Integrated imaging light field 2D / 3D device and system based on liquid crystal lens

Abstract

The invention discloses an integrated imaging light field 2D / 3D device and system based on a liquid crystal lens, and the device comprises a liquid crystal lens array which comprises a first transparent substrate, a second transparent substrate, and a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate; the liquid crystal lens array is divided into a plurality of double-peak liquid crystal lens units arranged in an array mode, the double-peak liquid crystal lens units are provided with first transparent electrode parts in the corresponding area of the first transparent substrate, each first transparent electrode part comprises two sets of peak electrodes, and corresponding wing electrodes are arranged on the two sides of each peak electrode. A back electrode is arranged at the central position of the double-peak liquid crystal lens unit in a region corresponding to the second transparent substrate; the double-peak liquid crystal lens unit is configured in the mode that corresponding driving voltage is applied to all electrodes in the first transparent electrode part, so that corresponding liquid crystal molecules in the liquid crystal layer deflect to form two double-peak lenses facing the arc top in different directions. According to the invention, on the premise of ensuring the resolution, the range of the viewing angle is increased.

Description

Technical Field

[0001] The present invention relates to the field of integrated imaging display, and in particular to an integrated imaging light field 2D / 3D device and system based on a liquid crystal lens. Background Art

[0002] Visual information is a direct reflection of the real world, and images are the most direct way for humans to express information. Images can directly provide various information about an object, facilitating a more direct understanding of it. In recent years, with the rise of 3D films, traditional two-dimensional display technology has become insufficient to meet public demand. People are pursuing clearer, smarter, and more advanced 3D imaging display systems because they can display depth information, better reflect the shape of objects, and enhance the visual experience.

[0003] Integral imaging is a technology that captures and reproduces the light field information of a three-dimensional scene. It uses a microlens array (MLA) to record and reconstruct light from multiple perspectives. Its core concept is to simulate the human eye's binocular parallax and focusing mechanism, enabling the observer to perceive stereoscopic images without wearing special glasses. Three-dimensional integrated imaging display technology has attracted widespread attention from researchers due to its continuous parallax, lack of glasses, and complete field of view. This stereoscopic display can fully display scene information such as depth, layering, and position, and has become one of the most promising 3D display technologies.

[0004] In existing technologies, there's a conflict between the resolution and viewing angle of integrated imaging. Given a constant display array area, a larger number of lenses results in higher resolution but a smaller viewing angle. A larger lens size increases the viewing angle but reduces resolution. Therefore, achieving both resolution and viewing angle simultaneously presents a challenge. Summary of the Invention

[0005] In view of some of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide an integrated imaging light field 2D / 3D device and system based on liquid crystal lenses, aiming to expand the viewing angle while ensuring the resolution.

[0006] To achieve the above objectives, the present invention provides an integrated imaging light field 2D / 3D device based on a liquid crystal lens, the device comprising: a liquid crystal lens array, the liquid crystal lens array comprising a first transparent substrate, a second transparent substrate, and a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate; the liquid crystal lens array is divided into a plurality of bimodal liquid crystal lens units arranged in an array, the bimodal liquid crystal lens units being provided with a first transparent electrode portion in a region corresponding to the first transparent substrate, the first transparent electrode portion comprising two groups of peak electrodes, with corresponding wing electrodes disposed on both sides of the peak electrodes; and a back electrode being disposed at the center of the bimodal liquid crystal lens unit in a region corresponding to the second transparent substrate;

[0007] The dual-peak liquid crystal lens unit is configured as follows: a corresponding driving voltage is applied to each electrode in the first transparent electrode portion, and the driving voltage decreases or increases in sequence from the peak electrode to the wing electrodes on both sides, so that corresponding driving potential differences are formed between the peak electrode and the wing electrodes and the back electrode respectively. The driving potential difference causes the corresponding liquid crystal molecules in the liquid crystal layer to deflect to form a dual-peak lens with two arc tops in different directions. The dual-peak lens is a dual-viewing angle structure corresponding to two viewing areas, and the two viewing angle directions of the dual-viewing angle structure are the directions of the two peak electrodes toward the back electrode.

[0008] Optionally, a first blocking plate is provided on the light-emitting side of the first transparent substrate or the second transparent substrate, and the first blocking plate is located on the center line of the bimodal liquid crystal lens unit. The first blocking plate corresponds one-to-one to the number of columns of the liquid crystal lens array, and the length of the first blocking plate corresponds to the column length of the liquid crystal lens array. The width of the first blocking plate is determined according to the thickness of the first transparent substrate, the thickness of the liquid crystal layer, the angle between the dual viewing angle and the plane where the first transparent substrate is located, and the size of the bimodal liquid crystal lens unit; wherein, the first blocking plate is located between the user and the liquid crystal layer, and the bimodal liquid crystal lens units in the same column have the same size.

[0009] Optionally, the width of the first baffle plate satisfies:

[0010]

[0011] Wherein, a is half of the pitch of the bimodal liquid crystal lens unit, θ is the angle between the dual viewing angle and the plane where the first transparent substrate is located, h1 is the thickness of the first transparent substrate, h2 is the thickness of the liquid crystal layer, and is the width of the first barrier plate.

[0012] Optionally, the liquid crystal lens array is configured such that the array density of the bimodal liquid crystal lens unit located in the center is higher than the array density at the edge, based on the visual characteristics of the bionic human eye, which is dense in the middle and sparse in the periphery, and the size of the bimodal liquid crystal lens unit increases as the array density of the area decreases.

[0013] Optionally, the width of the first blocking plate matches the size of the corresponding bimodal liquid crystal lens unit, and both vary with the change of array density.

[0014] Optionally, a high-resistance electrical connection layer is provided between adjacent electrodes in the first transparent electrode portion.

[0015] Optionally, the center line of the arc top of the double-peak lens is the line connecting the peak electrode and the back electrode, that is, the viewing angle direction.

[0016] Optionally, the peak electrode, the wing electrode and the back electrode are all strip electrodes, and the bimodal liquid crystal lens unit correspondingly presents two arch structures.

[0017] Optionally, the peak electrode and the back electrode are point electrodes, the wing electrode is a ring electrode, and the bimodal liquid crystal lens unit correspondingly presents two dome structures.

[0018] The second aspect of the present invention discloses an integrated imaging light field 2D / 3D system based on a liquid crystal lens, comprising: the device provided in any one of the above items and a 2D display array, wherein the device is arranged on the 2D display array.

[0019] Beneficial effects of the present invention: 1. The dual-peak liquid crystal lens unit of the present invention is provided with a first transparent electrode portion in the corresponding area of ​​the first transparent substrate. The first transparent electrode portion includes two groups of peak electrodes, and corresponding wing electrodes are provided on both sides of the peak electrodes. A back electrode is provided in the center position of the dual-peak liquid crystal lens unit in the corresponding area of ​​the second transparent substrate; and a corresponding driving voltage is applied to each electrode in the first transparent electrode portion. The driving voltage decreases or increases in sequence from the peak electrode to the wing electrodes on both sides, so that a corresponding driving potential difference is formed between the peak electrode and the wing electrode and the back electrode respectively. The driving potential difference causes the corresponding liquid crystal molecules in the liquid crystal layer to deflect to form a dual-peak lens with two arc tops in different directions. The present invention forms a dual-viewing angle structure by corresponding two viewing areas through the dual-peak lens. Under the premise of ensuring the density of the number of lenses, another viewing area is added, that is, under the premise of ensuring the resolution, the width of the viewing angle is increased. 2. The present invention is provided with a first blocking plate on the light-emitting side. The first blocking plate is used to block the different peak displays from entering the non-corresponding viewing angles, thereby avoiding crosstalk between the dual-viewing angle displays of the dual-peak lens, thereby affecting the display quality. 3. The liquid crystal lens array of the present invention is configured to mimic the visual characteristics of the human eye, which exhibits dense information in the center and sparse information in the periphery. The array density of the bimodal liquid crystal lens units in the center is higher than that at the edges, and the size of the bimodal liquid crystal lens units increases as the array density in this area decreases. This structure better adapts to the visual characteristics of the human eye, which exhibits dense information in the center and sparse information in the periphery, providing users with a more comfortable viewing experience. Furthermore, this structure improves resolution in areas with dense information and increases viewing angle width in areas with sparse information, effectively balancing resolution and viewing angle width.

[0020] In summary, the present invention increases the width of viewing angle while ensuring resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic structural diagram of an integrated imaging light field 2D / 3D device based on a liquid crystal lens provided by a specific embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a bimodal liquid crystal lens unit in a working state provided by a specific embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the positional relationship between the first baffle and the bimodal liquid crystal lens unit provided in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention discloses an integrated imaging light field 2D / 3D device and system based on a liquid crystal lens. Those skilled in the art can refer to the content of this article and appropriately improve the technical details. It should be noted in particular that all similar replacements and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The device and application of the present invention have been described through preferred embodiments. Relevant personnel can obviously modify or appropriately change and combine the device and application described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0025] The applicant's research revealed that, in existing technologies, there is a conflict between the resolution and viewing angle of integrated imaging. Given a constant display array area, a greater number of lenses results in higher resolution but a smaller viewing angle. A larger lens size increases the viewing angle but reduces resolution. Therefore, achieving both resolution and viewing angle simultaneously presents a challenge.

[0026] Therefore, the embodiment of the present invention provides an integrated imaging light field 2D / 3D device based on liquid crystal lens, such as Figure 1 As shown, the device includes: a liquid crystal lens array, the liquid crystal lens array includes a first transparent substrate 101, a second transparent substrate 102, and a liquid crystal layer 103 arranged between the first transparent substrate 101 and the second transparent substrate 102; the liquid crystal lens array is divided into a plurality of bimodal liquid crystal lens units 105 arranged in an array, the bimodal liquid crystal lens unit 105 is provided with a first transparent electrode portion in a corresponding area of ​​the first transparent substrate 101, the first transparent electrode portion includes two groups of peak electrodes 106, and corresponding wing electrodes 107 are provided on both sides of the peak electrodes 106, and a back electrode 108 is provided at the center position of the bimodal liquid crystal lens unit 105 in a corresponding area of ​​the second transparent substrate 102.

[0027] The dual-peak liquid crystal lens unit 105 is configured as follows: a corresponding driving voltage is applied to each electrode in the first transparent electrode portion, and the driving voltage decreases or increases in sequence from the peak electrode 106 to the wing electrodes 107 on both sides, so that a corresponding driving potential difference is formed between the peak electrode 106 and the wing electrode 107 and the back electrode 108 respectively. The driving potential difference causes the corresponding liquid crystal molecules 104 in the liquid crystal layer 103 to deflect to form a dual-peak lens with two arc tops in different directions. The dual-peak lens is a dual-viewing angle structure corresponding to two viewing areas, and the two viewing angles of the dual-viewing angle structure are the directions of the two peak electrodes 106 toward the back electrode 108.

[0028] It should be noted that the first transparent substrate 101 and the second transparent substrate 102 can be located on the light-emitting side or the backlight side according to needs.

[0029] In this specific embodiment, Figure 1As shown, the electrode size of the first transparent electrode portion gradually decreases from the center to both sides to meet the arc top corresponding requirements of the double-peak lens.

[0030] In this embodiment, the bimodal liquid crystal lens unit 105 operates as follows: Figure 2 As shown, Figure 2 In the figure, the dotted lines represent the two viewing directions of the dual-view structure.

[0031] In a first specific embodiment, a first blocking plate is provided on the light-emitting side of the first transparent substrate 101 or the second transparent substrate 102. The first blocking plate is located on the center line of the bimodal liquid crystal lens unit 105. The first blocking plate corresponds one-to-one to the number of columns of the liquid crystal lens array. The length of the first blocking plate corresponds to the column length of the liquid crystal lens array. The width of the first blocking plate is determined according to the thickness of the first transparent substrate 101, the thickness of the liquid crystal layer 103, the angle between the dual viewing angle and the plane where the first transparent substrate 101 is located, and the size of the bimodal liquid crystal lens unit 105.

[0032] The first blocking plate is located between the user and the liquid crystal layer 103 , and the bimodal liquid crystal lens units 105 in the same row have the same size.

[0033] It should be noted that when using the bimodal liquid crystal lens unit 105 in the embodiment of the present invention, when a user is in the area corresponding to one of the two viewing angles, they will see the image corresponding to the other viewing angle, thus causing crosstalk. Therefore, the present invention uses the provision of a first blocking plate to block the user from seeing the image of the other viewing angle, thereby preventing crosstalk between the two viewing angles and thus affecting display quality.

[0034] Furthermore, in the first specific embodiment, if Figure 3 As shown, Figure 3 In the figure, 109 is a first baffle, and 110 is an arc top of a double-peak lens formed by liquid crystal; the width of the first baffle satisfies:

[0035]

[0036] in, Figure 3 In the figure, a is half of the pitch of the bimodal liquid crystal lens unit 105, θ is the angle between the dual viewing angle and the plane where the first transparent substrate 101 is located, h1 is the thickness of the first transparent substrate 101, h2 is the thickness of the liquid crystal layer 103, and b is the width of the first barrier plate.

[0037] It should be noted that the width in this embodiment can completely block the top of the arc corresponding to another viewing angle, and can also not block the top of the arc corresponding to the current viewing angle.

[0038] Furthermore, in the first embodiment, the extension lines of the corresponding viewing angles of the bimodal liquid crystal lens unit 105 do not overlap each other in the corresponding display area of ​​the 2D display array, so that the dual viewing angles corresponding to the bimodal liquid crystal lens unit 105 do not interfere with each other.

[0039] It should be noted that the double domes of the double-peak liquid crystal lens unit 105 each correspond to a display area, and the two display areas will not interfere with each other.

[0040] In this specific embodiment, the liquid crystal lens array is configured such that the array density of the bimodal liquid crystal lens unit 105 located in the center is higher than the array density at the edge, based on the visual characteristics of the bionic human eye, which has dense information in the middle and sparse information in the periphery. The size of the bimodal liquid crystal lens unit 105 increases as the array density in this area decreases.

[0041] It should be noted that the structure of this embodiment better adapts to the visual characteristics of the bionic human eye, which has dense information in the middle and sparse information in the periphery. Therefore, when performing 3D integrated imaging, it allows people to pay attention to clearer areas, highlighting the content in the clear areas, and providing users with a more comfortable viewing experience. The structure of this embodiment effectively optimizes resource allocation, so that the image clarity is high in places where the user's visual information is dense, and the image clarity decreases in places where the user's visual information is sparse. Under the premise of not affecting the user's viewing experience, computing power is saved through reasonable resource allocation. The most important point is that this embodiment improves resolution by increasing lens density in places where information is dense, and increases viewing angle width by increasing lens size in places where information is sparse, which can give a good balance between resolution and viewing angle width.

[0042] Furthermore, in this specific embodiment, when the variable density liquid crystal lens array has a corresponding first baffle, the width of the first baffle matches the size of its corresponding bimodal liquid crystal lens unit 105, and both change with the change of the array density.

[0043] In this specific embodiment, the center line of the arc top of the double-peak lens is the line connecting the peak electrode 106 and the back electrode 108, that is, the viewing angle direction.

[0044] In the second specific embodiment, the peak electrode 106 , the wing electrode 107 and the back electrode 108 are all strip-shaped electrodes, and the dual-peak liquid crystal lens unit 105 correspondingly presents two arch-shaped structures.

[0045] It should be noted that the two arch structures are arch structures obtained by parallel cutting of a cylinder from the top surface or the bottom surface.

[0046] In the third specific embodiment, the peak electrode 106 and the back electrode 108 are point electrodes, the wing electrode 107 is a ring electrode, and the dual-peak liquid crystal lens unit 105 correspondingly presents two dome structures.

[0047] It should be noted that the two dome structures are structures intercepted by a ball.

[0048] An embodiment of the present invention further provides an integrated imaging light field 2D / 3D system based on a liquid crystal lens, comprising: a device provided by any one of the above items and a 2D display array, wherein the device is arranged on the 2D display array.

[0049] In the embodiment of the present invention, the bimodal liquid crystal lens unit 105 is provided with a first transparent electrode portion in a corresponding region of the first transparent substrate 101. The first transparent electrode portion includes two sets of peak electrodes 106, with corresponding wing electrodes 107 disposed on either side of the peak electrodes 106. A back electrode 108 is disposed at the center of the bimodal liquid crystal lens unit 105 in a corresponding region of the second transparent substrate 102. A corresponding driving voltage is applied to each electrode in the first transparent electrode portion, with the driving voltage decreasing or increasing sequentially from the peak electrodes 106 to the wing electrodes 107 on either side. This creates a corresponding driving potential difference between the peak electrodes 106 and the wing electrodes 107 and the back electrodes 108, respectively. This driving potential difference deflects the corresponding liquid crystal molecules 104 in the liquid crystal layer 103, forming a bimodal lens with two differently oriented arc vertices. In the embodiment of the present invention, the bimodal lenses correspond to two viewing areas, forming a dual-viewing angle structure. This provides an additional viewing area while maintaining lens density. In other words, the viewing angle is increased while maintaining resolution.

[0050] In the embodiment of the present invention, a first blocking plate is provided on the light-emitting side. The first blocking plate is used to block different peak displays from entering non-corresponding viewing angles, thereby avoiding crosstalk between the dual viewing angle displays of the dual-peak lens, thereby affecting the display quality.

[0051] The liquid crystal lens array in this embodiment of the present invention is configured to mimic the visual characteristics of the human eye, which exhibits dense information in the center and sparse information in the periphery. The array density of the bimodal liquid crystal lens units 105 in the center is higher than that at the edges, and the size of the bimodal liquid crystal lens units 105 increases as the array density in this area decreases. This structure better adapts to the visual characteristics of the human eye, which exhibits dense information in the center and sparse information in the periphery, providing users with a more comfortable viewing experience. Furthermore, this structure improves resolution in areas with dense information and increases viewing angle width in areas with sparse information, effectively balancing resolution and viewing angle width.

[0052] In summary, the embodiments of the present invention increase the width of viewing angles while ensuring resolution.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0054] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. An integrated imaging light field 2D / 3D device based on liquid crystal lens, characterized in that: The device includes: a liquid crystal lens array, the liquid crystal lens array including a first transparent substrate, a second transparent substrate, and a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate; the liquid crystal lens array is divided into a plurality of bimodal liquid crystal lens units arranged in an array, the bimodal liquid crystal lens units having a first transparent electrode portion disposed in a region corresponding to the first transparent substrate, the first transparent electrode portion including two groups of peak electrodes, corresponding wing electrodes disposed on both sides of the peak electrodes, and a back electrode disposed in a region corresponding to the second transparent substrate at the center of the bimodal liquid crystal lens unit; The dual-peak liquid crystal lens unit is configured as follows: a corresponding driving voltage is applied to each electrode in the first transparent electrode portion, and the driving voltage decreases or increases in sequence from the peak electrode to the wing electrodes on both sides, so that corresponding driving potential differences are formed between the peak electrode and the wing electrodes and the back electrode respectively. The driving potential difference causes the corresponding liquid crystal molecules in the liquid crystal layer to deflect to form a dual-peak lens with two arc tops in different directions. The dual-peak lens is a dual-viewing angle structure corresponding to two viewing areas, and the two viewing angle directions of the dual-viewing angle structure are the directions of the two peak electrodes toward the back electrode.

2. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 1, characterized in that: A first blocking plate is provided on the light-emitting side of the first transparent substrate or the second transparent substrate, and the first blocking plate is located on the center line of the bimodal liquid crystal lens unit. The first blocking plate corresponds one-to-one to the number of columns of the liquid crystal lens array, and the length of the first blocking plate corresponds to the column length of the liquid crystal lens array. The width of the first blocking plate is determined according to the thickness of the first transparent substrate, the thickness of the liquid crystal layer, the angle between the dual viewing angle and the plane where the first transparent substrate is located, and the size of the bimodal liquid crystal lens unit; wherein, the first blocking plate is located between the user and the liquid crystal layer, and the bimodal liquid crystal lens units in the same column have the same size.

3. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 2, characterized in that: The width of the first barrier plate satisfies: Wherein, a is half of the pitch of the bimodal liquid crystal lens unit, θ is the angle between the dual viewing angle and the plane where the first transparent substrate is located, h1 is the thickness of the first transparent substrate, h2 is the thickness of the liquid crystal layer, and is the width of the first barrier plate.

4. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 2, characterized in that: The liquid crystal lens array is configured such that the array density of the bimodal liquid crystal lens units located in the center is higher than the array density at the edge, based on the visual characteristics of the bionic human eye, which has dense information in the middle and sparse information in the periphery. The size of the bimodal liquid crystal lens units increases as the array density in this area decreases.

5. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 4, characterized in that: The width of the first blocking plate matches the size of the corresponding bimodal liquid crystal lens unit, and both widths vary with the change of array density.

6. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 1, characterized in that: A high-resistance electrical connection layer is provided between adjacent electrodes in the first transparent electrode portion.

7. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 1, characterized in that: The center line of the arc top of the double-peak lens is the connecting line of the peak electrode and the back electrode, that is, the viewing angle direction.

8. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 1, characterized in that: The peak electrode, the wing electrode and the back electrode are all strip-shaped electrodes, and the double-peak liquid crystal lens unit correspondingly presents two arch structures.

9. The integrated imaging light field 2D / 3D device based on liquid crystal lens according to claim 1, characterized in that: The peak electrode and the back electrode are point electrodes, the wing electrode is a ring electrode, and the double-peak liquid crystal lens unit correspondingly presents two dome structures.

10. An integrated imaging light field 2D / 3D system based on liquid crystal lenses, characterized in that: include: The device and 2D display array provided by any one of claims 1-9, wherein the device is arranged on the 2D display array.

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