Head-up display device and manufacturing method therefor for a vehicle

Abstract

Head-up display device for a vehicle, which features: a lower housing (100); an aspherical mirror (110) with opposite ends, each formed with spherical bearing parts (120) that rotatably attach the aspherical mirror (110) to the lower housing; a plurality of disc springs (510), each of the disc springs (510) being positioned above one of the spherical bearing parts (120) to limit the displacements of the spherical bearing parts (120); and an image shield (500) having one or more combination holes (600) configured to be coupled to the disc springs (510) and configured to be coupled to the lower housing (100), wherein the lower case (100) has: a plurality of receiving blocks (130) designed to receive the spherical bearing parts (120) from below and designed in a shape adapted to the spherical bearing parts (120) in order to prevent any play against the spherical bearing parts (120), wherein at least one of the receiving blocks (130) has a support unit (140), wherein one or more of the support units (140) are inclined in the direction of an axis of rotation of the aspherical mirror (110).

Description

CROSS-REFERENCE TO RELATED REGISTRATIONS

[0001] The present application is based on and claims priority of Korean patent application No. 10-2020-0055031, filed on May 8, 2020, the disclosure of which is incorporated in its entirety by reference into the present application. TECHNICAL AREA

[0002] The present disclosure relates in some embodiments to a head-up display device for vehicles and a manufacturing method therefor. More precisely, the present disclosure relates in its entirety to a head-up display device and a manufacturing method therefor for vehicles, wherein the head-up display device comprises an aspherical mirror whose axis of rotation is optimally designed and positioned. BACKGROUND

[0003] The statements in this section merely provide background information to the present disclosure and do not necessarily represent the state of the art.

[0004] The automotive market is evolving towards smarter vehicles equipped with advanced information technology. In particular, products to support driving stability and driver comfort are being launched, with head-up displays (HUDs) being of special interest.

[0005] A head-up display (HUD) is a device that projects an image onto the windshield or windscreen of a vehicle, displaying information such as vehicle speed, fuel level, and direction. The HUD generally works by reflecting head-up display information projected by a picture graphics unit (PGU) through an aspherical mirror and projecting it onto the windscreen. The HUD is also designed to respond to changing conditions, including the driver's eye level, by rotating the aspherical mirror around its reflection angle and adjusting the height of the information projected onto the windscreen.

[0006] However, when rotating, the aspherical mirror is subject to vibrations or external shocks caused by driving, which leads to a change in its axis of rotation, causing the information displayed on the windscreen to shift or become blurred.

[0007] The relevant prior art for solving this disadvantage includes the Japanese patent application No. JP2018-192962 A entitled “Head-up Display Device”.

[0008] However, these and other prior art solutions cannot prevent play from occurring in a fixed section of the aspherical mirror when a large external force is applied to it. Furthermore, conventional head-up display devices suffer from increased manufacturing costs due to the use of a large number of parts to mount the aspherical mirror. OVERVIEW

[0009] According to at least one embodiment, the present disclosure provides a head-up display device for a vehicle comprising a lower housing, an aspherical mirror, a plurality of disc springs, and an image screen. The aspherical mirror has opposite ends, each formed with spherical bearing elements that rotatably mount the aspherical mirror to the lower housing. Each of the disc springs is positioned above one of the spherical bearing elements to limit displacement of the spherical bearing elements. The image screen has at least one or more combination holes configured to couple with the disc springs, and the image screen is configured to couple with the lower housing.The lower housing features a plurality of receiving blocks designed to accommodate the spherical bearing elements from below. These blocks are shaped to fit the spherical bearing elements, eliminating any play. At least one of the receiving blocks incorporates a support unit, with one or more of these support units being inclined towards an axis of rotation of the aspherical mirror.

[0010] The mounting blocks can be in a vertical orientation with the disc springs.

[0011] The shape adapted to the spherical bearing parts can include the form of a V-shaped block.

[0012] The spherical bearing components can be secured against displacement in the direction of the x-axis, the y-axis and the z-axis by the mounting blocks and the disc springs.

[0013] The lower housing may have one or more vertical mounting grooves, the height of which is greater than the diameter of each of the spherical bearing parts and which may be designed to create screw connections with the image shield.

[0014] Each of the disc springs can protrude in one direction to be in contact with each of the spherical bearing parts by a difference between the height of the vertical mounting groove and the diameter of each spherical bearing part, thus fixing each spherical bearing part.

[0015] In addition, each of the disc springs can have a snap-in fastening structure which detachably attaches the disc springs to the combination holes of the image shield.

[0016] Each of the disc springs can have a sliding unit designed to fix the spherical bearing part and a hook unit designed to attach the disc spring to the combination opening by means of a snap-in mechanism.

[0017] The head-up display device may further include a drive unit connected to the lower housing and to the aspherical mirror to rotate the aspherical mirror, and may include a control unit configured to control the drive unit to reposition head-up display information by rotating the aspherical mirror.

[0018] The drive unit may further comprise: a stepper motor designed to be driven under the control of the control unit; a leadscrew connected to the stepper motor and designed to convert a rotary motion of the stepper motor into a linear motion; and a rotary joint unit connected to the aspherical mirror and the leadscrew and designed to rotate the aspherical mirror.

[0019] Another embodiment of the present disclosure provides a method for manufacturing a head-up display device for a vehicle, comprising: forming an aspherical mirror with spherical bearing elements at opposite ends of the aspherical mirror, which rotatably mount the aspherical mirror to a lower housing; forming a plurality of receiving blocks in the lower housing, each having a shape adapted to the spherical bearing elements to prevent any play against the spherical bearing elements; forming one or more vertical mounting grooves in the lower housing, the height of which is greater than the diameter of each of the spherical bearing elements; receiving the spherical bearing elements in the receiving blocks; coupling a plurality of disc springs to an image screen at one or more combination holes formed in the image screen;and coupling the image shield, to which the disc springs are coupled, by means of screw connections to the vertical mounting grooves. Here, the disc springs provide a predetermined preload that limits displacement of the spherical bearing parts.

[0020] Forming the receiving blocks in the lower housing to have a shape adapted to the spherical bearing parts may include forming a support unit in at least one of the receiving blocks, wherein one or more of the support units are inclined in the direction of a rotation axis of the aspherical mirror.

[0021] Forming the receiving blocks in the lower housing to have a shape adapted to the spherical bearing parts may involve forming the shape adapted to the spherical bearing parts as a V-shaped block.

[0022] The coupling of the disc springs with the combination holes of the image shield can include the detachable attachment of the disc springs to the combination holes of the image shield to create a snap-in fastening structure.

[0023] The coupling of the image shield, to which the disc springs are coupled by screw connections with the vertical mounting grooves, can include coupling the receiving blocks in vertical orientation with the disc springs.

[0024] The coupling of the image shield, to which the disc springs are coupled by screw connections to the vertical mounting grooves, can include arranging each of the disc springs so that they protrude in one direction to be in contact with each of the spherical bearing parts by a difference between the height of the vertical mounting groove and the diameter of each spherical bearing part, thereby fixing each spherical bearing part. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows an illustration illustrating an exemplary manner in which an aspherical mirror is attached to a lower housing, according to at least one embodiment of the present disclosure. Fig. Figure 2 shows a cross-sectional view of the lower housing and the aspherical mirror, cut in the direction of the axis of rotation (II-II) of the aspherical mirror. Fig. Figure 3 shows a cross-sectional view of the lower housing and the aspherical mirror, cut in the direction of the y-axis (III-III) of the aspherical mirror. Fig. Figure 4 shows a cross-sectional view of the lower housing and the aspherical mirror, cut in the direction of the y-axis (IV-IV) of the aspherical mirror. Fig. 5A and Fig. Figure 5B shows cross-sectional views illustrating an exemplary manner in which an image shield and disc springs are combined and coupled to a lower housing, with spherical bearing parts of the aspherical mirror arranged between them, according to at least one embodiment of the present disclosure. Fig. Figure 6 shows an illustration illustrating an exemplary manner in which disc springs are attached to an image screen according to at least one embodiment of the present disclosure. Fig. Figure 7 shows a cross-sectional view illustrating an exemplary manner in which a spherical bearing part is fastened by means of a disc spring and a screw connection, according to at least one embodiment of the present disclosure. Fig. 8A and Fig. Figure 8B shows illustrations of a head-up display device for a vehicle, which is designed to have a rotatable aspherical mirror, according to at least one embodiment of the present disclosure. Fig. Figure 9 shows an exploded view of the components of a head-up display device for a vehicle according to at least one embodiment of the present disclosure. REFERENCE MARK 100 lower case 110 aspherical mirror 120 spherical bearing parts 130 recording blocks 140 support unit 150 x-axis reference plane 300 first recording 400 second recording 410 vertical mounting groove 500 image shielding 510 Belleville spring 600 combination hole 610 sliding unit 620 hook unit 700 screw connection 800 drive unit 810 stepper motor 820 Lead screw 830 Rotary joint unit 840 first connecting link 850 second connecting link DETAILED DESCRIPTION

[0025] To solve these problems, at least one embodiment of the present disclosure provides a head-up display device for vehicles and a manufacturing method for it, wherein an aspherical mirror is provided whose axis of rotation is optimally designed and positioned to prevent any play at the mounting points of the aspherical mirror and to reduce the manufacturing costs of the head-up display device.

[0026] Some embodiments of the present disclosure are described below with reference to the accompanying drawings. In the following description, identical reference numerals preferably denote identical elements, even though the elements are shown in different drawings. Furthermore, for the sake of clarity and brevity, a detailed description of known functions and configurations contained herein is omitted in the following description of some embodiments.

[0027] Furthermore, alphanumeric codes such as first, second, i), ii), a), b), etc., are used in the numbering of components only to distinguish one component from another, but not to imply or suggest the substances, order, or sequence of the components. When parts in this specification "contain" or "feature" a component, this means that they also include, and do not exclude, other components, unless a specific description states otherwise.

[0028] Fig. Figure 1 shows an illustration illustrating an exemplary manner in which an aspherical mirror 110 is attached to a lower housing 100, according to at least one embodiment of the present disclosure.

[0029] Fig. Figure 2 shows a cross-sectional view of the lower housing 100 and the aspherical mirror, cut in the direction of the axis of rotation (II-II) of the aspherical mirror 110.

[0030] Fig. Figure 3 shows a cross-sectional view of the lower housing 100 and the aspherical mirror 110, cut in the direction of the y-axis (III-III) of the aspherical mirror 110.

[0031] Fig. Figure 4 shows a cross-sectional view of the lower housing 100 and the aspherical mirror 110, cut in the direction of the y-axis (IV-IV) of the aspherical mirror 110.

[0032] As in the Fig. As shown in Figures 1 to 4, a head-up display device for a vehicle according to at least one embodiment of the present disclosure comprises a lower housing 100, an aspherical mirror 110, vertical mounting grooves 410, and a plurality of mounting blocks 130. For the sake of simplicity, this will be referred to below as follows: Fig. 9 described.

[0033] The lower housing 100 is mounted in a vehicle and serves to support the lower section of the aspherical mirror 110 and to protect the aspherical mirror 110 from external impacts.

[0034] The aspherical mirror 110 has opposite ends, each formed with spherical bearing elements 120 for rotatable attachment to the lower housing 100. Therefore, the aspherical mirror 110 can be rotatably mounted to the lower housing 100. The head-up display device is generally configured to reflect a head-up display image projected onto the aspherical mirror 110 by an image generation unit (PGU, not shown) using a tilting mirror (not shown), causing the image reflected from the aspherical mirror 110 to be displayed on a windshield (not shown). However, the head-up display device can also be configured such that the PGU projects the head-up display image directly onto the aspherical mirror 110, and the head-up display image reflected from the aspherical mirror 110 is displayed on the windshield.

[0035] Taking into account the changing eye level of the driver, it is advantageous to reposition the head-up display information accordingly. By appropriately rotating the aspherical mirror 110 to match the driver's eye level, the position at which the image is reflected on the windshield can be adjusted.

[0036] The vertical mounting grooves 410 are incorporated in the lower housing 100 and can be formed integrally with the lower housing 100. The vertical mounting grooves 410 are designed such that their height is greater than the diameter of the spherical bearing elements 120 and are located on both opposite sides of the lower housing 100.

[0037] The mounting blocks 130 are contained within the lower housing 100 and are arranged below the spherical bearing part 120 so that the spherical bearing part 120 can be placed on them. The mounting blocks 130 are also designed in a shape adapted to the spherical bearing parts 120 in order to prevent any play between the spherical bearing parts 120 and the mounting blocks 130. The adapted shape is preferably a V-shape so that the spherical bearing parts 120 can be securely positioned regardless of manufacturing tolerances. Furthermore, the use of V-shaped mounting blocks 130 in the present disclosure prevents movement of the spherical bearing parts 120 in the direction of the y- and z-axes and their rotation in the β- and γ-directions, while minimizing any potential play against the spherical bearing parts 120.

[0038] The receiving blocks 130 are divided by their positions into a first receiving block 300 on one side of the drive unit 800 and a second receiving block 400 on the opposite side of the drive unit 800.

[0039] At least one of the mounting blocks 130 has a support unit 140 for supporting the spherical bearing part 120, and one or more support units 140 of the mounting blocks 130 can be configured such that they are inclined in the direction of the axis of rotation of the aspherical mirror 110, i.e., inclined in the direction of the x-axis. Preferably, however, the support unit 140 of the block on the opposite side of the drive part 800, i.e., the second mounting block 400, is configured such that it is inclined towards the first mounting block 300.

[0040] In particular, the left side of the first mounting block 300 is in contact with an x-axis reference plane 150 of the lower housing 100, while the support unit 140 of the second mounting block 400 is designed to be inclined in the direction of the first mounting block 300, i.e., inclined in the direction of the x-axis. Since the aspherical mirror 110 is forced by gravity in the direction of the x-axis reference surface 150, it can accordingly be prevented from moving the aspherical mirror 110 in the direction of the x-axis. However, it is not necessary for the second mounting block 400 to be inclined on the opposite side of the drive unit 800 alone, and the block to be inclined can be determined otherwise, taking into account the position of the drive unit 800 and the position of the x-axis reference plane 150.

[0041] Fig. 5A and Fig. Figure 5B shows cross-sectional views illustrating an exemplary manner in which an image shield 500 and a plurality of disc springs 510 are combined and coupled to the lower housing 100, with spherical bearing parts 120 of the aspherical mirror 110 arranged between them, according to at least one embodiment of the present disclosure.

[0042] Fig. Figure 5A shows a cross-sectional view, which shows that the image shield 500 and the lower housing 100 are combined and that the spherical bearing part 120 located on the side of the drive unit 800 is in between.

[0043] Fig. Figure 5B shows a cross-sectional view showing that the image shield 500 and the lower housing 100 are combined, with the spherical bearing part 120 located on the opposite side of the drive unit 800 in between.

[0044] Fig. Figure 6 shows an illustration illustrating an exemplary manner in which the disc springs 510 are attached to the image shield 500, according to at least one embodiment of the present disclosure.

[0045] Fig. Figure 7 shows a cross-sectional view illustrating an exemplary manner in which a spherical bearing part 120 is fastened by means of a disc spring 510 and a screw connection 700, according to at least one embodiment of the present disclosure.

[0046] As in the Fig. As shown in Figures 5 to 7, the head-up display device for a vehicle according to at least one embodiment of the present disclosure further comprises all or some of the disc springs 510 and the image shield 500.

[0047] The disc springs 510 are located above the spherical bearing elements 120 and limit the displacement of the spherical bearing elements 120 with a predetermined holding force. This prevents the aspherical mirror 110 from vibrating its axis of rotation during rotation or from moving the spherical bearing elements 120 in the direction of the z-axis. To prevent the aspherical mirror 110 from moving in the direction of the z-axis, the disc springs 510 are preferably aligned vertically to the mounting blocks 130.

[0048] Therefore, one or more of the support units 140 of the V-shaped receiving blocks 130 is inclined in the direction of the axis of rotation, i.e. in the direction of the x-axis, and the disc springs 510 press down the upper sections of the spherical bearing parts 120, thereby subjecting the aspherical mirror 110 to a holding force in the direction of the x-axis, the y-axis and the z-axis.

[0049] The image shield 500 has combination holes 600, which are spaces for coupling with the disc springs 510, and is coupled to the lower housing 100. The image shield 500 has a surface to which a hinged mirror can be coupled to reflect the image projected by the PGU onto the aspherical mirror 110.

[0050] The coupling of the image shield 500 to the lower housing 100 is achieved by coupling the image shield 500 to the vertical mounting grooves 410 of the lower housing 100 on both sides. The coupling method preferably, but not exclusively, includes screw connections 700 to prevent the coupling from easily coming loose.

[0051] As in Fig. As shown in Figure 6, the disc springs 510 each provide a snap-in fastening structure for detachable attachment to the combination hole 600 of the image shield 500. The disc spring 510 can have a sliding unit 610 and / or hook units 620 for the snap-in fastening structure.

[0052] These sliding units 610 serve to fix the spherical bearing parts 120 to the mounting blocks 130. To fix the spherical bearing parts 120, the sliding units 610 protrude downwards from the combination holes 600 of the image shield 500 by a predetermined distance, and they are designed to directly contact the upper sections of the spherical bearing parts 120.

[0053] The hook units 620 are designed such that the disc spring 510 can be attached to each combination hole 600 of the image shield 500 by means of a snap-in mechanism. The hook units 620 are each shaped as a hook with a curved end so that the disc spring 510 can both be attached to and detached from the combination opening 600 of the image shield 500 by means of a snap-in mechanism.

[0054] As in Fig. As shown in Figure 7, the spherical bearing part 120 is placed on the first mounting block 300, and the disc spring 510 secures the spherical bearing part 120 in the direction of the z-axis. However, if the spherical bearing part 120 is secured solely by the disc spring 510, the application of a large external force could cause it to separate from the first mounting block 300. Therefore, it is preferable to prevent separation of the spherical bearing part 120 by increasing the binding force in the direction of the z-axis, by securing the image shield 500 through the screw connection 700 in the vertical mounting groove 410 of the lower housing 100.

[0055] On the other hand, the disc spring 510 projects towards the spherical bearing part 120 by the difference between the height of the vertical mounting groove 410 and the diameter of the spherical bearing part 120, until it comes into contact with the spherical bearing part 120. The projecting length of the disc spring 510 can be referred to as the overhang, whereby the disc spring 510 secures the spherical bearing part 120 with a spring force proportional to the overhang. In order to utilize the spring force of the disc springs 510, the vertical mounting groove 410 is therefore preferably designed such that it has a height that is greater than the diameter of the spherical bearing part 120.

[0056] As described above, the spherical bearing elements 120 of the aspherical mirror 110 can only move by the amount of their projection when the image shield 500, combined with the disc springs 510, is screwed onto the vertical mounting grooves 410 of the lower housing 100, unless a sufficient impact is applied to damage the screw connection 700. Accordingly, the movement of the aspherical mirror 110 is restricted in the directions of the x, y, and z axes, as well as in the β and γ directions, and may only rotate in the α direction.

[0057] Fig. 8A and Fig. Figure 8B shows illustrations depicting a head-up display device for a vehicle, designed such that the aspherical mirror 110 is rotatable, according to at least one embodiment of the present disclosure.

[0058] Fig. Figure 8A shows an exploded view showing the aspherical mirror 110 and the drive unit 800 alone outside the head-up display device for a vehicle according to at least one embodiment of the present disclosure.

[0059] Fig. Figure 8B shows a side view showing the aspherical mirror 110 and the drive unit 800 alone outside the head-up display device for a vehicle according to at least one embodiment.

[0060] The head-up display device for a vehicle according to at least one embodiment comprises all or some of the drive unit 800, as shown in the Fig. 8A and Fig. 8B shown, and a control unit (not shown).

[0061] The drive unit 800 is connected to the lower housing 100 and the aspherical mirror 110 and is designed to rotate the aspherical mirror 110. The control unit controls the movement of the drive unit 800 to change the position at which the head-up display information is shown, according to the driver's eye level.

[0062] The drive unit 800 includes all or some of a stepper motor 810, a leadscrew 820 and a rotary joint unit 830 to rotate the aspherical mirror 110.

[0063] The stepper motor 810 is driven by the control unit, and the leadscrew 820 is connected to the stepper motor 810 to convert its rotary motion into linear motion. However, it is not necessary to rotate the aspherical mirror 110 using the control unit, and a driver may be able to adjust the aspherical mirror 110 manually while monitoring the height of the head-up display information.

[0064] The rotary joint unit 830 is connected to the aspherical mirror 110 and the leadscrew 820, such that the aspherical mirror 110 rotates in accordance with the drive of the stepper motor 810. For example, the rotary joint unit 830 can have a first connecting element 840 that moves up and down in accordance with the rotation of the leadscrew 820, and a second connecting element 850 that is connected to the first connecting element 840 and rotates the aspherical mirror 110 in accordance with the vertical movement of the first connecting element 840. In this case, the first connecting element 840 can be designed with a groove to allow the second connecting element 850 to move horizontally.

[0065] If the driver's eye level changes due to a driver change or seat height adjustment, the control unit calculates the position of the head-up display information suitable for the driver's eye level and rotates the aspherical mirror 110 to display the head-up display information at the calculated position. The driver's eye level information can be entered directly by the driver or automatically detected by a separate eye-level detection device (not shown) located in the vehicle.

[0066] Fig. Figure 9 shows an exploded view of the components of a head-up display device for a vehicle according to at least one embodiment of the present disclosure.

[0067] Fig.Figure 9 shows a lower housing 100 and an aspherical mirror 110, at the opposite ends of which spherical bearing elements 120 are formed to rotate the aspherical mirror 110. The lower housing 100 is formed with receiving blocks 130 (visible under reference numeral 400) which have a shape adapted to the spherical bearing elements 120 in order to receive them while preventing any play against the spherical bearing elements 120. The receiving blocks 130 each have support units 140, and one or more of the support units 140 can be designed to be inclined in the direction of the axis of rotation of the aspherical mirror 110. The lower housing 100 is further formed with vertical mounting grooves 410, which can form screw connections 700 with an image shield 500.

[0068] The image shield 500 is designed with combination holes 600 to which disc springs 510 can be coupled, and the disc springs 510 can be coupled to the image shield 500 in a detachable snap-fit ​​structure. The image shield 500, combined with the disc springs 510, can be coupled to the vertical mounting grooves 410 by means of the screw connections 700.

[0069] A drive unit 800 can be connected to the lower housing 100 and the aspherical mirror 110 to rotate the latter.

[0070] As described above, the head-up display device for a vehicle can be manufactured in a maximally optimized design by providing the mounting blocks 130 with a shape adapted to accommodate the spherical bearing part 120, while eliminating any play between them. Accordingly, when the aspherical mirror 110 needs to be rotated to the driver's eye level, it can do so with stability, preventing any play due to external forces. Furthermore, no additional parts are required to prevent movement of the aspherical mirror 110 along the x, y, and z axes and rotation in the β and γ directions, thus reducing the manufacturing costs of the head-up display device for a vehicle.

[0071] As described above, according to some embodiments, the present disclosure can prevent play at the mounting points of the aspherical mirror by optimizing the structure of the aspherical mirror and minimizing the components, and reduce the manufacturing costs of the head-up display device.

[0072] Although exemplary embodiments of the present disclosure have been described for illustrative purposes, it is apparent to those skilled in the art that various modifications, additions, and substitutions are possible without deviating from the idea and scope of the claimed invention. Therefore, the exemplary embodiments of the present disclosure have been described for the sake of brevity and clarity. The scope of the technical idea of ​​the present embodiments is not limited by the illustrations. Accordingly, a person skilled in the art would understand that the scope of the claimed invention is not to be limited by the embodiments explicitly described above, but rather by the claims and their equivalents.

Claims

[1] Head-up display device for a vehicle, comprising: a lower housing (100); an aspherical mirror (110) having opposite ends each formed with spherical bearing members (120) rotatably mounting the aspherical mirror (110) to the lower housing; a plurality of disc springs (510), each of the disc springs (510) being positioned above one of the spherical bearing parts (120) to limit the displacements of the spherical bearing parts (120); and an image shield (500) having one or more combination holes (600) configured to couple to the disc springs (510) and configured to couple to the lower housing (100), wherein the lower housing (100) comprises: a plurality of receiving blocks (130) which are designed to receive the spherical bearing parts (120) from below and are designed in a shape adapted to the spherical bearing parts (120) in order to allow no play against the spherical bearing parts (120), wherein at least one of the receiving blocks (130) has a support unit (140), wherein one or more of the support units (140) are inclined in the direction of a rotation axis of the aspherical mirror (110). [2] The head-up display device according to claim 1, wherein the receiving blocks (130) are formed to be in vertical alignment with the disc springs (510). [3] The head-up display device according to claim 1, wherein the shape adapted to the spherical bearing parts (120) has a shape of a V-shaped block. [4] Head-up display device according to claim 3, wherein the spherical bearing parts (120) are formed so that they are secured against displacement in the directions of the x-axis, the y-axis and the z-axis by the receiving blocks (130) and the disc springs (510). [5] The head-up display device according to claim 1, wherein the lower case (100) comprises: one or more vertical fastening grooves (410) whose height is greater than a diameter of each of the spherical bearing parts (120) and which are designed to produce screw connections (700) with the image shield (500). [6] A head-up display device according to claim 5, wherein each of the disc springs (510) is formed to protrude in a direction by a difference between the height of the vertical fixing groove (410) and the diameter of each spherical bearing part (120) to be in contact with each of the spherical bearing parts (120). [7] The head-up display device according to claim 1, wherein each of the disc springs (510) has a snap-in fastening structure that detachably attaches the disc springs (510) to the combination holes (600) of the screen (500). [8] A head-up display device according to claim 7, wherein each of the disc springs (510) comprises: a sliding unit (610) designed to fix the spherical bearing parts (120); and a hook unit (620) configured to fasten the disc spring (510) to the combination hole by snapping into place. [9] The head-up display device according to claim 1, further comprising: a drive unit (800) connected to the lower housing and connected to the aspherical mirror (110), the drive unit (800) being configured to rotate the aspherical mirror (110); and a control unit configured to control the drive unit (800) to reposition head-up display information by rotating the aspherical mirror (110). [10] The head-up display device according to claim 9, wherein the drive unit (800) further comprises: a stepper motor (810) configured to be driven under the control of the control unit; a lead screw (820) connected to the stepper motor (810) and configured to convert a rotary motion of the stepper motor (810) into a linear motion; and a rotary connection unit (830) connected to the aspherical mirror (110) and the lead screw (820) and configured to rotate the aspherical mirror (110). [11] A method of manufacturing a head-up display device for a vehicle, the method comprising: Forming an aspherical mirror (110) having spherical bearing members (120) at opposite ends of the aspherical mirror (110) that rotatably mount the aspherical mirror (110) to a lower housing (100); Forming a plurality of receiving blocks (130) in the lower housing (100), each of which has a shape adapted to the spherical bearing parts (120) so as not to allow any play against the spherical bearing parts (120); Forming one or more vertical mounting grooves (410) in the lower housing (100) whose height is greater than a diameter of each of the spherical bearing parts (120); Placing the spherical bearing parts (120) in the receiving blocks (130); coupling a plurality of disc springs (510) to an image shield (500) at one or more combination holes (600) formed in the image shield (500); and Coupling the screen, to which the disc springs (510) are coupled, by means of screw connections (700) with the vertical fastening grooves (410), wherein the disc springs (510) provide a predetermined preload that limits displacement of the spherical bearing parts (120). [12] The method according to claim 11, wherein forming the receiving blocks (130) in the lower housing (100) to have a shape adapted to the spherical bearing parts (120) comprises forming a support unit (140) in at least one of the receiving blocks (130), wherein one or more of the support units (140) are inclined in the direction of a rotation axis of the aspherical mirror (110). [13] The method of claim 11, wherein forming the receiving blocks (130) in the lower housing (100) to have a shape adapted to the spherical bearing parts (120) comprises forming the shape adapted to the spherical bearing parts (120) as a V-shaped block. [14] The method of claim 11, wherein coupling the disc springs (510) to the combination holes (600) of the image shield (500) comprises releasably attaching the disc springs (510) to the combination holes (600) of the image shield to form a snap-in attachment structure. [15] The method of claim 11, wherein coupling the screen (500) to which the disc springs (510) are coupled by screw connections (700) to the vertical mounting grooves (410) comprises coupling the receiving blocks (130) in vertical alignment with the disc springs (510). [16] The method according to claim 11, wherein coupling the screen (500) to which the disc springs (510) are coupled to the vertical fixing grooves (410) by screw connections (700) comprises arranging each of the disc springs (510) to protrude in a direction to contact each of the spherical bearing parts (120) by a difference between the height of the vertical fixing groove (410) and the diameter of each spherical bearing part (120), thereby fixing each spherical bearing part (120).

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