CN113777786B - Vehicle-mounted head-up display optical system - Google Patents
Vehicle-mounted head-up display optical system Download PDFInfo
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- CN113777786B CN113777786B CN202111020802.5A CN202111020802A CN113777786B CN 113777786 B CN113777786 B CN 113777786B CN 202111020802 A CN202111020802 A CN 202111020802A CN 113777786 B CN113777786 B CN 113777786B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
The embodiment of the disclosure provides an optical system for vehicle head-up display, comprising: a lens section and a screen emitting unit section, the light emitted by the screen emitting unit section being presented on a predetermined display carrier through the lens section; the lens part at least comprises two lens groups, the screen transmitting unit part at least comprises two screen transmitting units, and each screen transmitting unit corresponds to one lens group; the field of view area corresponding to the at least one screen emitting unit is the central field of view area of the user. According to the embodiment of the disclosure, the plurality of screen emitting units and the plurality of lens groups are arranged, each pair of lens groups and each pair of screen emitting unit can form a field of view area, the range of the field of view area which can be observed by a driver is further increased, the field of view angle is increased, different contents can be displayed in different fields of view respectively, driving of the driver is not hindered, more information can be presented for the driver, the systematicness is good, and the user experience is high.
Description
Technical Field
The disclosure relates to the field of optics, and in particular relates to an optical system for vehicle head-up display.
Background
The HUD (Head-up Display), i.e. Head-up Display or Head-up Display, can project information such as current driving information and the like on a certain distance in front through a windshield, such as interactive information such as vehicle speed, rotating speed, endurance, tire pressure, navigation, multimedia and the like. In the driving process, a driver does not need to look at a traditional instrument desk or a vehicle machine at low head, and driving information can be obtained through front projection images. Therefore, the driver can always pay attention to the road in front, so that accidents caused by low head to look at the instrument in the driving process can be avoided, and the driving safety is greatly improved.
HUD projects important information on a transparent reflective curved surface by using the principle of optical reflection, and this surface may be a windshield or a reflective surface of a rear-mounted windshield. The projected characters and images are adjusted on the distance of infinite focal length, so that when a driver looks forward through the HUD, the external scene can be easily fused with the data displayed by the HUD.
At present, conventional vehicle-mounted HUD systems can be divided into C type and W type, but the field angles are smaller, or the content displayed in the field range which can be watched by a driver is more, so that the vehicle-mounted HUD system is unfavorable for the driving of the user, or the content displayed is less, so that the vehicle-mounted HUD system is unfavorable for the watching of the driver, and the physical examination of the user is poorer.
Disclosure of Invention
In view of this, the embodiment of the present disclosure provides an optical system for vehicle head-up display, which is used for solving the following problems in the prior art: the conventional vehicle-mounted HUD system can be divided into a C type and a W type, but the angles of view of the vehicle-mounted HUD system are smaller, or the content displayed in the visual field range viewable by a driver is more, so that the vehicle-mounted HUD system is unfavorable for the driving of a user, or the content displayed in the visual field range is less, so that the vehicle-mounted HUD system is unfavorable for the viewing of the driver, and the physical examination of the user is poorer.
In one aspect, an embodiment of the present disclosure provides an optical system for vehicle head-up display, including: a lens section and a screen emitting unit section through which light emitted by the screen emitting unit section is presented on a predetermined display carrier; the screen transmitting unit part at least comprises two screen transmitting units, and each screen transmitting unit corresponds to one lens group; the field of view area corresponding to the at least one screen emitting unit is the central field of view area of the user.
In some embodiments, adjacent lens groups are arranged to have overlapping areas, so that the field areas corresponding to the screen emitting unit portions are all continuous field areas.
In some embodiments, the lens portion comprises: a first lens group, a second lens group, and a third lens group; the screen transmitting unit section includes: the device comprises a first screen transmitting unit, a second screen transmitting unit and a third screen transmitting unit; the second screen emission unit is positioned between the first screen emission unit and the third screen emission unit, the first screen emission unit and the second screen emission unit are arranged at a first preset angle, and the third screen emission unit and the second screen emission unit are arranged at a second preset angle, so that the section of the formed lens part has preset curvature; and the field area corresponding to the second screen transmitting unit is the central field area.
In some embodiments, the number of lenses in the first lens group and the third lens group is greater than the number of lenses in the second lens group.
In some embodiments, the materials of the lens group in the lens portion include: glass, and/or resin.
In some embodiments, the lens group in the lens portion has a surface shape including at least one of: spherical, diffractive, aspheric, free-form surfaces.
In some embodiments, the predetermined display carrier is a curved mirror.
In some embodiments, the lens portion is at a pitch angle of 7 degrees to 11 degrees relative to a plane of curvature of the predetermined display carrier.
In some embodiments, the transmittance of the curved mirror is between 10% and 80%.
In some embodiments, the curved mirror has a shape of at least one of: spherical, aspherical, free-form surface.
According to the embodiment of the disclosure, the plurality of screen emitting units and the plurality of lens groups are arranged, each pair of lens groups and each pair of screen emitting unit can form a field of view area, the range of the field of view area which can be observed by a driver is further increased, the field of view angle is increased, different contents can be displayed in different fields of view respectively, driving of the driver is not hindered, more information can be presented for the driver, the systematicness is good, and the user experience is high.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of an optical system for vehicle head-up display according to an embodiment of the disclosure;
fig. 2 is a schematic structural diagram of a vehicle-mounted head-up display optical system according to an embodiment of the present disclosure;
fig. 3 is a schematic working diagram of an optical system for vehicle head-up display according to an embodiment of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed description of known functions and known components.
The embodiment of the disclosure provides an optical system for vehicle head-up display, the structure of which is schematically shown in fig. 1, comprising:
a lens section 1 and a screen emitting unit section 2, the light emitted by the screen emitting unit section 2 being presented on a predetermined display carrier 3 through the lens section 1; wherein the lens part 1 comprises at least two lens groups, the screen transmitting unit part 2 comprises at least two screen transmitting units, and each screen transmitting unit corresponds to one lens group; the field of view area corresponding to the at least one screen emitting unit is the central field of view area of the user.
The schematic structural diagram of fig. 1 only shows a case where the screen emitting unit part includes two screen emitting units, and in a specific implementation, three, four, etc. may be used, which is not limited herein.
In fig. 1, a certain overlapping area exists between two lens groups corresponding to two screen emitting units, so that a field area observed by a driver is continuous.
In particular, if the screen emitting units are more, the corresponding lens groups are more, so that it is preferable to set an overlapping area between the adjacent lens groups, so that the field areas corresponding to the screen emitting units are continuous field areas, and better user experience is obtained. Of course, the manner of the continuous field of view area given in fig. 1 is only an example, and those skilled in the art can set adjacent lenses without overlapping areas when actually setting the same, so as to meet different actual scene requirements, which are all within the scope of the disclosure.
According to the embodiment of the disclosure, the plurality of screen emitting units and the plurality of lens groups are arranged, each pair of lens groups and each pair of screen emitting unit can form a field of view area, the range of the field of view area which can be observed by a driver is further increased, the field of view angle is increased, different contents can be displayed in different fields of view respectively, driving of the driver is not hindered, more information can be presented for the driver, the systematicness is good, and the user experience is high.
In a preferred embodiment, the screen emitting unit part includes three screen emitting units, the lens part also corresponds to three lens groups, and the structure thereof is schematically shown in fig. 2, namely, the lens part 1 includes a first lens group 11, a second lens group 12 and a third lens group 13, and the screen emitting unit part 2 includes a first screen emitting unit 21, a second screen emitting unit 22 and a third screen emitting unit 23; the second screen emitting unit 22 is located between the first screen emitting unit 21 and the third screen emitting unit 23, the first screen emitting unit 21 is disposed at a first predetermined angle with the second screen emitting unit 22, and the third screen emitting unit 23 is disposed at a second predetermined angle with the second screen emitting unit 22 so that a cross section of the formed lens part has a predetermined curvature; the field area corresponding to the second screen transmitting unit is a central field area.
The vehicle-mounted HUD firstly needs to meet the requirement of real-world road surface observation, so that in a central view field, less simpler virtual content superposition is needed, such as simple arrows, and the display quality is not required to be pursued too high, so that the design and manufacturing difficulty is reduced; and interactive information such as vehicle speed, navigation, multimedia and the like can be placed in the edge view field, so that the requirements of driver safety and information integrity in the actual driving environment are met better. Based on the above consideration, when the optical system for vehicle-mounted head-up display in the embodiment of the disclosure is specifically set, the number of lenses in the first lens group and the third lens group may be greater than the number of lenses in the second lens group, so that the center view field is ensured to have low-resolution display, and meanwhile, high-resolution display is presented in other view fields.
In order to exhibit a good display effect, the predetermined display carrier is preferably a curved mirror.
In particular, as shown in fig. 3, the light emitted by the first screen emission unit 11 passes through the first lens group 21 and reaches the curved mirror 3, so that a virtual image with a viewing angle of FOV1 is formed and finally enters the human eye, and as the number of lenses in the first lens group 21 is large, the MTF of the image is high, and clear display of digital content can be realized; the light rays emitted by the second screen emission unit 12 pass through the second lens group 22 and reach the curved surface reflector 3, and the virtual image with the visual angle of FOV2 finally enters human eyes, and as the number of lenses in the second lens group 22 is smaller, the MTF of the image is lower, so that the clear display of larger arrow content can be realized; the light rays emitted from the third screen emission unit 13 pass through the third lens group 23 and reach the curved surface reflecting mirror 3, and finally the virtual image with the visual angle of FOV3 is incident to human eyes, and the number of lenses in the third lens group 23 is large, so that the MTF of the image is high, and clear display of digital and symbol contents can be realized. FOV1, FOV2, FOV3 splice when entering human eye, realize the expansion of FOV, realize segmentation MTF demonstration simultaneously.
The above screen emitting unit includes at least one of the following types: micro OLED (Micro organic light emitting semiconductor), TFT-LCD (thin film transistor liquid crystal display), DLP (digital optical processing) or LCOS (liquid crystal on silicon).
The material of the lens group in the lens portion may be glass, resin, or a combination of both. The material of the curved mirror may also be glass, plastic or a combination of both, preferably transparent glass and transparent plastic. In order to adapt to different application scenes, the transmittance of the curved reflector can be adjusted at will between 10% and 80%.
The surface shape of the lens group in the lens part at least comprises one of the following: spherical, diffractive, aspheric, free-form surfaces; for a curved mirror, its surface shape includes at least one of: spherical, aspherical, free-form surface. Further, the first lens group 21 and the third lens group 23 may take 2-piece type, each surface being spherical; the second lens group 22 has a 1-piece shape, and a spherical surface.
For a lens group, its surface shape satisfies the following equation:
where c is the radius of curvature, k is the conic coefficient, and r is the half aperture of the lens.
For the surface of a curved mirror, the surface shape of which is an extended polynomial (Extended Polynomial) satisfies the following equation:
where c is the radius of curvature, k is the conic coefficient, r is the half aperture of the lens, ai is the coefficient used by the expansion polynomial.
In a preferred embodiment, the distance between the screen emitting unit and the lens group and the curved mirror can be any distance from 400mm to 1000mm so as to adapt to the requirements of different vehicle types.
Optionally, the relative angle of the display screen unit and the lens group unit relative to the curved reflector can be any value between 7 degrees and 11 degrees, so that drivers of different vehicle types and different heights can be satisfied.
Furthermore, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across schemes), adaptations or alterations based on the present disclosure. The elements in the claims are to be construed broadly based on the language employed in the claims and are not limited to examples described in the present specification or during the practice of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above detailed description, various features may be grouped together to streamline the disclosure. This is not to be interpreted as an intention that the disclosed features not being claimed are essential to any claim. Rather, the disclosed subject matter may include less than all of the features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the disclosure should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
While various embodiments of the present disclosure have been described in detail, the present disclosure is not limited to these specific embodiments, and various modifications and embodiments can be made by those skilled in the art on the basis of the concepts of the present disclosure, and these modifications and modifications should be within the scope of the present disclosure as claimed.
Claims (8)
1. An optical system for vehicle head-up display, comprising:
a lens section and a screen emitting unit section through which light emitted by the screen emitting unit section is presented on a predetermined display carrier;
the screen transmitting unit part at least comprises two screen transmitting units, and each screen transmitting unit corresponds to one lens group; the field area corresponding to the at least one screen transmitting unit is a central field area of view of the user; each pair of lens groups and the screen transmitting unit form a view field area, and different contents are displayed in different view field areas respectively;
the lens section includes: a first lens group, a second lens group, a third lens group, the number of lenses in the first lens group and the third lens group being greater than the number of lenses in the second lens group;
the screen transmitting unit section includes: the device comprises a first screen transmitting unit, a second screen transmitting unit and a third screen transmitting unit;
the second screen emission unit is positioned between the first screen emission unit and the third screen emission unit, the first screen emission unit and the second screen emission unit are arranged at a first preset angle, and the third screen emission unit and the second screen emission unit are arranged at a second preset angle, so that the section of the formed lens part has preset curvature; and the field area corresponding to the second screen transmitting unit is the central field area.
2. The on-board heads-up display optical system as claimed in claim 1 wherein,
the adjacent lens groups are arranged to have an overlapping area, so that the field areas corresponding to the screen emitting unit parts are all continuous field areas.
3. The optical system for vehicle head-up display of claim 1, wherein the material of the lens group in the lens portion comprises: glass, and/or resin.
4. The optical system for vehicle head-up display according to claim 1, wherein the surface shape of the lens group in the lens portion includes at least one of: spherical, diffractive, aspheric, free-form surfaces.
5. The vehicle head-up display optical system of any one of claims 1 to 4, wherein the predetermined display carrier is a curved mirror.
6. The vehicle head-up display optical system of claim 5, wherein the lens portion is at a pitch angle of 7 degrees to 11 degrees with respect to a plane of curvature of the predetermined display carrier.
7. The vehicle head up display optical system of claim 5, wherein the curved mirror has a transmittance of between 10% and 80%.
8. The vehicle head up display optical system of claim 5, wherein the curved mirror has a surface shape comprising at least one of: spherical, aspherical, free-form surface.
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| CN202111020802.5A CN113777786B (en) | 2021-09-01 | 2021-09-01 | Vehicle-mounted head-up display optical system |
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| CN202111020802.5A CN113777786B (en) | 2021-09-01 | 2021-09-01 | Vehicle-mounted head-up display optical system |
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| CN113777786B true CN113777786B (en) | 2023-09-26 |
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