CN116413940A - Image depth modulation module, display module and near-to-eye display equipment - Google Patents
Image depth modulation module, display module and near-to-eye display equipment Download PDFInfo
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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Abstract
The invention discloses an image depth modulation module, which comprises a plurality of layers of electric control dimming plates arranged in a stacking way, wherein each layer of electric control dimming plate consists of a plurality of electric control dimming units, each electric control dimming unit is provided with an independent switch, and any electric control dimming unit on different electric control dimming plates can be independently regulated and controlled to be in a transmission state or a scattering state; when the image depth modulation module works, the electric control dimming units in the electric control dimming plates of all layers are cooperatively regulated and controlled to be in a transmission state or a scattering state. Meanwhile, the invention also discloses a display module applying the image depth modulation module and near-to-eye display equipment, wherein the depth of field is loaded to the image through a physical structure, so that the pixel-level or quasi-pixel-level depth of field adjustment is realized, the visual convergence conflict effect can be solved, the image observed by human eyes is more in line with the focusing habit of human eyes, and the depth arrangement of the display image is more approximate to the depth rule of a real light field.
Description
Technical Field
The invention relates to the field of image display, in particular to an image depth modulation module, a display module applying the image depth modulation module and near-to-eye display equipment.
Background
Most of the existing HMD (head mounted display) virtual reality/augmented reality display systems are designed according to a fixed imaging distance, so that the distance between a virtual image displayed in front of the human eye and the human eye after an image source passes through the optical display system is fixed, and this display without image depth of field can cause a Vergence adjustment conflict (vergent-Accommodation Conflict, VAC) to cause "motion sickness", so that the user experience is very poor. And if such HMD devices are used for augmented reality applications, the virtual images seen by these display systems are floating in the air, separated from the actual environment, and cannot achieve a true augmented display effect, since the distance of the virtual images from the human eye is constant and the environment is constantly changing.
Disclosure of Invention
The invention aims to provide an image depth modulation module, a display module applying the image depth modulation module and near-eye display equipment, so that image display with depth of field is realized, and meanwhile, the problem of visual convergence conflict of the near-eye display equipment is solved.
In order to achieve the above-mentioned purpose, the invention provides an image depth modulation module, including a plurality of layers of electric control dimming plates stacked, each layer of electric control dimming plates is composed of a plurality of electric control dimming units, each electric control dimming unit is provided with an independent switch, any electric control dimming unit on different electric control dimming plates can be independently regulated to be in a transmission state or a scattering state;
when the image depth modulation module works, the electric control dimming units in the electric control dimming plates of all layers are cooperatively regulated and controlled to be in a transmission state or a scattering state.
Preferably, the electrically controlled dimming unit is a polymer stabilized liquid crystal photoelectric unit or a polymer dispersed liquid crystal photoelectric unit.
Preferably, the plurality of layers of the electric control dimming plates are arranged at intervals in parallel.
Correspondingly, the invention also provides a display module, which comprises an image generation module, an image depth modulation module and an objective lens system, wherein the image depth modulation module is the image depth modulation module, and image light generated by the image generation module is emitted through the image depth modulation module and then through the objective lens system.
Preferably, each of the electrically controlled dimming units on each layer of the electrically controlled dimming board corresponds to one or more pixel points generated by the image generating module.
Preferably, the image depth modulation module comprises 12 layers of electric control dimming plates which are stacked.
Preferably, the imaging distance P of each layer of the electrically controlled dimming plate n The design is as follows:
wherein L is the pupil diameter of human eyes, epsilon represents the resolution of human eyes, n is the number of layers of the electric control dimming plates, and when n is 1, the electric control dimming plate represents the first layer nearest to the objective lens system.
Preferably, ε ranges from 1 'to 3' and L ranges from 2mm to 5mm.
Preferably, ε is 2' and L is 3.5mm.
Preferably, the scattering angle of each electronically controlled dimming unit is less than 60 ° and greater than 5 °.
Correspondingly, the invention also provides near-eye display equipment, which comprises one or two groups of near-eye display optical systems, wherein each group of near-eye display optical systems comprises one group of display modules and a light guide system, and image light generated by the image generation module is firstly transmitted through the image depth modulation module and then transmitted into the light guide system through the objective lens system, and is transmitted to human eyes through the light guide system.
Preferably, the near-eye display device further comprises a processor, wherein the processor controls the image generating module to generate image light, and simultaneously controls the image depth modulation module to control each electric control dimming unit in each layer of electric control dimming plate to adjust to a transmission state or a scattering state according to different depth of field corresponding to different areas of the image light.
The image depth modulation module is controlled to adjust each electric control dimming unit in each layer of electric control dimming plate to a transmission state or a scattering state according to different depth of field corresponding to different areas of image light, and specifically comprises the following steps:
and controlling the electric control dimming units of the corresponding areas of the electric control dimming plates corresponding to the depth of field of the image light of a certain area to be adjusted to be in a scattering state, and adjusting the electric control dimming units of the corresponding areas of the electric control dimming plates of other layers which are stacked to be in a transmission state.
Compared with the prior art, the invention has the following beneficial effects:
according to the embodiment of the invention, the depth of field is loaded to the image through the physical structure, so that the pixel-level or quasi-pixel-level depth of field adjustment is realized, the visual convergence conflict effect can be solved, the image observed by human eyes is more in line with the focusing habit of human eyes, and the depth arrangement of the display image is more approximate to the depth rule of a real light field.
Drawings
For a clearer description of embodiments of the invention or of solutions in the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being evident that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained, without inventive faculty, by a person skilled in the art from these drawings:
FIG. 1 is a schematic diagram of an image depth modulation module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of each layer of the electrically controlled dimming board in fig. 1;
FIG. 3 is a schematic diagram of a display module according to an embodiment of the invention;
FIG. 4 is a schematic diagram of another structure of a display module according to an embodiment of the invention;
FIG. 5 is a schematic view of an embodiment of the present invention for generating a landscape image by the image generating module;
FIG. 6 is a schematic diagram showing a structure of a near-eye display optical system in a near-eye display device according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a near-eye display device according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a schematic structural diagram of an embodiment of an image depth modulation module according to the present invention includes a plurality of stacked electrically controlled dimming boards 10, each layer of electrically controlled dimming boards 10 is composed of a plurality of electrically controlled dimming units 101, the schematic structural diagram of each layer of electrically controlled dimming boards 10 is shown in fig. 2, each electrically controlled dimming unit 101 has an independent switch, the switch may be a transparent or semitransparent semiconductor switch, and each electrically controlled dimming unit may be controlled to be in a transmission state or a scattering state.
An image is incident from one side of the image depth modulation module, a first part of the image passes through a first area of a layer of electric control dimming plate 10, and because each electric control dimming unit on the electric control dimming plate can be independently regulated and controlled, the electric control dimming units in the first area can be controlled to be in a scattering state at the moment, the first part of the image is scattered in the first area of the electric control dimming plate, and at the moment, the first part of the image is loaded with depth information; the second part of the image passes through a second area on the other electric control dimming plate and is scattered, and at the moment, the second part of the image is loaded with another piece of depth information; similarly, each electric control dimming plate can be responsible for one depth, and finally, a plurality of depth information can be loaded on the image. When the size of each of the electronically controlled dimming units 101 constituting the electronically controlled dimming board 10 is made small enough, depth modulation at the pixel or quasi-pixel level can be achieved.
Preferably, the electrically controlled dimming unit may be a polymer stabilized liquid crystal photo cell PSLC (polymer stabilized liquid crystal) or a reverse PSLC, or may be a polymer dispersed liquid crystal photo cell PDLC (polymer dispersed liquid crystal), which has the same physical characteristics, and is switched to a transmissive state or a scattering state by applying or not applying a voltage. Taking an electronic control dimming unit as a PSLC as an example: the electrode for controlling the PSLC can be made into a TFT-like display screen by adopting TFT (Thin Film Transistor) or ITO (indium tin oxide) and other similar technologies, except that each liquid crystal pixel point in the TFT is replaced by the PSLC with the pixel level size, so that each PSLC can be controlled by a semiconductor switch at a corresponding position and is generally controlled by adopting electric pulse; each PSLC is independently controllable by a respective semiconductor switch in a corresponding position. For example, parameters of a PSLC electrically controlled dimmer may be designed to have dimensions of 3×4.5mm, resolutions of 640×540, and thicknesses of 10um to 30um, and the size of each PSLC constituting the PSLC electrically controlled dimmer may be sufficiently small, for example, a PSLC may be square with a side length of 10um, so that two portions corresponding to different depths of an incident image may be matched with each other more smoothly.
In order to make the depth modulation of the whole image picture uniform, the multi-layer electric control dimming plates are preferably arranged at intervals in parallel, and the interval distance between the adjacent electric control dimming plates is required to be different according to different preset focusing distances, whether the electric control dimming plates are matched with other amplifying optical elements or not, and the like, and the electric control dimming plates can be designed into different intervals without limitation.
Referring to fig. 3, a schematic structural diagram of a display module according to an embodiment of the present invention is shown, where the near-eye display optical module according to the embodiment of the present invention includes an image generating module 2, an image depth modulating module 1 and an objective lens system 3, the image depth modulating module 1 is the image depth modulating module described in the foregoing embodiment, the image generating module 2 generates collimated image light, and the image depth modulating module 1 loads depth information and then outputs the collimated image light through the objective lens system 3. In the embodiment of the invention, each electric control dimming unit on each layer of electric control dimming board can be designed to correspond to one or more pixel points generated by the image generation module, and when each electric control dimming unit is designed to correspond to one pixel point generated by the image generation module, the pixel level depth modulation is realized.
In fig. 3, the image depth modulation module 1 is forward scattering, and in a specific implementation, the image generation module 2 may also be placed on the other side of the image depth modulation module 1 in the manner of fig. 4, and implemented by a backward scattering manner.
According to the embodiment of the invention, the depth of field is loaded to the image through the physical structure, so that the visual convergence conflict effect can be solved, the image observed by human eyes is more in line with the focusing habit of human eyes, and the depth arrangement of the display image is more approximate to the depth rule of the real light field. Because the human eyes are generally only sensitive to 12 layers of depths, the image depth modulation module is best formed by the 12 layers of electric control dimming plates, and 3, 4, 5 or 6, 7, 8 layers and the like can be selected for reducing the volume and the weight of the near-eye display optical module, so that the depth of field effect is achieved, and the effect can not reach the nature of 12 layers.
How the display module of the present invention achieves the depth of field is described below with reference to fig. 5, assuming that the electronically controlled dimming unit is a PSLC, as in fig. 5, a landscape image is generated for the image generating module, the landscape image being incident from one side of the image depth modulating module, the image area of the tree and the image area of the mountain having different depths. For example: the image area of the tree is responsible for a first layer of electric control dimming plates of the image depth modulation module, a plurality of PSLCs irradiated by the image area of the tree on the first layer of electric control dimming plates are controlled to be in a scattering state, the display position of the tree is positioned at the position of the first layer of electric control dimming plates, namely, the focusing position is positioned at the position of the first layer of electric control dimming plates, PSLCs of other areas on the first layer of electric control dimming plates are controlled to be in a transmission state, and PSLCs of projection areas of the PSLCs in the scattering state on the first layer of electric control dimming plates on the other layers of electric control dimming plates are also controlled to be in a transmission state; the image area of the mountain is responsible for a second layer of electric control dimming plates of the image depth modulation module, a plurality of PSLCs irradiated by the image area of the mountain on the second layer of electric control dimming plates are controlled to be in a scattering state, the display position of the mountain is positioned at the position of the second layer of electric control dimming plates, namely, the focusing position is positioned at the position of the second layer of electric control dimming plates, PSLCs of other areas on the second layer of electric control dimming plates are controlled to be in a transmission state, and PSLCs of projection areas of the PSLCs in the scattering state on the second layer of electric control dimming plates on the other layers of electric control dimming plates are also controlled to be in a transmission state; by the above, the image portions of other depths of the landscape image are displayed on a certain layer of the electrically controlled dimming board, that is, a plurality of layers of the electrically controlled dimming boards are switched to a scattering state at the same time. Because of the focusing characteristic of human eyes, when the human eyes focus on a certain layer of electric control dimming plates, other layers of electric control dimming plates can be blurred images in the human eyes, so that the effect of depth of field is achieved. As long as the size of each PSLC is small enough, the five depth images corresponding to the first to fifth depth regions are joined more smoothly with each other.
The previous paragraph teaches how to implement the depth of field by using the multi-layer electric control dimming plate, and how to design the image focusing position of each layer of electric control dimming plate based on the previous paragraph so as to better solve the vision convergence conflict and better simulate the real light field.
In the following, we simply calculate the depth of field of the human eye, the resolution of the human eye is denoted by epsilon, and the pupil diameter is L. When the focusing distance of the human eye is P, the distance P 1 And close-up P 2 The distance of (2) is:
expressed in diopters phi, the focusing, distance and near positions can be expressed as:
the corresponding depth of field diopter may be expressed as:
it can be seen that when depth of field is expressed in diopters, it is only related to the resolution epsilon of the human eye and the L of the pupil diameter, and the depth of field delta of the human eye can be calculated. The focusing range of the human eye is typically 0.25m to infinity, expressed in diopters of 0-4L. Therefore, in the process of designing the waveguide, if n layers of the electrically controlled dimming plates are needed to meet the imaging requirement, the imaging distance P of each layer of the electrically controlled dimming plates n According to the focusing formula, it can be expressed as:
wherein L is pupil diameter, epsilon represents human eye resolution, n is the number of layers of the electric control dimming plate, and when n is 1, the electric control dimming plate represents the first layer nearest to the objective lens system. The imaging distance of the first layer of electric control dimming plates is calculated to be available in n=1, the imaging distance of the second layer of electric control dimming plates is calculated to be available in n=2, and the imaging distances of other layers of electric control dimming plates can be calculated in sequence. The imaging distance of each layer of electric control dimming plate obtained according to the formula can enable human eyes to see clear images at any focal distance in space, and finally full-space imaging is met. In this section, the imaging distance can be set in two ways, but not limited to: firstly, the imaging distances of different electric control dimming plates can be realized through focusing modes such as lenses and the like; second, the imaging distance of each electronically controlled dimmer plate is located at its own position by setting the position of the electronically controlled dimmer plate. Considering that the second scheme is too large in size and low in practicality when actually implemented, in general, we can choose to adopt focusing modes such as lenses to realize imaging distances of different electric control dimming plates, such as the lens 3 in fig. 3, and the lens simultaneously realizes distance and image amplification, so that the physical distance between the electric control dimming plates can be compressed in proportion, and the miniaturization of the module is realized.
The resolution epsilon of the human eye is typically 1 'to 3' and the pupil diameter L is 2mm-5mm. In the following we choose the resolution epsilon of 2' and the pupil L of 3.5mm as examples, according to the following formula:
the resolution epsilon expressed by the angle is required to be converted into radian for calculation, the depth of field delta is 0.3323L, the focusing range of human eyes is 0.25m to infinity, and the resolution epsilon expressed by the angle is 0-4L. Therefore, in the process of designing the image depth modulation module, if 12 layers of electric control dimming plates are needed to meet the requirement of imaging, the focusing distance corresponding to each electric control dimming plate is as follows: 0.2608m, 0.2856m, 0.3155m, 0.3525m, 0.3992m, 0.4603m, 0.5434m, 0.6632m, 0.8507m, 1.1860m, 1.9573m, 5.5991m. Because of pupil diameter and angular resolution of human eyes, each plane has a depth of field range for human eyes, and 12 planes can connect the depth of field ranges, so that human eyes can be clearly imaged at any position in space. The full-space imaging can be satisfied, so that the human eyes can have focal planes which can be clearly imaged when focusing at any position.
In the embodiment of the present invention, in order to prevent the scattering angle from being excessively large, the scattered light of a certain dimming plate affects the dimming plates arranged at the rear, and it is preferable that the scattering angle of each of the electronically controlled dimming units is less than 60 ° and greater than 5 °. For example, a certain position of a certain image is scattered by the third electric control dimming unit of the second dimming plate, light scattered by the third electric control dimming unit of the second dimming plate enters the third dimming plate and is scattered by the electric control dimming unit on the third dimming plate outside the projection surface of the third electric control dimming unit on the second dimming plate, so that the position of the image is scattered by a plurality of dimming plates to cause interference. The smaller the scattering angle is, the smaller the interference degree is, but if the scattering angle is smaller than 5 degrees, the difference of the imaging depth of field of the two dimming plates is too small, and the depth of field of different dimming plates is difficult to distinguish by human eyes, so that the depth modulation effect is not good enough.
The display module in the above embodiment may be applied to a near-eye display device, such as a virtual reality VR device or an augmented reality AR device, and may also be applied to a rear projection display device, such as a television, an advertisement screen, and the like. Taking a near-eye display device as an example, the near-eye display device includes one or two sets of near-eye display optical systems, each set of near-eye display optical systems includes one set of display modules and a light guiding system in an embodiment of the present invention, as shown in fig. 6, which is a schematic structural diagram of the near-eye display optical system, image light generated by an image generating module in the display module 400 is emitted through an image depth modulation module and then through an objective lens system, coupled into the light guiding system 5 through the coupling system 4, and emitted to human eyes through the light guiding system 5. The schematic structure of the near-eye display device can be seen in fig. 7, the display module 400 may be designed on both sides of the frame, or on the temple, and the waveguide system 5 may be designed as a lens.
In specific implementation, the near-eye display device further includes a processor, the processor controls the image generating module to generate image light, and controls the image depth modulation module to adjust each electric control dimming unit in each layer of electric control dimming plate to a transmission state or a scattering state according to different depth of field corresponding to different areas of the image light, specifically:
and controlling the electric control dimming units of the corresponding areas of the electric control dimming plates corresponding to the depth of field of the image light of a certain area to be adjusted to be in a scattering state, and adjusting the electric control dimming units of the corresponding areas of the electric control dimming plates of other layers which are stacked to be in a transmission state. Also, as illustrated in fig. 4, as the image in fig. 4, the electrically controlled dimming board corresponding to the depth of field corresponding to the tree is assumed to be the first layer electrically controlled dimming board, and the electrically controlled dimming board corresponding to the depth of field corresponding to the mountain is assumed to be the second layer electrically controlled dimming board, so that the plurality of electrically controlled dimming units irradiated by the image area of the tree on the first layer electrically controlled dimming board are controlled to be in a scattering state, and the electrically controlled dimming units of the electrically controlled dimming units in the scattering state on the first layer electrically controlled dimming board in the projection areas on the other layers electrically controlled dimming boards are also controlled to be in a transmission state; the plurality of electric control dimming units irradiated by the mountain image area on the second layer of electric control dimming plates are controlled to be in a scattering state, and the electric control dimming units of the projection areas of the scattering state electric control dimming units on the second layer of electric control dimming plates on other layers of electric control dimming plates are also controlled to be in a transmission state.
The invention adopts a multilayer electric control dimming plate to realize the depth of field effect by a physical method, so that the image seen by human eyes more accords with the law of a real light field; in addition, the reasonable design of the imaging distance of the multi-layer electric control dimming plate can be more in line with the law of the light field in real space, so that the focusing of human eyes is more natural and is closer to the focusing mode in the light field in real space, and the human eyes are more comfortable. Finally, the uncomfortable feeling of dizziness and eye distension in VR and AR display in the prior art is effectively solved through the two points.
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
The above technical solution of the present application can be summarized as follows:
a1, an image depth modulation module is characterized by comprising a plurality of layers of stacked electric control dimming plates, wherein each layer of electric control dimming plates consists of a plurality of electric control dimming units, each electric control dimming unit is provided with an independent switch, and any electric control dimming unit on different electric control dimming plates can be independently regulated to be in a transmission state or a scattering state;
when the image depth modulation module works, the electric control dimming units in the electric control dimming plates of all layers are cooperatively regulated and controlled to be in a transmission state or a scattering state.
A2, the image depth modulation module of A1, wherein the electrically controlled dimming unit is a polymer stabilized liquid crystal photoelectric unit or a polymer dispersed liquid crystal photoelectric unit.
A3, the image depth modulation module according to A2 is characterized in that a plurality of layers of electric control dimming plates are arranged in parallel at intervals.
A4, a display module, which is characterized by comprising an image generation module, the image depth modulation module and an objective lens system, wherein image light generated by the image generation module is emitted through the image depth modulation module and then through the objective lens system.
A5, the display module of A4, wherein each electrically controlled dimming unit on each layer of electrically controlled dimming board corresponds to one or more pixel points generated by the image generating module.
The display module of A6, A5, wherein the image depth modulation module comprises 12 layers of stacked electrically controlled dimming plates.
A7, the display module according to any one of A4 to A6, wherein the imaging distance P of each layer of the electrically controlled dimming plate n The following is followedAnd (3) designing a formula:
wherein L is the pupil diameter of human eyes, epsilon represents the resolution of human eyes, n is the number of layers of the electric control dimming plates, and when n is 1, the electric control dimming plate represents the first layer nearest to the objective lens system.
A8, A7, wherein ε is in the range of 1 'to 3' and L is in the range of 2mm to 5mm.
A9, the display module of A7, wherein ε is 2', L is 3.5mm.
A10, the display module according to any of A4 to A6, wherein a scattering angle of each of the electronically controlled dimming units is less than 60 ° and greater than 5 °.
A11, a near-eye display device, including one or two sets of near-eye display optical systems, wherein each set of near-eye display optical system includes a set of display module and light guide system according to any one of A4 to A10, the image light generated by the image generation module is first incident to the light guide system through the image depth modulation module and then incident to the light guide system through the objective lens system, and is emitted to human eyes through the light guide system.
The near-eye display device of a12, a11, wherein the near-eye display device further comprises a processor, the processor controls the image generating module to generate image light, and controls the image depth modulation module to control each electric control dimming unit in each layer of electric control dimming plate to adjust to a transmission state or a scattering state according to different depths of field corresponding to different areas of the image light.
A13, the near-to-eye display device of A12, wherein the control image depth modulation module controls each electric control dimming unit in each layer of electric control dimming plate to adjust to a transmission state or a scattering state according to different depths of field corresponding to different areas of image light, specifically:
and controlling the electric control dimming units of the corresponding areas of the electric control dimming plates corresponding to the depth of field of the image light of a certain area to be adjusted to be in a scattering state, and adjusting the electric control dimming units of the corresponding areas of the electric control dimming plates of other layers which are stacked to be in a transmission state.
Claims (10)
1. The image depth modulation module is characterized by comprising a plurality of layers of electric control dimming plates which are stacked, wherein each layer of electric control dimming plate consists of a plurality of electric control dimming units, each electric control dimming unit is provided with an independent switch, and any electric control dimming unit on different electric control dimming plates can be independently regulated to be in a transmission state or a scattering state;
when the image depth modulation module works, the electric control dimming units in the electric control dimming plates of all layers are cooperatively regulated and controlled to be in a transmission state or a scattering state.
2. The image depth modulation module of claim 1, wherein the electronically controlled dimming unit is a polymer stabilized liquid crystal photovoltaic unit or a polymer dispersed liquid crystal photovoltaic unit.
3. The image depth modulation module of claim 2, wherein the plurality of electrically controlled dimming plates are arranged in parallel and spaced apart relation.
4. A display module, comprising an image generating module, an image depth modulation module according to any one of claims 1 to 3, and an objective lens system, wherein the image light generated by the image generating module is emitted through the image depth modulation module and then through the objective lens system.
5. The display module of claim 4, wherein each electrically controlled dimming unit on each electrically controlled dimming board corresponds to one or more pixels generated by the image generating module.
6. The display module of claim 5, wherein the image depth modulation module comprises 12 layers of electronically controlled dimming plates stacked.
7. The display module assembly of any one of claims 4 to 6, whereinThe imaging distance P of each layer of the electric control light modulation plate n The design is as follows:
wherein L is the pupil diameter of human eyes, epsilon represents the resolution of human eyes, n is the number of layers of the electric control dimming plates, and when n is 1, the electric control dimming plate represents the first layer nearest to the objective lens system.
8. A near-eye display device comprising one or two sets of near-eye display optical systems, wherein each set of near-eye display optical systems comprises a set of display modules according to any one of claims 4 to 7 and a light guide system, and image light generated by the image generation module is firstly incident to the light guide system through the image depth modulation module and then is incident to the light guide system through the objective lens system, and is emitted to human eyes through the light guide system.
9. The near-eye display device of claim 8, further comprising a processor controlling the image generation module to generate image light and controlling the image depth modulation module to adjust each of the electronically controlled dimming units in each layer of electronically controlled dimming board to a transmissive state or a scattering state according to different depths of field corresponding to different regions of the image light.
10. The near-eye display device of claim 9 wherein the control image depth modulation module controls each electrically controlled dimming unit in each layer of electrically controlled dimming board to adjust to a transmission state or a scattering state according to different depths of field corresponding to different areas of the image light, specifically:
and controlling the electric control dimming units of the corresponding areas of the electric control dimming plates corresponding to the depth of field of the image light of a certain area to be adjusted to be in a scattering state, and adjusting the electric control dimming units of the corresponding areas of the electric control dimming plates of other layers which are stacked to be in a transmission state.
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