CN113330354B - Head-up display device - Google Patents

Head-up display device Download PDF

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Publication number
CN113330354B
CN113330354B CN202080010506.4A CN202080010506A CN113330354B CN 113330354 B CN113330354 B CN 113330354B CN 202080010506 A CN202080010506 A CN 202080010506A CN 113330354 B CN113330354 B CN 113330354B
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CN
China
Prior art keywords
mirror
display
motor
concave mirror
control unit
Prior art date
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Active
Application number
CN202080010506.4A
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Chinese (zh)
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CN113330354A (en
Inventor
野口建
渡边雅博
船见大辉
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Publication of CN113330354A publication Critical patent/CN113330354A/en
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Publication of CN113330354B publication Critical patent/CN113330354B/en
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/80—Arrangements for controlling instruments
    • B60K35/81—Arrangements for controlling instruments for controlling displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/85—Arrangements for transferring vehicle- or driver-related data
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/16—Type of output information
    • B60K2360/167—Vehicle dynamics information
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/23—Optical features of instruments using reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • B60K2360/334—Projection means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • B60K2360/336—Light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/595—Data transfer involving internal databases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/77—Instrument locations other than the dashboard
    • B60K2360/785—Instrument locations other than the dashboard on or in relation to the windshield or windows
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements
    • G02B2027/0159—Head-up displays characterised by mechanical features with movable elements with mechanical means other than scaning means for positioning the whole image
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
    • G02B2027/0198—System for aligning or maintaining alignment of an image in a predetermined direction

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Provided is a head-up display (HUD) device capable of suppressing driving sound of a motor for driving a mirror. The HUD device (10) emits display light (L) reflected by a concave mirror (13) toward a light-transmitting member, and displays an image represented by the display light (L) as a virtual image. The HUD device (10) comprises: a motor for rotationally driving the concave mirror (13); a drive control unit and an origin detection unit which are realized as functions of the control unit (80); a storage unit (81); a mass damper (D). The drive control unit controls the operation of the motor to control the rotation drive of the concave mirror (13). The storage unit (81) stores an initial setting position within the rotation range of the concave mirror (13). An origin detecting unit detects an origin in a rotation range of the concave mirror (13). The mass damper (D) has a mass body (70) and suppresses vibration of the motor.

Description

Head-up display device
Technical Field
The present disclosure relates to a head-up display device.
Background
As a conventional head-up display device, for example, patent document 1 discloses a device that drives a mirror (for example, a concave mirror) that reflects display light representing an image toward a light-transmitting member (for example, a front windshield of a vehicle) by power rotation of a motor.
Prior art literature
Patent literature
Patent document 1: JP-A2010-230157
Disclosure of Invention
Problems to be solved by the invention
In the head-up display device in the past, vibrations generated by a motor for driving the mirror are transmitted to the external case or the like and amplified, and therefore, there is a possibility that the user hears the driving sound of the motor that is harsh.
The present disclosure has been made in view of the above-described circumstances, and an object thereof is to provide a head-up display device capable of suppressing driving noise of a motor for driving a mirror.
Means for solving the problems
In order to achieve the above object, a head-up display device of the present disclosure, which emits display light reflected by a reflecting mirror toward a light-transmitting member to display an image represented by the display light as a virtual image, includes:
a motor for rotationally driving the reflecting mirror;
a drive control unit that controls the operation of the motor to perform rotational drive control of the mirror;
a storage unit that stores an initial setting position within a rotation range of the mirror;
an origin detecting unit that detects an origin in a rotation range of the reflecting mirror;
a mass damper having a mass body for suppressing vibration of the motor,
the drive control unit drives the motor at a 1 st drive frequency after the origin detection unit detects the origin, and moves the mirror to the initial setting position;
the mass of the mass body is determined based on the 1 st drive frequency.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present disclosure, the driving sound of the motor for driving the mirror can be suppressed.
Drawings
Fig. 1 is a diagram of an installation form of a head-up display (HUD) device in a vehicle according to an embodiment of the present disclosure;
fig. 2 is a schematic configuration diagram of the HUD device;
FIG. 3 is a perspective view of a mirror drive;
FIG. 4 is an exploded perspective view of the mirror drive;
fig. 5 is a schematic view for explaining the positional relationship between the concave mirror and the sliding portion;
fig. 6 is a graph showing the effect of reducing the driving sound of the motor.
Detailed Description
1 embodiment of the present disclosure is described with reference to the accompanying drawings.
As shown in fig. 1, a Head-up Display (HUD) device 10 of the present embodiment is disposed, for example, in an instrument panel 2 of a vehicle 1. The HUD device 10 emits display light L toward the front windshield 3. The display light L reflected by the front windshield 3 is directed to the user 4 (mainly the driver of the vehicle 1), and the user 4 recognizes an image represented by the display light L as a virtual image V. The virtual image V is displayed in front of the vehicle 1 via the front windshield 3. Thereby, the user 4 can observe the virtual image V overlapping the front landscape. The virtual image V displays various information (hereinafter, referred to as vehicle information) related to the vehicle 1. Further, the vehicle information includes not only information of the vehicle 1 itself but also external information of the vehicle 1.
As shown in fig. 2, the HUD device 10 includes a display 11, a flat mirror 12, a concave mirror 13, a housing 14, a mirror driving device 20, and an operation unit 90.
The display 11 displays an image, and emits display light L representing the image to the flat mirror 12. The display 11 is configured to include, for example, an LCD (liquid crystal display) and a backlight for illuminating the LCD from behind. The LCD is, for example, a TFT (thin film transistor) type. The backlight is constituted by, for example, an LED (light emitting diode) or a light guide member.
The flat mirror 12 is constituted by, for example, a cold mirror, and is provided so as to be inclined with respect to the optical axis of the display light L emitted from the display 11. The flat mirror 12 reflects the display light L from the display 11 toward the concave mirror 13. The flat mirror 12 is fixed to the housing 14 by a holder not shown.
The concave mirror 13 is formed, for example, by vapor deposition of a reflective layer on a resin substrate made of polycarbonate having a concave surface. The concave mirror 13 amplifies the display light L from the flat mirror 12 and reflects the display light L toward the front windshield 3. Thus, the virtual image V recognized by the user 4 is an enlarged image of the image displayed on the display 11.
The concave mirror 13 is held by a holder 13 a. The holder 13a is made of, for example, a synthetic resin material, and has a shaft portion 13b and a rod portion 13c. The shaft portion 13b has a substantially columnar shape in the height direction in the direction in which the axis AX extends (the direction normal to the paper surface in fig. 2). The shaft portions 13b are provided in a pair on the bracket 13a, but only one shaft portion 13b is shown in fig. 2. The shaft portion 13b is rotatably supported by a bearing portion (not shown) provided in the housing 14. Thus, the concave mirror 13 held by the holder 13a can rotate about the axis AX with respect to the housing 14. The lever portion 13c is formed in a flat plate shape and protrudes toward the mirror driving device 20. The mirror driving device 20 drives the concave mirror 13 held by the holder 13a to rotate about the axis AX by moving the lever portion 13c in parallel in the X-axis direction. As for the mirror driving apparatus 20, details will be described later.
The housing 14 accommodates the display 11, the flat mirror 12, the concave mirror 13, and the mirror driving device 20 in appropriate positions for achieving the above functions. The case 14 is made of synthetic resin or metal, has light-shielding properties, and has a box shape. The housing 14 may be formed by combining a plurality of members. The casing 14 is provided with an emission port 14a that opens toward the front windshield 3. A translucent cover 15 for closing the injection port 14a is attached to the case 14.
The display light L emitted from the display 11 and reflected in the order of the flat mirror 12 and the concave mirror 13 is emitted from the emission port 14a to the outside of the HUD device 10 and directed toward the front windshield 3. The display light L is reflected by the front windshield 3, and a virtual image V is displayed in front of the front windshield 3 when viewed from the user 4 side.
As shown in fig. 3 and 4, the mirror driving device 20 includes a motor 30, a support body 40, a guide shaft G, a sliding portion 50, and a circuit substrate 60. The mirror driving device 20 includes a mass body 70, a control unit 80, and a storage unit 81 schematically shown in fig. 2.
The motor 30 is configured to rotationally drive the concave mirror 13, and is, for example, a PM (permanent magnet) type stepping motor. The motor 30 is driven in a micro-step driving manner by a driving control unit described later. The driven motor 30 rotates a rotation shaft 31 extending along the X-axis shown in fig. 3. A spiral thread groove is formed on the circumferential surface of the rotary shaft 31.
The support body 40 mainly supports the motor 30, and the support body 40 is integrally formed of metal, for example. The support body 40 includes a flat plate portion 40a fixed to the bottom portion 14b (see fig. 2) of the housing 14, and 1 st and 2 nd wall portions 41 and 42 facing each other in the X-axis direction. The support body 40 is fixed to the bottom 14b by a fixing mechanism such as a screw. The support body 40 may be fixed to the bottom 14b via a buffer member, not shown. The 1 st wall 41 stands from one end of the flat plate 40a, and the 2 nd wall 42 stands from the other end of the flat plate 40 a. The motor 30 is mounted on the back surface side of the surface of the 1 st wall 41 facing the 2 nd wall 42. The motor 30 is fixed to the 1 st wall 41 by a fixing mechanism such as a screw. The rotary shaft 31 extending from the motor 30 passes through the insertion hole O1 provided in the 1 st wall portion 41 and is rotatably supported by the bearing hole O2 provided in the 2 nd wall portion 42. In addition, the support body 40 supports the mass body 70.
The guide shaft G is for guiding the movement direction of the slide portion 50, and extends in the X-axis direction as in the rotation shaft 31. One end of the guide shaft G is supported by the 1 st wall 41, and the other end thereof is supported by the 2 nd wall 42.
The slide portion 50 has a base portion 51 and a holding portion 52 holding the rod portion 13c of the concave mirror 13. The sliding portion 50 is integrally formed of a synthetic resin material such as polyacetal.
A guide hole 51a into which the guide shaft G is inserted is formed in the base 51. Further, a nut portion (not shown in the figure) that engages with the screw groove of the rotation shaft 31 is provided in the base portion 51, and moves the sliding portion 50 in the X-axis direction in response to the rotation of the rotation shaft 31. With this structure, the sliding portion 50 can slide along the guide axis G in the X-axis direction according to the rotation of the rotation shaft 31.
The holding portion 52 is provided on the base portion 51, and has a pair of wall portions facing each other, and the lever portion 13c of the concave mirror 13 is sandwiched between the pair of wall portions. As shown in fig. 3, one of the pair of wall portions is formed with a projection 52a projecting toward the other, and the other is provided with a leaf spring 52b. The clamping portion 52 clamps the lever portion 13c in a point contact state by pressing the lever portion 13c against the projection portion 52a by the elastic force of the leaf spring 52b.
The circuit substrate 60 is a printed circuit board on which various circuits are formed, and on which the motor 30, a driving circuit for driving the motor 30, and the switch 61 are mounted. As shown in fig. 3, the circuit substrate 60 is fixed to an upper portion of the 1 st wall portion 41 of the support body 40. The switch 61 is provided at a position facing the slide portion 50 in the X-axis direction, and when the slide portion 50 moves in the left direction in fig. 3, the switch 61 contacts the slide portion 50 and supplies a detection signal indicating the contact to the control portion 80. The control unit 80 performs drive control of the concave mirror 13 with the position of the slide unit 50 at the time of acquiring the detection signal as the origin.
The mass body 70 is a structure functioning as a part of a mass damper D described later, and is provided at any position of the support body 40. The mass body 70 is a counterweight made of a metal material such as brass, for example. The material of the mass body 70 is not limited, but in order to save space and ensure the functions required for the mass damper D, a material having a high specific gravity is preferably selected.
In the mirror driving apparatus 20, the mass body 70 and the support body 40 function as a mass damper D (also referred to as a synchronous mass damper) schematically shown in fig. 2. The mass damper D suppresses resonance phenomenon by adding an auxiliary mass body 70 to the motor 30 to be a vibration absorbing object via the support body 40 functioning as a spring. In this way, the mass damper D suppresses the vibration of the motor 30. As described later, the mass of the mass body 70 is determined based on the driving frequency at which the motor 30 is driven.
The control unit 80 is constituted by a microcomputer having a CPU (central processing unit), a ROM (read only memory), a RAM (random access memory), and the like, and controls the operation of the mirror driving device 20. The storage unit 81 is a nonvolatile memory such as a flash memory, and is controlled by the control unit 80 to store an initial setting position of the concave mirror 13 described later. The initial setting position may be stored in the ROM of the control unit 80. For example, the control section 80 and the storage section 81 are mounted on a printed circuit board (a substrate different from the circuit substrate 60) provided at a predetermined position of the housing 14. In this embodiment, the control unit 80 controls not only the operation of the mirror driving device 20 but also the overall operation of the HUD device 10 and also the display operation of the display 11. For example, the control unit 80 communicates with a system such as an ECU (electronic control unit) that controls each unit of the vehicle 1, and displays an image representing vehicle information on the display 11.
The control unit 80 controls the rotation drive of the concave mirror 13 by driving the motor 30 in a micro-step drive manner via the drive circuit of the circuit substrate 60. That is, the control unit 80 and the drive circuit function as a drive control unit that performs rotational drive control of the concave mirror 13. The drive circuit has a transistor bridge connected to the exciting coil of the motor 30, and is provided so that the direction and magnitude of exciting current flowing into the exciting coil can be adjusted. The drive circuit controls the current flowing through the exciting coil of the motor 30 by the control of the control unit 80. The configuration of the drive control unit is arbitrary, and the drive control unit may be mounted on one substrate, or may be realized by cooperation of the units mounted on a plurality of substrates.
The control unit 80 stores the point where the slide unit 50 contacts the switch 61 in the RAM of the control unit 80 as the origin, and determines where the concave mirror 13 is currently located by counting the number of driving steps of the motor 30 during driving with reference to the origin stored in the RAM.
The control unit 80 controls the rotational position of the concave mirror 13 by driving the motor 30 by the driving circuit to move the slide unit 50 in the X-axis direction within a range between the 1 st wall portion 41 and the 2 nd wall portion 42 of the support body 40. The control unit 80 adjusts the display position in the up-down direction of the virtual image V as viewed from the user 4 by adjusting the position of the concave mirror 13 within a rotation range of the concave mirror 13 in which the virtual image V can be displayed, in accordance with an input operation by the user 4 from the operation unit 90. Then, the control unit 80 uses the position of the concave mirror 13 adjusted by the operation of the user 4 as a new initial setting position, and overwrites (updates) the initial setting position stored in the storage unit 81.
The operation unit 90 receives an input operation by the user 4, is constituted by a known input device such as a button or a touch panel, and supplies a signal indicating the operation content to the control unit 80 in response to the input operation. For example, a steering wheel switch provided in the vehicle 1 may be used as the operation portion 90.
Here, the positional relationship between the concave mirror 13 and the sliding portion 50 will be described with reference to fig. 5. Fig. 5 schematically shows the relationship between the rotational position of the concave mirror 13 and the sliding position of the sliding portion 50, and in reality, the axis AX, which is the rotational center of the concave mirror 13, is not moved in the X-axis direction, of course. The rotation range of the concave mirror 13 in which the display light L reflected by the concave mirror 13 does not reach the front windshield 3 and the virtual image V cannot be displayed is set to the non-display range R1. The rotation range of the concave mirror 13 in which the display light L reflected by the concave mirror 13 reaches the windshield 3 and the virtual image V can be displayed is set as the display range R2. In the non-display range R1, the rotational position of the concave mirror 13 at the position X1 where the sliding portion 50 contacts the switch 61 is set to the 1 st position P1. The initial setting position (position set by adjustment by the user 4) of the concave mirror 13 in the display range R2 is set to the 2 nd position P2. In addition, the position closest to the non-display range R1 within the display range R2, that is, the position of the concave mirror 13 in the case where the virtual image V is switched from the non-display state to the display state is set to the specific position Ps. In this case, the position X1, the position Xs of the sliding portion 50 where the concave mirror 13 is set to the specific position Ps, and the position X2 of the sliding portion 50 where the concave mirror 13 is set to the 2 nd position P2 are set in the order from the near to the far from the switch 61 in the sliding range of the sliding portion 50.
When the ignition device of the vehicle 1 is turned on and the operation power is supplied to the HUD device 10, the control unit 80 drives the motor 30 via the drive circuit to bring the sliding unit 50 into contact with the switch 61, and stores the point of contact as the origin. In this way, the control unit 80 functions as an origin detecting unit that detects the origin. After storing the origin, the control unit 80 rotates the concave mirror 13 from the position P1, which is the origin of the non-display range R1, to the position P2, which is stored as the initial setting position within the display range R2, by moving the slide unit 50 from the position X1 toward the position X2. When the concave mirror 13 is positioned at the position P2, the control unit 80 controls the operation of the display 11 to perform display control of the virtual image V.
In this embodiment, when the concave mirror 13 is rotated from the position P1 (origin) toward the position P2 (initial setting position), the control unit 80 sets the rotation speed of the concave mirror 13 in the non-display range R1 to be faster than the rotation speed of the concave mirror 13 in the display range R2, and shortens the period until the virtual image V starts to be displayed. Specifically, the control unit 80 drives the motor 30 at the 1 st driving frequency when the concave mirror 13 is moved from the position P1 (origin) in the non-display range R1 to the position P2 (initial setting position) in the display range R2. After the concave mirror 13 is moved to the position P2 (initial setting position), the control unit 80 drives the motor 30 at the 2 nd driving frequency lower than the 1 st driving frequency when adjusting the position of the concave mirror 13 within the display range R2 according to the input from the operation unit 90. At this time, the control unit 80 drives the motor 30 at a drive frequency of about 2500pps (pulse per second) (for example, 2496 pps) to achieve the rotation speed of the concave mirror 13 in the non-display range R1, thereby forming the 1 st drive frequency. Accordingly, if no countermeasure is taken, a driving sound in the 2.5kHz band is generated corresponding to the driving frequency, and a user 4 may hear a sound that is so harsh.
Therefore, in the present embodiment, in order to suppress the driving sound generated as described above, the mass of the mass body 70 in the mass damper D is determined according to the driving frequency 2500pps of the motor 30. The mass of the mass body 70 may be obtained theoretically by solving the equation of motion in the linear spring mass system, for example, but is actually obtained by an experiment, a combination of theory and an experiment because there are complex factors such as the configuration of the mirror driving device 20 and the HUD device 10, the mounting mode of the HUD device 10 to the vehicle 1, and the like before the driving sound reaches the ear of the user 4. For the same reason, the placement position of the mass body 70 on the support body 40 for effectively suppressing the driving sound is also preferably obtained by a combination of experiments, theories and experiments.
Fig. 6 shows the effect of the mass damper D on reducing the driving sound of the motor 30. The graph 5 of the solid line shows the measurement result of the driving sound when the mass of the mass body 70 of the mass damper D is determined from the driving frequency of 2496pps in the mirror driving device 20 described above. On the other hand, a curve 6 of the broken line is a measurement result of the driving sound of the mirror driving device in which the mass damper D is not provided. Referring to fig. 6, it is apparent that when the mass damper D is provided, the driving sound in the 2.5kHz band is significantly reduced as compared with when the mass damper D is not provided.
(1) The HUD device 10 described above emits the display light L reflected by the concave mirror 13 (an example of a reflecting mirror) toward the front windshield 3 (an example of a light-transmitting member), and displays an image represented by the display light L as a virtual image V. The HUD device 10 includes a motor 30 for rotationally driving the concave mirror 13, a drive control unit and an origin detection unit, which are realized as functions of the control unit 80, a storage unit 81, and a mass damper D. The drive control unit controls the operation of the motor 30 to perform rotational drive control of the concave mirror 13. The storage unit 81 stores an initial setting position (position P2) within the rotation range of the concave mirror 13. The origin detecting unit detects an origin (position P1) within a rotation range of the concave mirror 13. The mass damper D has a mass body 70 and suppresses vibration of the motor 30.
According to this structure, as described above, the driving sound of the motor 30 for driving the mirror can be suppressed.
(2) Specifically, the origin (position P1) is located in a rotation range (non-display range R1) of the concave mirror 13 in which display of the virtual image V is not possible. The initial setting position (position P2) is located within a rotation range (display range R2) of the concave mirror 13 in which the virtual image V can be displayed.
According to this configuration, the driving sound of the motor 30 when the mirror is rotated from the origin located in the non-display range R1 to the initial setting position located in the display range R2 can be suppressed.
(3) The HUD device 10 further includes an operation unit 90. Then, the drive control unit moves the concave mirror 13 to the initial setting position, and then drives the motor 30 at the 2 nd drive frequency lower than the 1 st drive frequency in accordance with the input from the operation unit 90, thereby moving the position of the mirror within the rotation range (display range R2) of the concave mirror 13 in which the virtual image V can be displayed. According to this structure, the driving sound at the 1 st driving frequency which is remarkably generated can be effectively reduced as compared with the driving sound at the 2 nd driving frequency corresponding to the adjustment operation of the user 4. Thus, for example, the driving sound during which the HUD device 10 is activated and the concave mirror 13 is moved to the initial setting position (that is, during which the vehicle 1 has not yet started traveling, no road noise, and the driving sound is supposed to be noticed) can be effectively reduced.
In addition, the present disclosure is not limited by the above embodiments and drawings. Changes (including deletion of constituent elements) can be appropriately applied within a range that does not change the gist of the present disclosure.
In the optical path of the display light L connecting the flat mirror 12 and the concave mirror 13, a flat mirror other than the flat mirror 12 may be provided. Alternatively, a free-form mirror may be provided instead of the flat mirror 12. In the HUD device 10, several mirrors are used, and how the optical path of the display light L is folded back can be changed as appropriate according to the design.
While the example in which the concave mirror 13 is rotationally moved by the mirror driving device 20 has been described above, the mirror driving device 20 may be a device that rotationally moves a flat mirror or a free-form mirror (other examples of mirrors). The mirror driving device 20 is arbitrary in configuration as long as it is a device that rotationally drives the mirror by the power of the motor 30.
While the example in which the mass body 70 is provided on the support body 40 has been described above, the mass body may be attached to the motor 30 and the support body 40 via an elastic member.
While the mass of the mass body 70 is determined based on the driving frequency of the motor 30 when the concave mirror 13 is rotationally driven in the non-display range R1 as described above, the mass of the mass body 70 may be determined based on the driving frequency of the motor 30 when the concave mirror 13 is rotationally driven in the display range R2. The frequency band to be suppressed in the driving sound is also arbitrary, and may be higher or lower than the 2.5kHz frequency band. For example, the user 4 may feel a pleasant frequency band, and any frequency band in the range of 1kHz to 5kHz may be used. If the mass body is made lighter than the mass body 70 of the mass damper D that suppresses the 2.5kHz band of the driving sound, an arbitrary band higher than the 2.5kHz band can be reduced, and if the mass body is made heavier, an arbitrary band lower than the 2.5kHz band can be reduced.
In the above, the example in which the support body 40 is fixed to the bottom 14b of the housing 14 is shown, but not limited thereto. As long as the mirror can be rotationally moved, how the support body 40 of the mirror driving device 20 is fixed with respect to the housing 14 is arbitrary.
The display 11 is not limited to a display using an LCD, and a display using an OLED (organic light emitting diode) may be used. The display 11 may be a reflective display device such as a DMD (digital micromirror device) or an LCOS (liquid crystal silicon) device.
The light-transmitting member to be projected with the display light L is not limited to the front windshield 3 of the vehicle 1, and may be a combiner composed of a plate-like half mirror, a hologram element, or the like.
The type of the vehicle 1 on which the HUD device 10 is mounted is not limited, and the HUD device can be applied to various vehicles such as a four-wheeled motor vehicle and a two-wheeled motor vehicle. The HUD device 10 may be mounted on a vehicle other than the vehicle 1, such as an airplane, a ship, or a snowmobile.
In the above description, descriptions of well-known technical matters are omitted as appropriate for easy understanding of the present disclosure.
Description of the reference numerals:
reference numeral 1 denotes a vehicle;
reference numeral 2 denotes an instrument panel;
reference numeral 3 denotes a front windshield;
reference numeral 4 denotes a user;
symbol L represents display light;
symbol V represents a virtual image;
reference numeral 10 denotes a head-up display (HUD) device;
reference numeral 11 denotes a display;
reference numeral 12 denotes a plane mirror;
reference numeral 13 denotes a concave mirror (an example of a reflecting mirror);
the symbol R1 represents a non-display range;
the symbol R2 represents a display range;
symbol P1 represents position 1;
symbol P2 represents position 2;
the symbol Ps represents a specific position;
reference numeral 13a denotes a holder;
reference numeral 13b denotes a shaft portion;
reference numeral 13c denotes a lever portion;
symbol AX denotes an axis;
reference numeral 14 denotes a housing;
reference numeral 14a denotes an ejection port;
reference numeral 14b denotes a bottom;
reference numeral 20 denotes a mirror driving device;
reference numeral 30 denotes a motor;
reference numeral 31 denotes a rotation shaft;
reference numeral 40 denotes a support body;
reference numeral 40a denotes a flat plate portion;
reference numeral 41 denotes a 1 st wall portion;
reference numeral 42 denotes a 2 nd wall portion;
symbol G represents a guide shaft;
reference numeral 50 denotes a sliding portion;
reference numeral 51 denotes a base;
reference numeral 52 denotes a clamping portion;
reference numeral 60 denotes a circuit substrate;
reference numeral 61 denotes a switch;
reference numeral 70 denotes a mass body;
symbol D denotes a mass damper;
reference numeral 80 denotes a control section;
reference numeral 81 denotes a storage section;
reference numeral 90 denotes an operation section.

Claims (3)

1. A head-up display device that emits display light reflected by a reflecting mirror toward a light-transmitting member to display an image represented by the display light as a virtual image, the head-up display device comprising:
a motor for rotationally driving the reflecting mirror;
a drive control unit that controls the operation of the motor to perform rotational drive control of the mirror;
a storage unit that stores an initial setting position within a rotation range of the mirror;
an origin detecting unit that detects an origin in a rotation range of the reflecting mirror;
a mass damper having a mass body for suppressing vibration of the motor,
the drive control unit drives the motor at a 1 st drive frequency after the origin detection unit detects the origin, and moves the mirror to the initial setting position;
the mass of the mass body is determined based on the 1 st drive frequency.
2. The head-up display device according to claim 1, wherein the origin is located in a non-display range within a rotation range of the mirror in which the virtual image cannot be displayed, and the initial setting position is located in a display range within a rotation range of the mirror in which the virtual image can be displayed.
3. The head-up display device according to claim 2, wherein the head-up display device includes an operation section;
the drive control unit drives the motor at a 2 nd drive frequency lower than the 1 st drive frequency in response to an input from the operation unit after the mirror is moved to the initial setting position, and moves the position of the mirror within a rotation range of the mirror that allows display of the virtual image.
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022071374A1 (en) * 2020-10-02 2022-04-07 日本精機株式会社 Mirror and head-up display device
CN116560038B (en) * 2023-05-22 2024-01-09 江苏泽景汽车电子股份有限公司 Mirror mounting structure and head-up display

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009073461A (en) * 2007-08-29 2009-04-09 Nippon Seiki Co Ltd Head-up display device
JP2010208565A (en) * 2009-03-12 2010-09-24 Nippon Seiki Co Ltd Headup display device
CN102047006A (en) * 2008-05-26 2011-05-04 日本精机株式会社 Power transmission device
JP2014010347A (en) * 2012-06-29 2014-01-20 Jvc Kenwood Corp Image display device, and image display method
CN104169778A (en) * 2012-03-15 2014-11-26 松下电器产业株式会社 Optical reflecting element and actuator
CN104204900A (en) * 2012-03-23 2014-12-10 松下电器产业株式会社 Scanning mirror and scanning image display device
CN104884993A (en) * 2012-12-21 2015-09-02 三菱电机株式会社 Optical scanning apparatus and projector
JP2016008674A (en) * 2014-06-25 2016-01-18 日本精機株式会社 Drive unit
CN105659145A (en) * 2013-10-24 2016-06-08 日本精机株式会社 Display apparatus
JP2016224258A (en) * 2015-05-29 2016-12-28 キヤノン株式会社 Optical scanner and image forming apparatus
JP2017009855A (en) * 2015-06-24 2017-01-12 デクセリアルズ株式会社 Head-up display device
CN107003524A (en) * 2014-12-09 2017-08-01 日本精机株式会社 Head-up display
CN107894660A (en) * 2016-10-04 2018-04-10 矢崎总业株式会社 Display apparatus
CN108292045A (en) * 2016-02-12 2018-07-17 麦克赛尔株式会社 Vehicle image display
CN108473055A (en) * 2016-02-05 2018-08-31 麦克赛尔株式会社 head-up display device
CN108688556A (en) * 2017-04-12 2018-10-23 Lg电子株式会社 Motor-vehicle bulb
JP2018193060A (en) * 2018-07-27 2018-12-06 日本精機株式会社 Head-up display device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4973961B2 (en) 2009-02-18 2012-07-11 日本精機株式会社 Power transmission device used for vehicle head-up display device
JP6384272B2 (en) * 2014-10-30 2018-09-05 日本精機株式会社 Head-up display device
KR101702888B1 (en) * 2015-10-12 2017-02-06 현대자동차주식회사 Vehicle view angle controlling apparatus, vehicle having the same and vehicle view angle controlling method

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009073461A (en) * 2007-08-29 2009-04-09 Nippon Seiki Co Ltd Head-up display device
CN102047006A (en) * 2008-05-26 2011-05-04 日本精机株式会社 Power transmission device
JP2010208565A (en) * 2009-03-12 2010-09-24 Nippon Seiki Co Ltd Headup display device
CN104169778A (en) * 2012-03-15 2014-11-26 松下电器产业株式会社 Optical reflecting element and actuator
CN104204900A (en) * 2012-03-23 2014-12-10 松下电器产业株式会社 Scanning mirror and scanning image display device
JP2014010347A (en) * 2012-06-29 2014-01-20 Jvc Kenwood Corp Image display device, and image display method
CN104884993A (en) * 2012-12-21 2015-09-02 三菱电机株式会社 Optical scanning apparatus and projector
CN105659145A (en) * 2013-10-24 2016-06-08 日本精机株式会社 Display apparatus
JP2016008674A (en) * 2014-06-25 2016-01-18 日本精機株式会社 Drive unit
CN107003524A (en) * 2014-12-09 2017-08-01 日本精机株式会社 Head-up display
JP2016224258A (en) * 2015-05-29 2016-12-28 キヤノン株式会社 Optical scanner and image forming apparatus
JP2017009855A (en) * 2015-06-24 2017-01-12 デクセリアルズ株式会社 Head-up display device
CN108473055A (en) * 2016-02-05 2018-08-31 麦克赛尔株式会社 head-up display device
CN108292045A (en) * 2016-02-12 2018-07-17 麦克赛尔株式会社 Vehicle image display
CN107894660A (en) * 2016-10-04 2018-04-10 矢崎总业株式会社 Display apparatus
CN108688556A (en) * 2017-04-12 2018-10-23 Lg电子株式会社 Motor-vehicle bulb
JP2018193060A (en) * 2018-07-27 2018-12-06 日本精機株式会社 Head-up display device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Milanovic, Veljko等.High Brightness MEMS Mirror Based Head-Up Display (HUD) Modules with Wireless Data Streaming Capability.Proceedings of SPIE.2015,第9375卷1-8. *
陈曙光等.前风挡集成式抬头显示集成方案.汽车零部件.2018,第118卷(第4期),1674-1986. *

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