KR20230072128A - Head-up display device and method for vehicle - Google Patents

Abstract

The present invention relates to a vehicle head-up display device and method. The vehicle head-up display device includes: a plurality of image generation parts embedded in a vehicle body, and configured to provide flat and stereoscopic images in multiple directions; an optical induction part configured to guide an image signal, provided by the image generation parts, in one direction; and a display part configured to implement the image signal, provided by the optical induction part, as an image recognizable by a driver, thereby implementing the augmented reality of a head-up display.

Description

Vehicle head-up display apparatus and method {HEAD-UP DISPLAY DEVICE AND METHOD FOR VEHICLE}

The present invention relates to an apparatus and method for a head-up display for a vehicle implementing augmented reality, and more particularly, a plurality of image generating units may superimpose a 3D virtual image on a real image or a background through an optical system and display the image as a single image. It relates to a vehicle head-up display device and method capable of implementing augmented reality.

In general, while driving a vehicle, a driver drives while checking vehicle information such as driving speed, engine rotational speed, and fuel amount displayed on a front instrument panel. Since the front instrument panel is located in front of the driver's seat of the instrument panel and the driver has to look down to check vehicle information, the risk of accidents is high because the driver cannot continuously look ahead.

In order to solve this problem, recently, a head-up display (hereinafter referred to as HUD) device that visualizes vehicle information is installed on the windshield glass of the vehicle. The head-up display projects various information of the vehicle in operation It consists of a projector that reflects the projected image, a reflector that reflects the projected image, and a projector that projects the reflected image onto the windshield glass. Since the image projected on the windshield glass is displayed in front of the vehicle through the driver's vision, the driver can observe the image together with the forward view while driving.

However, since the conventional head-up display provides only a virtual image on the windshield glass, there is a problem in that it cannot provide information on a real image recognized in the driver's field of view while driving. Therefore, there is a need to improve this.

The background art of the present invention is published in Republic of Korea Patent Publication No. 2005-0010429 (published on January 27, 2005, title of the invention: head-up display image position control device).

The present invention has been made to improve the above problems, and a plurality of image generating units for a vehicle capable of implementing augmented reality in which a 3D virtual image is superimposed on a real image or a background through an optical system and displayed as a single image. An object of the present invention is to provide a head-up display device and method.

A head-up display device for a vehicle according to the present invention includes: an optical induction unit guiding an image signal provided from the image generation unit in one direction; and a display unit in which the image signal provided through the optical induction unit is realized as an image recognizable by a driver.

The image generating unit is arranged to face one side of the optical induction unit to provide a flat image; and a second generating unit that is obliquely disposed on the other side of the optical induction unit and provides a three-dimensional image.

an induction mirror unit in which two triangular prisms coated with a transmissive material are bonded to the optical induction unit and guide the images of the first generation unit and the second generation unit in one direction; and a curvature mirror unit for guiding the image signal passing through the induction mirror unit to the display unit.

It is characterized in that a reflective coating layer is formed in the bonding area of the induction mirror unit.

The image generating unit is arranged to face one side of the optical induction unit to provide a flat image; a second imaging unit disposed to face the other side of the optical induction unit and providing a flat image; and a third imaging unit which is inclinedly disposed on another side surface of the optical induction unit and provides a stereoscopic image.

an induction lens unit to which four triangular prisms coated with a transmissive material are bonded to the optical induction unit, and to guide images of the first imaging unit, the second imaging unit, and the third imaging unit in one direction; and a curvature lens unit for guiding the image signal passing through the induction lens unit to the display unit.

It is characterized in that a reflective coating layer is formed in the junction area of the induction lens unit.

A distance between the first image unit and the induction lens unit is different from a distance between the second image unit and the induction lens unit.

A distance between the first image unit and the induction lens unit and a distance between the second image unit and the induction lens unit are distances of movement of light.

A head-up display method for a vehicle according to the present invention includes: an image providing step of providing flat and stereoscopic images in multiple directions by a plurality of image generators built into a vehicle body; an image guiding step of guiding the image signal provided from the image generating unit in one direction by an optical induction unit; and an image implementation step in which the display unit implements the image signal provided through the optical induction unit into an image recognizable by the driver.

In the head-up display apparatus and method for a vehicle according to the present invention, since the image generating unit provides a flat image recognized as a short distance and a stereoscopic image recognized as a long distance, augmented reality can be implemented in the head-up display.

1 is a diagram schematically illustrating a head-up display device for a vehicle according to an embodiment of the present invention.
2 is a diagram schematically illustrating an image generating unit according to an embodiment of the present invention.
3 is a diagram schematically illustrating an optical induction unit when two image generating units are provided according to an embodiment of the present invention.
4 is a diagram schematically illustrating an image generating unit according to another embodiment of the present invention.
5 is a diagram schematically illustrating an optical induction unit when three image generating units are present according to another embodiment of the present invention.
6 is a flowchart schematically illustrating a method for a head-up display for a vehicle according to an embodiment of the present invention.

Hereinafter, embodiments of a head-up display device and method for a vehicle according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a diagram schematically illustrating a head-up display device for a vehicle according to an embodiment of the present invention. Referring to FIG. 1 , a head-up display device 1 for a vehicle according to an embodiment of the present invention includes an image generating unit 10 , an optical guidance unit 20 , and a display unit 30 .

The plurality of image generators 10 are built into the vehicle body and provide planar and stereoscopic images in multiple directions, respectively. For example, a picture generation unit (PGU) may be used as the image generating unit 10 .

The optical induction unit 20 guides the image signal provided from the image generating unit 10 in one direction. For example, the optical induction unit 20 may induce an image signal inside the vehicle body. An image signal guided inside the vehicle body by the optical guidance unit 20 may be moved to the outside of the vehicle body.

The display unit 30 implements an image signal provided through the optical guidance unit 20 as an image recognizable by a driver. For example, the display unit 30 may be formed on a windshield. In addition, the head-up display device 1 for a vehicle may be modularized and mounted on a vehicle body, and the display unit 30 may be rotated to serve as a combiner for recognizing image signals to a driver.

Figure 2 is a diagram schematically showing an image generating unit according to an embodiment of the present invention, Figure 3 is a diagram schematically showing an optical induction unit when two image generating units according to an embodiment of the present invention. Referring to FIGS. 2 and 3 , the image generator 10 according to an embodiment of the present invention includes a first generator 11 and a second generator 12 .

The first generating unit 11 is arranged to face one side of the optical induction unit 20 to provide a flat image. For example, the first generating unit 11 may display a vehicle state. This vehicle state can be vehicle-related information (speed gauge, driving mode, target reach distance, etc.) or notification and status display (communication, unexpected situation, vehicle abnormal state).

The second generating unit 12 is disposed obliquely on the other side of the optical induction unit 20 to provide a stereoscopic image. For example, the second generator 12 may give a sense of distance to the image by transmitting the display image obliquely in a lateral direction rather than in a frontal direction. The second generating unit 12 may display the road surface condition. In addition, the second generation unit 12 may provide a navigation driving guide (left turn, right turn, straight ahead, speed limit, etc.) or display of active response to the driving environment (keep distance between vehicles, collision assistance, speed display of preceding vehicle, etc.). there is.

Meanwhile, the second generating unit 12 may irradiate an optical signal to the optical induction unit 20 so as to have an inclination a by itself or through side reflection in a state of being disposed obliquely without facing the optical induction unit 20 . At this time, the slope (a) may be designed to be greater than 0 degrees and less than 40 degrees. The image provided through the second generator 12 makes the driver feel farther than the image provided by the first generator 11, and augmented reality can be implemented.

Meanwhile, the optical induction unit 20 according to an embodiment of the present invention includes an induction mirror unit 21 and a curvature mirror unit 22 .

In the induction mirror unit 21, two triangular prisms coated with a transmissive material are joined, and the images of the first generator 11 and the second generator 12 are guided in one direction. For example, the induction mirror unit 21 may form a regular hexahedron by joining the first mirror unit 211 and the second mirror unit 212, which are triangular prisms. A reflective coating layer may be formed in a junction region between the first mirror unit 211 and the second mirror unit 212 . The reflective coating layer induces reflection through aluminum deposition, induces refraction using a UV refracting resin, splits light into orthogonal polarization states using a birefringent material, or conversely induces an image introduced in multiple directions into one direction. . Incident light introduced into one side of the first mirror unit 211 is reflected by the reflective coating layer and may pass through the other side of the first mirror unit 211 . Incident light introduced into one side of the second mirror unit 212 symmetrical to the first mirror unit 211 and one side may be refracted by the reflective coating layer and pass through the other side of the first mirror unit 211. there is.

The curvature mirror unit 22 guides the image signal passing through the induction mirror unit 21 to the display unit 30 . For example, the curvature mirror unit 22 may have a rounded shape to align the focus of image signals reaching the display unit 30 .

In addition, the transmission mirror unit 23 is formed on the interior material and is disposed below the display unit 30 to transmit the image signal reflected by the curvature mirror unit 22 .

4 is a schematic diagram of an image generator according to another embodiment of the present invention, and FIG. 5 is a schematic diagram of an optical induction unit when three image generators are provided according to another embodiment of the present invention. 4 and 5, the image generator 10 according to an embodiment of the present invention includes a first image unit 41, a second image unit 42, and a third image unit 43. include

The first image unit 41 is arranged to face one side of the optical induction unit 20 to provide a flat image. For example, the first image unit 41 may display a vehicle state. This vehicle state can be vehicle-related information (speed gauge, driving mode, target reach distance, etc.) or notification and status display (communication, unexpected situation, vehicle abnormal state).

The second image unit 42 is arranged to face the other side of the optical induction unit 20 to provide a flat image. For example, the second image unit 42 may display a vehicle state. This vehicle state can be vehicle-related information (speed gauge, driving mode, target reach distance, etc.) or notification and status display (communication, unexpected situation, vehicle abnormal state).

The third image unit 43 is disposed obliquely with respect to the other side of the optical guide unit 20 to provide a stereoscopic image. For example, the third image unit 43 may give a sense of distance to the image by transmitting the display image obliquely in a lateral direction rather than in a frontal direction. The third image unit 43 may display the condition of the road surface. In addition, the third image unit 43 may provide a navigation driving guide (left turn, right turn, straight ahead, speed limit, etc.) or display of active response to the driving environment (keep distance between vehicles, collision assistance, speed display of preceding vehicle, etc.). there is.

On the other hand, the third image unit 43 may irradiate an optical signal to the optical induction unit 20 so as to have an inclination (b) through self or side reflection in a state of being disposed obliquely without facing the optical induction unit 20 . At this time, the slope (b) may be designed to be greater than 0 degrees and less than 40 degrees. The image provided through the third image unit 43 makes the driver feel farther than the images provided from the first image unit 41 and the second image unit 42, and augmented reality can be implemented.

Meanwhile, the optical induction unit 20 according to an embodiment of the present invention includes an induction lens unit 51 and a curvature lens unit 52.

The induction lens unit 51 is composed of four triangular prisms coated with a transmissive material, and images of the first imaging unit 41, the second imaging unit 42, and the third imaging unit 43 are displayed in one direction. guide For example, in the induction lens unit 21, a first lens unit 511, which is a triangular prism, a second lens unit 512, a third lens unit 513, and a fourth lens unit 514 are bonded together. A cube can be formed. A reflective coating layer may be formed in bonding regions of the first lens unit 511 , the second lens unit 512 , the third lens unit 513 , and the fourth lens unit 514 . The reflective coating layer induces reflection through aluminum deposition, induces refraction using a UV refracting resin, splits light into orthogonal polarization states using a birefringent material, or conversely induces an image introduced in multiple directions into one direction. . Such a reflective coating layer may be selectively applied to induce an optical signal.

The first lens unit 511 and the second lens unit 512 are disposed to face each other, and the third lens unit 513 and the fourth lens unit 514 are disposed to face each other. Meanwhile, incident light introduced into the first lens unit 511 may be reflected and pass through the fourth lens unit 514 . Incident light introduced into the second lens unit 512 may be reflected and pass through the fourth lens unit 514 . Incident light introduced into the third lens unit 513 may pass through the facing fourth lens unit 514 .

The curvature lens unit 52 guides the image signal passing through the induction lens unit 51 to the display unit 30 . For example, the curvature lens unit 52 may have a rounded shape to align the focus of image signals reaching the display unit 30 .

In addition, the transmission lens unit 53 is formed on the interior material and is disposed under the display unit 30 to transmit the image signal reflected by the curvature lens unit 52 .

Meanwhile, the distance (x) between the first image unit 41 and the induction lens unit 51 and the distance (y) between the second image unit 42 and the induction lens unit 51 are different. For example, if the distance (y) between the second image unit 42 and the induction lens unit 51 is longer than the distance (x) between the first image unit 41 and the induction lens unit 51, the first The image provided by the second image unit 42 is recognized as being further away than the image provided by the image unit 41, so that a three-dimensional effect can be given. On the other hand, the distance (x) between the first image unit 41 and the induction lens unit 51 and the distance (y) between the second image unit 42 and the induction lens unit 51 are the light movement distances in addition to the distance between parts. can mean The movement distance of the light may be increased through light reflection.

6 is a flowchart schematically illustrating a method for a head-up display for a vehicle according to an embodiment of the present invention. Referring to FIG. 6 , the method for a head-up display for a vehicle according to an embodiment of the present invention may include providing an image ( S10 ), guiding an image ( S20 ), and implementing an image ( S30 ).

In the image providing step (S10), a plurality of image generators 10 built into the vehicle body provide flat and stereoscopic images in multiple directions, respectively. For example, the image generator 10 may include a first generator 11 that provides a flat image and a second generator 12 that provides a three-dimensional image. At this time, the second generator 12 may provide a stereoscopic image by irradiating an optical signal in an oblique direction.

In the image guidance step (S20), the optical guide unit 20 guides the image signal provided from the image generator 10 in one direction. For example, the optical induction unit 20 may implement images provided from a plurality of image generating units 10 on a single screen using a beam splitter. That is, the optical induction unit 20 has a regular hexahedron shape by bonding a plurality of prisms, and when two or more image generating units 10 incident light to different surfaces of the optical induction unit 20 as needed, the optical induction unit ( 20) may move the light to one side.

In the image implementation step (S30), the display unit 30 implements the image signal provided through the optical guidance unit 20 as an image recognizable by the driver. At this time, the image signal provided from the first generator 11 may be recognized as a near image, and the image signal provided from the second generator 12 may be recognized as a far image.

The operation of the apparatus and method for a head-up display for a vehicle according to an embodiment of the present invention having the above configuration will be described below.

When the first generation unit 11 and the second generation unit 12 irradiate an image to the induction mirror unit 21 (see FIGS. 2 and 3), the induction mirror unit 21 flows into the first surface The image signal of the first generation unit 11 passes through the third surface of the induction mirror unit 21, is reflected upward from the curvature mirror unit 22, and reaches the display unit 30. At this time, the driver can recognize the vehicle state provided by the first generating unit 11 . Then, the image signal of the second generating unit 12 flowing into the second surface of the induction mirror unit 21 passes through the third surface of the induction mirror unit 21 and is reflected upward by the curvature mirror unit 22. and reach the display unit 30. At this time, the driver can recognize the road surface conditions provided by the second generating unit 12 . Meanwhile, it may be recognized that the image provided by the second generator 12 is farther than the first generator 11 .

When the first imaging unit 41, the second imaging unit 42, and the third imaging unit 43 irradiate images to the induction lens unit 51 (see FIGS. 4 and 5), the induction lens unit The image signal of the first image unit 41 introduced to the first surface of (51) passes through the fourth surface of the induction lens unit 51 and is reflected upward by the curvature lens unit 52 to display the display unit 30. reach At this time, the driver can recognize the vehicle state provided by the first image unit 41 . Then, the image signal of the second image unit 42 flowing into the second surface of the induction lens unit 51 passes through the fourth surface of the induction lens unit 52 and is reflected upward by the curvature lens unit 52. and reach the display unit 30. At this time, the driver can recognize the vehicle condition provided by the second image unit 42 . Finally, the image signal of the third image unit 43 introduced to the third surface of the induction lens unit 51 passes through the fourth surface of the induction lens unit 51 and travels upward from the curvature lens unit 52. It is reflected and reaches the display unit 30 . At this time, the driver can recognize the road condition provided by the third image unit 43 . On the other hand, it can be recognized that the image provided by the third image unit 43 is farther away than the first image unit 41 and the second image unit 42, and the first image unit 41 and the second image unit 43 can be recognized. The perspective of the image can be recognized due to the difference in the position of the unit 42 or the moving distance of the light.

In the head-up display apparatus and method for a vehicle according to an embodiment of the present invention, since the image generator 10 provides a flat image recognized as a short distance and a stereoscopic image recognized as a long distance, augmented reality can be implemented in a head-up display. there is.

The present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments. will understand Therefore, the true technical protection scope of the present invention should be determined by the claims below.

10: image generator 11: first generator
12: second generating unit 20: optical induction unit
21: induction mirror unit 22: curvature mirror unit
30: display unit 41: first image unit
42: second video unit 43: third video unit
51: induction lens unit 52: curvature lens unit

Claims (10)

A plurality of image generators built into the vehicle body and providing flat and three-dimensional images in multiple directions, respectively;
an optical induction unit for guiding the image signal provided from the image generation unit in one direction; and
and a display unit in which the image signal provided through the optical induction unit is realized as an image recognizable by a driver.
The method of claim 1, wherein the image generating unit
a first generating unit disposed to face one side of the optical induction unit and providing a flat image; and
A head-up display device for a vehicle comprising a; second generating unit that is obliquely disposed on the other side of the optical induction unit and provides a stereoscopic image.
The method of claim 2, wherein the optical induction unit
an induction mirror unit to which two triangular prisms coated with a transmissive material are bonded, and guides the images of the first generation unit and the second generation unit in one direction; and
and a curvature mirror unit for guiding the image signal passing through the induction mirror unit to the display unit.
According to claim 3,
A head-up display device for a vehicle, characterized in that a reflective coating layer is formed in the bonding area of the induction mirror unit.
The method of claim 1, wherein the image generating unit
a first imaging unit disposed to face one side of the optical induction unit and providing a flat image;
a second imaging unit disposed to face the other side of the optical induction unit and providing a flat image; and
A head-up display device for a vehicle comprising a; third imaging unit which is inclinedly disposed on another side surface of the optical induction unit and provides a stereoscopic image.
The method of claim 5, wherein the optical induction unit
an induction lens unit to which four triangular prisms coated with a transmissive material are joined, and which guides images of the first image unit, the second image unit, and the third image unit in one direction; and
and a curvature lens unit for guiding the image signal passing through the induction lens unit to the display unit.
According to claim 6,
A head-up display device for a vehicle, characterized in that a reflective coating layer is formed in the bonding area of the induction lens unit.
According to claim 6,
A head-up display device for a vehicle, characterized in that a distance between the first image unit and the induction lens unit is different from a distance between the second image unit and the induction lens unit.
According to claim 8,
A head-up display device for a vehicle, characterized in that a distance between the first image unit and the induction lens unit and a distance between the second image unit and the induction lens unit are light movement distances.
An image providing step in which a plurality of image generators built into the vehicle body provide flat and stereoscopic images in multiple directions, respectively;
an image guiding step of guiding the image signal provided from the image generating unit in one direction by an optical induction unit; and
A head-up display method for a vehicle, comprising: a display unit implementing an image signal provided through the optical induction unit into an image recognizable by a driver.

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