Liquid crystal lens panel and display device

Abstract

The present disclosure provides a liquid crystal lens panel and a display device. The liquid crystal lens panel comprises a first substrate (10), a second substrate (20) arranged oppositely, and a liquid crystal layer (30) arranged between the first substrate (10) and the second substrate (20), the first substrate (10) comprises a first structure layer (12) arranged on a first base (11) and a first alignment layer (13) arranged on the first structure layer (12), the second substrate (20) comprises a second structure layer (22) arranged on a second base (21) and a second alignment layer (23) arranged on the second structure layer (22); in a plane parallel to the liquid crystal lens panel, at least one of the first alignment layer (13) and the second alignment layer (23) comprises a plurality of alignment regions, and the alignment pre-tilt angles of at least two alignment regions are different.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to, but is not limited to, the technical field of display, in particular to a liquid crystal lens panel and a display device. BACKGROUND

[0002] Naked-eye three-dimensional graphics (3D) display is gradually becoming a research hotspot and is considered to be the next generation of display. At present, one implementation of naked-eye 3D display is to superimpose a liquid crystal microlens array in front of a display panel, and to use the refraction of the lens to achieve image separation, so that the images corresponding to the left eye and the right eye are respectively projected in the left eye and the right eye, so that the viewer sees 3D images. Since the liquid crystal microlens array naked-eye 3D display can fully utilize the electrically controlled zooming characteristics of the liquid crystal microlens array, the imaging effect is good, so that the 3D scene can be well presented with rich information, and has continuous viewing angle and spatial depth, which can well meet the viewing habits of the human eye. SUMMARY

[0003] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0004] In one aspect, the exemplary embodiments of the present disclosure provide a liquid crystal lens panel, comprising a first substrate, a second substrate arranged oppositely, and a liquid crystal layer arranged between the first substrate and the second substrate, the first substrate comprises a first structure layer arranged on a side of the first substrate facing the second substrate and a first alignment layer arranged on a side of the first structure layer away from the first substrate, and the second substrate comprises a second structure layer arranged on a side of the second substrate facing the first substrate and a second alignment layer arranged on a side of the second structure layer away from the second substrate; in a plane parallel to the liquid crystal lens panel, at least one of the first alignment layer and the second alignment layer comprises a plurality of alignment regions, and the alignment pre-tilt angles of at least two alignment regions are different.

[0005] In an exemplary implementation, the plurality of alignment regions comprises a plurality of alignment rows arranged in sequence along a vertical direction, the alignment pre-tilt angles of at least two alignment rows in the plurality of alignment rows are different, and the vertical direction is a vertical direction when the liquid crystal lens panel is viewed by a viewer.

[0006] In an exemplary implementation, the at least two alignment rows are symmetrically arranged with respect to a first reference line, the absolute values of the alignment pre-tilt angles of the two alignment rows are the same, the first reference line is a straight line extending along a horizontal direction and passing through a panel center point, and the panel center point is a geometric center of the liquid crystal lens panel.

[0007] In an example embodiment, the absolute value of the orientation pre-tilt angle of the orientation row is proportional to a first distance, the first distance being a distance between a first center line of the orientation row and the first reference line, the first center line being a straight line that bisects the orientation row in a vertical direction and extends along a horizontal direction.

[0008] In an example embodiment, the orientation pre-tilt angle of the orientation row above the first reference line is greater than 0°, the orientation pre-tilt angle of the orientation row below the first reference line is less than 0°, and the orientation pre-tilt angle of the orientation row on the first reference line is 0.1° to 1°.

[0009] In an example embodiment, the absolute value of the orientation pre-tilt angle is less than or equal to 6°.

[0010] In an example embodiment, the first structure layer includes a first electrode layer disposed on a side of the first substrate facing the second substrate and a first insulating layer disposed on a side of the first electrode layer away from the first substrate; the second structure layer includes a second electrode layer disposed on a side of the second substrate facing the first substrate; the first electrode layer is a strip-shaped electrode, and the second electrode layer is a planar electrode.

[0011] In an example embodiment, in a plane parallel to the liquid crystal lens panel, the first insulating layer includes a plurality of repeating units arranged regularly, at least one repeating unit includes a plurality of insulating regions, and the dielectric constants of at least two insulating regions are different.

[0012] In an example embodiment, the repeating unit includes a first insulating region, a second insulating region, and a third insulating region, the first insulating region is configured to compensate for the chromatic dispersion characteristics of the liquid crystal lens corresponding to the first insulating region when light of a first wavelength passes through the liquid crystal layer, the second insulating region is configured to compensate for the chromatic dispersion characteristics of the liquid crystal lens corresponding to the second insulating region when light of a second wavelength passes through the liquid crystal layer, and the third insulating region is configured to compensate for the chromatic dispersion characteristics of the liquid crystal lens corresponding to the third insulating region when light of a third wavelength passes through the liquid crystal layer, so that the focal lengths of the liquid crystal lenses corresponding to the three insulating regions are the same.

[0013] In an example embodiment, the first wavelength is greater than the second wavelength, and the second wavelength is greater than the third wavelength; the first insulating region has a first dielectric constant, the second insulating region has a second dielectric constant, and the third insulating region has a third dielectric constant, the first dielectric constant is greater than the second dielectric constant, and the second dielectric constant is greater than the third dielectric constant.

[0014] In an example embodiment, the first wavelength is 605 nm to 700 nm, and the first dielectric constant is 5 to 6.

[0015] In an exemplary embodiment, the second wavelength is 505nm to 600nm, and the second dielectric constant is 3.0 to 3.5.

[0016] In an exemplary embodiment, the third wavelength is 400nm to 500nm, and the third dielectric constant is 1.5 to 2.0.

[0017] In another aspect, the exemplary embodiments of the present disclosure also provide a display device, comprising a display panel and the aforementioned liquid crystal lens panel.

[0018] In an exemplary embodiment, the display panel comprises a plurality of pixel units arranged regularly, at least one pixel unit comprises a first sub-pixel emitting first color light, a second sub-pixel emitting second color light and a third sub-pixel emitting third color light, and in the repeating unit of the liquid crystal lens panel, the first insulating area corresponds to the position of the first sub-pixel, the second insulating area corresponds to the position of the second sub-pixel, and the third insulating area corresponds to the position of the third sub-pixel.

[0019] Other aspects can become apparent from a review of the drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute a limitation on the technical solutions of the present disclosure. The shapes and sizes of the components in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the present disclosure.

[0021] Figure 1 FIG. 1 is a structural schematic diagram of a display device;

[0022] Figure 2 FIG. 2 is a structural schematic diagram of a liquid crystal display panel;

[0023] Figure 3 FIG. 3 is a plan structural schematic diagram of a liquid crystal display panel;

[0024] Figure 4 FIG. 4 is a sectional structural schematic diagram of a liquid crystal display panel;

[0025] Figure 5 FIG. 5 is a structural schematic diagram of a liquid crystal lens panel;

[0026] Figure 6 FIG. 6 is a working schematic diagram of a liquid crystal lens panel;

[0027] Figure 7 FIG. 7 is a schematic diagram of vertical viewing angle characteristics;

[0028] Figure 8 A structural schematic diagram of a liquid crystal lens panel according to an exemplary embodiment of the present disclosure;

[0029] Figure 9 A structural schematic diagram of a plurality of orientation rows according to an exemplary embodiment of the present disclosure;

[0030] Figure 10 A schematic diagram of a pre-tilt angle of a liquid crystal molecule according to an exemplary embodiment of the present disclosure;

[0031] Figure 11 A planar structural schematic diagram of a first insulating layer according to an exemplary embodiment of the present disclosure;

[0032] Figure 12 A simulation result schematic diagram of an equivalent surface type of a liquid crystal lens;

[0033] Figure 13 A schematic diagram of a pixel island and a corresponding position of a lens according to an exemplary embodiment of the present disclosure.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 10 - first substrate; 11 - first base; 12 - first structure layer;

[0036] 13 - first orientation layer; 20 - second substrate; 21 - second base;

[0037] 22 - second structure layer; 23 - second orientation layer; 30 - liquid crystal layer;

[0038] 31 - first orientation row; 32 - second orientation row; 33 - third orientation row;

[0039] 34 - fourth orientation row; 35 - fifth orientation row; 60 - repeating unit;

[0040] 70 - pixel island; 80 - columnar lens; 100 - display panel;

[0041] 121 - first electrode layer; 122 - first insulating; 131 - first insulating area;

[0042] 132 - second insulating area; 133 - third insulating area; 200 - liquid crystal lens panel;

[0043] 221 - second electrode layer; 301 - array substrate; 302 - color film substrate;

[0044] 303 - display liquid crystal layer. DETAILED DESCRIPTION

[0045] For the purpose of making the objects, technical solutions and advantages of the present disclosure clearer, the following will describe the embodiments of the present disclosure in detail with reference to the drawings. Note that the embodiments can be implemented in a variety of different forms. It should be understood by those skilled in the art that the embodiments and contents can be changed into various forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. The embodiments in the present disclosure and the features in the embodiments can be combined with each other arbitrarily without conflict. In order to keep the following description of the embodiments of the present disclosure clear and brief, the present disclosure omits the detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure only involve the structures related to the embodiments of the present disclosure, and other structures can be referred to the generally designed

[0046] The scale of the drawings in the present disclosure can be used as a reference in the actual process, but is not limited thereto. For example, the width-length ratio of the channel, the thickness and spacing of each film layer, and the width and spacing of each signal line can be adjusted according to actual needs. The number of pixels in the display substrate and the number of sub-pixels in each pixel are also not limited to the number shown in the drawings. The drawings described in the present disclosure are only schematic structural diagrams, and one embodiment of the present disclosure is not limited to the shapes or values shown in the drawings.

[0047] In the present specification, ordinal numbers such as "first", "second", "third", and the like are provided to avoid confusion of components, and are not intended to be limiting in terms of number.

[0048] In the present specification, for the purpose of convenience, words indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to describe the positional relationship of the components with reference to the drawings, and are only for the purpose of facilitating the description of the present specification and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. The positional relationship of the components is appropriately changed according to the direction of describing each component. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0049] In the present specification, unless explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate piece, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0050] In this specification, a transistor means an element including at least three terminals of a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between the drain electrode (a drain electrode terminal, a drain region, or a drain electrode) and the source electrode (a source electrode terminal, a source region, or a source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that, in this specification, the channel region means a region where current flows mainly.

[0051] In this specification, the first electrode can be a drain electrode and the second electrode can be a source electrode, or the first electrode can be a source electrode and the second electrode can be a drain electrode. In the case of using a transistor having opposite polarity or in the case of changing the direction of current in circuit operation, the functions of the "source electrode" and the "drain electrode" are sometimes interchanged. Thus, in this specification, the "source electrode" and the "drain electrode" can be interchanged with each other.

[0052] In this specification, "electrically connected" includes the case where components are connected through an element having some function of electricity. The element having some function of electricity is not particularly limited as long as electric signals can be transmitted and received between components to be connected. Examples of the element having some function of electricity include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, and another element having some function.

[0053] In this specification, "parallel" means a state where an angle formed between two straight lines is greater than or equal to -10° and less than or equal to 10°, and thus includes a state where the angle is greater than or equal to -5° and less than or equal to 5°. In addition, "perpendicular" means a state where an angle formed between two straight lines is greater than or equal to 80° and less than or equal to 100°, and thus includes a state where the angle is greater than or equal to 85° and less than or equal to 95°.

[0054] In this specification, "film" and "layer" can be interchanged with each other. For example, "a conductive layer" can be changed into "a conductive film". Similarly, "an insulating film" can be changed into "an insulating layer".

[0055] In this specification, "disposed in the same layer" means that two (or more) structures are patterned by the same patterning process, and the materials thereof can be the same or different. For example, the materials of precursors for forming the two (or more) structures disposed in the same layer are the same, and the materials finally formed can be the same or different.

[0056] In this specification, a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon is not strictly a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, but can be an approximately triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and can have some small deformation due to a tolerance, can have a rounded corner, a rounded side, and deformation, and the like.

[0057] In the present disclosure, "about" means not strictly limited to the boundary, allowing values within the range of process and measurement errors.

[0058] Figure 1 FIG. 1 is a structural schematic diagram of a display device. As shown in FIG. 1, the display device can include a display panel 100 and a liquid crystal lens panel 200 disposed on the light exit side of the display panel 100, the display panel 100 is configured to perform image display, and the liquid crystal lens panel 200 is configured to modulate light rays emitted by the display panel 100 according to a set mode, realizing 2D display or 3D display. Figure 1

[0059] In an exemplary embodiment, the display device can realize first mode display and second mode display. In the first mode display, the liquid crystal lens panel 200 does not modulate the light rays emitted by the display panel 100, so that the display device realizes 2D display. In the second mode display, the liquid crystal lens panel 200 modulates the path or phase of the light rays emitted by the display panel 100, so that the display device realizes 3D display. This selective modulation based on mode can enable the display device to switch between 2D display and 3D display.

[0060] In an exemplary embodiment, the display panel can be a self-luminous display panel, or can be a non-self-luminous display panel including a backlight module. The display panel can include any one or more of the following: a liquid crystal display (LCD), an organic light emitting diode (OLED), a light emitting diode (LED), an inorganic electroluminescent display (EL), a field emission display (FED), a surface-conduction electron-emitter display (SED), a plasma display panel (PDP), and an electrophoretic display (EPD).

[0061] Figure 2 FIG. 2 is a structural schematic diagram of a liquid crystal display panel. As shown in FIG. 2, the liquid crystal display panel can include a display panel 100 and a liquid crystal lens panel 200 disposed on the light exit side of the display panel 100, the display panel 100 is configured to perform image display, and the liquid crystal lens panel 200 is configured to modulate light rays emitted by the display panel 100 according to a set mode, realizing 2D display or 3D display. Figure 2 ​As shown, in an exemplary embodiment, the liquid crystal display panel can include a display area and a frame area, the display area can include a plurality of gate lines (S1 to Sm) and a plurality of data lines (D1 to Dn), the plurality of gate lines can extend along a horizontal direction and be arranged in sequence along a vertical direction, the plurality of data lines can extend along the vertical direction and be arranged in sequence along the horizontal direction, the plurality of gate lines and the plurality of data lines crossing each other define a plurality of sub-pixels Pxij arranged in a regular pattern, m, n, i and j can be natural numbers. In an exemplary embodiment, at least one sub-pixel Pxij can include a thin film transistor, a pixel electrode and a common electrode, the thin film transistor is connected with the gate line, the data line and the pixel electrode respectively.

[0062] In an exemplary embodiment, the display area can further include a plurality of common electrode lines (E1 to Eo), the plurality of common electrode lines can extend along the horizontal direction and be arranged in sequence along the vertical direction, the plurality of common electrode lines are connected with the common electrode in the plurality of sub-pixels Pxij in correspondence.

[0063] In an exemplary embodiment, the plurality of gate lines are led out to the frame area and connected with a scan driver, the plurality of data lines are led out to the frame area and connected with a data driver, at least a part of the scan driver and the data driver can be formed on the substrate.

[0064] In an exemplary embodiment, an external control device (such as a timing controller) can provide a gray scale value and a control signal suitable for the specification of the data driver to the data driver, the data driver can use the received gray scale value and control signal to generate a data voltage to be provided to the data signal lines D1, D2, D3, … and Dn. For example, the data driver can sample the gray scale value using a clock signal, and apply the data voltage corresponding to the gray scale value to the data signal lines D1 to Dn in units of pixels. The external control device can provide a clock signal, a scan start signal, etc. suitable for the specification of the scan driver to the scan driver, the scan driver can use the clock signal, the scan start signal, etc. to generate a scan signal to be provided to the scan signal lines S1, S2, S3, … and Sm. For example, the scan driver can sequentially provide the scan signal with a turn-on level pulse to the scan signal lines S1 to Sm. For example, the scan driver can be configured in the form of a shift register, and can generate the scan signal in a manner of sequentially transmitting the scan start signal provided in the form of a turn-on level pulse to the next stage circuit under the control of the clock signal.

[0065] Figure 3 A schematic view of a planar structure of a liquid crystal display panel. As shown, Figure 3As shown, the display panel may include a plurality of pixel units P arranged in a regular pattern. At least one of the plurality of pixel units P may include a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light. Each of the three sub-pixels may include a thin-film transistor, a pixel electrode, and a common electrode. In an exemplary embodiment, the first sub-pixel P1 may be a red sub-pixel emitting red (R) light, the second sub-pixel P2 may be a green sub-pixel emitting green (G) light, and the third sub-pixel P3 may be a blue sub-pixel emitting blue (B) light. The shape of the sub-pixels in the pixel unit may be rectangular, rhomboid, pentagonal, or hexagonal, etc. The sub-pixels in the pixel unit may be arranged horizontally side by side, vertically side by side, or in a triangular pattern. This disclosure does not limit the arrangement. In an exemplary embodiment, the pixel unit may include four sub-pixels. This disclosure does not limit the arrangement of the sub-pixels.

[0066] Figure 4 This is a schematic cross-sectional view of a liquid crystal display panel. Figure 4 As shown, a liquid crystal display panel may include a thin film transistor (TFT) array substrate 301 and a color filter (CF) substrate 302, and a liquid crystal (LC) layer 303 disposed between the array substrate 301 and the color filter substrate 302. An electric field is formed to drive the liquid crystal deflection by controlling the common electrode and pixel electrodes, thereby achieving grayscale display. In exemplary embodiments, liquid crystal display panels can be classified according to display mode into Twisted Nematic (TN) display mode, Vertical Alignment (VA) display mode, In-Plane Switching (IPS) display mode, Fringe Field Switching (FFS) display mode, and Advanced Super Dimension Switching (ADS) display mode, etc. For the horizontal electric field type ADS display mode, the array substrate 301 may include gate lines, data lines, thin film transistors, pixel electrodes, and a common electrode, and the color filter substrate 302 may include a black matrix and a filter layer.

[0067] In an exemplary embodiment, the liquid crystal panel may further include a first polarizer, a second polarizer, and a backlight. The first polarizer may be disposed on the side of the array substrate 301 away from the color filter substrate 302, and the second polarizer may be disposed on the side of the color filter substrate 302 away from the array substrate 301. The light transmission axis of the first polarizer and the light transmission axis of the second polarizer are perpendicular to each other. Light emitted from the backlight passes sequentially through the first polarizer, the array substrate, the liquid crystal layer, the color filter substrate, and the second polarizer before exiting. Without voltage applied, the liquid crystal layer does not distort the light. After passing through the first polarizer and the liquid crystal layer, the polarization direction of the light is perpendicular to the light transmission axis of the second polarizer, preventing light transmission and thus displaying a dark image; the display panel is in a dark state. With voltage applied, the liquid crystal molecules rotate, thus distorting the light and changing its polarization direction, allowing the light to pass through the second polarizer and exit, thereby displaying a bright image; the display panel is in a bright state.

[0068] Figure 5 This is a schematic diagram of the structure of a liquid crystal lens panel. Figure 5 As shown, the liquid crystal lens panel may include a first substrate 10 and a second substrate 20 disposed opposite to each other, and a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20. In an exemplary embodiment, the first substrate 10 may include a first electrode layer and a first alignment layer disposed on a first substrate, and the second substrate 20 may include a second electrode layer and a second alignment layer disposed on a second substrate. The first electrode layer and the second electrode layer are respectively configured to form a predetermined electric field between the first electrode layer and the second electrode layer, such that the liquid crystal layer 30 forms a liquid crystal lens. The first alignment layer and the second alignment layer are respectively disposed on both sides of the liquid crystal layer 30 and are configured to give the liquid crystal molecules in the liquid crystal layer 30 an initial orientation.

[0069] Figure 6 This is a schematic diagram of a liquid crystal lens panel. By applying corresponding voltages to the first and second electrode layers, the liquid crystal molecules at different positions in the liquid crystal layer are deflected to different degrees, forming a liquid crystal lens to change the direction of light propagation after passing through the liquid crystal layer.

[0070] In an exemplary embodiment, liquid crystal molecules in the liquid crystal layer have optical birefringence property, i.e. the liquid crystal molecules have two refractive indices optically, including ordinary ray refractive index no for light in long axis direction and extraordinary ray refractive index ne for light in short axis direction, the ordinary ray refractive index no can be less than the extraordinary ray refractive index ne. For example, the ordinary ray refractive index no of the liquid crystal molecules can be about 1.5 or so, while the extraordinary ray refractive index ne of the liquid crystal molecules can be about 1.7 or so. Therefore, if the liquid crystal molecules are arranged horizontally, the liquid crystal layer has the extraordinary ray refractive index ne, which has relatively large refractive index, if the liquid crystal molecules are rotated to vertical direction, the liquid crystal layer has the ordinary ray refractive index no, which has relatively small refractive index. Since the propagation speed of light in a material with larger refractive index is slower, and the propagation speed of light in a material with smaller refractive index is faster, when the light propagates in the liquid crystal layer with different refractive indices, the light path will bend from the liquid crystal region with lower refractive index to the liquid crystal region with higher refractive index, showing the light propagation path as shown in Figure 6

[0071] In an exemplary embodiment, Figure 6 the light propagation path through the convex lens is basically similar, the liquid crystal layer has similar optical properties to the convex lens. As shown in Figure 6 the light path of the light from the display panel will be modulated to bend to the right after passing through the left region of the liquid crystal lens panel, entering the right eye E1 of the viewer, the light path of the light from the display panel will be modulated to bend to the left after passing through the right region of the liquid crystal lens panel, entering the left eye E2 of the viewer, so that the viewer can watch the three-dimensional image.

[0072] It is found that the viewing angle characteristic of the existing structure of the liquid crystal lens panel will cause the imaging effect to decrease. The viewing angle characteristic refers to that when the viewing position of the viewer is on the central line of sight of the panel, the line of sight of the viewer viewing the edge position of the panel forms a certain angle with the central line of sight of the panel, and the central line of sight of the panel is a straight line perpendicular to the panel plane and passing through the center point of the panel, which can be the geometric center of the liquid crystal lens panel.

[0073] Figure 7 is a schematic diagram of a vertical viewing angle characteristic, taking the case that the eyes E of the viewer are on the central line of sight O of the liquid crystal lens panel 200. When the viewer watches the image at the center point position of the panel, the line of sight of the viewer overlaps with the central line of sight O of the panel, so that the viewing angle of the viewer watching the image is 0, and there is no viewing angle characteristic. When the viewer watches the image at the upper and lower edge positions of the panel in the vertical direction Y, the line of sight of the viewer has an angle a with the central line of sight O of the panel, so that the image at the upper and lower edge positions of the panel watched by the viewer has a vertical viewing angle a, as shown in Figure 7 ​As shown, as the panel size increases, the vertical viewing angle also increases. Since the focal length of the liquid crystal lens is designed for a 0° viewing angle, when the vertical viewing angle is large, liquid crystals in the same arrangement will exhibit different refractive indices. This causes a large deviation in the focal length of the liquid crystal lens at large viewing angles, resulting in a large deformation of the equivalent surface shape of the liquid crystal lens. This deviates significantly from the initially designed focal length and equivalent surface shape, thus leading to a deterioration in the 3D imaging effect.

[0074] In this disclosure, the vertical direction Y refers to the vertical direction of the liquid crystal lens panel from top to bottom or from bottom to top when viewed by the viewer's eye E; the horizontal direction X refers to the horizontal direction of the liquid crystal lens panel from left to right or from right to left when viewed by the viewer's eye E; and the viewing direction Z is the direction perpendicular to the plane of the liquid crystal lens panel.

[0075] An exemplary embodiment of this disclosure provides a liquid crystal lens panel, including a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the first substrate includes a first structural layer disposed on a side of the first substrate facing the second substrate and a first alignment layer disposed on a side of the first structural layer away from the first substrate, and the second substrate includes a second structural layer disposed on a side of the second substrate facing the first substrate and a second alignment layer disposed on a side of the second structural layer away from the second substrate; on a plane parallel to the liquid crystal lens panel, at least one of the first alignment layer and the second alignment layer includes a plurality of alignment regions, and at least two alignment regions have different alignment pretilt angles.

[0076] In an exemplary embodiment, the plurality of orientation regions include a plurality of orientation rows arranged sequentially along a vertical direction, wherein at least two of the orientation rows have different orientation pretilt angles, and the vertical direction is the vertical direction in which the liquid crystal lens panel is viewed by a viewer.

[0077] In an exemplary embodiment, the first structural layer includes a first electrode layer disposed on the side of the first substrate facing the second substrate and a first insulating layer disposed on the side of the first electrode layer away from the first substrate; the second structural layer includes a second electrode layer disposed on the side of the second substrate facing the first substrate; the first electrode layer is a strip electrode and the second electrode layer is a planar electrode.

[0078] In an exemplary embodiment, on a plane parallel to the liquid crystal lens panel, the first insulating layer includes a plurality of repeating units arranged in a regular pattern, at least one repeating unit includes a plurality of insulating regions, and at least two insulating regions have different dielectric constants.

[0079] Figure 8 This is a schematic diagram of the structure of a liquid crystal lens panel, which is an exemplary embodiment of this disclosure. Figure 8As shown, the liquid crystal lens panel can include a first substrate 10 and a second substrate 20 disposed opposite to each other, and a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20. The first substrate 10 can include a first base 11, a first structure layer 12 disposed on a side of the first base 11 facing the second substrate 20, and a first alignment layer 13 disposed on a side of the first structure layer 12 facing away from the first base 11, and the second substrate 20 can include a second base 21, a second structure layer 22 disposed on a side of the second base 21 facing the first substrate 10, and a second alignment layer 23 disposed on a side of the second structure layer 22 facing away from the second base 21.

[0080] In an example embodiment, the first structure layer 12 can include a first electrode layer 121 disposed on a side of the first base 11 facing the second substrate 20, and a first insulating layer 122 disposed on a side of the first electrode layer 121 facing away from the first base 11, and the first alignment layer 13 is disposed on a side of the first insulating layer 122 facing away from the first base 11.

[0081] In an example embodiment, the second structure layer 22 can include a second electrode layer 221 disposed on a side of the second base 21 facing the first substrate 10, and the second alignment layer 23 is disposed on a side of the second structure layer 22 facing away from the second base 21.

[0082] In an example embodiment, the first electrode layer 121 can be a strip electrode, and the second electrode layer 221 can be a whole surface electrode. The first electrode layer 121 and the second electrode layer 221 are configured to form a predetermined electric field between the first electrode layer 121 and the second electrode layer 221, so that the liquid crystal layer 30 forms a liquid crystal lens.

[0083] In an example embodiment, the first electrode layer 121 and the second electrode layer 221 can employ a transparent conductive material such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Zinc Oxide (ZO), Indium Oxide (IO), Titanium Oxide (TiO), etc. In some possible example embodiments, the first electrode layer 121 and the second electrode layer 221 can employ a material such as Carbon Nanotube, metal nanowire, Conductive Polymer, etc. The first electrode layer 121 and the second electrode layer 221 can employ the same material, or can employ different materials, which are not limited in the present disclosure.

[0084] In an example embodiment, the first insulating layer 122 can be made of silicon oxide SiOx, silicon nitride SiNx, or silicon oxynitride SiON, etc., can be a single-layer structure, or can be a multi-layer composite structure. In an example embodiment, the first insulating layer can be referred to as a passivation (PVX) layer.

[0085] In an example embodiment, the first alignment layer 13 and the second alignment layer 23 are respectively arranged on two sides of the liquid crystal layer 30, and are configured to make the liquid crystal molecules in the liquid crystal layer 30 have an initial attitude, which can at least include an alignment pre-tilt angle.

[0086] In an example embodiment, the first alignment layer 13 and the second alignment layer 23 can achieve the alignment pre-tilt angle through a rubbing process, and can be made of polyimide (PI), which has the advantages of good chemical stability, excellent mechanical properties, good insulation, high temperature resistance, and radiation resistance, etc. In some possible example embodiments, the first alignment layer 13 and the second alignment layer 23 can achieve the alignment pre-tilt angle through an optical alignment (OA) process, which is not limited in the present disclosure.

[0087] In an example embodiment, at least one of the first alignment layer 13 and the second alignment layer 23 can include a plurality of alignment rows in a plane parallel to the liquid crystal lens panel, and the alignment pre-tilt angles of the at least two alignment rows are different.

[0088] Figure 9 FIG. 5 shows a schematic diagram of a structure of a plurality of alignment rows according to an example embodiment of the present disclosure. As shown in FIG. 5, the plurality of alignment rows can include a first alignment row 31, a second alignment row 32, a third alignment row 33, a fourth alignment row 34, and a fifth alignment row 35 arranged in sequence along a vertical direction Y, each of which is a strip shape extending along a horizontal direction X. Figure 9

[0089] In an example embodiment, the at least two alignment rows can be symmetrically arranged relative to a first reference line O1, which can be a straight line extending along the horizontal direction X and passing through a panel center point, which is the geometric center of the liquid crystal lens panel. For example, the positions and geometric parameters of the first alignment row 31 and the fifth alignment row 35 can be mirror-symmetric relative to the first reference line O1. For another example, the positions and geometric parameters of the second alignment row 32 and the fourth alignment row 34 can be mirror-symmetric relative to the first reference line O1. For another example, the third alignment row 33 can be symmetrically arranged relative to the first reference line O1, and a first center line M1 of the third alignment row 33 can overlap the first reference line O1, which is a straight line dividing the alignment row in the vertical direction Y and extending along the horizontal direction X.

[0090] ​In an example embodiment, the absolute values of the orientation pre-tilt angles of the two orientation rows arranged symmetrically relative to the first reference line O1 can be the same. For example, the first orientation row 31 and the fifth orientation row 35 are mirror-symmetric relative to the first reference line O1, the orientation pre-tilt angle of the first orientation row 31 can be 5°, and the orientation pre-tilt angle of the fifth orientation row 35 can be -5°, the absolute values of the orientation pre-tilt angles of the two are the same. In the present disclosure, the absolute values of the orientation pre-tilt angles are not strictly equal, and there can be a certain tolerance range, for example, the tolerance range is within ±20%.

[0091] In an example embodiment, the absolute value of the orientation pre-tilt angle of an orientation row is proportional to the first distance L1, the first distance L1 is the distance between the first center line M1 of the orientation row and the first reference line O1, which is the size in the vertical direction Y. For example, the first distance of the first orientation row 31 is greater than the first distance of the second orientation row 32, and the absolute value of the orientation pre-tilt angle of the first orientation row 31 is greater than the absolute value of the orientation pre-tilt angle of the second orientation row 32. For another example, the first distance of the fifth orientation row 35 is greater than the first distance of the fourth orientation row 34, and the absolute value of the orientation pre-tilt angle of the fifth orientation row 35 is greater than the absolute value of the orientation pre-tilt angle of the fourth orientation row 34.

[0092] In an example embodiment, the plurality of orientation rows arranged in sequence along the vertical direction Y with the first reference line O1 as the classification basis can be divided into orientation rows located above the first reference line O1 and orientation rows located below the first reference line O1. For example, the first orientation row 31 and the second orientation row 32 are orientation rows located above the first reference line O1, and all areas of the above two orientation rows are located above the first reference line O1. For another example, the fourth orientation row 34 and the fifth orientation row 35 are orientation rows located below the first reference line O1, and all areas of the above two orientation rows are located below the first reference line O1.

[0093] In an example embodiment, the orientation pre-tilt angle of the orientation row located above the first reference line O1 can be greater than 0°, and the orientation pre-tilt angle of the orientation row located below the first reference line O1 can be less than 0°. For example, the orientation pre-tilt angle of the first orientation row 31 can be 5°, and the orientation pre-tilt angle of the fifth orientation row 35 can be -5°. For another example, the orientation pre-tilt angle of the second orientation row 32 can be 2.5°, and the orientation pre-tilt angle of the fourth orientation row 34 can be -2.5°.

[0094] In an example embodiment, the plurality of orientation rows can also be divided into orientation rows located in the middle region, and the orthographic projection of the orientation rows located in the middle region on the liquid crystal lens panel plane at least partially overlaps with the orthographic projection of the first reference line O1 on the liquid crystal lens panel plane. For example, the third orientation row 33 is an orientation row located in the middle region.

[0095] In an exemplary embodiment, the orientation pre-tilt angle of the orientation row located in the middle region can be about 0.1° to 1°. For example, the orientation pre-tilt angle of the orientation row located in the middle region can be about 0.1°.

[0096] In an exemplary embodiment, when the number of orientation rows is even, the even number of orientation rows can include orientation rows located above the first reference line O1 and orientation rows located below the first reference line O1. When the number of orientation rows is odd, the odd number of orientation rows can include orientation rows located above the first reference line O1, orientation rows located below the first reference line O1, and an orientation row located in the middle region.

[0097] In an exemplary embodiment, the absolute value of the orientation pre-tilt angle can be less than or equal to 6°.

[0098] In an exemplary embodiment, the orientation pre-tilt angle of the first orientation row 31 can be about 4° to 6°, the orientation pre-tilt angle of the second orientation row 32 can be about 2° to 3°, the orientation pre-tilt angle of the third orientation row 33 can be about 0.1° to 1°, the orientation pre-tilt angle of the fourth orientation row 34 can be about -2° to -3°, and the orientation pre-tilt angle of the fifth orientation row 35 can be about -4° to -6°. For example, the orientation pre-tilt angle of the first orientation row 31 can be about 5°, the orientation pre-tilt angle of the second orientation row 32 can be about 2.5°, the orientation pre-tilt angle of the third orientation row 33 can be about 0.1°, the orientation pre-tilt angle of the fourth orientation row 34 can be about -2.5°, and the orientation pre-tilt angle of the fifth orientation row 35 can be about -5°.

[0099] In an exemplary embodiment, the number of orientation rows can be about 2 to 10.

[0100] Figure 10 A schematic diagram of the pre-tilt angle of a liquid crystal molecule of an exemplary embodiment of the present disclosure is shown. As shown in FIG. 1, for a first alignment layer and a second alignment layer subjected to rubbing treatment or photo-alignment treatment, liquid crystal molecules in a liquid crystal layer will be arranged according to the orientation pre-tilt angle of the alignment layer in an initial state without application of electricity, and the optical axis A1 of the liquid crystal molecules has an angle γ with the liquid crystal lens panel plane (XY plane), which is referred to as the pre-tilt angle of the liquid crystal molecules. Figure 10

[0101] As shown in FIG. 2, the liquid crystal molecules in the liquid crystal layer will be arranged according to the orientation pre-tilt angle of the alignment layer in an initial state without application of electricity, and the optical axis A1 of the liquid crystal molecules has an angle γ with the liquid crystal lens panel plane (XY plane), which is referred to as the pre-tilt angle of the liquid crystal molecules. Figure 7 and Figure 9 ​As shown, taking a liquid crystal lens panel with a 13.5 inch size and a 540 mm viewing distance as an example. For the existing liquid crystal lens panel without zoning of the orientation layer, when the viewer watches the center point of the panel (the line of sight of the viewer overlaps the center line of sight O of the panel), the focal length of the liquid crystal lens is 726.61 μm, when the viewer watches the upper edge of the panel (the line of sight of the viewer has an angle a with the center line of sight O of the panel), the focal length of the liquid crystal lens is 688.20 μm, and when the viewer watches the lower edge of the panel (the line of sight of the viewer has an angle -a with the center line of sight O of the panel), the focal length of the liquid crystal lens is 787.71 μm. Since the focal length of the liquid crystal lens decreases when the viewer watches the upper edge of the panel, the focal length of the liquid crystal lens increases when the viewer watches the lower edge of the panel, and the focal length of the liquid crystal lens is greatly different from that when the viewer watches the center point of the panel, the 3D imaging effect is poor. The liquid crystal lens panel provided by the example embodiments of the present disclosure compensates for the focal length of the liquid crystal lens at a large vertical viewing angle by increasing the pre-tilt angle (positive value) to increase the focal length of the liquid crystal lens and decreasing the pre-tilt angle (negative value) to decrease the focal length of the liquid crystal lens, effectively reduces the deviation of the focal length of the liquid crystal lens at a large vertical viewing angle from the initial designed focal length, and effectively improves the 3D imaging effect.

[0102] Simulation tests show that when the liquid crystal molecules at the upper edge of the panel have a pre-tilt angle of about 5° and the liquid crystal molecules at the lower edge of the panel have a pre-tilt angle of about -5°, the focal length of the liquid crystal lens is optimized to 723.1 μm when the viewer watches the upper edge of the panel, and the focal length of the liquid crystal lens is optimized to 729.90 μm when the viewer watches the lower edge of the panel. The optimized focal length is only about 3.29 μm different from the initial designed focal length, which is within the allowable error range. It can be seen that by pre-tilt angle zoning of the orientation layer, the present disclosure can effectively improve the deviation of the lens focal length in the vertical direction caused by the viewing angle characteristics of the liquid crystal, and effectively improve the 3D imaging effect.

[0103] In the example embodiments, the liquid crystal layer uses positive liquid crystal. The specific numerical relationship in the increase of the pre-tilt angle to increase the focal length and the decrease of the pre-tilt angle to decrease the focal length is related to the properties of the liquid crystal material and the specifications of the liquid crystal lens, and can be obtained by simulation calculation according to the actual situation.

[0104] The liquid crystal material has wavelength dispersion, and different wavelengths of light have different refractive indices when propagating in the liquid crystal layer. For example, the refractive index of a certain liquid crystal material for light with a wavelength of 436 nm is n o = 1.5405, n e = 1.9195; and the refractive index of a certain liquid crystal material for light with a wavelength of 546 nm is n o = 1.5263, n e=1.8319; The refractive index of a certain liquid crystal material for a wavelength of 680nm is: n o =1.5132, n e =1.7919. The effective focal length of a liquid crystal lens is directly proportional to its refractive index. The focal length varies for different wavelengths of light; the longer the wavelength, the longer the focal length. When designing a liquid crystal lens with a center wavelength of 546nm (green light), the designed focal length is approximately 725μm, and the actual focal length is approximately 731.1μm. However, the actual focal length of the same liquid crystal lens is approximately 606.2μm at a wavelength of 450nm (blue light) and approximately 790.5μm at a wavelength of 650nm (red light). Because light of different wavelengths is deflected differently by the liquid crystal lens, it no longer travels parallel in space. Furthermore, since liquid crystal lenses have different focal lengths, light of different wavelengths cannot converge to the same point after passing through the lens (this is called the dispersion characteristic of liquid crystal lenses), leading to color separation in the displayed image and even causing the viewed image to become distorted.

[0105] In an exemplary embodiment, on a plane parallel to the liquid crystal lens panel, the first insulating layer may include a plurality of repeating units arranged in a regular pattern, at least one repeating unit may include a plurality of insulating regions, and at least two insulating regions have different permittivity.

[0106] Figure 11 This is a schematic diagram of the planar structure of the first insulating layer, as described in an exemplary embodiment of this disclosure. Figure 11 As shown, on a plane parallel to the liquid crystal lens panel, the first insulating layer may include a plurality of repeating units 60 arranged in a regular pattern, and at least one repeating unit 60 may include a first insulating region 131, a second insulating region 132 and a third insulating region 133.

[0107] In an exemplary embodiment, the first insulating region 131 is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the first insulating region 131 when light of the first wavelength passes through the liquid crystal layer; the second insulating region 132 is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the second insulating region 132 when light of the second wavelength passes through the liquid crystal layer; and the third insulating region 133 is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the third insulating region 133 when light of the third wavelength passes through the liquid crystal layer, so that the focal lengths of the liquid crystal lenses corresponding to the three insulating regions are substantially the same, and the light of the three wavelengths can converge to the same point in space after passing through the liquid crystal lenses.

[0108] In an exemplary embodiment, a first insulating region of the first insulating layer has a first dielectric constant, a second insulating region of the first insulating layer has a second dielectric constant, and a third insulating region of the first insulating layer has a third dielectric constant. The first dielectric constant, the second dielectric constant, and the third dielectric constant are different.

[0109] In an example embodiment, the first wavelength can be greater than the second wavelength, and the first dielectric constant can be greater than the second dielectric constant.

[0110] In an example embodiment, the second wavelength can be greater than the third wavelength, and the second dielectric constant can be greater than the third dielectric constant.

[0111] In an example embodiment, the first wavelength can be about 605nm to 700nm, the second wavelength can be about 505nm to 600nm, and the third wavelength can be about 400nm to 500nm.

[0112] In an example embodiment, the first dielectric constant can be about 5 to 6. For example, for a center wavelength of about 650nm, the focal length can be compensated from 790.5pm to about 725pm by using a first insulating region with a first dielectric constant of about 5.5.

[0113] In an example embodiment, the second dielectric constant can be about 3.0 to 3.5. For example, for a center wavelength of about 550nm, a focal length of about 725pm can be achieved by using a second insulating region with a second dielectric constant of about 3.2.

[0114] In an example embodiment, the third dielectric constant can be about 1.5 to 2.0. For example, for a center wavelength of about 450nm, the focal length can be compensated from 606.2pm to about 725pm by using a third insulating region with a third dielectric constant of about 1.7.

[0115] In an example embodiment, the thickness of the first insulating layer can be about 1.0pm to 2.0pm. For example, the thickness of the first insulating layer can be about 1.4pm.

[0116] In an example embodiment, the voltage reduction effect of the insulating layer is also related to the thickness of the insulating layer. The greater the thickness of the insulating layer, the greater the voltage reduction effect of the insulating layer, and thus the same reduction effect can be achieved with a smaller change in dielectric constant under the action of a thicker insulating layer.

[0117] The present disclosure adjusts the voltage actually acting on the liquid crystal layer by using different dielectric coefficients of different materials of different insulating regions, so that the focal lengths of the liquid crystal lenses corresponding to the three insulating regions are all design values, and the light of the three wavelengths can converge to the same point in space after passing through the liquid crystal lens, thereby compensating for the chromatic dispersion characteristics of the liquid crystal lens.

[0118] Figure 12A simulation result schematic diagram of the equivalent surface shape of the liquid crystal lens is shown in FIG. 8, taking the light with a wavelength of 450 nm as an example. As shown in FIG. 8, for the prior scheme without partitioning the first insulating layer, the actual focal length of the liquid crystal lens is about 606.2 μm, and the deviation of the equivalent surface shape of the liquid crystal lens from the ideal surface shape is about 18.36%, which exceeds the allowable range. For the scheme of the first insulating layer being partitioned according to the present disclosure, by changing the dielectric constant of the insulating region corresponding to the light with a wavelength of 450 nm, the focal length of the liquid crystal lens is compensated to 725.16 μm without changing other structures, and the deviation of the equivalent surface shape of the liquid crystal lens from the ideal surface shape is reduced to 9.17%. Figure 12

[0119] In the example embodiment, the plurality of insulating regions formed on the first insulating layer can be realized through a patterning process. For example, a first insulating region pattern with a first dielectric constant can be formed through a first patterning process, a second insulating region pattern with a second dielectric constant can be formed through a second patterning process, and a third insulating region pattern with a third dielectric constant can be formed through a third patterning process.

[0120] As can be seen from the structure of the display panel of the example embodiment of the present disclosure, the present disclosure innovatively proposes a composite partitioning scheme, the vertical direction viewing angle characteristic is partitioned according to the orientation pre-tilt angle, the orientation pre-tilt angles of different partitions are different, the dispersion characteristic is partitioned according to the wavelength, and the dielectric constants of different partitions are different, which effectively improves the 3D display imaging effect based on the liquid crystal lens and improves the display quality and quality. For partitioning according to the orientation pre-tilt angle, the focal length of the liquid crystal lens is increased by increasing the pre-tilt angle, and the focal length of the liquid crystal lens is reduced by reducing the pre-tilt angle, which compensates the focal length of the liquid crystal lens at a larger vertical viewing angle and effectively reduces the deviation of the focal length of the liquid crystal lens at a larger vertical viewing angle from the initial design focal length. For partitioning according to the wavelength, different insulating regions correspond to light with different wavelengths, different insulating regions have different dielectric constants, and different dielectric constants are used to adjust the voltage actually acting on the liquid crystal layer, so that the focal lengths of the liquid crystal lenses corresponding to the three insulating regions are all design values, and the light with the three wavelengths can converge to the same point in space after passing through the liquid crystal lens, thereby realizing compensation of the dispersion characteristic of the liquid crystal lens. In addition, the preparation of the liquid crystal lens panel of the example embodiment of the present disclosure can be realized by using mature preparation equipment, the process improvement is small, the compatibility is high, the process implementation is simple, the material sources are extensive and the cost is low, and the implementation is easy, which has good application prospect.

[0121] The example embodiment of the present disclosure further provides a display device, which comprises a display panel and the aforementioned liquid crystal lens panel, and the liquid crystal lens panel is arranged on the light exit side of the display panel.

[0122] ​In an exemplary embodiment, the display panel may include a plurality of pixel islands, and at least one pixel island may include at least one pixel unit. The at least one pixel unit may include a first sub-pixel P1 that emits red light, a second sub-pixel P2 that emits green light, and a third sub-pixel P3 that emits blue light.

[0123] In an exemplary embodiment, the positions of the plurality of repeating units in the first insulating layer on the liquid crystal lens panel can correspond one-to-one with the positions of the plurality of pixel units on the display panel. The position and shape of the first insulating region in the repeating unit can correspond one-to-one with the position and shape of the first sub-pixel in the pixel unit, such that red light emitted from the first sub-pixel passes only through the first insulating region. The position and shape of the second insulating region in the repeating unit can correspond one-to-one with the position and shape of the second sub-pixel in the pixel unit, such that green light emitted from the second sub-pixel passes only through the second insulating region. The position and shape of the third insulating region in the repeating unit can correspond one-to-one with the position and shape of the third sub-pixel in the pixel unit, such that blue light emitted from the third sub-pixel passes only through the third insulating region.

[0124] Figure 13 This is a schematic diagram illustrating the corresponding positions of the pixel islands and lenses in an exemplary embodiment of this disclosure. Figure 13 As shown, the display panel may include multiple pixel islands 70, each pixel island 70 may include three pixel unit columns, and each pixel unit column may include a first sub-pixel P1, a second sub-pixel P2, and a third sub-pixel P3 arranged periodically in the vertical direction Y. The liquid crystal lens formed by the liquid crystal lens panel is a cylindrical lens 80 extending along the vertical direction Y. The position of each cylindrical lens 80 corresponds one-to-one with the position of each pixel island 70, that is, the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 in each pixel island 70 correspond to the same cylindrical liquid crystal lens.

[0125] In an exemplary embodiment, the display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0126] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A liquid crystal lens panel, comprising a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the first substrate includes a first structural layer disposed on a side of the first substrate facing the second substrate and a first alignment layer disposed on a side of the first structural layer away from the first substrate, and the second substrate includes a second structural layer disposed on a side of the second substrate facing the first substrate and a second alignment layer disposed on a side of the second structural layer away from the second substrate; on a plane parallel to the liquid crystal lens panel, at least one of the first alignment layer and the second alignment layer includes a plurality of alignment regions, and at least two alignment regions have different alignment pretilt angles; in, The first structural layer includes a first electrode layer disposed on the side of the first substrate facing the second substrate and a first insulating layer disposed on the side of the first electrode layer away from the first substrate; the second structural layer includes a second electrode layer disposed on the side of the second substrate facing the first substrate; the first electrode layer is a strip electrode and the second electrode layer is a planar electrode; on a plane parallel to the liquid crystal lens panel, the first insulating layer includes a plurality of regularly arranged repeating units, at least one repeating unit includes a plurality of insulating regions, and at least two insulating regions have different dielectric constants; the repeating unit includes a first insulating region, a second insulating region and a third insulating region, the first insulating region is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the first insulating region when light of a first wavelength passes through the liquid crystal layer, the second insulating region is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the second insulating region when light of a second wavelength passes through the liquid crystal layer, and the third insulating region is configured to compensate for the dispersion characteristics of the liquid crystal lens corresponding to the third insulating region when light of a third wavelength passes through the liquid crystal layer, so that the focal lengths of the liquid crystal lenses corresponding to the three insulating regions are the same.

2. The liquid crystal lens panel according to claim 1, wherein, The multiple orientation regions include multiple orientation rows arranged sequentially along the vertical direction, and at least two of the multiple orientation rows have different orientation pretilt angles. The vertical direction is the vertical direction in which the liquid crystal lens panel is viewed by a viewer.

3. The liquid crystal lens panel according to claim 2, wherein, At least two orientation rows are symmetrically arranged with respect to a first reference line, and the two orientation rows have the same absolute value of their orientation pretilt angle; the first reference line is a straight line extending horizontally and passing through the center point of the panel, which is the geometric center of the liquid crystal lens panel.

4. The liquid crystal lens panel according to claim 3, wherein, The absolute value of the orientation pre-tilt angle of the orientation row is proportional to a first distance, which is the distance between the first center line of the orientation row and the first reference line. The first center line is a straight line that bisects the orientation row in the vertical direction and extends in the horizontal direction.

5. The liquid crystal lens panel according to claim 3, wherein, The orientation pre-tilt angle of the orientation rows located above the first baseline is greater than 0°, the orientation pre-tilt angle of the orientation rows located below the first baseline is less than 0°, and the orientation pre-tilt angle of the orientation rows located on the first baseline is 0.1° to 1°.

6. The liquid crystal lens panel according to claim 2, wherein, The absolute value of the orientation pretilt angle is less than or equal to 6°.

7. The liquid crystal lens panel according to claim 1, wherein, The first wavelength is greater than the second wavelength, and the second wavelength is greater than the third wavelength; the first insulating region has a first dielectric constant, the second insulating region has a second dielectric constant, and the third insulating region has a third dielectric constant, wherein the first dielectric constant is greater than the second dielectric constant, and the second dielectric constant is greater than the third dielectric constant.

8. The liquid crystal lens panel according to claim 7, wherein, The first wavelength is 605 nm to 700 nm, and the first dielectric constant is 5 to 6.

9. The liquid crystal lens panel according to claim 7, wherein, The second wavelength is 505 nm to 600 nm, and the second dielectric constant is 3.0 to 3.

5.

10. The liquid crystal lens panel according to claim 7, wherein, The third wavelength is 400 nm to 500 nm, and the third dielectric constant is 1.5 to 2.

0.

11. A display device, wherein, It includes a display panel and a liquid crystal lens panel as described in any one of claims 1 to 10, wherein the liquid crystal lens panel is disposed on the light-emitting side of the display panel.

12. The display device according to claim 11, wherein, The display panel includes a plurality of pixel units arranged in a regular pattern. At least one pixel unit includes a first sub-pixel that emits a first color light, a second sub-pixel that emits a second color light, and a third sub-pixel that emits a third color light. In the repeating unit of the liquid crystal lens panel, a first insulating region corresponds to the position of the first sub-pixel, a second insulating region corresponds to the position of the second sub-pixel, and a third insulating region corresponds to the position of the third sub-pixel.

Images