CN118131540A - Liquid crystal optical device and electronic product - Google Patents

Abstract

The invention relates to the technical field of liquid crystal optical devices, in particular to a liquid crystal optical device and an electronic product. The liquid crystal optical device comprises a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer and a second substrate which are sequentially stacked; the second electrode layer comprises an insulating layer, a first electrode structure and a second electrode structure, wherein one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing the liquid crystal layer, and the other one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing 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 between the 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 the adjacent segments of the second electrode structure. The invention can effectively eliminate the diffraction phenomenon of the liquid crystal optical device.

Description

Liquid crystal optical device and electronic product

Technical Field

The invention relates to the technical field of liquid crystal optical devices, in particular to a liquid crystal optical device and an electronic product.

Background

In order to improve the accuracy of spatial potential distribution of liquid crystal optical devices such as liquid crystal lenses, liquid crystal fresnel lenses, and the like, the applicant has proposed to employ electrode lines that can generate a gradient-varying distributed potential in the liquid crystal optical device, and to precisely control the spatial potential distribution in the functional region of the liquid crystal optical device by controlling the position through which the electrode lines pass in the functional region of the liquid crystal optical device. However, with the above-described structure, the liquid crystal optical device may exhibit a diffraction phenomenon affecting its optical effect, which may adversely affect the refractive type liquid crystal optical device.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a liquid crystal optical device and an electronic product, which are used for solving the technical problem that an obvious diffraction phenomenon occurs in the existing refractive liquid crystal optical device.

The technical scheme adopted by the invention is as follows:

In a first aspect, the present invention provides a liquid crystal optical device, including a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer, and a second substrate, which are sequentially stacked;

The second electrode layer comprises an insulating layer, a first electrode structure and a second electrode structure, one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing the liquid crystal layer, the other one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing away from the liquid crystal layer, a first driving voltage loading position and a second driving voltage loading position are arranged on the first electrode structure, the first driving voltage loading position is used for receiving a first driving voltage, the second driving voltage loading position is used for receiving a second driving voltage, the first driving voltage is different from the second driving voltage, a third driving voltage loading position and a fourth driving voltage loading position are arranged on the second electrode structure, the third driving voltage loading position is used for receiving a third driving voltage, the fourth driving voltage loading position is used for receiving a fourth driving voltage, and the third driving voltage and the fourth driving voltage are different;

The first electrode structure comprises at least two segments, a gap is reserved between at least a part of adjacent segments in the first electrode structure, the second electrode structure comprises at least two segments, a gap is reserved between at least a part of adjacent segments in the second electrode structure, the projection of the second electrode structure on the plane of the first electrode structure completely or partially covers the gap between the adjacent segments of the first electrode structure, and the projection of the first electrode structure on the plane of the second electrode structure completely or partially covers the gap between the adjacent segments of the second electrode structure;

The first electrode layer is provided with a third electrode structure.

Preferably, the projection of the first electrode structure onto the plane of the second electrode structure coincides with the gap between adjacent segments of the second electrode structure.

Preferably, the first electrode structure includes a first electrode line extending from one end near a center position of the second electrode layer toward one end near an edge position of the second electrode layer, one end of the first electrode line being for receiving a first driving voltage, and the opposite end being for receiving a second driving voltage;

the second electrode structure comprises a second electrode wire extending from one end close to the center of the second electrode layer to one end close to the edge of the second electrode layer, wherein one end of the second electrode wire is used for receiving a third driving voltage, and the other opposite end is used for receiving a fourth driving voltage.

Preferably, the first electrode wire comprises a plurality of concentric arc sections with different radiuses, each concentric arc section in the first electrode wire is used as the subsection of one first electrode structure, a gap is arranged between every two adjacent concentric arc sections in the first electrode wire, and the adjacent concentric arc sections in the first electrode wire are connected through a connecting section; the second electrode wire comprises a plurality of concentric arc sections with different radiuses, each concentric arc section in the second electrode wire is used as the section of a second electrode structure, a gap is arranged between every two adjacent concentric arc sections in the second electrode wire, and every two adjacent concentric arc sections in the second electrode wire are connected through a connecting section.

Preferably, the first electrode structure includes a first potential distribution line and a plurality of third electrode lines, each third electrode line is used as the segment of one first electrode structure, the third electrode lines are in a straight line shape, the plurality of third electrode lines are parallel to a first direction, a first driving voltage loading position and a second driving voltage loading position are arranged on the first potential distribution line, one end of each third electrode line is connected with the first potential distribution line, and the opposite end of each third electrode line is suspended;

The position where the third electrode wire is connected with the first potential distribution wire is between a first driving voltage loading position and a second driving voltage loading position, and the positions where different third electrode wires are connected with the first potential distribution wire are different;

The second electrode structure comprises a second potential distribution line and a plurality of fourth electrode lines, each fourth electrode line is used as the segment of one second electrode structure, the fourth electrode lines are in a straight line shape, the plurality of fourth electrode lines are parallel to the first direction, the third driving voltage loading position and the fourth driving voltage loading position are arranged on the second potential distribution line, one end of each fourth electrode line is connected with the second potential distribution line, and the other opposite end of each fourth electrode line is suspended;

The position where the fourth electrode wire is connected with the second potential distribution wire is located between a third driving voltage loading position and a fourth driving voltage loading position, the positions where different fourth electrode wires are connected with the second potential distribution wire are different, the projection of the fourth electrode wire on the plane where the third electrode wire is located covers the gap between the adjacent third electrode wires, and the projection of the third electrode wire on the plane where the fourth electrode wire is located covers the gap between the adjacent fourth electrode wires.

Preferably, the resistance value between the position on the first potential distribution line connected to each third electrode line and the first driving voltage loading position is parabolic to the distance between the position on the second direction connected to each third electrode line and the first potential distribution line and the first driving voltage loading position;

The resistance value between the position, connected with each fourth electrode wire, on the second potential distribution wire and the third driving voltage loading position is parabolic with the distance between the position, connected with each fourth electrode wire and the second potential distribution wire, on the second direction and the third driving voltage loading position, and the second direction and the first direction are mutually perpendicular.

Preferably, the first potential distribution line and the second potential distribution line are potential distribution lines with uniform width, and the length between the position connected with each third electrode line on the first potential distribution line and the first driving voltage loading position and the distance between the position connected with each third electrode line on the second direction and the first driving voltage loading position are parabolic;

The length between the position on the second electric potential distribution line connected with each fourth electrode line and the first driving voltage loading position and the distance between the position on the second direction connected with each fourth electrode line and the third driving voltage loading position are parabolic.

Preferably, the first electrode structure comprises a third potential distribution line and a plurality of concentric arc electrode lines, each concentric arc electrode line in the first electrode structure is used as the segment of one first electrode structure, the third potential distribution line extends from the position of the center of the liquid crystal lens to the position of the edge of the liquid crystal lens, and two opposite ends of the third potential distribution line are respectively provided with a first driving voltage loading position and a second driving voltage loading position;

The second electrode structure comprises a fourth potential distribution line and a plurality of concentric arc electrode lines, each concentric arc electrode line in the second electrode structure serves as a second electrode structure section, the fourth potential distribution line extends from the position of the center of the liquid crystal lens to the position of the edge of the liquid crystal lens, and two opposite ends of the fourth potential distribution line are respectively a third driving voltage loading position and a fourth driving voltage loading position.

Preferably, the first electrode structure includes a plurality of first electrode units sequentially arranged from the center to the edge of the second electrode layer, and each electrode unit deflects liquid crystal in the liquid crystal layer to form a liquid crystal fresnel lens under the driving of the first driving voltage and the second driving voltage;

the second electrode structure comprises a plurality of first electrode units which are sequentially arranged from the center of the second electrode layer to the edge, and the first electrode units deflect liquid crystals in the liquid crystal layer to form a liquid crystal Fresnel lens under the driving of the third driving voltage and the fourth driving voltage.

Preferably, the first electrode structure includes a plurality of second electrode units arranged along a first direction, and each of the electrode units deflects liquid crystal in the liquid crystal layer to form a liquid crystal fresnel column lens under the driving of the first driving voltage and the second driving voltage;

The second electrode structure comprises a plurality of second electrode units which are arranged along the first direction, and the second electrode units deflect liquid crystals in the liquid crystal layer to form liquid crystal Fresnel column lenses under the driving of the third driving voltage and the fourth driving voltage.

In a second aspect, the present invention further provides an electronic product, including a control circuit and the liquid crystal optical device of the first aspect, where the control circuit is electrically connected to the liquid crystal optical device.

The beneficial effects are that: the liquid crystal optical device and the electronic product are provided with the first electrode structure and the second electrode structure in the second electrode layer to control the distribution of a space electric field in the liquid crystal optical device, and the two electrode structures are separated by the insulating layer, so that the two electrode structures are mutually insulated. And the projection of the second electrode structure on the plane where the first electrode structure is located covers the gap between the 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 the adjacent segments of the second electrode structure, so that diffraction phenomenon generated when only one electrode structure loads driving voltage is eliminated well, and the optical effect of the liquid crystal optical device is improved obviously.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described, and it is within the scope of the present invention to obtain other drawings according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exploded structure of a liquid crystal optical device of the present invention;

FIG. 2 is a cross-sectional view of a liquid crystal optical device of the present invention;

FIG. 3 is a schematic view of a first electrode structure of the present invention using concentric circular arc shapes;

FIG. 4 is a schematic view of a first second electrode structure of the present invention using concentric circular arc shapes;

FIG. 5 is a schematic view of a first embodiment of the present invention in which projections of a first electrode structure and a second electrode structure are formed in concentric circular shapes;

FIG. 6 is a schematic view of a second first electrode structure of the present invention using concentric circular arc shapes;

FIG. 7 is a schematic view of a second electrode structure of the present invention using concentric circular arc shapes;

FIG. 8 is a schematic view of a second embodiment of the present invention in which the projections of the first electrode structure and the second electrode structure are in concentric circular arc shapes;

FIG. 9 is a schematic diagram of a first electrode configuration employing a first potential distribution line in accordance with the present invention;

FIG. 10 is a schematic diagram of a second electrode configuration employing a second potential distribution line in accordance with the present invention;

FIG. 11 is a schematic view of the third electrode line and the fourth electrode line of the present invention overlaid with each other;

FIG. 12 is a schematic view of another first electrode structure employing a first potential distribution line according to the present invention;

FIG. 13 is a schematic diagram of another second electrode configuration employing a second potential distribution line in accordance with the present invention;

FIG. 14 is a schematic view of a third electrode line and a fourth electrode line partially covered in the present invention;

FIG. 15 is a schematic view of another third electrode line and a fourth electrode line partially covered in the present invention;

FIG. 16 is a schematic diagram of a second electrode configuration employing a third potential distribution line in accordance with the present invention;

FIG. 17 is a schematic diagram of a second electrode configuration employing a fourth potential distribution line in accordance with the present invention;

Fig. 18 is a schematic view of the first and second electrode structures of fig. 16 and 17 overlaying each other;

FIG. 19 is a schematic diagram of another second electrode configuration employing a third potential distribution line in accordance with the present invention;

FIG. 20 is a schematic diagram of another second electrode configuration employing a fourth potential distribution line in accordance with the present invention;

Fig. 21 is a schematic view of the first and second electrode structures of fig. 19 and 20 overlaid with each other;

FIG. 22 is a schematic view of the alternative first and second electrode structures of FIGS. 19 and 20 overlaying each other;

FIG. 23 is a schematic view showing a first electrode structure of a Fresnel liquid crystal lens according to the present invention;

FIG. 24 is a schematic view showing a second electrode structure of the Fresnel liquid crystal lens of the present invention;

Fig. 25 is a schematic view of the first and second electrode structures of fig. 23 and 24 overlaying each other;

FIG. 26 is a schematic view of the alternative first and second electrode structures of FIGS. 23 and 24 overlaying each other;

FIG. 27 is a schematic diagram showing the potential distribution of the second electrode layer of the prior art using an electrode structure;

FIG. 28 is a schematic diagram showing the potential distribution of one of the two electrode structures of the present invention when the driving voltage is applied and the other electrode structure is not applied;

fig. 29 is a schematic diagram showing the potential distribution when the driving voltage is applied to both electrode structures in the present invention.

Parts and numbers in the figure:

The first substrate 1, the first electrode layer 2, the liquid crystal layer 3, the second electrode layer 4, the first electrode structure 41, the first electrode line 411, the first potential distribution line 412, the third electrode line 413, the third potential distribution line 414, the second electrode structure 42, the second electrode line 421, the second potential distribution line 422, the fourth electrode line 423, the fourth potential distribution line 424, the concentric arc segment 431, the connection segment 432, the gap 44, the insulating layer 45, the concentric arc electrode line 46, and the second substrate 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. If not conflicting, the embodiments of the present application and the features of the embodiments may be combined with each other, which are all within the protection scope of the present application.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a liquid crystal optical device, which mainly includes a first substrate 1, a first electrode layer 2, a liquid crystal layer 3, a second electrode layer 4, and a second substrate 5 that are sequentially stacked;

The liquid crystal optical device in this embodiment may adopt a layered arrangement. The first substrate 1, the first electrode layer 2, the liquid crystal layer 3, the second electrode layer 4, and the second substrate 5 are arranged in a stacked manner along the normal direction of each layer of the liquid crystal optical device. Wherein the first transparent substrate and the second transparent substrate can be made of transparent materials with certain strength and rigidity, such as glass substrates, plastic substrates and the like. Wherein the first substrate 1 may function as a support for liquid crystal optics. Wherein the first substrate 1 may act as a carrier for the first electrode layer 2, the first electrode layer 2 may be plated on the first substrate 1. The second substrate 5 also serves as a support for the second electrode layer 4.

The form of the third electrode structure in the first electrode layer may be set as required, for example, it may be set as a plane electrode, so that the first electrode layer 2 may form an equipotential plane, or it may be set as various pattern electrodes, which is not limited herein.

The second electrode layer 4 includes an insulating layer 45, a first electrode structure 41 and a second electrode structure 42, where one of the first electrode structure 41 and the second electrode structure 42 is located on a side of the insulating layer 45 facing the liquid crystal layer 3, and the other is located on a side of the insulating layer 45 facing away from the liquid crystal layer 3. The second electrode layer 4 in this embodiment adopts a structure of two electrodes disposed up and down, and the two electrodes are separated by an insulating layer 45. In the embodiment, the first electrode structure 41 may be disposed on a side of the insulating layer 45 facing the liquid crystal layer 3, the second electrode layer 4 may be disposed on a side of the insulating layer 45 facing away from the liquid crystal layer, or the second electrode structure 42 may be disposed on a side of the insulating layer 45 facing the liquid crystal layer 3, and the first electrode layer 2 may be disposed on a side of the insulating layer 45 facing away from the liquid crystal layer, which is not limited herein.

The first electrode structure 41 is provided with a first driving voltage loading position for receiving a first driving voltage and a second driving voltage loading position for receiving a second driving voltage. The first driving voltage is different from the second driving voltage.

When the first driving voltage is applied to the first electrode structure 41 at the first driving voltage applying position, and the second driving voltage is applied to the second electrode structure 42 at the second driving voltage applying position, the first electrode structure 41 can form a gradient-distributed electric potential, so that the spatial electric potential distribution can be controlled by controlling the position of the first electrode structure 41 passing through in space.

The second electrode structure 42 is provided with a third driving voltage loading position and a fourth driving voltage loading position, wherein the third driving voltage loading position is used for receiving a third driving voltage, and the fourth driving voltage loading position is used for receiving a fourth driving voltage; the third driving voltage and the fourth driving voltage are different.

When the third driving voltage is applied to the third driving voltage applying position of the second electrode structure 42, and the fourth driving voltage is applied to the fourth driving voltage applying position of the second electrode structure 42, the potential in gradient distribution can be formed on the second electrode structure 42, so that the distribution of the spatial potential can be controlled by controlling the position where the second electrode structure 42 passes through in space.

The first electrode structure 41 includes at least two segments, a gap 44 is formed between at least a portion of adjacent segments in the first electrode structure 41, the second electrode structure 42 includes at least two segments, a gap 44 is formed between at least a portion of adjacent segments in the second electrode structure 42, as shown in fig. 5, 8 and 11, a projection of the second electrode structure 42 on a plane where the first electrode structure 41 is located covers the gap 44 between adjacent segments of the first electrode structure 41 in whole or in part, and the first electrode structure 41 covers the gap 44 between adjacent segments of the second electrode structure 42 in whole or in part on the plane where the second electrode structure 42 is located. Where full coverage means that the projection of one electrode structure completely covers the gap 44, the area occupied by the projection of the electrode structure may be larger than the gap 44 or may be just as large as the gap 44. Wherein partial coverage means that the projection of one electrode structure only occupies a part of the gap 4. Wherein adjacent segments refer to different parts belonging to the same electrode structure, which are adjacent in spatial position. In order to generate a gradient distribution of the electric potential, the electric potential of the different parts is usually different in some regions of the first electrode structure 41, so that it is necessary to leave gaps 44 between adjacent segments in these regions to avoid mutual influence. And similarly, a gap 44 is provided between at least a portion of adjacent segments of the second electrode structure 42. The first electrode structure 41 or the second electrode structure 42 may generate a relatively precise spatial potential distribution when a driving voltage is applied alone, but may generate a diffraction phenomenon. In this embodiment, the first electrode structure 41 and the second electrode structure 42 are used to cover the gap 44 from one to the other, and the two electrode structures are simultaneously applied with voltage, so that the diffraction phenomenon of the liquid crystal optical device can be eliminated. The liquid crystal optical device in the present embodiment includes, but is not limited to, a liquid crystal lens and a liquid crystal fresnel lens.

The third driving voltage may be the same or different from the first driving voltage, when the third driving voltage is different from the first driving voltage, the third driving voltage may be greater than the first driving voltage or less than the first driving voltage, and when the fourth driving voltage is different from the second driving voltage, the fourth driving voltage may be greater than the second driving voltage or less than the second driving voltage. For example, the first driving voltage may be set to 1.6Vrms, the second driving voltage may be set to 2.5Vrms, the third driving voltage may be set to 1.65Vrms, and the fourth driving voltage may be set to 2.55Vrms.

As an alternative but advantageous embodiment, the projection of the first electrode structure 41 coincides with the gap 44 between adjacent segments of the second electrode structure 42 in this example. By adopting the structure, diffraction phenomenon can be eliminated, and capacitance effect between the upper electrode structure and the lower electrode structure can be effectively reduced. As an alternative but advantageous implementation, in this embodiment the first electrode structure 41 comprises a first electrode line 411 extending from one end near the center position of the second electrode layer 4 towards one end near the edge position of the second electrode layer 4, one end of the first electrode line 411 being adapted to receive a first driving voltage and the opposite end being adapted to receive a second driving voltage; in this embodiment, the first electrode lines 411 extend from inside to outside, so that the first electrode lines 411 can extend from inside to outside over each radial position in the second electrode layer 4, so that the functional area of the liquid crystal optical device presents a gradient-distributed electric potential, and the liquid crystal material in the liquid crystal layer 3 can deflect under the action of an electric field through the shape of the first electrode lines 411 to form a liquid crystal lens. The second electrode structure 42 includes a second electrode line 421 extending from one end near the center of the second electrode layer 4 toward one end near the edge of the second electrode layer 4, one end of the second electrode line 421 being for receiving a third driving voltage, and the opposite end being for receiving a fourth driving voltage. The second electrode structure 42 may also be configured similarly to the first electrode structure 41 in shape, so that it not only covers the gaps 44 between adjacent segments of the first electrode structure 41 well, but also keeps the electric potential distribution generated by the first electrode structure 41 uniform.

As shown in fig. 3, as an alternative but advantageous implementation manner, the first electrode wire 411 includes a plurality of concentric arc segments 431 with different radii in this embodiment, each concentric arc segment 431 in the first electrode wire 41 is used as the segment of the first electrode structure 41, a gap 44 is provided between adjacent arc segments in the first electrode wire 41, and adjacent arc segments in the first electrode wire are connected by a connection segment 432; as shown in fig. 3 and 6, the second electrode wire 421 includes a plurality of concentric arc segments 431 with different radii, a gap 44 is provided between adjacent arc segments in the second electrode wire, each concentric arc segment 431 in the second electrode wire 42 is used as the segment of the second electrode structure 42, and adjacent arc segments in the second electrode wire are connected by a connection segment 432. Wherein the projection of the arc segments in the first electrode structure onto the plane of the second electrode structure fully or partially covers the gap between adjacent concentric arc segments in the second electrode structure.

In the embodiment, concentric arc sections 431 with different radiuses are utilized to control the electric potential distribution at different radiuses of the liquid crystal lens, the concentric arc sections 431 are connected through a connecting section 432, and when two driving voltage loading positions of a first electrode wire 411 are respectively loaded with a first driving voltage and a second driving voltage, accurate parabolic electric potential distribution can be formed, so that the high-precision liquid crystal lens is obtained; as shown in fig. 4 and 7, the concentric arc sections 431 of the second electrode line 421 cover the gaps 44 between the concentric arc sections 431 connected to the first electrode line 411, so that diffraction phenomena generated by the gaps 44 between the concentric arc sections 431 can be effectively eliminated.

The implementation may use the electrode line structure of the concentric arc segments 431 shown in fig. 3 and 4, or the electrode line structure of the concentric arc segments 431 shown in fig. 6 and 7. In which an electrode lead for applying a driving voltage to the first electrode line 411 and the second electrode line 421 is introduced to the center of the second electrode layer 4 in fig. 6 and 9, and a joint section 432 connected between adjacent concentric arc sections 431 is located at one side of the electrode lead and does not cross the electrode lead.

As shown in fig. 9, as an alternative but advantageous implementation, in this embodiment the first electrode structure 41 includes a first potential distribution line 412 and a plurality of third electrode lines 413, each of which is the segment of one first electrode structure, the first driving voltage loading position and the second driving voltage loading position being disposed on the first potential distribution line 412, one end of the third electrode line 413 being connected to the first potential distribution line 412, and the opposite end being suspended;

When the first driving voltage and the second driving voltage are applied to the first potential distribution line 412 at the first driving voltage applying position and the second driving voltage applying position, respectively, and a certain voltage difference is formed between the first driving voltage and the second driving voltage, the electric potential between the two driving voltage applying positions of the first potential distribution line 412 is distributed in a gradient, and different positions on the first potential distribution line 412 have different electric potentials.

The third electrode lines 413 are in a straight line shape, the plurality of third electrode lines 413 are parallel to the first direction, the positions of the third electrode lines 413 connected with the first potential distribution line 412 are between the first driving voltage loading position and the second driving voltage loading position, and the positions of the different third electrode lines 413 connected with the first potential distribution line 412 are different; since the first potential distribution line 412 has a certain resistance, there is a voltage drop on the potential distribution line, and since the resistances between the connection positions of the respective third electrode lines 413 and the first potential distribution line 412 and the first driving voltage loading positions are different, the potentials at the connection positions of the respective third electrode lines 413 and the first potential distribution line 412 are also different. The potential distribution of the liquid crystal optical device can be controlled by controlling the connection position of the third electrode line 413 to the first potential distribution line 412 and the position through which the third electrode line 413 passes.

As shown in fig. 10, the second electrode structure 42 includes a second electric potential distribution line 422 and a plurality of fourth electrode lines 423, where each fourth electrode line 423 is in a straight line shape, each fourth electrode line is used as the segment of one second electrode structure, the plurality of fourth electrode lines 423 are parallel to the first direction, the third driving voltage loading position and the fourth driving voltage loading position are disposed on the second electric potential distribution line 422, and one end of the fourth electrode line 423 is connected to the first electric potential distribution line 412, and the opposite end is suspended.

The position where the fourth electrode line 423 is connected to the second potential distribution line 422 is between the third driving voltage applying position and the fourth driving voltage applying position, and the position where the fourth electrode line 423 is connected to the second potential distribution line 422 is different. When the third driving voltage and the fourth driving voltage are applied to the third driving voltage applying position and the fourth driving voltage applying position of the second potential distribution line 422, respectively, and a certain voltage difference is formed between the third driving voltage and the fourth driving voltage, the electric potential between the two driving voltage applying positions of the second potential distribution line 422 is distributed in a gradient, and different positions on the second potential distribution line 422 have different electric potentials. Since the second potential distribution line 422 has a certain resistance, there is a voltage drop on the potential distribution line, and since the resistances between the connection positions of the respective fourth electrode lines 423 and the second potential distribution line 422 and the loading positions of the third driving voltages are different, the potentials at the connection positions of the respective fourth electrode lines 423 and the second potential distribution line 422 are also different. The potential distribution of the liquid crystal optical device can be controlled by controlling the position where the fourth electrode line 423 is connected to the second potential distribution line 422 and the position where the third electrode line 413 passes.

As shown in fig. 11, the projection of the fourth electrode line 423 on the plane of the third electrode line 413 covers the gaps 44 between the adjacent third electrode lines 413, and the projection of the third electrode line 413 on the plane of the fourth electrode line 423 covers the gaps 44 between the adjacent fourth electrode lines 423. In particular, the projection of the third electrode line 413 covers the gap 44 between adjacent fourth electrode lines 423, and the projection of the fourth electrode line 423 also covers the gap 44 between adjacent third electrode lines 413.

As an alternative but advantageous embodiment, the resistance value between the position on the first potential distribution line 412 connected to each third electrode line 413 and the first driving voltage applying position and the distance between the position on the second direction at which each third electrode line 413 and the first potential distribution line 412 are connected to the first driving voltage applying position are parabolic in this example. That is, the resistance value between the position where each third electrode line 413 is connected to the first driving voltage application position is set as a first coordinate (y), the distance between the position where the corresponding third electrode line 413 is connected to the first potential distribution line 412 and the first driving voltage application position is set as a second coordinate (x), and the curve obtained in the rectangular coordinate system formed by the first coordinate and the second coordinate is parabolic.

I.e.

Y=kx ², where k is a real number not equal to 0.

The resistance value between the position of each fourth electrode line 423 connected to the third driving voltage distribution line 422 and the distance between the position of each fourth electrode line 423 connected to the second potential distribution line 422 and the third driving voltage distribution line 422 in the second direction are parabolic, that is, the resistance value between the position of each fourth electrode line 423 connected to the third driving voltage distribution line 423 and the third driving voltage distribution line is the first coordinate (y), and the curve obtained by using the distance between the corresponding fourth electrode line 423 connected to the second potential distribution line 422 and the third driving voltage distribution line as the second coordinate (x) is parabolic. The curve obtained in the rectangular coordinate system formed by the first coordinates and the second coordinates is parabolic. I.e. y=kx2, where k is a real number not equal to 0. Wherein the second direction is perpendicular to the first direction.

Since the resistance value between the position on the first potential distribution line 412 to which each third electrode line 413 is connected to the first driving voltage applying position and the distance between the position in the second direction to which each third electrode line 413 is connected to the first driving voltage applying position are parabolic, each third electrode line 413 can form a parabolic electric potential distribution in the surrounding space.

Since the resistance value between the position on the second potential distribution line 422 to which each fourth electrode line 423 is connected to the first driving voltage applying position and the distance between the position in the second direction to which each fourth electrode line 423 is connected to the third driving voltage applying position are parabolic, each fourth electrode line 423 can form a parabolic electric potential distribution in the surrounding space.

After the projections of the first electrode structure 41 and the second electrode structure 42 are covered with each other, not only a high-precision cylindrical lens can be formed, but also diffraction phenomenon can be effectively eliminated.

As an alternative but advantageous embodiment, the first potential distribution line 412 and the second potential distribution line 422 are potential distribution lines with uniform widths in the present embodiment, and the length between the position on the first potential distribution line 412 connected to each third electrode line 413 and the first driving voltage loading position and the distance between the position on the second direction connected to each third electrode line 413 and the first driving voltage loading position are parabolic; the length between the position on the second potential distribution line 422 connected to each fourth electrode line 423 and the first driving voltage applying position is parabolic with the distance between the position on the second direction connected to each fourth electrode line 423 and the third driving voltage applying position.

The first potential distribution line 412 and the second potential distribution line 422 of the present embodiment each use a potential distribution line having a uniform width, so that the resistance values of the respective portions on the first potential distribution line 412 and the second potential distribution line 422 are proportional to the lengths, and thus the potentials controlled by the first electrode structure 41 and the second electrode structure 42 can be made into an accurate parabolic cylinder distribution by controlling the lengths of the first potential distribution line 412 at the connection position of the third electrode line 413 and the first potential distribution line 412 and the lengths of the second potential distribution line 422 at the connection position of the fourth electrode line 423 and the second potential distribution line 422. The width of the third electrode line 413 may be greater than the width of the fourth electrode line 423 in the present embodiment, or may be equal to the width of the fourth electrode line 423. As shown in fig. 12 to 14, the width of the third electrode line 413 may also be smaller than the width of the fourth electrode line 423. The first potential distribution line 412 and the second potential distribution line 422 may be on the same side (see fig. 14) or on different sides (see fig. 15), without limitation.

As shown in fig. 16 and 19, as one example, in the present embodiment the first electrode structure includes a third potential distribution line 414 and a plurality of concentric arc electrode lines 46, each concentric arc electrode line 46 in the first electrode structure being the segment of one first electrode structure, the third potential distribution line 414 extending from a position of a center of the liquid crystal lens toward a position of an edge of the liquid crystal lens, opposite ends of the third potential distribution line 414 being a first driving voltage loading position and a second driving voltage loading position, respectively;

As shown in fig. 17 and 20, the second electrode structure includes a fourth potential distribution line 424 and a plurality of concentric arc electrode lines 46, each concentric arc electrode line 46 in the second electrode structure 42 is used as a segment of a first electrode, the fourth potential distribution line 424 extends from the position of the center of the liquid crystal lens towards the position of the edge of the liquid crystal lens, and two opposite ends of the fourth potential distribution line 424 are respectively a third driving voltage loading position and a fourth driving voltage loading position;

As shown in fig. 18, 21 and 22, the projection of the concentric arc electrode lines 46 in the first electrode structure onto the plane of the second electrode structure covers the projection between two adjacent concentric arc electrode lines 46 in the second electrode structure. When a parabolic potential distribution needs to be formed, in this embodiment, one end of the concentric arc electrode line 46 is connected to the potential distribution line, the other end is suspended, and if the position where the first potential distribution line is connected to each arc electrode line is set as a potential extraction position, a resistance value between each potential extraction position of the first potential distribution line and the first driving voltage loading position and a distance from each potential extraction position to the first driving voltage loading position along the radial direction of the liquid crystal lens are in parabolic distribution.

In order to obtain a large-caliber liquid crystal lens and reduce the pressure difference between driving voltages, as shown in fig. 22 to 26, the liquid crystal optical device of the present embodiment may be configured as a liquid crystal fresnel lens, which is an alternative but advantageous implementation manner, as shown in fig. 22, in the present embodiment, the first electrode structure 41 includes a plurality of first electrode units sequentially arranged from the center to the edge of the second electrode layer 4, and the surface electrode and each of the electrode units deflect the liquid crystal in the liquid crystal layer 3 to form the liquid crystal fresnel lens under the driving of the first driving voltage and the second driving voltage;

As shown in fig. 23, the second electrode structure 42 includes a plurality of first electrode units sequentially arranged from the center to the edge of the second electrode layer 4, and the surface electrode and each of the first electrode units deflect the liquid crystal in the liquid crystal layer 3 to form a liquid crystal fresnel lens under the driving of the third driving voltage and the fourth driving voltage. Wherein each first electrode unit controls the deflection of the liquid crystal material in one zone area, so that the delay effect of the deflected liquid crystal material on the phase of the passed light is the same as that of one zone of the Fresnel lens, and the liquid crystal material deflects to form the liquid crystal Fresnel lens under the combined action of all the first electrode units.

As an alternative but advantageous embodiment, the first electrode structure 41 in this example comprises a plurality of second electrode units arranged along a first direction, the surface electrode and each of the electrode units deflecting the liquid crystal in the liquid crystal layer 3 under the drive of the first and second drive voltages to form a liquid crystal fresnel column lens; the second electrode structure 42 includes a plurality of second electrode units arranged along the first direction, and the surface electrode and each of the second electrode units deflect the liquid crystal in the liquid crystal layer 3 to form a liquid crystal fresnel column lens under the driving of the third driving voltage and the fourth driving voltage.

The liquid crystal Fresnel column lens formed by adopting the structure has high potential distribution precision and can effectively eliminate diffraction phenomenon. The effect on the electric potential distribution with the liquid crystal lens in the present embodiment can be seen from fig. 27, 28 and 29.

Example 2

The present embodiment provides an electronic product including a control circuit and the liquid crystal optical device described in embodiment 1, the control circuit being electrically connected to the liquid crystal optical device. 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, and the like.

In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.

Claims (11)

1. The liquid crystal optical device is characterized by comprising a first substrate, a first electrode layer, a liquid crystal layer, a second electrode layer and a second substrate which are sequentially stacked;

The second electrode layer comprises an insulating layer, a first electrode structure and a second electrode structure, one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing the liquid crystal layer, the other one of the first electrode structure and the second electrode structure is positioned on one surface of the insulating layer facing away from the liquid crystal layer, a first driving voltage loading position and a second driving voltage loading position are arranged on the first electrode structure, the first driving voltage loading position is used for receiving a first driving voltage, the second driving voltage loading position is used for receiving a second driving voltage, the first driving voltage is different from the second driving voltage, a third driving voltage loading position and a fourth driving voltage loading position are arranged on the second electrode structure, the third driving voltage loading position is used for receiving a third driving voltage, the fourth driving voltage loading position is used for receiving a fourth driving voltage, and the third driving voltage and the fourth driving voltage are different;

The first electrode structure comprises at least two segments, a gap is reserved between at least a part of adjacent segments in the first electrode structure, the second electrode structure comprises at least two segments, a gap is reserved between at least a part of adjacent segments in the second electrode structure, the projection of the second electrode structure on the plane of the first electrode structure completely or partially covers the gap between the adjacent segments of the first electrode structure, and the projection of the first electrode structure on the plane of the second electrode structure completely or partially covers the gap between the adjacent segments of the second electrode structure;

The first electrode layer is provided with a third electrode structure.

2. The liquid crystal optic of claim 1, wherein a projection of the first electrode structure onto a plane in which the second electrode structure lies coincides with a gap between adjacent segments of the second electrode structure.

3. A liquid crystal optical device according to claim 1 or 2, wherein the first electrode structure comprises a first electrode line extending from one end near the center of the second electrode layer towards one end near the edge of the second electrode layer, one end of the first electrode line being for receiving a first driving voltage and the opposite end being for receiving a second driving voltage;

the second electrode structure comprises a second electrode wire extending from one end close to the center of the second electrode layer to one end close to the edge of the second electrode layer, wherein one end of the second electrode wire is used for receiving a third driving voltage, and the other opposite end is used for receiving a fourth driving voltage.

4. A liquid crystal optical device according to claim 3, wherein the first electrode wire comprises a plurality of concentric arc sections with different radiuses, each concentric arc section in the first electrode wire is used as the segment of one first electrode structure, a gap is arranged between adjacent concentric arc sections in the first electrode wire, and adjacent concentric arc sections in the first electrode wire are connected through a connecting section; the second electrode wire comprises a plurality of concentric arc sections with different radiuses, each concentric arc section in the second electrode wire is used as the section of a second electrode structure, a gap is arranged between every two adjacent concentric arc sections in the second electrode wire, and every two adjacent concentric arc sections in the second electrode wire are connected through a connecting section.

5. A liquid crystal optical device according to claim 1 or 2, wherein the first electrode structure comprises a first potential distribution line and a plurality of third electrode lines, each third electrode line being the segment of one first electrode structure, the third electrode lines being in a straight line shape, the plurality of third electrode lines each being parallel to the first direction, the first and second driving voltage loading positions being provided on the first potential distribution line, one end of the third electrode line being connected to the first potential distribution line and the opposite end being suspended;

The position where the third electrode wire is connected with the first potential distribution wire is between a first driving voltage loading position and a second driving voltage loading position, and the positions where different third electrode wires are connected with the first potential distribution wire are different;

The second electrode structure comprises a second potential distribution line and a plurality of fourth electrode lines, each fourth electrode line is used as the segment of one second electrode structure, the fourth electrode lines are in a straight line shape, the plurality of fourth electrode lines are parallel to the first direction, the third driving voltage loading position and the fourth driving voltage loading position are arranged on the second potential distribution line, one end of each fourth electrode line is connected with the second potential distribution line, and the other opposite end of each fourth electrode line is suspended;

The position where the fourth electrode wire is connected with the second potential distribution wire is located between a third driving voltage loading position and a fourth driving voltage loading position, the positions where different fourth electrode wires are connected with the second potential distribution wire are different, the projection of the fourth electrode wire on the plane where the third electrode wire is located covers the gap between the adjacent third electrode wires, and the projection of the third electrode wire on the plane where the fourth electrode wire is located covers the gap between the adjacent fourth electrode wires.

6. The liquid crystal optical device according to claim 5, wherein a resistance value between a position on the first potential distribution line connected to each third electrode line and a first driving voltage applying position and a distance between a position on the second direction at which each third electrode line and the first potential distribution line are connected to the first driving voltage applying position are parabolic;

The resistance value between the position, connected with each fourth electrode wire, on the second potential distribution wire and the third driving voltage loading position is parabolic, and the distance between the position, connected with each fourth electrode wire and the second potential distribution wire, on the second direction and the third driving voltage loading position is parabolic, and the second direction and the first direction are mutually perpendicular.

7. The liquid crystal optical device according to claim 6, wherein the first potential distribution line and the second potential distribution line are potential distribution lines having a uniform width, and a length between a position on the first potential distribution line connected to each third electrode line and a first driving voltage application position and a distance between a position on the second direction connected to each third electrode line and the first driving voltage application position are parabolic;

The length between the position on the second electric potential distribution line connected with each fourth electrode line and the first driving voltage loading position and the distance between the position on the second direction connected with each fourth electrode line and the third driving voltage loading position are parabolic.

8. A liquid crystal optical device according to claim 1 or 2, wherein the first electrode structure comprises a third potential distribution line and a plurality of concentric arc electrode lines, each concentric arc electrode line in the first electrode structure serving as the segment of one first electrode structure, the third potential distribution line extending from a position of a center of the liquid crystal lens towards a position of an edge of the liquid crystal lens, opposite ends of the third potential distribution line being a first driving voltage loading position and a second driving voltage loading position, respectively;

The second electrode structure comprises a fourth potential distribution line and a plurality of concentric arc electrode lines, each concentric arc electrode line in the second electrode structure serves as a second electrode structure section, the fourth potential distribution line extends from the position of the center of the liquid crystal lens to the position of the edge of the liquid crystal lens, and two opposite ends of the fourth potential distribution line are respectively a third driving voltage loading position and a fourth driving voltage loading position.

9. The liquid crystal optical device according to claim 1, wherein the first electrode structure comprises a plurality of first electrode units sequentially arranged from the center to the edge of the second electrode layer, and each electrode unit deflects liquid crystal in the liquid crystal layer to form a liquid crystal fresnel lens under the driving of the first driving voltage and the second driving voltage;

the second electrode structure comprises a plurality of first electrode units which are sequentially arranged from the center of the second electrode layer to the edge, and the first electrode units deflect liquid crystals in the liquid crystal layer to form a liquid crystal Fresnel lens under the driving of the third driving voltage and the fourth driving voltage.

10. The liquid crystal optical device of claim 1, wherein the first electrode structure comprises a plurality of second electrode units arranged along a first direction, each of the electrode units deflecting liquid crystal in the liquid crystal layer under the drive of the first and second drive voltages to form a liquid crystal fresnel column lens;

The second electrode structure comprises a plurality of second electrode units which are arranged along the first direction, and the second electrode units deflect liquid crystals in the liquid crystal layer to form liquid crystal Fresnel column lenses under the driving of the third driving voltage and the fourth driving voltage.

11. An electronic product comprising a control circuit and the liquid crystal optical device of any one of claims 1 to 10, the control circuit being electrically connected to the liquid crystal optical device.