Augmented reality display device and manufacturing method

Abstract

The invention discloses an augmented reality display device and a manufacturing method, and the device comprises a micro-display device which is used for displaying an image; the collimation device is used for carrying out collimation operation on the light of the display image to form collimated light; the waveguide device is used for receiving the collimated light and emitting the collimated light after changing the propagation direction of the light; and the transmittance regulation and control layer is used for compensating the output brightness of each display area of the augmented reality display device, so that the light emitting brightness uniformity of each display area meets a preset brightness uniformity threshold value, and each display area comprises at least one pixel. According to the embodiment of the invention, the transmittance regulation and control structure is arranged in the augmented reality display device, and the transmittance regulation and control structure is used for carrying out brightness compensation on each display area, so that the display effect of the augmented reality display device is effectively improved, and the augmented reality display device has practical application value.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an augmented reality display device and a manufacturing method thereof. Background Art

[0002] With the continuous development and innovation of display technology, augmented reality (AR) display devices have gradually entered people's lives. In terms of augmented reality, optical waveguide technology is an indispensable step. By using a flat optical waveguide with a diffraction grating, the image emitted by the light source component is transmitted and the pupil is expanded to the human eye, allowing users to see the real world while observing the virtual image superimposed on the world projected by the light source component.

[0003] However, in practical applications, augmented reality display devices based on optical waveguide technology generally have the problem of poor brightness uniformity. Summary of the invention

[0004] In order to solve at least one of the above problems, a first embodiment of the present invention provides an augmented reality display device, comprising:

[0005] A micro display device for displaying images;

[0006] A collimating device, used for collimating the light of the display image to form collimated light;

[0007] A waveguide device, used for receiving the collimated light and changing the propagation direction of the light before emitting it; and

[0008] The transmittance regulating layer is used to compensate the output brightness of each display area of ​​the augmented reality display device so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

[0009] For example, in the augmented reality display device provided in some embodiments of the present application, the augmented reality display device further includes a cover plate arranged on a side of the waveguide device close to the collimation device, and the waveguide device includes a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate;

[0010] The transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one;

[0011] The transmittance regulating layer is arranged on a side of the cover plate close to the waveguide device, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate, and the thickness of at least two compensation parts of the transmittance regulating layer are different.

[0012] For example, in the augmented reality display device provided in some embodiments of the present application, the waveguide device includes at least two sub-waveguide devices of different colors, each sub-waveguide device includes a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate;

[0013] The transmittance regulating layer includes a plurality of transmittance regulating sublayers corresponding one-to-one to the sub-waveguide devices, each transmittance regulating sublayer includes a plurality of compensation parts corresponding one-to-one to each display area, each compensation part is used to compensate for the output brightness of the display area of ​​the corresponding sub-waveguide device, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

[0014] For example, in the augmented reality display device provided in some embodiments of the present application, the augmented reality display device further includes a cover plate arranged on a side of the waveguide device close to the collimating device, and in a direction from near to far from the cover plate, the waveguide device includes a first sub-waveguide device, a second sub-waveguide device and a third sub-waveguide device;

[0015] The transmittance regulating layer includes a first transmittance regulating sublayer corresponding to the first sub-waveguide device, a second transmittance regulating sublayer corresponding to the second sub-waveguide device, and a third transmittance regulating sublayer corresponding to the third sub-waveguide device;

[0016] The first transmittance regulating sublayer is arranged on a side of the cover plate close to the first sub-waveguide device, and an orthographic projection of the first transmittance regulating sublayer on the waveguide plate of the first sub-waveguide device covers an orthographic projection of a corresponding outcoupling grating on the waveguide plate of the first sub-waveguide device;

[0017] The second transmittance regulating sublayer is arranged on a side of the first sub-waveguide device close to the second sub-waveguide device, and the orthographic projection of the second transmittance regulating sublayer on the waveguide plate of the second sub-waveguide device covers the orthographic projection of the corresponding outcoupling grating on the waveguide plate of the second sub-waveguide device;

[0018] The third transmittance regulating sublayer is arranged on a side of the second sub-waveguide device close to the third sub-waveguide device, and the orthographic projection of the third transmittance regulating sublayer on the waveguide plate of the third sub-waveguide device covers the orthographic projection of the corresponding outcoupling grating on the waveguide plate of the third sub-waveguide device.

[0019] For example, in the augmented reality display device provided in some embodiments of the present application, the waveguide device includes at least one sub-waveguide device, the transmittance regulating layer includes transmittance regulating sub-layers arranged in a one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device includes a waveguide plate, an in-coupling grating and an out-coupling grating arranged on the waveguide plate, and a planarization layer covering the out-coupling grating, and the refractive index of the planarization layer is less than the refractive index of the out-coupling grating;

[0020] The transmittance regulating sublayer is arranged on the planarization layer, and includes a plurality of compensation parts corresponding to each display area one by one, each compensation part is used to compensate for the output brightness of the corresponding display area, the thickness of at least two compensation parts of each transmittance regulating sublayer is different, and the orthographic projection of the transmittance regulating sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding out-coupling grating on the waveguide plate.

[0021] For example, in the augmented reality display device provided in some embodiments of the present application, the waveguide device includes at least one sub-waveguide device, the transmittance regulating layer includes transmittance regulating sub-layers arranged in a one-to-one correspondence with the sub-waveguide devices, and each sub-waveguide device includes a waveguide plate, and a reflective coupling-in grating and a reflective coupling-out grating arranged on a side of the waveguide plate away from the collimating device;

[0022] The transmittance regulating sublayer is arranged on a side of the sub-waveguide device close to the collimation device, and includes a plurality of compensation parts corresponding to each display area one by one, each compensation part is used to compensate for the output brightness of the corresponding display area, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different. The orthographic projection of the transmittance regulating sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding out-coupling grating on the waveguide plate.

[0023] For example, in the augmented reality display device provided in some embodiments of the present application, the transmittance regulating layer is a polymer, an inorganic substance or a metal oxide, and the thickness of the transmittance regulating layer is greater than or equal to 100 nanometers and less than or equal to 3 micrometers.

[0024] For example, in the augmented reality display device provided in some embodiments of the present application, the transmittance regulating layer is an electric control panel disposed between the collimating device and the waveguide device, and compensates the output brightness of each display area of ​​the waveguide device in response to the loaded voltage;

[0025] The orthographic projection of the electric control panel on the waveguide device covers the orthographic projection of each display area on the waveguide device.

[0026] For example, in the augmented reality display device provided in some embodiments of the present application, the transmittance regulating layer is a liquid crystal panel, including a first substrate, and a driving circuit layer, a first electrode, a liquid crystal layer, a second electrode, and a second substrate arranged on the first substrate, and the liquid crystal layer is driven by the driving circuit layer in response to the voltage loaded by the first electrode and the second electrode to compensate the output brightness of each display area of ​​the waveguide device;

[0027] The waveguide device includes at least one sub-waveguide device, and each sub-waveguide device includes a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate.

[0028] For example, in an augmented reality display device provided in some embodiments of the present application, the augmented reality display device includes a first cover plate arranged on a side of the liquid crystal panel close to the collimating device, and a second cover plate arranged on a side of the waveguide device away from the collimating device, and the coupling-in grating of the sub-waveguide device is a reflective coupling-in grating, and the coupling-out grating is a reflective coupling-out grating;

[0029] The first cover plate is reused as the second substrate of the liquid crystal panel;

[0030] A waveguide plate of a sub-waveguide device closest to the collimating lens among the at least one sub-waveguide device is reused as a first substrate of the liquid crystal panel.

[0031] For example, in the augmented reality display device provided in some embodiments of the present application, the transmittance regulating layer is an electrochromic panel, including a third electrode, an electrochromic layer and a fourth electrode, and the electrochromic layer is adjusted in response to the voltage loaded on the third electrode and the fourth electrode to compensate for the output brightness of each display area of ​​the waveguide device.

[0032] For example, in the augmented reality display device provided in some embodiments of the present application, the augmented reality display device further includes a detection device for detecting the actual light output brightness of the waveguide device in real time;

[0033] The transmittance regulating layer compensates each display area of ​​the waveguide device according to the actual light output brightness.

[0034] A second embodiment of the present invention provides a method for manufacturing the augmented reality display device described in the first embodiment, comprising:

[0035] A waveguide device is formed to receive collimated light formed by the collimation device performing a collimation operation on a display image displayed by the micro-display device and to emit the collimated light after changing the propagation direction of the light;

[0036] A transmittance regulating layer is formed to compensate the output brightness of each display area of ​​the augmented reality device so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

[0037] For example, in the manufacturing methods provided in some embodiments of the present application, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on the waveguide plate;

[0038] After forming the waveguide device, the manufacturing method further comprises: forming a cover plate on a side of the waveguide device close to the collimating device;

[0039] The forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on a side of the cover plate close to the waveguide device, patterning the transmittance regulating material layer to form a transmittance regulating layer, the transmittance regulating layer including a plurality of compensation parts corresponding one-to-one to each display area, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate, and the thickness of at least two compensation parts of the transmittance regulating layer are different.

[0040] For example, in the manufacturing methods provided in some embodiments of the present application, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on a waveguide plate, forming a planarization layer covering the out-coupling grating, and the refractive index of the planarization layer is less than the refractive index of the out-coupling grating; the forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on the planarization layer, and patterning the transmittance regulating material layer to form a transmittance regulating layer;

[0041] The transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

[0042] For example, in the manufacturing methods provided in some embodiments of the present application, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on a side of the waveguide plate away from the collimating lens; the forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on a side of the waveguide plate close to the collimating lens, and patterning the transmittance regulating material layer to form a transmittance regulating layer;

[0043] The transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

[0044] The beneficial effects of the present invention are as follows:

[0045] In view of the existing problems, the present invention develops an augmented reality display device and a manufacturing method. By setting a transmittance regulating structure in the augmented reality display device, the transmittance regulating structure is used to perform brightness compensation for each display area, thereby improving the brightness uniformity of each display area of ​​the augmented reality display device and improving the display effect of the augmented reality device, thereby compensating for the problems existing in the prior art and having practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic diagram showing the structure of an augmented reality display device in the related art is shown;

[0048] Figure 2 A schematic diagram showing the structure of an augmented reality display device according to an embodiment of the present invention is shown;

[0049] Figure 3 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0050] Figure 4 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0051] Figure 5 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0052] Figure 6 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0053] Figure 7 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0054] Figure 8 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0055] Fig. 9 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0056] Fig.10 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0057] Fig.11 A schematic diagram showing the structure of an augmented reality display device according to another embodiment of the present invention;

[0058] Fig.12 A flow chart showing a method for manufacturing an augmented reality display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0060] It should be noted that the terms “on…”, “formed on…” and “disposed on…” described herein may indicate that one layer is directly formed or disposed on another layer, or may indicate that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers. In this article, unless otherwise specified, the term “located on the same layer” used means that two layers, parts, components, elements or parts can be formed by the same patterning process, and the two layers, parts, components, elements or parts are generally formed of the same material. In this article, unless otherwise specified, the expression “patterning process” generally includes steps such as coating, exposure, development, etching and stripping of photoresist. The expression “one-time patterning process” means a process of forming patterned layers, parts, components, etc. using a mask.

[0061] In related technologies, such as Figure 1 As shown, an augmented reality display device based on optical waveguide technology generally includes a microdisplay device 10, a collimating device 20, a waveguide device 30, and a cover plate 40, wherein the waveguide device 30 includes an optical waveguide plate 31, an in-coupling grating 32, and an out-coupling grating 33. The waveguide device 30 transmits the image light emitted from the microdisplay device 10 collimated by the collimating device 20 and expands the pupil to the human eye, thereby forming a display effect of superimposing a virtual image on the real world. In practical applications, the augmented reality display device has the problem of poor brightness uniformity. It is extremely difficult to optimize the microdisplay device or the waveguide device, and it is difficult to obtain an augmented reality display device with high brightness uniformity.

[0062] In view of the above situation, if Figure 2 As shown, one embodiment of the present invention provides an augmented reality display device, comprising:

[0063] A micro display device 10, used for displaying images;

[0064] A collimating device 20, used for collimating the light of the display image to form collimated light;

[0065] A waveguide device 30, used for receiving the collimated light and changing the propagation direction of the light before emitting it; and

[0066] The transmittance regulating layer 50 is used to compensate the output brightness of each display area of ​​the augmented reality display device so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

[0067] In this embodiment, the waveguide device 30 includes an optical waveguide plate 31, an in-coupling grating 32 and an out-coupling grating 33, and the augmented reality display device includes a cover plate 40 for protecting the in-coupling grating 32 and the out-coupling grating 33 of the waveguide device 30. The specific optical path is: the display image output by the micro display device 10 is the required virtual image information, the collimating device 20 performs collimation operation on the light of the virtual image information, and converts the light of each field angle therein into parallel light, and changes the propagation direction of the light through the in-coupling grating 32 on the waveguide device 30 and enters the optical waveguide plate 31, so that the parallel light of each field angle is totally reflected in the optical waveguide plate 31, propagates along the optical waveguide plate 31 to reach the out-coupling grating 33, and the out-coupling grating 33 changes the propagation direction of the light, so that the light is no longer totally reflected and transmitted in the optical waveguide plate 33, and the light is emitted from the optical waveguide plate 33, expands along the propagation direction, and enters the eyes of the observer after being coupled out from the optical waveguide plate 32; considering that the augmented reality display in this process The problem of poor brightness uniformity in the display device, for example, the brightness of the light after passing through the optical waveguide plate presents an irregular distribution. This embodiment is based on the actual display brightness difference of the augmented reality display device, which is divided into multiple display areas. For example, a brightness detection device is used to perform brightness detection to obtain the actual brightness value, divide the display area, and determine the brightness compensation value of each display area. The display area includes one or more pixels. The compensation brightness of each display area is determined according to the brightness difference of each display area, and then compensation is performed through the set transmittance control layer 50, so that the uniformity of the light output brightness of each display area meets the preset brightness uniformity threshold. For example, the uniformity of light output reaches 70% to meet the needs of the augmented reality display device. It is worth noting that the brightness uniformity threshold is set based on the actual application scenario and application requirements, and this embodiment does not make specific limitations on this.

[0068] It should be noted that the present application does not specifically limit the specific structure and setting position of the transmittance regulating layer. Those skilled in the art should select the appropriate structure and setting position according to the specific application scenario, so as to achieve brightness compensation for different display areas by setting the transmittance regulating layer as the design criterion, which will not be repeated here.

[0069] This embodiment provides a transmittance control structure in the augmented reality display device, and uses the transmittance control structure to perform brightness compensation for each display area, thereby improving the brightness uniformity of each display area of ​​the augmented reality display device and improving the display effect of the augmented reality device, thereby compensating for the problems existing in the prior art and having practical application value.

[0070] In an optional embodiment, if Figure 3As shown, the augmented reality display device also includes a cover plate 40 arranged on a side of the waveguide device 30 close to the collimation device 20, the waveguide device 30 includes a waveguide plate 31, and a coupling grating 32 and a coupling grating 33 arranged on the waveguide plate 31; the transmittance regulation layer 50 includes a plurality of compensation parts 51 corresponding to each display area one by one; the transmittance regulation layer 50 is arranged on a side of the cover plate 40 close to the waveguide device 30, the orthographic projection of the transmittance regulation layer 50 on the waveguide plate 31 covers the orthographic projection of the coupling grating 33 on the waveguide plate 31, and the thickness of at least two compensation parts 51 of the transmittance regulation layer 50 is different.

[0071] In this embodiment, the brightness of each display area of ​​the augmented reality display device is compensated by a transmittance regulating layer 50 disposed on the side of the cover plate 40 facing the waveguide device 30. Specifically, the transmittance regulating layer is a polymer, an inorganic substance or a metal oxide, for example, the polymer is a film layer containing an OD value, for example, the metal oxide is ITO, and for example, the inorganic substance is SiN. In this embodiment, compensation parts of different film thicknesses are formed according to the compensation brightness of different display areas, and each display area corresponds to a compensation part. The thickness of each compensation part relative to the cover plate is different. For example, a display area with a larger brightness to be compensated has a corresponding thicker compensation part, or a display area with a smaller brightness to be compensated has a corresponding thinner compensation part. The thickness of the transmittance regulating layer is greater than or equal to 100 nanometers and less than or equal to 3 micrometers. The waveguide plate of the waveguide device of the present embodiment is high-refractive-index glass or plastic, and the refractive index of the waveguide plate is greater than or equal to 1.7 and less than or equal to 2.1; the coupling-in grating and the coupling-out grating of the waveguide device are coupling gratings based on surface relief, the period of the coupling grating is of the sub-wavelength order, greater than or equal to 250nm and less than or equal to 500nm, and the height of the grating relative to the waveguide plate is greater than or equal to 40nm and less than or equal to 450nm; the coupling-in grating and the coupling-out grating of the waveguide device are coupling gratings based on volume holography, the period of the coupling grating is of the sub-wavelength order, greater than or equal to 250nm and less than or equal to 500nm, and the height of the grating relative to the waveguide plate is greater than or equal to 1um and less than or equal to 30um; the coupling grating can be a high-refractive-index imprinted glue or a high-refractive-index glass, the refractive index of the coupling grating is greater than or equal to 1.7 and less than or equal to 2.1, and the morphology of the coupling grating can be a rectangular grating, a tilted grating, a blazed grating or a metasurface grating.

[0072] In this embodiment, if Figure 3As shown, the augmented reality display device is a monochrome display device. The augmented reality display device calculates to determine the compensation brightness according to the monochrome brightness detected during monochrome display, and realizes brightness compensation through each compensation part of the transmittance control layer arranged on the side of the cover plate facing the waveguide device. The orthographic projection area of ​​each compensation part of the transmittance control layer on the light guide plate is greater than or equal to the orthographic projection area of ​​the coupling-out grating on the light guide plate, that is, the orthographic projection of the coupling-out grating on the light guide plate falls within the orthographic projection of each compensation part on the light guide plate, thereby ensuring compensation for each display area of ​​the augmented reality display device. During the manufacturing process, a transmittance regulating material layer is first deposited on a side of the cover plate close to the waveguide device, and then the transmittance regulating material layer is patterned to form a transmittance regulating layer, wherein the transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, and the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate. Different compensation degrees of the transmittance regulating layer form different thicknesses according to the brightness value to be compensated of the corresponding display area. For example, grayscale exposure is performed using photoresist to obtain photoresists of different thicknesses in different display areas, and finally dry etching is performed to transfer the height of the photoresist to the transmittance regulating material layer, so that the compensation parts of the transmittance regulating layer form different heights, thereby having different transmittances in display areas at different positions.

[0073] In this embodiment, if Figure 4 As shown, the augmented reality display device can also be a color display device, and the waveguide device 30 includes a plurality of monochromatic sub-waveguide devices of different colors: for example, a red sub-waveguide device 310 includes a waveguide plate 311, and an in-coupling grating 312 and an out-coupling grating 313 arranged on the waveguide plate 311; for example, a green sub-waveguide device 320 includes a waveguide plate 321, and an in-coupling grating 322 and an out-coupling grating 323 arranged on the waveguide plate 321; for example, a blue sub-waveguide device 330 includes a waveguide plate 331, and an in-coupling grating 332 and an out-coupling grating 333 arranged on the waveguide plate 331. The augmented reality display device calculates and determines the corresponding compensation brightness according to the monochromatic brightness detected during each monochromatic display, determines the compensation brightness of the color display device according to the compensation brightness of each monochromatic color, and realizes brightness compensation through each compensation part of the transmittance regulating layer arranged on the side of the cover plate facing the waveguide device. The manufacturing process of this embodiment is similar to that of the aforementioned embodiment, and will not be repeated here.

[0074] It is worth noting that the present embodiment does not specifically limit the types of the coupling-in grating and the coupling-out grating of the waveguide device. The coupling-in grating and the coupling-out grating can be provided in a matching manner or separately. For example, at least one of the coupling-in grating and the coupling-out grating can be a transmission grating or a reflection grating. In the case of a reflection grating, a cover plate for encapsulating and protecting the grating needs to be provided separately.

[0075] It should be noted that the present embodiment does not limit the specific structure of the waveguide device, and those skilled in the art should configure it according to actual application requirements. For example, other devices such as a folded grating may also be provided on the waveguide plate, which will not be described in detail here.

[0076] In another optional embodiment, the waveguide device includes at least two sub-waveguide devices of different colors, each sub-waveguide device includes a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate; the transmittance regulation layer includes a plurality of transmittance regulation sublayers corresponding one-to-one to the sub-waveguide devices, each transmittance regulation sublayer includes a plurality of compensation parts corresponding one-to-one to each display area, each compensation part is used to compensate for the output brightness of the display area of ​​the corresponding sub-waveguide device, and the thickness of at least two compensation parts of each transmittance regulation sublayer is different.

[0077] In this embodiment, by independently compensating the brightness of the augmented reality display device including sub-waveguide devices of different colors, a transmittance regulating sublayer is set for each sub-waveguide device, so as to compensate the brightness of the light emitted by each sub-waveguide device. Each transmittance regulating sublayer is set corresponding to the sub-waveguide device, and the orthographic projection of the transmittance regulating sublayer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate. The transmittance regulating layer and waveguide device of this embodiment are similar to those of the previous embodiment, and will not be repeated here.

[0078] Specifically, Figure 5 As shown, the augmented reality display device further includes a cover plate 40 disposed on a side of the waveguide device 30 close to the collimating device 20. In a direction from near to far from the cover plate 40, the waveguide device 30 includes a first sub-waveguide device 310, a second sub-waveguide device 320 and a third sub-waveguide device 330;

[0079] The transmittance regulating layer includes a first transmittance regulating sublayer 510 corresponding to the first sub-waveguide device 310, a second transmittance regulating sublayer 520 corresponding to the second sub-waveguide device 320, and a third transmittance regulating sublayer 530 corresponding to the third sub-waveguide device 330;

[0080] The first transmittance regulating sublayer 510 is disposed on a side of the cover plate 40 close to the first sub-waveguide device 310, and the orthographic projection of the first transmittance regulating sublayer 510 on the waveguide plate 311 of the first sub-waveguide device 310 covers the orthographic projection of the corresponding outcoupling grating 313 on the waveguide plate 311 of the first sub-waveguide device 310;

[0081] The second transmittance regulating sublayer 520 is arranged on a side of the first sub-waveguide device 310 close to the second sub-waveguide device 320, and the orthographic projection of the second transmittance regulating sublayer 520 on the waveguide plate 321 of the second sub-waveguide device 320 covers the orthographic projection of the corresponding outcoupling grating 323 on the waveguide plate 321 of the second sub-waveguide device 320;

[0082] The third transmittance regulating sublayer 530 is arranged on a side of the second sub-waveguide device 320 close to the third sub-waveguide device 330, and the orthographic projection of the third transmittance regulating sublayer 530 on the waveguide plate 331 of the third sub-waveguide device 330 covers the orthographic projection of the corresponding outcoupling grating 333 on the waveguide plate 331 of the third sub-waveguide device 330.

[0083] By setting corresponding transmittance control sublayers for sub-waveguide devices with different colors, this embodiment can more accurately compensate for the brightness of light emitted by the sub-waveguide devices, effectively improve the light uniformity of the augmented reality display device, and improve the display effect of the augmented reality display device.

[0084] In another optional embodiment, the waveguide device includes at least one sub-waveguide device, the transmittance regulation layer includes transmittance regulation sublayers arranged in a one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device includes a waveguide plate, a coupling-in grating and a coupling-out grating arranged on the waveguide plate, and a planarization layer covering the coupling-out grating, the refractive index of the planarization layer is smaller than the refractive index of the coupling-out grating; the transmittance regulation sublayer is arranged on the planarization layer, and includes a plurality of compensation parts corresponding to each display area one-to-one, each compensation part is used to compensate for the output brightness of the corresponding display area, at least two compensation parts of each transmittance regulation sublayer have different thicknesses, and the orthographic projection of the transmittance regulation sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding coupling-out grating on the waveguide plate.

[0085] In this embodiment, a transmittance regulating sublayer is disposed on the waveguide device to compensate for the light emitted by the waveguide device. Specifically, the outcoupling grating is a transmission grating, and a planarization layer is formed on the outcoupling grating of the waveguide device. Compensation parts of the transmittance regulating sublayer are formed on the planarization layer, and each compensation part corresponds to a display area one by one, so that compensation parts of different thicknesses are formed for the brightness to be compensated required for each display area. The transmittance regulating layer and the waveguide device of this embodiment are similar to the aforementioned embodiments and are not described again here. At the same time, the refractive index of the planarization layer of this embodiment is less than the refractive index of the outcoupling grating. Specifically, the refractive index of the planarization layer is greater than or equal to 1.1 and less than or equal to 1.4; thereby, more light is emitted from the waveguide device, effectively improving the light utilization rate of the augmented reality display device.

[0086] Specifically, Figure 6 As shown, the augmented reality display device is a monochrome display device. The augmented reality display device calculates to determine the compensation brightness according to the monochrome brightness detected during monochrome display, and forms a planarization layer 60 covering the out-coupling grating 33 of the waveguide device 30, and forms each compensation part 51 of the transmittance regulating layer 50 on the planarization layer 60, and realizes the brightness compensation of the augmented reality display device through the compensation parts corresponding to each display area one by one. The orthographic projection area of ​​each compensation part 51 of the transmittance regulating layer 50 of this embodiment on the light guide plate 31 is greater than or equal to the orthographic projection area of ​​the out-coupling grating 33 on the light guide plate 31, that is, the orthographic projection of the out-coupling grating on the light guide plate falls into the orthographic projection of each compensation part on the light guide plate, thereby ensuring that each display area of ​​the augmented reality display device is compensated. In the manufacturing process, a low-refractive planarization layer is first deposited on the out-coupling grating of the waveguide device, and then a transmittance regulating layer is formed on the planarization layer. The specific implementation method refers to the aforementioned embodiment and will not be repeated here.

[0087] Specifically, Figure 7 As shown, the augmented reality display device further includes a cover plate 40 disposed on a side of the waveguide device close to the collimating device 20. In a direction from near to far from the cover plate 40, the waveguide device includes a first sub-waveguide device 310, a second sub-waveguide device 320 and a third sub-waveguide device 330;

[0088] The transmittance regulating layer includes a first planarization layer 610 disposed on the first sub-waveguide device 310, a first transmittance regulating sublayer 510 disposed on the first planarization layer 610, a second planarization layer 620 disposed on the second sub-waveguide device 320, a second transmittance regulating sublayer 520 disposed on the second planarization layer 620, and a third planarization layer 630 disposed on the third sub-waveguide device 330, and a third transmittance regulating sublayer 530 disposed on the third planarization layer 630;

[0089] The first transmittance regulating sublayer 510 includes a plurality of compensation parts 511, each compensation part 511 has a different thickness relative to the first planarization layer, and the orthographic projection of the first transmittance regulating sublayer 510 on the waveguide plate 311 of the first sub-waveguide device 310 covers the orthographic projection of the corresponding out-coupling grating 313 on the waveguide plate 311 of the first sub-waveguide device 310;

[0090] The second transmittance regulating sublayer 520 includes a plurality of compensation parts 521, each compensation part 521 has a different thickness relative to the second planarization layer, and the orthographic projection of the second transmittance regulating sublayer 520 on the waveguide plate 321 of the second sub-waveguide device 320 covers the orthographic projection of the corresponding outcoupling grating 323 on the waveguide plate 321 of the second sub-waveguide device 320;

[0091] The third transmittance regulating sublayer 530 includes a plurality of compensation parts 531, each compensation part 531 has a different thickness relative to the third planarization layer, and the orthographic projection of the third transmittance regulating sublayer 530 on the waveguide plate 331 of the third sub-waveguide device 330 covers the orthographic projection of the corresponding out-coupling grating 333 on the waveguide plate 331 of the third sub-waveguide device 330.

[0092] This embodiment aims at sub-waveguide devices with different colors, and respectively sets corresponding transmittance control sub-layers on the coupling gratings of the sub-waveguide devices, so as to more accurately compensate the brightness of the light emitted by the sub-waveguide devices, effectively improve the light uniformity of the augmented reality display device, and improve the display effect of the augmented reality display device.

[0093] In another optional embodiment, the waveguide device includes at least one sub-waveguide device, the transmittance control layer includes transmittance control sublayers arranged in a one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device includes a waveguide plate, and a reflective coupling-in grating and a reflective coupling-out grating arranged on a side of the waveguide plate away from the collimation device; the transmittance control sublayer is arranged on a side of the sub-waveguide device close to the collimation device, and includes a plurality of compensation parts corresponding to each display area one-to-one, each compensation part is used to compensate for the output brightness of the corresponding display area, at least two compensation parts of each transmittance control sublayer have different thicknesses, and the orthographic projection of the transmittance control sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding coupling-out grating on the waveguide plate.

[0094] In this embodiment, a reflective outcoupling grating is used, and the outcoupling grating is set on the side of the waveguide plate away from the collimating device; at the same time, a transmittance regulating layer is set on the side of the waveguide plate close to the collimating device to compensate for the light emitted by the waveguide device. Compared with the transmittance regulating layer in the previous embodiment being set on the flattening layer covering the outcoupling grating, the structure of the augmented reality display device is further simplified, the manufacturing process is simplified and the production cost is reduced. The transmittance regulating layer of this embodiment includes a plurality of compensation parts corresponding to the display areas one by one, so that compensation parts of different thicknesses are formed according to the brightness to be compensated required for each display area. The transmittance regulating layer and waveguide device of this embodiment are similar to those of the previous embodiment and will not be repeated here.

[0095] Specifically, Figure 8As shown, the augmented reality display device is a monochrome display device. The augmented reality display device calculates and determines the compensation brightness according to the monochrome brightness detected during monochrome display, and forms a reflective out-coupling grating 33 on the side of the light guide plate 31 of the waveguide device 30 away from the collimating device 20, and forms each compensation part 51 of the transmittance regulating layer 50 on the side of the light guide plate 31 close to the collimating device 20, and a cover plate 70 for protecting and encapsulating the reflective out-coupling grating 33 is provided on the side of the waveguide device 30 away from the collimating device 20, so that the brightness compensation of the augmented reality display device is realized through the compensation parts corresponding to each display area. The orthographic projection area of ​​each compensation part 51 of the transmittance regulating layer 50 of this embodiment on the light guide plate 31 is greater than or equal to the orthographic projection area of ​​the out-coupling grating 33 on the light guide plate 31, that is, the orthographic projection of the out-coupling grating on the light guide plate falls into the orthographic projection of each compensation part on the light guide plate, thereby ensuring that each display area of ​​the augmented reality display device is compensated. During the manufacturing process, a coupling-out grating is first formed on the side of the waveguide device away from the collimation device, and then a transmittance control layer is formed on the side of the waveguide device close to the collimation device. The specific manufacturing method of the transmittance control layer refers to the above embodiment and will not be repeated here.

[0096] It is worth noting that the present embodiment is also applicable to a color display device, the waveguide device includes a plurality of sub-waveguide devices, the transmittance regulating layer includes transmittance regulating sublayers arranged in one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device includes a reflective outcoupling grating arranged on the side of the waveguide plate away from the collimation device, and a transmittance regulating sublayer arranged on the side of the waveguide plate close to the collimation device, the transmittance regulating sublayer includes a plurality of compensation parts corresponding to each display area one-to-one, each compensation part is used to compensate for the output brightness of the corresponding display area, at least two compensation parts of each transmittance regulating sublayer have different thicknesses, and each transmittance regulating sublayer compensates for the output light of the corresponding sub-waveguide device, thereby improving the uniformity of light output of the augmented reality display device.

[0097] In another optional embodiment, the transmittance regulating layer is an electric control panel arranged between the collimating device and the waveguide device, which compensates the output brightness of each display area of ​​the waveguide device in response to a loaded voltage; the orthographic projection of the electric control panel on the waveguide device covers the orthographic projection of each display area on the waveguide device.

[0098] In this embodiment, the brightness of light emitted by the waveguide device is compensated by an electric control panel arranged between the collimating device and the waveguide device. Specifically, the electric control panel forms different brightness compensations according to the voltage loaded in the area corresponding to each display area, thereby improving the uniformity of light emitted by the augmented reality display device.

[0099] Specifically, Fig. 9As shown, the augmented reality display device is a monochrome display device, and the augmented reality display device calculates to determine the compensation brightness according to the monochrome brightness detected during monochrome display, and realizes brightness compensation of the output light of the waveguide device 30 by setting an electrically controlled transmittance regulating layer 50 between the waveguide device 30 and the collimating device 20. Specifically, the transmittance regulating layer 50 is a liquid crystal panel, including a first substrate, and a driving circuit layer, a first electrode, a liquid crystal layer, a second electrode, and a second substrate arranged on the first substrate. In response to the voltage loaded by the first electrode and the second electrode, the liquid crystal layer is driven by the driving circuit layer to compensate the output brightness of each display area of ​​the waveguide device. The augmented reality display device also includes a linear polarizer 80 arranged on the side of the liquid crystal panel close to the collimating device.

[0100] In this embodiment, the specific optical path is as follows: the linearly polarized light of the display image output by the micro display device 10 is collimated by the collimating device to convert the light of each viewing angle therein into parallel light, and the light propagation direction is changed by the coupling-in grating 32 on the waveguide device 30 to enter the optical waveguide plate 31, so that the parallel light of each viewing angle is totally reflected in the optical waveguide plate 31, propagates along the optical waveguide plate 31 to reach the coupling-out grating 33, and the coupling-out grating 33 changes the propagation direction of the light, so that the light is no longer totally reflected and transmitted in the optical waveguide plate 33, and the light is emitted from the optical waveguide plate 33, expands along the propagation direction, enters the liquid crystal panel to compensate for the brightness, and then is emitted through the linear polarizer and enters the eyes of the observer.

[0101] In this embodiment, the outcoupling grating of the waveguide device 30 can be a transmission grating or a reflection grating. Those skilled in the art should understand that when the outcoupling grating is a reflection grating, a cover plate for protecting the package should be provided on the side of the light guide plate away from the collimation device.

[0102] It is worth noting that this embodiment is also applicable to a color display device, the waveguide device includes a plurality of sub-waveguide devices, each sub-waveguide device includes a waveguide plate, and a coupling-in grating and a coupling-out grating arranged on the waveguide plate, a liquid crystal panel is arranged between the sub-waveguide device closest to the collimating device and the collimating device, and the light emitted from each sub-waveguide device is brightness compensated by the liquid crystal panel, thereby improving the uniformity of light emitted by the augmented reality display device.

[0103] In order to further simplify the structure of the augmented reality display device, in an optional embodiment, as Fig.10As shown, the augmented reality display device includes a first cover plate 40 arranged on the side of the liquid crystal panel close to the collimating device 20, and a second cover plate 30 arranged on the side of the waveguide device 30 away from the collimating device 20, the coupling grating 32 of the sub-waveguide device is a reflective coupling grating, and the coupling grating 33 is a reflective coupling grating; the first cover plate 40 is multiplexed as the second substrate of the liquid crystal panel; the waveguide plate 31 of the sub-waveguide device closest to the collimating lens among the at least one sub-waveguide device is multiplexed as the first substrate of the liquid crystal panel.

[0104] In this embodiment, if Fig.10 As shown, by adopting a reflective coupling-in grating and a coupling-out grating, the first cover plate 40 of the augmented reality display device is reused as the second substrate of the liquid crystal panel, and the waveguide plate 31 of the waveguide device 30 is reused as the first substrate of the liquid crystal panel, so as to effectively reduce the thickness of the augmented reality display device, simplify the manufacturing process and reduce the manufacturing cost. Specifically, the liquid crystal panel is a whole layer panel, including a driving circuit layer 52, a first electrode 53, a first light orientation layer 54, a liquid crystal layer 55, a second light orientation layer 56, a second electrode 57, a first cover plate 40 as a second substrate, and a linear polarizer 80 disposed on the side of the liquid crystal panel close to the collimating device. In response to the voltage loaded by the first electrode 53 and the second electrode 55, the liquid crystal panel drives the liquid crystal layer 55 through the driving circuit layer 52 to compensate the output brightness of each display area of ​​the waveguide device 30.

[0105] It is worth noting that this embodiment is also applicable to a color display device, the waveguide device includes a plurality of sub-waveguide devices, each sub-waveguide device includes a waveguide plate, and a coupling-in grating and a coupling-out grating arranged on the waveguide plate, a liquid crystal panel is arranged between the sub-waveguide device closest to the collimating device and the collimating device, and a first cover plate close to the collimating device is used as the second substrate of the liquid crystal panel, and a light guide plate of the sub-waveguide device close to the collimating device is used as the first substrate of the liquid crystal panel, and the liquid crystal panel is used to perform brightness compensation on light emitted from each sub-waveguide device, thereby improving the uniformity of light emitted by the augmented reality display device.

[0106] In an optional embodiment, the transmittance regulating layer is an electrochromic panel, such as Fig.11 As shown, it includes a third electrode 502 , an electrochromic layer 501 and a fourth electrode 503 . In response to the voltages applied to the third electrode 502 and the fourth electrode 503 , the electrochromic layer 501 is adjusted to compensate for the output brightness of each display area of ​​the waveguide device 30 .

[0107] In this embodiment, the brightness of light emitted by the waveguide device is compensated by an electrochromic panel arranged between the collimating device and the waveguide device. Specifically, the electrochromic panel presents a first state or a second state in response to the voltage loaded on the third electrode 502 and the fourth electrode 503 on the electrochromic layer 501, thereby forming different brightness compensations according to the voltage loaded on the area corresponding to each display area, thereby improving the uniformity of light output of the augmented reality display device.

[0108] Based on the transmittance control layer including the electronic control panel, in an optional embodiment, the augmented reality display device also includes a detection device for detecting the actual light output brightness of the waveguide device in real time; the transmittance control layer compensates each display area of ​​the waveguide device according to the actual light output brightness.

[0109] In this embodiment, according to the characteristic that the transmittance of the area on the electric control panel corresponding to each display area can be adjusted in real time by controlling the voltage loaded on the electric control panel, a detection device is provided in the augmented reality display device. For example, a detection device is provided on the light emitting side of the augmented reality display device, and the voltage loaded on the electric control panel is further adjusted according to the light emitting brightness of the augmented reality display device detected by the detection device in actual applications, thereby realizing real-time adjustment of the light emitting uniformity of the augmented reality display device.

[0110] Based on the above embodiments, the present application also provides a method for manufacturing the above augmented reality display device, such as Fig.12 As shown, it includes: forming a waveguide device, receiving collimated light formed by a collimating device for collimating a display image displayed by a micro-display device, and emitting it after changing the propagation direction of the light; forming a transmittance regulating layer, compensating the output brightness of each display area of ​​the augmented reality device, so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

[0111] In this embodiment, a transmittance control structure is provided in the augmented reality display device, and the transmittance control structure is used to perform brightness compensation for each display area respectively, thereby improving the brightness uniformity of each display area of ​​the augmented reality display device and improving the display effect of the augmented reality device, thereby compensating for the problems existing in the prior art and having practical application value.

[0112] In an optional embodiment, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on a waveguide plate; after the waveguide device is formed, the manufacturing method further includes: forming a cover plate on a side of the waveguide device close to the collimation device; the forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on a side of the cover plate close to the waveguide device, and patterning the transmittance regulating material layer to form a transmittance regulating layer, the transmittance regulating layer including a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate, and the thickness of at least two compensation parts of the transmittance regulating layer are different.

[0113] In this embodiment, the augmented reality display device realizes brightness compensation through each compensation part of the transmittance regulating layer arranged on the side of the cover plate facing the waveguide device, and the orthographic projection area of ​​each compensation part of the transmittance regulating layer on the light guide plate is greater than or equal to the orthographic projection area of ​​the out-coupling grating on the light guide plate, that is, the orthographic projection of the out-coupling grating on the light guide plate falls into the orthographic projection of each compensation part on the light guide plate, thereby ensuring that each display area of ​​the augmented reality display device is compensated. The specific implementation of this embodiment refers to the above embodiment and will not be repeated here.

[0114] In an optional embodiment, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on a waveguide plate, forming a planarization layer covering the out-coupling grating, the refractive index of the planarization layer being less than the refractive index of the out-coupling grating; the forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on the planarization layer, and patterning the transmittance regulating material layer to form a transmittance regulating layer; the transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

[0115] In this embodiment, a transmittance regulating sublayer is disposed on the waveguide device to compensate for the light emitted by the waveguide device. Specifically, the outcoupling grating is a transmission type grating, a planarization layer is formed on the outcoupling grating of the waveguide device, and various compensation parts of the transmittance regulating sublayer are formed on the planarization layer. Each compensation part corresponds to a display area one by one, so that compensation parts of different thicknesses are formed according to the brightness to be compensated required for each display area. The specific implementation of this embodiment refers to the above-mentioned embodiment, which will not be repeated here.

[0116] In an optional embodiment, the forming of the waveguide device further includes: forming an in-coupling grating and an out-coupling grating on a side of the waveguide plate away from the collimating lens; the forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on a side of the waveguide plate close to the collimating lens, and patterning the transmittance regulating material layer to form a transmittance regulating layer; the transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

[0117] In this embodiment, a reflective outcoupling grating is used, and the outcoupling grating is set on the side of the waveguide plate away from the collimating device; at the same time, a transmittance regulating layer is set on the side of the waveguide plate close to the collimating device to compensate for the light emitted by the waveguide device. Compared with the transmittance regulating layer in the previous embodiment being set on the flattening layer covering the outcoupling grating, the structure of the augmented reality display device is further simplified, the manufacturing process is simplified and the production cost is reduced. The transmittance regulating layer of this embodiment includes a plurality of compensation parts corresponding to the display areas one by one, so as to form compensation parts of different thicknesses according to the brightness to be compensated required for each display area. The specific implementation of this embodiment refers to the previous embodiment and will not be repeated here.

[0118] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. An augmented reality display device, characterized in that: include: A micro display device for displaying images; A collimating device, used for collimating the light of the display image to form collimated light; A waveguide device, used for receiving the collimated light and changing the propagation direction of the light before emitting it; as well as The transmittance regulating layer is used to compensate the output brightness of each display area of ​​the augmented reality display device so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

2. The augmented reality display device according to claim 1, characterized in that: The augmented reality display device further comprises a cover plate arranged on a side of the waveguide device close to the collimating device, wherein the waveguide device comprises a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate; The transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one; The transmittance regulating layer is arranged on a side of the cover plate close to the waveguide device, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate, and the thickness of at least two compensation parts of the transmittance regulating layer are different.

3. The augmented reality display device according to claim 1, characterized in that: The waveguide device comprises at least two sub-waveguide devices of different colors, each sub-waveguide device comprises a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate; The transmittance regulating layer includes a plurality of transmittance regulating sublayers corresponding one-to-one to the sub-waveguide devices, each transmittance regulating sublayer includes a plurality of compensation parts corresponding one-to-one to each display area, each compensation part is used to compensate for the output brightness of the display area of ​​the corresponding sub-waveguide device, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

4. The augmented reality display device according to claim 3, characterized in that: The augmented reality display device further comprises a cover plate disposed on a side of the waveguide device close to the collimating device, and in a direction from near to far from the cover plate, the waveguide device comprises a first sub-waveguide device, a second sub-waveguide device and a third sub-waveguide device; The transmittance regulating layer includes a first transmittance regulating sublayer corresponding to the first sub-waveguide device, a second transmittance regulating sublayer corresponding to the second sub-waveguide device, and a third transmittance regulating sublayer corresponding to the third sub-waveguide device; The first transmittance regulating sublayer is arranged on a side of the cover plate close to the first sub-waveguide device, and an orthographic projection of the first transmittance regulating sublayer on the waveguide plate of the first sub-waveguide device covers an orthographic projection of a corresponding outcoupling grating on the waveguide plate of the first sub-waveguide device; The second transmittance regulating sublayer is arranged on a side of the first sub-waveguide device close to the second sub-waveguide device, and the orthographic projection of the second transmittance regulating sublayer on the waveguide plate of the second sub-waveguide device covers the orthographic projection of the corresponding outcoupling grating on the waveguide plate of the second sub-waveguide device; The third transmittance regulating sublayer is arranged on a side of the second sub-waveguide device close to the third sub-waveguide device, and the orthographic projection of the third transmittance regulating sublayer on the waveguide plate of the third sub-waveguide device covers the orthographic projection of the corresponding outcoupling grating on the waveguide plate of the third sub-waveguide device.

5. The augmented reality display device according to claim 1, characterized in that: The waveguide device includes at least one sub-waveguide device, the transmittance regulating layer includes transmittance regulating sub-layers arranged in one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device includes a waveguide plate, an in-coupling grating and an out-coupling grating arranged on the waveguide plate, and a planarization layer covering the out-coupling grating, and the refractive index of the planarization layer is less than the refractive index of the out-coupling grating; The transmittance regulating sublayer is arranged on the planarization layer, and includes a plurality of compensation parts corresponding to each display area one by one, each compensation part is used to compensate for the output brightness of the corresponding display area, the thickness of at least two compensation parts of each transmittance regulating sublayer is different, and the orthographic projection of the transmittance regulating sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding out-coupling grating on the waveguide plate.

6. The augmented reality display device according to claim 1, characterized in that: The waveguide device comprises at least one sub-waveguide device, the transmittance regulating layer comprises transmittance regulating sub-layers arranged in one-to-one correspondence with the sub-waveguide devices, each sub-waveguide device comprises a waveguide plate, and a reflective coupling-in grating and a reflective coupling-out grating arranged on a side of the waveguide plate away from the collimating device; The transmittance regulating sublayer is arranged on a side of the sub-waveguide device close to the collimating device, and includes a plurality of compensation parts corresponding to each display area one by one, each compensation part is used to compensate for the output brightness of the corresponding display area, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different. The orthographic projection of the transmittance regulating sublayer on the corresponding waveguide plate covers the orthographic projection of the corresponding out-coupling grating on the waveguide plate.

7. The augmented reality display device according to any one of claims 2 to 6, characterized in that: The transmittance regulating layer is a polymer, an inorganic substance or a metal oxide, and the thickness of the transmittance regulating layer is greater than or equal to 100 nanometers and less than or equal to 3 micrometers.

8. The augmented reality display device according to claim 1, characterized in that: The transmittance regulating layer is an electric control panel disposed between the collimating device and the waveguide device, and compensates the output brightness of each display area of ​​the waveguide device in response to the loaded voltage; The orthographic projection of the electric control panel on the waveguide device covers the orthographic projection of each display area on the waveguide device.

9. The augmented reality display device according to claim 8, characterized in that: The transmittance regulating layer is a liquid crystal panel, comprising a first substrate, and a driving circuit layer, a first electrode, a liquid crystal layer, a second electrode, and a second substrate arranged on the first substrate, and the liquid crystal layer is driven by the driving circuit layer in response to the voltage applied to the first electrode and the second electrode to compensate the output brightness of each display area of ​​the waveguide device; The waveguide device includes at least one sub-waveguide device, and each sub-waveguide device includes a waveguide plate, and an in-coupling grating and an out-coupling grating arranged on the waveguide plate.

10. The augmented reality display device according to claim 9, characterized in that: The augmented reality display device comprises a first cover plate arranged on a side of the liquid crystal panel close to the collimating device, and a second cover plate arranged on a side of the waveguide device away from the collimating device, wherein the coupling-in grating of the sub-waveguide device is a reflective coupling-in grating, and the coupling-out grating is a reflective coupling-out grating; The first cover plate is reused as the second substrate of the liquid crystal panel; A waveguide plate of a sub-waveguide device closest to the collimating lens among the at least one sub-waveguide device is reused as a first substrate of the liquid crystal panel.

11. The augmented reality display device according to claim 8, characterized in that: The transmittance regulating layer is an electrochromic panel, including a third electrode, an electrochromic layer and a fourth electrode. In response to the voltage loaded on the third electrode and the fourth electrode, the electrochromic layer is adjusted to compensate for the output brightness of each display area of ​​the waveguide device.

12. The augmented reality display device according to claim 8, characterized in that the augmented reality display device further comprises a detection device for detecting the actual light output brightness of the waveguide device in real time; The transmittance regulating layer compensates each display area of ​​the waveguide device according to the actual light output brightness.

13. A method for manufacturing an augmented reality display device as claimed in any one of claims 1 to 12, characterized in that: include: A waveguide device is formed to receive collimated light formed by the collimation device performing a collimation operation on a display image displayed by the micro-display device and to emit the collimated light after changing the propagation direction of the light; A transmittance regulating layer is formed to compensate the output brightness of each display area of ​​the augmented reality device so that the uniformity of the light output brightness of each display area meets a preset brightness uniformity threshold, and the display area includes at least one pixel.

14. The manufacturing method according to claim 13, characterized in that: The forming of the waveguide device further comprises: forming an in-coupling grating and an out-coupling grating on the waveguide plate; After forming the waveguide device, the manufacturing method further comprises: forming a cover plate on a side of the waveguide device close to the collimating device; The forming of the transmittance regulating layer further includes: depositing a transmittance regulating material layer on a side of the cover plate close to the waveguide device, patterning the transmittance regulating material layer to form a transmittance regulating layer, the transmittance regulating layer including a plurality of compensation parts corresponding one-to-one to each display area, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the out-coupling grating on the waveguide plate, and the thickness of at least two compensation parts of the transmittance regulating layer are different.

15. The manufacturing method according to claim 13, characterized in that: The forming of the waveguide device further comprises: forming an in-coupling grating and an out-coupling grating on the waveguide plate, forming a planarization layer covering the out-coupling grating, wherein the refractive index of the planarization layer is less than the refractive index of the out-coupling grating; the forming of the transmittance regulating layer further comprises: depositing a transmittance regulating material layer on the planarization layer, and patterning the transmittance regulating material layer to form the transmittance regulating layer; or The forming of the waveguide device further comprises: forming an in-coupling grating and an out-coupling grating on a side of the waveguide plate away from the collimating lens; the forming of the transmittance regulating layer further comprises: depositing a transmittance regulating material layer on a side of the waveguide plate close to the collimating lens, and patterning the transmittance regulating material layer to form a transmittance regulating layer; The transmittance regulating layer includes a plurality of compensation parts corresponding to each display area one by one, the orthographic projection of the transmittance regulating layer on the waveguide plate covers the orthographic projection of the outcoupling grating on the waveguide plate, and the thickness of at least two compensation parts of each transmittance regulating sublayer is different.

Images