Head-up display

Abstract

A head-up display includes: a lower case; an aspherical mirror, the aspherical mirror including a first spherical mounting portion and a second spherical mounting portion located at a first end portion and a second end portion of the aspherical mirror, the first spherical mounting portion and the second spherical mounting portion being mounted in mounting grooves formed at the first end portion and the second end portion of the lower housing, respectively; and an upper module disposed at an upper portion of the aspherical mirror and coupled to the lower housing, in which the aspherical mirror includes a rigidity enhancing portion between the first spherical mounting portion and the second spherical mounting portion.

Description

[0001] Citations of Related Applications

[0002] This application claims the benefit of priority of Korean Patent Application No. 10-2023-0143001 filed in Korea on October 24, 2023, and Korean Patent Application No. 10-2023-0152503 filed on November 7, 2023, which are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure relates to a head-up display (HUD). Background Art

[0004] The content described in this section merely provides background information related to one embodiment of the present disclosure and does not constitute prior art.

[0005] The head-up display is assembled by pressing the spherical mounting parts formed on both ends of the aspherical mirror using the surrounding screen part and the elastic body. Specifically, when an external force is applied, the movement of the spherical mounting part is restricted by the surrounding screen part. In this case, the movement range of the elastic body is also restricted within a limited movement range. However, since the aspherical mirror moves within the elastic range of the elastic body, the spherical mounting part can be assembled without permanent deformation.

[0006] The aspherical mirror is formed based on a cantilever structure. As a result of measuring the stiffness of the aspherical mirror using modal analysis, the stiffness of the aspherical mirror is considered to be lowest in the central area. In this case, modal analysis is an analysis that finds the natural frequency of a structure and the modal vibration shape of the structure.

[0007] Even if the structure of the aspherical mirror is assumed to be a simply supported beam subjected to uniformly distributed load, the maximum bending moment and maximum deflection are highest in the central area of ​​the simply supported beam. Therefore, when external force is continuously applied to the central area of ​​the aspherical mirror, problems such as fracture and adhesion may occur. Summary of the invention

[0008] A head-up display comprises: a lower shell; an aspherical mirror, comprising a first spherical mounting portion and a second spherical mounting portion located at a first end and a second end of the aspherical mirror, the first spherical mounting portion and the second spherical mounting portion being mounted in mounting grooves respectively formed at the first end and the second end of the lower shell; an upper module, arranged at an upper portion of the aspherical mirror and connected to the lower shell, wherein the aspherical mirror comprises a rigidity reinforcement portion located between the first spherical mounting portion and the second spherical mounting portion.

[0009] The rigidity enhancing portion is formed to protrude from a central region of the aspherical mirror.

[0010] The rigidity reinforcing portion includes a receiving groove in which an elastic body having a predetermined elastic force and a guide protrusion arranged at an end of the elastic body are received.

[0011] The rigidity reinforcement portion includes a plurality of ribs on an outer surface of the rigidity reinforcement portion.

[0012] The lower housing includes a receiving portion on an inner surface of the lower housing for receiving the guide protrusion, and when the aspherical mirror rotates, the guide protrusion moves in contact with the inner surface of the receiving portion.

[0013] The receiving portion includes a V-shaped groove on an inner surface of the receiving portion, and includes a guide groove formed by bending the inner surface of the receiving portion one or more times.

[0014] The guide groove includes a first rotation section in which the aspherical mirror rotates within a first angle range, and a second rotation section in which the aspherical mirror rotates within a second angle range.

[0015] The elastic body generates a larger elastic force in the second rotation section than in the first rotation section.

[0016] At least one of the mounting grooves includes a stopper portion that restricts movement of the aspherical mirror due to an elastic force applied by the rigidity reinforcing portion.

[0017] The stopper portion is formed or arranged on an inner surface of at least one of the mounting grooves at a position corresponding to a direction of an elastic force applied by the rigidity reinforcing portion.

[0018] A head-up display device comprises: a lower shell; an aspheric mirror, the aspheric mirror comprising: a first spherical mounting portion and a second spherical mounting portion, respectively located at the first end and the second end of the aspheric mirror and mounted inside the lower shell; and a rigidity enhancement portion formed at the rear side of the aspheric mirror; a driving module coupled to the aspheric mirror and configured to rotate the aspheric mirror; a connecting portion connected between the driving module and the aspheric mirror; and a first elastomer and a second elastomer, wherein the first elastomer and the second elastomer are connected to the rigidity enhancement portion to enhance the rigidity of a central area of ​​the aspheric mirror.

[0019] The rigidity enhancing portion is formed integrally with the aspherical mirror.

[0020] The rigidity reinforcing portion includes a first engaging portion to which a first end portion of the first elastic body is engaged, and a first fitting portion to which a first end portion of the second elastic body is fitted.

[0021] The lower shell includes: a second joining portion, in which the second end of the first elastomer is joined to the second joining portion at an area corresponding to the first joining portion based on the first elastomer; and a second fitting portion, in which the second end of the second elastomer is fitted to the second fitting portion at an area corresponding to the first fitting portion based on the second elastomer.

[0022] The second engaging portion and the second fitting portion are integrally formed with the lower housing.

[0023] The second elastic body is configured to maintain a bent state when a first end of the second elastic body is coupled to the first mating portion and a second end of the second elastic body is coupled to the second mating portion.

[0024] When the aspherical mirror is rotated by a predetermined angle from an initial position of the first elastic body, displacement of the first elastic body increases, and a compressive force of the first elastic body is proportional to the rotation angle of the aspherical mirror.

[0025] When the aspherical mirror is rotated by a predetermined angle from an initial position of the second elastic body, the displacement of the second elastic body is reduced, and the tensile force of the second elastic body is proportional to the rotation angle of the aspherical mirror.

[0026] The driving module includes: a motor configured to generate a driving force to rotate the aspheric mirror; a lead screw extending and connected to a rotating shaft of the motor; and a coupling portion engaged to the lead screw to move up and down along the lead screw and including a groove, wherein the connecting portion includes a positioning pin, which can be slidably engaged in the groove of the coupling portion and can move in a predetermined direction in the groove.

[0027] When the positioning pin moves in a predetermined direction in the groove, the first elastic body and the second elastic body provide elastic force to eliminate a gap formed between the positioning pin and the groove.

[0028] In view of the above circumstances, one embodiment of the present disclosure provides a head-up display capable of increasing the rigidity of an aspherical mirror by using an elastic body in a rigidity reinforcing portion formed in a central area of ​​the aspherical mirror.

[0029] A head-up display according to one embodiment may limit the movement of the first spherical mounting portion and the second spherical mounting portion using a stopper portion formed in a mounting groove in which an aspherical mirror is mounted.

[0030] Furthermore, another embodiment of the present disclosure provides a head-up display device capable of increasing the rigidity of an aspherical mirror by using a first elastic body and a second elastic body in a rigidity reinforcing portion formed in a central region of the aspherical mirror.

[0031] A head-up display according to another embodiment may limit the movement of the first spherical mounting portion and the second spherical mounting portion using a stopper portion formed in a mounting groove in which an aspherical mirror is mounted.

[0032] However, the objects achieved by the present disclosure are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an exploded perspective view showing a head-up display according to one embodiment of the present disclosure.

[0034] Figure 2 is a perspective view showing a head-up display excluding an upper module according to one embodiment of the present disclosure.

[0035] Figure 3 is a perspective view showing an aspherical mirror according to one embodiment of the present disclosure.

[0036] Figure 4 It is along Figure 2 A cross-sectional view taken along line AA in FIG.

[0037] Figure 5 is a schematic diagram showing a coupling relationship between a lower housing and an aspherical mirror according to an embodiment of the present disclosure.

[0038] Figure 6 is an exploded perspective view showing a head-up display device according to another embodiment of the present disclosure.

[0039] Figure 7 is a plan view showing a head-up display device according to another embodiment of the present disclosure.

[0040] Figure 8 is along Figure 7 A cross-sectional view taken along line AA in FIG.

[0041] Fig. 9 is a schematic diagram illustrating an operating state of a first elastic body and a second elastic body when an aspherical mirror according to another embodiment of the present disclosure is rotated. DETAILED DESCRIPTION

[0042] Hereinafter, some exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, although elements are shown in different drawings, the same reference numerals preferably represent the same elements. In addition, in the following description of some embodiments, for the purpose of clarity and brevity, the detailed description of known functions and known configurations incorporated therein will be omitted.

[0043] In addition, various terms such as first, second, A, B, (a), (b), etc. are only used to distinguish one component from another, and do not imply or indicate the substance, order or sequence of the components. Throughout this specification, unless otherwise specified, when a part "includes" or "contains" a component, the part is intended to also include other components rather than exclude other components. Terms such as "unit", "module", etc. refer to one or more units for processing at least one function or operation, and the at least one function or operation can be implemented by hardware, software or a combination thereof.

[0044] Figure 1 is an exploded perspective view showing a head-up display according to one embodiment of the present disclosure.

[0045] Figure 2 is a perspective view showing a head-up display excluding an upper module according to one embodiment of the present disclosure.

[0046] refer to Figure 1 and Figure 2 The head-up display 100 includes some or all of an upper module 110 , an aspherical mirror 120 , a screen 130 , a printed circuit board (PCB) 140 , a lower housing 150 , and a picture generating unit 160 .

[0047] The upper module 110 may be disposed on the upper portion of the head-up display 100. The upper module 110 may include an upper housing 111. Figure 2 Although not shown in the figure, the upper module 110 may further include a cover lens (not shown). The cover lens may be fixed to the top of the upper housing 111.

[0048] The aspherical mirror 120 may include a first spherical mounting portion 121 and a second spherical mounting portion 122 .

[0049] The aspherical mirror 120 may reflect the display information projected by the picture generation unit 160 and emit it toward the windshield of the vehicle.

[0050] The aspherical mirror 120 is mounted to the lower housing 150 to be rotatable. In this case, a first spherical mounting portion 121 and a second spherical mounting portion 122 may be mounted to the lower housing 150 .

[0051] The head-up display 100 is generally configured to reflect a display image projected by the picture generation unit 160 using a folding mirror (not shown) through the aspherical mirror 120, and to display the image reflected by the aspherical mirror 120 on a windshield (not shown). However, the head-up display 100 may be configured so that the picture generation unit 160 projects the display image directly onto the aspherical mirror 120 and displays the display image reflected by the aspherical mirror 120 on the windshield.

[0052] When the driver's eye height changes, it is desired that the display position of the display information corresponds to the change in the driver's eye height. By properly rotating the aspherical mirror 120, the position of the display information where the image is reflected on the windshield can be adjusted.

[0053] The enclosure 130 may be coupled to the top of the aspherical mirror 120. The enclosure 130 may be coupled to the lower housing 150 by a threaded connection. When the enclosure 130 and the lower housing 150 are coupled, the enclosure 130 may restrict the movement of the aspherical mirror 120, for example, in the Z-axis direction.

[0054] The surrounding screen 130 may guide the display image generated by the image generating unit 160 toward the aspherical mirror 120 .

[0055] The PCB 140 may be coupled inside the lower case 150 .

[0056] The PCB 140 may be connected to a driving module (not shown) for rotating the aspherical mirror 120. The driving module may generate torque using a motor to rotate the aspherical mirror 120.

[0057] The lower housing 150 may be disposed at the bottom of the head-up display 100. The lower housing 150 has an accommodation space for accommodating the PCB 140, the aspherical mirror 120, the surrounding screen 130, and the like.

[0058] The lower housing 150 includes a receiving portion 151 .

[0059] The receiving portion 151 may receive the guide protrusion 123 that moves as the aspherical mirror 120 rotates. In this case, the guide protrusion 123 may be disposed at the rear of the aspherical mirror 120. The guide protrusion 123 may move while contacting one side surface of the receiving portion 151.

[0060] The picture generation unit 160 is formed on one side of the lower housing 150. Figure 2 , the picture generating unit 160 is shown to be disposed on the side surface of the lower housing 150 , but the present disclosure is not limited thereto. The picture generating unit 160 may be disposed on the lower surface of the lower housing 150 .

[0061] Figure 3is a perspective view showing an aspherical mirror 120 according to one embodiment of the present disclosure.

[0062] Figure 4 It is along Figure 2 A cross-sectional view taken along line AA in FIG.

[0063] refer to Figures 1 to 4 The aspherical mirror 120 according to one embodiment of the present disclosure includes a rigidity reinforcing portion 300. The rigidity reinforcing portion 300 is formed to protrude from a central region of the aspherical mirror 120.

[0064] The rigidity reinforcing part 300 may be formed to protrude from the rear of the aspherical mirror 120. In this case, the rear of the aspherical mirror 120 refers to the side opposite to the front of the aspherical mirror 120. The front of the aspherical mirror 120 refers to a surface capable of reflecting an image of the head-up display 100 emitted by the picture generation unit 160.

[0065] The rigidity reinforcing part 300 may have a tapered shape whose diameter decreases as the distance from the aspherical mirror 120 increases. The rigidity reinforcing part 300 includes a plurality of ribs 302 on an outer surface thereof. The plurality of ribs 302 are formed to maintain the rigidity of the rigidity reinforcing part 300.

[0066] exist Figure 3 and Figure 4 , the rigidity enhancement part 300 according to one embodiment of the present disclosure is shown as protruding upward from the rear of the aspherical mirror 120, but the present disclosure is not limited thereto. The rigidity enhancement part 300 according to another embodiment may be formed to protrude downward or laterally from the rear of the aspherical mirror 120.

[0067] The rigidity reinforcement part 300 has a receiving groove 301 therein. The inner shape of the receiving groove 301 may be a columnar shape. However, the inner shape of the receiving groove 301 is not limited thereto.

[0068] The elastic body 124 and the guide protrusion 123 are accommodated in the accommodation groove 301. The diameter of the elastic body 124 and the diameter of the guide protrusion 123 correspond to the diameter of the accommodation groove 301.

[0069] The elastic body 124 is completely inserted into the receiving groove 301. The elastic body can be a spring.

[0070] The guide protrusion 123 may be partially inserted into the accommodation groove 301. The guide protrusion 123 partially protrudes from the accommodation groove 301 and contacts the guide groove 152 formed inside the lower housing 150. When the aspherical mirror 120 rotates, the guide protrusion 123 may move along the guide groove 152. One end portion of the guide protrusion 123 contacting the guide groove 152 may have a rounded head shape.

[0071] The other end of the guide protrusion 123 is arranged to contact the elastic body 124. When the displacement of the elastic body 124 has a negative value or a positive value, the position of the guide protrusion 123 in the receiving groove 301 changes. The guide protrusion 123 is arranged to contact one of the plurality of guide grooves 152 formed in the receiving portion 151. When the aspherical mirror 120 rotates, the guide protrusion 123 can move while maintaining contact with the guide groove 152.

[0072] The guide groove 152 forms a first rotation section and a second rotation section.

[0073] The first rotation section refers to a section in which the aspherical mirror 120 does not rotate frequently. That is, the first rotation section may refer to a rotation section of the aspherical mirror 120 when the head-up display 100 is in an inactive state or an active state.

[0074] On the other hand, the second rotation section refers to a section in which the aspherical mirror 120 rotates relatively frequently. That is, based on the activation of the head-up display 100, the second rotation section may refer to a rotation section of the aspherical mirror 120 when the driver is driving. Therefore, in the second rotation section, the elastic body 124 is compressed and has a negative displacement, thereby generating a greater elastic force.

[0075] The second rotation section is formed by bending inwardly from the first rotation section.

[0076] The guide groove 152 is formed as a V-shaped groove, for example, so that the guide protrusion 123 rotates in a specific section of the first rotation section and the second rotation section. When the aspherical mirror 120 rotates, the guide protrusion 123 moves while contacting the V-shaped groove.

[0077] The aspherical mirror 120 may rotate at a first angle in a first rotation section. In this case, the first angle may be an angle of a section where the aspherical mirror 120 does not rotate frequently. For example, when the head-up display 100 is enabled, the aspherical mirror 120 may rotate in a section within the first angle.

[0078] The aspherical mirror 120 may rotate a second angle in a second rotation section. In this case, the second angle may be an angle of a section in which the aspherical mirror 120 rotates relatively frequently. For example, when the vehicle is traveling, the head-up display 100 tracks the driver's eye-box in real time. The aspherical mirror 120 may rotate within a second angle range corresponding to the driver's eye-box. This is because the driver's eye-box moves according to the height of the seat, the angle of the backrest, the driver's posture, etc.

[0079] Assume that when the aspherical mirror 120 rotates in the first rotation section, the elastic force of the elastomer 124 is, for example, F1. In addition, assume that when the aspherical mirror 120 rotates in the second rotation section, the elastic force of the elastomer 124 is, for example, F2. The elastic force F2 is greater than the elastic force F1. This is because the elastomer 124 is compressed more in the second rotation section than in the first rotation section. Since the second rotation section is formed by bending inward from the first rotation section, the guide protrusion 123 partially enters the accommodating groove 301 and compresses the elastomer 124. Therefore, compared with when the aspherical mirror 120 rotates in the first rotation section, the elastic force of the elastomer 124 is greater when the aspherical mirror 120 rotates in the second rotation section.

[0080] The head-up display 100 according to one embodiment of the present disclosure may enhance the rigidity of the central area of ​​the aspherical mirror 120 using the elastic force of the elastic body 124 in the second rotation section in which the aspherical mirror 120 is frequently driven.

[0081] Figure 5 is a schematic diagram showing a coupling relationship between the lower housing 150 and the aspherical mirror 120 according to one embodiment of the present disclosure.

[0082] refer to Figure 4 and Figure 5 , the elastic body 124 applies an elastic force Fk to the aspherical mirror 120. The elastic force Fk applied by the elastic body 124 is transferred to the mounting groove 500 based on the center point P0 of the first spherical mounting portion 121.

[0083] The lower housing 150 includes mounting grooves 500 at both ends of the lower housing. Figure 5 Only the mounting groove 500 corresponding to the first spherical mounting portion 121 is shown in the figure, but hereinafter, the mounting groove 500 in which the first spherical mounting portion 121 is mounted may be used for the description of the second spherical mounting portion 122.

[0084] The mounting groove 500 may include a first mounting groove (not shown) and a second mounting groove (not shown). The first spherical mounting portion 121 and the second spherical mounting portion 122 may be mounted in the first mounting groove and the second mounting groove, respectively.

[0085] The shape of the mounting groove 500 may be formed, for example, in a "V" shape to prevent a gap after coupling with the first spherical mounting portion 121. However, the shape of the mounting groove 500 is not limited thereto. For example, the shape of the mounting groove 500 is preferably formed so that the first spherical mounting portion 121 can be mounted without considering the tolerance of the lower housing 150.

[0086] According to one embodiment of the present disclosure, the mounting groove 500 includes a stopping portion 501 .

[0087] The stopping portion 501 may be integrally formed on one side of the mounting groove 500. However, the stopping portion 501 may be coupled or attached to the mounting groove 500 as a separate portion.

[0088] The stopper portion 501 may limit the movement of the aspherical mirror 120. For example, when the elastic force Fk of the elastic body 124 is applied to one side of the receiving groove 301 based on the center point P0 of the first spherical mounting portion 121, the aspherical mirror 120 may vibrate due to the elastic force Fk. In this case, the stopper portion 501 may limit the movement of the aspherical mirror 120 in the direction in which the elastic force is applied to prevent the aspherical mirror 120 from vibrating.

[0089] Figure 6 is an exploded perspective view showing a head-up display device according to another embodiment of the present disclosure.

[0090] Figure 7 is a plan view showing a head-up display device according to another embodiment of the present disclosure.

[0091] refer to Figure 6 and Figure 7 A head-up display 600 according to another embodiment of the present disclosure includes some or all of an upper module 610 , a surrounding screen portion 630 , an aspherical mirror 620 , a driving module 650 , a lower housing 670 , and a picture generating unit 680 .

[0092] The upper module 610 is disposed at an upper portion of the head-up display 600. The upper module 610 includes an upper housing 611 and a cover lens 612. The cover lens 612 may be mounted on the top of the upper housing 611. An adhesive may be applied between the cover lens 612 and the upper housing 611 to generate a bonding force.

[0093] The enclosure 630 may be coupled to the upper portion of the aspherical mirror 620. The enclosure 630 may be coupled to the lower housing 670 by a threaded connection. When the enclosure 630 and the lower housing 670 are coupled to each other, the enclosure 630 may restrict the aspherical mirror 620 from moving, for example, in the Z-axis direction.

[0094] The folding mirror 631 may be installed on the top of the surrounding screen portion 630. The folding mirror 631 may guide the display image generated by the picture generating unit 680 toward the aspherical mirror 620.

[0095] The head-up display 600 according to another embodiment of the present disclosure may be, for example, a dual-mirror type. In this case, the dual-mirror type refers to a head-up display type in which a display image generated by the picture generation unit 680 is reflected by two mirrors before being projected onto the windshield. The head-up display 600 according to another embodiment of the present disclosure may project a display image toward the windshield using a folding mirror 631 and an aspherical mirror 620.

[0096] However, the head-up display 600 according to another embodiment of the present disclosure may be configured such that the picture generation unit 680 projects the display image directly onto the aspherical mirror 620 and displays the display image reflected by the aspherical mirror 620 on the windshield.

[0097] The aspherical mirror 620 may include a first spherical mounting portion 621 and a second spherical mounting portion 622 .

[0098] The aspherical mirror 620 may reflect the display information projected by the picture generation unit 680 and transmit it to the windshield of the vehicle.

[0099] The aspherical mirror 620 is rotatably installed inside the lower housing 670. In this case, a first spherical mounting portion 621 and a second spherical mounting portion 622 are installed inside the lower housing 670 so that the position of the aspherical mirror 620 can be determined.

[0100] The aspherical mirror 620 may include rigidity reinforcement parts 633 and 634. The rigidity reinforcement parts 633 and 634 may be formed at the rear of the aspherical mirror 620.

[0101] The rigidity reinforcing portion 633 , 634 includes a first fitting portion 634 and a first engaging portion 633 which will be described later.

[0102] The rigidity reinforcing parts 633 , 634 may be formed by combining a first elastic body 641 and a second elastic body 642 .

[0103] When the aspherical mirror 620 is mounted inside the lower housing 670 , the first elastic body 641 and the second elastic body 642 are arranged between the aspherical mirror 620 and the lower housing 670 .

[0104] The first elastic body 641 and the second elastic body 642 are arranged in a central area at the rear of the aspherical mirror 620 to enhance the rigidity of the central area of ​​the aspherical mirror 620 when the aspherical mirror 620 rotates.

[0105] Although not in Figure 6 and Figure 7 Although not shown in FIG. 6 , the head-up display 600 may further include a PCB (not shown). The PCB may be coupled to the interior of the lower housing 670 .

[0106] The PCB may be connected to a driving module 650 for rotating the aspherical mirror 620 .

[0107] The driving module 650 is connected between the lower housing 670 and the aspherical mirror 620. The driving module 650 is configured to rotate the aspherical mirror 620.

[0108] In order to rotate the aspherical mirror 620 , the driving module 650 includes a stepping motor 651 , a lead screw 652 , and a coupling portion 653 .

[0109] Lead screw 652 is connected to stepper motor 651 and converts the rotational motion of stepper motor 651 into linear motion. However, aspherical mirror 620 does not have to rotate in response to a drive command of head-up display 600, and the driver can manually adjust aspherical mirror 620 while observing the height of head-up display information.

[0110] The coupling part 653 is connected between the aspherical mirror 620 and the lead screw 652 to allow the aspherical mirror 620 to rotate according to the drive of the stepping motor 651. For example, the coupling part 653 moves up and down as the lead screw 652 rotates. In this case, a groove may be formed inside the coupling part 653 so that the connecting part 660 can move in the left and right directions. The connecting part 660 has a positioning pin 661 that protrudes a predetermined length in the Y-axis direction and can move in the groove formed in the coupling part 653.

[0111] Therefore, for example, if the driver's eye level changes due to the driver's change or seat height adjustment, the head-up display 600 calculates the position of the head-up display information that matches the driver's eye level, and rotates the aspherical mirror 620 to display the head-up display information at the calculated position. The driver's eye level information may be manually input by the driver, or may be automatically detected by an eye level detection device (not shown) separately provided in the vehicle.

[0112] The lower housing 670 may be provided at the bottom of the head-up display 600. The lower housing 670 has an accommodation space for accommodating the surrounding screen portion 630 and the aspherical mirror 620.

[0113] The lower housing 670 includes a mounting groove 710 in which the aspherical mirror 620 is mounted. The mounting groove 710 may be formed at both ends of the lower housing 670 to correspond to the first spherical mounting portion 621 and the second spherical mounting portion 622 of the aspherical mirror 620, respectively.

[0114] The shape of the mounting groove 710 may be formed, for example, in a "V" shape to prevent a gap after each of the first spherical mounting portion 621 and the second spherical mounting portion 622 is mounted. However, the shape of the mounting groove 710 is not limited thereto. For example, the shape of the mounting groove 710 is preferably formed so that each of the first spherical mounting portion 621 and the second spherical mounting portion 622 can be mounted without considering the tolerance of the lower housing 670.

[0115] The mounting groove 710 according to another embodiment of the present disclosure includes a stopping portion 711 .

[0116] The stopper portion 711 may be formed on one side of the mounting groove 710. Specifically, the stopper portion 711 may be formed to protrude in the X-axis direction in the mounting groove 710. However, the stopper portion 711 may be coupled or attached to the mounting groove 710 as a separate portion.

[0117] The picture generation unit 680 is formed on one side of the lower housing 670. Figure 6 and Figure 7 , the picture generating unit 680 is shown to be disposed at the lower side of the lower housing 670, but the present disclosure is not limited thereto. When the head-up display 600 is a single-lens type, the picture generating unit 680 may be disposed at a side surface of the lower housing 670.

[0118] Figure 8 is along Figure 7 A cross-sectional view taken along line AA in FIG.

[0119] Fig. 9 is a schematic diagram illustrating an operating state of a first elastic body and a second elastic body when an aspherical mirror according to another embodiment of the present disclosure is rotated.

[0120] refer to Figures 7 to 9 , driven by the stepper motor 651 of the driving module 650, the coupling portion 653 moves up and down along the lead screw 652. When the coupling portion 653 moves up and down, the positioning pin 661 of the connecting portion 660 can move left and right in the groove of the coupling portion 653. That is, when the coupling portion 653 moves up and down along the lead screw 652 and the positioning pin 661 moves left and right, the aspherical mirror 620 can rotate. In a conventional head-up display device, an elastomer that prevents a gap between the units corresponding to the connecting portion 660 and the coupling portion 653 is arranged separately between these units. However, even in the case where a separate elastomer is not arranged between the connecting portion 660 and the coupling portion 653, the head-up display 600 according to another embodiment of the present disclosure can eliminate the gap between the connecting portion 660 and the coupling portion 653 using the first elastomer 641 and the second elastomer 642.

[0121] The lower housing 670 includes a second engaging portion 671 and a second fitting portion 672 .

[0122] The second engaging portion 671 and the second fitting portion 672 are integrally formed in one region of the lower housing 670. The second engaging portion 671 and the second fitting portion 672 are preferably formed in a region corresponding to the position inside the lower housing 670 where the aspherical mirror 620 is mounted.

[0123] The second engaging portion 671 may be formed in a hook shape so that the other end of the first elastic body 641 may be hooked. Alternatively, the second engaging portion 671 may have a predetermined hole formed to be engageable with a portion of the other end of the first elastic body 641 .

[0124] The second mating portion 672 has a groove formed so that the other end of the second elastic body 642 can be matched therewith, and a boss (not shown) is formed at the center of the formed groove. In this case, the boss is preferably formed to have a size corresponding to the diameter of the second elastic body 642.

[0125] The first elastic body 641 may be, for example, a tension spring. The first elastic body 641 refers to a spring having a compressive force against the external force when stretched by the external force. When the aspherical mirror 620 rotates a predetermined angle from its initial position, the length of the first elastic body 641 increases. That is, the first elastic body 641 has a compressive force proportional to the rotation angle of the aspherical mirror 620.

[0126] The second elastic body 642 may be, for example, a compression spring. The second elastic body 642 refers to a spring having a tensile force that resists the external force when compressed by an external force. When the aspherical mirror 620 rotates a predetermined angle from the initial position, the length of the second elastic body 642 decreases. That is, the second elastic body 642 has a tensile force proportional to the rotation angle of the aspherical mirror 620.

[0127] When the aspherical mirror 620 maintains a rotation state, the first elastic body 641 and the second elastic body 642 can enhance the rigidity of the central area of ​​the aspherical mirror 620 based on given tensile force and compressive force, respectively.

[0128] The second elastic body 642 according to another embodiment of the present disclosure may maintain a bent state of a predetermined angle when coupled to the first mating portion 634 and the second mating portion 672 .

[0129] The stopper portion 711 can limit the movement of the aspherical mirror 620. For example, when the repulsive force of the first elastic body 641 is greater than the repulsive force of the second elastic body 642, the aspherical mirror 620 can move in the same direction as the first elastic body 641. Figure 2 Therefore, when external force is applied to the first spherical mounting portion 621 and the second spherical mounting portion 622 in the mounting groove 710 in the direction opposite to the X-axis direction, vibration and noise may be generated. In this case, the stopper portion 711 can prevent vibration and noise by eliminating the gap between the aspherical mirror 620 and the mounting groove 710.

[0130] Each element of the device or method according to the present invention can be implemented by hardware or software, or by a combination of hardware and software. The functions of each element can be implemented in software, and the microprocessor can be implemented to execute the software functions corresponding to each element.

[0131] Various embodiments of the systems and techniques described herein can be implemented using digital electronic circuits, integrated circuits, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), computer hardware, firmware, software, and / or combinations thereof. Various embodiments may include implementations using one or more computer programs that can be executed on a programmable system. The programmable system includes at least one programmable processor, at least one input device, and at least one output device, the at least one programmable processor being a dedicated processor or a general-purpose processor, and being connected to receive data and instructions from a storage system and to transmit data and instructions to a storage system. A computer program (also referred to as a program, software, software application, or code) includes instructions for a programmable processor and is stored in a "computer-readable recording medium."

[0132] The computer-readable recording medium may include all types of storage devices that can store computer-readable data. The computer-readable recording medium may be a non-volatile medium or a non-temporary medium, such as a read-only memory (ROM), a random access memory (RAM), a compact disc ROM (CD-ROM), a magnetic tape, a floppy disk, or an optical data storage device. In addition, the computer-readable recording medium may also include a transient medium such as a data transmission medium. In addition, the computer-readable recording medium may be distributed on computer systems connected via a network, and the computer-readable program code may be stored and executed in a distributed manner.

[0133] Although the operations are shown as being performed in sequence in the flowcharts / sequence diagrams in this specification, this is merely an exemplary description of the technical concept of an embodiment of the present disclosure. In other words, it should be understood by those skilled in the art that various modifications and changes can be made without departing from the essential features of the embodiments of the present disclosure, that is, the order shown in the flowcharts / sequence diagrams can be changed and one or more operations of the multiple operations can be performed in parallel. Therefore, the flowcharts / sequence diagrams do not limit the time sequence.

[0134] Although the exemplary embodiments of the present disclosure are described for illustrative purposes, it will be appreciated by those skilled in the art that various modifications, additions and substitutions are possible without departing from the idea and scope of the claimed invention. Therefore, for the sake of brevity and clarity, the exemplary embodiments of the present disclosure have been described. The scope of the technical concept of the present embodiment is not limited by the diagram. Therefore, it will be understood by those of ordinary skill in the art that the scope of the claimed invention is not limited by the embodiments explicitly described above, but by the claims and their equivalents.

Claims

1. A head-up display, comprising: Lower housing; An aspherical mirror, comprising a first spherical mounting portion and a second spherical mounting portion located at a first end portion and a second end portion of the aspherical mirror, wherein the first spherical mounting portion and the second spherical mounting portion are mounted in mounting grooves formed at the first end portion and the second end portion of the lower housing, respectively; an upper module disposed at an upper portion of the aspherical mirror and coupled to the lower housing, Wherein, the aspherical mirror includes a rigidity reinforcement portion located between the first spherical mounting portion and the second spherical mounting portion.

2. The head-up display according to claim 1, wherein: The rigidity enhancing portion is formed to protrude from a central region of the aspherical mirror.

3. The head-up display according to claim 1, wherein: The rigidity reinforcing portion includes a receiving groove in which an elastic body having a predetermined elastic force and a guide protrusion arranged at an end of the elastic body are received.

4. The head-up display according to claim 1, wherein: The rigidity reinforcement portion includes a plurality of ribs on an outer surface of the rigidity reinforcement portion.

5. The head-up display according to claim 3, wherein: The lower housing includes a receiving portion on an inner surface of the lower housing for receiving the guide protrusion, and when the aspherical mirror rotates, the guide protrusion moves in contact with the inner surface of the receiving portion.

6. The head-up display according to claim 5, wherein: The receiving portion includes a V-shaped groove on an inner surface of the receiving portion, and includes a guide groove formed by bending the inner surface of the receiving portion one or more times.

7. The head-up display according to claim 6, wherein: The guide groove comprises: a first rotation section, in which the aspherical mirror rotates within a first angle range; and The second rotation section, the aspherical mirror rotates within a second angle range in the second rotation section.

8. The head-up display according to claim 7, wherein: The elastic body generates a larger elastic force in the second rotation section than in the first rotation section.

9. The head-up display according to claim 1, wherein: At least one of the mounting grooves includes a stopper portion that restricts movement of the aspherical mirror due to an elastic force applied by the rigidity reinforcing portion.

10. The head-up display according to claim 9, wherein: The stopper portion is formed or arranged on an inner surface of at least one of the mounting grooves at a position corresponding to a direction of an elastic force applied by the rigidity reinforcing portion.

11. A head-up display device, comprising: Lower housing; An aspherical mirror, the aspherical mirror comprising: A first spherical mounting portion and a second spherical mounting portion, respectively located at a first end portion and a second end portion of the aspherical mirror and mounted inside the lower housing; and a rigidity enhancing portion formed at a rear side of the aspherical mirror; a driving module coupled to the aspheric mirror and configured to rotate the aspheric mirror; A connecting part connected between the driving module and the aspherical mirror; and a first elastic body and a second elastic body, Wherein, the first elastic body and the second elastic body are connected to the rigidity reinforcing portion to enhance the rigidity of the central area of ​​the aspherical mirror.

12. The head-up display device according to claim 11, wherein: The rigidity enhancing portion is formed integrally with the aspherical mirror.

13. The head-up display device according to claim 11, wherein: The rigidity reinforcement portion comprises: a first engaging portion to which a first end portion of the first elastic body is engaged; and A first fitting portion to which the first end of the second elastic body is fitted.

14. The head-up display device according to claim 13, wherein: The lower housing comprises: a second engaging portion to which a second end portion of the first elastic body is engaged at a region corresponding to the first engaging portion based on the first elastic body; and A second fitting portion to which a second end portion of the second elastic body is fitted at a region corresponding to the first fitting portion based on the second elastic body.

15. The head-up display device according to claim 14, wherein: The second engaging portion and the second fitting portion are integrally formed with the lower housing.

16. The head-up display device according to claim 14, wherein: The second elastic body is configured to maintain a bent state when a first end of the second elastic body is coupled to the first mating portion and a second end of the second elastic body is coupled to the second mating portion.

17. The head-up display device according to claim 13, wherein: When the aspherical mirror is rotated by a predetermined angle from an initial position of the first elastic body, displacement of the first elastic body increases, and a compressive force of the first elastic body is proportional to the rotation angle of the aspherical mirror.

18. The head-up display device according to claim 13, wherein: When the aspherical mirror is rotated by a predetermined angle from an initial position of the second elastic body, the displacement of the second elastic body is reduced, and the tensile force of the second elastic body is proportional to the rotation angle of the aspherical mirror.

19. The head-up display device according to claim 11, wherein: The driving module comprises: a motor configured to generate a driving force to rotate the aspherical mirror; a lead screw extending and coupled to the rotating shaft of the motor; and a coupling portion coupled to the lead screw to move up and down along the lead screw and including a groove, Wherein, the connecting portion includes a positioning pin, which is slidably engaged in the groove of the coupling portion and can move in a predetermined direction in the groove.

20. The head-up display device according to claim 19, wherein: When the positioning pin moves in a predetermined direction in the groove, the first elastic body and the second elastic body provide elastic force to eliminate a gap formed between the positioning pin and the groove.

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