A calibration device and a calibration system
By designing a calibration device that includes a housing, limiting components, and light transmission components, the problem of low calibration efficiency of head-up displays was solved, and an efficient and simple calibration process was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO ECHENG TECHNOLOGY CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-06-26
AI Technical Summary
Existing head-up display calibration methods are inefficient and complex to operate, requiring calibration to be performed together with the windshield.
A calibration device is provided, including a housing, a limiting member, and a light-transmitting member. The limiting member limits the device to a head-up display, and the light path is adjusted by the incident and exit windows of the light-transmitting member to calibrate the head-up display.
It improves calibration efficiency, simplifies the operation process, and is small in size, easy to move, and suitable for flexible deployment.
Smart Images
Figure CN224416408U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of head-up display technology, and more particularly to a calibration device and calibration system. Background Technology
[0002] A head-up display (HUD) is an auxiliary display device used in vehicles that projects driving information into the driver's field of vision, allowing the driver to view information without looking down, thereby improving driving safety.
[0003] With the increasing popularity of intelligent vehicles, the installation rate of head-up displays is getting higher and higher. Generally, head-up displays need to be calibrated to ensure that driving information and other information can be projected into the driver's field of vision so that the driver can see the projected information.
[0004] To ensure that the size, shape, color, and brightness of the projected image are optimal, head-up displays (HUDs) need to be calibrated after manufacturing. The current method of calibrating HUDs involves assembling them along with the windshield into a calibration device after the entire unit is installed. This method suffers from low calibration efficiency and complex operation. Utility Model Content
[0005] In view of the above problems, embodiments of this application provide a calibration device and a calibration system that overcome or at least partially solve the above problems.
[0006] According to one aspect of the embodiments of this application, a calibration device is provided, including a housing, a limiting member, and at least two light-transmitting members; the housing has a receiving cavity and an entrance window and an exit window communicating with the receiving cavity; the limiting member is disposed in the housing and is used to limit the head-up display; the light-transmitting members are located in the receiving cavity, and at least two light-transmitting members are spaced apart; each light-transmitting member is provided with a light-transmitting hole, and the light-transmitting holes of the at least two light-transmitting members are spaced apart along the design optical axis of the head-up display; the entrance window is used for the projection beam of the head-up display to enter, and the exit window is used for the projection beam to exit.
[0007] In one alternative embodiment, the limiting element includes a first limiting block and a second limiting block that are independent of each other. The first limiting block is used to limit the position of the device to a first area of the head-up display, and the second limiting block is used to limit the position of the device to a second area of the head-up display.
[0008] In one alternative embodiment, the first limiting block has a slot for engaging the first area of the head-up display.
[0009] In one alternative embodiment, the first limiting block includes a first limiting portion and a second limiting portion, and the slot is formed between the first limiting portion and the second limiting portion.
[0010] In one alternative, the second limiting block has an arc surface that adapts to the contour shape of the second region of the head-up display.
[0011] In one alternative embodiment, the housing has a first portion and a second portion spaced apart; the light-transmitting element is disposed between the first portion and the second portion; a first limiting block is disposed at one end of the first portion, and a second limiting block is disposed at one end of the second portion; the incident window is formed between the first limiting block and the second limiting block; and the exit window is formed between the other end of the first portion and the other end of the second portion.
[0012] In one alternative embodiment, the calibration device further includes a camera positioned close to the exit window, along the design optical axis of the head-up display, with the camera lens positioned corresponding to the light-transmitting aperture.
[0013] In an alternative embodiment, the calibration device further includes a support member disposed on the housing, and the camera is mounted on the support member.
[0014] In one alternative embodiment, the radius of the light-transmitting aperture is R, the number of light-transmitting elements is two, and the distance between the two light-transmitting apertures along the design optical axis of the head-up display is L, where arctan(R / L) < 0.3°.
[0015] According to one aspect of the embodiments of this application, a calibration system is provided, including a head-up display and the calibration device; the head-up display has a design optical axis; and the limiting member is limited within the head-up display.
[0016] The beneficial effects of this application embodiment are as follows: A calibration device is provided, including a housing, a limiting member, and at least two light-transmitting members; the housing has a receiving cavity and an entrance window and an exit window communicating with the receiving cavity; the limiting member is disposed in the housing and is used to limit the head-up display; the light-transmitting members are located in the receiving cavity, and at least two light-transmitting members are spaced apart; the light-transmitting members are provided with light-transmitting holes, and the light-transmitting holes of the at least two light-transmitting members are spaced apart along the design optical axis of the head-up display; the entrance window is used for the projection beam of the head-up display to enter, and the exit window is used for the projection beam to exit. This calibration device, when calibrating a head-up display (HUD), limits the position of the HUD by positioning the limiting component. The projected beam from the HUD's optical path adjustment unit enters the housing through the entrance window. By adjusting the HUD's optical path adjustment unit, when the HUD's projected beam coincides with the HUD's designed optical axis, the projected beam exits from the exit window, thus achieving HUD calibration. This application achieves HUD calibration through a calibration device; simply limiting the calibration device to the HUD is sufficient for calibration, resulting in high efficiency and simple operation. Furthermore, the calibration device provided in this application is small in size, easy to move, and facilitates flexible deployment within a calibration system. Attached Figure Description
[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0018] Figure 1 It is an imaging optical path diagram of a head-up display.
[0019] Figure 2 This is the optical path diagram of the calibration system.
[0020] Figure 3 This is a schematic diagram of one implementation method for calibrating equipment.
[0021] Figure 4 It is an optical path diagram of an uncalibrated head-up display and calibration equipment.
[0022] Figure 5 This is a schematic diagram of another implementation method for calibrating equipment.
[0023] Figure 6 It is an optical path diagram of an alternative implementation of an uncalibrated head-up display and calibration equipment.
[0024] Figure 7 It is an optical path diagram of another implementation of a calibrated head-up display and calibration equipment.
[0025] The labels in the attached diagram are as follows:
[0026] 100. Calibration system; 200. Windshield; 300. Eyes; 400. Virtual image;
[0027] 10. Head-up display; 20. Calibration equipment;
[0028] S, projected beam; o1, designed optical axis;
[0029] 11. Outer shell; 12. Image generation unit; 13. First reflector; 14. Second reflector;
[0030] 111. First region; 112. Second region; 1111. Snap-fit structure; 1121. Curved surface structure;
[0031] 21. Housing; 22. Limiting component; 23. Light transmission component; 24. Camera; 25. Support component;
[0032] 21s, containment cavity; 21a, entrance window; 21b, exit window;
[0033] 211. Part One; 212. Part Two;
[0034] 221, First limiting block; 222, Second limiting block; 2211, First limiting part; 2212, Second limiting part; 221s, Slot; 2221, Curved surface;
[0035] 23s, light-transmitting aperture; Detailed Implementation
[0036] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.
[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0038] To facilitate the reader's understanding of the design concept of this application, a brief description of the head-up display 10 is provided below. Please refer to [link / reference]. Figure 1 The head-up display 10 includes a housing 11 and an image generation unit 12 and a reflection module disposed within the housing 11. The image generation unit 12 generates raw image information, which may be driving information, navigation instructions, or other driving assistance content. This image information is projected onto the reflection module, which reflects it to form a projection beam S. This projection beam S is projected onto the windshield 200 and enters the driver's eye 300, forming a virtual image 400. This allows the driver to intuitively obtain the required information without looking down, improving driving safety.
[0039] The reflection module is the optical path adjustment unit of the head-up display 10. The optical path adjustment unit is used to define the direction of the projected beam S. The position and angle of the optical path adjustment unit affect the imaging position and sharpness of the virtual image 400. The reflection module includes at least one reflector. In this embodiment, the reflection module includes a first reflector 13 and a second reflector 14. The first reflector 13 and the second reflector 14 are the optical path adjustment units of the head-up display 10.
[0040] In some applications, the first reflector 13 is fixed, while the position of the second reflector 14 is adjustable. To ensure that people of different heights can see the virtual image 400 generated by the head-up display 10, the second reflector 14 needs to be rotated so that the projected beam S passes through the windshield 200 and enters the glasses 300, thus adjusting the height. Typically, the head-up display 10 is equipped with a drive unit (not shown, such as a stepper motor), which is connected to the second reflector 14. The drive unit drives the second reflector 14 to rotate, thereby changing the direction of the projected beam S. In a calibrated head-up display 10, the total rotation range of the second reflector 14 is fixed, ensuring not only the formation of the virtual image 400 but also meeting the field of vision needs of different drivers. If the head-up display 10 is not calibrated, the second reflector 14 may be in an incorrect position, and no matter how the position of the second reflector 14 is adjusted later, the glasses 300 will not be able to see the virtual image 400.
[0041] Therefore, calibrating the head-up display 10 is particularly important.
[0042] Please see Figure 2 This application provides a calibration system 100. Please refer to [link to relevant documentation]. Figure 2 The calibration system 100 includes a head-up display 10 and a calibration device 20 disposed on the head-up display 10. The calibration device 20 is used to calibrate the head-up display 10.
[0043] The head-up display 10 has a design optical axis o1. The design optical axis o1 of the head-up display 10 refers to the theoretical center line projected from the image generation unit 12 through the optical path adjustment unit (such as the first reflector 13 and the second reflector 14 mentioned above) in the internal optical path system of the head-up display 10. The design optical axis o1 is the core reference for calibrating the head-up display 10 and determines whether the final position of the projected virtual image 400 meets the design expectations.
[0044] Please see Figure 3 and combination Figure 2 This application provides a calibration device 20, including a housing 21, a limiting member 22, and at least two light-transmitting members 23. The housing 21 has a receiving cavity 21s and an entrance window 21a and an exit window 21b communicating with the receiving cavity 21s. The limiting member 22 is disposed on the housing 21 and is used to limit the head-up display 10. The setting of the limiting member 22 enables a reliable connection between the calibration device 20 and the head-up display 10. The light-transmitting members 23 are located in the receiving cavity 21s, and at least two light-transmitting members 23 are spaced apart. The light-transmitting members 23 are provided with light-transmitting holes 23s, and the light-transmitting holes 23s of the at least two light-transmitting members 23 are spaced apart along the design optical axis o1 of the head-up display 10. The entrance window 21a is used for the projection beam S of the head-up display 10 to enter, and the exit window 21b is used for the projection beam S to exit.
[0045] During the calibration of the head-up display 10, the projected beam S must sequentially pass through the light-transmitting holes 23s of at least two light-transmitting elements 23 to verify the alignment accuracy of the projected beam S with the designed optical axis o1. If the projected beam S deviates from the designed optical axis o1, the projected beam S cannot pass through the light-transmitting holes 23s of at least two light-transmitting elements 23 (e.g., Figure 4 As shown), at this point, it is necessary to adjust the position or angle of the internal optical path control element (e.g., the second reflector 14) of the head-up display 10 until the projected beam S coincides with the designed optical axis o1, and the projected beam S accurately passes through all the light-transmitting holes 23s along the designed optical axis o1 (e.g., Figure 2 As shown), the projected beam S can enter the eye 300 and be seen, thus completing the calibration of the head-up display 10.
[0046] The calibration device 20 provided in this application embodiment, when calibrating the head-up display 10, limits the head-up display 10 with the limiting member 22. The projected beam S projected by the optical path adjustment unit of the head-up display 10 enters the housing 21 through the incident window 21a. By adjusting the optical path adjustment unit of the head-up display 10 (e.g., the second reflector 14), when the projected beam S of the head-up display 10 coincides with the design optical axis o1 of the head-up display 10, the projected beam S of the head-up display 10 exits from the exit window 21b, thus achieving the calibration of the head-up display 10. This application achieves the calibration of the head-up display 10 by using the calibration device 20. The calibration of the head-up display 10 can be achieved simply by limiting the calibration device 20 to the head-up display 10, without requiring the head-up display 10 and the windshield 200 to be calibrated together. The calibration efficiency is high and the operation is simple. In addition, the calibration device 20 provided in this application does not require a complex stand to support the windshield 200, etc. The calibration device 20 provided in this application is small in size, easy to move, and conducive to flexible deployment in the calibration system 100.
[0047] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 3 and combination Figure 4 The limiting member 22 includes a first limiting block 221 and a second limiting block 222 that are independent of each other. The first limiting block 221 is used to limit the head-up display 10 to a first region 111, and the second limiting block 222 is used to limit the head-up display 10 to a second region 112. By cooperating with different regions of the head-up display 10, the first limiting block 221 and the second limiting block 222 improve the positioning accuracy and reliability between the calibration device 20 and the head-up display 10, thereby improving the accuracy of the head-up display 10 calibration. In practical applications, the first limiting block 221 and the second limiting block 222 can be adapted to the specific structure of the head-up display 10 to meet the positioning requirements of different models of head-up display 10.
[0048] The first region 111 and the second region 112 of the head-up display 10 can both be two different regions of the light-emitting end of the housing 11 of the head-up display 10. The first region 111 can be located at a corner of the housing 11, and the second region 112 can be located on the light-emitting surface of the housing 11 or at another corner, so as to realize the cooperative connection between the calibration device 20 and the head-up display 10.
[0049] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 3 and combination Figure 4The first limiting block 221 has a slot 221s, which is used to engage with the first area 111 of the head-up display 10. The slot 221s allows the first limiting block 221 to more securely engage with the first area 111 of the head-up display 10, thereby improving the stability and accuracy of positioning. The shape and size of the slot 221s can be customized according to the specific structure of the head-up display 10 to ensure reliable positioning during calibration for different models of head-up displays 10. The design of the slot 221s structure allows the first limiting block 221 to fit tightly against the first area 111 of the head-up display 10, preventing positioning deviation due to external force or vibration, thereby further improving the stability and accuracy of the calibration process.
[0050] It is understood that the housing 11 of the head-up display 10 has a snap-fit structure 1111 corresponding to the slot 221s. This snap-fit structure 1111 forms the aforementioned first region 111. The snap-fit structure 1111 can be embedded in the slot 221s, thereby achieving a stable positioning of the head-up display 10. Through the cooperation between the slot 221s and the snap-fit structure 1111, not only is the connection tightness between the calibration device 20 and the head-up display 10 improved, but the positioning accuracy is also further enhanced.
[0051] The snap-fit structure 1111 can be a protrusion or other structural form that can cooperate with the slot 221s, such as a buckle.
[0052] In some embodiments, please refer to Figure 3 and combination Figure 4 The first limiting block 221 includes a first limiting part 2211 and a second limiting part 2212, and the slot 221s is formed between the first limiting part 2211 and the second limiting part 2212. Through the arrangement of the first limiting part 2211 and the second limiting part 2212, a slot 221s for engaging with the head-up display 10 is formed between the first limiting part 2211 and the second limiting part 2212.
[0053] It is understandable that the specific form of the 221s card slot is not limited to that shown. Figure 4 The structure shown, consisting of the first limiting part 2211 and the second limiting part 2212, can also be other structures capable of achieving the snap-fit function.
[0054] In some embodiments, please refer to Figure 3 and combination Figure 4The second limiting block 222 has an arc surface 2221, which is used to adapt to the contour shape of the second region 112 of the head-up display 10. The arc surface 2221 in the second limiting block 222 allows it to fit more tightly against the second region 112 of the head-up display 10, thereby improving the accuracy and stability of the limiting action. The arc surface 2221 adapts to the curvature changes of the head-up display 10 surface, ensuring good contact between the device and the head-up display 10 during calibration, reducing calibration errors caused by poor contact or structural mismatch.
[0055] It is understandable that the arc surface 2221 of the second limiting block 222 is set to adapt to the second area 112 of the head-up display 10. The second area 112 of the head-up display 10 is set with a curved surface structure 1121 that matches the arc surface 2221. Through the setting of the arc surface 2221 of the second limiting block 222, it can fit tightly with the curved surface structure 1121 set in the second area 112 of the head-up display 10, thereby achieving stable positioning of the head-up display 10.
[0056] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 3 and combination Figure 4 The housing 21 includes a first portion 211 and a second portion 212. A receiving cavity 21s is formed inside the housing 21, at least a portion of which is located between the first portion 211 and the second portion 212. A light-transmitting element 23 is disposed between the first portion 211 and the second portion 212. A first limiting block 221 is disposed at one end of the first portion 211, and a second limiting block 222 is disposed at one end of the second portion 212. An incident window 21a is formed between the first limiting block 221 and the second limiting block 222. An exit window 21b is formed between the other end of the first portion 211 and the other end of the second portion 212. This arrangement enables the housing 21 to support at least two light-transmitting elements 23. Furthermore, the spacing between the first portion 211 and the second portion 212 can be adjusted according to the size of the light-transmitting elements 23 to accommodate the calibration requirements of different specifications of the head-up display 10, thereby improving the versatility and adaptability of the calibration equipment.
[0057] It is worth noting that the function of the housing 21 is to provide reliable support and protection for the various components in the calibration device 20, and to shield the external ambient light to prevent it from affecting the calibration. The specific structural form of the housing 21 can be adjusted according to actual needs. For example, the housing 21 includes two independent first parts 211 and second parts 212, which are spaced apart and support the light-transmitting element 23. The area between the two independent first parts 211 and second parts 212 forms the receiving cavity 21s of the housing 21. Alternatively, the housing 21 can be a cylinder with the aforementioned spaced first parts 211 and second parts 212. In this case, the first parts 211 and second parts 212 can be the sidewalls of the cylinder used to support two opposing areas of the light-transmitting element 23. Alternatively, the housing 21 can also be a structure of other shapes, such as a prism or other irregular shapes, as long as it can meet the space requirements for supporting the light-transmitting element 23 and the receiving cavity 21s.
[0058] It is worth noting that the first part 211 and the second part 212 can be arranged in parallel, and the extension direction of the first part 211 and the second part 212 coincides with the direction of the design optical axis o1 of the head-up display 10. At least two light-transmitting elements 23 can be arranged sequentially along the extension direction of the first part 211 and the second part 212, so that the light-transmitting holes 23s of the at least two light-transmitting elements 23 are spaced apart along the design optical axis o1 of the head-up display 10.
[0059] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 5 The calibration device 20 also includes a camera 24, which is positioned near the exit window 21b and along the design optical axis o1 of the head-up display 10. The lens of the camera 24 is positioned corresponding to the light-transmitting aperture 23s. Through this configuration, the camera 24 can capture / record images / videos in real time through the light-transmitting aperture 23s, such as... Figure 6 As shown, when the projection beam S of the head-up display 10 does not coincide with the design optical axis o1 of the head-up display 10, the camera 24 cannot capture the image information in the projection beam S. At this time, the optical path adjustment unit of the head-up display (e.g., the second reflector 14) is adjusted until the projection beam S of the head-up display 10 coincides with the design optical axis o1 of the head-up display 10 (e.g., ...). Figure 7 As shown, camera 24 can accurately capture image information in the projected beam S, thereby calibrating the head-up display 10. Through the settings of camera 24, the images / videos captured by camera 24 are used as a detection standard to determine whether the projected beam S of the head-up display 10 is consistent with the designed optical axis o1, thus improving the convenience and accuracy of calibrating the head-up display 10.
[0060] The camera 24 can be installed independently of the housing 21 of the calibration device 20, or it can be installed within the housing 21 of the calibration device 20. For example, in some embodiments, the calibration device 20 further includes a support member 25, which is disposed on the housing 21, and the camera 24 is mounted on the support member 25. The support member 25 provides a stable mounting base for the camera 24, thereby ensuring the positional stability and accuracy of the camera 24 during the calibration process, and further improving the accuracy and reliability of calibrating the head-up display 10.
[0061] It is worth noting that in some embodiments, please refer to [link / reference]. Figure 2 The radius of the light-transmitting hole 23s is R. There are two light-transmitting elements 23, each with one light-transmitting hole 23s. The total number of light-transmitting holes 23s is two. Along the design optical axis o1 of the head-up display 10, the distance between the two light-transmitting holes 23s is L, and arctan(R / L) < 0.3°. Wherein, arctan(R / L) is in... Figure 2 The angle α is defined as the included angle. By defining the geometric relationship between the radius of the two light-transmitting holes 23s and the distance between them, the calibration device can more sensitively detect the offset of the optical axis of the head-up display 10, ensuring that the projected beam S can pass completely through both light-transmitting holes 23s only when it is aligned with the designed optical axis o1. This setting ensures that the projected beam S of the head-up display 10 has a high alignment accuracy requirement when passing through the light-transmitting holes 23s, thereby further improving the accuracy of the calibration.
[0062] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A calibration device, characterized in that, include: Housing, limiting element, and at least two light-transmitting elements; The housing has a receiving cavity and an entrance window and an exit window communicating with the receiving cavity; The limiting member is disposed on the housing, and the limiting member is used to limit the head-up display; The light-transmitting element is located in the receiving cavity, and at least two light-transmitting elements are spaced apart; the light-transmitting element is provided with a light-transmitting hole, and the light-transmitting holes of at least two light-transmitting elements are spaced apart along the design optical axis of the head-up display; The incident window is used for the projection beam of the head-up display to enter, and the exit window is used for the projection beam to exit.
2. The calibration device according to claim 1, characterized in that, The limiting component includes a first limiting block and a second limiting block that are independent of each other. The first limiting block is used to limit the position of the device to a first area of the head-up display, and the second limiting block is used to limit the position of the device to a second area of the head-up display.
3. The calibration device according to claim 2, characterized in that, The first limiting block has a slot, which is used to engage the first area of the head-up display.
4. The calibration device according to claim 3, characterized in that, The first limiting block includes a first limiting part and a second limiting part, and the slot is formed between the first limiting part and the second limiting part.
5. The calibration device according to claim 2, characterized in that, The second limiting block has an arc surface, which is used to adapt to the contour shape of the second area of the head-up display.
6. The calibration device according to claim 2, characterized in that, The housing has a first part and a second part that are spaced apart; The light-transmitting element is disposed between the first part and the second part; The first limiting block is disposed at one end of the first part, and the second limiting block is disposed at one end of the second part; The incident window is formed between the first limiting block and the second limiting block; The emission window is formed between the other end of the first part and the other end of the second part.
7. The calibration device according to any one of claims 1-6, characterized in that, The calibration device also includes a camera, which is positioned close to the output window and along the design optical axis of the head-up display, with the camera lens positioned corresponding to the light-transmitting hole.
8. The calibration device according to claim 7, characterized in that, The calibration device also includes a support member disposed on the housing, and the camera is mounted on the support member.
9. The calibration device according to any one of claims 1-6, characterized in that, The radius of the light-transmitting hole is R, the number of light-transmitting elements is two, and the distance between the two light-transmitting holes along the design optical axis of the head-up display is L, arctan(R / L) < 0.3°.
10. A calibration system, characterized in that, It includes a head-up display and a calibration device as described in any one of claims 1-9; the head-up display has a design optical axis; the limiting member is positioned within the head-up display.