Glass-based phase retardation film and display device

Abstract

The invention provides a glass-based phase retardation film and a display device, and belongs to the technical field of display. The glass-based phase delay film comprises a glass substrate and an alignment layer which are sequentially stacked, and further comprises a polymerization liquid crystal layer which is arranged on the surface, away from the glass substrate, of the alignment layer. Wherein the glass-based phase delay film is provided with a first area and a second area which are alternately arranged, and the alignment layer comprises a first alignment unit located in the first area and a second alignment unit located in the second area; the polymerized liquid crystal layer comprises a first wave plate unit located in the first area and a second wave plate unit located in the second area; the fast axis direction of the first wave plate unit is perpendicular to the fast axis direction of the second wave plate unit. The glass-based phase delay film can improve the 3D display effect.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a glass-based phase retardation film and a display device. Background Art

[0002] Polarized 3D display (three-dimensional display) technology is also called polarized 3D (PolArizAtion 3D) technology, and is used in conjunction with passive polarized glasses. The image effect of polarized 3D technology is better than that of chromatic aberration, and the cost of glasses is not too high. Many movie theaters also use this type of technology, but the brightness of the display device is required to be higher. Polarized 3D uses the principle that light has a "vibration direction" to decompose the original image. First, the image is divided into two groups of pictures, vertically polarized light and horizontally polarized light. Then, the left and right sides of the 3D glasses use polarized lenses with different polarization directions respectively, so that the left and right eyes of a person can receive two groups of pictures, and then the brain synthesizes a three-dimensional image.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The purpose of the present disclosure is to overcome the deficiencies of the above-mentioned prior art and provide a glass-based phase retardation film and a display device to improve the 3D display effect.

[0005] According to one aspect of the present disclosure, a glass-based phase retardation film is provided, comprising a glass substrate and an alignment layer stacked in sequence, and a polymerized liquid crystal layer disposed on the alignment layer away from the surface of the glass substrate; wherein the glass-based phase retardation film has a first region and a second region alternately disposed, the alignment layer comprises a first alignment unit located in the first region and a second alignment unit located in the second region; the polymerized liquid crystal layer comprises a first wave plate unit located in the first region and a second wave plate unit located in the second region;

[0006] The fast axis direction of the first wave plate unit is perpendicular to the fast axis direction of the second wave plate unit.

[0007] According to an embodiment of the present disclosure, the glass-based phase retardation film further includes a black matrix layer located between the glass substrate and the alignment layer; the black matrix layer has a light-shielding portion and a light-transmitting region;

[0008] An orthographic projection of a boundary line between the first wave plate unit and the second wave plate unit on the glass substrate is located within an orthographic projection of a light shielding portion of the black matrix layer on the glass substrate.

[0009] According to an embodiment of the present disclosure, the thickness of the light shielding portion of the black matrix layer is not greater than 100 nm and the light transmittance is not greater than 30%.

[0010] According to an embodiment of the present disclosure, the material of the light shielding portion of the black matrix layer is metal, alloy or opaque metal oxide.

[0011] According to an embodiment of the present disclosure, the thickness of the black matrix layer is between 20 nm and 50 nm, and the material is an opaque metal oxide.

[0012] According to an embodiment of the present disclosure, the glass-based phase retardation film further includes a transparent conductive layer located on a side of the glass substrate away from the alignment layer.

[0013] According to an embodiment of the present disclosure, the material of the transparent conductive layer is PEDOT.

[0014] According to one embodiment of the present disclosure, the thickness of the transparent conductive layer is not less than 300 angstroms.

[0015] According to an embodiment of the present disclosure, the polymerized liquid crystal layer is formed by curing a precursor liquid crystal layer; the precursor liquid crystal layer has at least one liquid crystal monomer, and the structural formula of the at least one liquid crystal monomer is shown in Chemical Formula 1:

[0016]

[0017] Wherein, R1 to R4 are each independently selected from hydrogen, deuterium, methyl, ethyl, isopropyl, and methoxy; n1 and n2 are each independently selected from integers of 3 to 10;

[0018] The liquid crystal monomers are polymerized under light or heating conditions to generate the polymerized liquid crystal layer.

[0019] According to an embodiment of the present disclosure, the precursor liquid crystal layer has at least two liquid crystal monomers, and the structural formula of each of the liquid crystal monomers is as shown in Chemical Formula 1.

[0020] According to an embodiment of the present disclosure, the first wave plate unit is a first quarter wave plate unit, and the second wave plate unit is a second quarter wave plate unit.

[0021] According to an embodiment of the present disclosure, an alignment direction of the first alignment unit is perpendicular to an alignment direction of the second alignment unit.

[0022] According to another aspect of the present disclosure, a display device is provided, comprising a display module and a glass-based phase retardation film arranged on one side of a light-emitting surface of the display module; wherein the display module is capable of emitting linearly polarized light, and a polarization direction of the linearly polarized light differs by 45° from a fast axis direction of the first wave plate unit and a fast axis direction of the second wave plate unit.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] Figure 1 It is a schematic structural diagram of a display device in one embodiment of the present disclosure.

[0026] Figure 2 It is a schematic structural diagram of a display device in one embodiment of the present disclosure.

[0027] Figure 3 FIG. 4 is a schematic diagram of the distribution of pattern areas of a display device in one embodiment of the present disclosure.

[0028] Figure 4 FIG. 4 is a schematic diagram of the distribution of pattern areas of a display device in one embodiment of the present disclosure.

[0029] Figure 5 FIG. 4 is a schematic diagram of the distribution of pattern areas of a display device in one embodiment of the present disclosure.

[0030] Figure 6 FIG. 4 is a schematic diagram of the distribution of pattern areas of a display device in one embodiment of the present disclosure.

[0031] Figure 7 It is a schematic structural diagram of a glass-based phase retardation film in one embodiment of the present disclosure.

[0032] Figure 8 This is a schematic structural diagram of an embodiment of the present disclosure, in which a first linear light emitted by a first waveguide grating irradiates a first area to form a first alignment unit.

[0033] Fig. 9 This is a schematic structural diagram of an embodiment of the present disclosure in which a second linear light emitted by a second waveguide grating irradiates a second area to form a second alignment unit.

[0034] Fig.10 It is a schematic structural diagram of a glass-based phase retardation film in one embodiment of the present disclosure.

[0035] Fig.11 It is a schematic structural diagram of a glass-based phase retardation film in one embodiment of the present disclosure.

[0036] Description of reference numerals:

[0037] BM, black matrix layer; BP, glass substrate; CA, pattern area; CA1, first area; CA2, second area; CL, transparent conductive layer; DH, row direction; DV, column direction; GPR, glass-based phase retardation film; HCA, regional row; HPX, pixel row; MDL, display module; MK, mask; OA, alignment layer; OA1, first alignment unit; OA2, second alignment unit; PLC, polymerized liquid crystal layer; PLC1, first wave plate unit; PLC2, second wave plate unit; PNL, display panel; POL, polarizer; PX, pixel; PX1, first pixel; PX2, second pixel; VCA, regional column; VPX, pixel column; WG1, first waveguide grating; WG2, second waveguide grating. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0039] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0040] The present application provides a display device, see Figure 1 and Figure 2 The display device includes a display module MDL and a glass-based phase retardation film GPR disposed on one side of a light-emitting surface of the display module MDL. The display module MDL can emit linearly polarized light, and the glass-based phase retardation film GPR has first regions CA1 and second regions CA2 that are alternately disposed (see Figure 3 to Figure 6 ). The glass-based phase retardation film GPR in one of the first area CA1 and the second area CA2 can convert the linear polarized light emitted by the display module MDL into left-handed circularly polarized light or left-handed elliptically polarized light, and the other can convert the linear polarized light emitted by the display panel PNL into right-handed circularly polarized light or right-handed elliptically polarized light. In this way, the display device emits two different circularly polarized lights (or elliptically polarized lights) in the first area CA1 and the second area CA2, respectively, to form a left eye pattern and a right eye pattern, respectively; the user can see the left eye pattern with the left eye and the right eye pattern with the right eye by using 3D glasses, thereby seeing a 3D visual effect.

[0041] In one embodiment of the present disclosure, see Figure 2 The display module MDL itself has a polarizer, which enables the display module MDL to directly emit linearly polarized light. For example, the display module MDL is a liquid crystal display panel, and the light emitted by the liquid crystal display panel is linearly polarized light.

[0042] In another embodiment of the present disclosure, see Figure 1 The display module MDL includes a display panel PNL and a polarizer POL disposed between the display panel PNL and the glass-based phase retardation film GPR; the light emitted by the display panel PNL is natural light, which is converted into linearly polarized light after passing through the polarizer. For example, the display panel PNL is a display panel for direct LED display, or an OLED display panel, a QLED display panel, a PLED display panel, a display panel using laser display technology, etc., and a polarizer is disposed between the light-emitting side of the display panel and the glass-based phase retardation film GPR.

[0043] Optionally, the polarizer may be directly attached to the surface of the display panel PNL by optical adhesive, or may be fixed to the surface of the display panel PNL by other methods.

[0044] Optionally, the polarizer may be directly attached to the surface of the glass-based phase retardation film GPR by optical adhesive, or may be formed into an integral film material with the glass-based phase retardation film GPR by other methods.

[0045] In one embodiment of the present disclosure, see Figure 3 to Figure 5, the display module MDL has pixels PX arranged in an array; wherein the pixel PX for displaying the left eye pattern is the first pixel PX1, and the pixel PX for displaying the right eye pattern is the second pixel PX2. The first pixel PX1 and the second pixel PX2 are arranged alternately. Correspondingly, the glass-based phase retardation film GPR has a pattern area CA corresponding to the pixels PX one by one; the pattern area CA includes a first area CA1 corresponding to the first pixel PX1 one by one and a second area CA2 corresponding to the second pixel PX2 one by one. In this way, for any pixel PX, it is located in one of the first area CA1 and the second area CA2; in other words, the pixel PX is not located in the first area CA1 and the second area CA2 at the same time. In this way, with the cooperation of polarized 3D glasses, the light output of the pixel PX can only be seen by one of the left eye and the right eye, but not by both the left eye and the right eye at the same time.

[0046] In the embodiment of the present disclosure, the orthogonal row direction DH and column direction DV can be determined according to the normal use state of the display device. Among them, in the normal use state of the display device, the row direction DH is generally parallel to the horizontal direction, for example, the angle between the row direction DH and the horizontal direction does not exceed 30°; the column direction DV is perpendicular to the row direction DH, for example, the column direction DV is generally along the vertical direction. The first area CA1 and the second area CA2 of the glass-based phase delay film GPR cooperate with each pixel PX of the display module MDL, so that the pixel PX and at least one adjacent pixel PX are respectively located in the first area CA1 and the second area CA2, so that the picture displayed by the display module MDL can be roughly evenly divided into a left eye picture and a right eye picture. The two adjacent pixels PX that are adjacent and respectively located in the first area CA1 and the second area CA2 can be adjacent in the same row or in the same column.

[0047] Optionally, the pixels PX may be arranged into a plurality of pixel rows HPX and a plurality of pixel columns VPX; the pixel row HPX includes a plurality of pixels PX sequentially arranged along the row direction DH, and each pixel row HPX is sequentially arranged along the column direction DV; the pixel column VPX includes a plurality of pixels PX sequentially arranged along the column direction DV, and each pixel column VPX is sequentially arranged along the row direction DH. In this way, each pixel PX is located in the intersecting pixel rows HPX and pixel columns VPX. Correspondingly, the CA may be arranged into a plurality of regional rows HCA and a plurality of regional columns VCA; the regional row HCA includes a plurality of CAs sequentially arranged along the row direction DH, and each regional row HCA is sequentially arranged along the column direction DV; the regional column VCA includes a plurality of CAs sequentially arranged along the column direction DV, and each regional column VCA is sequentially arranged along the row direction DH. In this way, each CA is located in the intersecting regional rows HCA and regional columns VCA.

[0048] In one embodiment of the present disclosure, see Figure 4The pixel row HPX includes first pixels PX1 and second pixels PX2 that are alternately arranged in sequence along the row direction DH. Correspondingly, the region row HCA includes first regions CA1 and second regions CA2 that are alternately arranged in sequence along the row direction DH.

[0049] In one embodiment of the present disclosure, see Figure 3 The pixel column VPX includes first pixels PX1 and second pixels PX2 that are alternately arranged in sequence along the column direction DV. Correspondingly, the region column VCA includes first regions CA1 and second regions CA2 that are alternately arranged in sequence along the column direction DV.

[0050] As an example, see Figure 5 , the pixel row HPX includes the first pixel PX1 and the second pixel PX2 which are alternately arranged in the row direction DH, and the pixel column VPX includes the first pixel PX1 and the second pixel PX2 which are alternately arranged in the column direction DV. Correspondingly, the region row HCA includes the first area CA1 and the second area CA2 which are alternately arranged in the row direction DH, and the region column VCA includes the first area CA1 and the second area CA2 which are alternately arranged in the column direction DV. In this example, the first area CA1 and the second area CA2 are staggered in both the row and column directions.

[0051] As another example, see 4, the pixel row HPX includes the first pixel PX1 and the second pixel PX2 alternately arranged in sequence along the row direction DH; the pixels PX in the same pixel column VPX are all the same type of pixels PX, for example, all are the first pixel PX1 or all are the second pixel PX2. In this way, the region row HCA includes the first area CA1 and the second area CA2 alternately arranged in sequence along the row direction DH; the pattern areas CA in the same region column VCA are all the same type of pattern areas CA, for example, all are the first area CA1 or all are the second area CA2. In this way, in the picture displayed by the display device, the left eye picture and the right eye picture each include a plurality of single-column pixel pictures, and the left eye single-column pixel pictures and the right eye single-column pixel pictures are alternately arranged along the row direction.

[0052] As another example, see Figure 3, the pixel column VPX includes a first pixel PX1 and a second pixel PX2 arranged alternately in sequence along the column direction DV; the pixels PX in the same pixel row HPX are all the same type of pixels PX, for example, all are first pixels PX1 or all are second pixels PX2. In this way, the region column VCA includes a first region CA1 and a second region CA2 arranged alternately in sequence along the column direction DV; the pattern regions CA in the same region row HCA are all the same type of pattern regions CA, for example, all are first regions CA1 or all are second regions CA2. In this way, in the picture displayed by the display device, the left eye picture and the right eye picture each include a plurality of single-row pixel pictures, and the left eye single-row pixel pictures and the right eye single-row pixel pictures are alternately arranged along the column direction. When the display device adopts the glass-based phase delay film GPR of this example, the display device can have a wide horizontal viewing angle, and the preparation process of the glass-based phase delay film GPR can be simplified and the reliability of the glass-based phase delay film GPR can be improved. In particular, when the display device is a TV with a 3D stereoscopic function, the glass-based phase delay film GPR of this example can enable the TV to have a large horizontal wide viewing angle.

[0053] In the above example, the one-to-one correspondence between the pixel PX and the pattern area CA is used as an example for introduction and explanation. Figure 6 , if multiple adjacent pixels PX are all used to display the left eye image or are all used to display the right eye image, then the area where the multiple pixels PX are located can also be used as a pattern area CA instead of multiple pattern areas CA. In other words, a first area CA1 can cover multiple adjacent first pixels PX1, for example, a first area CA1 can cover each adjacent first pixel PX1 in the same row or each adjacent first pixel PX1 in the same column. A second area CA2 can cover multiple adjacent second pixels PX2, for example, a second area CA2 can cover each adjacent second pixel PX2 in the same row or each adjacent second pixel PX2 in the same column. For example, see Figure 6 When each pixel PX in the pixel row HPX is used to display the left eye image, the pixel row HPX can be located in the same first area CA1; when each pixel PX in the pixel row HPX is used to display the right eye image, the pixel row HPX can be located in the same second area CA2; in this example, the glass-based phase retardation film GPR includes first areas CA1 and second areas CA2 alternately arranged in sequence along the column direction DV, each first area CA1 covers a row of pixels PX, and each second area CA2 covers a row of pixels PX.

[0054] As follows, the structure, principle and preparation process of the glass-based phase retardation film GPR according to the embodiment of the present disclosure are exemplarily described with reference to the accompanying drawings.

[0055] See also Figure 7 , the glass-based phase retarder GPR comprises a glass substrate BP and an alignment layer OA which are stacked in sequence, and a polymerized liquid crystal layer PLC which is arranged on the surface of the alignment layer OA away from the glass substrate BP. The glass-based phase retarder GPR has a first area CA1 and a second area CA2 which are alternately arranged, the alignment layer OA comprises a first alignment unit OA1 located in the first area CA1 and a second alignment unit OA2 located in the second area CA2; the polymerized liquid crystal layer PLC comprises a first wave plate unit PLC1 located in the first area CA1 and a second wave plate unit PLC2 located in the second area CA2; the fast axis direction of the first wave plate unit PLC1 is perpendicular to the fast axis direction of the second wave plate unit PLC2.

[0056] In this embodiment, the glass-based phase retardation film GPR is directly formed on the glass substrate, which has the advantages of low preparation cost, good support effect, and is conducive to alignment with the pixels PX on the display module, thereby improving the 3D display effect. The glass-based phase retardation film GPR has a first wave plate unit PLC1 located in the first area CA1 and a second wave plate unit PLC2 located in the second area CA2. The display module can emit linearly polarized light, and the polarization direction of the linearly polarized light is located between the fast axis direction of the first wave plate unit PLC1 and the fast axis direction of the second wave plate unit PLC2. In this way, the polarized light emitted by the first pixel PX1 is converted into circularly polarized light or elliptically polarized light after passing through the first wave plate unit PLC1, and the polarized light emitted by the second pixel PX2 is converted into circularly polarized light or elliptically polarized light after passing through the second wave plate unit PLC2; one of the light emitted from the first wave plate unit PLC1 and the light emitted from the second wave plate unit PLC2 is left-handed circularly (or elliptically) polarized light, and the other is right-handed circularly (or elliptically) polarized light.

[0057] In one example, the fast axis direction of the first wave plate unit PLC1 and the fast axis direction of the second wave plate unit PLC2 are 45° apart. Thus, one of the light emitted from the first wave plate unit PLC1 and the light emitted from the second wave plate unit PLC2 is left-handed circularly polarized light, and the other is right-handed circularly polarized light. When used to watch the screen of the display device through polarized 3D glasses, the left and right eye screens have little interference, which is conducive to achieving a better 3D display effect and improving user experience.

[0058] In the embodiment of the present disclosure, the alignment layer OA has a first alignment unit OA1 located in the first area CA1 and a second alignment unit OA2 located in the second area CA2; the arrangement rules of the first alignment unit OA1 and the second alignment unit OA2 are consistent with the arrangement rules of the first area CA1 and the second area CA2. The first alignment unit OA1 and the second alignment unit OA2 are both optically aligned and have their own alignment angles, so that the surface away from the glass substrate BP can align the polymerized liquid crystal layer PLC, and then the polymerized liquid crystal layer PLC can form a first wave plate unit PLC1 corresponding to the first alignment unit OA1 and a second wave plate unit PLC2 corresponding to the second alignment unit OA2.

[0059] For example, when preparing the glass-based phase retardation film GPR, an alignment layer OA can be prepared first, and the alignment layer OA has a first alignment unit OA1 and a second alignment unit OA2 distributed according to a preset rule; each first alignment unit OA1 is arranged in a one-to-one correspondence with each first area CA1, and each second alignment unit OA2 is arranged in a one-to-one correspondence with each second area CA2. Then, a precursor liquid crystal layer can be formed on the surface of the alignment layer OA away from the glass substrate BP, and the precursor liquid crystal layer has at least one liquid crystal monomer, which has a suitable viscosity and can adhere to the surface of the alignment layer OA. Under the alignment effect of the alignment layer OA, the alignment of the liquid crystal monomers in the precursor liquid crystal layer is adjusted to match the alignment angle of the underlying alignment layer OA; for example, the liquid crystal monomers in the precursor liquid crystal layer on the first alignment unit OA1 are arranged in a first direction, and the liquid crystal monomers in the precursor liquid crystal layer on the second alignment unit OA2 are arranged in a second direction, and the first direction is different from the second direction, for example, perpendicular to each other. Then, by irradiation with light or heating, the liquid crystal monomers in the precursor liquid crystal layer are cross-linked, thereby fixing the arrangement direction of the liquid crystal monomers (the liquid crystal monomers form liquid crystal segments after cross-linking). This allows the precursor liquid crystal layer to form a first wave plate unit PLC1 located in the first area CA1 after solidification under the alignment action of the first alignment unit OA1, and to form a second wave plate unit PLC2 located in the second area CA2 after solidification under the alignment action of the second alignment unit OA2. Since the alignment angles of the first alignment unit OA1 and the second alignment unit OA2 are different, the arrangement directions of the liquid crystal segments in the first wave plate unit PLC1 and the second wave plate unit PLC2 are different, thereby causing the fast axis directions of the first wave plate unit PLC1 and the second wave plate unit PLC2 to be different.

[0060] Alternatively, the alignment angle of the first alignment cells OA1 in the first area CA1 may be perpendicular to the alignment angle of the second alignment cells OA2 in the second area CA2.

[0061] In one embodiment of the present disclosure, the material of the alignment layer OA is a material capable of achieving horizontal optical alignment, for example, it can be a photodecomposition type material, a phototransfer type material, a photoisomorphic type material or a photocrosslinking type material. Further, the alignment layer OA can be made of a polyimide material.

[0062] The following formula illustrates the principle of a photodegradable material in one embodiment.

[0063]

[0064] The material in this example has a group shown in chemical formula A; the group shown in chemical formula A can undergo a decomposition reaction under 254nm light to generate a group shown in chemical formula A1, thereby causing the solubility of the material to change. The photodecomposable material in this example has the advantage of strong alignment with liquid crystal monomers.

[0065] The following formula illustrates the principle of a light-transfer type material.

[0066]

[0067] The material in this example has a group shown in chemical formula B; the group shown in chemical formula B can undergo a transfer reaction under 254nm light to form a group shown in chemical formula B1, thereby causing the solubility of the material to change. Although the light transfer material in this example has a weak alignment force with the liquid crystal monomer, it does not produce additional small molecular decomposition products during the transfer reaction, which is conducive to simplifying the preparation process of the alignment layer OA.

[0068] The following formula illustrates the principle of a photo-isotropic material in one embodiment.

[0069]

[0070] The material in this example has a group shown in chemical formula C; the group shown in chemical formula C can undergo a Trans-cis isomerization reaction under 313nm light to generate a group shown in chemical formula C1, thereby causing the solubility of the material to change. The alignment force between the photo-isomerization material in this example and the liquid crystal monomer is relatively weak, but no additional small molecular decomposition products are generated during the transfer reaction.

[0071] The following formula illustrates the principle of a photo-isotropic material in one embodiment.

[0072]

[0073] The material in this example has a group shown in chemical formula D; the group shown in chemical formula D can undergo a trans-cis isomerization reaction under 365nm light to generate a group shown in chemical formula D1, thereby causing the solubility of the material to change. The alignment force between the photo-isomerization material in this example and the liquid crystal monomer is relatively weak, but no additional small molecular decomposition products are generated during the transfer reaction.

[0074] In one embodiment of the present disclosure, an alignment material layer may be first formed on the surface of the glass substrate BP, and then different regions of the alignment material layer may be aligned respectively with the help of a mask, thereby obtaining an alignment layer OA having a pixel-level pattern. Specifically, with the help of a mask, the portion of the alignment material layer located in the first region CA1 is transformed into a first alignment unit OA1, and the portion of the alignment material layer located in the second region CA2 is transformed into a second alignment unit OA2. In one example, the angle between the first alignment unit OA1 and the second alignment unit OA2 is 90°.

[0075] In one example, see Figure 8 The first linear light provided by the first waveguide grating WG1 (Waveguide Grating) can be used to irradiate the portion of the alignment material layer located in the first area CA1 to achieve curing and form the first alignment unit OA1; see Fig. 9 Then, the second solid linear light provided by the second waveguide grating WG2 (Waveguide Grating) can be used to irradiate the portion of the alignment material layer located in the second area CA2 to achieve solidification, thereby forming the second alignment unit OA2. The grating extension direction of the first waveguide grating WG1 is different from the grating extension direction of the second waveguide grating WG2, thereby making the linear directions of the first linear light and the second linear light different, thereby resulting in different alignment angles of the first alignment unit OA1 and the second alignment unit OA2.

[0076] Furthermore, a patterned mask MK may be provided above the alignment material layer; the mask has a light-shielding area and a light-transmitting area. The incident angle of the first linear light is adjusted so that the first linear light irradiated to the second area CA2 of the alignment material layer is blocked by the light-shielding area of ​​the mask, and the first linear light irradiated to the first area CA1 of the alignment material layer passes through the light-transmitting area without being blocked by the mask. After the first area CA1 of the alignment material layer is photocured and the first alignment unit OA1 is formed, the first linear light is no longer irradiated, but the second linear light is irradiated. The positions of the mask and the glass substrate BP are not adjusted, but the incident angle of the second linear light is adjusted so that the second linear light irradiated to the first area CA1 of the alignment material layer is blocked by the light-shielding area of ​​the mask, and the second linear light irradiated to the second area CA2 of the alignment material layer passes through the light-transmitting area without being blocked by the mask. In this way, the second area CA2 of the alignment material layer is photocured and the second alignment unit OA2 is formed.

[0077] In one example, the thickness of the alignment layer OA is between 80 nm and 120 nm.

[0078] In one embodiment of the present disclosure, the precursor liquid crystal layer has at least one liquid crystal monomer, and the structural formula of the at least one liquid crystal monomer is as shown in Chemical Formula 1:

[0079]

[0080] Wherein, R1 to R4 are each independently selected from hydrogen, deuterium, methyl, ethyl, isopropyl, and methoxy; n1 and n2 are each independently selected from integers of 3 to 10;

[0081] The liquid crystal monomers are polymerized under light or heating conditions so that the precursor liquid crystal layer is transformed into the polymerized liquid crystal layer PLC.

[0082] Furthermore, the precursor liquid crystal layer has at least two liquid crystal monomers, and the structural formula of each of the liquid crystal monomers is as shown in Chemical Formula 1.

[0083] Optionally, in Chemical Formula 1, each of R1 to R4 is independently selected from hydrogen and methyl, and only one of them is selected from methyl.

[0084] Optionally, in Chemical Formula 1, n1 and n2 are each independently selected from integers of 4 to 6.

[0085] Optionally, in Chemical Formula 1, n1 and n2 are equal.

[0086] In one example, the precursor liquid crystal layer has a first liquid crystal monomer and a second liquid crystal monomer, the structural formula of the first liquid crystal monomer is as shown in Chemical Formula 1, and R1 is a methyl group, R2 to R4 are hydrogen, and n1 and n2 are both 4. The structural formula of the second liquid crystal monomer is as shown in Chemical Formula 1, and R1 is a methyl group, R2 to R4 are hydrogen, and n1 and n2 are both 6.

[0087] In one example, in the precursor liquid crystal layer, the mass content of the first liquid crystal monomer is between 8.5% and 9.0%.

[0088] In one example, in the precursor liquid crystal layer, the mass content of the second liquid crystal monomer is between 9.0% and 9.5%.

[0089] In one example, the precursor liquid crystal layer further contains a diluent. Optionally, the mass content of the diluent is between 70% and 85%, for example, the mass content of the diluent is 80% to 80.5%. Optionally, the diluent is selected from cyclohexanone.

[0090] Optionally, the precursor liquid crystal layer further contains one or more of a chiral agent, a photoinitiator and an antioxidant.

[0091] In one example, in the precursor liquid crystal layer, the mass content of the chiral agent is between 0.5% and 1.0%.

[0092] In one example, in the precursor liquid crystal layer, the mass content of the photoinitiator is between 0.5% and 1.0%.

[0093] In one example, in the precursor liquid crystal layer, the photoinitiator is 2-methyl-2-(4-morphinyl)

[0094] -1-[4-(Methylthio)phenyl]-1-propanone.

[0095] In one example, in the precursor liquid crystal layer, the antioxidant includes a first antioxidant and a second antioxidant, wherein the material of the first antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, and the material of the second antioxidant is 2.6-di-tert-butyl-4-methylphenol.

[0096] In one example, in the precursor liquid crystal layer, the mass content of the first antioxidant is in the range of 0.02% to 0.05%.

[0097] In one example, in the precursor liquid crystal layer, the mass content of the first antioxidant is in the range of 0.05% to 0.10%.

[0098] In one example, the precursor liquid crystal liquid can be coated on the surface of the alignment layer OA to form a precursor liquid crystal layer, and the arrangement direction of the liquid crystal monomers in the precursor liquid crystal layer matches the alignment angles of the corresponding first alignment unit OA1 and the second alignment unit OA2; then the diluent in the precursor liquid crystal layer is removed by a vacuum drying process to obtain a relatively uniform film. Then, the liquid crystal monomers are polymerized by ultraviolet light irradiation, and then the morphology of the polymerized liquid crystal layer PLC is fixed by post-baking, thereby obtaining a first wave plate unit PLC1 that matches the first alignment unit OA1 and a second wave plate unit PLC2 that matches the second alignment unit OA2.

[0099] In an example, the thickness of the polymerized liquid crystal layer PLC is between 0.6 and 1.5 micrometers, for example, the thickness of the polymerized liquid crystal layer PLC is between 0.8 and 1.0 micrometers.

[0100] In one example, the thickness of the precursor liquid crystal layer can be adjusted so that the first wave plate unit PLC1 is a first quarter wave plate unit and the second wave plate unit PLC2 is a second quarter wave plate unit. Of course, as needed, the thickness of the polymerized liquid crystal layer PLC can also be adjusted so that the first wave plate unit PLC1 and the second wave plate unit PLC2 are not limited to quarter wave plate units, but can be presented as wave plates of other degrees.

[0101] In one embodiment of the present disclosure, see Fig.10 , the glass-based phase retardation film GPR further includes a black matrix layer BM located between the glass substrate BP and the alignment layer OA; the black matrix layer BM has a light-shielding portion and a light-transmitting region; the orthographic projection of the boundary line between the first wave plate unit PLC1 and the second wave plate unit PLC2 on the glass substrate BP is within the orthographic projection of the light-shielding portion of the black matrix layer BM on the glass substrate BP. In this embodiment, the black matrix layer BM is provided in the boundary region between the first area CA1 and the second area CA2, which can avoid interference between the left-eye pattern and the right-eye pattern and improve the display effect.

[0102] In one example, the black matrix layer BM can be made of black organic material, for example, a black organic material with a thickness of 0.8 microns can be used. When the thickness of the black matrix layer BM is too thin, the problem of broken wires is prone to occur during the preparation of the black matrix layer BM. However, the thickness of the black matrix layer BM made of organic material is too large compared to the thickness of the alignment layer OA. When the alignment layer OA is formed, there is an obvious slope between the light-shielding portion and the light-transmitting region of the black matrix layer BM. During the subsequent preparation of the alignment layer OA and the polymerized liquid crystal layer PLC, there is an obvious difference in thermal conductivity between the light-transmitting region and the light-shielding portion of the black matrix layer BM, which reduces the film forming quality of the alignment layer OA and the polymerized liquid crystal layer PLC.

[0103] In another example of the present disclosure, the thickness of the light shielding portion of the black matrix layer BM is not greater than 100 nm and the light transmittance is not greater than 30%. In this example, the thickness of the black matrix layer BM can be reduced to reduce the slope of the alignment layer OA between the light shielding portion and the light transmitting region of the black matrix layer BM, thereby improving the flatness of the alignment layer OA and the polymerized liquid crystal layer PLC, which is conducive to improving the quality of the alignment layer OA and the polymerized liquid crystal layer PLC.

[0104] In an optional manner of this example, the material of the light shielding portion of the black matrix layer BM is metal, alloy or opaque metal oxide. In other words, the light shielding effect of the black matrix layer BM can be improved and the height of the black matrix layer BM can be reduced by using a highly light shielding material instead of an organic material.

[0105] For example, the thickness of the black matrix layer BM may be between 20 nm and 50 nm, such as 40 nm; the material of the black matrix layer BM is an opaque metal oxide, such as black molybdenum oxide.

[0106] In one embodiment of the present disclosure, see Fig.11 , the glass-based phase retardation film GPR also includes a transparent conductive layer CL located on the side of the glass substrate BP away from the alignment layer OA. When forming the polymerized liquid crystal layer PLC, static electricity will inevitably be generated on the substrate. The existence of static electricity will seriously interfere with the alignment of the liquid crystal monomers in the preparation process of the polymerized liquid crystal layer PLC, resulting in serious de-alignment problems of the liquid crystal monomers. In this embodiment, by providing a transparent conductive layer, static electricity can be promptly discharged, thereby avoiding the influence of static electricity catalyzing the alignment of the liquid crystal monomers. At the same time, the conductive layer is a transparent conductive layer, which will not interfere with the normal display of the display device.

[0107] In one example, the material of the transparent conductive layer may be ITO with a thickness of 200 nm. At a certain viewing angle, the reflective property of the ITO layer is more prominent, and the mirror reflection problem generated by it will reduce the display effect.

[0108] In another example, the material of the transparent conductive layer is PEDOT (poly 3,4-ethylenedioxythiophene). The PEDOT layer is not only transparent and conductive, but also has a low reflectivity. The 3-position and 4-position of PEDOT are both substituted by side groups, and the polymerization reaction can only be carried out at the 2-position and 5-position, so the resulting polymer is a linear (non-cross-linked) polymer with few conjugated defects; and the ether substituents reduce the oxidation potential of the monomer and polymer, making it easier to polymerize and more stable during the redox (doping and dedoping) cycle. Compared with other conductive polymers, PEDOT also has the advantages of high conductivity, high stability and high transparency. The conductivity of PEDOT obtained by spin coating or casting can reach 550S / Cm; the polymer obtained by gas phase polymerization can reach more than 1000S / Cm. PEDOT has high stability in the oxidized state, and its conductivity remains basically unchanged at 120°C for 1000h. PEDOT is transparent in the oxidized state.

[0109] In one implementation of this example, the thickness of the transparent conductive layer is not less than 300 angstroms. When the thickness of the PEDOT layer reaches 300 angstroms, the anti-reflection effect is very obvious, which can significantly improve the display effect.

[0110] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A glass-based phase retardation film, characterized in that: The invention comprises a glass substrate and an alignment layer which are stacked in sequence, and a polymerized liquid crystal layer which is arranged on the alignment layer away from the surface of the glass substrate; wherein the glass-based phase retardation film has a first region and a second region which are alternately arranged, the alignment layer comprises a first alignment unit located in the first region and a second alignment unit located in the second region; the polymerized liquid crystal layer comprises a first wave plate unit located in the first region and a second wave plate unit located in the second region; The fast axis direction of the first wave plate unit is perpendicular to the fast axis direction of the second wave plate unit.

2. The glass-based phase retardation film according to claim 1, characterized in that: The glass-based phase retardation film further comprises a black matrix layer located between the glass substrate and the alignment layer; the black matrix layer comprises a light shielding portion and a light transmitting region; An orthographic projection of a boundary line between the first wave plate unit and the second wave plate unit on the glass substrate is located within an orthographic projection of a light shielding portion of the black matrix layer on the glass substrate.

3. The glass-based phase retardation film according to claim 2, characterized in that: The thickness of the light shielding portion of the black matrix layer is not greater than 100 nm and the light transmittance is not greater than 30%.

4. The glass-based phase retardation film according to claim 3, characterized in that: The material of the light shielding portion of the black matrix layer is metal, alloy or opaque metal oxide.

5. The glass-based phase retardation film according to claim 3, characterized in that: The thickness of the black matrix layer is between 20nm and 50nm, and the material is an opaque metal oxide.

6. The glass-based phase retardation film according to claim 1, characterized in that: The glass-based phase retardation film further includes a transparent conductive layer located on a side of the glass substrate away from the alignment layer.

7. The glass-based phase retardation film according to claim 6, characterized in that: The material of the transparent conductive layer is PEDOT.

8. The glass-based phase retardation film according to claim 7, characterized in that: The thickness of the transparent conductive layer is not less than 300 angstroms.

9. The glass-based phase retardation film according to claim 1, characterized in that: The polymerized liquid crystal layer is formed by solidifying a precursor liquid crystal layer; the precursor liquid crystal layer has at least one liquid crystal monomer, and the structural formula of the at least one liquid crystal monomer is shown in Chemical Formula 1: wherein R1 to R4 are each independently selected from hydrogen, deuterium, methyl, ethyl, isopropyl, and methoxy; n1 and n2 are each independently selected from integers of 3 to 10; The liquid crystal monomers are polymerized under light or heating conditions to generate the polymerized liquid crystal layer.

10. The glass-based phase retardation film according to claim 9, characterized in that: The precursor liquid crystal layer has at least two liquid crystal monomers, and the structural formula of each of the liquid crystal monomers is as shown in Chemical Formula 1.

11. The glass-based phase retardation film according to claim 1, characterized in that: The first wave plate unit is a first quarter wave plate unit, and the second wave plate unit is a second quarter wave plate unit.

12. The glass-based phase retardation film according to claim 1, characterized in that: An alignment direction of the first alignment unit is perpendicular to an alignment direction of the second alignment unit.

13. A display device, characterized in that It comprises a display module and a glass-based phase delay film according to any one of claims 1 to 12 arranged on the light-emitting surface side of the display module; wherein the display module can emit linearly polarized light, and the polarization direction of the linearly polarized light differs by 45° from the fast axis direction of the first wave plate unit and the fast axis direction of the second wave plate unit.

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