Liquid crystal optical device and electronic product

Abstract

SOLUTION: The present invention relates to the technical field of a liquid crystal optical device, especially, a liquid crystal optical device and an electronic product. The liquid crystal optical device includes a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer and a second substrate laminated in order; the second electrode layer includes an insulating layer, a first electrode structure and a second electrode structure; one of the first and second electrode structures is positioned on the surface of the insulating layer facing the liquid crystal layer; the other is positioned on the surface of the insulating layer separated from the liquid crystal layer; and the projection of the second electrode structure on a plane positioned at the first electrode structure covers the gap of the first electrode structure.EFFECT: The diffraction phenomenon of a liquid crystal optical device is effectively removable.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal optical devices, and particularly to liquid crystal optical devices and electronic products.

Background Art

[0002] In order to improve the spatial potential distribution accuracy of liquid crystal optical devices such as liquid crystal lenses and liquid crystal Fresnel lenses, the applicant has arranged electrode lines capable of generating a potential with a gradient change distribution in the liquid crystal optical device, and controls the passing position of the electrode lines in the functional region of the liquid crystal optical device, thereby accurately controlling the spatial potential distribution in the functional region of the liquid crystal optical device. However, when the above structure is adopted, the liquid crystal optical device exhibits a diffraction phenomenon that affects its optical effect, which has an adverse effect on refractive liquid crystal optical devices.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of this, embodiments of the present invention provide a liquid crystal optical device and an electronic product for solving the technical problem that a significant diffraction phenomenon appears in a conventional refractive liquid crystal optical device.

Means for Solving the Problems

[0004] To achieve the above object, a liquid crystal optical device of the present invention includes a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer, and a second substrate that are sequentially stacked. The second electrode layer includes an insulating layer, a first electrode structure, and a second electrode structure. One of the first electrode structure and the second electrode structure is located on the surface of the insulating layer facing the liquid crystal layer, and the other is located on the surface of the insulating layer away from the liquid crystal layer. The projection of the second electrode structure on the plane where the first electrode structure is located covers the gap of the first electrode structure.

Effects of the Invention

[0005] Advantageous Effects: In the liquid crystal optical device and the electronic product of the present invention, by providing two electrode structures, namely a first electrode structure and a second electrode structure, in the second electrode layer, the distribution of the spatial electric field in the liquid crystal optical device is controlled, and the two electrode structures are separated by using an insulating layer to insulate the two electrode structures from each other. The projection of the second electrode structure on the plane where the first electrode structure is located covers the gap between adjacent segments of the first electrode structure, and the projection of the first electrode structure on the plane where the second electrode structure is located covers the gap between adjacent segments of the second electrode structure, thereby effectively removing the diffraction phenomenon generated when a driving voltage is applied to only one electrode structure and significantly improving the optical effect of the liquid crystal optical device. Brief Description of the Drawings

[0006] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. All those that can be obtained based on these drawings without creative labor by those skilled in the art are within the protection scope of the present invention.

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Mode for Carrying Out the Invention

[0007] <Example 1> As shown in FIGS. 1 and 2, this example provides a liquid crystal optical device. The liquid crystal optical device in this example mainly includes a first substrate 1-1, a first electrode layer 1-2, a liquid crystal layer 1-3, a second electrode layer 1-4, and a second substrate 1-5 that are sequentially stacked.

[0008] In this example, the liquid crystal optical device may use a layered layout structure. The first substrate 1-1, the first electrode layer 1-2, the liquid crystal layer 1-3, the second electrode layer 1-4, and the second substrate 1-5 are stacked and arranged along the normal direction of each layer of the liquid crystal optical device. The first transparent substrate and the second transparent substrate may be made of a transparent material having a certain strength and rigidity, such as a glass substrate or a plastic substrate. The first substrate 1-1 can play a role in supporting the liquid crystal optical device. The first substrate 1-1 may be a carrier of the first electrode layer 1-2, and the first electrode layer 1-2 may be plated on the first substrate 1-1. The second substrate 1-5 can also play a supporting role and may further be a carrier of the second electrode layer 1-4.

[0009] The form of the third electrode structure in the first electrode layer may be provided as needed. For example, it may be provided as a planar electrode. In this way, the first electrode layer 1-2 may form an equipotential plane, or may be provided in the form of various patterned electrodes, and is not limited here.

[0010] The second electrode layer 1-4 includes an insulating layer 1-45, a first electrode structure 1-41, and a second electrode structure 1-42. One of the first electrode structure 1-41 and the second electrode structure 1-42 is located on the surface of the insulating layer 1-45 facing the liquid crystal layer 1-3, and the other is located on the surface of the insulating layer 1-45 away from the liquid crystal layer 1-3. The second electrode layer 1-4 in this embodiment uses two electrode structures provided up and down and separated by the insulating layer 1-45. Specifically, when implementing, the first electrode structure 1-41 may be provided to be located on the side of the insulating layer 1-45 facing the liquid crystal layer 1-3, and the second electrode layer 1-4 may be provided to be located on the side away from the liquid crystal layer of the insulating layer 1-45. Or the second electrode structure 1-42 may be provided to be located on the side of the insulating layer 1-45 facing the liquid crystal layer 1-3, and the first electrode layer 1-2 may be provided to be located on the side away from the liquid crystal layer of the insulating layer 1-45. Here, it is not limited.

[0011] The first electrode structure 1-41 is provided with a first driving voltage application position for receiving a first driving voltage and a second driving voltage application position for receiving a second driving voltage. The first driving voltage and the second driving voltage are different.

[0012] After applying a first driving voltage to the first driving voltage application position of the first electrode structure 1-41 and applying a second driving voltage to the second driving voltage application position of the second electrode structure 1-42, a potential with a gradient distribution can be formed in the first electrode structure 1-41. In this way, by controlling the passing position of the first electrode structure 1-41 in space, the distribution of the space potential can be controlled.

[0013] The second electrode structure 1-42 is provided with a third driving voltage application position for receiving a third driving voltage and a fourth driving voltage application position for receiving a fourth driving voltage. The third driving voltage and the fourth driving voltage are different.

[0014] After applying a third driving voltage to the third driving voltage application position of the second electrode structure 1-42 and applying a fourth driving voltage to the fourth driving voltage application position of the second electrode structure 1-42, a potential exhibiting a gradient distribution can be formed in the second electrode structure 1-42. By controlling the passing position of the second electrode structure 1-42 in space in this way, the distribution of the space potential can be controlled.

[0015] The first electrode structure 1-41 includes at least two segments, and there is a gap 1-44 between at least some adjacent segments in the first electrode structure 1-41. The second electrode structure 1-42 includes at least two segments, and there is a gap 1-44 between at least some adjacent segments in the second electrode structure 1-42. As shown in FIGS. 5, 8, and 11, all or part of the projection of the second electrode structure 1-42 on the plane where the first electrode structure 1-41 is located covers the gap 1-44 between adjacent segments of the first electrode structure 1-41, and all or part of the projection of the first electrode structure 1-41 on the plane where the second electrode structure 1-42 is located covers the gap 1-44 between adjacent segments of the second electrode structure 1-42. Full coverage means that the projection of one electrode structure completely shields the gap 1-44. In this case, the area occupied by the projection of the electrode structure may be larger than the gap 1-44 or equal to the gap 1-44. Partial coverage means that the projection of one electrode structure occupies only a part of the gap 1-44. Adjacent segments mean those belonging to different spatially adjacent parts of the same electrode structure. In order to generate a potential with a gradient distribution, in some regions of the first electrode structure 1-41, since the potentials of different parts are generally different, it is necessary to leave a gap 1-44 between adjacent segments in these regions so as not to affect each other. Similarly, there is a gap 1-44 between at least some adjacent segments in the aforementioned second electrode structure 1-42. When a driving voltage is applied to the aforementioned first electrode structure 1-41 or second electrode structure 1-42 alone, an accurate spatial potential distribution can be generated, but a diffraction phenomenon occurs. In contrast, in this embodiment, one of the first electrode structure 1-41 and the second electrode structure 1-42 covers the gap 1-44 of the other, and by applying a voltage to the two electrode structures simultaneously, the diffraction phenomenon of the liquid crystal optical device can be eliminated. The liquid crystal optical device in this embodiment includes, but is not limited to, a liquid crystal lens and a liquid crystal Fresnel lens.

[0016] The third driving voltage and the first driving voltage may be the same or different. When the third driving voltage and the first driving voltage are different, the third driving voltage may be greater than or less than the first driving voltage. The fourth driving voltage and the second driving voltage may be the same or different. When the fourth driving voltage and the second driving voltage are different, the fourth driving voltage may be greater than or less than the second driving voltage. For example, the first driving voltage may be set to 1.6 Vrms, the second driving voltage may be set to 2.5 Vrms, the third driving voltage may be set to 1.65 Vrms, and the fourth driving voltage may be set to 2.55 Vrms.

[0017] As an optional but advantageous embodiment, in this example, the projection of the first electrode structure 1-41 overlaps with the gap 1-44 between adjacent segments of the second electrode structure 1-42. By adopting the foregoing structure, not only can the diffraction phenomenon be eliminated, but also the capacitive effect between the upper and lower two electrode structures can be effectively reduced. As an optional but advantageous embodiment, in this example, the first electrode structure 1-41 extends from an end close to the center position of the second electrode layer 1-4 towards an end close to the edge position of the second electrode layer 1-4, and includes a first electrode line 1-411, one end of which is used to receive the first driving voltage and the other end of which is used to receive the second driving voltage. In this example, by extending the first electrode line 1-411 from the inside to the outside, the first electrode line 1-411 can be distributed at each radial position in the second electrode layer 1-4 from the inside to the outside, thereby generating a potential presenting a gradient distribution in the functional region of the liquid crystal optical device, and the liquid crystal material in the liquid crystal layer 1-3 can be deflected under the action of an electric field according to the shape of the first electrode line 1-411 to form a liquid crystal lens. The second electrode structure 1-42 extends from an end close to the center position of the second electrode layer 1-4 towards an end close to the edge position of the second electrode layer 1-4, and includes a second electrode line 1-421, one end of which is used to receive the third driving voltage and the other end of which is used to receive the fourth driving voltage. The second electrode structure 1-42 can not only well cover the gap 1-44 between adjacent segments of the first electrode structure 1-41, but also adopt a structure with a shape similar to that of the first electrode structure 1-41 in order to be consistent with the potential distribution generated by the first electrode structure 1-41.

[0018] As shown in FIG. 3, as a selective but advantageous embodiment, in this embodiment, the first electrode lines 1-411 each include a plurality of concentric arc portions 1-431 with different radii, which are segments of one first electrode structure 1-41. A gap 1-44 is provided between adjacent arc portions in the first electrode line 1-411, and adjacent arc portions in the first electrode line are connected via a connecting portion 1-432. As shown in FIGS. 3 and 6, the second electrode line 1-421 includes a plurality of concentric arc portions 1-431 with different radii. A gap 1-44 is provided between adjacent arc portions in the second electrode line, and each concentric arc portion 1-431 in the second electrode line 1-421 is a segment of one second electrode structure 1-42. Adjacent arc portions in the second electrode line are connected via a connecting portion 1-432. All or part of the projection of the arc portion in the first electrode structure on the plane where the second electrode structure is located covers the gap between adjacent concentric arc portions in the second electrode structure.

[0019] In this embodiment, concentric arc portions 1-431 with different radii are used to control the potential distribution at different radii of the liquid crystal lens. These concentric arc portions 1-431 are connected via a connecting portion 1-432. After applying the first driving voltage and the second driving voltage to two driving voltage application positions of the first electrode line 1-411 respectively, an accurate parabolic potential distribution can be formed, and a high-precision liquid crystal lens can be obtained. As shown in FIGS. 4 and 7, the concentric arc portions 1-431 of the second electrode line 1-421 cover the gap 1-44 between the concentric arc portions 1-431 connected via the first electrode line 1-411, and in this way, the diffraction phenomenon generated by the gap 1-44 between the concentric arc portions 1-431 can be effectively removed.

[0020] When specifically implementing, the electrode wire structure of the concentric arc portion 1-431 shown in FIGS. 3 and 4 may be used, or the electrode wire structure of the concentric arc portion 1-431 shown in FIGS. 6 and 7 may be used. In FIGS. 6 and 7, an electrode lead for applying a driving voltage to the first electrode wire 1-411 and the second electrode wire 1-421 is introduced to the central position of the second electrode layer 1-4, and the connecting portion 1-432 connecting between adjacent concentric arc portions 1-431 is located on one side of the electrode lead and does not cross the electrode lead.

[0021] As shown in FIG. 9, as a selective but advantageous embodiment, in this embodiment, the first electrode structure 1-41 includes a first potential distribution line 1-412 and a plurality of third electrode wires 1-413 that are respectively segments of the first electrode structure. The first driving voltage application position and the second driving voltage application position are provided on the first potential distribution line 1-412. One end of the third electrode wire 1-413 is connected to the first potential distribution line 1-412, and the opposite other end floats in the air.

[0022] After applying the first driving voltage and the second driving voltage to the first driving voltage application position and the second driving voltage application position of the first potential distribution line 1-412 respectively, and having a certain voltage difference between the first driving voltage and the second driving voltage, the potential between the two driving voltage application positions of the first potential distribution line 1-412 exhibits a gradient distribution, and different positions on the first potential distribution line 1-412 have different potentials.

[0023] The third electrode line 1-413 is in a linear shape, and all of the plurality of third electrode lines 1-413 are parallel to the first direction. The connection position between the third electrode line 1-413 and the first potential distribution line 1-412 is between the first driving voltage application position and the second driving voltage application position, and the connection positions between different third electrode lines 1-413 and the first potential distribution line 1-412 are different. Since the first potential distribution line 1-412 has a certain resistance, there is a voltage drop on the potential distribution line. Because the resistance magnitudes between the connection position of each third electrode line 1-413 and the first potential distribution line 1-412 and the first driving voltage application position are different, the potential magnitudes at the connection positions of each third electrode line 1-413 and the first potential distribution line 1-412 are also different. By controlling the connection position between the third electrode line 1-413 and the first potential distribution line 1-412 and the position where the third electrode line 1-413 passes through, the potential distribution of the liquid crystal optical device can be controlled.

[0024] As shown in FIG. 10, the second electrode structure 1-42 includes a second potential distribution line 1-422 and a plurality of fourth electrode lines 1-423. The fourth electrode line 1-423 is in a linear shape, and each fourth electrode line is a segment of the second electrode structure. All of the plurality of fourth electrode lines 1-423 are parallel to the first direction. The third driving voltage application position and the fourth driving voltage application position are provided on the second potential distribution line 1-422. One end of the fourth electrode line 1-423 is connected to the first potential distribution line 1-412, and the opposite end floats in the air.

[0025] The connection position between the fourth electrode line 1-423 and the second potential distribution line 1-422 is between the third driving voltage application position and the fourth driving voltage application position, and different connection positions between different fourth electrode lines 1-423 and the second potential distribution line 1-422 are different. After applying the third driving voltage and the fourth driving voltage to the third driving voltage application position and the fourth driving voltage application position of the second potential distribution line 1-422 respectively, and having a certain voltage difference between the third driving voltage and the fourth driving voltage, the potential between the two driving voltage application positions of the second potential distribution line 1-422 exhibits a gradient distribution, and different positions on the second potential distribution line 1-422 have different potentials. Since the second potential distribution line 1-422 has a certain resistance, there is a voltage drop on the potential distribution line. Because the magnitudes of the resistances between the connection positions of each fourth electrode line 1-423 and the second potential distribution line 1-422 and the application position where the third driving voltage is applied are different, the magnitudes of the potentials at the connection positions of each fourth electrode line 1-423 and the second potential distribution line 1-422 are also different. By controlling the connection positions of the fourth electrode line 1-423 and the second potential distribution line 1-422 and the passing positions of the third electrode line 1-413, the potential distribution of the liquid crystal optical device can be controlled.

[0026] As shown in FIG. 11, the projection of the third electrode line 1-413 on the plane where the fourth electrode line 1-423 is located covers the gap 1-44 between adjacent third electrode lines 1-413, and the projection of the fourth electrode line 1-423 on the plane where the third electrode line 1-413 is located covers the gap 1-44 between adjacent fourth electrode lines 1-423. Specifically, when implementing, the projection of the third electrode line 1-413 covers the gap 1-44 between adjacent fourth electrode lines 1-423, and the projection of the fourth electrode line 1-423 covers the gap 1-44 between adjacent third electrode lines 1-413.

[0027] As an optional but advantageous embodiment, in this example, the resistance value from the connection position of each third electrode line 1-413 on the first potential distribution line 1-412 to the first driving voltage application position, and the distance from the connection position of each third electrode line 1-413 and the first potential distribution line 1-412 in the second direction to the first driving voltage application position are in a parabolic relationship. That is, taking the resistance value from the connection position of each third electrode line 1-413 to the first driving voltage application position as the first coordinate (y), and the distance from the connection position of the corresponding third electrode line 1-413 and the first potential distribution line 1-412 to the first driving voltage application position as the second coordinate (x), the curve obtained in the rectangular coordinate system formed by the first coordinate and the second coordinate is a parabola. That is, y = kx 2 where k is a non-zero real number.

[0028] The resistance value from the connection position of each fourth electrode line 1-423 on the second potential distribution line 1-422 to the third driving voltage application position, and the distance from the connection position of each fourth electrode line 1-423 and the second potential distribution line 1-422 in the second direction to the third driving voltage application position are in a parabolic relationship. That is, taking the resistance value from the connection position of each fourth electrode line 1-423 to the third driving voltage application position as the first coordinate (y), and the distance from the connection position of the corresponding fourth electrode line 1-423 and the second potential distribution line 1-422 to the third driving voltage application position as the second coordinate (x), the curve obtained is a parabola. The curve obtained in the rectangular coordinate system formed by the first coordinate and the second coordinate is a parabola. That is, y = kx1-2, where k is a non-zero real number. The second direction and the first direction are perpendicular.

[0029] Since the resistance value from the connection position of each third electrode line 1-413 on the first potential distribution line 1-412 to the first driving voltage application position, and the distance from the connection position of each third electrode line 1-413 in the second direction to the first driving voltage application position are in a parabolic relationship, each third electrode line 1-413 can form a potential distribution of a parabolic cylinder surface in the surrounding space.

[0030] Since the resistance value from the connection position with each fourth electrode line 1-423 on the second potential distribution line 1-422 to the third drive voltage application position and the distance from the connection position of each fourth electrode line 1-423 in the second direction to the third drive voltage application position are in a parabolic relationship, each fourth electrode line 1-423 can form a potential distribution of a parabolic cylinder surface in the surrounding space.

[0031] After the projections of the first electrode structure 1-41 and the second electrode structure 1-42 cover each other, not only can a high-precision column lens be formed, but also the diffraction phenomenon can be effectively eliminated.

[0032] As an optional but advantageous embodiment, in this embodiment, the first potential distribution line 1-412 and the second potential distribution line 1-422 are potential distribution lines with uniform widths. The length from the connection position with each third electrode line 1-413 on the first potential distribution line 1-412 to the first drive voltage application position and the distance from the connection position of each third electrode line 1-413 in the second direction to the first drive voltage application position are in a parabolic relationship. The length from the connection position with each fourth electrode line 1-423 on the second potential distribution line 1-422 to the first drive voltage application position and the distance from the connection position of each fourth electrode line 1-423 in the second direction to the third drive voltage application position are in a parabolic relationship.

[0033] The first potential distribution line 1-412 and the second potential distribution line 1-422 in this embodiment both use potential distribution lines with a uniform width. In this way, in order to make the resistance values of each part on the first potential distribution line 1-412 and the second potential distribution line 1-422 proportional to the length, by controlling the length of the first potential distribution line 1-412 at the connection position between the third electrode line 1-413 and the first potential distribution line 1-412, and the length of the second potential distribution line 1-422 at the connection position between the fourth electrode line 1-423 and the second potential distribution line 1-422, the potentials controlled by the first electrode structure 1-41 and the second electrode structure 1-42 can be made into an accurate parabolic cylindrical surface distribution. In this embodiment, the width of the third electrode line 1-413 may be larger than the width of the fourth electrode line 1-423, or may be equal to the width of the fourth electrode line 1-423. As shown in FIGS. 12 to 14, the width of the third electrode line 1-413 may be even smaller than the width of the fourth electrode line 1-423. The first potential distribution line 1-412 and the second potential distribution line 1-422 may be on the same side (see FIG. 14), or may be on different both sides (see FIG. 15), and here, there is no limitation.

[0034] As shown in FIGS. 16 and 19, in this embodiment, the first electrode structure includes a third potential distribution line 1-414 extending from the position of the center of the liquid crystal lens toward the position of the edge of the liquid crystal lens, with each of the opposite ends being the first drive voltage application position and the second drive voltage application position, and a plurality of concentric arc electrode lines 1-46 that are respectively segments of the first electrode structure.

[0035] As shown in FIGS. 17 and 20, the second electrode structure includes a fourth potential distribution line 1-424 extending from the position of the center of the liquid crystal lens toward the position of the edge of the liquid crystal lens, with each of the opposite ends being the third drive voltage application position and the fourth drive voltage application position, and a plurality of concentric arc electrode lines 1-46 that are respectively segments of the first electrode.

[0036] As shown in FIGS. 18, 21 and 22, the projection of the concentric arc electrode lines 1-46 in the first electrode structure on the plane where the second electrode structure is located covers the projection between two adjacent concentric arc electrode lines 1-46 in the second electrode structure. When it is necessary to form a parabolic potential distribution, in this embodiment, one end of the concentric arc electrode line 1-46 is connected to the potential distribution line, and the other end floats in the air. Assuming that the connection position between the first potential distribution line and each arc electrode line is the potential extraction position, the resistance value from each potential extraction position of the first potential distribution line to the first drive voltage application position and the distance from each potential extraction position along the radial direction of the liquid crystal lens to the first drive voltage application position exhibit a parabolic distribution.

[0037] In order to obtain a large-aperture liquid crystal lens and reduce the voltage difference between drive voltages, as shown in FIGS. 22 to 26, the liquid crystal optical device of this embodiment may be configured as a liquid crystal Fresnel lens. In this case, as a selective but advantageous embodiment, as shown in FIG. 22, in this embodiment, the first electrode structure 1-41 includes a plurality of first electrode units arranged in order from the center to the edge of the second electrode layer 1-4. The surface electrode and each of the electrode units deflect the liquid crystal in the liquid crystal layer 1-3 under the drive of the first drive voltage and the second drive voltage to form a liquid crystal Fresnel lens.

[0038] As shown in FIG. 23, the second electrode structure 1-42 includes a plurality of first electrode units arranged in order from the center to the edge of the second electrode layer 1-4. The surface electrode and each of the first electrode units deflect the liquid crystal in the liquid crystal layer 1-3 under the drive of the third drive voltage and the fourth drive voltage to form a liquid crystal Fresnel lens. Each first electrode unit controls the deflection of the liquid crystal material in one annular zone, and the delay effect on the phase of the light beam passing through it after deflection is the same as that of one annular zone of the Fresnel lens. In this way, under the combined action of all the first electrode units, the liquid crystal material is deflected to form a liquid crystal Fresnel lens.

[0039] As an optional but advantageous embodiment, in this example, the first electrode structure 1-41 includes a plurality of second electrode units arranged along a first direction. The surface electrode and each of the electrode units deflect the liquid crystal in the liquid crystal layer 1-3 under the drive of the first driving voltage and the second driving voltage to form a liquid crystal Fresnel column lens. The second electrode structure 1-42 includes a plurality of second electrode units arranged along a first direction. The surface electrode and each of the second electrode units deflect the liquid crystal in the liquid crystal layer 1-3 under the drive of the third driving voltage and the fourth driving voltage to form a liquid crystal Fresnel column lens.

[0040] The liquid crystal Fresnel column lens formed by the foregoing structure not only has high potential distribution accuracy but also can effectively eliminate diffraction phenomena. For the effect of the potential distribution when using the liquid crystal lens in this example, reference may be made to FIGS. 27, 28, and 29.

[0041] <Example 2> As shown in FIG. 30, this example provides a liquid crystal optical device. The liquid crystal optical device in this example mainly includes a first substrate 2-1, a first electrode layer 2-2, a liquid crystal layer 2-3, a second electrode layer 2-4, and a second substrate 2-5 which are sequentially stacked.

[0042] The form of the first electrode layer 2-2 may be provided as needed. For example, it may be provided as a surface electrode, thus forming an equipotential plane, or it may be provided in the form of various patterned electrodes, which is not limited here.

[0043] As shown in FIG. 31, the second electrode layer 2-4 includes a first insulating layer 2-42 and an electrode unit 2-41. As shown in FIG. 30, the electrode unit 2-41 includes a first electrode structure 2-411 and a second electrode structure 2-412 that are respectively located on opposite sides of the first insulating layer 2-42. The electrode unit 2-41 is provided with a first driving voltage application position for receiving a first driving voltage V1 and a second driving voltage application position for receiving a second driving voltage V2. The first driving voltage and the second driving voltage are different, and they are driven to deflect liquid crystal molecules using a voltage difference. For example, in the case of a positive-type liquid crystal material arranged along a plane, a positive lens is obtained when the first driving voltage V1 = 1.6Vrms and the second driving voltage V2 = 2.0Vrms, and a negative lens is obtained when V1 = 2.0Vrms and V2 = 1.6Vrms.

[0044] The electrode unit 2-41 in this embodiment is distributed in two different planes, that is, a part of one side of the electrode unit 2-41 is located on the side far from the liquid crystal layer of the first insulating layer 2-42, and a part of the other side is located on the side close to the liquid crystal layer of the first insulating layer 2-42. For the sake of convenience of explanation, the part distributed on the same side of the first insulating layer 2-42 in the electrode unit 2-41 is called one sub-part. That is, for the aforementioned first electrode structure 2-411 and second electrode structure 2-412, the first electrode structure 2-411 may be provided on the side far from the liquid crystal layer of the first insulating layer 2-42, and the second electrode structure 2-412 may be provided on the side close to the liquid crystal layer of the first insulating layer 2-42. Or the second electrode structure 2-412 may be provided on the side far from the liquid crystal layer of the first insulating layer 2-42, and the first electrode structure 2-411 may be provided on the side close to the liquid crystal layer of the first insulating layer 2-42. Here, it is not limited. The electrode unit 2-41 of this embodiment includes a first electrode structure 2-411 and a second electrode structure 2-412 that are distributed on opposite sides of the first insulating layer 2-42. However, the first electrode structure 2-411 and the second electrode structure 2-412 belong to the same overall electrode unit 2-41 and are electrically connected to each other, and can generate a potential exhibiting a gradient distribution under the drive of the first driving voltage and the second driving voltage. In this way, the distribution of the space potential can be controlled by controlling the passing position in the space of the electrode unit 2-41.

[0045] The first electrode structure 2-411 includes at least two first segments, and there is a gap 2-47 between at least some adjacent first segments among them. The second electrode structure 2-412 includes at least two second segments, and there is a gap 2-47 between at least some adjacent second segments among them. The projection of the second electrode structure 2-412 on the first reference plane at least partially covers the gap 2-47 between adjacent first segments in the first electrode structure 2-411. The projection of the first electrode structure 2-411 on the first reference plane at least partially covers the gap 2-47 between adjacent second segments in the second electrode structure 2-412. The first reference plane is the upper surface or the lower surface of the first electrode structure 2-411, and the second reference plane is the upper surface or the lower surface of the second electrode structure 2-412.

[0046] In some regions of the first electrode structure 2-411, it is necessary to have a potential difference between different parts. Therefore, in order not to affect each other, it is necessary to leave a gap 2-47 between adjacent first segments in these regions.

[0047] Similarly, in some regions of the second electrode structure 2-412, it is necessary to have a potential difference between different parts. Therefore, in order not to affect each other, it is necessary to leave a gap 2-47 between adjacent second segments in these regions.

[0048] The projection of one sub-part may at least partially cover the gap 2-47 of the other sub-part, or may completely cover the gap 2-47 of the other sub-part. Complete coverage means that the projection of one sub-part completely shields the gap 2-47 of the other sub-part. In this case, the area occupied by the projection of the sub-part may be larger than the gap 2-47 or exactly equal to the gap 2-47. Partial coverage means that the projection of one sub-part only occupies a part of the gap 2-47.

[0049] The first insulating layer 2-42 is provided with vias 2-43 penetrating the first insulating layer 2-42, the vias 2-43 are provided with connection portions, and the adjacent first segment and second segment are electrically connected through the connection portions. That is, each segment of the electrode unit 2-41 is alternately provided on the side of the first insulating layer 2-42 close to the liquid crystal layer and the side far from the liquid crystal layer. For example, the previous segment (i.e., the first segment) in the electrode unit 2-41 is on the side of the first insulating layer 2-42 close to the liquid crystal layer, and the next segment (i.e., the second segment) to be connected is provided on the side of the first insulating layer 2-42 far from the liquid crystal layer. The previous segment and the next segment are electrically connected through the connection portion provided on the via 2-43.

[0050] Also, for example, the previous segment (i.e., the second segment) in the electrode unit 2-41 is on the side of the first insulating layer 2-42 far from the liquid crystal layer, and the next segment (i.e., the first segment) to be connected is provided on the side of the first insulating layer 2-42 close to the liquid crystal layer. The previous segment and the next segment are electrically connected through the connection portion provided on the via 2-43. The position and shape of the via 2-43 may be provided as needed. For example, FIGS. 34 and 35 show two other installation forms of the via 2-43.

[0051] In this embodiment, the electrode units 2-41 are distributed on both sides of the first insulating layer 2-42, and a sufficient gap 2-47 can be maintained between adjacent portions of the electrode units 2-41 in the same layer. At the same time, the projection of the sub-portion on one side of the first insulating layer 2-42 in the electrode unit 2-41 covers the gap 2-47 between the adjacent segments on the other side, thereby preferably removing the diffraction phenomenon caused by the gap 2-47 between the adjacent segments and significantly improving the optical effect of the liquid crystal optical device.

[0052] As an optional but advantageous embodiment, in this embodiment, the projection of the first electrode structure 2-411 on the second reference plane overlaps with the gap 2-47 between the adjacent segments of the second electrode structure 2-412.

[0053] When the foregoing structure is adopted, the projection of the first electrode structure 2-411 and the gap 2-47 between adjacent segments of the second electrode structure 2-412 completely overlap. When the foregoing structure is adopted, not only can the diffraction phenomenon be eliminated, but also the capacitive effect between the upper and lower two sub-parts can be effectively reduced.

[0054] As shown in FIGS. 32 and 33, as an example, in this embodiment, the first electrode structure 2-411 includes a plurality of concentric arc portions 2-44 with different radii, which are one of the first segments. A gap 2-47 is provided between adjacent concentric arc portions 2-44 in the first electrode structure 2-411, and the number of concentric arc portions 2-44 in the first electrode structure 2-411 is 2 or more.

[0055] The second electrode structure 2-412 includes a plurality of concentric arc portions 2-44 with different radii, which are one of the second segments. A gap 2-47 is provided between adjacent concentric arc portions 2-44 in the second electrode structure 2-412. Adjacent concentric arc portions 2-44 in the first electrode structure 2-411 and the second electrode structure 2-412 are electrically connected through a connection portion. The number of concentric arc portions 2-44 in the second electrode structure 2-412 is 2 or more.

[0056] In this embodiment, the concentric arc portions 2-44 with different radii in the electrode unit 2-41 are used to control the potential distribution at different radii of the liquid crystal lens. Adjacent concentric arc portions 2-44 are respectively on opposite sides of the first insulating layer 2-42 and are electrically connected through a connection portion provided in the via 2-43. Thereby, the potential can be attenuated or amplified one turn by one turn along the electrode unit 2-41 outward. Overall, the electrode unit 2-41 can form a potential distribution of a paraboloid of revolution in space under the action of the first driving voltage and the second driving voltage.

[0057] The projection on the plane where the second electrode structure 2-412 of the concentric arc portion 2-44 belonging to the first electrode structure 2-411 is located covers at least partially the gap 2-47 between adjacent concentric arc portions 2-44 belonging to the second electrode structure 2-412. The projection on the second reference plane of the concentric arc portion 2-44 belonging to the first electrode structure 2-411 covers at least partially the gap 2-47 between adjacent concentric arc portions 2-44 belonging to the second electrode structure 2-412. In this way, the diffraction phenomenon occurring in the gap 2-47 between the concentric arc portions 2-44 in the same layer can be effectively removed.

[0058] As shown in FIGS. 36, 37, and 38, in this embodiment, a liquid crystal column lens can be further realized. In this case, the electrode unit 2-41 includes a potential distribution line 2-45 and at least two electrode lines 2-431. A part of one side of the potential distribution line 2-45 belongs to the first electrode structure 2-411, and a part of the other side belongs to the second electrode structure 2-412. A part of one side of the electrode line 2-431 belongs to the first electrode structure 2-411, and a part of the other side of the electrode line 2-431 belongs to the second electrode structure 2-412. Each electrode line 2-431 belonging to the first electrode structure 2-411 is one of the first segments, and each electrode line 2-431 belonging to the second electrode structure 2-412 is one of the second segments. The electrode line 2-431 has a linear shape, and the plurality of electrode lines 2-431 are all parallel to the first direction. The first driving voltage application position and the second driving voltage application position are provided on the potential distribution line 2-45. One end of the electrode line 2-431 is connected to the potential distribution line 2-45, and the opposite end floats in the air.

[0059] After applying the first driving voltage and the second driving voltage to the first driving voltage application position and the second driving voltage application position of the potential distribution line 2-45 respectively, and having a certain voltage difference between the first driving voltage and the second driving voltage, the potential between the two driving voltage application positions of the potential distribution line 2-45 exhibits a gradient distribution, and different positions on the potential distribution line 2-45 have different potentials.

[0060] In this embodiment, the connection position between the electrode line 2-431 and the potential distribution line 2-45 is between the first driving voltage application position and the second driving voltage application position, and the connection positions between different electrode lines 2-431 and the potential distribution line 2-45 are different. Since the potential distribution line 2-45 has a certain resistance, there is a voltage drop on the potential distribution line 2-45. Because the magnitudes of the resistances between the connection positions of each electrode line 2-431 and the potential distribution line 2-45 and the first driving voltage application position are different, the magnitudes of the potentials at the connection positions of each electrode line 2-431 and the potential distribution line 2-45 are also different. By controlling the connection positions between the first electrode line and the potential distribution line 2-45 and the passing positions of the electrode line 2-431, the potential distribution of the liquid crystal optical device can be controlled.

[0061] The projection of the electrode line 2-431 belonging to the first electrode structure 2-411 on the second reference plane covers the gap 2-47 between adjacent electrode lines 2-431 belonging to the second part, and the projection of the electrode line 2-431 belonging to the second electrode structure 2-412 on the first reference plane covers the gap 2-47 between adjacent electrode lines 2-431 belonging to the first part. In this embodiment, by covering the gap 2-47 between the electrode lines 2-431 with the projections of the electrode lines 2-431 respectively belonging to the two sub-parts, the capacitive effect generated by the electrode unit 2-41 after applying the driving voltage can be effectively eliminated. The adjacent electrode lines 2-431 on both sides can be electrically connected by a connection part provided in the via.

[0062] As an example, in this embodiment, the resistance value from the connection position between each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position between each electrode line 2-431 and the potential distribution line 2-45 in the second direction to the first driving voltage application position are in a parabolic relationship or a linear relationship, and the second direction and the first direction are perpendicular to each other.

[0063] As shown in Fig. 36, when the resistance value from the connection position of each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position of each electrode line 2-431 and the potential distribution line 2-45 in the second direction to the first driving voltage application position are in a parabolic relationship, taking the resistance value from the connection position of each electrode line 2-431 to the first driving voltage application position as the first coordinate (y), and taking the distance from the connection position of the corresponding electrode line 2-431 and the potential distribution line 2-45 to the first driving voltage application position as the second coordinate (x), the function image obtained in the rectangular coordinate system formed by the first coordinate and the second coordinate is a parabola. That is, y = kx 2 is satisfied, and k is a non-zero real number.

[0064] As shown in Figs. 37 and 38, when the resistance value from the connection position of each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position of each electrode line 2-431 and the potential distribution line 2-45 in the second direction to the first driving voltage application position are in a linear relationship, taking the resistance value from the connection position of each electrode line 2-431 to the first driving voltage application position as the first coordinate (y), and taking the distance from the connection position of the corresponding electrode line 2-431 and the potential distribution line 2-45 to the first driving voltage application position as the second coordinate (x), the function image obtained in the rectangular coordinate system formed by the first coordinate and the second coordinate is a straight line. That is, it satisfies y = ax + b, where a is a non-zero real number and b is any real number. The position of the via 2-43 may be provided as required, and Figs. 37 and 38 show two different installation forms of the via 2-43 in the case of a linear relationship.

[0065] When the resistance value from the connection position of each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position of each electrode line 2-431 in the second direction to the first driving voltage application position are in a parabolic relationship, each electrode line 2-431 can jointly form the potential distribution of a parabolic cylinder surface in the surrounding space.

[0066] When the resistance value from the connection position of each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position of each electrode line 2-431 in the second direction to the first driving voltage application position are in a linear relationship, each electrode line 2-431 can jointly form the potential distribution of the tapered surface in the surrounding space.

[0067] In this embodiment, the potential distribution line 2-45 is a potential distribution line 2-45 with a uniform width, and the length from the connection position of each electrode line 2-431 on the potential distribution line 2-45 to the first driving voltage application position and the distance from the connection position of each electrode line 2-431 in the second direction to the first driving voltage application position are in a parabolic relationship or a linear relationship.

[0068] The potential distribution line 2-45 of this embodiment uses a potential distribution line 2-45 with a uniform width. In this way, in order to make the resistance value of each part of the potential distribution line 2-45 proportional to the length, by controlling the length of the potential distribution line 2-45 at the connection position between the potential distribution line 2-45 and the electrode line 2-431, the potential controlled by the electrode unit 2-41 can be made into an accurate parabolic cylindrical surface distribution or tapered surface distribution.

[0069] In order to obtain a large-aperture liquid crystal lens and reduce the voltage difference between driving voltages, as shown in FIGS. 39 to 40, the liquid crystal optical device of this embodiment may be configured as a liquid crystal Fresnel lens. In this case, as an optional but advantageous embodiment, in this embodiment, the second electrode layer 2-4 includes a plurality of electrode units 2-41 arranged in order from the center to the edge of the second electrode layer 2-4, which deflect the liquid crystal in the liquid crystal layer under the driving of the first driving voltage and the second driving voltage respectively to form a liquid crystal Fresnel lens. The electrode unit 2-41 may use the aforementioned electrode unit 2-41 having a concentric arc portion 2-44.

[0070] Each electrode unit 2-41 controls to deflect the liquid crystal material in one annular zone, and the delay effect on the phase of the light beam passing through after deflection is the same as that of one annular zone of the Fresnel lens. In this way, under the combined action of all the electrode units 2-41, the liquid crystal material is deflected to form a liquid crystal Fresnel lens. The liquid crystal Fresnel lens formed by the above structure not only has high potential distribution accuracy, but also can effectively eliminate the diffraction phenomenon.

[0071] It should be noted that this embodiment can further realize a liquid crystal Fresnel column lens. In this case, the second electrode layer 2-4 includes a plurality of electrode units 2-41 arranged along the first direction, which deflect the liquid crystal in the liquid crystal layer under the drive of the first driving voltage and the second driving voltage respectively to form a liquid crystal Fresnel column lens. The electrode unit 2-41 may use the above-mentioned electrode unit 2-41 having a potential distribution line 2-45 and a first electrode. The liquid crystal Fresnel column lens formed by adopting the above structure not only has high potential distribution accuracy, but also can effectively eliminate the diffraction phenomenon.

[0072] In this embodiment, a high-impedance film or a high-dielectric constant layer or a potential buffer layer may be provided on the side facing the insulating layer of the first electrode unit, or a high-impedance film or a high-dielectric constant layer or a potential buffer layer may be provided on the side away from the insulating layer of the first electrode unit, and / or a high-impedance film or a high-dielectric constant layer or a potential buffer layer may be provided on the side facing the insulating layer of the second electrode unit, or a high-impedance film or a high-dielectric constant layer or a potential buffer layer may be provided on the side away from the insulating layer of the second electrode unit.

[0073] In this embodiment, by providing the above-mentioned high-impedance film or high-dielectric constant layer or potential buffer layer on the liquid crystal lens, the potential distribution between adjacent portions of the first electrode unit and / or the second electrode unit can be made smoother. In this embodiment, the first electrode layer 2-2 may use a planar electrode.

[0074] <Example 3> This example provides an electronic product, which includes a control circuit electrically connected to the liquid crystal optical device and the liquid crystal optical device described in Example 1 and Example 2. The electronic product includes, but is not limited to, an imaging device, a display device, a mobile phone, an AR device, a VR device, a naked-eye 3D product, a wearable device, etc.

Explanation of Reference Signs

[0075] Members and their numbers in FIGS. 1 to 29: 1-1 First substrate 1-2 First electrode layer 1-3 Liquid crystal layer 1-4 Second electrode layer 1-41 First electrode structure 1-411 First electrode line 1-412 First potential distribution line 1-413 Third electrode line 1-414 Third potential distribution line 1-42 Second electrode structure 1-421 Second electrode line 1-422 Second potential distribution line 1-423 Fourth electrode line 1-424 Fourth potential distribution line 1-431 Concentric arc part 1-432 Connecting part 1-44 Gap 1-45 Insulating layer 1-46 Concentric arc electrode line 1-5 Second substrate Members and their numbers in FIGS. 30 to 40 and FIGS. 1 to 30: 2-1 First substrate 2-2 First electrode layer 2-3 Liquid crystal layer 2-4 Second electrode layer 2-41 Electrode unit 2-411 First electrode structure 2-412 First segment, second electrode structure 2-431 Second segment, electrode line 2-42 First insulating layer 2-43 Via 2-44 Concentric arc part 2-45 Potential distribution line 2-47 Gap 2-491 First electrode lead 2-492 Second electrode lead 2-5 Second substrate

Claims

1. A liquid crystal optical device, comprising a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer, and a second substrate, which are sequentially stacked and provided, wherein the second electrode layer includes an insulating layer, a first electrode structure, and a second electrode structure, one of the first electrode structure and the second electrode structure is located on the surface of the insulating layer facing the liquid crystal layer, and the other is located on the surface of the insulating layer away from the liquid crystal layer, and a projection of the second electrode structure on the plane where the first electrode structure is located covers the gap of the first electrode structure. A liquid crystal optical device characterized by this.

2. The first electrode structure is provided with a first driving voltage application position for receiving a first driving voltage and a second driving voltage application position for receiving a second driving voltage, and the first driving voltage and the second driving voltage are different. The second electrode structure is provided with a third driving voltage application position for receiving a third driving voltage and a fourth driving voltage application position for receiving a fourth driving voltage, and the third driving voltage and the fourth driving voltage are different. The liquid crystal optical device according to claim 1, characterized by this.

3. The first electrode structure includes at least two segments, and there is a gap between at least some adjacent segments in the first electrode structure. The second electrode structure includes at least two segments, and there is a gap between at least some adjacent segments in the second electrode structure. All or part of the projection of the second electrode structure on the plane where the first electrode structure is located covers the gap between adjacent segments of the first electrode structure, and all or part of the projection of the first electrode structure on the plane where the second electrode structure is located covers the gap between adjacent segments of the second electrode structure. A third electrode structure is provided in the first electrode layer. The liquid crystal optical device according to claim 2, characterized by this.

4. The projection of the first electrode structure on the plane where the second electrode structure is located overlaps with the gap between adjacent segments of the second electrode structure. The liquid crystal optical device according to claim 3, characterized by this.

5. The first electrode structure includes a first electrode line extending from an end close to the center position of the second electrode layer toward an end close to the edge position of the second electrode layer. One end is used to receive the first driving voltage, and the other end is used to receive the second driving voltage. The second electrode structure includes a second electrode line that extends from an end close to the center position of the second electrode layer toward an end close to the edge position of the second electrode layer, one end of which is used to receive a third driving voltage and the other end of which is used to receive a fourth driving voltage. The liquid crystal optical device according to claim 3 is characterized by this.

6. Each of the first electrode lines includes a plurality of concentric arc portions with different radii that are segments of the first electrode structure. A gap is provided between adjacent concentric arc portions in the first electrode line, and adjacent concentric arc portions in the first electrode line are connected via a connecting portion. Each of the second electrode lines includes a plurality of concentric arc portions with different radii that are segments of the second electrode structure. A gap is provided between adjacent concentric arc portions in the second electrode line, and adjacent concentric arc portions in the second electrode line are connected via a connecting portion. The liquid crystal optical device according to claim 5 is characterized by this.

7. The first electrode structure includes a third potential distribution line that extends from the position of the center of the liquid crystal lens toward the position of the edge of the liquid crystal lens, and each of the opposite ends is a first driving voltage application position and a second driving voltage application position. and a plurality of concentric arc electrode lines that are each a segment of the first electrode structure. The second electrode structure includes a fourth potential distribution line that extends from the position of the center of the liquid crystal lens toward the position of the edge of the liquid crystal lens, and each of the opposite ends is a third driving voltage application position and a fourth driving voltage application position. and a plurality of concentric arc electrode lines that are each a segment of the second electrode structure. The liquid crystal optical device according to claim 3 is characterized by this.

8. The first electrode structure includes a plurality of first electrode units arranged in order from the center to the edge of the second electrode layer, which deflect liquid crystals in the liquid crystal layer under the driving of the first driving voltage and the second driving voltage respectively to form a liquid crystal Fresnel lens. The second electrode structure includes a plurality of second electrode units arranged in order from the center to the edge of the second electrode layer, which deflect liquid crystals in the liquid crystal layer under the driving of the third driving voltage and the fourth driving voltage respectively to form a liquid crystal Fresnel lens. The liquid crystal optical device according to claim 2 is characterized by this.

9. The insulating layer of the second electrode layer is a first insulating layer. The second electrode layer includes at least one electrode unit including the first electrode structure and the second electrode structure located on opposite sides of the first insulating layer respectively. The electrode unit is provided with a first driving voltage application position for receiving a first driving voltage and a second driving voltage application position for receiving a second driving voltage. The first driving voltage and the second driving voltage are different. The projection of the first electrode structure on the second reference plane covers the gap of the second electrode structure. The liquid crystal optical device according to claim 1, characterized in that.

10. The first electrode structure includes at least two first segments, and there is a gap between at least some adjacent first segments among them. The second electrode structure includes at least two second segments, and there is a gap between at least some adjacent second segments among them. The projection of the second electrode structure on the first reference plane at least partially covers the gap between adjacent first segments in the first electrode structure. The projection of the first electrode structure on the second reference plane at least partially covers the gap between adjacent second segments in the second electrode structure. The first reference plane is the upper surface or the lower surface of the first electrode structure. The second reference plane is the upper surface or the lower surface of the second electrode structure. The first insulating layer is provided with vias penetrating the first insulating layer. The vias are provided with connection portions. The adjacent first segments and second segments are electrically connected through the connection portions. The liquid crystal optical device according to claim 9, characterized in that.

11. The projection of the first electrode structure on the second reference plane overlaps with the gap between adjacent second segments. The liquid crystal optical device according to claim 9, characterized in that.

12. The first electrode structure includes a plurality of concentric arc portions with different radii, each of which is one of the first segments. A gap is provided between adjacent concentric arc portions in the first electrode structure. The second electrode structure includes a plurality of concentric arc portions with different radii, each of which is one of the second segments. A gap is provided between adjacent concentric arc portions in the second electrode structure. The adjacent concentric arc portions in the first electrode structure and the second electrode structure are electrically connected through a connection portion. The projection of the concentric arc portion belonging to the first electrode structure on the second reference plane covers at least partially the gap between adjacent concentric arc portions belonging to the second electrode structure. The projection of the concentric arc portion belonging to the second electrode structure on the first reference plane covers at least partially the gap between adjacent concentric arc portions belonging to the first electrode structure. The liquid crystal optical device according to claim 10, characterized in that.

13. The second electrode layer The liquid crystal optical device according to claim 9, characterized in that it includes a plurality of electrode units arranged in order from the center to the edge of the second electrode layer, which deflect the liquid crystal in the liquid crystal layer under the drive of the first drive voltage and the second drive voltage respectively to form a liquid crystal Fresnel lens.

14. An electronic product, comprising: a control circuit electrically connected to the liquid crystal optical device; and the liquid crystal optical device according to claim 1. The electronic product is characterized in that.

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