JP2018047811A - Vehicular head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular head-up display device in which appearance of a virtual image has less discomfort even when a vehicle turns.SOLUTION: A display tool 11 emits a display light L. Control means 200 displays a first image G1 and a second image G2 on the display tool 11. A vehicular head-up display device displays a first virtual image V1 with the first image G1 and displays a second virtual image V2 with the second image G2 on a distant place from the first virtual image V1. The control means 200 moves the first image G1 and the second image G2 according to turning of the vehicle.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicle head-up display device that displays a virtual image.

  Conventionally, various vehicle head-up display devices for displaying a virtual image by projecting display light onto a windshield of a vehicle have been proposed. Such a head-up display device for a vehicle projects display light emitted from a display device onto a windshield via a reflecting mirror such as a concave mirror and displays navigation information as a virtual image. The vehicle driver can visually recognize the virtual image superimposed on the scenery in front of the vehicle.

Japanese Patent Laying-Open No. 2015-161632

However, when the vehicle turns right or left, the landscape in front of the vehicle appears to move greatly as the vehicle turns, and if the position of the virtual image remains constant, there will be a large difference from the movement of the landscape, which makes it uncomfortable. Had.
The present invention has been made in view of this problem, and provides a head-up display device for a vehicle with less discomfort in the appearance of a virtual image even when the vehicle is turning.

  The present invention includes a display that emits display light, and a control unit that displays a first image and a second image on the display, and displays a first virtual image on the first image. , A vehicle head-up display device that displays a second virtual image farther than the first virtual image in the second image, wherein the control means is configured to change the first virtual image in response to turning of the vehicle. The image and the second image are moved.

  Further, the present invention is characterized in that the movement amount of the second image is larger than the movement amount of the first image.

  Further, the present invention is characterized in that the control means does not display the second image on the display when the turning becomes larger than a predetermined value.

  Since the first virtual image and the second virtual image move according to the turning of the vehicle, there is little discomfort.

Sectional drawing which shows embodiment of this invention. The general-view figure which shows embodiment same as the above. The block diagram which shows embodiment same as the above. Image explanatory drawing which shows embodiment same as the above. Virtual image explanatory drawing which shows embodiment same as the above. Virtual image explanatory drawing which shows embodiment same as the above. Virtual image explanatory drawing which shows embodiment same as the above.

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

  The vehicle head-up display device 10 is disposed on the dashboard 1 of the vehicle, and projects display light L onto the windshield 2 to display virtual images V1, V2, and V3. The vehicle head-up display device 10 includes a liquid crystal display 11, a reflection mirror 12, and a housing 13. The liquid crystal display 11 and the reflection mirror 12 are accommodated in a housing 13.

  The liquid crystal display 11 includes a liquid crystal display panel 11a, a lens member 11b, a light emitting element 11c, a hard wiring board 11d, a case body 11e, and a heat sink 11f. The liquid crystal display panel 11a is obtained by attaching polarizing members to both front and rear surfaces of a TFT (Thin Film Transistor) type liquid crystal cell. The lens member 11b is made of a translucent resin such as polycarbonate and has a plurality of convex lens portions. The lens member 11b is disposed between the liquid crystal display panel 11a and the light emitting diode 11c. The plurality of light emitting elements 11 c are arranged close to each other and are mounted on the hard wiring board 19. Each convex lens portion of the lens member 11b is provided at a location corresponding to the light emitting element 11c, and condenses light emitted from the light emitting element 11c.

  The case body 11e is made of a white resin and has a substantially rectangular tube shape. The liquid crystal display panel 11a is provided at the opening end of the case body 11e, and is transmitted and illuminated by illumination light emitted from the light emitting element 11c and condensed by the lens member 11b. The heat sink 11f is made of a metal (for example, aluminum) having good thermal conductivity, and has a plurality of heat radiation fins 11g. The heat sink 11f is disposed on the rear surface of the hard wiring board 11d, and dissipates heat generated by the light emitting element 11c to the outside of the housing 13.

  The reflection mirror 12 is a concave mirror in which aluminum (Al) is deposited on a resin such as polycarbonate (PC) to form a reflection film. The housing 13 includes an upper case 13a and a lower case 13b. The upper case 13a is provided with a window portion 13c from which the display light L is emitted. This window part 13c consists of translucent resin (for example, acrylic), and has a curved shape. The upper case 13a of the housing 13 is provided with a light shielding wall 13d to prevent a phenomenon (washout) in which external light such as sunlight is incident on the liquid crystal display panel 11a and the virtual images V1, V2, and V3 become difficult to see. Yes. The light shielding wall 13d has a flat plate shape and is formed so as to hang obliquely from the upper part of the upper case 13a.

  FIG. 3 is a block diagram showing an electrical configuration of the present embodiment. The control unit 200 includes a control unit 210, an information image generation unit 220, and an image memory 230. The control means 200 drives the liquid crystal display panel 11a to display an image on the liquid crystal display panel 11a, and drives the light emitting element 11c to light the light emitting element 11c. The control means 200 is connected to an in-vehicle communication bus 300 such as a CAN (Controller Area Network). A vehicle ECU 340, a front recognition unit 350, a vehicle exterior communication unit 360, and a navigation system 370 are connected to the in-vehicle communication bus 300.

  FIG. 4 shows an example of an image displayed on the liquid crystal display panel 11 a by the control means 200. On the liquid crystal display panel 11a, a short-distance image (first image) G1, a medium-distance image (second image) G2, and a long-distance image G3 are displayed. The short-distance image G1, the medium-distance image G2, and the long-distance image G3 displayed on the liquid crystal display panel 11a are projected onto the windshield 2 through the reflecting mirror 12, and are virtual images (first virtual images) V1 and virtual images (second images). Virtual image) V2 and virtual image V3 are displayed. The short-range image G1 is an image imitating a plurality of lanes. The medium distance image G2 is an arrow image indicating that the vehicle turns left at the next intersection. The long-distance image G3 is an image imitating a traffic light.

  The control means 200 moves the short-distance image G1, the medium-distance image G2, and the long-distance image G3 according to the turning of the vehicle. When the turning of the vehicle becomes larger than a predetermined value, the long distance image G3, the medium distance image G2, and the short distance image G1 are sequentially erased. The turning of the vehicle is calculated based on the steering angle data and the vehicle speed data input from the vehicle ECU 340. For example, the vehicle may be calculated based on the acceleration detected by the acceleration sensor, or may be calculated using the imaging camera. You may calculate based on the image data obtained.

  5 to 7 show display examples when the vehicle turns left. The virtual images V1, V2, and V3 continuously move according to the turning of the vehicle. However, in order to help understanding, the virtual images at each stage of (1) to (6) based on FIGS. The display positions of V1, V2, and V3 will be described. The movement of the virtual images V1, V2, and V3 is equivalent to the movement of the short-distance image G1, the medium-distance image G2, and the long-distance image G3 displayed on the liquid crystal display panel 11a.

(1)
The virtual image V2 is displayed farther than the virtual image V1. Furthermore, the virtual image V3 is displayed farther than the virtual image V2.
(2)
As the vehicle turns, the display position of the virtual image V3 moves to the right. The moving amount of the virtual image V3 is “d1”. The virtual image V3 is displayed slightly thinner. The display positions of the virtual images V1, V2 are not changed.

(3)
The display position of the virtual image V3 further moves to the right. The movement amount of the virtual image V3 is “d1 + d3”. The virtual image V3 is displayed thinner. The display position of the virtual image V2 moves to the right. The moving amount of the virtual image V2 is “d2”. The virtual image V2 is displayed slightly thinner. The display position of the virtual image V1 does not change.
(4)
The display position of the virtual image V3 further moves to the right. The movement amount of the virtual image V3 is “d1 + d3 + d6”. The virtual image V3 is displayed thinner. The display position of the virtual image V2 further moves to the right. The moving amount of the virtual image V2 is “d2 + d5”. The virtual image V2 is displayed thinner. The virtual image V1 moves to the right. The moving amount of the virtual image V1 is “d4”. The virtual image V1 is displayed slightly thinner.

(5)
The virtual image V3 is not displayed. The display position of the virtual image V2 further moves to the right. The movement amount of the virtual image V2 is “d2 + d5 + d8”. The virtual image V2 is displayed thinner. The display position of the virtual image V1 further moves to the right. The moving amount of the virtual image V1 is “d4 + d7”. The virtual image V1 is displayed thinner.
(6)
The virtual images V2 and V3 are not displayed. The moving amount of the virtual image V1 is “d4 + d7 + d9”. The virtual image V1 is displayed thinner.

  As described above, the virtual images V1, V2, and V3 are displayed while being moved horizontally in the direction opposite to the turning of the vehicle, so that the movement of the virtual images V1, V2, and V3 with reference to the scenery in front of the vehicle is achieved. Since it becomes smaller, the feeling of strangeness is reduced. Further, by fading out the virtual images V1, V2, and V3, it is possible to prevent the virtual images V1, V2, and V3 from being displayed suddenly, and to further reduce the sense of discomfort.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible. For example, in the present embodiment, the short-distance image G1, the medium-distance image G2, and the long-distance image G3 are displayed on the liquid crystal display panel 11a, but the medium-distance image (first image) G2 and the long-distance image are displayed. (Second image) Only G3 may be displayed.

11 Liquid crystal display (display)
200 Control means L Display light V1 Virtual image (first virtual image)
V2 virtual image (second virtual image)
V3 virtual image G1 image (first image)
G2 image (second image)
G3 image

Claims (3)

A display that emits display light; and a control unit that causes the display to display a first image and a second image. The first image is displayed on the first image, and the second image is displayed. A vehicle head-up display device that displays a second virtual image farther than the first virtual image in the image of
The vehicle head-up display device, wherein the control means moves the first image and the second image according to turning of the vehicle.   The vehicle head-up display device according to claim 1, wherein the movement amount of the second image is larger than the movement amount of the first image.   3. The vehicle head-up display device according to claim 1, wherein the control unit does not display the second image on the display when the turn is greater than a predetermined value. 4. .

Images