Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a substrate, a reflection layer, a light-emitting layer, a phase retardation sheet and a light-enhancing polarizing sheet. The reflection layer is arranged on the substrate. The light-emitting layer comprises a plurality of light-emitting units and is arranged on the side of the reflection layer away from the substrate. The phase retardation sheet is arranged on the side of the light-emitting layer away from the substrate and is used for phase retarding the light emitted by the light-emitting units. The light-enhancing polarizing sheet is arranged on the side of the phase retardation sheet away from the light-emitting layer and is used for polarizing and reflecting the light phase retarded by the phase retardation sheet, allowing the first polarized light with the same polarization direction as that of the light-enhancing polarizing sheet to be emitted and reflecting the second polarized light perpendicular to the polarization direction of the light-enhancing polarizing sheet towards the phase retardation sheet. At least part of the second polarized light forms third linear polarized light towards the light-enhancing polarizing sheet under the cooperation of the phase retardation sheet and the reflection layer, and the polarization direction of the third polarized light is the same as that of the light-enhancing polarizing sheet.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] With the development of display technology, organic light-emitting diode (OLED) panels have become widely used as a new display technology. The light emission brightness of an OLED panel directly affects its display performance. Therefore, how to improve the light emission brightness of OLED panels has attracted much attention. Summary of the Invention

[0003] The purpose of this application is to provide a display panel and display device that improves light extraction efficiency to increase light extraction brightness.

[0004] This application discloses a display panel, which includes:

[0005] substrate;

[0006] A reflective layer is disposed on the substrate;

[0007] The light-emitting layer includes a plurality of light-emitting units arranged at intervals, disposed on the side of the reflective layer away from the substrate;

[0008] A phase retarder is located on the side of the light-emitting layer opposite to the substrate. The phase retarder is used to delay the phase of the light emitted by the light-emitting unit.

[0009] An enhancement polarizer is located on the side of the phase retarder away from the light-emitting layer; the enhancement polarizer is used to polarize and reflect the light after phase retardation by the phase retarder, allowing first polarized light with the same polarization direction as the enhancement polarizer to be emitted, and reflecting second polarized light with the polarization direction perpendicular to the enhancement polarizer toward the phase retarder.

[0010] Wherein, at least a portion of the second polarized light, in cooperation with the phase retarder and the reflective layer, forms a third linearly polarized light directed toward the brightness enhancement polarizer, and the polarization direction of the third polarized light is the same as that of the brightness enhancement polarizer.

[0011] In some embodiments, the phase retarder is a quarter-phase retarder, and the polarization direction of the brightness enhancement polarizer forms a 45° angle with the optical axis direction of the phase retarder.

[0012] In some embodiments, the display panel further includes a module structure layer located on the side of the brightness enhancement polarizer away from the phase retardation film, the module structure layer including a linear polarization film layer, the polarization direction of the linear polarization film layer being consistent with the polarization direction of the first polarized light.

[0013] In some embodiments, the display panel further includes a filling layer; the filling layer is located between the light-emitting layer and the phase retardation film, or the filling layer is located between the phase retardation film and the brightness enhancement polarizer, or the filling layer is located between the brightness enhancement polarizer and the module structure layer.

[0014] In some embodiments, the filling layer has a plurality of spaced-apart lens structures, each of which corresponds to a plurality of light-emitting units, and the refractive index of the lens structures is different from that of the filling layer.

[0015] In some embodiments, the module structure layer further includes a cover plate;

[0016] The cover plate is located on the side of the brightness enhancement polarizer that is opposite to the brightness enhancement polarizer.

[0017] In some embodiments, the brightness enhancement polarizer includes multiple alternating layers of first brightness enhancement polarizing film and second brightness enhancement polarizing film, wherein the refractive index difference between the first brightness enhancement polarizing film and the second brightness enhancement polarizing film in the second electric field direction is less than the refractive index difference between the first brightness enhancement polarizing film and the second brightness enhancement polarizing film in the first electric field direction.

[0018] The polarization direction of the light-enhancing polarizer is the same as the direction of the first electric field, and the polarization direction of the light-enhancing polarizer is perpendicular to the direction of the second electric field.

[0019] In some embodiments, the refractive index difference between the first and second brightness-enhancing polarizing films in the direction of the first electric field is 0.15-0.35.

[0020] In some embodiments, the display panel further includes a panel circuit layer located between the light-emitting layer and the substrate, the panel circuit layer including an anode circuit layer, the anode circuit layer serving as the reflective layer.

[0021] This application also discloses a display device that includes the aforementioned display panel.

[0022] Compared with related technologies, the display panel and display device disclosed in this application, by providing a phase retardation film and a brightness enhancement polarizer on the side of the light-emitting layer away from the substrate, allows the light emitted by the light-emitting unit to be phase-retarded by the phase retardation film and then polarized and reflected by the brightness enhancement polarizer. This results in the emission of first polarized light with the same polarization direction as the brightness enhancement polarizer, and reflection of second polarized light perpendicular to the polarization direction of the brightness enhancement polarizer toward the phase retardation film. At least a portion of the second polarized light, in cooperation with the phase retardation film and the reflective layer, forms third linearly polarized light that is directed toward the brightness enhancement polarizer. The polarization direction of the third polarized light is the same as the polarization direction of the brightness enhancement polarizer, allowing the third polarized light to be emitted from the brightness enhancement polarizer, thereby improving the light extraction efficiency and brightness of the display panel and enhancing the display effect.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0025] Figure 1 This is a cross-sectional structural diagram of a display panel provided in an exemplary embodiment of this application;

[0026] Figure 2 This is a layer structure diagram of an optical brightening polarizer provided in an exemplary embodiment of this application;

[0027] Figure 3 This is a transmittance curve of a light-enhancing polarizer provided in an exemplary embodiment of this application for polarized light of different wavelengths polarized along the first electric field direction and the second electric field direction.

[0028] Figure 4 This is a schematic diagram of light transmission in a display panel provided in an exemplary embodiment of this application;

[0029] Figure 5 This is a cross-sectional view of another display panel provided in an exemplary embodiment of this application;

[0030] Figure 6 This is a cross-sectional view of another display panel provided in an exemplary embodiment of this application;

[0031] Figure 7 This is a cross-sectional structural diagram of another display panel provided in an exemplary embodiment of this application;

[0032] Figure 8This is a cross-sectional structural diagram of another display panel provided in an exemplary embodiment of this application. Detailed Implementation

[0033] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0034] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0035] With the rapid development of VR devices, optical structures based on reflective polarization folded light paths (i.e., pancake optical structures) are gradually becoming the mainstream optical solution for VR display devices. Pancake optical paths require the emitted light from the display device to be right-handed circularly polarized, thus placing demands on the display panel for high resolution and brightness. Due to the optical characteristics of the pancake optical structure, when the light emitted from the display panel is right-handed circularly polarized, the theoretical optical efficiency of the pancake optical structure is approximately 25%. When the emitted light is unpolarized light, it needs to be converted to polarized light first by a polarizer, and then converted to right-handed circularly polarized light by a quarter-phase retardation plate. Thus, the theoretical optical efficiency after passing through the pancake optical structure is approximately 12.5%, resulting in lower display brightness.

[0036] Based on this, this application provides a display panel. The display panel includes a substrate, a reflective layer, a light-emitting layer, a phase retardation film, and a brightness enhancement polarizer. The reflective layer is disposed on the substrate; the light-emitting layer includes a plurality of light-emitting units and is disposed on the side of the reflective layer away from the substrate; the phase retardation film is located on the side of the light-emitting layer away from the substrate, and is used to delay the phase of the light emitted by the light-emitting units; the brightness enhancement polarizer is located on the side of the phase retardation film away from the light-emitting layer; it is used to polarize and reflect the light after the phase retardation film, allowing first polarized light with the same polarization direction as the brightness enhancement polarizer to be emitted, and reflecting second polarized light perpendicular to the polarization direction of the brightness enhancement polarizer toward the phase retardation film. At least a portion of the second polarized light, with the cooperation of the phase retardation film and the reflective layer, forms third linearly polarized light that is directed toward the brightness enhancement polarizer, and the polarization direction of the third polarized light is the same as the polarization direction of the brightness enhancement polarizer.

[0037] The aforementioned display panel, by providing a phase retardation film and a brightness enhancement polarizer on the side of the light-emitting layer facing away from the substrate, allows the emitted light, after being phase-retarded by the phase retardation film, to be polarized and reflected by the brightness enhancement polarizer. This results in the emission of first polarized light with the same polarization direction as the brightness enhancement polarizer, and reflection of second polarized light perpendicular to the polarization direction of the brightness enhancement polarizer towards the phase retardation film. At least a portion of the second polarized light, in conjunction with the phase retardation film and the reflective layer, forms third linearly polarized light that strikes the brightness enhancement polarizer. The polarization direction of the third polarized light is the same as that of the brightness enhancement polarizer, allowing it to exit from the brightness enhancement polarizer. This improves the light extraction efficiency and brightness of the display panel, thereby enhancing its display effect. Therefore, the display panel provided in this application can achieve increased light extraction brightness without increasing power consumption by adjusting the structure of the display panel itself.

[0038] The following is in conjunction with the appendix Figures 1 to 8 The above display panel is described in detail.

[0039] First, please refer to Figure 1 And combine when necessary Figures 2 to 4 As shown, the display panel 1000 includes a substrate 700, a reflective layer, a light-emitting layer 500, a phase retardation film 400, and a brightness enhancement polarizer 300. The reflective layer is disposed on the substrate 700.

[0040] The light-emitting layer 500 includes a plurality of light-emitting units 501 arranged at intervals, disposed on the side of the reflective layer away from the substrate 700.

[0041] It is understandable that the light L11 emitted by the light-emitting unit 501 can be natural light.

[0042] The light emitted by each light-emitting unit 501 can be of the same color or different colors. For example, the light emitted by the light-emitting unit 501 can be at least one of red, blue, and green light. For instance, among the multiple light-emitting units 501 included in the light-emitting layer 500, some emit red light, some emit blue light, and others emit green light. As another example, all the multiple light-emitting units 501 included in the light-emitting layer 500 may emit red light. Or, all the multiple light-emitting units 501 included in the light-emitting layer 500 may emit blue light. Or, all the multiple light-emitting units 501 included in the light-emitting layer 500 may emit green light.

[0043] A phase retardation plate 400 is located on the side of the light-emitting layer 500 facing away from the substrate 700. The phase retardation plate 400 is used to delay the phase of the light emitted by the light-emitting unit 501. The light L11 emitted by the light-emitting unit 501 is phase-retarded by the phase retardation plate 400 to form the corresponding light L12.

[0044] It is understandable that the light L11 emitted by the light-emitting unit 501 can be natural light. The light L12, after being phase-delayed by the phase retardation plate 400, is the corresponding natural light.

[0045] The brightness enhancement polarizer 300 is located on the side of the phase retarder 400 away from the light-emitting layer 500; the brightness enhancement polarizer 300 is used to polarize and reflect the light after phase retardation by the phase retarder 400, allowing the first polarized light L13 with the same polarization direction as the brightness enhancement polarizer 300 to be emitted, and reflecting the second polarized light L21 with the polarization direction perpendicular to the polarization direction of the brightness enhancement polarizer 300 toward the phase retarder 400.

[0046] At least a portion of the second polarized light L21, in cooperation with the phase retarder 400 and the reflective layer, forms a third polarized light L32 that is directed toward the brightness enhancement polarizer 300. The polarization direction of the third polarized light L32 is the same as that of the brightness enhancement polarizer 300, so that at least a portion of the third polarized light L32 (i.e., polarized light L33) can be emitted from the brightness enhancement polarizer 300. That is, the phase retarder 400 is also used to phase-retard at least a portion of the second polarized light L21 to form light L22, and the reflective layer is also used to reflect the light L22, after being phase-retarded by the phase retarder 400, back to the phase retarder 400 to form light L31 reflected to the phase retarder 400. The phase retarder 400 is also used to phase-retard at least a portion of the light L31 to form the third polarized light L32.

[0047] It is understandable that the first polarized light L13, the second polarized light L21, the third polarized light L32, and the polarized light L33 are all linearly polarized. The light ray L22 and the optical ray L31 are both circularly polarized.

[0048] In some embodiments, the phase retarder 400 is a quarter-phase retarder, and the polarization direction of the brightness enhancement polarizer 300 forms a 45° angle with the optical axis direction of the phase retarder 400.

[0049] A quarter-wave delay plate can be a quarter-wave delay plate (i.e., a quarter-wave plate) for one of the colors of light emitted by the light-emitting unit 501, and the optical path difference introduced by it is one-quarter of the wavelength (λ / 4) of that color light.

[0050] For example, when one of the multiple light-emitting units 501 included in the light-emitting unit 501 emits red light, another emits blue light, and yet another emits green light, the phase delay plate 400 can be selected as a quarter-wave plate for green light.

[0051] For example, when the multiple light-emitting units 501 included in the light-emitting layer 500 all emit red light, the phase delay film 400 can be a quarter-wave plate of red light.

[0052] The phase delay film 400 can be selected and configured according to specific needs, and this application does not limit it.

[0053] The 300 polarizing film is a reflective polarizing film. Combined with... Figure 2 and Figure 3 As shown, in some embodiments, the brightness enhancement polarizer 300 may be an APF film. The brightness enhancement polarizer 300 may include multiple layers of brightness enhancement polarizer film fn (n is an integer greater than 2) stacked together. The multiple layers of brightness enhancement polarizer film fn are alternating layers of first brightness enhancement polarizer film fi (i is an odd number greater than or equal to 1, e.g., ...). Figure 2 The intermediate brightness enhancement polarizing film layers f1, f3, f5, f7...), and the second brightness enhancement polarizing film layer f(i+1) (i is an odd number greater than or equal to 1, for example...). Figure 2 The first brightness enhancement polarizing film layers (f2, f4, f6, ...) are identical. Each of the first brightness enhancement polarizing film layers (f1, f3, f5, f7, ...) is identical. Each of the second brightness enhancement polarizing film layers (f(i+1)) is identical (f2, f4, f6, ...). The refractive index difference (Δny) between the first brightness enhancement polarizing film layer (f1) and the second brightness enhancement polarizing film layer (f(i+1)) in the first electric field direction Ey is the same. The refractive index difference (Δnx) between the first brightness enhancement polarizing film layer (f1) and the second brightness enhancement polarizing film layer (f(i+1)) in the second electric field direction Ex is the same. The refractive index difference (Δnx) between the first brightness enhancement polarizing film layer (f1) and the second brightness enhancement polarizing film layer (f(i+1)) in the second electric field direction Ex is less than the refractive index difference (Δny) between the first brightness enhancement polarizing film layer (f1) and the second brightness enhancement polarizing film layer (f(i+1)) in the first electric field direction Ey.

[0054] The polarization direction of the brightness enhancement polarizer 300 is the same as the first electric field direction Ey, and the polarization direction of the brightness enhancement polarizer 300 is perpendicular to the second electric field direction Ex.

[0055] In some embodiments, the refractive index difference Δny between the first brightness-enhancing polarizing film layer fi and the second brightness-enhancing polarizing film layer f(i+1) in the first electric field direction Ey can be 0.15-0.35. For example, 0.15, 0.18, 0.20, 0.25, 0.28, 0.30, 0.33, 0.35, etc.

[0056] The refractive index difference Δnx between the first brightness-enhancing polarizing film fi and the second brightness-enhancing polarizing film f(i+1) in the second electric field direction Ex approaches 0.

[0057] Combination Figure 3 As shown, by setting a specific film thickness, the APF film forms a multilayer interference structure in the Ey direction, thereby enhancing the light reflection intensity in the Ey direction. However, in the Ex direction, the refractive index difference is essentially zero, and it does not affect the light transmittance in the Ex direction. The transmittance curve of the APF film material is shown below. Figure 3 As shown. Figure 3 It can be seen that, after the effect of each polarizing film layer fn of the polarizing film 300, the transmittance Tp of P-polarized light with wavelength range of 400nm-100nm polarized along the first electric field direction Ey is high, which can be as high as 75% or more, while the transmittance Ts of S-polarized light with wavelength range of 400nm-100nm polarized along the second electric field direction Ex is low, which can be less than 15%.

[0058] Since the wavelength range of red light is approximately 620-760 nm, blue light is approximately 400-480 nm, and green light is approximately 492-577 nm, the aforementioned brightness-enhancing polarizer 300 can be well used to cover the range of light emitted by the light-emitting unit. Furthermore, combined with... Figure 3 As shown, within the range covered by red, blue, and green light, the transmittance Tp of P-polarized light along the first electric field direction Ey is relatively high, reaching over 80%.

[0059] In some embodiments, the display panel 1000 further includes a module structure layer 100 located on the side of the brightness enhancement polarizer 300 opposite to the phase delay film 400, the module structure layer 100 including a linear polarization film layer, the polarization direction of the linear polarization film layer being consistent with the polarization direction of the first polarized light L13.

[0060] The polarizing film can be an absorptive or reflective polarizer.

[0061] In some embodiments, the module structure layer 100 further includes a cover plate (not shown).

[0062] The cover plate is located on the side of the brightness enhancement polarizer 300 that is opposite to the brightness enhancement polarizer 300.

[0063] In some embodiments, the display panel 1000 further includes a filler layer 200. The filler layer 200 may be made of organic optical adhesive, serving as a bonding material between the module and the display panel. Additionally, specific structures can be incorporated into the filler layer 200 to achieve special functions, such as adding a touch-sensitive metal to enable touch functionality on the screen, or using materials with different refractive indices to form lenses, such as… Figure 7 The lens structure 201 in the middle is designed to achieve higher brightness.

[0064] The filler layer 200 is located between the light-enhancing polarizer 300 and the module structure layer 100.

[0065] In some embodiments, the display panel 1000 further includes a panel circuit layer 600 located between the light-emitting layer 500 and the substrate 700, the panel circuit layer 600 including an anode circuit layer 610, the anode circuit layer 610 serving as the reflective layer.

[0066] The anode circuit layer 610 can be made of a reflective material, such as a highly reflective metal material (e.g., silver, aluminum) or a metal alloy material.

[0067] The above-mentioned display panel's working diagram for polarization conversion is shown below. Figure 4 As shown, the brightness enhancement polarizer 300 and the anode circuit layer 610 of the OLED panel form a reflective cavity. A quarter-phase retardation film 400 is embedded in the reflective cavity. The optical axis of the phase retardation film 400 is at 45° to the polarization direction of the light transmitted through the brightness enhancement polarizer 300. After the light L11 emitted by the light-emitting unit 501 passes through the brightness enhancement polarizer 300, it is emitted as parallel to the plane (that is, the polarization direction is the same as the polarization direction of the brightness enhancement polarizer 300). The polarization L21, which is perpendicular to the plane (that is, the polarization direction is perpendicular to the polarization direction of the brightness enhancement polarizer 300), is modulated again into parallel to the plane as polarization L32 after being reflected by the phase retardation film 400 and the anode circuit layer 610. After passing through the brightness enhancement polarizer 300, it is emitted, thereby improving the polarization conversion efficiency of the OLED panel.

[0068] It should be noted that the reflective layer can also be a separately provided reflective film layer, such as a metal reflective layer made of metal. This reflective film layer can be located on the side of the anode circuit layer 610 close to the light-emitting unit 501, or it can be located on the side of the anode circuit layer 610 away from the light-emitting unit 501.

[0069] like Figure 5As shown, this application also provides another display panel 2000. The display panel 2000 is basically the same as the display panel 1000 described above, as can be referred to in the relevant description above, except that the filling layer 200 is located between the light-emitting layer 500 and the phase delay sheet 400.

[0070] like Figure 6 As shown, this application also provides another display panel 3000. The display panel 3000 is basically the same as the display panel 1000 described above, as can be referred to in the relevant description above, except that the filling layer 200 is located between the brightness enhancement polarizer 300 and the phase retardation film 400.

[0071] To further improve light transmittance, a lens structure can be formed by adding a material with a different refractive index to the filler layer 200. Generally, this lens structure can be a lens that can focus light to improve light output. In this embodiment, the refractive index of the filler layer 200 is 1.51 to 1.53, while the material of the lens (microlens) structure can be an organic material with a refractive index of 1.64 or 1.73. In this case, the microlens structure has the function of converging light, thereby achieving a higher light output of the display panel at the positive viewing angle, i.e., higher brightness. That is, the refractive index of the lens structure is different from that of the filler layer, which is used to increase the brightness of the display panel and the light output direction of different areas. This allows the display panel to better match the main ray angle of the pancake optical path structure, improving the visual brightness of the VR device.

[0072] like Figure 7 As shown, this application also provides another display panel 4000. The display panel 4000 is basically the same as the display panel 2000 described above, and can be referred to the relevant description above. The difference is that the filling layer 200 is provided with a plurality of lens structures 201 arranged at intervals, and the plurality of lens structures correspond one-to-one with the plurality of light-emitting units 501.

[0073] like Figure 8 As shown, this application also provides another display panel 5000. The display panel 4000 is basically the same as the display panel 3000 described above, and can be referred to the relevant description above. The difference is that the filling layer 200 is provided with a plurality of lens structures 201 arranged at intervals, and the plurality of lens structures correspond one-to-one with the plurality of light-emitting units 501.

[0074] It is understood that, in some other embodiments, multiple spaced lens structures may also be adaptively provided in the filling layer 200 of the above-described display panel 1000.

[0075] It is understandable that, among the aforementioned display panels with lens structures, such as Figure 7In the display panel 4000 shown, since the lens structure 201 is closer to the light-emitting unit 501, the transmittance of the display panel 4000 is relatively higher, which is more conducive to improving the light transmittance and increasing the light transmittance brightness of the display panel.

[0076] This application also discloses a display device, which includes the aforementioned display panel 1000.

[0077] The display device can be a VR display device. In a VR display device, the increased polarized light extraction rate of the aforementioned display panel 1000 can effectively improve the display brightness of the VR device.

[0078] In one embodiment, the display device further includes a housing, and the display panel 1000 is disposed on the housing.

[0079] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: substrate; A reflective layer is disposed on the substrate; The light-emitting layer includes a plurality of light-emitting units arranged at intervals, disposed on the side of the reflective layer away from the substrate; A phase retarder is located on the side of the light-emitting layer opposite to the substrate. The phase retarder is used to delay the phase of the light emitted by the light-emitting unit. An enhancement polarizer is located on the side of the phase retarder away from the light-emitting layer; the enhancement polarizer is used to polarize and reflect the light after phase retardation by the phase retarder, allowing first polarized light with the same polarization direction as the enhancement polarizer to be emitted, and reflecting second polarized light with the polarization direction perpendicular to the enhancement polarizer toward the phase retarder. Wherein, at least a portion of the second polarized light, in cooperation with the phase retarder and the reflective layer, forms a third linearly polarized light directed toward the brightness enhancement polarizer, and the polarization direction of the third polarized light is the same as that of the brightness enhancement polarizer.

2. The display panel as described in claim 1, characterized in that, The phase retarder is a quarter-phase retarder, and the polarization direction of the brightness enhancement polarizer forms a 45° angle with the optical axis of the phase retarder.

3. The display panel as described in claim 1, characterized in that, The display panel further includes a module structure layer located on the side of the brightness enhancement polarizer away from the phase retardation film. The module structure layer includes a linear polarization film layer, and the polarization direction of the linear polarization film layer is consistent with the polarization direction of the first polarized light.

4. The display panel as described in claim 3, characterized in that, The display panel further includes a filling layer; the filling layer is located between the light-emitting layer and the phase retardation film, or the filling layer is located between the phase retardation film and the brightness enhancement polarizer, or the filling layer is located between the brightness enhancement polarizer and the module structure layer.

5. The display panel as described in claim 4, characterized in that, The filling layer has multiple lens structures arranged at intervals, and each of the multiple lens structures corresponds to one of the multiple light-emitting units. The refractive index of the lens structure is different from that of the filling layer.

6. The display panel as described in claim 3, characterized in that, The module structure layer also includes a cover plate; the cover plate is located on the side of the brightness enhancement polarizer that is opposite to the brightness enhancement polarizer.

7. The display panel as described in claim 1, characterized in that, The brightness enhancement polarizer includes multiple alternating layers of first and second brightness enhancement polarizing film layers, wherein the refractive index difference between the first and second brightness enhancement polarizing film layers in the second electric field direction is less than the refractive index difference between the first and second brightness enhancement polarizing film layers in the first electric field direction. The polarization direction of the light-enhancing polarizer is the same as the direction of the first electric field, and the polarization direction of the light-enhancing polarizer is perpendicular to the direction of the second electric field.

8. The display panel as described in claim 7, characterized in that, The refractive index difference between the first and second brightness-enhancing polarizing films in the direction of the first electric field is 0.15-0.

35.

9. The display panel as claimed in claim 1, characterized in that, The display panel further includes a panel circuit layer located between the light-emitting layer and the substrate, the panel circuit layer including an anode circuit layer, the anode circuit layer serving as the reflective layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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