Flexible display panel and display device

Abstract

The application provides a flexible display panel and a display device, the flexible display panel comprises a curved display area and a planar display area, and the flexible display panel comprises a substrate, a light-emitting layer and a first lens layer; wherein the light-emitting layer is arranged on the substrate and comprises a plurality of sub-pixels; the first lens layer is arranged on the side of the light-emitting layer away from the substrate and comprises a plurality of first microlenses arranged at intervals; in the surface in which the substrate is located, the first microlenses do not overlap the sub-pixels; and the thickness of the first microlenses located in the curved display area is smaller than the thickness of the first microlenses located in the planar display area. The flexible display panel and the display device of the application reduce the problem of color deviation of the flexible display panel located in the curved display area, and improve the display effect of the flexible display panel.

Description

Technical Field

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

[0002] Flexible display panels are widely used in the display field due to their excellent light-emitting performance, high contrast, wide viewing angle, and extremely low power consumption. With the increasing demand for flexible display panels, improving their display performance has become a research hotspot. Summary of the Invention

[0003] The main technical problem this application addresses is the issue of color deviation in flexible display panels located in curved display areas compared to flexible display panels located in flat display areas.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: a flexible display panel, including a curved display area and a flat display area, comprising:

[0005] Substrate;

[0006] The light-emitting layer is disposed on the substrate and includes multiple sub-pixels;

[0007] The first lens layer is disposed on the side of the light-emitting layer away from the substrate, and includes a plurality of first microlenses spaced apart from the substrate;

[0008] In this configuration, when projected onto the surface of the substrate, the first microlens does not overlap with the sub-pixel; and the thickness of the first microlens located in the curved display area is less than the thickness of the first microlens located in the flat display area.

[0009] In some embodiments, the thickness gradient of the first microlens located in the curved display area decreases along the direction from the starting arc line to the ending arc line.

[0010] In some embodiments, the sidewalls of the first microlens are inclined; the cross-sectional area of ​​the first microlens gradually decreases along the direction from the light-emitting layer to the first lens layer.

[0011] Preferably, the angle between the sidewall of the first microlens located in the curved display area and the positive normal direction of the light-emitting layer is the first angle; the angle between the sidewall of the first microlens located in the planar display area and the positive normal direction of the light-emitting layer is the second angle; the first angle is smaller than the second angle.

[0012] In some embodiments, when projected onto the surface of the substrate, the distance between the first microlens located in the curved display area and its adjacent sub-pixels is smaller than the distance between the first microlens located in the planar display area and its adjacent sub-pixels.

[0013] In some embodiments, the projection is made within the surface of the substrate, and the first microlens is located between a plurality of sub-pixels;

[0014] The first microlens includes multiple sub-parts that are adjacent to the aforementioned multiple sub-pixels, and the multiple sub-parts may have the same or different thicknesses;

[0015] Preferably, the colors of the multiple sub-pixels are different, and the thicknesses of the multiple sub-parts are different;

[0016] Preferably, the projection is made within the surface of the substrate, and the first microlens is located between two sub-pixels with different emission colors. The first microlens includes two sub-parts that are adjacent to the two sub-pixels respectively, and the two sub-parts have different thicknesses.

[0017] In some embodiments, the flexible display panel further includes a refractive layer; the refractive layer is disposed on the side of the first lens layer away from the light-emitting layer, and the refractive layer covers the first lens layer;

[0018] Preferably, the refractive index of the first lens layer is less than the refractive index of the refractive layer.

[0019] In some embodiments, a plurality of second microlenses are formed on the side of the refractive layer facing the first lens layer, and the plurality of second microlenses correspond one-to-one with a plurality of sub-pixels;

[0020] Preferably, the orthogonal projection of the second microlens onto the substrate covers the orthogonal projection of the corresponding sub-pixel onto the substrate.

[0021] In some embodiments, the flexible display panel further includes an optical adhesive layer disposed on the side of the refractive layer away from the light-emitting layer;

[0022] Optionally, the optical adhesive layer is disposed on the surface of the refractive layer away from the light-emitting layer;

[0023] Optionally, the refractive index of the optical adhesive layer is less than that of the first lens layer.

[0024] In some embodiments, the flexible display panel further includes an encapsulation layer disposed between the light-emitting layer and the first lens layer;

[0025] Optionally, the encapsulation layer is disposed on the surface of the light-emitting layer near the first lens layer.

[0026] To solve the above-mentioned technical problems, another technical solution adopted in this application is: a display device, including any of the flexible display panels provided above.

[0027] Beneficial Effects: Embodiments of this application provide a flexible display panel and a display device. The flexible display panel includes a curved display area and a flat display area. The flexible display panel includes a substrate, a light-emitting layer, and a first lens layer. The light-emitting layer is disposed on the substrate and includes multiple sub-pixels. The first lens layer is disposed on the side of the light-emitting layer away from the substrate and includes multiple spaced-apart first microlenses. Projected onto the surface of the substrate, the first microlenses do not overlap with the sub-pixels. Furthermore, the thickness of the first microlens located in the curved display area is less than the thickness of the first microlens located in the flat display area. The flexible display panel and display device provided by the embodiments of this application improve the problem of color shift in the flexible display panel located in the curved display area compared to the flexible display panel located in the flat display area by setting the thickness of the first microlens located in the curved display area to be less than the thickness of the first microlens located in the flat display area. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0029] Figure 1 This is a first structural schematic diagram of a flexible display panel provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the second structure of the flexible display panel provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the third structure of a flexible display panel provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the fourth structure of the flexible display panel provided in an embodiment of this application;

[0033] Figure 5 This is a fifth structural schematic diagram of a flexible display panel provided in an embodiment of this application;

[0034] Figure 6 This is a sixth structural schematic diagram of a flexible display panel provided in an embodiment of this application;

[0035] Figure 7 This is a seventh structural schematic diagram of a flexible display panel provided in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0037] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Please see Figure 1 , Figure 1 This is a first structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0042] See Figure 1This application provides a flexible display panel 100, including a curved display area BB and a flat display area AA. The flexible display panel 100 includes a substrate BL, a light-emitting layer 10, and a first lens layer 20. The light-emitting layer 10 is disposed on the substrate BL and includes a plurality of sub-pixels 101. The first lens layer 20 is disposed on the side of the light-emitting layer 10 away from the substrate BL and includes a plurality of first microlenses 201 spaced apart. When projected onto the surface of the substrate BL, the first microlenses 201 and the sub-pixels 101 do not overlap; and the thickness H1 of the first microlens 201 located in the curved display area BB is less than the thickness H2 of the first microlens 201 located in the flat display area AA.

[0043] In one or more embodiments of this application, the flexible display panel 100 represents a bendable display device made of flexible material, possessing advantages such as wide color gamut, fast response, high contrast, low power consumption, and no need for backlighting, and is widely used in various fields. Exemplarily, the flexible display panel 100 provided in the embodiments of this application can be applied to mobile phones, computers, e-readers, electronic display screens, augmented / virtual reality devices, media players, wearable devices, digital cameras, car navigation systems, and other fields. In one or more embodiments of this application, the flexible display panel 100 can be an organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, a micro-LED display panel, a mini-LED display panel, or a liquid crystal display panel. The embodiments of this application use a flexible OLED display panel as an example to illustrate the flexible display panel 100 provided in the embodiments of this application.

[0044] In one or more embodiments of this application, the flexible display panel 100 includes a curved display area BB and a flat display area AA. In one or more embodiments of this application, the curved display area BB represents a bendable display area on the flexible display panel 100. The flat display area AA represents a non-bendable display area on the flexible display panel 100. In one or more embodiments of this application, the flexible display panel 100 also includes a non-display area. In one or more embodiments of this application, the non-display area is disposed around the curved display area BB and the flat display area AA. In one or more embodiments of this application, the non-display area is disposed on one side of the curved display area BB and / or the flat display area AA. In one or more embodiments of this application, the flexible display panel 100 may include one curved display area BB or multiple curved display areas BB. In one or more embodiments of this application, the flexible display panel 100 includes one flat display area AA or multiple flat display areas AA. In one or more embodiments of this application, two adjacent curved display areas BB are spaced apart by the flat display areas AA.

[0045] In one or more embodiments of this application, the light-emitting layer 10 is used to realize the light-emitting display of the flexible display panel 100. In one or more embodiments of this application, the light-emitting layer 10 may include an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, an electron injection layer, and a cathode (not shown). In one or more embodiments of this application, the light-emitting layer 10 includes a plurality of spaced sub-pixels 101. In one or more embodiments of this application, the plurality of spaced sub-pixels 101 are arranged in an orderly manner to simplify structural design and processing. In one or more embodiments of this application, the sub-pixels 101 of the light-emitting layer 10 may be organic light-emitting diodes (OLEDs), quantum dot light-emitting diodes (QLEDs), micro-LEDs, mini-LEDs, or liquid crystals. The embodiments of this application use a flexible organic light-emitting diode (OLED) as an example to illustrate the sub-pixels 101 provided in the embodiments of this application.

[0046] The inventors of this application have noted that the flexible display panel 100 is affected by the interfacial plasma polarity between the cathode and the organic light-emitting layer of the light-emitting layer 10 and the anode reflection. Most of the emitted light is confined inside the device rather than being output coupled, which reduces the light extraction efficiency of the flexible display panel 100 and limits the display effect of the flexible display panel 100.

[0047] The embodiments of this application improve the light extraction efficiency of the flexible display panel 100 by providing a first lens layer 20 on the light-emitting surface side of the light-emitting layer 10. Specifically, the principle of total internal reflection of the first microlens 201 (micro lens array) structure of the first lens layer 20 is used to adjust the incident angle when the light reaches the cover plate interface, thereby improving the light extraction efficiency of the light-emitting layer 10.

[0048] Furthermore, the inventors of this application noted that when the first microlens 201 located in the curved display area BB and the flat display area AA are the same, in response to the flexible display panel 100 being in a curved state, some of the light emitted from the sub-pixel 101 located in the curved display area BB is focused by the corresponding first microlens 201 and deflected away from the normal viewing angle. As a result, the brightness decay of the flexible display panel 100 located in the curved display area BB at the normal viewing angle is reduced compared to the brightness decay (brightness attenuation) of the flexible display panel 100 located in the flat display area AA at the normal viewing angle. The flexible display panel 100 located in the curved display area BB exhibits color deviation compared to the flexible display panel 100 located in the flat display area AA.

[0049] In one or more embodiments of this application, by setting the thickness H1 of the first microlens 201 located in the curved display area BB to be less than the thickness H2 of the first microlens 201 located in the flat display area AA, the problem of color shift in the flexible display panel 100 located in the curved display area BB relative to the flexible display panel 100 located in the flat display area AA is improved. Specifically, when the thickness H1 of the first microlens 201 located in the curved display area BB is less than the thickness H2 of the first microlens 201 located in the flat display area AA, in response to the flexible display panel 100 being in a curved state, the light emitted by the sub-pixel 101 located in the curved display area BB passes through the high-low refractive interface (see...). Figure 1 The interface between the first microlens 201 and the refractive layer 30 shown reduces the amount of light reflected to the normal viewing angle, thereby accelerating the brightness decay of the flexible display panel 100 located in the curved display area BB. This balances the brightness decay of the flexible display panel 100 located in the flat display area AA and the curved display area BB at the normal viewing angle, thereby reducing the color shift problem of the flexible display panel 100 located in the curved display area BB and improving the display effect of the flexible display panel 100.

[0050] Please see Figure 2 , Figure 2 This is a schematic diagram of the second structure of the flexible display panel provided in an embodiment of this application.

[0051] In some embodiments, see Figure 2 The flexible display panel 100 provided in this embodiment and Figure 1 The difference in the provided flexible display panel 100 is that the thickness H1 of the first microlens 201 located in the curved display area BB decreases in the direction from the starting arc S to the ending arc C.

[0052] In the embodiments of this application, the starting arc S represents a virtual dividing line between the curved display area BB and the adjacent flat display area AA. The ending arc C represents the edge of the curved display area BB away from the adjacent flat display area AA.

[0053] In one or more embodiments of this application, by reducing the thickness H1 gradient of the first microlens 201 located in the curved display area BB along the direction from the starting arc S to the ending arc C, more light emitted by the multiple sub-pixels 101 located in the curved display area BB is emitted at a positive viewing angle, thereby further reducing the occurrence of color deviation in the flexible display panel 100 located in the curved display area BB.

[0054] In some embodiments, please continue to see Figure 1 and Figure 2The sidewall 201a of the first microlens 201 is inclined. Along the direction from the light-emitting layer 10 to the first lens layer 20, the cross-sectional area of ​​the first microlens 201 gradually decreases.

[0055] In the embodiments of this application, the sidewall 201a of the first microlens 201 is inclined. Along the direction from the light-emitting layer 10 to the first lens layer 20, the cross-sectional area of ​​the first microlens 201 gradually decreases, making the first microlens 201 have an inverted shape with a large bottom and a small top. For example, the cross-sectional shape of the first microlens 201 along the direction from the light-emitting layer 10 to the first lens layer 20 is trapezoidal, so that more light emitted from the sub-pixel 101 is focused in the light-emitting direction by the first microlens 201, thereby improving the light emission brightness of the flexible display panel 100.

[0056] Please see Figure 3 , Figure 3 This is a third structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0057] In some embodiments, see Figure 3 The flexible display panel 100 provided in this embodiment and Figure 2 The difference in the provided flexible display panel 100 is that: the angle between the sidewall 201a of the first microlens 201 located in the curved display area BB and the positive direction of the normal M of the light-emitting layer 10 is the first angle θ1; the angle between the sidewall 201a of the first microlens 201 located in the flat display area AA and the positive direction of the normal M of the light-emitting layer 10 is the second angle θ2; the first angle θ1 is smaller than the second angle θ2.

[0058] In the embodiments of this application, "the positive direction of the normal M of the light-emitting layer 10" refers to the normal direction pointing from the interior of the light-emitting layer 10 to the side emitting light.

[0059] In one or more embodiments of this application, by making the first included angle θ1 smaller than the second included angle θ2, the brightness decay of the flexible display panel 100 located in the curved display area BB is accelerated, thereby balancing the brightness decay of the flexible display panel 100 located in the flat display area AA and the curved display area BB at the normal viewing angle and improving the display effect of the flexible display panel 100.

[0060] In some embodiments, please continue to see Figures 1-3 Projected onto the surface of the substrate BL, the distance between the first microlens 201 located in the curved display area BB and its adjacent sub-pixel 101 is smaller than the distance between the first microlens 201 located in the flat display area AA and its adjacent sub-pixel 101.

[0061] In the embodiments of this application, the distance between the minimum contour of the orthographic projection of the first microlens 201 onto the substrate BL and the maximum contour of the orthographic projection of its adjacent sub-pixel 101 onto the substrate BL is defined as the outward expansion distance. Projected within the surface of the substrate BL, the distance between the first microlens 201 located in the curved display area BB and its adjacent sub-pixel 101 is defined as the outward expansion distance L1; projected within the surface of the substrate BL, the distance between the first microlens 201 located in the planar display area AA and its adjacent sub-pixel 101 is defined as the outward expansion distance L2.

[0062] In one or more embodiments of this application, by making the outward extension distance L1 of the first microlens 201 located in the curved display area BB relative to its adjacent sub-pixel 101 smaller than the outward extension distance L2 of the first microlens 201 located in the flat display area AA relative to its adjacent sub-pixel 101, the outward extension distance L1 of the first microlens 201 located in the curved display area BB relative to its adjacent sub-pixel 101 is optimized, thereby accelerating the brightness decay of the sub-pixel 101 in the curved display area BB, balancing the brightness decay of the flexible display panel 100 located in the flat display area AA and the curved display area BB at the positive viewing angle, and improving the problem of color shift in the flexible display panel 100.

[0063] In one or more embodiments of this application, the first microlens 201 is laid flat on the buried interface by inkjet printing.

[0064] Please see Figure 4 , Figure 4 This is a fourth structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0065] In some embodiments, see Figures 1-4 Projected onto the surface of the substrate BL, the first microlens 201 is located between multiple sub-pixels 101;

[0066] See Figure 4 The first microlens 201 includes a plurality of sub-parts 2011 that are adjacent to the plurality of sub-pixels 101, and the plurality of sub-parts 2011 may have the same or different thicknesses.

[0067] Preferably, see Figure 4 Multiple sub-pixels 101 have different colors, and multiple sub-pixels 2011 have different thicknesses;

[0068] Preferably, see Figure 4 Projected onto the surface of the substrate BL, the first microlens 201 is located between two sub-pixels 101 with different emission colors. The first microlens 201 includes two sub-parts 2011 that are adjacent to the two sub-pixels 101 respectively, and the two sub-parts 2011 have different thicknesses.

[0069] In embodiments of this application, the light-emitting layer 10 includes sub-pixels 101 of multiple colors, and the light emitted by sub-pixels 101 of different colors has different energy. In some embodiments, the sub-pixels 101 of multiple colors include at least two of red sub-pixels 1011, green sub-pixels 1012, and blue sub-pixels 1013.

[0070] In one or more embodiments of this application, when the flexible display panel 100 is in a bent state, the different colored sub-pixels 101 located in the bent display area BB are affected by the first lens layer 20 and attenuate to different degrees, resulting in color shift in the synthesized white light. Specifically, the light emitted by the red sub-pixel 1011 and / or the green sub-pixel 1012 attenuates faster than that emitted by the blue sub-pixel 1013. To improve the color shift problem of the flexible display panel 100 located in the curved display area BB, the thickness of the multiple sub-parts 2011 of the first microlens 201 adjacent to multiple sub-pixels 101 is adjusted. Specifically, the thickness of the sub-parts 2011 of the first microlens 201 adjacent to the red sub-pixel 1011 and / or the green sub-pixel 1012 is less than the thickness of the sub-parts 2011 of the first microlens 201 adjacent to the blue sub-pixel 1013. This further reduces the attenuation of the light emitted by the red sub-pixel 1011 and / or the green sub-pixel 1012, making the proportion of each color light in the mixed light emitted by the flexible display panel 100 located in the curved display area BB and the flat display area AA similar, thereby improving the visual experience of the flexible display panel 100 located in the curved display area BB without increasing power consumption.

[0071] For example, in some embodiments, the light-emitting layer 10 includes a red sub-pixel 1011 and a green sub-pixel 1012, and the thickness of the first microlens 201 adjacent to the green sub-pixel 1012 is less than the thickness of the sub-portion 2011 adjacent to the red sub-pixel 1011. In some embodiments, the light-emitting layer 10 includes a green sub-pixel 1012 and a blue sub-pixel 1013, and the thickness of the first microlens 201 adjacent to the green sub-pixel 1012 is less than the thickness of the sub-portion 2011 adjacent to the blue sub-pixel 1013. In some embodiments, the light-emitting layer 10 includes a red sub-pixel 1011 and a blue sub-pixel 1013, and the thickness of the first microlens 201 adjacent to the red sub-pixel 1011 is less than the thickness of the sub-portion 2011 adjacent to the blue sub-pixel 1013. In some embodiments, see Figure 4 The light-emitting layer 10 includes a red sub-pixel 1011, a green sub-pixel 1012, and a blue sub-pixel 1013. The thickness of the sub-part 2011 of the first microlens 201 adjacent to the green sub-pixel 1012 is less than the thickness of the sub-part 2011 adjacent to the red sub-pixel 1011 or the blue sub-pixel 1013, and the thickness of the sub-part 2011 adjacent to the red sub-pixel 1011 is less than the thickness of the sub-part 2011 adjacent to the blue sub-pixel 1013.

[0072] Please see Figure 5 , Figure 5 This is a fifth structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0073] In some embodiments, see Figure 5 The flexible display panel 100 also includes a refractive layer 30. The refractive layer 30 is disposed on the side of the first lens layer 20 away from the light-emitting layer 10, and the refractive layer 30 covers the first lens layer 20.

[0074] In one or more embodiments of this application, the refractive layer 30 is used to cause large-angle light rays emitted by multiple sub-pixels 101 to undergo total internal reflection at the junction of multiple first microlenses 201 and the refractive layer 30, causing the large-angle light rays to converge towards the central region and finally be emitted to the outside of the display panel, reducing the light emission loss of the light-emitting layer 10. In addition, the refractive layer 30 also has the function of flattening the first lens layer 20, reducing the manufacturing difficulty of the flexible display panel 100.

[0075] In some embodiments, the refractive index of the first lens layer 20 is less than the refractive index of the refractive layer 30.

[0076] In one or more embodiments of this application, there are certain requirements for the refractive index of the materials of the first lens layer 20 and the refractive layer 30, that is, the refractive index of the first lens layer 20 is less than the refractive index of the refractive layer 30, so as to achieve the converging effect of large-angle light emitted from the light-emitting layer 10.

[0077] Please see Figure 6 , Figure 6 This is a sixth structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0078] In some embodiments, see Figure 6 , Figure 6 The flexible display panel 100 shown is Figure 5 The difference of the flexible display panel 100 shown is that a plurality of second microlenses 202 are formed on the side of the refractive layer 30 facing the first lens layer 20, and the plurality of second microlenses 202 correspond one-to-one with a plurality of sub-pixels 101.

[0079] Preferably, the orthographic projection of the second microlens 202 on the substrate BL covers the orthographic projection of the corresponding sub-pixel 101 on the substrate BL, so that the light emitted by the second microlens 202 from the sub-pixel 101 can be converged over a larger range.

[0080] In some embodiments of this application, the second microlens 202 is made of transparent material and is configured one-to-one with the sub-pixels 101 located in the light-emitting layer 10. This allows the light emitted from the sub-pixels 101 of the light-emitting layer 10 to be converged after passing through the second microlens 202, thereby improving the light emission efficiency of the sub-pixels 101 of the light-emitting layer 10. Furthermore, compared to... Figure 5 As shown in the flexible display panel 100 including the refractive layer 30, such as Figure 6 The thickness of the flexible display panel 100 shown is not increased, so that the flexible display panel 100 can achieve the light-gathering effect of the second microlenses 202 by forming a plurality of second microlenses 202 on the side of the refractive layer 30 facing the first lens layer 20 without increasing the film thickness.

[0081] Please see Figure 7 , Figure 7 This is a seventh structural schematic diagram of a flexible display panel provided in an embodiment of this application.

[0082] In some embodiments, see Figure 7 , Figure 7 The flexible display panel 100 shown is Figure 6 The difference of the flexible display panel 100 shown is that the flexible display panel 100 also includes an optical adhesive layer 50, which is disposed on the side of the refractive layer 30 away from the light-emitting layer 10.

[0083] In one or more embodiments of this application, the optical adhesive layer 50 serves to adhere the functional layer, buffer impacts, and protect the functional layer. In one or more embodiments of this application, the optical adhesive layer 50 is made of a transparent material to reduce its impact on the light emission of the flexible display panel 100.

[0084] In some embodiments, see Figure 7 The optical adhesive layer 50 is disposed on the surface of the refractive layer 30 away from the light-emitting layer 10.

[0085] In one or more embodiments of this application, one side of the optical adhesive layer 50 is used to bond the refractive layer 30, and the other side is used to bond other functional layers.

[0086] In some embodiments, the refractive index of the optical adhesive layer 50 is less than the refractive index of the first lens layer 20.

[0087] In one or more embodiments of this application, there are certain requirements for the refractive index of the material of the optical adhesive layer 50, that is, the refractive index of the optical adhesive layer 50 is less than the refractive index of the first lens layer 20. As can be seen from the foregoing, in some embodiments, the refractive index of the first lens layer 20 is less than the refractive index of the refractive layer 30. It is known that the refractive index of the optical adhesive layer 50 is less than the refractive index of the refractive layer 30, so that the large-angle light emitted from the light-emitting layer 10 is converged by the refractive layer 30 and then diffused to a certain extent by the optical adhesive layer 50, thereby increasing the light-emitting area of ​​the corresponding flexible display panel 100 and improving the display effect of the flexible display panel 100.

[0088] In some embodiments, please continue to see Figures 1-7 The flexible display panel 100 also includes an encapsulation layer 40, which is disposed between the light-emitting layer 10 and the first lens layer 20.

[0089] In one or more embodiments of this application, the encapsulation layer 40 is used to prevent water, oxygen, and other substances from the external environment from corroding the functional layer. In one or more embodiments of this application, the encapsulation layer 40 comprises multiple layers of organic thin films and multiple layers of inorganic thin films alternately stacked. In one or more embodiments of this application, the surface of the encapsulation layer 40 is an inorganic encapsulation film, such as silicon oxide or other inorganic oxides.

[0090] In some embodiments, see continue to see Figures 1-7 The encapsulation layer 40 is disposed on the surface of the light-emitting layer 10 near the first lens layer 20.

[0091] In one or more embodiments of this application, the encapsulation layer 40 is used to block water, oxygen, and other substances in the external environment from corroding the light-emitting layer 10, thereby extending the service life of the light-emitting layer 10.

[0092] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0093] See Figure 8 An embodiment of this application provides a display device 400, including any of the flexible display panels 100 provided above.

[0094] In one or more embodiments of this application, the provided display device 400 includes the flexible display panel 100 of any of the above embodiments, and also includes a control board 200 and a bezel 300. The display panel 100 is electrically connected to the control board 200, and the control board 200 is provided with a driver IC (not shown).

[0095] The display device 400 can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0097] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0098] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A flexible display panel, comprising a curved display area and a flat display area, characterized in that, include: Substrate; A light-emitting layer is disposed on the substrate and includes multiple sub-pixels; The first lens layer is disposed on the side of the light-emitting layer away from the substrate and includes a plurality of first microlenses spaced apart. Wherein, when projected onto the surface of the substrate, the first microlens does not overlap with the sub-pixel; and the thickness of the first microlens located in the curved display area is less than the thickness of the first microlens located in the flat display area; Projected onto the surface of the substrate, the first microlens located in the curved display area has a smaller outward extension distance relative to its adjacent sub-pixel than the first microlens located in the planar display area.

2. The flexible display panel according to claim 1, characterized in that, Along the direction from the starting line to the ending line of the curved display area, the thickness gradient of the first microlens located in the curved display area decreases.

3. The flexible display panel according to claim 1 or 2, characterized in that, The sidewalls of the first microlens are inclined; along the direction from the light-emitting layer to the first lens layer, the cross-sectional area of ​​the first microlens gradually decreases.

4. The flexible display panel according to claim 3, characterized in that, The angle between the sidewall of the first microlens located in the curved display area and the positive normal direction of the light-emitting layer is the first included angle; the angle between the sidewall of the first microlens located in the planar display area and the positive normal direction of the light-emitting layer is the second included angle; the first included angle is smaller than the second included angle.

5. The flexible display panel according to claim 1, characterized in that, Projected onto the surface of the substrate, the first microlens is located between the plurality of sub-pixels; The first microlens includes a plurality of sub-parts adjacent to the plurality of sub-pixels, and the plurality of sub-parts may have the same or different thicknesses.

6. The flexible display panel according to claim 5, characterized in that, The multiple sub-pixels have different colors, and the multiple sub-parts have different thicknesses.

7. The flexible display panel according to claim 5, characterized in that, Projected onto the surface of the substrate, the first microlens is located between two sub-pixels with different emission colors. The first microlens includes two sub-parts adjacent to the two sub-pixels, and the two sub-parts have different thicknesses.

8. The flexible display panel according to claim 1, characterized in that, It also includes a refractive layer; the refractive layer is disposed on the side of the first lens layer away from the light-emitting layer, and the refractive layer covers the first lens layer.

9. The flexible display panel according to claim 8, characterized in that, The refractive index of the first lens layer is less than that of the refractive layer.

10. The flexible display panel according to claim 8 or 9, characterized in that, A plurality of second microlenses are formed on the side of the refractive layer facing the first lens layer, and the plurality of second microlenses correspond one-to-one with the plurality of sub-pixels.

11. The flexible display panel according to claim 10, characterized in that, The orthogonal projection of the second microlens onto the substrate overlaps the orthogonal projection of the corresponding sub-pixel onto the substrate.

12. The flexible display panel according to claim 10, characterized in that, The flexible display panel further includes an optical adhesive layer, which is disposed on the side of the refractive layer away from the light-emitting layer.

13. The flexible display panel according to claim 12, characterized in that, The optical adhesive layer is disposed on the surface of the refractive layer away from the light-emitting layer.

14. The flexible display panel according to claim 12, characterized in that, The refractive index of the optical adhesive layer is less than that of the first lens layer.

15. The flexible display panel according to claim 1, characterized in that, It also includes an encapsulation layer, which is disposed between the light-emitting layer and the first lens layer.

16. The flexible display panel according to claim 15, characterized in that, The encapsulation layer is disposed on the surface of the light-emitting layer near the first lens layer.

17. A display device, characterized in that, Includes the flexible display panel according to any one of claims 1 to 16.

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