TWI594019B - A system and method for adjusting the depth of field of multi-depth display - Google Patents

Description

System and method for adjusting depth of field of multi-depth display

The present invention relates to a system and method for adjusting the depth of field of a multi-depth display, and more particularly to a system and method for achieving the effect of multiple depth of field images through multiple light sources or multiple light source angles.

At present, smart glasses will open a new mobile computing device usage model. After Google Glass started a topic in the industry, the development trend of smart glasses is continuing to burn. At present, most manufacturers plan to introduce micro-projection display technology to realize a see-through display, and with a simple operation software interface, the product can provide multi-purpose use. To attract consumers to purchase.

At present, the mainstream micro-projection display technology can be divided into digital light source processing (DLP), micro-electromechanical system (MEMS) laser, liquid crystal on-silicon (LCOS) micro-projector, etc., wherein LCoS micro-projection display technology originally It is used in micro-projection applications, but it has the advantages of power saving, small size, and virtual screen size. It is suitable for smart glasses products (such as LCoS micro-projection display technology used by Google Glass smart glasses), so that users can get as much as they can. Visual enjoyment of large size screens.

LCoS is a CMOS chip that uses CMOS backplane semiconductor process technology. Its main feature is that the substrate is made of single crystal germanium, so it has good electron mobility. In addition, LCoS not only has high resolution, high quality and low cost. Advantages, and inherit the advantages of LCD technology, And to overcome the shortcomings of LCD, LCoS has many advantages that LCD does not have; however, the current three-dimensional image usually uses two LCOS optical engine dual-lens two-way synchronous output signals to achieve the purpose of overlapping images. There are multiple layers of glass to achieve the depth of field effect, but in order to improve the depth of field effect, the more layers of glass must be used, so the mirror itself will become thicker and thicker, so it is known that the effect of using the multi-layer glass to achieve depth of field is The shortcoming exists.

Therefore, if at least one set of adjustable micro-projectors and more than one set of fixed micro-projectors can be used, and the distance between the adjustable micro-projector and a fixed micro-projector can be controlled and/or changed The angle of the light path can form a virtual image to achieve the purpose of displaying multiple depth of field images, which will overcome the shortcomings of the conventional three-dimensional image generation, and this should be an optimal solution.

The present invention is to provide a system and method for adjusting the depth of field of a multi-depth display, which can control the distance between an adjustable micro-projector and a fixed micro-projector or/and change the angle of the optical path. It is possible to increase the formation of multiple overlapping focused images for the purpose of displaying multiple depth of field images.

The above system and method for adjusting the depth of field of a multi-depth display can be achieved, wherein the system for adjusting the depth of field of the multi-depth display using multiple light sources or multiple light source angles comprises: at least one mirror; at least one fixed miniature a projector that projects a two-dimensional image onto the mirror; one or more adjustable micro-projectors are disposed on one side of the fixed micro-projector for projecting a two-dimensional image to the reflection And a reflected beam focusing processor coupled to the fixed pico projector and the adjustable micro projector for controlling the fixed micro projector and the adjustable micro projector to project to the The path of the reflected beam produced on the mirror to make the mirror The reflected beams intersect in opposite directions of the reflected beam to form a virtual image to form a multi-overlapping focused imaging and achieve multi-depth image effects.

More specifically, the fixed pico projector is a germanium-based liquid crystal laser projection device.

More specifically, the adjustable micro-projector is a 矽-based liquid crystal laser projection device.

More specifically, the adjustable micro-projector is a movable micro-projection device, a micro-projection device capable of changing the projection direction, or a micro-projection device capable of moving and changing the projection direction.

More specifically, the distance between the adjustable micro-projector and the fixed micro-projector can be controlled to move the virtual image formed by the overlapping focus closer to or away from the mirror to achieve multi-depth image control. effect.

More specifically, the ability to control the angle of the light path produced by the adjustable microprojector enables the virtual image formed by the overlapping focus to move closer to or away from the mirror.

More specifically, the image output position of the adjustable micro projector can be controlled to move the virtual image formed by the overlapping focus closer to or away from the mirror.

More specifically, the further includes more than two mirrors, and the adjustable micro projector and the fixed micro projector can be respectively projected on mirrors at different positions, and mirrors at different positions The separately reflected beams intersect in opposite directions of the reflected beam to form a virtual image.

More specifically, the multi-depth image is a three-dimensional image or a four-dimensional image in which the depth of field changes with time.

More specifically, the fixed pico projector can be set in any one or more directions More than one adjustable micro projector.

More specifically, the more the number of adjustable micro-projectors, the more overlapping focus that can be formed simultaneously, the more obvious the effect of multiple depth-of-field images.

More specifically, the fixed micro-projector and the adjustable micro-projector output the same two-dimensional image pixel values.

More specifically, the reflected beam focusing processor can control the position of the multi-overlapping focus imaging to be formed by different beam paths reaching a single identical eye or after different beam paths respectively reaching different eyes.

The method of the present invention for adjusting the depth of field of a multi-depth display using multiple light sources or multiple light source angles is as follows: (1) transmitting at least one fixed micro projector and one or more adjustable micro projectors The two-dimensional images are respectively projected onto at least one of the mirrors; and (2) the light beams reflected by the mirrors are intersected in opposite directions of the reflected light beams to form a virtual image to form a multi-overlapping focused image and to achieve multiple depth of field images. effect.

More specifically, the fixed pico projector and the adjustable micro projector are projection devices using a silliman-based liquid crystal laser projection technology.

More specifically, the controlling the distance between the fixed pico projector and the adjustable micro projector can move the virtual image formed by the overlapping focus closer to or away from the mirror to achieve the effect of multiple depth image control. .

More specifically, the ability to control the angle of the light path produced by the adjustable microprojector enables the virtual image formed by the overlapping focus to move closer to or away from the mirror.

More specifically, the image output position of the adjustable micro projector can be controlled to move the virtual image formed by the overlapping focus closer to or away from the mirror.

More specifically, the adjustable micro-projector and the fixed micro-projector can be respectively projected on mirrors at different positions, and the reflected light beams respectively reflected by the mirrors at different positions are reflected beams. The opposite direction meets to form a virtual image.

More specifically, the multi-depth image is a three-dimensional image or a four-dimensional image in which the depth of field changes with time.

More specifically, the more the number of the fixed micro-projector and the adjustable micro-projector, the more the number of times of focusing at the same point, the more obvious the effect of the multi-depth image.

More specifically, when the fixed micro-projector and the reflected light beam generated by the adjustable micro-projector projected onto the mirror cannot overlap, the second output of the adjustable micro-projector can be further controlled. Dimensional image, such that the pixel position of the virtual image generated by the adjustable micro-projector to the mirror can be superimposed on the reflected beam generated by the fixed micro-projector projected onto the mirror (can be controlled by The distance between the adjustable micro projector and the fixed pico projector, or the angle of the light path of the adjustable micro projector, the image output position, or the adjustable micro projector and the fixed The miniature projectors are respectively projected on different mirrors to correct the case where the focus cannot be overlapped).

More specifically, it is more controllable for the time when the adjustable micro-projector outputs light or image close to or away from the fixed pico projector, and the shorter the time or the image of the adjustable micro-projector approaches or stays away from the fixed The shorter each distance of the image output by the pico-projector, the more overlapping images will be formed, and the more continuous changes in depth of field between images will become clearer.

More specifically, the fixed pico projector and the adjustable micro projector The greater the number, the multiple depths of field used to create different points while focusing simultaneously.

More specifically, the position of the multi-overlapping focus imaging is formed by overlapping different images of different beam paths reaching a single identical eye or different beam paths reaching different eyes respectively.

1‧‧‧Fixed miniature projector

11‧‧‧ Beam

2‧‧‧Adjustable miniature projector

21‧‧‧ Beam

2'‧‧‧Adjustable miniature projector

21’‧‧‧ Beam

3‧‧‧Mirror

31‧‧‧Semi-reflective mirror

32‧‧‧Full reflection mirror

33‧‧‧ total reflection mirror

4‧‧‧Reflected beam focusing processor

5‧‧‧ User's eyes

61‧‧‧User's left eye

62‧‧‧User's right eye

[Fig. 1] Fig. 1 is a schematic structural view of a system and a method for adjusting a depth of field of a multi-depth display according to the present invention.

[Fig. 2] Fig. 2 is a schematic diagram showing an angle reflection of a multi-source or multi-source of a system for adjusting a depth of field of a multi-depth display and a method thereof.

[Fig. 3] is a schematic diagram of virtual image imaging of a system and method for adjusting the depth of field of a multi-depth display according to the present invention.

[Fig. 4A] Fig. 4 is a schematic diagram showing the imaging implementation of a system for adjusting the depth of field of a multi-depth display and a method thereof.

[Fig. 4B] Fig. 4 is a schematic view showing the imaging implementation of a system for adjusting the depth of field of a multi-depth display and a method thereof.

[FIG. 4C] FIG. 4 is a schematic diagram of a post-movement imaging state of a system and method for adjusting depth of field of a multi-depth display.

[Fig. 5] Fig. 5 is a flow chart showing a system for adjusting the depth of field of a multi-depth display and a method thereof.

[FIG. 6] A system for adjusting the depth of field of a multi-depth display and a method thereof See the schematic.

Other details, features, and advantages of the present invention will be apparent from the following description of the preferred embodiments.

Please refer to FIG. 1 , which is a schematic structural diagram of a system and a method for adjusting a depth of field of a multi-depth display according to the present invention. As can be seen from the figure, the system for adjusting the depth of field of a multi-depth display includes a fixed pico projection. 1, one or more adjustable micro-projectors 2, a reflected beam focusing processor 4 and at least one mirror 3, wherein the fixed micro-projector 1 and the adjustable micro-projector 2 are capable of one or two The image is projected onto the mirror 3, and the fixed pico-projector 1 can be configured with one or more adjustable micro-projectors 2 in any or more directions, and the fixed-type micro-projector 1 and The adjustable micro projector 2 is a 矽-based liquid crystal laser projection device (Lcos projection device); therefore, the adjustable micro-projector 2 must be a movable micro-projection device, a miniature capable of changing the projection direction The projection device is also a micro-projection device capable of moving and changing the projection direction, so that the reflected beam focusing processor 4 can move the adjustable micro-projector 2 (change the Adjusting the distance between the adjustable micro-projector 2 and the fixed micro-projector 1 or changing the incident angle of the reflected beam focusing processor 4 (the angle of the generated light path) to control the fixed micro-projection And a path of the reflected beam generated by the adjustable micro-projector 2 projected onto the mirror 3 for projecting the fixed micro-projector 1 and the adjustable micro-projector 2 to the mirror The pixel positions of the images generated on 3 can be overlapped (so that the beams reflected by the mirror intersect in opposite directions of the reflected beam to form a virtual image) to form multi-overlapping focused imaging and multi-depth images are achieved. Like the effect.

In addition to controlling the distance and angle, the image output position of the adjustable micro projector 2 can be controlled, so that even if the distance and the angle do not change, since the adjustable micro projector 2 is projected onto the mirror 3 The image output position is different, and the virtual image formed by the overlapping focus can also be moved closer to or away from the mirror 3; in addition, more than two mirrors 3 can be used, and when the adjustable micro projector 2 and the fixed type When the micro projectors 1 are respectively projected on the mirrors 3 at different positions, the beams respectively reflected by the mirrors 3 at different positions intersect in the opposite direction of the reflected beam to form a virtual image, so when the mirror 3 is controlled to be in different positions, At the same time, it is also possible to move the virtual image formed by the overlapping focus closer to or away from the mirror 3.

The multi-source or multi-source angle is projected as shown in Fig. 2, since the fixed micro-projector 1 is generally matched with at least two adjustable micro-projectors 2, so that the fixed micro-projector 1 In what direction projection, at least two adjustable micro projectors 2 can include all ranges of the image projected by the fixed pico projector 1 in any direction, since if only one adjustable micro projector 2 is used, The adjustable micro projector 2 has to be moved to the left in order to overlap the image projected by the fixed micro projector 1 on the left side, but when it exceeds the intermediate line of the image projected by the fixed micro projector 1, the fixed type The right image projected by the micro projector 1 may not overlap with the image projected by the adjustable micro projector 2, so in order to avoid a similar situation, at least one adjustable micro projector 2 is disposed on each of the left and right sides. In order to avoid non-overlapping situations; but it is also possible to have this happen up and down, so the adjustable micro projector 2 has two but two. You are capable of more than one can be provided in one or more directions according to any one of the stationary adjustable micro projector micro projector 2, so that the stationary micro projector a projected image are capable of being All of the adjustable micro projectors 2 overlap.

The actual projection situation is shown in FIG. 3 and FIG. 4A, and the third, fourth, and fourth embodiments are all half-side of the fixed micro-projector 1, so that only one fixed micro-projector 1 and one can be used. The adjustment micro-projector 2 is described. First, as seen from FIG. 3, the mirror 3 has a semi-reflecting mirror surface 31 and a total reflection mirror surface 32, 33. When the fixed micro-projector 1 and the adjustable micro-projection The light beams 11, 21 projected by the device 2, wherein the total reflection mirror surface 32 of the light beam 11, 21 hitting the mirror 3 is reflected again to the total reflection mirror surface 33, and then reflected to the half mirror surface 31, the reflection The light beam reflected by the half mirror surface 31 of the mirror 3 will intersect in the opposite direction of the reflected light beam to form a virtual image A; and as can be seen from FIG. 4A, when the fixed micro projector 1 and the adjustable micro projector 2 are When the two-dimensional image (light beam 11, 21) is projected on the mirror 3, since the fixed micro-projector 1 and the adjustable micro-projector 2 are reflected by the mirror 3, the opposite of the reflected beam The directional intersections overlap to form a virtual image A that can be seen by the user's eyes 5 (three-dimensional image); however, when the adjustable micro-projector 2 is moved in the other direction, as shown in FIG. 4B (in order to separate the non-moving adjustable micro-projector from the moved adjustable micro-projection) , the unmovable adjustable micro-projector is labeled 2, the moved non-movable adjustable micro-projector is labeled 2'), so when the adjustable micro-projector label 2' is moved, The two-dimensional image projected by the adjustable micro-projector 2' will be overlapped with the two-dimensional image projected by the fixed micro-projector 1 and reflected by the mirror 3 to form a virtual image B (three-dimensional image), and then 4C, it can be found that when the adjustable micro projector 2' is moved, the virtual image A closer to the mirror 3 will move to the virtual image B farther from the mirror 3; Is two three-dimensional images, and the above is only controlling the distance between the fixed pico-projector 1 and the adjustable micro-projector 2 (the adjustable micro-projector 2 must be able to The movable micro projector 2 can also adjust the angle of the generated light path, and the formed image can not only move far and near, but can change in multiple angles and directions, and add time control factors. The depth of field of the three-dimensional image is changed with time, so that the concept of the four-dimensional image can be formed; therefore, the pixel value of the two-dimensional image outputted by the fixed micro-projector 1 and the adjustable micro-projector 2 can be the same (the fixed The micro-projector 1 is the same image as the two-dimensional image output by the adjustable micro-projector 2, but by changing the optical path angle of the adjustable micro-projector 2, the virtual position can be changed.

In the above embodiment, the following situations may occur: (1) when both the fixed micro projector 1 and the adjustable micro projector 2 are one, since the adjustable micro projector 2 can control the output light Or the time when the image is close to or away from the fixed pico-projector 1, so the shorter the time or the shorter the distance of the image of the adjustable micro-projector 2 near or away from the image output by the fixed micro-projector 1 , the more overlapping images are formed, and the more continuous changes in depth of field between images will be clearer; (2) when the fixed pico projector 1 is one, and the adjustable micro projector 2 is more than one At the same time, the number of overlapping focusings formed by the two-dimensional image projected by the fixed micro projector 1 is increased, so that the more the number of the adjustable micro projectors 2, the more obvious the effect of the multiple depth images. (3) When there is more than one of the fixed pico-projector 1 and the adjustable micro-projector 2, as described above, more different positions of focus can be formed, and thus multiple depths of field are simultaneously formed.

In addition, wherein the fixed pico projector 1 and the adjustable micro projector 2 are projected When the reflected beam generated on the mirror 3 cannot be overlapped, the reflected beam focusing processor 4 can further control the two-dimensional image output by the adjustable micro-projector 2 to make the adjustable micro-projector 2, the pixel position of the image generated on the mirror 3 can be superimposed on the reflected beam generated by the fixed pico projector projection 1 to the mirror (the adjustment is through the control of the adjustable micro projector) 2 the distance from the fixed pico-projector 1, or the angle of the light path of the adjustable micro-projector 2, the image output position, or the adjustable micro-projector 2 and the fixed micro-projection The projectors 1 are respectively projected on different mirrors 3 to correct the case where the focus cannot be overlapped).

In addition, the flow chart of adjusting the depth of field distance of the multi-depth display of the present invention, as shown in FIG. 4, is as follows: (1) transmitting at least one fixed micro-projector and one or more adjustable micro-projectors The two-dimensional images are respectively projected onto at least one mirror 401; and (2) the light beams reflected by the mirrors are intersected in opposite directions of the reflected light beam to form a virtual image to form a multi-overlapping focused image and to achieve multiple depth of field images. Effect 402.

From the perspective of a single eye, as shown in FIG. 4A and FIG. 4B, the overlapping position reaches the eye through different beam paths to form an optical focus, so that the focus position of the moving virtual image overlap can be further controlled to achieve different focusing. Distance; however, if it is viewed by both eyes (the user's left eye 61, the user's right eye 62), a virtual image is formed in front of the user's left eye 61 and the user's right eye 62, respectively. When overlapping with an overlapping virtual image C, it is possible to form a stereo depth effect.

The system and method for adjusting the depth of field distance of a multi-depth display provided by the present invention have the following advantages when compared with other conventional technologies:

1. The present invention is capable of using at least one set of adjustable microprojectors and more than one set of fixed pico projectors, and through the distance between the adjustable pico projector and the fixed pico projector, or changing the The angle of the optical path of the adjustable micro-projector, the image output position, or the adjustment of the adjustable micro-projector and the fixed micro-projector respectively on different mirrors to form more than one overlap The focused image is used for the purpose of displaying multiple depth of field images, which will overcome the shortcomings of the conventional three-dimensional image.

2. The method for generating a stereoscopic image of the present invention does not require a complicated device, and since the present invention forms a stereoscopic virtual image by using a plurality of overlapping and focused images, and by further controlling, a stereoscopic image and a stereoscopic image can be obtained. The more obvious the visual sense, the more the stereoscopic image can be seen by the user, and the situation in which the continuity of the stereoscopic image and the stereoscopic image is not obvious is not the case.

The present invention has been disclosed in the above embodiments, and is not intended to limit the present invention. Any of those skilled in the art can understand the foregoing technical features and embodiments of the present invention without departing from the invention. In the spirit and scope, the scope of patent protection of the present invention is subject to the definition of the claims attached to the present specification.

1‧‧‧Fixed miniature projector

2‧‧‧Adjustable miniature projector

3‧‧‧Reflected beam focusing processor

4‧‧‧Mirror

Claims (25)

A system for adjusting a depth of field of a multi-depth display, comprising: at least one mirror; at least one fixed micro-projector projecting a two-dimensional image onto the mirror; and one or more adjustable micro-projectors, And disposed on one side of the fixed pico projector for projecting a two-dimensional image onto the mirror; and a reflected beam focusing processor coupled to the fixed micro projector and the adjustable micro projection Connected to control the path of the fixed micro-projector and the reflected beam generated by the adjustable micro-projector projected onto the mirror, so that the reflected light of the mirror is opposite to the reflected beam The intersection of the directions forms a virtual image to form a multi-overlapping focused imaging and achieves the effect of multiple depth of field images; in addition, it is more capable of controlling the time when the adjustable micro-projector outputs light or images approaching or away from the fixed pico projector, and time The shorter the image of the pico-projector that is close to or away from the image output by the fixed pico projector, the shorter each distance Overlays into focus will be more, and varies continuously varying the depth of field will be more apparent between the images. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the fixed pico projector is a fluorene-based liquid crystal laser projection apparatus. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the adjustable micro-projector is a 矽-based liquid crystal laser projection device. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the adjustable micro-projector is a movable micro-projection device, a micro-projection device capable of changing a projection direction, or a movable And a miniature projection device that changes the direction of projection. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the distance between the adjustable micro-projector and the fixed micro-projector can be controlled, and the virtual image formed by the overlapping focus can be moved closer to or Stay away from the mirror. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the angle of the light path generated by the adjustable micro-projector can be controlled, and the virtual image formed by the overlapping focus can be moved closer to or away from the mirror . A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the image output position of the adjustable micro-projector can be controlled, and the virtual image formed by the overlapping focus can be moved closer to or away from the mirror. A system for adjusting a depth of field of a multi-depth display according to claim 1, further comprising two or more mirrors, wherein the adjustable micro projector and the fixed pico projector are respectively projected in different positions On the mirror, the beams reflected by the mirrors at different positions intersect in opposite directions of the reflected beam to form a virtual image. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the multi-depth image is a three-dimensional image or a four-dimensional image whose depth of field changes with time. A system for adjusting a depth of field of a multi-depth display as claimed in claim 1, wherein the fixed pico-projector is capable of arranging more than one adjustable micro-projector in any one or more directions. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the more the number of the adjustable micro-projectors, the more overlapping focusings that can be simultaneously formed, and the effect of the multi-depth image is more obvious. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the fixed micro-projector and the two-dimensional image output by the adjustable micro-projector have the same pixel value. A system for adjusting a depth of field of a multi-depth display according to claim 1, wherein the reflected beam focusing processor is capable of controlling the position of the multi-overlapping focused imaging to be formed by different beam paths reaching a single identical eye or different beams. The virtual images after the paths reach different eyes respectively overlap and form. A method for adjusting a depth of field distance of a multi-depth display, the method comprising: projecting a two-dimensional image onto at least one mirror through at least one fixed micro-projector and one or more adjustable micro-projectors; The light beam reflected by the mirror intersects in the opposite direction of the reflected light beam to form a virtual image to form a multi-overlapping focused image and achieve the effect of multiple depth of field images; and wherein the adjustable micro projector output light or image is more controllable The time of approaching or moving away from the fixed pico-projector, and the shorter the time or the shorter the distance of the image of the adjustable micro-projector approaching or away from the image output by the fixed micro-projector, the overlapping focus is formed The more images there will be, the more clearly the continuous changes in depth of field will change between images. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the fixed pico projector and the adjustable micro projector are projection devices using a silliman-based liquid crystal laser projection technology. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein controlling the distance between the fixed pico projector and the adjustable micro projector enables the virtual image formed by overlapping focusing to be close to or away from the The mirror moves. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the angle of the light path generated by the adjustable micro-projector can be controlled, and the virtual image formed by the overlapping focus can be moved closer to or away from the mirror mobile. A method for adjusting a depth of field of a multi-depth display as claimed in claim 14, wherein the image output position of the adjustable micro-projector can be controlled to move the virtual image formed by the overlapping focus closer to or away from the mirror. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the adjustable micro-projector and the fixed micro-projector are further capable of being projected on mirrors at different positions, respectively, and different The beams reflected by the mirrors at the position intersect in opposite directions of the reflected beam to form a virtual image. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the multi-depth image is a three-dimensional image or a four-dimensional image whose depth of field changes with time. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the more the number of the fixed micro-projector and the adjustable micro-projector, the more the number of times of focusing at the same point, the multi-depth image The effect will be more obvious. A method for adjusting a depth of field distance of a multi-depth display according to claim 14, wherein the fixed micro-projector and the reflected beam generated by the adjustable micro-projector projected onto the mirror cannot overlap and focus, Further fine-tuning the two-dimensional image output by the adjustable micro-projector, so that the pixel position of the virtual image generated by the adjustable micro-projector to the mirror can be further overlapped by the fixed micro-projector to The reflected beam is generated on the mirror (adjusting the angle from the image output position to multiple mirrors). A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the fixed micro-projector and the adjustable micro-projector are provided in a plurality of positions to simultaneously form different depths of different points while simultaneously focusing. appear. A method for adjusting a depth of field distance of a multi-depth display according to claim 14, wherein the more the number of the mirrors, whether the adjustable micro projector and the fixed pico projector are projected at different or the same position, On the mirror, multiple depths of field that can be used to form different points while focusing simultaneously appear simultaneously. A method for adjusting a depth of field of a multi-depth display according to claim 14, wherein the position of the multi-overlapping focus imaging is formed by different beam paths reaching a single identical eye or different virtual beam paths respectively reaching different eyes. Then overlap to form.