CN115308910A - Near-to-eye display device - Google Patents
Near-to-eye display device Download PDFInfo
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- CN115308910A CN115308910A CN202211063034.6A CN202211063034A CN115308910A CN 115308910 A CN115308910 A CN 115308910A CN 202211063034 A CN202211063034 A CN 202211063034A CN 115308910 A CN115308910 A CN 115308910A
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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
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Abstract
The invention discloses a near-eye display device, comprising: a light source module and an optical module; the light source module comprises a plurality of laser image sources; the laser image source is a VCSEL laser image source or a collimated light image source; the light source module is configured to: the image signals are subjected to digital-to-analog conversion and then loaded to each laser image source, so that each laser image source emits RGB laser beams; the optical module comprises a compound eye control chip and a projecting element array; the projecting element array comprises a plurality of projecting elements which are arranged on the compound eye control chip according to a preset arrangement rule; the optical module is configured to: and the compound eye control chip respectively controls each projecting piece to rotate within a preset angle range so as to project the RGB laser beams emitted by the corresponding laser image source to the eyes of the user through each projecting piece. The embodiment of the invention can greatly reduce the volume of the near-to-eye display device and reduce the angle error of light beam projection, thereby effectively improving the use experience of a user.
Description
Technical Field
The invention relates to the technical field of near-eye display, in particular to a near-eye display device.
Background
With the progress of display technology and people's desire for high technology, near-eye display technology has been widely applied to various fields of work and life, including Virtual Reality (VR), augmented Reality (AR), mixed Reality (MR), and the like. Near-eye displays are typically worn around the eyes of a user and are typically presented in the form of eyeglasses, i.e., the display screen is positioned relatively close to the eyes of the user to enable the user to travel in a virtual world or a combined virtual and real world.
At present, a light beam of a near-eye display device needs to be reflected or refracted for multiple times before being projected to eyes, so that the size of the display device is large, the comprehensive angle error of the light beam after being reflected or refracted for multiple times is large, and the user experience is poor.
Disclosure of Invention
The invention provides a near-eye display device, which aims to solve the technical problems that the existing near-eye display device is too large in size and large in light beam projection angle error, so that the user experience is poor.
An embodiment of the present invention provides a near-eye display device including:
a light source module and an optical module;
the light source module comprises a plurality of laser image sources; wherein the laser image source is a VCSEL laser image source or a collimated light image source;
the light source module is configured to: performing digital-to-analog conversion on image signals and loading the image signals to each laser image source so that each laser image source emits RGB laser beams;
the optical module comprises a compound eye control chip and a projecting element array;
the projecting element array comprises a plurality of projecting elements which are arranged on the compound eye control chip according to a preset arrangement rule; the projection piece adopts a 3D micro-galvanometer or a 3D scanning mechanism;
the optical module is configured to: and the compound eye control chip is used for respectively controlling each projecting piece to rotate within a preset angle range so as to project the RGB laser beams emitted by the corresponding laser image source to the eyes of a user through each projecting piece.
Furthermore, the light source module and the optical module are arranged in a split manner, and each projection piece reflects the RGB laser beams emitted by the corresponding laser image source to the eyes of the user in a light reflection manner.
Furthermore, the light source module and the optical module are arranged in a combined manner, and each projecting piece projects the RGB laser beams emitted by the corresponding laser image source to the eyes of the user in a direct light emitting manner.
Further, the projecting piece and the laser image source are in one-to-many corresponding relation.
Further, the compound eye control chip comprises a substrate and a control circuit, wherein the control circuit is carved on the substrate.
Further, the preset arrangement rules include equilateral triangles, squares and rectangles.
Further, the preset angle ranges from 0 ° to 180 °.
In the embodiment of the invention, the RGB laser beams are emitted by the laser image sources of the light source module, the deflection angle of the projection piece is controlled by the compound eye control chip, so that the RGB laser beams emitted by the corresponding laser image sources are projected to the eyes of a user by each projection piece, and the laser beams do not need to be reflected or refracted for multiple times before reaching the eyes of the user, thereby greatly reducing the volume of the near-to-eye display device, reducing the angle error of light beam projection and effectively improving the use experience of the user.
Drawings
Fig. 1 is a schematic structural diagram of a near-eye display device in which a light source module and an optical module are separately disposed according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an optical module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light source module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a near-eye display device provided by combining a light source module and an optical module according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a near-eye display device in which a light source module and an optical module are combined according to an embodiment of the present invention;
fig. 6 is a second schematic structural view of a near-eye display device in which a light source module and an optical module are separately disposed according to an embodiment of the present invention;
fig. 7 is a third schematic structural view of a near-to-eye display device in which a light source module and an optical module are separately disposed according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all 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 application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1-7, in an embodiment of the present invention, there is provided a near-eye display device shown in fig. 1, including:
a light source module 110 and an optical module 130;
in the embodiment of the present invention, the light source module 110 includes a plurality of Laser image sources 160, wherein the Laser image sources 160 are VCSEL (Vertical-Cavity Surface-Emitting Laser) Laser image sources or collimated light image sources; the optical module 130 is a fly-eye optical structure.
The light source module 110 is configured to: the image signals are subjected to digital-to-analog conversion and then loaded to each laser image source 160, so that each laser image source 160 emits an RGB laser beam;
in the embodiment of the present invention, the light source module 110 processes the image signal into a serial signal, and the serial signal is loaded into each laser image source 160 after digital-to-analog conversion to form each group of R, G, and B laser beams, each group of R, G, and B laser beams may be configured with one projecting element 120 correspondingly, or a plurality of groups of R, G, and B laser beams may be configured with one projecting element 120 correspondingly; the R, G, B laser beams of each group are used as light sources and cooperate with the deflection of each projecting element 120, so that image information corresponding to the image signal is imaged onto the eyes of the user.
The optical module 130 includes a compound eye control chip 140 and a projector array 170; wherein, the projecting part 120 adopts a 3D micro-oscillating mirror or a mechanism capable of performing 3D scanning;
in the embodiment of the present invention, the compound eye control chip 140 and the projecting element array 170 are both disposed on the optical module 130, the projecting element array 170 includes a plurality of projecting elements 120, and the plurality of projecting elements 120 are disposed on the compound eye control chip 140 according to a preset arrangement rule; each projecting element 120 in the projecting element array 170 is connected to the compound eye control chip 140, and the compound eye control chip 140 controls the turning angle of each projecting element 120 according to actual needs, so as to reflect (or directly project) the RGB laser beams emitted by the corresponding laser image source 160 to the human eyes 150 (user eyes) through the projecting elements 120.
The optical module 130 is configured to: the compound eye control chip 140 controls each projecting element 120 to rotate within a preset angle range, so as to project the RGB laser beams emitted from the corresponding laser image source 160 to the eyes of the user through each projecting element 120.
In the embodiment of the present invention, the serial laser image signal is synchronized with the deflection angle of the projecting element 120 controlled by the fly-eye control chip 140, for example, when the projecting element 120 rotates 50 ° to the right from the reference plane (the plane perpendicular to the line of the 0 ° viewing angle is the reference plane), the laser image incident on the projecting element 120 is the image content of the left 50 ° viewing angle, and the projecting element 120 rotates at a high speed, and the fly-eye optical structure composed of many regularly arranged projecting elements 120 reflects the light of the full viewing angle to the human eyes 150, so that the human eyes can see the complete picture.
It should be noted that the geometric dimension of the laser image source 160 is micron-sized, some are even smaller than one micron, the volume of the laser does not affect the sight of the human, and the image signal is loaded to the laser to form a laser beam, that is, the laser beam is used as the laser image source, and the laser beam is projected onto the retina of the human eye through the projecting element 120 to form a complete image.
According to the near-eye display device provided by the embodiment of the invention, the RGB laser beams are emitted by the laser image sources 160 of the light source module 110, the deflection angles of the projecting pieces 120 are controlled by the compound eye control chip, so that the RGB laser beams emitted by the corresponding laser image sources 160 are projected to the eyes of a user through the projecting pieces 120, and the laser beams do not need to be reflected or refracted for many times before reaching the eyes of the user, so that the size of the near-eye display device is greatly reduced, the angle error of light beam projection is reduced, and the use experience of the user can be effectively improved.
In one embodiment, the light source module 110 and the optical module 130 are separately disposed, and each of the projecting members 120 reflects the RGB laser beams emitted by the corresponding laser image source 160 to the user's eye by light reflection.
In the embodiment, the light reflective film is coated on the projecting member 120, the laser image source 160 is disposed beside the projecting member 120, and the laser image source 160 and the projecting member 120 have micron-sized geometric dimensions, so that the overall thickness can be within one millimeter.
In one embodiment, the light source module 110 and the optical module 130 are disposed in a combined manner, and each projecting element 120 projects the RGB laser beam emitted from the corresponding laser image source 160 to the eye of the user through direct light emission.
In this embodiment, the laser image source 160 may be directly disposed on the projecting member 120, and the projecting member 120 is changed from a light reflecting mode to a direct light emitting mode, so that the laser beam of the laser image source 160 may be directly projected onto the human eye.
The light source module 110 and the optical module 130 may be provided separately or integrally. The two setting modes have the advantages and the disadvantages of the manufacturing process, the split setting can simplify the control circuit of the galvanometer, and the combined setting can simplify the structure of the optical path. However, the combined and separated image forming effects are almost the same, and are not classified into primary and secondary ones.
In one embodiment, the projecting members 120 are in a one-to-many correspondence with the laser image sources 160.
In the embodiment of the present invention, when the R, G, B laser beams are formed by the laser image source 160, each group of R, G, B laser beams may be configured with one projecting element 120, and a plurality of groups of R, G, B laser beams may be configured with one projecting element 120. It can be understood that, when the projecting element 120 and the laser image source 160 are configured in a corresponding relationship of one to a plurality of laser image sources 160, the luminous fluxes of the R, G and B laser beams are larger, and the effect of increasing the imaging brightness can be achieved.
In one embodiment, fly-eye control chip 140 includes a substrate and control circuitry, which is depicted on the substrate.
In this embodiment, the substrate of the compound-eye control chip 140 is a substrate made of a transparent material and combined with a semiconductor material, and a control circuit is etched by using photolithography or a process with a processing precision equivalent to photolithography to obtain the compound-eye control chip 140, wherein the compound-eye control chip 140 is connected to each projecting element 120 and is used for controlling the projecting elements 120 to rotate at a high speed, so that the human eye 150 can obtain a larger field angle.
In one embodiment, the predetermined arrangement rules include equilateral triangles, squares, and rectangles.
In the embodiment of the present invention, the projecting element array 170 may include a plurality of projecting elements 120, and the arrangement rules of the projecting elements 120 may also be different, including regular arrangement manners such as equilateral triangle, square, and rectangle.
In one embodiment, the preset angle range is 0 ° to 180 °.
In the embodiment of the present invention, the laser image source 160 can be directly disposed on the projecting element 120 or disposed beside the projecting element 120, and if the number, the deflection angle, and the distribution area of the projecting element 120 are increased, so that the included angle between the projecting element 120 and the incident light beam is rotated between 0 ° and 180 °, human eyes can see an image with an infinite field angle close to 180 °.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
1. the thickness of the lens can reach within 1mm, and all near-to-eye display products can not achieve the low thickness at present;
2. although the existing array optical waveguide technology can be relatively light and thin, the existing array optical waveguide technology cannot be used for manufacturing a large field angle, the diagonal field angle is smaller than 50 degrees, the field angle of the near-to-eye display device of the embodiment of the invention can easily exceed 120 degrees, and the field angle is the largest in the existing VA/AR product;
3. the existing diffraction optical waveguide technology can also be light and thin, the color purity is very poor, and the phenomena of chromatic dispersion and rainbow are the difficult problems which are not solved all over the world at present. The embodiment of the invention adopts laser image signals, and because the bandwidth of each monochromatic laser is narrow, the color purity of the image is greatly improved, and the synthesized color is more gorgeous. Although the diffraction optical waveguide also adopts laser image signals, the diffraction angles of different colors are different, so that serious dispersion is generated, and the optical path of the compound eye structure of the embodiment of the invention has no diffraction, so that the inherent color purity of the laser signals is preserved;
4. the existing BB (BirdBanh) scheme has the unique advantage of bright color, does not have any movable eye frame, can distort an image when the eyes are moved up and down, left and right, and has a smaller volume than VR and a free-form surface AR but the minimum thickness of less than 15 mm. In the embodiment of the invention, each galvanometer has the function of displaying a complete picture, and images at all visual angles are optically reflected from each projecting element, so that the whole compound eye structure has an eye-moving frame in the direction.
5. All current VR/AR who uses laser image source all adopt millimeter level size's lens to do collimation in its light path, and the prism reflection of passing through millimeter level size many times again, not light whole size is huge, and the comprehensive angle error after the multiple reflection is very big. The embodiment of the invention adopts the laser image source 160 with micron-sized dimensions, and the laser image source is reflected by a plane at most once, so that the integral thickness dimension can be reduced to less than one millimeter, and the angle error of the image source can reach within 1'.
The foregoing is a preferred embodiment of the present invention, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present invention, and these modifications and embellishments are also regarded as the scope of the present invention.
Claims (7)
1. A near-eye display device, comprising:
a light source module and an optical module;
the light source module comprises a plurality of laser image sources; the laser image source is a VCSEL laser image source or a collimated light image source;
the light source module is configured to: performing digital-to-analog conversion on image signals and loading the image signals to each laser image source so that each laser image source emits RGB laser beams;
the optical module comprises a compound eye control chip and a projecting element array;
the projecting element array comprises a plurality of projecting elements which are arranged on the compound eye control chip according to a preset arrangement rule; the projection piece adopts a 3D micro-galvanometer or a 3D scanning mechanism;
the optical module is configured to: and the compound eye control chip is used for respectively controlling each projecting piece to rotate within a preset angle range so as to project the RGB laser beams emitted by the corresponding laser image source to the eyes of a user through each projecting piece.
2. The near-eye display device of claim 1, wherein the light source module and the optical module are separated, and each of the projection elements reflects the RGB laser beam emitted from the corresponding laser image source to the eye of the user in a light reflection manner.
3. The near-eye display device of claim 1, wherein the light source module and the optical module are disposed in a combined manner, and each of the projecting members projects RGB laser beams emitted from the corresponding laser image source to the eyes of the user through direct light emission.
4. The near-eye display device of claim 1 wherein the projecting element is in a one-to-many correspondence with the laser image source.
5. The near-eye display device of claim 1, wherein the compound-eye control chip comprises a substrate and control circuitry, the control circuitry being inscribed on the substrate.
6. The near-eye display device of claim 1, wherein the predetermined arrangement rules comprise equilateral triangles, squares, and rectangles.
7. The near-eye display device of claim 1, wherein the predetermined angle ranges from 0 ° to 180 °.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063034.6A CN115308910A (en) | 2022-08-31 | 2022-08-31 | Near-to-eye display device |
| TW111135551A TWI834299B (en) | 2022-04-02 | 2022-09-20 | A near-eye display device |
| US17/950,092 US11798448B1 (en) | 2022-04-02 | 2022-09-21 | Near-eye display device |
| EP22196948.8A EP4254041A1 (en) | 2022-04-02 | 2022-09-21 | Near-eye display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063034.6A CN115308910A (en) | 2022-08-31 | 2022-08-31 | Near-to-eye display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115308910A true CN115308910A (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211063034.6A Pending CN115308910A (en) | 2022-04-02 | 2022-08-31 | Near-to-eye display device |
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| Country | Link |
|---|---|
| CN (1) | CN115308910A (en) |
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- 2022-08-31 CN CN202211063034.6A patent/CN115308910A/en active Pending
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