WO2019126951A1 - 激光束扫描显示设备及增强现实眼镜 - Google Patents

激光束扫描显示设备及增强现实眼镜 Download PDF

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Publication number
WO2019126951A1
WO2019126951A1 PCT/CN2017/118328 CN2017118328W WO2019126951A1 WO 2019126951 A1 WO2019126951 A1 WO 2019126951A1 CN 2017118328 W CN2017118328 W CN 2017118328W WO 2019126951 A1 WO2019126951 A1 WO 2019126951A1
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WIPO (PCT)
Prior art keywords
laser
signal
display device
primary color
lens
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PCT/CN2017/118328
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English (en)
French (fr)
Inventor
王进
姜滨
Original Assignee
歌尔科技有限公司
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Publication date
Application filed by 歌尔科技有限公司 filed Critical 歌尔科技有限公司
Priority to US16/073,692 priority Critical patent/US11372244B2/en
Priority to EP17893501.1A priority patent/EP3734350A4/en
Priority to JP2018540105A priority patent/JP2020507094A/ja
Priority to PCT/CN2017/118328 priority patent/WO2019126951A1/zh
Priority to KR1020187022046A priority patent/KR20190087977A/ko
Publication of WO2019126951A1 publication Critical patent/WO2019126951A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning 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
    • 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
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • 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
    • G02B27/10—Beam splitting or combining 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
    • G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/10—Electronic devices other than hearing aids
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T19/00—Manipulating 3D models or images for computer graphics
    • G06T19/006—Mixed reality
    • 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
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type

Definitions

  • the present invention relates to the field of image display technologies, and in particular, to a laser beam scanning display device and an augmented reality glasses.
  • Augmented Reality (AR) technology is a technology that can generate virtual images that do not exist in the real world by computer vision technology and display the virtual images in the real world. Using this technology, virtual images and real objects can be displayed simultaneously on the display screen, providing users with a novel form of viewing.
  • AR Augmented Reality
  • the display component used in the augmented reality device in the augmented reality technology is generally composed of a light source, a scanning galvanometer, a light transmitting device, and a light reflecting device.
  • the light transmitting device and the light reflecting device are composed of a plurality of optical lenses, so that the display assembly is bulky.
  • the augmented reality device is generally an AR glasses or an AR helmet. Therefore, if a large-sized display component is disposed on an augmented reality device, the user is affected to wear the augmented reality device.
  • embodiments of the present invention provide a laser beam scanning display device and an augmented reality glasses, which are used to reduce the volume of the display device, so that it can be better applied to an augmented reality device.
  • An embodiment of the present invention provides a laser beam scanning display device, including:
  • a focusing lens a laser emitter located at a focus of the focusing lens, a beam combiner, a microelectromechanical component, and a projection lens;
  • the laser emitter is configured to emit three primary color laser signals
  • the beam combiner is configured to reflect a concentrated laser signal obtained by concentrating the three primary color laser signals by the focusing lens to the MEMS assembly;
  • the MEMS component is configured to scan the received concentrating laser signal to generate content to be displayed, and display the content to be displayed on the lens of the augmented reality glasses through the projection lens.
  • the device further includes:
  • a safety monitoring component connected to the laser emitter, configured to control an operating state of the laser emitter according to the acquired signal power of each of the three primary color laser signals.
  • the security monitoring component is specifically configured to:
  • the device further includes:
  • a first driver connected to the laser emitter for driving the laser emitter to cause the laser emitter to color according to three color channels respectively corresponding to the three primary colors of each pixel in the content to be displayed a value that determines the number of times of illumination within a preset time period;
  • a second driver coupled to the MEMS assembly for driving the micromotor assembly in response to receiving the concentrated laser signal.
  • the device further includes:
  • a controller respectively connected to the first driver and the second driver for generating a first driving signal and a second driving signal for driving the first driver and the second driver, respectively.
  • the content to be displayed is a video
  • the device further includes:
  • transcoder connected to the controller, configured to perform transcoding processing on the original video content to generate transcoded video content corresponding to the to-be-displayed content.
  • the device further includes:
  • a first memory connected to the transcoder for storing the transcoded video content
  • a second memory coupled to the transcoder for storing the original video content.
  • the controller is further configured to: send an angle adjustment instruction to the MEMS component;
  • the microelectromechanical assembly is configured to adjust an angle of a mirror configured in the MEMS component according to a preset adjustment angle included in the angle adjustment instruction, so that the MEMS component according to a preset shape and a preset scan
  • the method scans the convergence signal.
  • controller is further configured to:
  • the adjustment angle of the mirror is calibrated according to the preset adjustment angle and the error angle.
  • An embodiment of the present invention provides an augmented reality glasses, including a lens, a glasses holder for fixing the lens, and any of the laser beam scanning display devices described above, wherein
  • the laser beam scanning display device is disposed outside the glasses holder;
  • the lens is the screen.
  • the laser beam scanning display device and the augmented reality glasses include a focusing lens, a laser emitter located at a focus of the focusing lens, a beam combiner, a microelectromechanical component, and a projection lens.
  • the laser emitter in the laser beam scanning display device emits the three primary color laser signals through the focusing lens, and irradiates the three primary color laser signals into the beam combiner through the focusing lens, and the beam synthesizer can converge the red, green and blue three-way primary color laser signals into one concentrated laser signal. And reflecting this concentrated laser signal to the MEMS component.
  • the micromotor assembly scans the received concentrated laser signal to generate content to be displayed.
  • the projection lens displays the content to be displayed generated after scanning on the lens of the augmented reality glasses. It can be seen that, in the above laser beam scanning display device, after the convergence signal is generated, the content to be displayed generated by the MEMS component can be directly displayed on the lens of the augmented reality glasses through the projection lens, and is not required between the MEMS component and the projection lens. Any reflection or transmission device of a laser signal, since the device for reflecting or transmitting the laser signal is usually composed of a plurality of mirrors or transmission mirrors, which is complicated in structure and large in volume, the laser beam scanning display device provided by the present invention is removed. The large-volume laser signal reflection or transmission device, that is, the volume of the laser beam scanning display device is greatly reduced, so that the laser beam scanning display device can be better applied to an augmented reality device.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of a laser beam scanning display device according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing an optional internal structure of a laser beam scanning display device according to an embodiment of the present invention
  • Embodiment 2 of a laser beam scanning display device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of Embodiment 1 of augmented reality glasses according to an embodiment of the present invention.
  • first, second, third, etc. may be used to describe XXX in embodiments of the invention, these XXX should not be limited to these terms. These terms are only used to distinguish XXX from each other.
  • first XXX may also be referred to as a second XXX without departing from the scope of the embodiments of the present invention.
  • second XXX may also be referred to as a first XXX.
  • the words “if” and “if” as used herein may be interpreted to mean “when” or “when” or “in response to determining” or “in response to detecting.”
  • the phrase “if determined” or “if detected (conditions or events stated)” may be interpreted as “when determined” or “in response to determination” or “when detected (stated condition or event) “Time” or “in response to a test (condition or event stated)”.
  • the laser beam scanning display device provided in this embodiment may include:
  • a focusing lens 11, a laser emitter 12 located at the focus of the focusing lens, a beam combiner 13, a microelectromechanical assembly 14, and a projection lens 15 are provided.
  • the laser emitter 12 can emit three primary color laser signals, wherein, optionally, the three primary color laser signals can be at least one set of three primary color laser signals, and each set of three primary color laser signals includes red, green and blue three-way laser signals.
  • the laser emitter 12 can include N laser emitting tubes, each of which can directly emit a laser signal of a preset wavelength, and the preset wavelength of the laser signal corresponds to three colors of red, green and blue. a certain color, where N ⁇ 3.
  • the laser emitter 12 may include N laser emission tubes and N frequency multiplying circuits respectively connected to the N laser emission tubes. The N frequency doubling circuits are respectively used to change the wavelength of the laser signal emitted by the laser tube to one-half wavelength.
  • the one-half wavelength obtained after the frequency doubling process may correspond to one of the three colors of red, green and blue.
  • the laser signals emitted by each of the laser emitters 12 of the different structures described above have a small signal power, which is usually lower than the 0.385 mw specified by the laser safety standard. Alternatively, in practical applications, any way The signal power of the laser signal can generally be 0.27mw, and the signal power is much smaller than the laser safety standard.
  • the laser emitter 12 described above can generally be located at the focus of the focusing lens 11, which allows the focusing lens 11 to produce an optimal focusing effect when focusing the laser signal of the same color emitted by the laser emitter 12.
  • the focus lens 11 may be a transmissive lens such as a plano-convex lens, a positive meniscus lens, an aspherical mirror or the like, or may be a reflective lens such as a reflective lens or the like.
  • the beam combiner 13 may alternatively be composed of a plurality of mirrors, and the above description of the laser emitter 12 may be followed.
  • the number of mirrors in the laser emitter 12 may be N+1, in the three primary color laser signals. Each laser signal has a corresponding mirror.
  • the laser emitter 12 includes three laser emission tubes, it is respectively used to emit a red laser signal, a green laser signal, and a blue laser signal.
  • the mirrors corresponding to the red laser signal, the green laser signal, and the blue laser signal may be the mirror 1, the mirror 2, and the mirror 3, respectively.
  • the three mirrors are used to reflect the red laser signal, the green laser signal, and the blue laser signal, respectively.
  • a mirror 4 is also provided in the beam combiner 13.
  • the mirror 4 can converge the laser signal reflected by the mirror 1, the mirror 2 and the mirror 3, that is, the beam combiner 13 converges the three primary color laser signals emitted by the laser emitter 12. Thereby a concentrated laser signal is formed.
  • the beam combiner 13 can reflect the concentrated laser signal to the MEMS assembly 14 using the mirror 4 provided by itself.
  • an optional structural schematic diagram of the laser beam scanning display device provided by this embodiment may be as shown in FIG. 2 .
  • the beam combiner 13 optionally also composed of a collimator and a mirror.
  • the collimator can be used to converge the three primary color laser signals emitted by the laser emitter 12 to form a concentrated laser signal, and the beam combiner 13 can reflect the concentrated laser signals to the MEMS assembly 14 by using the mirror 4 provided by itself.
  • the MEMS assembly 14 After the MEMS assembly 14 receives the concentrated laser signal, the MEMS assembly 14 can reflect the condensed laser signal into the projection lens 15. Since the MEMS assembly 14 is a component that can adjust its angle in a preset manner, the position of the condensed laser signal received by the projection lens 15 on the projection lens 15 will vary depending on the angle of the MEMS assembly 14 itself. The change occurs, that is, the MEMS component 14 completes the scanning of the convergence signal to generate the content to be displayed. Alternatively, the scanning method may be progressive scanning or interlaced scanning.
  • the laser beam scanning display device uses the projection lens 15 to display the scanned content to be displayed on the screen.
  • the screen is a lens of the AR glasses; when the augmented reality device is an AR helmet, the screen is AR at this time.
  • the laser beam scanning display device includes a focusing lens, a laser emitter located at the focus of the focusing lens, a beam combiner, a microelectromechanical component, and a projection lens.
  • the laser emitter in the laser beam scanning display device emits the three primary color laser signals through the focusing lens, and irradiates the three primary color laser signals into the beam combiner through the focusing lens, and the beam synthesizer can converge the red, green and blue three-way primary color laser signals into one concentrated laser signal. And reflecting this concentrated laser signal to the MEMS component.
  • the micromotor assembly scans the received concentrated laser signal to generate content to be displayed.
  • the projection lens displays the content to be displayed generated after scanning to the screen.
  • the content to be displayed generated by the MEMS component can be directly displayed on the lens of the augmented reality glasses through the projection lens, and is not required between the MEMS component and the projection lens.
  • Any reflection or transmission device of a laser signal since the device for reflecting or transmitting the laser signal is usually composed of a plurality of mirrors or transmission mirrors, which is complicated in structure and large in volume, the laser beam scanning display device provided by the present invention is removed.
  • the large-volume laser signal reflection or transmission device that is, the volume of the laser beam scanning display device is greatly reduced, so that the laser beam scanning display device can be better applied to an augmented reality device.
  • FIG. 3 is a schematic structural diagram of Embodiment 2 of a laser beam scanning display device according to an embodiment of the present invention. As shown in FIG. 3, based on the embodiment shown in FIG. 1, optionally, the embodiment provides The laser beam scanning display device may also include a safety monitoring assembly 21 coupled to the laser transmitter 12.
  • the laser transmitter 12 emits a laser signal to the safety monitoring component 21, and after receiving the three primary color laser signals, the safety monitoring component 21 acquires the signal power of each of the three primary color laser signals, and controls the laser emitter 12 according to the magnitude of the signal power.
  • Working status the safety monitoring component 21 acquires the signal power of each of the three primary color laser signals, and controls the laser emitter 12 according to the magnitude of the signal power.
  • control rule for controlling the working state of the laser emitter 12 may be specifically: if the signal power of each laser signal in the three primary color laser signals is less than or equal to the preset safety power, the laser emitter 12 is controlled to emit the three primary color laser signals. So that the focus lens 11 can receive the three primary color laser signals. If the signal power of any of the three primary color laser signals is greater than the preset safety power, it indicates that the signal power of the laser signal is too large, and viewing in this case may cause damage to the user's eyes. At this time, the safety monitoring component 21 The laser emitter 12 is controlled to stop emitting the three primary color laser signals.
  • the laser beam scanning display device may further include: a first driver 22 connected to the laser emitter 12.
  • the first driver 22 is for driving the laser emitter 12 after receiving the first drive signal.
  • the laser emitter 12 then emits the three primary color laser signals.
  • the laser beam scanning display device may further include: a second driver 23 connected to the MEMS assembly 14.
  • the second driver 23 is specifically configured to drive the MEMS component 14 after receiving the second driving signal.
  • the laser emitter 12 can emit three primary color laser signals.
  • each of the three primary color laser signals emits light within a preset period of time.
  • the laser signal is not continuously illuminated, but is intermittently illuminated, that is, within a predetermined period of time, the laser emitter 12 controls each laser signal to emit light several times.
  • the content to be displayed generated by the MEMS component 14 can be understood as one or more frames of images, and any pixel in any frame image has different RGB values.
  • the number of times of the red laser signal, the green laser signal, and the blue laser signal in the three primary color laser signals emitted by the laser emitter 12 in the preset time period respectively correspond to the R value, the G value, and the B value of the pixel.
  • the laser emitting tube for emitting the red, green, and blue laser signals in the laser emitter 12 emits light 242 times in a preset time period. , 156 times, 177 times. That is to say, the beam combiner 13 can generate a concentrated laser signal of a different color after concentrating the laser signals of different number of times of illumination.
  • the MEMS assembly 14 can generate the content to be displayed by scanning the concentrated laser signals of different colors.
  • the laser beam scanning display device may further include: a controller 24 connected to the first driver 22 and the second driver 23, respectively.
  • the controller 24 is configured to generate a first driving signal and a second driving signal for driving the first driver 22 and the second driver 23, respectively.
  • the laser beam scanning display device may further include: a transcoder 25 connected to the controller 24.
  • the transcoder 25 is used to convert the data format of the original video content into a data format suitable for the laser beam scanning display device, that is, to generate the transcoded video content.
  • the first driving signal and the second driving signal involved above may be generated based on a transcoding process.
  • the controller 24 may respectively transmit the first driving signal and the second driving signal to the first driver 22 and the second driver 23 after the transcoder 25 completes the transcoding process.
  • the controller 24 may further transmit the first driving signal and the second driving signal to the first driver 22 and the second driver 23 after the transcoder 25 transcoding process starts.
  • the laser beam scanning display device can conveniently display the content device to manage the video content by setting a separate storage space. Therefore, optionally, the laser beam scanning display device may further include a first memory 26 connected to the transcoder 25 and a second memory 27 connected to the transcoder 25.
  • the first memory 26 is configured to store the transcoded video content.
  • the second memory 27 is used to store the original video content before transcoding.
  • the micro-electromechanical assembly 14 is a component that can adjust its angle according to a preset manner.
  • a mirror is disposed in the MEMS assembly 14 and, in general, the angle of the mirror can be considered as the angle of the MEMS assembly 14.
  • the controller 24 in the laser beam scanning display device is further configured to: adjust the angle of the mirror configured in the MEMS assembly 14 according to the preset adjustment angle included in the angle adjustment instruction, so that the MEMS The component 14 can adjust the angle according to the preset, and then scan the convergence signal according to the preset shape and the preset scanning manner.
  • the angle adjustment instruction may be sent to the MEMS assembly 14 at a preset time interval.
  • the preset shape may be a conical shape
  • the preset scanning mode may be an interlaced scanning, so that the scanning from the center point to the outside can be performed to make the center point image clearest, and meet the needs of human eye focusing.
  • the preset scanning mode may also be a progressive scanning.
  • the error of the MEMS component 14 can be understood as the error of the mirror configured in the MEMS assembly 14, that is, the actual adjustment angle of the mirror is inconsistent with the preset adjustment angle in the angle adjustment command. This affects the display effect of the MEMS component 14 scanning the generated content to be displayed. If the error is too large, there may even be cases where the image to be displayed cannot be viewed.
  • the controller 24 in the laser beam scanning display device is also used to:
  • the adjustment angle of the mirror is calibrated according to the preset adjustment angle and the error angle.
  • the controller 24 acquires the current angle of the mirror after the angle adjustment after each adjustment of the angle of the mirror. If the current angle of the mirror is angle 1, at the same time, after the controller 24 issues an angle adjustment command, the mirror continues to adjust the angle of the mirror according to the preset adjustment angle included in the angle adjustment command based on the angle 1. To get an angle of 2. The difference between angle 2 and angle 1 is the actual adjustment angle of the mirror. Then use the actual adjustment angle and the preset adjustment angle to calculate the error angle between the two.
  • Controller 24 can send this error angle to MEMS assembly 14, which records this error angle. After the controller 24 sends the angle adjustment command to the MEMS assembly 14 again, the mirror in the MEMS assembly 14 can adjust the angle of the mirror according to the preset adjustment command and the calculated error angle, that is, the pair is realized. Adjust the calibration of the angle.
  • the laser beam scanning display device further includes a safety monitoring component, by determining whether the signal power of each laser signal emitted by the laser emitter is greater than a preset safety power, and the signal of the laser signal When the power is too large, the laser emitter is controlled to stop emitting the laser signal, thereby achieving the effect of protecting the eyes of the user.
  • the laser beam scanning display device when the type of the display content is video, the laser beam scanning display device further comprises two independent first memories and second memories for storing video content of different processing stages, so that the laser beam scanning display device is different for different processing stages. Management of video content.
  • the laser beam scanning display device further includes a controller for calibrating the adjustment angle of the MEMS component to ensure that the MEMS component can generate a complete and well-viewed content to be displayed.
  • FIG. 4 is a schematic structural diagram of Embodiment 1 of the augmented reality glasses according to an embodiment of the present invention.
  • the augmented reality glasses include: a lens holder, a lens holder for fixing a lens, and a laser beam scanning display device according to the above embodiment.
  • the laser beam scanning display device is disposed outside the glasses holder, and the lens is a screen.
  • the positional relationship between the laser beam scanning display device and the lens of the augmented reality glasses can be as shown in FIG.
  • the distance between the laser beam scanning display device and the lens can also be changed according to different usage requirements.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

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Abstract

一种激光束扫描显示设备及增强现实眼镜，包括：聚焦透镜（11）、位于聚焦透镜（11）焦点上的激光发射器（12）、光束合成器（13）、微机电组件（14）以及投影镜头（15）。激光发射器（12）发出三原色激光信号，通过聚焦透镜（11）将三原色激光信号照射到光束合成器（13）。光束合成器（13）将三原色激光信号会聚成会聚激光信号，并将此会聚激光信号发射至微机电组件（14）。微机电组件（14）对接收到的会聚激光信号进行扫描，以生成待显示内容。投影镜头（15）将扫描后产生的待显示内容显示到屏幕上。激光束扫描显示设备将微机电组件（14）产生的待显示内容通过投影镜头（15）显示到镜片上，不需要任何激光信号的反射或透射装置，减小设备的体积，使激光束扫描显示设备可以更好的与增强现实眼镜配合使用。

Description

激光束扫描显示设备及增强现实眼镜 技术领域
本发明涉及图像显示技术领域，尤其涉及一种激光束扫描显示设备及增强现实眼镜。
背景技术
增强现实(Augmented Reality，简称AR)技术是一种可以借助计算机视觉技术产生现实世界中不存在的虚拟图像，并将此虚拟图像显示在现实世界中的技术。利用这种技术可以在显示屏幕上将虚拟图像和现实物体同时显示，为用户提供一种新颖的观看形式。
现有技术中，应用于增强现实技术中增强现实设备中的显示组件一般是由光源、扫描振镜、光线透射装置以及光线反射装置组成的。并且光线透射装置以及光线反射装置都是由多种的光学透镜组成，使得显示组件的体积较大。在实际应用中，增强现实设备一般是AR眼镜或者AR头盔。因此，若将体积较大的显示组件配置在增强现实设备上，则会影响用户佩戴增强现实设备。
发明内容
有鉴于此，本发明实施例提供一种激光束扫描显示设备及增强现实眼镜，用以减小显示设备的体积，使其可以更好地应用于增强现实设备上。
本发明实施例提供一种激光束扫描显示设备，包括：
聚焦透镜、位于所述聚焦透镜焦点上的激光发射器、光束合成器、微机电组件以及投影镜头；
所述激光发射器，用于发射三原色激光信号；
所述光束合成器，用于将通过所述聚焦透镜对所述三原色激光信号进行会聚后得到的会聚激光信号反射至所述微机电组件；
所述微机电组件，用于对接收到的所述会聚激光信号进行扫描，以生成待显示内容，通过所述投影镜头将所述待显示内容显示在增强现实眼镜的镜片上。
可选地，所述设备还包括：
与所述激光发射器连接的安全监测组件，用于根据获取到的所述三原色激光信号中每路激光的信号功率控制所述激光发射器的工作状态。
可选地，所述安全监测组件具体用于：
若所述三原色激光信号中每路激光信号的信号功率都小于或等于预设安全功率，则控制所述激光发射器发射所述三原色激光信号；
若所述三原色激光信号中任一路激光信号的信号功率大于所述预设安全功率，则控制所述激光发射器停止发射所述三原色激光信号。
可选地，所述设备还包括：
与所述激光发射器连接的第一驱动器，用于驱动所述激光发射器，以使所述激光发射器根据所述待显示内容中各个像素点在三原色分别对应的三个颜色通道中的颜色值，确定在预设时间段内的发光次数；
与所述微机电组件连接的第二驱动器，用于根据接收到所述会聚激光信号驱动所述微电机组件。
可选地，所述设备还包括：
分别与所述第一驱动器以及所述第二驱动器连接的控制器，用于产生第一驱动信号和第二驱动信号，用以分别驱动所述第一驱动器和所述第二驱动器。
可选地，所述待显示内容类型为视频，所述设备还包括：
与所述控制器连接的转码器，用于对原始视频内容进行转码处理，以生成与所述待显示内容对应的转码后视频内容。
可选地，所述设备还包括：
与所述转码器连接的第一存储器，用于存储所述转码后视频内容；
与所述转码器连接的第二存储器，用于存储所述原始视频内容。
可选地，所述控制器还用于：向所述微机电组件发送角度调整指令；
所述微机电组件，用于根据所述角度调整指令中包括的预设调整角度调整所述微机电组件中配置的反射镜的角度，以使所述微机电组件按照预设形状以及预设扫描方式对所述会聚信号进行扫描。
可选地，所述控制器还用于：
计算所述反射镜的实际调整角度与所述预设调整角度之间的误差角度；
根据所述预设调整角度以及所述误差角度校准所述反射镜的调整角度。
本发明实施例提供一种增强现实眼镜，包括镜片、固定所述镜片的眼镜支架以及上述涉及的激光束扫描显示设备中的任一种，其中，
所述激光束扫描显示设备设置在所述眼镜支架的外侧；
所述镜片为所述屏幕。
本发明实施例提供的激光束扫描显示设备及增强现实眼镜，激光束扫描显示设备包括聚 焦透镜、位于聚焦透镜焦点上的激光发射器、光束合成器、微机电组件以及投影镜头。激光束扫描显示设备中的激光发射器在发出三原色激光信号后，通过聚焦透镜将三原色激光信号照射到光束合成器中，光束合成器可以将红绿蓝三路三原色激光信号会聚成一路会聚激光信号，并将此会聚激光信号反射至微机电组件。微电机组件对接收到的会聚激光信号进行扫描，以生成待显示内容。投影镜头将扫描后产生的待显示内容显示在增强现实眼镜的镜片上。可见，上述激光束扫描显示设备中，在产生会聚信号后，可以直接将微机电组件产生的待显示内容通过投影镜头显示在增强现实眼镜的镜片上，在微机电组件与投影镜头之间不需要任何激光信号的反射或者透射装置，由于用于反射或者透射激光信号的装置通常是由多个反射镜或透射镜组成的，结构复杂并且体积大，因此，本发明提供的激光束扫描显示设备去除了此大体积的激光信号反射或者透射装置，也即是大大减小了激光束扫描显示设备的体积，使此激光束扫描显示设备可以更好地应用于增强现实设备上。
附图说明
图1为本发明实施例提供的激光束扫描显示设备实施例一的结构示意图；
图2为本发明实施例提供的激光束扫描显示设备一种可选地内部结构示意图；
图3为本发明实施例提供的激光束扫描显示设备实施例二的结构示意图；
图4为本发明实施例提供的增强现实眼镜实施例一的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义，“多种”一般包含至少两种，但是不排除包含至少一种的情况。
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应当理解，尽管在本发明实施例中可能采用术语第一、第二、第三等来描述XXX，但这些XXX不应限于这些术语。这些术语仅用来将XXX彼此区分开。例如，在不脱离本发明实施例范围的情况下，第一XXX也可以被称为第二XXX，类似地，第二XXX也可以被称为第一XXX。
取决于语境，如在此所使用的词语“如果”、“若”可以被解释成为“在……时”或“当……时”或“响应于确定”或“响应于检测”。类似地，取决于语境，短语“如果确定”或“如果检测(陈述的条件或事件)”可以被解释成为“当确定时”或“响应于确定”或“当检测(陈述的条件或事件)时”或“响应于检测(陈述的条件或事件)”。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的商品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种商品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的商品或者系统中还存在另外的相同要素。
图1为本发明实施例提供的激光束扫描显示设备实施例一的结构示意图，如图1所示，本实施例提供的该激光束扫描显示设备可以包括：
聚焦透镜11、位于聚焦透镜焦点上的激光发射器12、光束合成器13、微机电组件14以及投影镜头15。
激光发射器12可以发射三原色激光信号，其中，可选地，三原色激光信号可以为至少一组三原色激光信号，每一组三原色激光信号包括红绿蓝三路激光信号。可选地，激光发射器12中可以包括N个激光发射管，每个激光发射管都可以直接发射出预设波长的激光信号，并且激光信号的预设波长对应于红绿蓝三种颜色中某种颜色，其中，N≥3。可选地，激光发射器12中可以包括N个激光发射管以及分别与N个激光发射管连接的N个倍频电路。N个倍频电路分别用于将激光发射管发射的激光信号的波长变为二分之一波长。经过倍频处理后得到的二分之一波长可以对应于红绿蓝三种颜色中的某种颜色。并且上述不同结构的激光发射器12中每个激光发射管发射出的激光信号都具有较小的信号功率，通常低于激光安全标准规定的0.385mw，可选地，在实际应用中，任一路激光信号的信号功率一般可以为0.27mw，信号功率远小于激光安全标准的规定。
上述激光发射器12通常可以位于聚焦透镜11的焦点处，这样可以使聚焦透镜11在对激光发射器12发射出的相同颜色的激光信号进行聚焦时可以产生最佳的聚焦效果。可选地，聚焦透镜11可以是透射式透镜例如，平凸透镜、正凹凸透镜、非球面镜等等，也可以是反射式透 镜，例如反射透镜等等。
光束合成器13，可选地，可以由多个反射镜组成，承接上述对激光发射器12的相关描述，激光发射器12中反射镜的个数可以是N+1个，三原色激光信号中的每一路激光信号都有一个对应的反射镜。可选地，当激光发射器12中包括三个激光发射管时，分别用于发射红色激光信号、绿色激光信号以及蓝色激光信号。红色激光信号、绿色激光信号以及蓝色激光信号对应的反射镜可以分别为反射镜1、反射镜2以及反射镜3。这三个反射镜分别用于对红色激光信号、绿色激光信号以及蓝色激光信号进行反射。同时，光束合成器13中还设置有反射镜4。此反射镜4能够将经过反射镜1、反射镜2以及反射镜3反射后的激光信号进行会聚，也即是使光束合成器13对激光发射器12发射出的三原色激光信号进行了会聚处理，从而形成会聚激光信号。光束合成器13可以利用自身设置的反射镜4将会聚激光信号反射至微机电组件14。在这种情况下，本实施例提供的激光束扫描显示设备的一种可选的结构示意图可以如图2所示。
光束合成器13，可选地，还可以由准直器和反射镜组成。此时准直器可以用于对激光发射器12发出的三原色激光信号进行会聚，从而形成会聚激光信号，光束合成器13可以利用自身设置的反射镜4将会聚激光信号反射至微机电组件14。
在微机电组件14接收到会聚激光信号后，微机电组件14可以将会聚激光信号反射到投影镜头15中。由于微机电组件14是一个可以按照预设方式调整自身角度的组件，因此，随着微机电组件14自身角度的不同，投影镜头15接收到的会聚激光信号在投影镜头15上的位置也会随之发生变化，也即是使微机电组件14完成对会聚信号的扫描，从而生成待显示内容。可选地，扫描方式可以是逐行扫描或者隔行扫描。
最终，激光束扫描显示设备利用投影镜头15将扫描生成的待显示内容显示到屏幕上。当此激光束扫描显示设备的应用场景是与增强现实设备配合使用，并且增强现实设备为AR眼镜时，此时屏幕为AR眼镜的镜片；当增强现实设备为AR头盔时，此时屏幕为AR头盔中的配置的显示屏幕。
本实施例中，激光束扫描显示设备包括聚焦透镜、位于聚焦透镜焦点上的激光发射器、光束合成器、微机电组件以及投影镜头。激光束扫描显示设备中的激光发射器在发出三原色激光信号后，通过聚焦透镜将三原色激光信号照射到光束合成器中，光束合成器可以将红绿蓝三路三原色激光信号会聚成一路会聚激光信号，并将此会聚激光信号反射至微机电组件。微电机组件对接收到的会聚激光信号进行扫描，以生成待显示内容。投影镜头将扫描后产生的待显示内容显示到屏幕上。可见，上述激光束扫描显示设备中，在产生会聚信号后，可以直接将微机电组件产生的待显示内容通过投影镜头显示在增强现实眼镜的镜片上，在微机电 组件与投影镜头之间不需要任何激光信号的反射或者透射装置，由于用于反射或者透射激光信号的装置通常是由多个反射镜或透射镜组成的，结构复杂并且体积大，因此，本发明提供的激光束扫描显示设备去除了此大体积的激光信号反射或者透射装置，也即是大大减小了激光束扫描显示设备的体积，使此激光束扫描显示设备可以更好地应用于增强现实设备上。
当本发明提供的激光束扫描显示设备与增强现实设备配合使用时，则屏幕与人眼之间的距离会比较近。要想避免激光信号对用户眼睛造成伤害，就需要对激光信号的信号功率进行监测。基于此，图3为本发明实施例提供的激光束扫描显示设备实施例二的结构示意图，如图3所示，在图1所示实施例基础上，可选地，本实施例提供的该激光束扫描显示设备还可以包括：与激光发射器12连接的安全监测组件21。
激光发射器12会向安全监控组件21发射激光信号，安全监控组件21在接收到三原色激光信号后，会获取三原色激光信号中每路激光的信号功率，并根据信号功率的大小控制激光发射器12的工作状态。
可选地，控制激光发射器12的工作状态的控制规则具体可以为：若三原色激光信号中每路激光信号的信号功率都小于或等于预设安全功率，则控制激光发射器12发射三原色激光信号，以使聚焦透镜11可以接收到此三原色激光信号。若三原色激光信号中任一路激光信号的信号功率大于预设安全功率，表明激光信号的信号功率过大，在这种情况下进行观看则会对用户的眼睛造成损害，此时，安全监控组件21便会控制激光发射器12停止发射三原色激光信号。
可选地，该激光束扫描显示设备还可以包括：与激光发射器12连接的第一驱动器22。第一驱动器22用于在接收到的第一驱动信号之后，驱动激光发射器12。然后，激光发射器12才会发射出三原色激光信号。
可选地，该激光束扫描显示设备还可以包括：与微机电组件14连接的第二驱动器23。第二驱动器23具体用于在接收到第二驱动信号后，驱动微机电组件14。
另外，在激光发射器12被第一驱动器22驱动后，激光发射器12便可以发射出的三原色激光信号，可选地，三原色激光信号中的每一路激光信号是在预设时间段内才发光的，并且在此预设时间段内，激光信号并不是持续发光的，而是间隔发光的，也即是在一个预设时间段内，激光发射器12会控制每一路激光信号发光若干次。在实际应用中，微机电组件14生成的待显示内容可以理解为一帧或多帧图像，并且任一帧图像中的任一像素点都具有不同的RGB 值。激光发射器12发射出的三原色激光信号中的红色激光信号、绿色激光信号以及蓝色激光信号在预设时间段内的发光次数分别对应于像素点的R值、G值和B值。举例来说，若某个像素点的RGB值分别为242,156,177，则激光发射器12中用于发射红绿蓝三种颜色激光信号的激光发射管在预设时间段内的发光此时分别242次,156次,177次。也就是说，光束合成器13在对不同发光次数的激光信号进行会聚后，可以产生不同颜色的会聚激光信号。微机电组件14通过对不同颜色的会聚激光信号进行扫描，便可以生成待显示内容。
根据上述描述可知，第一驱动器22和第二驱动器23都是通过驱动信号来控制的。因此，可选地，该激光束扫描显示设备还可以包括：分别与第一驱动器22以及第二驱动器23连接的控制器24。此控制器24用于产生第一驱动信号和第二驱动信号，用以分别驱动第一驱动器22和第二驱动器23。
在实际应用中，激光束扫描显示设备中可以显示多种类型的待显示内容，例如图片、视频等等。当待显示内容的类型为视频时，可选地，该激光束扫描显示设备还可以包括：与控制器24连接的转码器25。
转码器25用于将原始视频内容的数据格式转换为适用于激光束扫描显示设备的数据格式，也即是生成转码后视频内容。可选地，上述涉及到的第一驱动信号以及第二驱动信号可以是基于转码处理而产生的。具体地，一种可选地方式：控制器24可以在转码器25完成转码处理后，向第一驱动器22和第二驱动器23分别发送第一驱动信号以及第二驱动信号。另一种可选地方式：控制器24还可以在转码器25转码处理开始后，向第一驱动器22和第二驱动器23分别发送第一驱动信号以及第二驱动信号。
同时，激光束扫描显示设备可以通过设置独立的存储空间来方便显示内容设备对视频内容进行管理。因此，可选地，该激光束扫描显示设备还可以包括与转码器25连接的第一存储器26，以及与转码器25连接的第二存储器27。
其中，第一存储器26用于存储转码后视频内容。第二存储器27用于存储转码前的原始视频内容。
根据上述实施例一中的相关描述可知，微机电组件14是一个可以按照预设方式调整自身角度的组件。微机电组件14中配置有反射镜，通常情况下，可以将此反射镜的角度看作此微机电组件14的角度。基于此，可选地，该激光束扫描显示设备中的控制器24还用于：根据角度调整指令中包括的预设调整角度调整微机电组件14中配置的反射镜的角度，以使微机电组件14可以根据预设调整角度，再按照预设形状以及预设扫描方式对会聚信号进行扫描。其中， 可选地，角度调整指令可以是以预设时间间隔发送至微机电组件14的。可选地，预设形状可以是圆锥形，预设扫描方式可以是隔行扫描，这样从中心点向外延伸进行扫描可以使中心点图像最清晰，满足人眼视觉聚焦的需求。当然，可选地，预设扫描方式也还可以是逐行扫描。
容易理解地，任何组件都会存在误差，微机电组件14也是如此。微机电组件14的误差可以理解为微机电组件14内配置的反射镜的误差，也即是反射镜的实际调整角度与角度调整指令中的预设调整角度不一致。这样就会影响微机电组件14扫描所生成的待显示内容的显示效果。如果误差过大，甚至有可能会出现待显示图像出现无法观看的情况。为了避免上述问题的出现，激光束扫描显示设备中的控制器24还用于：
首先，计算反射镜的实际调整角度与预设调整角度之间的误差角度。
进而，根据预设调整角度以及误差角度校准反射镜的调整角度。
具体地，控制器24在每次反射镜的角度发生调整后，都会获取角度调整后反射镜当前的角度。若反射镜当前的角度为角度1，同时，在控制器24发出角度调整指令之后，反射镜会在角度1的基础上根据角度调整指令中包括的预设调整角度继续对反射镜的角度进行调整，以得到角度2。角度2与角度1之间的差值即为反射镜的实际调整角度。再利用实际调整角度与预设调整角度计算出二者之间的误差角度。
控制器24可以将此误差角度发送至微机电组件14，微机电组件14记录此误差角度。当控制器24再次发送角度调整指令至微机电组件14后，微机电组件14中的反射镜可以根据预设调整指令以及前述计算得到的误差角度对反射镜的角度进行调整，也即是实现对调整角度的校准。
本实施例中，在实施例一的基础上，激光束扫描显示设备还包括安全监测组件，通过判断激光发射器发出的每一路激光信号的信号功率是否大于预设安全功率，当激光信号的信号功率过大时，则控制激光发射器停止发射激光信号，从而达到保护用户眼睛安全的效果。并且当显示内容的类型为视频时，激光束扫描显示设备还包括两个独立的第一存储器和第二存储器用于存储不同的处理阶段的视频内容，便于激光束扫描显示设备对不同处理阶段的视频内容的管理。另外，激光束扫描显示设备还包括控制器，控制器用于对微机电组件的调整角度进行校准，保证微机电组件可以生成完整、观看效果良好的待显示内容。
图4为本发明实施例提供的增强现实眼镜实施例一的结构示意图，如图4所示，该增强现实眼镜包括：镜片、固定镜片的眼镜支架以及上述实施例涉及的激光束扫描显示设备。其中， 激光束扫描显示设备设置在眼镜支架的外侧，镜片为屏幕。
一种可选地方式，此激光束扫描显示设备与增强现实眼镜的镜片之间的位置关系可以如图4所示。在实际应用中，也可以根据不同的使用需求改变激光束扫描显示设备与镜片之间的距离。
本实施例未详细描述的部分，可参考对图1-3所示实施例的相关说明。该技术方案的执行过程和技术效果参见图1-3所示实施例中的描述，在此不再赘述。
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。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助加必需的通用硬件平台的方式来实现，当然也可以通过硬件和软件结合的方式来实现。基于这样的理解，上述技术方案本质上或者说对现有技术做出贡献的部分可以以产品的形式体现出来，该计算机产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机装置(可以是个人计算机，服务器，或者网络装置等)执行各个实施例或者实施例的某些部分所述的方法。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，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发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种激光束扫描显示设备，其特征在于，包括：聚焦透镜、位于所述聚焦透镜焦点上的激光发射器、光束合成器、微机电组件以及投影镜头；
    所述激光发射器，用于发射三原色激光信号；
    所述光束合成器，用于将通过所述聚焦透镜对所述三原色激光信号进行会聚后得到的会聚激光信号反射至所述微机电组件；
    所述微机电组件，用于对接收到的所述会聚激光信号进行扫描，以生成待显示内容，通过所述投影镜头将所述待显示内容显示在增强现实眼镜的镜片上。
  2. 根据权利要求1所述的设备，其特征在于，所述设备还包括：
    与所述激光发射器连接的安全监测组件，用于根据获取到的所述三原色激光信号中每路激光的信号功率控制所述激光发射器的工作状态。
  3. 根据权利要求2所述的设备，其特征在于，所述安全监测组件具体用于：
    若所述三原色激光信号中每路激光信号的信号功率都小于或等于预设安全功率，则控制所述激光发射器发射所述三原色激光信号；
    若所述三原色激光信号中任一条激光信号的信号功率大于所述预设安全功率，则控制所述激光发射器停止发射所述三原色激光信号。
  4. 根据权利要求1至3中任一项所述的设备，其特征在于，所述设备还包括：
    与所述激光发射器连接的第一驱动器，用于驱动所述激光发射器，以使所述激光发射器根据所述待显示内容中各个像素点在三原色分别对应的三个颜色通道中的颜色值，确定在预设时间段内的发光次数；
    与所述微机电组件连接的第二驱动器，用于根据接收到所述会聚激光信号驱动所述微电机组件。
  5. 根据权利要求4所述的设备，其特征在于，所述设备还包括：
    分别与所述第一驱动器以及所述第二驱动器连接的控制器，用于产生第一驱动信号和第二驱动信号，用以分别驱动所述第一驱动器和所述第二驱动器。
  6. 根据权利要求5所述的设备，其特征在于，所述待显示内容类型为视频，所述设备还包括：
    与所述控制器连接的转码器，用于对原始视频内容进行转码处理，以生成与所述待显示内容对应的转码后视频内容。
  7. 根据权利要求6所述的设备，其特征在于，所述设备还包括：
    与所述转码器连接的第一存储器，用于存储所述转码后视频内容；
    与所述转码器连接的第二存储器，用于存储所述原始视频内容。
  8. 根据权利要求5至7中任一项所述的设备，其特征在于，所述控制器还用于：向所述微机电组件发送角度调整指令；
    所述微机电组件，用于根据所述角度调整指令中包括的预设调整角度调整所述微机电组件中配置的反射镜的角度，以使所述微机电组件按照预设形状以及预设扫描方式对所述会聚信号进行扫描。
  9. 根据权利要求8所述的设备，其特征在于，所述控制器还用于：
    计算所述反射镜的实际调整角度与所述预设调整角度之间的误差角度；
    根据所述预设调整角度以及所述误差角度校准所述反射镜的调整角度。
  10. 一种增强现实眼镜，其特征在于，包括镜片、固定所述镜片的眼镜支架以及如权利要求1-9任一项所述的激光束扫描显示设备；其中，
    所述激光束扫描显示设备设置在所述眼镜支架的外侧；
    所述镜片为所述屏幕。
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