JP2011203643A - Head-up display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display device for vehicle, which is configured to easily compares a distance relationship between a head-up display image and a road in front of a vehicle, and easily grasps a distance up to each of various caution points in a short time.SOLUTION: A storage means 35 is configured to store road shape data. An own vehicle position detecting means 34 is configured to detect an own vehicle position. A control means 20 is configured to control a display means 40 to display a first display image 44f showing a shape of the road in front of the own vehicle in a predetermined display area D based on the position data from the own vehicle position detecting means 34 and the road shape data. The control means 20 is configured to arrange, in a three-dimensional space displayed by the display means 40, the first display image 44f and a second display image 44g corresponding to the display area D in positions obtained from the optical arrangement based on the position data and the road shape data.

Description

  The present invention relates to a vehicle head-up display device that stereoscopically displays a road shape ahead of a host vehicle.

  Conventionally, various navigation devices for guiding a route to a destination by image display have been proposed, and for example, disclosed in Patent Document 1. Such a navigation device inputs a destination before departure and searches for a route to the destination. On the display screen of the navigation device, route guidance information to the destination is displayed superimposed on the front road scenery from the viewpoint of the driver.

JP 2007-155747 A

However, because there is a difference in scale between the route guidance information display and the front landscape, and because the three-dimensional front road landscape is two-dimensionally displayed, the road display alone is a right / left turn intersection or road that accompanies the route guidance. There was a problem that it was difficult to grasp the distance to the above various points of interest.
The present invention provides a head-up display device for a vehicle that makes it easy to compare the distance relationship between a head-up display image and a road ahead and can easily grasp the distance to various points of interest in a short time.

  In order to solve the above problems, the present invention provides a display means 40, a storage means 35 for storing road shape data, a vehicle position detection means 34 for detecting the vehicle position, and a vehicle position detection means 34. Control means 20 for displaying a first display image 44f representing a road shape ahead of the host vehicle on the display means 40 on a predetermined display area D based on the position data and the road shape data, and the road shape The control unit 20 corresponds to the first display image 44f and the display area D in the three-dimensional space displayed by the display unit 40. The second display image 44g is arranged at a position obtained from the optical arrangement of the position data and the road shape data.

  Further, according to the present invention, the control means 20 includes the ratio of the viewing angle of the second display image 44g to the viewing angle of the first display image 44f from the driver viewpoint, and the road ahead of the vehicle from the driver viewpoint. Display data in which the ratio of the display angle of view 44d of the display area D to the width viewing angle 44e is substantially matched is generated.

  By displaying the first display image representing the road shape ahead of the host vehicle and the image shape of the displayed head-up display so that the relationship between the position and size is the same, it is easy and quick. It is possible to grasp the distance to various caution points.

1 is an overview diagram showing an embodiment of the present invention. The principal part enlarged view which shows embodiment same as the above. The principal part enlarged view which shows embodiment same as the above. The block diagram which shows embodiment same as the above. Explanatory drawing of the virtual three-dimensional space which shows embodiment same as the above. Explanatory drawing of the display angle of view which shows embodiment same as the above.

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

  Reference numeral 1 denotes illuminating means, and the illuminating means 1 includes a left-eye light emitting element 2L, a right-eye light emitting element 2R, and a condenser lens 3 (see FIG. 2). The left-eye light-emitting element 2L and the right-eye light-emitting element 2R are composed of light-emitting diodes, and light emitted from the left-eye light-emitting element 2L and the right-eye light-emitting element 2R is collimated by the condenser lens 3. Reference numeral 4 denotes an optical axis control means. The optical axis control means 4 has a mask 5 and an actuator 6. Openings 5a and 5b are formed in the mask 5, and light emitted from the left-eye light-emitting element 2L and the right-eye light-emitting element 2R is allowed to pass therethrough. The actuator 6 is driven by an actuator control unit, which will be described later, and moves the mask 5 left and right. Reference numeral 7 denotes a convex lens. The convex lens 7 condenses the illumination light emitted from the illumination unit 1 and passed through the openings 5a and 5b of the mask 5.

  Reference numeral 10 denotes a liquid crystal display panel. The liquid crystal display panel 10 alternately displays a left-eye image and a right-eye image in terms of time. The liquid crystal display panel 10 is composed of an OCB mode liquid crystal display element. Reference numeral 11 denotes a cold mirror. The cold mirror 11 reflects display light emitted from the liquid crystal display panel 10 and transmits infrared light emitted from a light emitting element described later. A concave mirror 12 projects the display light onto the windshield 13. Reference numeral 15 denotes an imaging camera, and the imaging camera 15 images the driver 16 via the cold mirror 11, the concave mirror 12 and the windshield 13. A light emitting element 17 emits infrared light and illuminates the driver 16 through the cold mirror 11, the concave mirror 12 and the windshield 13. The imaging camera 15 and the light emitting element 17 are disposed on the rear side of the cold mirror 11.

  Illumination light emitted from the left-eye light-emitting element 2L and the right-eye light-emitting element 2R is converted into parallel light by the condenser lens 3 and enters the mask 5, and part of the illumination light passes through the openings 5a and 5b of the mask 5. Illumination light emitted from the openings 5 a and 5 b of the mask 5 is refracted by the convex lens 7, passes through the liquid crystal display panel 10, is reflected by the cold mirror 11, is enlarged by the concave mirror 12, and is projected onto the windshield 13. The Of the display light reflected by the concave mirror 12, the display light further reflected by the windshield 13 reaches the left eye 16L and the right eye 16R of the driver 16.

  The left-eye light-emitting element 2L and the right-eye light-emitting element 2R are alternately lit. When the left-eye light-emitting element 2L is lit, a left-eye image is displayed on the liquid crystal display panel 10, and the right-eye light-emitting element 2R is lit. When the image is being displayed, the right-eye image is displayed on the liquid crystal display panel 10. By controlling the liquid crystal display panel 10 and the left-eye light-emitting element 2L and the right-eye light-emitting element 2R in synchronization, the left eye 16L and the right eye 16R are irradiated with light capable of projecting different left-eye images and right-eye images, respectively. The stereoscopic image can be perceived by the driver 16.

  FIG. 4 is a block diagram showing an electrical configuration of the vehicle head-up display device. The control means 20 includes a viewpoint detection processing unit 21, a display control unit 22, a time division control unit 23, and an actuator control unit 24. The viewpoint detection processing unit 21 detects the viewpoint position of the driver 16 from the imaging data obtained by the imaging camera 15 and outputs the viewpoint position data to the display control unit 22 and the actuator control unit 24. The actuator control unit 24 translates the mask 5 in the horizontal direction by the actuator 6 based on the viewpoint position data. For example, when the viewpoint of the driver 16 is shifted to the left, the mask 5 is moved to the right (see FIG. 3).

  The display control unit 22 generates images from the viewpoints of the left eye 16L and the right eye 16R based on the viewpoint position data obtained by the viewpoint detection processing unit 21, and further corrects distortion during projection based on the curved shape of the windshield 13. Processing is performed to display the left and right images on the liquid crystal display element 10 in a time-sharing manner. Further, the display control unit 22 converts the viewpoint position of the image displayed on the liquid crystal display panel 10 based on the viewpoint position data. The driver 16 can see the enlarged left-eye virtual image VL and right-eye virtual image VR, and can perceive the HUD display image 44b having a sense of depth. Note that the cycle of switching between the left-eye image and the right-eye image displayed on the liquid crystal display panel 10 is desirably 60 Hz or more on each of the left and right sides, and eye strain can be prevented.

  Reference numeral 31 denotes a speed sensor, which detects the traveling speed of the host vehicle and outputs speed data to the control means 20. Reference numeral 34 denotes a vehicle position detection unit. The vehicle position detection unit 34 includes a GPS receiver 32 and a gyro sensor 33. The GPS receiver 32 receives radio waves from GPS satellites and outputs GPS data to the control means 20. The gyro sensor 33 calculates the direction in which the vehicle is facing and outputs the direction data to the control means 20. Reference numeral 35 denotes a storage unit (storage means) such as a hard disk or a flash memory. The storage unit 35 stores map data and road shape data. Reference numeral 36 denotes a calculation unit. The calculation unit 36 calculates the current position of the host vehicle based on GPS data input from the GPS receiving unit 32 via the control means 20.

  Reference numeral 37 denotes a drive circuit, and the liquid crystal display panel 10 is driven through the drive circuit 37. The display (display means) 40 includes the liquid crystal display panel 10, the drive circuit 37, the left-eye light-emitting element 2L, the right-eye light-emitting element 2R, and the like. The display control unit 22 calls the road shape data ahead of the host vehicle from the storage unit 35 based on the signal values from the speed sensor 31, the GPS receiving unit 32, and the gyro sensor 33, and shows the road shape seen from the driver's viewpoint. A three-dimensional road shape image is generated and displayed on the display 40.

  FIG. 5 is a side view of the virtual three-dimensional space S generated by the display control unit 22. The display control unit 22 arranges the road shape display 44f in the virtual three-dimensional space S based on the vehicle position data and the road shape data. Further, the display control unit 22 sets a viewpoint position 43a at a position above the own vehicle position by the viewpoint height 43e, and a depression angle 43d and a display distance obtained from the viewpoint position 43a from the optical configuration of the vehicle head-up display device. An HUD image shape display (second display image) 44g is arranged at a position consisting of 43b.

  The display control unit 22 adjusts the viewpoint and the viewing angle, and generates a display image for display on the liquid crystal display panel 10. Further, the display control unit 22 generates left-eye and right-eye images by shifting the viewpoint position 43a in the left-right direction in order to display a stereoscopic image by binocular parallax. The HUD image shape display 44g includes a frame in which key-shaped displays are arranged at four corners of a rectangle (see FIG. 6B).

  Next, the adjustment of the angle of view will be described based on FIG. FIG. 6A shows the relationship among the front road 44a, the HUD display image 44b, and the vehicle body 44c. The HUD display image 44b is displayed in the display area D over the windshield of the vehicle. The horizontal angle of view of the HUD display image 44b viewed from the driver 16 is defined as an HUD angle of view 44d, and the horizontal viewing angle of the road up to a position where the front road 44a seen through the windshield is cut by the vehicle body 44c is defined as a road width angle 44e.

  FIG. 6B shows the relationship between the road shape display (first display image) 44f displayed in the display area D and the HUD image shape display 44g. Here, the horizontal viewing angle of the HUD image shape display 44g viewed from the driver 16 is set as the HUD image shape display width angle (display angle of view) 44h, and the horizontal viewing angle of the road shape display is set as the road shape display width angle (the road ahead of the host vehicle). Width viewing angle) 44i. The display control unit 22 sets and displays the HUD image shape display width angle such that HUD image shape display width angle 44h: HUD road viewing angle 44i = HUD field angle 44d: road width angle 44e. The vertical viewing angle of the HUD shape display 44g is set to a value obtained from the ratio of the horizontal and vertical angle of view of the HUD display image 44b based on the HUD image shape display width angle 44h.

  According to the present embodiment, the driver 16 displays the road shape display 44f and the HUD image shape display 44g on the head-up display so that the relationship between the position and the size of the road shape display 44f and the HUD image shape 44g coincide with each other. From the distance relationship between the display 44g and the caution point display on the road shape display 44f, it is easy to compare the distance relationship between the HUD display image 44b and the road ahead 44a, and the distance to various caution points can be easily grasped in a short time. it can.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible. For example, in the present embodiment, the road shape data is obtained from the storage unit 35, but the road shape data may be obtained by communication from an apparatus having map data inside such as an external navigation unit. Similarly, for the vehicle position detection, the coordinate data of the vehicle position may be obtained from an external device. In this embodiment, the HUD image shape display 44g is a frame in which a key-like display is arranged at the four corners of a rectangle, but icon images representing the contents of right and left turn points and various points of interest are pasted and displayed. You may do it.

20 control means 34 own vehicle position detection means 35 storage unit (storage means)
40 display means 44f road shape display (first display image)
44g HUD image shape display (second display image)
D Display area

Claims (2)

Display means, storage means for storing road shape data, own vehicle position detection means for detecting the own vehicle position, and the display means based on the position data from the own vehicle position detection means and the road shape data Control means for displaying a first display image representing a road shape ahead of the host vehicle in a predetermined display area, and a vehicle head-up display device for stereoscopically displaying the road shape,
The control means converts the first display image and the second display image corresponding to the display area into an optical space between the position data and the road shape data in a three-dimensional space displayed by the display means. A vehicle head-up display device, which is arranged at a position required from the arrangement. The control means includes the ratio of the viewing angle of the second display image to the viewing angle of the first display image from the driver viewpoint, and the display area with respect to the viewing angle of the road width ahead of the vehicle from the driver viewpoint. The vehicle head-up display device according to claim 1, wherein display data that substantially matches a ratio of a display angle of view is generated.

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