CN211426938U - Imaging system with variable focal length and head-up display - Google Patents
Imaging system with variable focal length and head-up display Download PDFInfo
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- CN211426938U CN211426938U CN201922421512.6U CN201922421512U CN211426938U CN 211426938 U CN211426938 U CN 211426938U CN 201922421512 U CN201922421512 U CN 201922421512U CN 211426938 U CN211426938 U CN 211426938U
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Abstract
The application discloses an imaging system with variable focal length and a head-up display. The imaging system with variable focal length comprises an image generation unit (1) for generating light rays and transmitting the light rays to a variable focal length lens; a variable focus lens (2) for adjusting the focal power of the light rays; a mirror group (3) comprising: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens; the adjusting motor (4) is used for adjusting the focal power of the variable-focus lens and the distance between the variable-focus lens and the reflector group; the distance between the variable-focus lens and the image generation unit is adjusted through an adjusting motor, and the distance between the image generation unit and the variable-focus lens is adjusted to compensate the imaging quality while the focal power of the variable-focus lens is changed through adjusting an electric signal. The technical problem that the head-up display system cannot be focused and switched is solved.
Description
Technical Field
The application relates to the field of communication, in particular to a variable focal length imaging system and a head-up display.
Background
The distance between the virtual image surface in the head-up display system and a driver is fixed, and when the driver drives under different road conditions, the distance focused by eyes can be changed at any time.
The inventor finds that the driver needs to continuously switch the focusing between the actual scene and the virtual image surface of the head-up display system, so that the discomfort and fatigue of eyes are easily caused, and the driving safety is influenced.
Aiming at the problem that the head-up display system in the related art can not carry out focusing switching, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The present disclosure provides a variable focal length imaging system and a head-up display, so as to solve the problem that the head-up display system cannot perform focus switching.
To achieve the above object, according to one aspect of the present application, there is provided a variable focal length imaging system.
A variable focus imaging system according to the present application comprises: an image generation unit for generating light and transmitting the light to the variable focus lens; a variable focus lens for adjusting the focal power of the light; a mirror group comprising: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens; the adjusting motor is used for adjusting the focal power of the variable-focus lens and the distances between the variable-focus lens and the reflector set; the distance between the variable-focus lens and the image generation unit is adjusted through an adjusting motor, and the distance between the image generation unit and the variable-focus lens is adjusted to compensate the imaging quality while the focal power of the variable-focus lens is changed through adjusting an electric signal.
Optionally, the variable focus lens is a liquid lens.
Optionally, the adjustment motor comprises: a motor.
Optionally, the image generation unit comprises: laser scanning projection device.
Optionally, light passing through the reflector group is reflected by the automobile windshield to form an image.
Optionally, the power of the variable focus lens is varied by varying the voltage across the variable focus lens by adjusting an electrical signal.
Optionally, the power of the variable focus lens is varied by varying the current through the variable focus lens by adjusting an electrical signal.
In order to achieve the above object, according to another aspect of the present application, there is provided a head up display including: the imaging system is used for AR-HUD.
In order to achieve the above object, according to another aspect of the present application, there is provided a head up display including: the imaging system is used for the windshield type HUD.
In order to achieve the above object, according to another aspect of the present application, there is provided a head up display including: the imaging system is used for combined HUD.
In the imaging system and the head-up display with variable focal length in the embodiment of the application, an image generation unit is adopted and used for generating light rays and transmitting the light rays to the variable focal length lens; a variable focus lens for adjusting the focal power of the light; a mirror group comprising: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens; the adjusting motor is used for adjusting the focal power of the zoom lens and the distance between the zoom lens and the reflector set, the distance between the zoom lens and the image generating unit is adjusted through the adjusting motor, the focal power of the zoom lens is changed through adjusting an electric signal, the distance between the image generating unit and the zoom lens is adjusted at the same time, imaging quality is compensated, and the purpose of focusing switching is achieved, so that the technical effect of changing the distance of an imaging plane of an imaging system in real time to match the focusing distance of a driver under different driving conditions is achieved, and the technical problem that the head-up display system cannot perform focusing switching is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic diagram of a light refraction path of a liquid lens when no voltage is applied;
FIG. 2 is a schematic diagram of a light refraction path of a liquid lens under an applied voltage;
FIG. 3 is a schematic diagram of an optical path of a heads-up display according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a variable focus imaging system according to an embodiment of the present application;
fig. 5 is a schematic physical structure diagram of an imaging system with variable focal length according to an embodiment of the application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 4 and 5, the variable focal length imaging system according to the embodiment of the present application includes: an image generation unit 1 for generating light rays and emitting the light rays to the variable focus lens; a variable focal length lens 2 for adjusting the focal power of the light; the mirror group 3 includes: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens; the adjusting motor 4 is used for adjusting the focal power of the variable-focus lens and the distance between the variable-focus lens and the reflector group; the distance between the variable-focus lens and the image generation unit is adjusted through an adjusting motor, and the distance between the image generation unit and the variable-focus lens is adjusted to compensate the imaging quality while the focal power of the variable-focus lens is changed through adjusting an electric signal.
Specifically, adopt variable focal lens 2 cooperation adjusting motor 4 changes the distance of imaging system's virtual image face in real time to match driver's focus distance under the different driving circumstances, improve the degree of depth and frequent degree that driver's eyes focus switches, alleviate eyestrain, improve driving safety. The distance between the zoom lens and the image generation unit is adjusted through the adjusting motor, and is changed through adjusting the electrical signal the adjustment when the focal power of the zoom lens the image generation unit with distance between the zoom lens compensates imaging quality, and imaging system's virtual image plane takes place the back-and-forth movement thereupon, and can clear formation of image always to reduce frequent degree and the switching depth that driver's eye focus switched, slow down eye fatigue, improve and drive safety.
Referring to fig. 3 and 4, the working principle of real-time adjustment of the focal length of the HUD is well known to those skilled in the art, and is further explained in the embodiments of the present application.
Firstly, the fixation point information of the driver can be obtained through a monocular or binocular vehicle-mounted camera, the distance of the fixation point of the driver is calculated by a built-in known recognition algorithm, and the voltage applied to the variable-focus lens 2 such as a liquid lens is adjusted according to the obtained distance information, so that the display image of the imaging system is positioned at the distance of the fixation point of the driver. So, HUD projection picture information can be seen clearly to driver's eyeball need not focusing, reduces driver's reaction time, improves driving safety. When the above process takes a short time (usually in the order of tens of milliseconds), i.e. the refresh rate per second can reach above 24Hz, the real-time zooming function of the HUD can be realized. It should be noted that, the identification algorithm and device for detecting the gaze point of human eyes are already implemented at present, and the distance can be calculated by the gaze point and can also be obtained by simple calculation, which is not described herein again.
As can be seen from fig. 1 and 2, the relationship between the change in focal length and the applied voltage for the variable focus lens 2, i.e., the liquid crystal lens, can be calibrated in advance. Therefore, how to use the function of zooming realized by the imaging system in the HUD is realized by a relationship curve between the gaze point distance and the applied voltage set in advance. Distance information is obtained through driver's fixation point detection equipment, and then corresponding voltage is directly applied to the liquid lens according to the information, namely zooming can be completed through the originally stored curve relation between the distance and the voltage.
From the above description, it can be seen that the following technical effects are achieved by the present application:
in the embodiment of the application, an image generation unit is adopted and used for generating light rays and transmitting the light rays to the variable-focus lens; a variable focus lens for adjusting the focal power of the light; a mirror group comprising: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens; the adjusting motor is used for adjusting the focal power of the zoom lens and the distance between the zoom lens and the reflector set, the distance between the zoom lens and the image generating unit is adjusted through the adjusting motor, the focal power of the zoom lens is changed through adjusting an electric signal, the distance between the image generating unit and the zoom lens is adjusted at the same time, imaging quality is compensated, and the purpose of focusing switching is achieved, so that the technical effect of changing the distance of an imaging plane of an imaging system in real time to match the focusing distance of a driver under different driving conditions is achieved, and the technical problem that the head-up display system cannot perform focusing switching is solved.
In this embodiment, a liquid lens is preferably used as the variable focus lens.
The liquid lens in the embodiments of the present application can be classified into a liquid-filled lens, a lens that changes the curvature of a surface to change the focal length by filling and sucking liquid, and a mechanical device that applies pressure to liquid in a cavity to redistribute the liquid in the cavity and change the radius of curvature. The other is an electrowetting effect lens, which is a liquid lens in which the wetting characteristics of a liquid on a solid surface are controlled by varying the applied voltage. As shown in fig. 1 and 2, the refraction of light by the liquid lens changes under different applied voltages, that is, the liquid lens has different optical powers under different applied voltages.
The power of the variable focus lens is preferably varied by varying the voltage across the variable focus lens 2 by adjusting the electrical signal.
The power of the variable focus lens is preferably varied by varying the current through the variable focus lens 2 by adjusting the electrical signal.
As a preference in the present embodiment, the adjustment motor includes: a motor. The distance adjustment between the variable focus lens and the image generation unit is realized by driving with a motor.
As a preference in the present embodiment, the image generation unit PGU includes: laser scanning projection device. LCD, LCOS, DLP, Mini LED, OLED, AMOLED, etc. may be selected, and are not particularly limited in the embodiments of the present application.
As a preference in the present embodiment, as shown in fig. 3 and 5, the light passing through the mirror group 3 is reflected by a windshield of an automobile to be imaged, and specifically, includes: the first reflector 31 and the second reflector 32 are two free-form surface reflectors, and finally reflected by the automobile windshield 4 to form an image.
As shown in fig. 3, the variable focus lens 2 may be a liquid lens. In the HUD imaging optical path, the free- form surface mirror 32 or 31 provides most of the optical power of the system, and the variable focus lens 2 provides the remaining part of the optical power. The imaging unit PGU passes through the variable focus lens 2, the free-form surface mirror 31, and the free-form surface mirror 32, and is finally reflected by the windshield glass to the cell region 5.
As is preferable in the present embodiment, the variable focal length imaging system is used for AR-HUD. The heads-up display is an AR-HUD augmented reality heads-up display. By adopting the zoom lens 2, the focal length of the AR-HUD imaging system and the relative position of the image generation unit 1 are changed in real time, the AR-HUD virtual image surface moves back and forth and can be imaged clearly all the time, so that the frequency degree and the switching depth of eye focusing switching of a driver are reduced, the eye fatigue is reduced, and the driving safety is improved.
As a preference in the present embodiment, the variable focal length imaging system is used for a combination-type HUD or a windshield-type HUD. The head-up display is a windshield type HUD is a windshield type head-up display, and the combination type HUD (not shown) is a combination type head-up display. Through adopting lens 2 that can zoom, change windshield type HUD or combined HUD in real time imaging system's focus and image generation unit 1 relative position, the virtual image face in windshield type HUD or combined HUD takes place the back-and-forth movement thereupon, and can clear formation of image always to reduce frequent degree and the switching depth that driver's eyes focus switched, slow down eye fatigue, improve and drive safety.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A variable focus imaging system, comprising:
an image generation unit (1) for generating light rays and emitting them to the variable focus lens;
a variable focus lens (2) for adjusting the focal power of the light rays;
a mirror group (3) comprising: at least two free-form surface reflectors for receiving light rays incoming through the variable focus lens;
the adjusting motor (4) is used for adjusting the focal power of the variable-focus lens and the distance between the variable-focus lens and the reflector group;
the distance between the variable-focus lens and the image generation unit is adjusted through an adjusting motor, and the distance between the image generation unit and the variable-focus lens is adjusted to compensate the imaging quality while the focal power of the variable-focus lens is changed through adjusting an electric signal.
2. The imaging system of claim 1, wherein the variable focus lens is a liquid lens.
3. The imaging system of claim 1, wherein the adjustment motor comprises: a motor.
4. The imaging system of claim 1, wherein the image generation unit comprises: laser scanning projection device.
5. The imaging system of claim 1, wherein light passing through the set of reflectors is reflected from a windshield of the vehicle for imaging.
6. The imaging system of claim 1, wherein the power of the variable focus lens is varied by varying the voltage across the variable focus lens by adjusting an electrical signal.
7. The imaging system of claim 1, wherein the power of the variable focus lens is varied by varying the current through the variable focus lens by adjusting an electrical signal.
8. A heads-up display, comprising: the imaging system of any of claims 1 to 7, for use in an AR-HUD.
9. A heads-up display, comprising: the imaging system of any of claims 1 to 7, for a windshield HUD.
10. A heads-up display, comprising: the imaging system of any of claims 1 to 7, for use in a combined HUD.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922421512.6U CN211426938U (en) | 2019-12-27 | 2019-12-27 | Imaging system with variable focal length and head-up display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922421512.6U CN211426938U (en) | 2019-12-27 | 2019-12-27 | Imaging system with variable focal length and head-up display |
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| CN211426938U true CN211426938U (en) | 2020-09-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345076A (en) * | 2020-09-16 | 2021-02-09 | 北京卓立汉光仪器有限公司 | Spectrum-taking system capable of adjusting resolution ratio and spectrum-taking machine |
| CN112445014A (en) * | 2020-12-08 | 2021-03-05 | 厦门天马微电子有限公司 | Display module and display device |
| CN112578569A (en) * | 2020-12-28 | 2021-03-30 | 广景视睿科技（深圳）有限公司 | Projection optical system and head-up display device of automobile |
| CN113534440A (en) * | 2021-07-13 | 2021-10-22 | 维沃移动通信有限公司 | Screen structure, electronic device and focusing method |
| CN116068568A (en) * | 2023-04-07 | 2023-05-05 | 天津宜科自动化股份有限公司 | Data processing system for obtaining object distance |
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2019
- 2019-12-27 CN CN201922421512.6U patent/CN211426938U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345076A (en) * | 2020-09-16 | 2021-02-09 | 北京卓立汉光仪器有限公司 | Spectrum-taking system capable of adjusting resolution ratio and spectrum-taking machine |
| CN112445014A (en) * | 2020-12-08 | 2021-03-05 | 厦门天马微电子有限公司 | Display module and display device |
| CN112445014B (en) * | 2020-12-08 | 2022-07-01 | 厦门天马微电子有限公司 | Display module and display device |
| CN112578569A (en) * | 2020-12-28 | 2021-03-30 | 广景视睿科技（深圳）有限公司 | Projection optical system and head-up display device of automobile |
| CN113534440A (en) * | 2021-07-13 | 2021-10-22 | 维沃移动通信有限公司 | Screen structure, electronic device and focusing method |
| CN116068568A (en) * | 2023-04-07 | 2023-05-05 | 天津宜科自动化股份有限公司 | Data processing system for obtaining object distance |
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Address after: 215000 4th floor, building 14, Tengfei Innovation Park, 388 Xinping street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Suzhou turnip Electronic Technology Co.,Ltd. Address before: 215123 4th floor, building 14, Tengfei Innovation Park, 388 Xinping street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: SUZHOU CARROBOT AUTOMOTIVE ELECTRONICS TECHNOLOGY Co.,Ltd. |
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