CN111781739A - Large-depth-of-field variable-viewing-angle three-dimensional display module and augmented reality glasses thereof - Google Patents
Large-depth-of-field variable-viewing-angle three-dimensional display module and augmented reality glasses thereof Download PDFInfo
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- CN111781739A CN111781739A CN202010581602.6A CN202010581602A CN111781739A CN 111781739 A CN111781739 A CN 111781739A CN 202010581602 A CN202010581602 A CN 202010581602A CN 111781739 A CN111781739 A CN 111781739A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0176—Head mounted characterised by mechanical features
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Abstract
The invention belongs to the field of three-dimensional augmented reality display, and relates to a large-depth-of-field variable-viewing-angle three-dimensional display module and augmented reality glasses thereof. The front surface of the shell of the large-field-depth variable-view three-dimensional display module is made of transparent plastic materials, and the shell is provided with three slots, namely an electromagnetic vibration contact extending into the slot, a lens frame slot and a semi-transparent and semi-reflective mirror mounting slot. The two sides of the electromagnetic vibration contact extending into the slot and the slot of the lens frame are arc-shaped, and the electromagnetic vibration contact and the lens frame can be allowed to rotate within a certain range. The semi-transparent semi-reflecting mirror installation slot is circular. The housing is hermetically sealed, i.e., allows only external light to pass through the front surface of the housing when the device is worn by the wearer. The invention increases the imaging depth and realizes the horizontal continuous viewing angle, thereby leading the virtual content to be viewed to be changed in a certain range of horizontal continuous viewing angle when the wearer rotates the head to change the viewing angle, and reducing the dizzy feeling caused by the difference between the physiological convergence and the viewing content.
Description
Technical Field
The invention belongs to the field of three-dimensional augmented reality display, and relates to a large-field-depth variable-viewing-angle three-dimensional display module and augmented reality glasses thereof.
Background
Augmented Reality (AR) is a technology for superimposing virtual information on a real-world image to perform human-computer interaction with a wearer, and is currently widely used; the integrated imaging three-dimensional display technology is a display technology capable of providing a certain range of viewing angle and depth, has the characteristic of full-real-light-field display, and can reduce the dizzy feeling of a wearer while providing three-dimensional display.
In the traditional integrated imaging technology, the resolution of a display unit is limited, the object distance is fixed, and the imaging depth is limited; the traditional method for applying the integrated imaging technology and enhancing the display equipment cannot utilize the advantage of variable viewing angle brought by the integrated imaging technology, and because the angle of the glasses and the angle of human eyes are fixed, the relationship between a display system fixed with the glasses shell and the human eyes cannot be changed when a wearer changes the viewing angle.
When the AR glasses display the stereo images, generally, images with certain visual angle difference are respectively provided for two eyes to enable the eyes to generate stereo vision, but the method needs to determine the distance between the imaging content and a viewer during display and then determines the visual angle difference of the two images according to the interpupillary distance of the eyes, when a user tries to view the content which is farther away or closer to the user, due to physiological convergence reaction, the focusing angle of the two eyes is changed, the displayed images are still the views at the original distance, and the dazzling feeling can be generated when the eyes are in the condition for a long time. The root cause of this problem is the inability of conventional binocular stereopsis devices to provide light field information.
Disclosure of Invention
The invention provides a large-field-depth variable-viewing-angle three-dimensional display module and augmented reality glasses thereof, which are based on the purpose that a display unit vibrates to improve the imaging depth and increase the imaging depth. The display system and the glasses shell are changed by measuring the head posture, so that the horizontal continuous viewing angle is realized, and the virtual content viewed by a wearer can be changed within a certain range of the horizontal continuous viewing angle when the viewing angle is changed by rotating the head. By utilizing the integrated imaging technology and combining the design of the pair of glasses structure, the visual dizzy feeling is improved by providing light field information, and the dizzy feeling caused by the difference between the physiological convergence and the watching content is reduced.
The device is a whole and when performing the above-mentioned functions the device has units responsible for different functions, which are designed to perform the respective functions separately.
The invention provides a novel AR (augmented reality) glasses based on an integrated imaging system, and the AR glasses are optimized aiming at the first two problems of fixed field angle and depth of field of the system. The integrated imaging is a naked-eye 3D display technology with a good prospect, and the integrated imaging system can provide a real light field image with rich colors, a wide viewing angle and a large depth of field. The system is miniaturized, and the AR glasses with good virtual-real fusion effect can be formed by utilizing the real three-dimensional display characteristic of the system. Different from the existing free-form surface projection type AR glasses, the invention can provide not only a color transflective image, but also depth information, so that a viewer has better immersion experience. However, because the relative positions of the AR glasses on human eyes are always unchanged, real 3D multi-view information cannot be embodied, a scheme that the display system can rotate relative to the human eyes is provided, the effect of utilizing an integrated imaging horizontal view angle is obtained by a method of controlling the rotation of the display system through real-time attitude measurement, and the problem that the horizontal view angle cannot be effectively utilized when the integrated imaging technology is applied to the AR is solved. In addition, a micro-display vibration display scheme is provided for solving the problem that the depth of field effectively displayed by a miniaturized integrated imaging system is compressed, and the problem of small display depth is solved by a method of driving the micro-display to vibrate and display by an electromagnetic vibration device. This patent provides a partial theoretical and hardware solution to the AR field.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the variable visual angle three-dimensional display module of big depth of field includes: the micro-lens unit comprises a steering engine rotating unit, a connecting rod, an electromagnetic vibration unit, a micro-display, a Snell lens and a micro-lens array in the micro-lens unit, a bearing device of the micro-lens unit, a semi-transparent and semi-reflective mirror and a shell.
The front surface of the shell is made of transparent plastic materials, the shell is provided with three slots, namely an electromagnetic vibration contact extending into the slot, a lens frame slot and a semi-transparent semi-reflecting mirror mounting slot. The two sides of the electromagnetic vibration contact extending into the groove and the groove of the lens frame are arc-shaped, and the electromagnetic vibration contact and the lens frame can be allowed to rotate within a certain range. The semi-transparent semi-reflecting mirror installation slot is circular. The flexible cushion made of rubber materials is arranged at the inclined position close to the nose bridge, so that the oppressive feeling to the nose bridge when the nose bridge is worn is relieved. The housing is hermetically sealed, i.e., allows only external light to pass through the front surface of the housing when the device is worn by the wearer.
The steering engine rotating unit is fixed on the outer side of the shell, a rotating shaft of the steering engine rotating unit is fixed with the electromagnetic vibration unit through a connecting device, the upper portion of the rotating shaft is fixed with a connecting rod, the connecting rod is connected with the lens bearing device, and the lens bearing device is arranged in the shell. When the system works, the rotation unit drives the electromagnetic vibration unit and the lens bearing device to rotate around the Z axis simultaneously through the rotation shaft, and the micro display, the micro lens array and the Snell lens are always kept parallel in the process.
The back of the micro-display is superposed and fixed with the side face of the vibration probe of the electromagnetic unit, the micro-display is arranged in the shell, the electromagnetic vibration unit can drive the micro-display to vibrate in the direction vertical to the display plane of the micro-display, and the distance between the micro-lens array, the Snell lens and the micro-display is changed at the moment.
The semi-transparent semi-reflecting mirror fixing device fixes the semi-transparent semi-reflecting mirror and the shell, and keeps an included angle of 45 degrees between the front surface and the back surface of the semi-transparent semi-reflecting mirror and the shell. The superposition of the virtual information and the real world information is realized through a semi-transparent semi-reflecting mirror positioned in the middle of the glasses body.
It should be particularly stated that the calculation control circuit is arranged on both sides of the frame, which is not particularly explained in the present invention and is not shown in the figures.
The invention has the beneficial effects that:
the invention increases the imaging depth and realizes the horizontal continuous viewing angle, thereby leading the virtual content viewed by the wearer to be changed in a certain range of horizontal continuous viewing angle when the viewing angle is changed by the rotating head part, and reducing the dizzy feeling caused by the difference between the physiological convergence and the viewing content.
Drawings
FIG. 1 is a front view of a large depth-of-field variable viewing angle display module;
FIG. 2 is a top view of a large depth-of-field variable viewing angle display module;
FIG. 3 is an isometric view of a large depth-of-field variable viewing angle display module;
FIG. 4 is a top view of augmented reality glasses;
FIG. 5 is a right side view of augmented reality glasses;
FIG. 6 is a schematic diagram of raising imaging depth;
FIG. 7(a) is a pictorial isometric view of the principal elements of the principles of continuous view imaging;
FIG. 7(b) is a schematic view of the operation in front view;
FIG. 7(c) is a schematic view showing the operation of the deflection of the observation angle;
FIG. 8 is a characteristic view of the housing;
FIG. 9 is a schematic diagram of an optical imaging structure.
Fig. 10 is a schematic diagram of integrated imaging maximum horizontal visibility range.
In the figure: 1, a steering engine rotating unit; 101 a rotating shaft; 102 a connecting device for the rotating shaft and the electromagnetic rotating unit; 2, connecting rods; 3 an electromagnetic vibration unit; 301 the electromagnetic unit vibrates the probe; 4 micro-display; 5 a microlens unit; 501 a micro-lens array; a 502 snell lens; 6 bearing device of micro lens unit; 7, a semi-transparent semi-reflecting mirror; 8, a semi-transparent and semi-reflective mirror fixing device; 9 a housing; 10 a first attitude sensor; 11 a second attitude sensor; 12 a spectacle frame; 13 a drive circuit; 14 micro display driving circuit.
Detailed description of the preferred embodiment
In order to further explain the technical solution of the present invention, the present invention is explained in detail below with reference to the accompanying drawings.
Example 1:
the variable visual angle three-dimensional display module of big depth of field includes: the micro-lens steering mechanism comprises a steering engine rotating unit 1, a connecting rod 2, an electromagnetic vibration unit 3, a micro-display 4, a Snell lens 502 and a micro-lens array 501 in a micro-lens unit 5, a bearing device 6 of the micro-lens unit, a half mirror 7 and a shell 9.
As shown in fig. 8, the front surface 901 of the housing 9 is made of a transparent plastic material, and the housing has three slots, namely, an electromagnetic vibration contact insertion slot 902, a lens holder slot 903, and a half mirror mounting slot 904. The sides of the electromagnetic oscillating contact that extend into the slot 902 and the lens holder slot 903 are curved to allow the electromagnetic oscillating contact and the lens holder to rotate within a certain range. The half mirror mounting slot 904 is circular. The flexible pad 905 made of rubber materials is arranged at the inclined position close to the nose bridge, so that the pressure feeling to the nose bridge when the nose bridge is worn is relieved. The housing is hermetically sealed, i.e., allows only external light to pass through the front surface 901 of the housing when the device is worn by the wearer.
The steering engine rotating unit 1 is fixed on the outer side of the shell 9, a rotating shaft 101 of the steering engine rotating unit 1 is fixed with the electromagnetic vibration unit 3 through a connecting device 102, the upper portion of the rotating shaft 101 is fixed with the connecting rod 2, the connecting rod 2 is connected with the lens bearing device 6, and the lens bearing device 6 is arranged in the shell 9. When the system works, the rotation unit 1 drives the electromagnetic vibration unit 3 and the lens bearing device 6 to rotate around the Z axis simultaneously by the rotation shaft 101, and the micro display 4, the micro lens array 501 and the Snell lens 502 are always parallel in the process.
The back of the micro-display 4 is overlapped and fixed with the side of the electromagnetic unit vibration probe 301, the micro-display 4 is arranged in the shell 9, the electromagnetic vibration unit 3 can drive the micro-display 4 to vibrate in the direction vertical to the display plane of the micro-display 4, and at the moment, the distances between the micro-lens array 501, the Snell lens 502 and the micro-display 4 are changed.
The half mirror fixing device 8 fixes the half mirror 7 and the housing 9, and keeps an included angle of 45 degrees between the front and back surfaces of the half mirror 7 and the housing 9. The superposition of the virtual information and the real world information is realized by a half-transmitting half-reflecting mirror 7 positioned in the middle of the glasses body.
The enhanced display eyewear structure further comprising: the device comprises a frame 12, two same and symmetrically arranged attitude sensors, a driving circuit 13 of the electromagnetic vibration unit 3 and a micro display driving unit 14.
The large-depth-of-field variable-viewing-angle three-dimensional display module is fixed right in front of the mirror bracket 12, the driving circuit 13 and the micro display driving unit 14 are fixed on one side of the mirror bracket 12, and the first attitude sensor 10 and the second attitude sensor 11 are respectively and symmetrically arranged on two sides of the mirror bracket 12.
When the head of the wearer rotates, the two attitude sensors can detect the rotation information of the head. After the first attitude sensor 10 and the second attitude sensor 11 detect the angle information, the control connecting rod 2 rotates, the electromagnetic vibration unit 3 and the micro lens unit 5 are driven by the steering engine rotating unit 1 to rotate relative to the shell 9, and the electromagnetic vibration unit 3 and the micro display 4 are fixed, which is equivalent to the rotation of the micro display 4 and the micro lens unit 5.
Example 2:
the steering engine rotation unit 1 is specifically described as follows: it should be noted that, the choice of the steering engine needs to consider the driving capability, size and weight, but the choice of the steering engine is not a critical part of the invention, and the invention does not have special requirements on the choice of the steering engine in the implementation process.
The electromagnetic vibration unit 3 is specifically explained as follows: the model of the electromagnetic vibration unit used in the implementation process of the invention is HB005008 DC5V push-pull type electromagnetic valve, and particularly shows that the electromagnetic vibration frequency of the electromagnetic vibration unit can reach 30 HZ.
The micro display 4 is specifically described as follows: the invention is based on a Sony ECX334C model miniature display, which has key indexes having influence on other related component parameters of the invention as shown in Table 1.
The microlens unit 5 is specifically explained as follows: it should be noted that, in order to achieve excellent imaging effect, the parameters of the micro-lens should be matched with the relevant parameters of the selected micro-display, the invention adopts the SONY ECX334 type micro-display, and in order to achieve matching, the relevant parameters of the micro-lens unit are shown in Table 2.
The specific description of the drive circuit 13 is as follows: the drive circuit comprises two parts: a drive circuit of the electromagnetic vibration unit and a drive circuit of the rotation unit. The driving circuit of the rotating unit is realized by adopting a single-path PWM pulse control mode. The electromagnetic vibration unit driving circuit is realized by adopting a half-bridge scheme based on PWM control.
TABLE 1 micro display key parameter table
TABLE 2 microlens Unit Key parameter Table
| Overall size | Single lens unit size |
| 10mm x 10mm | 1mmx1mm |
Referring to fig. 1, the electromagnetic vibration unit 3 drives the micro-display 4 to perform high-frequency vibration in a direction perpendicular to the display plane, and the distance between the micro-display 4 and the micro-lens unit 5 is continuously changed in the process. Referring to fig. 6, three positions at different times are cut to explain the principle, when the micro-display 4 is at the first position, according to the gaussian imaging formula, the emergent light of the micro-display 4 passes through the micro-lens unit 5 to form the clearest image point on the central depth plane of the first position, and at the first position, the edge depth plane forms a relatively blurred image spot, the size of the image spot on the edge depth plane is the maximum resolution size of human eyes, and the image spot between two edge depth planes is smaller, so the range between two edge depth planes is the depth range in which the micro-display 4 can image at the first position. When the micro-display 4 vibrates to the second position, the imaging depth range is changed to the space formed by the center depth plane and the edge plane of the second position, and because the micro-display 4 vibrates at high frequency, due to the phenomenon of vision persistence of human eyes, for the human eyes, two imaging ranges are imaged, namely the range of the imaging depth determined by the original first position is changed to the depth range formed by the three positions, and the imaging depth is improved.
As shown in fig. 6, according to the gaussian imaging formula
Ideal resolution R of central depth planeiIs shown as
Where a is the distance of the lens array from the central plane, RDFor the resolution of the microdisplay, G is the distance from the plane of the microdisplay to the microlens array, and the resolution of the edge depth plane is expressed as
D is the imaging depth of field range, and theta is the field angle. Considering the minimum resolution angle of the human eye, the resolution clearly observed when viewed at different distances is
Viewing sharpness reduction may allow some reduction, by a factor of α (0,1), so the depth of field is less than the following equation, given the minimum resolution of the human eye resolution:
when there are multiple center depth planes, the depth of field of the center depth plane farthest from the human eye and the maximum depth of field of the nearest center depth plane are:
and
the improved system can provide an increase in depth of field of:
wherein a ismin,amaxThe equation for gaussian imaging can be expressed as:
by
The fixed object distance is set as G when the vibration is not generated, and the increased vibration range is set as 2 delta, so that the vibration is generated
Therefore, the vibration range of the display plane is enlarged, and the effective depth of field of the imaging system is increased.
As shown in fig. 4, when the head of the wearer rotates, the two attitude sensors can detect the rotation information of the head. According to the rotation information, the electromagnetic vibration unit 3 and the micro lens unit 5 are driven by the steering engine rotation unit 1 to rotate relative to the shell 9, and the electromagnetic vibration unit 3 and the micro display 4 are fixed, which is equivalent to the rotation of the micro display 4 and the Snell lens 502. Fig. 7(b) is a schematic diagram of the operation of the wearer when looking straight ahead, the emergent light of the micro-display 4 is reflected by the half mirror 7 through the micro-lens unit 5 like a human eye, which is equivalent to a virtual image constructed right ahead of the wearer; fig. 7(c) shows the operation of the wearer when the viewing angle is changed, in which the human eye rotates by an angle α with respect to the front viewing direction toward the point B of the display content, and after the angle information is detected by the first attitude sensor 10 and the second attitude sensor 11, the control link 2 rotates the micro-display 4 and the micro-lens unit 5 by an angle α with respect to the point a, and at this time, the virtual image reflected by the half mirror 7 is as shown in the figure, which is equivalent to the case where the human eye is viewing the display content from a direction deviated toward the point B, and the observer sees a three-dimensional object at an angle deviated toward the point B, and the horizontally continuous viewing angle provided by the integral imaging is well utilized.
As shown in fig. 10, the integrated imaging maximum level visible range is:
wherein L is the distance from the human eye to the microlens array, N is the number of the microlens units in the transverse direction, P is the solution of a single lens unit, and G is the distance from the display to the microlens units. The relative imaging system of wearable augmented reality glasses people's eye of tradition can't change, and if the head produced the rotation, the horizontal observation visual angle of monocular still does not change when the content is unchangeable. The viewing range w is approximately equal to the diameter R of the pupil, i.e. w-R. When the display can be rotated, the viewing range becomes:
w'＝w+2ltanθ
w'≤W (6)
l is the distance from the human eye to the central plane, and the larger the rotatable angle, the larger the viewing range, which is at most the viewing range W allowed by the system.
Fig. 9 is a schematic diagram of a main optical imaging structure, light emitted from the micro-display 4 first passes through the micro-lens array 501, then passes through the snell lens 502 to be amplified by a certain factor, and finally is refracted by the half mirror 7 to enter the eye pupil of an observer. It should be noted that, in the implementation process, the optical structure has strict requirements on the position relationship between the 501 microlens array, the 502 fresnel lens and the microdisplay 4, and the carrying device of the 6 microlens unit of the present invention can adjust the positions of the 501 microlens array and the 502 fresnel lens to meet the requirements on the position relationship between the 501 microlens array, the 502 fresnel lens and the microdisplay 4.
Claims (4)
1. The variable visual angle three-dimensional display module of big depth of field, its characterized in that includes: the micro-lens steering engine comprises a steering engine rotating unit (1), a connecting rod (2), an electromagnetic vibration unit (3), a micro-display (4), a Snell lens (502) and a micro-lens array (501) in a micro-lens unit (5), a bearing device (6) of the micro-lens unit, a half-transmitting and half-reflecting mirror (7) and a shell (9);
the front surface (901) of the shell (9) is made of transparent plastic materials, the shell is provided with three slots, namely an electromagnetic vibration contact extending into the slot (902), a lens frame slot (903) and a half-mirror installation slot (904); the two sides of the electromagnetic vibration contact extending into the slot (902) and the lens holder slot (903) are arc-shaped, so that the electromagnetic vibration contact and the lens holder can be allowed to rotate within a certain range; the semi-transparent semi-reflecting mirror mounting slot (904) is circular;
the steering engine rotating unit (1) is fixed on the outer side of the shell (9), a rotating shaft (101) of the steering engine rotating unit (1) is fixed with the electromagnetic vibration unit (3) through a connecting device (102), a connecting rod (2) is fixed above the rotating shaft (101), the connecting rod (2) is connected with a lens bearing device (6), and the lens bearing device (6) is arranged in the shell (9); when the system works, the rotating unit (1) drives the electromagnetic vibration unit (3) and the lens bearing device (6) to rotate around the Z axis simultaneously through the rotating shaft (101), and the micro display (4) is always parallel to the micro lens array (501) and the Snell lens (502) in the process;
the back surface of the micro-display (4) is superposed and fixed with the side surface of the electromagnetic unit vibration probe (301), the micro-display (4) is arranged in the shell (9), the electromagnetic vibration unit (3) can drive the micro-display (4) to vibrate in the direction vertical to the display plane of the micro-display (4), and the distances among the micro-lens array (501), the Snell lens (502) and the micro-display (4) are changed;
the semi-transparent semi-reflecting mirror fixing device (8) fixes the semi-transparent semi-reflecting mirror (7) and the shell (9), and keeps an included angle between the front surface and the back surface of the semi-transparent semi-reflecting mirror (7) and the shell (9) at 45 degrees; the superposition of the virtual information and the real world information is realized by a half-transmitting half-reflecting mirror (7) positioned in the middle of the glasses body.
2. The large depth of field variable viewing angle three dimensional display module of claim 2, wherein the housing (9) comprises a flexible pad (905) to relieve the pressure on the bridge of the nose when worn.
3. The large depth-of-field variable-viewing-angle three-dimensional display module according to claim 2, wherein the flexible pads (905) are made of rubber.
4. An enhanced display eyewear structure, comprising: the device comprises a large-depth-of-field variable-viewing-angle three-dimensional display module, a mirror bracket (12), two same and symmetrically-arranged attitude sensors, a driving circuit (13) of an electromagnetic vibration unit (3) and a micro-display driving unit (14);
the large-depth-of-field variable-viewing-angle three-dimensional display module is fixed in front of the mirror bracket (12), the driving circuit (13) and the micro display driving unit (14) are fixed on one side of the mirror bracket (12), and the first attitude sensor (10) and the second attitude sensor (11) are respectively and symmetrically arranged on two sides of the mirror bracket (12);
when the head of the wearer rotates, the two attitude sensors can detect the rotation information of the head; after the first attitude sensor (10) and the second attitude sensor (11) detect angle information, the control connecting rod (2) rotates, the electromagnetic vibration unit (3) and the micro-lens unit (5) are driven by the steering engine rotating unit (1) to rotate relative to the shell (9), and the electromagnetic vibration unit (3) and the micro-display (4) are fixed, so that the micro-display (4) and the micro-lens unit (5) rotate equivalently.
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| US20150362744A1 (en) * | 2012-02-07 | 2015-12-17 | Samsung Display Co., Ltd. | Three-dimensional image display device |
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