JP5288037B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device.

  Conventionally, there is a projector device disclosed in Patent Document 1 as an example of a vehicle display device used in a vehicle interior.

  A projector device disclosed in Patent Document 1 includes a rail member attached to a ceiling side, a projection-type liquid crystal projector provided so as to be movable in the front-rear direction along the rail member, and a movement amount of the liquid crystal projector. The lens driving mechanism for moving the lens of the liquid crystal projector back and forth, the lens adjusting mechanism for moving only the lens back and forth when the liquid crystal projector is stopped, and the screen disposed in front of the liquid crystal projector. Thereby, the screen size of the screen can be freely changed, and at the same time, the screen can be automatically focused. Accordingly, it is possible to freely adjust the size of the screen displayed on the screen so that it can be easily seen.

JP 7-154723 A

  By the way, the vehicle may have passengers in the passenger seat and the rear seat in addition to the driver. In addition, when driving a vehicle, the driver does not always look straight ahead, but when turning the vehicle to the right or left, looking at the right or left side of the vehicle or moving the vehicle backward Is to look behind the vehicle. Therefore, it is preferable that the vehicular display device display images at a plurality of places, not only at one place in the vehicle interior.

  On the other hand, although the projector apparatus shown by patent document 1 can change the size of the image projected on a screen freely by moving a liquid crystal projector to the front-back direction along a rail member, Images could not be displayed at multiple locations in the passenger compartment with a liquid crystal projector.

  It is also conceivable to install displays at a plurality of locations in the passenger compartment. However, when displays are installed at a plurality of locations in the vehicle interior, not only the installation space is increased, but there are problems such as generation of electromagnetic noise, increased wiring, and increased vehicle weight.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle display device capable of displaying images at a plurality of locations in a vehicle compartment in a space-saving manner while suppressing power supply noise. .

  In order to achieve the above object, a vehicle display device according to claim 1 is provided in a vehicle interior and displays an image by projecting light, and includes a mirror portion and a mirror portion formed on a semiconductor substrate. And a projector including a scanning unit including an actuator unit that drives the light source unit and a light source unit that irradiates light to the mirror unit, and an image from one projector is displayed in any of a plurality of regions in the vehicle interior. Display driving means for operating the projector and a rotation angle sensor for detecting the rotation angle of the steering wheel, and the display driving means changes the region for displaying an image in accordance with the driver's line-of-sight direction. As the driver's line-of-sight direction, the image display area is changed according to the detection result of the rotation angle sensor. When the rotation angle of the steering wheel exceeds 90 °, an image by the projector is displayed on the door on the passenger seat side, the side glass on the passenger seat side, or the pillar on the rotation direction side of the steering wheel. is there.

  Thus, a projector including a scanning unit including a mirror unit formed on a semiconductor substrate and an actuator unit that drives the mirror unit, and a light source unit that irradiates light to the mirror unit is provided. It is possible to save space by displaying images in a plurality of areas in the vehicle interior. Moreover, since only one projector is used, wiring can be reduced and power supply noise can be suppressed. Further, since the projector as described above has a lighter weight per unit area to be displayed than a liquid crystal display or the like, an increase in the vehicle weight due to the vehicle display device can also be suppressed.

  Moreover, when displaying the image by one projector in any one of a plurality of regions in the passenger compartment, the region for displaying the image is changed according to the driver's line-of-sight direction as shown in claim 1. Operate the projector.

  As described above, it is preferable to display the image in a direction that is easy for the driver to see by displaying the image in the direction of the driver's line of sight, that is, the direction that the driver views when turning the vehicle to the left or right.

  According to another aspect of the present invention, a rotation angle sensor for detecting the rotation angle of the steering wheel is provided, and the display driving means displays an image as the driver's line-of-sight direction according to the detection result of the rotation angle sensor. Change the area.

  For example, when the vehicle is turned right or left, the driver's line of sight often corresponds to the rotation angle of the steering wheel. Therefore, according to the first aspect, an image can be displayed in the direction of the driver's line of sight.

  Note that the steering wheel rotates 90 ° or more on both the left and right sides. Moreover, the image displayed according to a driver | operator's gaze direction is an image etc. which show the periphery information etc. of a vehicle, for example.

  Therefore, as shown in claim 1, when the rotation angle of the steering wheel exceeds 90 °, the display driving means has an end portion on the rotation direction side of the steering wheel in the windshield or the rotation direction side of the steering wheel. You may make it display the image by a projector on a pillar.

  By doing in this way, even if the steering wheel is rotated 90 ° or more to the left or right, an image can be displayed at a position close to the driver's line-of-sight direction.

  Moreover, when changing the area | region which displays an image according to a driver | operator's eyes | visual_axis direction, as shown in Claim 2, a driver | operator is taken from the image imaged by the imaging means which images a driver | operator's face, and an imaging means. And a line-of-sight detection device that detects the line-of-sight direction, and the display driving means may change an area for displaying an image in accordance with the line-of-sight direction of the driver detected by the line-of-sight detection device.

  In this way, by detecting the driver's line-of-sight direction from the image captured by the imaging means, and changing the area in which the image is displayed according to the detection result, the driver's line-of-sight direction is more appropriately set. Accordingly, an image can be displayed.

  According to a third aspect of the present invention, the position sensor for detecting the position of the shift lever is provided, and the display driving means changes the region for displaying an image as the driver's line-of-sight direction according to the position detection result. You may do it.

  For example, when the vehicle is moved backward, the driver's line-of-sight direction often corresponds to the position of the shift lever. Therefore, according to the third aspect, an image can be displayed in the direction of the driver's line of sight.

  According to a fourth aspect of the present invention, there is provided an operation unit that is operated by an occupant and outputs an instruction signal for instructing an area in which an image is displayed by the projector, and the display driving unit is configured according to the instruction signal. You may make it operate a projector so that the area | region which displays an image may be changed.

  This is preferable because an image can be displayed in an area that the occupant wants to display.

  Moreover, as shown in claim 5, the projector may be arranged on a ceiling in the vehicle interior.

  The ceiling often has no other in-vehicle appliances or wiring, compared to the center console or instrument panel. Therefore, it is preferable to dispose the projector on the ceiling in this way because it has little influence on other in-vehicle appliances.

  According to a sixth aspect of the present invention, a rail extending at least in the traveling direction of the vehicle may be provided on the ceiling of the vehicle interior, and the projector may be arranged so as to be movable on the rail.

  By doing in this way, since an image can be easily displayed also in the front and back of a vehicle interior, it is preferable.

  According to a seventh aspect of the present invention, the projector rolls on a rail and may be provided in a ball having a projection window through which light projected from the projector passes.

  In order to achieve the above object, the vehicle display device according to claim 8 is provided at a portion of the steering wheel of the vehicle facing the windshield, and displays an image by projecting light. A projector including a mirror unit formed on a semiconductor substrate and an actuator unit that drives the mirror unit, a projector including a light source unit that emits light to the mirror unit, and a rotation angle of the steering wheel is detected A rotation angle sensor and an angle adjustment unit that adjusts the projection angle of the projector according to the detection result of the rotation angle sensor are provided.

  Thus, a projector including a scanning unit including a mirror unit formed on a semiconductor substrate and an actuator unit that drives the mirror unit, and a light source unit that irradiates light to the mirror unit is provided. By providing in, the image can be displayed in a plurality of areas in the vehicle interior in conjunction with the steering wheel. Therefore, since one projector can display images in a plurality of areas, space can be saved. Moreover, since only one projector is used, wiring can be reduced and power supply noise can be suppressed. Furthermore, since the projector as described above is lighter than a liquid crystal display or the like, an increase in vehicle weight due to the vehicle display device can also be suppressed.

  Furthermore, by providing the projector on the steering wheel, the projector moves in conjunction with the steering wheel. Therefore, an image can be displayed at a position corresponding to the rotation angle of the steering wheel. That is, when the vehicle is turned left or right, the driver's line-of-sight direction often corresponds to the rotation angle of the steering wheel. Therefore, an image can be displayed in the direction of the driver's line of sight (the direction that the driver sees when turning the vehicle right or left).

  According to a ninth aspect of the present invention, the projector is installed inside the steering wheel, and the steering wheel has a projection window that allows light projected from the projector to pass through a portion facing the windshield. May be.

  Since the steering wheel is limited in space, other in-vehicle appliances and wiring are often not arranged compared to the center console and instrument panel. Therefore, by making it as shown in Claim 9, there is little influence on other vehicle-mounted electrical appliances etc., and it is suitable.

  Note that the steering wheel rotates 90 ° or more on both the left and right sides. Therefore, when the steering wheel rotates 90 ° or more to the left or right, there is a possibility that the projector that moves in conjunction with the steering wheel cannot display an image at an appropriate position.

  Therefore, as shown in claim 10, the projector rotates with the steering wheel until the rotation angle of the steering wheel reaches 90 ° to the left or right, and when the rotation angle exceeds 90 °, the steering wheel The rotation angle may be fixed at the 90 ° position until it returns to the 90 ° position.

  This is preferable because an image can be displayed in the direction in which the driver is facing even when the steering wheel is rotated 90 ° or more to the left or right.

It is an image figure showing a schematic structure of a display for vehicles in a 1st embodiment of the present invention. It is an image figure which shows the example of arrangement | positioning of the screen near the driver's seat (windshield) of the display apparatus for vehicles in the 1st Embodiment of this invention. It is an image figure which shows the example of arrangement | positioning of the screen of the passenger seat vicinity of the display apparatus for vehicles in the 1st Embodiment of this invention. It is an image figure which shows the example of arrangement | positioning of the screen of the back glass vicinity of the display apparatus for vehicles in the 1st Embodiment of this invention, (a) is a side view, (b) is a top view. It is an image figure which shows the example of arrangement | positioning of the screen for the rear seats of the display apparatus for vehicles in the 1st Embodiment of this invention. It is a top view which shows schematic structure of the scanning part of the projector of the display apparatus for vehicles in the 1st Embodiment of this invention. It is an image figure which shows the display principle by the projector of the display apparatus for vehicles in the 1st Embodiment of this invention. It is a top view which shows schematic structure of the rail provided in the ceiling in the 1st Embodiment of this invention. It is sectional drawing which shows schematic structure of the rail provided in the ceiling in the 1st Embodiment of this invention. It is a top view which shows schematic structure of the rail provided in the ceiling in the modification 1 of the 1st Embodiment of this invention. It is drawing which shows schematic structure of the projector provided in the ceiling in the modification 2 of the 1st Embodiment of this invention, (a) is sectional drawing, (b) is seeing through when it sees from a vehicle interior FIG. It is an image figure which shows the example of arrangement | positioning of the screen and projector of a vehicle display apparatus in the 2nd Embodiment of this invention. It is a side view which shows the example of arrangement | positioning of the projector of the display apparatus for vehicles in the 2nd Embodiment of this invention. It is a perspective view of the steering wheel which shows schematic structure of the projector of the display apparatus for vehicles in the modification 1 of the 2nd Embodiment of this invention. It is a perspective view of the steering wheel which shows schematic structure of the projector of the display apparatus for vehicles in the modification 2 of the 2nd Embodiment of this invention. It is an image figure which shows the example of arrangement | positioning of the screen of the display apparatus for vehicles in the modification 3 of the 2nd Embodiment of this invention, and a projector. It is a side view which shows the example of arrangement | positioning of the projector of the display apparatus for vehicles in the modification 3 of the 2nd Embodiment of this invention. It is an image figure which shows an example of the display part of the display apparatus for vehicles in other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, the first embodiment will be described. FIG. 1 is an image diagram showing a schematic configuration of a vehicle display device according to a first embodiment of the present invention. FIG. 2 is an image diagram showing an example of an arrangement of screens in the vicinity of the driver's seat (windshield) of the vehicle display device according to the first embodiment of the present invention. FIG. 3 is an image diagram showing an example of the arrangement of the screen in the vicinity of the passenger seat of the vehicle display device according to the first embodiment of the present invention. FIG. 4 is an image diagram showing an example of the arrangement of the screen near the back glass of the vehicle display device according to the first embodiment of the present invention, (a) is a side view, and (b) is a plan view. . FIG. 5 is an image diagram showing an arrangement example of a screen for a rear seat of the vehicle display device according to the first embodiment of the present invention. FIG. 6 is a plan view showing a schematic configuration of a scanning unit of the projector of the vehicle display device according to the first embodiment of the present invention. FIG. 7 is an image diagram showing a display principle by the projector of the vehicle display device according to the first embodiment of the present invention. FIG. 8 is a plan view showing a schematic configuration of a rail provided on the ceiling according to the first embodiment of the present invention. FIG. 9 is a cross-sectional view showing a schematic configuration of rails provided on the ceiling according to the first embodiment of the present invention.

  As shown in FIG. 1, the display apparatus for vehicles in this Embodiment displays an image on several area | regions (screen 51,52,53,54a, 54b, 55,56) with one projector 40. As shown in FIG. . That is, the vehicle display device displays the projected image on any one of the screens 51, 52, 53, 54 a, 54 b, 55, 56 by moving the projector 40 along the rails 61, 62. is there. A transparent screen or the like that can display a projection image from the projector 40 can be employed.

  As shown in FIG. 2, the screen 51 is for the driver and is provided on the pillar on the driver's seat S1 side. As shown in FIG. 2, the screen 52 is for a driver or a passenger in a passenger seat, and is provided on the surface of the windshield FG. As shown in FIG. 3, the screen 53 is for visually recognizing the left side of the driver, and is provided on the door on the passenger seat S2 side. Note that there is a possibility that an occupant is sitting on the passenger seat S2. In this case, the driver may not be able to see the screen 53 provided on the door on the passenger seat S2 side. Therefore, the screen 53 may be provided on the side glass SG on the passenger seat S2 side.

  In this way, by providing the screen 53 on the door on the passenger seat S2 side or on the side glass SG on the passenger seat S2 side, the driver can easily see the image when viewing the left side. As an image displayed on the screen 53, a captured image of the left side surface outside the vehicle can be employed. By displaying the captured image of the left side surface outside the vehicle on the screen 53 in this way, the driver can easily imagine the state of the left side surface of the vehicle.

  As shown in FIGS. 4A and 4B, the screens 54a and 54b are for visually recognizing the driver's rear, and are provided on the surface (54b) of the back glass BG or around the back glass BG (54a). It is done. For example, as an image to be displayed on the screens 54a and 54b, it is possible to employ a rear captured image outside the vehicle and alert information at the time of rear confirmation.

  As shown in FIG. 5, the screens 55 and 56 are for the rear seats, and are provided on the backrest of the front seats (driver seat S1 and passenger seat S2) and on the ceiling, as seen from the side of the vehicle. In this case, it is arranged at almost the same position as the driver's head. The screens 55 and 56 are of a rear projection type (light enters from the rear). The screen 55 is for the left rear seat S4, and the screen 56 is for the right rear seat S3.

  The rails 61 and 62 are provided on the ceiling 70 of the vehicle as shown in FIG. 1 or FIG. Rail 61 is provided so as to extend in the traveling direction of the vehicle. The rail 62 is provided so as to be orthogonal to the rail 61 between the front seat (driver seat S1 and passenger seat S2) and the rear seat (right rear seat S3 and left rear seat S4).

  As shown in FIG. 9, the rail 61 has a groove shape provided such that the bottom communicates with the vehicle interior. Since the same applies to the rail 62, the description thereof is omitted. The ball 40a in which the projector 40 is built is disposed in this groove in a movable state. The ball 40a is provided with a projection window 40a1 that allows light emitted from the mirror unit 13 of the projector 40 to pass into the vehicle interior, and the rails 61 and 62 can be moved by a motor or the like (display driving means). The ball 40a is rotatable without the rails 61 and 62 (display driving means). When a projected image is displayed on any one of the screens 51, 52, 53, 54a, 54b, 55, 56, the ball 40a is moved to a desired position along the rails 61 and 62, and the ball 40a is rotated. By adjusting the angle, the angle of the light emitted from the projector 40 is adjusted.

  The power supply and signal supply to the projector 40 can be performed, for example, wirelessly or through a contact point between the rail 61 and the projector 40. Further, the projector 40 may be suspended like a monorail.

  As a first modification, as shown in FIG. 10, a mirror M that rotates in a circular shape is provided below the ball 40a. And you may make it adjust the angle (irradiation angle) of the light irradiated from the projector 40 using the rotation angle of the ball | bowl 40a, and the rotation angle of the mirror M. FIG.

  As described above, by using the rails 61 and 62, even if a blind spot is formed between the projector 40 and the screen due to a luggage or a passenger, the influence of the blind spot is affected by moving the position of the projector 40. The display can be reduced. This is preferable because images can be easily displayed in front and rear of the passenger compartment.

  Here, the two-dimensional scanner 10 of the projector 40 in the present embodiment will be described with reference to FIG.

  The two-dimensional scanner 10 includes each component formed by etching a semiconductor substrate and a piezoelectric element formed on the surface of the piezoelectric diaphragm. The two-dimensional scanner 10 has a circular mirror portion 13 having a reflective film on the surface at the center.

  First torsion bars 14a and 14b on an axis Y2 passing through the center of the mirror part 13 pivotally support the mirror part 13 at one end of each. On both sides of the first torsion bars 14 a and 14 b, semicircular first piezoelectric diaphragms 15 a and 15 b are connected and arranged so as to surround the mirror unit 13. Semicircular piezoelectric elements are formed on the surfaces of the first piezoelectric diaphragms 15a and 15b.

  Around the first piezoelectric diaphragms 15a and 15b, an annular inner movable frame 12 connected to the first piezoelectric diaphragms 15a and 15b on the X2 axis intersecting the Y2 axis is formed. In other words, each intermediate portion of the first piezoelectric diaphragm is connected to the internal movable frame 12. One ends of the second torsion bars 16a and 16b on the X2 axis support the internal movable frame 12. The support 11 is connected to the other ends of the second torsion bars 16a and 16b.

  Semicircular second piezoelectric diaphragms 17 a and 17 b are arranged between the support 11 and the inner movable frame and surround the inner movable frame 12. The second piezoelectric diaphragms 17a and 17b connect the second torsion bars 16a and 16b and the support 11 on the Y2 axis. In other words, each intermediate portion of the second piezoelectric diaphragm is connected to the support 11. A semi-circular piezoelectric element is formed on the surfaces of the second piezoelectric diaphragms 17a and 17b. In the configuration in FIG. 6, the X2 axis and the Y2 axis are orthogonal.

  The piezoelectric element on the first piezoelectric diaphragm 15a (and 15b) is connected to the lead electrode 15ap (and 15bp) formed on the support 11 by wiring, and supplies a voltage from the outside through the lead electrode. Can do. Also for the piezoelectric elements on the second piezoelectric diaphragm 17a (and 17b), a voltage can be supplied from the outside through the extraction electrode 17ap (and 17bp) formed on the support 11.

  The second torsion bars 16a and 16b are processed on a part of the support 11 and the internal movable frame 12 to make the internal movable frame 12 described later easier to swing, and have a longer rotation shaft. Similarly, the first torsion bars 14a and 14b can also be made longer in length by rotating the mirror portion 13. Further, the first torsion bar may be structured to connect the mirror unit 13 and the internal movable frame 12.

  The operation of the two-dimensional scanner 10 will be described. When AC voltages VX3 (and VX4) having different phases (preferably opposite phases) are applied to the piezoelectric elements of the second piezoelectric diaphragm 17a (and 17b) by the wiring (single line) shown in FIG. Shrink in the circumferential direction. Even when the piezoelectric element contracts, the length of each piezoelectric diaphragm does not change, and a part of the piezoelectric diaphragm is held by the support 11, so that the piezoelectric diaphragm is pulled up to the piezoelectric element side. When the voltage decreases, the contracted piezoelectric element tries to return to its original length. Along with this, the piezoelectric diaphragm also tries to return. When the applied voltage is 0 V, the piezoelectric diaphragm returns to the original position, although there is some overshoot. Thus, by applying a biased AC voltage, the piezoelectric diaphragm vibrates in the thickness direction. In particular, when the phase of the voltage applied to the piezoelectric elements of the piezoelectric diaphragms 17a and 17b is opposite, the vibration direction of the piezoelectric diaphragm 17a (and 17b) is reversed about the torsion bar 16a (and 16b).

  At this time, rotational torque acts on the inner movable frame 12 through the torsion bars 16a and 16b, and the inner movable frame 12 is tilted about the torsion bars 16a and 16b. When the AC voltages VX3 and VX4 are continuously applied, a seesaw-like rotational torque acts on the inner movable frame 12, and the inner movable frame 12 swings around the X2 axis at a predetermined angle. Such oscillation is possible even when the AC voltage applied to the piezoelectric element is not opposite in phase between 16a and 16b.

  By applying an AC voltage to the piezoelectric elements on the first piezoelectric diaphragms 15a and 15b on the same principle to vibrate the piezoelectric diaphragms 15a and 15b, a Y2 axis (X2) passing through the first torsion bars 14a and 14b is obtained. The mirror portion 13 swings at a predetermined angle around the axis. By applying a predetermined AC voltage to the piezoelectric elements of the first piezoelectric diaphragms 15a and 15b and the second piezoelectric diaphragms 17a and 17b, the internal movable frame 12 and the mirror unit 13 intersect with each other in the X2 axis and the Y2 axis. Since each of them swings around, the reflected light of the light incident on the reflection film on the surface of the mirror unit 13 is scanned two-dimensionally.

  Using such a two-dimensional scanner 10, as shown in FIG. 7, light from a semiconductor laser 21 (similarly to the semiconductor lasers 22 and 23) is scanned two-dimensionally. Then, the scanned laser light forms an image on the screen 51 (the same applies to other screens) through the lens 30. The projector 40 forms (projects) an image by causing the semiconductor lasers 21 to 23 to emit light based on a signal from a control ECU (not shown) or the like and operating the two-dimensional scanner 10. Further, the projector 40 using such a two-dimensional scanner 10 and the semiconductor laser 21 can be miniaturized to such an extent that it can be stored in a box of about 40 mm × 25 mm × 8 mm, for example. Note that the box in which the projector 40 is placed is provided with a projection window or the like that allows light emitted from the projector 40 to pass into the vehicle interior.

  Here, a description will be given of which of the screens 51, 52, 53, 54a, 54b, 55, and 56 displays the image by the projector 40.

  For example, an amusement image such as a television image or a DVD is displayed on one of the screens 52, 55, and 56 because the passenger in the passenger seat S2 and the passengers in the rear seats S3 and S4 often view it. In this case, the occupant can select which of the screens 52, 55, and 56 is displayed. That is, although not shown in the figure, an operation device is provided that is operated by the occupant and outputs an instruction signal that instructs an area in which the projector 40 displays an image. The ball motor incorporating the projector 40 moves the ball near the screen instructed based on the instruction signal and / or the projection window 40a1 toward the screen instructed based on the instruction signal. Rotate so that is facing. Then, the control ECU outputs a signal to the projector 40 in order to display an image corresponding to the occupant's instruction. The projector 40 forms (projects) an image by causing the semiconductor lasers 21 to 23 to emit light based on a signal from the control ECU and operating the two-dimensional scanner 10.

  This is preferable because an image can be displayed on a screen (area) that the occupant wants to display. Moreover, when displaying an image on the screen 52, it is preferable to make it a size that is easy to see from the rear seats S3 and S4.

  Further, for example, an image (information) captured by a camera that monitors the periphery of the vehicle is often viewed by the driver, and is therefore displayed on one of the screens 51, 52, 53, 54a, and 54b. In this case, the occupant can select which of the screens 51, 52, 53, 54a, and 54b is displayed in the same manner as described above. In addition, a rotation angle sensor (not shown) for detecting the rotation angle of the steering wheel H and a position sensor (not shown) for detecting the position of the shift lever are provided, and selected according to the rotation angle of the steering wheel H or the position of the shift lever. You may make it do. Note that the rotation angle sensor and the position sensor are well-known techniques, and thus description thereof is omitted.

When the vehicle is turned left or right, the driver's line-of-sight direction often corresponds to the rotation angle of the steering wheel H. Further, when the vehicle is moved backward, the driver's line-of-sight direction often corresponds to the position of the shift lever. Therefore, an image can be displayed in the direction of the driver's line of sight by selecting the turning angle (rotation angle) of the steering wheel H or the position of the shift lever.

  In this case, the motor of the ball 40a in which the projector 40 is built moves the ball 40a near the screen at an appropriate position and / or receives the instruction signal according to the detection result from the rotation angle sensor or the position sensor. The projection window 40a1 is rotated so as to face the screen instructed based on the screen. Then, the control ECU outputs a signal to the projector 40 in order to display an image corresponding to the occupant's instruction. The projector 40 forms (projects) an image by causing the semiconductor lasers 21 to 23 to emit light based on a signal from the control ECU and operating the two-dimensional scanner 10. The control ECU may output an instruction signal to the motor according to the detection result from the rotation angle sensor or the position sensor.

  The screen at an appropriate position according to the detection result from the rotation angle sensor or the position sensor is, for example, when a signal indicating that the steering wheel H is rotated to the left is output from the rotation angle sensor (left turn) Etc.) is the screen 53, and when a signal indicating that the steering wheel H is rotated to the right is output from the rotation angle sensor (such as turning right), the screen 51 is used to rotate the steering wheel H from the rotation angle sensor. When the signal indicating that the shift lever is not operated (straight) is the screen 52, and when the signal indicating that the shift lever is in the reverse position is output from the position sensor (reverse), the screen 54a or 54b is output. is there.

  Note that the steering wheel H rotates by 90 ° or more on both the left and right sides. Further, when the steering wheel H rotates 90 ° or more to the left or right, the vehicle is considerably decelerated. Therefore, when the steering wheel H is rotated 90 ° or more to the left or right, there is often no problem even if the image as described above is not displayed. Therefore, when the rotation angle of the steering wheel H exceeds 90 °, the display of an image by the projector 40 may be stopped. In this case, the control ECU determines whether or not the rotation angle of the steering wheel H exceeds 90 ° based on the detection result from the rotation angle sensor. And when it determines with the rotation angle of the steering wheel H exceeding 90 degrees, the output of the signal for displaying the image with respect to the projector 40 is stopped.

  In the case where the screen is arranged as shown in FIG. 1, an image is displayed on the screen 53 when the steering wheel H is rotated 90 ° or more to the left, and the steering wheel H is rotated 90 ° or more to the right. May display an image on the screen 51.

  In addition, for example, an image showing information necessary for moving the vehicle such as a vehicle speed or an engine speed warning is often viewed by the driver when the vehicle is moving forward. To display. In this case, which of the screens 51, 52, and 53 is displayed can be selected by the occupant according to the rotation angle of the steering wheel H as in the case described above, and is selected in the direction of the driver's line of sight. It is also possible.

  By providing a camera (imaging means) that captures the driver's face and a gaze detection device that detects the gaze direction of the driver by detecting the driver's black eyes and the like from the image captured by the camera, You can detect whether you are watching. Note that such a method and apparatus for detecting the driver's line-of-sight direction are well-known techniques and will not be described.

  In this case, the ball motor incorporating the projector 40 moves the ball near the screen at an appropriate position and / or is instructed based on this instruction signal in accordance with the detection result from the line-of-sight detection device. The projection window 40a1 is rotated toward the screen. Then, the control ECU outputs a signal to the projector 40 in order to display an image corresponding to the occupant's instruction. The projector 40 forms (projects) an image by causing the semiconductor lasers 21 to 23 to emit light based on a signal from the control ECU and operating the two-dimensional scanner 10.

  Note that the screen at an appropriate position according to the detection result from the line-of-sight detection device is, for example, a signal indicating that the driver's line of sight is on the left side (left side with respect to the straight direction of the vehicle) from the line-of-sight detection device. When the signal is displayed, it is the screen 53, and when the signal indicating that the driver's line of sight is on the right side (right side with respect to the straight traveling direction of the vehicle) is output from the line of sight detection device, the screen 51 is displayed. The screen 52 is displayed when a signal indicating that the driver's line of sight is straight (a straight traveling direction of the vehicle) is output.

  Thus, by changing the screen that displays an image according to the driver's line-of-sight direction, the image can be displayed more appropriately according to the driver's line-of-sight direction.

  In the present embodiment, the example using the rails 61 and 62 has been described. However, the present invention is not limited to this. For example, as shown in FIG. 11, the projector 40 may be fixedly provided at one place on the ceiling 70. In this case, a mounting recess 71 for arranging the projector 40 is provided on the ceiling 70. The vehicle interior is irradiated with light emitted from the mirror unit 13 via the lens 30, and the screens 51, 52, 53, 54 a, 54 b, 55 are moved by moving the lens 30 by the lens driving actuator 31. , 56 displays a projected image. In many cases, the ceiling 70 is not provided with other in-vehicle electrical appliances or wirings as compared to the center console or the instrument panel. Therefore, it is preferable to dispose the projector 40 on the ceiling 70 in this manner because it has little influence on other in-vehicle appliances.

  As described above, the two-dimensional scanner including the mirror unit 13 formed on the semiconductor substrate and the actuator unit (the first piezoelectric diaphragms 15a and 15b, the second piezoelectric diaphragms 17a and 17b, etc.) for driving the mirror unit 13 is provided. 10 (scanning unit) and a projector 40 including semiconductor lasers 21 to 23 (light source unit) for irradiating light to the mirror unit 13 are provided. Space can be saved by displaying a crab image. Further, since only one projector 40 is used, wiring can be reduced and power supply noise can be suppressed. Furthermore, since the projector 40 as described above is lighter than a liquid crystal display or the like, an increase in the vehicle weight due to the vehicle display device can also be suppressed.

  In addition, it is preferable to display an image in a position that is easy for the driver to see by displaying an image in the direction of the driver's line of sight, that is, the direction that the driver sees when turning the vehicle left or right or reverse.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. FIG. 12 is an image diagram showing an arrangement example of the screen and the projector of the vehicle display device according to the second embodiment of the present invention. FIG. 13 is a side view showing an arrangement example of the projector of the vehicle display device according to the second embodiment of the present invention. FIG. 14 is a perspective view of the steering wheel showing a schematic configuration of the projector of the vehicle display device in Modification 1 of the second embodiment of the present invention. FIG. 15 is a perspective view of the steering wheel showing a schematic configuration of the projector of the vehicle display device in Modification 2 of the second embodiment of the present invention. FIG. 16 is an image diagram illustrating an arrangement example of the screen and the projector of the vehicle display device according to the third modification of the second embodiment of the present invention. FIG. 17 is a side view illustrating an arrangement example of the projectors of the vehicle display device according to the third modification of the second embodiment of the present invention.

  Since the vehicular display device in the second embodiment is often in common with that in the first embodiment described above, a detailed description of common parts will be omitted, and different parts will be described mainly. . The second embodiment is different from the first embodiment described above in that the projector 40 is mainly provided on the steering wheel H and an image is displayed in a partial area of the windshield FG.

  As shown in FIG. 12, a horizontally long screen 57 (a screen from the position facing the driver seat S1 to the position facing the passenger seat S2) is provided in the lower region of the windshield FG. Then, as shown in FIGS. 12 and 13, the projector 40 is provided on the steering wheel H. As in the above-described embodiment, the projector 40 includes the mirror unit 13 formed on the semiconductor substrate, the actuator unit that drives the mirror unit 13, the first piezoelectric diaphragms 15 a and 15 b, and the second piezoelectric diaphragm 17 a. , 17b, and the like, and semiconductor lasers 21 to 23 (light source units) that irradiate the mirror unit 13 with light. Further, the projector 40 is provided at a portion facing the windshield FG on the surface of the steering wheel H.

  Since the projector 40 is provided on the steering wheel H, the projector 40 is interlocked with the rotation of the steering wheel H (the rotation angle of the steering wheel H). As described above, when the projector 40 is interlocked with the steering wheel H (the rotation angle of the steering wheel H), an image can be displayed in a plurality of regions on the screen 57 in the vehicle interior using the single projector 40. . Therefore, space can be saved.

  However, when the projector 40 is provided on the steering wheel H, the position of the projector 40 moves downward (toward the ground) as the steering wheel H rotates left and right. Therefore, depending on the rotation angle of the steering wheel H, an image from the projector 40 cannot be displayed on the screen 57. Therefore, as shown in FIG. 13, an angle adjustment actuator (angle adjustment means) 40b is provided for adjusting the projection angle of the projector 40 so that the image from the projector 40 is reflected on the windshield FG even when the steering wheel H rotates. . Although the case where the screen 57 is provided on the windshield FG has been described, the screen 57 may be provided within a range where the driver can see the dashboard.

  The angle adjusting actuator 40b moves the projector 40 so that the projection angle is on the upper side or the lower side according to a signal (detection result) from a rotation angle sensor (not shown) that detects the rotation angle of the steering wheel H. That is, using the position of the steering wheel H when the vehicle is traveling straight as a reference for the rotation angle, the projection angle is adjusted by moving the projector 40 according to how much the steering wheel H has rotated to the right or left from this reference.

In this case, for example, the rotation angle and the drive amount of the projector 40 by the angle adjustment actuator 40b are associated with each other and stored in a memory or the like (rotation angle / drive amount map). The control ECU (not shown) that has acquired the signal (detection result) from the rotation angle sensor outputs a drive signal to the angle adjustment actuator 40b based on the rotation angle / drive amount map. Then, the angle adjustment actuator 40b moves so that the projection angle of the projector 40 is on the upper side or the lower side in accordance with a drive signal from the control ECU. In this way, the projection angle of the projector 40 is adjusted.

  For example, when the steering wheel H is rotated left or right from the position of the steering wheel H when the vehicle is traveling straight, the projector 40 moves downward as the rotation angle of the steering wheel H increases. As the wheel H returns, the projector 40 moves upward. Accordingly, the projector 40 is moved from the position of the steering wheel H when the vehicle is traveling straight so that the projection angle of the projector 40 becomes higher as the rotation angle of the steering wheel H increases, and the projector 40 is moved as the steering wheel H returns. Move so that the projection angle is lower.

  As described above, the display device for a vehicle in the present embodiment is provided with the projector 40 similar to that in the above-described embodiment on the steering wheel H, whereby a plurality of screens 57 in the vehicle interior are interlocked with the rotation of the steering wheel H. An image can be displayed in the region, and any one of the plurality of regions can be displayed at a position corresponding to the rotation angle of the steering wheel H. That is, the display area on the screen 57 in the vehicle interior can be changed in conjunction with the rotation of the steering wheel H.

  Therefore, it is possible to save space by displaying an image on any one of a plurality of areas of the windshield FG using one projector 40. Further, since only one projector 40 is used, wiring can be reduced and power supply noise can be suppressed. Furthermore, since the projector 40 as described above is lighter than a liquid crystal display or the like, an increase in the vehicle weight due to the vehicle display device can also be suppressed.

  When the vehicle is turned left or right, the driver's line-of-sight direction often corresponds to the rotation angle of the steering wheel H. As described above, the vehicle display device according to the present embodiment can display an image at a position corresponding to the rotation angle of the steering wheel H, so that the driver's line-of-sight direction (the driver makes the vehicle turn right or left, etc.) The image can be displayed in the same direction). The image displayed at a position corresponding to the rotation angle of the steering wheel H is necessary for moving the vehicle, for example, an image (information) captured by a camera that monitors the periphery of the vehicle, a vehicle speed, an engine rotation warning, and the like. An image showing various information is, for example.

  Further, as a first modification of the second embodiment, the projector 40 may be provided inside the steering wheel H as shown in FIG. That is, the two-dimensional scanner 10, the angle adjustment actuator (angle adjustment means) 40 b, the semiconductor lasers 21 to 23, and the lens 30 are provided inside the steering wheel H. The lens 30 is a through-hole provided in the steering wheel H, and is provided in the projection window H2 through which light projected from the two-dimensional scanner 10 passes. Further, the projection window H2 (lens 30) is provided at a portion facing the windshield of the steering wheel H.

  Since the steering wheel H is limited in space, other in-vehicle appliances and wiring are often not arranged as compared with the center console and the instrument panel. Therefore, as in the first modification, providing the projector 40 inside the steering wheel H is preferable because it has less influence on other in-vehicle appliances.

  In FIG. 14, the two-dimensional scanner 10, the angle adjusting actuator (angle adjusting means) 40b, the semiconductor lasers 21 to 23, and the lens 30 are separately provided inside the steering wheel H. The present invention is not limited to this. The two-dimensional scanner 10, the angle adjusting actuator (angle adjusting means) 40 b, the semiconductor lasers 21 to 23, and the lens 30 may be provided inside one box, and this box may be provided inside the steering wheel H. The lens 30 adjusts the focus of light from the two-dimensional scanner 10.

  Further, the steering wheel H is rotated by 90 ° or more on both the left and right sides. Therefore, when the steering wheel H is rotated 90 ° or more to the left or right, the projector 40 moving in conjunction with the steering wheel H may not be able to display an image at an appropriate position.

  Therefore, as a second modification of the second embodiment, when the projector 40 is provided inside a single box, the projector 40 does not perform steering until the rotation angle of the steering wheel H reaches 90 ° to the left or right. When rotating with the wheel H and the rotation angle exceeds 90 °, the rotation angle may be fixed at the 90 ° position until the steering wheel returns to the 90 ° position.

  For example, as shown in FIG. 15, the inside of the steering wheel H is made hollow, and the box containing the steering wheel H and the projector 40 is bonded by an electromagnet. Further, a box containing the projector 40 and a non-magnetized balance weight 41 that prevents the box from rotating by 90 ° or more are tied with a string. When the steering wheel H is rotated by 90 ° or more, the electromagnet is turned off so that the movement of the steering wheel H and the box containing the projector 40 are not synchronized.

  By doing in this way, even if it is a case where the steering wheel H rotates 90 degrees or more to the left or the right, since an image can be displayed in the direction which the driver is facing, it is preferred.

  Further, when the steering wheel H rotates 90 ° or more to the left or right, the vehicle is considerably decelerated. Therefore, when the steering wheel H is rotated 90 ° to the left or right, there is no problem in displaying images such as listings around the vehicle, images such as vehicle speed and engine rotation warnings, etc. There are many. Therefore, when the rotation angle of the steering wheel H exceeds 90 °, the display of an image by the projector 40 may be stopped. In this case, the control ECU determines whether or not the rotation angle of the steering wheel H exceeds 90 ° based on the detection result from the rotation angle sensor. And when it determines with the rotation angle of the steering wheel H exceeding 90 degrees, the output of the signal for displaying the image with respect to the projector 40 is stopped.

  Further, when an image is displayed in any one of the plurality of regions of the windshield FG, the projector 40 is provided on the upper portion of the steering shaft housing H1 as in the third modification shown in FIGS. It may be. Thus, by providing the box containing the two-dimensional scanner 10, the semiconductor lasers 21 to 23, and the lens 30 and the angle adjustment actuator (angle adjustment means) 40b on the upper portion of the housing H1 of the steering shaft, the windshield FG An image can be easily displayed at a position corresponding to the rotation angle of the steering wheel H.

  Furthermore, when displaying an image in any of the plurality of regions of the windshield FG, the projector 40 may be provided in the room mirror. As described above, the two-dimensional scanner 10, the semiconductor lasers 21 to 23, the box containing the lens 30 and the angle adjusting actuator (angle adjusting means) 40b are also provided on the rearview mirror. It is possible to easily display an image at a position corresponding to the rotation angle.

  As another embodiment shown in FIG. 18, the transparent EL screen 81 and the small projector 40 as described above are used as the screen (for example, the screens 55 and 56) in the first embodiment described above. You may do it. Here, the projector 40 and the transparent EL screen 81 are disposed so as to face the housing 80.

  The orange color is displayed on the transparent EL screen 81 and a blue picture is displayed on the transparent EL screen 81 from the projector 40. By doing so, the transparent EL screen 81 appears white due to the orange color and the blue color from the projector 40 on the transparent EL screen 81. Further, when a green picture is displayed on the transparent EL screen 81 from the projector 40, the transparent EL screen 81 appears yellow in orange and green on the transparent EL screen 81.

  DESCRIPTION OF SYMBOLS 10 Two-dimensional scanner (scanning part), 11 Support body, 12 Internal movable frame, 13 Mirror part, 14a, 14b 1st torsion bar, 15a, 15b 1st piezoelectric diaphragm, 15ap, 15bp Extraction electrode, 16a, 16b Second torsion bar, 17a, 17b Second piezoelectric diaphragm, 17ap, 17bp Extraction electrode, 21-23 Semiconductor laser (light source), 30 Lens, 31 Lens driving actuator, 40 Projector, 40a Ball, 40a1 Projection window , 41 Balance weight, 40b Angle adjustment actuator (angle adjustment means), 51, 52, 53, 54a, 54b, 55, 56, 57 Screen, 61, 62 Rail, 70 Ceiling, 71 Mounting recess, 80 Housing, 81 Transparent EL screen, S1-S4 seat, Steering wheel, H1 housing, H2 projection window, FG windshield, SG side glass, BG back windscreen, M Miller

Claims (10)

An image is displayed by projecting light provided in a vehicle interior, and includes a scanning unit including a mirror unit formed on a semiconductor substrate and an actuator unit that drives the mirror unit, and the mirror unit. A projector including a light source unit that emits light;
Display driving means for operating the projector so as to display an image by one projector in any one of a plurality of areas in the vehicle interior;
A rotation angle sensor for detecting the rotation angle of the steering wheel,
The display driving unit is configured to operate the projector so as to change a region in which the image is displayed according to a driver's line-of-sight direction, and according to a detection result of the rotation angle sensor as a driver's line-of-sight direction. When the display area of the image is changed, and the rotation angle of the steering wheel exceeds 90 °, the door on the passenger side or the side glass on the passenger side, or the pillar on the rotation direction side of the steering wheel A display device for a vehicle, which displays an image by a projector.   An imaging unit that images a driver's face and a gaze detection device that detects a driver's gaze direction from an image captured by the imaging unit, wherein the display driving unit is detected by the gaze detection device. The vehicle display device according to claim 1, wherein a region in which the image is displayed is changed according to a driver's line-of-sight direction.   The position sensor which detects the position of a shift lever is provided, The said display drive means changes the area | region which displays the said image as a driver | operator's gaze direction according to the detection result of the said position. The vehicle display device described in 1.   An operation means that is operated by an occupant and outputs an instruction signal that instructs an area in which an image is displayed by the projector, and the display driving means has an area for displaying the image in accordance with the instruction signal. The vehicle display device according to claim 1, wherein the projector is operated so as to be changed.   The vehicular display device according to any one of claims 1 to 4, wherein the projector is disposed on a ceiling in the vehicle interior.   The vehicle display device according to claim 5, wherein a rail extending in at least a traveling direction of the vehicle is provided on a ceiling in the vehicle interior, and the projector is arranged to be movable on the rail. .   The vehicle display device according to claim 6, wherein the projector rolls on the rail and is provided in a ball having a projection window through which light projected from the projector passes. A mirror unit formed on a semiconductor substrate and an actuator unit for driving the mirror unit, which is provided on a portion of a steering wheel of a vehicle facing a windshield and displays an image by projecting light A projector including a scanning unit, and a light source unit that emits light to the mirror unit,
A rotation angle sensor for detecting the rotation angle of the steering wheel;
An angle adjusting means for adjusting a projection angle of the projector according to a detection result of the rotation angle sensor.   The projector is installed in the steering wheel, and the steering wheel has a projection window that allows light projected from the projector to pass through a portion facing the windshield. The vehicle display device according to claim 8.   The projector rotates together with the steering wheel until the rotation angle of the steering wheel reaches 90 ° to the left or right, and when the rotation angle exceeds 90 °, the steering wheel is moved to the 90 ° position. The vehicle display device according to claim 9, wherein the rotation angle is fixed at a position of 90 ° until returning.

Images