HEAD-UP DISPLAY DEVICE

Abstract

Task: To provide a head-up display device that improves heat resistance to focused light and achieves weight reduction. Solution: A head-up display device 10 comprises a display device 14 for emitting display light L, a corrective mirror 11 that reflects the display light L such that an upper end and a lower end of the display light L intersect, a concave mirror 12 that reflects the display light L such that the display light L is projected outside the head-up display device 10, a housing 30 that accommodates the display device 14, the corrective mirror 11 and the concave mirror 12, has an opening section 36a through which the display light L passes, and is made of resin, and a blanking plate 40 that is attached to an inner bottom surface 35b of the housing 30 and is made of metal to form an optical path space S through which the display light L propagates within the housing 30.

Description

Technical field

[0001] The present disclosure relates to a head-up display device. State of the art

[0002] The head-up display device described in patent document 1 comprises a first mirror, a second mirror, and a housing that accommodates the first and second mirrors, with a crossed optical path formed between the first and second mirrors. In a head-up display device with such a crossed optical path, the temperature can easily rise due to the concentration of sunlight within the housing. Therefore, for heat resistance, a middle frame and an upper cover of the housing are made of metal (see paragraphs 0034 and 0037 in patent document 1). Literature on the state of the art; patent documents

[0003] Patent document 1: Japanese patent no. 6769481 Summary of the invention Problem to be solved by the invention

[0004] In the embodiment described in the aforementioned patent document 1, the housing is made of metal, which improves the heat resistance of the head-up display device but increases its weight. If, on the other hand, the housing is made of resin, the weight of the head-up display device can be reduced, but the heat resistance when focusing light is lower.

[0005] The present disclosure was designed taking into account the above circumstances and aims to provide a head-up display device which improves heat resistance to focused light and achieves a weight reduction. Means of solving the task

[0006] To achieve the above-mentioned objective, the head-up display device according to the present disclosure comprises a display device for emitting display light, a corrective mirror that reflects the display light such that an upper end and a lower end of the display light intersect, a concave mirror that reflects the display light such that the display light is projected outside the head-up display device, a housing that accommodates the display device, the corrective mirror and the concave mirror, has an opening section through which the display light passes and is formed from synthetic resin, and a blanking plate that is attached to an inner bottom surface of the housing and is made of metal to form an optical path space through which the display light propagates within the housing. Advantages of the invention

[0007] According to the present disclosure, it is possible to improve the heat resistance to focused light while simultaneously achieving a weight reduction. Brief description of the drawings Fig. Figure 1 is a schematic cross-sectional view of a head-up display device according to an embodiment of the present disclosure. Fig. Figure 2 is a perspective view of the head-up display device according to an embodiment of the present disclosure in which an upper housing section has been removed. Fig. Figure 3 is a perspective view of the head-up display device according to an embodiment of the present disclosure, in which the upper housing section has been removed. Fig. Figure 4 is a perspective view of an eyepiece cover and a correction mirror according to an embodiment of the present disclosure. Fig. Figure 5 is a perspective view of the blind cover according to an embodiment of the present disclosure. Fig. Figure 6 is a perspective view of the blind cover according to an embodiment of the present disclosure. Fig. Figure 7 is a perspective view of the blind cover according to an embodiment of the present disclosure. Fig. Figure 8 is a cross-sectional view along line VIII-VIII in Fig. 3. Fig. Figure 9 is a perspective view of the blind cover according to an embodiment of the present disclosure. Fig. Figure 10 is a top view in which the blind cover according to an embodiment of the present disclosure is shown transparently and arranged in a lower housing section. Embodiments of the invention

[0008] A head-up display device according to an embodiment of the present disclosure is described with reference to the drawings. As in Fig. As shown in Figure 1, a head-up display device 10 is mounted in a vehicle and projects display light L onto a windshield 19, which is an example of a projection target element for displaying a projected image as a virtual image with vehicle information. In the following description, the vehicle's vertical direction is defined as the Y-direction, its horizontal direction as the X-direction, and its front-to-rear direction as the Z-direction.

[0009] The head-up display device 10 comprises a corrective mirror 11, which is an example of a fixed mirror, a concave mirror 12, which is an example of a rotating mirror, a housing 30, a lighting unit 13, a display unit 14, a control board 15 and a mirror rotation drive unit 18.

[0010] The illumination unit 13 is controlled by the control board 15 to emit illumination light towards the display unit 14. The illumination unit 13 comprises, for example, a number of light-emitting diodes (LEDs). The display unit 14 receives the illumination light from the illumination unit 13 and emits display light L, which represents an image. The display unit 14 is, for example, a thin-film transistor (TFT) liquid crystal display panel.

[0011] The control board 15 controls the lighting unit 13, the display unit 14, and the mirror rotation drive unit 18. The control board 15 comprises a central processing unit (CPU), a graphics display controller (GDC), a read-only memory (ROM), and a random access memory (RAM). The control board 15 receives vehicle information from an external source and causes an image containing the vehicle information to be displayed on the display unit 14, while illumination light from the lighting unit 13 is directed toward the display unit 14.

[0012] As in Fig. As shown in Figure 1, the corrective mirror 11 reflects the indicator light L from the display device 14 towards the concave mirror 12. The corrective mirror 11 has a reflective surface 11a, which is a freeform surface that corrects the distortion of the virtual image caused by the shape of the windshield 19. The reflective surface 11a of the corrective mirror 11 points obliquely downwards in the direction of the front of the vehicle. The reflective surface 11a causes an upper end and a lower end of the reflected indicator light L to intersect at a point CP. The point CP is located between the corrective mirror 11 and the concave mirror 12, more precisely, closer to the corrective mirror 11 than the midpoint between the corrective mirror 11 and the concave mirror 12.The curvature of the reflecting surface 11a of the corrective mirror 11 and of a reflecting surface 12a of the concave mirror 12 is greater in a crossed optical system, in which rays of the indicator light L are crossed, than in a configuration in which the indicator light L is not crossed. With increasing curvature of the reflecting surfaces 11a and 12a, the sunlight is more strongly focused.

[0013] As in Fig. As shown in Figure 4, the corrective mirror 11 has three pressed sections 11L, 11R, and 11C. The two pressed sections 11L and 11R are formed in a convex shape on both side faces of the corrective mirror 11 in the X direction. Each of the pressed sections 11L and 11R has a substantially cylindrical shape extending in the X direction. The pressed section 11C is formed in a convex shape on the lower side face of the corrective mirror 11.

[0014] As in Fig. As shown in Figure 1, the concave mirror 12 has a reflective surface 12a that reflects the indicator light L from the correction mirror 11 towards the windshield 19. The reflective surface 12a points obliquely upwards towards the rear of the vehicle. The concave mirror 12 is, for example, a parabolic mirror. A lower end face of the concave mirror 12 extends along the X-direction, is located at its lowest point in a central section in the X-direction, and curves upwards outwards in the X-direction with increasing distance from the central section. Both end faces of the concave mirror 12 on a pivot axis Ax are pivotably mounted about the pivot axis Ax in the housing 30. As shown in Figure 1, the concave mirror 12 is mounted in the housing 30. Fig. As shown in Figure 2, the concave mirror 12 is elongated in the X-direction, and its length in the X-direction is greater than the length of the corrector mirror 11 in the X-direction. While the concave mirror 12 and the corrector mirror 11 are opposite each other in the Z-direction, the center position of the corrector mirror 11 in the X-direction is closer to a side wall section 45R, described later, than the center position of the concave mirror 12 in the X-direction.

[0015] As in Fig. As shown in Figure 1, the mirror rotation drive unit 18 pivots the concave mirror 12 about the axis of rotation Ax under the control of the control board 15. When the concave mirror 12 is pivoted about the axis of rotation Ax, a beam position of the indicator light L relative to a viewer in the Z direction can be set.

[0016] The housing 30 comprises a lower housing section 35, an upper housing section 36 and a lower cover section 37. All sections of the housing 30 are made of a light-shielding resin.

[0017] The lower housing section 35 has the shape of an upward-facing box and contains a blanking plate 40, the corrective mirror 11, the concave mirror 12, and the mirror rotation drive unit 18. The illumination unit 13, the display unit 14, and the control board 15 are located on the outer bottom surface of the lower housing section 35. The lower cover section 37 is attached to the outer bottom surface of the lower housing section 35 to cover the illumination unit 13 and the display unit 14.

[0018] The upper housing section 36 is attached to the upper part of the lower housing section 35 to close an opening that faces the top of the lower housing section 35. The upper housing section 36 is in the form of a frame with an opening 36a through which the indicator light L passes, radiating from the concave mirror 12 towards the windshield 19. The opening 36a of the upper housing section 36 is closed by a translucent plate section 36b through which light, including the indicator light L, passes.

[0019] The blanking plate 40 is located inside the housing 30 and forms an optical path space S within the housing 30, through which the indicator light L propagates. The blanking plate 40 conceals structures and shapes (for example, a ribbed structure formed in the housing 30 and the mirror rotation drive unit 18) that could cause stray light from the optical path space S. The blanking plate 40 is manufactured in one piece from metal. The metal can be an ordinary metal or a light metal, with light metals such as aluminum alloys or magnesium alloys being preferred. The blanking plate 40 is shaped to cover an area in which parallel light, for example, sunlight, which can enter through the opening section 36a of the housing 30, is focused by the concave mirror 12.The blind cover 40 is formed by a process such as casting, die casting, stamping or bending, but can also be formed by other processes.

[0020] As in Fig. 2 and Fig. As shown in Figure 3, the blind cover 40 comprises a base plate section 41, extension sections 43L and 43R, a pair of side wall sections 45L and 45R, a light-shielding wall 48, an opening pipe section 42, and, as shown in Figure 3, Fig. Figure 6 shows a mirror mounting frame section 47, receiving sections 44L, 44R and 44C and a light entry tube section 49.

[0021] As in Fig. 3 and Fig. As shown in Figure 5, the base plate section 41 has the shape of a plate that faces an inner base surface 35b of the lower housing section 35 and is formed between the concave mirror 12 and the correction mirror 11. The length of the base plate section 41 in the X-direction decreases from the concave mirror 12 towards the correction mirror 11.

[0022] As in Fig. 9 and Fig. As shown in Figure 10, positioning pins 41a to 41c are provided upright on the rear side (the surface opposite the optical path space S) of the base plate section 41. The positioning pins 41a to 41c have a cylindrical shape and fit into hole sections 35a, 35c and 35d (see Figure 10). Fig. 10), which are formed in the inner base surface 35b of the lower housing section 35. This positions the blanking plate 40 on the lower housing section 35. The positioning pin 41b is located essentially in the center of the rear of the base plate section 41. The positioning pins 41a and 41b are arranged side by side in the Z-direction at positions opposite the correction mirror 11 in the Z-direction. The positioning pin 41c is located in a position that is not opposite the correction mirror 11 in the Z-direction; more precisely, the positioning pin 41c is located closer to the side wall section 45R than to the correction mirror 11. The distance between the respective positioning pins 41a and 41b and the correction mirror 11 is shorter than the distance between the positioning pin 41c and the correction mirror 11. The side wall sections 45L and 45R do not have positioning pins.

[0023] As in Fig. 3, Fig. 5 and Fig. As shown in Figure 8, the extension sections 43L and 43R are positioned on both sides in the X-direction at end sections of the base plate section 41 on the side of the correction mirror 11. The extension sections 43L and 43R are coupled to the underside of the end section of the base plate section 41 on the side of the correction mirror 11. The extension sections 43L and 43R extend such that they slope down to positions that are spaced outwards on both sides in the X-direction from the central section of the lower end face of the concave mirror 12.

[0024] The length of extension section 43R in the Z-direction decreases with increasing distance from extension section 43L in the X-direction. Extension section 43L has a shape such that its length in the Z-direction is equal to its length in the X-direction. The minimum length of extension section 43R in the Z-direction is longer than the length of extension section 43L in the Z-direction. A gap G is formed between extension sections 43L and 43R in the X-direction. The middle section of the lower end face of the concave mirror 12 is located in the gap G. The lower end face of the concave mirror 12 is at its lowest point in the middle section in the X-direction and curves upwards with increasing distance outwards in the X-direction from the middle section. The formation of the gap G prevents the extension sections 43L and 43R from touching the lower end face of the concave mirror 12.

[0025] As in Fig. As shown in Figure 3, the pair of side wall sections 45L and 45R extends such that they project from the two outer end sections of the base plate section 41 in the X direction. The pair of side wall sections 45L and 45R is formed between the light-shielding wall 48 and the reflecting surface 12a in the Z direction. The pair of side wall sections 45L and 45R is shaped such that the distance between the surfaces of the pair of side wall sections 45L and 45R increases from the correction mirror 11 towards the concave mirror 12.

[0026] As in Fig. 1 and Fig. As shown in Figure 3, the light-shielding wall 48 is inclined such that it hangs down in the Z-direction from a rear edge section of the opening section 36a of the housing 30. The light-shielding wall 48 blocks sunlight propagating from outside the head-up display device 10 toward the correction mirror 11 and the display unit 14. The light-shielding wall 48 extends in the X-direction and has a plate shape inclined so that it approaches the bottom plate section 41 from the correction mirror 11 toward the concave mirror 12. The end sections of the side wall sections 45L and 45R near the correction mirror 11 are coupled to the two ends of the upper surface of the light-shielding wall 48 in the X-direction. A recessed section 48a is formed in the light-shielding wall 48, opening toward the bottom plate section 41.A circumferential end section of the recessed section 48a is coupled to an end section of the opening tube section 42, which is closer to the concave mirror 12.

[0027] As in Fig. As shown in Figure 6, the opening tube section 42 is located on the rear side (on the side opposite the optical path space S) of the light shielding wall 48 and has a tubular shape that surrounds an outer circumference of the indicator light L reflected by the correction mirror 11.

[0028] The mirror mounting frame section 47 is located at an end section of the opening tube section 42 on the side opposite the light-shielding wall 48. The mirror mounting frame section 47 has the form of a frame that covers the outer circumferential side of the reflective surface of the corrector mirror 11 and supports the corrector mirror 11 in contact with the outer circumferential side of the reflective surface of the corrector mirror 11.

[0029] As in Fig. As shown in Figure 4, the receiving sections 44L, 44R, and 44C are located on the outer circumferential side of the mirror mounting frame section 47 and are formed in a recessed shape to support the pressed sections 11L, 11R, and 11C of the corrector mirror 11. The pressed sections 11L, 11R, and 11C in the receiving sections 44L, 44R, and 44C are pressed by leaf springs 39L, 39R, and 39C, thereby holding the pressed sections 11L, 11R, and 11C in the receiving sections 44L, 44R, and 44C. Screw holes SH (see Figure 4) Fig. 6) The screws Sc for fastening the leaf springs 39L, 39R, and 39C are opened towards the rear.

[0030] The opening direction of the screw holes SH and the opening direction of the mounting sections 44L, 44R, and 44C are in the same direction and opposite to the propagation direction of the indicator light L reflected by the correction mirror 11 (rear direction of the vehicle). Therefore, the same direction can be used for the direction in which the correction mirror 11 is attached to the mirror mounting frame section 47 and the direction in which the leaf springs 39L, 39R, and 39C are screwed in. This facilitates the installation of the head-up display device 10.

[0031] As in Fig. As shown in Figure 7, the light inlet tube section 49 surrounds the outer circumference of the indicator light L from the display device 14 to the correction mirror 11 and has a tubular shape extending in the Y direction. The light inlet tube section 49 is positioned such that it is opposite the mirror mounting frame section 47 in the Y direction.

[0032] As in Fig. As shown in Figure 5, an upper end section of the light inlet tube section 49 is connected to the bottom surface of the opening tube section 42 as opening section 49h, through which the indicator light L is emitted. The opening section 49h is located closer to the side wall section 45R than to the center of the blanking plate 40 in the X direction. The light inlet tube section 49 has a rectangular tube shape that is elongated in the X direction.

[0033] As in Fig. 7 and Fig. As shown in Figure 9, the light inlet tube section 49 comprises four wall sections 49a to 49d, which surround the outer circumference of the indicator light L of the indicator device 14. Wall sections 49a and 49c extend in the Z direction and are arranged side by side in the X direction. Wall sections 49b and 49d also extend in the X direction and are arranged side by side in the Z direction. Wall section 49a is closer to the side wall section 45R than wall section 49c. Wall section 49a extends perpendicularly to the base plate section 41. Wall section 49c is inclined with respect to the base plate section 41, and in particular, inclined such that it approaches wall section 49a towards its underside. Wall section 49b is shaped such that its height relative to the base plate section 41 decreases from wall section 49c to wall section 49a.

[0034] Wall section 49d is further away from the concave mirror 12 than wall section 49b and has the shape of a plate with a smaller surface area than the other wall sections 49a to 49c. The receiving section 44C is formed on the surface of wall section 49d opposite the opening section 49h. Wall section 49d has the shape of a plate that is shorter in the X-direction than wall section 49b and has a lower maximum height in the Y-direction than wall section 49b. One end (the left end) of wall section 49d in the X-direction is... Fig. 9) coupled with wall section 49a, and the other end (the right end in Fig. 9) separated from wall section 49c by a gap H. The gap H is opposite a higher section of wall section 49b in the Z-direction.

[0035] As in Fig. 4 and Fig.As shown in Figure 6, the lower housing section 35 has a closure section 34 that seals the gap H and the underside of the wall section 49d. The closure section 34 is made of resin and is part of the lower housing section 35. The closure section 34 has the form of a plate with a recess in a shape corresponding to the wall section 49d. The gap H and the underside of the wall section 49d are sealed by the closure section 34, so that the light entrance tube section 49 has a closed tubular shape. The closure section 34 and the wall section 49d form a single plate made of different materials.

[0036] The locking section 34 can be formed integrally with the lower housing section 35 or separately from the lower housing section 35. (Effect)

[0037] According to the embodiment described above, the following effects are achieved.

[0038] (1) The head-up display device 10 comprises the display device 14 for emitting display light L, the corrective mirror 11 which reflects the display light L so that an upper end and a lower end of the display light L intersect, the concave mirror 12 which reflects the display light L so that the display light L is projected outside the head-up display device 10, the housing 30 which accommodates the display device 14, the corrective mirror 11 and the concave mirror 12, has the opening section 36a through which the display light L passes and is made of synthetic resin, and the blanking plate 40 which is attached to the inner bottom surface 35b of the housing 30 and is made of metal to form the optical path space S through which the display light L propagates within the housing 30.

[0039] In the crossed optical system, in which the upper and lower ends of the indicator light L are crossed by the correcting mirror 11, it is easy for the concave mirror 12 to focus sunlight (parallel light).

[0040] According to the above described design, the blind cover 40 is made of metal, which improves the heat resistance to the heating caused by the focusing of light in the crossed optical system, while the housing 30 is made of resin, which reduces the weight of the head-up display device 10.

[0041] (2) The blanking plate 40 has the light-shielding wall 48, which is shaped to hang down from part of an edge section of the opening section 36a. According to such a design, the light-shielding wall 48, which easily focuses sunlight, is made of metal so that the heat resistance of the head-up display device 10 can be improved.

[0042] (3) The head-up display device 10 comprises the mirror rotation drive unit 18, which rotates the concave mirror 12 about the axis of rotation Ax, which, from the perspective of a viewer viewing a virtual image V, which is an example of a projected image displayed by the head-up display device 10, runs in a left-right direction. The blanking plate 40 is located between the correction mirror 11 and the concave mirror 12 and comprises the base plate section 41, which is arranged opposite the inner base surface 35b of the housing 30, as well as the extension sections 43L and 43R, which are formed at end sections of the base plate section 41 on the side of the concave mirror 12 and project downwards from the left and right ends of the concave mirror 12.According to such a design, the extension sections 43L and 43R prevent unnecessary structures such as the wiring inside the housing 30 from being visible, even when the concave mirror 12 is rotated, thereby improving the appearance inside the housing 30.

[0043] The formation of the gap G between the two extension sections 43L and 43R also prevents the rotating concave mirror 12 from coming into contact with the blanking plate 40. Furthermore, it is not necessary to position the concave mirror 12 far from the blanking plate 40 to avoid contact, thus preventing an increase in the size of the head-up display device 10.

[0044] (4) The blanking plate 40 comprises the plurality of wall sections 49a to 49d that surround an outer circumference of the indicator light L, which travels from the display device 14 to the corrective mirror 11. Of the plurality of wall sections 49a to 49d, at least a portion of wall section 49d, which faces an inner side surface of the housing 30, is omitted to form the gap H. The housing 30 has the closing section 34, which closes the gap H. According to such an embodiment, the closing section 34 of the resin housing 30 closes the gap H between the plurality of metal wall sections 49a to 49d, thereby reducing the weight compared to a housing having a tubular shape formed entirely from metal. Furthermore, since no double wall is used, the head-up display device 10 can be made smaller.

[0045] (5) The blanking plate 40 holds the correction mirror 11 and has the mirror mounting frame section 47, which is frame-shaped. The correction mirror 11 can be attached to the mirror mounting frame section 47 from a direction along the propagation direction of the display light L reflected by the correction mirror 11. According to such a design, the head-up display device 10 can be manufactured more easily than in a design where the correction mirror 11 is mounted to the mirror mounting frame section 47 from above. In addition, the same direction can be used for mounting the correction mirror 11 to the mirror mounting frame section 47 and for attaching the screws Sc to the mirror mounting frame section 47. This makes it easy to mount and secure the correction mirror 11 to the mirror mounting frame section 47.

[0046] (6) The blind cover 40 is located between the correction mirror 11 and the concave mirror 12 and has the base plate section 41, which is positioned opposite the inner base surface 35b of the housing 30, and the positioning pins 41a to 41c, which are an example of a plurality of positioning sections formed on a rear side of the base plate section 41 opposite the inner base surface 35b of the housing 30, and which are positioned in the hole sections 35a, 35c, and 35d, which are an example of positioning sections formed on the inner base surface 35b of the housing 30. Of the multiple positioning pins 41a to 41c, the positioning pins 41a and 41b are positioned opposite the correction mirror 11 in the Z direction along the indicator light L between the correction mirror 11 and the concave mirror 12.

[0047] It is necessary that the correction mirror 11 has a high positioning accuracy. According to the design described above, the blanking plate 40 can be positioned at a point near the correction mirror 11 by the positioning pins 41a and 41b.

[0048] Furthermore, since the base plate section 41 is stronger than the side wall sections 45L and 45R, the formation of the positioning pins 41a to 41c on the base plate section 41 allows for more stable positioning than if the positioning pins 41a to 41c were formed on the side wall sections 45L and 45R.

[0049] It should be noted that the present disclosure is not limited to the embodiments and drawings described above. Suitable modifications (including the omission of components) can be made without departing from the fundamental idea of ​​the present disclosure. An example of such modifications is described below. (Modifications)

[0050] In the embodiment described above, the mirror mounting frame section 47 and the receiving sections 44L, 44R and 44C can also be manufactured separately from the blind cover 40 made of resin or metal.

[0051] The light-shielding wall 48 can be manufactured separately from the blanking plate 40, using resin or metal. The light-shielding wall 48 can be formed in the upper housing section 36.

[0052] The extension sections 43L and 43R can be coupled in the X direction. Furthermore, one or both of the extension sections 43L and 43R can be omitted. In the embodiment described above, the mirror rotation drive unit 18 can be omitted. In this case, the concave mirror 12 can be fixed in the housing 30 to prevent rotation.

[0053] In the embodiment described above, the light inlet tube section 49 can be designed without the gap H. In this case, the closure section 34 can be omitted.

[0054] In the embodiment described above, the positions and number of positioning pins 41a to 41c can be modified as needed. The positioning pins 41a to 41c can be located on the side wall sections 45L and 45R.

[0055] In the embodiment described above, the correction mirror 11 can be a plane mirror.

[0056] In the embodiment described above, the positioning pins 41a to 41c can be formed in the lower housing section 35 and the hole sections 35a, 35c and 35d can be formed in the blind cover 40.

[0057] In the embodiment described above, the projection target element is the windshield 19; however, it can also be a specially designed combiner. Furthermore, the head-up display device 10 is not limited to installation in a truck, but can also be installed in other means of transport, such as an aircraft or a ship.

[0058] In the embodiment described above, the display device 14 is, for example, a thin-film transistor (TFT) liquid crystal display panel. However, the display device 14 is not limited to this and can be configured to include an organic electroluminescence (EL) display, a microelectromechanical system (MEMS), or a digital micro-mirror device (DMD).

[0059] In the embodiment described above, it is not necessary for the blanking plate 40 to be made of metal; it can also be made of resin. Furthermore, the corrective mirror 11 can be a reversing mirror that does not cross the indicator light L. These modifications are included in the technical ideas described in the appendix below. (Annex 1)

[0060] A head-up display device that a display device for emitting indicator light, a reversing mirror that reflects the indicator light, a concave mirror that reflects the display light in such a way that the display light is projected outside the head-up display device, a housing that accommodates the display device, the reversing mirror and the concave mirror and has an opening section through which the display light passes, a blanking plate attached to an inner bottom surface of the housing, forming an optical path through which the indicator light propagates within the housing, and a mirror rotation drive unit that rotates the concave mirror about a left-right axis of rotation, with the blind cover a base plate section arranged between the inverting mirror and the concave mirror, positioned opposite the inner base surface of the housing, and has an extension section formed at an end section of the base plate section on the side of the concave mirror, and projects downwards from the concave mirror. (Annex 2)

[0061] A head-up display device that a display device for emitting indicator light, a reversing mirror that reflects the indicator light, a concave mirror that reflects the display light so that the display light is projected outside the head-up display device, a housing that accommodates the display device, the reversing mirror and the concave mirror and has an opening section through which the display light passes, and comprising a blanking plate attached to an inner bottom surface of the housing and forming an optical path space through which the display light propagates within the housing, the blanking plate having a plurality of wall sections surrounding an outer perimeter of the display light moving from the display device to the reversing mirror, at least part of a wall of the multitude of wall sections, which faces an inner side surface of the housing, is omitted to form a gap, and the housing includes a closure section that closes the gap. (Annex 3)

[0062] A head-up display device that a display device for emitting indicator light, a reversing mirror that reflects the indicator light, a concave mirror that reflects the display light so that the display light is projected outside the head-up display device, a housing that accommodates the display device, the reversing mirror and the concave mirror and has an opening section through which the display light passes, and comprising a blanking plate attached to an inner bottom surface of the housing and forming an optical path space through which the display light propagates within the housing, the blanking plate holding the reversing mirror and having a mirror mounting frame section which is frame-shaped, and The reversing mirror is attached to the mirror mounting frame section from a direction along a propagation direction of the indicator light reflected by the reversing mirror. Reference symbol list

[0063] 10... Head-Up Display 11... Correction mirror, 11C, 11L, 11R... Pressed section, 11a... Reflective surface 12... Concave mirror, 12a... Reflective surface 13... Lighting unit 14... Display unit 15... Control board 18... Mirror rotation drive unit 19... Windshield 30... Housing, 34... Closure section, 35... Lower housing section, 35b... Inner bottom surface, 35a, 35c, 35d... Perforated section, 36... Upper housing section, 36a... Opening section, 36b... Translucent plate section, 37... Lower cover section, 39L, 39R, 39C... Leaf spring 40... Blanking plate, 41... Base plate section, 41a to 41c... Positioning pin, 42... Opening tube section, 43L, 43R... Extension section, 44C, 44L, 44R... Receiving section, 45L, 45R... Side wall section, 47... Mirror mounting frame section, 48... Light-blocking wall, 48a... Recessed section, 49... Light entry tube section, 49a to 49d... Wall section, 49h... Opening section CP... Intersection point, G... Gap, H... Gap, L... Indicator light, S... Optical path space, SH... Screw hole, Sc... Screw, Ax... Axis of rotation QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 6769481

[0003]

Claims

[1] Head-up display device, comprising: a display device for emitting indicator light; a corrective mirror that reflects the indicator light in such a way that an upper end and a lower end of the indicator light intersect; a concave mirror that reflects the display light in such a way that the display light is projected outside the head-up display device; a housing that accommodates the display device, the corrective mirror and the concave mirror, has an opening through which the display light passes, and is made of synthetic resin; and A blanking plate, which is attached to an inner bottom surface of the housing and is made of metal to form an optical path space through which the indicator light propagates within the housing. [2] Head-Up Display Device according to Claim 1, wherein the blind cover has a light-shielding wall extending from part of an edge section of the opening section and blocking sunlight. [3] Head-up display device according to claim 1, comprising a mirror rotation drive unit which rotates the concave mirror about a rotation axis extending in the left-right direction, wherein the blanking plate a base plate section located between the corrective mirror and the concave mirror, positioned opposite the inner base surface of the housing; and has an extension section formed at an end section of the base plate section on the side of the concave mirror, and projects downwards from the concave mirror. [4] Head-up display device according to claim 1, wherein the blanking plate has a plurality of wall sections surrounding an outer perimeter of the display light moving from the display device to the correction mirror, at least part of a wall of the multitude of wall sections, which faces an inner side surface of the housing, is omitted to form a gap, and the housing includes a closure section that closes the gap. [5] Head-Up Display Device according to Claim 1, wherein the blanking plate holds the correction mirror and has a mirror mounting frame section which is frame-shaped, and the correction mirror is attached to the mirror mounting frame section from a direction along a propagation direction of the display light reflected by the correction mirror. [6] Head-up display device according to claim 1, wherein the blanking plate a base plate section located between the corrective mirror and the concave mirror, positioned opposite the inner base surface of the housing; and a plurality of positioning sections formed on a rear side of the base plate section opposite the inner base surface of the housing, wherein the positioning sections are positioned on positioning sections formed on the inner base surface of the housing, and at least one of the multiple positioning sections is positioned opposite the correction mirror in a direction along the indicator light between the correction mirror and the concave mirror.

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