3D Augmented Reality Head-Up Display Device

Abstract

The present invention relates to a 3D augmented reality head-up display device, and more particularly, to a 3D augmented reality (AR) head-up display (HUD) device that can greatly expand the field of view (FoV) while significantly reducing the bulk of the device. Unlike existing head-up displays that use an optical mirror to enlarge and project images from a small display panel, the 3D augmented reality head-up display device directly projects images from a large display panel onto a vehicle windshield without using an optical mirror. This makes it very easy to realize an optical viewing angle while minimizing the increase in bulk of the device, and the viewing angle can be further increased by increasing the size or number of display panels.

Description

[Technical Field]

[0001] The present invention relates to a three-dimensional (3D) augmented reality (AR) head-up display (HUD) device, and more particularly to a three-dimensional (3D) augmented reality (AR) head-up display (HUD) device that can significantly expand the field of view (FoV) while significantly reducing the bulk of the device. [Background technology]

[0002] Head-up display devices are seeing a significant increase in adoption to provide driver safety and comfort while driving. Head-up displays display dashboard information such as vehicle speed, fuel level, and engine revolutions per minute, as well as navigation information. In addition to this information, they can also provide a wider variety of information through augmented reality applications.

[0003] For example, lane movement direction, hazards, pedestrian positions, and forward building information can be displayed in alignment with objects or the overall view. However, to achieve this, the displayed virtual image distance must be sufficient to cover the viewing distance while driving, and the viewing angle must be sufficient to cover the lane width.

[0004] However, existing head-up display devices display a virtual image at a fixed distance (generally around 2.5m) and have a small horizontal viewing angle of less than 5 degrees. Recently, prototypes have been developed or released that improve this by increasing the virtual image distance to 10m and the horizontal viewing angle to 10 degrees.

[0005] Figure 1 illustrates the principle of virtual image creation using transparent glass (windshield). The virtual image is formed on the outside of the windshield at a distance equal to the distance between the display and the windshield (W). Therefore, the virtual image distance (VID) cannot be increased without using a magnifying optical mirror. However, since the image is displayed as a virtual image through the transparent glass, the driver can simultaneously see the actual object on the other side of the windshield.

[0006] The configuration of an existing head-up display device is shown in Figure 2. The 2D image generated by the Picture Generation Unit (PGU), which consists of a display panel and a backlight unit located below the display panel, is expanded and distorted using two optical mirrors before being projected onto the windshield, forming a virtual image in front of the driver.

[0007] Such existing head-up display devices use two-dimensional images, so even if the virtual image can be sent further using a magnifying optical mirror, the virtual image is fixed in one position.

[0008] Furthermore, the limit to the magnification ratio of the optical mirror also places a limit on the increase in the virtual image distance.

[0009] In addition, in order to increase the viewing angle, it is unavoidable to increase the size of the magnifying optical mirror, which causes the device to become very bulky, and this poses an issue of securing installation space inside the vehicle.

[0010] Furthermore, the increased intensity of sunlight convergence due to the increased optical magnification rate has raised concerns about the reliability of display panels for long-term use. Meanwhile, the virtual image distance, i.e., the depth of the image representation, is fixed, limiting the realization of true augmented reality, where the depth of the displayed information is perfectly aligned with the object or panoramic view in front of the vehicle.

[0011] However, in the configuration of the present invention, even if a virtual image is formed at a short distance, a 3D image can be realized on the virtual image surface, giving the effect of greatly increasing the virtual image distance. Also, since images can be freely displayed at various distances, it is very suitable for augmented reality expression.

[0012] A 3D image display device attaches an optical plate made of a lenticular lens film or a parallax barrier film to the top of a 2D image display device to separate the light generated from each pixel of a 2D image display device such as an LCD into the left and right eyes, as shown in Figure 3. Then, the left and right images created with a time lag are applied to each pixel, allowing the user to view a 3D image. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0013] In order to solve the above-mentioned problems of the prior art, the 3D augmented reality head-up display device of the present invention projects a large display panel image directly onto the automobile windshield without using an optical mirror, unlike the conventional head-up display devices that use an optical mirror to enlarge and project an image from a small display panel. Therefore, the viewing angle can be greatly expanded while minimizing the increase in the device's bulk.

[0014] In addition, the viewing angle can be increased by simply increasing the size of the display panel or the number of display panels, and the increase in the viewing angle does not significantly increase the bulk of the device, and the purpose is to prevent long-term reliability issues due to solar concentration. [Means for solving the problem]

[0015] The present invention, which aims to solve such technical problems, a 3D image display device including an LCD panel, an optical plate attached to an upper portion of the LCD panel, and a backlight unit disposed below the LCD panel; It comprises an eye-tracking camera positioned to look at the driver.

[0016] The eye tracking camera can also be configured to be separate from the 3D image display device and installed in a position within the dashboard of the vehicle so as to view the driver's eyes.

[0017] The backlight unit is composed of an LED, a collimating lens array, and a diffusion plate, and can be configured so that the maximum light output angle from the LED light source at the edge of the display matches the viewing angle at the center of the eyebox.

[0018] The backlight unit can be configured so that the relative positions of the LED light sources with respect to the lens units in the lens array are gradually shifted to the edges.

[0019] The backlight unit can also be configured by inserting a Fresnel lens into the upper end of the lens array.

[0020] The focal length of the Fresnel lens can be set equal to the virtual image distance.

[0021] The backlight unit can be configured so that an angle control film is disposed between the LCD panel and the diffusion plate.

[0022] In addition, the 3D image display device may be configured by disposing a half-wave plate between the optical plate and the LCD panel and bonding them together.

[0023] The 3D image display device may be configured in a box shape with a dust cover disposed on the top.

[0024] The dust cover may be configured to be arranged in a curved shape that does not directly face the driver and corresponds to the windshield angle.

[0025] In addition, the 3D image display device may be configured to include a case that hides the display so that the display is not directly visible to the driver.

[0026] Also, the 3D image display device can be configured such that at least two LCD panels are connected together.

[0027] The 3D image display device can be configured to be installed in either the driver's seat, the passenger's seat, or between the driver's seat and the passenger's seat.

[0028] In addition, the 3D image display device may be configured such that the placement position and placement angle can be adjusted according to the angle and shape of the windshield in order to realize the virtual image as a vertical rectangular image.

[0029] The 3D image display device can also be configured so that the display is positioned horizontally within the dashboard when the flat windshield is positioned at a 45 degree angle.

[0030] The 3D image display device may be configured such that the display is tilted toward the inside of the windshield when the angle of the flat windshield is greater than 45 degrees.

[0031] In addition, the 3D image display device may be configured such that the display is disposed in a tilted form on the outside of the windshield surface when the angle of the flat windshield is less than 45 degrees.

[0032] In addition, the 3D image display device can be configured so that when a curved windshield is installed, the displays on the left and right side portions are rotated and positioned outside the windshield surface.

[0033] The 3D image display device may be configured such that the displays are arranged in a vertically rotated form on the left and right side of the curved windshield.

[0034] In addition, the 3D image display device may be configured such that the display is arranged in a tilted form toward the inside of the windshield surface when the angle of the curved windshield is greater than 45 degrees.

[0035] In addition, the 3D image display device may be configured such that the display is disposed in a tilted form on the outside of the windshield surface when the angle of the curved windshield is less than 45 degrees.

[0036] The 3D image display device may be configured to correct the input image in order to realize the virtual image as a vertical rectangular image.

[0037] In addition, the 3D image display device can additionally configure ray rendering correction for left and right images by calculating the travel path of light rays that are reflected from the pixel of the LCD panel through the optical plate and hit the windshield surface.

[0038] In addition, the 3D image display device can render 3D images by calculating the accurate path for continuous eye positions and pixel positions using a polynomial model that takes the driver's 3D eye position coordinates and display pixel positions as input and outputs the ray path displayed as a view number.

[0039] The 3D image display device can also be configured in a way that a look-up table is created for the travel path of the light ray and values ​​between them are calculated by interpolation.

[0040] Furthermore, when the 3D image display device uses at least two LCD panels, the positions and angles of the LCD panels can be adjusted according to the shape and arrangement of the windshield. [Effects of the Invention]

[0041] According to the present invention, unlike existing head-up display devices that use an optical mirror to enlarge and project an image from a small display panel, the 3D augmented reality head-up display device of the present invention uses a method in which an image from a large display panel is directly projected onto the automobile windshield without using an optical mirror, making it very easy to realize an optical viewing angle, and the viewing angle can be further increased by increasing the size of the display panel or the number of display panels.

[0042] In addition, to realize augmented reality, the virtual image distance must be created far in order to match the object in front of the vehicle or the entire view. However, since the virtual image is formed outside the windshield at a distance equal to the distance between the display and the windshield, it is not possible to display the virtual image distance far without a magnifying optical mirror. However, the present invention overcomes this problem by using a 3D image display method, and can freely display images at long distances and various depths even with a short virtual image distance.

[0043] In addition, the head-up display device of the present invention can realize a vertical rectangular virtual image with little distortion even without an aspherical optical mirror, which is generally used for distortion correction, by adjusting the placement position and placement angle to reflect the shape and angle of the windshield.It can also realize a 3D image without viewing fatigue by calculating the traveling path of light rays that are reflected from the windshield surface through the optical plate and are then subjected to additional light ray rendering correction for the left and right images.

[0044] In addition, the backlight unit ensures that the maximum light output angle of the LED light source at the edge of the display panel matches the field of view (FoV) at the center of the eyebox in order to maintain uniformity in the light viewing angle within the eyebox area of ​​the head-up display.To achieve this, the relative position of each LED light source to each lens unit in the lens array is gradually shifted toward the edge, or a Fresnel lens is inserted at the top of the lens array to control the light output angle of each LED light source.

[0045] In addition, the 3D augmented reality head-up display device can be configured in a box shape with an additional dust cover placed on top of the 3D image display device, and an eye tracking camera can be installed as an integrated unit. The dust cover can be curved so that it does not look directly at the driver, and can be changed to a shape that corresponds to the windshield angle, and a case can be installed in a shape that hides the display device so that it is not directly visible to the driver. [Brief explanation of the drawings]

[0046] [Figure 1] 1 is a schematic diagram illustrating the principle of realizing a virtual image using transparent glass. [Figure 2] FIG. 1 is a diagram illustrating the configuration of an existing head-up display device. [Figure 3] 1 is a schematic diagram illustrating the implementation principle of a 3D image display device. [Figure 4] 1 is a configuration diagram of a 3D augmented reality head-up display device according to the present invention. [Figure 5] 1 is a diagram illustrating an embodiment of a three-dimensional augmented reality head-up display device according to the present invention. [Figure 6] 1 is a plan view of a single display layout of a three-dimensional augmented reality head-up display device according to the present invention. [Figure 7]1 is a plan view of a dual display arrangement of a 3D augmented reality head-up display device according to the present invention. [Figure 8] 1 is a diagram showing the layout of a dashboard of a 3D augmented reality head-up display device according to the present invention; [Figure 9] 1 is a block diagram illustrating an image distortion interpretation result through adjustment of the placement angle of a 3D augmented reality head-up display device according to the present invention. [Figure 10] 1 is a diagram illustrating a configuration of a 3D augmented reality head-up display device according to the present invention, showing a result of interpretation of distortion correction for a single display; [Figure 11] 1 is a diagram illustrating a configuration of a 3D augmented reality head-up display device according to an embodiment of the present invention, showing a result of interpretation of distortion correction in a dual display; [Figure 12] 1 is a block diagram illustrating a 3D image rendering method for a 3D augmented reality head-up display device according to the present invention; [Figure 13] 3 is a diagram illustrating the configuration of a backlight unit of a 3D augmented reality head-up display device according to the present invention with respect to the light output angle; [Figure 14] 1 is a diagram illustrating an embodiment of a backlight unit of a 3D augmented reality head-up display device according to the present invention. [Figure 15] 1 shows a backlight unit configuration and interpretation image of a 3D augmented reality head-up display device according to the present invention. [Figure 16] 10 is a diagram showing the interpretation results when one display is used. [Figure 17] 10 is a diagram showing the interpretation results when two displays are used. [Figure 18] 10 is a diagram showing the configuration of another embodiment of the backlight unit of the 3D augmented reality head-up display device according to the present invention. FIG. [Figure 19] 1 is a diagram showing another embodiment of a three-dimensional augmented reality head-up display device according to the present invention; [Figure 20] FIG. 10 is a diagram illustrating yet another embodiment of the configuration of a 3D augmented reality head-up display device according to the present invention. [Figure 21] 10 is a diagram showing another embodiment of a 3D augmented reality head-up display device according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0047] The advantages and features of the present invention, and methods for achieving them, will become clearer with reference to the following detailed description of the embodiments accompanied by the accompanying drawings. However, the present invention is not limited to the following embodiments, and may be embodied in various different forms, and includes all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention. The following embodiments are provided to ensure a complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. In describing the present invention, if a detailed description of related prior art is considered to obscure the gist of the present invention, such a detailed description will be omitted. The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprise" or "have" are intended to specify the presence of a specified feature, number, step, operation, component, part, or combination thereof, but do not exclude the possible presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Terms such as "first," "second," etc. may be used to describe various components, but the components should not be limited by these terms. These terms are used only to distinguish one component from another. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, identical or corresponding components will be given the same drawing numbers, and duplicate descriptions thereof will be omitted.

[0048] FIG. 4 is a diagram showing the configuration of a three-dimensional augmented reality head-up display device according to the present invention.

[0049] The 3D augmented reality head-up display device 100 includes a 3D image display device 10 including an LCD panel 20, an optical plate (lenticular lens film or parallax barrier film) 30 attached to the upper part of the LCD panel, and a backlight unit 40 arranged below the LCD panel 20, and an eye tracking camera 50 used to determine the position of the driver's eyes and accurately apply left and right images corresponding to the left and right eyes, respectively, to the 3D image display device 10.

[0050] The eye tracking camera 50 can be integrated with the 3D image display device 10 or can be separately installed in the dashboard of the car at a position where it can view the driver's eyes.

[0051] The backlight unit 40 is preferably a high-brightness backlight having a divergence angle of 10 degrees or less so that the image can be clearly seen even under strong sunlight.

[0052] Since different shapes of windshields (W) are used depending on the automobile model, existing head-up display devices have been manufactured differently to correspond to this, but the display device of the present invention can be universally applied to almost all vehicle models.

[0053] For this reason, the head-up display device 100 of the present invention, which is installed in the dashboard (D) at the bottom of the windshield (W), can easily correct image distortion by changing the placement angle according to the shape and angle of the windshield (W).

[0054] 5(a) and 5(b) are diagrams showing the layout of a 3D augmented reality head-up display device according to the present invention at different windshield angles.

[0055] The virtual image formed in front of the driver through the windshield (W) must be realized as a vertically oriented rectangular image to ensure image quality and uniformity. Since the virtual image is formed symmetrically with respect to the windshield (W) and the 3D image display device 10, when the windshield (W) is angled at 45 degrees as shown in Figure 4, the 3D image display device 10 can be placed horizontally within the dashboard. However, when the windshield (W) is angled at more than 45 degrees, the 3D image display device 10 must be placed tilted inward of the windshield (W) as shown in Figure 5(a).

[0056] Also, if the angle of the windshield (W) is less than 45 degrees, the 3D image display device 10 must be disposed in a state inclined toward the outside of the windshield (W) as shown in FIG. 5(b).

[0057] Furthermore, the placement of the 3D image display device 10 of the present invention should be changed depending on the shape of the windshield (W) to ensure image quality through improved image distortion. In the case of a flat windshield (W1), the 3D image display device 10 of the present invention is preferably placed horizontally relative to the flat windshield (W1) as shown in Fig. 6(a), and in the case of a curved windshield (W2), the 3D image display device 10 is preferably placed rotated outside the curved windshield (W2) on the left and right side as shown in Fig. 6(b). Meanwhile, the 3D image display device 10 can be installed in the driver's seat, passenger seat, or anywhere in between.

[0058] The 3D augmented reality head-up display device 100 according to the present invention can easily increase the viewing angle of the display by increasing the size of the LCD panel 20 of the 3D image display device 10.

[0059] 7(a) and 7(b) show an embodiment in which two LCD panels 20 of the 3D image display device 10 are used to expand the display screen. Of course, if the aspect ratio of the LCD panel 20 is increased significantly, the same effect as with a single panel can be obtained. Also, even when two LCD panels 20 are arranged in a continuous manner, the same arrangement (angle adjustment) as in FIG. 6 can be used. Furthermore, when multiple panels are used, the position and angle of each panel may be adjusted depending on the windshield shape and arrangement position.

[0060] In the case of a flat windshield (W1), the head-up display device 100 of the present invention can be arranged horizontally in the dashboard (D) corresponding to the opposing flat surface of the flat windshield (W1) as shown in Figure 8 (a), and in the case of a curved windshield (W2), it is preferable to arrange the head-up display device 100 in a form where the outer side is rotated vertically on the left and right side sides corresponding to the opposing curved surface of the curved windshield (W2) as shown in Figure 8 (b).

[0061] 9(a) shows a distorted virtual image displayed on the 3D image display device 10 for a 30-degree curved windshield (W2) without reflecting the placement angle adjustments of FIGS. 5, 6, and 8, and FIG. 9(b) shows the distortion correction interpretation result for a 3D image display device 10 for a 30-degree curved windshield (W2) reflecting all of the placement angle adjustments of FIGS. 5, 6, and 8.

[0062] Here, when the 3D image display device 10 is positioned at angles of -55.6 degrees, +3.9 degrees, and -1.9 degrees in the front (x-axis), horizontal (y-axis), and vertical (z-axis) directions, respectively, as shown in Figure 9(a), it can be seen that the distortion of the virtual image can be significantly improved, as shown in Figure 9(b). This interpretation is the result of calculations made with respect to the driver's position, with the position where the display surface of the 3D image display device 10 is vertically set as the reference point (0,0,0), and clockwise rotation is indicated by + and counterclockwise rotation by -.

[0063] The virtual image distortion improved by adjusting the placement angle can be further improved by correcting the input image. Figures 10(a) and 10(b) show the virtual image distortion before and after image correction, and Figures 11(a) and 11(b) show the virtual image distortion before and after additional input image correction when two LCD panels 20 of the 3D image display device 10 are arranged in a continuous manner.

[0064] In Figures 10(a) and 11(a), some distortion remains in the virtual image that has been improved through adjustment of the placement angle as in Figure 9(b), and the distortion can be corrected to a perfect square shape as in Figures 10(b) and 11(b) through additional image correction.

[0065] Even if 2D image distortion is completely corrected in this way, in the case of 3D images, additional rendering correction is required for the left and right images by calculating the path of light rays that are reflected from the display pixel through the optical plate 30 and hit the windshield (W) surface.

[0066] FIG. 12 illustrates a 3D image rendering method for a 3D augmented reality head-up display device according to the present invention, and a 3D image without viewing fatigue can be realized by using this method.

[0067] The path of the light ray is determined by the display pixel position (Px, Py) which is the starting point of the light ray and the driver's 3D eye position coordinates (Ex, Ey, Ez) which are the arrival point of the light ray. Therefore, by determining the display pixel position (Px, Py) and the driver's 3D eye position coordinates (Ex, Ey, Ez) as shown in Figure 12(a) and applying and analyzing a view pattern image with a determined light ray path, it is possible to determine which light ray path is most suitable for each pixel position. Then, using the driver's 3D eye position coordinates and display pixel position (Ex, Ey, Ez, Px, Py) as inputs, a polynomial model (polynomial coefficients) can be obtained which outputs the light ray path displayed at the view number. Therefore, the obtained multivariate polynomial can be used to calculate accurate paths for consecutive eye positions and pixel positions to render a 3D image.

[0068] On the other hand, to obtain an appropriate polynomial model, it is necessary to linearly expand the periodic view numbers with respect to the eye coordinates and pixel positions as shown in Figure 12(b) before performing polynomial regression. This can be done by moving the data in discontinuous sections upward and connecting them.

[0069] In a 3D display, a view refers to a partial image with the same time difference (parallel), and a complete 3D image is composed of several views with different time differences (i.e., different optical paths). The view number of each pixel, corresponding to the number of views, generally has a regular periodicity. View patterns can be configured in various ways, and the 3D image rendering correction of the present invention involves observing and correcting changes in the view pattern of an image (i.e., a virtual image) that is reflected off the windshield (W) surface and displayed.

[0070] Meanwhile, instead of calculating the travel path of the ray in the form of a polynomial, a look-up table may be constructed and values ​​therebetween may be interpolated.

[0071] FIG. 13 is a diagram illustrating the configuration and light output angle of a backlight unit of a 3D augmented reality head-up display device according to the present invention.

[0072] The backlight unit 40 according to the present invention is designed to ensure the desired brightness and uniformity within the viewing area of ​​the image, i.e., the eyebox area. The divergence angle (θ) of the backlight unit 40 required to effectively collect light in the eyebox area can be calculated using the following equation (1):

[0073]

number

[0074] Here, the eyebox size is the size of the area that can be seen when the driver moves horizontally and vertically, and the virtual image distance (VID) is the sum of the distance from the 3D image display device 10 to the windshield (W) and the distance from the windshield (W) to the eyebox (the driver's eye position) (see FIG. 1).

[0075] Such a divergence angle (θ) of the backlight unit 40 can be achieved by using one or two collimating lens arrays 41, the number of which is equal to the number of LEDs generally used in the light source.

[0076] In order to maintain uniformity of the image within the eyebox of the 3D image display device 10, the exit angle of each LED light source must be additionally controlled, and the exit angle (α) to the center of the eyebox can be calculated using the following equation 2.

[0077]

number

[0078] Here, panel position refers to the horizontal and vertical spatial position within the display panel. In conclusion, the maximum light output angle of the LED light source at the display edge must match the field of view (FoV) at the center of the eyebox. Meanwhile, the eyebox edge can be understood as being covered by the divergence angle of the LED light source.

[0079] To achieve this, in the present invention, the relative positions of the LED light sources with respect to each lens unit in the lens array 41 are gradually shifted from the center to the outer edges as shown in Fig. 14(a), or a Fresnel lens 42 is inserted at the top of the lens array 41 as shown in Fig. 14(b) to control the light output angle toward the center. Here, it is preferable to maintain the focal length of the Fresnel lens 42 the same as the virtual image distance (VID).

[0080] In addition, in order to improve the uniformity of the image, a diffuser 43 may be additionally disposed on the upper end of the Fresnel lens 42 and the lower end of the LCD panel.

[0081] FIG. 15 is a diagram showing the configuration of a backlight unit in a 3D augmented reality head-up display device according to the present invention, FIG. 16 is a diagram showing the interpretation results when one display is used, and FIG. 17 is a diagram showing the interpretation results when two displays are used. It can be seen that the target brightness and uniformity can be secured at the center ((1)), edge ((2), (4)), and corner ((3)) positions within the eyebox area.

[0082] Meanwhile, as shown in FIG. 18, an angle control film 44 such as a privacy film can be selectively disposed between the LCD panel 20 and the diffusion plate 43 to control stray light.

[0083] 19 and 20 show another embodiment of a three-dimensional augmented reality head-up display device configuration according to the present invention.

[0084] The brightness of the virtual image seen by the driver is the same as the brightness of the display reflected through the windshield (W). However, the amount of reflected light varies depending on the polarization direction of the display and the angle of incidence on the windshield, as shown in Figure 19. The polarization direction of the display varies depending on the panel manufacturer, but if the display is P-polarized and the windshield angle is 30 degrees (the angle of incidence on the windshield is 60 degrees from the normal), the brightness of the image seen by the driver will be very low.

[0085] Therefore, in such a case, a half-wave plate 35 must be inserted between the optical plate 30 and the LCD panel 20 to reverse the polarization direction by 90 degrees. The optical plate 30 and the half-wave plate 35 can be bonded together through a lamination process.

[0086] 21, the 3D augmented reality head-up display device may be configured in a box shape including a dust cover 71, which may be additionally disposed on the top of the 3D image display device 10. Also, the eye tracking camera 50 may be integrally mounted.

[0087] In addition, the dust cover 71 has a curved shape that does not directly face the driver, and its shape can be changed according to the angle of the windshield (W), and a case can be provided in a shape that hides the display so that it is not directly visible to the driver.

[0088] Figure 21(a) is a diagram illustrating the case where the windshield angle is 45 degrees, Figure 21(b) is a diagram illustrating the case where the windshield angle is 45 degrees or more, and Figure 21(c) is a diagram illustrating the case where the windshield angle is 45 degrees or less.

[0089] Meanwhile, the display of the 3D image display device 10 of the present invention may be implemented using a large flat panel display such as an LCoS panel, an OLED panel, or a DLP panel instead of the LCD panel, or may be implemented using other display panels.

[0090] Therefore, the concept of the present invention is not limited to the above-described embodiments, and all scopes equivalent to or modified in the future equivalent to the claims, as well as the scope of the claims, fall within the scope of the concept of the present invention. Therefore, the concept of the present invention should not be limited to the above-described embodiments, and not only the scope of the claims described below, but also all scopes equivalent to or modified equivalently from the scope of the claims belong to the scope of the concept of the present invention. [Explanation of symbols]

[0091] 10. 3D image display device 20 LCD panels 30 Optical plate 35 Half-wave plate 40 Backlight unit 41 Lens Array 42 Fresnel lens 43 Diffuser 44 Angle control film 50 Eye Tracking Camera 71 Dust cover 100 Head-up display device W: Windshield D. Dashboard α: Light output angle θ: divergence angle

Claims

1. a 3D image display device including an LCD panel, an optical plate attached to an upper portion of the LCD panel, and a backlight unit disposed under the LCD panel; The system includes an eye-tracking camera positioned to view the driver. A three-dimensional augmented reality head-up display device.

2. The eye tracking camera It is separated from the 3D image display device and installed in a position facing the driver's eyes on the dashboard of a car. The three-dimensional augmented reality head-up display device of claim 1 .

3. The backlight unit is It is composed of an LED, a collimating lens array, and a diffusion plate, and is configured so that the maximum light output angle from the LED light source at the edge of the display matches the viewing angle at the center of the eyebox. The three-dimensional augmented reality head-up display device of claim 1 .

4. The backlight unit is The relative positions of the LED light sources with respect to the lens units in the lens array are gradually shifted to the edges. The three-dimensional augmented reality head-up display device according to claim 3 .

5. The backlight unit is It is composed of a Fresnel lens inserted at the top of the lens array. The three-dimensional augmented reality head-up display device according to claim 3 .

6. The focal length of the Fresnel lens is set equal to the virtual image distance.

6. The three-dimensional augmented reality head-up display device of claim 5.

7. The backlight unit is An angle control film was placed between the LCD panel and the diffuser. The three-dimensional augmented reality head-up display device according to claim 3 .

8. The three-dimensional image display device includes: A half-wave plate is placed between the optical plate and the LCD panel and bonded together. The three-dimensional augmented reality head-up display device of claim 1 .

9. The three-dimensional image display device is It is configured in a box shape with a dust cover on top. The three-dimensional augmented reality head-up display device of claim 1 .

10. The dust cover is curved so that it does not face the driver directly and is positioned according to the windshield angle.

10. The three-dimensional augmented reality head-up display device of claim 9.

11. The three-dimensional image display device is It comes with a case that hides the display so that it is not directly visible to the driver. The three-dimensional augmented reality head-up display device of claim 1 .

12. The three-dimensional image display device is At least two LCD panels are arranged in a connected manner. The three-dimensional augmented reality head-up display device of claim 1 .

13. The three-dimensional image display device is It is installed either in the driver's seat, the passenger seat, or between the driver's seat and the passenger seat. The three-dimensional augmented reality head-up display device of claim 1 .

14. The three-dimensional image display device is In order to realize the virtual image as a vertical rectangular image, the position and angle of the display are adjusted according to the angle and shape of the windshield. The three-dimensional augmented reality head-up display device of claim 1 .

15. The three-dimensional image display device is The display is configured to be positioned horizontally within the dashboard when the flat windshield is positioned at a 45-degree angle.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

16. The three-dimensional image display device is When the angle of the flat windshield is greater than 45 degrees, the display is arranged in a tilted form on the inside of the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

17. The three-dimensional image display device is If the angle of the flat windshield is less than 45 degrees, the display is positioned at an angle to the outside of the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

18. The three-dimensional image display device is When a curved windshield is installed, the displays on the left and right side are configured to be rotated and positioned outside the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

19. The three-dimensional image display device is When a curved windshield is installed, the displays on the left and right side are configured to be rotated vertically.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

20. The three-dimensional image display device is When the angle of the curved windshield is greater than 45 degrees, the display is arranged in a tilted form on the inside of the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

21. The three-dimensional image display device is When the angle of the curved windshield is less than 45 degrees, the display is arranged in a tilted form on the outside of the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

22. The three-dimensional image display device is It is configured to correct the input image to realize a virtual image as a vertical rectangular image.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

23. The three-dimensional image display device is The ray rendering correction for the left and right images is added by calculating the path of light rays that are reflected from the LCD panel pixel through the optical plate to the windshield surface.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

24. The three-dimensional image display device is It is configured to render 3D images by calculating the accurate path for continuous eye positions and pixel positions using a polynomial model that inputs the driver's 3D eye position coordinates and display pixel positions and outputs the ray path displayed by the view number.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

25. The three-dimensional image display device is The path of the light rays is calculated by constructing a lookup table and interpolating the values ​​between them.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

26. The three-dimensional image display device is When at least two LCD panels are used, the position and angle of each LCD panel can be adjusted according to the shape and position of the windshield.

15. A three-dimensional augmented reality head-up display device according to claim 1 or 14.

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