WO2022141853A1 - 一种投影光学系统及汽车的抬头显示装置 - Google Patents

一种投影光学系统及汽车的抬头显示装置 Download PDF

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WO2022141853A1
WO2022141853A1 PCT/CN2021/083363 CN2021083363W WO2022141853A1 WO 2022141853 A1 WO2022141853 A1 WO 2022141853A1 CN 2021083363 W CN2021083363 W CN 2021083363W WO 2022141853 A1 WO2022141853 A1 WO 2022141853A1
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optical system
projection optical
image
lens
imaging
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PCT/CN2021/083363
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English (en)
French (fr)
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朱炜湛
唐晓峰
丁明内
杨伟樑
高志强
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广景视睿科技（深圳）有限公司
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Priority to US17/544,223 priority Critical patent/US20220203831A1/en
Publication of WO2022141853A1 publication Critical patent/WO2022141853A1/zh

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles

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  • the embodiments of the present application relate to the technical field of projection optics, and in particular, to a projection optical system and a head-up display device of an automobile.
  • HUD refers to the head-up display through the windshield of the car.
  • the new smart car is usually equipped with a HUD, which allows users to observe the speed, speed limit indication, and driving route without looking down at the dashboard.
  • the HUD mounted in the car that is, the head-up display device
  • the HUD mounted in the car usually cannot adjust the size of the image and the distance of the imaged virtual image.
  • the system needs to be redesigned to adapt to different cars when setting the projection optical system, and it is difficult to adjust again once the setting is completed.
  • the purpose of the embodiments of the present application is to provide a projection optical system and a head-up display device for an automobile whose imaging effect can be easily adjusted.
  • the embodiments of the present application provide a projection optical system, which is applied to a head-up display device of an automobile, and the system includes:
  • an image generating unit for emitting a light beam containing image information of the projected image
  • a first reflecting unit the light incident side of which is arranged in the light exit direction of the image generating unit
  • a double telecentric lens the light incident side of which is arranged in the light exit direction of the light reflection side of the first reflection unit, and the double telecentric lens is configured to adjust the size of the projected image
  • a second reflection unit the light incident side of which is arranged in the light emitting direction of the light emitting side of the double telecentric lens
  • An imaging lens the light incident side of which is arranged in the light exit direction of the light reflection side of the second reflection unit, the imaging lens is configured to be able to adjust the virtual image distance of the projected image, and output the light beam of the projected image to achieve projection imaging.
  • the double telecentric lens includes a first refractive lens group and a second refractive lens group
  • the projection optical system further includes:
  • a controller configured to adjust the size of the projected image by controlling the positions of the first refractive lens group and the second refractive lens group in the double telecentric lens.
  • the projection optical system further includes:
  • a first driving device which is respectively connected with the controller and the double telecentric lens, is used for driving the double telecentric lens to adjust the size of the light output image of the double telecentric lens according to the control instruction issued by the controller.
  • the automobile further includes a front windshield, the front windshield is a diffuser, and in the projection optical system, a relay image of the imaging lens is imaged on the front windshield On the glass, the projection optical system further includes:
  • a second driving device which is respectively connected with the controller and the imaging lens, is used for driving the imaging lens to adjust the imaging position of the light emitted by the imaging lens according to the control instruction issued by the controller.
  • the first reflecting unit is a turning prism, which is disposed between the image generating unit and the double telecentric lens at a first preset angle.
  • the second reflecting unit is a reflecting mirror, which is disposed between the double telecentric lens and the imaging lens at a second preset angle.
  • the optical power of the imaging lens is 40 mm, and the focal length of the imaging lens is 24 mm.
  • the optical power of the first refractive lens group is 15mm, and the focal length of the first refractive lens group is 8.6mm;
  • the optical power of the second refractive lens group is 8 mm, and the focal length of the second refractive lens group is 6 mm.
  • the image generating unit is a DLP display chip or an LCOS display chip.
  • an embodiment of the present application provides a head-up display device for an automobile, including: the projection optical system according to the above-mentioned first aspect, the projection optical system can project an image on any imaged on the front windshield of the car.
  • the embodiment of the present application provides a projection optical system applied to a head-up display device of an automobile, which comprises the following steps: an image generation unit, a first reflection unit, a double telecentric lens, a second reflection unit, and an imaging lens, the double telecentric lens is configured to adjust the size of the projected image, and the imaging lens is configured to adjust The virtual image distance of the projected image, and output the light beam of the projected image to realize projected imaging, the projection optical system provided by the embodiment of the present application can flexibly adjust the size of the image through the double telecentric lens, and flexibly adjust the image through the imaging lens
  • the virtual image distance can be applied to the head-up display devices of different types of automobiles, and the imaging effect is good, the volume is small, and the cost is low.
  • FIG. 1 is a schematic diagram of an application scenario of a projection optical system provided by an embodiment of the present application
  • Fig. 2 is an imaging schematic diagram of the front windshield in the application scene shown in Fig. 1;
  • FIG. 3 is a schematic structural diagram of a projection optical system provided in Embodiment 1 of the present application.
  • FIG. 4 is a schematic diagram of an optical path diagram of the structure of the projection optical system shown in FIG. 3;
  • FIG. 5 is a schematic block diagram of an electrical connection structure of a projection optical system provided in Embodiment 1 of the present application;
  • FIG. 6 is a schematic structural diagram of a head-up display device for an automobile according to Embodiment 2 of the present application.
  • connection structure In order to facilitate the definition of the connection structure, the present application uses the light exit direction of the light beam as a reference to define the position of the components.
  • the terms “upper,” “lower,” “left,” “right,” “vertical,” “horizontal,” and similar expressions used in this specification are for illustrative purposes only.
  • the position of the components is defined with reference to the direction in which the light beam is incident on the spectroscopic device from a plan view direction.
  • an embodiment of the present application provides a projection optical system, whose double telecentric lens can flexibly adjust the size of the image, through imaging
  • the lens flexibly adjusts the virtual image distance of the image, can be applied to head-up display devices of different types of automobiles, and has good imaging effect, small size and low cost.
  • FIG. 1 is a schematic diagram of one application environment of the projection optical system provided by an embodiment of the present application
  • FIG. 2 is an imaging diagram of a front windshield in the application scenario shown in FIG. 1
  • the application environment includes: a car 1
  • the car 1 includes: a front windshield a and a head-up display device 10.
  • the projection optical system 100 provided in the embodiment of the present application is used to realize the imaging display of two kinds of image pictures, and the projection optical system 100 can output the projection image P1 through the imaging lens 110 .
  • the projection image P1 can be used to display a two-dimensional image, for example, the driving information of the car 1, the driving information including but not limited to the speed information of the car 1, fuel level information, etc.
  • the car 1 should be equipped with a speed sensor, a fuel sensor, etc., specifically, the setting of the two-dimensional image, the setting of the driving information of the car 1, and the setting of the corresponding sensors can be performed according to actual needs. Selection does not need to be bound by the limitations of the application scenarios of this application.
  • the projected image P1 can also be used to display a three-dimensional image, that is, an AR image, for example, the road condition information of the road where the car 1 is located, and the road condition information includes but is not limited to the car 1.
  • the car 1 should be equipped with detection equipment such as cameras and lidars. Further, if the car 1 It can realize the navigation function, and can also superimpose the navigation instruction information on the road condition information to display together. You need to make a selection, and you do not need to be bound by the limitations of the application scenarios of this application.
  • the front windshield a is preferably made of a glass material capable of clear imaging and good light transmittance. Specifically, it can be selected according to actual needs, and does not need to be limited by the application scenario of this application.
  • the embodiment of the present application provides a projection optical system, which can be applied to the head-up display device of an automobile as described in the above application scenario. Please refer to FIG. 3 , FIG. 4 and FIG. 5 together, wherein FIG. 3 is provided by the present application.
  • a structure of a projection optical system FIG. 4 is an optical path diagram of the structure of the projection optical system shown in FIG. 3
  • FIG. 5 is a block diagram of an electrical connection structure of a projection optical system provided by an embodiment of the present application.
  • the projection optical system 100 includes: : imaging lens 110 , image generating unit 120 , first reflecting unit 130 , double telecentric lens 140 , second reflecting unit 150 , controller 160 , first driving device 171 , and second driving device 172 .
  • the image generation unit 120 is used to emit a light beam containing image information of the projected image; the image generation unit 120 is a DLP (Digital Light Processing) display chip or an LCOS (Liquid Crystalon Silicon, liquid crystal on silicon) display chip. In the embodiment of the present application, the image generating unit 120 further includes an effective surface 121 and a protective glass 122 . In some other embodiments, the image generation unit 120 may also be other image display chips such as a DMD (Digital Micromirror Device) display chip. Specifically, the image generation unit 120 can be set according to actual needs, and does not need to be rigid. limited to the embodiments of the present application.
  • the first reflection unit 130 whose light incident side is arranged in the light exit direction of the image generation unit 120; the first reflection unit 130 is a turning prism, which is arranged at the image generation unit at a first preset angle Between 120 and the double telecentric lens 140, the turning prism used by the first reflection unit 130 may be a total internal reflection prism TIR, so as to realize all reflection of the light beam.
  • TIR total internal reflection prism
  • the first reflection unit 130 is a right-angled triangular prism, the right-angle surface of which is opposite to the image generating unit 120 , and the other right-angle surface is opposite to the double telecentric lens 140 ,
  • the reflection angle of the inclined surface of the first reflection unit 130 is 90 degrees, that is, the first preset angle of the first reflection unit 130 is 45 degrees, which is arranged in the optical path at the preset angle,
  • the selection of the model and material of the first reflection unit 130 and the setting of the first preset angle can be set according to actual needs, and do not need to be bound by the embodiments of the present application. limited.
  • the light incident side of the double telecentric lens 140 is disposed in the light exit direction of the light reflection side of the first reflection unit 130 .
  • the double telecentric lens 140 includes a first refractive lens group 141 and a second refractive lens group 142 , and the controller 160 is configured to control the first refractive lens group 141 in the double telecentric lens 140 by controlling and the position of the second refractive lens group 142 to adjust the size of the projected image; the first driving device 171, which is respectively connected with the controller 160 and the double telecentric lens 140, is used to adjust the size of the projected image according to the The control instruction issued by the controller 160 drives the first refractive lens group 141 and the second refractive lens group 142 to adjust the image size of the light emitted by the first refractive lens group 141 and the second refractive lens group 142 .
  • the refractive power of the first refractive lens group 141 is 15 mm, and the focal length of the first refractive lens group 141 is 8.6 mm; the refractive power of the second refractive lens group 142 is 8 mm, and the second refractive lens Group 142 has a focal length of 6mm.
  • the first refractive lens group 141 and/or the second refractive lens group 142 may be a single lens, or may be a lens group composed of multiple lenses, which may also include other optical devices. In actual usage scenarios, settings can be made according to actual needs, and do not need to be bound by the limitations of the embodiments of the present application.
  • the optical power and focal length of the first refractive lens group 141 and/or the second refractive lens group 142 are only a design parameter obtained by software simulation in the embodiment shown in FIG. 4 of the present application.
  • the specific design parameters of the first refractive lens group 141 and/or the second refractive lens group 142 can also be obtained according to software simulation to obtain other parameters. Examples provided in the embodiments of the present application It is not used to make any limitation on the design parameters of the first refractive lens group 141 and/or the second refractive lens group 142 during actual simulation or production.
  • the light incident side of the second reflection unit 150 is arranged in the light exit direction of the light exit side of the double telecentric lens 140; the second reflection unit 150 is a reflection mirror, which is arranged at the second preset angle at the light output direction. Between the double telecentric lens 140 and the imaging lens 110, the second reflection unit 150 may further include a reflection enhancement film coated on the reflection mirror, so as to realize all reflection of the light beam.
  • the reflection angle of the inclined surface of the second reflection unit 150 is 90 degrees, that is, the second preset angle of the second reflection unit 150 is 45 degrees, which is the same as The preset angle is set in the optical path.
  • the selection of the model and material of the second reflection unit 150, and the setting of the second preset angle can be performed according to actual needs. The settings do not need to be bound by the limitations of the embodiments of the present application.
  • the light incident side of the imaging lens 110 is disposed in the light exit direction of the light reflecting side of the second reflection unit 150 ; the optical power of the imaging lens 110 is 40 mm, and the focal length of the imaging lens 110 is 24 mm.
  • the imaging lens 110 may be a single lens, or may be a lens group consisting of multiple lenses, and may also include other optical devices. It is bound by the limitations of the embodiments of the present application. It should be noted that the optical power and focal length of the imaging lens 110 are only a design parameter obtained by the software simulation of the embodiment shown in FIG. 4 of the present application. The specific design parameters of the lens 110 may also be obtained according to software simulation, and the examples provided in the embodiments of the present application are not used to limit the design parameters of the imaging lens 110 during actual simulation or production.
  • the controller 160 which is respectively connected with the image generation unit 120, the double telecentric lens 140 and the imaging lens 110, is used to control the light output of the image emitted by the image generation unit 120, adjust the
  • the bi-telecentric lens 140 is used to adjust the imaging size, and the imaging lens 110 is adjusted to adjust the imaging distance;
  • the controller 160 can be various chips or modules with computing functions, such as processors and servers that are commonly used in optical projection and can send control instructions.
  • unit, device and/or equipment further, the controller 160 may also have a communication function with the outside world and/or accept the calculation and/or control functions normally possessed by projection equipment such as user gestures or instructions, etc.
  • the corresponding controller 160 can be selected according to actual needs, and does not need to be bound by the limitations of the embodiments of the present application.
  • the car 1 further includes a front windshield a, and in the projection optical system 100, the relay image P1 of the imaging lens 110 is imaged on the front windshield a.
  • the controller 160 is further connected to the imaging lens 110 , and the controller 160 is configured to adjust the position of the projection image P1 in the front block by controlling the position of the imaging lens 110 .
  • the second driving device 172 which is respectively connected to the controller 160 and the imaging lens 110, is used to drive the imaging lens 110 to emit light according to the control instructions issued by the controller 160. Adjust the imaging position.
  • the image generation unit 120 plays the image information of the projected image P1, emits a light beam, and the light beam passes through the first A reflection unit 130 enters the double telecentric lens 140 after being reflected, and then is reflected by the second reflection unit 150 into the imaging lens 110 and then projected on the front windshield a of the car 1 to display the projected image P1. Further, the distance of the virtual image presented on the front windshield a can also be adjusted by adjusting the focal length and position of the imaging lens 110 or even replacing lenses with different magnifications.
  • the front windshield can be adjusted.
  • the first driving device 171 and/or the second driving device 172 may drive the double telecentric lens 140 and/or the imaging lens 110 in a mechanical manner, or may be driven by software.
  • the double telecentric lens 140 and/or the imaging lens 110 are respectively driven, or, the double telecentric lens 140 and/or the imaging lens 110 may be driven respectively by a combination of soft and hard.
  • An embodiment of the present application provides a head-up display device for an automobile.
  • the car may be the car 10 described in the above application scenario
  • the head-up display device may be the head-up device described in the above application scenario.
  • FIG. 6 The structure of a head-up display device 10 for an automobile provided by an embodiment of the present application is shown.
  • the head-up display device 10 includes the projection optical system 100 described in the first embodiment above, and the projection optical system 100 can convert the The projection image P1 is projected on the front windshield a of the automobile 10 to realize imaging.
  • An embodiment of the present application provides a projection optical system applied to a head-up display device of an automobile, which includes an image generation unit, a first reflection unit, a double telecentric lens, a second reflection unit, and an imaging lens arranged in sequence according to the light output direction , the double telecentric lens is configured to adjust the size of the projected image, the imaging lens is configured to adjust the virtual image distance of the projected image, and output the light beam of the projected image to realize projected imaging, the present
  • the projection optical system provided by the application embodiment can flexibly adjust the size of the image through the double telecentric lens, and flexibly adjust the virtual image distance of the image through the imaging lens. Small size and low cost.
  • the device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separated unit, that is, it can be located in one place, or it can be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

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Abstract

一种应用于汽车的抬头显示装置的投影光学系统（100），其包括按出光方向依次设置的图像生成单元（120）、第一反射单元（130）、双远心镜头（140）、第二反射单元（150）和成像镜头（110），双远心镜头（140）配置为可用于调整投影图像（P1）的尺寸，成像镜头（110）配置为可用于调整投影图像（P1）的虚像距离，并输出投影图像（P1）的光束以实现投影成像；投影光学系统（100）可通过双远心镜头（140）灵活调节图像的尺寸，通过成像镜头（110）灵活调节图像的虚像距离，能够应用于不同类型的汽车的抬头显示装置中，且成像效果好、体积小、成本低。

Description

一种投影光学系统及汽车的抬头显示装置
相关申请的交叉参考
本申请要求于2020年12月28日提交中国专利局，申请号为202011577842.5，申请名称为“一种投影光学系统及汽车的抬头显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及投影光学技术领域，特别涉及一种投影光学系统及汽车的抬头显示装置。
背景技术
HUD是指通过汽车风挡式抬头显示器，如今随着汽车的智能化发展，目前新型智能汽车中通常都搭配有HUD，这使得用户无需低头查看仪表盘就可以观察到车速、限速指示、驾驶路线图等车辆信息和路况信息，其中AR HUD是目前HUD发展的趋势，AR HUD即能够显示AR画面的抬头显示装置。
在实现本申请实施例过程中，申请人发现以上相关技术中至少存在如下问题：目前，汽车中搭载的HUD，即抬头显示装置，通常图像的大小尺寸和所成像的虚像距离都是无法调节的，对于不同类型的汽车，由于前挡风玻璃的姿态不同，对于成像的需求不同，在设置投影光学系统时都需要对系统进行重新设计以适应不同的汽车，且一旦设置完毕难以再次进行调整。
发明内容
针对现有技术的上述缺陷，本申请实施例的目的是提供一种成像效 果容易调节的投影光学系统及汽车的抬头显示装置。
本申请实施例的目的是通过如下技术方案实现的：
为解决上述技术问题，第一方面，本申请实施例中提供了一种投影光学系统，应用于汽车的抬头显示装置，所述系统包括：
图像生成单元，用于出射包含投影图像的图像信息的光束；
第一反射单元，其入光侧设置在所述图像生成单元的出光方向上；
双远心镜头，其入光侧设置在所述第一反射单元的反光侧的出光方向上，所述双远心镜头配置为可用于调整所述投影图像的尺寸；
第二反射单元，其入光侧设置在所述双远心镜头的出光侧的出光方向上；
成像镜头，其入光侧设置在所述第二反射单元的反光侧的出光方向上，所述成像镜头配置为可用于调整所述投影图像的虚像距离，并输出所述投影图像的光束以实现投影成像。
在一些实施例中，所述双远心镜头包括第一折射透镜组和第二折射透镜组，所述投影光学系统还包括：
控制器，其配置为通过控制所述双远心镜头中所述第一折射透镜组和所述第二折射透镜组的位置，以调整所述投影图像的尺寸。
在一些实施例中，所述投影光学系统还包括：
第一驱动装置，其分别与所述控制器和所述双远心镜头连接，用于根据所述控制器下发的控制指令驱动所述双远心镜头对其出光的图像尺寸进行调整。
在一些实施例中，所述汽车还包括前挡风玻璃，所述前挡风玻璃为漫射体，在所述投影光学系统中，所述成像镜头的中继像成像在所述前挡风玻璃上，所述投影光学系统还包括：
第二驱动装置，其分别与所述控制器和所述成像镜头连接，用于根 据所述控制器下发的控制指令驱动所述成像镜头对其出光的成像位置进行调整。
在一些实施例中，所述第一反射单元为转向棱镜，其呈第一预设角度设置在所述图像生成单元和所述双远心镜头之间。
在一些实施例中，所述第二反射单元为反射镜，其呈第二预设角度设置在所述双远心镜头和所述成像镜头之间。
在一些实施例中，所述成像镜头的光焦度为40mm，所述成像镜头的焦距为24mm。
在一些实施例中，所述第一折射透镜组的光焦度为15mm，所述第一折射透镜组的焦距为8.6mm；
所述第二折射透镜组的光焦度为8mm，所述第二折射透镜组的焦距为6mm。
在一些实施例中，所述图像生成单元为DLP显示芯片或者LCOS显示芯片。
为解决上述技术问题，第二方面，本申请实施例中提供了一种汽车的抬头显示装置，包括：如上述第一方面所述的投影光学系统，所述投影光学系统能够将图像投影在所述汽车的前挡风玻璃上实现成像。
与现有技术相比，本申请的有益效果是：区别于现有技术的情况，本申请实施例中提供了一种应用于汽车的抬头显示装置的投影光学系统，其包括按出光方向依次设置的图像生成单元、第一反射单元、双远心镜头、第二反射单元和成像镜头，所述双远心镜头配置为可用于调整所述投影图像的尺寸，所述成像镜头配置为可用于调整所述投影图像的虚像距离，并输出所述投影图像的光束以实现投影成像，本申请实施例 提供的投影光学系统可通过所述双远心镜头灵活调节图像的尺寸，通过成像镜头灵活调节图像的虚像距离，能够应用于不同类型的汽车的抬头显示装置中，且成像效果好、体积小、成本低。
附图说明
一个或多个实施例中通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件/模块表示为类似的元件/模块，除非有特别申明，附图中的图不构成比例限制。
图1是本申请实施例提供的一种投影光学系统的应用场景示意图；
图2是图1所示应用场景中前挡风玻璃的成像示意图；
图3是本申请实施例一提供的一种投影光学系统的结构示意图；
图4是图3所示投影光学系统结构的光路图示意图；
图5是本申请实施例一提供的一种投影光学系统的电气连接结构框图示意图；
图6是本申请实施例二提供的一种汽车的抬头显示装置的结构示意图。
具体实施方式
下面结合具体实施例对本申请进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本申请，但不以任何形式限制本申请。应当指出的是，对本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进。这些都属于本申请的保护范围。
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的 具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，如果不冲突，本申请实施例中的各个特征可以相互结合，均在本申请的保护范围之内。另外，虽然在装置示意图中进行了功能模块划分，但是在某些情况下，可以以不同于装置中的模块划分。此外，本文所采用的“第一”、“第二”等字样并不对数据和执行次序进行限定，仅是对功能和作用基本相同的相同项或相似项进行区分。
为了便于连接结构限定，本申请以光束的出光方向为参考进行部件的位置限定。本说明书所使用的术语“上”、“下”、“左”、“右”、“竖直”、“水平”以及类似的表述只是为了说明的目的。为了便于连接结构限定，本申请以光束从俯视方向上入射到分光装置的方向为参考进行部件的位置限定。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本说明书中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
此外，下面所描述的本申请各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
为了解决现有的汽车抬头显示装置中，无法对投影图像的尺寸和虚像距离进行调节的问题，本申请实施例提供了一种投影光学系统，其双远心镜头灵活调节图像的尺寸，通过成像镜头灵活调节图像的虚像距离，能够应用于不同类型的汽车的抬头显示装置中，且成像效果好、体积小、成本低。
图1为本申请实施例提供的投影光学系统的其中一种应用环境的示意图，图2为图1所示应用场景中前挡风玻璃的成像图。其中，该应用 环境中包括：汽车1，所述汽车1包括：前挡风玻璃a和抬头显示装置10。
所述抬头显示装置10中采用本申请实施例提供的投影光学系统100以实现两种图像画面的成像显示，所述投影光学系统100能够通过成像镜头110输出投影图像P1。
在本应用场景中，所述投影图像P1可以用于显示二维图像，例如，所述汽车1的驾驶信息，所述驾驶信息包括但不限于所述汽车1的车速信息，油量信息等，基于此，所述汽车1上应当相应配置有车速传感器、油量传感器等，具体地，所述二维图像的设置、所述汽车1的驾驶信息的设置以及相应的传感器设置可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
或者，在本应用场景中，所述投影图像P1还可以用于显示三维图像，也即是AR画面，例如，所述汽车1所在道路的路况信息，所述路况信息包括但不限于所述汽车1所在道路上的车道、道路标线、斑马线、障碍物、红绿灯、指示牌等，基于此，所述汽车1上应当相应配置有摄像头、激光雷达等检测设备，进一步地，若所述汽车1能够实现导航功能，还可以将导航指示信息叠加在所述路况信息上一起显示，具体地，所述三维图像的设置、所述汽车1所在道路的路况信息以及相应的检测设备的设置可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
在本应用场景中，所述前挡风玻璃a优选能够清晰成像且透光度好的玻璃材料制成，具体地，可根据实际需要进行选择，不需要拘泥于本申请应用场景的限定。
具体地，下面结合附图，对本申请实施例作进一步阐述。
实施例一
本申请实施例提供了一种投影光学系统，能够应用于如上述应用场景所述的汽车的抬头显示装置，请一并参见图3、图4和图5，其中，图3是本申请提供的一种投影光学系统的结构，图4是图3所示投影光学系统结构的光路图，图5是本申请实施例提供的一种投影光学系统的电气连接结构框图，所述投影光学系统100包括：成像镜头110、图像生成单元120、第一反射单元130、双远心镜头140、第二反射单元150、控制器160、第一驱动装置171、第二驱动装置172。
所述图像生成单元120，用于出射包含投影图像的图像信息的光束；所述图像生成单元120为DLP(Digital Light Processing)显示芯片或者LCOS(Liquid Crystalon Silicon，硅基液晶)显示芯片。在本申请实施例中，所述图像生成单元120还包括有效面121和保护玻璃122。在其他的一些实施例中，所述图像生成单元120也可以是DMD(数字微镜器件，Digital Micromirror Device)显示芯片等其他的图像显示芯片，具体地，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述第一反射单元130，其入光侧设置在所述图像生成单元120的出光方向上；所述第一反射单元130为转向棱镜，其呈第一预设角度设置在所述图像生成单元120和所述双远心镜头140之间，所述第一反射单元130所采用的转向棱镜可以为全内反射棱镜TIR，以实现对光束的全部反射。在图4所示实施例中，所述第一反射单元130采用的是直角三棱镜，其一直角面与所述图像生成单元120相对，其另一直角面与所述双远心镜头140相对，所述第一反射单元130的斜面的反射角度为90度，也即是所述第一反射单元130的第一预设角度为45度，其呈所述预设角度设置在所述光路中，在其他的一些实施例中，所述第一反射单 元130的型号及材料等的选择、以及所述第一预设角度的设置，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述双远心镜头140，其入光侧设置在所述第一反射单元130的反光侧的出光方向上。进一步地，所述双远心镜头140包括第一折射透镜组141和第二折射透镜组142，所述控制器160配置为通过控制所述双远心镜头140中所述第一折射透镜组141和所述第二折射透镜组142的位置，以调整所述投影图像的尺寸；所述第一驱动装置171，其分别与所述控制器160和所述双远心镜头140连接，用于根据所述控制器160下发的控制指令驱动所述第一折射透镜组141和所述第二折射透镜组142对其出光的图像尺寸进行调整。所述第一折射透镜组141的光焦度为15mm，所述第一折射透镜组141的焦距为8.6mm；所述第二折射透镜组142的光焦度为8mm，所述第二折射透镜组142的焦距为6mm。具体地，所述第一折射透镜组141和/或所述第二折射透镜组142可以是单一一个镜片，也可以是由多个镜片组成的镜片组，其也可以包含其他的光学器件，在实际使用场景中，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。需要说明的是，所述第一折射透镜组141和/或所述第二折射透镜组142的光焦度和焦距仅为本申请图4所示实施例软件模拟得到的一种设计参数，在实际情况中，根据光束传播路径的不同，所述第一折射透镜组141和/或所述第二折射透镜组142的具体设计参数也可以根据软件模拟得到其他参数，本申请实施例提供的例子不用于对所述第一折射透镜组141和/或所述第二折射透镜组142实际模拟或生产时的设计参数做任何限定。
所述第二反射单元150，其入光侧设置在所述双远心镜头140的出光侧的出光方向上；所述第二反射单元150为反射镜，其呈第二预设角度设置在所述双远心镜头140和所述成像镜头110之间，所述第二反射 单元150还可以包括镀设在所述反射镜上的增反膜，以实现对光束的全部反射。在图4所示实施例中，所述第二反射单元150的斜面的反射角度为90度，也即是所述第二反射单元150的所述第二预设角度为45度，其呈所述预设角度设置在所述光路中，在其他的一些实施例中，所述第二反射单元150的型号及材料等的选择、以及所述第二预设角度的设置，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
所述成像镜头110，其入光侧设置在所述第二反射单元150的反光侧的出光方向上；所述成像镜头110的光焦度为40mm，所述成像镜头110的焦距为24mm。具体地，所述成像镜头110可以是单一一个镜片，也可以是由多个镜片组成的镜片组，其也可以包含其他的光学器件，在实际使用场景中，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。需要说明的是，所述成像镜头110的光焦度和焦距仅为本申请图4所示实施例软件模拟得到的一种设计参数，在实际情况中，根据光束传播路径的不同，所述成像镜头110的具体设计参数也可以根据软件模拟得到其他参数，本申请实施例提供的例子不用于对所述成像镜头110实际模拟或生产时的设计参数做任何限定。
所述控制器160，其分别与所述图像生成单元120、所述双远心镜头140和所述成像镜头110连接，用于控制所述图像生成单元120所出射的图像的出光，调整所述双远心镜头140以调整成像尺寸，调整成像镜头110以调整成像距离；所述控制器160可以是各类常用于光学投影、能够发送控制指令的处理器、服务器等具备计算功能的芯片、模块、单元、装置和/或设备，进一步地，所述控制器160还可以具有与外界的通信功能和/或接受用户手势动作或指令等投影设备通常具有的计算和/或控制功能等，具体地，可根据实际需要选择相应的控制器160，不需要拘泥于本申请实施例的限定。
如上述应用场景所述，所述汽车1还包括前挡风玻璃a，在所述投影光学系统100中，所述成像镜头110的中继像P1成像在所述前挡风玻璃a上。在本申请实施例中，所述控制器160还与所述成像镜头110连接，所述控制器160配置为通过控制所述成像镜头110的位置，以调整所述投影图像P1在所述前挡风玻璃a成像时的虚像距离。具体地，所述第二驱动装置172，其分别与所述控制器160和所述成像镜头110连接，用于根据所述控制器160下发的控制指令驱动所述成像镜头110对其出光的成像位置进行调整。
采用本申请实施例提供的投影光学系统进行双图像的显示时，以图1及图2所示应用场景为例，所述图像生成单元120播放投影图像P1的图像信息，出射光束，光束经过第一反射单元130反射后进入双远心镜头140中，然后通过第二反射单元150反射进入成像镜头110中出射后投影在汽车1的前挡风玻璃a显示投影图像P1。进一步地，还可以通过调整所述成像镜头110的焦距、位置甚至替换不同倍率的镜片等方式来调整所呈现在前挡风玻璃a上的虚像的距离。进一步地，还可以通过调整所述双远心镜头140中第一折射透镜组141和/或第二折射透镜组142的焦距、位置甚至替换不同倍率的镜片等方式来调整所呈现在前挡风玻璃a上的虚像的尺寸。
需要说明的是，第一驱动装置171和/或第二驱动装置172可以是采用机械的方式分别驱动所述双远心镜头140和/或所述成像镜头110，也可以是采用软件驱动的方式分别驱动所述双远心镜头140和/或所述成像镜头110，或者，还可以是采用软硬结合的方式分别驱动所述双远心镜头140和/或所述成像镜头110，例如，可以采用伺服/马达/电机驱动，或者，通过所述控制器160与服务器/系统/电子设备等有线/无线连接的方式实现软件驱动，或者，采用开关管/开关电路驱动等，具体 地，可根据实际需要进行设置，不需要拘泥于本申请实施例的限定。
实施例二
本申请实施例提供了一种汽车的抬头显示装置，该汽车可以是如上述应用场景所述的汽车10，该抬头显示装置可以是如上述应用场景所述的抬头装置，请参见图6，其示出了本申请实施例提供的一种汽车的抬头显示装置10的结构，所述抬头显示装置10包括如上述实施例一所述的投影光学系统100，所述投影光学系统100能够将所述投影图像P1投影在所述汽车10的前挡风玻璃a上实现成像。
需要说明的是，所述投影光学系统100的具体结构如上述实施例一所述，具体请参见上述实施例一种对于所述投影光学系统100的描述，此处不再详述。
本申请实施例中提供了一种应用于汽车的抬头显示装置的投影光学系统，其包括按出光方向依次设置的图像生成单元、第一反射单元、双远心镜头、第二反射单元和成像镜头，所述双远心镜头配置为可用于调整所述投影图像的尺寸，所述成像镜头配置为可用于调整所述投影图像的虚像距离，并输出所述投影图像的光束以实现投影成像，本申请实施例提供的投影光学系统可通过所述双远心镜头灵活调节图像的尺寸，通过成像镜头灵活调节图像的虚像距离，能够应用于不同类型的汽车的抬头显示装置中，且成像效果好、体积小、成本低。
需要说明的是，以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中 的部分或者全部模块来实现本实施例方案的目的。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (10)

  1. 一种投影光学系统，其特征在于，应用于汽车的抬头显示装置，所述系统包括：
    图像生成单元，用于出射包含投影图像的图像信息的光束；
    第一反射单元，其入光侧设置在所述图像生成单元的出光方向上；
    双远心镜头，其入光侧设置在所述第一反射单元的反光侧的出光方向上，所述双远心镜头配置为可用于调整所述投影图像的尺寸；
    第二反射单元，其入光侧设置在所述双远心镜头的出光侧的出光方向上；
    成像镜头，其入光侧设置在所述第二反射单元的反光侧的出光方向上，所述成像镜头配置为可用于调整所述投影图像的虚像距离，并输出所述投影图像的光束以实现投影成像。
  2. 根据权利要求1所述的投影光学系统，其特征在于，
    所述双远心镜头包括第一折射透镜组和第二折射透镜组，所述投影光学系统还包括：
    控制器，其配置为通过控制所述双远心镜头中所述第一折射透镜组和所述第二折射透镜组的位置，以调整所述投影图像的尺寸。
  3. 根据权利要求2所述的投影光学系统，其特征在于，所述投影光学系统还包括：
    第一驱动装置，其分别与所述控制器和所述双远心镜头连接，用于根据所述控制器下发的控制指令驱动所述双远心镜头对其出光的图像尺寸进行调整。
  4. 根据权利要求3所述的投影光学系统，其特征在于，
    所述汽车还包括前挡风玻璃，所述前挡风玻璃为漫射体，在所述投影光学系统中，所述成像镜头的中继像成像在所述前挡风玻璃上，所述投影光学系统还包括：
    第二驱动装置，其分别与所述控制器和所述成像镜头连接，用于根据所述控制器下发的控制指令驱动所述成像镜头对其出光的成像位置进行调整。
  5. 根据权利要求4所述的投影光学系统，其特征在于，
    所述第一反射单元为转向棱镜，其呈第一预设角度设置在所述图像生成单元和所述双远心镜头之间。
  6. 根据权利要求5所述的投影光学系统，其特征在于，
    所述第二反射单元为反射镜，其呈第二预设角度设置在所述双远心镜头和所述成像镜头之间。
  7. 根据权利要求6所述的投影光学系统，其特征在于，
    所述成像镜头的光焦度为40mm，所述成像镜头的焦距为24mm。
  8. 根据权利要求7所述的投影光学系统，其特征在于，
    所述第一折射透镜组的光焦度为15mm，所述第一折射透镜组的焦距为8.6mm；
    所述第二折射透镜组的光焦度为8mm，所述第二折射透镜组的焦距为6mm。
  9. 根据权利要求8所述的投影光学系统，其特征在于，
    所述图像生成单元为DLP显示芯片或者LCOS显示芯片。
  10. 一种汽车的抬头显示装置，其特征在于，包括：如上述权利要求1-9任一项所述的投影光学系统，所述投影光学系统能够将图像投影在所述汽车的前挡风玻璃上实现成像。
PCT/CN2021/083363 2020-12-28 2021-03-26 一种投影光学系统及汽车的抬头显示装置 WO2022141853A1 (zh)

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