CN117148576A - Zoom projection device and control method thereof - Google Patents

Zoom projection device and control method thereof Download PDF

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Publication number
CN117148576A
CN117148576A CN202310956346.8A CN202310956346A CN117148576A CN 117148576 A CN117148576 A CN 117148576A CN 202310956346 A CN202310956346 A CN 202310956346A CN 117148576 A CN117148576 A CN 117148576A
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CN
China
Prior art keywords
image source
image
reflecting
projection device
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310956346.8A
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Chinese (zh)
Inventor
黄磊
孙飞杨
但松松
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Lianchuang Electronic Technology Co ltd
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Lianchuang Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lianchuang Electronic Technology Co ltd filed Critical Lianchuang Electronic Technology Co ltd
Priority to CN202310956346.8A priority Critical patent/CN117148576A/en
Publication of CN117148576A publication Critical patent/CN117148576A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
    • G02B17/0694—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror with variable magnification or multiple imaging planes, including multispectral systems
    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements

Abstract

The invention relates to the technical field of head-up displays, in particular to a zoom projection device and a control method thereof. The zoom projection device comprises a first image source, a second image source, a first reflecting device and a second reflecting device; the reflecting surface of the first reflecting device faces the first image source and the second reflecting device; the second image source is directed towards the second reflecting means; the first image information and the second image information reach the windshield by reflection from the second reflecting means. The zoom projection device adopts a double-display scheme, and separates two image sources, so that the possibility of displaying channeling light with different focal lengths is avoided, and stray light is reduced; according to the zoom projection device, the optical path is adjusted through the first reflecting device and the second reflecting device, so that imaging of the first image source is located above imaging of the second image source at the front windshield to form two visual angles, imaging distances are different, and driving experience is improved.

Description

Zoom projection device and control method thereof
Technical Field
The invention relates to the technical field of head-up displays, in particular to a zoom projection device and a control method thereof.
Background
The imaging distance of the Head Up Display (HUD) is mostly fixed, however, the single projection distance is difficult to meet the use requirements of the driver in different environments. For example, in crowded areas, a close-range HUD is more suitable to use, reducing the interference of the environment to the driver; the method is more suitable for the long-distance AR HUD in the scene with wide vision, and is favorable for fusing the projection picture and the actual scene to obtain better driving experience.
The zoom schemes of the prior art mainly have three kinds:
1. and displaying a screen in a double distance mode. A screen is used, and a large curved mirror is shared by two small reflectors.
2. And the projection optical machine is used for split-screen double-distance display. The projection light machine is used as a display unit, and the split screen is realized by utilizing different focal lengths of the projection light machine to generate a near-far double screen, and a small reflector and a large reflector are shared.
3. The optical path between the reflecting mirror and the display unit is adjusted to realize the change of the imaging distance.
However, these three schemes have great limitations:
scheme 1 stray light is serious, double focal planes show mutual light channeling, and the driver experience is poor.
In addition, because the projection optical machine has the optimal display distance, the image definition, distortion and display effect are all the best under the distance, in order to realize split screen, two screens are required to be displayed under different distances, and the risk of unclear display exists in the imaging picture of the HUD.
Scheme 3 changes the optical path of speculum and display element and needs to increase motor drive, and the adjustment precision is difficult to manage and control, and the motor can bring the risk that the noise is big.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a zoom projection device and a control method thereof.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a zoom projection device for projecting vehicle-mounted information onto a windshield, comprising a first image source, a second image source, a first reflecting device and a second reflecting device;
the reflecting surface of the first reflecting device faces the first image source and the second reflecting device, and the first image information emitted by the first image source passes through the first reflecting device to reach the lower position of the second reflecting device;
the second image source faces the second reflecting device, and second image information emitted by the second image source directly reaches the upper position of the second reflecting device;
the first image information and the second image information reach the windshield through the reflection of the second reflecting device, the first image information and the second image information are imaged at positions with different visual angles and different distances through the windshield, the first image information is imaged at a far focus position, and the second image information is imaged at a near focus position.
Further, the first image source is a far-focus image source, the first image source is reflected and imaged at a far-focus position through the first reflecting device and the second reflecting device, the first image source comprises a first TFT display screen and a first backlight light source, and the first backlight light source is used for illuminating the first TFT display screen.
Further, the first reflecting device is a plane reflecting mirror, and the position of the first reflecting device is close to the position of the second image source.
Further, the second image source is a near-focus image source, the second image source is reflected and imaged at a near-focus position through the second reflecting device, the second image source comprises a second TFT display screen and a second backlight light source, and the second backlight light source is used for illuminating the second TFT display screen.
Further, the imaging viewing angle of the first image source is positioned above the imaging viewing angle of the second image source.
Further, an included angle between the imaging position of the first image source and the horizontal plane is 1-3 degrees, and an included angle between the imaging position of the second image source and the horizontal plane is 3-6 degrees.
Further, the second reflecting device is a large curved surface reflecting mirror, and the first image information and the second image information reach the windshield through reflection of the large curved surface reflecting mirror.
Further, the second reflecting device is a first curved surface reflecting mirror and a second curved surface reflecting mirror, the first image information reaches the windshield through reflection of the first curved surface reflecting mirror, and the second image information reaches the windshield through reflection of the second curved surface reflecting mirror.
The invention also provides a control method of the zooming projection device, which comprises the following steps:
step 1, a control system of an automobile acquires road condition information through a sensor of the automobile and receives a projection state of the zooming projection device;
step 2, if the road condition information is the driving environment of the open area, judging whether the projection imaging of the zooming projection device is positioned at the far focus position, if not, switching the zooming projection device to a first image source for working, and imaging at the far focus position; if the road condition information is a traffic environment in a crowded area, judging whether the projection imaging of the zoom projection device is positioned at a near-focus position, if not, switching the zoom projection device to a second image source for working, and imaging at the near-focus position;
and step 3, determining whether the far focus position and the near focus position are required to display images simultaneously according to the requirements by a driver, and if so, switching the projection state of the zoom projection device to the first image source and the second image source to work simultaneously.
Further, if the first image source and the second image source operate simultaneously, the first image information and the second image information are different information.
As can be seen from the above description of the present invention, compared with the prior art, the zoom projection apparatus of the present invention has at least one of the following advantages:
1. the zoom projection device adopts a double-display scheme, and separates two image sources, so that the possibility of displaying channeling light with different focal lengths is avoided, and stray light is reduced;
2. according to the zoom projection device, the optical path is adjusted through the first reflecting device and the second reflecting device, so that imaging of the first image source is positioned above imaging of the second image source at the front windshield to form two visual angles, imaging distances are different, the two visual angles are provided under the near focus and the far focus, information can be displayed at the same time by the near focus and the far focus without mutual influence, different driving environments are adapted, and driving experience is improved;
3. the zoom projection device adopts a TFT display scheme, the TFT screen is an active matrix liquid crystal, the brightness of a backlight source is needed to display images, the backlight source is used for projecting the images of the TFT display screen onto a windshield, the definition is high, and the cost is low;
4. the control method can combine road condition information acquired by the sensor of the automobile, intelligently switch the first image source and the second image source to work, select near focus in crowded places and select far focus in open places, has good display effect, and can simultaneously work to display more driving information so as to facilitate driving.
Drawings
FIG. 1 is a schematic view of an optical path structure of a zoom projection apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an optical path structure of a zoom projection apparatus according to a second embodiment of the present invention;
FIG. 3 is a flow chart showing the steps of a control method of a zoom projection apparatus according to the present invention;
the reference numerals in the figures illustrate: 1. a windshield; 2. a first image source; 3. a second image source; 4. a first reflecting means; 5. a second reflecting means; 6. a far focus position; 7. a near-focus position; 21. a first TFT display; 22. a first backlight source; 31. a second TFT display; 32. a second backlight source; 51. a large curved mirror; 52. a first curved mirror; 53. and a second curved mirror.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
First embodiment:
referring to fig. 1, a zoom projection apparatus for projecting vehicle-mounted information onto a windshield 1 according to a preferred embodiment of the present invention includes a first image source 2, a second image source 3, a first reflecting means 4, and a second reflecting means 5;
the reflecting surface of the first reflecting device 4 faces the first image source 2 and the second reflecting device 5, and the first image information emitted by the first image source 2 passes through the first reflecting device 4 to reach the lower position of the second reflecting device 5;
the second image source 3 faces the second reflecting device 5, and the second image information emitted by the second image source 3 directly reaches the upper position of the second reflecting device 5;
the first image information and the second image information reach the windshield 1 through the reflection of the second reflecting device 5, the first image information and the second image information are imaged at positions with different visual angles and different distances through the windshield 1, the first image information is imaged at a far focus position 6, and the second image information is imaged at a near focus position 7.
The zoom projection device adopts a double-display scheme, and separates two image sources, so that the possibility of displaying channeling light with different focal lengths is avoided, and stray light is reduced; according to the zoom projection device, the light path is adjusted through the first reflecting device 4 and the second reflecting device 5, so that the imaging of the first image source 2 is positioned above the imaging of the second image source 3 at the position of the front windshield 1, two visual angles are formed, the imaging distances are different, the two visual angles are met under the near focus and the far focus, the near focus and the far focus can simultaneously display information without mutual influence, different driving environments are adapted, and the driving experience is improved; the zoom projection device adopts a TFT display scheme, the TFT screen is an active matrix liquid crystal, the brightness of a backlight source is needed to display images, the backlight source is used for projecting the images of the TFT display screen onto the windshield 1, the definition is high, and the cost is low;
as a preferred embodiment of the invention, it may also have the following additional technical features:
in this embodiment, the first image source 2 is a far-focus image source, the first image source 2 is reflected and imaged at the far-focus position 6 by the first reflecting device 4 and the second reflecting device 5, the first image source 2 includes a first TFT display screen 21 and a first backlight light source 22, and the first backlight light source 22 is used for illuminating the first TFT display screen 21. The first image information sent by the first image source 2 is reflected by the first reflecting device 4 and then reflected by the second reflecting device 5, so that the optical path length of the optical path is longer to be imaged at the far focus position 6, and the first image source 2 adopts the first TFT display screen 21 and the first backlight source 22, so that the definition is higher and the cost is lower.
In this embodiment, the first reflecting device 4 is a plane mirror, and the position of the first reflecting device 4 is close to the position of the second image source 3. The plane reflector is adopted by the first reflecting device 4 to increase the optical path, so that the whole structure is smaller, the miniaturization requirement is met, meanwhile, the optical path can be better calculated and adjusted, and the surface shape of the first reflecting device 4 can be spherical, free-form surface, cylindrical and the like; the first reflecting device 4 and the second image source 3 are close to each other, so that images emitted by the first image source 2 and the second image source 3 can reach the second reflecting device 5, and the situation that the viewing angle deviation of the final display of the two images is too large and is unfavorable for a driver to view is avoided.
In this embodiment, the second image source 3 is a near-focus image source, the second image source 3 is reflected by the second reflecting device 5 to be imaged at the near-focus position 7, the second image source 3 includes a second TFT display screen 31 and a second backlight light source 32, and the second backlight light source 32 is used for illuminating the second TFT display screen 31. The second image information sent by the second image source 3 is directly reflected by the second reflecting device 5, so that the optical path of the optical path is shorter to be imaged at the near-focus position 7, the second image source 3 adopts the second TFT display screen 31 and the second backlight light source 32, the definition is higher, and the cost is lower.
In the present embodiment, the imaging viewing angle of the first image source 2 is located above the imaging viewing angle of the second image source 3. The visual angles of the two image displays are not interfered with each other, and the far-focus image of the first image source 2 is more easily interfered by the surrounding environment, so that the device is arranged above the device, interference is reduced, and driving experience is improved.
In this embodiment, the included angle between the imaging position of the first image source 2 and the horizontal plane is 1 ° -3 °, and the included angle between the imaging position of the second image source 3 and the horizontal plane is 3 ° -6 °. The visual angle of the second image source 3 is 1-3 degrees, the visual angle of the second image source 3 is 3-6 degrees, and the two visual angle positions are close to each other and have a small included angle with the horizontal plane, so that the viewing by a driver is facilitated.
In this embodiment, the second reflecting device 5 is a large curved mirror 51, and the first image information and the second image information reach the windshield 1 through reflection of the large curved mirror 51. The second reflecting device 5 adopts a large curved surface reflecting mirror 51, the first image information and the second image information can be reflected simultaneously through the large curved surface reflecting mirror 51, the design of the free curved surface can enable the two images to be better imaged at the windshield 1, and the two visual angles are not greatly different.
Specific embodiment II:
the first difference between this embodiment and the second embodiment is that: the second reflecting device 5 is a first curved reflecting mirror 52 and a second curved reflecting mirror 53, the first image information reaches the windshield 1 through the reflection of the first curved reflecting mirror 52, and the second image information reaches the windshield 1 through the reflection of the second curved reflecting mirror 53.
The first image information and the second image information are reflected by the first curved mirror 52 and the second curved mirror 53, respectively, so that the size of the large curved mirror 51 can be reduced, and the manufacturing cost can be reduced by detaching the large free-form-surface mirror into the first curved mirror 52 and the second curved mirror 53 because the manufacturing cost is high.
The invention also provides a control method of the zooming projection device, which comprises the following steps:
step 1, a control system of an automobile acquires road condition information through a sensor of the automobile and receives a projection state of the zooming projection device;
step 2, if the road condition information is the driving environment of the open area, judging whether the projection imaging of the zooming projection device is positioned at the far focus position 6, if not, switching the zooming projection device to the first image source 2 to work, and imaging at the far focus position 6; if the road condition information is a traffic environment in a crowded area, judging whether the projection imaging of the zoom projection device is positioned at a near-focus position 7, if not, switching the zoom projection device to a second image source 3 to work, and imaging at the near-focus position 7;
and 3, determining whether the far focus position 6 and the near focus position 7 are required to display images simultaneously according to the requirements by a driver, and if so, switching the projection state of the zoom projection device to the state that the first image source 2 and the second image source 3 work simultaneously.
The control method can combine road condition information acquired by the sensors of the automobile, intelligently switch the first image source 2 and the second image source 3 to work, select near focus in crowded places and select far focus in open places, has good display effect, and the first image source 2 and the second image source 3 can work simultaneously to display more driving information, thereby being convenient for driving.
In the present embodiment, if the first image source 2 and the second image source 3 operate simultaneously, the first image information and the second image information are different information. When two display modes exist simultaneously, the information content of the far-focus projection is mainly convenient for fusing scenes, such as steering, lane changing, lane display and the like; and the close-range content is mainly the speed of time and the gear.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution and the modified concept thereof, within the scope of the present invention.

Claims (10)

1. A zoom projection device for projecting vehicle information onto a windscreen (1), characterized by comprising a first image source (2), a second image source (3), a first reflection means (4) and a second reflection means (5);
the reflecting surface of the first reflecting device (4) faces the first image source (2) and the second reflecting device (5), and the first image information emitted by the first image source (2) passes through the first reflecting device (4) to reach the lower position of the second reflecting device (5);
the second image source (3) faces the second reflecting device (5), and second image information emitted by the second image source (3) directly reaches the upper position of the second reflecting device (5);
the first image information and the second image information reach the windshield (1) through the reflection of the second reflecting device (5), the first image information and the second image information are imaged at positions with different visual angles and different distances through the windshield (1), the first image information is imaged at a far focus position (6), and the second image information is imaged at a near focus position (7).
2. A zoom projection device according to claim 1, characterized in that the first image source (2) is a tele image source, the first image source (2) being imaged in a tele position (6) by reflection by the first reflecting means (4) and the second reflecting means (5), the first image source (2) comprising a first TFT display screen (21) and a first backlight source (22), the first backlight source (22) being arranged to illuminate the first TFT display screen (21).
3. A zoom projection device according to claim 1, characterized in that the first reflecting means (4) is a planar mirror, the first reflecting means (4) being located close to the position of the second image source (3).
4. A zoom projection device according to claim 1, wherein the second image source (3) is a near-focus image source, the second image source (3) being imaged in a near-focus position (7) by reflection by the second reflection means (5), the second image source (3) comprising a second TFT display screen (31) and a second backlight source (32), the second backlight source (32) being adapted to illuminate the second TFT display screen (31).
5. A zoom projection device according to claim 1, characterized in that the imaging viewing angle of the first image source (2) is located above the imaging viewing angle of the second image source (3).
6. A zoom projection device according to claim 1, characterized in that the imaging position of the first image source (2) is at an angle of 1 ° -3 ° to the horizontal, and the imaging position of the second image source (3) is at an angle of 3 ° -6 ° to the horizontal.
7. A zoom projection device according to claim 1, characterized in that the second reflecting means (5) is a large curved mirror (51), and the first image information and the second image information reach the windscreen (1) via reflection by the large curved mirror (51).
8. A zoom projection device according to claim 1, characterized in that the second reflecting means (5) is a first curved mirror (52) and a second curved mirror (53), the first image information reaching the windscreen (1) by reflection from the first curved mirror (52) and the second image information reaching the windscreen (1) by reflection from the second curved mirror (53).
9. A control method of a zoom projection apparatus, comprising the steps of:
step 1, a control system of an automobile acquires road condition information through a sensor of the automobile and receives a projection state of the zooming projection device;
step 2, if the road condition information is the driving environment of the open area, judging whether the projection imaging of the zooming projection device is positioned at the far focus position (6), if not, switching the zooming projection device to the first image source (2) to work, and imaging at the far focus position (6); if the road condition information is a traffic environment in a crowded area, judging whether the projection imaging of the zoom projection device is positioned at a near-focus position (7), if not, switching the zoom projection device to a second image source (3) to work, and imaging at the near-focus position (7);
and 3, determining whether the far focus position (6) and the near focus position (7) are required to display images simultaneously or not by a driver according to requirements, and if so, switching the projection state of the zoom projection device to the first image source (2) and the second image source (3) to work simultaneously.
10. A control method of a zoom projection apparatus according to claim 9, characterized in that the first image information and the second image information are different information if the first image source (2) and the second image source (3) are operated simultaneously.
CN202310956346.8A 2023-08-01 2023-08-01 Zoom projection device and control method thereof Pending CN117148576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310956346.8A CN117148576A (en) 2023-08-01 2023-08-01 Zoom projection device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310956346.8A CN117148576A (en) 2023-08-01 2023-08-01 Zoom projection device and control method thereof

Publications (1)

Publication Number Publication Date
CN117148576A true CN117148576A (en) 2023-12-01

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Application Number Title Priority Date Filing Date
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Country Status (1)

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CN (1) CN117148576A (en)

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