Display panel, display device and preparation method of display panel

Abstract

The embodiment of the invention discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, a light-emitting functional layer, a touch functional layer and a color film layer, a pixel definition layer of the light-emitting functional layer is provided with a first opening in a sub-pixel; a black matrix layer of the color film layer is provided with a second opening in a sub-pixel, and the orthographic projection of the second opening on the substrate is overlapped with the orthographic projection of the filter layer on the substrate; in one sub-pixel, the second touch metal layer of the touch function layer comprises N metal parts, N is larger than or equal to 1, the nth metal part is located on the nth side of the first opening, n belongs to [1, N] and comprises a first part and a second part, the included angle between the second part and the plane parallel to the substrate is an acute angle, and the included angle between the first part and the plane parallel to the substrate is larger than or equal to 1. The orthographic projection of the metal part on the substrate is partially overlapped with the orthographic projection of the first opening on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more specifically, to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Currently, the display panel in the related art has the problem that it is unable to control the light emission angle in one direction. Summary of the invention

[0003] The purpose of the present disclosure is to provide a display panel, a display device and a method for manufacturing a display panel to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] According to a first aspect of the present disclosure, a display panel is provided, comprising a substrate, a light-emitting function layer, an encapsulation layer, a touch function layer and a color filter layer which are sequentially stacked, wherein the display panel comprises sub-pixels arranged in an array; the light-emitting function layer comprises a pixel definition layer and a light-emitting layer, wherein the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening; the color filter layer comprises a filter layer and a black matrix layer, wherein the black matrix layer has a second opening located in the sub-pixel, the filter layer is located in the sub-pixel, and an orthographic projection of the second opening on the substrate overlaps with an orthographic projection of the filter layer on the substrate; the touch function layer comprises a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are sequentially stacked, wherein the first touch metal layer comprises a first touch metal trace, and the second touch The touch control metal layer includes a second touch metal routing; wherein, in a sub-pixel, the second touch control metal layer also includes N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part includes a first part extending along a first direction and a second part extending along a second direction, the first direction is the direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

[0006] Optionally, the touch insulating layer includes an insulating layer pattern, and the metal portion is formed at an edge of the insulating layer pattern so that the metal portion includes the first portion and the second portion.

[0007] Optionally, the black matrix layer is arranged on a side of the filter layer away from the substrate.

[0008] Optionally, the second touch metal wiring is connected to the metal portion.

[0009] Optionally, a first distance is set between an orthographic projection of an edge of the nth side of the first opening on the substrate and an orthographic projection of an edge of the nth metal portion on the substrate;

[0010] A second distance is provided between an orthographic projection of an edge of the nth side of the first opening on the substrate and an orthographic projection of an edge of the nth side of the second opening on the substrate;

[0011] The second interval is greater than the first interval.

[0012] Optionally, the first spacing has a value range of 0 μm to 4 μm.

[0013] Optionally, a value range of the second spacing is 2 μm to 6 μm.

[0014] Optionally, the acute angle ranges from 35° to 85°.

[0015] A second aspect of the present disclosure provides a display device, comprising the display panel.

[0016] A third aspect of the present disclosure provides a method for manufacturing a display panel, wherein the display panel comprises sub-pixels arranged in an array. The manufacturing method comprises:

[0017] providing a substrate;

[0018] forming a light-emitting functional layer on the substrate, wherein the light-emitting functional layer comprises a pixel definition layer and a light-emitting layer, wherein the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening;

[0019] forming an encapsulation layer on the light-emitting functional layer;

[0020] A touch function layer is formed on the encapsulation layer, the touch function layer comprising a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are sequentially stacked, the first touch metal layer comprising a first touch metal trace, and the second touch metal layer comprising a second touch metal trace; wherein, in a sub-pixel, the second touch metal layer further comprises N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part comprises a first part extending along a first direction and a second part extending along a second direction, the first direction is a direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, and the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate;

[0021] A color filter layer is formed on the touch function layer, the color filter layer includes a filter layer and a black matrix layer, the black matrix layer has a second opening located in the sub-pixel, the filter layer is located in the sub-pixel, the orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the filter layer on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

[0022] Optionally, forming the touch insulating layer includes: forming an insulating layer pattern;

[0023] Forming the metal portion includes forming the metal portion at an edge of the insulating layer pattern such that the metal portion includes the first portion and the second portion.

[0024] The beneficial effects of the present disclosure are as follows:

[0025] The technical solution disclosed in the present invention can effectively reduce the thickness of the display panel by setting a metal part on the second touch metal layer, compared with the related art that controls the light output of the display panel by laminating a film material for controlling the light path; in addition, by setting the metal part to include a first part extending along the first direction and a second part extending along the second direction, the light emitted from the light-emitting layer in the sub-pixel to the first part is blocked by the first part during transmission, and the light emitted from the light-emitting layer in the sub-pixel to the second part is reflected by the second part during transmission, which can effectively reduce the light output of the light-emitting layer at a large angle on one side, thereby realizing flexible control of the viewing angle of the display panel; in addition, by setting the metal part to include a second part extending along the second direction, the light emitted from the light-emitting layer in the sub-pixel to the second part is reflected by the second part during transmission, which can effectively increase the light output on the opposite side; finally, by setting the orthographic projection of the edge of the nth side of the second opening on the substrate to be between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate, the stray light reflected from the second part can be effectively eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.

[0027] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present disclosure is shown.

[0028] Figures 2 to 7 Schematic diagrams showing the structures of display panels provided by different embodiments of the present disclosure.

[0029] Figure 8 A schematic diagram showing color separation in which the second pitch of the display panel provided by the embodiment of the present disclosure is 1 μm larger than the first pitch.

[0030] Fig. 9 A schematic diagram showing color separation in which the second spacing of the display panel provided by an embodiment of the present disclosure is equal to the first spacing.

[0031] Fig.10 A schematic diagram showing color separation in which the second pitch of the display panel provided by the embodiment of the present disclosure is 1 μm smaller than the first pitch.

[0032] Fig.11 A schematic top view showing a display panel provided by an embodiment of the present disclosure in which a black matrix layer fully covers a pixel definition layer.

[0033] Fig.12 A schematic top view showing a display panel provided by an embodiment of the present disclosure in which a black matrix layer partially covers a pixel definition layer. DETAILED DESCRIPTION

[0034] The terms “on”, “formed on” and “disposed on” in the present disclosure may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0035] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0036] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0037] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.

[0038] Currently, the display panel in the related art has the problem that it is unable to control the light emission angle in one direction.

[0039] In related technologies, with the popularity of organic light emitting diode (OLED) display products, more usage scenarios require the control of the display's light output angle. For example, in-vehicle displays need to control the display's light output angle to protect the driver from interference; for example, mobile phones, laptops (NoteBook, NB) and tablets (PAD) need to control the light output angle to protect personal privacy information, etc.

[0040] In view of this, an embodiment of the present disclosure provides a display panel, including a substrate, a light-emitting function layer, an encapsulation layer, a touch function layer and a color filter layer which are stacked in sequence, the display panel including sub-pixels arranged in an array; the light-emitting function layer includes a pixel definition layer and a light-emitting layer, the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening; the color filter layer includes a filter layer and a black matrix layer, the black matrix layer has a second opening located in the sub-pixel, the filter layer is located in the sub-pixel, and the orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the filter layer on the substrate; the touch function layer includes a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are stacked in sequence, the first touch metal layer includes a first touch metal trace, the The second touch metal layer includes a second touch metal routing; wherein, in a sub-pixel, the second touch metal layer also includes N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part includes a first part extending along a first direction and a second part extending along a second direction, the first direction is a direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

[0041] In a specific example, Figure 1 As shown, the display panel includes a substrate 10, a light-emitting functional layer 20, an encapsulation layer 30, a touch function layer 40 and a color filter layer 50 which are stacked in sequence. Further, the light-emitting functional layer 20 includes a pixel definition layer 21, an anode 22, a light-emitting layer 23 and a cathode 24. The pixel definition layer 21 has a first opening 25 located in a sub-pixel, and the light-emitting layer 23 is located in the first opening 25. Further, the encapsulation layer 30 includes a first inorganic encapsulation layer 31, an organic encapsulation layer 32 and a second inorganic encapsulation layer 33. Further, the color filter layer 50 includes a filter layer 51 and a black matrix layer 52, the black matrix layer 52 has a second opening 53 located in a sub-pixel, the filter layer 51 is located in the sub-pixel, and the orthographic projection of the second opening 53 on the substrate 10 overlaps with the orthographic projection of the filter layer 51 on the substrate 10. Further, the touch function layer 40 includes a first touch metal layer 41, a touch insulating layer 42, a second touch metal layer 43 and a touch protection layer 44 which are stacked in sequence. Furthermore, the first touch metal layer 41 also includes a first touch metal electrode.

[0042] In a specific example, Figure 1 As shown, in a sub-pixel, the second touch metal layer 43 further includes a metal portion 45, the metal portion 45 is on the left side of the first opening 25, and the metal portion 45 includes a first portion 46 extending along the first direction X and a second portion 47 extending along the second direction Y. Further, the first direction X is the direction in which the metal portion 45 points to the first opening 25 in the first plane, and the first plane is a plane parallel to the substrate 10. Further, in the first plane, the second portion 47 is closer to the center of the first opening 25 than the first portion 46. Further, the angle 48 between the second portion 47 and the first plane is an acute angle.

[0043] In a specific example, Figure 1 As shown, the orthographic projection of the edge of the metal portion 45 close to the first opening 25 on the substrate 10 is located between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10 .

[0044] In a specific example, Figure 1 As shown, the orthographic projection of the left edge of the second opening 53 on the substrate 10 is located between the orthographic projection of the edge of the metal portion 45 on the substrate 10 and the orthographic projection of the center 26 of the first opening 25 on the substrate 10 .

[0045] In a specific example, Figure 1 As shown, the second part 47 of the metal part 45 changes the light path 491, and the first part 46 blocks the light path 490, which can reduce the light output of the light-emitting layer 23 at a large angle on the left side. Further, the first part 46 and the black matrix layer 52 can block the light output on the left side of the sub-pixel, so that the left viewing angle display control is invisible, and the second part 47 reflects the light emitted from the left side of the sub-pixel, increasing the light output on the right side, thereby controlling the viewing angle of the display. Further, the black matrix layer 52 blocks the metal part 45, eliminating the color separation stray light that appears when the metal part 45 reflects the light.

[0046] In this embodiment, a metal part is arranged on the second touch metal layer. Compared with the related art that controls the light output of the display panel by bonding a film material for controlling the light path, the thickness of the display panel can be effectively reduced. In addition, the metal part includes a first part extending along a first direction and a second part extending along a second direction, so that the light emitted from the light-emitting layer in the sub-pixel to the first part is blocked by the first part during transmission, and the light emitted from the light-emitting layer in the sub-pixel to the second part is reflected by the second part during transmission, which can effectively reduce the light output of the light-emitting layer at a large angle on one side, thereby realizing flexible control of the viewing angle of the display panel. At the same time, by arranging the orthographic projection of the edge of the nth side of the second opening on the substrate to be located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate, the stray light reflected from the second part can be effectively eliminated.

[0047] In a possible implementation manner, the black matrix layer is disposed on a side of the filter layer away from the substrate.

[0048] In a specific example, Figures 2 to 7 As shown, the filter layer is arranged on the side of the touch function layer 40 away from the substrate 10, and the filter layer includes a first color filter 54, a second color filter 55 and a third color filter 56, and the first color, the second color and the third color are respectively one of red, green and blue; the black matrix layer 52 is arranged on the side of the filter layer away from the substrate 10.

[0049] In this embodiment, the black matrix layer is arranged on the side of the filter layer away from the substrate, thereby increasing the distance between the black matrix layer and the light-emitting layer, enhancing the ability to block the light output effect, and improving the control effect of the light output angle.

[0050] In a specific example, Figure 2 and Figure 5 As shown, in a sub-pixel, the second touch metal layer 43 further includes a metal portion 45, the metal portion 45 is on the left side of the first opening 25, and the metal portion 45 includes a first portion 46 extending along the first direction X and a second portion 47 extending along the second direction Y. Further, the first direction X is the direction in which the metal portion 45 points to the first opening 25 in the first plane, and the first plane is a plane parallel to the substrate 10. Further, in the first plane, the second portion 47 is closer to the center of the first opening 25 than the first portion 46. Further, the angle 48 between the second portion 47 and the first plane is an acute angle.

[0051] In a specific example, Figure 2 and Figure 5 As shown, the orthographic projection of the edge of the metal portion 45 close to the first opening 25 on the substrate 10 is located between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10 .

[0052] In a specific example, Figure 2 and Figure 5 As shown, the orthographic projection of the left edge of the second opening 53 on the substrate 10 is located between the orthographic projection of the edge of the metal portion 45 on the substrate 10 and the orthographic projection of the center 26 of the first opening 25 on the substrate 10 .

[0053] In a specific example, Figure 2 and Figure 5As shown, the second part 47 of the metal part 45 changes the light path 491, and the first part 46 blocks the light path 490, which can reduce the light output of the light-emitting layer 23 at a large angle on the left side. Further, the first part 46 and the black matrix layer 52 can block the light output on the left side of the sub-pixel, so that the left viewing angle display control is invisible, and the second part 47 reflects the light emitted from the left side of the sub-pixel, increasing the light output on the right side, thereby controlling the viewing angle of the display. Further, the black matrix layer 52 blocks the metal part 45, eliminating the color separation stray light that appears when the metal part 45 reflects the light.

[0054] In a specific example, Figure 3 and Figure 6 As shown, in a sub-pixel, the second touch metal layer 43 further includes a metal portion 45, the metal portion 45 is on the right side of the first opening 25, and the metal portion 45 includes a first portion 461 extending along the first direction X and a second portion 471 extending along the second direction Y. Further, the first direction X is the direction in which the metal portion 45 points to the first opening 25 in the first plane, and the first plane is a plane parallel to the substrate 10. Further, in the first plane, the second portion 471 is closer to the center of the first opening 25 than the first portion 461. Further, the angle 481 between the second portion 471 and the first plane is an acute angle.

[0055] In a specific example, Figure 3 and Figure 6 As shown, the orthographic projection of the edge of the metal portion 45 close to the first opening 25 on the substrate 10 is located between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the right edge of the second opening 53 on the substrate 10 .

[0056] In a specific example, Figure 3 and Figure 6 As shown, the orthographic projection of the right edge of the second opening 53 on the substrate 10 is located between the orthographic projection of the edge of the metal portion 45 on the substrate 10 and the orthographic projection of the center 26 of the first opening 25 on the substrate 10 .

[0057] In a specific example, Figure 3 and Figure 6 As shown, the second part 471 of the metal part 45 changes the light path 4911, and the first part 461 blocks the light path 4901, which can reduce the light output of the light-emitting layer 23 at a large angle on the right side. Further, the first part 461 and the black matrix layer 52 can block the light output on the right side of the sub-pixel, so that the right viewing angle display control is invisible, and the second part 471 reflects the light emitted from the right side of the sub-pixel, increasing the light output on the left side, thereby controlling the viewing angle of the display. Further, the black matrix layer 52 blocks the metal part 45, eliminating the color separation stray light that appears when the metal part 45 reflects the light.

[0058] In a specific example, Figure 4 and Figure 7 As shown, in a sub-pixel, the second touch metal layer 43 further includes a metal portion 45, and the metal portion 45 is on the left and right sides of the first opening 25. The metal portion 45 on the left side of the first opening 25 includes a first portion 462 extending along the first direction X and a second portion 472 extending along the second direction Y, and the metal portion 45 on the right side of the first opening 25 includes a first portion 463 extending along the first direction X and a second portion 473 extending along the second direction Y. Further, the first direction X is the direction in which the metal portion 45 points to the first opening 25 in the first plane, and the first plane is a plane parallel to the substrate 10. Further, in the first plane, the second portion 472 of the metal portion 45 on the left side of the first opening 25 is closer to the center of the first opening 25 than the first portion 462, and the second portion 473 of the metal portion 45 on the right side of the first opening 25 is closer to the center of the first opening 25 than the first portion 463. Further, the angle 482 between the second portion 472 and the first plane is an acute angle, and the angle 483 between the second portion 473 and the first plane is an acute angle.

[0059] In a specific example, Figure 4 and Figure 7 As shown, the orthographic projection of the edge of the metal portion 45 on the left side of the first opening 25 close to the first opening 25 on the substrate 10 is located between the orthographic projection of the edge of the left side of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the left side of the second opening 53 on the substrate 10; the orthographic projection of the edge of the metal portion 45 on the right side of the first opening 25 close to the first opening 25 on the substrate 10 is located between the orthographic projection of the edge of the right side of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the right side of the second opening 53 on the substrate 10.

[0060] In a specific example, Figure 4 and Figure 7 As shown, the orthographic projection of the left edge of the second opening 53 on the substrate 10 is located between the orthographic projection of the edge of the metal portion 45 on the left side of the first opening 25 on the substrate 10 and the orthographic projection of the center 26 of the first opening 25 on the substrate 10; the orthographic projection of the right edge of the second opening 53 on the substrate 10 is located between the orthographic projection of the edge of the metal portion 45 on the right side of the first opening 25 on the substrate 10 and the orthographic projection of the center 26 of the first opening 25 on the substrate 10.

[0061] In a specific example, Figure 4 and Figure 7As shown, the second portion 472 of the metal portion 45 on the left side of the first opening 25 changes the light path 4912, and the first portion 462 blocks the light path 4902, which can reduce the light output of the light emitting layer 23 at a large angle on the left side; the second portion 473 of the metal portion 45 on the right side of the first opening 25 changes the light path 4913, and the first portion 463 blocks the light path 4903, which can reduce the light output of the light emitting layer 23 at a large angle on the right side;

[0062] Furthermore, the first portion 462 of the metal portion 45 and the black matrix layer 52 on the left side of the first opening 25 can block the light output on the left side of the sub-pixel, so that the left viewing angle display control is invisible, and the second portion 472 reflects the light emitted from the left side of the sub-pixel; at the same time, the first portion 463 of the metal portion 45 and the black matrix layer 52 on the right side of the first opening 25 can block the light output on the right side of the sub-pixel, so that the right viewing angle display control is invisible, and the second portion 473 reflects the light emitted from the right side of the sub-pixel. In this embodiment, in a sub-pixel, metal portions are formed on both the left and right sides of the first opening, so as to control the display viewing angle to be only the normal viewing angle.

[0063] Furthermore, the black matrix layer 52 shields the metal portion 45 , thereby eliminating color separation stray light caused by light reflected from the metal portion 45 .

[0064] It should be noted that in this embodiment, metal parts can also be formed on both sides of the first opening. For example, in the top view of the display panel, metal parts are formed on the upper and lower sides of the first opening; metal parts are formed on the upper left side and the lower right side of the first opening; metal parts are formed on the upper side and the lower left side of the first opening, etc. In this embodiment, metal parts are formed on both sides of the first opening, thereby forming a narrow viewing angle display panel that is visible only at a front viewing angle.

[0065] It should be noted that in this embodiment, metal parts can also be formed on two adjacent sides of the first opening. For example, in the top view of the display panel, metal parts are formed on the upper side and left side of the first opening; metal parts are formed on the upper side and right side of the first opening; metal parts are formed on the lower side and left side of the first opening; opening parts are formed on the lower side and right side of the first opening, etc. In this embodiment, by forming metal parts on both adjacent sides of the first opening, the light output of the light-emitting layer at large angles on the adjacent two sides can be effectively reduced, while the light output on the side opposite to the adjacent two sides can be effectively increased, thereby realizing flexible control of the viewing angle of the display panel.

[0066] It should be noted that the metal parts formed on the adjacent two sides of the first opening in this embodiment can be integrally formed. For example, in the top view of the display panel, the metal parts formed on the upper side and the left side of the first opening are a connected whole; the metal parts formed on the upper side and the right side of the first opening are integrally formed; the metal parts formed on the lower side and the left side of the first opening are a connected whole; the opening parts formed on the lower side and the right side of the first opening are a connected whole, etc. In this embodiment, by forming the integrally formed metal parts on the adjacent two sides of the first opening, the viewing angle of the display panel can be flexibly controlled while saving the process flow.

[0067] In a possible implementation manner, the second touch metal trace is connected to the metal portion.

[0068] In a specific example, Figure 5 As shown, the second touch metal trace 43 is connected to the first portion 46 of the metal portion 45 on the left side of the first opening 25 .

[0069] In another specific example, Figure 6 As shown, the second touch metal trace 43 is connected to the first portion 461 of the metal portion 45 on the right side of the first opening 25 .

[0070] In another specific example, Figure 7 As shown, the second touch metal trace 43 is connected to the first portion 462 of the metal portion 45 on the left side of the first opening 25 , and is connected to the first portion 463 of the metal portion 45 on the right side of the first opening 25 .

[0071] In this embodiment, by connecting the second touch metal wiring to the metal part, the light output of the sub-pixel on the corresponding side blocked by the first part can be increased; meanwhile, the second touch metal wiring can be reused as the metal part to simplify the process flow.

[0072] In a possible implementation, a first spacing is set between the orthographic projection of an edge of the nth side of the first opening on the substrate and the orthographic projection of an edge of the nth metal part on the substrate; a second spacing is set between the orthographic projection of an edge of the nth side of the first opening on the substrate and the orthographic projection of an edge of the nth side of the second opening on the substrate; and the second spacing is greater than the first spacing.

[0073] In a specific example, Figure 1 , Figure 2 and Figure 5As shown, a first spacing 492 is set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal part 45 on the substrate 10; a second spacing 493 is set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10; the second spacing 493 is greater than the first spacing 492.

[0074] In another specific example, Figure 4 As shown, a first spacing 4922 is set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal part 45 on the substrate 10; a second spacing 4932 is set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10; the second spacing 4932 is greater than the first spacing 4922.

[0075] In a specific example, Figure 3 and Figure 6 As shown, a first spacing 4921 is set between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal part 45 on the substrate 10; a second spacing 4931 is set between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the right edge of the second opening 53 on the substrate 10; the second spacing 4931 is greater than the first spacing 4921.

[0076] In a specific example, Figure 4 and Figure 7 As shown, a first spacing 4923 is set between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal part 45 on the substrate 10; a second spacing 4933 is set between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the right edge of the second opening 53 on the substrate 10; the second spacing 4933 is greater than the first spacing 4923.

[0077] In a possible implementation manner, the touch insulating layer includes an insulating layer pattern, and the metal portion is formed at an edge of the insulating layer pattern so that the metal portion includes the first portion and the second portion.

[0078] In a specific example, Figures 1 to 7 As shown, by patterning the touch insulating layer, a slope is formed at the edge of the pattern, and the angle of the slope is adjusted by the exposure, development, and baking process parameters. Further, the cross section of the touch insulating layer can be a regular trapezoid. Further, the thickness of the insulating layer pattern is 1.5μm to 12μm.

[0079] In this embodiment, the touch insulating layer is made into an island shape, and the metal part covers the island slope position of the touch insulating layer. The second part of the metal part on the slope of the touch insulating layer is used to change the light path, and the first part blocks the light path to achieve unidirectional control of the display viewing angle.

[0080] In a possible implementation manner, a value range of the first spacing is 0 μm to 4 μm.

[0081] In a specific example, Figure 1 , Figure 2 and Figure 5 As shown, the first spacing 492 between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal portion 45 on the substrate 10 has a value range of 0 μm to 4 μm;

[0082] In a specific example, Figure 3 and Figure 6 As shown, a first spacing 4921 is set between the orthographic projection of the right edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal portion 45 on the substrate 10, and the value range is 0 μm to 4 μm;

[0083] In a specific example, Figure 4 and Figure 7 As shown, a first spacing 4922 is set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the edge of the metal portion 45 on the substrate 10, and the value range is 0 μm to 4 μm;

[0084] In a specific example, Figure 4 and Figure 7 As shown, a first interval 4923 is set between an orthographic projection of the right edge of the first opening 25 on the substrate 10 and an orthographic projection of the edge of the metal portion 45 on the substrate 10 , and the value range is 0 μm to 4 μm.

[0085] In this embodiment, the risk of peeling is reduced by setting the value range of the first spacing to 0 μm to 4 μm.

[0086] In a possible implementation manner, a value range of the second spacing is 2 μm to 6 μm.

[0087] In a specific example, Figure 1 , Figure 2 and Figure 5 As shown, the value range of the second interval 493 between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10 is 2 μm to 6 μm.

[0088] In a specific example, Figure 3 and Figure 6 As shown, a second interval 4931 is set between an orthographic projection of the right edge of the first opening 25 on the substrate 10 and an orthographic projection of the right edge of the second opening 53 on the substrate 10 and has a value range of 2 μm to 6 μm.

[0089] In a specific example, Figure 4 and Figure 7 As shown, the value range of the second interval 4932 set between the orthographic projection of the left edge of the first opening 25 on the substrate 10 and the orthographic projection of the left edge of the second opening 53 on the substrate 10 is 2 μm to 6 μm.

[0090] In a specific example, Figure 4 and Figure 7 As shown, a second interval 4933 is set between an orthographic projection of the right edge of the first opening 25 on the substrate 10 and an orthographic projection of the right edge of the second opening 53 on the substrate 10 and has a value range of 2 μm to 6 μm.

[0091] This embodiment has the advantage of improving adhesion by setting the value range of the second spacing to the value range of the first spacing plus 2 μm.

[0092] In a specific example, the first spacing is generally required to be greater than or equal to 0 and less than or equal to 1 um to ensure that the pixel light output area is sufficient and the metal portion can block the stray light reflected by the cathode of the pixel definition layer.

[0093] In a specific example, Figure 8 , Fig. 9 and Fig.10 As shown, according to the measured results, when the value of the second spacing minus the first spacing is less than or equal to 0 μm, obvious metal diffraction light will appear; when the value of the second spacing minus the first spacing is greater than 0 μm, the metal diffraction light is significantly eliminated.

[0094] In a specific example, Fig.11 and Fig.12 As shown, when the black matrix layer 52 is used to fully cover the pixel definition layer 21 and the metal part, the display can be visible only at the front viewing angle; when the black matrix layer 52 is used to partially cover the pixel definition layer 21, the display visibility in the direction of the non-covered area of ​​the black matrix layer 52 can be achieved.

[0095] In a possible implementation, the acute angle ranges from 35° to 85°.

[0096] In a specific example, Figure 1 , Figure 2 and Figure 5As shown, the included angle 48 between the second portion 47 and the first plane is an acute angle, and the value range of the acute angle is 35° to 85°.

[0097] In a specific example, Figure 3 and Figure 6 As shown, the included angle 481 between the second portion 471 and the first plane is an acute angle, and the value range of the acute angle is 35° to 85°.

[0098] In a specific example, Figure 4 and Figure 7 As shown, an included angle 482 between the second portion 472 and the first plane is an acute angle, and an included angle 483 between the second portion 473 and the first plane is an acute angle, and the value range of the acute angle is 35° to 85°.

[0099] In this embodiment, by setting the acute angle value range to 35° to 85°, the viewing angle range of the display viewing angle can be effectively improved.

[0100] Another embodiment of the present disclosure provides a display device including the display panel.

[0101] In a specific example, the display device may be any electronic device with a display function, such as a virtual reality (VR) device, an augmented reality (AR) device, a mobile phone, a tablet computer, a laptop computer, an e-reader, or a television.

[0102] Another embodiment of the present disclosure provides a method for preparing a display panel, comprising:

[0103] A third aspect of the present disclosure provides a method for manufacturing a display panel, wherein the display panel includes sub-pixels arranged in an array, and the manufacturing method includes:

[0104] Step S1: providing a substrate;

[0105] Step S2: forming a light-emitting functional layer on the substrate, wherein the light-emitting functional layer comprises a pixel definition layer and a light-emitting layer, wherein the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening;

[0106] Step S3: forming an encapsulation layer on the light-emitting functional layer;

[0107] Step S4: forming a touch function layer on the packaging layer, the touch function layer comprising a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are sequentially stacked, the first touch metal layer comprising a first touch metal trace, and the second touch metal layer comprising a second touch metal trace; wherein, in a sub-pixel, the second touch metal layer further comprises N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part comprises a first part extending along a first direction and a second part extending along a second direction, the first direction is a direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, and the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate;

[0108] Step S5: forming a color filter layer on the touch function layer, the color filter layer comprising a filter layer and a black matrix layer, the black matrix layer having a second opening located in the sub-pixel, the filter layer being located in the sub-pixel, the orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the filter layer on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

[0109] In a specific example, in step S1, when the OLED array substrate is a flexible array substrate, the provided substrate may be polyimide (PI), polyethylene naphthalate (PEN), thermoplastic polyester (PET), etc.; when the OLED array substrate is a rigid array substrate, the substrate may be a rigid material such as glass and quartz.

[0110] In a specific example, after step S1 and before step S2, the method includes:

[0111] Step S11: forming a driving circuit layer or a thin film transistor layer, specifically, forming an active layer on a substrate by a patterning process; forming a gate insulating layer on the active layer by deposition or the like; forming a gate by a patterning process on the gate insulating layer; forming an interlayer dielectric layer on the gate by deposition or the like; then, etching the interlayer dielectric layer to form a via hole exposing the active layer. After the via hole in the interlayer dielectric layer is formed, a source electrode and a drain electrode and a signal line electrically connected to one of the source electrode or the drain electrode are formed. Among them, the active layer can be made of materials such as polysilicon and metal oxide, the gate insulating layer can be made of inorganic insulating materials such as silicon oxide, silicon nitride or silicon oxynitride, and the interlayer dielectric layer can be made of inorganic insulating materials such as silicon oxide, silicon nitride or silicon oxynitride. The gate material includes metals or alloy materials such as aluminum, titanium, and cobalt. During preparation, a gate material layer is first formed by sputtering or evaporation, and then the gate material layer is patterned to form a patterned gate.

[0112] Preferably, before forming the active layer, a barrier layer and a buffer layer are formed on the substrate. For example, the barrier layer and the buffer layer can be formed on the entire surface of the substrate. For example, the barrier layer can be made of inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride, and the buffer layer can also be made of inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride. The barrier layer is beneficial to blocking water and oxygen from entering the OLED formed later from the bottom. The buffer layer is beneficial to the quality of subsequent material deposition.

[0113] The embodiments of the present disclosure do not limit the materials of each functional layer, and the materials of each functional layer are not limited to the above examples. The above has completed the fabrication of the thin film transistor structure. Those skilled in the art will understand that the above thin film transistor takes the top gate structure as an example, but the present disclosure is not limited thereto, and the bottom gate structure is also included in the scope of the present disclosure.

[0114] Step S12: forming a planarization layer, specifically, depositing a planarization layer material, such as an organic material, with a thickness of about 1 μm to 3 μm, covering the above-mentioned film layers, and then patterning it using a composition process to form an opening at a position corresponding to the other of the above-mentioned source and drain electrodes.

[0115] In a specific example, step S2 includes:

[0116] Step S21: depositing an anode layer metal of the OLED in the opening of the planarization layer and patterning to form an anode 22 (the anode is connected to the source), wherein, exemplarily, the material of the anode includes metal oxides such as ITO and IZO or metals such as Ag, Al, Mo or their alloys;

[0117] Step S22: forming a pixel defining layer 21 around the anode by a patterning process. Specifically, a layer of pixel defining layer material is deposited, for example, with a thickness of about 1 μm to 2 μm, and the pixel defining layer 21 is formed in the display area by a patterning process. Exemplarily, the material of the pixel defining layer may include an organic insulating material such as a negative photoresist, polyimide, and epoxy resin;

[0118] Step S23: forming a light-emitting layer 23 on the anode 22 in the opening of the pixel defining layer by inkjet printing or evaporation, wherein the material of the light-emitting layer is an organic material;

[0119] Step S24, forming a cathode 24. The cathode 24 is formed on the entire surface of the OLED array substrate, for example. The material of the cathode may include metals such as Mg, Ca, Li or Al or their alloys, or metal oxides such as IZO and ZTO, or organic materials with conductive properties such as PEDOT / PSS (poly 3,4-ethylenedioxythiophene / polystyrene sulfonate).

[0120] Among them, the anodes corresponding to each pixel are isolated from each other, and the cathodes corresponding to each pixel are connected to each other. An auxiliary light-emitting layer that helps the light-emitting layer to emit light can also be formed between the anode 22 and the light-emitting layer 23 and between the light-emitting layer 23 and the cathode 24. The auxiliary light-emitting layer includes, for example, a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EIL), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL) One or more film layers. The light-emitting layer and the auxiliary light-emitting layer are, for example, organic material layers.

[0121] In a specific example, step S3 includes sequentially forming a first inorganic encapsulation layer 31, an organic encapsulation layer 32, and a second inorganic encapsulation layer 33. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer are formed by deposition or the like. The organic encapsulation layer is formed by inkjet printing. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be formed of inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride, and the organic encapsulation layer can be formed of organic materials such as polyimide (PI) and epoxy resin. Thus, the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are formed into a composite encapsulation layer, which can form multiple protections for the functional structure of the display area and has a better encapsulation effect.

[0122] In a specific example, step S4 includes sequentially forming a first touch metal layer 41 (Touch Metal A, TMA), a touch insulating layer 42, a second touch metal layer 43 (Touch Metal B, TMB) and a touch protection layer 44 (TOC). Further, the second touch metal layer 43 includes a second touch metal wiring; wherein, in a sub-pixel, the second touch metal layer 43 also includes N metal parts 45, N ≥ 1.

[0123] In a specific example, step S5 includes setting a color filter layer 50 on the side of the touch function layer 40 away from the substrate 10. The color filter layer 50 can be directly made on the surface of the touch function layer 40 to form a COE structure. The color filter layer 50 is an inorganic material, which can reduce the thickness of the display panel, thereby increasing the bending characteristics of the flexible OLED display panel. The color filter layer 50 includes a filter layer 51 and a black matrix layer 52 arranged in the same layer, or the black matrix layer is arranged on the side of the filter layer away from the substrate; wherein the black matrix layer 52 is located in the non-luminous area, and the filter layer 51 is located in the luminous area. The material of the filter layer 51 may include but is not limited to colored resins, such as red resin, green resin and blue resin. The filter layer 51 can filter out the miscellaneous colors in the ambient light. The material of the black matrix layer 52 may include but is not limited to black matrix. The black matrix layer 52 is configured to prevent light of different colors emitted from other luminous areas from entering the luminous area to ensure the color purity of the light emitted from each luminous area, thereby improving the display effect of the display panel.

[0124] In this embodiment, a metal part is provided on the second touch metal layer, which can effectively reduce the thickness of the display panel compared with the related art that controls the light output of the display panel by laminating a film material for controlling the light path. In addition, by providing the metal part including a first part extending along the first direction and a second part extending along the second direction, the light emitted from the light-emitting layer in the sub-pixel to the first part is blocked by the first part during transmission, and the light emitted from the light-emitting layer in the sub-pixel to the second part is reflected by the second part during transmission, which can effectively reduce the light output of the light-emitting layer at a large angle on one side, thereby realizing flexible control of the viewing angle of the display panel. In addition, by providing the metal part including a second part extending along the second direction, the light emitted from the light-emitting layer in the sub-pixel to the second part is reflected by the second part during transmission, which can effectively increase the light output on the opposite side. Finally, by providing the orthographic projection of the edge of the nth side of the second opening on the substrate to be located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate, the stray light reflected from the second part can be effectively eliminated.

[0125] In a possible implementation, forming the touch insulating layer includes: forming an insulating layer pattern; and forming the metal portion includes: forming the metal portion at an edge of the insulating layer pattern so that the metal portion includes the first portion and the second portion.

[0126] In a specific example, Figures 1 to 7 As shown, by patterning the touch insulating layer, a slope is formed at the edge of the pattern, and the angle of the slope is adjusted by the exposure, development, and baking process parameters. Further, the cross section of the touch insulating layer can be a regular trapezoid. Further, the thickness of the insulating layer pattern is 1.5μm to 12μm.

[0127] In this embodiment, the touch insulating layer is made into an island shape, and the metal part covers the island slope position of the touch insulating layer. The second part of the metal part on the slope of the touch insulating layer is used to change the light path, and the first part blocks the light path to achieve unidirectional control of the display viewing angle.

[0128] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that: The display panel comprises a substrate, a light-emitting functional layer, an encapsulation layer, a touch functional layer and a color film layer which are stacked in sequence, and the display panel comprises sub-pixels arranged in an array; The light-emitting function layer comprises a pixel definition layer and a light-emitting layer, wherein the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening; The color filter layer includes a filter layer and a black matrix layer, the black matrix layer has a second opening located in the sub-pixel, the filter layer is located in the sub-pixel, and the orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the filter layer on the substrate; The touch function layer includes a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are stacked in sequence, the first touch metal layer includes a first touch metal trace, and the second touch metal layer includes a second touch metal trace; Among them, in a sub-pixel, the second touch metal layer also includes N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part includes a first part extending along a first direction and a second part extending along a second direction, the first direction is the direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

2. The display panel according to claim 1, characterized in that: The touch insulating layer includes an insulating layer pattern, and the metal portion is formed at an edge of the insulating layer pattern such that the metal portion includes the first portion and the second portion.

3. The display panel according to claim 1, characterized in that: The black matrix layer is arranged on a side of the filter layer away from the substrate.

4. The display panel according to claim 1, characterized in that: The second touch metal wiring is connected to the metal portion.

5. The display panel according to claim 1, characterized in that: A first distance is set between an orthographic projection of an edge of the nth side of the first opening on the substrate and an orthographic projection of an edge of the nth metal portion on the substrate; A second distance is provided between an orthographic projection of an edge of the nth side of the first opening on the substrate and an orthographic projection of an edge of the nth side of the second opening on the substrate; The second interval is greater than the first interval.

6. The display panel according to claim 5, characterized in that: The first spacing has a value range of 0 μm to 4 μm.

7. The display panel according to claim 6, characterized in that: The second spacing has a value range of 2 μm to 6 μm.

8. The display panel according to claim 1, characterized in that: The acute angle ranges from 35° to 85°.

9. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 8.

10. A method for preparing a display panel, characterized in that: The display panel includes sub-pixels arranged in an array, and the preparation method includes providing a substrate; forming a light-emitting functional layer on the substrate, wherein the light-emitting functional layer comprises a pixel definition layer and a light-emitting layer, wherein the pixel definition layer has a first opening located in the sub-pixel, and the light-emitting layer is located in the first opening; forming an encapsulation layer on the light-emitting functional layer; A touch function layer is formed on the encapsulation layer, the touch function layer comprising a first touch metal layer, a touch insulating layer, a second touch metal layer and a touch protection layer which are sequentially stacked, the first touch metal layer comprising a first touch metal trace, and the second touch metal layer comprising a second touch metal trace; wherein, in a sub-pixel, the second touch metal layer further comprises N metal parts, N≥1, the nth metal part is on the nth side of the first opening, n∈[1,N], the nth metal part comprises a first part extending along a first direction and a second part extending along a second direction, the first direction is a direction in which the nth metal part points to the first opening in a first plane, the first plane is a plane parallel to the substrate, the angle between the second part and the first plane is an acute angle, and the orthographic projection of the metal part on the substrate partially overlaps with the orthographic projection of the first opening on the substrate; A color filter layer is formed on the touch function layer, the color filter layer includes a filter layer and a black matrix layer, the black matrix layer has a second opening located in the sub-pixel, the filter layer is located in the sub-pixel, the orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the filter layer on the substrate, and the orthographic projection of the edge of the nth side of the second opening on the substrate is located between the orthographic projection of the edge of the nth metal part on the substrate and the orthographic projection of the center of the first opening on the substrate.

11. The preparation method according to claim 10, characterized in that: Forming the touch insulating layer includes: forming an insulating layer pattern; Forming the metal portion includes forming the metal portion at an edge of the insulating layer pattern such that the metal portion includes the first portion and the second portion.

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