JP5954047B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device.

  A vehicle display device called a head-up display is known. The head-up display transmits information that enters from outside the vehicle and displays information by superimposing it on the scenery outside the vehicle using an optical element called a combiner that reflects the image projected from the optical unit arranged inside the vehicle. It is a display device. A head-up display has recently been attracting attention as a display device for vehicles because a driver who is viewing the scenery outside the vehicle can recognize information on the image projected from the optical unit with almost no change in line of sight or focus. Collecting.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses that a visible space is adjusted by using an X-axis stage, a Z-axis stage, and a rotary stage in a head-up display mounted on a dashboard of a vehicle.

Japanese Patent Laid-Open No. 10-278629

  Since the above-described head-up display is attached to the dashboard, it may be difficult to attach the head-up display to an appropriate position depending on the type of vehicle.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle display device that can be attached to an appropriate position even when the types of vehicles are different.

  The vehicle display device of the present invention includes an image generation unit that generates and projects video light from an image signal of an image to be displayed, a combiner that is attached to the image generation unit and that projects the image, and the image generation unit A plate-like mounting plate for attaching the vehicle to the vehicle, and a pair of gripping parts to which the mounting plate is connected and attached to the room mirror so as to hold the room mirror of the vehicle, The vehicular display device includes a contact portion that contacts the room mirror so as to define a positional relationship between the image generation unit and the room mirror.

  According to the vehicle display device of the present invention, the vehicle display device can be attached to an appropriate position even when the types of vehicles are different.

It is a perspective view shown with a field of view from the inside of vehicles about a head up display which is a display for vehicles of the present invention. It is a perspective view shown by the visual field from the windshield side about the head-up display of FIG. It is a figure which shows the internal structure of an optical unit with the path | route of light. It is a figure which shows the internal structure of an optical unit with the path | route of light. It is a figure shown about a part inside optical unit and a part inside board | substrate storage part. In FIG. 5, it is a figure shown about the mode at the time of removing a heat sink and a flexible cable. It is a side view of the head up display attached to the room mirror. It is a front view of the head up display attached to the room mirror. It is a figure shown about the visual recognition area of the image (virtual image) projected on a combiner. It is a figure shown about the visual recognition area of the image (virtual image) projected on a combiner. It is a figure which shows a mode when a projection part and a combiner are removed in the head-up display attached for right-hand drive vehicles. It is a figure which shows a mode when the board | substrate storage part is changed for left-hand drive vehicles. It is a figure which shows the head-up display changed for left-hand drive vehicles. It is a perspective view of the attachment member attached to the room mirror. It is a perspective view of an attachment member. It is a side view of the attachment member attached to the room mirror. It is a figure shown in detail about a mode that an attachment plate and a lower side grip part are attached to an upper side grip part. It is a figure shown in detail about a mode that a claw member is attached to a lower side grasping part. It is a figure which shows a mode when the image generation part of a head-up display is attached using a pair of long hole of the protrusion part of an attachment plate by the visual field from the lower side. It is a figure which shows a mode when the image generation part of a head-up display is attached using a pair of long hole of the protrusion part of an attachment plate by the visual field from the lower side. It is sectional drawing of the set screw part at the time of attaching so that the 1st attachment surface of a board | substrate storage part may contact an attachment plate. It is sectional drawing of the set screw part at the time of attaching so that the 2nd attachment surface of a board | substrate storage part may contact an attachment plate.

  Embodiments of the present invention will be described below with reference to the drawings. Specific numerical values and the like shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

[External Configuration of Display Device for Vehicle According to this Embodiment]
As a display device for a vehicle according to this embodiment, a head-up display that is used by being attached to a room mirror (rear mirror) provided in the vehicle is taken as an example, and an external configuration thereof is described with reference to FIGS. To do. FIG. 1 is a perspective view showing an aspect in which the head-up display 10 according to the present embodiment is observed from a field of view toward a windshield (not shown) of a vehicle from a room mirror 600 to which the head-up display 10 is attached. FIG. 2 is a perspective view showing an aspect in which the head-up display 10 is observed with a field of view from the windshield (not shown) toward the room mirror 600. In the following description, the directions indicated by front and rear, left and right, and up and down are the front and rear of the vehicle, the left and right directions of the vehicle, the direction perpendicular to the road surface on which the vehicle is disposed and the direction from the surface to the vehicle, and vice versa. Means direction.

  The head-up display 10 generates an image signal related to an image displayed as a virtual image on the combiner 400, and stores a circuit board 111 (see FIG. 5) that outputs the generated image signal to the optical unit 200. Part 100. The circuit board 111 receives an image signal output from an external device (not shown) such as a navigation device or a media playback device, performs a predetermined process on the input signal, and outputs the processed signal to the optical unit 200. You can also. The substrate storage unit 100 is connected to an attachment member 700 (see FIG. 14), which will be described later, which is one of the components of the head-up display 10, and the rear-view mirror 600 is held by the attachment member 700. 10 is attached to the room mirror 600. The details of each mechanism relating to the connection between the substrate storage unit 100 and the mounting member 700 and the holding of the rear mirror 600 of the mounting member 700 will be described later. Further, in order to facilitate explanation and understanding of the overall configuration of the head-up display 10, the mounting member 700 is not shown in FIGS.

  The head-up display 10 includes an optical unit 200 to which an image signal output from the circuit board 111 is input. The optical unit 200 includes an optical unit main body 210 and a projection unit 300. The optical unit main body 210 accommodates a light source 231, an image display element 240, and various optical lenses described later. The projection unit 300 houses various projection mirrors and an intermediate image screen 360 described later. The image signal output from the circuit board 111 is projected as image display light from the projection port 301 onto the combiner 400 having a concave shape through the devices of the optical unit main body 210 and the devices of the projection unit 300. In the present embodiment, a case where LCOS (Liquid crystal on silicon), which is a reflection type liquid crystal display panel, is used as the image display element 240 is illustrated, but a DMD (Digital Micromirror Device) may be used as the image display element 240. In that case, the optical system and the driving circuit according to the display element to be applied are used.

  A user who is a driver recognizes the projected image display light as a virtual image via the combiner 400. In FIG. 1, the projection unit 300 projects the image display light of the character “A” onto the combiner 400. By viewing the combiner 400, the user recognizes as if the letter “A” is displayed, for example, 1.7m to 2.0m ahead (front of the vehicle) from the user, that is, recognizes the virtual image 450. it can. Here, the central axis of the image display light projected from the projection unit 300 onto the combiner 400 is defined as a projection axis 320.

  Although details will be described later, the optical unit 200 is configured to be rotatable with respect to the substrate storage unit 100. Furthermore, in the head-up display 10 according to the present embodiment, the projection unit 300 and the combiner 400 have a configuration in which the mounting direction can be changed with respect to a predetermined surface of the optical unit main body 210 and can be detached.

[Internal Configuration of Display Device for Vehicle According to Present Embodiment: Optical System]
Next, the internal configuration of the head-up display 10 will be described. 3 and 4 are diagrams for describing the internal configuration of the optical unit 200 of the head-up display 10 described above. FIG. 3 is a diagram showing an internal configuration of the optical unit main body 210 and a part of the internal configuration of the projection unit 300 together with an optical path related to image display light. FIG. 4 is a diagram illustrating an internal configuration of the projection unit 300 and a part of the internal configuration of the optical unit main body 210 together with an optical path related to image display light projected to the combiner 400.

  First, an internal configuration of the optical unit main body 210 and an optical path related to image display light will be described with reference to FIG. The optical unit body 210 includes a light source 231, a collimating lens 232, a UV-IR (UltraViolet-Infrared Ray) cut filter 233, a polarizer 234, a fly-eye lens 235, a reflecting mirror 236, a field lens 237, a wire grid polarization beam splitter 238, A quarter-wave plate 239, an analyzer 241, a projection lens group 242, and a heat sink 243 are provided.

  The light source 231 includes a light emitting diode that emits light of three colors of white, blue, green, and red. A heat sink 243 is attached to the light source 231 for cooling the heat generated with light emission. The light emitted from the light source 231 is converted into parallel light by the collimating lens 232. The UV-IR cut filter 233 absorbs and removes ultraviolet light and infrared light from the parallel light that has passed through the collimating lens 232. The polarizer 234 changes the light that has passed through the UV-IR cut filter 233 into unpolarized P-polarized light. The fly-eye lens 235 uniformly adjusts the brightness of the light that has passed through the polarizer 234.

  The reflecting mirror 236 changes the optical path of light that has passed through each cell of the fly-eye lens 235 by 90 degrees. The light reflected by the reflecting mirror 236 is collected by the field lens 237. The light collected by the field lens 237 is irradiated to the image display element 240 via the wire grid polarization beam splitter 238 and the quarter wavelength plate 239 that transmit the P-polarized light.

  The image display element 240 includes red, green, and blue color filters for each pixel. The light emitted to the image display element 240 has a color corresponding to each pixel, is modulated by the liquid crystal composition included in the image display element 240, and becomes S-polarized image display light, which is applied to the wire grid polarization beam splitter 238. It is emitted toward. The emitted S-polarized light is reflected by the wire grid polarization beam splitter 238, changes the optical path, passes through the analyzer 241, and then enters the projection lens group 242.

  The image display light transmitted through the projection lens group 242 exits the optical unit main body 210 and enters the projection unit 300. And the 1st projection mirror 351 with which the projection part 300 is provided changes the optical path of the image display light which entered.

  Next, an internal configuration of the projection unit 300 and an optical path related to image display light will be described with reference to FIG. The projection unit 300 includes a first projection mirror 351, a second projection mirror 352, and an intermediate image screen 360.

  As described above, the optical path of the image display light that has passed through the wire grid polarization beam splitter 238, the analyzer 241, and the projection lens group 242 included in the optical unit main body 210 is combined by the first projection mirror 351 and the second projection mirror 352. The optical path to 400 is changed. Meanwhile, a real image based on the image display light reflected by the second projection mirror 352 is formed on the intermediate image screen 360. The image display light related to the real image formed on the intermediate image screen 360 passes through the intermediate image screen 360 and is projected onto the combiner 400. As described above, the user recognizes the virtual image related to the projected image display light forward via the combiner 400.

  With the internal configuration as described above, the user can visually recognize a virtual image based on the image signal output from the circuit board 111 while being superimposed on an actual landscape via the combiner 400.

[Internal Configuration of Display Device for Vehicle According to Present Embodiment: Details of Internal Configuration of Optical Unit 200]
The optical unit 200 is configured to be rotatable with respect to the substrate storage unit 100. Next, the internal configuration of the optical unit 200 and the substrate storage unit 100 will be described in detail with reference to FIG.

  FIG. 5 is a diagram illustrating a part of the inside of the optical unit 200 and a part of the inside of the substrate storage unit 100. In FIG. 5, the vicinity of the connection portion between the optical unit 200 and the substrate storage unit 100 is mainly shown. The optical system arrangement unit 245 included in the optical unit 200 accommodates various devices other than the heat sink 243 described above. In the optical unit 200, a heat sink 243 and a space 248 are provided in the vicinity of the connection portion of the optical system arrangement unit 245 with the substrate storage unit 100 on the substrate storage unit 100 side.

  The circuit board 111 electrically controls the image display element 240 and the light source 231 housed in the optical system arrangement unit 245. The circuit board 111 and the image display element 240 accommodated in the optical system arrangement unit 245 are connected by a flexible cable 246 that is a wiring. Here, the flexible cable 246 is an example, and a flexible board or other wiring for transmitting an electrical signal can be used. The optical unit 200 has an optical unit side opening 247 formed on one surface of the housing, and the substrate housing portion 100 has a substrate housing portion side opening 112 formed on one surface of the housing. The flexible cable 246 connects the circuit substrate 111 and the image display element 240 through the optical unit side opening 247 and the substrate storage unit side opening 112. The flexible cable 246 preferably has a length that allows the substrate storage unit 100 and the optical unit 200 to freely rotate.

  FIG. 6 is a diagram illustrating a state in which the heat sink 243 and the flexible cable 246 described above are removed from a part of the optical unit 200 in FIG. 5 and a part of the substrate storage unit 100.

  Each of the optical unit side opening 247 and the substrate storage unit side opening 112 is formed in a shape having two opposing sides that spread at a predetermined angle, for example, a substantially fan shape having a predetermined angle. As a result, when the optical unit 200 is rotated with respect to the substrate storage unit 100 as will be described later, the housing relating to the surface of the optical unit 200 on which the optical unit side opening 247 is provided, or the substrate storage unit 100. It is possible to reduce the force applied to the flexible cable 246 by the housing according to the surface on which the board housing portion side opening 112 is provided. Therefore, it is possible to prevent the flexible cable 246 from being damaged or cut by the respective housings as it rotates.

  Further, as described above, the space portion 248 is provided in the vicinity of the connection portion of the substrate storage portion 100 in the optical unit 200, and the flexible cable 246 is mainly stored in the space portion 248 in the optical unit 200. . By providing the space 248, the length of the flexible cable can be secured with a margin. Accordingly, the tension applied to the flexible cable 246 can be reduced when the optical unit 200 is rotated with respect to the substrate storage unit 100. Therefore, it is possible to prevent the flexible cable 246 from being damaged or cut by the tension accompanying the rotation.

  The optical unit 200 and the substrate storage unit 100 are connected to each other by a hinge 113 that is a rotation member that serves as a rotation axis of the rotation, and a rotation stop mechanism 114 that limits a rotation angle range. The optical unit 200 rotates with respect to the substrate storage unit 100 by a predetermined angle around the hinge 113. Here, although the hinge 113 is used in the present embodiment, other rotating members can be used.

  The substrate storage unit side opening 112 of the substrate storage unit 100 and the optical unit side opening 247 of the optical unit 200 are substantially fan-shaped as described above. When the substrate storage unit 100 rotates with respect to the optical unit 200, the opening for passing the flexible cable 246 formed by both the substrate storage unit side opening 112 and the optical unit side opening 247 is narrowed. However, the substrate housing side opening 112 and the optical unit side opening 247 are substantially fan-shaped, so that the flexible cable 246 is sufficiently passed through the angle range limited by the rotation stopping mechanism 114. The opening is maintained.

  Note that the shapes of the above-described substrate storage unit side opening 112 and optical unit side opening 247 are merely examples, and any shape may be used as long as the flexible cable 246 is not damaged by rotation. For example, only one of the substrate housing side opening 112 and the optical unit side opening 247 may be formed in a shape having two opposing sides that spread at a predetermined angle so that the load is not applied to the flexible cable 246.

  As described above, the head-up display 10 is configured such that the optical unit 200 and the substrate storage unit 100 can rotate around the hinge 113. The combiner 400 is provided in the optical unit 200, and the substrate storage unit 100 is attached to the room mirror 600 by an attachment member 700. As described above, the user can independently adjust the observation angle of the room mirror and the adjustment of the observation angle of the combiner 400. Therefore, the user can adjust the room mirror 600 to an angle at which the rear of the vehicle can be properly confirmed, and adjust the viewing angle of the combiner 400 to recognize an appropriate image (virtual image) without distortion.

  Further, by providing the optical unit 200 with the space 248 for storing the flexible cable 246 with a sufficient length, the optical unit 200 can freely rotate with respect to the substrate storage unit 100. Adjustment of each observation angle can be performed appropriately, and tension generated by rotation can be prevented from damaging or cutting the flexible cable 246.

  Furthermore, by making the substrate housing portion side opening 112 and the optical unit side opening portion 247 of the optical unit 200 into the above-mentioned substantially fan shape, the optical unit 200 and the substrate are rotated by the rotation of the optical unit 200 with respect to the substrate housing portion 100. Each casing outer wall of the storage unit 100 can be prevented from damaging or cutting the flexible cable 246, and the user can appropriately adjust each observation angle.

  As shown in FIG. 3, in this embodiment, the optical path of the image display light is bent twice in the 90 ° direction by using the reflecting mirror 236 and the wire grid polarization beam splitter 238. Then, the image display light is emitted to the projection unit 300 in a direction opposite to the light emission direction of the light source 231. Thus, by making the path of the image display light U-shaped, the flexible cable 246 can be wired so as not to be close to the light source 231 (see FIG. 5). Thereby, noise due to electromagnetic waves generated from the light source 231 can be prevented from being mixed into the image signal, and the flexible cable 246 can also be prevented from being damaged by heat generated by the light source 231. Furthermore, since the heat sink 243 installed in the vicinity of the light source 231 is also arranged away from the flexible cable 246, a space portion 248 for storing the flexible cable 246 can be provided.

[Angle adjustment using hinges]
Next, the rotation of the optical unit 200 with respect to the substrate storage unit 100 will be described in detail. FIG. 7 is a side view of the head-up display 10 attached to the room mirror 600. As shown in this figure, the room mirror 600 is normally directed toward the driver so that the driver can visually recognize the rear of the vehicle. That is, it is rare for the driver to drive with the mirror surface 602 of the room mirror 600 perpendicular to the vehicle bottom surface or the traveling road surface. Usually, the driver uses the mirror surface 602 of the room mirror 600 as the vehicle bottom surface or the like. The direction of the rearview mirror 600 is tilted so as to have an angle with respect to the vertical plane. For this reason, when the head-up display 10 is attached to the room mirror 600, the substrate storage unit 100 also has an angle with respect to a plane parallel to the vehicle bottom surface or the like as the room mirror 600 is tilted.

  The inventor of the present application conducted an experiment for recognizing a virtual image presented by the combiner 400 for many vehicles and various users. As a result, the longitudinal direction of the room mirror 600 and the longitudinal direction of the substrate storage unit 100 are the same direction. If the angle of the combiner 400 and the optical unit 200 is adjusted so that the user recognizes the virtual image without distortion when the head-up display 10 is installed, the mirror surface 602 and the optical unit main body 210 are often adjusted. It was confirmed by an experiment that the angle formed with the reference plane 212 of the lens was approximately 100 degrees.

  Here, the “reference plane” of the optical unit body 210 is an angle measurement reference plane used as a reference for measuring the inclination of the optical unit body 210 with respect to the mirror surface 602 of the rearview mirror 600. An example of the reference surface 212 is a plane including the optical axis of the optical unit main body 210 or a plane parallel thereto. Another example of the reference surface 212 is the first main body surface 221 that is the lower surface when the head-up display 10 is attached to the right handle, or the second main body surface that is the surface facing the first main body surface 221. 222 or a plane parallel to these surfaces. The “reference surface” of the optical unit main body 210 may be a reference surface of the optical unit 200.

  In view of the above experimental results, the head-up display 10 according to the embodiment has an attachment member made of the attachment plate 710 or the like so that the longitudinal direction of the room mirror 600 and the longitudinal direction of the substrate storage unit 100 are the same direction. When the head-up display 10 is attached to the rear-view mirror 600 using 700, an optimal image without distortion can be presented when the angle between the mirror surface 602 and the reference surface 212 becomes a predetermined reference angle. Has been. Specifically, the optical unit constituting the optical system of the head-up display 10 is designed so that an optimal video can be presented under the above-described conditions.

  Here, the “optical part constituting the optical system of the head-up display 10” is a system that generates and projects image display light based on an image signal output from the circuit board 111 housed in the board housing part 100. . More specifically, in the optical unit main body 210, a light source 231, a collimating lens 232, a UV-IR (UltraViolet-Infrared Ray) cut filter 233, a polarizer 234, a fly-eye lens 235, a reflecting mirror 236, a field lens 237, Wire grid polarization beam splitter 238, quarter-wave plate 239, analyzer 241, projection lens group 242, first projection mirror 351, second projection mirror 352, intermediate image screen 360, and combiner 400 in projection unit 300 Are all or a predetermined portion.

  The “predetermined reference angle” is an angle formed between the mirror surface 602 and the reference surface 212 and is an angle assumed as a design reference when the head-up display 10 is optically designed. The “predetermined reference angle” may be determined by experiments so that an optimal video without distortion can be presented to many vehicles and various users. An example of the predetermined reference angle is an obtuse angle, more specifically 100 degrees. The “predetermined reference angle” is indicated by using φ in FIG.

  As described above, since the head-up display 10 according to the embodiment is designed with an optical unit that forms an optical system based on the angle formed by the mirror surface 602 and the reference surface 212 being a predetermined reference angle, Thus, the optical design is optimally adapted to the inclination of the room mirror 600 assumed in the usage state. When the head-up display 10 according to many vehicles and various user embodiments is mounted so that an optimal image without distortion can be presented, the optical unit 200 is often kept near horizontal. Since the optical unit 200 does not face the user, it is possible to reduce the feeling of pressure received by the user who is the driver.

  In FIG. 7, the substrate storage portion 100 attached via an attachment member 700 (not shown) is fixedly installed on the room mirror 600 directed toward the user as described above. For this reason, the substrate storage unit 100 can be changed in orientation similar to the orientation change applied to the room mirror 600. On the other hand, as described above, the optical unit 200 including the projection unit 300 and the combiner 400 can be rotated integrally with the substrate storage unit 100 by the hinge 113. Therefore, regardless of the adjustment angle of the room mirror 600, the driver can adjust the image (virtual image) projected on the combiner 400 to a visible position without causing distortion.

  FIG. 8 is a view from the view of the mirror surface 602 side of the room mirror 600 of the head-up display 10 attached to the room mirror 600. As shown in this figure, the rotation surface of the hinge 113 that is a boundary surface between the substrate storage unit 100 and the optical unit 200 formed by the rotation of the hinge 113 is perpendicular to the mirror surface 602 and parallel to the projection axis 320. By being a smooth surface, it is in a position that does not cross the room mirror 600. Therefore, the optical unit 200 and the combiner 400 can be integrally rotated without contacting the room mirror 600 while the substrate storage unit 100 is fixed to the room mirror 600.

  FIGS. 9 and 10 are diagrams showing a space in which an image (virtual image) projected on the combiner 400 can be visually recognized. The optical unit 200 rotated by the above-described hinge 113 and the observation direction of the driver of the combiner 400 are shown in FIGS. It is a figure for demonstrating a change. For example, when both the driver B with a higher eye position than the driver A uses the head-up display 10 attached to the same vehicle, the adjustment angle by the hinge 113 when the driver A uses is shown in FIG. As shown, the angle φ1. At this angle, the driver A can visually recognize the image (virtual image) projected on the combiner 400 without distortion. On the other hand, the adjustment angle by the hinge 113 when the driver B is used is an angle φ2 larger than the angle φ1 as shown in FIG. 10, and an image (virtual image) projected on the combiner 400 to the driver B at this angle φ2. ) Can be viewed without distortion. The rotation of the hinge 113 from the angle φ1 to the angle φ2 is a straight line formed mainly by the rotation surface and the mirror surface 602 of the room mirror 600 at a position where an image displayed as a virtual image is recognized by the combiner 400. Change in a direction parallel to.

  Therefore, even if the head-up display 10 of this embodiment is installed in a narrow space in the vehicle, the combiner 400 in which the projection direction of the image display light from the projection unit 300 and the image display light are projected in a space-saving manner. Can be adjusted. Moreover, since only the optical unit 200 and the combiner 400 can be moved integrally without moving the entire head-up display 10, a space in which a display image can be easily viewed can be adjusted.

[Rotation and removal of combiner and projection unit]
FIGS. 11, 12, and 13 are diagrams for explaining a case where the head-up display 10 is attached to an attachment position corresponding to a right-hand drive vehicle and an attachment position corresponding to a left-hand drive vehicle. FIG. 11 shows a state where the projection unit 300 and the combiner 400 are removed from the optical unit main body 210 in the head-up display 10 attached to the right-hand drive vehicle. In the head-up display 10 attached for a right-hand drive vehicle, the optical unit main body 210 and the combiner 400 are arranged on the right side, which is the driver side of the rearview mirror 600, when viewed from the driver side. The substrate storage unit 100 has a first attachment surface 115 and a second attachment surface 117 opposite to the first attachment surface 115. In FIG. 11, the first attachment surface 115 is attached to an attachment member 700 (not shown). It is attached to the rearview mirror 600 in the direction of contact. Further, the optical unit main body 210 has a first main body surface 221 on the same side as the first mounting surface 115 of the substrate housing portion 100. The surface of the optical unit main body 210 that faces the first main body surface 221 is referred to as a second main body surface 222.

  In the head-up display 10 shown in FIG. 11, the first mounting surface 115 of the substrate storage unit 100 and the first main body surface 221 of the optical unit main body 210 face downward, and the projection port 301 of the projection unit 300 and the combiner 400 are The lower end 404 is attached to the rearview mirror 600 in an arrangement state where the lower end 404 is on the first main body surface 221 side. Therefore, the projection axis 320 is on the first body surface 221 side (see FIG. 1).

  FIG. 12 shows a head-up display 10 attached to a left-hand drive vehicle. As shown in this figure, when mounting for a left-hand drive vehicle, the second mounting surface 117 of the board storage portion 100 is on the lower side, and the second mounting surface 117 is in a direction in contact with the mounting member 700 (not shown). Attached to the mirror 600. In this case, the optical unit main body 210 and the combiner 400 are arranged on the left side which is the driver side of the rearview mirror 600 when viewed from the driver side.

  FIG. 13 is a diagram showing the head-up display 10 attached for a left-hand drive vehicle. The second mounting surface 117 of the substrate storage unit 100 and the second main body surface 222 of the optical unit main body 210 are on the same lower side, and the projection port 301 of the projection unit 300 and the lower end 404 of the combiner 400 are the second main body. The head-up display 10 is attached to the room mirror 600 in the arrangement state on the surface 222 side.

  As shown in FIGS. 11 and 13, in the projection unit 300 and the combiner 400, the projection port 301 and the lower end 404 are on either the first main body surface 221 side or the second main body surface 222 side of the optical unit main body 210. Even in the state, the optical unit main body 210 can be arranged. 11 and 12, it is possible to remove the projection unit 300 and the combiner 400 from the optical unit main body 210 and change their mounting directions. Although not shown, the optical unit main body 210 and the projection unit are omitted. 300 and the combiner 400 are connected by a rotating member, and the mounting direction of each can be changed via the rotating member. That is, in the head-up display 10, the projection unit 300 and the combiner 400 can be attached to the optical unit main body 210 by changing the mounting direction, and the combiner can be changed from the projection unit 300 by changing the mounting direction. The projection axis 320 relating to the arrangement of the projection ports 301 that emit the image display light projected onto 400 and the projection direction of the image display light can be on the first main body surface 221 side or on the second main body surface 222 side. .

  As shown in FIG. 13, even when the second mounting surface 117 is on the lower side, the projection unit 301 is in a state where the projection port 301 of the projection unit 300 is on the second body surface 222 side of the optical unit body 210. Since 300 can be disposed, image display light is projected downward from the optical unit main body 210. Therefore, the projection axis 320 is on the second body surface 222 side.

  As described above, the projection unit 300 and the combiner 400 can be used even when the projection port 301 and the lower end 404 are located on either the first body surface 221 side or the second body surface 222 side of the optical unit body 210. The main body 210 can be arranged. That is, projection is performed at a position where the projection port 301 of the projection unit 300 and the lower end 404 of the combiner 400 are changed by 180 ° with respect to one surface of the optical unit main body 210 (the first main body surface 221 or the second main body surface 222). The part 300 and the combiner 400 can be attached. The mounting positions of the projection unit 300 and the combiner 400 with respect to the optical unit main body 210 can be changed, and the mounting positions of the projection unit 300 and the combiner 400 with respect to the first mounting surface 115 (or the second mounting surface 117) of the substrate storage unit 100 can also be changed.

  Here, when the projection unit 300 and the combiner 400 are attached to the optical unit main body 210 by changing the attachment position by 180 °, the image (virtual image) visually recognized by the combiner 400 is the same as before the attachment is changed. In comparison, the orientation may change by 180 °. Therefore, in the head-up display 10, the circuit board 111 is before the attachment change by the detection of the attachment position and orientation of the projection unit 300 or the combiner 400 by the sensor and the driver setting through an operation unit such as a remote controller (not shown). An image signal with the image orientation changed is output.

  For example, in the head-up display 10 attached as shown in FIG. 11, the orientation of the image output at the attachment position where the projection port 301 of the projection unit 300 is on the first main body surface 221 side, and the projection port 301 of the projection unit 300. By changing the orientation of the image output at the attachment position on the second main body surface 222 side by 180 °, an image in the same direction is visually recognized even if the attachment position of the projection unit 300 with respect to the optical unit main body 210 changes by 180 °. It becomes possible to do.

  Accordingly, the image display element 240 changes the image direction (up / down / left / right, 180 °, etc.) according to the attachment position of the projection unit 300 and outputs the image. (Virtual image) can be visually recognized.

  Also, even when the left-hand drive vehicle is mounted, the rotation surface of the hinge 113 is in a position that does not cross the room mirror 600 as in the case shown in FIG. The optical unit 200 and the combiner 400 can be integrally rotated without contacting the room mirror 600 while being fixed to the room mirror 600.

[Room mirror mounting member]
Next, the attachment member 700 for attaching the image generation unit 50 including the substrate storage unit 100 and the optical unit 200 to the room mirror 600 will be described in detail. FIG. 14 is a perspective view of the mounting member 700 attached to the rearview mirror 600, and FIG. 15 is a perspective view of the mounting member 700. As shown in these drawings, the attachment member 700 has a mechanism for holding the rearview mirror 600 and fixing it to the rearview mirror 600, and includes an attachment plate 710, a pair of upper gripping portions 720, a pair of lower gripping portions 730, And a pair of claw members 740, which are coupled by a mounting screw 761.

  The mounting plate 710 is disposed between the pair of connection portions 717 connected to each of the pair of upper gripping portions 720, protrudes to the mirror surface side with a width smaller than the interval connected to the pair of upper gripping portions 720, and And a protrusion 716 having a surface on which the generation unit 50 is disposed. The connecting portion 717 has a contact portion 715 that comes into contact with the edge portion of the mirror from the upper mirror surface 602 side of the room mirror 600, and the protruding portion 716 has a pair of long holes for attaching the substrate storage portion 100. 713.

  FIG. 16 shows a side surface of the attachment member 700 when attached to the rearview mirror 600. FIG. 17 is a diagram showing in detail how the attachment plate 710 and the lower grip 730 are attached to the upper grip 720. FIG. 18 is a diagram showing in detail how the claw member 740 is attached to the lower grip 730. As mainly shown in FIG. 17, the upper grip 720 has an upper front-rear direction adjustment hole 723 and a vertical direction adjustment hole 722. The upper gripping portion 720 and the mounting plate 710 are attached by screwing a mounting screw 761 into a screw hole formed in the mounting plate 710 via the upper front-rear direction adjustment hole 723. At this time, using the upper front / rear direction adjustment hole 723 which is a long hole, the edge portion of the mirror surface 602 from the upper mirror surface 602 side of the rearview mirror 600 to the contact portion 715 of the mounting plate 710 via the buffer material 712. The position of the mirror surface in the normal direction is adjusted so that it strikes. The upper grip 720 and the lower grip 730 are attached by screwing attachment screws 761 with screw holes formed in the lower grip 730 via the vertical adjustment holes 722. At this time, the vertical position is adjusted to match the vertical height of the room mirror 600 using the vertical adjustment hole 722 which is a long hole, and the upper side contacts the contact portion 715 via the cushioning material 712. As described above, the lower side is fixed so as to come into contact with the claw member 740 via the cushioning material 742.

  Further, as mainly shown in FIG. 18, the lower gripping portion 730 and the claw member 740 have attachment screws 761 (not shown) opened in the claw member 740 through the lower front / rear direction adjustment hole 733. The screw hole 735 is attached by screwing. At this time, using the lower front / rear direction adjusting hole 733 which is a long hole, the edge portion of the mirror surface 602 from the lower mirror surface 602 side of the rearview mirror 600 comes into contact with the claw member 740 via the cushioning material 742. The position of is adjusted.

  As described above, the mounting member 700 of the present embodiment can be independently adjusted according to the thickness and height in the normal direction of the upper and lower mirror surfaces 602 of the rearview mirror 600, so It can be attached to the rear mirror of vehicles of different shapes or types. Further, since the mounting plate 710 has a contact portion 715 that contacts the edge portion of the mirror surface 602, the mirror surface 602, the protruding portion 716, The positional relationship is maintained. Thereby, also in the room mirror 600 of a different vehicle, the image generation unit 50 can be arranged with an appropriate positional relationship from the mirror surface 602. Moreover, compared with the case where the contact part 715 and the protrusion part 716 are provided separately, the number of parts and the number of attachment processes can be reduced.

  FIG. 19 is a diagram showing a state when the image generation unit 50 of the head-up display 10 is attached using the pair of long holes 713 of the protrusion 716 of the attachment plate 710, as viewed from below. Even when any one of the first attachment surface 115 and the second attachment surface 117 of the image generation unit 50 is opposed to the attachment surface of the attachment plate 710, the image generation unit 50 has a pair of long holes 713. Used to be fixed to the mounting plate 710 by mounting screws 761. The pair of long holes 713 of the mounting plate 710 are disposed so as to extend in a direction perpendicular to the mirror surface 602 when the contact portion 715 is in contact with the edge portion on the mirror surface 602 side of the upper portion of the rearview mirror 600. When the substrate storage unit 100 is attached, the longitudinal direction of the pair of long holes 713, that is, the position in the direction perpendicular to the mirror surface 602 can be adjusted.

  FIG. 20 is a view showing the state when the image generation unit 50 is attached, as seen from the lower side, similarly to FIG. 19, and shows the case where the combiner is installed facing the right side from the mirror surface 602. Yes. The width of each hole of the long hole 713 is formed larger than the screw diameter of the mounting screw 761, and as shown in FIG. 20, a line connecting the positions where the mounting screws 761 passing through the respective long holes 713 are mounted. However, it can attach so that it may become diagonal with respect to the direction where the long hole 713 is extended. Thereby, it is possible to adjust the orientation with the normal of the surface of the mounting plate 710 of the substrate storage unit 100 as the rotation axis. That is, since the substrate storage unit 100, the optical unit 200, and the combiner 400 can be integrally rotated using the pair of long holes 713, the driver visually recognizes an image (virtual image) displayed on the combiner 400. The orientation can be adjusted so that the position can be achieved.

  As shown in FIGS. 19 and 20, the attachment member 700 of the present embodiment has a protruding portion 716 having a width smaller than the width to which the pair of upper gripping portions 720 are attached. Therefore, even if any one of the first mounting surface 115 and the second mounting surface 117 of the image generation unit 50 and the mounting surface of the mounting plate 710 are opposed to each other, the normal line of the mounting plate 710 is used as the rotation axis. Even when the angle is adjusted, the corner portion of the protruding portion 716 does not protrude from the end of the substrate storage portion 100. Therefore, the driver and passengers are not given a feeling of pressure, and the attachment member can be attached without conspicuous. Further, according to the attachment member 700 of the present embodiment, the image generating unit 50 can be attached to the rearview mirror 600, so that the combiner 400 or the like is located at a position where the viewpoint movement is small when the driver near the rearview mirror views the display image. The display portion can be arranged.

  21 is a cross-sectional view of the mounting screw 761 when the first mounting surface 115 of the substrate storage unit 100 is mounted so as to contact the mounting plate 710, and FIG. 22 is a second mounting surface of the substrate storage unit 100. It is sectional drawing of the attaching screw 761 part when 117 is attached so that 117 may contact the attachment plate 710. FIG. In general, since the gap between the upper side of the rearview mirror 600 and the ceiling is very narrow, the mounting screw 761 is below whether the first mounting surface 115 is in contact with the mounting plate 710 or the second mounting surface 117 is in contact with the mounting plate 710. Only tighten from. In addition, since the board housing portion 100 is also designed to be as thin as possible, there is a through hole at the fixing position of the circuit board 111 with the mounting screw 761, which enables fixing with a longer screw. The first mounting surface 115 is formed with an insert nut 116 that is a fixing member engaging portion extending to the second mounting surface 117, and a through hole is formed at a corresponding position of the second mounting surface 117. 761 is configured to be engaged and fixed with the same insert nut 116 regardless of whether the first attachment surface 115 is in contact with the attachment plate 710 or the second attachment surface 117 is in contact with the attachment plate 710. Therefore, the board storage unit 100 can be installed even in a narrow area between the vehicle rearview mirror 600 and the ceiling. Therefore, in the head-up display 10 of the present embodiment, the position and angle can be adjusted in a space-saving manner.

  DESCRIPTION OF SYMBOLS 10 Head-up display, 50 Image generation part, 100 Board | substrate storage part, 111 Circuit board, 112 Board | substrate storage part side opening part, 113 Hinge, 114 Anti-rotation mechanism, 115 1st attachment surface, 116 Insert nut, 117 2nd attachment Surface, 118 set screw, 200 optical unit, 210 optical unit body, 212 reference surface, 221 first body surface, 222 second body surface, 231 light source, 232 collimating lens, 233 UV-IR cut filter, 234 polarizer, 235 Fly-eye lens, 236 reflector, 237 field lens, 238 wire grid polarization beam splitter, 239 1/4 wavelength plate, 240 image display element, 241 analyzer, 242 projection lens group, 243 heat sink 245 optical system arrangement unit, 246 flexible cable, 247 optical unit side opening, 248 space unit, 300 projection unit, 301 projection port, 320 projection axis, 351 first projection mirror, 352 second projection mirror, 360 intermediate image screen, 400 combiner, 450 virtual image, 472 storage hinge, 600 room mirror, 602 mirror surface, 604 upper end, 606 lower end, 700 mounting member, 710 mounting plate, 712 cushioning material, 713 long hole, 715 contact portion, 716 protrusion, 717 Connection part, 720 Upper gripping part, 722 Vertical adjustment hole, 723 Upper longitudinal adjustment hole, 730 Lower gripping part, 733 Lower longitudinal adjustment hole, 735 Screw hole, 740 Claw member, 761 Mounting screw.

Claims (4)

An image generation unit that generates and projects video light from an image signal of an image to be displayed; and
A combiner attached to the image generation unit and onto which the image is projected;
A plate-like mounting plate for mounting the image generating unit on the vehicle;
The mounting plate is connected, and includes a pair of grip portions that are attached to the rearview mirror so as to grip the rearview mirror of the vehicle,
Said mounting plate, so as to define a positional relationship between the room mirror and the image generating unit, have a contact portion abutting on the room mirror,
The abutment portion extends on a side opposite to a surface side on which the image generation unit is installed in the mounting plate, and abuts on the room mirror from a mirror surface side on an upper portion of the room mirror. Vehicle display device. The vehicle display device according to claim 1 ,
The mounting plate further includes a protruding portion that protrudes toward the mirror surface with a width smaller than an interval between positions connected to the pair of gripping portions, and has a surface on which the image generating portion is disposed. Display device. The vehicle display device according to claim 1 or 2 ,
The mounting plate has a pair of elongated holes extending in parallel,
The image generating unit is connected to the mounting plate by a mounting screw using the pair of long holes at two predetermined positions of the image generating unit,
The width of the long hole is formed larger than the screw diameter of the mounting screw so that a line connecting the two predetermined positions can be mounted vertically or obliquely with respect to the direction in which the long hole extends. A vehicle display device characterized by that. The vehicle display device according to any one of claims 1 to 3 ,
The image generation unit
A board storage section for storing a circuit board that generates and outputs an image signal of an image to be displayed;
An optical unit that has a light source and generates and projects an image based on an image signal output from the circuit board;
The attachment plate is attached to the substrate storage unit,
The vehicle display device, wherein the combiner is attached to the substrate housing portion via the optical unit.

Images