CN105572879B - A kind of nearly eye display device of single image source dual-eye - Google Patents

A kind of nearly eye display device of single image source dual-eye Download PDF

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Publication number
CN105572879B
CN105572879B CN201610098482.8A CN201610098482A CN105572879B CN 105572879 B CN105572879 B CN 105572879B CN 201610098482 A CN201610098482 A CN 201610098482A CN 105572879 B CN105572879 B CN 105572879B
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curved surface
free curved
prism
display device
display element
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CN105572879A (en
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程德文
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Beijing NED+AR Display Technology Co.,Ltd.
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Suzhou Naidejia Tiancheng Optoelectronics Technology Co Ltd
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Priority to CN201610098482.8A priority patent/CN105572879B/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/017Head mounted
    • G02B27/0172Head mounted characterised by optical features
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/017Head mounted
    • G02B27/0176Head mounted characterised by mechanical features

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The present invention relates to a kind of single nearly eye display device of image source dual-eye, it is realized based on free curved surface prism, in the case of using only single Micro display element, coordinated by the position of free curved surface prism and reflecting element, realize good binocular vision experience, and there is ultra-thin volume, main body frame can be attached to as the peripheral hardware of intermediate plate type or General calibration glasses are present, the cost of nearly eye display device is effectively reduced, improves Consumer's Experience, the universalness of pushing meanss.

Description

A kind of nearly eye display device of single image source dual-eye
Technical field
The present invention relates to a kind of free curved surface prism, and specifically, more particularly to one kind is shown suitable for the nearly eye of single image source The free curved surface prism of device and its nearly eye display device of single image source is used, single nearly eye display device of image source only needs one Individual high PPI compact image display element is that good binocular vision characteristic can be achieved, and effectively reduces nearly eye display device Cost.
Background technology
Consumption electronic product has obtained vigorous growth in recent years, and after smart mobile phone, consumer generally knows Road virtual reality (virtual reality) and the concept for strengthening (augmented reality), and chase the various productions of correlation Product are proposed conceptual production as the company such as trial, Microsoft, FACEBOOK, GOOGLE of experience new technology Product, in these products, the display element individually for certain human eye has been used mostly, or separate from right and left eyes visual optical Two middle-size and small-size display elements in system, though the two middle-size and small-size display elements can be integrated in it is integrally-formed, such as The gear VR equipment that Oculus cooperates with Samsung, but inevasible still need to use the overall larger area of implantation to show Device (such as mobile phone screen), it is such to set for the demand for the high PPI resolution ratio display element that nearly eye display device needs Obviously not economic enough, the strong influence manufacturing cost of nearly eye display device is put, also can not be real under frivolous optical system Now good binocular vision characteristic.
A high proportion of display element in cost is occupied in order to reduce use, some designs are proposed based on spectroscopical side Formula, the light from display element is divided into two beams via the spectroscope of such as half-reflection and half-transmission and enters the visual system of right and left eyes, But the drawbacks of aforesaid way, is it is clear that due to spectroscopical introducing, the volume of optical system can not become thinner, light loss Become big, be unfavorable for the lightening of equipment, influence the usage experience of nearly eye display device.
The content of the invention
The present invention is intended to provide a kind of nearly eye display device of single image source dual-eye, it is realized based on free curved surface prism, only In the case of using single Micro display element, coordinated by the position of effective optical surface and reflecting element, can realized good Binocular vision experience, and there is ultra-thin volume, main body frame or common school can be attached to as the peripheral hardware of intermediate plate type Positive glasses are present.
According to a kind of single nearly eye display device of image source dual-eye of the present invention, including:One Micro display element;First is freely bent Face prism and the second free curved surface prism;Light for the Micro display element to be sent reflex to positioned at left side first from By the first speculum of curved surface prism, the light for the Micro display element to be sent reflexes to the second freedom positioned at right side Second speculum of curved surface prism, the Micro display element are located on the center line of the first and second free curved surface prisms, display Face is set perpendicular to the center line, relative and parallel with emergent pupil with first and second speculum;Described first and second The non-bulging lower edge position in first and second free curved surface prism of reflecting surface lower edge position of speculum.
As a kind of mode of specific implementation, first speculum includes the 3rd free curved surface prism, and described second is anti- Penetrating mirror includes the 4th free curved surface prism;Third and fourth free curved surface prism comprise at least aspherical face type from By surface, and the position of third and fourth free curved surface prism is symmetrical on the center line.
Wherein, third and fourth free curved surface prism can be integrally formed;Third and fourth free form surface rib The light entrance face of mirror is set relative to Micro display element, and tilted to the center line direction respectively.
Preferably, each in first to fourth free curved surface prism comprises at least three optical surfaces, two of which light The focal power in face is different from another optical surface.
Deformed as one kind, the first and second speculums are a pair of spheric reflections being symmetric on the center line Mirror, a pair of spherical reflectors are discrete setting or the setting that is integrated.
According to the free curved surface prism of the present invention, there is frivolous advantage easy to install, and match somebody with somebody in the position of reflecting element Under conjunction, the photosynthetic reason that can not expand the size of whole optical system and send the Micro display element as single image source is divided Two free curved surface prisms in left and right are fitted on, the efficiency of light energy utilization is improved, the weight and volume of alleviator, shows so as to improve nearly eye Show the practicality and comfort level of equipment, reduce the cost for realizing the various nearly eye display devices such as VR, AR.
Brief description of the drawings
Fig. 1 is the index path according to the nearly eye display device of first embodiment of the invention
Fig. 2 is the index path according to the nearly eye display device of second embodiment of the invention
Fig. 3 is according to a kind of index path of the nearly eye display device of variation of the present invention
Fig. 4 is that the system block diagram after external device is electrically connected according to the nearly eye display device of the present invention
Embodiment
Herein below refer to the attached drawing and the structure of free curved surface prism etc. is discussed in detail the reality of the specific implementation present invention Border example.The present invention can be embodied in many different forms and should not be construed as limited by each embodiment set forth herein.And It is to provide these embodiments and make it that the disclosure is fully and complete, and this hair is comprehensively passed on to those skilled in the art Bright design.In addition, the feature in each embodiment can also combine in the way of outside following embodiments, the skill after combination Art scheme is still fallen within the scope of the present application.
First embodiment
As described in Figure 1, the sectional view of the nearly eye display device 100 of single image source dual-eye of the first embodiment of the present invention, it is wrapped Include a Micro display element 1I, and two sets of visual systems positioned at the left and right sides, it is possible to understand that, two sets of left and right mesh Optometry system is symmetric on Micro display element 1I central shaft O, Micro display element 1I central shaft O and left and right The center line of two sets of visual systems coincides.Hereinafter, by using the visual optical in left side as object is specifically described, this is illustrated The specific embodiment of invention.
The visual system in left side includes the first free curved surface prism and be oppositely arranged with Micro display element first Speculum, the first speculum are the 3rd free curved surface prism, and the first free curved surface prism and the 3rd free curved surface prism include 3 Individual optical surface.For ease of expression, using inverse optical path direction, by human eye direction to Micro display element, light is via optical surface 11L The first free curved surface prism is transmitted into, incides and optical surface 11L is reflected back on optical surface 12L, and on optical surface 11L again Experiences total internal reflection reaches optical surface 13L, is transmitted through optical surface 14L and enters the 3rd free curved surface prism, then via optical surface 15L Total internal reflection is passed through after being reflected again on optical surface 16L and injected to by optical surface 15L up to miniature aobvious to optical surface 16L Show on device 1I.Wherein optical surface 12L, 13L, 15L, 16L focal power is just, optical surface 11L, 14L focal power is negative.This
Art personnel it should be understood that visual system and the left side on right side to be symmetrical arranged, including the second He 4th free curved surface prism, each optical surface 11R-16R and 11L-16L is oppositely arranged, and is had the function that consistent.First is freely bent Plane of incidence 11L, 11R face human eye of face prism and the second free curved surface prism is set, and micro-display 1I is located at two centers simultaneously The emergent pupil that the optical system of (or the second, the 4th free curved surface prism is formed) is formed with the first, the 3rd free curved surface prism is equal OK.In order to avoid the influence of other light in visual field, diaphragm G can be added, diaphragm G can be located at the emergent pupil of whole optical system Opening position.
Further, when the first embodiment of the present invention is used as AR class display devices, can also further comprise positioned at the Wedge-shaped compensating prism above one free curved surface prism, compensating prism include outer surface 17L, the wedge that optical surface 12L and 17L are formed Shape prism and the first free curved surface prism form an afocal system to extraneous throw light, and half is now coated with 12L, 12R Anti- pellicle, total reflection film is coated with 16L, 16R, ambient enters wedge-shaped compensating prism via 17L, saturating in optical surface 12L Human eye is transmitted into further across optical surface 11L after penetrating, it is extraneous due to the compensating action of the 12L and 17L prism wedges formed It is unaffected that scene light enters human eye.
For the convenient needs for manufacturing and installing, each free curved surface prism of the invention is also possible that other surfaces, but In view of this kind of surface does not generally possess the effect of optical transmission or reflection and is carried out the processing such as sanding, not as this hair Optical surface in bright is discussed.
It will be appreciated by those skilled in the art that, in the optical surface 11L and 11R in face of eyes of user, elimination can be coated with The protecting film of harmful light, to avoid the injury to human eyesight.And when eye display device near as simple VR classes, in light Face 12L and 12R outer side surface can be coated with reflectance coating, it is ensured that the efficiency of light total reflection, and effectively prevent extraneous light from not entering Enter inside free curved surface prism, avoid influence of the veiling glare to display effect.
Each optical surface parameter according to a first embodiment of the present invention can represent by table 1 below -1 and table 1-2,
Surface markers Surface type Radius Material X is eccentric Y is eccentric Z is eccentric Alpha is tilted
Diaphragm G Sphere Infinitely 0 0 0 0
11 Sphere -1000 PMMA 0 0.000 37.218 -3.000
12 XY multinomials -48.9221 PMMA 0 0.000 42.100 -31.355
13 Sphere -56.6915 0 14.717 41.846 33.057
14 Sphere -20 PMMA 0 17.842 42.977 81.506
15 Sphere -55.0243 PMMA 0 23.556 44.627 16.256
16 XY multinomials 8.704021 PMMA 0 28.386 39.144 -11.982
Display element Sphere Infinitely 0 32.000 52.207 0.000
17 Sphere -1000 PMMA 0 0.000 46.218 -3.000
Table 1-1
Wherein surface 12 and surface 16 are the Free Surface of XY polynomials, and each term coefficient is as shown in table 1-2:
Surface 12 Surface 16
K 0 0
C1 0.0000E+00 0.0000E+00
C2 0.0000E+00 0.0000E+00
C3 -5.3586E-03 -2.7244E-02
C4 0.0000E+00 0.0000E+00
C5 6.3061E-04 -3.4464E-02
C6 0.0000E+00 0.0000E+00
C7 -2.5230E-04 -5.4946E-04
C8 0.0000E+00 0.0000E+00
C9 -1.9940E-04 -5.7068E-04
C10 2.0574E-05 -1.7423E-04
C11 0.0000E+00 0.0000E+00
C12 -1.1869E-05 -5.2445E-04
C13 0.0000E+00 0.0000E+00
C14 1.6056E-06 -3.3383E-04
C15 0.0000E+00 0.0000E+00
C16 -2.0501E-06 5.2332E-06
C17 0.0000E+00 0.0000E+00
C18 1.0889E-07 5.6462E-06
C19 0.0000E+00 0.0000E+00
C20 -1.1787E-07 0.0000E+00
Table 1-2
Second embodiment
Similar with first embodiment, the second embodiment of the present invention is as shown in Fig. 2 also include first to fourth free form surface Prism, illustrate by taking left side as an example, the first free curved surface prism and the 3rd free form surface rib on the left of Micro display element 2I Mirror includes 3 optical surfaces.For ease of expression, using inverse optical path direction, by human eye direction to Micro display element, light via Optical surface 21L is transmitted into the first free curved surface prism, incides and optical surface 21L is totally reflected back on optical surface 22L, and in light Anti- raw total internal reflection reaches optical surface 23L again on the 21L of face, is transmitted through optical surface 24L and enters the 3rd free curved surface prism, then Via optical surface 25L total internal reflections to optical surface 26L, passed through after being totally reflected again on optical surface 26L by optical surface 25L Inject to up on miniscope 2I.Unlike first embodiment, second is the third and fourth free song in embodiment Face prism is formed as one, or respectively formed after gluing be integrated, be aligned when being easily installed.
Each optical surface parameter according to a second embodiment of the present invention can represent by table 2 below -1 and table 2-2,
Surface type Radius Material X is eccentric Y is eccentric Z is eccentric Alpha is tilted
Diaphragm Sphere Infinitely 0 0 0 0
21 Sphere 243.1243 PMMA 0 0.000 37.113 -2.085
22 XY multinomials -59.7016 PMMA 0 0.000 42.209 -32.456
23 Sphere -24.5515 0 15.108 41.533 47.129
24 Sphere -20 PMMA 0 18.060 43.234 87.684
25 Sphere -142.2 PMMA 0 23.324 45.194 14.177
26 XY multinomials 10.22588 PMMA 0 28.302 39.512 -12.831
Display element Sphere Infinitely 0 32.000 53.170 0.000
Table 2-1
Wherein surface 22 and surface 26 are the Free Surface of XY polynomials, and each term coefficient is as shown in table 2-2
Surface 22 Surface 26
K 0 0
C1 0.0000E+00 0.0000E+00
C2 0.0000E+00 0.0000E+00
C3 -5.5632E-03 -1.6637E-02
C4 0.0000E+00 0.0000E+00
C5 5.6491E-04 -2.1873E-02
C6 0.0000E+00 0.0000E+00
C7 -3.4392E-04 2.1347E-05
C8 0.0000E+00 0.0000E+00
C9 -2.6616E-04 7.5567E-05
C10 1.6003E-05 -7.8927E-05
C11 0.0000E+00 0.0000E+00
C12 1.1341E-07 -2.5913E-04
C13 0.0000E+00 0.0000E+00
C14 4.4197E-06 -1.6109E-04
C15 0.0000E+00 0.0000E+00
C16 -7.8704E-08 7.5637E-06
C17 0.0000E+00 0.0000E+00
C18 -7.6329E-07 2.7544E-06
C19 0.0000E+00 0.0000E+00
C20 -1.8518E-07 0.0000E+00
Table 2-2
According to the abovementioned embodiments of the present invention, when using own curved surface prism as speculum, its lower edge does not protrude In the lower edge of the first and second free curved surface prisms, such setting can make the thickness of overall optical component by first and Two free curved surface prisms determine in the thickness on Micro display element direction, and are respectively implemented according to the above-mentioned of the present invention Mode, the preferable level that can reach about 8mm of thickness (as shown in dotted line in Fig. 1-2) of the first and second free curved surface prisms, The lightening of device is realized, in consideration of it, its weight could be arranged to the intermediate plate form of peripheral hardware completely, clip-like etc. can be passed through Structure is attached on all kinds of correcting spectacle lens of user's wearing (such as user with myopia correction glasses), can't be User increases excessive burden, so as to be applied to scene with a greater variety.
Particularly, due to two speculums in the plane of incidence in face of Micro display element towards tilted, in falling " eight " word Shape, sufficient space, described miniature display can be provided while device is lightening for the installation of Micro display element Element can select from all kinds of Micro display elements with high PPI, including but not limited to LCD type, LCOS types, OLED types, , can be by tearing open when the technology development of display element and such display element can be used as modular installation to exist Unload and changed as modular display element to realize, so that the nearly eye display device of the present invention can be all the time using most advanced Display element, if optical system is customized by user according to its visual demand, such length being provided with beneficial to device Phase uses.
To ensure picture quality, in first to fourth free curved surface prism of the various embodiments described above, at least all include one By the Free Surface of xy polynomials, and preferably, in the first and second free curved surface prisms, in Micro display element The face 12,22,32,42,52 of side total internal reflection be Free Surface, in the third and fourth free curved surface prism, remote The face 16,26,36,46,56 that Micro display element side performs total internal reflection is Free Surface.Further, will can own Surface all sets the Free Surface of xy polynomials preferably to optimize picture quality, but corresponding manufacturing cost will carry therewith It is high.
Variation
Different according to the abovementioned embodiments of the present invention, the speculum set in face of miniature display member 3I is a pair of spheric reflections Mirror, its reflecting surface is sphere and face Micro display element is set.Stated using inverse optical path direction, shown by human eye direction to miniature Show element, light is transmitted into the first free curved surface prism via optical surface 31L, incides and is totally reflected light echo on optical surface 32L Face 31L, and anti-raw total internal reflection occurs on optical surface 31L and arrives again at optical surface 32L, through optics after 32L is totally reflected Face 33L transmits the first free curved surface prism to spherical reflector 34L reflecting surface, is totally reflected to through optical surface 34L miniature On display 3I.When using spherical reflector, the distance of Micro display element 6I and spherical reflector can be pressed further Contracting, and because the weight of spherical reflector may be typically less than prism, can also further reduce the weight of device, but it is necessary It is considered that the installation difficulty of spherical reflector is slightly above prism.The nearly eye display device of the present invention is miniature aobvious when specifically used Show that element can be placed in external device as image display, its controller, image file memory, power supply etc., such as Shown in Fig. 4, external device is by being electrically connected to Micro display element, miniature display is powered and controlled to Micro display element Image on element is shown.
Further, external device may also include user interface and communication interface, to receive user instruction and and its He is communicated at equipment.Under a kind of form, external device can be such as PC, tablet personal computer, the universal meter such as smart mobile phone Equipment is calculated, various functions and application thereon are used equally for the display device of the present invention to be shown.By taking smart mobile phone as an example, its Including such as general processor including the memory of application and non-volatile memories, processor can realize communication and any number The application of amount is simultaneously used as controller.Memory can include the non-volatile and classes of semiconductors memory of volatile memory Part.User interface for operation can realize the function of user interface, communication interface such as wireless communication interface WIFI, indigo plant Tooth, NFC etc., and various known finite communication interfaces, can be communicated with miscellaneous equipment, receive the data from miscellaneous equipment Information.
Under another form, the components such as special controller and memory can be used in external device, more preferable to realize Display performance and the function of developing personalization, such as various commercial Applications.
When the Micro display element supports 3D display, nearly eye display device of the invention can support 3D display;Or By adding controllable shutter elements in the light path of the left and right sides, and realize 3D display.
According to the nearly eye display device of the present invention, realized based on the prism comprising Free Surface good under single image source Binocular displays effect, device are frivolous.As a kind of optional mode, when the nearly eye display device of the present invention has the profile of glasses And when being worn on user head, Micro display element is located exactly at the bridge of the nose, and the first and second discrete speculums now may be used The both sides for the bridge of the nose that is placed in effectively using the profile of user's face, the profile of nearly eye display device is formed as at the bridge of the nose can The flexible portion depression changed with wearer face type, makes Micro display element also can effectively press close to user's face, has to realize The product appearance of design sense provides advantage.
Described above is only embodiments of the invention, not makees any formal limitation to the structure of the present invention. Any simple modification, equivalent change and modification that every technical spirit according to the present invention is made to above example, still belongs to In the range of technical scheme.

Claims (7)

1. a kind of nearly eye display device of single image source dual-eye, including:
One Micro display element;
First free curved surface prism and the second free curved surface prism;
For receiving light that the Micro display element sends and reflexing to being located at for the first free curved surface prism positioned at left side First speculum in left side,
For receiving light that the Micro display element sends and reflexing to being located at for the second free curved surface prism positioned at right side Second speculum on right side,
The Micro display element is located on the center line of the first and second free curved surface prisms, and display surface is set perpendicular to the center line Put, it is relative and parallel with emergent pupil with first and second speculum;
Wherein, first free curved surface prism and the second free curved surface prism are symmetrical arranged relative to the center line, respectively including 3 Individual optical surface, wherein the first optical surface adjacent to the described first or second speculum is the light transmission plane of incidence, to Transflective The light that mirror reflection comes, the second optical surface close to emergent pupil is the/transmission plane that is all-trans, to through the first optical surface freedom of entry curved surface Light in prism carries out first time total internal reflection, and the light transmission through the 3rd the second secondary reflection of optical surface is gone out into the free form surface rib Mirror;
The reflecting surface lower edge position of first and second speculum is non-bulging in first and second free curved surface prism The second optical surface lower edge position, make the thickness of overall optical component by the first and second free curved surface prisms perpendicular to micro- Thickness on type display element direction determines.
2. nearly eye display device as claimed in claim 1, it is characterised in that
First speculum includes the 3rd free curved surface prism, and second speculum includes the 4th free curved surface prism;
Third and fourth free curved surface prism comprises at least the Free Surface of aspherical face type, and the described 3rd and the The position of four free curved surface prisms is symmetrical on the center line.
3. eye display device as claimed in claim 2 nearly, it is characterised in that third and fourth free curved surface prism can be with It is integrally formed.
4. nearly eye display device as claimed in claim 2, it is characterised in that the light of third and fourth free curved surface prism The plane of incidence is set relative to Micro display element, and tilted to the center line direction respectively.
5. nearly eye display device as claimed in claim 4, it is characterised in that in first to fourth free curved surface prism Each comprises at least three optical surfaces, and the focal power of two of which optical surface is different from another optical surface.
6. nearly eye display device as claimed in claim 1, it is characterised in that the nearly eye display device is formed as the outer of sheet Shape, and there is fixture.
7. nearly eye display device as claimed in claim 1, it is characterised in that the Micro display element is dismountable.
CN201610098482.8A 2016-02-23 2016-02-23 A kind of nearly eye display device of single image source dual-eye Active CN105572879B (en)

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WO2021068855A1 (en) * 2019-10-10 2021-04-15 华为技术有限公司 Display device module and head mounted display device
CN113341577B (en) * 2021-08-06 2021-12-10 深圳珑璟光电科技有限公司 Binocular near-to-eye display equipment

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