CN109425985B - Near-eye display system and near-eye display - Google Patents
Near-eye display system and near-eye display Download PDFInfo
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- G02B27/01—Head-up displays
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Abstract
The invention discloses a near-eye display system and a near-eye display, belonging to the technical field of augmented reality imaging; the near-eye display system comprises a curved surface assembly, the curved surface assembly comprises at least one curved surface, the inner surface of the curved surface faces the eyes of a user, the outer surface of the curved surface is arranged by moving away from the inner surface by a thickness distance along a main optical axis, and the inner surface is coated with a light partial transmission partial reflection material; an imaging device disposed in proximity to an eye of a user; the imaging device further comprises a light source and a micro-display, wherein the light source is used for irradiating the micro-display, and light beams emitted by the micro-display enter the eyes of a user after being reflected by the curved surface in the curved surface component; the curved surface also serves to transmit external light into the user's eye. The beneficial effects of the above technical scheme are: the field angle of the near-eye display device can be improved, meanwhile, the compact and light structure is kept, the viewing experience and the attractiveness of a user are improved, and the process complexity and the manufacturing cost of the display device are reduced.
Description
Technical Field
The invention relates to the technical field of augmented reality imaging, in particular to a near-eye display system and a near-eye display.
Background
With the development of Augmented Reality (AR) technology, the market for portable devices and wearable devices applied to AR technology is also rapidly growing. Among the hardware implementations applying AR technology, head-Mounted Display (HMD) and Near-Eye Display (NED) are the most efficient implementations that bring the best experience to the user in the prior art.
So-called Head Mounted Displays (HMDs), which may also be referred to as glasses type displays or video glasses because of their appearance like glasses, may achieve different display effects in AR technology by sending optical signals to the eyes through various head mounted display devices.
A so-called near-eye display (NED) is a Head Mounted Display (HMD) that can project images directly into the eyes of a viewer. The display screen of the NED is within 10 cm from the eyeball of a human, and the image which is close to the display screen is generally invisible to the human eye, but the image can be focused on the retina of the human eye through a specific lens array designed in the NED optical system and then processed through a visual nervous system, so that the image with a virtual large width can be presented in front of the eyes of a user, and various different display effects of the AR technology can be realized.
In the related art near-eye display, the size of a Field of View (FOV) determines the size of a Field of View of the near-eye display, and generally, the larger the Field of View is. In the near-eye display, the increase of the field angle is often accompanied by the increase of the complexity of the hardware device, so that the whole near-eye display is heavier, and the comfort of the user experience is weakened.
Disclosure of Invention
According to the above problems in the prior art, a technical solution of a near-eye display system and a near-eye display is provided, which aims to improve the field of view of a near-eye display device while maintaining the portability and comfort of the device, and reduce the process complexity of the whole display device.
The technical scheme specifically comprises the following steps:
a near-eye display system, comprising:
the curved surface component comprises at least one curved surface, the inner surface of the curved surface faces towards the eyes of a user, the outer surface of the curved surface is arranged by offsetting the inner surface by a preset distance along the direction of a main optical axis, and the inner surface is coated with a light partial transmission partial reflection material;
an imaging device disposed proximate to an eye of the user;
the imaging device further comprises a light source and a micro-display, wherein the light source is used for illuminating the micro-display, and a light beam emitted by the light source enters the eyes of the user after being reflected by the curved surface in the curved surface component;
the curved surface is used for transmitting external light into the eyes of the user.
Preferably, the near-eye display system, wherein the curved surface of the curved surface component forms a free-form surface form, and a relationship between coordinates (x, y, z) of the free-form surface form in an XYZ coordinate system is obtained according to the following polynomial processing:
wherein the content of the first and second substances,
z is a numerical value representing the free form surface form;
c is used to represent the curvature;
k is a conic coefficient;
n is used to represent the number of coefficients in the polynomial.
Preferably, the near-eye display system, wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
and a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface.
Preferably, the near-eye display system, wherein the thickness of the curved surface is not uniformly distributed in an xy coordinate space.
Preferably, the near-eye display system, wherein the curved surface component comprises a curved surface;
the micro-display in the imaging device is a passive micro-display;
the light source is arranged in front of the eyes of the user;
the micro display is perpendicular to the light source and arranged above the light source, and the display surface of the micro display is arranged towards the curved surface component;
a polarizing beam splitter is disposed between the light source and the microdisplay.
Preferably, in the near-to-eye display system, the curved surface component includes a plurality of curved surfaces arranged in sequence from top to bottom, and the plurality of curved surfaces are in head-to-tail contact with each other;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
and a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface.
Preferably, the near-eye display system, wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface;
coating a polarization selective polymer film on the inner surface of the curved surface;
interposing a polarizer between the microdisplay and the curved surface assembly, the polarizer being disposed parallel to the microdisplay;
the polarizer is used for converting unpolarized light emitted by the light source into polarized light.
Preferably, the near-eye display system, wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
one end of the micro display is abutted against the curved surface, and the other end of the micro display is fixed through a mechanical mounting seat, so that the display surface of the micro display faces towards the eyes of the user;
a reflector is placed on the forehead of the user, the reflector is fixed through the mechanical mounting seat and forms a second preset angle with the forehead of the user, and the reflector is used for reflecting light emitted by the light source in the micro-display to the inner surface of the curved surface.
A near-eye display is provided, wherein the near-eye display system is arranged corresponding to each eye of a user;
the micro-display in each near-eye display system is arranged outside or above the corresponding eye.
Preferably, the near-eye display, wherein the micro-displays of the two near-eye display systems are integrated in one display device;
the display device is located above the center of the two eyes of the user.
The beneficial effects of the above technical scheme are: the near-eye display system can expand the field angle (over 50 degrees) of near-eye display equipment, meanwhile keeps the whole display structure compact and light, improves the light propagation efficiency, saves energy, reduces the process complexity and the manufacturing cost of the display equipment, comprehensively expands the attractive space of the industrial design of AR glasses, and improves the wearing comfort and the use experience of a user.
Drawings
FIG. 1 is a schematic diagram of a general structure of a near-eye display system according to a preferred embodiment of the present invention;
FIGS. 2-7 are schematic diagrams of near-eye display systems in various embodiments of the invention;
fig. 8-10 are schematic diagrams of near-eye displays for binocular vision of a user using a near-eye display system, in various embodiments of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
In light of the above-described problems in the prior art, there is now provided a technical solution of a near-eye display system, which is particularly suitable for use in an HMD device or an NED device, and is used in AR technology.
As shown in fig. 1, in a preferred embodiment of the present invention, the general structure of the near-eye display system specifically includes:
a curved surface member including at least one curved surface 11, an inner surface 11a of the curved surface 11 being disposed toward an eye 12 of a user, an outer surface 11b of the curved surface being disposed apart from the inner surface 11a along a main optical axis by a distance (the distance being a thickness in the form of a free-form surface), the concave surface 11a being coated with a light transreflective material having a specific reflection/transmission ratio, and the convex surface 11b being uncoated with any material;
an imaging device 2 disposed in proximity to the user's eye 12;
the above-mentioned imaging device 2 further includes a light source for illuminating the micro-display and a micro-display (the relationship between the light source and the micro-display will be described in detail later), and a light beam emitted from the light source enters the eye 12 of the user after being reflected by the curved surface 11 in the curved surface component;
the curved surface 11 also serves to transmit external light into the eye 12 of the user.
Specifically, in the present embodiment, the near-Eye display system described above is designed to increase the field angle (FOV) and Eye Movement Box (EMB) of the HMD device or NED device by the integrated configuration of the plurality of optical components.
In the structure shown in fig. 1, at least one curved surface 11 (one curved surface 11 in fig. 1) of the curved surface components is a free-form curved surface, also called a free-form curved surface form, which may include several forms such as a ring (toroid), a non-ring or biconical (atom/biconic), a non-cylinder (acryl), an off-axis parabolic (off-axis parabola), a gradual change (anamorph), and a polynomial, and the display content of a virtual image generated by the AR technology is transferred onto an inner surface 11a of the free-form curved surface form, and 13 in fig. 1 is a front view of the curved surface 11. The inner surface 11a in the curved surface 11 is a part of a transmissive partially reflective surface, and the free-form surface collimates and reflects the light beam 3 emitted from the imaging device 2 in fig. 1 to infinity by a predetermined curvature of the free-form surface, thereby creating a parallel light beam 4 to simulate the light generated by a real object in a real environment, in other words, the free-form surface can reflect the light from the imaging device 2 and transmit the light from an external environment to the user's eye, so that the "virtual" light and the "real" light can be combined and transmitted to the user's eye, creating a more closely displayed "augmented reality" user experience. In the present embodiment, the ratio between the reflected light and the transmitted light described above is determined by the polymer coating layer coated on the inner surface 11a of the curved surface 11. Specifically, a polymer film may be further coated on the inner surface 11a, and an anti-reflection material may be coated on the outer surface 11b to reduce glare.
In this embodiment, the light source in the imaging device 2 is used to illuminate the microdisplay, and the light source may be an LED light source, a laser, or other type of illuminator. In order to achieve full color display effects, a combination of light sources comprising three light sources of red, green and blue is required to illuminate the microdisplay.
In this embodiment, for an active type microdisplay, such as an Organic Light-Emitting Diode (OLED) display, the Light source can be integrated inside the microdisplay, i.e. the microdisplay itself has an illuminator, and no additional external Light source is needed. However, some conventional NED's employ a micro-display, which is typically passive, and then need to be illuminated by an external light source for imaging purposes.
In a preferred embodiment of the present invention, the relationship between the coordinates (x, y, z) in the XYZ coordinate system of the free-form surface formed by the curved surface 11 is obtained according to the following polynomial equation:
wherein the content of the first and second substances,
z is a numerical value representing the form of a free-form surface;
c is used to represent curvature;
k is a conic coefficient;
n is used to represent the number of coefficients in the polynomial.
Specifically, in the present embodiment, the relationship between the coordinates (x, y, z) of the free-form surface form in the XYZ coordinate axes is as shown in the above polynomial (1), where x and y are the coordinates (x, y) of the XOY coordinate system in which the free-form surface form is located, and z is a coordinate on a coordinate axis perpendicular to the direction of the free-form surface form. Specifically, the origin coordinate from the XOY coordinate is a point in the free-form curved surface formed by the main optical axis passing through the curved surface 11 in the optical design, and the position thereof is determined according to different specific designs.
In the above polynomial (1), AiIs the coefficient of the ith expansion polynomial term, which polynomial (1) is a power series of x and y, where the first term is x and the second term is y, followed by x y, etc. A polynomial with 2 terms has an order of 1,3 terms has an order of 2,4 terms has an order of 3, and so on. The coordinate values x and y are divided by the normalized radius, and thus the coefficients in the polynomial (1) are dimensionless.
Each coefficient in the above polynomial (1) is optimized so that the outgoing beam is collimated and reaches the maximum field angle within the phase difference range. And the thickness of the free-form surface is kept consistent in the xy coordinate axis physical space, and the part is optimized to have the minimum curvature as much as possible so that the appearance of the eyepiece is normal as much as possible.
The first embodiment is as follows:
as shown in fig. 2, the curved surface component includes a curved surface 11;
the microdisplay 21 in the imaging device 2 is an active microdisplay, and a light source is included in the microdisplay 21;
the micro-display 21 abuts against the forehead 22 of the user through the isolation material, and forms a first preset angle alpha with the forehead 22 of the user, and the display surface of the micro-display 21 faces the curved surface component;
a mechanical mounting 23 is provided between the microdisplay 21 and the curved surface 11 for fixing the relative position of the microdisplay 21 and the curved surface 11.
In particular, in the present embodiment, the microdisplay 21 is an active type display, such as an OLED display, and therefore the microdisplay 21 has an illuminator as a light source, and this design does not require an additional light source in the display device, so that the whole display device is more compact.
In this embodiment, the micro display 21 is positioned against the user's forehead 22 by some sealing and isolating material on the back, and a first predetermined angle α is formed between the micro display 21 and the user's forehead 22. While the micro-display 21 and the curved surface 11 are connected by a mechanical mount 23 to fix both.
In this embodiment, the first preset angle α is determined according to various factors, such as the specific implementation form of the curved surface 11, the optimization result under different viewing angle requirements, and the height of the micro-display.
The near-eye display system in the embodiment is applied to the near-eye display device, the field angle of the near-eye display system can still exceed 50 degrees on the premise that the near-eye display system is easy to wear and the device is compact, and the size of the eye movement frame can reach 8mm by 8 mm. The manufacturing process of the free-form curved surface is also very convenient, and the plastic material with the refractive index of 1.3-1.9 is formed by diamond turning or injection molding. Therefore, the design of the near-eye display system in the technical scheme of the invention is more suitable for mass production, and the cost is lower than that of the traditional near-eye display or head-mounted display.
Example two:
as shown in fig. 3, on the basis of the first embodiment, the thickness of the curved surface 11 may be unevenly distributed in the xy coordinate space, i.e., the outer surface 11b takes the form of a free-form surface different from the inner surface 11a, so as to be specially provided for users with visual defects such as myopia or hyperopia. For example, to make the near-eye display system more suitable for users with impaired vision, a transflective polymer may be coated on the inner surface 11a of the curved surface 11 to be responsible for collimating and combining light, and some optical treatment dedicated to configuring glasses for users with impaired vision may be performed on the outer surface 11b of the curved surface 11, so that the thickness of the curved surface 11 varies as described above. After the optical processing, the inner surface 11a of the curved surface 11 needs to be optimized to eliminate the distortion and deformation which may be caused by the optical processing, so as to ensure the image quality observed by the user through the near-eye display system.
Example three:
as shown in fig. 4, the curved surface component includes a curved surface 11;
the microdisplay 21 in the imaging device 2 is a passive microdisplay;
the light source is disposed in front of the user's eye 12;
the micro-display 21 is perpendicular to the light source 45 and arranged above the light source, and the display surface 41 of the micro-display 21 is arranged towards the curved surface 11 in the curved surface component;
a polarizing beam splitter 42 is arranged between the light source and the microdisplay 21.
Specifically, in the present embodiment, the Micro-Display 21 is a passive Micro-Display, such as a Liquid Crystal Display (LCD), a Liquid Crystal On Silicon (LCOS), a Digital Micro-Mirror Device (DMD), a Micro-electromechanical Systems (MEMS) scanner, or an actuated fiber bundle (actuated fiber bundle). Since the micro-display 21 is a passive display, and its interior does not have a light source, it needs to add an additional external light source to illuminate it, and the external light source may be an LED, a laser, or other type of illuminator, as described above.
In this embodiment, a polarization beam splitter 42(PBS) is further disposed between the light source and the microdisplay 21, an incident surface 44 of the polarization beam splitter 42 faces an exit surface of the light source, a surface of the polarization beam splitter 42 adjacent to the incident surface 44 faces the display surface 41 of the microdisplay 21, a polarization splitting surface 43 is disposed inside the polarization beam splitter 42 at a forty-five degree angle with respect to the incident surface 44, and the splitting surface 43 is configured to reflect one type of polarized light and transmit the other type of polarized light, for example, configured to reflect S-polarized light and transmit P-polarized light. Then when the polarized S light from the light source is reflected by the beam splitter prism 43 in the polarization beam splitter 42, the display content from the microdisplay 21 is carried by the reflected light after several reflections/transmissions of the optical path, and its polarized light is changed in type (for example, from S light to P light) so as to be transmitted through the beam splitter prism 43 and not reflected, the transmitted light reaches the curved surface 11 and is focused to infinity and reflected into the user' S eye 12, so that the user observes the display content imaged and displayed on the display surface 41 of the microdisplay 21.
Example four:
in the application of the general HMD and NED, it is important to increase the angle of view of the display device. However, as the angle of view increases, the curved surfaces in the curved surface assembly are required to have a greater curvature, which makes the appearance of the eyepiece on the display device less natural and take on a shape similar to an "insect eye".
To solve this problem, as shown in fig. 5, on the basis of the second embodiment, the curved surface assembly includes a plurality of curved surfaces 11 arranged in sequence from top to bottom, and the plurality of curved surfaces 11 are in contact with each other end to end, and by using the cascade array formed by the plurality of curved surfaces, each small curved surface can increase the curvature to optimize the local optical power of the corresponding light beam, so as to improve the overall field angle without affecting the appearance of the eyepiece.
Other configurations in this embodiment are similar to those in the second embodiment, for example, the microdisplay 21 in the imaging device 2 is an active microdisplay, and the light source is included in the microdisplay;
the micro-display 21 is abutted against the forehead 22 of the user through the isolation material, and forms a first preset angle alpha with the forehead 22 of the user, and the display surface of the micro-display 21 faces the curved surface component;
a mechanical mount 23 is provided between the microdisplay 21 and the curved surface 11 for fixing the relative position of the microdisplay and the curved surface.
Example five:
one of the drawbacks of the near-eye display system in the second embodiment is that the curved surface 11 may partially reflect the display content of the microdisplay 21 and transmit the display content to the outside environment, thereby exposing the display content to other users, and the curved surface needs to transmit the external ambient light to the inside of the near-eye display system, so that the viewing privacy of the users cannot be guaranteed.
In this case, in this embodiment, as shown in fig. 6, the inner surface 11a of the curved surface 11 is coated with a polarization-selective polymer film 61, which polarization-selective polymer film 61 is capable of totally reflecting light of one polarization (which may be designed, for example, as total reflection of S-light or P-light) without transmission, while a polarizer 62 is arranged between the microdisplay 21 and the curved surface 11 in the curved assembly, in particular before the microdisplay 21, which polarizer 62 may be a linear optical polarizer or a circular polarizer, or another suitable type of polarizer. Taking a linear polarizer as an example, the polarizer 62 can convert unpolarized light emitted from the microdisplay 21 into polarized light that is totally reflected by the inner surface 11a of the curved surface 11, so that a user can observe 50% of the illumination light, with 50% of the loss coming from the polarizer, thus avoiding loss of light on the curved surface 11. Therefore, the near-eye display system in the embodiment can provide the same optical efficiency as that of the previous embodiment, simultaneously eliminates the problem of lack of privacy of display contents, and guarantees the privacy of users.
Example six:
the embodiment is another way to solve the user privacy problem based on the second embodiment. In the present embodiment, as shown in fig. 7, the curved surface component includes a curved surface 11;
the microdisplay 21 in the imaging device 2 is an active microdisplay, and a light source is included in the microdisplay 21;
one end of the micro-display 21 is abutted against the curved surface 11, and the other end is fixed through a mechanical mounting seat 23, so that the display surface of the micro-display 21 faces towards the eyes of a user;
a reflector 71 is placed on the forehead 22 of the user, the reflector 71 is also fixed by the mechanical mount 23 and forms a second predetermined angle β with the forehead 22 of the user, and the reflector 71 is used for reflecting the light emitted from the light source in the micro-display 21 onto the curved surface 11.
In this embodiment, the second preset angle β also needs to be determined according to various factors, such as the specific implementation form of the curved surface 11, the optimization result under different viewing angle requirements, and the height of the micro-display.
In particular, in the present embodiment, the mirror 71 is disposed to reflect light from the micro display 21 onto the curved surface 11, and the mirror is inclined at the second preset angle β, so that light emitted from the micro display 21 can be collected and reflected with the highest light efficiency. Such a structure can also prevent the display content from leaking to the external environment and being known by other users, thereby ensuring the viewing privacy of the users.
The first to sixth embodiments are all optical structures of a near-eye display system for realizing the production of single-eye observation of a user. In the following embodiments, in order to realize a display for binocular viewing, improvements are required to the near-eye display system in the above embodiments, specifically:
example seven:
as shown in fig. 8, a pair of near-eye displays applying binocular vision of the user is provided, in which a near-eye display system is provided corresponding to each eye of the user;
the microdisplays 21 in each near-eye display system are respectively positioned outside (as shown in fig. 8) or above (as shown in fig. 9) the corresponding eye 12.
Specifically, in the present embodiment, each of the above-described near-eye display systems includes one micro display 21 included in the imaging device 2 and the curved surface 11 included in the curved surface component, and the remaining configurations may be set according to practical circumstances with reference to the above-described embodiments one to six.
In the present embodiment, the light beam emitted from the micro-display 21 illuminates the curved surface 11 in front of each eye 12, each curved surface 11 respectively collimates and reflects the light, and the light of the virtual image and the light in the external environment are combined and finally transmitted to the two eyes of the user for display, so that the user can observe the display content in the near-eye display with the two eyes.
In this embodiment, the two micro displays 21 may be simultaneously located at the side of the eyes of the user (as shown in fig. 8) or simultaneously located above the eyes of the user (as shown in fig. 9), and the display contents displayed by the two micro displays 21 may be completely the same or different, so as to create a binocular three-dimensional imaging view of the user.
In this embodiment, when the display contents of the two microdisplays 21 are completely the same, the distance between the two curved surfaces 11 needs to be adjusted according to the pupil distance of the two eyes of the user and the related information such as the eye movement frame, so as to avoid the viewing obstacles, such as vertigo, caused by the incomplete alignment of the two display images, to the user, thereby improving the viewing experience of the user.
Example eight:
to further solve the problem of viewing obstacles, such as vertigo, caused by the fact that the displayed images of the two microdisplays are not perfectly aligned to the user, in the present embodiment, the microdisplays of the two near-eye display systems are integrated into one display device 101 (as shown in fig. 10), i.e. one display device 101 is common to both near-eye display systems, and some additional optical elements may be added between the display device 101 and the curved surface 11 to split and guide the light onto the two curved surfaces 11, thereby realizing the binocular visual experience of the user.
In summary, the present invention provides a near-eye display system design applied to an HMD device and an NED device in an AR technology, and the near-eye display system is designed to be a relatively compact structure, and simultaneously, a relatively large field angle (over 50 degrees) is achieved, and an eye movement frame is greater than 8mm × 8mm, so that the viewing experience of a user is better. Meanwhile, all optical components in the near-eye display system can be arranged on the mechanical mounting seat, so that the whole system is easier to mechanically mount and package, and the structure is more firmly fixed.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A near-eye display system, comprising:
the curved surface component comprises at least one curved surface, the inner surface of the curved surface is arranged towards the eyes of a user, the outer surface of the curved surface is arranged by offsetting the inner surface by a thickness distance along the direction of a main optical axis, and the inner surface is coated with a light partial transmission partial reflection material;
an imaging device disposed proximate to an eye of the user;
the imaging device further comprises a light source and a micro-display, wherein the light source is used for illuminating the micro-display, and a light beam emitted by the light source enters the eyes of the user after being reflected by the curved surface in the curved surface component;
the curved surface is used for transmitting external light into the eyes of the user;
the curved surface assembly comprises a plurality of curved surfaces which are sequentially arranged from top to bottom, and the curved surfaces are in head-to-tail contact;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
and a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface.
2. The near-eye display system of claim 1 wherein the curved surface is formed of a free-form surface form whose relationship between coordinates (x, y, z) in an XYZ coordinate system is obtained in accordance with the following polynomial process:
wherein the content of the first and second substances,
z is a numerical value representing the free form surface form;
c is used to represent curvature;
k is a conic coefficient;
n is used to represent the number of coefficients in the polynomial.
3. The near-eye display system of claim 1 wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
and a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface.
4. The near-eye display system of claim 3 wherein a free-form surface form of the inner surface of the curved surface is not consistent with the free-form surface form of the outer surface of the curved surface such that a thickness of the curved surface is not evenly distributed in an xy coordinate space.
5. The near-eye display system of claim 1 wherein the curved surface component comprises a curved surface;
the micro-display in the imaging device is a passive micro-display;
the light source is arranged in front of the eyes of the user;
the micro display is perpendicular to the light source and arranged above the light source, and the display surface of the micro display is arranged towards the curved surface component;
a polarizing beam splitter is disposed between the light source and the microdisplay.
6. The near-eye display system of claim 1 wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
the micro display is abutted against the forehead of the user through the isolation material and forms a first preset angle with the forehead of the user, and the display surface of the micro display is arranged towards the curved surface assembly;
a mechanical mounting seat is arranged between the micro-display and the curved surface and used for fixing the relative position of the micro-display and the curved surface;
coating a polarization selective polymer film on the inner surface of the curved surface;
interposing a polarizer between the microdisplay and the curved surface assembly, the polarizer being disposed parallel to the microdisplay;
the polarizer is used for converting unpolarized light emitted by the light source into polarized light.
7. The near-eye display system of claim 1 wherein the curved surface component comprises a curved surface;
the micro display in the imaging device is an active micro display, and the light source is included in the micro display;
one end of the micro display is abutted against the curved surface, and the other end of the micro display is fixed through a mechanical mounting seat, so that the display surface of the micro display faces towards the eyes of the user;
a reflector is placed on the forehead of the user, the reflector is fixed through the mechanical mounting seat and forms a second preset angle with the forehead of the user, and the reflector is used for reflecting light emitted by the light source in the micro-display to the inner surface of the curved surface.
8. A near-eye display, wherein a near-eye display system according to any one of claims 1-7 is provided for each eye of the user;
the micro-display in each near-eye display system is arranged outside or above the corresponding eye.
9. The near-eye display of claim 8, wherein the microdisplays in both of the near-eye display systems are integrated in one display device;
the display device is located above the center of the two eyes of the user.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762925.3A CN109425985B (en) | 2017-08-30 | 2017-08-30 | Near-eye display system and near-eye display |
| PCT/CN2018/100674 WO2019042133A1 (en) | 2017-08-30 | 2018-08-15 | Near-eye display system and near-eye display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710762925.3A CN109425985B (en) | 2017-08-30 | 2017-08-30 | Near-eye display system and near-eye display |
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| Publication Number | Publication Date |
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| CN109425985A CN109425985A (en) | 2019-03-05 |
| CN109425985B true CN109425985B (en) | 2020-08-28 |
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| CN201710762925.3A Active CN109425985B (en) | 2017-08-30 | 2017-08-30 | Near-eye display system and near-eye display |
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| CN (1) | CN109425985B (en) |
| WO (1) | WO2019042133A1 (en) |
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| CN111999889A (en) * | 2019-05-11 | 2020-11-27 | 京东方科技集团股份有限公司 | Curved lens and display device |
| CN114008515A (en) * | 2019-06-20 | 2022-02-01 | 萤火维度有限公司 | Head-mounted augmented reality system, device and equipment |
| CN110515212B (en) * | 2019-09-27 | 2021-12-14 | 北京耐德佳显示技术有限公司 | Near-to-eye display system |
| CN110780447A (en) * | 2019-12-05 | 2020-02-11 | 杨建明 | Optical system for augmented reality glasses |
| CN111158150A (en) * | 2020-02-10 | 2020-05-15 | Oppo广东移动通信有限公司 | Lens assembly and head-mounted display device |
| CN111948820B (en) * | 2020-07-10 | 2021-04-27 | 东南大学 | Method for rapidly calculating holographic waveguide display light effect |
| TWI796878B (en) * | 2021-12-17 | 2023-03-21 | 宏碁股份有限公司 | Augmented reality display device |
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| Publication number | Publication date |
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| WO2019042133A1 (en) | 2019-03-07 |
| CN109425985A (en) | 2019-03-05 |
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