Intermediate panel, display panel, and display module

Abstract

An intermediate panel, a display panel, and a display module. The display panel is provided with a display area and a frame area, and the frame area surrounds the periphery of the display area. The frame area comprises a first area and a second area, and the first area and the second area are sequentially distributed away from the display area. The display panel comprises a display substrate, a touch layer, a color film layer, and a first protective layer, and the touch layer, the color film layer, and the first protective layer are sequentially stacked on a display side of the display substrate. The touch layer comprises a metal layer and an inorganic dielectric layer. The thickness of the display substrate in the second area is less than the thickness of the display substrate in the first area. The first protective layer extends from the display area to the first area. According to the described display panel, an area to be cut out is removed by means of cutting an intermediate panel, so that the preparation quality and the display quality of the display panel can be ensured.

Description

Mid-panel, display panel and display module Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and particularly relate to an intermediate panel, a display panel, and a display module. Background Art

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-luminescence, low power consumption, lightness, flexibility, brilliant colors, high contrast, and fast response rate. Summary of the Invention

[0003] In a first aspect, an embodiment of the present disclosure provides a display panel, comprising a display area and a frame area, wherein the frame area is arranged around the periphery of the display area.

[0004] The frame area includes a first area and a second area, and the first area and the second area are sequentially distributed away from the display area;

[0005] The display panel includes a display substrate, a touch layer, a color filter layer and a first protective layer, wherein the touch layer, the color filter layer and the first protective layer are sequentially stacked on the display side of the display substrate.

[0006] The touch layer includes a metal layer and an inorganic dielectric layer.

[0007] The thickness of the display substrate in the second area is smaller than the thickness of the display substrate in the first area;

[0008] The first protection layer extends from the display area to the first area.

[0009] In some embodiments, a second protective layer is further included and is located between the touch layer and the color filter layer.

[0010] The second protection layer extends from the display area to the first area.

[0011] In some embodiments, the inorganic dielectric layer extends from the display area to the first area.

[0012] In the first region, the orthographic projection of the first protective layer on the display substrate covers the boundary between the inorganic medium layer and the orthographic projection of the second protective layer on the display substrate.

[0013] In some embodiments, in the first region, the orthographic projection of the second protection layer on the display substrate covers the orthographic projection boundary of the inorganic medium layer on the display substrate.

[0014] In some embodiments, in the first region, an orthographic projection boundary of the second protective layer on the display substrate is located on a side of an orthographic projection boundary of the inorganic medium layer on the display substrate close to the display region.

[0015] In some embodiments, the first protective layer and / or the second protective layer do not overlap with the second region.

[0016] In some embodiments, the display substrate includes a base, a driving circuit, and a light-emitting device, wherein the driving circuit and the light-emitting device are sequentially stacked on a side of the base close to the touch layer.

[0017] The driving circuit includes a plurality of conductive layers stacked in sequence, an inorganic insulating layer is provided between any two adjacent conductive layers in a portion close to the substrate, and an organic insulating layer is provided between any two adjacent conductive layers in a portion away from the substrate.

[0018] The light emitting device is located in the display area,

[0019] The substrate extends from the display area to the frame area,

[0020] The plurality of conductive layers, the inorganic insulating layer and the organic insulating layer are located in the display area,

[0021] At least a portion of the inorganic insulating layer also extends to the first region.

[0022] In some embodiments, a portion of the organic insulating layer is also located in the second region.

[0023] In some embodiments, the inorganic insulating layer includes an intermediate dielectric layer, and the intermediate dielectric layer further extends to the first region.

[0024] A plurality of grooves are formed in a portion of the intermediate dielectric layer located in the first region, and the plurality of grooves are located on a side of the intermediate dielectric layer facing away from the substrate;

[0025] The plurality of grooves are distributed along an arrangement direction of the display area and the first area.

[0026] In some embodiments, the invention further includes at least one first film layer, wherein the at least one first film layer is sequentially stacked on a side of the first protective layer facing away from the display substrate.

[0027] The at least one first film layer covers the display substrate, and the at least one first film layer is adapted to the shapes of surfaces in contact with the first protective layer and the display substrate.

[0028] In some embodiments, the first film layer includes an optical processing film layer and / or a protective cover plate.

[0029] In a second aspect, an embodiment of the present disclosure further provides an intermediate panel, wherein the intermediate panel has a display area and a frame area, wherein the frame area is arranged around the periphery of the display area.

[0030] The frame area includes a reserved area and an area to be cut, and the reserved area and the area to be cut are sequentially distributed away from the display area;

[0031] The reserved area includes a first area and a second area, the area to be cut includes a third area and a fourth area, and the first area, the second area, the third area and the fourth area are sequentially distributed away from the display area;

[0032] The intermediate panel includes a display substrate, a touch layer, a color filter layer and a first protective layer, wherein the touch layer, the color filter layer and the first protective layer are sequentially stacked on the display side of the display substrate.

[0033] The touch layer includes a stacked metal layer and an inorganic dielectric layer.

[0034] The metal layer and the color filter layer are located in the display area;

[0035] The inorganic dielectric layer extends from the display area to the first area,

[0036] The thickness of the display substrate in the second area and the third area is smaller than the thickness of the display substrate in the first area and the fourth area;

[0037] The first protection layer extends from the display area to the first area.

[0038] In some embodiments, a second protective layer is further included and is located between the touch layer and the color filter layer.

[0039] The second protection layer extends from the display area to the first area.

[0040] In some embodiments, the inorganic dielectric layer also remains in the second region and the third region;

[0041] The first protection layer and the second protection layer do not overlap with the second region and the third region.

[0042] In a third aspect, an embodiment of the present disclosure further provides a display module, which includes the above-mentioned display panel.

[0043] The intermediate panel provided by the embodiment of the present disclosure can avoid contact between the first protective layer and the inorganic dielectric layer remaining in the second and third areas by extending the first protective layer from the display area to the first area. That is, the orthographic projections of the first protective layer, the second area, and the third area on the display substrate do not overlap. This can prevent the first protective layer from coming into contact with the inorganic dielectric layer remaining in the second and third areas when the protective film covering other film layers is subsequently removed. This can prevent the first protective layer from being peeled off from the inorganic dielectric layer remaining in the second and third areas, thereby ensuring the quality of the intermediate panel.

[0044] The display panel provided by the embodiment of the present disclosure is formed by cutting the intermediate panel and removing the area to be cut, thereby ensuring the preparation quality and display quality of the display panel.

[0045] The display module provided by the embodiment of the present disclosure ensures the manufacturing quality and display quality of the display module by adopting the display panel in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which:

[0047] FIG1a is a schematic cross-sectional view of the structure of the frame area of ​​the OLED middle panel before etching of the inorganic dielectric layer in the related art.

[0048] FIG1 b is a schematic cross-sectional view of the structure remaining after etching the inorganic dielectric layer in the frame area of ​​the OLED middle panel in the related art.

[0049] FIG1c is a cross-sectional schematic diagram showing peeling between the first protective film and the inorganic dielectric layer in the frame area of ​​the OLED middle panel in the related art.

[0050] FIG1 d is a cross-sectional schematic diagram showing peeling between the second protective film and the inorganic dielectric layer in the frame area of ​​the OLED middle panel in the related art.

[0051] FIG2 a is a schematic top view of an intermediate panel according to an embodiment of the present disclosure.

[0052] FIG. 2 b is a schematic cross-sectional view of the structure along the AA′ section line in FIG. 2 a .

[0053] FIG. 2 c is a schematic cross-sectional view of the structure along the BB′ section line in FIG. 2 a .

[0054] FIG3 a is a schematic cross-sectional view of another structure along the AA′ section line in FIG2 a .

[0055] FIG3 b is a schematic cross-sectional view of another structure along the BB′ section line in FIG2 a .

[0056] FIG3 c is another schematic cross-sectional view of the structure along the BB′ section line in FIG2 a .

[0057] FIG3 d is a schematic cross-sectional view of another structure along the BB′ section line in FIG2 a .

[0058] FIG4 a is a schematic cross-sectional view of another structure along the BB′ section line in FIG2 a .

[0059] FIG4 b is a schematic cross-sectional view of another structure along the BB′ section line in FIG2 a .

[0060] FIG5 a is a schematic cross-sectional view of a border region of a display panel according to an embodiment of the present disclosure.

[0061] FIG5 b is a cross-sectional schematic diagram of another display panel border region in an embodiment of the present disclosure.

[0062] FIG5 c is a cross-sectional schematic diagram of another display panel frame region in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0063] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, an intermediate panel, a display panel, and a display module provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0064] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully enable those skilled in the art to understand the scope of this disclosure.

[0065] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions shown in the drawings illustrate specific shapes of the regions, but are not intended to be limiting.

[0066] In the related art, referring to Figures 1a-1c, Figure 1a is a schematic cross-sectional view of the structure of the frame area of ​​the OLED intermediate panel before etching of the inorganic dielectric layer; Figure 1b is a schematic cross-sectional view of the structure remaining after etching of the inorganic dielectric layer in the frame area of ​​the OLED intermediate panel; Figure 1c is a schematic cross-sectional view of the OLED intermediate panel in the related art showing peeling between the first protective film and the inorganic dielectric layer in the frame area; the OLED intermediate panel includes a display substrate, a touch layer, a color filter layer, and a first protective film 20, which are sequentially stacked on the display side of the display substrate. The first protective film 20 is used to protect the color filter layer and to smooth the display side surface of the display substrate so that the OLED intermediate panel can be formed into an OLED display panel through the subsequent module process (i.e., MDL process).

[0067] The OLED middle panel has a display area 100 and a frame area. The frame area is arranged around the display area 100. The three side frame areas outside the display area 100 include a reserved area 101 and an area to be cut 102. The reserved area 101 and the area to be cut 102 are distributed away from the display area 100 in sequence. The reserved area 101 is usually used to lay out test circuits and other display circuits (such as electrostatic rings, grounding wires, etc.). The test circuit is used to test whether the circuit in the display area 100 is abnormal or damaged. The reserved area 101 is usually reserved in the OLED display panel. The area to be cut 102 is used to protect the display area 100 during the intermediate circulation and transportation of the OLED middle panel to prevent external bumps from damaging the circuit structure of the display area 100. The area to be cut 102 is not retained in the OLED display panel. The area to be cut 102 is generally cut and removed in the subsequent module process of the OLED middle panel. The subsequent module process for the OLED intermediate panel includes attaching other film materials (such as a light extraction layer, a protective cover, etc.) to the side of the first protective film 20 facing away from the display substrate, cutting and removing the area to be cut 102 along the cutting line, and removing the protective film on the other film materials. In the subsequent module process (MDL process), the area to be cut 102 to be cut along the cutting line is cut to remove the area to be cut 102. The boundary P between the reserved area 101 and the area to be cut 102 refers to the boundary between the reserved area 101 and the area to be cut 102, that is, the cutting line.

[0068] The display substrate includes a base 10, multiple inorganic insulating layers 23, and multiple organic insulating layers 24, which are stacked sequentially on one side of the base 10. At least a portion of the inorganic insulating layers 23 extends from the display area 100 to the reserved area 101. Portions of the inorganic insulating layers 23 and at least a portion of the organic insulating layers 24 also overlap the to-be-cut area 102 to prevent external forces from being transmitted from the edge of the intermediate panel to the display area 100, thereby preventing damage to the display area circuitry. In order to reduce the cutting thickness of the inorganic insulating layer 23 in the cutting path and prevent the cracks in the inorganic insulating layer 23 caused by the cutting force from being transmitted to the display area 100, the inorganic insulating layer 23 is not provided in the edge area where the reserved area 101 and the area to be cut 102 meet. The edge area where the reserved area 101 and the area to be cut 102 meet refers to the area of ​​the reserved area 101 close to the boundary line between the reserved area 101 and the area to be cut 102 and the area of ​​the area to be cut 102 close to the boundary line between the reserved area 101 and the area to be cut 102. The edge area bordering the area to be cut 102 is only provided with a substrate 10 or a partial organic insulating layer 24 is provided on the substrate 10, so that the thickness of the display substrate in the edge area bordering the reserved area 101 and the area to be cut 102 is much smaller than the thickness of the display substrate in the area adjacent to the edge area of ​​the area to be cut 102 bordering the reserved area 101, that is, the edge area bordering the reserved area 101 and the area to be cut 102 on the display substrate and the area adjacent to the edge area of ​​the area to be cut 102 bordering the reserved area 101 form a large height difference Δh.

[0069] The touch layer includes two metal layers stacked in sequence and an inorganic dielectric layer 22 located between the two metal layers. When preparing the inorganic dielectric layer 22 in the touch layer on the display side of the display substrate, a film is first formed on the entire display side of the display substrate, and then the inorganic dielectric layer film located in the border area of ​​the reserved area 101 and the area to be cut 102 is removed through the steps of photoresist coating, exposure, development, and etching. Since there is a large height difference Δh between the edge area of ​​the border between the reserved area 101 and the area to be cut 102 on the display substrate and the area adjacent to the edge area of ​​the area to be cut 102 bordering the reserved area 101, the photoresist exposure in the edge area of ​​the border between the reserved area 101 and the area to be cut 102 is insufficient, resulting in the inorganic dielectric layer 22 remaining in the edge area of ​​the border between the reserved area 101 and the area to be cut 102. The first protective film 20 subsequently applied covers the entire display substrate, and the first protective film 20 is partially in contact with and adheres to the remaining inorganic dielectric layer 22.

[0070] Subsequently, other film layers (such as a light extraction layer, a protective cover plate, etc.) are attached to the first protective film 20, and then the protective films covering the other film layers are removed, and finally the to-be-cut area 102 is cut and removed. During the process of removing the protective films on the other film layers, due to the weak bonding force between the first protective film 20 and the remaining inorganic dielectric layer 22, the first protective film 20 and the remaining inorganic dielectric layer 22 are peeled off, and the first protective film 20 is torn off together, seriously affecting the quality of the OLED display panel.

[0071] Similarly, referring to Figure 1d, a cross-sectional diagram illustrating peeling between the second protective film and the inorganic dielectric layer in the frame area of ​​an OLED intermediate panel in the related art is shown. Based on the aforementioned structure of an OLED display panel, related art sometimes incorporates a second protective film 25 between the touch layer and the color filter layer. This second protective film 25 serves to protect the touch layer and smooth the display-side surface of the display substrate, facilitating subsequent application of other layers over the first protective film 20. Subsequently, the second protective film 25 is applied to the side of the touch layer facing away from the display substrate, followed by the color filter layer. Finally, the first protective film 20 is applied to the side of the color filter layer facing away from the display substrate.

[0072] In this embodiment, the second protective film 25 covers the entire display substrate, and the second protective film 25 is partially in contact with and adheres to the residual inorganic dielectric layer 22. In the process of tearing off the protective films on other film layers, due to the weak bonding force between the second protective film 25 and the residual inorganic dielectric layer 22, the second protective film 25 and the residual inorganic dielectric layer 22 are peeled off, and the second protective film 25 is torn off together, which also seriously affects the quality of the OLED display panel.

[0073] In order to solve the problem in the related art that the first protective film and / or the second protective film are easily peeled off from the display substrate, in a first aspect, an embodiment of the present disclosure provides an intermediate panel. Referring to Figures 2a, 2b, and 2c, Figure 2a is a schematic top view of an intermediate panel in an embodiment of the present disclosure;

[0074] FIG2b is a schematic cross-sectional view of a structure along the AA' section line in FIG2a; FIG2c is a schematic cross-sectional view of a structure along the BB' section line in FIG2a; wherein the middle panel has a display area 100 and a frame area, the frame area is arranged around the periphery of the display area 100, the frame area includes a reserved area 101 and a to-be-cut area 102, the reserved area 101 and the to-be-cut area 102 are distributed away from the display area 100 in sequence; the reserved area 101 includes a first area 101a and a second area 101b, the to-be-cut area 102 includes a third area 102a and a fourth area 102b, the first area 101a, the second area 101b, the third area 102a and the fourth area 102b are distributed in sequence Distributed away from the display area 100; the middle panel includes a display substrate 1, a touch layer 2, a color filter layer 4 and a first protective layer 3. The touch layer 2, the color filter layer 4 and the first protective layer 3 are stacked in sequence on the display side of the display substrate 1. The touch layer 2 includes a stacked metal layer 21 and an inorganic dielectric layer 22. The metal layer 21 and the color filter layer 4 are located in the display area 100. The inorganic dielectric layer 22 extends from the display area 100 to the first area 101a. The thickness h1 of the display substrate 1 in the second area 101b and the third area 102a is less than the thickness h2 of the display substrate 1 in the first area 101a and the fourth area 102b. The first protective layer 3 extends from the display area 100 to the first area 101a.

[0075] The first protective layer 3 is made of a special, optically transparent, double-sided adhesive material without a substrate. It is thick, and the surface of the first protective layer 3 facing away from the display substrate 1 is flat. This first protective layer 3 not only protects the color filter layer 4 but also smoothes the display-side surface of the display substrate 1, facilitating the subsequent application of other layers, such as a light extraction layer and a protective cover, over the first protective layer 3.

[0076] In some embodiments, other film layers, such as a light extraction layer, a protective cover plate, etc., are subsequently attached to the side of the first protective layer 3 facing away from the display substrate 1 of the intermediate panel, and then the protective films covering the other film layers are torn off.

[0077] In this embodiment, since the thickness h1 of the display substrate 1 in the second area 101b and the third area 102a is less than the thickness h2 of the display substrate 1 in the first area 101a and the fourth area 102b, there is a large height difference between the second area 101b and the third area 102a and the first area 101a and the fourth area 102b, and the inorganic dielectric layer 22 is likely to remain in the second area 101b and the third area 102a during the preparation process.

[0078] In this embodiment, by extending the first protective layer 3 from the display area 100 to the first area 101a, that is, the orthographic projections of the first protective layer 3 and the second area 101b and the third area 102a on the display substrate 1 do not overlap, the first protective layer 3 can be prevented from contacting the inorganic dielectric layer 22 remaining in the second area 101b and the third area 102a. This can prevent the first protective layer 3 from peeling off from the inorganic dielectric layer 22 remaining in the second area 101b and the third area 102a when the protective film covering other film layers is subsequently torn off, thereby preventing the first protective layer 3 from being torn off together, thereby ensuring the quality of the intermediate panel.

[0079] In some embodiments, referring to Figures 3a and 3b, Figure 3a is another structural cross-sectional schematic diagram along the AA' section line in Figure 2a; Figure 3b is another structural cross-sectional schematic diagram along the BB' section line in Figure 2a; the intermediate panel further includes a second protective layer 5, located between the touch layer 2 and the color filter layer 4, and the second protective layer 5 extends from the display area 100 to the first area 101a.

[0080] The second protective layer 5 is made of a special, optically transparent, double-sided adhesive material without a substrate. It is relatively thick, and the surface of the second protective layer 5 facing away from the display substrate 1 is flat. This second protective layer 5 protects the touch layer 2 while also smoothing the display-side surface of the display substrate 1, facilitating the subsequent formation of the color filter layer 4 and first protective layer 3 above the second protective layer 5.

[0081] In this embodiment, by extending the second protective layer 5 from the display area 100 to the first area 101a, that is, the orthographic projections of the second protective layer 5 and the second and third areas 101b and 102a on the display substrate 1 do not overlap, the second protective layer 5 can be prevented from contacting the inorganic dielectric layer 22 remaining in the second and third areas 101b and 102a, thereby preventing the second protective layer 5 from peeling off from the inorganic dielectric layer 22 remaining in the second and third areas 101b and 102a when the protective films covering other film layers are subsequently torn off, thereby preventing the second protective layer 5 from being torn off together, thereby ensuring the quality of the intermediate panel.

[0082] In some embodiments, referring to FIG3b , within the first region 101a , the orthographic projection of the first protective layer 3 on the display substrate 1 covers the boundary of the orthographic projection of the inorganic dielectric layer 22 and the second protective layer 5 on the display substrate 1. With this arrangement, on the one hand, the first protective layer 3 can provide a protective covering for the inorganic dielectric layer 22, preventing the inorganic dielectric layer 22 from being cracked or damaged by the cutting stress during cutting of the to-be-cut region 102 , and also preventing the inorganic dielectric layer 22 from transmitting cracks or damage therein to the display region 100 during cutting of the to-be-cut region 102 ; on the other hand, it can smoothen the display side surfaces of the display region 100 and the first region 101a of the intermediate panel, thereby facilitating the attachment of other film layers, such as a light extraction layer, a protective cover plate, etc., to the smooth surface, thereby ensuring the production quality and display quality of the entire intermediate panel.

[0083] In some embodiments, referring to FIG. 3 b , within the first region 101 a , the orthographic projection of the second protective layer 5 on the display substrate 1 covers the orthographic projection boundary of the inorganic dielectric layer 22 on the display substrate 1. With this configuration, the second protective layer 5 can provide a protective covering for the inorganic dielectric layer 22, preventing the inorganic dielectric layer 22 from being cracked or damaged by the cutting stress during cutting of the to-be-cut region 102 . Furthermore, the second protective layer 5 can prevent the inorganic dielectric layer 22 from transmitting cracks or damage therein to the display region 100 during cutting of the to-be-cut region 102 .

[0084] In some embodiments, referring to FIG. 3 c , another cross-sectional view of the structure along the BB′ section line in FIG. 2 a is shown; in the first region 101 a , the orthographic projection boundary of the second protective layer 5 on the display substrate 1 is located on the side of the orthographic projection boundary of the inorganic dielectric layer 22 on the display substrate 1 that is closer to the display region 100. This arrangement, because the first protective layer 3 provides protective coverage for the inorganic dielectric layer 22, prevents the inorganic dielectric layer 22 from cracking or damaging due to cutting stress during cutting of the uncut region 102. It also prevents the inorganic dielectric layer 22 from transmitting cracks or damage to the display region 100 during cutting of the uncut region 102.

[0085] In some embodiments, referring to Figures 2c, 3b, and 3c, the inorganic dielectric layer 22 remains in the second region 101b and the third region 102a, and the first protective layer 3 and the second protective layer 5 do not overlap with the second region 101b and the third region 102a. Since the remaining inorganic dielectric layer 22 does not contact the first protective layer 3 and the second protective layer 5, when the protective films covering other film layers are subsequently removed, no peeling will occur between the first protective layer 3 and the inorganic dielectric layer 22, nor between the second protective layer 5 and the inorganic dielectric layer 22, thereby ensuring the quality of the intermediate panel.

[0086] In some embodiments, referring to FIG. 3 d , it is another schematic cross-sectional view of the structure along the BB′ section line in FIG. 2 a ; the inorganic dielectric layer 22 and the second protective layer 5 are further located in the fourth region 102 b .

[0087] In some embodiments, referring to Figures 2b, 3a and 4a, Figure 4a is another structural cross-sectional schematic diagram along the BB' section line in Figure 2a; the display substrate 1 includes a base 10, a driving circuit 11 and a light-emitting device 12. The driving circuit 11 and the light-emitting device 12 are sequentially stacked on the side of the base 10 close to the touch layer 2. The driving circuit 11 includes a plurality of conductive layers stacked in sequence. An inorganic insulating layer is provided between any two adjacent conductive layers close to the base 10, and an organic insulating layer is provided between any two adjacent conductive layers away from the base 10. The light-emitting device 12 is located in the display area 100. The base 10 extends from the display area 100 to the frame area. The plurality of conductive layers, inorganic insulating layers and organic insulating layers are located in the display area 100. At least part of the inorganic insulating layer also extends to the first area 101a, part of the inorganic insulating layer is also located in the fourth area 102b, and at least part of the organic insulating layer is also located in the fourth area 102b.

[0088] Among them, the multiple conductive layers in the driving circuit 11 are stacked in sequence along the direction away from the substrate 10, and the partial conductive layers close to the substrate 10 refer to the multiple conductive layers stacked in sequence that are closer to the substrate 10 and farther away from the light-emitting device 12 along the direction away from the substrate 10; the partial conductive layers away from the substrate 10 refer to the multiple conductive layers stacked in sequence that are farther away from the substrate 10 and closer to the light-emitting device 12 along the direction away from the substrate 10.

[0089] In some embodiments, referring to Figures 2b and 3a, the conductive layers in the driving circuit 11 include the active layer 110 of the transistor, the gate 111, the source 112, the drain 113, the first and second plates 114 and 115 of the capacitor, the first connecting structure and signal line layer 116, and the second connecting structure and signal line layer 117. The gate 111 and the first plate 114 are on the same layer, and the source 112 and the drain 113 are on the same layer and are located on the side of the second plate 115 facing away from the substrate 10. The inorganic insulating layer includes a gate insulating layer 13 located between the gate 111 and the active layer 110, an intermediate dielectric layer 14 located between the gate 111 and the second plate 115, and a passivation layer 15 located between the second plate 115 and the source 112 and drain 113. The organic insulating layer includes a first layer 16 located between the source electrode 112, the drain electrode 113, and the first connecting structure and signal line layer 116; a second layer 17 located between the first connecting structure and signal line layer 116 and the second connecting structure and signal line layer 117; and a third layer 18 located between the second connecting structure and signal line layer 117 and the light-emitting device 12. A pixel defining layer 27 is also provided between the light-emitting device 12 and the third layer 18. The pixel defining layer 27 has an opening, and the light-emitting device 12 is located in the opening. The light-emitting device 12 includes an anode 121, a light-emitting functional layer 122, and a cathode 123, which are stacked in sequence away from the display substrate 1. The light-emitting functional layer 122 can be made of an organic electroluminescent material.

[0090] In some embodiments, an encapsulation layer 26 is further provided between the touch layer 2 and the light-emitting device 12 , and the encapsulation layer 26 is used to encapsulate the light-emitting device 12 .

[0091] In some embodiments, referring to Figure 4a, no inorganic insulating layer and organic insulating layer are set in the second area 101b and the third area 102a, and only the substrate 10 is set. Since the subsequent cutting and removal of the to-be-cut area 102 is performed in the second area 101b and the third area 102a, such a setting can reduce the cutting difficulty, improve the cutting efficiency, and at the same time avoid the cutting stress from being transmitted to the display area 100 through the inorganic insulating layer.

[0092] In some embodiments, referring to Figure 4a, the inorganic insulating layer includes an intermediate dielectric layer 14, and the organic insulating layer includes a first layer 16, a second layer 17 and a third layer 18. The intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 are also located in the fourth area 102b. The intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 are stacked in sequence away from the substrate 10, and the orthographic projections of the intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 on the substrate 10 at least partially overlap.

[0093] Among them, the intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 located in the fourth area 102b are stacked to form a small hill-shaped protrusion, and the small hill-shaped protrusion is continuously arranged around the periphery of the display area 100 to form a dam. The first layer 16, the second layer 17 and the third layer 18 are made of organic resin material and have certain flexibility, so that the dam can prevent the external force acting on the middle panel frame area (such as the collision force during transportation) from being transmitted to the display area 100, thereby preventing the external force from causing damage or damage to the film layer structure of the display area.

[0094] In some embodiments, the organic insulating layers stacked in sequence may also be the first layer 16, the second layer 17, the third layer 18 and the pixel defining layer 27, or the organic insulating layers stacked in sequence may also be any two or three layers of the first layer 16, the second layer 17, the third layer 18 and the pixel defining layer 27.

[0095] In some embodiments, referring to Figures 2c, 3b, and 3c, portions of the organic insulating layer are also located in the second region 101b and the third region 102a. As in this embodiment, the first layer 16 of the organic insulating layer is also located in the second region 101b and the third region 102a. The provision of the first layer 16 does not increase the difficulty of cutting the area to be cut 102, while also preventing the transmission of cutting stress through the inorganic insulating layer to the display area 100.

[0096] In some embodiments, referring to Figures 2c, 3b and 3c, the inorganic insulating layer includes an intermediate dielectric layer 14, and the organic insulating layer includes a first layer 16, a second layer 17 and a third layer 18. The intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 are also located in the fourth area 102b. The intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 are stacked in sequence away from the substrate 10, and the orthographic projections of the intermediate dielectric layer 14, the first layer 16, the second layer 17 and the third layer 18 on the substrate 10 at least partially overlap; the first layer 16 is also located in the second area 101b and the third area 102a.

[0097] Comparing the above FIG4a with the solutions in FIG2c, FIG3b, and FIG3c, in FIG4a, no inorganic insulating layer and organic insulating layer are provided in the second area 101b and the third area 102a, and only the substrate 10 is provided. The height difference between the second area 101b and the third area 102a and the first area 101a and the fourth area 102b is significantly greater than the case in FIG2c, FIG3b, and FIG3c where the first layer 16 is still located in the second area 101b and the third area 102a. Therefore, in the solution in FIG4a, the inorganic dielectric layer 22 is more likely to remain in the second area 101b and the third area 102a during the preparation process.

[0098] In some embodiments, referring to FIG. 4 b , which is another schematic cross-sectional view of the structure along the BB′ section line in FIG. 2 a , the inorganic dielectric layer 22 and the second protective layer 5 are further located in the fourth region 102 b .

[0099] In some embodiments, referring to Figures 4a, 4b, 2c, 3b and 3c, the intermediate dielectric layer 14 also extends to the first area 101a, and a plurality of grooves 140 are provided in the portion of the intermediate dielectric layer 14 located in the first area 101a. The plurality of grooves 140 are located on the side of the intermediate dielectric layer 14 facing away from the substrate 10; the plurality of grooves 140 are distributed along the arrangement direction of the display area 100 and the first area 101a.

[0100] Among them, a groove 140 is opened in the part of the intermediate dielectric layer 14 located in the first area 101a, and the groove 140 can be filled with the first layer 16, the first protective layer 3 or the second protective layer 5. Since the first layer 16, the first protective layer 3 and the second protective layer 5 are all made of organic materials and have a certain flexibility, the organic material combined with the groove 140 can effectively prevent the cutting stress during the subsequent cutting of the area to be cut 102 from causing the intermediate dielectric layer 14 to break, thereby further preventing the cracks in the intermediate dielectric layer 14 from being transmitted to the display area 100, thereby ensuring the quality of the intermediate panel.

[0101] In some embodiments, referring to Figure 3a, the intermediate panel also includes at least one first film layer 19, which is sequentially stacked on the side of the first protective layer 3 facing away from the display substrate 1, and at least one first film layer 19 covers the display substrate 1, and at least one first film layer 19 is adapted to the surface shape of the contact between the first protective layer 3 and the display substrate 1.

[0102] In some embodiments, the first film layer 19 comprises an optical management film layer and / or a protective cover, and the optical management film layer comprises a light extraction layer.

[0103] In some embodiments, referring to FIG. 2 a , the border area further includes a binding area 103, which is located outside one side of the display area 100. The binding area 103, the reserved area 101, and the area to be cut 102 are respectively located in different side border areas outside the display area 100. For example, the reserved area 101 and the area to be cut 102 are located in the first, second, and third side border areas outside the display area 100, and the binding area 103 is located in the fourth side border area outside the display area 100.

[0104] The intermediate panel provided by the embodiment of the present disclosure can avoid contact between the first protective layer 3 and the inorganic dielectric layer 22 remaining in the second and third areas 101b, 102a by extending the first protective layer 3 from the display area 100 to the first area 101a. That is, the orthographic projections of the first protective layer 3 on the display substrate 1 do not overlap. This prevents the first protective layer 3 from coming into contact with the inorganic dielectric layer 22 remaining in the second and third areas 101b, 102a. This prevents peeling between the first protective layer 3 and the inorganic dielectric layer 22 remaining in the second and third areas 101b, 102a when the protective films covering other film layers are subsequently removed, thereby preventing the first protective layer 3 from being torn off, thereby ensuring the quality of the intermediate panel.

[0105] In the second aspect, the embodiment of the present disclosure further provides a display panel, referring to Figure 2b and Figure 5a, Figure 5a is a cross-sectional schematic diagram of a border area of ​​a display panel in the embodiment of the present disclosure; wherein, the display panel has a display area 100 and a border area, the border area is arranged around the periphery of the display area 100, the border area includes a first area 101a and a second area 101b, and the first area 101a and the second area 101b are distributed away from the display area 100 in sequence; the display panel includes a display substrate 1, a touch layer 2, a color film layer 4 and a first protective layer 3, the touch layer 2, the color film layer 4 and the first protective layer 3 are stacked in sequence on the display side of the display substrate 1, the touch layer 2 includes a metal layer 21 and an inorganic dielectric layer 22, the thickness h1 of the display substrate 1 in the second area 101b is less than the thickness h2 of the display substrate 1 in the first area 101a; the first protective layer 3 extends from the display area 100 to the first area 101a.

[0106] The display panel in this embodiment is formed by cutting and removing the to-be-cut area of ​​the middle panel in the above embodiment.

[0107] In some embodiments, referring to Figures 3a and 5b, Figure 5b is a cross-sectional schematic diagram of another display panel border area in an embodiment of the present disclosure; wherein, the display panel is further covered with a second protective layer 5, which is located between the touch layer 2 and the color film layer 4, and the second protective layer 5 extends from the display area 100 to the first area 101a.

[0108] In some embodiments, referring to Figure 5b, the inorganic dielectric layer 22 extends from the display area 100 to the first area 101a. In the first area 101a, the orthographic projection of the first protective layer 3 on the display substrate 1 covers the orthographic projection boundary of the inorganic dielectric layer 22 and the second protective layer 5 on the display substrate 1.

[0109] In some embodiments, referring to FIG. 5 b , in the first region 101 a , the orthographic projection of the second protection layer 5 on the display substrate 1 covers the orthographic projection boundary of the inorganic dielectric layer 22 on the display substrate 1 .

[0110] In some embodiments, referring to Figure 5c, which is a cross-sectional schematic diagram of another display panel border area in an embodiment of the present disclosure; wherein, in the first area 101a, the orthographic projection boundary of the second protective layer 5 on the display substrate 1 is located on the side of the orthographic projection boundary of the inorganic medium layer 22 on the display substrate 1 close to the display area 100.

[0111] In some embodiments, the inorganic dielectric layer 22 still remains in the second region 101 b , and the first protective layer 3 and / or the second protective layer 5 do not overlap with the second region 101 b .

[0112] In some embodiments, referring to Figures 2b and 3a, the display substrate 1 includes a base 10, a driving circuit 11 and a light-emitting device 12. The driving circuit 11 and the light-emitting device 12 are stacked in sequence on the side of the base 10 close to the touch layer 2. The driving circuit 11 includes multiple conductive layers stacked in sequence. An inorganic insulating layer is provided between any two adjacent conductive layers close to the base 10, and an organic insulating layer is provided between any two adjacent conductive layers away from the base 10. The light-emitting device 12 is located in the display area 100. The base 10 extends from the display area 100 to the frame area. Multiple conductive layers, inorganic insulating layers and organic insulating layers are located in the display area 100, and at least part of the inorganic insulating layer also extends to the first area 101a.

[0113] In some embodiments, referring to FIG. 5 a and FIG. 5 b , a portion of the organic insulating layer is also located in the second region 101 b .

[0114] In some embodiments, referring to Figures 5a-5c, the inorganic insulating layer includes an intermediate dielectric layer 14, which also extends to the first area 101a. A plurality of grooves 140 are provided in a portion of the intermediate dielectric layer 14 located in the first area 101a. The plurality of grooves 140 are located on a side of the intermediate dielectric layer 14 facing away from the substrate 10; the plurality of grooves 140 are distributed along the arrangement direction of the display area 100 and the first area 101a.

[0115] In some embodiments, referring to Figures 5a-5c, the display panel also includes at least one first film layer 19, which is sequentially stacked on the side of the first protective layer 3 facing away from the display substrate 1, and at least one first film layer 19 covers the display substrate 1, and at least one first film layer 19 is adapted to the shape of the contact surface of the first protective layer 3 and the display substrate 1.

[0116] In some embodiments, the first film layer 19 includes an optical processing film layer and / or a protective cover.

[0117] The display panel provided in the embodiment of the present disclosure is formed by cutting the intermediate panel in the above embodiment and removing the area to be cut, thereby ensuring the preparation quality and display quality of the display panel.

[0118] In a third aspect, an embodiment of the present disclosure further provides a display module, comprising the display panel in the above embodiment.

[0119] By adopting the display panel in the above embodiment, the manufacturing quality and display quality of the display module are ensured.

[0120] The display module provided in the embodiments of the present disclosure may be any product or component with a display function, such as an OLED panel, an OLED TV, an OLED billboard, a display, a mobile phone, or a navigation system.

[0121] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display panel, wherein: It has a display area and a frame area, wherein the frame area is arranged around the periphery of the display area. The frame area includes a first area and a second area, and the first area and the second area are sequentially distributed away from the display area; The display panel includes a display substrate, a touch layer, a color filter layer and a first protective layer, wherein the touch layer, the color filter layer and the first protective layer are sequentially stacked on the display side of the display substrate. The touch layer includes a metal layer and an inorganic dielectric layer. The thickness of the display substrate in the second area is smaller than the thickness of the display substrate in the first area; The first protection layer extends from the display area to the first area.

2. The display panel according to claim 1, wherein A second protective layer is also included, located between the touch layer and the color filter layer. The second protection layer extends from the display area to the first area.

3. The display panel according to claim 2, wherein: The inorganic dielectric layer extends from the display area to the first area, In the first region, the orthographic projection of the first protective layer on the display substrate covers the boundary between the inorganic medium layer and the orthographic projection of the second protective layer on the display substrate.

4. The display panel according to claim 3, wherein: In the first region, the orthographic projection of the second protection layer on the display substrate covers the orthographic projection boundary of the inorganic medium layer on the display substrate.

5. The display panel according to claim 3, wherein: In the first area, an orthographic projection boundary of the second protection layer on the display substrate is located on a side of an orthographic projection boundary of the inorganic medium layer on the display substrate close to the display area.

6. The display panel according to any one of claims 2 to 5, wherein: The first protective layer and / or the second protective layer do not overlap with the second region.

7. The display panel according to any one of claims 1 to 5, wherein: The display substrate includes a base, a driving circuit and a light-emitting device, wherein the driving circuit and the light-emitting device are sequentially stacked on a side of the base close to the touch layer. The driving circuit includes a plurality of conductive layers stacked in sequence, an inorganic insulating layer is provided between any two adjacent conductive layers in a portion close to the substrate, and an organic insulating layer is provided between any two adjacent conductive layers in a portion away from the substrate. The light emitting device is located in the display area, The substrate extends from the display area to the frame area, The plurality of conductive layers, the inorganic insulating layer and the organic insulating layer are located in the display area, At least a portion of the inorganic insulating layer also extends to the first region.

8. The display panel according to claim 7, wherein: Part of the organic insulating layer is also located in the second region.

9. The display panel according to claim 8, wherein: The inorganic insulating layer includes an intermediate dielectric layer, and the intermediate dielectric layer further extends to the first region. A plurality of grooves are formed in a portion of the intermediate dielectric layer located in the first region, and the plurality of grooves are located on a side of the intermediate dielectric layer facing away from the substrate; The plurality of grooves are distributed along an arrangement direction of the display area and the first area.

10. The display panel according to any one of claims 1-5, 8-9, wherein: It also includes at least one first film layer, which is sequentially stacked on a side of the first protective layer away from the display substrate. The at least one first film layer covers the display substrate, and the at least one first film layer is adapted to the shapes of surfaces in contact with the first protective layer and the display substrate.

11. The display panel according to claim 10, wherein: The first film layer includes an optical processing film layer and / or a protective cover plate.

12. An intermediate panel, wherein: It has a display area and a frame area, wherein the frame area is arranged around the periphery of the display area. The frame area includes a reserved area and an area to be cut, and the reserved area and the area to be cut are sequentially distributed away from the display area; The reserved area includes a first area and a second area, the area to be cut includes a third area and a fourth area, and the first area, the second area, the third area and the fourth area are sequentially distributed away from the display area; The intermediate panel includes a display substrate, a touch layer, a color filter layer and a first protective layer, wherein the touch layer, the color filter layer and the first protective layer are sequentially stacked on the display side of the display substrate. The touch layer includes a stacked metal layer and an inorganic dielectric layer. The metal layer and the color filter layer are located in the display area; The inorganic dielectric layer extends from the display area to the first area, The thickness of the display substrate in the second area and the third area is smaller than the thickness of the display substrate in the first area and the fourth area; The first protection layer extends from the display area to the first area.

13. The intermediate panel according to claim 12, wherein: A second protective layer is also included, located between the touch layer and the color filter layer. The second protection layer extends from the display area to the first area.

14. The intermediate panel according to claim 13, wherein: The inorganic dielectric layer also remains in the second region and the third region; The first protection layer and the second protection layer do not overlap with the second region and the third region.

15. A display module, wherein: The display panel comprises the display panel according to any one of claims 1 to 11.

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