the fixed position is a direction parallel to the optical axis of light projected from the display 2 (light 6a in FIG. 5 described later).

  The combiner 3 is located closer to the driver than the windshield, and displays a virtual image when the light projected from the display device 2 is incident thereon. The combiner 3 includes a display unit 3a that displays an image and a support unit 3b that supports the display unit 3a. The display unit 3a is a half mirror (concave mirror). The display unit 3a and the support unit 3b are integrally formed of a transparent resin. As the combiner 3, a display unit 3a and a support unit 3b that are integrally formed from the beginning, or a display unit 3a and a support unit 3b that are formed separately can be used.

  As shown in FIG. 1, the combiner 3 is positioned below the upper surface 1c of the case 1 when not in use, and is stored in the case 1 in a collapsed state. At this time, the display surface of the display unit 3a is substantially horizontal. Further, as shown in FIG. 5, the combiner 3 is raised from a fallen state by a movable mechanism (not shown), which will be described later, during use.

  The folding mirror 4 is for folding the optical path, and is installed on the bottom surface of the case 1. In the present embodiment, as shown in FIG. 5, the light (image) projected from the display device 2 in the horizontal direction (the left-right direction in the figure) is reflected by the folding mirror 4 so as to be reflected upward. Is made incident on the combiner 3. The folding mirror 4 can be moved back and forth (left and right in the figure) by a movable mechanism (not shown) described later.

  As shown in FIG. 5, the dust cover 5 prevents dust and dirt from entering the case 1 from the opening when the combiner 3 is raised. When not in use, the dust cover 5 is housed inside the case 1 as shown in FIG. As shown in FIG. 5, the storage position is in the optical path where light (video) from the display device 2 is reflected by the folding mirror 4 and the combiner 3 and reaches the position of the driver's eyes when in use. On the other hand, at the time of use, as shown in FIG. 5, it is located above the upper surface 1c of the case 1 by a movable mechanism (not shown) to be described later.

  Further, as shown in FIG. 5, the dust cover 5 includes a surface 5 a through which the light 6 b from the display 2 is transmitted, a surface 5 b that is not transmitted (not located in the optical path of the light 6 b), and a triangular side surface 5 c. have. The surface 5a through which light from the display 2 is transmitted is transparent, and the non-transmitted surface 5b is opaque. The transparent surface 5a and the opaque surface 5b correspond to the translucent part and the non-translucent part of the present invention.

  These surfaces 5a and 5b are formed by, for example, being integrally formed with a previously transparent material such as acrylic, and the surface 5b that does not transmit light from the display 2 is painted black.

  Further, as shown in FIG. 5, when the HUD is used, the dust cover 5 has a transparent surface 5a, an opaque surface 5b, and a cross-sectional shape when the driver cuts the combiner 3 in the direction of viewing. Therefore, it has a mountain shape. The transparent surface 5a is such that the light reflected by the display unit 3a when the light (second light) is irradiated from the driver's eye position 7a toward the display unit 3a of the combiner 3 is transparent. It is inclined with respect to the horizontal direction so as to be reflected by the surface 5a and proceed in the forward direction of the vehicle. In other words, the transparent surface 5a is inclined with respect to the light (optical axis) reflected from the combiner 3 from the driver's eye position 7a and incident on the transparent surface 5a.

  Moreover, although not shown in figure, HUD has a control part for controlling each above-mentioned movable mechanism part. The HUD operates as follows by controlling each movable mechanism by the control unit.

First, as shown in FIG. 2, the shutters 1a and 1b are opened. Thereby, an opening for raising the combiner 3 and the dust cover 5 is formed on the upper surface of the case 1. At this time, the shutter 1a is raised and held at a predetermined position, which will be described later. Thereafter, as shown in FIG. 3, the combiner 3 rises from the opening and reaches a desired angle. This desired angle is an angle at which the driver can visually recognize a virtual image displayed on the combiner 3.

  Subsequently, as shown in FIG. 4, the combiner 3 rises. This rising direction is on the optical axis of light incident on the combiner 3 (light 6b from the display 2 reflected by the folding mirror 4 described later) when using the HUD, that is, in a direction parallel to the optical axis direction. is there. Moreover, the height which raises is preset for every vehicle model so that the position of the display part 3a may become a position where the visibility of a display image is good. Although not shown, in order to set the optical path length from the display 2 to the combiner 3 to a predetermined size, the fixed position of the display 2 is set according to the rising height.

  Thereafter, as shown in FIG. 5, the dust cover 5 rises from the opening to a predetermined position described later. In this way, the HUD is in use.

  When the HUD is used, light (image) 6a is projected from the display 2 toward the front of the vehicle (left direction in the figure). Then, the light 6 a is reflected upward by the folding mirror 4, and the reflected light 6 b is incident on the display unit 3 a of the combiner 3. The reflected light 6c reflected by the display unit 3a enters the eyes of the driver.

  Thereby, the driver can visually recognize the display of various information projected from the display unit 2 on the extension line in the traveling direction of the reflected light 6c on the display unit 3a of the combiner 3 so as to overlap the scenery in front. it can. The traveling direction (optical axis) of the light 6a, 6b, 6c described above is determined by the center 7a of the eye range 7, the display center of the display 2, the combiner 3, and the folding mirror 4. . The eye range 7 is a range in which a general driver's eyes are located, and the center 7a of the eye range corresponds to a standard driver's eye height. The eye range is determined by the height of the vehicle seat.

  Further, in the case where the driver's eye height is lower or higher than the standard, the broken line in FIG. As shown, the folding mirror 4 moves in parallel.

  Next, the predetermined position of the shutter 1a in the state of FIG. 2 described above and the predetermined position of the dust cover 5 in the state of FIG. 5 will be described.

  In FIG. 6, if the shutter 1 a is not present, the external light 73 as the second light is reflected by the transparent surface 5 a of the dust-proof cover 5 and enters the eyes of the driver. 73b and 73c.

  In the present embodiment, when the HUD is used, the transparent surface 5a of the dust cover 5 is inclined. For this reason, when external light 73a is incident on the transparent surface 5a from the front side of the case 1 at a small angle with the horizontal direction, it is reflected by the transparent surface 5a, and the reflected light 73b is displayed on the combiner 3 The light is reflected by the portion 3a, and the reflected light 73c enters the driver's eyes 7a.

  Therefore, the shutter 1a is a surface on which the above-mentioned external light 73 is transparent so as to cut off the incident of the above-mentioned external light 73 on the transparent surface 5a in the step of FIG. 2 (the step of opening the shutters 1a, 1b). It is held on an optical path 73a incident on 5a. At this time, the shutter 1a is positioned outside the optical path of the light 6b of the display 2 reflected by the folding mirror 4.

  In FIG. 7, if the dustproof cover 5 is not present, the external light 74 as the third light is reflected by the folding mirror 4 and enters the eyes of the driver, and the optical paths 74 a, 74 b, and 74 c of the external light 74. Indicates.

  When the dustproof cover 5 is not provided, when the HUD is used, the external light 74a is incident on the folding mirror 4, and the external light 74b reflected by the folding mirror 4 is further reflected by a windshield (not shown), and the reflected light 74c enters the eyes of the driver.

  Therefore, in the dustproof cover 5, the opaque surface 5 b has the above-described outer surface so as to cut off the incident of the external light 74 on the folding mirror 4 at the stage of FIG. 5 (the stage of raising the dustproof cover 5). The light 74 is held on an optical path 74 a that enters the folding mirror 4. At this time, the transparent surface 5 a of the dustproof cover 5 is positioned on the optical path of the light 6 b of the display 2 reflected by the folding mirror 4.

  Next, the structure of each movable mechanism that enables the above-described operation will be described. FIG. 8 shows a side view of the movable mechanism portion of the combiner 3. As described above, the operation of the combiner 3 includes “a first operation in which the combiner 3 rises and reaches a desired angle” and “a second operation in which the combiner 3 rising at a desired angle rises”. is there.

  First, the first mechanism unit for realizing the first operation will be described. This 1st mechanism part is equivalent to the rotation means of this invention. As shown in FIG. 8, the first mechanism portion includes a housing 11, a motor 12, a reduction gear 13, a rotation center shaft 14, and a combiner side gear 15.

  The housing 11 has a motor 12, a reduction gear 13, and a rotation center shaft 14 mounted on the inside thereof. The motor 12 is for rotating the combiner 3. The housing 11 is made of resin, metal, or the like.

  The reduction gear 13 is for reducing the rotation of the motor 12. In the present embodiment, two reduction gears 13 are used, but the number of reduction gears 13 may be other numbers.

  The rotation center shaft 14 is provided on the support portion 3 b of the combiner 3, and is a shaft that becomes the center when the combiner 3 is rotated. The combiner-side gear 15 transmits power from the reduction gear 13 to the combiner 3 and is integrated with the support portion 3 b of the combiner 3. The combiner-side gear 15 may be one in which the combiner-side gear 15 and the support portion 3b are integrally formed from the beginning, or one formed separately from the support portion 3b and bonded to the support portion 3b. it can.

  In addition, a stop portion 16 and a limit switch 17 are provided in the housing 11 to stop the rotation of the combiner 3 when the combiner 3 rises.

  In the first mechanism portion having such a configuration, when the motor 12 rotates, the power is transmitted to the combiner 3 via the reduction gear 13 and the combiner side gear 15. Thereby, the combiner 3 can be rotated about the rotation center axis | shaft 14, and the combiner 3 can be raised to the desired angle from the fall state.

  Next, the 2nd mechanism part for implement | achieving 2nd operation | movement is demonstrated. The second mechanism portion includes a housing 11, a motor 21, a reduction gear 22, a feed screw 23, a guide guide 24, and a guide pin 25.

  The motor 21 is a power source for raising the entire housing 11. The reduction gear 22 is for reducing the rotation of the motor 21. The feed screw 23 directly raises the entire housing 11.

  The guide guide 24 determines the upward direction of the housing 11 and is provided inside the case 1. The guide guide 24 is linear and extends in a direction parallel to the optical axis of the light 6b incident on the combiner 3 when the HUD is used. The guide pin 25 is provided on the housing 11 and is a pin for moving the housing 11 along the guide guide 24.

  In the second mechanism having such a configuration, when the motor 21 rotates, the power is transmitted to the reduction gear 22 and the feed screw 23 rotates. As a result, the entire housing 11 moves along the guide guide 24 in conjunction with the operation of the feed screw 23, and stops at a desired position by a limit switch (not shown).

  Thereby, the combiner 3 mounted on the housing 11 can be moved in a direction parallel to the optical axis of the light 6 b incident on the combiner 3.

  FIG. 9 shows a side view of the movable mechanism portion of the shutters 1 a and 1 b and the movable mechanism portion of the dust cover 5. First, the movable mechanism part of the shutter 1a will be described. This movable mechanism section includes a motor 31 as a movable power source for the shutter 1a, a reduction gear 32, a gear 33 on the shutter 1a side, and a rotating shaft 34 that serves as an axis for rotating the shutter 1a. .

  The motor 31, the reduction gear 32, and the rotating shaft 34 are mounted inside the case 1. The gear 33 on the shutter 1a side is located at the end of the support portion 35 of the shutter 1a on the side away from the shutter 1a, and is integral with the shutter 1a. The rotating shaft 34 is provided on the support portion 35.

  In the movable mechanism portion of the shutter 1a configured as described above, when the motor 31 rotates, the power is transmitted to the reduction gear 32 and the gear 33 on the shutter 1a side. Thus, the shutter 1a is opened by rotating the shutter 1a counterclockwise around the rotation shaft 34. At this time, when the shutter 1a reaches a predetermined position, the limit switch 36 stops the movement of the shutter 1a.

  Next, the movable mechanism part of the shutter 1b will be described. The movable mechanism section includes a motor 41 as a movable power source for the shutter 1b, a reduction gear 42, a gear 43 on the shutter 1b side, and a rotation shaft 44 that serves as an axis for rotating the shutter 1b. .

  The motor 41, the reduction gear 42, and the rotation shaft 44 are mounted inside the case 1. The gear 43 on the shutter 1b side is located at the end of the shutter 1b and is integral with the shutter 1b. The rotating shaft 44 is provided in the vicinity of the end of the shutter 1b.

  With such a configuration, the shutter 1b is opened by rotating clockwise around the rotation shaft 44. By controlling a limit switch and a rotation counter (not shown), the shutter 1b can be opened at a predetermined position. It comes to stop.

  Next, the movable mechanism part of the dust cover 5 will be described.

  The motor 51, the reduction gear 52, and the rotating shaft 54 are mounted inside the case 1. The gear 53 on the dust cover 5 side is located at the end of the transparent surface 5 a of the dust cover 5 and is integral with the dust cover 5. The rotating shaft 54 is also provided at the end of the transparent surface 5a. Further, a limit switch (not shown) is provided inside the case 1, and the dust cover 5 is provided with a protrusion 55 so as to come into contact with the limit switch when the dust cover 5 reaches a predetermined position. Yes.

  With such a configuration, when the motor 51 rotates, power is transmitted to the reduction gear 52 and the gear 53 on the dust cover 5 side, and the dust cover 5 rotates about the rotation shaft 54 and stops when it reaches a predetermined position. To do. Thereby, when not in use, the dustproof cover 5 housed in the case 1 rises to a desired position when in use.

  In FIG. 10, the side view of the movable mechanism part of the folding mirror 4 is shown. The movable mechanism portion of the folding mirror 4 includes a housing 61, a feed screw 62, a motor 63 for operating the folding mirror 4, a reduction gear 64, a guide guide 65, and a guide pin 66. .

  The feed screw 62, the motor 63 for operating the folding mirror 4, the reduction gear 64, and the guide guide 65 are mounted inside the case 1.

  The housing 61 is for holding the folding mirror 4. The feed screw 62 and the guide guide 65 are for causing the folding mirror 4 and the housing 61 to move linearly. The feed screw 62 and the guide guide 65 are parallel to the direction in which the distance between the folding mirror 4 and the display 2 is shortened or lengthened (the direction from the folding mirror 4 toward the display 2). The guide pin 66 is provided on the housing 61 and is a pin for moving the housing 61 along the guide guide 65.

  With this configuration, when the motor 63 rotates, the reduction gear 64 is transmitted and the feed screw 62 rotates. As a result, the folding mirror 4 moves in parallel with the housing 61 in the left-right direction in the figure.

  As described above, in the present embodiment, the HUD includes the case 1, the shutters 1a and 1b, the movable mechanisms 31 to 36 and 41 to 44 for moving the shutters 1a and 1b, the display 2, The combiner 3, first and second mechanism parts 11 to 17, 21 to 25 for moving the combiner 3, the folding mirror 4, the dustproof cover 5, and the movable mechanism part 51 for moving the dustproof cover 5. To 55.

  The dust-proof cover 5 has a transparent surface 5a and an opaque surface 5b, and the cross-section of the dust-proof cover 5 has a mountain shape with the transparent surface 5a and the opaque surface 5b as slopes.

  (1) When the HUD is not used, the combiner 3 and the dust cover 5 are housed inside the case 1. At this time, the dust cover 5 is positioned on the optical path 6a where the light (image) from the display device 2 is reflected by the folding mirror 4 and the combiner 3 and reaches the position of the driver's eyes when in use.

  On the other hand, when the HUD is used, after each of the movable mechanisms opens the shutters 1a and 1b, the combiner 3 rises and rises, and then the dust cover 5 rises and is held at a predetermined position. The predetermined position is a position where the transparent surface 5a of the dust cover 5 is on the optical path of the light 6b projected from the display device 2.

  When the dustproof cover 5 is shaped like a mountain and fixed to the case 1, the case 1 becomes large. However, as in this embodiment, the light 6a projected from the display unit 2 when not in use. By storing on the road, the case 1 can be reduced in size, and the mounting property to a vehicle can be improved.

  (2) The predetermined position where the dust cover 5 is held is also a position where the transparent surface 5a of the dust cover 5 is inclined. For this reason, if the shutter 1a does not exist, when the external light 73a is incident on the transparent surface 5a at a small angle with the horizontal direction from the front side of the case 1, it is reflected by the transparent surface 5a, The reflected light 73b is reflected by the display unit 3a of the combiner 3, and the reflected light 73c enters the driver's eyes 7a.

  Therefore, in this embodiment, when the shutter 1a is opened, the above-described external light 73 is incident on the transparent surface 5a so as to cut off the external light 73 incident on the transparent surface 5a. To keep in.

  Thereby, it is possible to prevent external light reflected by the dust cover 5 from entering the eyes of the driver.

  In this way, when the HUD is used, the transparent surface 5a of the dust cover 5 is held obliquely and the shutter 1a is held at the above-described position, so that it is not necessary to use a separate part. Thereby, compared with the case where another component is used, a number of parts can be reduced and HUD can be reduced in size. As a result, the mountability of the HUD on the vehicle can be improved.

  (3) The predetermined position where the dust cover 5 is held is also a position where the external light reflected by the folding mirror 4 does not enter the eyes of the driver. That is, if the dustproof cover 5 is not provided, the external light 74a is incident on the folding mirror 4 and the external light 74b reflected by the folding mirror 4 is further reflected by a windshield (not shown), and the reflected light 74c is reflected. It gets into the eyes of the driver.

  Therefore, in the present embodiment, the opaque surface 5b is held on the optical path 74a where the external light 74 enters the folding mirror 4 so as to cut the above-described external light 74 from entering the folding mirror 4. It has become so.

  Thereby, it is possible to prevent the external light reflected by the folding mirror 4 from entering the driver's eyes 7a through the reflection on the windshield.

  Further, in the present embodiment, the dustproof cover 5 is used to prevent the external light reflected by the folding mirror 4 from entering the driver's eyes, so the external light reflected by the folding mirror 4 is the driver's eyes. There is no need to provide a separate part to prevent entry. Thereby, compared with the case where another component is provided, a number of parts can be reduced and HUD can be reduced in size. As a result, the mountability of the HUD on the vehicle can be improved.

(Second Embodiment)
In the first embodiment, the case where the HUD has the dustproof cover 5 has been described as an example, but a structure without the dustproof cover 5 may be used. 11, 12, and 13 are cross-sectional views of the HUD in the present embodiment. The HUD shown in FIGS. 11 to 13 is the same as the HUD shown in FIGS. 1 to 5 except that the dustproof cover 5 is omitted.

  When not in use, as shown in FIG. 11, the combiner 3 is housed inside the case 1 as in the first embodiment.

  At the time of use, as shown in FIG. 12, first, as in the first embodiment, after the shutters 1a and 1b are opened, the combiner 3 is raised, and the combiner 3 is raised as shown in FIG. At this time, the shutter 1b opens to a position where it does not get in the way when the combiner 3 gets up.

  Subsequently, in the present embodiment, after the combiner 3 is lifted, as shown in FIG. 13, the shutter 1b returns slightly from the opened state and stops at a predetermined position.

  Here, the predetermined position will be described. In FIG. 14, if the shutter 1b is not present, the external light 74 as the fourth light is reflected by the folding mirror 4 and enters the eyes of the driver. The optical paths 74a, 74b, and 74c of the external light 74 are shown in FIG. Show.

  If the shutter 1b is not present, the external light 74a is incident on the folding mirror 4 and the external light 74b reflected by the folding mirror 4 is further reflected by a windshield (not shown) and reflected light 74c as in FIG. Gets into the eyes of the driver.

  Therefore, in the present embodiment, when the HUD is used, a shutter is placed on the optical path 74a on which the external light 74 is incident on the folding mirror 4 so as to cut off the external light 74 that is incident on the folding mirror 4. 1b is held. At this time, the shutter 1b is located outside the optical path of the light 6a, 6b, 6c of the display 2.

  Thus, when the dustproof cover 5 is not installed, the external light reflected by the folding mirror 4 is reflected on the windshield by holding the shutter 1b at the above-described predetermined position when using the HUD. As a result, it can be prevented from entering the driver's eyes.

  In this embodiment, the shutter 1b is used to prevent external light reflected by the folding mirror 4 from entering the eyes of the driver. Thereby, in order to prevent the external light reflected by the folding mirror 4 from entering the eyes of the driver, it is not necessary to provide a separate part. As a result, also in this embodiment, the head-up display can be downsized as compared with the case where another component is provided.

  Regarding the movement of the shutter 1b, in this embodiment, the shutter 1b is once opened to a position where it does not get in the way when the combiner 3 stands up, and after the combiner 3 is lifted, the shutter 1b is returned. As explained.

  However, even if the shutter 1b is in the predetermined position described above, if it does not interfere with the standing of the combiner 3, the shutter 1b is opened from the closed state to the predetermined position in one operation. You can also

(Other embodiments)
(1) In each of the above-described embodiments, the case where the shutter 1a is provided has been described as an example. However, the shutter 1a is omitted from the viewpoint of preventing external light reflected by the folding mirror 4 from entering the eyes of the driver. You can also.

  In this case, as a means for preventing external light reflected by the dust cover 5 from entering the eyes of the driver, a dedicated separate component can be positioned at the position of the shutter 1a when the HUD is used.

  (2) In each of the above-described embodiments, the case where each component is held inside the case 1 has been described as an example. Instead of using the case 1, each component is held on the upper surface 1c as a plate portion. You can also.

It is a side view of the head up display at the time of non-use in a 1st embodiment of the present invention.

FIG. 2 is a side view of a stage before the head-up display of FIG. 1 enters a use state. FIG. 2 is a side view of a stage before the head-up display of FIG. 1 enters a use state. FIG. 2 is a side view of a stage before the head-up display of FIG. 1 enters a use state. It is a side view when the head-up display of FIG. 1 will be in use. In the head-up display of FIG. 5, if the shutter 1 a is not present, the external light 73 is reflected by the transparent surface 5 a of the dust cover 5 and enters the eyes of the driver. , 73c. In the head-up display of FIG. 5, when the dust-proof cover 5 is not present, the external light 74 is reflected by the folding mirror 4 and enters the driver's eyes, showing the optical paths 74a, 74b, and 74c of the external light 74. FIG. It is a side view of the movable mechanism part of the combiner. 2 is a side view of a movable mechanism portion of shutters 1a and 1b and a movable mechanism portion of a dust cover 5. FIG. It is a side view of the movable mechanism part of the folding mirror. It is a side view of the head up display at the time of non-use in a 2nd embodiment of the present invention. FIG. 10 is a side view of a stage before the head-up display of FIG. 9 enters a use state. FIG. 10 is a side view when the head-up display in FIG. 9 is in use. In the head-up display of FIG. 13, a diagram showing optical paths 74 a, 74 b and 74 c of the external light 74 when the external light 74 is reflected by the folding mirror 4 and enters the driver's eyes if the shutter 1 b is not present. It is. It is a side view of the head up display of the structure which this inventor examined.

Explanation of symbols

1 ... case, 2 ... display,
3 ... Combiner, 3a ... Display part, 3b ... Support part,
4 ... folding mirror, 5 ... dust cover,
6a, 6b, 6c ... optical axis,
11, 61 ... housing,
12, 21, 31, 41, 51, 63 ... motor,
13, 22, 32, 42, 52, 64 ... reduction gear,
14, 34, 44, 54 ... rotation center axis,
15 ... Combiner side gear,
23, 62 ... lead screw,
24, 65 ... Guide guide,
25, 66 ... guide pins,
33 ... the gear on the shutter 1a side,
43 ... the gear on the shutter 1b side,
53 ... Gear on the dust cover 5 side
73, 74: External light (second, third, fourth light).

Claims (6)

A display (2) for projecting the first light;
A combiner (3) for displaying a virtual image by being arranged closer to the driver than the windshield of the vehicle and receiving the first light (6);
A plate (1c) disposed above the indicator (2) and having an opening;
A shutter (1a) for opening and closing the opening;
In a state where the shutter (1a, 1b) is opened, the combiner (3) is in an upright state so as to protrude above the plate portion (1c) from the opening, and the shutter (1a In the closed state, the combiner (3) is rotated so that the combiner (3) is rotated so that the combiner (3) is housed below the plate portion (1c) in a collapsed state. 13, 14, 15, 16, 17)
The shutter (1a) is light-shielding,
When the combiner (3) is in an upright state, a dust cover (5a) that prevents dust from entering through the opening and transmits the first light (6, 6b) ( 5)
In the state where the combiner (3) stands up, the translucent part (5a) passes through the position (7a) of the driver's eyes and is reflected by the combiner (3) and the translucent part (5a). Among the light paths (73a), 73b, 73c of the light (73), the light path (73b) between the combiner (3) and the light transmission part (3a) The surface is slanted,
The shutter (1a) is on the optical path (73a, 73b, 73c) of the second light (73) and the first light (6) projected from the display (2). A head-up display that is located outside the optical path (6a, 6b, 6c). A display (2) for projecting the first light;
A combiner (3) for displaying a virtual image by being arranged closer to the driver than the windshield of the vehicle and receiving the first light (6);
A plate (1c) disposed above the indicator (2) and having an opening;
When the combiner (3) is standing upright, the combiner (3) protrudes upward from the plate (1c) from the opening, or when the combiner (3) is tilted, the lower side of the plate (1c) In a head-up display comprising rotating means (12, 13, 14, 15, 16, 17) for rotating the combiner (3) so as to be housed in
When the combiner (3) is in a standing state, dust is prevented from entering through the opening, and the first light (6, 6b) is transmitted and the light is not transmitted. A dust cover (5) having an opaque portion (5b);
A reflective mirror (4) that reflects the first light (6) and makes it incident on the combiner (3) when the combiner (3) is in an upright state;
When the combiner (3) is standing, the optical path (74a) of the third light (74) that passes through the driver's eye position (7a) and is reflected by the windshield and the reflecting mirror (4). The opaque portion (5b) is located outside the optical path (6a, 6b, 6c) of the first light (6) projected from the display (2). Head-up display, characterized by The dustproof cover (5) has a cross-sectional shape when the driver cuts the combiner (3) in a direction in which the driver visually recognizes the light-transmitting part (5a) and the light-impermeable part (5b). The head-up display according to claim 1, wherein the head-up display has a mountain shape. In the state where the combiner (3) is housed, the dust cover (5) is positioned on the optical path (6a) of the first light (6) when the combiner (3) is upright. When the combiner (3) is stood up below the plate part (1c), only the light transmitting part (5a) is on the optical path (6b) of the first light (6). 4. A moving means (51, 52, 53, 54, 55) for moving the dustproof cover (5) above the plate portion (1c), wherein the dustproof cover (5) is moved upward. The head-up display according to any one of the above. A display (2) for projecting the first light;
A combiner (3) for displaying a virtual image by being arranged closer to the driver than the windshield of the vehicle and receiving the first light (6);
A plate (1c) disposed above the indicator (2) and having an opening;
A shutter (1b) for opening and closing the opening;
In a state where the shutter (1b) is opened, the combiner (3) protrudes from the opening to the upper side of the plate portion (1c) in a standing state, and the shutter (1b) is closed. In the state, turning means (12, 13, 14, 15 for turning the combiner (3) so that the combiner (3) is housed under the plate part (1c) in a collapsed state. , 16, 17) comprising:
The shutter (1b) is light-shielding.
A reflector (4) for reflecting the first light (6) and making it incident on the combiner (3) when the combiner (3) is standing;
In the state where the combiner (3) stands, on the optical path (74a) of the fourth light (74) that passes through the position (7a) of the driver's eyes and is reflected by the windshield and the reflecting mirror (4). The shutter (1b) is positioned outside the optical path (6a, 6b, 6c) of the first light (6) projected from the display (2). Head up display. The shutter (1b) opens from a closed state to a position where the combiner (3) can stand up, and after the combiner (3) stands up, on the optical path of the fourth light, 6. The head-up display according to claim 5, wherein the head-up display returns to a position outside the optical path of light.

Images