CN109471259B - Near-eye display device - Google Patents
Near-eye display device Download PDFInfo
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- CN109471259B CN109471259B CN201710803622.1A CN201710803622A CN109471259B CN 109471259 B CN109471259 B CN 109471259B CN 201710803622 A CN201710803622 A CN 201710803622A CN 109471259 B CN109471259 B CN 109471259B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
Abstract
The invention relates to a near-eye display device, which comprises an imaging system and a first waveguide element. The image system is used for providing an image light beam, and the image light beam forms an image picture at the position of eyes of a user. The first waveguide element is disposed on the transmission path of the image beam and includes a first surface, a second surface, a first light incident end and a plurality of first light splitting surfaces. The first light-in end is positioned at one side of the first surface and the second surface, and the image light beam enters the first waveguide element through the first light-in end. The first light-splitting surfaces are disposed obliquely with respect to the first surface and the second surface. The first light splitting surfaces reflect the image light beams transmitted in the first waveguide element to the eyes. The first distances between the first light splitting surfaces on the side far from the first light incident end by taking the visual axis of direct vision of eyes as a datum line are larger along with the distance from the first light incident end, so that the situation of uneven brightness stripes in an image picture can be effectively improved.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a near-to-eye display device.
Background
Near-eye displays (NED) are the next generation killer class products with great development potential today. In recent years, with the development of micro-displays (i.e., the trend of higher resolution, smaller size and power consumption) and the development of cloud technology (i.e., the downloading of a large amount of information from the cloud at any time and place without the trouble of carrying a huge database), head-mounted displays have been developed as portable (portable) display devices, and other related fields such as industrial production, simulation training, stereoscopic display, medical treatment, sports and electronic games have grown to occupy important positions in addition to the military field.
Related applications of near-eye display technology can be currently categorized into augmented reality (augmented reality, AR) technology and Virtual Reality (VR) technology. For the augmented reality technology, related developers are currently working on how to provide good image quality on the premise of light weight and light volume of the display device.
The background section is only for the purpose of aiding in the understanding of the present invention and thus the disclosure of the background section may include some of the known art that does not form part of the understanding of those skilled in the art. The disclosure of the "background" section is not intended to represent the subject matter disclosed as one or more embodiments of the present invention, which may be known or appreciated by those skilled in the art prior to the application of the present invention.
Disclosure of Invention
The invention provides a near-eye display device which can effectively improve the situation that uneven brightness stripes appear in an image picture.
An embodiment of the invention provides a near-eye display device, which includes an imaging system and a first waveguide element. The image system is used for providing an image beam. The first waveguide element is disposed on the transmission path of the image beam and includes a first surface, a second surface, a first light incident end and a plurality of first light splitting surfaces. The first surface faces the eyes of the user, and the second surface is disposed opposite to the first surface. The first light-in end is positioned at the end part of the first waveguide element, and the image light beam enters the first waveguide element through the first light-in end. The first light splitting surfaces are arranged obliquely with respect to the first surface and the second surface, and are arranged from a side close to the first light entrance end to a side far from the first light entrance end. The first light splitting surfaces reflect the image light beams transmitted in the first waveguide element to the eyes. The first pitches between the portions of the first light splitting surfaces are larger as they are farther from the first light entrance end, where the first pitches refer to pitches in a direction parallel to the first surface.
In the near-eye display device of the embodiment of the invention, the design that the first pitches of the first light splitting surfaces on the side far from the first light inlet end are larger along with the distance from the first light inlet end is adopted, so that the overlapping area of the two adjacent first light splitting surfaces seen by eyes is reduced. Therefore, the problem of dark marks formed in the overlapping area seen by eyes in the image picture provided by the near-eye display device can be effectively solved.
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic perspective view of a near-eye display device according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of the near-eye display device of fig. 1.
Fig. 3 is a schematic cross-sectional view illustrating the relationship between the first waveguide element of fig. 1 and the eyes of a user.
Fig. 4 is a schematic partial cross-sectional view of the relationship of the first waveguide element of fig. 3 to a user's eye.
Fig. 5A is a schematic cross-sectional view of a relationship between a first waveguide element of a comparative embodiment and a user's eye.
Fig. 5B is a view of an image provided by the near-eye display device of the comparative embodiment of fig. 5A.
Fig. 6A is a schematic cross-sectional view of a relationship between a second waveguide element of another comparative embodiment and a user's eye.
Fig. 6B is a diagram of an image frame provided by the near-eye display device of the comparative embodiment of fig. 6A.
Fig. 7 is a diagram illustrating an image frame provided by the near-eye display device of the embodiment of fig. 1 to 4.
Detailed Description
The foregoing and other technical aspects, features and advantages of the present invention will become more apparent from the following detailed description of a preferred embodiment, which proceeds with reference to the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the invention.
Fig. 1 is a schematic perspective view of a near-eye display device according to an embodiment of the invention, fig. 2 is a schematic cross-sectional view of the near-eye display device of fig. 1, and fig. 3 is a schematic cross-sectional view illustrating a relationship between the first waveguide element of fig. 1 and eyes of a user. Referring to fig. 1 to 3, a near-eye display device 100 of the present embodiment includes an imaging system 110 and a first waveguide 120. The imaging system 110 is used for providing an image beam 112. In the present embodiment, the image system 110 includes a display 114 and a lens module 116. The display 114 is used for providing the image beam 112, and the lens module 116 is disposed on the transmission path of the image beam 112, between the display 114 and the first waveguide 120, and is used for projecting the image beam 112 at the position of the user's eye 50. Furthermore, in the present embodiment, the display 114 includes a light valve or a display panel, wherein the light valve is, for example, a digital micro-mirror device (DMD), a Liquid Crystal On Silicon (LCOS) panel, or other suitable spatial light modulator (spatial light modulator, SLM), and the display panel is, for example, a transmissive liquid crystal panel, an organic light-emitting diode display (emitting diode display, OLED display), a micro-light-emitting diode display (micro-LED display), or other suitable display. For the light valve or display panel that does not emit light, the light source module may be configured to illuminate the light valve or display panel that does not emit light, thereby generating the image beam 112. In addition, the lens module 116 may include one or more lenses or other beam delivery elements.
The first waveguide element 120 is disposed on the transmission path of the image beam 112, and includes a first surface 122, a second surface 124, a first light incident end E1, and a plurality of first light splitting planes B (six first light splitting planes B1, B2, B3, B4, B5, and B6 are shown in fig. 1 as an example, but not limited thereto). The first surface 122 faces the user's eye 50 and the second surface 124 is opposite the first surface 122. The first light-entering end E1 is located at an end of the first waveguide element 120, and the image beam 112 enters the first waveguide element 120 through the first light-entering end E1. The first light splitting surfaces B are disposed obliquely with respect to the first surface 122 and the second surface 124, and are arranged from a side close to the first light entrance end E1 to a side far from the first light entrance end E1. These first facets B reflect the image beam 112 propagating in the first waveguide element 120 to the eye 50.
In this embodiment, the near-eye display device 100 further includes a second waveguide 130 disposed beside the first light-incident end E1, along the transmission path of the image beam 112, and between the image system 110 and the first waveguide 120. The second waveguide element 130 includes a third surface 132, a fourth surface 134, a second light incident end E2, and a plurality of second light splitting planes C (four second light splitting planes C1, C2, C3, and C4 are illustrated in fig. 1). The fourth surface 134 is opposite to the third surface 132, and the second light incident end E2 is located at one side of the third surface 132 and the fourth surface 134, wherein the image beam 112 from the image system 110 enters the second waveguide 130 through the second light incident end E2. In the present embodiment, the lens module 116 is disposed on the transmission path of the image beam 112 and between the display 114 and the second waveguide 130.
The second light splitting surfaces C are disposed obliquely with respect to the third surface 132 and the fourth surface 134, and are arranged from a side closer to the second light incident end E2 to a side farther from the second light incident end E2. These second light splitting surfaces C transmit the image beam 112 transmitted in the second waveguide 130 to the first light incident end E1.
In the present embodiment, the first light splitting surface B and the second light splitting surface C are formed by, for example, a film coating that can partially penetrate and partially reflect the light beam, the film coating 123 forming the first light splitting surface B is sandwiched in the light guiding body 121 of the first waveguide element 120, and the film coating 133 forming the second light splitting surface C is sandwiched in the light guiding body 131 of the second waveguide element 130. The light guide bodies 121 and 131 are made of transparent materials, such as transparent plastic products or glass.
For example, after entering the second waveguide 130, a portion of the image beam 112 penetrates the second splitting plane C1 and is transmitted to the first waveguide 120, and a portion of the image beam 112 is transmitted to the second splitting plane C2. The second light splitting surface C2 reflects a portion of the image beam 112 to the first waveguide device 120, and transmits the portion of the image beam 112 to the second light splitting surface C3. The second light splitting surfaces C3 and C4 act on the image beam 112 as the second light splitting surface C2 acts on the image beam 112, and will not be repeated here. In this way, the second light splitting surfaces C1, C2, C3 and C4 can transmit the image beam 112 to the first waveguide device 120. In another embodiment, the second splitting plane C1 may reflect a portion of the image beam 112 to the first waveguide 120, and the portion of the image beam 112 penetrates the second splitting plane C1 to be transmitted to the second splitting plane C2, depending on the incident direction of the image beam 112.
Referring to fig. 3, in the present embodiment, the first waveguide element 120 further includes a reflective end surface 126 located at the first light incident end E1 and connecting the first surface 122 and the second surface 124. The image beam 112 from the second waveguide element 130 enters the first waveguide element 120 via the first surface 122 at the first light-entering end E1 and is then reflected by the reflecting end surface 126 towards the first light-splitting surfaces B. In the present embodiment, the reflective end surface 126 may be formed by coating a reflective coating film on the surface of the light guide body 121.
The image beam 112 reflected by the reflection end surface 126 is transmitted through the first waveguide 120 and transmitted to the first spectroscopic surface B1. The first light splitting surface B1 reflects the transmitted portion of the image beam 112 toward the first surface 122, and the image beam 112 then penetrates the first surface 122 and is transmitted toward the eye 50. The partial image beam 112 penetrates the first light splitting surface B1 and is transmitted to the first light splitting surface B2. The effect of the first light splitting surfaces B2, B3, B4, B5 and B6 on the image beam 112 is the same as the effect of the first light splitting surface B1 on the image beam 112, and will not be repeated here. In this way, the first light splitting surfaces B1, B2, B3, B4, B5 and B6 can sequentially reflect the image beam 112 toward the eye 50.
In the present embodiment, the first pitches L1 of the first light splitting surfaces B on the side far from the first light incident end E1 with the visual axis D of the eye 50 as the reference line become larger as the first pitches become farther from the first light incident end E1, wherein the first pitches L1 refer to the pitches between the first light splitting surfaces B in the direction parallel to the first surface 122. In the present embodiment, these first pitches L1 are pitches in the x direction. In the present embodiment, the near-eye display device 100 can be regarded as being in a space formed by an x direction, a y direction and a z direction, wherein the x direction is an arrangement direction of the first light splitting surface B, the y direction is an arrangement direction of the second light splitting surface C, the z direction is a direction perpendicular to the x direction and the y direction, and the x direction is perpendicular to the y direction.
In the present embodiment, the boundary between each first light splitting surface B and the first surface 122 (which extends along the y direction, for example) is perpendicular to the boundary between each second light splitting surface C and the third surface 132 (which extends along the x direction, for example). In addition, in the present embodiment, the image beam 112 is linearly polarized, and the polarization direction of the image beam 112 when entering the second waveguide 130 is parallel to the extending direction (i.e. y direction) of each boundary between the first light splitting surface B and the first surface 122.
Fig. 4 is a schematic partial cross-sectional view of the relationship of the first waveguide element of fig. 3 to a user's eye. Referring to fig. 1, 3 and 4, in the present embodiment,the near-eye display device 100 conforms to: H.gtoreq.R (tan (. Beta) 2 )-tan(β 1 ) With the visual axis D of the eye 50 directly viewing as the reference line, the distance between the front projection end point P1 of the first a-beam splitting surface BA on the second surface 124 near the end point P3 of the first surface 122 and the end point P2 of the first B-beam splitting surface BB on the second surface 124, R is the distance between the eye 50 and the second surface 124, and β 1 Is the angle beta between the line N1 from the forward projection end point P1 to the eye 50 and the visual axis D of the direct vision of the eye 50 2 Is the angle between the line of sight N2 of the first a-ray splitting surface BA near the end point P3 of the first surface 122 to the eye 50 and the visual axis D1 of the eye 50. Specifically, if the first B-beam splitting plane BB is disposed at the position of the dashed line B 'in fig. 4 (corresponding to the position of the dashed line B' in fig. 3), and the end point P2 near the second surface 124 overlaps the orthographic projection end point P1, the eye 50 sees the overlapping portion of the first a-beam splitting plane BA and the first B-beam splitting plane BB when viewing from the line of sight between the line N1 and the line N2, and the overlapping portion causes the dark streak K in the vertical direction as shown in fig. 5B to appear in the image frame viewed by the eye. However, in the present embodiment, since the near-eye display device 100 conforms to h+r (tan (β 2 )-tan(β 1 ) Therefore, the first B splitting plane BB is just on the extension line of the connecting line N2 or at the left of the extension line near the end point P2 of the second surface 124, and when the eye 50 is seen from the line of sight between the connecting line N1 and the connecting line N2, the first a splitting plane BA does not overlap with the first B splitting plane BB, so that the image seen by the eye 50 has no dark streak K as shown in fig. 7.
In the present embodiment, the near-eye display device 100 conforms to: l is equal to or greater than W.cot (θ), wherein L is a second pitch L of any two adjacent first light splitting surfaces B on the visual axis D on one side close to the first light incident end E1 with the visual axis D of the eye 50 as a reference line, and the second pitch L is a pitch in a direction parallel to the first surface 122, in this embodiment, a pitch in the x direction; w is the distance between the first surface 122 and the second surface 124, which is alsoThe average thickness of the first waveguide element 120, θ is the angle of inclination of any two adjacent first light splitting planes B with respect to the first surface 122. When the near-eye display device 100 meets l+w·cot (θ), the first light splitting planes B do not overlap each other in a direction perpendicular to the first surface 122 (i.e., in the z direction in this embodiment). In this way, referring to fig. 3, when the eye 50 looks straight or looks far to the right in fig. 3, the first light splitting surfaces B do not overlap, so the near-eye display device 100 can make the user see the image picture without the dark streak K as shown in fig. 7. On the other hand, the near-eye display device 100 corresponds to h+r (tan (β 2 )-tan(β 1 ) Or L1.gtoreq.W.cot (. Theta.)) +R (tan (. Beta.) 2 )-tan(β 1 ))。
Referring to fig. 2, in the present embodiment, the near-eye display device 100 conforms to:wherein M is a third pitch M of any two adjacent second light splitting surfaces C, the third pitch M is a pitch in a direction parallel to the third surface 132 (in this embodiment, a pitch in the y direction), and V is a distance between the third surface 132 and the fourth surface 134, that is, an average thickness of the second waveguide element 130>For this purpose, any two adjacent second light splitting surfaces C have an inclination angle with respect to the third surface 132. When the near-eye display device 100 is in line +.>In this case, the second light splitting surfaces C do not overlap each other in a direction perpendicular to the third surface 132 (i.e., in the z direction in the present embodiment), so that the image provided by the near-eye display device 100 may not have the dark streak K 'as shown in fig. 6B, but may provide the image without the dark streak K' as shown in fig. 7.
In addition, the ambient light from the external object (i.e. the object on the side facing the second surface 124) can penetrate through the first waveguide element 120 and be transmitted to the user's eye 50, wherein the ambient light can penetrate through the light guiding body 121 and partially penetrate through the first light splitting plane B, so that the user can see the display screen provided by the near-to-eye display device 100 and the external object at the same time, thereby achieving the effect of amplifying the real world.
Fig. 5A is a schematic cross-sectional view illustrating a relationship between the first waveguide element and the eyes of a user according to the comparative embodiment, and fig. 5B is an image frame provided by the near-eye display device according to the comparative embodiment of fig. 5A. Referring to fig. 5A and 5B, in the present comparative embodiment, the near-eye display device does not satisfy h+r (tan (β) 2 )-tan(β 1 ) Therefore, when the visual axis D of the eye 50 is directed to the left, the adjacent first light splitting surfaces B partially overlap in the visual direction, and the image light beam passes through the first light splitting surfaces B twice in the overlapping area, a dark streak K in the vertical direction as shown in fig. 5B is generated in the image screen. On the other hand, in the present comparative example, since the near-eye display device does not satisfy l+w·cot (θ), the adjacent first light splitting surfaces B partially overlap in the z direction, and therefore, the dark streak K in the vertical direction as shown in fig. 5B is generated in the image screen.
In contrast, the near-eye display device 100 of the embodiment of fig. 1 to 4 conforms to h+r (tan (β) 2 )-tan(β 1 ) And L ≡ w· cot (θ), the image screen without the dark streak K in the vertical direction as shown in fig. 7 can be provided.
Fig. 6A is a schematic cross-sectional view illustrating a relationship between a second waveguide element and eyes of a user according to another embodiment, and fig. 6B is an image frame provided by the near-eye display device according to the embodiment of fig. 6A. Referring to fig. 6A and 6B, in the present comparative embodiment, the near-eye display device does not conform to the followingTherefore, the second splitting plane C is partially overlapped in the z direction, and the image beam passes through the first splitting plane B twice in the overlapped area, so that a dark streak K' in the horizontal direction as shown in fig. 6B is generated in the image frame.
In contrast, the near-eye display device 100 of the embodiment of fig. 1-4 conforms to Thus, the image frame without the horizontal dark streak K' shown in FIG. 7 can be provided.
In summary, the near-eye display device 100 of the embodiment of fig. 1 to 4 can provide the image frame without the horizontal dark fringes K' and the vertical dark fringes K as shown in fig. 7, so that the near-eye display device 100 can effectively improve the uneven brightness fringes in the image frame, and further make the brightness of the image frame seen by the eyes of the user uniform.
In summary, in the near-eye display device according to the embodiment of the invention, the design that the first pitches of the first light splitting surfaces on the side far from the first light incident end with the visual axis of direct vision of the eyes as the reference line are larger as the distance from the first light incident end is larger is adopted, so that the overlapping area of the adjacent first light splitting surfaces seen by the eyes is reduced. Therefore, the problem of dark marks formed in the overlapping area seen by eyes in the image picture provided by the near-eye display device can be effectively solved.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, i.e., all simple and equivalent changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein. Further, it is not necessary for a person to achieve all of the objects, advantages or features disclosed in the present invention to be satisfied with any one embodiment or claim of the present invention. Furthermore, the abstract and the title of the invention are provided solely for the purpose of assisting patent document retrieval and are not intended to limit the scope of the claims. Furthermore, references to "first," "second," etc. in this specification or in the claims are only intended to name or distinguish between different embodiments or ranges of the element, and are not intended to limit the upper or lower limit on the number of elements.
Description of the reference numerals
50: eyes (eyes)
100: near-eye display device
110: image system
112: image beam
114: display device
116: lens module
120: first waveguide element
121. 131: light guide body
122: a first surface
123. 133: coating film
124: a second surface
126: reflecting end face
130: second waveguide element
132: third surface
134: fourth surface
B. B1, B2, B3, B4, B5, B6: a first light-splitting surface
B': dotted line
BA: first A light splitting surface
BB: first B light splitting surface
C. C1, C2, C3, C4: second light splitting surface
D: visual axis
E1: first light inlet end
E2: a second light incident end
H: spacing of
K. K': dark lines
L1: first distance of
L: second distance
M: third distance
N1, N2: connecting wire
P1: orthographic projection endpoint
P2, P3: endpoint(s)
R, V, W: distance of
x, y, z: direction of
β 1 、β 2 : included angle
θ、Inclination angle
Claims (11)
1. A near-eye display device is characterized in that the near-eye display device comprises an imaging system and a first waveguide element,
the image system is used for providing an image beam;
the first waveguide element is configured on the transmission path of the image light beam and comprises a first surface, a second surface, a first light incident end and a plurality of first light splitting surfaces,
the first surface is directed towards the eyes of the user;
the second surface is arranged relative to the first surface;
the first light inlet end is positioned at the end part of the first waveguide element, and the image light beam enters the first waveguide element through the first light inlet end;
the plurality of first light-splitting surfaces are disposed obliquely with respect to the first surface and the second surface and are arranged from a side close to the first light-incident end to a side far from the first light-incident end, the plurality of first light-splitting surfaces reflect the image light beam transmitted in the first waveguide element to the eye, wherein a plurality of first pitches between a part of the first light-splitting surfaces become larger as being further away from the first light-incident end, the plurality of first pitches refer to pitches in a direction parallel to the first surface,
wherein the near-eye display device conforms to: l is equal to or larger than W.cot (θ), where L is a second pitch of any two adjacent first light splitting surfaces, the second pitch is a pitch in a direction parallel to the first surface, W is a distance between the first surface and the second surface, and θ is an inclination angle of the any two adjacent first light splitting surfaces relative to the first surface.
2. The near-eye display device of claim 1, wherein the near-eye display device conforms to: H.gtoreq.R (tan (. Beta) 2 )-tan(β 1 ) With the visual axis of the direct vision of the eye as a datum line, the visual axis being closer to the first light inlet end and farther from the first light inlet end in one side away from the first light inlet end or any two adjacent first light splitting surfaces on the visual axisThe first light-splitting plane A and the first light-splitting plane B are respectively, H is the distance between the orthographic projection end point of the first light-splitting plane A on the second surface and the end point of the first light-splitting plane B on the second surface, R is the distance between the eyes and the second surface, and beta is the distance between the eyes and the second surface 1 Beta is the included angle between the connecting line from the front projection end point to the eye and the visual axis of the direct vision of the eye 2 And the included angle between the connecting line of the first A light splitting surface, which is close to the end point of the first surface, to the eyes and the visual axis of the direct vision of the eyes is defined.
3. The near-eye display device of claim 1, wherein the plurality of first light splitting surfaces do not overlap each other in a direction perpendicular to the first surface.
4. The near-eye display device of claim 1, further comprising a second waveguide device disposed beside the first light-incident end and located on a transmission path of the image beam and between the image system and the first waveguide device, wherein the second waveguide device comprises a third surface, a fourth surface, a second light-incident end and a plurality of second light-splitting surfaces,
the fourth surface is opposite to the third surface;
the second light-entering end is positioned on one side of the third surface and the fourth surface, wherein the image light beam from the image system enters the second waveguide element through the second light-entering end;
the plurality of second light splitting surfaces are arranged obliquely with respect to the third surface and the fourth surface and are arranged from a side close to the second light incident end to a side far from the second light incident end, and the plurality of second light splitting surfaces enable the image light beams transmitted in the second waveguide element to be transmitted to the first light incident end.
5. The near-eye display device of claim 4, wherein the near-eye display device conforms to:wherein M is the third interval between any two adjacent second light splitting surfaces, the third interval is the interval in the direction parallel to the third surface, V is the distance between the third surface and the fourth surface, and->Is the inclination angle of any two adjacent second light splitting surfaces relative to the third surface.
6. The near-eye display device of claim 4, wherein the plurality of second light splitting surfaces do not overlap each other in a direction perpendicular to the third surface.
7. The near-eye display device of claim 4, wherein an intersection of each first light splitting surface and the first surface is perpendicular to an intersection of each second light splitting surface and the third surface.
8. A near-eye display device as claimed in claim 7, wherein the image beam is linearly polarized and the polarization direction of the image beam upon entering the second waveguide element is parallel to the extension direction of each first light splitting plane at the boundary with the first surface.
9. The near-eye display device of claim 1 wherein the first waveguide element further comprises a reflective end surface at the first light entrance end and connecting the first surface and the second surface, the image beam entering the first waveguide element via the first surface at the first light entrance end and then being reflected by the reflective end surface toward the plurality of first light splitting surfaces.
10. The near-eye display device of claim 1 wherein the imaging system comprises a display and a lens module,
the display is used for providing the image light beam;
the lens module is arranged on the transmission path of the image light beam, is positioned between the display and the first waveguide element, and is used for imaging the image light beam in the eye.
11. The near-eye display device of claim 10, wherein the display comprises a light valve or a display panel.
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| Title |
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| "半透膜阵列式平板波导式头戴显示器光学系统设计";呼新荣等;《光学学报》;20140930;第34卷(第9期);第0922001-1至0922001-6页 * |
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