Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes a light-transmitting area and non-light-transmitting areas located on both sides of the light-transmitting area. The display panel includes a light-emitting functional layer, a light-shielding layer, a reflective layer, and a color filter film. The light-emitting functional layer is located in the light-transmitting area, and the light-shielding layer is located above the light-emitting functional layer and in the non-light-transmitting area. The light-shielding layer includes a side surface near the light-transmitting area, the reflective layer covers the side surface of the light-shielding layer, and the color filter film is located in the light-transmitting area and between two adjacent light-shielding layers. Since the reflective layer is located between the light-shielding layer and the color filter film, the large-angle light emitted from the light-emitting functional layer can be reflected at the interface between the reflective layer and the color filter film, resulting in a smaller emission angle and achieving the privacy function of the display panel.

Description

Technical Field

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

[0002] Active-matrix organic light emitting diode (AMOLED) technology is now widely used in smartphones and tablets. When these devices are used in public places, personal privacy needs to be protected in some scenarios, so the demand for anti-spying features is increasing.

[0003] Therefore, how to implement anti-peeping functionality on displays is currently a hot research topic.

[0004] Application content

[0005] The purpose of this application is to provide a display panel and display device that achieves privacy protection through the reflective layer of the display panel.

[0006] On one hand, this application provides a display panel, the display panel including a light-transmitting area and non-light-transmitting areas located on both sides of the light-transmitting area, the display panel including at least:

[0007] A light-emitting functional layer is located in the light-transmitting area;

[0008] A light-shielding layer is located above the light-emitting functional layer and in the non-transparent area, the light-shielding layer including a side surface near the light-transmitting area;

[0009] A reflective layer covers the side surface of the light-shielding layer;

[0010] A colored filter film is located in the light-transmitting area and between two adjacent light-shielding layers;

[0011] The reflective layer is located between the light-shielding layer and the color filter film.

[0012] In some embodiments, the display panel further includes:

[0013] An encapsulation layer is located between the light-emitting functional layer and the light-shielding layer;

[0014] The touch layer is located between the light-shielding layer and the encapsulation layer;

[0015] The reflective layer is in contact with the touch layer and is located between two adjacent light-shielding layers.

[0016] In some embodiments, the light-shielding layer further includes an upper surface connected to the side and facing away from the light-emitting functional layer, and the reflective layer also covers the upper surface.

[0017] In some embodiments, the refractive index of the reflective layer is less than the refractive index of the color filter film.

[0018] In some embodiments, the refractive index of the reflective layer is 1.3 to 1.4, and the refractive index of the color filter film is 1.5 to 1.7.

[0019] In some embodiments, the reflective layer comprises lithium fluoride, manganese fluoride, and / or a combination thereof.

[0020] In some embodiments, the thickness of the reflective layer is less than the thickness of the light-shielding layer.

[0021] In some embodiments, the thickness of the reflective layer is 30 to 300 nanometers, and the thickness of the light-shielding layer is 1 to 2 micrometers.

[0022] In some embodiments, the display panel further includes:

[0023] A planarization layer covers the color filter film and the light-shielding layer;

[0024] A cover plate is located on the flat layer.

[0025] On the other hand, this application provides a display device that includes the display panel provided in any of the above embodiments.

[0026] This application provides a display panel and a display device. The display panel includes a light-transmitting area and non-light-transmitting areas located on both sides of the light-transmitting area. The display panel includes a light-emitting functional layer, a light-shielding layer, a reflective layer, and a color filter film. The light-emitting functional layer is located in the light-transmitting area, and the light-shielding layer is located above the light-emitting functional layer and in the non-light-transmitting area. The light-shielding layer includes a side surface near the light-transmitting area, the reflective layer covers the side surface of the light-shielding layer, and the color filter film is located in the light-transmitting area and between two adjacent light-shielding layers. Since the reflective layer is located between the light-shielding layer and the color filter film, the large-angle light emitted from the light-emitting functional layer can be reflected at the interface between the reflective layer and the color filter film, resulting in a smaller emission angle and achieving the privacy function of the display panel. Attached Figure Description

[0027] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0028] Figure 1 These are schematic diagrams of the display panel structure provided in some embodiments of this application;

[0029] Figure 2 These are schematic diagrams of the display panel structure provided in some embodiments of this application;

[0030] Figure 3This is a schematic diagram of the optical path of a display panel provided in some embodiments of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0035] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of a display panel provided in some embodiments of this application. This display panel can be applied to various displays, such as liquid crystal displays (LCDs), organic light-emitting diode displays (OLEDs), and micro-light-emitting diode displays (Micro-LEDs). This display panel can further be applied to various electronic devices, such as wearable devices like smart bracelets, smartwatches, VR (Virtual Reality) devices, mobile phones, e-books and e-newspapers, televisions, personal portable computers, and foldable and rollable flexible display and lighting devices.

[0036] The display panel 100 includes a light-transmitting area T1 and non-light-transmitting areas T2 located on both sides of the light-transmitting area T1. The display panel 100 includes a light-emitting functional layer 10, a light-shielding layer 11, a reflective layer 12, and a color filter film 13. The light-emitting functional layer 10 is located in the light-transmitting area T1, and the light-shielding layer 11 is located above the light-emitting functional layer 10 and in the non-light-transmitting area T2. The light-shielding layer 11 includes a side surface 111 near the light-transmitting area T1, and the reflective layer 12 covers the side surface 111 of the light-shielding layer 11. The color filter film 13 is located in the light-transmitting area T1 and between two adjacent light-shielding layers 11. The reflective layer 12 is located between the light-shielding layer 11 and the color filter film 13.

[0037] In some embodiments, the display panel 100 may include a plurality of light-transmitting areas T1 and a plurality of light-blocking areas T2, and the light-transmitting areas T1 and light-blocking areas T2 are alternately arranged, that is, there is a light-blocking area T2 between two adjacent light-transmitting areas T1, and there is a light-transmitting area T1 between two adjacent light-blocking areas T2.

[0038] In some embodiments, in order to ensure the filtering effect, the color filter film 13 also covers part of the upper surface of the light-shielding layer 11.

[0039] The display panel 100 may further include an array substrate 14 and a pixel definition layer 15 located on the array substrate 14. The pixel definition layer 15 is located in the non-transparent area T2 and is adjacent to the light-emitting functional layer 10 of the transparent area T1. That is, the transparent area T1 may be provided with corresponding upper and lower light-emitting functional layers 10 and color filter films 13, and the non-transparent area T2 may be provided with corresponding upper and lower light-shielding layers 11 and pixel definition layers 15.

[0040] This embodiment only illustrates the boundary between the light-transmitting area T1 and the non-light-transmitting area T2. This boundary can move at the intersection of the pixel definition layer 15 and the light-emitting functional layer 10, meaning the range of the light-transmitting area T1 can be larger, and the range of the non-light-transmitting area T2 can be relatively smaller. The light-transmitting area T1 and the non-light-transmitting area T2 are relative regions, and this embodiment does not limit the boundary between them.

[0041] The array substrate 14, from bottom to top, may include a substrate, a buffer layer, an active layer, a first gate insulating layer, a first gate, a second gate insulating layer, a second gate, an interlayer dielectric layer, a source, and a drain (not shown in the figure). The buffer layer is located on the substrate, the active layer is located on the buffer layer, and the first gate insulating layer is located on the buffer layer and covers the active layer. The first gate is located on the first gate insulating layer, and the second gate insulating layer is located on the first gate insulating layer and covers the first gate. The second gate is located on the second gate insulating layer, and the interlayer dielectric layer is located on the second gate insulating layer and covers the second gate. The source and drain are located on the interlayer dielectric layer and are connected to both ends of the active layer through vias.

[0042] The light-emitting functional layer 10 may include an anode located above the array substrate 14, a light-emitting layer located on the anode, and a cathode located on the light-emitting layer. The structure of the anode layer includes, but is not limited to, a stacked structure of ITO / Ag / ITO oxide or a single-layer ITO structure. The structure of the light-emitting layer may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer. The material of the cathode layer may be one or more of Mg, Ag, and IZO. Different light-emitting material layers can be selected to form light-emitting functional layers 10 of different colors (e.g., red, blue, and cyan), thereby presenting sub-pixels of different colors.

[0043] The light-shielding layer 11 can be a black matrix, and the color filter film 13 can include a red filter film, a green filter film, and a blue filter film. The red filter film can correspond to a red sub-pixel, the green filter film can correspond to a green sub-pixel, and the blue filter film can correspond to a blue sub-pixel.

[0044] In some embodiments, the thickness of the color filter film 13 can be 1.5 to 4 micrometers.

[0045] The display panel 100 may also include an encapsulation layer 16 and a touch layer 17. The encapsulation layer 16 is located between the light-emitting functional layer 10 and the light-shielding layer 11, and the touch layer 17 is located between the light-shielding layer 11 and the encapsulation layer 16. That is, the encapsulation layer 16 covers the pixel definition layer 15 and the light-emitting functional layer 10, and the touch layer 17 is located on the encapsulation layer 16.

[0046] In some embodiments, the side 111 of the light-shielding layer 11 and the touch layer 17 form an angle A0 toward the light-transmitting area T1, and the angle A0 may be greater than or equal to 90 degrees.

[0047] The display panel 100 may further include a planarization layer 18 and a cover plate 19. The planarization layer 18 covers the color filter film 13 and the light-shielding layer 11, and the cover plate 19 is located on the planarization layer 18. The display panel 100 in this embodiment of the application eliminates the polarizer because the polarizer reduces the light output brightness. Therefore, the display panel 100 without the polarizer can reduce power consumption.

[0048] In this embodiment, the color filter film 13 does not actually completely cover the entire light-shielding layer. Figure 1 Only the portion of the light-shielding layer 11 covered by the color filter film 13 is shown, thus the planarization layer 18 serves to planarize the light.

[0049] Figure 1 The diagram illustrates the light propagation path. The exit angles of light paths L1, L2, and L3 increase sequentially. Light path L1, with its smaller exit angle, exits normally. Light path L2, with its larger exit angle, is reflected by the reflective layer 12, resulting in a smaller exit angle. Light path L3, with its even larger exit angle, is absorbed by the light-shielding layer 11 and cannot exit. Therefore, the reflective layer 12, located on the side 111 of the light-shielding layer 11, can adjust the large-angle exit light to a small-angle exit, reducing the exit angle and the intensity of light emitted from the side, thus achieving an anti-peeping effect.

[0050] In some embodiments, the refractive index of the reflective layer 12 is less than that of the color filter film 13, so the emitted light can undergo total internal reflection on the reflective layer 12, which not only enables light emission at a small angle, but also improves the light emission rate and increases the brightness of the front light emission.

[0051] The refractive index of the reflective layer 12 can differ from the refractive index of the color filter film 13 by a certain range. For example, if the refractive index of the reflective layer 12 is 1.3 to 1.4 and the refractive index of the color filter film 13 is 1.5 to 1.7, then the refractive index of the reflective layer 12 and the refractive index of the color filter film 13 differ by at least 0.1. The reflective layer 12 may include lithium fluoride, manganese fluoride, and / or combinations thereof.

[0052] Please see Figure 2 and Figure 3 , Figure 2 These are schematic diagrams of the display panel structure provided in some embodiments of this application. Figure 3 This is a schematic diagram of the optical path of a display panel provided in some embodiments of this application. For ease of understanding and brief explanation, the same reference numerals are used for the same structures as in the above embodiments, and the same structures are not described in detail. This embodiment only describes the different structures in detail.

[0053] The display panel 200 includes an array substrate 14, a pixel definition layer 15 and a light-emitting functional layer 10 located on the array substrate 14, an encapsulation layer 16 covering the pixel definition layer 15 and the light-emitting functional layer 10, a touch layer 17 located on the encapsulation layer 16, and a light-shielding layer 11 and a reflective layer 12a located on the touch layer 17. The touch layer 17 is in contact with the light-shielding layer 11 and the reflective layer 12a. The light-shielding layer 11 is located in the non-transparent area T2, and an inverted trapezoidal groove is formed between two adjacent light-shielding layers 11. The side surface 111 of the light-shielding layer 11 forms an angle A0 with the touch layer 17, facing the transparent area T1, and the angle A0 is greater than 90 degrees. The reflective layer 12a is located on the surface of the groove, meaning that the reflective layer 12a is not only located on the side surface 111 of the light-shielding layer 11, but also on the touch layer 17, and is located between two adjacent light-shielding layers 11.

[0054] In some embodiments, the light-shielding layer 11 further includes an upper surface connected to the side surface 111 and facing away from the light-emitting functional layer 10. The reflective layer 12a may be located on the groove surface and the upper surface of the light-shielding layer 11, that is, the reflective layer 12a not only covers the side surface 111 of the light-shielding layer 11, but also covers the upper surface of the light-shielding layer 11 and the surface of the touch layer 17 not covered by the light-shielding layer 11 (i.e., the surface of the light-transmitting area T1 touch layer 17).

[0055] In some embodiments, the reflective layer 12a is a continuous film layer with the same thickness at all locations. The term "thickness" as used in this application refers to the thickness perpendicular to the direction of film extension.

[0056] In some embodiments, the thickness of the reflective layer 12a is less than the thickness of the light-shielding layer 11. For example, the thickness of the reflective layer 12a is 30–300 nanometers, and the thickness of the light-shielding layer 11 is 1–2 micrometers. The portion of the reflective layer 12a located on the side 111 of the light-shielding layer 11 can be referred to as the reflective surface 121, and the area of ​​the reflective surface 121 can be determined by the thickness (or height) of the light-shielding layer 11 and the thickness of the reflective layer 12a. When the thickness of the light-shielding layer 11 is much greater than the thickness of the reflective layer 12a, the area of ​​the reflective surface 121 is relatively large.

[0057] like Figure 3 As shown, light paths A, B, C, D, and E represent light emitted from the light-emitting functional layer 10 at progressively increasing angles. Light emitted at smaller angles exits along paths A and B, while light emitted at larger angles is reflected or totally internally reflected at the emitting surface along path C, resulting in a smaller exit angle. Light emitted at even larger angles is absorbed by the light-shielding layer 11 along path D, and light emitted at the largest angle is reflected or totally internally reflected at the interface between the reflective layer 12a and the touch layer 17 along path E, preventing it from exiting.

[0058] Since the thickness of the reflective layer 12a is much smaller than that of the light-shielding layer 11, the reflective surface 121 can be increased. Therefore, the path D can be reduced and the path C can be increased, which reduces the light loss caused by the light absorption of the light-shielding layer 11 and increases the reflected light of the reflective layer 12a, thereby improving the light intensity emitted from the front and reducing power consumption.

[0059] The display panel provided in this application embodiment includes a light-transmitting area T1 and non-light-transmitting areas T2 located on both sides of the light-transmitting area T1. The display panel 100 includes a light-emitting functional layer 10, a light-shielding layer 11, a reflective layer 12 / 12a, and a color filter film 13. The light-emitting functional layer 10 is located in the light-transmitting area T1, and the light-shielding layer 11 is located above the light-emitting functional layer 10 and in the non-light-transmitting area T2. The light-shielding layer 11 includes a side surface 111 near the light-transmitting area T1, and the reflective layer 12 / 12a covers the side surface 111 of the light-shielding layer 11. The color filter film 13 is located in the light-transmitting area T1 and between two adjacent light-shielding layers 11. Since the reflective layer 12 / 12a is located between the light-shielding layer 11 and the color filter film 13, the large-angle light emitted from the light-emitting functional layer 10 can be reflected by the reflective layer 12 or the reflective surface 121, obtaining a smaller emission angle and achieving the privacy function of the display panel.

[0060] Current mainstream anti-spy functions are achieved by adding a privacy film on top of the phone screen cover. However, this method dims the screen, limits the effectiveness of high-brightness mode, and significantly increases power consumption for the same brightness requirements. This embodiment eliminates the need for a privacy film on the cover 19 to achieve the anti-spy function, thus avoiding power loss caused by an external privacy film.

[0061] This application also provides a display device, which includes the display panel provided in any of the above embodiments. This display device has the same beneficial effects as the aforementioned display panel, and will not be described again here.

[0062] The above description of the embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application; those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display panel, characterized in that, The display panel includes a light-transmitting area and non-light-transmitting areas located on both sides of the light-transmitting area, and the display panel includes at least: A light-emitting functional layer is located in the light-transmitting area; A light-shielding layer is located above the light-emitting functional layer and in the non-transparent area. The light-shielding layer includes a side surface close to the light-transparent area and an upper surface connected to the side surface and facing away from the light-emitting functional layer. A groove is provided between two adjacent light-shielding layers. An encapsulation layer is located between the light-emitting functional layer and the light-shielding layer; The touch layer is located between the light-shielding layer and the encapsulation layer; A reflective layer covering the side surface of the light-shielding layer and the surface of the touch layer exposed by the groove, and the upper surface of the light-shielding layer, the reflective layer comprising lithium fluoride, manganese fluoride, and / or combinations thereof; A colored filter film is located in the light-transmitting area and between two adjacent light-shielding layers; The reflective layer is located between the light-shielding layer and the color filter film.

2. The display panel according to claim 1, characterized in that, The refractive index of the reflective layer is less than that of the color filter film.

3. The display panel according to claim 2, characterized in that, The refractive index of the reflective layer is 1.3 to 1.4, and the refractive index of the color filter film is 1.5 to 1.

7.

4. The display panel according to claim 2, characterized in that, The thickness of the reflective layer is less than the thickness of the light-shielding layer.

5. The display panel according to claim 4, characterized in that, The thickness of the reflective layer is 30-300 nanometers, and the thickness of the light-shielding layer is 1-2 micrometers.

6. The display panel according to claim 2, characterized in that, The display panel also includes: A planarization layer covers the color filter film and the light-shielding layer; A cover plate is located on the flat layer.

7. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1-6.

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