A 3D display device and a method for manufacturing the same

Abstract

The present invention relates to the field of 3D display technology, and specifically to a 3D display device and a preparation method thereof. The 3D display device comprises: a display component, wherein a light source is provided in an area surrounded by three sub-pixels in the display component; a back plate, wherein the back plate is arranged on the light emitting surface of the display component; a plurality of driving layers, wherein the plurality of driving layers are made of photodeformable materials, and the plurality of driving layers are arranged outside the encapsulation layer of the back plate, at positions corresponding to the plurality of sub-pixels one by one; and a microlens array, wherein the plurality of lenses in the microlens array are correspondingly mounted on the plurality of driving layers; in summary, by adopting the above-mentioned structure, different pixel areas can be displayed on different focal planes, and the focal length can be switched arbitrarily between the near view and the far view of the image, so that the human eye can see different depth of field images, and finally a 3D light field display effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D display, and in particular to a 3D display device and a preparation method thereof. Background Art

[0002] Among the five major human perception pathways, vision accounts for 70% to 80% of the information source, and about 50% of the brain's capacity is used to process visual information. From daily behavior to complex operations, it is highly dependent on our visual perception; however, the existing image acquisition and display loses multiple dimensions of visual information, which forces us to observe the three-dimensional world only through a two-dimensional "window"; light field display is our way of obtaining multi-dimensional visual information. It can simulate the way the human eye perceives light and focuses, dynamically focus on the area where the human eye is looking, and present a more natural sense.

[0003] Microlens array is an important micro-optical component for realizing 3D light field display, and has many unique optical properties. By adjusting parameters such as shape, focal length, arrangement, and duty cycle, the microlens array can achieve specific functions for imaging. Most light field displays on the market currently use basic 3D display technology, such as using cylindrical lens gratings to project light from different pixels into both eyes in different directions to achieve 3D light field display effects.

[0004] The above technology has a defect that the focal length of the lens is fixed on the same focal plane and cannot be adjusted as needed, that is, the depth is simulated on the fixed focal plane to create a stereoscopic visual sense. This presentation method is a depth perception formed by binocular parallax, and does not support dynamic focus adjustment of both eyes. Although the binocular parallax changes, the focus does not change, so it cannot achieve the same synchronous adjustment as watching the real world, which makes it easy to have a convergence and adjustment conflict, resulting in dizziness, nausea and other phenomena. Summary of the invention

[0005] The purpose of the present application is to provide a 3D display device and a manufacturing method thereof, so as to solve the technical problem that the focal length of the microlens array in the existing 3D display device cannot be adjusted.

[0006] (I) Technical solution

[0007] To achieve the above object, the present invention provides a 3D display device in a first aspect, comprising:

[0008] A display component, wherein a light source is provided in an area surrounded by every three sub-pixels in the display component, and the wavelength of light emitted by the light source is different from the wavelength of light emitted by the three sub-pixels;

[0009] A back plate, the back plate being arranged on the light emitting surface of the display assembly;

[0010] A plurality of driving layers, wherein the plurality of driving layers are made of a photodeformable material, and the plurality of driving layers are arranged outside the encapsulation layer of the backplane, at positions corresponding to the plurality of sub-pixels one by one;

[0011] and a microlens array, wherein a plurality of lenses in the microlens array are correspondingly mounted on a plurality of the driving layers;

[0012] After receiving the light emitted by the light source, the driving layer will bend and deform along the vertical direction to change the distance between the lens and the display component.

[0013] As one of the optional solutions of the present technical solution, a micro-nano structure is provided between each of the driving layers and the packaging layer, and the micro-nano structure is composed of a plurality of periodically arranged gratings.

[0014] As one of the optional solutions of the present technical solution, a hydrophobic layer is provided in the gap between every two adjacent gratings.

[0015] As one of the optional solutions of the present technical solution, the gap size between each two adjacent micro-nano gratings is as follows:

[0016]

[0017] Wherein, θ is the incident angle of the light beam; β is the diffraction angle of the light beam passing through the grating; d is the gap between each two adjacent micro-nano gratings, λ is the diffraction wavelength; neff is the effective refractive index; ε i is the dielectric constant; h i is the grating thickness.

[0018] As one of the optional solutions of the present technical solution, a fixing layer is further provided at the intersection of the plurality of driving layers, for fixing one end of the plurality of driving layers.

[0019] As one of the optional solutions of the present technical solution, an anchor layer is provided on the encapsulation layer at a position corresponding to the light source, and the fixing layer is arranged on the anchor layer.

[0020] To achieve the above object, the second aspect of the present invention provides a method for preparing a 3D display device, the method comprising:

[0021] Prepare a display assembly provided with a plurality of light sources;

[0022] Prepare a back plate, and install the back plate on the light emitting surface of the display assembly;

[0023] A plurality of driving layers corresponding to the sub-pixels are prepared by using photodeformable materials;

[0024] Preparing a microlens array on a plurality of the driving layers;

[0025] Applying a layer of adhesive material and forming a support layer by patterning;

[0026] The packaging cover plate is mounted on the support layer and edge packaging is performed.

[0027] As one of the optional solutions of the present technical solution, the step of preparing a display component provided with a plurality of light sources specifically includes:

[0028] Prepare a substrate;

[0029] A light-emitting layer is prepared on the substrate, and a light source is provided in an area surrounded by every three sub-pixels in the light-emitting layer, wherein the wavelength of the light source is different from that of the sub-pixel.

[0030] As one of the optional solutions of the present technical solution, the step of preparing a plurality of driving layers corresponding to the sub-pixels one by one using the photodeformable material specifically includes:

[0031] A layer of photodeformable material is coated and patterned to form a driving layer corresponding to a plurality of sub-pixels.

[0032] As one of the optional solutions of the present technical solution, the step of preparing a plurality of driving layers corresponding to the sub-pixels one by one using the photodeformable material specifically includes:

[0033] Micro-nano structures are prepared at positions of the encapsulation layer of the backplane corresponding to the sub-pixels one by one;

[0034] A layer of photodeformable material is coated and patterned to form a driving layer corresponding to the plurality of micro-nano structures.

[0035] As one of the optional solutions of the present technical solution, after the micro-nano structures are prepared at positions of the encapsulation layer of the backplane corresponding to the sub-pixels one by one, the method further includes:

[0036] A hydrophobic layer is coated, and the hydrophobic layer is defined between every two adjacent gratings by patterning.

[0037] As one of the optional solutions of the present technical solution, the step of preparing a plurality of driving layers corresponding to the sub-pixels one by one using the photodeformable material specifically includes:

[0038] Coating a layer of silica gel, and patterning a position on the encapsulation layer corresponding to the light source to form an anchor layer;

[0039] Coating a layer of photodeformable material and patterning to form a driving layer corresponding to a plurality of sub-pixels;

[0040] A resin layer is coated and patterned to form a fixing layer corresponding to the anchor point layer.

[0041] (II) Beneficial effects

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The present invention provides a 3D display device and a preparation method thereof, the 3D display device comprising: a display component, wherein a light source is provided in an area surrounded by every three sub-pixels in the display component, and the wavelength of the light emitted by the light source is different from the wavelength of the light emitted by the three sub-pixels; a backplane, wherein the backplane is arranged on the light emitting surface of the display component; a plurality of driving layers, wherein the plurality of driving layers are made of photodeformable material, and the plurality of driving layers are arranged outside the encapsulation layer of the backplane, at positions corresponding to the plurality of sub-pixels one by one; and a microlens array, wherein the plurality of lenses in the microlens array are correspondingly mounted on the plurality of driving layers; wherein the driving layer will bend and deform along a vertical direction after receiving the light emitted by the light source, so as to change the distance between the lens and the display component.

[0044] When 3D display is required, it is only necessary to turn on the light source. At this time, after the driving layer receives the light from the light source, Fig. 9 As shown, the wall surface close to the light will shrink, and the wall surface far from the light will relax, so that the driving layer bends in the direction away from the display component, thereby increasing the distance between the lens corresponding to the pixel area and the pixel area, that is, increasing the focal length of the lens, and finally making the display plane and the focal plane not on the same plane, effectively avoiding the convergence adjustment conflict. Similarly, when 2D display is required, it is only necessary to turn off the light source. At this time, the driving layer will return to a flat state, that is, the display plane and the focal plane are on the same plane. In summary, the above-mentioned structure can be used to make different pixel areas displayed on different focal planes, and realize the arbitrary switching of the focal length in the near and far views of the image, so that the human eye can see different depth of field images, and finally realize the 3D light field display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0047] Figure 1 is a schematic diagram of a display component in the present invention;

[0048] Figure 2 yes Figure 1 A partial enlarged view of the

[0049] Figure 3 One of the embodiments is shown Figure 2 A cross-sectional view along the 1-1 direction;

[0050] Figure 4 Another embodiment shows Figure 2 A cross-sectional view along the 1-1 direction;

[0051] Figure 5 Yet another embodiment shows Figure 2 A cross-sectional view along the 1-1 direction;

[0052] Figure 6 yes Figure 3 A method for preparing a 3D display device is shown in;

[0053] Figure 7 It is a structural schematic diagram of the back plate in the present invention;

[0054] Figure 8 yes Figure 5 A method for preparing a 3D display device is shown in;

[0055] Fig. 9 It is a schematic diagram of the deformation of the driving layer;

[0056] Fig.10 is a light path diagram of the 3D light field display device of the present invention;

[0057] Fig.11 It is a graph of the relationship between the light intensity and the curvature radius of the driving layer;

[0058] Fig.12 is a pixel circuit diagram of the present invention;

[0059] Fig.13 It is a timing control diagram of the light source in the present invention.

[0060] In the figure: 1. substrate; 2. light-emitting layer; 3. display component; 4. sub-pixel; 5. light source; 6. backplane; 7. driving layer; 8. lens; 9. micro-nano structure; 10. fixed layer; 11. anchor layer; 12. support layer; 13. packaging cover; 14. polysilicon layer; 15. first inorganic layer; 16. gate insulating layer; 17. second inorganic layer; 18. mons tube; 19. backplane insulating layer; 20. organic layer; 21. anode; 22. backplane limiting layer; 23. cathode ray tube. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0063] The microlens 8 array is an important micro-optical component for realizing 3D light field display, and has many unique optical properties. By adjusting parameters such as shape, focal length, arrangement, and duty cycle, the microlens 8 array can realize specific functions for imaging. Most of the light field displays on the market currently use basic 3D display technology, such as using a cylindrical lens 8 grating to project light from different pixels into the eyes in different directions to achieve a 3D light field display effect.

[0064] The above technology has the defect that the focal length of lens 8 is fixed on the same focal plane and cannot be adjusted as needed, that is, the depth is simulated on the fixed focal plane to create a stereoscopic visual sense. This presentation method is a depth perception formed by binocular parallax, and does not support the dynamic focus adjustment of both eyes. Although the binocular parallax is changing, the focus remains unchanged, so it cannot achieve the synchronous adjustment of viewing the real world, which makes it easy to have convergence adjustment conflicts, showing dizziness, nausea and other phenomena; and the display viewpoint image resolution and the number of viewpoints of this technology are affected by the grating size of cylindrical lens 8. The larger the grating size, the fewer viewpoints, which will cause discontinuity of viewpoints; the smaller the size, the more viewpoints, and the lower the resolution. Therefore, variable focal length microlens 8 technology is needed to solve this problem and achieve a more natural 3D display viewing effect.

[0065] The specific structure of the 3D display device is described below with reference to the accompanying drawings:

[0066] In order to solve the technical problem that the focal length of the lens 8 cannot be adjusted in the prior art, Figure 1-Figure 13 As shown, the present application provides a 3D display device, including:

[0067] Display component 3, such as Figure 1 and Figure 2 As shown, a light source 5 is provided in the area surrounded by every three sub-pixels 4 in the display component 3. Preferably, the light source 5 is equidistant from the three sub-pixels 4. The wavelength of the light emitted by the light source 5 is different from the wavelength of the light emitted by the sub-pixels 4. Exemplarily, the light source 5 can be ultraviolet visible light of 405-455nm.

[0068] A back plate 6, wherein the back plate 6 is arranged on the light emitting surface of the display component 3;

[0069] A plurality of driving layers 7, wherein the plurality of driving layers 7 are made of photodeformable materials, and the plurality of driving layers 7 are arranged outside the encapsulation layer of the backplane 6, at positions corresponding to the plurality of sub-pixels 4 one by one; specifically, the thickness of the driving layer 7 is 2 mm; and photodeformable materials with different molecular design structures can be selected. More specifically, the photodeformable material utilizes the structural change of the photosensitive group inside the polymer to induce the bending deformation of the film material. For example, when the photodeformable material is set as a polymer molecular film containing an azobenzene structure, it can be a polyurethane copolymer containing an azodiphenylethene group or a copolymer of a derivative containing a benzospiropyran group and PMMA; since the azobenzene structure polymer is a cis-trans isomer and has photoisomerization, when it receives light, only the surface structure absorbs light to shrink or relax. Specifically, when it receives 405-455nm ultraviolet visible light irradiation, the molecular chain length shortens to shrink, and when it receives 577n When the ultraviolet visible light of m is irradiated, the length of the molecular chain becomes longer and stretched. The sensitive wavelength of different polymer materials can be determined by molecular design. The material's deformation variable can be up to 400%. Of course, it is not limited to the coordination of the above wavelengths, but can also be coordinated with visible light and invisible light. Specifically, the azobenzene structure polymer will shrink when it receives visible light and relax when it receives invisible light. The specific design is pre-designed according to needs; and when the photodeformable material is set to a polymer molecular film containing a benzospiropyran structure, the molecular polarity increases when it receives ultraviolet visible light, thereby causing the polymer molecular film to relax; the above two embodiments are only shown for the convenience of understanding the scheme. The specific selection of photodeformable materials is not limited in this embodiment. As long as the material does not deform when the sub-pixel 4 is illuminated, and can be bent and deformed along the vertical direction when illuminated by the light source 5, it is suitable for this scheme and belongs to the protection scope of this scheme.

[0070] and a microlens 8 array, wherein the plurality of lenses 8 in the microlens 8 array are correspondingly mounted on the plurality of driving layers 7, and finally sealed by a packaging cover plate 13; preferably, the area of ​​the lens 8 is slightly larger than the light-emitting area of ​​the sub-pixel 4 area;

[0071] After receiving the light emitted by the light source 5 , the driving layer 7 will bend and deform along the vertical direction to change the distance between the lens 8 and the display component 3 .

[0072] When 3D display is required, it is only necessary to turn on the light source 5. At this time, after the driving layer 7 receives the light from the light source 5, Fig. 9As shown in the figure, the wall surface close to the light will shrink, and the wall surface far from the light will relax, so that the driving layer 7 bends in the direction away from the display component 3, thereby increasing the distance between the lens 8 corresponding to the pixel area and the pixel area, that is, it is possible to change the exit position of the light emitted by each sub-pixel 4, that is, to increase the focal length of the lens 8, and finally make the display plane and the focal plane not on the same plane, effectively avoiding the convergence adjustment conflict. Similarly, when 2D display is required, it is only necessary to turn off the light source 5. At this time, the driving layer 7 will be restored to a flat state, that is, the display plane and the focal plane are on the same plane; or The source 5 is switched so that the wall surface close to the light is relaxed and the wall surface far from the light is contracted, so that the driving layer 7 moves toward the display component 3, thereby accelerating the speed at which the driving layer 7 becomes flat; in summary, the above-mentioned structure is adopted to make different pixel areas displayed on different focal planes, and the focal length can be switched arbitrarily between the near view and the far view of the image, so that the human eye can see images with different depths of field, and finally realize the 3D light field display effect; the process of the present invention is simple, and the microlens 8 can be integrated with the device to realize the light field display with high brightness, light weight, high resolution, low crosstalk and multiple depths of field.

[0073] In a specific embodiment, Figure 4 As shown, the driving layer 7, the lens 8 and the sub-pixel 4 are in one-to-one correspondence, wherein, in order to facilitate the bending deformation of the driving layer 7 along the vertical direction, preferably, the size of the driving layer 7 is slightly larger than the size of the lens 8; further, in order to increase the bending deformation range of the driving layer 7, preferably, as Figure 3 As shown, one end of the driving layer 7 away from the lens 8 intersects at a position corresponding to the light source 5 .

[0074] Specifically, Fig.10 As shown, the light emitted by each pixel on the display component 3 enters the human eye after being transmitted through the corresponding lens 8, where the human eye is equivalent to the lens 8. After being projected by the human eye, the light is projected onto the retina to form an image, and the above-mentioned image is a real image; then the light emitted by the pixel changes its optical path after passing through the microlens 8, and converges in the opposite direction at one point, which is equivalent to the light emitted from this point. This point is a virtual image A, where the plane where A is located is the focal plane, that is, in the prior art, the display plane where A is located and the focal plane are always on the same plane, and cannot be adjusted as needed, that is, the depth is simulated on a fixed focal plane to create a stereoscopic visual sense. This presentation method is the depth perception formed by binocular parallax, and does not support the dynamic focus adjustment of both eyes. Although the binocular parallax is changing, the focus remains unchanged, so it cannot achieve the synchronous adjustment of viewing the real world, which makes it easy to have convergence adjustment conflicts, showing dizziness, nausea and other phenomena;

[0075] In response to the above technical problems, the present application proposes that a light source 5 is provided in the area surrounded by every three sub-pixels 4 in the display component 3, and a driving layer 7 made of a photodeformable material is added between the lens 8 and the packaging layer of the back panel 6, so as to adjust the focal length of each lens 8 in the microlens 8 array, so that the display plane and the focal plane of the lens 8 corresponding to each sub-pixel 4 are not on the same plane, so as to realize the arbitrary switching of the focal length between the near and far views of the image, so that the human eye can see images with different depths of field, and finally realize the 3D light field display effect.

[0076] Specifically, when 3D display is required, it is only necessary to turn on the light source 5. At this time, after the driving layer 7 receives the light from the light source 5, as shown in FIG. Fig. 9 As shown in FIG. 1 , the wall surface close to the light will shrink, and the wall surface away from the light will relax, so that the driving layer 7 bends in the direction away from the display component 3, thereby increasing the distance between the lens 8 corresponding to the pixel area and the sub-pixel 4. Therefore, the light emitted by the sub-pixel 4 will be refracted by the lens 8 and will converge in the opposite direction to A", from Fig.10 It can be seen from the figure that the plane where A" is located is not on the same plane as the plane where A is located, thereby realizing the focal length adjustment of a single lens 8. Of course, the focal lengths of multiple lenses 8 can also be adjusted as needed. The specific adjustment process is the same as the above steps, so it will not be described in detail here. In summary, after the driving layer 7 receives the light from the light source 5, as shown in FIG. Fig. 9 As shown, the wall surface close to the light will shrink, and the wall surface far from the light will relax, so that the driving layer 7 bends in the direction away from the display component 3, that is, the emission position of the light emitted by each sub-pixel 4 can be changed, so as to output a light field image and realize the arbitrary switching of the focal length between the near and far views of the image, so that the human eye can see images with different depths of field.

[0077] According to an embodiment of the present invention, in order to limit the position of the driving layer 7 in the horizontal direction so that it can only bend and deform along the vertical direction, as shown in FIG. Figure 3 As shown, a fixing layer 10 is further provided at the intersection of the plurality of driving layers 7, for fixing one end of the plurality of driving layers 7; specifically, when the driving layer 7 receives the light emitted by the light source 5, the wall surface close to the light will shrink to bend and deform along the vertical direction. During this process, since one end of the driving layer 7 has been fixed by the fixing layer 10, the driving layer 7 will not be able to move in the horizontal direction at this time and can only bend and deform in the vertical direction, thereby improving the accuracy of focal length adjustment; in addition, the fixing layer 10 in this embodiment can also be used as a supporting material, so that space for the lens 8 to move is left between the packaging cover plate 13 and the back plate 6.

[0078] According to one embodiment of the present invention, in order to facilitate the preparation of the fixed layer 10 at the intersection of multiple driving layers 7, as shown in FIG. Figure 3 As shown, an anchor layer 11 is provided at a position on the encapsulation layer corresponding to the light source 5 as a reference point, and the fixing layer 10 is provided on the anchor layer 11; preferably, the anchor layer 11 can be made of an opaque material, so that the light source 5 can be shielded, thereby preventing the light emitted by the light source 5 from affecting the display of the 3D display device.

[0079] According to an embodiment of the present invention, in order to improve the light extraction efficiency of the light source 5 and thereby increase the bending deformation of the driving layer 7, as shown in FIG. Figure 5 As shown, a micro-nano structure 9 is provided between each of the driving layers 7 and the encapsulation layer, and the micro-nano structure 9 is composed of a plurality of periodically arranged gratings; specifically, the period of the gratings within a pixel unit is consistent; of course, the micro-nano structure 9 is not limited to the grating design, and structures such as pits or protrusions can also be used, which are not specifically limited in this embodiment.

[0080] According to an embodiment of the present invention, in order to further reduce the horizontal movement of the driving layer 7 when it is bent and deformed in the vertical direction, as shown in FIG. Figure 4 and Figure 5 As shown, a hydrophobic layer is provided in the gap between each two adjacent gratings.

[0081] On the basis of the above embodiment, in order to ensure the best light extraction efficiency of the light source 5, preferably, the size of the gap (grating constant d) between each two adjacent micro-nano gratings is as follows:

[0082]

[0083] in,

[0084]

[0085] Wherein, θ is the incident angle of the light beam; β is the diffraction angle of the light beam passing through the grating; d is the gap between each two adjacent micro-nano gratings, λ is the diffraction wavelength; neff is the effective refractive index; ε i is the dielectric constant; h i is the grating thickness.

[0086] Specifically, the above formula can be used to design different grating constants according to needs, thereby improving the light extraction efficiency of a certain monochromatic light passing through the grating; illustratively, when the light source 5 is set to 405-455nm ultraviolet visible light, in order to ensure that it has the best light extraction efficiency, the wavelength value is substituted into the above formula to determine the range value of the gap (grating constant d) between each two adjacent micro-nano gratings. As long as the gap between each two adjacent nano gratings in the 3D display device is set according to the above range value, the light extraction efficiency of the light source 5 can be guaranteed to be at the optimal value.

[0087] In a specific embodiment, the pixels of the display component 3 adopt a mirror design, referring to the Diamond pixel arrangement, the product size is 6.9", the resolution is 1440x3088, and the pixel size is 51.4*51.4um; the distance between the microlens 8 array and the light-emitting layer 2 in the display component 3 is 15.6um, and the thickness of the encapsulation layer is 13um; the thickness of the driving layer 7 is 2um, and the driving layer 7 is made of an azobenzene polymer, specifically a polyurethane copolymer containing an azodiphenylethene group or a copolymer of a derivative containing a benzospiropyran group and PMMA. Since the azobenzene structure polymer is a cis-trans isomer and has photoisomerization, when it receives light, only the surface structure absorbs light to shrink or relax. Specifically, when it receives 405-455nm ultraviolet visible light irradiation, the molecular chain length shortens to shrink, and when it receives 577nm light irradiation, the molecular chain length lengthens to stretch. The photosensitive wavelength of different polymer materials can be determined by molecular design, and the type variable of the material can be as high as 400%.

[0088] Among them, the focal length of the lens 8 has the following relationship with the arch height H and the aperture D, according to:

[0089]

[0090] Through the above formula, when two variables D&H are determined in the design, the focal length can be calculated according to the design value, thereby determining the placement height of the lens 8 to the pixel area; wherein, the material of the lens 8 selects high-thickness materials such as EPG590 and TMR-TS01E. Specifically, different materials need to maintain the morphology of the lens 8, and the aperture: arch height, i.e., D:H, is different. For example, the limit maintained by EPG590 is D:H=11.8, and the arc morphology is no longer maintained if this value is exceeded.

[0091] The formula for the bending deformation of the driving layer 7 is:

[0092]

[0093] Where:

[0094] h is the material thickness;

[0095] K is the ratio constant of even single molecules undergoing isomerization reaction to the total photosensitivity;

[0096] τct is the characteristic time;

[0097] η is the absorption transition constant of light;

[0098] d is the light attenuation distance;

[0099] t is the illumination time;

[0100] I0 is the light intensity;

[0101] z is the distance from the light source 5 to the wall surface of the driving layer 7 that is illuminated.

[0102] In summary, after the photodeformable material of the driving layer 7 is selected, the deformation of the driving layer 7 can be directly calculated by the above formula and added to the original focal length of the lens 8 to calculate the focal length of the lens 8 .

[0103] like Fig.11 As shown, when only the light intensity is a single variable, the curvature radius of the driving layer 7 corresponding to the current light intensity, that is, the bending deformation of the driving layer 7, can be determined by looking up a table.

[0104] Furthermore, in order to avoid the light source 5 interfering with the display effect when the display component 3 is displaying, thereby causing the problem of cross-color, it is preferred that Fig.12 and Fig.13 As shown, the control IC adjusts the Data timing to control the light source 5 and RGB to light up non-simultaneously. For example, when RGB is lit in the first frame, the Data signal of RGB is in normal timing. At this time, the Data signal of the light source 5 is pulled up to 4.6V in the T2 stage, and the light source 5 is in the off state. On the contrary, when RGB is turned off, the light source 5 emits light. At the same time, during the light-emitting stage of the light source 5, the voltage of the Data signal is pulled up (darkened) or lowered (brightened) (2-4.6V) to control the light intensity of the light source 5, thereby controlling the bending degree of the photosensitive material. Specifically, as shown in the above formula It is shown that when the brightness of the light source 5 is increased, the corresponding bending deformation of the driving layer 7 is increased, the distance between the lens 8 and RGB will become larger, and the displayed image moves away from the display component 3 compared to the normal display imaging position, thereby further increasing the focal length of the lens 8; of course, in this embodiment, it is not limited to adjusting the brightness of the light source 5 to change the bending deformation of the driving layer 7, thereby adjusting the distance between the lens 8 and the light source 5, and then adjusting the focal length of the lens 8. Referring to the above formula, the bending deformation of the driving layer 7 can also be adjusted by the illumination time and other parameters to control the depth of field.

[0105] To achieve the above object, the second aspect of the present invention provides a method for preparing a 3D display device. In one embodiment, as Figure 6 and Figure 7 As shown, the method includes:

[0106] A display assembly 3 provided with a plurality of light sources 5 is prepared;

[0107] The specific steps include:

[0108] Prepare a substrate 1;

[0109] According to an embodiment of the present invention, a light source 5 is provided in a region surrounded by every three sub-pixels 4 in the light-emitting layer 2 , wherein the wavelength of the light source 5 is different from that of the sub-pixel 4 .

[0110] Prepare a back plate 6, and install the back plate 6 on the light emitting surface of the display component 3;

[0111] Specific as Figure 7 As shown, the film layer structure includes from bottom to top: polysilicon layer 14 (P-Si) → first inorganic layer 15 (GI) → gate insulating layer 16 (Gate) → second inorganic layer 17 (ILD) → mons tube 18 (SD) → backplane insulating layer 19 (PVX) → organic layer 20 (PLN) → anode 21 (AND) → backplane 6 limiting layer (PDL) → light-emitting layer 2 (EL) → cathode ray tube 23 (cathode).

[0112] Among them, the specific bonding processes of the above-mentioned film layers are all existing technologies, so they will not be described in detail here.

[0113] like Figure 6 a, coating a layer of silica gel layer, and patterning an anchor layer 11 at a position corresponding to the light source 5 on the encapsulation layer;

[0114] Specifically, a resin layer is coated on the surface of the encapsulation layer of the back plate 6 , and is patterned to form the anchor layer 11 at a position corresponding to the light source 5 through exposure and development.

[0115] like Figure 6 b. Coat a layer of photodeformable material and pattern the drive layer 7 corresponding to the multiple sub-pixels 4 one by one.

[0116] Specifically, a layer of photodeformable material is coated, and a driving layer 7 corresponding to each sub-pixel 4 is formed by patterning through a mask and etching.

[0117] like Figure 6 c. preparing an array of microlenses 8 on the plurality of driving layers 7;

[0118] Specifically, the microlens 8 array is prepared by thermal reflow or printing technology, so that the multiple lenses 8 in the microlens 8 array correspond to the multiple driving layers 7 one by one.

[0119] like Figure 6 d. Coating a resin layer and patterning to form a fixing layer 10 corresponding to the anchor layer 11 .

[0120] Specifically, a resin layer is coated, and the fixing layer 10 is patterned on the anchor layer 11 through exposure and development to fix the multiple driving layers 7 and serve as a supporting structure.

[0121] like Figure 6 e. Coat a layer of adhesive and form a support layer 12 by patterning, install a packaging cover plate 13 on the support layer 12, and perform edge packaging.

[0122] In another embodiment, Figure 7 and Figure 8 As shown, the method includes:

[0123] A display assembly 3 provided with a plurality of light sources 5 is prepared;

[0124] The specific steps include:

[0125] Prepare a substrate 1;

[0126] According to an embodiment of the present invention, a light source 5 is provided in a region surrounded by every three sub-pixels 4 in the light-emitting layer 2 , wherein the wavelength of the light source 5 is different from that of the sub-pixel 4 .

[0127] Prepare a back plate 6, and install the back plate 6 on the light emitting surface of the display component 3;

[0128] Specific as Figure 7 As shown, the film layer structure includes from bottom to top: polysilicon layer 14 (P-Si) → first inorganic layer 15 (GI) → gate insulating layer 16 (Gate) → second inorganic layer 17 (ILD) → mons tube 18 (SD) → backplane insulating layer 19 (PVX) → organic layer 20 (PLN) → anode 21 (AND) → backplane defining layer 22 (PDL) → light-emitting layer 2 (EL) → cathode ray tube 23 (cathode).

[0129] Among them, the specific bonding processes of the above-mentioned film layers are all existing technologies, so they will not be described in detail here.

[0130] like Figure 8a. Micro-nano structures 9 are prepared at positions corresponding to each other in the encapsulation layer of the backplane 6 and the sub-pixels 4. Each micro-nano structure 9 includes a plurality of nano-gratings arranged periodically, and the spacing between every two adjacent nano-gratings is equal.

[0131] Specifically, preferably, a plurality of periodically arranged nanogratings are prepared on the packaging layer of the backplane 6 at positions corresponding to the sub-pixels 4 by nanoimprinting or EB direct writing. That is to say, a plurality of periodically arranged nanogratings are provided at positions corresponding to each sub-pixel 4, and the spacing between each two adjacent nanogratings is selected according to the range value of the optimal light output rate of the light source 5 calculated as above.

[0132] like Figure 8 b. Coating a hydrophobic layer and defining the hydrophobic layer between every two adjacent gratings by patterning.

[0133] Specifically, a hydrophobic layer is first coated on the grating, and the hydrophobic layer is patterned by exposure, development and etching to limit it between every two adjacent gratings, so as to prevent the driving layer 7 from moving in the horizontal direction when bending and deforming along the vertical direction.

[0134] like Figure 8 b, coating a layer of silica gel, and patterning the position corresponding to the light source 5 on the encapsulation layer to form an anchor layer 11;

[0135] Specifically, a resin layer is coated on the surface of the grating, and after exposure and development, it is patterned at the intersection of the gratings, that is, the intersection of multiple driving layers 7 is patterned to form the anchor layer 11.

[0136] like Figure 8 c. Coat a layer of photodeformable material and pattern the drive layer 7 corresponding to the multiple sub-pixels 4 one by one.

[0137] Specifically, a layer of photodeformable material is coated, and a mask plate and an etching method are combined to form a pattern to form a driving layer 7 having the same molding area as the micro-nano structure 9 .

[0138] like Figure 8 d. preparing an array of microlenses 8 on the plurality of driving layers 7;

[0139] Specifically, the microlens 8 array is prepared by thermal reflow or printing technology, so that the multiple lenses 8 in the microlens 8 array correspond to the multiple driving layers 7 one by one.

[0140] like Figure 8 e. Coating a resin layer and patterning to form a fixing layer 10 corresponding to the anchor layer 11.

[0141] Specifically, a resin layer is coated, and the fixing layer 10 is patterned on the anchor layer 11 through exposure and development to fix the multiple driving layers 7 and serve as a supporting structure.

[0142] like Figure 8 f. Coat a layer of adhesive and form a support layer 12 by patterning, install a packaging cover plate 13 on the support layer 12, and perform edge packaging to ensure space for multiple lenses 8 to move up and down.

[0143] Each embodiment in this specification is described in a progressive manner, and some embodiments focus on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0144] It should be noted that, in the specification and claims of the present application and the above-mentioned drawings, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or specific order or precedence between these entities or operations. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0145] Moreover, the terms "comprises," "comprising," and "having," and any variations thereof or any other variants thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus. For example, a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0146] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0147] The above description is only a specific implementation mode of the present application, so that those skilled in the art can understand or implement the present application. It will be obvious to those skilled in the art that various modifications and variations to these embodiments, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A 3D display device, characterized in that: include: A display component, wherein a light source is provided in an area surrounded by three sub-pixels in the display component, and the wavelength of light emitted by the light source is different from the wavelength of light emitted by the three sub-pixels; A back plate, the back plate being arranged on the light emitting surface of the display assembly; A plurality of driving layers, wherein the plurality of driving layers are made of a photodeformable material, and the plurality of driving layers are arranged outside the encapsulation layer of the backplane, at positions corresponding to the plurality of sub-pixels one by one; and a microlens array, wherein a plurality of lenses in the microlens array are correspondingly mounted on a plurality of the driving layers; After receiving the light emitted by the light source, the driving layer will bend and deform along the vertical direction to change the distance between the lens and the display component.

2. The 3D display device according to claim 1, characterized in that: A micro-nano structure is provided between each of the driving layers and the packaging layer, and the micro-nano structure is composed of a plurality of periodically arranged micro-nano gratings.

3. The 3D display device according to claim 2, characterized in that: A hydrophobic layer is arranged in the gap between every two adjacent gratings.

4. The 3D display device according to claim 2, characterized in that: The gap size between each two adjacent micro-nano gratings is as follows: Wherein, d is the gap between each two adjacent micro-nano gratings, λ is the diffraction wavelength; neff is the effective refractive index; ε i is the dielectric constant; h i is the grating thickness.

5. The 3D display device according to claim 1, characterized in that: A fixing layer is also provided at the intersection of the plurality of driving layers, for fixing one end of the plurality of driving layers.

6. The 3D display device according to claim 5, characterized in that: An anchor layer is provided at a position on the encapsulation layer corresponding to the light source, and the fixing layer is arranged on the anchor layer.

7. A method for preparing a 3D display device, characterized in that: For preparing a 3D display device according to any one of claims 1 to 6, the method comprising: Prepare a display assembly provided with a plurality of light sources; Prepare a back plate, and install the back plate on the light emitting surface of the display assembly; A plurality of driving layers corresponding to the sub-pixels are prepared by using photodeformable materials; Preparing a microlens array on a plurality of the driving layers; Applying a layer of adhesive material and forming a support layer by patterning; The packaging cover plate is mounted on the support layer and edge packaging is performed.

8. The method for preparing a 3D display device according to claim 7, characterized in that: The steps of preparing a display component provided with a plurality of light sources specifically include: Prepare a substrate; A light-emitting layer is prepared on the substrate, and a light source is provided in an area surrounded by every three sub-pixels in the light-emitting layer, wherein the wavelength of the light source is different from that of the sub-pixel.

9. The method for preparing a 3D display device according to claim 7, characterized in that: The step of using the photodeformable material to prepare a plurality of driving layers corresponding to the sub-pixels one by one specifically includes: A layer of photodeformable material is coated and patterned to form a driving layer corresponding to a plurality of sub-pixels.

10. The method for manufacturing a 3D display device according to claim 7, characterized in that: The step of using the photodeformable material to prepare a plurality of driving layers corresponding to the sub-pixels one by one specifically includes: Micro-nano structures are prepared at positions of the encapsulation layer of the backplane corresponding to the sub-pixels one by one; A layer of photodeformable material is coated and patterned to form a driving layer corresponding to the plurality of micro-nano structures.

11. The method for preparing a 3D display device according to claim 10, characterized in that: After the micro-nano structures are prepared at positions of the encapsulation layer of the backplane corresponding to the sub-pixels one by one, the method further includes: A hydrophobic layer is coated, and the hydrophobic layer is defined between every two adjacent gratings by patterning.

12. The method for manufacturing a 3D display device according to claim 10, characterized in that: The step of using the photodeformable material to prepare a plurality of driving layers corresponding to the sub-pixels one by one specifically includes: Coating a layer of silica gel, and patterning a position on the encapsulation layer corresponding to the light source to form an anchor layer; Coating a layer of photodeformable material and patterning to form a driving layer corresponding to a plurality of sub-pixels; A resin layer is coated and patterned to form a fixing layer corresponding to the anchor point layer.

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