Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display. The light modulation assembly is arranged in the area where the carving seam is located, the light modulation assembly comprises the first film layer and the second film layer which are arranged in the first direction in a stacked mode, the refractive index of the first film layer is larger than that of the second film layer, and after large-view-angle emergent light of the light-emitting element in the display panel enters the light modulation assembly, the large-view-angle emergent light is emitted to the light modulation assembly. When the first film layer and the second film layer are etched, total reflection occurs on the interface of the first film layer and the second film layer and cannot be refracted from the interface, so that the phenomenon of light leakage at the etching seam is avoided, etching lines are improved, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] With the continuous advancement of display technology, display panels have become a common means of human-computer interaction between users and electronic devices. To improve interaction efficiency, display panels can be equipped with touch functions. To add touch functionality to display panels, a touch screen is typically installed on the display side of the display panel. This makes the entire display device thicker, resulting in a poor user experience.

[0003] In order to adapt to the trend of thinner and lighter display panels or display devices, the touch function layer may be disposed inside the display panel or the display device.

[0004] In the prior art, slits are provided on the touch traces in the touch function layer. At these slit locations, light leakage occurs when the light-emitting element emits light at a wide viewing angle. However, other locations on the touch traces without slits block light and do not leak. This results in the visible, regular etched lines, which affect the display quality of the display panel. Summary of the Invention

[0005] In view of the above problems, the present application provides a display panel and a display device to achieve the purpose of improving the display effect of the display panel. The specific solution is as follows:

[0006] A first aspect of the present application provides a display panel, the display panel comprising: a light modulation component and a touch function layer;

[0007] The touch function layer includes a plurality of touch traces; wherein at least some of the touch traces are provided with slits;

[0008] The light modulation component is located in the area where the slit is located; the light modulation component includes a first film layer and a second film layer stacked in a first direction, and the refractive index of the first film layer is greater than the refractive index of the second film layer; the first direction is perpendicular to the plane where the touch function layer is located and points to the light output side of the display panel.

[0009] A second aspect of the present application provides a display device, which includes the display panel described above.

[0010] By means of the above technical solution, the present application provides a display panel and a display device, wherein a light modulation component is arranged in the area where the slit is located, and the light modulation component includes a first film layer and a second film layer stacked in a first direction, and the refractive index of the first film layer is greater than the refractive index of the second film layer. After the wide-angle light emitted by the light-emitting element in the display panel enters the light modulation component, it will be totally reflected at the interface between the first film layer and the second film layer, and will not be refracted from the interface, so that there will be no light leakage at the slit, thereby improving the etching lines and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0012] Figure 1 A schematic diagram of a layout of slits provided in an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of a special-shaped slit provided in an embodiment of the present invention;

[0014] Figure 3 A schematic diagram of a double-layer touch wiring provided by an embodiment of the present invention;

[0015] Figure 4 A schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0016] Figure 5 An embodiment of the present invention provides a Figure 4 Schematic diagram of the cross section of the AA' cutting line;

[0017] Figure 6 An embodiment of the present invention provides a Figure 4 Schematic diagram of the cross section of the BB' cutting line;

[0018] Figure 7 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0019] Figure 8 A schematic structural diagram of a display function layer provided by an embodiment of the present invention;

[0020] Figure 9 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0021] Figure 10 A schematic cross-sectional view of a display panel provided by an embodiment of the present invention;

[0022] Figure 11 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0023] Figure 12 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0024] Figure 13 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0025] Figure 14 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0026] Figure 15 One of the partial structural schematic diagrams corresponding to a method of preparing a display panel provided by an embodiment of the present invention;

[0027] Figure 16 A second schematic diagram of a partial structure corresponding to a method of preparing a display panel according to an embodiment of the present invention;

[0028] Figure 17 A third schematic diagram of a partial structure corresponding to a method of preparing a display panel according to an embodiment of the present invention;

[0029] Figure 18 A fourth schematic diagram of a partial structure corresponding to a method of preparing a display panel according to an embodiment of the present invention;

[0030] Figure 19 A fifth schematic diagram of a partial structure corresponding to a method of preparing a display panel according to an embodiment of the present invention;

[0031] Figure 20 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0032] Figure 21 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0033] Figure 22 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0034] Figure 23 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application. It is known to those skilled in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0036] It should be noted that the directional words appearing in the present invention are based on the relative position relationship shown in the drawings and cannot be used as an absolute limitation to the present application.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] refer to Figure 1 , Figure 1 A schematic diagram of the layout of a slit provided in an embodiment of the present invention. Assume that the upper and lower parts belong to two signal lines (also referred to as trace lines in this field), namely signal line L1 and signal line L2. In order to solve the problem of light leakage in the slit 10, in a possible implementation, as shown in FIG. Figure 1 As shown, the slit 10 can be set at the edge of the sub-pixel 11.

[0039] refer to Figure 2 , Figure 2 A schematic diagram of a special-shaped slit provided in an embodiment of the present invention; Figure 2 (a) shows a way to realize the special-shaped slit. Figure 2 In (b), another implementation of the special-shaped slit is shown. In order to solve the problem of light leakage in the slit 10, in a possible implementation, as shown in FIG. Figure 2 As shown, the slit 10 can be designed into a special-shaped structure, which can ensure that the touch wiring is disconnected and that there is no light leakage at a wide viewing angle.

[0040] refer to Figure 3 , Figure 3 A schematic diagram of a double-layer touch wiring provided by an embodiment of the present invention; Figure 3 (a) shows a way to implement double-layer touch routing. Figure 3 In (b), another implementation method of double-layer touch wiring is shown. In order to solve the problem of light leakage in the slit 10, in a possible implementation, as shown in FIG. Figure 3 As shown, a touch line can be added above the slit 10 to block light leakage at the slit 10 .

[0041] Furthermore, in order to solve the problem of light leakage from the slit 10 to the greatest extent, a light modulation component can be set in the area where the slit 10 is located. The light modulation component includes a first film layer and a second film layer stacked in a first direction. The refractive index of the first film layer is greater than the refractive index of the second film layer. After the wide-angle light output from the light-emitting element in the display panel enters the light modulation component, it will be totally reflected at the interface between the first film layer and the second film layer and will not be refracted from the interface, so that there will be no light leakage at the slit 10, thereby improving the etching pattern and improving the display effect of the display panel.

[0042] Specifically, refer to Figure 4 , Figure 4 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention; Figure 5 , Figure 5 An embodiment of the present invention provides a Figure 4 Schematic diagram of the cross section of the AA' cutting line; reference Figure 6 , Figure 6 An embodiment of the present invention provides a Figure 4 The display panel 100 provided by the embodiment of the present invention includes: a light modulation component 12 and a touch function layer 13.

[0043] The touch function layer 13 includes a plurality of touch traces 14 ; wherein, at least some of the touch traces 14 are provided with slits 10 .

[0044] The light modulation component 12 is located in the area where the slit 10 is located; the light modulation component 12 includes a first film layer 121 and a second film layer 122 stacked in a first direction X, and the refractive index of the first film layer 121 is greater than the refractive index of the second film layer 122; the first direction X is perpendicular to the plane where the touch function layer 13 is located, and points to the light output side of the display panel 100.

[0045] For example, the refractive index of the first film layer 121 may be in the range of 1.5-1.7, and the refractive index of the second film layer 122 may be in the range of 1.1-1.4.

[0046] Specifically, in the embodiment of the present invention, the light emitting side of the display panel 100 can also be understood as the display side of the display panel 100. Figure 4-Figure 6As shown, a light modulation assembly 12 composed of two layers with different refractive indices is disposed in the region where the slits 10 are located. A first layer 121 and a second layer 122 are stacked in a first direction X, with the refractive index of the first layer 121 being greater than that of the second layer 122. Utilizing the principle that light undergoes total internal reflection when incident from a high-refractive-index medium into a low-refractive-index medium, the wide-angle light emitted by the light-emitting element 15 in the display panel 100 enters the light modulation assembly 12 and is totally reflected at the interface between the first layer 121 and the second layer 122, rather than being refracted out from that interface. This prevents light leakage from the slits 10. Other locations on the touch trace 14 without slits also avoid light leakage due to their own light shielding. This results in a visual effect similar between the slit 10 and the touch trace 14, thereby improving the etched texture and enhancing the display quality of the display panel 100.

[0047] For example, when light with an incident angle of θ strikes the first film layer 121 toward the second film layer 122, the refraction angle is 90°. It is understood that the incident angle θ is the critical angle. Therefore, when θ1 > θ, all light rays are totally reflected. Ignoring the refraction of light rays from the second film layer 122 toward the first film layer 121, the relationship θ2 = θ1 holds. In other words, light rays with θ2 > θ are totally reflected at the interface between the first film layer 121 and the second film layer 122 and are not refracted out of the interface.

[0048] Considering that light emitted by the light-emitting element 15 in the display panel 100 undergoes refraction when traveling from the second film layer 122 to the first film layer 121, and because the refractive index of the first film layer 121 is greater than that of the second film layer 122, the angle of incidence is greater than the angle of refraction, i.e., the relationship θ2 < θ1 exists. Therefore, when θ2 > θ, the relationship θ1 > θ also exists. In other words, light with θ2 > θ is totally reflected at the interface between the first film layer 121 and the second film layer 122 and is not refracted out of the interface.

[0049] In general, the light emitted from the light-emitting element 15 in the display panel 100 from θ2>θ will be totally reflected at the interface between the first film layer 121 and the second film layer 122, and will not be refracted from the interface, solving the problem of light leakage at a large viewing angle at the position of the slit 10, thereby improving the etching pattern and enhancing the display effect of the display panel 100.

[0050] It should be noted that the values of θ1 and θ2 are related to parameters such as the refractive index ratio of the first film layer 121 / the second film layer 122, the width / length ratio of the light modulation component 12, etc., and can be designed according to actual conditions. They are not strictly limited in the embodiments of the present invention.

[0051] It should be noted that the plurality of touch traces 14 are disposed on the touch buffer layer 16 , which provides a planarized buffer structure for the touch traces 14 , thereby improving the stability of the touch traces 14 .

[0052] Optionally, the first film layer 121 and the second film layer 122 are each described using a transparent optical adhesive layer as an example. Exemplarily, the first film layer 121 and the second film layer 122 may be a transparent OC (overcoat) adhesive layer. The material of the transparent OC adhesive layer includes, but is not limited to, polyethyl acrylate, polyurethane, or an acrylic copolymer.

[0053] It should be noted that at least one light emitting element 15 can be understood as constituting a sub-pixel 11. Obviously, multiple light emitting elements 15 can also constitute a sub-pixel 11. In the embodiment of the present application, one light emitting element 15 constituting a sub-pixel 11 is used as an example for description.

[0054] To achieve full-color display of the display panel 100, the light-emitting element 15 may include a red light-emitting element 151 for emitting red light, a green light-emitting element 152 for emitting green light, and a blue light-emitting element 153 for emitting blue light. To improve the display effect of the display panel 100, the light-emitting element 15 may also include a white light-emitting element emitting white light.

[0055] In an optional embodiment of the present invention, reference Figure 7 , Figure 7 A schematic diagram of another display panel structure provided by an embodiment of the present invention; Figure 8 , Figure 8 This is a schematic diagram of the structure of a display function layer provided in an embodiment of the present invention. The display panel 100 provided in this embodiment of the present invention further includes: a display function layer 17; the touch function layer 13 is located on the light-emitting side of the display function layer 17; the display function layer 17 has multiple opening areas K, and light-emitting elements 15; the light-emitting elements 15 are located in the opening areas K.

[0056] Specifically, in an embodiment of the present invention, the display panel 100 includes lines L3 extending along the row direction and lines L4 extending along the column direction. The lines L3 and L4 intersect, and the intersection defines a plurality of sub-pixels 11 arranged in an array. The lines L3 extending along the row direction may include Scan signal lines, Vref signal lines, and DVH signal lines. The lines L4 extending along the column direction may include Data signal lines and PVDD signal lines.

[0057] like Figure 8As shown, the display function layer 17 is located on one side of the substrate 18. The substrate 18 includes but is not limited to a substrate of a flexible insulating material having properties such as stretchability, bendability or curvature. The material includes but is not limited to polyimide material (PI for short) or polycarbonate material (PC for short) or polyethylene terephthalate material (PET for short) and the like.

[0058] like Figure 8 As shown, the display function layer 17 includes, but is not limited to, a first insulating layer 19, a second insulating layer 20, a third insulating layer 21, a fourth insulating layer 22, a passivation layer 23, a planarization layer 24, and a pixel definition layer 25. The pixel definition layer 25 has a plurality of opening regions K forming sub-pixels 11. Taking an organic light-emitting display panel as an example, an anode layer 26, a light-emitting layer 27, and a cathode layer 28 are disposed within the opening regions K forming the sub-pixels 11, thereby forming the light-emitting elements 15 required for the sub-pixels 11.

[0059] like Figure 8 As shown, the display function layer 17 also includes a transistor 29, which forms other functional circuits such as pixel circuits. The transistor 29 includes an active layer 291, a gate 292, a source 293, and a drain 294. The active layer 291 is located on the side of the second insulating layer 20 facing away from the substrate 18, and the gate 292 is located on the side of the third insulating layer 21 facing away from the substrate 18. The source 293 and the drain 294 are located in the same layer and on the side of the fourth insulating layer 22 facing away from the substrate 18. The passivation layer 23 is disposed on the side of the source 293 and the drain 294 facing away from the substrate 18, the planarization layer 24 is disposed on the side of the passivation layer 23 facing away from the substrate 18, and the pixel definition layer 25 is disposed on the side of the planarization layer 24 facing away from the substrate 18.

[0060] In an optional embodiment of the present invention, Figure 5 and Figure 6 As shown, the display panel 100 provided by the embodiment of the present invention further includes: an encapsulation layer 30 located between the display function layer 17 and the touch function layer 13 .

[0061] Specifically, in the embodiment of the present invention, when the touch function layer 13 is formed, the touch function layer 13 is formed on the encapsulation layer 30. Figure 9 , Figure 9 This is a structural diagram of another display panel provided by an embodiment of the present invention, in which different touch electrodes 31 and signal lines 32 are formed by setting the slits 10. The main function of the signal lines 32 is to transmit touch electrical signals, and the main function of the touch electrodes 31 is to serve as touch sensing units to realize touch detection. Figure 4 and Figure 9As shown, the multiple touch lines 14 form a metal grid; part of the metal grid is the touch electrodes 31, and part of the metal grid is the signal line 32, and the signal line 32 is electrically connected to the touch electrode 31; wherein, the touch lines 14 between at least part of the signal lines 32 are provided with the slits 10, and / or, the touch lines 14 between two adjacent touch electrodes 31 are provided with the slits 10.

[0062] In other words, the signal lines 32 are connecting the touch electrodes 31 to the IC. To prevent short circuits between corresponding signal lines 32 between the touch electrodes 31, the slits 10 are provided on at least some of the touch traces 14 between the signal lines 32 to separate the signal lines 32. Since each touch electrode 31 is independent, the slits 10 are provided on the touch traces 14 between two adjacent touch electrodes 31 to separate the touch electrodes 31.

[0063] In addition, in order to avoid the problem of only setting the slits 10 on the edges of the touch electrodes 31 so that the outline of the touch electrodes 31 is visible, the slits 10 can also be set inside the touch electrodes 31. Then, the slits 10 are more evenly arranged, thereby improving the display effect of the display panel 100.

[0064] By disposing a light modulator 12 in the region where the slits 10 are located, this application solves the problem of light leakage at wide viewing angles at the location of the slits 10. This also solves the problem of visible outlines of the touch electrodes 31. Therefore, in this embodiment of the application, it is not necessary to dispose slits 10 within the metal mesh forming the touch electrodes 31. Instead, slits 10 need only be disposed on at least a portion of the touch traces 14 between the signal lines 32, and / or on the touch traces 14 between two adjacent touch electrodes 31. This can significantly reduce the number of slits 10 and the number of newly disposed light modulators 12, thereby simplifying the process and reducing costs.

[0065] The encapsulation layer 30 includes, but is not limited to, a combination of organic and inorganic materials, which are stacked alternately to effectively isolate substances such as water and oxygen. In the embodiment of the present application, the touch function layer 13 is provided with the encapsulation layer 30 as a substrate, eliminating the need for a glass substrate for the touch function layer 13. This reduces the thickness of the entire display panel 100 and facilitates a thinner and lighter design of the display panel 100.

[0066] In an optional embodiment of the present invention, reference Figure 10 , Figure 10A cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention; the display panel 100 provided by the embodiment of the present invention further includes: a polarizer 33 and a cover plate 34 sequentially located on the side of the touch function layer 13 away from the display function layer 17.

[0067] The second film layer 122 is located between the touch function layer 13 and the polarizer 33 .

[0068] Specifically, in the embodiment of the present invention, the cover plate 34 includes, but is not limited to, a glass cover plate, and the polarizer 33 is provided to enhance the display quality of the display panel 100. To enhance the mounting stability of components such as the polarizer 33 and the cover plate 34, a planarized transparent optical adhesive layer, such as a planarized transparent OC adhesive layer, is typically provided on the side of the touch function layer 13 facing away from the display function layer 17.

[0069] Therefore, in the embodiment of the present application, the existing transparent optical adhesive layer of the display panel 100 can be used as the second film layer 122, and the refractive index of the newly added first film layer 121 can be determined based on the refractive index of the transparent optical adhesive layer. By making the refractive index of the newly added first film layer 121 greater than the refractive index of the transparent optical adhesive layer, the design of the light modulation component 12 can be realized.

[0070] In other words, the embodiment of the present application does not require the design of a new second film layer 122 , and the existing transparent optical adhesive layer of the display panel 100 can be used as the second film layer 122 . This reduces costs and is more conducive to a lightweight and thin design of the display panel 100 .

[0071] In an optional embodiment of the present invention, in the first direction X, the orthographic projection of the second film layer 122 completely covers the orthographic projection of the first film layer 121 .

[0072] Specifically, in the embodiment of the present invention, it is assumed that in the first direction X, the orthographic projection of the second film layer 122 does not completely cover the orthographic projection of the first film layer 121. At this time, part of the surface of the first film layer 121 facing away from the display function layer 17 will be exposed. At this time, the exposed surface is not covered by the second film layer 122. The light incident on the light modulation component 12 will be emitted from this exposed surface, and there will still be a problem of light leakage at a large viewing angle at the slit 10.

[0073] Therefore, in the embodiment of the present application, in the first direction X, the orthographic projection of the second film layer 122 completely covers the orthographic projection of the first film layer 121; in other words, in the first direction X, the orthographic projection of the second film layer 122 completely covers the orthographic projection of the slit 10, thereby ensuring to the greatest extent that there will be no problem of light leakage at a large viewing angle at the slit 10.

[0074] In an optional embodiment of the present invention, reference Figure 11 , Figure 11 A cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention; in the display panel 100 provided by an embodiment of the present invention, the distance between the surface of the first film layer 121 facing away from the display function layer 17 and the plane where the display function layer 17 is located is H1.

[0075] The distance between the surface of the touch trace 14 facing away from the display function layer 17 and the plane where the display function layer 17 is located is H2.

[0076] Among them, H1≥H2.

[0077] Specifically, in the embodiment of the present invention, under the relationship H1>H2, it can be said that the thickness of the first film layer 121 is relatively thick, and the height of the first film layer 121 will be at least greater than the depth of the position of the slit 10, so that the interface between the first film layer 121 and the second film layer 122 is raised, so that more light emitted from the light-emitting element 15 in the display panel 100 at a wide viewing angle can be incident into the first film layer 121, thereby ensuring to the greatest extent that there will be no problem of light leakage at a wide viewing angle at the slit 10.

[0078] In an optional embodiment of the present invention, reference Figure 12 , Figure 12 This is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention; the light modulation component 12 in the display panel 100 provided by the embodiment of the present invention further includes: a third film layer 123 located on the side of the first film layer 121 away from the second film layer 122.

[0079] The refractive index of the first film layer 121 is greater than the refractive index of the third film layer 123 .

[0080] For example, the refractive index of the third film layer 123 may be in the range of 1.1-1.4.

[0081] Specifically, in the embodiment of the present invention, since the second film layer 122 is located on the side of the first film layer 121 away from the display function layer 17, that is, the interface between the first film layer 121 and the second film layer 122 is also located on the side of the first film layer 121 away from the display function layer 17, the light incident on the light modulation component 12 is totally reflected by the interface and will be transmitted toward the backlight side of the display panel 100.

[0082] In order to prevent this part of light from being emitted from the surface of the first film layer 121 facing the display function layer 17 and affecting the display effect of the display panel 100, in the embodiment of the present invention, a third film layer 123 is provided on the side of the first film layer 121 away from the second film layer 122, and the refractive index of the first film layer 121 is greater than the refractive index of the third film layer 123. As a result, the light incident on the interface between the first film layer 121 and the third film layer 123 is totally reflected again, preventing it from continuing to be transmitted toward the backlight side of the display panel 100, thereby improving the display effect of the display panel 100.

[0083] It should be noted that the refractive indexes of the third film layer 123 and the second film layer 122 may be the same or different. For example, the refractive index of the first film layer 121 is M1, the refractive index of the second film layer 122 is M2, and the refractive index of the third film layer 123 is M3. The relationship M1>M2, M1>M3, and M2≠M3 exists; or the relationship M1>M2, M1>M3, and M2=M3 exists.

[0084] It should be further explained that the materials of the third film layer 123 and the second film layer 122 may be the same or different, and this is not strictly limited in the embodiment of the present invention.

[0085] In an optional embodiment of the present invention, in the first direction X, the orthographic projection of the third film layer 123 completely covers the orthographic projection of the first film layer 121 .

[0086] Specifically, in the embodiment of the present invention, it is assumed that in the first direction X, the orthographic projection of the third film layer 123 does not completely cover the orthographic projection of the first film layer 121. At this time, part of the surface of the first film layer 121 facing the display function layer 17 will be exposed. At this time, the exposed surface is not covered by the third film layer 123. The light that is totally reflected by the interface between the first film layer 121 and the second film layer 122 and transmitted toward the backlight side of the display panel 100 will be emitted from this exposed surface, which will still affect the display effect of the display panel 100.

[0087] Therefore, in the embodiment of the present application, in the first direction X, the orthographic projection of the third film layer 123 completely covers the orthographic projection of the first film layer 121, thereby ensuring to the greatest extent that the light totally reflected by the interface between the first film layer 121 and the second film layer 122 cannot continue to be transmitted toward the backlight side of the display panel 100, thereby maximizing the display effect of the display panel 100.

[0088] In an optional embodiment of the present invention, reference Figure 13 , Figure 13 A cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention; Figure 14 , Figure 14 This is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention; the light modulation component 12 in the display panel 100 provided by the embodiment of the present invention further includes: a fourth film layer 124, and the fourth film layer 124 covers the side wall of the first film layer 121.

[0089] The refractive index of the first film layer 121 is greater than the refractive index of the fourth film layer 124 .

[0090] For example, the refractive index of the fourth film layer 124 may be in the range of 1.1-1.4.

[0091] Specifically, in the embodiment of the present invention, Figure 13 As shown, since the second film layer 122 is located on the side of the first film layer 121 away from the display function layer 17, that is, the interface between the first film layer 121 and the second film layer 122 is also located on the side of the first film layer 121 away from the display function layer 17, the light incident on the light modulation component 12 will be totally reflected by the interface and will be transmitted toward the backlight side of the display panel 100. Obviously, some light will also be incident on the side wall position of the first film layer 121.

[0092] In order to prevent this part of light from being emitted from the sidewalls of the first film layer 121 and affecting the display effect of the display panel 100, in the embodiment of the present invention, a fourth film layer 124 is disposed at the sidewalls of the first film layer 121, and the refractive index of the first film layer 121 is greater than the refractive index of the fourth film layer 124. This causes light incident on the interface between the first film layer 121 and the fourth film layer 124 to be totally reflected again, preventing it from being emitted from the sidewalls of the first film layer 121, thereby improving the display effect of the display panel 100.

[0093] It should be noted that the refractive indexes of the fourth film layer 124 and the second film layer 122 may be the same or different. For example, the refractive index of the first film layer 121 is M1, the refractive index of the second film layer 122 is M2, and the refractive index of the fourth film layer 124 is M4. The relationship M1>M2, M1>M4, and M2≠M4 exists; or the relationship M1>M2, M1>M4, and M2=M4 exists.

[0094] It should be further explained that the materials of the fourth film layer 124 and the second film layer 122 may be the same or different, and this is not strictly limited in the embodiment of the present invention.

[0095] like Figure 14As shown, since the second film layer 122 is located on the side of the first film layer 121 facing away from the display function layer 17, that is, the interface between the first film layer 121 and the second film layer 122 is also located on the side of the first film layer 121 facing away from the display function layer 17, light incident on the light modulation component 12 is totally reflected by this interface and then transmitted toward the backlight side of the display panel 100. Since the third film layer 123 is located on the side of the first film layer 121 facing the display function layer 17, that is, the interface between the first film layer 121 and the third film layer 123 is also located on the side of the first film layer 121 facing the display function layer 17, light incident on the light modulation component 12 is totally reflected by this interface and then transmitted toward the light output side of the display panel 100. Obviously, some light will also be incident on the sidewall of the first film layer 121.

[0096] In order to prevent this part of light from being emitted from the sidewalls of the first film layer 121 and affecting the display effect of the display panel 100, in the embodiment of the present invention, a fourth film layer 124 is disposed at the sidewalls of the first film layer 121, and the refractive index of the first film layer 121 is greater than the refractive index of the fourth film layer 124. This causes light incident on the interface between the first film layer 121 and the fourth film layer 124 to be totally reflected again, preventing it from being emitted from the sidewalls of the first film layer 121, thereby improving the display effect of the display panel 100.

[0097] like Figure 14 As shown, based on the design of the first film layer 121, the second film layer 122, the third film layer 123 and the fourth film layer 124, the light incident on the light modulation component 12 will propagate inside it and will no longer be emitted from any angle, thereby solving the problem of light leakage at a large viewing angle of the slit 10 to the greatest extent and maximizing the display effect of the display panel 100.

[0098] It should be noted that the refractive indices of the fourth film layer 124, the third film layer 123, and the second film layer 122 may be the same or different. For example, the refractive index of the first film layer 121 is M1, the refractive index of the second film layer 122 is M2, the refractive index of the third film layer 123 is M3, and the refractive index of the fourth film layer 124 is M4. The relationship M1>M2, M1>M3, M1>M4, and M2≠M3≠M4 exists; or the relationship M1>M2, M1>M3, M1>M4, and M2=M3≠M4 exists; or the relationship M1>M2, M1>M3, M1>M4, and M2≠M3=M4 exists; or the relationship M1>M2, M1>M3, M1>M4, and M2≠M3=M4 exists; or the relationship M1>M2, M1>M3, M1>M4, and M2=M3=M4 exists.

[0099] It should be further explained that the materials of the fourth film layer 124 , the third film layer 123 and the second film layer 122 may be the same or different, and are not strictly limited in the embodiment of the present invention.

[0100] based on Figure 14 The structure shown in FIG. 1 is further described below with respect to its preparation method.

[0101] The following description is made by taking the second film layer 122, the third film layer 123 and the fourth film layer 124 as an example, wherein the materials are the same. Figure 15 , Figure 15 One of the partial structural diagrams corresponding to a method of preparing a display panel provided in an embodiment of the present invention; Figure 16 , Figure 16 The second schematic diagram of the partial structure of a display panel provided by an embodiment of the present invention; Figure 17 , Figure 17 The third schematic diagram of the partial structure of a display panel provided by an embodiment of the present invention; Figure 18 , Figure 18 A fourth schematic diagram of a partial structure corresponding to a method of preparing a display panel according to an embodiment of the present invention; Figure 19 , Figure 19 This is a fifth partial structural diagram corresponding to a method of preparing a display panel provided by an embodiment of the present invention.

[0102] The first step, such as Figure 15 As shown, the touch trace 14 is etched to form a slit 10 .

[0103] The second step is Figure 16 As shown, the touch buffer layer 16 is further etched based on the slits 10 to form grooves 35 .

[0104] The third step, such as Figure 17 As shown, a first transparent optical adhesive layer 36 is deposited on the entire surface and then patterned, leaving only the first transparent optical adhesive layer 36 on the bottom and sidewalls of the groove 35 .

[0105] The fourth step is as follows Figure 18 As shown, a second transparent optical adhesive layer 38 is deposited on the entire surface and then patterned to retain only the second transparent optical adhesive layer 38 in the groove 37 of the first transparent optical adhesive layer 36 ; wherein the refractive index of the second transparent optical adhesive layer 38 is greater than that of the first transparent optical adhesive layer 36 .

[0106] Step 5: Figure 19 As shown, the first transparent optical adhesive layer 36 is deposited on the entire surface, thereby achieving full coverage of the second transparent optical adhesive layer 38 by the first transparent optical adhesive layer 36. The light incident on the light modulation component 12 will propagate inside it and will no longer be emitted from any angle, thereby solving the problem of light leakage at a large viewing angle of the slit 10 to the greatest extent and maximizing the display effect of the display panel 100.

[0107] In an optional embodiment of the present invention, reference Figure 20 , Figure 20 This is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention. The opening area K in the display panel 100 provided by the embodiment of the present invention includes a target opening area disposed adjacent to the slit 10 .

[0108] The distance between the surface of the first film layer 121 facing the target opening area and the target opening area is greater than or equal to 5 μm, that is, the relationship P1 ≥ 5 μm exists.

[0109] Specifically, in the embodiment of the present invention, the width of the light modulation component 12 is equal to the width of the slit 10, but its length can be larger than the width of the touch line 14, extending as much as possible to the target opening area, preferably close to the target opening area, so that more light emitted from the light-emitting element 15 in the display panel 100 at a wide viewing angle can be incident on the first film layer 121, thereby ensuring to the greatest extent that there will be no problem of wide-viewing angle light leakage at the slit 10.

[0110] Taking into further consideration issues such as process limitations, such as mask accuracy, the distance between the surface of the first film layer 121 facing the target opening area and the target opening area is greater than or equal to 5 μm, thereby reducing the process difficulty of preparing the display panel 100 while ensuring to the greatest extent that there will be no large-viewing angle light leakage problem at the slit 10.

[0111] In an optional embodiment of the present invention, reference Figure 21 , Figure 21 A schematic diagram of the structure of another display panel provided in an embodiment of the present invention. In the display panel 100 provided in an embodiment of the present invention, the opening area K includes a first opening area K1 and a second opening area K2; the slits 10 are disposed on a portion of the touch traces 14 between the first opening area K1 and the second opening area K2; and the slits 10 include at least one target slit 101.

[0112] The optical modulation component 12 in the target slit 101 includes a first optical modulation component 12A and a second optical modulation component 12B; the first optical modulation component 12A is disposed near the first opening area K1, and the second optical modulation component 12B is disposed near the second opening area K2.

[0113] The first light modulation component 12A includes a first surface facing the first opening area K1 , and the second light modulation component 12B includes a second surface facing the second opening area K2 .

[0114] The touch trace 14 on one side of the target slit 101 includes a first extension portion 141 and a second extension portion 142 connected in sequence. The first extension portion 141 extends toward the first opening area K1 , and the second extension portion 142 covers a portion of the first surface.

[0115] The touch trace 14 on the other side of the target slit 101 includes a third extension portion 143 and a fourth extension portion 144 connected in sequence. The third extension portion 143 extends toward the second opening area K2 , and the fourth extension portion 144 covers a portion of the second surface.

[0116] The length of the second extension portion 142 is G1, the length of the fourth extension portion 144 is G2, and the width of the target slit 101 is G; wherein G1+G2≥G.

[0117] Specifically, in an embodiment of the present invention, two independent first optical modulation components 12A and second optical modulation components 12B are set in the area where the target slit 101 is located. The first optical modulation component 12A is used to receive the wide-angle light emitted by the light-emitting element 15 in the first opening area K1, and the second optical modulation component 12B is used to receive the wide-angle light emitted by the light-emitting element 15 in the second opening area K2, thereby forming two independent light paths.

[0118] In addition, the touch traces 14 on both sides of the target slit 101 are extended to form "L"-shaped extensions, namely, the "L"-shaped extensions composed of the first extension 141 and the second extension 142, and the "L"-shaped extensions composed of the third extension 143 and the fourth extension 144. When G1+G2≥G, the wide-angle light emitted by the light-emitting element 15 in the first opening area K1 can only enter the first light modulation component 12A, and the wide-angle light emitted by the light-emitting element 15 in the second opening area K2 can only enter the second light modulation component 12B, thereby avoiding the problem of light crosstalk between the light-emitting elements 15 in different opening areas K, and playing the role of blocking the light path between the sub-pixels 11, thereby improving the display effect of the display panel 100.

[0119] Optionally, the surface exposed by the first surface is the surface of the first film layer 121 in the first light modulator 12A, and / or the surface exposed by the second surface is the surface of the first film layer 121 in the second light modulator 12B. In other words, the wide-angle light emitted by the light-emitting element 15 in the first opening region K1 directly enters the first film layer 121 of the first light modulator 12A, and the wide-angle light emitted by the light-emitting element 15 in the second opening region K2 directly enters the first film layer 121 of the second light modulator 12B. This solves the problem of light interference from other film layer interfaces and ensures that the wide-angle light emitted by the light-emitting element 15 in the opening region K enters the corresponding light modulator 12 as completely as possible.

[0120] Optionally, the first light modulation component 12A and the second light modulation component 12B share the second film layer 122 , thereby simplifying the difficulty of patterning the second film layer 122 and reducing the process difficulty.

[0121] In an optional embodiment of the present invention, reference Figure 22 , Figure 22 This is a schematic structural diagram of another display panel provided by an embodiment of the present invention. In the display panel 100 provided by an embodiment of the present invention, the surface of the first film layer 121 facing the second film layer 122 is a curved surface.

[0122] The curved surface is convex toward a side away from the touch function layer 13 .

[0123] Specifically, in the embodiment of the present invention, the light modulation component 12 is an arc-shaped light modulation component 12, such as Figure 22 As shown, the light on the left passes through the light modulation component 12 and is emitted from the lower right, and the light on the right passes through the light modulation component 12 and is emitted from the lower left, ensuring that there will be no light leakage at the slit 10 at a large viewing angle.

[0124] Moreover, the arc-shaped design of the light modulation component 12 can enlarge the interface between the first film layer 121 and the second film layer 122, as well as the interface between the third film layer 123 and the first film layer 121, so as to maximize the total reflection of light incident on the light modulation component 12 at as many angles as possible, thereby ensuring to the greatest extent that there will be no problem of light leakage at a large viewing angle at the slit 10.

[0125] Based on the above embodiments of the present invention, correspondingly, the embodiments of the present application further provide a display device, referring to Figure 23 , Figure 23This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. The display device 200 includes the display panel 100 described in the above embodiment of the present application. The display device 200 can be any display device with a display function, such as a touch screen display, a mobile phone, a tablet computer, a laptop computer, an e-reader, or a television.

[0126] The above is a detailed introduction to a display panel and a display device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of the present invention, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

[0127] It should be noted that each embodiment in this specification focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0128] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that the process, method, article, or apparatus comprising a series of elements inherent to the elements, or also including elements inherent to these processes, methods, articles, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0129] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: The display panel includes: a light modulation component and a touch function layer; The touch function layer includes a plurality of touch traces; wherein at least some of the touch traces are provided with slits; The light modulation component is located in the area where the slit is located; the light modulation component includes a first film layer and a second film layer stacked in a first direction, and the refractive index of the first film layer is greater than the refractive index of the second film layer; the first direction is perpendicular to the plane where the touch function layer is located and points to the light output side of the display panel.

2. The display panel according to claim 1, wherein: The display panel further includes: a display function layer; the touch function layer is located on the light-emitting side of the display function layer; The display function layer has a plurality of opening areas and a light-emitting element; The light emitting element is located in the opening area.

3. The display panel according to claim 2, wherein: The display panel further includes: an encapsulation layer located between the display function layer and the touch function layer.

4. The display panel according to claim 2, wherein: The display panel further includes: a polarizer and a cover plate sequentially located on a side of the touch function layer away from the display function layer; The second film layer is located between the touch function layer and the polarizer.

5. The display panel according to claim 1, wherein: The first film layer and the second film layer are transparent optical adhesive layers respectively.

6. The display panel according to claim 5, wherein: The material of the transparent optical adhesive layer is polyethyl acrylate, polyurethane or acrylic copolymer.

7. The display panel according to claim 1, wherein: In the first direction, the orthographic projection of the second film layer completely covers the orthographic projection of the first film layer.

8. The display panel according to claim 2, wherein: The distance between the surface of the first film layer facing away from the display functional layer and the plane where the display functional layer is located is H1; The distance between the surface of the touch wiring facing away from the display function layer and the plane where the display function layer is located is H2; Among them, H1≥H2.

9. The display panel according to claim 1, wherein: The light modulation component further includes: a third film layer located on a side of the first film layer away from the second film layer; The refractive index of the first film layer is greater than the refractive index of the third film layer.

10. The display panel according to claim 9, wherein: In the first direction, the orthographic projection of the third film layer completely covers the orthographic projection of the first film layer.

11. The display panel according to claim 1 or 9, wherein: The light modulation component further includes: a fourth film layer, the fourth film layer covering the sidewall of the first film layer; The refractive index of the first film layer is greater than the refractive index of the fourth film layer.

12. The display panel according to claim 2, wherein: The opening area includes a target opening area disposed adjacent to the slit; A distance between a surface of the first film layer facing the target opening area and the target opening area is greater than or equal to 5 μm.

13. The display panel according to claim 2, wherein: The opening area includes a first opening area and a second opening area; the slits are provided on a portion of the touch trace between the first opening area and the second opening area; the slits include at least one target slit; The light modulation component in the target slit includes a first light modulation component and a second light modulation component; the first light modulation component is disposed near the first opening area, and the second light modulation component is disposed near the second opening area; The first light modulation component includes a first surface facing the first opening area, and the second light modulation component includes a second surface facing the second opening area; The touch trace on one side of the target slit position includes a first extension portion and a second extension portion connected in sequence, the first extension portion extends in a direction close to the first opening area, and the second extension portion covers a portion of the first surface; The touch trace on the other side of the target slit position includes a third extension portion and a fourth extension portion connected in sequence, the third extension portion extends in a direction close to the second opening area, and the fourth extension portion covers a portion of the second surface; The length of the second extension portion is G1, the length of the fourth extension portion is G2, and the width of the target slit is G; wherein G1+G2≥G.

14. The display panel according to claim 13, wherein: The surface exposed by the first surface is the surface of the first film layer in the first light modulation component, and / or the surface exposed by the second surface is the surface of the first film layer in the second light modulation component.

15. The display panel according to claim 13, wherein: The first light modulation component and the second light modulation component share the second film layer.

16. The display panel according to claim 1, wherein The surface of the first film layer facing the second film layer is a curved surface; The curved surface is convex toward a side away from the touch function layer.

17. The display panel according to claim 1, wherein: The plurality of touch lines form a metal grid; part of the metal grid is a touch electrode, and part of the metal grid is a signal line, and the signal line is electrically connected to the touch electrode; The slits are provided on at least a portion of the touch lines between the signal lines, and / or the slits are provided on the touch lines between two adjacent touch electrodes.

18. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 17.

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