CN113870731A - 2D3D switchable Micro-LED naked eye display device - Google Patents
2D3D switchable Micro-LED naked eye display device Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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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
- 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
- G02B30/28—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 involving active lenticular arrays
Abstract
The invention provides a 2D3D switchable Micro-LED naked eye display device, wherein pixel point units on a display surface of the display device are arranged in M rows by N lines, each pixel point unit comprises N RGB pixel assemblies, M RGB pixel assemblies are 2D display pixels, and N-M RGB pixel assemblies are 3D display pixels; a lens array is arranged on the display surface of the display device; the lens array is aligned with the 3D display pixels, and provides a naked eye 3D display effect by refracting the display light of the 3D display pixels in a required direction; the display device comprises a driving module capable of controlling the working condition of each RGB pixel assembly; when the driving module enables the 2D display pixels to be in a display state and the 3D display pixels to be in a non-display state, the display surface works in a 2D display mode; when the driving module enables the 3D display pixels to be in a display state and the 2D display pixels to be in a non-display state, the display surface works in a 3D display mode; the invention combines the Micro-LED display screen and the lens technology, and can realize 2D display and naked eye 3D display.
Description
Technical Field
The invention relates to the field of photoelectric display, in particular to a 2D3D switchable Micro-LED naked eye display device.
Background
With the popularization of various wireless products and intelligent devices, people have increasingly strong demand for diversification of information presentation modes. How to achieve better display in small-sized devices becomes a problem to be solved in a great number of application fields. In this case, the micro display technology is in progress. In recent years, with the increasing progress of LED chip process technology, LED Micro-display technology with Micro-LEDs as pixels has become possible. The Micro-LED carries out high-density arrangement, microminiaturization, integration and array on the LED structure design, the volume of the Micro-LED is about 1% of the size of the current mainstream LED, and each pixel is controlled to independently emit light through a driving circuit. Compared with an LCD (liquid crystal display), the Micro-LED has the advantages of self luminescence, low power consumption, high brightness, ultrahigh contrast, high reaction speed, super electricity saving and longer service life. Compared with the OLED which is also self-luminous, the brightness is 30 times higher, the resolution can reach 1500PPI, the power consumption is only 50% of that of the OLED, and the service life is longer.
In order to meet the more intuitive and real viewing experience of people, the 3D display technology is widely concerned and researched. Compared with the traditional two-dimensional display, the 3D display can provide depth information of objects, and more truly restores the stereoscopic attributes of the objects in reality. Parallax barrier display, lenticular lens display, and the like can make people observe a 3D image by using the binocular parallax effect of human eyes. Aiming at the defects of the prior art and the advantages that the liquid crystal Micro-lens array or the Micro-lens array can realize 3D display, the invention provides a 2D/3D switchable Micro-LED naked eye display device.
Disclosure of Invention
The invention provides a 2D3D switchable Micro-LED naked eye display device, which combines the advantages of low power consumption, high resolution and high pixel point arrangement density of a Micro-LED display screen, and simultaneously realizes 2D display and naked eye 3D display by utilizing the characteristics of zoom adjustability of a liquid crystal lens or fixed focal length of a solid lens.
The invention adopts the following technical scheme.
A2D 3D switchable Micro-LED naked eye display device is characterized in that pixel units on a display surface of the display device are arranged in M rows by N lines, each pixel unit comprises N RGB pixel assemblies, M RGB pixel assemblies are 2D display pixels, and N-M RGB pixel assemblies are 3D display pixels; a lens array is arranged on the display surface of the display device; the lens array is aligned with the 3D display pixels, and provides a naked eye 3D display effect by refracting the display light of the 3D display pixels in a required direction; the display device comprises a driving module capable of controlling the working condition of each RGB pixel assembly; when the driving module enables the 2D display pixels to be in a display state and the 3D display pixels to be in a non-display state, the display surface works in a 2D display mode; when the driving module enables the 3D display pixels to be in a display state and the 2D display pixels to be in a non-display state, the display surface works in a 3D display mode.
The lens array is a liquid crystal micro lens array or a solid micro lens array; the n RGB pixel assemblies in each pixel unit comprise red sub-pixels, green sub-pixels and blue sub-pixels.
The liquid crystal micro-lens array comprises an upper substrate, a patterned electrode, a high-resistance layer, an upper dielectric layer, a liquid crystal layer, an isolator, a lower dielectric layer, a planar electrode and a lower substrate from top to bottom;
the preparation method of the liquid crystal micro-lens array comprises the following steps;
step S1: the preparation of the patterned electrode specifically comprises the following steps:
s11, selecting the first substrate as an upper substrate, and then manufacturing a patterned electrode comprising p rows and q columns on the surface of the first substrate by adopting a photoetching technology;
s12, spin-coating a layer of transparent material on the surface of the patterned electrode prepared in the step S11 by using a spin coater, forming an orientation layer film after high-temperature roasting, and forming an upper dielectric layer through rubbing orientation;
step S2: preparing a planar electrode: selecting a second substrate as a lower substrate, scribing, cleaning and drying the lower substrate, and manufacturing a planar electrode; preparing a layer of transparent material on one surface of the planar electrode by adopting a spin coating process, forming an orientation layer film after high-temperature roasting, and rubbing the orientation layer film along the opposite direction of the upper dielectric layer to form a lower dielectric layer;
step S3: the preparation of the liquid crystal lens specifically comprises the following steps:
s31, manufacturing a transparent spacer with the thickness of 40-100 mu m on the surface of the upper dielectric layer of the patterned electrode by adopting powder spraying equipment, coating frame sealing glue on the periphery of the second orientation layer of the planar electrode by adopting a printing or ink-jet printing process, and reserving a crystal filling opening on the periphery of the frame sealing glue; the thickness of the frame sealing glue is 3-5 times of that of the insulator;
s32, aligning the patterned electrode layer and the planar electrode layer in opposite directions according to the upper dielectric layer and the lower dielectric layer, and forming a frame sealing body after the frame sealing glue is melted;
s33, filling liquid crystal molecules into the sealing frame body along the crystal filling opening in the step S31 by using crystal filling equipment, and then sealing the crystal filling opening, wherein the liquid crystal molecules form a liquid crystal layer between the patterned electrode layer and the planar electrode layer;
and S34, after the liquid crystal is poured in the step S33, curing glue is coated on the liquid crystal filling opening, and the liquid crystal box which can be used as a liquid crystal micro-lens array is obtained after ultraviolet exposure and sealing.
The patterned electrode and the surface electrode are Indium Tin Oxide (ITO) transparent conductive electrodes; the material adopted by the high-impedance layer is one or more of transparent oxide and transparent high polymer material;
the upper dielectric layer and the lower dielectric layer are orientation layers of liquid crystal molecules of the liquid crystal layer, and the orientations of the two orientation layers are anti-parallel to each other; the material adopted by the orientation layer is one or more of polyimide, polymethylphenylsilane, polyester fiber, polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethylene 4-methyl cinnamic acid and polyethylene cinnamic acid, and the orientation mode is one of friction orientation and light-induced orientation;
the liquid crystal material adopted by the liquid crystal layer is one of nematic liquid crystal, polymer liquid crystal or blue phase liquid crystal.
The solid-state micro-lens array is prepared by adopting a photoresist melting, laser etching, screen printing or ink-jet printing process.
The lens array is composed of micro lens units; the shape of the micro lens unit in the top view direction is circular or regular polygon, and the size of the micro lens unit is related to the number of RGB pixel assemblies required to be covered by the micro lens unit.
The diameter of the circular micro-lens unit is between 10 mu m and 100 mu m; the size range of the adjacent microlens units is between 5 [ mu ] m and 10 [ mu ] m.
Each RGB pixel assembly is formed by a micro LED device; the number of micro LED devices at the display surface is M columns × N rows × N.
The Micro LED device is a blue light Micro-LED and comprises a first metal electrode, a current diffusion layer, p-GaN, an active layer, n-GaN, a DBR distributed Bragg reflection grating and a second metal electrode;
the first metal electrode and the second metal electrode are made of one of Ni/Au and Ti/Au metal alloy; the current diffusion layer is made of Indium Tin Oxide (ITO); the active layer is an InGaN/GaN multi-quantum well; the DBR consists of low-reflectivity layers and high-reflectivity layers which are alternately formed, the optical thickness of each layer of material is 1/4 of the wavelength of emitted light, and the components of the DBR are materials which have lattice constants matched with a GaN substrate and do not absorb blue light.
The display device is a Micro-LED display screen which can be directionally addressed and independently driven to light each RGB pixel assembly on the display surface; when the driving mode of the display device is switched off, the pixels of the Micro-LED display screen are combined to work, and the display mode of the Micro-LED display screen is 2D display; when the driving mode of the display device is switched on, M multiplied by N multiplied by (N-M) pixels on the Micro-LED display screen work in a combined mode so that a 3D image is displayed on the Micro-LED display screen, the 3D image is respectively refracted to two eyes of a viewer by the lens array according to double light paths so as to realize the naked eye 3D display effect in the eyes of the viewer, and the display mode of the Micro-LED display screen is switched to 3D display;
when the lens array is a liquid crystal micro lens array; the Micro-LED display screen changes the distribution area of the watching position of the naked eye 3D display effect by changing the focal length of the Micro lens unit.
The invention has the following remarkable advantages: the Micro-LED naked eye display device combines the characteristics of high-density arrangement, microminiaturization, integration, arraying, self-luminescence, low power consumption and high resolution of a Micro-LED display screen, divides pixel points on the Micro-LED display screen into different pixel units, wherein one part of the pixel units is used for 2D display, the other part of the pixel units is used for 3D display, pixel combination directional addressing can be regulated and controlled through a driving module, and independent driving and lighting are realized, so that the free switching of a 2D/3D mode can be realized.
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The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of a single pixel cell in the present invention;
FIG. 2 is a schematic diagram of the distribution of pixel units at the display surface;
FIG. 3 is a schematic diagram illustrating switching between a 2D display mode and a 3D display mode according to the present invention;
FIG. 4 is a schematic cross-sectional view of a pixel cell of the present invention at a distribution area of a display surface;
FIG. 5 is a schematic diagram of the lens array and the 3D display pixels of the display surface when the lens array is a solid state microlens array;
FIG. 6 is a schematic cross-sectional view of a liquid crystal microlens array when the lens array is closed;
FIG. 7 is a schematic cross-sectional view of a liquid crystal microlens array when the lens array is active;
in the figure: a 10-2D display pixel; 11-red subpixel; 12-green subpixel; 13-blue subpixel; 20-3D display pixels; 30-pixel point units; 40-preparing a substrate of the solid microlens array; 50-a lens array; 60-Micro-LED display screen; 70-preparing a substrate of the liquid crystal micro-lens array; 80-a patterned electrode; 90-high resistance layer; 100-an upper dielectric layer; 110-a liquid crystal layer; 120-an insulator; 130-lower dielectric layer.
Detailed Description
As shown in the figure, in a 2D3D switchable Micro-LED naked-eye display device, pixel units 30 on a display surface of the display device are arranged in M rows × N lines, each pixel unit includes N RGB pixel assemblies, and M of the RGB pixel assemblies are 2D display pixels 10, and N-M of the RGB pixel assemblies are 3D display pixels 20; a lens array is arranged on the display surface of the display device; the lens array is aligned with the 3D display pixels, and provides a naked eye 3D display effect by refracting the display light of the 3D display pixels in a required direction; the display device comprises a driving module capable of controlling the working condition of each RGB pixel assembly; when the driving module enables the 2D display pixels to be in a display state and the 3D display pixels to be in a non-display state, the display surface works in a 2D display mode; when the driving module enables the 3D display pixels to be in a display state and the 2D display pixels to be in a non-display state, the display surface works in a 3D display mode.
The lens array is a liquid crystal micro lens array or a solid micro lens array; the n RGB pixel assemblies in each pixel unit include a red subpixel 11, a green subpixel 12, and a blue subpixel 13.
The liquid crystal micro-lens array comprises an upper substrate, a patterned electrode 80, a high-resistance layer 90, an upper dielectric layer 100, a liquid crystal layer 110, an insulator 120, a lower dielectric layer 130, a planar electrode and a lower substrate from top to bottom;
the preparation method of the liquid crystal micro-lens array comprises the following steps;
step S1: the preparation of the patterned electrode specifically comprises the following steps:
s11, selecting the first substrate as an upper substrate, and then manufacturing a patterned electrode comprising p rows and q columns on the surface of the first substrate by adopting a photoetching technology;
s12, spin-coating a layer of transparent material on the surface of the patterned electrode prepared in the step S11 by using a spin coater, forming an orientation layer film after high-temperature roasting, and forming an upper dielectric layer through rubbing orientation;
step S2: preparing a planar electrode: selecting a second substrate as a lower substrate, scribing, cleaning and drying the lower substrate, and manufacturing a planar electrode; preparing a layer of transparent material on one surface of the planar electrode by adopting a spin coating process, forming an orientation layer film after high-temperature roasting, and rubbing the orientation layer film along the opposite direction of the upper dielectric layer to form a lower dielectric layer;
step S3: the preparation of the liquid crystal lens specifically comprises the following steps:
s31, manufacturing a transparent spacer with the thickness of 40-100 mu m on the surface of the upper dielectric layer of the patterned electrode by adopting powder spraying equipment, coating frame sealing glue on the periphery of the second orientation layer of the planar electrode by adopting a printing or ink-jet printing process, and reserving a crystal filling opening on the periphery of the frame sealing glue; the thickness of the frame sealing glue is 3-5 times of that of the insulator;
s32, aligning the patterned electrode layer and the planar electrode layer in opposite directions according to the upper dielectric layer and the lower dielectric layer, and forming a frame sealing body after the frame sealing glue is melted;
s33, filling liquid crystal molecules into the sealing frame body along the crystal filling opening in the step S31 by using crystal filling equipment, and then sealing the crystal filling opening, wherein the liquid crystal molecules form a liquid crystal layer between the patterned electrode layer and the planar electrode layer;
and S34, after the liquid crystal is poured in the step S33, curing glue is coated on the liquid crystal filling opening, and the liquid crystal box which can be used as a liquid crystal micro-lens array is obtained after ultraviolet exposure and sealing.
The patterned electrode and the surface electrode are Indium Tin Oxide (ITO) transparent conductive electrodes; the material adopted by the high-impedance layer is one or more of transparent oxide and transparent high polymer material;
the upper dielectric layer and the lower dielectric layer are orientation layers of liquid crystal molecules of the liquid crystal layer, and the orientations of the two orientation layers are anti-parallel to each other; the material adopted by the orientation layer is one or more of polyimide, polymethylphenylsilane, polyester fiber, polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethylene 4-methyl cinnamic acid and polyethylene cinnamic acid, and the orientation mode is one of friction orientation and light-induced orientation;
the liquid crystal material adopted by the liquid crystal layer is one of nematic liquid crystal, polymer liquid crystal or blue phase liquid crystal.
The solid-state micro-lens array is prepared by adopting a photoresist melting, laser etching, screen printing or ink-jet printing process.
The lens array is composed of micro lens units; the shape of the micro lens unit in the top view direction is circular or regular polygon, and the size of the micro lens unit is related to the number of RGB pixel assemblies required to be covered by the micro lens unit.
The diameter of the circular micro-lens unit is between 10 mu m and 100 mu m; the size range of the adjacent microlens units is between 5 [ mu ] m and 10 [ mu ] m.
Each RGB pixel assembly is formed by a micro LED device; the number of micro LED devices at the display surface is M columns × N rows × N.
The Micro LED device is a blue light Micro-LED and comprises a first metal electrode, a current diffusion layer, p-GaN, an active layer, n-GaN, a DBR distributed Bragg reflection grating and a second metal electrode;
the first metal electrode and the second metal electrode are made of one of Ni/Au and Ti/Au metal alloy; the current diffusion layer is made of Indium Tin Oxide (ITO); the active layer is an InGaN/GaN multi-quantum well; the DBR consists of low-reflectivity layers and high-reflectivity layers which are alternately formed, the optical thickness of each layer of material is 1/4 of the wavelength of emitted light, and the components of the DBR are materials which have lattice constants matched with a GaN substrate and do not absorb blue light.
The display device is a Micro-LED display screen 60 which can be directionally addressed and independently driven to light each RGB pixel assembly on the display surface; when the driving mode of the display device is switched off, the pixels of the Micro-LED display screen are combined to work, and the display mode of the Micro-LED display screen is 2D display; when the driving mode of the display device is switched on, M multiplied by N multiplied by (N-M) pixels on the Micro-LED display screen work in a combined mode so that a 3D image is displayed on the Micro-LED display screen, the 3D image is respectively refracted to two eyes of a viewer by the lens array according to double light paths so as to realize the naked eye 3D display effect in the eyes of the viewer, and the display mode of the Micro-LED display screen is switched to 3D display;
when the lens array is a liquid crystal micro lens array; the Micro-LED display screen changes the distribution area of the watching position of the naked eye 3D display effect by changing the focal length of the Micro lens unit.
The first embodiment is as follows:
in this example, the microlens array is a solid state microlens array, the position of the microlens array is aligned with n-m pixel points on the active drive Micro-LED display screen, as shown in fig. 5, and 3D display is realized under the drive module.
Example two:
in this example, the microlens array is a liquid crystal microlens array, and the position of the liquid crystal microlens array is aligned with n-m pixel points on the active drive Micro-LED display screen, as shown in fig. 6 and 7.
The pixel combination on the Micro-LED display screen can be directionally addressed and independently driven to be lightened, and when no voltage is applied to a driving mode and a liquid crystal box, the pixel combination with the number of M multiplied by N multiplied by M on the Micro-LED display screen works, as shown in FIG. 6, 2D display is realized; when a voltage is applied to the driving mode and the liquid crystal box, M multiplied by N multiplied by (N-M) pixels on the Micro-LED display screen work in a combined mode, 3D display is achieved through the liquid crystal Micro-lens array and Micro unit images on the Micro-LED display screen, and further the Micro-LED naked eye display device with the 2D/3D mode capable of being freely switched is achieved.
The above-mentioned preferred embodiments, further explaining the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned are only preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A2D 3D switchable Micro-LED naked eye display device is characterized in that: the pixel units of the display surface of the display device are arranged according to M rows multiplied by N lines, each pixel unit comprises N RGB pixel assemblies, M RGB pixel assemblies are 2D display pixels, and N-M RGB pixel assemblies are 3D display pixels; a lens array is arranged on the display surface of the display device; the lens array is aligned with the 3D display pixels, and provides a naked eye 3D display effect by refracting the display light of the 3D display pixels in a required direction; the display device comprises a driving module capable of controlling the working condition of each RGB pixel assembly; when the driving module enables the 2D display pixels to be in a display state and the 3D display pixels to be in a non-display state, the display surface works in a 2D display mode; when the driving module enables the 3D display pixels to be in a display state and the 2D display pixels to be in a non-display state, the display surface works in a 3D display mode.
2. A2D 3D switchable Micro-LED naked eye display device according to claim 1, wherein: the lens array is a liquid crystal micro lens array or a solid micro lens array; the n RGB pixel assemblies in each pixel unit comprise red sub-pixels, green sub-pixels and blue sub-pixels.
3. A2D 3D switchable Micro-LED naked eye display device according to claim 2, wherein: the liquid crystal micro-lens array comprises an upper substrate, a patterned electrode, a high-resistance layer, an upper dielectric layer, a liquid crystal layer, an isolator, a lower dielectric layer, a planar electrode and a lower substrate from top to bottom;
the preparation method of the liquid crystal micro-lens array comprises the following steps;
step S1: the preparation of the patterned electrode specifically comprises the following steps:
s11, selecting the first substrate as an upper substrate, and then manufacturing a patterned electrode comprising p rows and q columns on the surface of the first substrate by adopting a photoetching technology;
s12, spin-coating a layer of transparent material on the surface of the patterned electrode prepared in the step S11 by using a spin coater, forming an orientation layer film after high-temperature roasting, and forming an upper dielectric layer through rubbing orientation;
step S2: preparing a planar electrode: selecting a second substrate as a lower substrate, scribing, cleaning and drying the lower substrate, and manufacturing a planar electrode; preparing a layer of transparent material on one surface of the planar electrode by adopting a spin coating process, forming an orientation layer film after high-temperature roasting, and rubbing the orientation layer film along the opposite direction of the upper dielectric layer to form a lower dielectric layer;
step S3: the preparation of the liquid crystal lens specifically comprises the following steps:
s31, manufacturing a transparent spacer with the thickness of 40-100 mu m on the surface of the upper dielectric layer of the patterned electrode by adopting powder spraying equipment, coating frame sealing glue on the periphery of the second orientation layer of the planar electrode by adopting a printing or ink-jet printing process, and reserving a crystal filling opening on the periphery of the frame sealing glue; the thickness of the frame sealing glue is 3-5 times of that of the insulator;
s32, aligning the patterned electrode layer and the planar electrode layer in opposite directions according to the upper dielectric layer and the lower dielectric layer, and forming a frame sealing body after the frame sealing glue is melted;
s33, filling liquid crystal molecules into the sealing frame body along the crystal filling opening in the step S31 by using crystal filling equipment, and then sealing the crystal filling opening, wherein the liquid crystal molecules form a liquid crystal layer between the patterned electrode layer and the planar electrode layer;
and S34, after the liquid crystal is poured in the step S33, curing glue is coated on the liquid crystal filling opening, and the liquid crystal box which can be used as a liquid crystal micro-lens array is obtained after ultraviolet exposure and sealing.
4. A2D 3D switchable Micro-LED naked eye display device according to claim 3, wherein: the patterned electrode and the surface electrode are Indium Tin Oxide (ITO) transparent conductive electrodes; the material adopted by the high-impedance layer is one or more of transparent oxide and transparent high polymer material;
the upper dielectric layer and the lower dielectric layer are orientation layers of liquid crystal molecules of the liquid crystal layer, and the orientations of the two orientation layers are anti-parallel to each other; the material adopted by the orientation layer is one or more of polyimide, polymethylphenylsilane, polyester fiber, polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethylene 4-methyl cinnamic acid and polyethylene cinnamic acid, and the orientation mode is one of friction orientation and light-induced orientation;
the liquid crystal material adopted by the liquid crystal layer is one of nematic liquid crystal, polymer liquid crystal or blue phase liquid crystal.
5. A2D 3D switchable Micro-LED naked eye display device according to claim 2, wherein: the solid-state micro-lens array is prepared by adopting a photoresist melting, laser etching, screen printing or ink-jet printing process.
6. A2D 3D switchable Micro-LED naked eye display device according to claim 2, wherein: the lens array is composed of micro lens units; the shape of the micro lens unit in the top view direction is circular or regular polygon, and the size of the micro lens unit is related to the number of RGB pixel assemblies required to be covered by the micro lens unit.
7. A2D 3D switchable Micro-LED naked eye display device according to claim 6, wherein: the diameter of the circular micro-lens unit is between 10 mu m and 100 mu m; the size range of the adjacent microlens units is between 5 [ mu ] m and 10 [ mu ] m.
8. A2D 3D switchable Micro-LED naked eye display device according to claim 1, wherein: each RGB pixel assembly is formed by a micro LED device; the number of micro LED devices at the display surface is M columns × N rows × N.
9. The Micro LED device is a blue light Micro-LED and comprises a first metal electrode, a current diffusion layer, p-GaN, an active layer, n-GaN, a DBR distributed Bragg reflection grating and a second metal electrode;
the first metal electrode and the second metal electrode are made of one of Ni/Au and Ti/Au metal alloy; the current diffusion layer is made of Indium Tin Oxide (ITO); the active layer is an InGaN/GaN multi-quantum well; the DBR consists of low-reflectivity layers and high-reflectivity layers which are alternately formed, the optical thickness of each layer of material is 1/4 of the wavelength of emitted light, and the components of the DBR are materials which have lattice constants matched with a GaN substrate and do not absorb blue light.
10. A2D 3D switchable Micro-LED naked eye display device according to claim 1, wherein: the display device is a Micro-LED display screen which can be directionally addressed and independently driven to light each RGB pixel assembly on the display surface; when the driving mode of the display device is switched off, the pixels of the Micro-LED display screen are combined to work, and the display mode of the Micro-LED display screen is 2D display; when the driving mode of the display device is switched on, the pixels of the Micro-LED display screen with the number of M multiplied by N multiplied by (N-M) work in a combined mode so that a 3D image is displayed on the Micro-LED display screen, the lens array refracts the 3D image to two eyes of a viewer according to double light paths respectively so as to achieve a naked eye 3D display effect in the eyes of the viewer, and the display mode of the Micro-LED display screen is switched to 3D display.
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| CN114755842A (en) * | 2022-04-06 | 2022-07-15 | 南方科技大学 | Naked eye 3D display device and method based on reconstructed light field |
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| CN113219561A (en) * | 2021-04-13 | 2021-08-06 | 福州大学 | Large-field-depth composite micro lens and manufacturing method thereof |
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| CN114755842A (en) * | 2022-04-06 | 2022-07-15 | 南方科技大学 | Naked eye 3D display device and method based on reconstructed light field |
| CN114755842B (en) * | 2022-04-06 | 2024-04-02 | 南方科技大学 | Naked eye 3D display device and method based on reconstructed light field |
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