An integrated imaging multi-mode adjustable viewing angle display method and system based on liquid crystal lenses

Abstract

This invention discloses an integrated imaging multi-mode adjustable viewing angle display method and system based on liquid crystal lenses, relating to the field of integrated imaging. The method includes: first, acquiring a first image captured by an image acquisition module, and identifying the total area of ​​the audience in the first image; then, in response to the total area of ​​the audience in the first image being concentrated in the narrow viewing angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state of the lens array, controlling the lens array to be in the second low stereoscopic viewing angle state and switching the corresponding source resolution of the 2D display array; conversely, controlling the lens array to be in the first high stereoscopic viewing angle state and switching the corresponding source resolution of the 2D display array. This invention, by obtaining the total area of ​​the audience and controlling the stereoscopic viewing angle state of the lens array and switching the source resolution of the 2D display array according to the total area of ​​the audience, effectively saves viewing angle requirements under low viewing angle requirements and improves stereoscopic display resolution.

Description

Technical Field

[0001] This invention relates to the field of 3D display, and in particular to an integrated imaging multi-mode adjustable viewing angle display method and system based on liquid crystal lenses. Background Technology

[0002] Integrated imaging is an automated stereoscopic and multi-view 3D imaging technology. Its core feature lies in using a two-dimensional microlens array (also known as a fly-eye lens) to capture and reproduce the light field. This technology eliminates the need for large integrated objectives or observation lenses. Instead, it uses the microlens array to record and reproduce light from different angles, thereby creating a 3D visual effect containing depth information. Specifically, integrated imaging technology includes two main processes: recording and reproduction. During recording, the microlens array records information about the object's spatial scene onto film. Each microlens captures a portion of the scene information from a different direction, generating tiny images (i.e., image pixels) from different perspectives. During reproduction, using the same microlens array as during recording, the light from the image pixels is focused and restored through the principle of optical reversibility, reproducing a 3D image of the object's spatial scene.

[0003] In existing technologies, the viewing angle of integrated imaging 3D displays is fixed, which often results in a decrease in display resolution in order to meet the requirements of a wide viewing angle. When the 3D viewing angle of the source material itself is small, the fixed integrated imaging viewing angle cannot contain the loss of resolution, resulting in a double loss of viewing angle and resolution, and it is impossible to switch the source material resolution according to the specific situation of the viewing user. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an integrated imaging multi-mode adjustable viewing angle display system based on liquid crystal lenses. The aim is to achieve lens aperture switching of the liquid crystal lenses by setting driving electrodes on each liquid crystal lens, with one side serving as a driving motor and the other side serving as a common electrode. Based on this, the liquid crystal lens array provided by the present invention can switch between different viewing angle modes and be compatible with different viewing angles. For example, for a source material with N*N integrated imaging 3D pixels, a lens corresponding to low viewing angle and high resolution can be used for integrated imaging, while for a source material with 2N*2N integrated imaging 3D pixels, a lens corresponding to high viewing angle and low resolution can be used for integrated imaging, thus achieving a coordinated matching of viewing angle and resolution.

[0005] To achieve the above objectives, in a first aspect of the present invention, an integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens is provided, the system comprising:

[0006] 2D display array;

[0007] A lens array is disposed on the 2D display array; the lens array includes a lens group unit; the lens group unit includes a first electrode group located on a first substrate, a second electrode group located on a second substrate, and a liquid crystal layer disposed between the first electrode group and the second electrode group; the first electrode group and the second electrode group are in a one-to-one correspondence; the second electrode group includes M groups of second electrode subgroups; wherein, in a first high stereoscopic viewing angle state, the first electrode group is subjected to a corresponding first driving voltage, and the second electrode subgroups are subjected to a common potential voltage, and the lens group unit as a whole behaves as one lens; in a second low stereoscopic viewing angle state, each second electrode subgroup in the second electrode group is subjected to a corresponding second driving voltage, and the first electrode subgroup is subjected to a common potential voltage, and the lens group unit behaves as M sublenses.

[0008] An image acquisition module is used to acquire a first image within the visible area of ​​the display system; the first image contains at least one viewer.

[0009] Main controller; the main controller is configured as follows:

[0010] The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified.

[0011] In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched.

[0012] In one specific embodiment, the first electrode group includes a plurality of first sub-electrodes that diffuse outward from the center; the second electrode group includes M groups of second electrode sub-groups that are evenly distributed, each group of second electrode sub-groups including a plurality of second sub-electrodes that diffuse outward from the center.

[0013] In one specific embodiment, a first high-resistivity electrical connection layer is provided between each of the first sub-electrodes in the first electrode group, and a second high-resistivity electrical connection layer is provided between each of the second sub-electrodes in each of the second electrode sub-groups.

[0014] In one specific embodiment, the first electrode group includes a plurality of concentrically arranged first annular electrodes, and the second electrode subgroup includes a plurality of concentrically arranged second annular electrodes.

[0015] In one specific embodiment, a third electrode is further disposed in the peripheral region of the first electrode group within the lens group unit, and a fourth electrode is further disposed between the second electrode groups and in the peripheral region within the lens group unit; in the first high stereoscopic viewing angle state, the fourth electrode is applied with a second same potential; in the second low stereoscopic viewing angle state, the third electrode is applied with a first same potential.

[0016] In one specific embodiment, in the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:N. 2 N is a positive integer; the second electrode subgroup is arranged in a horizontal and vertical array.

[0017] In one specific embodiment, in the first high stereoscopic viewing angle state, each of the second sub-electrodes in the second electrode sub-group is applied a driving voltage with a gradient increase or a gradient decrease that diffuses from the center to the periphery; in the second low stereoscopic viewing angle state, each of the first sub-electrodes in the first electrode group is applied a driving voltage with a gradient increase or a gradient decrease that diffuses from the center to the periphery.

[0018] In one specific embodiment, the first electrode group is arranged in a strip-shaped or annular arrangement; the second electrode subgroup is arranged in a strip-shaped or annular arrangement; wherein the annular arrangement includes circular rings and polygonal rings.

[0019] In one specific embodiment, in the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:L, and the second electrode subgroup is arranged in a circular pattern.

[0020] In a second aspect of the present invention, an integrated imaging multi-mode viewing angle adjustable display method based on a liquid crystal lens is provided. The method is applied to an integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens as described in any specific embodiment of the first aspect above. The method includes:

[0021] The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified.

[0022] In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched.

[0023] The beneficial effects of the present invention are as follows: (1) In the present invention, the total audience area is obtained. When the total audience area is concentrated in the narrow-view stereoscopic display viewing area, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; conversely, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched, and the 2D display source resolution is switched. Based on this, the viewing angle requirement under low viewing angle requirement is effectively saved, and the stereoscopic display resolution is improved. (2) In the first high stereoscopic viewing angle state, each of the first sub-electrodes in each of the first electrode groups is given a corresponding driving voltage, and each of the second sub-electrodes in each of the second electrode sub-groups is given a second same potential, so that the lens group unit as a whole behaves as 1 lens; in the second low stereoscopic viewing angle state, each of the first sub-electrodes in each of the first electrode groups is given a first same potential so that the first electrode group is used as a common electrode, and each of the second sub-electrodes in each of the second electrode sub-groups is given a corresponding driving voltage, so that the lens group unit behaves as M sub-lenses. Based on this, two lens modes can be switched, two 3D resolutions are compatible, and 2D resolution loss is avoided under low-viewing-angle 3D display requirements. 3) In this invention, a first high-resistivity connection layer is provided between the first sub-electrodes, and a first high-resistivity connection layer is provided between each first sub-electrode in the first electrode group. In this way, when the first electrode group or the second electrode group serves as a common electrode, the potential of the area between the electrodes can be guaranteed to be the common electrode potential, thereby balancing the common electrode of the entire area and avoiding local distortion of the liquid crystal lens. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating an integrated imaging multi-mode adjustable viewing angle display method based on a liquid crystal lens according to a specific embodiment of the present invention.

[0025] Figure 2 This is a side view schematic diagram of the lens group unit of an integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens according to a specific embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the side view structure of the sub-lens of the lens group unit in a first high stereoscopic viewing angle state according to a specific embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the side view structure of the sub-lens of the lens group unit in a second low stereoscopic viewing state according to a specific embodiment of the present invention.

[0028] Figure 5 This is a top view schematic diagram of the sub-electrode of the lens group unit in a specific embodiment of the present invention;

[0029] Figure 6 This is a side view structural diagram of a lens group unit with three viewing angles according to a specific embodiment of the present invention. Detailed Implementation

[0030] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0031] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0032] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0033] like Figures 1-6 As shown, this embodiment of the invention provides an integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens, the system comprising:

[0034] 2D display array;

[0035] A lens array is disposed on the 2D display array; the lens array includes: a lens group unit; the lens group unit includes: a first electrode group located on a first substrate, a second electrode group located on a second substrate, and a liquid crystal layer disposed between the first electrode group and the second electrode group; the first electrode group and the second electrode group are in a one-to-one correspondence; the second electrode group includes M groups of second electrode subgroups; wherein, in a first high stereoscopic viewing angle state, the first electrode group is applied with a corresponding first driving voltage, and the second electrode subgroups are applied with a common potential voltage, and the lens group unit as a whole behaves as one lens; in a second low stereoscopic viewing angle state, each second electrode subgroup in the second electrode group is applied with a corresponding second driving voltage, and the first electrode subgroup is applied with a common potential voltage, and the lens group unit behaves as M sublenses; Figure 3 As shown, in the first high stereoscopic viewing angle state, the lens group unit as a whole behaves as a single lens; as Figure 4 As shown, in the second low stereoscopic viewing angle, the lens group unit appears as two lenses; it is worth mentioning that, Figure 3 , Figure 4 In the diagram, the liquid crystal deflection is illustrative and only serves to illustrate the number of sub-lenses. The actual deflection shall prevail.

[0036] It is worth mentioning that for a single lens group unit, there is one lens in the first high stereoscopic viewing angle state and M sub-lenses in the second low stereoscopic viewing angle state; correspondingly, the stereoscopic display viewing angle is wider in the first high viewing angle state than in the second low viewing angle state, but the stereoscopic resolution is worse.

[0037] An image acquisition module is used to acquire a first image within the visible area of ​​the display system; the first image contains at least one viewer.

[0038] Main controller; the main controller is configured as follows:

[0039] The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified.

[0040] In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched.

[0041] In this invention, the relevant electrode driving of the liquid crystal lens can be achieved using existing technology; one example is given below for illustrative purposes. Other driving electrodes and driving methods can be set in other ways. The driving electrodes are on the same side of the liquid crystal cell and contain positive and negative voltages. The liquid crystal is deflected under the action of the voltage to realize the lens; or the driving electrodes can be on both sides of the liquid crystal cell and the liquid crystal of the liquid crystal cell can be controlled to realize the lens.

[0042] In this embodiment, the first electrode group includes a plurality of first sub-electrodes that diffuse outward from the center; the second electrode group includes M groups of second electrode sub-groups that are evenly distributed, and each group of second electrode sub-groups includes a plurality of second sub-electrodes that diffuse outward from the center.

[0043] Typically, the simplest lens can be implemented using three first sub-electrodes, and the second electrode subgroup can also be implemented using three second sub-electrodes; while to obtain better lens confocalization, a greater number of electrodes can be used for driving.

[0044] Furthermore, a first high-resistance electrical connection layer is provided between each of the first sub-electrodes in the first electrode group, and a second high-resistance electrical connection layer is provided between each of the second sub-electrodes in each of the second electrode sub-groups.

[0045] Preferably, the first electrode group includes a plurality of concentrically arranged first annular electrodes, and the second electrode subgroup includes a plurality of concentrically arranged second annular electrodes.

[0046] Furthermore, in this embodiment, a third electrode is provided in the peripheral region of the first electrode group within the lens group unit, and a fourth electrode is provided between the second electrode groups and in the peripheral region within the lens group unit; in the first high stereoscopic viewing angle state, the fourth electrode is applied with a second same potential; in the second low stereoscopic viewing angle state, the third electrode is applied with a first same potential.

[0047] In this invention, the ratio of the first electrode group to the second electrode subgroup is not limited. In one feasible embodiment, in the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:N. 2 N is a positive integer; the second electrode subgroup is arranged in a horizontal and vertical array.

[0048] In a preferred driving method of this embodiment, in the first high stereoscopic viewing angle state, each of the second sub-electrodes in the second electrode sub-group is applied a driving voltage with a gradient increase or a gradient decrease that diffuses from the center to the periphery; in the second low stereoscopic viewing angle state, each of the first sub-electrodes in the first electrode group is applied a driving voltage with a gradient increase or a gradient decrease that diffuses from the center to the periphery.

[0049] Furthermore, the first electrode group can be arranged in a strip or a ring; the second electrode subgroup can be arranged in a strip or a ring; wherein the ring arrangement includes circular rings and polygonal rings.

[0050] In this invention, the ratio of the first electrode group to the second electrode subgroup is not limited. In one feasible example, in the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:L, and the second electrode subgroup is arranged in a circular pattern.

[0051] Furthermore, in the above example, the viewing angle module is dual-mode, but in reality, it can be further multi-mode; for example, the first electrode group is set on the A side of the liquid crystal cell, and the second electrode group is set on the B side of the liquid crystal cell, thus realizing dual-mode viewing angle switchability; based on this, the 2*2 area of ​​the A side is taken as a lens group unit, and the B side is set as a common electrode to realize the third mode viewing angle, thereby realizing the overall three-mode viewing angle integrated imaging, and the module can be further upgraded. Figure 6 As shown, integrated imaging with three-mode perspectives is achieved.

[0052] like Figure 1 As shown, in a second aspect of the present invention, an integrated imaging multi-mode viewing angle adjustable display method based on a liquid crystal lens is provided. The method is applied to an integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens provided in the first embodiment. The method includes:

[0053] The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified.

[0054] In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched.

[0055] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens, characterized in that, The system includes: 2D display array; A lens array is disposed on the 2D display array; the lens array includes a lens group unit; the lens group unit includes a first electrode group located on a first substrate, a second electrode group located on a second substrate, and a liquid crystal layer disposed between the first electrode group and the second electrode group; the first electrode group and the second electrode group are in a one-to-one correspondence; the second electrode group includes M groups of second electrode subgroups; wherein, in a first high stereoscopic viewing angle state, the first electrode group is applied with a corresponding first driving voltage, and the second electrode subgroups are applied with a common potential voltage, and the lens group unit as a whole behaves as one lens; in a second low stereoscopic viewing angle state, each second electrode subgroup in the second electrode group is applied with a corresponding second driving voltage, and the first electrode group is applied with a common potential voltage, and the lens group unit behaves as M sublenses. An image acquisition module is used to acquire a first image within the visible area of ​​the display system; the first image contains at least one viewer. Main controller; the main controller is configured as follows: The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified. In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched. The first electrode group includes a plurality of first sub-electrodes that diffuse outward from the center; the second electrode group includes M groups of second electrode sub-groups that are evenly distributed, each group of second electrode sub-groups including a plurality of second sub-electrodes that diffuse outward from the center. A first high-resistivity connection layer is provided between each of the first sub-electrodes in the first electrode group, and a second high-resistivity connection layer is provided between each of the second sub-electrodes in each of the second electrode sub-groups. A third electrode is also provided in the peripheral region of the first electrode group within the lens group unit, and a fourth electrode is also provided between the second electrode groups and in the peripheral region within the lens group unit; in the first high stereoscopic viewing angle state, the fourth electrode is applied with a second same potential; in the second low stereoscopic viewing angle state, the third electrode is applied with a first same potential.

2. The integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens as described in claim 1, characterized in that, The first electrode group includes a plurality of concentrically arranged first annular electrodes, and the second electrode subgroup includes a plurality of concentrically arranged second annular electrodes.

3. The integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens as described in claim 1, characterized in that, In the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:N², where N is a positive integer; the second electrode subgroup is arranged in a horizontal and vertical array.

4. The integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens as described in claim 1, characterized in that, In the first high stereoscopic viewing angle state, each of the second sub-electrodes in the second electrode sub-group is subjected to a driving voltage that increases or decreases in gradient as it diffuses from the center to the periphery; in the second low stereoscopic viewing angle state, each of the first sub-electrodes in the first electrode group is subjected to a driving voltage that increases or decreases in gradient as it diffuses from the center to the periphery.

5. The integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens as described in claim 1, characterized in that, The first electrode group can be arranged in a strip or a ring; the second electrode subgroup can be arranged in a strip or a ring; the ring arrangement includes circular rings and polygonal rings.

6. The integrated imaging multi-mode adjustable viewing angle display system based on a liquid crystal lens as described in claim 1, characterized in that, In the lens group unit, the ratio of the first electrode group to the second electrode subgroup is 1:L, and the second electrode subgroup is arranged in a circular pattern.

7. A method for integrated imaging multi-mode adjustable viewing angle display based on liquid crystal lenses, characterized in that, The method is applied to an integrated imaging multi-mode viewing angle adjustable display system based on a liquid crystal lens as provided in any one of claims 1-6, the method comprising: The first image acquired by the image acquisition module is obtained, and the area where the total audience of the first image is located is identified. In response to the total audience area in the first image being concentrated in the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the second low stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched; in response to the total audience area in the first image being outside the narrow-angle stereoscopic display viewing area corresponding to the second low stereoscopic viewing angle state in which the lens array is operating, the lens array is controlled to be in the first high stereoscopic viewing angle state and the corresponding source resolution of the 2D display array is switched.

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