Display panel, preparation method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a preparation method thereof and a display device. The display panel comprises a first substrate and a second substrate arranged oppositely, a liquid crystal layer, a first polarizer located on a side of the first substrate away from the liquid crystal layer, a first compensation film located on a side of the first polarizer close to the first substrate, a second polarizer located on a side of the second substrate away from the liquid crystal layer, and a second compensation film located on a side of the second polarizer close to the second substrate. The first compensation film and the second compensation film are used to adjust the polarization state of light. When high gray scale needs to be displayed, the light is emitted from the second polarizer after being adjusted by the first compensation film, the second compensation film and the liquid crystal layer. When low gray scale needs to be displayed, the light is absorbed by the second polarizer after being adjusted by the first compensation film, the second compensation film and the liquid crystal layer. The embodiments of the present application can solve the problem of low transmittance of the display panel after the thickness of the liquid crystal cell is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] With the rise of the metaverse, displays require higher resolutions and faster refresh rates to match the demands of VR (Virtual Reality). For LCD (Liquid Crystal Display) products, since the response time of an LCD largely depends on the thickness of the liquid crystal cell, existing LCD products designed for VR can reduce the LCD's response time by decreasing the cell thickness, thereby achieving the high refresh rate requirements.

[0003] However, as the thickness of the liquid crystal cell decreases, the effective optical path difference under power will be insufficient. Insufficient effective optical path difference will lead to low liquid crystal efficiency and low liquid crystal transmittance, which in turn will affect the transmittance of the display panel. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a display panel, its manufacturing method, and a display device to solve the technical problem of low transmittance of the display panel after the thickness of the liquid crystal cell is reduced.

[0005] To address the aforementioned problems, the embodiments of this application mainly provide the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a display panel, comprising: a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer located between the first substrate and the second substrate; further comprising a first polarizer and a second polarizer, a first compensation film and a second compensation film; the first polarizer is located on the side of the first substrate away from the liquid crystal layer; the first compensation film is located on the side of the first polarizer close to the first substrate; the second polarizer is located on the side of the second substrate away from the liquid crystal layer; the second compensation film is located on the side of the second polarizer close to the second substrate; wherein: the first compensation film and the second compensation film are used to adjust the polarization state of light, such that when a high grayscale needs to be displayed, the light after passing through the first polarizer is adjusted by the first compensation film, the second compensation film and the liquid crystal layer and emitted from the second polarizer; and when a low grayscale needs to be displayed, the light after passing through the first polarizer is adjusted by the first compensation film, the second compensation film and the liquid crystal layer and absorbed by the second polarizer.

[0007] Optionally, the liquid crystal layer comprises liquid crystal molecules; the transmission axis of the first polarizer is parallel to the initial orientation of the liquid crystal molecules, or the transmission axis of the first polarizer is perpendicular to the initial orientation of the liquid crystal molecules; the transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizer.

[0008] Optionally, the optical axis of the first compensation film forms a 45° angle with the initial orientation of the liquid crystal molecules; the optical axis of the second compensation film forms a 45° angle with the initial orientation of the liquid crystal molecules; and the optical axis of the first compensation film and the optical axis of the second compensation film are parallel to each other.

[0009] Optionally, the optical path difference generated by light passing through the first compensation film is equal to the optical path difference generated by light passing through the second compensation film.

[0010] Optionally, the optical path difference generated by the light passing through the first compensation film is 10nm-100nm; the optical path difference generated by the light passing through the second compensation film is 10nm-100nm.

[0011] Optionally, the material of the first compensation membrane is the same as the material of the second compensation membrane.

[0012] Optionally, the first compensation membrane is an A-plate type compensation membrane; the second compensation membrane is an A-plate type compensation membrane.

[0013] Optionally, the first substrate includes a substrate, a common electrode and a pixel electrode that are mutually insulated and located on the side of the substrate near the liquid crystal layer; the common electrode and the pixel electrode are used to generate a lateral electric field parallel to the first substrate.

[0014] Secondly, embodiments of this application provide a display device, including: a display panel as described in the first aspect.

[0015] Thirdly, embodiments of this application provide a method for manufacturing a display panel, comprising: fabricating a first substrate and a second substrate, assembling the first substrate and the second substrate together, and fabricating a liquid crystal layer between the first substrate and the second substrate; forming a first compensation film on a first polarizer, forming a second compensation film on a second polarizer, and attaching the first polarizer with the first compensation film to the side of the first substrate away from the liquid crystal layer, such that the first compensation film is located between the first substrate and the first polarizer; and attaching the second polarizer with the second compensation film to the side of the second substrate away from the liquid crystal layer, such that the second compensation film is located between the second substrate and the second polarizer; or, forming the first compensation film on the side of the first substrate away from the liquid crystal layer, forming the second compensation film on the side of the second substrate away from the liquid crystal layer; and attaching the first polarizer to the side of the first compensation film away from the liquid crystal layer, and attaching the second polarizer to the side of the second compensation film away from the liquid crystal layer.

[0016] The beneficial technical effects of the technical solutions provided in this application include:

[0017] The display panel provided in this application embodiment has a first compensation film disposed on the side of the first polarizer near the first substrate, and a second compensation film disposed on the side of the second polarizer near the second substrate. On one hand, when high grayscale is required, the combined modulation of the liquid crystal layer, the first compensation film, and the second compensation film ensures that light is emitted from the second polarizer, solving the problem of insufficient effective optical path difference in the liquid crystal layer. When low grayscale is required, the combined modulation of the liquid crystal layer, the first compensation film, and the second compensation film ensures that light is absorbed by the second polarizer, preventing dark-state light leakage. Furthermore, reducing the liquid crystal cell thickness to a certain extent does not cause a weakening of the display panel's liquid crystal dimming capability or low transmittance, which is beneficial for achieving the requirements of low cell thickness and high refresh rate in the product.

[0018] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of the embodiments of this application are described below. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of alternative embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a display panel based on related technologies;

[0021] Figure 2 A schematic diagram of a Bonga sphere in a display panel for related technologies;

[0022] Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram of the refractive index of a compensation film for a display panel provided in an embodiment of this application;

[0024] Figures 5-6 A schematic diagram of a Bonga sphere for a display panel provided in an embodiment of this application;

[0025] Figure 7 A comparison diagram of the effect of a display panel provided in an embodiment of this application;

[0026] Figure 8 This is a schematic flowchart of a display panel manufacturing method provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-First substrate; 2-Second substrate; 3-Liquid crystal layer; 4-First polarizer; 5-Second polarizer; 6-First compensation film; 7-Second compensation film. Detailed Implementation

[0029] This application is described in detail below. Examples of embodiments of this application are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Furthermore, detailed descriptions of known technologies that are unnecessary for the features of this application are omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0031] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0032] The light modulation capability of an LCD monitor is limited by the thickness of the liquid crystal cell. Within a certain range of cell thickness, a thicker cell results in stronger light modulation capability, higher grayscale transmittance, and higher achievable contrast. However, increasing the cell thickness inevitably leads to a longer response time. If the response time of the display panel is reduced by decreasing the thickness of the liquid crystal cell, it will result in weakened dimming capability and lower transmittance.

[0033] The following is combined with Figure 1 This section introduces in-plane switching liquid crystal displays (IPS-LCD). Figure 1 A display panel according to related technology, the display panel is provided with a first polarizer 4, a first substrate 1, a liquid crystal layer 3, a second substrate 2 and a second polarizer 5 arranged sequentially from bottom to top; specifically, the first substrate 1 is an array substrate, the second substrate 2 is a color filter substrate, the display panel is a liquid crystal display panel driven by a lateral electric field, the initial alignment angle of the liquid crystals included in the first polarizer 4 and the liquid crystal layer 3 is parallel, and the second polarizer 5 is placed orthogonally to the first polarizer 4.

[0034] Taking the transmission axis of the first polarizer 4 as 0° as an example, the light becomes 0° polarized light after passing through the first polarizer 4. When no voltage is applied to the electrodes on the first substrate 1, the liquid crystal does not deflect. The polarization direction of the 0° polarized light does not change after passing through the 0° oriented liquid crystal layer, and is therefore absorbed by the second polarizer 5 placed at 90°. The display panel displays a relatively pure black, achieving a dark state, i.e., L0 grayscale. When a voltage is applied to the electrodes on the first substrate 1, the horizontally oriented liquid crystal molecules undergo in-plane deflection under the action of the transverse electric field. When the liquid crystal molecules rotate 45° and the effective optical path difference through the liquid crystal layer is 1 / 2 times the designed dominant wavelength, the 0° polarized light is modulated by the liquid crystal layer into 90° linearly polarized light. At this time, the 90° linearly polarized light can be emitted from the second polarizer 5, thus achieving a bright state, i.e., L255 grayscale.

[0035] Typically, to ensure that the liquid crystal has an effective optical path difference of 1 / 2 times the designed main wavelength in the 45° direction when the L255 grayscale is in operation, the optical path difference of the liquid crystal in the initial state is usually set to be greater than 1 / 2 times the designed main wavelength, so that the liquid crystal modulates the positively polarized light in the horizontal direction to the vertical direction under the action of the electric field.

[0036] To reduce the response time of LCD products used in VR, the thickness of the liquid crystal cell is generally made smaller. While reducing the cell thickness improves the response time, it also results in the effective optical path at 45° being less than half the designed main wavelength when power is applied. In this case, it becomes impossible to modulate 0° polarized light to 90°. Figure 2 As indicated by the arrow, this will lead to low liquid crystal efficiency and low liquid crystal transmittance, which in turn will affect the transmittance of the display panel.

[0037] In view of the technical problem of insufficient liquid crystal modulation caused by the decrease in liquid crystal cell thickness in the current related technologies, the present application provides a display panel to compensate for insufficient liquid crystal modulation in order to improve the transmittance of the display panel.

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0039] The following is a description of the terminology used in this application:

[0040] In the display industry, grayscale represents the different brightness levels between the darkest and brightest areas of a display. Taking 256 grayscale levels (L0 to L255) as an example, each grayscale level corresponds to a brightness level. Larger grayscale values ​​are called high grayscale, for example, the range of high grayscale is 178-255 grayscale; smaller grayscale values ​​are called low grayscale, for example, the range of grayscale is 0-25 grayscale.

[0041] This application provides a display panel, such as... Figure 3As shown, the display panel includes: a first substrate 1 and a second substrate 2 disposed opposite to each other, and a liquid crystal layer 3 located between the first substrate 1 and the second substrate 2; it also includes a first polarizer 4, a second polarizer 5, a first compensation film 6, and a second compensation film 7; the first polarizer 4 is located on the side of the first substrate 1 away from the liquid crystal layer 3; the first compensation film 6 is located on the side of the first polarizer 4 close to the first substrate 1; the second polarizer 5 is located on the side of the second substrate 2 away from the liquid crystal layer 3; and the second compensation film 7 is located on the side of the second polarizer 5 close to the second substrate 2. Wherein: the first compensation film 6 and the second compensation film 7 are used to adjust the polarization state of light, so that when a high grayscale is required, the light after passing through the first polarizer 4 is adjusted by the first compensation film 6, the second compensation film 7, and the liquid crystal layer 3 and then emitted from the second polarizer 5. And when a low grayscale is required, the light after passing through the first polarizer 4 is adjusted by the first compensation film 6, the second compensation film 7, and the liquid crystal layer 3 and then absorbed by the second polarizer 5.

[0042] It should be noted that in the embodiments of this application, the low gray level refers to the L0 gray level, and the high gray level can include gray levels within L178-L255. When the high gray level refers to the L255 gray level, the light after passing through the first polarizer 4 is adjusted by the first compensation film 6, the second compensation film 7 and the liquid crystal layer 3, and then all of it is emitted from the second polarizer 5 to achieve a bright state.

[0043] In some specific embodiments, the optical path difference of light passing through the liquid crystal layer is less than or equal to half of the designed wavelength. It is understood that the optical path difference of light passing through the liquid crystal layer can also be slightly greater than half of the designed main wavelength. It should be noted that the optical path difference of light passing through the liquid crystal layer refers to the initial optical path difference of the liquid crystal, not the effective optical path difference of the liquid crystal. This embodiment does not require the optical path difference of light passing through the liquid crystal layer 3 to be greater than 1 / 2 of the designed main wavelength. When the optical path difference of light passing through the liquid crystal layer is less than or equal to half of the designed wavelength, the horizontally polarized light can be converted into vertically polarized light through the joint modulation of the liquid crystal layer 3, the first compensation film 6, and the second compensation film 7, achieving high grayscale display. It is understood that without the first compensation film 6 and the second compensation film 7, if the optical path difference of light passing through the liquid crystal layer 3 is less than 1 / 2 of the designed main wavelength, applying a voltage to both sides of the liquid crystal will result in an optical path difference of light passing through the liquid crystal layer 3 such that... Figure 2 As shown by arrow 1, the effective optical path difference of the liquid crystal is insufficient, making it impossible to deflect horizontally polarized light into vertically polarized light.

[0044] In one specific embodiment, the first substrate 1 further includes a substrate, a common electrode and a pixel electrode located on the side of the substrate near the liquid crystal layer 3 and insulated from each other; the common electrode and the pixel electrode are used to generate a lateral electric field parallel to the first substrate 1. When a voltage is applied, the common electrode and the pixel electrode generate a lateral electric field parallel to the first substrate 1, and the horizontally oriented liquid crystal can be deflected under the action of the lateral electric field. By changing the magnitude of the electric field applied to both sides of the liquid crystal molecules, the amount of polarized light can be controlled, thereby achieving the purpose of controlling the light; the arrangement of the common electrode and the pixel electrode is similar to that of the prior art and will not be described in detail here.

[0045] In one specific embodiment, the first compensation film 6 is an A-plate type compensation film; the second compensation film 7 is an A-plate type compensation film. An A-plate type compensation film is an optical film with a rod-shaped refractive index distribution. The refractive index of an A-plate type compensation film refers to the fact that it has a maximum refractive index in one direction, and the same refractive index in the other two orthogonal directions, with the refractive indices in the other two orthogonal directions being less than the maximum refractive index. The direction with the maximum refractive index is the optical axis direction of the A-plate type compensation film, such as... Figure 4 As shown, Figure 4 The maximum refractive index of an optical film with a medium refractive index rod distribution is in the X direction, while the refractive indices in the Y and Z directions are the same. Therefore, the optical axis of this A-plate type compensation film is in the X direction, or in other words, 0° in-plane. When this A-plate type compensation film is rotated 45° in-plane, it becomes an A-plate type compensation film with a 45° optical axis distribution.

[0046] Specifically, such as Figure 4 As shown, both the first compensation film 6 and the second compensation film 7 are positive A-plate type compensation films. The first compensation film 6 satisfies the optical condition: nx1 > ny1 = nz1; where: nx1 represents the refractive index in the X-axis direction on the surface of the first compensation film 6; ny1 represents the refractive index in the Y-axis direction on the surface of the first compensation film 6; and nz1 represents the refractive index in the Z-axis direction on the thickness of the first compensation film 6. The second compensation film 7 satisfies the optical condition: nx2 > ny2 = nz2; where: nx2 represents the refractive index in the X-axis direction on the surface of the second compensation film 7; ny2 represents the refractive index in the Y-axis direction on the surface of the second compensation film 7; and nz2 represents the refractive index in the Z-axis direction on the thickness of the second compensation film 7.

[0047] In one specific embodiment, the optical path difference generated by light passing through the first compensation film 6 is equal to the optical path difference generated by light passing through the second compensation film 7. Specifically, the in-plane optical path difference of the first compensation film 6 satisfies the condition: K1 = (nx1 - ny1) * t1, where: nx1 represents the refractive index in the X-axis direction on the surface of the first compensation film 6; ny1 represents the refractive index in the Y-axis direction on the surface of the first compensation film 6; and t1 is the thickness of the first compensation film 6. The in-plane optical path difference of the second compensation film 7 satisfies the condition: K2 = (nx2 - ny2) * t2, where: nx2 represents the refractive index in the X-axis direction on the surface of the second compensation film 7; ny2 represents the refractive index in the Y-axis direction on the surface of the second compensation film 7; and t2 is the thickness of the second compensation film 7.

[0048] Of course, the first compensation film 6 and the second compensation film 7 can be compensation films with the same refractive index in all directions, i.e., nx1 = nx2 and ny1 = ny2. According to the conditions satisfied by the optical path difference between the first compensation film 6 and the second compensation film 7, when the optical path difference between the first compensation film 6 and the second compensation film 7 is the same, the thickness of the first compensation film 6 and the thickness of the second compensation film 7 are also the same. In the specific fabrication process, only the optical axis directions of the first compensation film 6 and the second compensation film 7 need to be considered, reducing the difficulty of the fabrication process. It is understandable that as long as the optical path difference between the first compensation film 6 and the second compensation film 7 is the same in-plane, the technical solution can be achieved.

[0049] In one specific embodiment, the material of the first compensation film 6 is the same as the material of the second compensation film 7. When the materials of the first compensation film 6 and the second compensation film 7 are the same, the manufacturing process of the display panel is less difficult. It is understood that the materials of the first compensation film 6 and the second compensation film 7 do not have to be the same. As mentioned above, as long as the optical path difference between the first compensation film 6 and the second compensation film 7 in the plane is the same, the technical solution can be achieved.

[0050] In one specific embodiment, the optical path difference generated by light passing through the first compensation film 6 is 10nm-100nm, i.e., K1 = 10nm-100nm; the optical path difference generated by light passing through the second compensation film 7 is 10nm-100nm, i.e., K2 = 10nm-100nm. Specifically, when the optical path difference generated by light passing through the first compensation film 6 or the second compensation film 7 is less than 10nm or greater than 100nm, the effective optical path difference of the liquid crystal layer 3 is insufficient, and the joint modulation of the liquid crystal layer 3, the first compensation film 6, and the second compensation film 7 is difficult to meet the requirement of modulating horizontally polarized light into vertically polarized light. Optionally, the optical path difference of light passing through the first compensation film 6 and the second compensation film 7 can be set to 40nm-60nm, which can further optimize the joint modulation effect of the liquid crystal layer 3, the first compensation film 6, and the second compensation film 7.

[0051] In one specific embodiment, the liquid crystal layer 3 includes liquid crystal molecules. Specifically, the initial orientation of the liquid crystal molecules and the extension direction of the pixel electrode slit have a preset angle, which can be adjusted according to actual needs. The transmission axis of the first polarizer 4 is parallel to the initial orientation of the liquid crystal molecules, or the transmission axis of the first polarizer 4 is perpendicular to the initial orientation of the liquid crystal molecules; the transmission axis of the second polarizer 5 is perpendicular to the transmission axis of the first polarizer 4.

[0052] In one specific embodiment, the optical axis of the first compensation film 6 forms a 45° angle with the initial orientation of the liquid crystal molecules; the optical axis of the second compensation film 7 forms a 45° angle with the initial orientation of the liquid crystal molecules; and the optical axis of the first compensation film 6 and the optical axis of the second compensation film 7 are perpendicular to each other.

[0053] Specifically, taking the first polarizer 4 as a reference, and assuming the transmission axis angle of the first polarizer 4 is 0°, the angles of the other layers relative to the transmission axis of the first polarizer 4 are as follows:

[0054] First compensation film 6: Optical axis direction +45°;

[0055] Liquid crystal layer 3: 0° in the optical axis direction;

[0056] Second compensation film 7: Optical axis direction +45°;

[0057] Second polarizer 5: Optical axis direction 90°.

[0058] The light rays are converted into 0° linearly polarized light after passing through the first polarizer and then emitted.

[0059] When no voltage is applied to the liquid crystal layer, such as Figure 5 As shown in the diagram, 0° linearly polarized light generates a first optical path difference when passing through the first compensation film 6 (as indicated by the upward straight arrow 2 in the diagram). When the polarized light passes through the liquid crystal layer 3, a second optical path difference is generated (as indicated by the downward curved arrow 3 in the diagram). When the light passes through the second compensation film 7, a third optical path difference is generated (as indicated by the upward straight arrow 4 in the diagram), returning to the initial deflection state of 0°. The 0° polarized light is absorbed by the second polarizer 5, whose transmission axis is 90°, achieving a dark state, i.e., the L0 grayscale.

[0060] When a voltage is applied to the liquid crystal layer, such as Figure 6As shown in the diagram, 0° linearly polarized light experiences a first optical path difference when passing through the first compensation film 6 (as indicated by the upward arc arrow 5 in the diagram). The light then experiences a second optical path difference when passing through the liquid crystal layer 3 (as indicated by the downward arc arrow 6 in the diagram). Finally, the light experiences a third optical path difference when passing through the second compensation film 7 (as indicated by the downward arc arrow 7 in the diagram). The combined modulation of the first compensation film 6, the liquid crystal layer 3, and the second compensation film 7 deflects the light from 0° to 90°, allowing it to exit through the second polarizer 5 with a transmission axis of 90°, achieving a bright state, i.e., the L255 grayscale.

[0061] Specifically, taking the example where the optical path difference of light passing through the liquid crystal layer equals the designed dominant wavelength: In the initial state, the optical path difference of the liquid crystal layer is R (R = Δn * d, where Δn represents the difference in refractive index between two orthogonal directions within the liquid crystal molecule plane, and d represents the thickness of the liquid crystal cell). The optical path difference R is equal to half of the designed dominant wavelength, where Δn = 0.2, d = 1.375 micrometers, and the designed dominant wavelength is 550 nm. Without the first compensation film 6 and the second compensation film 7, since R = Δn * d = 0.2 * 1.375 micrometers = 550 / 2 nm, after applying voltage, the effective optical path difference of the liquid crystal is less than half of the designed dominant wavelength, making it impossible to modulate 0° polarized light to 90°. After setting the first compensation film 6 and the second compensation film 7 in the display panel, the 0° polarized light, through the combined modulation of the liquid crystal layer 3, the first compensation film 6, and the second compensation film 7, can be modulated to 90°. Figure 7 To set up a transmittance comparison diagram of the display panel before and after the first compensation film 6 and the second compensation film 7, as shown in the figure... Figure 7 As shown, by providing a first compensation film 6 and a second compensation film 7 on both sides of the first substrate 1 and the second substrate 2 respectively, the maximum transmittance of the display panel is increased by 40%.

[0062] Based on the same inventive concept, this application provides a display device including the aforementioned display panel. Since the display device includes the aforementioned display panel, it possesses the same beneficial technical effects as the aforementioned display panel. Therefore, the beneficial effects of the display device will not be repeated here.

[0063] Based on the same inventive concept, embodiments of this application provide a method for manufacturing a display panel, such as... Figure 8 As shown, the preparation method includes:

[0064] S101. Fabricate a first substrate 1 and a second substrate 2, assemble the first substrate 1 and the second substrate 2, and fabricate a liquid crystal layer 3 between the first substrate 1 and the second substrate 2.

[0065] S102. A first compensation film 6 is formed on the first polarizer 4, a second compensation film 7 is formed on the second polarizer 5, and the first polarizer 4 with the first compensation film 6 is attached to the side of the first substrate 1 away from the liquid crystal layer 3, so that the first compensation film 6 is located between the first substrate 1 and the first polarizer 4, and the second polarizer 5 with the second compensation film 7 is attached to the side of the second substrate 2 away from the liquid crystal layer 3, so that the second compensation film 7 is located between the second substrate 2 and the second polarizer 5.

[0066] Alternatively, a first compensation film 6 is formed on the side of the first substrate 1 away from the liquid crystal layer 3, and a second compensation film 7 is formed on the side of the second substrate 2 away from the liquid crystal layer 3; and a first polarizer 4 is attached to the side of the first compensation film 6 away from the liquid crystal layer 3, and a second polarizer 5 is attached to the side of the second compensation film 7 away from the liquid crystal layer 3.

[0067] Specifically, the manufacturing method of S101 in this embodiment is similar to that of the prior art, and will not be repeated here.

[0068] In the above S102 embodiment of this application, the first compensation film can be integrated onto the first polarizer. Specifically, the first compensation film 6 is integrated onto one side of the first polarizer 4; similarly, the second compensation film 7 is integrated onto one side of the second polarizer 5. The first polarizer 4 with the first compensation film 6 integrated and the second polarizer 5 with the second compensation film 7 integrated are respectively attached to the first substrate 1 and the second substrate 2. Specifically, the side of the first compensation film away from the first polarizer is attached to the side of the first substrate away from the liquid crystal layer; the side of the second compensation film away from the second polarizer is attached to the side of the second substrate away from the liquid crystal layer.

[0069] The first compensation film 6 can also be integrated on the first substrate 1. Specifically, the first compensation film 6 is formed on the side of the first substrate 1 away from the liquid crystal layer 3, and then the first polarizer 4 is attached to the side of the first compensation film 6 away from the liquid crystal layer 3; similarly, the second compensation film 7 is formed on the side of the second substrate 2 away from the liquid crystal layer 3, and the second polarizer 5 is attached to the side of the second compensation film 7 away from the liquid crystal layer 3.

[0070] By applying the embodiments of this application, at least the following beneficial effects can be achieved:

[0071] In the display panel provided in this application embodiment, a first compensation film is disposed on the side of the first polarizer close to the first substrate, and a second compensation film is disposed on the side of the second polarizer close to the second substrate. On one hand, when high grayscale is required, the combined modulation of the liquid crystal layer, the first compensation film, and the second compensation film allows light to be emitted from the second polarizer, solving the problem of insufficient effective optical path difference in the liquid crystal layer. When low grayscale is required, the combined modulation of the liquid crystal layer, the first compensation film, and the second compensation film allows light to be absorbed by the second polarizer, preventing dark-state light leakage. Furthermore, reducing the liquid crystal cell thickness to a certain extent does not cause a weakening of the display panel's liquid crystal dimming capability or low transmittance, which is beneficial for achieving the product's requirements of low cell thickness and high refresh rate.

[0072] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0073] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0076] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0077] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0078] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: A first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer located between the first substrate and the second substrate; The first polarizer is located on the side of the first substrate away from the liquid crystal layer; The first compensation film is located on the side of the first polarizer closest to the first substrate; The second polarizer is located on the side of the second substrate away from the liquid crystal layer; The second compensation film is located on the side of the second polarizer closest to the second substrate; Wherein: the first compensation film and the second compensation film are used to adjust the polarization state of the light so that when a high grayscale needs to be displayed, the light after passing through the first polarizer is adjusted by the first compensation film, the second compensation film and the liquid crystal layer and then emitted from the second polarizer; And when a low grayscale needs to be displayed, the light after passing through the first polarizer is adjusted by the first compensation film, the second compensation film and the liquid crystal layer and then absorbed by the second polarizer; The optical path difference generated by light passing through the first compensation film is 10nm-100nm; The optical path difference generated by light passing through the second compensation film is 10nm-100nm; The liquid crystal layer comprises liquid crystal molecules; The transmission axis of the first polarizer is parallel to the initial orientation of the liquid crystal molecules, or the transmission axis of the first polarizer is perpendicular to the initial orientation of the liquid crystal molecules. The transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizer; The optical axis of the first compensation film forms a 45° angle with the initial orientation of the liquid crystal molecules; The optical axis of the second compensation film forms a 45° angle with the initial orientation of the liquid crystal molecules; The optical axis of the first compensation film is parallel to the optical axis of the second compensation film.

2. The display panel according to claim 1, characterized in that, The optical path difference generated by light passing through the first compensation film is equal to the optical path difference generated by light passing through the second compensation film.

3. The display panel according to any one of claims 1-2, characterized in that, The material of the first compensation membrane is the same as that of the second compensation membrane.

4. The display panel according to claim 3, characterized in that, The first compensation membrane is an A-plate type compensation membrane; The second compensation membrane is an A-plate type compensation membrane.

5. The display panel according to claim 1, characterized in that, The first substrate includes a substrate, a common electrode and a pixel electrode that are mutually insulated and located on the side of the substrate near the liquid crystal layer; The common electrode and the pixel electrode are used to generate a lateral electric field parallel to the first substrate.

6. A display device, characterized in that, Includes the display panel as described in any one of claims 1-5.

7. A method for preparing a display panel as described in any one of claims 1-5, characterized in that, include: A first substrate and a second substrate are fabricated, and the first substrate and the second substrate are assembled together, and a liquid crystal layer is fabricated between the first substrate and the second substrate; A first compensation film is formed on the first polarizer, a second compensation film is formed on the second polarizer, and the first polarizer with the first compensation film is attached to the side of the first substrate away from the liquid crystal layer, such that the first compensation film is located between the first substrate and the first polarizer; and the second polarizer with the second compensation film is attached to the side of the second substrate away from the liquid crystal layer, such that the second compensation film is located between the second substrate and the second polarizer. Alternatively, the first compensation film is formed on the side of the first substrate away from the liquid crystal layer, and the second compensation film is formed on the side of the second substrate away from the liquid crystal layer; and the first polarizer is attached to the side of the first compensation film away from the liquid crystal layer, and the second polarizer is attached to the side of the second compensation film away from the liquid crystal layer.

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