WO2018014597A1 - 堆叠式显示装置 - Google Patents

堆叠式显示装置 Download PDF

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Publication number
WO2018014597A1
WO2018014597A1 PCT/CN2017/079934 CN2017079934W WO2018014597A1 WO 2018014597 A1 WO2018014597 A1 WO 2018014597A1 CN 2017079934 W CN2017079934 W CN 2017079934W WO 2018014597 A1 WO2018014597 A1 WO 2018014597A1
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WIPO (PCT)
Prior art keywords
parabolic mirror
mirror imaging
imaging unit
image
display device
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Ceased
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PCT/CN2017/079934
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English (en)
French (fr)
Inventor
陈政锡
贾甲
初大平
姚峻
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Huawei Technologies Co Ltd
Cambridge Enterprise Ltd
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Huawei Technologies Co Ltd
Cambridge Enterprise Ltd
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Publication of WO2018014597A1 publication Critical patent/WO2018014597A1/zh
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing

Definitions

  • the present application relates to the field of image display and, more particularly, to a stacked display device.
  • the display system includes a laser, a laser dilator, a Beam Splitter (BS), and a Spatial Light Modulator (SLM).
  • the first beam splitter BS1 divides the laser light generated by the laser dilator into a first beam and a second beam, and then reflects the first beam and the second beam to the first light modulator SLM1 and the second light modulator SLM2, respectively.
  • the SLM1 and the SLM2 respectively modulate the first beam and the second beam, and the first image and the second image generated after the modulation are respectively gathered by the BS3 and the BS4 to form a target image.
  • the display bandwidth is improved by synthesizing the images obtained by SLM1 and SLM2 modulation.
  • the above method often requires multiple SLMs to jointly synthesize the image to be displayed, and space limitation may not be able to design multiple SLMs in one optical path, or even multiple SLMs. Designing together can also lead to a very complex optical path system, making the entire system very bloated.
  • the present application provides a stacked display device capable of generating a target image that satisfies bandwidth requirements.
  • a stacked display device comprising: N parabolic mirror imaging units, each parabolic mirror imaging unit comprising two parabolic mirrors placed symmetrically up and down, wherein The N parabolic mirror imaging units comprise the same size of a parabolic mirror, the N being an integer greater than 1; N imaging components, the N imaging components being in one-to-one correspondence with the N parabolic mirror imaging units, Each imaging member is disposed at a preset position, the imaging member for generating an image and inputting an image to a corresponding parabolic mirror imaging unit; and a support structure for using the N parabolic mirror imaging units along the same The axes are staggered up and down, and the N parabolic mirror imaging units are disposed with a preset spacing such that the output image position of each parabolic mirror imaging unit is the same as the input image position of the adjacent upper parabolic mirror imaging unit.
  • N parabolic mirror imaging units are staggered up and down along the same axis, which may mean that the axes of the N parabolic mirror imaging units are in a straight line.
  • Different parabolic mirror imaging units are made by stacking multiple parabolic mirror imaging units together Distributed in different layers, the images output by different parabolic mirror imaging units can be combined to produce a target image that meets the bandwidth requirements. Compared with the prior art display systems with complex optical paths, the deployment is more flexible and unconstrained. Space constraints.
  • the lower parabolic mirror in each parabolic mirror imaging unit is provided with a downward first opening and the upper parabolic mirror is provided with an upward second opening .
  • Each of the parabolic mirror imaging units can receive an image from the lower parabolic mirror imaging unit through the first opening and the second opening, and output the image to the upper parabolic mirror imaging unit.
  • the arcuate edges of the second opening of each parabolic mirror imaging unit are equidistant from the axis.
  • each of the parabolic mirror imaging units is provided with a third opening on a side such that the corresponding imaging component is capable of outputting the generated image to the parabolic mirror imaging unit Image input location.
  • An image generated from the corresponding imaging member can be conveniently accessed through the third opening.
  • the first parabolic mirror imaging unit and the second parabolic mirror imaging unit are disposed in a first predetermined relative position such that the first parabolic mirror imaging unit The output image is combined with the image output by the second parabolic mirror imaging unit in a horizontal direction, wherein the first parabolic mirror imaging unit and the second parabolic mirror imaging unit are the N paraboloids Any two adjacent parabolic mirror imaging units in the mirror imaging unit.
  • the images can be combined in the horizontal direction to avoid overlapping of the images in the horizontal direction, and the display effect is better.
  • the first predetermined relative position is a horizontal viewing angle of the image output by the first parabolic mirror imaging unit and the second parabolic mirror reflection imaging The horizontal angle of view of the image output by the unit is determined.
  • the parabolic mirror imaging unit further includes a beam splitter disposed at an image input location, the beam splitter for adjusting an image output by the parabolic mirror imaging unit in a vertical The deflection angle in the straight direction enables the images output by the plurality of parabolic mirror imaging units to be combined in the vertical direction.
  • the optical splitter of the third parabolic mirror imaging unit and the optical splitter of the fourth parabolic mirror imaging unit are disposed as a second predetermined relative position such that the first The image output by the three parabolic mirror imaging unit is combined with the image output by the fourth parabolic mirror imaging unit in a vertical direction, wherein the third parabolic mirror imaging unit and the fourth parabolic mirror image The unit is any two adjacent parabolic mirror imaging units of the N parabolic mirror imaging units.
  • the beam splitter can also adjust the deflection angle of the output image in the vertical direction, which can avoid overlapping the images in the vertical direction, and the display effect is better.
  • the second predetermined relative position is a vertical viewing angle of the image output by the third parabolic mirror imaging unit and the fourth parabolic mirror The vertical angle of view of the image output by the imaging unit is determined.
  • the parabolic mirror imaging unit further includes a spectroscope disposed at an image input position, the spectroscope of the fifth parabolic mirror imaging unit and the spectroscope of the sixth parabolic mirror imaging unit being disposed as a third predetermined relative position such that the fifth parabolic mirror is imaged and outputted The image is combined with the image output by the sixth parabolic mirror imaging unit in a horizontal direction, wherein the fifth parabolic mirror imaging unit and the sixth parabolic mirror imaging unit are the N parabolic mirrors Any two adjacent parabolic mirror imaging units in the imaging unit.
  • the beam splitter can also adjust the deflection angle of the output image in the horizontal direction, which can avoid overlapping the images in the vertical direction, and the display effect is better.
  • the third predetermined relative position is based on a horizontal viewing angle of an image output by the fifth parabolic mirror imaging unit and the sixth parabolic mirror The horizontal angle of view of the image output by the unit is determined.
  • the N parabolic mirror imaging units are staggered up and down along a same vertical axis.
  • the imaging member By staggering the parabolic mirror imaging unit, the imaging member can be more conveniently arranged such that images produced by the imaging member can be input to the corresponding parabolic mirror imaging unit.
  • the shape of the first opening or the second opening of the parabolic mirror included in the parabolic mirror imaging unit may be a quarter circle, a semicircle, a complete circle, or a circular arc.
  • the preset distance is zero, at which point the N parabolic mirror imaging units are bonded to each other when stacked.
  • the preset distance is not zero, and the N parabolic mirror imaging units leave a certain gap with each other when stacking.
  • the image output by the imaging component is a holographic image or a two-dimensional image.
  • the target image is also a holographic image.
  • the first opening and the second opening are identical in shape.
  • FIG. 1 is a schematic structural view of a conventional display system
  • FIG. 2 is a schematic diagram of the principle of a parabolic mirror imaging unit
  • FIG. 3 is a schematic structural diagram of a stacked display device according to an embodiment of the present application.
  • FIG. 4 is a schematic structural view of a parabolic mirror imaging unit according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a stacked display device according to an embodiment of the present application.
  • FIG. 6 is a horizontal perspective view of an image output by a parabolic mirror imaging unit of an embodiment of the present application.
  • FIG. 7 is a horizontal perspective view of an image output by a parabolic mirror imaging unit of an embodiment of the present application.
  • FIG. 8 is a schematic diagram showing a horizontal viewing angle superposition of an image output by a parabolic mirror imaging unit of the stacked display device according to the embodiment of the present application;
  • FIG. 9 is a schematic diagram of horizontal horizontal superimposition of an image output by a parabolic mirror imaging unit of the stacked display device according to the embodiment of the present application.
  • FIG. 10 is a level of an image output by a parabolic mirror imaging unit of the stacked display device of the embodiment of the present application. Schematic diagram of perspective overlay;
  • FIG. 11 is a schematic diagram of a horizontal viewing angle superimposed on an image output by a parabolic mirror imaging unit of a stacked display device according to an embodiment of the present application;
  • FIG. 12 is a schematic diagram of a horizontal viewing angle superimposed on an image output by a parabolic mirror imaging unit of a stacked display device according to an embodiment of the present application;
  • FIG. 13 is a schematic diagram showing a horizontal viewing angle superimposed on an image output by a parabolic mirror imaging unit of a stacked display device according to an embodiment of the present application;
  • FIG. 14 is a schematic diagram showing a horizontal viewing angle superimposed image of an image output by a parabolic mirror imaging unit of a stacked display device according to an embodiment of the present application;
  • 15 is a schematic diagram of a beam splitter arrangement of a parabolic mirror imaging unit of a stacked display device according to an embodiment of the present application;
  • 16 is a schematic vertical superimposed view of an image generated by a parabolic mirror imaging unit of the stacked display device of the embodiment of the present application.
  • the parabolic mirror imaging unit in FIG. 2 is composed of two identical parabolic mirrors. Placed up and down symmetrically, and the focus of the upper parabolic mirror is near the opening of the lower parabolic mirror, and the focus of the lower parabolic mirror is near the opening of the upper parabolic mirror, in the parabolic mirror imaging unit, at the bottom After the light emitted or reflected by the object is reflected twice by the upper and lower parabolic mirrors, an image of the object is formed at the upper opening, that is, the image of the bottom object can be outputted at the upper opening by the parabolic mirror imaging unit.
  • the parabolic mirror imaging unit due to the nature of the parabolic mirror, the human eye can see an image of an object formed at the opening over a wide range of viewing angles.
  • the size of the object at the bottom needs to be much smaller than the size of the parabolic mirror so that the resulting equivalent image can be concentrated near the axis of the paraboloid. It is known from the principle of the parabolic mirror imaging unit that it can concentrate the light reflected by the object at the bottom to the upper opening to form an equivalent image.
  • the stacked display device in the embodiment of the present application utilizes the principle of a parabolic mirror imaging unit to raise the image of the input parabolic mirror imaging unit from the bottom to the top by using a multi-layer parabolic mirror imaging unit, so that different layers can be used.
  • the images produced by the imaging components are brought together to achieve the required bandwidth for display.
  • the stacked display device of the embodiment of the present application will be described in detail below with reference to FIG. 2 to FIG.
  • N is an integer greater than 1 parabolic mirror imaging units, wherein each parabolic mirror imaging unit includes two parabolic mirrors placed symmetrically up and down, and the size of the parabolic mirror included in each parabolic mirror imaging unit All the same;
  • the N imaging members are in a one-to-one correspondence with the N parabolic mirror imaging units, each imaging member being disposed at a preset position, such that the imaging member can input the generated image to Corresponding parabolic mirror imaging unit;
  • the N parabolic mirror imaging units are arranged with a preset spacing when staggered up and down, so that each parabolic reflection
  • the output image position of the mirror imaging unit is the same as the input image position of the adjacent upper parabolic mirror imaging unit, ultimately enabling the parabolic mirror imaging unit at the top to receive the N parabolic mirror imaging units from the N imaging components.
  • the images are combined into a target image.
  • the imaging unit may input the generated image to an image input position at the bottom of the parabolic mirror imaging unit corresponding thereto.
  • each imaging component may be an SLM or a plurality of SLMs integrated.
  • SLM Spatial Light Modulator
  • the parabolic mirror of each parabolic mirror imaging unit may be provided with a downward first opening, and the upper parabolic mirror is provided with an upward second opening, the first opening may make An image output by the lower parabolic mirror imaging unit is input to an input image position of the parabolic mirror imaging unit, and a second opening may output an image output by the parabolic mirror imaging unit to an input image position of the upper parabolic mirror imaging unit .
  • the shapes of the first opening and the second opening may be the same.
  • the arcuate edges of the second opening of each parabolic mirror imaging unit are equidistant from the axis.
  • the shape of the first opening and the second opening may be a quarter circle, a semicircle, a complete circle or a circular arc.
  • a side of each of the parabolic mirror imaging units in the stacked display device may be provided with a third opening, so that the corresponding imaging component can output the generated image to the parabolic mirror imaging unit.
  • Image input location e.g., the side surface of the parabolic mirror imaging unit in the stacked display device of the embodiment of the present application is not provided with the third opening, the imaging member can input the generated image from other positions (for example, from the bottom) to the parabolic reflection. The image input position of the mirror imaging unit.
  • FIG. 3 is a schematic structural diagram of a stacked display device according to an embodiment of the present application.
  • the stacked display device comprises a total of two parabolic mirror imaging units, assuming that the upper layer is the 0th layer and the lower layer is the first layer.
  • FIG. 3 is a schematic structural diagram of a stacked display device according to an embodiment of the present application.
  • the stacked display device comprises a total of two parabolic mirror imaging units, assuming that the upper layer is the 0th layer and the lower layer is the first layer.
  • the 0th layer parabolic mirror imaging unit and the 1st layer parabolic mirror imaging unit Aligned along the axial direction of the parabolic mirror and placed symmetrically, the image produced by the corresponding imaging component of the first layer parabolic mirror imaging unit enters the input image position of the first layer parabolic mirror imaging unit, after passing through the first layer of parabolic reflection After the reflection of the two-sided parabolic mirror of the mirror imaging unit, the first layer parabolic mirror imaging unit outputs the image to the input image position of the 0th layer parabolic mirror imaging unit; and the imaging component in the 0th layer parabolic mirror imaging unit The image produced by the corresponding imaging component also enters the input image position of the 0th layer parabolic mirror imaging unit, and is imaged by the 0th layer parabolic mirror after being reflected by the two-layer parabolic mirror of the 0th layer parabolic mirror imaging unit.
  • the image produced by the imaging unit corresponding to the unit and the first-level parabolic mirror imaging unit is outputted as
  • the parabolic mirror imaging unit in FIG. 3 is only equivalent to half of the parabolic mirror imaging unit structure shown in FIG. 2, that is, the parabolic mirror imaging unit in the stacked display device of the embodiment of the present application is It may be all or part of the structure of the parabolic mirror imaging unit shown in Fig. 2 as long as the image produced by the imaging member can be input to the image input position of the parabolic mirror imaging unit.
  • the stacked display device shown in FIG. 3 only includes two layers of parabolic mirror imaging units.
  • the stacked display device of the embodiment of the present application The number of layers of the parabolic mirror imaging unit included may be 2 or more, and the number of layers included, that is, the number of parabolic mirror imaging units may be determined according to the bandwidth required for actually displaying the image or other requirements in actual application. This application does not specifically limit this. It should also be understood that the shape of the first opening and the second opening of the parabolic mirror imaging unit shown in FIG. 3 is semicircular. In fact, the first opening and the first opening of the stacked display device of the embodiment of the present application are included. The shape of the two openings may also be other arc shapes. The shape of the opening of the parabolic mirror imaging unit is not specifically limited in the present application.
  • the N parabolic mirror imaging units of the stacked display device of the embodiment of the present application are staggered up and down along the same vertical axis.
  • the axes of the two parabolic mirror imaging units are all in a vertical direction, and the axes of the two parabolic mirror imaging units can be aligned when placed such that their axes are all in the same vertical direction.
  • each of the parabolic mirror imaging units may be directly positioned directly above the lower parabolic mirror imaging unit as in FIG. 3, but staggered by a certain distance so that the lower paraboloid
  • the output image position of the mirror imaging unit is the same as the input image position of the upper parabolic mirror imaging unit.
  • FIG. 4 is a schematic view showing the structure of a parabolic mirror imaging unit of an embodiment of the present application.
  • the parabolic mirror imaging unit includes two parabolic mirrors placed symmetrically above and below, and an imaging member is disposed at a preset position on the right side of the parabolic mirror imaging unit, and the imaging member can be composed of a plurality of display modules and corresponding The optical deflection module is composed of.
  • the imaging component can output the generated image to the input image position at the bottom of the parabolic mirror, and the image is output from the top of the parabolic mirror after being reflected by the parabolic mirror.
  • a stacked display device composed of two parabolic mirror imaging units stacked together is shown in FIG. 5.
  • the two parabolic mirror imaging units are aligned along the axial direction of the parabolic mirror, and specifically may be aligned in the vertical direction so that the lower layer
  • the position of the output image of the parabolic mirror imaging unit is the same as the position of the input image of the upper parabolic mirror imaging unit.
  • the upper parabolic mirror imaging unit can synthesize and output the images received by the upper and lower parabolic mirror imaging units from the corresponding imaging components.
  • the output image has a certain angle of view, and the angle of view of the image generated by the parabolic mirror imaging unit is the triangle on the right side of FIG.
  • FIG. 6 only schematically shows the horizontal viewing angle of the image output by the parabolic mirror imaging unit.
  • the image output by the parabolic mirror imaging unit is in the vertical direction in addition to the horizontal viewing angle. There is a vertical viewing angle.
  • the horizontal angle and the vertical angle of the final generated target image may be equal to each The sum of the horizontal viewing angles of the parabolic mirror imaging unit and the sum of the vertical viewing angles.
  • the stacked display device of the embodiment of the present application includes any two adjacent first parabolic mirror imaging units and a second parabolic mirror imaging unit, wherein the first parabolic mirror imaging unit And the second parabolic mirror imaging unit is in a first preset relative position such that the image output by the first parabolic mirror imaging unit and the image output by the second parabolic mirror imaging unit are combined in the horizontal direction.
  • the horizontal viewing angle of the image output by the first parabolic mirror imaging unit and the horizontal viewing angle of the image output by the second parabolic mirror reflection imaging unit may be determined.
  • the parabolic mirror imaging unit structure in the stacked display device of the embodiment of the present application is as shown in FIG. 5, and the parabolic mirror imaging unit in FIG. 5 is located at the lower portion.
  • the first opening and the second opening at the upper portion are a semi-circular structure, and a top view of the image generated by the parabolic mirror imaging unit and the parabolic mirror imaging unit is as shown in FIG. 7, and the diameter of the parabolic mirror imaging unit and The direction of the first vertical radius of the diameter is as shown in FIG.
  • the first predetermined relative position between the first parabolic mirror imaging unit and the second parabolic mirror imaging unit may refer to a first radius of the first parabolic mirror imaging unit and a first of the second parabolic mirror imaging unit.
  • the radius is at a predetermined first angle such that the image output by the first parabolic mirror imaging unit is combined with the image output by the second parabolic mirror imaging unit in a horizontal direction.
  • the horizontal angle of view of the image output by the first parabolic mirror imaging unit and the horizontal angle of view of the image output by the second parabolic mirror reflection imaging unit may be determined. The first angle.
  • the above first angle is determined in detail with reference to FIGS. 8 to 14 in a specific example.
  • the stacked display device of the embodiment of the present application includes the two parabolic mirror imaging units shown in FIG. 5, and the two parabolic mirror imaging units are completely symmetrically staggered, a two-layer parabolic mirror image is formed.
  • the structure of the unit, the horizontal viewing angle of the image produced by the different layers of the parabolic mirror imaging unit of the stacked display device is shown in Figure 8 ( Figure 8 is a top view of the image produced by the different layers of the parabolic mirror imaging unit of the stacked display device).
  • the angle between the first radius of the 0th layer parabolic mirror imaging unit and the first radius of the 1st layer parabolic mirror imaging unit is 180.
  • the horizontal angles of view of the image output by the 0th layer parabolic mirror imaging unit and the 1st layer parabolic mirror imaging unit are respectively located on the left and right sides of the figure, since the 0th layer parabolic mirror imaging unit will The image input by the 1-layer parabolic mirror imaging unit will rotate the angle of the image by 180 degrees during the reflection process. Therefore, if the layered parabolic mirror imaging unit of the stacked display device is completely symmetrically staggered as shown in Fig.
  • the angle between the first radius of the layered parabolic mirror imaging unit and the first radius of the first layer parabolic mirror imaging unit is 180 degrees), so that the images output by the two-layer parabolic mirror imaging unit are overlapped, as shown in FIG.
  • the horizontal angle of view of the image produced by the first-level parabolic mirror imaging unit is rotated by 180 degrees, it will be compared with the 0th layer parabolic mirror imaging unit.
  • the resulting images overlap. Therefore, in order to avoid this phenomenon, the multi-layer parabolic mirror imaging unit of the stacked display device cannot be completely symmetrically placed as shown in FIG.
  • the first radius of the 0-layer parabolic mirror imaging unit and the first radius of the 1st-layer parabolic mirror imaging unit are set to a preset first angle (the first angle is not equal to 180 degrees).
  • the 0th and 1st layer paraboloids The horizontal angle of view of the image produced by the mirror imaging unit is ⁇ 0 and ⁇ 1 , respectively, with the first radius of the 0th layer parabolic mirror imaging unit as the reference line, and the first of the 0th and 1st layer parabolic mirror imaging units
  • the 0th, 1st, and 2nd layer parabolic reflections The horizontal angle of view of the image produced by the mirror imaging unit is ⁇ 0 , ⁇ 1 and ⁇ 2 , respectively, still using the first radius of the 0th layer parabolic mirror imaging unit as the reference line, then the 0th layer, the 1st layer and the 2nd layer
  • the image generated by the parabolic mirror imaging unit that synthesizes different layers is based on the first radius of the 0th layer parabolic mirror imaging unit, and the first radius of the other parabolic mirror imaging unit.
  • the target image is synthesized by unidirectional rotation with respect to the reference line, as shown in FIG. 12, and the images generated by the first layer and the second layer parabolic mirror imaging unit in the final synthesized target image are all imaged on the 0th layer parabolic mirror.
  • the first radius of the 0th layer parabolic mirror imaging unit may be used as a reference line, and the first radii of the other layer parabolic mirror imaging units may be rotated in different directions to synthesize the target image.
  • the horizontal viewing angles of the images generated by the 0th layer, the 1st layer, and the 2nd layer parabolic mirror imaging unit are ⁇ 0 , ⁇ 1 , and ⁇ 2 , respectively, and are still imaged by the 0th layer parabolic mirror imaging unit.
  • the first radius is a reference line
  • the final synthesized target image is as shown in FIG. 14.
  • the horizontal angle of view of the target image is ⁇ 0 + ⁇ 1 + ⁇ 2
  • the resulting images are respectively on either side of the image produced by the 0th layer parabolic mirror imaging unit.
  • the rotation angle of each layer can be calculated by the following formula:
  • N is the number of system layers and N is an integer greater than 1, and ⁇ i is the horizontal viewing angle of each layer.
  • Fig. 15 is a vertical perspective view showing the output image of the parabolic mirror imaging unit.
  • the vertical angle of view of the lowest position of the output image is ⁇ min due to the basic limitation of the optical structure.
  • each layer of the parabolic mirror imaging unit may further include a beam splitter.
  • the spectroscope is used to adjust the deflection angle of the parabolic mirror imaging unit in the vertical direction so that images generated by the multi-layer parabolic mirror imaging unit can be combined in the vertical direction to form a target image.
  • each of the parabolic mirror imaging units further includes a beam splitter disposed at an image input position, wherein the beam splitter is configured to adjust a vertical direction of the parabolic mirror imaging unit.
  • the angle of deflection is such that images output by the plurality of parabolic mirror imaging units can be combined together in a vertical direction.
  • the plurality of parabolic mirror imaging units of the stacked display device of the embodiment of the present application include any adjacent third parabolic mirror imaging unit and fourth parabolic mirror imaging unit, wherein The spectroscope of the third parabolic mirror imaging unit and the spectroscope of the fourth parabolic mirror imaging unit are set to a second preset relative position such that the image output by the third parabolic mirror imaging unit and the fourth parabolic mirror imaging unit output The images are combined in a vertical direction.
  • the second preset relative position may be determined according to a vertical viewing angle of an image output by the third parabolic mirror imaging unit and a vertical viewing angle of an image output by the fourth parabolic mirror imaging unit.
  • the second preset relative position may refer to a vertical angle between the optical splitter of the third parabolic mirror imaging unit and the optical splitter of the fourth parabolic mirror imaging unit is a second angle.
  • the second angle may be determined based on a vertical viewing angle of an image output by the third parabolic mirror imaging unit and a vertical viewing angle of an image output by the fourth parabolic mirror imaging unit.
  • the stacked display system is composed of two layers of parabolic mirror imaging units, assuming a 0th layer and a 1st layer from top to bottom, and the vertical viewing angle of the 0th layer parabolic mirror imaging unit is ⁇ 0 .
  • the inclination angle of the beam splitter is ⁇ 0
  • the vertical angle of view of the imaging unit of the first layer parabolic mirror is ⁇ 1
  • the inclination angle of the beam splitter is ⁇ 1 .
  • ⁇ 0 ⁇ min /2+ ⁇ 0 /4
  • the inclination of the beam splitter of each layer of the parabolic mirror imaging unit can be calculated by the following formula:
  • ⁇ 0 ⁇ min /2+ ⁇ 0 /4
  • N is the number of system layers, and N is an integer greater than 1.
  • the plurality of parabolic mirror imaging units of the stacked display device of the embodiment of the present application include any adjacent fifth parabolic mirror imaging unit and sixth parabolic mirror imaging unit, wherein The spectroscope of the fifth parabolic mirror imaging unit and the spectroscope of the sixth parabolic mirror imaging unit are set to a third preset relative position such that the image output by the fifth parabolic mirror imaging unit and the sixth parabolic mirror are The images output by the unit are combined in the horizontal direction.
  • the third preset relative position may be determined according to a horizontal viewing angle of an image output by the fifth parabolic mirror imaging unit and a horizontal viewing angle of an image output by the sixth parabolic mirror imaging unit.
  • the third preset relative position may be that the vertical angle between the beam splitter of the fifth parabolic mirror imaging unit and the beam splitter of the sixth parabolic mirror imaging unit is a third angle.
  • the third angle may be determined based on a vertical viewing angle of an image output by the fifth parabolic mirror imaging unit and a vertical viewing angle of an image output by the sixth parabolic mirror imaging unit.
  • the above third angle may be jointly determined according to the horizontal angle of view of the image output by the fifth parabolic mirror imaging unit and the sixth parabolic mirror imaging unit.
  • the specific process of determining the third angle is similar to the process of determining the first angle or the second angle. For brevity, no further details are provided herein.
  • the horizontal viewing angle or the vertical viewing angle of the image generated by each parabolic mirror imaging unit in the stacked display device of the embodiment of the present application may be based on the system viewing angle of the stacked display device and the parabolic reflection included in the stacked display device.
  • the number of layers of the mirror imaging unit is determined.
  • the viewing angle of each parabolic mirror imaging unit (including both horizontal and vertical directions) may be the ratio of the system viewing angle to the number of layers of the stacked display device, or may be a paraboloid of different layers according to specific design requirements.
  • the mirror imaging unit assigns different viewing angles as long as the sum of the viewing angles of the parabolic mirror imaging units of each level is equal to the system viewing angle.
  • the system viewing angle, input image size, output image size, and size of the parabolic mirror imaging unit of the stacked display device of the embodiments of the present application may be determined according to specific application requirements.
  • the number of layers of the parabolic mirror imaging unit included in the stacked display device may be determined according to the input image size of the stacked display device, the size of the output image, and the size of the parabolic mirror imaging unit.
  • N Parabolic mirror imaging unit layer
  • the size of the parabolic mirror imaging unit is primarily represented by the diameter of the parabolic mirror imaging unit.
  • the output image size S o , the system angle of view ⁇ s , and the diameter d M of the parabolic mirror can be obtained by step 101.
  • the viewing angle of each of the parabolic mirror imaging units it can be determined based on the number of layers N of the stacked display system and the system viewing angle.
  • the second way is to assign different viewing angles to different parabolic mirror imaging units according to the design requirements, so that the sum of the viewing angles of all parabolic mirror imaging units is equal to the system viewing angle.
  • the mirror imaging unit enables images produced by different layers of parabolic mirror imaging units to be stitched together in a horizontal direction and a vertical direction to form a target image.
  • the stacked display device of the embodiment of the present application includes a plurality of parabolic mirror imaging units stacked together in the up and down direction, which are respectively located in different layers, and therefore, the present application
  • the stacked display device of the embodiment comprising a multilayer parabolic mirror imaging unit is equivalent to the description comprising a plurality of parabolic mirror imaging units, each layer of parabolic mirror imaging unit, that is, each parabolic mirror imaging unit.
  • the image generated by the imaging component in the stacked display device of the embodiment of the present application may be a two-dimensional image or a holographic image, that is, the final output target image may be a two-dimensional image or a holographic image. .
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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Abstract

本申请提供一种堆叠式显示装置。该堆叠式显示装置包括N个抛物面反射镜成像单元，每个抛物面反射镜成像单元包括两个上下对称放置的抛物面反射镜，N为大于1的整数；N个成像部件，每个成像部件用于生成图像并将图像输入到对应的抛物面反射镜成像单元；支撑结构，用于将N个抛物面反射镜成像单元沿同一轴线上下交错排列，使得每个抛物面反射镜成像单元的输出图像位置与相邻上部的抛物面反射镜成像单元的输入图像位置相同，顶部的抛物面反射镜成像单元用于将N个抛物面反射镜成像单元从N个成像部件接收到的多个图像合成为目标图像。本申请实施例的堆叠式显示装置部署灵活不受空间的约束。

Description

堆叠式显示装置
本申请要求于2016年7月19日提交中国专利局、申请号为201610573579.X，发明名称为“堆叠式显示装置”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
本申请涉及图像显示领域，并且更具体地，涉及一种堆叠式显示装置。
背景技术
在图像显示领域，为了获得更好的显示效果，经常需要采用能支持很高带宽的成像部件(如显示器)来产生图像，但是单个成像部件往往因为带宽有限而不能满足图像显示的需求，针对这种情况，通常采用的办法是将多个成像显示器进行空间拼接，以达到图像显示所需要的带宽。下面结合图1的显示系统对现有技术中如何将多个成像部件拼接在一起以提高显示系统的显示带宽进行详细的描述。
如图1所示，显示系统包含激光器、激光扩张器、光分束器(Beam Spliter，BS)、空间光调制器(Spatial Light Modulator，SLM)。第一光分束器BS1将激光扩张器产生的激光分成第一光束和第二光束，然后将第一光束和第二光束分别反射到第一光调制器SLM1和第二光调制器SLM2，接下来SLM1和SLM2分别对第一光束和第二光束进行调制，调制后生成的第一图像和第二图像分别经过BS3和BS4汇聚在一起形成目标图像。在这个过程中，通过对SLM1和SLM2调制得到的图像进行合成，提高了显示带宽。
但是上述方法在应用时为了达到要求的带宽，往往需要多个SLM来共同合成要显示的图像，而受到空间的限制可能无法将多个SLM设计在一个光路中，或者即便是能将多个SLM设计在一起也会导致光路系统非常复杂，使得整个系统显得非常臃肿。
发明内容
本申请提供了一种堆叠式显示装置，能够产生满足带宽需求的目标图像。
第一方面，提供了一种堆叠式显示装置，该堆叠式显示装置包括：N个抛物面反射镜成像单元，每个抛物面反射镜成像单元包括两个上下对称放置的抛物面反射镜，其中，所述N个抛物面反射镜成像单元包含的抛物面反射镜的大小相同，所述N为大于1的整数；N个成像部件，所述N个成像部件与所述N个抛物面反射镜成像单元一一对应，每个成像部件设置于预设位置，所述每个成像部件用于生成图像并将图像输入到对应的抛物面反射镜成像单元；支撑结构，用于将所述N个抛物面反射镜成像单元沿同一轴线上下交错排列，所述N个抛物面反射镜成像单元之间设置有预设间距，使得每个抛物面反射镜成像单元的输出图像位置与相邻上部的抛物面反射镜成像单元的输入图像位置相同，顶部的抛物面反射镜成像单元用于将所述N个抛物面反射镜成像单元从所述N个成像部件接收到的多个图像合成为目标图像。
上述N个抛物面反射镜成像单元沿同一轴线上下交错排列可以是指该N个抛物面反射镜成像单元的轴线在一条直线上。
通过将多个抛物面反射镜成像单元堆叠在一起，使得不同的抛物面反射镜成像单元 分布在不同层中，能够将不同抛物面反射镜成像单元输出的图像合成在一起，从而产生满足带宽需求的目标图像，与现有技术中具有复杂光路的显示系统相比，部署更加灵活并且不受空间的约束。
结合第一方面，在第一方面的某些实现方式中，每个抛物面反射镜成像单元中的下部抛物面反射镜设有向下的第一开口，上部抛物面反射镜的设有向上的第二开口。
通过第一开口和第二开口能够使得每个抛物面反射镜成像单元从下部的抛物面反射镜成像单元接收图像，以及将图像输出到上部的抛物面反射镜成像单元。
结合第一方面，在第一方面的某些实现方式中，每个抛物面反射镜成像单元的第二开口的弧形边缘到所述轴线的距离相等。
结合第一方面，在第一方面的某些实现方式中，每个抛物面反射镜成像单元在侧面设有第三开口，使得对应的成像部件能够将产生的图像输出到所述抛物面反射镜成像单元的图像输入位置。
通过第三开口可以方便的从对应的成像部件产生的图像。
结合第一方面，在第一方面的某些实现方式中，第一抛物面反射镜成像单元和第二抛物面反射镜成像单元设置为第一预设相对位置，使得所述第一抛物面反射镜成像单元输出的图像与所述第二抛物面反射镜成像单元输出的图像在水平方向组合在一起，其中，所述第一抛物面反射镜成像单元和所述第二抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
通过将第一抛物面反射镜成像单元和第二抛物面反射镜成像单元设置于预设位置，能够将图像在水平方向组合在一起，避免图像在水平方向上重叠，显示效果更好。
结合第一方面，在第一方面的某些实现方式中，所述第一预设相对位置是根据所述第一抛物面反射镜成像单元输出的图像的水平视角和所述第二抛物面镜反射成像单元输出的图像的水平视角确定的。
结合第一方面，在第一方面的某些实现方式中，所述抛物面反射镜成像单元还包括设置在图像输入位置的分光器，所述分光器用于调节抛物面反射镜成像单元输出的图像在竖直方向的偏转角度，使得所述多个抛物面反射镜成像单元输出的图像能够在竖直方向上组合在一起。
通过分光器调整输出图像在竖直方向的偏转角度，能够避免图像在竖直方向上重叠，显示效果更好。
结合第一方面，在第一方面的某些实现方式中，第三抛物面反射镜成像单元的分光器和第四抛物面反射镜成像单元的分光器设置为第二预设相对位置，使得所述第三抛物面反射镜成像单元输出的图像与所述第四抛物面反射镜成像单元输出的图像在竖直方向组合在一起，其中，所述第三抛物面反射镜成像单元和所述第四抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
通过分光器还可以调整输出图像在竖直方向的偏转角度，能够避免图像在竖直方向上重叠，显示效果更好。
结合第一方面，在第一方面的某些实现方式中，所述第二预设相对位置是根据所述第三抛物面反射镜成像单元输出的图像的竖直视角和所述第四抛物面反射镜成像单元输出的图像的竖直视角确定的。
结合第一方面，在第一方面的某些实现方式中，所述抛物面反射镜成像单元还包括 设置在图像输入位置的分光器，第五抛物面反射镜成像单元的分光器和第六抛物面反射镜成像单元的分光器设置为第三预设相对位置，使得所述第五抛物面反射镜成像输出的图像与所述第六抛物面反射镜成像单元输出的图像在水平方向组合在一起，其中，所述第五抛物面反射镜成像单元和所述第六抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
通过分光器还可以调整输出图像在水平方向的偏转角度，能够避免图像在竖直方向上重叠，显示效果更好。
结合第一方面，在第一方面的某些实现方式中，所述第三预设相对位置是根据所述第五抛物面反射镜成像单元输出的图像的水平视角与所述第六抛物面反射镜成像单元输出的图像的水平视角确定的。
结合第一方面，在第一方面的某些实现方式中，所述N个抛物面反射镜成像单元沿同一竖直轴线上下交错排列。
通过交错排列抛物面反射镜成像单元，能够更方便的布置成像部件，使得成像部件产生的图像能够输入到对应的抛物面反射镜成像单元。
在某些实现方式中，所述抛物面反射镜成像单元包含的抛物面反射镜的第一开口或者第二开口的形状可以是1/4圆、半圆、完整的圆形或者是一段圆弧。
在某些实现方式中，所述预设距离为零，此时N个抛物面反射镜成像单元在堆叠时彼此结合在一起。
所述预设距离不为零，此时N个抛物面反射镜成像单元在堆叠时彼此留有一定的空隙。
在某些实现方式中，所述成像部件输出的图像为全息图像或者二维图像。当的所述N个成像部件输出的图像为全息图像时，所述目标图像也为全息图像。
在某些实现方式中，所述第一开口和第二开口的形状相同。
在本申请中，通过将多个抛物面反射镜成像单元堆叠在一起，能够将不同抛物面反射镜成像单元输出的图像合成在一起，从而产生满足带宽需求的目标图像，此外在部署该堆叠式显示装置时不受空间的约束，部署更加灵活。
附图说明
图1是现有显示系统的结构示意图；
图2是抛物面反射镜成像单元的原理示意图；
图3是本申请实施例的堆叠式显示装置的结构示意图；
图4是本申请实施例的抛物面反射镜成像单元的结构示意图；
图5是本申请实施例的堆叠式显示装置的结构示意图；
图6是本申请实施例的抛物面反射镜成像单元输出的图像的水平视角示意图；
图7是本申请实施例的抛物面反射镜成像单元输出的图像的水平视角示意图；
图8是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图9是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图10是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平 视角叠加示意图；
图11是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图12是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图13是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图14是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元输出的图像的水平视角叠加示意图；
图15是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元的分光镜设置示意图；
图16是本申请实施例的堆叠式显示装置的抛物面反射镜成像单元产生的图像的竖直视角叠加示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
为了更好的理解本申请实施例的堆叠式显示装置，下面先结合图2对抛物面反射镜成像单元的基本原理进行简单的介绍，图2中的抛物面反射镜成像单元由两块相同的抛物面镜上下对称放置而成，并且，上部的抛物面镜的焦点在下部抛物面镜的开口上方附近，下部的抛物面镜的焦点在上部抛物面镜的开口上方附近，在该抛物面反射镜成像单元中，位于底部的物体发出或者反射的光线经过上下两块抛物面镜的两次反射后，在上部开口处形成了该物体的图像，也就是说通过该抛物面反射镜成像单元可以在上部开口处输出底部的物体的图像。在该抛物面反射镜成像单元中，由于抛物面镜的性质，人眼可以在一个很宽视角范围内看到开口处形成的物体的图像。对于该抛物面反射镜成像单元，位于底部的物体的尺寸需要比抛物面镜的尺寸小很多，以使得生成的等效图像能够集中在抛物面的轴线附近。由抛物面反射镜成像单元的原理可知，它可以将位于底部的物体反射的光汇聚到上部开口处，从而形成一个等效的图像。
因此，本申请实施例中的堆叠式显示装置利用抛物面反射镜成像单元的原理，采用多层抛物面反射镜成像单元将输入抛物面反射镜成像单元的图像从底部提升到顶部，这样就可以将不同层的成像部件产生的图像汇聚在一起，从而达到显示所要求的带宽。下面结合图2至图13对本申请实施例的堆叠式显示装置进行详细的描述。
本申请实施例的堆叠式显示装置包含以下结构：
N(N为大于1的整数)个抛物面反射镜成像单元，其中，每个抛物面反射镜成像单元包括两个上下对称放置抛物面反射镜，并且每个抛物面反射镜成像单元包含的抛物面反射镜的大小均相同；
N个成像部件，该N个成像部件与上述N个抛物面反射镜成像单元是一一对应的关系，每个成像部件都设置在一个预设位置，使得该成像部件能够将产生的图像输入到与其对应的抛物面反射镜成像单元；
支撑结构，用于将N个抛物面反射镜成像单元沿同一轴线上下交错排列，另外，N个抛物面反射镜成像单元之间在上下交错排列时设置有预设间距，使得每个抛物面反射 镜成像单元的输出图像位置与相邻上部抛物面反射镜成像单元的输入图像位置相同，最终使得位于顶部的抛物面反射镜成像单元能将N个抛物面反射镜成像单元从N个成像部件接收到的多个图像合成为目标图像。
本申请实施例中，通过将多个抛物面反射镜成像单元堆叠在一起，使得不同的抛物面反射镜成像单元分布在不同层中，能够将不同抛物面反射镜成像单元输出的图像合成在一起，从而产生满足带宽需求的目标图像，与现有技术中具有复杂光路的显示系统相比，部署更加灵活并且不受空间的约束。
可选地，上述成像部件可以将产生的图像输入到与其对应的抛物面反射镜成像单元位于底部的图像输入位置。
应理解，上述成像部件可以是光调制器(Spatial Light Modulator，SLM)，SLM的数量不限，每个成像部件可以是一个SLM也可以是多个SLM集成在一起。
可选地，作为一个实施例，每个抛物面反射镜成像单元位于下部的抛物面反射镜可以设有向下的第一开口，上部的抛物面反射镜设有向上的第二开口，第一开口可以使得下部的抛物面反射镜成像单元输出的图像输入到该抛物面反射镜成像单元的输入图像位置，第二开口可以将该抛物面反射镜成像单元输出的图像输出到上部的抛物面反射镜成像单元的输入图像位置。
可选地，上述第一开口和第二开口的形状可以相同。
可选地，每个抛物面反射镜成像单元的第二开口的弧形边缘到所述轴线的距离相等。
另外，上述第一开口和第二开口的形状可以是1/4圆、半圆、完整的圆形或者是一段圆弧。
可选地，作为一个实施例，该堆叠式显示装置中的每个抛物面反射镜成像单元的侧面可以设置有第三开口，使得对应的成像部件能够将产生的图像输出到该抛物面反射镜成像单元的图像输入位置。应理解，当本申请实施例的堆叠式显示装置中的抛物面反射镜成像单元的侧面没有设置有第三开口时，成像部件可以从其它位置(例如，从底部)将产生的图像输入到抛物面反射镜成像单元的图像输入位置。
图3示出了本申请实施例的堆叠式显示装置的结构示意图。该堆叠式显示装置一共包含两层抛物面反射镜成像单元，假设上层为第0层，下层为第1层，在图3中，第0层抛物面反射镜成像单元和第1层抛物面反射镜成像单元沿抛物面镜的轴向对齐，并且对称放置，与第1层抛物面反射镜成像单元的对应的成像部件产生的图像进入第1层抛物面反射镜成像单元的输入图像位置，在经过第1层抛物面反射镜成像单元的两面抛物面镜的反射后，第1层抛物面反射镜成像单元将图像输出到第0层抛物面反射镜成像单元的输入图像位置；而与第0层抛物面反射镜成像单元中的成像部件对应的成像部件产生的图像也会进入第0层抛物面反射镜成像单元的输入图像位置，在经过第0层抛物面反射镜成像单元的两层抛物面镜的反射后，与第0层抛物面反射镜成像单元以及第1层抛物面反射镜成像单元对应的成像部件产生的图像输出后合成为目标图像。
应理解，图3中的抛物面反射镜成像单元只相当于图2中所示的抛物面反射镜成像单元结构的一半，也就是说本申请实施例的堆叠式显示装置中的抛物面反射镜成像单元既可以是图2所示的抛物面反射镜成像单元结构的全部或者部分，只要使得成像部件产生的图像能够输入到抛物面反射镜成像单元的图像输入位置即可。另外，图3中所示的堆叠式显示装置只包含两层抛物面镜成像单元，事实上，本申请实施例的堆叠式显示装 置包含的抛物面镜成像单元的层数只要大于等于2即可，具体包含的层数也就是抛物面反射镜成像单元的数目可以根据实际显示图像所要求的带宽或者实际应用时的其它需求来确定，本申请对此不做具体限定。还应理解，图3中所示的抛物面反射镜成像单元的第一开口和第二开口的形状为半圆形，实际上，本申请实施例的堆叠式显示装置所包含的第一开口和第二开口的形状还可以为其它的圆弧形状，本申请对抛物面反射镜成像单元的开口形状不做具体的限定。
可选地，本申请实施例的堆叠式显示装置的N个抛物面反射镜成像单元沿同一竖直轴线上下交错排列。如图3所示，两个抛物面反射镜成像单元的轴线均为竖直方向，在放置时可以将这两个抛物面反射镜成像单元的轴线对齐，使得它们的轴线都在同一竖直方向。另外，在上下放置抛物面反射镜成像单元时，可以像图3那样使得每个抛物面反射镜成像单元并不是直接位于下部抛物面反射镜成像单元的正上方，而是错开一定的距离，使得下部的抛物面反射镜成像单元的输出图像位置与上部的抛物面反射镜成像单元的输入图像位置相同，另外，这样错开放置还能便于设置与每个抛物面反射镜成像单元对应的成像部件。图3中只是示出了包含两个抛物面反射镜成像单元的情况，事实上，包含两个以上抛物面反射镜成像单元的堆叠式显示装置的相邻抛物面反射镜成像单元在放置时也可以采用类似的放置方式。
图4示出了本申请实施例的抛物面反射镜成像单元的结构示意图。在图4中，抛物面反射镜成像单元包括两块上下对称放置的抛物面反射镜，在该抛物面反射镜成像单元右侧的预设位置设置有成像部件，该成像部件可以由多个显示模块以及相应的光学偏转模块组成的。该成像部件可以将产生的图像输出到抛物面反射镜底部的输入图像位置，图像经过抛物面反射镜的反射后从抛物面反射镜顶部输出。由两个抛物面反射镜成像单元堆叠在一起组成的堆叠式显示装置如图5所示，两个抛物面反射镜成像单元沿着抛物面镜的轴向对齐，具体可以是沿竖直方向对齐，使得下层抛物面反射镜成像单元的输出图像的位置与上层抛物面反射镜成像单元的输入图像位置相同。这样，上层的抛物面反射镜成像单元就可以将上下两层抛物面反射镜成像单元从对应的成像部件接收到的图像合成在一起输出。
在本申请实施例的堆叠式显示装置中，对于每一个抛物面反射镜成像单元来说，输出的图像都会有一定的视角，抛物面反射镜成像单元产生的图像的视角如图6中右侧的三角形区域所示，应理解，图6中只是示意性的示出了抛物面反射镜成像单元输出的图像的水平视角，实际上，抛物面反射镜成像单元输出的图像除了水平视角外还会在竖直方向上有一个竖直视角。
可选地，作为一个实施例，在上述堆叠式显示装置中，当各个抛物面反射镜成像单元处于一定的预设摆放位置时可以使得最终产生的目标图像的水平视角、竖直视角分别等于各个抛物面反射镜成像单元的水平视角之和以及竖直视角之和。
可选地，作为一个实施例，本申请实施例的堆叠式显示装置包含任意两个相邻的第一抛物面反射镜成像单元以及第二抛物面反射镜成像单元，其中，第一抛物面反射镜成像单元和第二抛物面反射镜成像单元处于第一预设相对位置，使得第一抛物面反射镜成像单元输出的图像与第二抛物面反射镜成像单元输出的图像在水平方向组合在一起。
可选地，在确定上述第一预设相对位置时，可以根据第一抛物面反射镜成像单元输出的图像的水平视角和第二抛物面镜反射成像单元输出的图像的水平视角来确定的。
为了更详细的描述第一预设相对位置的含义，假设本申请实施例的堆叠式显示装置中的抛物面反射镜成像单元结构如图5所示，图5中的抛物面反射镜成像单元位于下部的第一开口以及位于上部的第二开口是一个半圆形结构，该抛物面反射镜成像单元以及该抛物面反射镜成像单元产生的图像的俯视图如图7所示，抛物面反射镜成像单元的直径以及与该直径竖直的第一半径的方向如图7中所示。
当第一抛物面反射镜成像单元和第二抛物面反射镜成像单元之间处于第一预设相对位置可以是指第一抛物面反射镜成像单元的第一半径与第二抛物面反射镜成像单元的第一半径处于预设的第一夹角，使得第一抛物面反射镜成像单元输出的图像与第二抛物面反射镜成像单元输出的图像在水平方向组合在一起。
当上述第一预设相对位置是预设的第一夹角时，可以根据第一抛物面反射镜成像单元输出的图像的水平视角和第二抛物面镜反射成像单元输出的图像的水平视角来确定该第一夹角。
下面结合图8至图14以具体的实例来详细说明如何确定上述第一夹角。
当本申请实施例的堆叠式显示装置包含图5所示的两个抛物面反射镜成像单元，并且这两个抛物面反射镜成像单元完全对称错开放置时就形成了一个包含上下两层抛物面反射镜成像单元的结构，该堆叠式显示装置的不同层抛物面反射镜成像单元产生的图像的水平视角如图8(图8是堆叠式显示装置不同层抛物面反射镜成像单元产生图像的俯视图)所示。假设堆叠式显示装置的顶层是第0层，底层是第1层，那么，第0层抛物面反射镜成像单元的第一半径和第1层抛物面反射镜成像单元的第一半径的夹角是180度，而且，第0层抛物面反射镜成像单元和第1层抛物面反射镜成像单元输出的图像的水平视角分别位于图中的左侧和右侧，由于第0层抛物面反射镜成像单元会对第1层抛物面反射镜成像单元输入的图像进行反射的过程中会将图像的角度旋转180度，因此，如果堆叠式显示装置的层抛物面反射镜成像单元如果像图5那样完全对称错开放置(第0层抛物面反射镜成像单元的第一半径与第1层抛物面反射镜成像单元的第一半径的夹角为180度)的话会使得两层抛物面反射镜成像单元输出的图像重叠在一起，如图8中所示，将第1层抛物面反射镜成像单元产生的图像的水平视角旋转180度的话就会与第0层抛物面反射镜成像单元产生的图像重叠。因此，为了避免这种现象的发生，堆叠式显示装置的多层抛物面反射镜成像单元在放置时不能如图5所示的那样完全对称放置，也就是说为了避免图像重叠的发生，需要将第0层抛物面反射镜成像单元的第一半径和第1层抛物面反射镜成像单元的第一半径设置为预设的第一夹角(该第一夹角不等于180度)。
对于包含两层抛物面反射镜成像单元的堆叠式显示装置来说，为了避免第0层与第1层抛物面反射镜成像单元产生的图像重叠，如图9所示，第0层和第1层抛物面反射镜成像单元产生的图像的水平视角分别为θ0和θ1，以第0层抛物面反射镜成像单元的第一半径为基准线，第0层和第1层抛物面反射镜成像单元的第一半径相对于基准线的要旋转的角度分别为r0和r1，其中，r0＝0，r1＝r0+180°-(θ0+θ1)/2＝180°-(θ0+θ1)/2，此时，当第1层与第0层抛物面反射镜成像单元的第一夹角为r1-r0＝180°-(θ0+θ1)/2，当处于第一夹角时，第0层抛物面反射镜成像单元将第1层抛物面反射镜成像单元产生的图像反射后便可以将两层抛物面反射镜成像单元产生的图像拼接在一起，而不会发生重叠，如图10所示，最终得到的目标图像的水平方向的视角为θ0+θ1。
如图11所示，对于包含三层抛物面反射镜成像单元的堆叠式显示装置来说，为了避 免各层抛物面反射镜成像单元产生的图像重叠，第0层、第1层以及第2层抛物面反射镜成像单元产生的图像的水平视角分别为θ0、θ1和θ2，仍然以第0层抛物面反射镜成像单元的第一半径为基准线，那么第0层、第1层以及第2层抛物面反射镜成像单元的第一半径为基准线相对于基准线要旋转的角度分别为r0、r1和r2，其中，r0＝0，r1＝r0+180°-(θ0+θ1)/2＝180°-(θ0+θ1)/2，r2＝r1+180°-(θ1+θ2)/2＝360°-(θ0+2θ1+θ2)/2，此时，根据各个旋转角度的差值就可以的出各个层之间的第一夹角的大小，当各个层之间处于预设的第一夹角时，例如，当第1层与第0层抛物面反射镜成像单元产生的第一夹角为180°-(θ0+θ1)/2，第2层与第0层抛物面反射镜成像单元产生的第一夹角为180°-(θ0+2θ1+θ2)/2时，最终由第0层抛物面反射镜成像单元输出的目标图像如图11所示，目标图像的水平方向的视角为θ0+θ1+θ2。
在图10至图12中，合成不同层的抛物面反射镜成像单元产生的图像时是以第0层抛物面反射镜成像单元的第一半径为基准线，其它层抛物面反射镜成像单元的第一半径相对于该基准线通过单方向旋转来合成目标图像，如图12所示，最后合成的目标图像中第1层和第2层抛物面反射镜成像单元产生的图像都在第0层抛物面反射镜成像单元产生的图像的一侧。可选地，也可以第0层抛物面反射镜成像单元的第一半径为基准线，其它层抛物面反射镜成像单元的第一半径分别沿不同方向旋转来合成目标图像。如图13所示，第0层、第1层以及第2层抛物面反射镜成像单元产生的图像的水平视角分别为θ0、θ1和θ2，仍然以第0层抛物面反射镜成像单元的第一半径为基准线，那么第0层、第1层以及第2层抛物面反射镜成像单元产生的第一半径相对于基准线的旋转角度分别为r0、r1和r2，其中，r0＝0，r1＝r0+180°-(θ0+θ1)/2＝180°-(θ0+θ1)/2，r2＝180°+(θ0+θ2)/2，最后合成的目标图像如图14所示，目标图像的水平方向的视角为θ0+θ1+θ2，并且，最后合成的目标图像中第1层和第2层抛物面反射镜成像单元产生的图像分别在第0层抛物面反射镜成像单元产生的图像的两侧。
由上述推导可知，以第0层抛物面反射镜成像单元的第一半径为基准线，其它层抛物面反射镜成像单元的第一半径通过单方向旋转来合成目标图像时，每层的旋转角度可以采用下列公式计算：
r0＝0；
ri＝ri-1+180°-(θi-1+θi)/2；(i＝1，……，N-1)N为系统层数且N为大于1的整数，θi每层水平视角。
以第0层抛物面反射镜成像单元的第一半径为基准线，其它层抛物面反射镜成像单元的第一半径左右扩张来合成目标图像时，每层的旋转角度可以采用下列公式计算：
r0＝0；
r1＝180°-(θ0+θ1)/2
r2＝180°+(θ0+θ2)/2
ri＝ri-2+180°-(θi-2+θi)/2；i＝2k-1,k＝2,……,(N-1)/2
ri＝ri-2+180°+(θi-2+θi)/2；i＝2k,k＝2,……,(N-1)/2
其中，N为系统层数并且N为大于1的整数，θi为每层水平视角。
图15示出了抛物面反射镜成像单元输出图像的竖直视角示意图，如图15所示，由于光学结构的基本限制，其输出图像的最低位置的竖直视角为ρmin。而在堆叠式显示装置中也存在类似的问题，因此，为了使得每层抛物面反射镜成像单元产生的图像在输出 时不受到最低位置视角的限制，每层抛物面反射镜成像单元还可以包括分光器，该分光器用于调节抛物面反射镜成像单元在竖直方向的偏转角度，以使得多层抛物面反射镜成像单元产生的图像能够在竖直方向上组合在一起形成目标图像。
可选地，作为一个实施例，在上述堆叠式显示装置中，每个抛物面反射镜成像单元还包括设置在图像输入位置的分光器，该分光器用于调节抛物面反射镜成像单元在竖直方向的偏转角度，以使得所述多个抛物面反射镜成像单元输出的图像能够在竖直方向上组合在一起。
可选地，作为一个实施例，本申请实施例的堆叠式显示装置的多个抛物面反射镜成像单元中包括任意相邻的第三抛物面反射镜成像单元和第四抛物面反射镜成像单元，其中，第三抛物面反射镜成像单元的分光器和第四抛物面反射镜成像单元的分光器设置为第二预设相对位置，使得第三抛物面反射镜成像单元输出的图像与第四抛物面反射镜成像单元输出的图像在竖直方向组合在一起。
可选地，作为一个实施例，上述第二预设相对位置可以根据第三抛物面反射镜成像单元输出的图像的竖直视角和第四抛物面反射镜成像单元输出的图像的竖直视角来确定。
具体地，当上述第二预设相对位置可以是指第三抛物面反射镜成像单元的分光器与第四抛物面反射镜成像单元的分光器的竖直夹角为第二夹角。该第二夹角可以根据第三抛物面反射镜成像单元输出的图像的竖直视角和第四抛物面反射镜成像单元输出的图像的竖直视角来确定。
下面结合图16来具体描述如何确定上述第二夹角。如图16所示，堆叠式显示系统由两层抛物面反射镜成像单元组成，假设从上到下依次为第0层和第1层，第0层抛物面反射镜成像单元的竖直视角为θ0，分光器的倾角为ρ0，第1层抛物面反射镜成像单元的竖直视角为θ1，分光器的倾角为ρ1，从图16可以得出：
2ρ0＝ρmin+θ0/2
2ρ1＝2ρ0+(θ0+θ1)/2
由上述两个等式可以得到：
ρ0＝ρmin/2+θ0/4
ρ1＝ρ0+(θ0+θ1)/4＝ρmin/2+(2θ0+θ1)/4
从而得出第0层抛物面反射镜成像单元与第1层抛物面反射镜成像单元的第二夹角为ρ1-ρ0＝(θ0+θ1)/4。也就是说，第二夹角可以根据第0层与第1层抛物面反射镜成像单元产生的图像的竖直视角来共同确定。
由上述推理可以得到，当堆叠式显示装置包括N层抛物面反射镜成像单元时，各层抛物面反射镜成像单元的分光器的倾角可以采用下面的公式计算：
ρ0＝ρmin/2+θ0/4
ρi＝ρi-1+(θi+θi-1)/4
其中，i为小于N的整数，N为系统层数并且N为大于1的整数。
可选地，作为一个实施例，本申请实施例的堆叠式显示装置的多个抛物面反射镜成像单元中包括任意相邻的第五抛物面反射镜成像单元和第六抛物面反射镜成像单元，其中，第五抛物面反射镜成像单元的分光器和第六抛物面反射镜成像单元的分光器设置为第三预设相对位置，使得第五抛物面反射镜成像单元输出的图像与第六抛物面反射镜成 像单元输出的图像在水平方向组合在一起。
可选地，作为一个实施例，上述第三预设相对位置可以根据第五抛物面反射镜成像单元输出的图像的水平视角和第六抛物面反射镜成像单元输出的图像的水平视角来确定。
具体地，当上述第三预设相对位置可以是指第五抛物面反射镜成像单元的分光器与第六抛物面反射镜成像单元的分光器的竖直夹角为第三夹角。该第三夹角可以根据第五抛物面反射镜成像单元输出的图像的竖直视角和第六抛物面反射镜成像单元输出的图像的竖直视角来确定。
应理解，上述第三夹角可以根据第五抛物面反射镜成像单元和第六抛物面反射镜成像单元输出的图像的水平视角来共同确定。确定第三夹角的具体过程与确定第一夹角或者第二夹角的过程类似，为了简洁，此处不再赘述。
可选地，本申请实施例的堆叠式显示装置中每个抛物面反射镜成像单元产生的图像的水平视角或者竖直视角可以根据堆叠式显示装置的系统视角以及堆叠式显示装置所包含的抛物面反射镜成像单元的层数来确定。例如，每层抛物面反射镜成像单元的视角(包括水平和竖直两个方向)可以为系统视角与堆叠式显示装置的层数的比值，也可以根据具体的设计需求，为不同的层的抛物面反射镜成像单元分配不同的视角，只要各个层次的抛物面反射镜成像单元的视角总和与系统视角相等即可。
应理解，本申请实施例的堆叠式显示装置的系统视角、输入图像尺寸、输出图像尺寸以及抛物面反射镜成像单元的尺寸可以根据具体的应用需求来确定。堆叠式显示装置包含的抛物面反射镜成像单元的层数可以根据堆叠式显示装置的输入图像尺寸、输出图像的尺寸以及抛物面反射镜成像单元的尺寸而确定。
下面结合对本申请实施例的堆叠式显示装置的设计进行详细的介绍：
为便于描述，现将堆叠式显示装置的相关符号定义如下：
系统视角：θs；
抛物面反射镜成像单元层数：N；
每层视角：θi；
输入图像尺寸：Si；
输出图像尺寸：So；
抛物面反射镜成像单元的抛物面反射镜直径dM；
101、根据应用的需求确定堆叠式显示系统的视角、输入图像尺寸、输出图像尺寸以及抛物面反射镜成像单元的尺寸。抛物面反射镜成像单元的尺寸主要是用抛物面反射镜成像单元的直径来表示。
通过步骤101可以获得输出图像尺寸So，系统视角θs，抛物面反射镜的直径dM。
102、确定堆叠式显示系统的层数。
根据公式So＝ρ(N,dM)×Si确定ρ，其中，ρ为有效系数，它是抛物面反射镜成像单元层数N以及抛物面反射镜成像单元尺寸dM的函数，ρ随着N的增加而减小，随着dM的增加而增加，在确定了ρ之后就可以根据ρ和dM计算出抛物面反射镜成像单元的层数N。
103、确定每层抛物面反射镜成像单元的视角。
在确定每层抛物面反射镜成像单元的视角时，可以根据堆叠式显示系统的层数N以 及系统视角来确定。在具体分配视角时可以由多种方式，第一种方式是将整个系统的视角品均分配给每层抛物面反射镜成像单元，每层抛物面反射镜成像单元的视角θi＝θs/N；第二种方式是根据设计的需要为不同的抛物面反射镜成像单元分配不同的视角，使得所有抛物面反射镜成像单元的视角之和等于系统视角。
104、确定多层抛物面反射镜成像单元的第一半径之间的夹角，以及多层抛物面反射镜成像单元的分光器的在竖直方向的夹角，并按照相应的角度布置各层抛物面反射镜成像单元，使得不同层抛物面反射镜成像单元产生的图像能够在水平方向和竖直方向拼接在一起，形成目标图像。
应理解，本申请实施例的堆叠式显示装置包括多个抛物面反射镜成像单元，该多个抛物面反射镜成像单元是沿着上下方向堆叠在一起的，它们分别位于不同的层，因此，本申请实施例中的堆叠式显示装置包含多层抛物面反射镜成像单元与包含多个抛物面反射镜成像单元的描述是等价的，每层抛物面反射镜成像单元也就是每个抛物面反射镜成像单元。
应理解，本申请实施例的堆叠式显示装置中的成像部件产生的图像可以是二维图像也可以是全息图像，也就是说最后输出的目标图像可以是一个二维图像也可以是一个全息图像。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
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单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (12)

  1. 一种堆叠式显示装置，其特征在于，包括：
    N个抛物面反射镜成像单元，每个抛物面反射镜成像单元包括两个上下对称放置的抛物面反射镜，其中，所述N个抛物面反射镜成像单元包含的抛物面反射镜的大小相同，所述N为大于1的整数；
    N个成像部件，所述N个成像部件与所述N个抛物面反射镜成像单元一一对应，每个成像部件设置于预设位置，所述每个成像部件用于生成图像并将图像输入到对应的抛物面反射镜成像单元；
    支撑结构，用于将所述N个抛物面反射镜成像单元沿同一轴线上下交错排列，所述N个抛物面反射镜成像单元之间设置有预设间距，使得每个抛物面反射镜成像单元的输出图像位置与相邻上部的抛物面反射镜成像单元的输入图像位置相同，顶部的抛物面反射镜成像单元用于将所述N个抛物面反射镜成像单元从所述N个成像部件接收到的多个图像合成为目标图像。
  2. 如权利要求1所述的堆叠式显示装置，其特征在于，每个抛物面反射镜成像单元中的下部抛物面反射镜设有向下的第一开口，上部抛物面反射镜的设有向上的第二开口。
  3. 如权利要求2所述的堆叠式显示装置，其特征在于，每个抛物面反射镜成像单元的第二开口的弧形边缘到所述轴线的距离相等。
  4. 如权利要求1-3中任一项所述的堆叠式显示装置，其特征在于，每个抛物面反射镜成像单元在侧面设有第三开口，使得对应的成像部件能够将产生的图像输出到所述抛物面反射镜成像单元的图像输入位置。
  5. 如权利要求1-4中任一项所述的堆叠式显示装置，其特征在于，第一抛物面反射镜成像单元和第二抛物面反射镜成像单元设置为第一预设相对位置，使得所述第一抛物面反射镜成像单元输出的图像与所述第二抛物面反射镜成像单元输出的图像在水平方向组合在一起，其中，所述第一抛物面反射镜成像单元和所述第二抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
  6. 如权利要求5所述的堆叠式显示装置，其特征在于，所述第一预设相对位置是根据所述第一抛物面反射镜成像单元输出的图像的水平视角和所述第二抛物面镜反射成像单元输出的图像的水平视角确定的。
  7. 如权利要求1-6中任一项所述的堆叠式显示装置，其特征在于，所述抛物面反射镜成像单元还包括设置在图像输入位置的分光器，所述分光器用于调节抛物面反射镜成像单元输出的图像在竖直方向的偏转角度，使得所述多个抛物面反射镜成像单元输出的图像能够在竖直方向上组合在一起。
  8. 如权利要求7所述的堆叠式显示装置，其特征在于，第三抛物面反射镜成像单元的分光器和第四抛物面反射镜成像单元的分光器设置为第二预设相对位置，使得所述第三抛物面反射镜成像单元输出的图像与所述第四抛物面反射镜成像单元输出的图像在竖直方向组合在一起，其中，所述第三抛物面反射镜成像单元和所述第四抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
  9. 如权利要求8所述的堆叠式显示装置，其特征在于，所述第二预设相对位置是根据所述第三抛物面反射镜成像单元输出的图像的竖直视角和所述第四抛物面反射镜成像单元输出的图像的竖直视角确定的。
  10. 如权利要求1-6中任一项所述的堆叠式显示装置，其特征在于，所述抛物面反射镜成像单元还包括设置在图像输入位置的分光器，第五抛物面反射镜成像单元的分光器和第六抛物面反射镜成像单元的分光器设置为第三预设相对位置，使得所述第五抛物面反射镜成像输出的图像与所述第六抛物面反射镜成像单元输出的图像在水平方向组合在一起，其中，所述第五抛物面反射镜成像单元和所述第六抛物面反射镜成像单元为所述N个抛物面反射镜成像单元中的任意两个相邻的抛物面反射镜成像单元。
  11. 如权利要求10所述的堆叠式显示装置，其特征在于，所述第三预设相对位置是根据所述第五抛物面反射镜成像单元输出的图像的水平视角与所述第六抛物面反射镜成像单元输出的图像的水平视角确定的。
  12. 如权利要求1-11中任一项所述的堆叠式显示装置，其特征在于，所述N个抛物面反射镜成像单元沿同一竖直轴线上下交错排列。
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