JP6515796B2 - Head-up display device - Google Patents

Description

  The disclosure of this specification relates to a head-up display device that displays a virtual image that can be viewed by an occupant of a moving object.

  Conventionally, for example, Patent Document 1 discloses a configuration in which a projection member such as a half mirror is provided separately from a windshield of a vehicle in a head-up display device (hereinafter referred to as HUD device) mounted on the vehicle There is. The projection member is curved in a concave shape that is continuous with the top surface of the meter hood when stored. Due to the concave shape of the projection member, an imaging position at which light projected onto the projection member is imaged as a virtual image is moved away from the viewpoint position of the projection member and hence the occupant.

JP, 2014-91466, A

  Now, in the HUD device of Patent Document 1, various images are formed at one imaging position defined by the concave shape of the projection member. Here, recent HUD devices are required to notify a passenger of a wide variety of information by virtual image display. However, in the HUD device of Patent Document 1, it is substantially impossible to switch the imaging position of the image to be notified of the information according to the characteristics of the information to be notified to the occupant. As a result, the occupant may fail to recognize the information presented by the HUD device or may feel bothersome of the information presented frequently.

  The present disclosure has been made in view of such a problem, and an object thereof is to provide an HUD device capable of displaying an image for notifying information as a virtual image so as to be appropriately noticed by a passenger. is there.

In order to achieve the above object, the first aspect disclosed is a HUD device mounted on a mobile unit (A) and displaying a virtual image (60) visible by an occupant of the mobile unit, and forming an image as a virtual image an image display device which emits light of (70) (2 40) which is, the windshield of the moving body (13) provided separately, a plurality of projections which light different images are projected by the display device has a region (2 3 0), with the light of the image projected on the projection area, the projection member for imaging at the imaging position of the different distances from the projection area (2 2 0), a, projection member, between two projected regions adjacent to each other, the step portion forming the step along the incident direction of light incident on the projection area (226a, 226b) are HUD device that have a.
The second aspect disclosed is a head-up display device mounted on a mobile body (A) and displaying a virtual image (60) visible by an occupant (D) of the mobile body, and is imaged as a virtual image Displays (40, 240) for emitting the light of the image (70), and a plurality of projections which are provided separately from the windshield (13) of the movable body and light of different images are projected by the display A projection member (20, 220, 320) having an area (30, 230, 330) for imaging the light of each image projected on each projection area at an imaging position at a different distance from each projection area; And a plurality of projection areas, a front projection area (31 to 33, 231, 331, 333) located in front of the occupant, and a side projection area (34, 35) located on the side of the front projection area. , 234, 235, 334 335) and includes, lateral projection region with increasing distance from the front projection area along the width direction of the moving body, are HUD device is a position which is inclined toward the driver.

  In this aspect, since the projection member is provided separately from the windshield, freedom in the shape of the projection member can be secured. Therefore, providing a plurality of projection areas different from each other on the projection member, and defining the shape of the projection member so that the light of each image is imaged at the imaging positions at different distances from each projection area Becomes possible.

  By using the above-described projection member, by switching the projection area, it is possible to change the imaging position of the image for notifying the occupant of the information according to the characteristics of the information. Therefore, the HUD device can display an image for notifying information as a virtual image so as to be noticed properly by the occupant.

  The reference numerals in the parentheses above merely show an example of the correspondence with specific configurations in the embodiments to be described later, and do not limit the technical scope at all.

It is a front view which shows typically the state which looked at the virtual image display by HUD device of a first embodiment from a driver's seat. It is sectional drawing which shows the structure of a center combiner typically. It is a top view which shows typically the positional relationship of each virtual image imaged in a mutually different position with the arrangement | positioning of each combiner and each display surface. It is a block diagram which shows the structure of the electric system of a HUD apparatus. It is a front view which shows typically the state which looked at the virtual image display by the HUD apparatus of 2nd embodiment from the driver's seat. It is a top view which shows typically the positional relationship of each virtual image in 2nd embodiment with arrangement | positioning of a combiner and a display surface. It is a front view which shows typically the state which looked at the virtual image display by the HUD apparatus of 3rd embodiment from the driver's seat.

  Hereinafter, a plurality of embodiments of the present disclosure will be described based on the drawings. In addition, the overlapping description may be abbreviate | omitted by attaching the same code | symbol to the corresponding component in each embodiment. When only a part of the configuration is described in each embodiment, the configuration of the other embodiments described above can be applied to other parts of the configuration. In addition to the combinations of the configurations explicitly described in the description of each embodiment, the configurations of the plurality of embodiments can be partially combined with each other even if they are not explicitly specified unless any problem occurs in the combination. .

First Embodiment
A head-up display (HUD) device 100 according to a first embodiment of the present disclosure shown in FIGS. 1 to 3 is mounted on a vehicle A. The HUD device 100 displays various virtual images 60 visible by the driver D who is an occupant of the vehicle A. The HUD device 100 is disposed in front of the driver D. The body portion of the HUD device 100 is housed in a meter hood 11 that covers the top of the combination meter 110.

  The HUD device 100 is configured by a combiner unit 20, a display unit 40, a housing 50, a control circuit 80 (see FIG. 4), and the like.

  The combiner unit 20 is provided separately from the windshield 13 at a position away from the windshield 13 of the vehicle A toward the driver. The combiner unit 20 has a plurality of projection areas 30. On each projection area 30, the light of various images 70, which are imaged as a virtual image 60, is projected by the display unit 40.

  The combiner unit 20 includes a center combiner 20a and a pair of side combiners 20b and 20c. Each of the combiners 20a to 20c is a half mirror that transmits a part of incident light and reflects another part. Each of the combiners 20a to 20c is formed in a curved plate shape by a translucent material such as polycarbonate resin, acrylic resin, and glass.

  The center combiner 20 a is disposed between the two side combiners 20 b and 20 c in the width direction of the vehicle A, and is located in front of the driver D. The center combiner 20a is formed in a horizontally long substantially rectangular shape. The center combiner 20a protrudes upward from the meter hood 11 in a posture in which the plate surface direction is aligned with the cross section of the vehicle A. The center combiner 20a has a plurality of (three) curved surface portions 21 to 23 formed in a concave shape on a projection surface facing the driver's seat side. The upper curved surface portion 21, the intermediate curved surface portion 22, and the lower curved surface portion 23 are aligned in the vertical direction of the vehicle A in a stationary state.

  The upper curved surface portion 21 is defined at the top among the three curved surface portions 21 to 23. The upper curved surface portion 21 is located below the horizontal line of sight axis HVA, and is closer to the horizontal line of sight axis HVA than the other two curved surface portions 22 and 23. The horizontal line of sight axis HVA is a virtual axis that assumes the line of sight of the driver D looking forward along the horizontal ground in the vehicle A in a stationary state. The curvature serving as the reference of the upper curved surface portion 21 is set larger than the curvatures of the other two curved surface portions 22 and 23. A far projection area 31 is defined in the upper curved surface 21.

  The middle curved surface 22 is located between the upper curved surface 21 and the lower curved surface 23. The curvature serving as the reference of the intermediate curved surface portion 22 is set smaller than the curvature of the upper curved surface portion 21 and is set larger than the curvature of the lower curved surface portion 23. An intermediate projection area 32 is set in the intermediate curved surface portion 22.

  The lower curved surface portion 23 is located below the intermediate curved surface portion 22. The curvature serving as the reference of the lower curved surface portion 23 is set smaller than the curvatures of the other two curved surface portions 21 and 22. In the lower curved surface portion 23, a near projection area 33 is defined.

  As described above, one projection area 30 is defined in each of the upper curved surface portion 21, the intermediate curved surface portion 22, and the lower curved surface portion 23. The distant projection area 31, the intermediate projection area 32, and the near projection area 33 are respectively defined in each curved surface portion 21 in a substantially rectangular shape that is horizontally long. Each of the projection areas 31 to 33 functions as a concave mirror with a different enlargement factor due to the shapes of the curved surface portions 21 to 23 formed with curvatures different from each other. From the correlation of the curvatures of the curved surface portions 21 to 23 described above, the enlargement ratio of the far projection region 31 becomes larger than the enlargement ratio of the middle projection region 32, and the enlargement ratio of the near projection region 33 is the enlargement of the middle projection region 32 Less than the rate.

  According to such a configuration, the light of each of the images 70 projected onto the projection areas 31 to 33 is imaged at imaging positions at different distances from the projection areas 31 to 33. Specifically, at the imaging position where the light of the image 70 projected on the far projection area 31 is imaged as the far virtual image 61, the light of the image 70 projected on the intermediate projection area 32 is imaged as the mid virtual image 62 This position is farther from the center combiner 20a than the imaging position. Similarly, the imaging position at which the light of the image 70 projected on the near projection area 33 is imaged as the near virtual image 63 is closer to the center combiner 20 a than the imaging position of the intermediate virtual image 62. Specifically, the far virtual image 61 is imaged about 1.5 meters forward from the far projection area 31. In addition, the intermediate virtual image 62 is imaged about 0.7 meters in front of the intermediate projection area 32. Then, the near virtual image 63 is imaged about 0.5 meters forward from the near projection area 33.

  The projection areas 31 to 33 described above are defined at mutually separated positions so as not to overlap each other on the projection plane. Therefore, two connection portions 26a and 26b are formed in the center combiner 20a. The connection portion 26 a is located between the far projection area 31 and the middle projection area 32 in the center combiner 20 a. The connecting portion 26 a connects the upper curved surface portion 21 and the intermediate curved surface portion 22 which are curved with different curvatures. On the other hand, the connection portion 26 b is located between the intermediate projection area 32 and the near projection area 33 in the center combiner 20 a. The connection portion 26 b continues the intermediate projection area 32 and the near projection area 33 which are curved with different curvatures.

  Of the connection portions 26a and 26b, light shielding portions 28a and 28b are provided in the back surface area facing the windshield 13, respectively. Each of the light shielding portions 28a and 28b is formed in a thin film shape by a light shielding paint. The light shielding portion 28 a blocks the incidence of outside light on the connection portion 26 a by covering the rear surface area of the connection portion 26 a. The light shielding portion 28 b blocks the incidence of external light on the connection portion 26 a by covering the rear surface area of the connection portion 26 b. The light shielding portions 28a and 28b may be formed of a light shielding resin material formed in a thin plate shape.

  The side combiners 20b and 20c are disposed one by one on both sides of the center combiner 20a in the width direction of the vehicle A. The side combiners 20b and 20c are disposed slightly behind (on the driver's seat side) the center combiner 20a in the front-rear direction of the vehicle A. The side combiner 20b is located on the left side of the center combiner 20a as viewed from the driver D. The side combiner 20c is located on the right side of the center combiner 20a as viewed from the driver D.

  Each side combiner 20b, 20c is formed in a substantially quadrilateral shape, respectively. The side combiners 20b and 20c have a shape and arrangement that are plane-symmetrical with respect to a virtual center plane that divides the center combiner 20a into left-right symmetry. The side combiners 20b and 20c are installed in an inclined posture with respect to the center combiner 20a such that the projection plane on which the light of the image 70 is projected is directed to the driver's seat side.

  The side combiner 20b has a side curved surface portion 24 on a projection surface facing the driver. A left projection region 34 is defined in the side curved surface portion 24. The side combiner 20c has a side curved surface 25 on the projection surface facing the driver. A rightward projection area 35 is defined in the side curved surface portion 24. As the left projection area 34 and the right projection area 35 move away from the projection areas 31 to 33 along the width direction of the vehicle A due to the mounting postures of the side combiners 20b and 20c, the driver's seat (driver D) side It has an inclined posture (see FIG. 3). The leftward projected region 34 and the rightward projected region 35 are formed with substantially the same curvature, and function as concave mirrors with the same magnification. The curvature serving as the reference of the leftward projected region 34 and the rightward projected region 35 is different from any curvature of each of the projected regions 31 to 33.

  The imaging positions at which the light of the image 70 projected on the above leftward projection region 34 and rightward projection region 35 is imaged as the leftward virtual image 64 and rightward virtual image 65 are left and right from the front of the driver D It will be a shifted position. The left virtual image 64 and the right virtual image 65 are imaged in an inclined posture with respect to the cross section of the vehicle A by the oblique arrangement of the left projection region 34 and the right projection region 35 surrounding the driver D. . As a result, the left virtual image 64 and the right virtual image 65 are displayed with a depth in the front-rear direction of the vehicle A as viewed from the driver D.

  Specifically, the left virtual image 64 displayed in front of the left of the driver D is imaged with a depth in a predetermined range of about 0.7 meters from the left projection area 34. Similarly, the right virtual image 65 displayed in front of the right of the driver D is imaged with a front and rear depth in a predetermined range of about 0.7 meters from the right projection area 35. Thus, the distance from each projection area 34, 35 to the imaging position of each virtual image 64, 65 is different from the distance from each projection area 31, 33 to the imaging position of each virtual image 61, 63.

  Here, the curvature serving as a reference in each of the curved surface portions 21 to 25 is a curvature defined at each center in a reference cross section orthogonal to each projection region 30 at the center of each projection region 30 and along the vertical direction. The curvature of each projection area 30 may be constant at the center curvature or may gradually change as it goes away from the center. In addition, the enlargement factor of each projection area 30 is also set based on the curvature of the center of each projection area 30. Furthermore, the curvature of each projection area 30 may be constant at the center curvature or at a distance from the center in a horizontal section orthogonal to each projection area 30 at the center of each projection area 30 and along the horizontal direction. It may change gradually.

  The center of each projection area 30 is taken as the barycentric position of the projection area 30 for convenience. The optical axis of the light of each image 70 is assumed to be incident on the center of each projection area 30. In addition, each of the curved surface portions 21 to 25 forming each of the projection areas 30 may have a Fresnel lens shape in which a plurality of divided curved surfaces are arranged to be shifted in the thickness direction.

  The display unit 40 is configured to emit light of the image 70 toward the plurality of projection areas 30 formed in the combiner unit 20. The display unit 40 is disposed behind the center combiner 20 a in the front-rear direction of the vehicle A. The display unit 40 can project the light of the images 70 different from each other on each of the projection areas 31 to 35. As shown in FIGS. 2 to 4, the display unit 40 includes a plurality of liquid crystal panels 45 to 47 of a TFT (Thin Film Transistor) system, and a projection light source 48 for transmitting and illuminating each of the liquid crystal panels 45 to 47. There is.

  Each of the liquid crystal panels 45 to 47 has display surfaces 41 to 43, respectively. Each of the display surfaces 41 to 43 is formed in a rectangular flat plate shape. The display surfaces 41 to 43 emit the light of the image 70 toward the different projection areas 30. On each of the display surfaces 41 to 43, a large number of pixels are two-dimensionally arranged. Each pixel is provided with red, green and blue sub-pixels. The liquid crystal panels 45 to 47 can color-display various images 70 on the display surfaces 41 to 43 by controlling the light transmittance of the sub-pixels.

  The liquid crystal panel 45 is installed in the housing 50 in a posture in which the central display surface 41 faces the projection areas 31 to 33 of the center combiner 20a. The central display surface 41 emits light of the image 70 toward the projection areas 31 to 33. On the central display surface 41, an image 70 formed as virtual images 61 to 63 is formed in a form in which distortion caused by reflection in the projection regions 31 to 33 is corrected. The liquid crystal panel 45 controls the display of the central display surface 41 so as not to project the image 70 on the connection portions 26 a and 26 b which are out of the projection areas 31 to 33.

  The liquid crystal panel 46 is installed in the housing 50 with the left display surface 42 facing the left projection area 34 of the side combiner 20 b. The left display surface 42 emits the light of the image 70 toward the left projection area 34. On the left display surface 42, an image 70 formed as a left virtual image 64 is formed in a form in which distortion caused by reflection in the left projection area 34 is corrected.

  The liquid crystal panel 47 is installed in the housing 50 with the right display surface 43 facing the right projection area 35 of the side combiner 20c. The right display surface 43 emits the light of the image 70 toward the right projection area 35. On the right side display surface 43, an image 70 formed as the right side virtual image 65 is formed in a form in which distortion caused by reflection in the right side projection region 35 is corrected.

  In the liquid crystal panel 45 and the liquid crystal panels 46 and 47 described above, the distances of the optical paths from the display surfaces 41 to 43 to the projection areas 30 on which the light of the image 70 is projected by the display surfaces 41 to 43 are different from each other ing. The optical path distance is a distance from the center of the range in which the image 70 is displayed among the display surfaces 41 to 43 to the center of the projection area 30.

  The projection light source 48 includes a plurality of LEDs that emit white light source light, and a prism that guides the light emitted from each LED to the liquid crystal panels 45 to 47. The light emitted from each LED is guided to the back side of each display surface 41 to 43, and transmits and illuminates the image 70 formed on each display surface 41 to 43. The light which passed each display surface 41-43 is projected on each projection area 31-35.

  The housing 50 is a housing of the HUD device 100 formed in a box shape of a resin material as shown in FIGS. 2 and 3. The housing 50 accommodates the display unit 40 and the control circuit 80. The housing 50 is housed in the meter hood 11 so as to be less visible to the driver D. The housing 50 supports the combiner unit 20, and fixes each of the combiners 20a to 20c in a specific posture.

  The housing 50 is formed with a projection opening 51. The projection openings 51 are through openings formed in the irradiation range of light emitted from the display surfaces 41 to 43 to the projection areas 31 to 35 in the ceiling wall of the housing 50. The projection openings 51 enable the projection of light from the display surfaces 41 to 43 to the projection areas 31 to 35. A lid member 52 is fitted into the projection opening 51. The lid member 52 is formed in a plate shape by a translucent resin material. The lid member 52 prevents the entry of dust and dirt into the housing 50 by physically blocking the projection opening 51 while allowing the light transmission of the image 70.

  The control circuit 80 is a circuit which controls the display of each virtual image 60, as shown in FIG. 4 and FIG. The control circuit 80 mainly includes a microcontroller 81 having a processor, a RAM, a storage medium, and the like. The control circuit 80 is connected to a display control device 88 mounted on the vehicle A in addition to the liquid crystal panels 45 to 47 and the projection light source 48.

  The display control device 88 is connected to the communication bus 89 mounted on the vehicle A. The communication bus 89 outputs information of the vehicle A based on the detection results of various on-board sensors. The display control device 88 acquires the information of the vehicle A through the communication bus 89. The display control device 88 selects an image 70 for notifying the driver D of the acquired information of the vehicle A. In addition, the display control device 88 determines the projection area 30 on which the selected image 70 is to be projected, based on the characteristics of the acquired information of the vehicle A. The display control device 88 outputs, to the control circuit 80, a control signal for projecting the selected image 70 on the determined projection area 30. The control circuit 80 performs display control of the liquid crystal panels 45 to 47 and light emission control of the projection light source 48 in accordance with a control signal output from the display control device 88.

  The details of each virtual image 60 displayed by the HUD device 100 based on the control by the control circuit 80 and the display control device 88 described above will be described based on FIGS. 1 and 2.

  The distant projection area 31 is projected with the light of the image 70, which is high in at least one of the degree of urgency and the degree of importance and which notifies the driver D of information desired to be recognized immediately. Specifically, the light of the image 70 relating to the preventive safety display, the route guidance display, etc. is projected onto the far projection area 31 and imaged as the far virtual image 61 near the horizontal visual axis HVA. As a kind of preventive safety display, for example, an AEB (Autonomous Emergency Braking) indicator image 71a etc. for notifying or giving notice of the operation of a collision damage reduction (automatic) brake mounted on the vehicle A is displayed as a distant virtual image 61. Further, as one type of the route guidance display, for example, a turn-by-turn image 71 b or the like notifying of a point to turn to the left or right is displayed as a distant virtual image 61. The AEB indicator image 71a and the turn-by-turn image 71b are temporarily displayed only for a period in which the information to be notified is valid.

  The light of the image 70 is mainly projected onto the intermediate projection area 32 to notify information as feedback to the driver D's input. Specifically, the light of the image 70 associated with the entertainment apparatus mounted on the vehicle A and the comfort apparatus is projected onto the intermediate projection area 32 and imaged as an intermediate virtual image 62. The intermediate virtual image 62 is located below the distant virtual image 61 in appearance from the driver D. For example, a track image 72 for notifying information of a music piece selected by the driver D, an image for notifying a set temperature of an air conditioner selected by the driver D, and the like are displayed as an intermediate virtual image 62. The truck image 72 and the like are displayed only for a predetermined period after the operation is performed, when the driver such as the driver D inputs an operation.

  The light of the image 70 for mainly notifying the traveling state of the vehicle A is projected on the near projection area 33. For example, a vehicle speed image 73a indicating the traveling speed of the vehicle A, an eco-drive indicator image 73b based on the instantaneous fuel consumption of the vehicle A, and the like are formed as the near virtual image 63. The near virtual image 63 is located below the intermediate virtual image 62 in appearance from the driver D. The vehicle speed image 73a and the eco-drive indicator image 73b are always displayed at least while the vehicle A is traveling. The light of the image 70 notifying the left and right situations of the vehicle A is projected onto the leftward projected area 34 and the rightward projected area 35. For example, a lane line indicator image 74a indicating whether the lane line is correctly recognized by the driving support system is displayed in a mode in which the left virtual image 64 and the right virtual image 65 are combined. In addition, a pedestrian warning image 74b notifying a pedestrian approaching from the front side, and a blind spot monitor (BSM) image 74c notifying notification of the approach of a following vehicle traveling in an adjacent lane are the left virtual image 64 and the right The virtual image 65 can be displayed.

  In the first embodiment described so far, since the combiner unit 20 is provided separately from the windshield 13, the freedom of the shape of each of the combiners 20a to 20c is secured. Therefore, after providing a plurality of projection areas 30 different from each other in each of the combiners 20a to 20c, the light of each image 70 is imaged at an imaging position at a different distance from each projection area 30. It becomes possible to define the shape of 20a-20c.

  By using the combiner unit 20 having such a configuration, by switching the projection area 30 on which the image 70 is projected, the imaging position of the image 70 for notifying the driver D of information can be changed according to the characteristics of the information. Therefore, the HUD device 100 can display the image 70 for notifying information as a virtual image so that the driver D appropriately notices.

  In addition, in the first embodiment, the projection areas 30 are defined in the plurality of curved surface portions 21 to 25 having different concave curvatures. With such a configuration, each projection area 30 can form the light of the image 70 incident from the display unit 40 as a virtual image 60 with different magnifications. As a result, each virtual image 60 by each projection area 30 is reliably imaged at a different position. As described above, in order to realize the HUD device 100 capable of changing the imaging position of the virtual image 60, the combiner unit 20 having the plurality of curved surface portions 21 to 25 different in curvature is particularly preferable.

  Further, in the first embodiment, the far-field virtual image 61 is formed at a position farther from the far projection area 30 than the far-field projection area 31 located uppermost in the center combiner 20a. With such a configuration, the distant virtual image 61 is formed in or near the range of the central vision of the driver D, so that the driver D can adjust the distant virtual image 61 with only a slight change in the viewing direction and focal length. Become aware of it. Therefore, the notification through the distant virtual image 61 enables the HUD device 100 to make the driver D notice the information with high urgency and importance. Therefore, the configuration in which the far projection area 31 with a large magnification ratio is provided above the center combiner 20a is a preferred configuration in order to realize a virtual image display that the driver D can appropriately notice.

  Furthermore, in the first embodiment, the left and right side combiners 20b and 20c are directed diagonally so as to surround the driver D. Therefore, when viewed from the driver D, the left virtual image 64 and the right virtual image 65 have a deep display. According to the above, since the HUD device 100 can widen the expression of virtual image display, the HUD device 100 can carry out information presentation more easily noticed by the driver D.

  In addition, in the HUD device 100 of the first embodiment, a difference is also provided in the distance of the optical path from each display surface 41 to 43 to each projection area 30 by using the plurality of liquid crystal panels 45 to 47. In the above configuration, it is possible to provide a difference in the imaging position of each virtual image 60 not only by the difference in the enlargement ratio of each projection area 30 but also by the difference in the optical path distance. Therefore, it becomes easier to provide a clear difference in the imaging position of the virtual image 60.

  In the first embodiment, the shape such as the curvature is different for each projection area 30. Therefore, in the connection portions 26a and 26b between two adjacent projection areas 30, the change in shape is difficult to be smooth, and an inflection point is easily generated. Therefore, it is desirable that the two adjacent projection areas 30 be defined in a separated position so as not to touch each other so that the light of the image 70 is not projected onto such connection portions 26a and 26b.

  Furthermore, in the first embodiment, the light shielding portions 28a and 28b block the incidence of external light on the connection portions 26a and 26b. As described above, since the connection portions 26a and 26b do not smoothly change in shape, the incident external light may be reflected to the driver D side to be noticeable. Therefore, in the HUD device 100 in which the light shielding portions 28a and 28b are provided, in which the curved surface portions 21 to 23 having different curvatures are arranged in one center combiner 20a, the configuration particularly necessary to prevent the deterioration of the appearance. It becomes.

  In the first embodiment, the vehicle A corresponds to a "moving member", the combiner unit 20 corresponds to a "projection member", and the upper curved surface 21, the intermediate curved surface 22, the lower curved surface 23, and the side curved surface 24, 25 correspond to the "curved surface portion". In addition, the far projection area 31 corresponds to the “upper projection area” and the “front projection area”, the intermediate projection area 32 corresponds to the “front projection area”, and the near projection area 33 corresponds to the “lower projection area” and the “front projection It corresponds to "area". Furthermore, the leftward projection area 34 and the rightward projection area 35 correspond to the “lateral projection area”. The display unit 40 corresponds to a "display", and the central display surface 41, the left display surface 42, and the right display surface 43 correspond to "display surfaces".

Second Embodiment
The HUD device 200 of the second embodiment shown in FIGS. 5 and 6 is a modification of the first embodiment. The HUD device 200 according to the second embodiment includes a combiner 220 having a plurality of projection areas 230 and a display unit 240 as a configuration corresponding to the combiner unit 20 and the display unit 40 (see FIG. 1) of the first embodiment. There is.

  The combiner 220 is formed by board materials, such as translucent resin material or glass, similarly to each combiner 20a-20c (refer FIG. 1) of 1st embodiment. The combiner 220 is bent at a plurality of points, and has a three-dimensional shape. The combiner 220 has a front curved surface portion 221, side curved surface portions 224 and 225, and step portions 226a and 226b.

  The front curved surface portion 221 and the respective side curved surface portions 224, 225 are formed on the projection surface of the combiner 220 facing the driver's seat side. The front curved surface portion 221 is provided at the center in the width direction of the combiner 220. The front curved surface portion 221 is formed in a horizontally long substantially rectangular shape. A front projection area 231 is defined in the front curved surface portion 221.

  The front projection area 231 is located in front of the driver D. The front projection area 231 functions as a concave mirror having a predetermined magnification, due to the shape of the front curved surface portion 221 curved in a concave shape. The light of the image 70 projected on the front projection area 231 is imaged as a distant virtual image 61 forward about 1.5 meters from the front projection area 231.

  In the second embodiment, the AEB indicator image 71a, the turn-by-turn image 71b, the vehicle speed image 73a, the eco-drive indicator image 73b, and the like are displayed as the distant virtual image 61. Each image 70 displayed with a time limit, such as the AEB indicator image 71a and the turn-by-turn image 71b, is imaged in the upper part close to the horizontal visual axis HVA (see FIG. 2) among the plurality of distant virtual images 61. . On the other hand, each of the constantly displayed images 70 such as the vehicle speed image 73 a and the eco-drive indicator image 73 b is formed downward among the plurality of distant virtual images 61.

  The side curved surface portions 224 and 225 are respectively provided on both sides of the front curved surface portion 221 in the width direction. The side curved surface portions 224 and 225 are located at the rear of the vehicle A with respect to the front curved surface portion 221. Each of the side curved surface portions 224 and 225 is formed in a horizontally elongated substantially rectangular shape narrower than the front curved surface portion 221. Among the two edges of the side curved surface portions 224 and 225 extending along the vertical direction, the outer edges far from the front curved surface portion 221 are closer to the inner edges closer to the front curved surface portion 221, It is located at the rear of the vehicle A. A leftward projected region 234 is defined in the side curved surface portion 224 located on the left side of the front curved surface portion 221 as viewed from the driver D. A right-side projection area 235 is defined in the side curved surface portion 225 located on the right side of the front curved surface portion 221 when viewed from the driver D.

  The leftward projected area 234 and the rightward projected area 235 are directed to the driver's seat side by the inclined postures of the side curved surface portions 224 and 225 described above. The leftward projected area 234 and the rightward projected area 235 are formed with substantially the same curvature, and function as concave mirrors with the same magnification. The curvature serving as the reference of the leftward projected region 234 and the rightward projected region 235 is different from the curvature of the front curved surface portion 221 and is set to a value smaller than the curvature of the front curved surface portion 221. Therefore, the enlargement factors of the leftward projection area 234 and the rightward projection area 235 are smaller than the enlargement factors of the front curved surface portion 221.

  With the above-described configuration, the light of the image 70 projected onto the projection areas 234 and 235 becomes each of the projection areas as the left virtual image 64 and the right virtual image 65 having the depth in the front-rear direction as in the first embodiment. Images are formed in predetermined ranges of about 234 and 235 to about 0.7 meters, respectively. The left virtual image 64 and the right virtual image 65 are imaged at a position closer to the driver D than the far virtual image 61. Also in the second embodiment, the dividing line indicator image 74a, the pedestrian warning image 74b, the BSM image 74c and the like are displayed as the left virtual image 64 and the right virtual image 65.

  Each stepped portion 226a, 226b is provided between two projection areas 230 adjacent to each other. Each step portion 226a, 226b is formed in a substantially flat plate shape along the longitudinal direction and the vertical direction of the vehicle A. The stepped portion 226 a is located between the front curved surface portion 221 and the left projection region 234. The stepped portion 226 b is located between the front curved surface portion 221 and the right projection region 235. Each of the step portions 226a and 226b forms a step along the incident direction of light entering the projection areas 231, 234, and 235 from the display unit 240. Specifically, the leftward projection area 234 and the right side The projection area 235 is located rearward with respect to the front curved surface portion 221. The leftward projection region 234 and the rightward projection region 235 are positioned closer to the display unit 240 than the front curved surface portion 221 by providing the step portions 226a and 226b.

  In each of the step portions 226a and 226b, the respective edge portions located at both ends in the front-rear direction respectively form bent portions 227a to 227b. The bent portion 227a provided in the step portion 226a is connected to the side curved surface portion 224, and the side curved surface portion 224 is bent by about 70 degrees in the width direction with respect to the step portion 226a. . The bent portion 227b is connected to the front curved surface portion 221, and the step portion 226a is bent in the front-rear direction by about 90 degrees with respect to the front projection region 231.

  Similarly, the bent portion 227c provided in the step portion 226b is connected to the side curved surface portion 225, and the side curved surface portion 225 is bent by about 70 degrees in the width direction with respect to the step portion 226b. I am doing it. The bent portion 227 d is connected to the front curved surface portion 221, and the step portion 226 b is bent by about 90 degrees with respect to the front projection region 231 in the front-rear direction.

  Light shielding portions 228a to 228d corresponding to the light shielding portions 28a and 28b (see FIG. 2) of the first embodiment are provided in the back surface area of the bent portions 227a to 227b, respectively. Each light shielding portion 228a to 228d covers the back surface area of each of the bent portions 227a to 227b to block the incidence of external light on the bent portions 227a to 227b, and each bent portion 227a to 227b resulting from the incidence of the external light Light emission is suppressed.

  The display unit 240 has one liquid crystal panel 245. The liquid crystal panel 245 serves as the liquid crystal panels 45 to 47 of the first embodiment, and has a posture in which the display surface 241 faces the front projection area 231, the left projection area 234, and the right projection area 235. is set up. The display surface 241 can emit the light of the image 70 toward the front projection area 231, the left projection area 234, and the right projection area 235, respectively. The liquid crystal panel 245 controls the display on the display surface 241 so as not to project the light of the image 70 on the step portions 226a and 226b which are out of the projection areas 231, 234 and 235, respectively.

  Also in the second embodiment described so far, the HUD device 200 can display various virtual images 60 with different imaging positions by achieving the same effect as the first embodiment. Therefore, the HUD device 200 can perform a virtual image display that the driver D can appropriately notice.

  In addition, in the second embodiment, by forming the step portions 226a and 226b in the combiner 220, the optical path distance from the display surface 241 to the front projection area 231, and from the display surface 241 to the left and right projection areas 234 and 235. The difference with the optical path distance of According to the above, it is possible to provide a clearer difference in imaging position between the distant virtual image 61 and the left virtual image 64 and the right virtual image 65.

  In the second embodiment, the left projection area 234 and the right projection area 235 are inclined with respect to the front projection area 231 so as to surround the periphery of the display unit 240. Therefore, the optical axes of light incident from the liquid crystal panel 245 to the leftward projected region 234 and the rightward projected region 235 can be defined in a posture that does not cause significant distortion in the leftward virtual image 64 and the rightward virtual image 65. Therefore, since the HUD device 200 can project the light of the image 70 onto a plurality of projection areas 231, 234 and 235 with one liquid crystal panel 345 while securing the display quality of the virtual image 60, a compact physique can be maintained.

  In the second embodiment, the combiner 220 corresponds to a “projection member”, the front curved surface portion 221 and the side curved surface portions 224 and 225 correspond to a “curved surface portion”, and the bent portions 227a to 227d are “connection portions”. It corresponds to In addition, the leftward projection area 234 and the rightward projection area 235 correspond to the “lateral projection area”, and the display unit 240 corresponds to the “display”.

Third Embodiment
The HUD device 300 of the third embodiment shown in FIG. 7 is a modification of the second embodiment. The HUD device 300 according to the third embodiment includes a combiner 320 having a plurality of projection areas 330, as a configuration corresponding to the combiner 220 (see FIG. 5) of the second embodiment. From the combiner 320, the structure equivalent to each level difference part 226a, 226b of 2nd embodiment and each light-shielding part 228a-228d (refer FIG. 6) is abbreviate | omitted. The combiner 320 has an upper curved surface portion 321, a lower curved surface portion 323, and side curved surface portions 324, 325 having mutually different curvatures, and is formed in a smooth partial spherical shape as a whole. The combiner 320 is disposed above the meter hood 11 with the concave inner surface facing the driver's seat side.

  A far projection area 331, a near projection area 333, a left projection area 334, and a right projection area 335 are defined in the curved surface portions 321, 323, 324, and 325, respectively. The light of the image 70 is projected by the display unit 240 on these projection areas 331, 333, 334, and 335. The far projection area 331, the near projection area 333 and the left projection area 334 or the right projection area 335 are concave mirrors having different magnifications depending on the shapes of the curved surface portions 321 and 323 to 324 different from each other in curvature. Function.

  The far projection area 331 and the near projection area 333 are located in front of the driver D (see FIG. 6). The far projection area 331 is defined above the near projection area 333 in the combiner 320 and has a larger magnification than the near projection area 333. The far virtual image 61 is displayed by the light of the image 70 projected to the far projection area 331, and the near virtual image 63 is displayed closer to the combiner 320 than the far virtual image 61 by the light of the image 70 projected to the near projection area 333. Ru.

  The left projection area 334 and the right projection area 335 are defined in the combiner 320 on the left and right of the far projection area 331 and the near projection area 333. The enlargement factors of the leftward projection area 334 and the rightward projection area 335 are substantially the same as each other, smaller than the enlargement factor of the far projection area 331, and larger than the enlargement factor of the near projection area 333. The left virtual image 64 and the right virtual image 65 are displayed at a distance between the far virtual image 61 and the near virtual image 63 by the light of the image 70 projected to the left projection region 334 and the right projection region 335.

  Also in the third embodiment described so far, the HUD device 300 can display various virtual images 60 with different imaging positions by achieving the same effects as the first embodiment. Therefore, the HUD device 300 can perform virtual image display that the driver can appropriately notice.

  In the third embodiment, the combiner 320 corresponds to a “projection member”, and the upper curved surface 321, the lower curved surface 323, and the side curved surfaces 324 and 325 correspond to “curved surface”. Further, the far projection area 331 corresponds to the “upper projection area” and the “front projection area”, and the near projection area 333 corresponds to the “lower projection area” and the “front projection area”. The leftward projected area 334 and the rightward projected area 335 correspond to "lateral projected areas".

(Other embodiments)
Although a plurality of embodiments have been described above, the present disclosure is not construed as being limited to the above embodiments, and may be applied to various embodiments and combinations without departing from the scope of the present disclosure. it can.

  In the above embodiment, a difference is provided in the distance from each projection area to each imaging position by the configuration in which different magnification ratios are set to each projection area. However, differences in the distance from each projection area to each imaging position may be provided by adopting a configuration in which a stepped portion is provided in one combiner after making the magnification ratio of each projection area substantially the same. Alternatively, with the configuration in which the plurality of combiners are arranged at different distances from one display surface after making the magnification ratio of each projection region substantially the same, a difference is provided in the distance from each projection region to each imaging position May be

  In the above embodiment, three or more projection areas are defined in the combiner or the combiner unit. However, the number of projection areas defined in the projection member can be appropriately changed as long as it is two or more. In addition, in the case where three or more projection areas are defined in the projection member, projection areas for forming virtual images at the same distance are provided, such as leftward projection area and rightward projection area. May be

  In the embodiment described above, among the plurality of projection areas arranged in the vertical direction, the projection area located above the projection area located below has the virtual image formed far. However, if the projection member such as the combiner is suspended from the ceiling of the vehicle A, for example, the projection area located below the projection area located above may form a virtual image at a distance.

  In the above embodiment, a projector in which a liquid crystal panel and a projection light source are combined is used as a display for emitting light of an image. However, the configuration of the display can be changed as appropriate. For example, a DLP (Digital Light Processing (registered trademark)) projector having a digital micro device (DMD) having a large number of micro mirrors and a projection light source for projecting light toward the DMD can be adopted as a display. . Furthermore, a laser scanner having a micro electro mechanical systems (MEMS) mirror and a laser light source for projecting light toward the MEMS mirror can be employed as the display.

  In the above embodiment, the light of the image emitted from the display is directly incident on each projection area. However, in order to expand the optical path distance from the display surface to each projection area, an optical system including one or more concave mirrors or plane mirrors or lenses for refracting light of an image is provided in the housing. Good.

  The display control device 88 in the above embodiment may be a dedicated control circuit that controls virtual image display of the HUD device. Alternatively, the control circuit of another in-vehicle device mounted on the vehicle A may also have the function of the display control device 88. For example, a control circuit provided in the combination meter can control a virtual image display of the HUD device together with the display of the meter. Alternatively, an HCU (Human Machine Interface) control unit (HCU) that integrally controls information presentation to the driver may double as the function of the display control device 88. Furthermore, the control circuit of the portable terminal brought into the vehicle compartment by the driver may also have the function of the display control device 88.

  In the vehicle A as in the above embodiment, the eye relief ELP (see FIG. 3) can be set for each of the right eye and the left eye based on the eye range that statistically represents the distribution of the driver's eye position is there. It is desirable for the HUD device to display each virtual image so as to be visible by a driver who places the left and right eyes in the eyelid ELP. In addition, the characteristic configuration of the present disclosure is also applicable to a HUD device mounted on various types of moving objects (transportation devices) such as ships and aircraft other than vehicles.

A vehicle (moving body), D driver (passenger), 13 windshield, 20 combiner unit (projection member), 220, 320 combiner (projection member), 21, 321 upper curved surface portion (curved surface portion), 221 front curved surface portion (Curved surface portion), 22 intermediate curved surface portion (curved surface portion), 23, 323 lower curved surface portion (curved surface portion), 24, 25, 224, 225, 324, 325 side curved surface portion (curved surface portion), 26a, 26b connection portion 226a and 226b Stepped part 227a to 227d Bent part (connection part) 28a, 28b and 228a to 228d Light shielding part 30, 230, 330 Projection area 31, 331 Far projection area (Upper projection area, Front projection area) , 231 front projection area, 32 middle projection area (front projection area), 33, 333 near projection area (upper Shadow area, front projection area), 34, 234, 334 left projection area (side projection area), 35, 235, 335 right projection area (side projection area), 40, 240 display unit (display), 41 central display surface (display surface), 42 left display surface (display surface), 43 right display surface (display surface), 60 virtual images, 70 images, 100, 200, 300 HUD devices (head-up display devices)

Claims (7)

A head-up display device mounted on a mobile unit (A) and displaying a virtual image (60) visible by an occupant (D) of the mobile unit,
Display for emitting light of an image (70) to be imaged as the virtual image and (2 40),
The projection unit has a plurality of projection areas (2 3 0) which are provided separately from the windshield (13) of the movable body and light of the images different from one another is projected by the display, and is projected onto each of the projection areas A projection member ( 220) for imaging the light of each of the determined images at imaging positions at different distances from each of the projection areas ;
Said projection member is between two of said projection areas adjacent to each other, the step portion forming the step along the incident direction of light incident to each of said projection area (226a, 226b) head-up display apparatus that have a . In the plurality of projection areas, there are a front projection area (2 3 1) located in front of the occupant and a side projection area (2 3 4 2 3 5) located on the side of the front projection area. Included
2. The head-up display device according to claim 1, wherein the side projection area is inclined toward the occupant side as it is separated from the front projection area in the width direction of the movable body. A head-up display device mounted on a mobile unit (A) and displaying a virtual image (60) visible by an occupant (D) of the mobile unit,
A display (40, 240) for emitting light of the image (70) formed as the virtual image;
The projection area (30, 230, 330) has a plurality of projection areas (30, 230, 330) which are provided separately from the windshield (13) of the movable body and light of the different images are projected by the display. A projection member (20, 220, 320) for imaging the light of each of the images projected onto the light source at imaging positions different in distance from each of the projection regions ;
In the plurality of projection areas, a front projection area (31 to 33, 231, 331, 333) located in front of the occupant and a side projection area (34, 35, 234, 235, 334, 335) and
Said lateral projection region, with the distance from the front projection area along the width direction of the movable body, tilted head-up display device Ru posture der to the occupant side. The projection member has a plurality of curved surface portions (21 to 25, 221, 224, 225, 321, 323 to 325) formed in a concave shape,
The projection area is defined in each of the curved surface portions,
The head up display device according to any one of claims 1 to 3, wherein the curvatures serving as the reference in each of the curved surface portions are different from each other. The plurality of projection areas include an upper projection area (31, 331) and a lower projection area (33, 333) aligned in the vertical direction of the movable body in a stationary state;
The head-up display device according to any one of claims 1 to 4, wherein the upper projection area focuses light of the image farther than the lower projection area. The display (40) has a plurality of display surfaces (41 to 43) for emitting the light of the image toward the different projection areas.
The head-up display device according to any one of claims 1 to 5, wherein the distance of each light path from each display surface to each projection area where the light of the image is projected by each display surface is different from each other. .   The head-up display device according to any one of claims 1 to 6, wherein the projection member defines two adjacent projection areas apart from each other.

Images