JP2016020945A - Head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display device that reduces a tremor of a display device due to applied oscillation.SOLUTION: A head-up display device allowing a virtual image of display light emitted by a display unit and rendering a prescribed image to visually recognize the image comprises: an irradiated body 5 that is irradiated with display light; a support body 8 that rotatably supports the irradiated body 5 around a prescribed rotation axial line 5a; and a supported part 52 that is provided in an end part of the irradiated body 5 along the rotation axial line 5a, and is supported by the support body 8. The supported part 52 has a circular arc surface, and the support body 8 comes into point or line contact with the circular arc surface of the supported part 52, and has a reception part that receives oscillation of the supported part 52 accompanied by a rotation of the irradiated body 5. Further, the support body 8 has a pressure part that presses the circular arc surface of the supported part 52 by elastic force in the reception part, which in turn reduces a tremor of a display image due to applied oscillation.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a head-up display device with improved vibration resistance.

It has a display that emits display light representing a predetermined image, and the display light from the display is projected onto the windshield of the vehicle via a reflecting member such as a concave mirror, so that the display image is displayed to the driver. A head-up display (HUD) device that is visually recognized by a virtual image is known.
In addition, in the HUD device, a configuration is known in which a reflecting member such as a concave mirror is rotatable about a predetermined rotation axis in order to match the height of the line of sight when the driver is seated on the seat.

  In Patent Document 1, in a configuration in which a reflecting member such as a concave mirror can be rotated around a predetermined rotation axis, even if vibration is given to the HUD device, it is suppressed from oscillating in a direction of the rotation axis. Thus, there is disclosed a technique for preventing the visible display image from blurring.

JP 2014-85539 A

  However, in the structure of the HUD device according to Patent Document 1, there is room for improvement in vibration resistance in an axial direction other than the rotational axis direction of a reflecting member such as a concave mirror.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head-up display device that can reduce the blurring of a display image due to a given vibration.

The head-up display device according to the present invention includes:
A head-up display device for visually recognizing the image by a virtual image of display light representing a predetermined image emitted from the display device,
An object to be irradiated with the display light;
A support for rotatably supporting the irradiated body around a predetermined rotation axis;
A supported portion provided at an end of the irradiated body along the rotation axis and supported by the supporting body;
The supported portion has an arc surface,
The support portion has a receiving portion that makes point contact or line contact with the arc surface of the supported portion, and that the supported portion slides with the rotation of the irradiated body,
The support portion includes a pressing portion that presses the arc surface of the supported portion against the receiving portion with an elastic force.

The head-up display device according to the present invention is
Furthermore, it is preferable that an elastic body that presses the irradiated body and the support body with an elastic force is attached to the supported section.

Moreover, it is preferable that the said to-be-irradiated body of the head-up display apparatus which concerns on this invention is a reflective mirror which reflects the said display light.

Moreover, it is preferable that the said to-be-irradiated body of the head-up display apparatus which concerns on this invention is a combiner with which the said display light is irradiated.

  According to the present invention, it is possible to reduce the blurring of the display image due to the applied vibration.

1 is a schematic cross-sectional view of a HUD device according to a first embodiment of the present invention. The perspective view in the state where the upper case of the HUD device concerning a first embodiment was removed. The perspective view of the drive unit which rotates the 2nd reflective mirror of the HUD apparatus which concerns on 1st embodiment, and a 2nd reflective mirror. The disassembled perspective view of the drive unit which rotates the 2nd reflective mirror of the HUD apparatus which concerns on 1st embodiment, and a 2nd reflective mirror. The front view which shows the structural example (a) of the support body which supports the 2nd reflective mirror of the HUD apparatus which concerns on 1st embodiment, (b). The schematic sectional drawing of the HUD apparatus which concerns on 2nd embodiment of this invention. The perspective view of the combiner of the HUD apparatus which concerns on 2nd embodiment.

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

(First embodiment)
The HUD device H according to the first embodiment of the present invention includes a display 1, a control board 2 that controls the display 1, a radiator 3 that dissipates heat generated by the display 1, and the display 1 emits. A first reflecting mirror 4 that reflects the display light L, a second reflecting mirror 5 that reflects the display light L reflected by the first reflecting mirror 4, and a drive that rotates the second reflecting mirror 5 about the rotation axis 5a. A unit 6, a lower case 70 made of an impermeable resin, an upper case 71, and a case 7 made of an emission port 72 made of a permeable resin are provided.
The HUD device H reflects the display light L irradiated by the display 1 according to the control of the control board 2 to the first reflecting mirror 4 and the second reflecting mirror 5, and the display light L is emitted from the exit port 72 of the case 7. Project outside the case 7.
This HUD device H is mounted on a vehicle, projects display light L onto a windshield on the driver's seat side of the vehicle, and projects a virtual image in front of the windshield. For example, by projecting an instrument image including the traveling speed of the vehicle, warning information about the vehicle, navigation information, and the like onto the windshield as display light L, the driver can leave the vehicle through the windshield with the line of sight facing forward during driving. Vehicle information can be checked over the landscape.

  The display device 1 includes a backlight substrate 10 and a liquid crystal panel 11.

The backlight substrate 10 includes a circuit substrate on which LEDs (Light Emitting Diodes) and various wirings are mounted and illuminates the liquid crystal panel 11 from the back surface with luminance according to the control of the control substrate 2.
In addition, the backlight substrate 10 has the back surface when the surface on which the LED is mounted as the front surface is in close contact with the radiator 3 made of a metal such as aluminum or copper having high thermal conductivity, and generates heat generated by the LED. Heat is dissipated by the radiator 3.

  The liquid crystal panel 11 is made of, for example, a TFT (Thin Film Transisutor) type liquid crystal panel, and switches each of a plurality of pixels to a transmissive / non-transmissive state under the control of the control substrate 2. That is, the liquid crystal panel 12 emits a predetermined image as the display light L by transmitting light from the backlight substrate 10 with the pixels in the transmissive state.

The control board 2 includes a circuit board on which an interface such as a CPU, a GDC (Graphic Display Controller), a CAN (Controller Area Network), and various wirings are mounted and formed. The vehicle running speed and engine rotation input from the CAN Information on the vehicle such as the number is displayed on the liquid crystal panel 11 as an instrument image, and the illumination brightness of the backlight substrate 10 is controlled.
In addition, a drive circuit for controlling the rotation of the drive unit 6 is mounted on the control board 2, and the drive unit 6 is arranged such that the second reflecting mirror 5 is positioned at an arbitrary angle around the rotation shaft 5 a. To control.

  The first reflecting mirror 4 is a plane mirror and reflects the display light L from the liquid crystal panel 11 to the second reflecting mirror 5.

  The second reflecting mirror 5 receives the display light L from the first reflecting mirror 4 by the reflecting member 50 made of a concave mirror and reflects it toward the exit port 72 of the case 7.

A first supported portion 51 having a gear portion 510 is provided at one end portion of the reflecting member 50, and a cylindrical second supported portion having an arcuate surface 520 is provided at the other end portion.
The first supported portion 51 is supported by the case 7, the second supported portion 52 is supported by a support body 8 which will be described later, and both supported portions 51 and 52 are supported so as to be rotatable about the rotation shaft 5 a. The Thereby, the 2nd reflective mirror 5 is supported so that rotation about the rotating shaft 5a is possible.

The drive unit 6 provided on the first supported portion 51 side of the reflecting member 50 includes a motor 60 that rotates according to control from the control board 2, a worm 61 that rotates on the rotation shaft of the motor 60, A worm wheel 62 that meshes, an output gear 63 that rotates with the worm wheel 62, and a support body 64 that supports the motor 60, the worm 61, the worm wheel 62, and the output gear 63.
The support 64 is supported by the case 7 at a position where the output gear 63 meshes with the gear portion 510 of the first supported portion.
When the motor 60 is rotated by the control board 2, the rotational force generated on the rotation shaft of the motor rotates the output gear 62 via the worm 6 and the worm wheel 62, and engages with the output gear 62. The reflection member 50 rotates around the rotation shaft 5a.

  The support 8 provided on the second supported portion 52 side of the reflection member 50 has an opening 81 formed in a resin base material 80. The opening 81 includes a receiving portion 810 that receives the arc surface 520 of the second supported portion 52, and the second supported portion 52 based on the receiving portion 810 when the second supported portion 52 is inserted through the receiving portion 810. A pressing portion 82 that is pressed by the elastic force of the material 80 is formed.

  The receiving portion 810 has a U-shaped or V-shaped concave shape, abuts the arc surface 520 of the second supported portion 52 in a substantially point contact or line contact state, and can rotate the second supported portion 52. To slide.

  The pressing portion 82 has a V-shaped or Y-shaped lower end when the second supported portion 52 is inserted in a V-shaped (FIG. 5A) or Y-shaped (FIG. 5B) shape. The arc surface 520 of the supported portion 52 is pressed against the receiving portion 810 to come into contact therewith, and the second supported portion 52 is slidably pivoted.

  When the second supported portion 52 of the reflecting member 50 is supported by the support body 8 in this way, the second supported portion 52 has a backlash in the axial direction (FIG. 3: Z direction) orthogonal to the rotational axis 5a. In addition to the reduction, the backlash in the axial direction perpendicular to the rotation axis 5a (FIG. 3: Y direction) is also reduced, and the vibration resistance in the horizontal and vertical directions perpendicular to the rotation axis 5a of the second reflecting mirror 5 is reduced. Rise. Thereby, the HUD device H can reduce the blurring of the display image due to the applied vibration.

Further, the second supported portion 52 is provided with an elastic body 9 made of a coil spring or the like between the reflecting member 20 and the support body 8, and presses the second reflecting mirror 5 and the support body 8 with elastic force. .
The elastic body 9 reduces the backlash of the second reflecting mirror 5 in the direction along the rotation axis 5a (FIG. 3: X direction), and increases the vibration resistance of the second reflecting mirror 5 in the direction of the rotation axis 5a.

  If comprised in this way, the to-be-irradiated body (2nd reflective mirror 5) which can be rotated centering on the rotating shaft 5a of the HUD apparatus H of 1st embodiment will be perpendicular | vertical and a horizontal direction with respect to the rotating shaft 5a by the support body 8. The vibration resistance in two orthogonal axial directions is increased, and the elastic body 9 increases the vibration resistance in the direction along the rotation axis 5a. Thereby, even if vibration is given to HUD device H, it can reduce that a display picture blurs to three axial directions.

  Thus, increasing the vibration resistance in the three-axis directions is suitable when applied to a motorcycle that requires vibration resistance compared to a vehicle.

  The first embodiment in which the irradiated body is a reflecting mirror has been described above. However, the second embodiment may be configured in which the irradiated body is a combiner as described below.

(Second embodiment)
In addition to the configuration of the first embodiment described above, the HUD device H according to the second embodiment of the present invention further includes a combiner C that receives the display light L and displays a virtual image. Similar to the second reflecting mirror 5, the combiner C is configured to be rotatable about the rotation axis Ca by the power of the motor.

The combiner C has a first supported part C0 at one end and a second supported part C1 at the other end, and the first supported part C0 is similar to the first supported part 51 of the second reflecting mirror 5, And if the 2nd supported part C1 is rotatably supported like the 1st supported part 52 of the 2nd reflective mirror 5, the combiner C will be horizontal and perpendicular | vertical with the rotating shaft Ca and the rotating shaft Ca of the combiner C. The vibration resistance in each axis orthogonal to the direction is enhanced.
Thereby, the HUD apparatus H which concerns on 2nd embodiment can reduce that a display image blurs by the given vibration.

  In the above description, in order to facilitate understanding of the present invention, the description of the unimportant known technical matters and the explanation of the technical matters overlapping in the first embodiment and the second embodiment are appropriately omitted.

  The present invention is suitable as a head-up display device to be mounted on a vehicle, a motorcycle, or a mobile body equipped with an agricultural machine or a construction machine.

H: Head-up display device 1: Display device 10: Backlight substrate 11: Liquid crystal panel 2: Control substrate 3: Radiator 4: First reflecting mirror 5: Second reflecting mirror (irradiated body)
5a: Rotating shaft 50: Reflective member 51: First supported portion 510: Gear portion 52: Second supported portion 520: Arc surface 6: Drive unit 60: Motor 61: Worm 62: Worm wheel 63: Output gear 64: Support 7: Case 70: Lower case 71: Upper case 72: Outlet 8: Support 80: Substrate 81: Opening 810: Receiving portion 82: Pressing portion 9: Elastic body C: Combiner (irradiated body)
Ca: rotation axis C0: first supported portion C1: second supported portion L: display light

Claims (4)

A head-up display device for visually recognizing the image by a virtual image of display light representing a predetermined image emitted from the display device,
An object to be irradiated with the display light;
A support for rotatably supporting the irradiated body around a predetermined rotation axis;
A supported portion provided at an end of the irradiated body along the rotation axis and supported by the supporting body;
The supported portion has an arc surface,
The support portion has a receiving portion that makes point contact or line contact with the arc surface of the supported portion, and that the supported portion slides with the rotation of the irradiated body,
The said support part has a pressing part which presses the circular arc surface of the said to-be-supported part to the said receiving part with an elastic force. The head-up display apparatus characterized by the above-mentioned. The head-up display device according to claim 1, wherein an elastic body that presses the irradiated body and the support body with an elastic force is attached to the supported section. The head-up display device according to claim 1, wherein the irradiated object is a reflecting mirror that reflects the display light. The head-up display device according to claim 1, wherein the irradiated object is a combiner irradiated with the display light.

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