Head-up display device

Abstract

The head-up display device comprises a support, an image generation unit and an optical adjustment unit, wherein the image generation unit and the optical adjustment unit are arranged on the support. The optical adjusting unit comprises a turning prism and at least one array type optical waveguide; the turning prism is arranged between the at least one array type optical waveguide and the image generation unit, an input port of the turning prism is coupled with an output port of the image generation unit along a first direction, and an output port of the turning prism is coupled with an input port of the at least one array type optical waveguide along a second direction; the first direction is perpendicular to the second direction. According to the invention, miniaturization of the head-up display device can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of head-up display, more particularly, to a head-up display device. BACKGROUND

[0002] The HUD (Head-Up Display) can project image information onto the windshield, so that the driver can obtain information without lowering his head. The HUD in the related art usually adopts the technical scheme of a curved mirror, and it is difficult to make the volume small under the requirements of a large field of view, a long virtual image distance and multiple depths, and it is difficult to arrange it in the driver's cabin. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a head-up display device in view of the above defects of the prior art.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a head-up display device is constructed, comprising: a support; an image generation unit arranged on the support; an optical adjustment unit arranged on the support, comprising a turning prism and at least one arrayed optical waveguide; the turning prism is arranged between the at least one arrayed optical waveguide and the image generation unit, the input port is coupled with the output port of the image generation unit along a first direction, and the output port is coupled with the input port of the at least one arrayed optical waveguide along a second direction; The first direction is perpendicular to the second direction.

[0005] Further, the arrayed optical waveguide comprises a first arrayed optical waveguide expanding pupils along a third direction and a second arrayed optical waveguide expanding pupils along the first direction, the first arrayed optical waveguide is arranged between the second arrayed optical waveguide and the turning prism along the second direction; the third direction is perpendicular to the first direction and the second direction.

[0006] Further, the turning prism is located at one end of the first arrayed optical waveguide along the third direction, and the output port is coupled with the input port of the first arrayed optical waveguide along the second direction; and / or The first arrayed optical waveguide is located at one end of the second arrayed optical waveguide along the first direction, and the output port is coupled with the input port of the second arrayed optical waveguide along the second direction.

[0007] Further, the optical adjustment unit further comprises a corrective mirror; the corrective mirror is arranged on the side of the at least one arrayed optical waveguide away from the turning prism along the second direction.

[0008] Further, the bracket is provided with a mounting groove for accommodating the at least one arrayed optical waveguide, a plurality of convex ribs are arranged on the groove wall of the mounting groove; a gap for dispensing is defined between the groove wall of the mounting groove, the at least one arrayed optical waveguide and the plurality of convex ribs; and / or The bracket is provided with a mounting groove for accommodating the turning prism, a plurality of convex ribs are arranged on the groove wall of the mounting groove; a gap for dispensing is defined between the groove wall of the mounting groove, the turning prism and the plurality of convex ribs.

[0009] Further, the bracket is provided with an optical transmission window, the image generation unit and the optical adjustment unit are respectively arranged on the opposite sides of the bracket, and are coupled through the optical transmission window.

[0010] Further, a heat dissipation unit is further included, the heat dissipation unit is arranged on the same side of the bracket as the image generation unit, and is connected with the heat generating part of the image generation unit; and / or A control unit is further included, the control unit is arranged on the same side of the bracket as the image generation unit, and is electrically connected with the image generation unit.

[0011] Further, a heat dissipation unit is further included, the heat dissipation unit is arranged on the same side of the bracket as the image generation unit, and includes a heat sink and an air flow device; The heat sink is connected with the heat generating part of the image generation unit; the air flow device is arranged on the side of the heat sink away from the image generation unit along a third direction, and an air outlet is arranged towards the heat sink; The third direction is perpendicular to the first direction and the second direction.

[0012] Further, a lower cover arranged on the bracket is further included; the image generation unit is accommodated between the lower cover and the bracket; and / or A upper cover arranged on the bracket is further included, the optical adjustment unit is accommodated between the upper cover and the bracket.

[0013] Further, a upper cover arranged on the bracket is further included, the upper cover is provided with an optical outlet for outputting an optical image; the head-up display device further includes a dustproof film; the dustproof film covers the optical outlet; and / or An air flow device and a blower cover arranged on the bracket are further included, the air flow device is accommodated between the blower cover and the bracket, and an air outlet is arranged towards the heat generating part of the image generation unit.

[0014] The present application has at least the following beneficial effects: The application can dilate pupils through the arrayed optical waveguide, can effectively reduce the volume of the optical adjustment unit under the same parameter index without setting a reflection system, and is conducive to realizing the miniaturization of the head-up display device. The turning prism is arranged, the mounting surface of the support can be reasonably utilized, the structural compactness and the flatness of the outer contour of the head-up display device are effectively improved, the miniaturization of the head-up display device is further facilitated, and the installation of the head-up display device in the cockpit is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and embodiments, and the drawings are as follows: Figure 1 is an application schematic diagram of the head-up display device in an embodiment of the application; Figure 2 is an exploded view of the head-up display device in Figure 1 Figure 3 is a structure schematic diagram of the support in Figure 2 Figure 4 is a structure schematic diagram of the support in Figure 2 Figure 5 is a structure schematic diagram of the support in Figure 2 Figure 6 Figure 5 is a partial enlarged view of the P part in Figure 7 Figure 2 is a partial enlarged view of the Q part in DETAILED DESCRIPTION

[0016] In order to have a clearer understanding of the technical features, objects and effects of the application, the specific implementation modes of the application will be described in detail with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the application, so the application is not limited by the specific embodiments disclosed below.

[0017] ​​​​​​In the description of the application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0018] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0019] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0020] In this application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above" the second feature can be directly above or obliquely above the second feature, or simply indicate that the first feature is higher than the second feature in horizontal height. The first feature "below" the second feature can be directly below or obliquely below the second feature, or simply indicate that the first feature is lower than the second feature in horizontal height.

[0021] Figures 1 to 7 A head-up display device 1 (HUD, Head-Up Display) in an embodiment of the application is shown. The head-up display device 1 can be applied to a driving device such as a vehicle, an aircraft, a ship, etc. that needs a driver to drive with his head up, so as to reduce the frequency of the driver looking down to check the instrument or the central control screen during driving, and improve the comfort and safety of driving.

[0022] As Figure 2As shown, the head-up display device 1 can include a housing 10, an image generating unit 20, an optical adjusting unit 30, a heat dissipation unit 40, and a control unit 50. The image generating unit 20, the optical adjusting unit 30, the heat dissipation unit 40, and the control unit 50 are all arranged in the housing 10. The control unit 50 is electrically connected with the image generating unit 20 and the heat dissipation unit 40 respectively, for receiving and processing external signals, and controlling the operation of the head-up display device 1. The image generating unit 20 is used for generating optical images. The optical adjusting unit 30 is coupled with the image generating unit 20, for transmitting the optical images, and for expanding and adjusting the optical images, so that the beam distribution meets the requirements of the eyebox 3. The heat dissipation unit 40 is connected with the image generating unit 20, for dissipating heat of the image generating unit 20, to avoid the product performance from being degraded or even malfunctioning due to excessive heat accumulation of the image generating unit 20.

[0023] In some embodiments, the housing 10 can include a bracket 11, an upper cover 12, a lower cover 13, a blower cover 14, and a dustproof film 15. The image generating unit 20, the optical adjusting unit 30, the heat dissipation unit 40, and the control unit 50 are all arranged on the bracket 11, and the image generating unit 20 and the optical adjusting unit 30 are arranged on opposite sides of the bracket 11, and the heat dissipation unit 40 and the control unit 50 are arranged on the same side of the bracket 11 as the image generating unit 20.

[0024] Specifically, referring to Figure 4 and Figure 5 , the bracket 11 is substantially rectangular, having a length direction and a width direction perpendicular to each other. The bracket 11 is provided with an optical transmission window 111, through which the image generating unit 20 is coupled with the optical adjusting unit 30, to transmit the optical images to the optical adjusting unit 30. The upper cover 12 and the lower cover 13 are arranged on opposite sides of the bracket 11 respectively, and the bracket 11 and the upper cover 12 define a first cavity 101 for accommodating the optical adjusting unit 30. The bracket 11 and the lower cover 13 define a second cavity 102 for accommodating the image generating unit 20 and part of the heat dissipation unit 40.

[0025] The blower cover 14 is arranged on the same side of the bracket 11 as the lower cover 13, and together with the bracket 11 defines a third cavity 103 for accommodating the airflow device 42 of the heat dissipation unit 40. The blower cover 14 can be further provided with a plurality of ventilation holes (not shown in the figure), which are in communication with the third cavity 103 and correspondingly arranged with the air inlet of the airflow device 42, to provide sufficient airflow for the operation of the airflow device 42, ensuring the heat dissipation performance of the heat dissipation unit 40.

[0026] As Figure 1 and Figure 2As shown, the upper cover 12 can also be provided with an optical outlet 121, so that the optical adjustment unit 30 outputs the adjusted optical image to the windshield 2 and then reflects to the eyebox 3. The dustproof film 15 is arranged on the upper cover 12, which is arranged at the optical outlet 121 to seal the space in the shell 10 while outputting the optical image, so as to prevent dust, impurities and the like from falling into the shell 10 to damage the imaging function of the head-up display device 1.

[0027] By arranging the upper cover 12, the lower cover 13, the air baffle 14 and the dustproof film 15, the units of the head-up display device 1 can be accommodated in the shell 10, the parts are protected, the stability of the head-up display device 1 is improved, the internal parts are prevented from being polluted by external impurities and dust, foreign matters are prevented from damaging the blades of the air flow device 42, and the service life of the head-up display device 1 is ensured.

[0028] By arranging the bracket 11, the installation and positioning of the unit parts in the shell 10 can be facilitated. In the production process, the units can be assembled on the bracket 11, and the bracket 11 is assembled to form a modular structure, and then the other covers and the baffle are arranged on the bracket 11, and the parts of the other units are accommodated in the cavities.

[0029] It should be noted that the dustproof film 15 can be pasted on the upper cover 12 by double-sided adhesive tape, glue and the like. The installation of the upper cover 12, the lower cover 13 and the air baffle 14 on the bracket 11 can be achieved by bolt connection, thread connection, buckle connection, welding, glue connection and the like, which is not limited here.

[0030] It should be noted that the shell 10 can be made of metal or plastic, which is not limited here.

[0031] In other embodiments, the shape of the bracket 11 can also be oval, polygonal, irregular and the like.

[0032] In other embodiments, the lower cover 13 and the air baffle 14 can be integrally arranged.

[0033] In other embodiments, the upper cover 12 and the lower cover 13 can be connected to each other to define a cavity, and the bracket 11 is arranged in the cavity and divides it into a first cavity 101 and a second cavity 102.

[0034] In other embodiments, when the heat dissipation unit 40 is not provided with the air flow device 42, the shell 10 can also not include the air baffle 14.

[0035] As shown in FIG. 1, the head-up display device 1 includes a shell 10, a bracket 11, an optical unit 20, a heat dissipation unit 40, an air flow device 42 and a dustproof film 15. Figure 2 and Figure 3As shown, in some embodiments, the image generation unit 20 has at least one heat-generating element 21, which can generate heat during operation. The heat dissipation unit 40 may include a radiator 41 and an airflow device 42, wherein the radiator 41 and the airflow device 42 are both mounted on the bracket 11 and located on the same side of the bracket 11 as the image generation unit 20. The radiator 41 is connected to the heat-generating element 21 of the image generation unit 20 and is used to absorb the heat generated by the heat-generating element 21 during operation and to exchange heat with the air to dissipate the absorbed heat. The air outlet of the airflow device 42 is arranged towards the radiator 41 to accelerate the heat exchange rate between the radiator 41 and the air.

[0036] Specifically, the radiator 41 may include a heat sink 411 and at least one heat conductor 412. The heat conductor 412 is connected to both the heat sink 411 and the heat generating element 21 to conduct heat generated by the heat generating element 21 to the heat sink 411. The heat sink 411 is used to exchange heat with the air to dissipate heat. The airflow device 42 is located in the third chamber 103 defined by the blower shroud 14 and the support 11, and its air outlet is oriented towards the heat sink 411 to accelerate the rate of heat exchange between the heat sink 411 and the air.

[0037] Furthermore, the heat sink 411 may include a fin mounting plate 4112 and a plurality of heat dissipation fins 4111. The plurality of heat dissipation fins 4111 are disposed on the fin mounting plate 4112 to collect the heat transferred by the heat conductor 412 and exchange it with the air. The fin mounting plate 4112 is disposed on the bracket 11 and is used to connect the heat dissipation fins 4111 and each heat conductor 412. The end of the heat conductor 412 away from the heat-generating component 21 is disposed on the side of the fin mounting plate 4112 opposite to the heat dissipation fins 4111 to improve heat conduction. The air outlet of the airflow device 42 is oriented towards the heat dissipation fins 4111.

[0038] It should be noted that the heat-conducting element 412 can be connected to at least one heat-generating element 21. When there are multiple heat-conducting elements 412, the number of heat-generating elements connected to each heat-conducting element 412 can be the same or different. Each heat-generating element can also be connected to at least one heat-conducting element 412. When there are multiple heat-generating elements, the number of heat-conducting elements 412 connected to each heat-generating element can be the same or different.

[0039] This invention improves upon traditional passive cooling methods by including a heat sink 41 and an airflow device 42 in the heat dissipation unit 40, thereby enhancing heat dissipation efficiency through the airflow device 42. Consequently, the heat sink 41 does not require a large heat dissipation surface, reducing its size and consequently miniaturizing the head-up display device 1.

[0040] The heat dissipating unit 41 is provided with only one heat dissipating piece 411, and when the number of the heat conducting pieces 412 is multiple, the heat sources transmitted by the multiple heat conducting pieces are transmitted to the same heat dissipating piece 411, so that the heat is concentrated at the same position, and then the concentrated position is blown by the air flow device 42, so that the heat dissipation capacity is improved while the volume is reduced, and the head-up display device 1 is miniaturized.

[0041] It should be noted that the heat generating element can be flexibly defined based on the heat generating electronic element of the image generating unit 20. For example, when the chip of the image generating unit 20 generates heat during operation, the chip and the mounting plate (or circuit board) where the chip is located can be defined as the heat generating element. When the LED lamp of the image generating unit 20 generates heat during operation, the LED lamp and the lamp plate where the LED lamp is located can also be defined as the heat generating element. No specific definition is made here.

[0042] It should be noted that the air flow device 42 can be realized by using existing fans, blowers, and air flow devices, and no specific definition is made here.

[0043] As shown in Figure 3 , the length direction of the bracket 11 is defined as the third direction X, and the width direction is defined as the first direction Y. Then in some embodiments, the image generating unit 20, the heat dissipating unit 41 and the air flow device 42 can be connected in sequence along the third direction X, and the air flow device 42 is arranged on the side of the heat dissipating unit 41 away from the image generating unit 20 along the third direction X.

[0044] By arranging the image generating unit 20, the heat dissipating unit 41 and the air flow device 42 in sequence along the third direction X, the structural size of the bracket 11 can be effectively utilized, so that the heat dissipating unit 40 and the image generating unit 20 are installed on the same side of the bracket 11, and it is ensured that they are within the range covered by the bracket 11. In this way, the rationality of the layout of each component on the bracket 11 can be improved while the heat dissipation performance is ensured, the space utilization rate is improved, and the miniaturization of the head-up display device 1 is further realized.

[0045] Specifically, referring to Figure 4 , the side of the bracket 11 facing the image generating unit 20 and the heat dissipating unit 40 is provided with a first mounting groove 112 and a second mounting groove 113. The second mounting groove 113 is located on the side of the first mounting groove 112 along the third direction X, the image generating unit 20 and the heat dissipating unit 41 of the heat dissipating unit 40 are arranged in the first mounting groove 112, and the air flow device 42 is arranged in the second mounting groove 113.

[0046] Referring to Figure 2The air-blast cover 14 is located on one side of the lower cover 13 along the third direction X, and an opening 141 is arranged at one end of the lower cover 13 along the third direction X, so that the air outlet of the airflow device 42 can be arranged towards the radiator 41 through the opening 141. The lower cover 13 is provided with a gap 131 on the side close to the air-blast cover 14 along the third direction X, which is arranged corresponding to the heat dissipation fins 4111 of the radiator 41. When the heat dissipation unit 40 is assembled with the shell 10, the fin mounting plate 4112 is arranged at the gap 131 to ensure the sealing of the first chamber 101. The heat dissipation fins 4111 extend to the outside of the first chamber 101 through the gap 131, so as to exchange heat with the outside air and improve the heat dissipation efficiency.

[0047] By arranging the first mounting groove 112 and the second mounting groove 113, the overall thickness of the image generation unit 20 and the heat dissipation unit 40 after being assembled to the bracket 11 can be reduced, embedded assembly can be realized, the structural compactness is improved, and further the miniaturization of the head-up display device 1 is facilitated.

[0048] Meanwhile, the arrangement of the first mounting groove 112 and the second mounting groove 113 can also limit the image generation unit 20 and the heat dissipation unit 40 along the third direction X and the first direction Y, improve the assembly precision of the parts, and facilitate batch production.

[0049] It should be noted that the image generation unit 20 and the radiator 41 can be arranged in the first mounting groove 112 by means of bolt connection, buckle connection, glue connection, welding, etc., and the airflow device 42 can be arranged in the second mounting groove 113 by means of bolt connection, buckle connection, glue connection, welding, etc., which are not limited here.

[0050] In other embodiments, the first mounting groove 112 and the second mounting groove 113 can also be connected to form one groove structure.

[0051] In other embodiments, the bracket 11 can also not be provided with the first mounting groove 112 and the second mounting groove 113, and the image generation unit 20 and the heat dissipation unit 40 can be directly arranged on the bracket 11.

[0052] As Figure 2As shown, in some embodiments, the optical adjustment unit 30 can include a turning prism 33, a corrective lens 34, and at least one arrayed optical waveguide. The turning prism 33, the corrective lens 34, and the arrayed optical waveguide are all arranged on the support 11. The arrayed optical waveguide is used to expand the pupil of the optical image output by the image generation unit 20 in a certain direction. The turning prism 33 is arranged between the arrayed optical waveguide and the image generation unit 20, the input port is coupled with the output port of the image generation unit 20, the output port is coupled with the input port of the arrayed optical waveguide, and is used to change the transmission direction of the optical image. The corrective lens 34 is arranged on the side of the arrayed optical waveguide away from the turning prism 33 along the optical transmission path, the input port is coupled with the output port of the arrayed optical waveguide, and is used to correct and adjust the optical image so that it is transmitted to the windshield 2 to be clear and accurate.

[0053] Specifically, the turning prism 33, the corrective lens 34, and the at least one arrayed optical waveguide are all arranged on the side of the support 11 away from the image generation unit 20, and the input port of the turning prism 33 is coupled with the output port of the image generation unit 20 through the optical transmission window 111.

[0054] The number of arrayed optical waveguides can be two, which are defined as a first arrayed optical waveguide 31 and a second arrayed optical waveguide 32. The first arrayed optical waveguide 31 is arranged between the turning prism 33 and the second arrayed optical waveguide 32 along the second direction Z, the input port is coupled with the output port of the turning prism 33, the output port is coupled with the input port of the second arrayed optical waveguide 32, and is used to expand the pupil of the optical image along the third direction X. The second arrayed optical waveguide 32 is arranged between the first arrayed optical waveguide 31 and the corrective lens 34 along the second direction Z, the output port is coupled with the input port of the corrective lens 34, and is used to expand the pupil of the optical image along the first direction Y.

[0055] The second direction Z is perpendicular to the third direction X and the first direction Y.

[0056] It should be understood that the head-up display device in the related art uses a reflection system for optical adjustment. The increase of FOV (field of view), VID (virtual image distance), and other indicators will cause the increase of the volume occupied by the reflection system, and thus the head-up display device has a large volume and is difficult to arrange in the cockpit. In addition, different cockpits are equipped with different windshields, and the overall design is also different, which leads to a low reuse rate of the head-up display device and a high overall cost.

[0057] Compared with the optical adjustment unit of the reflection mirror type, the arrayed optical waveguide is arranged to expand the pupil in the present application, which can effectively reduce the volume of the optical adjustment unit under the same parameter indicators, and thus reduce the volume occupation of the head-up display device 1.

[0058] Meanwhile, by setting two arrayed optical waveguides respectively expanding pupils in the vertical direction, the effect of hierarchical bidirectional pupil expansion can be achieved. Compared with single arrayed optical waveguide for pupil expansion, the volume of the optical adjustment unit can be further reduced under the same field of view index, thereby further realizing the miniaturization of the head-up display device 1. In this way, the head-up display device 1 constructed by the present application can be reduced to 1 / 3 of the head-up display device using a reflection system in the related art.

[0059] By setting the bracket 11 to be substantially rectangular extending along the third direction X and the first direction Y, and setting the first arrayed optical waveguide 31 and the second arrayed optical waveguide 32 to expand pupils along the third direction X and the first direction Y respectively, the mounting surface of the bracket 11 can be effectively utilized, and the space utilization rate can be improved.

[0060] It should be noted that the arrayed optical waveguide, the turning prism 33 and the corrective lens 34 can be realized by using existing technologies, for example, the corrective lens 34 can be a compensating lens, and the like, which will not be further expanded here.

[0061] In other embodiments, the optical adjustment unit 30 can only include the turning prism 33 and at least one arrayed optical waveguide. Or the optical adjustment unit 30 can only include the corrective lens 34 and at least one arrayed optical waveguide. Or the optical adjustment unit 30 only includes at least one arrayed optical waveguide.

[0062] In other embodiments, the turning prism 33 can also be disposed on the same side of the bracket 11 as the image generation unit 20, and the output port thereof is coupled with the first arrayed optical waveguide 31 through the optical transmission window 111.

[0063] In other embodiments, the first arrayed optical waveguide 31 can also expand the optical image along the first direction Y, and the second arrayed optical waveguide 32 can expand along the third direction X. Or, the first arrayed optical waveguide 31 and the second arrayed optical waveguide 32 can also expand along other two perpendicular directions.

[0064] As shown in FIGS. Figure 2 and Figure 5 In some embodiments, the turning prism 33 is disposed on one side of the image generation unit 20 along the first direction Y, and is disposed on one side of the first arrayed optical waveguide 31 away from the second arrayed optical waveguide 32 along the second direction Z. The input port of the turning prism 33 and the output port of the image generation unit 20 both extend along the first direction Y, so as to be coupled along the first direction Y. The output port of the turning prism 33 and the input port of the first arrayed optical waveguide 31 both extend along the second direction Z, so as to be coupled along the second direction Z. In this way, the turning prism 33 can transmit the optical image outputted by the image generation unit 20 along the first direction Y to the first arrayed optical waveguide 31 along the second direction Z after turning.

[0065] It is necessary to understand that, with Figure 2 Taking the angle shown as an example, the size of the image generation unit 20 in the third direction X is greater than its size in the first direction Y (that is, the size of the image generation unit 20 along its output port upward), and its size in the first direction Y is greater than its size in the second direction Z.

[0066] If changes Figure 2 The image generation unit 20 is positioned so that its output port faces the second direction Z, allowing it to directly couple with the first array-type optical waveguide whose input port also faces the second direction Z. This reduces its mounting area on the bracket 11 and increases its height protruding from the bracket 11. This not only makes inefficient use of the mounting surface of the bracket 11 but also increases the thickness of the head-up display device 1 in the second direction Z, hindering its miniaturization and installation in the cockpit.

[0067] By incorporating a deflecting prism 33, this invention effectively reduces the height of the image generation unit 20 protruding from the bracket 11, allowing a larger side of the unit to be mounted on the bracket 11. This optimizes the use of the bracket 11's mounting surface, improves installation stability, and provides greater flexibility in the arrangement of the image generation unit 20 on the bracket 11. Simultaneously, it effectively enhances the structural compactness and flatness of the head-up display device 1, further facilitating its miniaturization and installation within the cockpit.

[0068] Specifically, such as Figure 2 and Figure 5 As shown, the bracket 11 has a recessed third mounting groove 114 for accommodating the deflection prism 33. The opening of the third mounting groove 114 faces the first arrayed optical waveguide 31 to facilitate coupling between the output port of the deflection prism 33 and the input port of the first arrayed optical waveguide 31. An optical transmission window 111 is located on the groove wall of the third mounting groove 114 and is positioned with both the deflection prism 33 and the image generation unit 20 to facilitate coupling between the input port of the deflection prism 33 and the output port of the image generation unit 20 through the optical transmission window 111.

[0069] Further reading Figure 6 The third mounting groove 114 has multiple protruding ribs on its groove wall to position the turning prism 33 within the third mounting groove 114 and to form a dispensing gap. When the turning prism 33 is assembled into the third mounting groove 114, the protruding ribs are located between the groove wall of the third mounting groove 114 and the turning prism 33. A gap is formed in the unoccupied space between the turning prism 33 and the groove wall of the third mounting groove 114 for dispensing adhesive.

[0070] For example in Figure 5In the embodiment shown, the third mounting groove 114 has a plurality of first ribs 16 arranged circumferentially on its sidewall and a plurality of second ribs 17 arranged on its bottom wall.

[0071] During the production process, the prism 33 can be placed in the third mounting groove 114 first, and then glue can be filled into the gap between the prism 33 and the side wall of the third mounting groove 114 to achieve stable fixation of the prism 33 in the third mounting groove 114.

[0072] By setting ribs on the wall of the third mounting groove 114, the assembly accuracy of the turning prism 33 can be improved, and a dispensing gap can be constructed to achieve the stability of the turning prism 33 in the third mounting groove 114 by dispensing adhesive. At the same time, it can also improve the convenience of production, so as to facilitate mass production.

[0073] By providing a second protruding rib 17 on the bottom wall of the third mounting groove 114, the structural strength of the bottom wall of the third mounting groove 114 can be improved, which in turn improves the structural strength of the bracket 11 and ensures the service life of the head-up display device 1.

[0074] In some other embodiments, the third mounting groove 114 may also contain only the first protruding rib 16.

[0075] In some other embodiments, when the installation space of the cockpit allows the output port of the image generation unit 20 to be directly coupled to the input port of the first arrayed optical waveguide 31 in the second direction Z, the optical adjustment unit 30 may not be equipped with the deflection prism 33.

[0076] In some other embodiments, provided that the mounting area of ​​the bracket 11 allows, the output port of the image generation unit 20 and the input port of the deflection prism 33 can also be coupled along a third direction X.

[0077] In some embodiments, the deflection prism 33 is located at one end of the first arrayed optical waveguide 31 along the third direction X, and on one side of the corresponding end of the first arrayed optical waveguide 31 along the second direction Z, so as to couple with its input port along the second direction Z.

[0078] Specifically, such as Figure 5 As shown, the bracket 11 has a fourth mounting groove 115 recessed along the second direction Z on the side facing the arrayed optical waveguide, for accommodating the first arrayed optical waveguide 31. The fourth mounting groove 115 extends along the third direction X, and the first arrayed optical waveguide 31 is disposed in the fourth mounting groove 115 along the third direction X to expand the pupil of the optical image along the third direction X.

[0079] The bottom wall of the fourth mounting groove 115 is further recessed along the second direction X at one end of the third direction X to form the third mounting groove 114. In this way, when the turning prism 33 is assembled into the third mounting groove 114, the output port thereof is substantially flush with the bottom wall of the fourth mounting groove 115 to ensure the flatness of the installation of the first arrayed optical waveguide 31.

[0080] Further, a plurality of ribs are arranged on the groove wall of the fourth mounting groove 115 to position the first arrayed optical waveguide 31 in the fourth mounting groove 115 and form a dispensing gap. When the first arrayed optical waveguide 31 is assembled into the fourth mounting groove 115, the ribs are located between the groove wall of the fourth mounting groove 115 and the first arrayed optical waveguide 31, and a gap is formed between the groove wall of the fourth mounting groove 115 and the first arrayed optical waveguide 31 at positions not occupied by the ribs for dispensing.

[0081] For example, in the embodiment shown in Figure 5 In the embodiment shown, a plurality of first ribs 16 are arranged on the side wall of the fourth mounting groove 115 in the circumferential direction, and a plurality of second ribs 17 are arranged on the bottom wall.

[0082] In the production process, after the turning prism 33 is assembled, the first arrayed optical waveguide 31 can be placed in the fourth mounting groove 115 first, and then glue is filled into the gap between the first arrayed optical waveguide 31 and the side wall of the fourth mounting groove 115 to achieve stable fixation of the first arrayed optical waveguide 31 in the fourth mounting groove 115.

[0083] By arranging ribs on the groove wall of the fourth mounting groove 115, the assembly precision of the first arrayed optical waveguide 31 can be improved, and a dispensing gap can be constructed to achieve stable fixation of the first arrayed optical waveguide 31 in the fourth mounting groove 115 through dispensing, while the production convenience can also be improved to facilitate mass production.

[0084] By arranging the second ribs 17 on the bottom wall of the fourth mounting groove 115, the structural strength of the bottom wall of the fourth mounting groove 115 can be improved, i.e., the structural strength of the bracket 11 is further improved to ensure the service life of the head-up display device 1.

[0085] In some other embodiments, only the first ribs 16 can be arranged in the fourth mounting groove 115.

[0086] In some other embodiments, the third mounting groove 114 can also be located at a middle position of the fourth mounting groove 115 along the third direction X, or at other positions, so that the turning prism 33 is coupled to a middle position of the first arrayed optical waveguide 31 along the third direction X, or to any other position.

[0087] In some embodiments, the first arrayed optical waveguide 31 is located at one end of the second arrayed optical waveguide 32 along the first direction Y and on one side of the second arrayed optical waveguide 32 along the second direction Z, so as to couple with its input port along the second direction Z.

[0088] Specifically, the bracket 11 has a fifth mounting groove 116 recessed along the second direction Z on the side facing the arrayed optical waveguide, for accommodating the second arrayed optical waveguide 32. The fifth mounting groove 116 is generally rectangular in shape perpendicular to the second direction Z, and its dimension in the first direction Y is larger than that of the fourth mounting groove 115 in the first direction Y.

[0089] The bottom wall of the fifth mounting groove 116 is further recessed at one end along the first direction Y to form a fourth mounting groove 115 along the second direction Z. Thus, when the first arrayed optical waveguide 31 is assembled into the fourth mounting groove 115, its output port is approximately flush with the bottom wall of the fifth mounting groove 116, ensuring the flatness of the second arrayed optical waveguide 32 during installation.

[0090] Furthermore, the fifth mounting groove 116 may have multiple protruding ribs on its groove wall for positioning the second arrayed optical waveguide 32 within the fifth mounting groove 116 and forming a dispensing gap. When the second arrayed optical waveguide 32 is assembled into the fifth mounting groove 116, the protruding ribs are located between the groove wall of the fifth mounting groove 116 and the second arrayed optical waveguide 32, forming a gap between the groove wall of the fifth mounting groove 116 and the second arrayed optical waveguide 32 where the protruding ribs are not occupied, for dispensing adhesive.

[0091] For example in Figure 5 In the embodiment shown, the fifth mounting groove 116 has a plurality of first protruding ribs 16 arranged circumferentially on its side wall and a plurality of second protruding ribs 17 arranged on its bottom wall.

[0092] During the production process, after the prism 33 and the first arrayed optical waveguide 31 are assembled, the second arrayed optical waveguide 32 can be placed in the fifth mounting groove 116, and then glue can be filled into the gap between the second arrayed optical waveguide 32 and the side wall of the fifth mounting groove 116 to achieve stable fixation of the second arrayed optical waveguide 32 in the fifth mounting groove 116.

[0093] By providing protruding ribs on the sidewall of the fifth mounting slot 116, the assembly accuracy of the second array optical waveguide 32 can be improved, and a dispensing gap can be constructed to achieve the stability of fixing the second array optical waveguide 32 in the fifth mounting slot 116 through dispensing. At the same time, it can also improve the convenience of production, so as to facilitate mass production.

[0094] By providing a second protruding rib 17 on the bottom wall of the fifth mounting groove 116, the structural strength of the bottom wall of the fifth mounting groove 116 can be improved, which in turn further improves the structural strength of the bracket 11 and ensures the service life of the head-up display device 1.

[0095] In some other embodiments, the fifth mounting groove 116 may also contain only the first protruding rib 16.

[0096] In some other embodiments, the fourth mounting slot 115 may also be located at the middle position of the fifth mounting slot 116 or at other positions along the first direction Y, so that the first arrayed optical waveguide 31 is coupled to the middle position of the second arrayed optical waveguide 32 or at other arbitrary positions along the first direction Y.

[0097] By providing the third mounting slot 114, the fourth mounting slot 115, and the fifth mounting slot 116, this invention can further reduce the overall thickness of the optical adjustment unit 30 after it is assembled to the bracket 11, achieving embedded assembly, further improving the compactness of the structure, and thus further facilitating the miniaturization of the head-up display device 1. Simultaneously, the arrangement of the three mounting slots also facilitates the placement of the first array-type optical waveguide 31 along the second direction Z between the deflection prism 33 and the second array-type optical waveguide 32, improving the ease of assembly and promoting mass production.

[0098] Since the deflection prism 33 is disposed on one side of the image generation unit 20 along the first direction Y, and the heat dissipation unit 40 is located on one side of the image generation unit 20 along the third direction X, both the heat dissipation unit 40 and the image generation unit 20 are located on one side of the first array-type optical waveguide 31 along the first direction Y. That is, the first mounting slot 112 and the second mounting slot 113 are located on one side of the third mounting slot 114 and the fourth mounting slot 115 along the first direction Y, and only correspond to a portion of the fifth mounting slot 116. In this way, the mounting slots can be staggered, which reduces the thickness of the bracket 11, improves the structural compactness, and avoids the bracket 11 being too thin, thus ensuring the structural strength of the bracket 11.

[0099] like Figure 5 and Figure 7 As shown, in some embodiments, the bracket 11 may also be provided with stepped surfaces 117 on both sides opposite to each other along the third direction X for mounting the corrective lens 34.

[0100] Specifically, the stepped surface 117 is disposed along the second direction Z on the side of the fifth mounting groove 116 away from the fourth mounting groove 115, and includes a first wall 1171 and a second wall 1172 perpendicularly connected to the first wall 1171. The first wall 1171 is perpendicular to the second direction Z, perpendicularly connected to the side wall of the fifth mounting groove 116, and located outside the fifth mounting groove 116, serving to support the corrective lens 34. The second wall 1172 is perpendicular to the third direction X, perpendicularly connected to the first wall 1171, and parallel to the side wall of the fifth mounting groove 116, serving to limit the position of the corrective lens 34.

[0101] Furthermore, the stepped surface 117 may also be provided with multiple protruding ribs to position the corrective lens 34 and create a dispensing gap. When the corrective lens 34 is assembled to the bracket 11, the protruding ribs are located between the stepped surface 117 and the corrective lens 34, and a gap is formed in the position between the stepped surface 117 and the corrective lens 34 that is not occupied by the protruding ribs, for dispensing adhesive.

[0102] For example in Figure 7 In the embodiment shown, the second wall 1172 is provided with a plurality of first protruding ribs 16.

[0103] During the production process, after the conversion prism 33, the first array optical waveguide 31 and the second array optical waveguide 32 are assembled, the correction mirror 34 can be placed on the stepped surface 117, and then glue is filled into the gap between the correction mirror 34 and the second wall 1172 to achieve stable fixation of the correction mirror 34 on the bracket 11.

[0104] By setting the first protruding rib 16 on the second wall 1172, the assembly accuracy of the corrective mirror 34 can be improved, and a dispensing gap can be constructed to achieve the stability of the corrective mirror 34 by dispensing adhesive. At the same time, it can also improve the convenience of production so as to facilitate mass production.

[0105] In some other embodiments, a plurality of second ribs 17 may also be provided on the first wall 1171 to improve the structural strength of the step surface 117 and ensure the service life of the head-up display device 1.

[0106] In some other embodiments, the stepped surface 117 may also be disposed on the two opposite sides of the support 11 along the first direction Y, or on at least the two adjacent sides of the support 11.

[0107] In some other embodiments, the side of the bracket 11 facing the arrayed optical waveguide may also have a sixth mounting groove recessed along the second direction Z for accommodating the corrective lens 34. The bottom wall of the sixth mounting groove is further recessed along the second direction Z to form the fifth mounting groove 116, and at least some of the protruding ribs are provided on the side wall of the sixth mounting groove.

[0108] It should be noted that the first protruding rib 16 can be in various shapes such as protrusion, rib, or block. The size of the first protruding rib 16 can be flexibly set based on the size of the mounting groove (first mounting groove 112, second mounting groove 113, third mounting groove 114, fourth mounting groove 115, and fifth mounting groove 116) in which it is located, and no specific limitation is made here. The second protruding rib 17 is similar.

[0109] like Figure 2 and Figure 3 As shown, in some embodiments, the control unit 50 may include a main control board disposed on the side of the bracket 11 facing the image generation unit 20 and corresponding to the fourth mounting slot 115.

[0110] Specifically, the control unit 50 is located on one side of the optical prism 33 along the third direction X, and on one side of the image generation unit 20 and the heat dissipation unit 40 along the first direction Y. In this way, the mounting space on the side of the bracket 11 facing the image generation unit 20 corresponding to the optical prism 33 can be effectively utilized, further improving the rationality of the mounting layout of each unit on the bracket 11, improving the compactness of the internal structure of the housing 10, and facilitating the miniaturization of the head-up display device 1.

[0111] It should be noted that the main control board can be installed on the bracket 11 by means of bolt connection, snap connection, glue connection, welding, etc., and no specific limitation is made here.

[0112] Understandably, the above-mentioned technical features can be used in any combination without restriction.

[0113] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application's patent. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of this application, and can also make several modifications and improvements, all of which fall within the protection scope of this application. Therefore, any equivalent transformations and modifications made within the scope of the claims of this application should be covered by the claims of this application.

Claims

1. A head-up display device, characterized by, The application relates to a support (11), an image generating unit (20) arranged on the support (11), an optical adjusting unit (30) arranged on the support (11), and a heat dissipating unit (40) arranged on the support (11). The optical adjusting unit (30) comprises a turning prism (33) and at least one arrayed optical waveguide; the turning prism (33) is arranged between the at least one arrayed optical waveguide and the image generating unit (20); an input port of the turning prism (33) is coupled with an output port of the image generating unit (20) along a first direction; and an output port of the turning prism (33) is coupled with an input port of the at least one arrayed optical waveguide along a second direction. The first direction is perpendicular to the second direction. The arrayed optical waveguide comprises a first arrayed optical waveguide (31) expanded along a third direction and a second arrayed optical waveguide (32) expanded along the first direction; the first arrayed optical waveguide (31) is arranged between the second arrayed optical waveguide (32) and the turning prism (33) along the second direction; and the third direction is perpendicular to the first direction and the second direction. The turning prism (33) is located at one end of the first arrayed optical waveguide (31) along the third direction; and the output port of the turning prism (33) is coupled with the input port of the first arrayed optical waveguide (31) along the second direction; and / or 2. The head-up display device of claim 1, wherein, The first arrayed optical waveguide (31) is located at one end of the second arrayed optical waveguide (32) along the first direction; and the output port of the first arrayed optical waveguide (31) is coupled with the input port of the second arrayed optical waveguide (32) along the second direction.

3. The head-up display device of claim 2, wherein, The optical adjusting unit (30) further comprises a correcting mirror (34); the correcting mirror (34) is arranged on a side of the at least one arrayed optical waveguide away from the turning prism (33) along the second direction. The support (11) is provided with a mounting groove for accommodating the at least one arrayed optical waveguide; a plurality of convex ribs are arranged on a groove wall of the mounting groove; and a gap for dispensing is defined among the groove wall of the mounting groove, the at least one arrayed optical waveguide and the plurality of convex ribs; and / or 4. The head-up display device of claim 1, wherein, The support (11) is provided with a mounting groove for accommodating the turning prism (33); a plurality of convex ribs are arranged on a groove wall of the mounting groove; and a gap for dispensing is defined among the groove wall of the mounting groove, the turning prism (33) and the plurality of convex ribs.

5. The head-up display apparatus according to claim 1, wherein The support (11) is provided with an optical transmission window (111); the image generating unit (20) and the optical adjusting unit (30) are arranged on opposite sides of the support (11) respectively and are coupled through the optical transmission window (111). The heat dissipating unit (40) is arranged on the same side of the support (11) as the image generating unit (20) and is connected with a heat generating part (21) of the image generating unit (20); and / or 6. The head-up display device according to any one of claims 1 to 5, characterized in that The control unit (50) is arranged on the same side of the support (11) as the image generating unit (20) and is electrically connected with the image generating unit (20).

7. The head-up display device according to any one of claims 1 to 5, characterized by ​ ​ 8. The head-up display device according to any one of claims 1 to 5, characterized by Further comprising a heat dissipation unit (40) disposed on the same side of the support (11) as the image generation unit (20), comprising a heat sink (41) and an air flow device (42); The heat sink (41) is connected with a heat generating part (21) of the image generation unit (20); the air flow device (42) is disposed on a side of the heat sink (41) away from the image generation unit (20) along a third direction, and an air outlet is disposed towards the heat sink (41); The third direction is perpendicular to the first direction and the second direction.

9. The head-up display device according to any one of claims 1 to 5, characterized by Further comprising a lower cover (13) disposed on the support (11); the image generation unit (20) is accommodated between the lower cover (13) and the support (11); and / or Further comprising an upper cover (12) disposed on the support (11), and the optical adjustment unit (30) is accommodated between the upper cover (12) and the support (11).

10. The head-up display device according to any one of claims 1 to 5, characterized by Further comprising an upper cover (12) disposed on the support (11), and an optical outlet (121) outputting an optical image is disposed on the upper cover (12); the head-up display device further comprises a dustproof film (15); the dustproof film (15) covers the optical outlet (121); and / or Further comprising an air flow device (42) and a blower cover (14) disposed on the support (11); the air flow device (42) is accommodated between the blower cover (14) and the support (11), and an air outlet is disposed towards a heat generating part (21) of the image generation unit (20).

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