CN117572692A - Fresnel liquid crystal lens and electronic product - Google Patents
Fresnel liquid crystal lens and electronic product Download PDFInfo
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- CN117572692A CN117572692A CN202311329846.5A CN202311329846A CN117572692A CN 117572692 A CN117572692 A CN 117572692A CN 202311329846 A CN202311329846 A CN 202311329846A CN 117572692 A CN117572692 A CN 117572692A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 112
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 238000009826 distribution Methods 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 17
- 230000003287 optical effect Effects 0.000 description 16
- 230000004044 response Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000007792 addition Methods 0.000 description 1
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- 238000012634 optical imaging Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/294—Variable focal length devices
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention belongs to the technical field of liquid crystal lenses, and particularly relates to a Fresnel liquid crystal lens and an electronic product. The Fresnel liquid crystal lens comprises a first transparent substrate, a first electrode layer, a first orientation layer, a liquid crystal layer, a second orientation layer, a second electrode layer and a second transparent substrate which are sequentially laminated; the second electrode layer includes a plurality of electrode units; the electrode unit comprises a first conductive wire and a plurality of second conductive wires, wherein the first conductive wire comprises a first position and a second position, the first position and the second position are different, the first position is used for receiving a first driving voltage, and the second position is used for receiving a second driving voltage; one end of the second conductive wire is connected with the first conductive wire, the opposite end is suspended, and the connection position of the second conductive wire and the first conductive wire is a lead-out position. The invention can improve the utilization rate of the liquid crystal material.
Description
Technical Field
The invention belongs to the technical field of liquid crystal lenses, and particularly relates to a Fresnel liquid crystal lens and an electronic product.
Background
When the aperture of the liquid crystal lens is large, the required driving voltage may be high. In the prior art, a Fresnel liquid crystal lens is designed by utilizing the principle of the Fresnel lens. Since the phase of the liquid crystal material is linearly responsive to the applied voltage over a certain voltage interval, this voltage interval is referred to as the linear response interval or the liquid crystal linear operation interval. In order to facilitate accurate control of the potential distribution of the liquid crystal layer, it has been proposed in the prior art to control the voltage driving the liquid crystal lens in accordance with the range of the linear response interval. For example, in the patent publication No. CN114185222a, the liquid crystal device is driven to operate in such a manner that the minimum voltage and the maximum voltage for driving the liquid crystal device are set within the liquid crystal linear operation region. As shown in the response curve of the liquid crystal material in fig. 1, although the driving voltage is selected in the linear response interval, the liquid crystal lens can be conveniently and accurately driven to work, the voltage range in the linear response interval is smaller, so that the optical power of the designed fresnel liquid crystal device is insufficient, and the application range of the fresnel liquid crystal lens is greatly limited.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a fresnel liquid crystal lens, a device, an apparatus, and a storage medium, which are used for solving the technical problem that the optical power of a liquid crystal cylindrical lens is insufficient due to a small linear response interval range of a liquid crystal material.
The technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a fresnel liquid crystal lens, comprising a first transparent substrate, a first electrode layer, a first alignment layer, a liquid crystal layer, a second alignment layer, a second electrode layer and a second transparent substrate which are sequentially stacked;
the first electrode layer is a surface electrode;
the second electrode layer comprises a plurality of electrode units which are sequentially arranged from a position close to the center of the second electrode layer to a position far from the center of the second electrode layer;
the electrode unit comprises a first conductive wire and a plurality of second conductive wires, the first conductive wire comprises a first position and a second position, the first position and the second position are different, the part of the first conductive wire between the first position and the second position has the same width, the first position is used for receiving a first driving voltage, and the second position is used for receiving a second driving voltage;
one end of the second conductive wire is connected with the first conductive wire, the opposite end is suspended, the position where the second conductive wire is connected with the first conductive wire is a lead-out position, at least a part of the lead-out positions are positioned between the first position and the second position of the first conductive wire, and at least two lead-out positions are different;
the first conducting wire comprises a plurality of extension sections, a first connection section and a second connection section, wherein two adjacent extension sections are connected through the first connection section or the second connection section, the extension sections are sequentially arranged from the center of the second electrode layer to the direction away from the center of the second electrode layer, the extension sections extend from a starting position to a position connected with the first connection section, the extraction position is arranged at the position where the extension sections are connected with the first connection section, and the starting position of the extension sections is connected with the second connection section.
For any one of the electrode units, if the distance x in the radial direction between the starting position of the extension and the first position of the electrode unit is set, the length of the extension is g (x), whereinC is a constant (L)>Indicating the rate of change of the phase of the liquid crystal material with respect to the change of voltage.
Preferably, each electrode unit in the second electrode layer corresponds to at least one fresnel zone; when the electrode units are loaded with a first driving voltage and a second driving voltage, the electric potential generated by the second conductive wires of the electrode units enables liquid crystals in the liquid crystal layer to form phase distribution equivalent to a Fresnel zone corresponding to the electrode units.
Preferably, the second conductive line is circular arc-shaped.
Preferably, the extension section of the first conductive wire is arc-shaped.
Preferably, the start position and the exit position of at least one of the plurality of extension segments are connected to two adjacent extension segments by a first connection segment and a second connection segment, respectively.
Preferably, the electrode lead group further comprises an electrode lead group, the electrode lead group comprises a first electrode lead and a second electrode lead, the first electrode lead and the second electrode lead are extended from the center of the second electrode layer towards the direction far away from the second electrode layer, one end of the first electrode lead is connected with a first driving voltage, the other end of the first electrode lead is electrically connected with a first position of a first conductive wire, one end of the second electrode lead is connected with a second driving voltage, the other end of the second electrode lead is electrically connected with a second position of the first conductive wire, and the starting position of the extension section and the suspended end of the second conductive wire are respectively located on two opposite sides of the first electrode lead.
Preferably, the electrode lead set further includes a third electrode lead extending from the second position of the first conductive line to a position connected to the second electrode lead in a radial direction of the liquid crystal lens.
Preferably, a distance between adjacent second conductive lines is 100 μm or less.
Preferably, a high-resistance film or a high-dielectric constant layer is disposed between the second electrode layer and the second alignment layer or between the second electrode layer and the second transparent substrate.
In a second aspect, the present invention provides an electronic product, including a control circuit and the fresnel liquid crystal lens according to the first aspect, where the control circuit is electrically connected to the fresnel liquid crystal lens.
The beneficial effects are that: according to the Fresnel liquid crystal lens and the electronic product, the first conducting wires capable of loading two driving voltages in the electrode units are utilized to generate the first conducting wires which are distributed along with the positions of the conducting wiresThe same potential is adopted, a plurality of second conductive wires are led out from different positions of the non-conductive wires respectively, and one end of each second conductive wire is connected with the corresponding conductive wire, and the other opposite end of each second conductive wire is suspended, so that the second conductive wires can diffuse the potential of the leading-out position of the corresponding first conductive wire to the extending area of the leading-out wire. On the basis of the structure, the distance x between the starting position of the extension section and the center of the second electrode layer and the length g (x) of the extension section are set to satisfyC is a constant (L)>Indicating the rate of change of the phase of the liquid crystal material with respect to the change of voltage. Thus, even if the first driving voltage V1 loaded at the first position and the second driving voltage V2 loaded at the second position are not in the linear response area of the liquid crystal material, the electrode unit can accurately realize parabolic distribution of the phase of the liquid crystal material. Because the plurality of electrode units are sequentially arranged from the position close to the center of the second electrode layer to the position far from the center of the second electrode layer, the electrode units can realize the equivalent optical effect of the complete Fresnel lens. The application of the liquid crystal material is not limited by the linear response interval of the liquid crystal material after the scheme of the invention is adopted, so that the optical power of the liquid crystal cylindrical lens is greatly improved while the phase distribution precision is improved, and the utilization rate of the liquid crystal material is also obviously increased.
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 response graph of a liquid crystal material;
FIG. 2 is a cross-sectional view of a Fresnel liquid crystal lens of the present invention;
FIG. 3 is a schematic diagram of a second electrode layer according to the present invention;
FIG. 4 is a schematic diagram showing the phase distribution of a liquid crystal material corresponding to a Fresnel zone in the present invention;
FIG. 5 is a schematic view of an electrode unit near the center of the second electrode layer according to the present invention;
FIG. 6 is a schematic structural diagram of an electrode unit located at the periphery of a second electrode layer according to the present invention;
FIG. 7 is a schematic view of a first conductive line according to the present invention;
FIG. 8 is a schematic view of a partial structure of a first conductive line according to the present invention;
reference numerals illustrate:
parts and numbers in the figure:
the first transparent substrate 10, the first electrode layer 20, the first alignment layer 30, the liquid crystal layer 40, the second alignment layer 50, the second electrode layer 60, the electrode unit 61, the first conductive line 611, the first position 6111, the second position 6112, the extension segment 6113, the first connection segment 6114, the second connection segment 6115, the lead-out position 6116, the start position 6117, the second conductive line 612, the first electrode lead 613, the second electrode lead 614, the third electrode lead 615, and the second transparent substrate 70.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. 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 invention, 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 description of 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 invention. 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 invention and the features of the embodiments may be combined with each other, which are all within the protection scope of the present invention.
Example 1
As shown in fig. 2, the present embodiment provides a fresnel liquid crystal lens, which includes a first transparent substrate 10, a first electrode layer 20, a first alignment layer 30, a liquid crystal layer 40, a second alignment layer 50, a second electrode layer 60, and a second transparent substrate 70, which are sequentially stacked;
the fresnel lens in this embodiment may have a layered structure. The liquid crystal layer 40, the first alignment layer 30, the second alignment layer 50, the first electrode layer 20, the second electrode layer 60, the first transparent substrate 10 and the second transparent substrate 70 are respectively located in different layers, and the layers are stacked and arranged along the light transmission direction of the liquid crystal optical device, that is, along the normal direction of the layers. The arrangement may be as shown in fig. 2, and in fig. 2, the first transparent substrate 10, the first electrode layer 20, the first alignment layer 30, the liquid crystal layer 40, the second alignment layer 50, the second electrode layer 60, and the second transparent substrate 70 are sequentially arranged from bottom to top along the light passing direction of the liquid crystal optical device. Namely, the first alignment layer 30 and the second alignment layer 50 are respectively positioned on two opposite sides of the liquid crystal layer 40, the first electrode layer 20 is positioned on one side of the first alignment layer 30 facing away from the liquid crystal layer 40, and the second electrode layer 60 is positioned on one side of the second alignment layer 50 facing away from the liquid crystal layer 40; the first transparent substrate 10 is located at a side of the first electrode layer 20 facing away from the liquid crystal layer 40, and the second transparent substrate 70 is located at a side of the second electrode layer 60 facing away from the liquid crystal layer 40;
wherein the first transparent substrate 10 and the second transparent substrate 70 may be made of a transparent material having a certain strength and rigidity, such as a glass substrate, a plastic substrate, etc. Wherein the first substrate may function to support the liquid crystal optical device. Wherein the first transparent substrate 10 may serve as a carrier for the first electrode layer 20, the first electrode layer 20 may be plated on the first substrate. The second substrate also serves as a support, and may also serve as a carrier for the second electrode layer 60, and the second electrode layer 60 may be plated on the second transparent substrate 70.
Wherein the first electrode layer 20 is a planar electrode, the present embodiment forms an equipotential plane with the first electrode layer 20.
As shown in fig. 3, in the present embodiment, the second electrode layer 60 includes a plurality of electrode units 61, and the plurality of electrode units 61 are sequentially arranged from a position close to the center of the second electrode layer 60 to a position far from the center of the second electrode layer 60;
the plurality of electrode units 61 means that the number of electrode units 61 in the second electrode layer 60 is 2 or more. These electrode units 61 are substantially in the shape of concentric endless belts, and are arranged sequentially from the center outward on the second electrode layer 60.
As shown in fig. 5, for one of the electrode units 61, the electrode unit includes mainly a first conductive line 611 and a plurality of second conductive lines 612, the first conductive line 611 includes a first position 6111 and a second position 6112, the first position 6111 and the second position 6112 are different, a portion of the first conductive line 611 between the first position 6111 and the second position 6112 has the same width, the first position 6111 is used for receiving a first driving voltage, and the second position 6112 is used for receiving a second driving voltage;
the first conductive line 611 and the second conductive line 612 in this embodiment include, but are not limited to, a conductive line having a certain resistance, a thin line plated on the transparent second substrate having a certain resistance and being conductive. In order to improve the lens effect, the conductive wires in this embodiment may be made of transparent conductive materials, including but not limited to ITO electrode materials, IZO electrode materials, FTO electrode materials, AZO electrode materials, IGZO electrode materials, and the like.
As shown in fig. 3, 6 and 7, in the present embodiment, a first driving voltage is applied to a first position 6111 on a first conductive line 611, a second driving voltage is applied to a second position 6112 on the first conductive line 611, and the first driving voltage and the second driving voltage are applied to the first conductive line 611 at different positions because the first position 6111 and the second position 6112 are different.
When the first position 6111 and the second position 6112 on the first conductive line 611 are respectively applied with the two driving voltages, a potential having a magnitude distributed along the position of the first conductive line 611 can be formed on the first conductive line 611 between the two positions.
As shown in fig. 5 and fig. 6, one end of the second conductive wire 612 is connected to the first conductive wire 611, the opposite end is suspended, the position where the second conductive wire 612 is connected to the first conductive wire 611 is an extraction position 6116, at least a part of the extraction positions 6116 are located between a first position 6111 and a second position 6112 of the first conductive wire 611, and at least two extraction positions 6116 are different;
since the second conductive wire 612 in this embodiment adopts a connection mode that one end is connected to the first conductive wire 611 and the opposite end is suspended, the electric potential at each position on the same second conductive wire 612 is equal to the electric potential of the first conductive wire 611 at the position where the second conductive wire 612 is connected to the first conductive wire 611. Also, since the width of the portion of the first conductive line 611 between the first position 6111 and the second position 6112 is the same in the present embodiment, the potential of each of the lead-out positions 6116 on the first conductive line 611 is linearly dependent on the length of the first conductive line 611 from the position to the first position 6111.
As shown in fig. 8, the first conductive wire 611 includes a plurality of extending segments 6113, a first connecting segment 6114 and a second connecting segment 6115, two adjacent extending segments 6113 are connected through the first connecting segment 6114 or the second connecting segment 6115, the plurality of extending segments 6113 are sequentially arranged from a direction close to the center of the second electrode layer 60 to a direction far away from the center of the second electrode layer 60, the extending segments 6113 extend from a start position 6117 to a position connected with the first connecting segment 6114, the lead-out position 6116 is set at a position where the extending segments 6113 are connected with the first connecting segment 6114, and the start position 6117 of the extending segments 6113 is connected with the second connecting segment 6115. In the present embodiment, the aforementioned plurality of extension segments 6113 are arranged in the radial direction of the fresnel lens, so that the electric potential distribution at each radial position of the fresnel lens can be controlled using electric potentials at different extension segments 6113. The end of the starting position 6117 of each extension 6113 is connected by a first connection 6114, while the end of each extension 6113 remote from the starting position 6117 is connected by a second connection 6115, so that each extension 6113 can be connected end to form a potential distribution under the application of a first driving voltage and a second driving voltage.
For any one of the electrode units, if the distance between the starting position of the extension section and the first position of the electrode unit in the radial direction is x, the length of the extension section 6113 is g (x), whereinC is a constant value, and the C is a constant value,indicating the rate of change of the phase of the liquid crystal material with respect to the change of voltage.
In this embodiment, the length L of the extension segment 6113 in the electrode unit is set to be related to the distance between the starting position 6117 of the extension segment 6113 and the first position of the electrode unit in the radial direction, specifically, the distance x between the starting position of the extension segment and the first position of the electrode unit in the radial direction may satisfy a certain functional relationship, and for convenience of description, the functional relationship satisfied by the distance x between the starting position of the extension segment and the first position of the electrode unit in the radial direction is denoted as g (x). For easy understanding, the length L of the extension 6113 can also be expressed by a rectangular coordinate system between the starting position of the extension and the first position of the electrode unitRelationship between distances x in the radial direction. We can set up a rectangular coordinate system with the distance between the starting position 6117 of the extension 6113 and the first position of the electrode unit in the radial direction as the x-axis of the rectangular coordinate system and the length L of the extension 6113 as the y-axis, then y=g (x) is satisfied in the rectangular coordinate system. Wherein the method comprises the steps ofC is a constant (L)>Indicating the rate of change of the phase of the liquid crystal material with respect to the change of voltage.
For one electrode unit 61 in the fresnel liquid crystal lens, assuming that the first driving voltage applied at the first position 6111 is V1 and the second driving voltage applied at the second position 6112 is V2, the rate of change of the phase along the x-direction is:
because of
So that
Then
The phase distribution is
When the phase is parabolic along the x-axis
Thus (2)
I.e. when meeting
When the phase distribution of the liquid crystal material in this embodiment satisfies the parabolic distribution.
Wherein the method comprises the steps ofThe change rate of the liquid crystal phase with voltage is shown, and the response curve shown in fig. 1 is reflected on the slope of the response curve. It can also be seen from the foregoing that the slope of the curve g (x) is proportional to the inverse of the slope of the response curve.
With respect to one electrode unit 61, since the potential of each second wire can be precisely controlled by the lead-out position 6116 thereof, the position where the second wire passes through in the second liquid crystal layer 40 can be precisely controlled when g (x) satisfiesIn this case, an accurate potential distribution that enables parabolic distribution of the phase of the liquid crystal material in the radial direction can be obtained.
Since the optical effects of different fresnel zones in the same fresnel lens may be different, the optical effects of each fresnel zone in different designs of fresnel lenses may also be different, so that the parabolic shapes of the parabolic distributions satisfied by the liquid crystal material of each fresnel zone in the liquid crystal fresnel lens are different. For example, the width of the parabola satisfied by the liquid crystal material of the fresnel zone in the center portion is wider, the slope is smaller, and the width of the parabola satisfied by the liquid crystal material of the fresnel zone in the peripheral portion is more loaded, and the slope is larger.
The constant C in the functional relation g (x) satisfied for each electrode unit 61 is also different, for example, the constant C in the center portion electrode unit g (x) is smaller and the constant C in the peripheral portion electrode unit g (x) is larger. Thus, different constants C may be set according to the parabolic shapes of the fresnel zones corresponding to the equivalent effect, so that the phase distribution of the liquid crystal material in this embodiment satisfies the corresponding parabolic distribution, which is not limited here.
As shown in fig. 4, in the present embodiment, each electrode unit 61 in the second electrode layer 60 corresponds to at least one fresnel zone; when the electrode unit 61 is applied with the first driving voltage and the second driving voltage, the electric potential generated by the second conductive wire 612 of the electrode unit 61 causes the liquid crystal in the liquid crystal layer 40 to form a phase distribution equivalent to the fresnel zone corresponding to the electrode unit 61.
For example, in fig. 4, two electrode units 61 are included, each electrode unit 61 corresponds to a fresnel zone, the curve below the electrode unit 61 in fig. 4 represents the phase distribution of the liquid crystal material corresponding to the electrode unit 61, wherein the abscissa of the curve represents the position of the liquid crystal material along the radial direction of the fresnel liquid crystal lens, and the ordinate of the curve represents the phase of the liquid crystal material.
According to the design and processing principle of the Fresnel lens, the curvature of the optical surface in optical imaging determines imaging characteristics, the curvature of the surface of the Fresnel lens can be kept unchanged in the design of the optical lens, but the thickness of the Fresnel lens is reduced in the processing process, and the Fresnel lens still has a converging effect on light rays and can focus the light rays incident on the Fresnel lens to a focus. In the actual processing and application of the lens, the spherical lens can be regarded as a plurality of discontinuous split bodies, and redundant parts among the split bodies are removed, but the original curvature of the surface of the spherical lens is kept unchanged in the processing process, the deflection of light rays is not affected, and the functions of the plurality of discontinuous split bodies are realized by a series of Fresnel zones on the Fresnel lens. The present embodiment can also realize an effect equivalent to that of a fresnel lens using a liquid crystal lens. Since the conventional fresnel lens has a series of fresnel zones, the present embodiment uses the respective electrode units 61 to correspondingly realize the optical effects of the respective fresnel zones in the fresnel lens. The effect achieved by all the electrode units 61 is combined to be equivalent to the overall optical effect of one fresnel lens.
The phase distribution equivalent to the fresnel zone here means that the modulation effect on the light after the liquid crystal layer 40 forms the aforementioned phase distribution is equivalent to the corresponding modulation effect on the light by the corresponding fresnel zone.
As shown in fig. 4, the present embodiment uses the lengths of the extending sections 6113 in the electrode unit 61 at different positions in the radial direction to satisfy the aforementioned functional relationship to make the electric potential of the extraction position 6116 in the radial direction a specific distribution, and this electric potential distribution satisfies the parabolic distribution of the phase distribution of the liquid crystal material in the radial direction. Since the electric potential on the upper portions of the second conductive lines 612 is equal to the electric potential of the lead-out position 6116, the electric potential distribution of the aforementioned characteristics extends to the respective circumferential positions of the fresnel liquid crystal lens along with the second conductive lines 612, thereby realizing the optical effects of the corresponding fresnel zones.
The second electrode layer 60 of the present embodiment adopts the foregoing structure, and only two driving voltages, namely the first driving voltage and the second driving voltage, are required to achieve accurate control of the electric potential at each position of the fresnel zone corresponding to the electrode unit 61, so that the present embodiment can obtain the fresnel lens with better effect by a simple driving manner.
In addition, since the fresnel liquid crystal lens in the present embodiment adopts the aforementioned electrode structure, the present embodiment can accurately implement parabolic distribution of the phase of the liquid crystal material even if the first driving voltage V1 applied to the first position 6111 and the second driving voltage V2 applied to the second position 6112 are not within the linear response region of the liquid crystal material. Therefore, the application of the liquid crystal material is not limited by the linear response interval of the liquid crystal material, so that the focal power of the Fresnel liquid crystal lens is greatly improved while the phase distribution precision is improved, and the utilization rate of the liquid crystal material is also obviously increased.
In this embodiment, as an alternative but advantageous implementation, the second conductive line 612 is in a circular arc shape. For one electrode unit 61, different second conductive wires 612 are led out from different lead-out positions 6116, and these second conductive wires are arranged from inside to outside along the radial direction of the fresnel liquid crystal lens. Each of the second conductors may be in the shape of a segment of circular arcs, which may be concentric circular arcs. When the second conductive wire 612 is in the shape of a circular arc, the electrode units 61 can achieve the effect of a circular fresnel zone, and all the electrode units 61 can achieve the optical effect of a circular fresnel lens after being combined.
As an alternative but advantageous embodiment, in this example, the extension 6113 of the first conductive wire 611 is circular arc shaped. The extension segments 6113 of the first conductive wires 611 are arranged from inside to outside along the radial direction of the fresnel liquid crystal lens, and each of the second conductive wires 612 may be in the shape of a segment of circular arc, which may be concentric circular arcs. The length of the extension 6113 is set by the radius at which the circular arc can be set after the foregoing structure is adopted, so that the design and fabrication of the second electrode layer 60 can be simplified.
As an alternative but advantageous embodiment, the electrode lead set further comprises a first electrode lead 613 and a second electrode lead 614 extending from the center of the second electrode layer 60 toward the direction away from the second electrode layer 60, wherein one end of the first electrode lead 613 is connected to the first driving voltage, the other end is electrically connected to the first position 6111 of the first conductive wire 611, one end of the second electrode lead 614 is connected to the second driving voltage, the other end is electrically connected to the second position 6112 of the first conductive wire 611, and the starting position 6117 of the extension segment 6113 and the suspended end of the second conductive wire 612 are located at opposite sides of the first electrode lead 613, respectively.
In order to facilitate loading the fresnel liquid crystal lens with the driving voltage, the present embodiment provides that the first electrode lead 613 and the second electrode lead 614 introduce the first driving voltage and the second driving voltage to the first position 6111 and the second position 6112 of the first conductive line 611, respectively. Both the first electrode lead 613 and the second electrode lead 614 are led out from the inside to the outside. The outer ends of the first electrode lead 613 and the second electrode lead 614 may be connected to a power source of the liquid crystal fresnel lens. In this embodiment, the starting position 6117 of the extension segment 6113 and the suspended end of the second conductive wire 612 are respectively disposed on two opposite sides of the first electrode lead 613, so that the first electrode wire can enter a position close to the center of the liquid crystal fresnel lens, and is electrically connected to the first position 6111 of the electrode unit 61 close to the fresnel center. With the foregoing structure, the first electrode lead 613 and the second electrode lead 614 may be led out from the gap between the start position 6117 of each extension 6113 and the suspended end of each second conductive wire 612, so as to be connected to a power source.
As an alternative but advantageous implementation in this embodiment, the electrode lead set further comprises a third electrode lead 615, said third electrode lead 615 extending from the second position 6112 of the first conductive wire 611 to a position connected to the second electrode lead 614 in the radial direction of the liquid crystal lens. Since the second position 6112 of the first conductive wire 611 may be far from the second electrode lead 614, the present embodiment connects the second position 6112 located at one side of the first electrode lead 613 with the second electrode lead 614 located at the other side of the first electrode lead 613 by providing the third electrode lead 615.
As an alternative but advantageous embodiment, the spacing between adjacent second conductive lines 612 is 100 μm or less. A more accurate potential distribution can be obtained in the case where the pitch between the adjacent second conductive lines 612 is 100 μm or less.
As shown in fig. 3, the aforementioned interval between adjacent second conductive lines 612 refers to the interval between two adjacent second conductive lines 612 in the radial direction of the fresnel liquid crystal lens, i.e., the distance d in the figure. As an alternative but advantageous embodiment, the spacing between adjacent stretches 6113 is 100 μm or less.
As an alternative but advantageous embodiment, a high-resistance film or a high dielectric constant layer is provided between the second electrode layer 60 and the second alignment layer or between the second electrode layer 60 and the second transparent substrate in this example. The present embodiment makes the electric potential between the adjacent lead wires smoother by adding a high-resistance film or a high-dielectric constant layer.
Example 2
The present embodiment provides an electronic product including a control circuit and the fresnel liquid crystal lens described in embodiment 1, the control circuit being electrically connected to the fresnel liquid crystal lens. 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.
The above is a detailed description of the fresnel liquid crystal lens and the electronic product provided by the embodiments of the present invention.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
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 (10)
1. The Fresnel liquid crystal lens is characterized by comprising a first transparent substrate, a first electrode layer, a first orientation layer, a liquid crystal layer, a second orientation layer, a second electrode layer and a second transparent substrate which are sequentially laminated;
the first electrode layer is a surface electrode;
the second electrode layer comprises a plurality of electrode units which are sequentially arranged from a position close to the center of the second electrode layer to a position far from the center of the second electrode layer;
the electrode unit comprises a first conductive wire and a plurality of second conductive wires, the first conductive wire comprises a first position and a second position, the first position and the second position are different, the part of the first conductive wire between the first position and the second position has the same width, the first position is used for receiving a first driving voltage, and the second position is used for receiving a second driving voltage;
one end of the second conductive wire is connected with the first conductive wire, the opposite end is suspended, the connection position of the first conductive wire and the second conductive wire is a lead-out position, at least a part of the lead-out positions are positioned between the first position and the second position of the first conductive wire, and at least two lead-out positions are different;
the first conducting wire comprises a plurality of extension sections, a first connection section and a second connection section, wherein two adjacent extension sections are connected through the first connection section or the second connection section, the extension sections are sequentially arranged from the center of the second electrode layer to the direction away from the center of the second electrode layer, the extension sections extend from a starting position to a position connected with the first connection section, the extraction position is arranged at the position where the extension sections are connected with the first connection section, and the starting position of the extension sections is connected with the second connection section.
For any one of the electrode units, if the distance x in the radial direction between the starting position of the extension and the first position of the electrode unit is set to be x, the length of the extension is g (x), whereinC is a constant (L)>Indicating the rate of change of the phase of the liquid crystal material with respect to the change of voltage.
2. The fresnel liquid crystal lens of claim 1, wherein each electrode unit in the second electrode layer corresponds to at least one fresnel zone; when the electrode units are loaded with a first driving voltage and a second driving voltage, the electric potential generated by the second conductive wires of the electrode units enables liquid crystals in the liquid crystal layer to form phase distribution equivalent to a Fresnel zone corresponding to the electrode units.
3. The fresnel liquid crystal lens of claim 1, wherein the second conductive line is circular arc shaped.
4. The fresnel liquid crystal lens of claim 1, wherein the extension of the first conductive line is circular arc shaped.
5. The fresnel liquid crystal lens according to claims 1 to, wherein the start position and the exit position of at least one of the plurality of extension sections are connected to the adjacent two extension sections by a first connection section and a second connection section, respectively.
6. The fresnel liquid crystal lens of claim 1, further comprising an electrode lead group including a first electrode lead and a second electrode lead extending from near a center of the second electrode layer in a direction away from the second electrode layer, one end of the first electrode lead being connected to a first driving voltage, the other end being electrically connected to a first location of the first conductive line, one end of the second electrode lead being connected to a second driving voltage, the other end being electrically connected to a second location of the first conductive line, the starting location of the extension and the suspended one end of the second conductive line being located on opposite sides of the first electrode lead, respectively.
7. The fresnel liquid crystal lens of claim 6, wherein the electrode lead set further comprises a third electrode lead extending from the second location of the first conductive line to a location connected to the second electrode lead in a radial direction of the liquid crystal lens.
8. A fresnel liquid crystal lens according to claim 1, characterised in that: and the distance between the adjacent second conductive wires is less than or equal to 100 mu m.
9. Fresnel liquid crystal lens according to claims 1 to 8, characterised in that a high-resistance film or a high-dielectric constant layer is provided between the second electrode layer and the second alignment layer or between the second electrode layer and the second transparent substrate.
10. Electronic product, characterized in that it comprises a control circuit and a fresnel liquid crystal lens according to any one of claims 1 to 9, said control circuit being electrically connected to said fresnel liquid crystal lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311329846.5A CN117572692A (en) | 2022-11-01 | 2022-11-01 | Fresnel liquid crystal lens and electronic product |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311329846.5A CN117572692A (en) | 2022-11-01 | 2022-11-01 | Fresnel liquid crystal lens and electronic product |
| PCT/CN2022/128969 WO2024092502A1 (en) | 2022-11-01 | 2022-11-01 | Liquid crystal optical device, liquid crystal lens arrays, electronic product and manufacturing method |
| CN202280013819.4A CN117083566A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal optical device, liquid crystal lens array, electronic product and manufacturing method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280013819.4A Division CN117083566A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal optical device, liquid crystal lens array, electronic product and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117572692A true CN117572692A (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311329855.4A Pending CN117572693A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal lens, liquid crystal lens array, electronic product and manufacturing method |
| CN202311330054.XA Pending CN117572694A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal cylindrical lens with adjustable focal power, array, electronic product and driving method |
| CN202311330204.7A Pending CN117647903A (en) | 2022-11-01 | 2022-11-01 | Optical power adjustable liquid crystal lens, array, electronic product and driving method |
| CN202311329846.5A Pending CN117572692A (en) | 2022-11-01 | 2022-11-01 | Fresnel liquid crystal lens and electronic product |
| CN202280013819.4A Pending CN117083566A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal optical device, liquid crystal lens array, electronic product and manufacturing method |
| CN202311787942.4A Pending CN117631383A (en) | 2022-11-01 | 2022-11-01 | Fresnel liquid crystal cylindrical lens and electronic product |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311329855.4A Pending CN117572693A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal lens, liquid crystal lens array, electronic product and manufacturing method |
| CN202311330054.XA Pending CN117572694A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal cylindrical lens with adjustable focal power, array, electronic product and driving method |
| CN202311330204.7A Pending CN117647903A (en) | 2022-11-01 | 2022-11-01 | Optical power adjustable liquid crystal lens, array, electronic product and driving method |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280013819.4A Pending CN117083566A (en) | 2022-11-01 | 2022-11-01 | Liquid crystal optical device, liquid crystal lens array, electronic product and manufacturing method |
| CN202311787942.4A Pending CN117631383A (en) | 2022-11-01 | 2022-11-01 | Fresnel liquid crystal cylindrical lens and electronic product |
Country Status (2)
| Country | Link |
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| CN (6) | CN117572693A (en) |
| WO (1) | WO2024092502A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5893447B2 (en) * | 2012-03-08 | 2016-03-23 | 株式会社ジャパンディスプレイ | Liquid crystal lens, display device, and electronic device |
| KR102188512B1 (en) * | 2014-02-03 | 2020-12-09 | 삼성디스플레이 주식회사 | 3d image display device and liquid crystal lens panel therefor |
| WO2017216716A1 (en) * | 2016-06-16 | 2017-12-21 | Optica Amuka (A.A.) Ltd. | Tunable lenses for spectacles |
| CN111090209B (en) * | 2019-11-13 | 2023-01-24 | 昆山龙腾光电股份有限公司 | Variable-focus liquid crystal lens, driving method of liquid crystal lens and display device |
| CN113325651B (en) * | 2021-06-10 | 2023-03-31 | 电子科技大学 | Liquid crystal optical phased array thermal lens effect compensation device, system and method |
| CN114637155A (en) * | 2022-03-14 | 2022-06-17 | 成都耶塔科技有限责任公司 | Liquid crystal lens, glasses, electronic product and liquid crystal lens driving method |
| CN114637146B (en) * | 2022-03-28 | 2024-02-09 | 成都耶塔科技有限责任公司 | Liquid crystal optical device, liquid crystal optical device array, electronic product, and driving method |
-
2022
- 2022-11-01 CN CN202311329855.4A patent/CN117572693A/en active Pending
- 2022-11-01 CN CN202311330054.XA patent/CN117572694A/en active Pending
- 2022-11-01 CN CN202311330204.7A patent/CN117647903A/en active Pending
- 2022-11-01 CN CN202311329846.5A patent/CN117572692A/en active Pending
- 2022-11-01 WO PCT/CN2022/128969 patent/WO2024092502A1/en unknown
- 2022-11-01 CN CN202280013819.4A patent/CN117083566A/en active Pending
- 2022-11-01 CN CN202311787942.4A patent/CN117631383A/en active Pending
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| Publication number | Publication date |
|---|---|
| WO2024092502A1 (en) | 2024-05-10 |
| CN117572693A (en) | 2024-02-20 |
| CN117631383A (en) | 2024-03-01 |
| CN117647903A (en) | 2024-03-05 |
| CN117572694A (en) | 2024-02-20 |
| CN117083566A (en) | 2023-11-17 |
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