Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel and the display device are used for improving display efficiency. The display panel provided by the embodiment of the invention comprises a display substrate which comprises a substrate and at least one reflecting layer; the light modulation structure comprises a phase difference film and an orientation structure; the orientation structure comprises a plurality of layers of orientation films; the refractive indexes of the multiple layers of alignment films in the first polarization direction are the same, and the refractive indexes of any two adjacent layers of alignment films in the second polarization direction are different; the orientation structure is used for transmitting the linearly polarized light in the first polarization direction and reflecting the linearly polarized light in the second polarization direction; the phase difference film is used for mutually converting one of the linearly polarized light in the first polarization direction and the linearly polarized light in the second polarization direction with the left-hand circularly polarized light, and mutually converting the other of the linearly polarized light in the first polarization direction and the linearly polarized light in the second polarization direction with the right-hand circularly polarized light; and the light modulation structure is used for converting the circularly polarized light reflected by the reflecting layer into linearly polarized light in the second polarization direction and emitting the linearly polarized light.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] A mirror display is a screen that can act as a mirror when off and display normally when on. Mirror displays can be used in scenarios such as makeup mirrors, advertising screens, and car rearview mirrors. For organic light-emitting diode flexible displays, when the cover is made of glass, the display can be made into a hard screen with a fixed shape such as a curved surface or a flat surface; when the cover is a flexible film, the display can be made into a flexible screen with curved, folded, curled, or irregular shapes. The application of mirror displays on organic light-emitting diode flexible screens has broad prospects.

[0003] However, in the prior art, a polarizer is usually required to realize a mirror display on an organic light-emitting diode flexible screen, which causes more than 50% of the light to be absorbed, thus affecting the display efficiency. Summary of the invention

[0004] Embodiments of the present disclosure provide a display panel and a display device to improve display efficiency.

[0005] An embodiment of the present disclosure provides a display panel, the display panel comprising:

[0006] A display substrate, comprising a base substrate, and at least one reflective layer located on one side of the base substrate;

[0007] A light modulation structure is located on one side of a display substrate; the light modulation structure comprises: a phase difference film located on the side of a reflective layer away from a base substrate, and an orientation structure located on the side of the phase difference film away from the display substrate; the orientation structure comprises a multilayer orientation film; the multilayer orientation film has the same refractive index in a first polarization direction, and any two adjacent layers of orientation films have different refractive indexes in a second polarization direction; the orientation structure is used to transmit linearly polarized light in a first polarization direction and reflect linearly polarized light in a second polarization direction; the phase difference film is used to convert one of the linearly polarized light in the first polarization direction and the linearly polarized light in the second polarization direction into left-handed circularly polarized light, and to convert the other of the linearly polarized light in the first polarization direction and the linearly polarized light in the second polarization direction into right-handed circularly polarized light; the light modulation structure is used to: convert the circularly polarized light reflected by the reflective layer into linearly polarized light in the second polarization direction for emission.

[0008] In some embodiments, the multi-layer alignment film includes: a multi-layer first alignment film and a multi-layer second alignment film, wherein the first alignment film and the second alignment film are alternately arranged in a direction perpendicular to the substrate;

[0009] The refractive index of the first alignment film in the second polarization direction is smaller than the refractive index of the second alignment film in the second polarization direction.

[0010] In some embodiments, in the multi-layer alignment film, the alignment film closest to the phase difference film is the first alignment film, and the alignment film farthest from the phase difference film is the second alignment film.

[0011] In some embodiments, the second alignment film is a birefringent film, and a refractive index of the second alignment film in the first polarization direction is smaller than a refractive index of the second alignment film in the second polarization direction.

[0012] In some embodiments, a refractive index of the first alignment film in the first polarization direction is equal to a refractive index of the first alignment film in the second polarization direction.

[0013] In some embodiments, the reflective layer includes a first reflective layer;

[0014] The display substrate also includes:

[0015] A plurality of light emitting devices are located between the substrate and the light modulation structure; the light emitting devices include: a stacked anode, a light emitting functional layer, and a cathode; the anode is reused as the first reflective layer.

[0016] In some embodiments, the reflective layer further comprises: at least one second reflective layer;

[0017] The display substrate further includes: a pixel definition layer, and an encapsulation layer located on a side of the plurality of light emitting devices away from the base substrate;

[0018] The pixel definition layer includes a plurality of first opening regions, and the anode, the light-emitting functional layer, and the cathode are stacked in the first opening regions;

[0019] The second reflective layer is located on the side of the packaging layer away from the base substrate. The second reflective layer includes a plurality of second opening areas. The orthographic projection of the first opening area on the base substrate falls within the orthographic projection of the second opening area on the base substrate.

[0020] In some embodiments, the second reflective layer is disposed in contact with the encapsulation layer.

[0021] In some embodiments, the display substrate further includes: a color filter layer and / or a touch layer located on a side of the encapsulation layer facing away from the base substrate;

[0022] The second reflective layer is located on a side of the color filter layer away from the base substrate and / or the second reflective layer is located on a side of the touch control layer away from the base substrate.

[0023] In some embodiments, the material of the second reflective layer is aluminum or silver.

[0024] In some embodiments, the thickness of the second reflective layer is greater than or equal to 900 angstroms and less than or equal to 1100 angstroms.

[0025] In some embodiments, the thickness of the alignment film is greater than or equal to 40 micrometers and less than or equal to 70 micrometers.

[0026] In some embodiments, the phase difference film is a quarter wave plate.

[0027] In some embodiments, the thickness of the phase difference film is greater than or equal to 3 micrometers and less than or equal to 20 micrometers.

[0028] A display device provided by an embodiment of the present disclosure includes the display panel provided by an embodiment of the present disclosure.

[0029] The display panel and display device provided by the embodiments of the present disclosure have a light modulation structure arranged on one side of the display substrate, and the orientation structure in the light modulation structure includes a multi-layer orientation film, which transmits linear polarized light in the first polarization direction and reflects linear polarized light in the second polarization direction. When ambient light is incident on the light modulation structure, the linear polarized light in the second polarization direction is reflected, and the linear polarized light in the first polarization direction is transmitted, and after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the second polarization direction, which is reflected by the multi-layer orientation film, and then after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the first polarization direction, which can be emitted from the multi-layer orientation film, that is, the light modulation structure and the reflection layer can realize the reflection of ambient light, so that the display panel can realize the mirror display effect in the dark state. Therefore, the display panel provided by the embodiments of the present disclosure does not need to be provided with a reflection film and a circular polarizer, and can improve the light transmittance of the display panel while realizing the mirror display, thereby improving the display efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present disclosure;

[0032] Figure 2 A schematic structural diagram of a center alignment structure of a display panel provided in an embodiment of the present disclosure;

[0033] Figure 3 A dark state light path diagram of a display panel provided in an embodiment of the present disclosure;

[0034] Figure 4 A bright-state optical path diagram of a display panel provided in an embodiment of the present disclosure;

[0035] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0036] Figure 6 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0037] Figure 7 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0038] Figure 8 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0039] Fig. 9 A schematic structural diagram of a second reflective layer provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0042] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale, and are only intended to illustrate the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0043] In the related art, if an organic light-emitting diode (OLED) display panel wants to achieve a mirror display, one method requires coating the panel with a mirror metal or inorganic film and then matching it with a polarizer. However, the transmittance and reflectivity of the film formed by this method are negatively correlated, and transmittance is inevitably lost while achieving a good mirror. In addition, the setting of the polarizer will also cause more than 50% of the light to be absorbed, resulting in low light efficiency. It is necessary to increase the brightness of the light-emitting device to ensure the display effect, which will increase power consumption and shorten the life of the light-emitting device. The way in which the related art OLED panel achieves mirror display seriously reduces the display efficiency.

[0044] The present disclosure provides a display panel. Figure 1 As shown, the display panel includes:

[0045] The display substrate 1 comprises a base substrate 101 and at least one reflective layer 102 located on one side of the base substrate 101;

[0046] The light modulation structure 2 is located on one side of the display substrate 1; the light modulation structure 2 includes: a phase difference film 201 located on the side of the reflective layer 102 away from the base substrate 101, and an alignment structure 202 located on the side of the phase difference film 201 away from the display substrate 1; the alignment structure 202 includes a multi-layer alignment film 2021; the refractive index of the multi-layer alignment film 2021 in the first polarization direction is the same, and the refractive index of any two adjacent layers of the alignment film 2021 in the second polarization direction is different; Figure 2 As shown, the alignment structure 202 is used to transmit the linear polarized light p1 of the first polarization direction P1 and reflect the linear polarized light p2 of the second polarization direction P2; Figure 3 As shown, the phase difference film 201 is used for: converting one of the linear polarized light p1 in the first polarization direction P1 and the linear polarized light p2 in the second polarization direction P2 into left-handed circularly polarized light p3-, and converting the other of the linear polarized light p1 in the first polarization direction P1 and the linear polarized light p2 in the second polarization direction P2 into right-handed circularly polarized light p3+; the light modulation structure 2 is used for: converting the circularly polarized light p3 reflected by the reflective layer 102 into linear polarized light p2 in the second polarization direction P2 for emission.

[0047] It should be noted that when the phase difference film converts the linear polarized light p2 of the second polarization direction P2 into the left-handed circularly polarized light p3-, and converts the linear polarized light p1 of the first polarization direction P1 into the right-handed circularly polarized light p3+, the linear polarized light p1 of the first polarization direction P1 emitted toward the display substrate side of the orientation structure is converted into the right-handed circularly polarized light p3+ after passing through the phase difference film and emitted toward the reflective layer side, and the right-handed circularly polarized light p3+ is reflected by the reflective layer and becomes the left-handed circularly polarized light p3-, and the left-handed circularly polarized light p3+ is reflected by the reflective layer and becomes the left-handed circularly polarized light p3-. The circularly polarized light p3- is converted into linearly polarized light p2 in the second polarization direction P2 after passing through the phase difference film and emitted toward the side of the orientation structure. The linearly polarized light p2 in the second polarization direction P2 is reflected by the orientation structure and then passed through the phase difference film again and then converted into left-handed circularly polarized light p3- and emitted toward the side of the reflective layer. The left-handed circularly polarized light p3- is reflected by the reflective layer and then converted into right-handed circularly polarized light p3+. The right-handed circularly polarized light p3+ is converted into linearly polarized light p1 in the first polarization direction P1 and emitted toward the side of the orientation structure after passing through the phase difference film. When the phase difference film converts the linear polarized light p2 of the second polarization direction P2 into the right-handed circularly polarized light p3+, and converts the linear polarized light p1 of the first polarization direction P1 into the left-handed circularly polarized light p3-, the linear polarized light p1 of the first polarization direction P1 is converted into the left-handed circularly polarized light p3- after passing through the phase difference film, the left-handed circularly polarized light p3- is reflected by the reflective layer and becomes the right-handed circularly polarized light p3+, the right-handed circularly polarized light p3+ is converted into the linear polarized light p2 of the second polarization direction P2 after passing through the phase difference film, the linear polarized light p2 of the second polarization direction P2 is reflected by the orientation structure and then passes through the phase difference film again and is converted into the right-handed circularly polarized light p3+, the right-handed circularly polarized light p3+ is reflected by the reflective layer and becomes the left-handed circularly polarized light p3-, passes through the phase difference film again, and is converted into the linear polarized light p1 of the first polarization direction P1 and is emitted from the side of the orientation structure away from the display substrate.

[0048] The display panel provided by the embodiment of the present disclosure has a light modulation structure arranged on one side of the display substrate, and the orientation structure in the light modulation structure includes a multi-layer orientation film, which transmits linear polarized light in the first polarization direction and reflects linear polarized light in the second polarization direction. When ambient light is incident on the light modulation structure, the linear polarized light in the second polarization direction is reflected, and the linear polarized light in the first polarization direction is transmitted, and after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the second polarization direction, which is reflected by the multi-layer orientation film, and then after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the first polarization direction, which can be emitted from the multi-layer orientation film, that is, the light modulation structure and the reflection layer can realize the reflection of ambient light, so that the display panel can realize the mirror display effect in the dark state. Therefore, the display panel provided by the embodiment of the present disclosure does not need to be provided with a reflection film and a circular polarizer, and can improve the light transmittance of the display panel while realizing the mirror display, thereby improving the display efficiency.

[0049] It should be noted that Figure 3Schematic diagram of the light path of ambient light passing through the light modulation structure and the reflective layer when the display panel is in a dark state.

[0050] It should be noted that, among the first polarization direction P1 and the second polarization direction P2, one is the X direction of the XY polarization coordinate system, and the other is the Y direction of the XY polarization coordinate system. The phase difference film is used to: convert the linear polarized light in the X direction to the left circularly polarized light p3-, and convert the linear polarized light in the Y direction to the right circularly polarized light p3+; the Z direction is the propagation direction of light, and the XY plane perpendicular to the Z direction is used as the polarization plane; Figure 2 , Figure 3 Taking the first polarization direction P1 as the Y direction and the second polarization direction P2 as the X direction as an example, the phase difference film 201 is used to: convert the linear polarized light p2 of the second polarization direction P2 to the left-handed circularly polarized light p3-, and convert the linear polarized light p1 of the first polarization direction P1 to the right-handed circularly polarized light p3+. That is, the orientation structure reflects the polarized light in the X direction and transmits the polarized light in the Y direction. Specifically, Figure 3 As shown, the ambient light includes linear polarized light p2 in the X direction, i.e., the second polarization direction P2, and linear polarized light p1 in the Y direction, i.e., the first polarization direction P1. The linear polarized light p2 in the X direction, i.e., the second polarization direction P2, in the ambient light is reflected by the orientation structure 202. The linear polarized light p1 in the Y direction, i.e., the first polarization direction P1, in the ambient light is emitted from the orientation structure 202 and converted into right-handed circularly polarized light p3+ after passing through the phase difference film 201. The right-handed circularly polarized light p3+ is reflected by the reflective layer 102 and converted into left-handed circularly polarized light p3-. The circularly polarized light p3- is converted into linear polarized light p2 in the X direction, i.e., the second polarization direction P2, after passing through the phase difference film 201. The linear polarized light p2 in the X direction, i.e., the second polarization direction P2, is reflected by the orientation structure 202 and then passed through the phase difference film 201 again and then converted into left-handed circularly polarized light p3-. The left-handed circularly polarized light p3- is reflected by the reflective layer 102 and becomes right-handed circularly polarized light p3+, and then passes through the phase difference film 201 again and is converted into linear polarized light p1 in the Y direction, i.e., the first polarization direction P1, and is emitted from the side of the orientation structure 202 away from the display substrate.

[0051] Of course, in a specific implementation, when it is necessary to set the orientation structure to transmit polarized light in the X direction and reflect polarized light in the Y direction, the first polarization direction P1 is the Y direction and the second polarization direction P2 is the X direction, and the phase difference film is used to: convert the linear polarized light p2 of the second polarization direction P2 into left-handed circularly polarized light p3-, and convert the linear polarized light p1 of the first polarization direction P1 into right-handed circularly polarized light p3+.

[0052] In some embodiments, Figure 2As shown, the multi-layer alignment film 2021 includes: a multi-layer first alignment film 20211 and a multi-layer second alignment film 20212, in a direction perpendicular to the substrate (not shown) (i.e. Figure 2 The first alignment film 20211 and the second alignment film 20212 are alternately arranged in the Z direction; that is, the first alignment film 20211 and the second alignment film 20212 are alternately stacked on the side of the phase difference film (not shown) away from the display substrate (not shown) to form an alignment structure 202;

[0053] The refractive index of the first alignment film 20211 in the second polarization direction P2 is smaller than the refractive index of the second alignment film 20212 in the second polarization direction P2.

[0054] In the display panel provided by the embodiment of the present disclosure, the refractive index of the first orientation film in the second polarization direction is smaller than the refractive index of the second orientation film in the second polarization direction, so that when the linear polarized light in the second polarization direction propagates from the second orientation film toward the first orientation film and when the incident angle is greater than the total reflection angle, the linear polarized light in the second polarization direction can be totally reflected at the interface between the first orientation film and the second orientation film, which is more conducive to improving the reflectivity of the linear polarized light in the second polarization direction and improving the mirror reflection effect.

[0055] In some embodiments, Figure 2 As shown, in the multilayer alignment film 2021, the alignment film 2021 closest to the phase difference film (not shown) is the first alignment film 20211, and the alignment film 2021 farthest from the phase difference film is the second alignment film 20212. This is more conducive to improving the reflectivity of the linear polarized light in the second polarization direction in the ambient light in the dark state and improving the mirror reflection effect.

[0056] In some embodiments, the second alignment film is a birefringent film, and a refractive index of the second alignment film in the first polarization direction is smaller than a refractive index of the second alignment film in the second polarization direction.

[0057] In some embodiments, a refractive index of the first alignment film in the first polarization direction is equal to a refractive index of the first alignment film in the second polarization direction.

[0058] That is, the first alignment film may not be a birefringent film. In the display panel provided by the embodiment of the present disclosure, the second alignment film is a birefringent film, and the first alignment film is not a birefringent film, which is conducive to simplifying the design difficulty of the second alignment film and the first alignment film while ensuring that the refractive index of the first alignment film in the second polarization direction is less than the refractive index of the second alignment film in the second polarization direction.

[0059] In some embodiments, the refractive index of the second orientation film in the first polarization direction is 1.57, and the refractive index of the first orientation film in the second polarization direction is 1.84.

[0060] Of course, in some embodiments, the first alignment film may also be a birefringent film, and the refractive index of the first alignment film in the first polarization direction is smaller than the refractive index of the first alignment film in the second polarization direction.

[0061] In some embodiments, the alignment film is an organic film, such as a polyester film.

[0062] It should be noted that the reflectivity of the orientation structure to ambient light and the mirror display effect of the display panel in the dark state are positively correlated with the number of orientation films in the orientation structure. That is, the more the number of orientation films, the higher the reflectivity of the orientation structure and the better the mirror display effect of the display panel in the dark state. In some embodiments, the orientation structure includes hundreds of layers of orientation films. In order to further improve the mirror display effect of the display panel in the dark state, the orientation structure includes thousands of layers of orientation films.

[0063] In some embodiments, the thickness of the alignment film is greater than or equal to 40 micrometers and less than or equal to 70 micrometers. For example, the thickness of the alignment film is 60 micrometers.

[0064] In some embodiments, the phase difference film is a quarter wave plate.

[0065] In some embodiments, the thickness of the phase difference film is greater than or equal to 30 micrometers and less than or equal to 20 micrometers.

[0066] For example, the thickness of the phase difference film is 7 micrometers.

[0067] In some embodiments, Figure 1 As shown, the display panel further includes: a first adhesive layer 3 located between the multi-layered alignment film 202 and the phase difference film 201, and a second adhesive layer 4 located between the phase difference film 201 and the display substrate 1. That is, the alignment structure and the phase difference film can be made independently and then bonded to form a light modulation structure through the first adhesive layer, and the light modulation structure is then bonded to the display substrate through the second adhesive layer.

[0068] In some embodiments, the first adhesive layer and the second adhesive layer are pressure-sensitive adhesives.

[0069] In some embodiments, the thickness of the first adhesive layer and the second adhesive layer is 15 micrometers.

[0070] In some embodiments, Figure 1 As shown, the display substrate 1 also includes:

[0071] A plurality of light emitting devices 103 are located between the substrate 101 and the light modulation structure 2 ; the light emitting devices 103 include: an anode 1031 , a light emitting functional layer 1032 , and a cathode 1033 which are stacked.

[0072] In some embodiments, the anode is a reflective anode. Figure 1 As shown, the reflective layer 102 includes a first reflective layer 1021 , and the anode 1031 is reused as the first reflective layer 1021 .

[0073] It should be noted that the dark state of the display panel is the state where the light emitting device does not emit light, and the bright state of the display panel is the state where the light emitting device emits light. In the bright state of the display panel, the light emitted by the light emitting device passes through the light modulation structure as shown in the optical path diagram Figure 4 As shown, the light emitted by the light emitting device 103 includes linear polarized light p2 in the X direction, i.e., the second polarization direction P2, and linear polarized light p1 in the Y direction, i.e., the first polarization direction P1. Moreover, after passing through the phase difference film 201, the light emitted by the light emitting device 103 still includes linear polarized light p2 in the X direction, i.e., the second polarization direction P2, and linear polarized light p1 in the Y direction, i.e., the first polarization direction P1. Among the light emitted by the light emitting device 103 and emitted from the phase difference film 201 toward the side of the orientation structure 202, the linear polarized light p1 in the Y direction, i.e., the first polarization direction P1, is emitted from the orientation structure 202, and the linear polarized light p2 in the X direction, i.e., the second polarization direction P2, is reflected by the orientation structure 202 and reaches the phase difference film 201 again. The linear polarized light p2 in the X direction, i.e., the second polarization direction P2, is converted into left-handed circularly polarized light p3- after passing through the phase difference film 201, and the left-handed circularly polarized light p3- is converted into right-handed circularly polarized light p3+ after being reflected by the reflective layer 102 and passes through the phase difference film 201 again, and is converted into linear polarized light p1 in the Y direction, i.e., the first polarization direction P1, and is emitted from the side of the orientation structure 202 away from the display substrate. Therefore, the linear polarized light p2 in the X direction, i.e., the second polarization direction P2, and the linear polarized light p1 in the Y direction, i.e., the first polarization direction P1, included in the light emitting device 103, can both be emitted through the light modulation structure 2.

[0074] Compared with the display panel provided with circular polarizer in the related art, the display panel provided by the embodiment of the present disclosure uses the light modulation structure and the reflective layer to realize the mirror display in the dark state, and at the same time, it can improve the transmittance of the light emitted by the light-emitting device in the bright state, thereby improving the display efficiency in the bright state, and increasing the light output brightness of the light-emitting device without increasing power consumption, which can improve the life of the light-emitting device. Compared with the structure provided with circular polarizer and reflective film, the display panel provided by the embodiment of the present disclosure uses the light modulation structure, which can improve the light efficiency by at least 35%.

[0075] In some embodiments, the light-emitting layer functional layer includes an organic light-emitting layer, and may further include an electron injection layer, an electron transport layer, a hole transport layer, a hole injection layer, and the like.

[0076] In some embodiments, the display panel includes a plurality of sub-pixels; the light emitting devices correspond one-to-one to the sub-pixels.

[0077] In some embodiments, the plurality of sub-pixels include: a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels;

[0078] The multiple light-emitting devices include: multiple first light-emitting devices, multiple second light-emitting devices and multiple third light-emitting devices; the light-emitting layer functional layer of the first light-emitting device includes a first organic light-emitting layer, the light-emitting layer functional layer of the second light-emitting device includes a second organic light-emitting layer, and the light-emitting layer functional layer of the third light-emitting device includes a third organic light-emitting layer.

[0079] In some embodiments, the first sub-pixel is a blue sub-pixel, the first light-emitting device is a blue light-emitting device, and the first organic light-emitting layer is a blue light-emitting layer; the second sub-pixel is a green sub-pixel, the second light-emitting device is a green light-emitting device, and the second organic light-emitting layer is a green light-emitting layer; the third sub-pixel is a red sub-pixel, the third light-emitting device is a red light-emitting device, and the third organic light-emitting layer is a red light-emitting layer.

[0080] In some embodiments, Figure 1 As shown, the display substrate 1 further includes: a first buffer layer 108 located between the anode 1031 and the base substrate 101 , a driving circuit layer 112 located between the first buffer layer 108 and the anode 1031 , and a first planarization layer 111 located between the driving circuit layer 112 and the anode 1031 .

[0081] In some embodiments, the driving circuit layer includes a plurality of pixel driving circuits arranged in an array; the pixel driving circuit is used to drive the light-emitting device to emit light; the pixel driving circuit includes a thin film transistor and a storage capacitor; Figure 1 As shown, the thin film transistor TFT includes: an active layer 1121, a gate G, a source S and a drain D;

[0082] The display substrate 1 further includes: a first gate insulating layer 109 between the active layer 1121 and the gate G, an interlayer insulating layer 110 between the first gate insulating layer 109 and the source S and the drain D, and a first planarization layer 111 between the light emitting device 103 and the source S and the drain D. The anode 1031 is connected to the drain D through a via hole penetrating the first planarization layer 111.

[0083] In some embodiments, Figure 1 As shown, the display substrate 1 further includes: a pixel definition layer 104, and an encapsulation layer 107 located on a side of the plurality of light-emitting devices 103 away from the base substrate 101;

[0084] The pixel definition layer 104 includes a plurality of first opening regions 1041 , and the anode 1031 , the light emitting functional layer 1032 , and the cathode 1033 are stacked in the first opening regions 1041 .

[0085] In some embodiments, Figure 1As shown, the pixel definition layer 104 covers the edge of the anode 1031 , that is, the pixel definition layer 104 is located on the side of the anode 1031 away from the substrate 101 , and the light-emitting functional layer 1032 is located on the side of the pixel definition layer 104 away from the substrate 101 .

[0086] It should be noted that the active layer can be made of amorphous silicon, polycrystalline silicon, oxide semiconductor materials, etc. The active layer includes: a source region, a drain region, and a channel region located between the source region and the drain region. The source region and the drain region can be conductive regions formed by doping with n-type impurities or p-type impurities. The source overlaps the source region, and the drain overlaps the drain region.

[0087] In some embodiments, the display substrate further includes a plurality of scan lines and a plurality of data lines, the scan lines are electrically connected to the gates, and the data lines are electrically connected to the sources.

[0088] It should be noted that Figure 1 In the figure, the thin film transistor TFT is taken as an example of a top gate structure, that is, the gate G is located on the side of the active layer 1121 away from the substrate 101. Of course, the thin film transistor TFT can also be a bottom gate or other structure. If the thin film transistor is a bottom gate structure, the active layer is located on the side of the gate away from the substrate. Similarly, a first gate insulating layer is also included between the gate and the active layer, and the source and drain are in direct contact with the active layer on the side of the active layer away from the substrate.

[0089] In some embodiments, the storage capacitor includes a first capacitor electrode and a second capacitor electrode that are arranged opposite to each other. For example, the first capacitor electrode is arranged in the same layer as the gate electrode, and the second capacitor electrode is arranged in the same layer as the source electrode and the drain electrode. Alternatively, the second capacitor electrode may be arranged in the same layer as the source electrode and the drain electrode, and the first capacitor electrode is located between the interlayer insulating layer and the gate electrode; the display panel further includes a second gate insulating layer located between the first capacitor electrode and the gate electrode.

[0090] In some embodiments, Figure 1 As shown, the encapsulation layer 107 includes: a first inorganic encapsulation film 1071 , an organic encapsulation film 1072 , and a second inorganic encapsulation film 1073 which are stacked.

[0091] In some embodiments, Figures 5 to 9 As shown, the reflective layer 102 further includes: at least one second reflective layer 1022;

[0092] The second reflective layer 1022 is located on the side of the encapsulation layer 107 away from the base substrate 101 . The second reflective layer 1022 includes a plurality of second opening areas 10221 . The orthographic projection of the first opening area 1041 on the base substrate 101 falls within the orthographic projection of the second opening area 10221 on the base substrate 101 .

[0093] It should be noted that when the anode is reused as a reflective layer, due to its position and thickness, the reflective effect in the dark state is weak. The display panel provided by the embodiment of the present disclosure adds at least one second reflective layer on the side of the encapsulation layer away from the base substrate, which can improve the reflective effect, thereby improving the reflective effect of the display panel in the dark state, thereby improving the mirror display effect. In addition, the second reflective layer includes a plurality of second opening areas, and the orthographic projection of the first opening area on the base substrate falls within the orthographic projection of the second opening area on the base substrate, that is, the second reflective layer will not block the light-emitting area of ​​the light-emitting device.

[0094] It should be noted that Fig. 9 It is a pattern of the orthographic projection of the second reflective layer 1022 including a plurality of second opening areas 10221 on the base substrate.

[0095] In some embodiments, Fig. 9 As shown, the areas of the plurality of second opening regions 10221 are not completely the same.

[0096] It should be noted that the luminous efficiency of luminous layers of different colors is different, so the areas of the first opening regions corresponding to sub-pixels of different colors are different, thereby improving the uniformity of the luminous efficiency of sub-pixels of different colors. Correspondingly, the areas of the second opening regions corresponding to sub-pixels of different colors are different.

[0097] In some embodiments, Figure 5 As shown, the second reflective layer 1022 is disposed in contact with the encapsulation layer 107. That is, the second reflective layer 1022 is disposed in contact with the second inorganic encapsulation film 1073.

[0098] In some embodiments, Figures 5 to 8 As shown, the display substrate 1 further includes: a first protective layer 113 ; the first protective layer 113 is located on a side of the second inorganic encapsulation film 1073 away from the base substrate 101 .

[0099] In some embodiments, Figures 5 to 8 As shown, the film layer closest to the light modulation structure 2 in the display substrate 1 is the second reflective layer 1022. That is, the second reflective layer is arranged on the uppermost layer of the display substrate, which can further improve the reflection effect of ambient light and further improve the dark state mirror display effect.

[0100] In some embodiments, Figure 5 As shown, the second reflective layer 1022 is located on a side of the first protection layer 113 away from the second inorganic encapsulation film 1073 .

[0101] Alternatively, in some embodiments, the second reflective layer may also be disposed between the first protective layer and the second inorganic encapsulation film.

[0102] In some embodiments, Figure 6 to Figure 8As shown, the display substrate 1 further includes: a color filter layer 105 and / or a touch layer 106 located on the side of the encapsulation layer 107 away from the base substrate 101; wherein, Figure 6 The display substrate 1 includes a color filter layer 105 but does not include a touch layer 106; Figure 7 The display substrate 1 includes a touch layer 106 but does not include a color filter layer 105; Figure 8 The middle display substrate 1 includes a color filter layer 105 and a touch layer 106 , and the touch layer 106 is located on a side of the color filter layer 105 away from the bottom substrate 101 ;

[0103] The second reflective layer 1022 is located on a side of the color filter layer 105 facing away from the base substrate 101 and / or the second reflective layer 1022 is located on a side of the touch layer 106 facing away from the base substrate 101 .

[0104] In some embodiments, Figure 6 , Figure 8 As shown, the color filter layer 105 includes a plurality of color filters 1051;

[0105] The display substrate 1 further includes: a light shielding layer 114 having a plurality of third opening areas 1141 , wherein the orthographic projection of the first opening area 1041 on the base substrate 101 falls within the orthographic projection of the third opening area 1141 on the base substrate 101 ; and the color filter 1051 is at least located within the third opening area 1141 .

[0106] In some embodiments, when the display panel includes: a first sub-pixel, a second sub-pixel and a third sub-pixel, the multiple color filters include: a first color filter corresponding to the first sub-pixel, a second color filter corresponding to the second sub-pixel and a third color filter corresponding to the third sub-pixel.

[0107] In some embodiments, Figure 6 , Figure 8 As shown, the orthographic projection of the third opening area 1141 on the base substrate 101 falls within the orthographic projection of the second opening area 10221 on the base substrate 101 ; the color filter 1051 is at least located in the third opening area 1141 .

[0108] In some embodiments, Figure 6 , Figure 8 As shown, the display substrate 1 further includes: a second planarization layer 116 located on the side of the light shielding layer 114 and the color filter layer 105 away from the base substrate 101 .

[0109] In some embodiments, Figure 6 As shown, the second planarization layer 116 is reused as the first protection layer 113, and the second reflective layer 1022 is located on the side of the first protection layer 113 away from the color filter 1051. That is, the second reflective layer is arranged on the top layer of the display substrate, which can further improve the reflection effect of ambient light and further improve the dark state mirror display effect.

[0110] Alternatively, in some embodiments, the second reflective layer is located on a side of the second planarization layer facing away from the substrate, the second reflective layer is disposed in contact with the second planarization layer, and the first protective layer covers the second reflective layer disposed on the second planarization layer.

[0111] In some embodiments, Figure 7 , Figure 8 As shown, the touch layer 106 includes: a second buffer layer 1064, a first touch conductive layer 1061 located on the side of the second buffer layer 1064 away from the base substrate 101, a second touch conductive layer 1062 located on the side of the first touch conductive layer 1061 away from the base substrate 101, and a touch insulating layer 1063 located between the first touch conductive layer 1061 and the second touch conductive layer 1062.

[0112] In some embodiments, the touch layer includes a plurality of touch electrodes; the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes intersecting the plurality of first touch electrodes. For example, the first touch electrode and the second touch electrode are located in different touch conductive layers, that is, the first touch electrode and the second touch electrode are located in the first touch conductive layer and the second touch conductive layer, respectively. Alternatively, one of the first touch electrode and the second touch electrode is located in the same touch conductive layer, and the other touch electrode is located in a different touch conductive layer. The touch electrodes located in different touch conductive layers are electrically connected through vias penetrating the touch insulating layer, and the first touch electrode and the second touch electrode include portions located in the same touch conductive layer.

[0113] In some embodiments, the orthographic projections of the first touch conductive layer and the second touch conductive layer on the base substrate fall within the orthographic projection of the pixel definition layer on the base substrate, that is, the orthographic projections of the first touch conductive layer and the second touch conductive layer on the base substrate do not overlap with the orthographic projection of the first opening area on the base substrate, thereby preventing the touch layer from affecting the light transmittance of the light-emitting device.

[0114] In some embodiments, Figure 7 , Figure 8 As shown, the first protective layer 113 is located on the side of the second touch conductive layer 1062 away from the base substrate 101, and the second reflective layer 1022 is located on the side of the first protective layer 113 away from the base substrate 101. That is, the second reflective layer is arranged on the top layer of the display substrate, which can further improve the reflection effect of ambient light and further improve the dark state mirror display effect.

[0115] Alternatively, in some embodiments, the touch layer may also include a touch protection layer located on the side of the second touch conductive layer away from the base substrate, the second reflective layer is located on the side of the touch protection layer away from the second touch conductive layer, and the first protection layer is located on the side of the second reflective layer away from the second touch conductive layer.

[0116] It should be noted that Figures 5 to 8 The second reflective layer 1022 is located at the uppermost layer of the display substrate 1. In a specific implementation, the second reflective layer can be disposed at any position that does not affect other structures. Figures 5 to 8 Take the display substrate including a second reflective layer as an example for illustration. In a specific implementation, the display substrate may include multiple second reflective layers. For example, when the display substrate includes a color filter layer, a second reflective layer may be provided between the encapsulation layer and the color filter layer, and on the side of the color filter layer facing away from the base substrate. When the display substrate includes a touch layer, a second reflective layer may be provided between the encapsulation layer and the touch layer, and on the side of the touch layer facing away from the base substrate. When the display substrate includes a touch layer and a color filter layer, a second reflective layer may be provided between the encapsulation layer and the color filter layer, between the color filter layer and the touch layer, and on at least one of the side of the touch layer facing away from the base substrate.

[0117] In some embodiments, the material of the second reflective layer is aluminum or silver.

[0118] In some embodiments, the thickness of the second reflective layer is greater than or equal to 900 angstroms and less than or equal to 1100 angstroms.

[0119] It should be noted that the reflective effect of the second reflective layer is positively correlated with its thickness. In the display panel provided by the embodiment of the present disclosure, the thickness of the second reflective layer is greater than or equal to 900 angstroms and less than or equal to 1100 angstroms, which can ensure the reflective effect of the second reflective layer while avoiding excessive increase in the thickness of the display panel. For example, the thickness of the second reflective layer is 1000 angstroms.

[0120] Based on the same inventive concept, an embodiment of the present disclosure further provides a display device, including the display panel provided by the embodiment of the present disclosure.

[0121] The display device provided in the embodiment of the present disclosure is any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by a person skilled in the art, and will not be described in detail here, nor should they be used as a limitation of the present disclosure. The implementation of the display device can refer to the embodiment of the display panel above, and the repeated parts will not be described in detail.

[0122] In summary, the display panel and display device provided by the embodiments of the present disclosure have a light modulation structure arranged on one side of the display substrate, and the orientation structure in the light modulation structure includes a multilayer orientation film, which transmits linear polarized light in the first polarization direction and reflects linear polarized light in the second polarization direction. When ambient light is incident on the light modulation structure, the linear polarized light in the second polarization direction is reflected, and the linear polarized light in the first polarization direction is transmitted, and after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the second polarization direction, which is reflected by the multilayer orientation film, and then after passing through the phase difference film, the reflection layer, and the phase difference film, it becomes linear polarized light in the first polarization direction, which can be emitted from the multilayer orientation film, that is, the light modulation structure and the reflection layer can realize the reflection of ambient light, so that the display panel can realize the mirror display effect in the dark state. Therefore, the display panel provided by the embodiments of the present disclosure does not need to be provided with a reflection film and a circular polarizer, and can improve the light transmittance of the display panel while realizing the mirror display, thereby improving the display efficiency.

[0123] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0124] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A display panel, wherein: The display panel comprises: A display substrate, comprising a base substrate, and at least one reflective layer located on one side of the base substrate; A light modulation structure is located on one side of the display substrate; the light modulation structure includes: a phase difference film located on the side of the reflective layer away from the base substrate, and an orientation structure located on the side of the phase difference film away from the display substrate; the orientation structure includes a multilayer orientation film; the multilayer orientation film has the same refractive index in the first polarization direction, and any two adjacent layers of the orientation film have different refractive indexes in the second polarization direction; the orientation structure is used to transmit linear polarized light in the first polarization direction and reflect linear polarized light in the second polarization direction; the phase difference film is used to: convert one of the linear polarization light in the first polarization direction and the linear polarization light in the second polarization direction into left-handed circularly polarized light, and convert the other of the linear polarization light in the first polarization direction and the linear polarization light in the second polarization direction into right-handed circularly polarized light; the light modulation structure is used to: convert the circularly polarized light reflected by the reflective layer into linear polarized light in the second polarization direction for emission.

2. The display panel according to claim 1, wherein: The multi-layer alignment film comprises: a multi-layer first alignment film and a multi-layer second alignment film, wherein the first alignment film and the second alignment film are alternately arranged in a direction perpendicular to the substrate; A refractive index of the first alignment film in the second polarization direction is smaller than a refractive index of the second alignment film in the second polarization direction.

3. The display panel according to claim 2, wherein: In the multilayer alignment film, the alignment film closest to the phase difference film is the first alignment film, and the alignment film farthest from the phase difference film is the second alignment film.

4. The display panel according to claim 2 or 3, wherein: The second alignment film is a birefringent film, and a refractive index of the second alignment film in a first polarization direction is smaller than a refractive index of the second alignment film in a second polarization direction.

5. The display panel according to claim 4, wherein: A refractive index of the first alignment film in the first polarization direction is equal to a refractive index of the first alignment film in the second polarization direction.

6. The display panel according to any one of claims 1 to 3 and 5, wherein: The reflective layer includes a first reflective layer; The display substrate further comprises: A plurality of light emitting devices are located between the substrate and the light modulation structure; the light emitting devices include: a stacked anode, a light emitting functional layer, and a cathode; the anode is reused as the first reflective layer.

7. The display panel according to claim 6, wherein: The reflective layer further comprises: at least one second reflective layer; The display substrate further comprises: a pixel definition layer, and an encapsulation layer located on a side of the plurality of light emitting devices away from the base substrate; The pixel definition layer includes a plurality of first opening areas, and the anode, the light-emitting functional layer, and the cathode are stacked in the first opening areas; The second reflective layer is located on a side of the packaging layer away from the base substrate. The second reflective layer includes a plurality of second opening areas. The orthographic projection of the first opening area on the base substrate falls within the orthographic projection of the second opening area on the base substrate.

8. The display panel according to claim 7, wherein: The second reflective layer is disposed in contact with the encapsulation layer.

9. The display panel according to claim 7 or 8, wherein: The display substrate further comprises: a color filter layer and / or a touch control layer located on a side of the encapsulation layer away from the base substrate; The second reflective layer is located on a side of the color filter layer away from the base substrate and / or the second reflective layer is located on a side of the touch control layer away from the base substrate.

10. The display panel according to claim 6, wherein: The material of the second reflective layer is aluminum or silver.

11. The display panel according to claim 10, wherein: The thickness of the second reflective layer is greater than or equal to 900 angstroms and less than or equal to 1100 angstroms.

12. The display panel according to any one of claims 1 to 3, 5, 7, 8, 10, and 11, wherein: The thickness of the alignment film is greater than or equal to 40 micrometers and less than or equal to 70 micrometers.

13. The display panel according to any one of claims 1 to 3, 5, 7, 8, 10, and 11, wherein: The phase difference film is a quarter wave plate.

14. The display panel according to any one of claims 1 to 3, 5, 7, 8, 10, and 11, wherein: The thickness of the phase difference film is greater than or equal to 3 micrometers and less than or equal to 20 micrometers.

15. A display device, wherein: The invention comprises a display panel according to any one of claims 1 to 14.

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