Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display area and a non-display area located around the display area. The display panel further comprises a substrate, a plurality of dams and an organic packaging layer. The multiple dams are arranged on one side of the substrate, the multiple dams are arranged at intervals in the first direction, at least one dam is located in the display area, and the first direction is the direction from the display area to the non-display area; and the organic packaging layer is arranged on one side of the substrate and extends into a gap between two adjacent dams from one side, far away from the non-display area, of the multiple dams. According to the scheme, the frame width can be effectively reduced, and the display effect and the packaging effect are ensured.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) and flat display panels based on technologies such as Light Emitting Diode (LED) are widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display panels.

[0003] However, the borders of current OLED display products are still relatively wide. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a display panel that effectively reduces the border width and ensures the display effect and packaging effect.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a display panel, comprising a display area and a non-display area located around the display area; the display panel also comprises: a substrate, a plurality of dams and an organic encapsulation layer; a plurality of the dams are arranged on one side of the substrate, and a plurality of the dams are arranged at intervals along a first direction, and at least one of the dams is located in the display area, wherein the first direction is the direction from the display area to the non-display area; the organic encapsulation layer is arranged on one side of the substrate, and extends from a side of the plurality of the dams away from the non-display area to the interval between two adjacent dams.

[0006] Preferably, along the first direction, the distance from the surface of the plurality of dams on the side facing away from the substrate to the substrate first decreases and then increases.

[0007] Preferably, the dam closest to the edge of the display panel is defined as a first dam, and the other dams are defined as second dams, wherein the distance from the surface of the first dam facing away from the substrate to the substrate is greater than or equal to the distance from the surface of the second dam facing away from the substrate to the substrate.

[0008] Preferably, a distance from a surface of the dam facing away from the substrate to the substrate is less than or equal to 5 μm.

[0009] Preferably, the width of the dam in the first direction is 20-30 μm.

[0010] Preferably, the material of the plurality of dams is the same.

[0011] Preferably, all of the second dams are located in the display area.

[0012] Preferably, there are a plurality of second dams, and the distances from the surfaces of the plurality of second dams arranged sequentially in the first direction that are away from the substrate to the substrate gradually decrease.

[0013] Preferably, the height difference between two adjacent second dams is 0.8-1.2 μm.

[0014] Preferably, the dam is arranged around the edge of the display area.

[0015] Preferably, the first dam is located on a boundary line between the display area and the non-display area.

[0016] Preferably, the orthographic projection of the first dam on the substrate at least touches the outer boundary of the orthographic projection of the display area on the substrate.

[0017] Preferably, the display panel also includes a pixel definition layer located on a side of the substrate facing the dam, the pixel definition layer being provided with a plurality of spaced-apart pixel openings, and light-emitting units being provided in the pixel openings; at least a portion of the dam is provided on a side of the pixel definition layer facing away from the substrate, and an orthographic projection of the dam on the pixel definition layer is located outside the pixel openings.

[0018] Preferably, in the first direction, the pixel definition layer between two adjacent dams is provided with 3-5 pixel openings.

[0019] Preferably, the distance between two adjacent dams arranged on the side of the pixel definition layer away from the substrate is 80-120 μm.

[0020] Preferably, the display panel further comprises an inorganic encapsulation layer, which is arranged between the organic encapsulation layer and the substrate, and / or arranged on a side of the organic encapsulation layer away from the substrate.

[0021] Preferably, the orthographic projection of the inorganic encapsulation layer on the substrate covers the orthographic projections of the plurality of dams on the substrate.

[0022] Preferably, the inorganic encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, the first inorganic encapsulation layer is arranged between the organic encapsulation layer and the substrate, and the second inorganic encapsulation layer is arranged on the side of the organic encapsulation layer away from the substrate, wherein the first inorganic encapsulation layer and the second inorganic encapsulation layer both extend to the side where the multiple dams face the non-display area, and the first inorganic encapsulation layer and the second inorganic encapsulation layer extending to the side where the multiple dams face the non-display area are in contact and connected.

[0023] Preferably, the number of the dams is 3 to 6. To solve the above technical problem, another technical solution adopted by the present application is to provide a display device, including the display panel in any embodiment.

[0024] The beneficial effects of the present application are as follows: Different from the prior art, at least one of the multiple dams in the display panel provided by the present application is arranged in the display area, wherein the dams located in the display area of ​​the display panel can slow down the overflow speed of the organic encapsulation layer, while allowing the height of the organic encapsulation layer between the dams to be reduced toward the non-display area, and the slope of the organic encapsulation layer is relatively gentle, which reduces the problem of optical distortion caused by refraction of light when passing through the organic encapsulation layer. Since at least one dam is arranged in the display area, the space occupied by the dam in the non-display area is reduced, thereby narrowing the frame while ensuring the display effect. The dam farthest from the display area can effectively prevent the organic encapsulation layer from crossing the dam, preventing the organic encapsulation layer from overflowing, thereby preventing water and oxygen from invading and ensuring the encapsulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of an embodiment of a display panel of the present application;

[0026] Figure 2 yes Figure 1 Cross-sectional view along the BB direction;

[0027] Figure 3 is a schematic structural diagram of another embodiment of a display panel of the present application;

[0028] Figure 4 yes Figure 3 Sectional view along CC direction;

[0029] Figure 5 It is a cross-sectional view of an embodiment of a display panel of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] See also Figure 1 and Figure 2 , Figure 1 It is a schematic structural diagram of an embodiment of a display panel of the present application. Figure 2 yes Figure 1The display panel 10 includes a display area AA and a non-display area NA located around the display area AA; the display panel 10 also includes a substrate 11, a plurality of dams 14 and an organic encapsulation layer 152. The plurality of dams 14 are arranged on one side of the substrate 11, and the plurality of dams 14 are arranged at intervals along a first direction X, and at least one dam is arranged in the display area AA, wherein the first direction X is the direction from the display area AA to the non-display area NA; the organic encapsulation layer 152 is arranged on one side of the substrate 11, and extends from the inner side of the plurality of dams 14 to the interval between two adjacent dams 14.

[0032] Specifically, in the present embodiment, the display panel 10 may further include an array layer 12, which is stacked on one side of the substrate 11. The array layer 12 includes a plurality of anodes 121 arranged at intervals. The anodes 121 are located in the display area AA. A pixel definition layer 13 is provided on the side of the array layer 12 away from the substrate 11. A plurality of pixel openings 131 are provided on the pixel definition layer 13. The pixel openings 131 are located in the display area AA and are arranged one-to-one with the anodes 121. The anodes 121 are exposed from the pixel openings 131. A light-emitting functional layer 122 is also provided in the pixel openings 131. A cathode (not shown) is provided on the side of the light-emitting functional layer 122 away from the anode. The anode 121, the light-emitting functional layer 122 and the cathode form a light-emitting unit. Two dams 14 are provided on the side of the array layer 12 away from the substrate 11, such as Figure 1 As shown, the positive projection of the dam 14 on the substrate 11 is annular, one dam 14 is arranged in the display area AA, and the other dam 14 is arranged in the non-display area NA. The pixel unit, the pixel definition layer 13, and the side of the dam 14 facing away from the substrate 11 are provided with an encapsulation layer 15, and the encapsulation layer 15 includes a first inorganic encapsulation layer 151, an organic encapsulation layer 152, and a second inorganic encapsulation layer 153 which are stacked in sequence. The first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 both extend from the inside of the dam 14 to the outside and cover all the dams 14, and extend to the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 on the side away from the display area AA of multiple dams 14, and are in contact and connected, and the organic encapsulation layer 152 extends from the side of the dam 14 facing the display area AA to the side away from the display area AA and ends at the dam 14 farthest from the display area AA.

[0033] The organic material of the organic encapsulation layer 152 has high fluidity and poor water and oxygen blocking ability. The dam 14 is used to prevent the organic material from overflowing and reduce the probability of water and oxygen intrusion. At least one of the multiple dams 14 of the present application is arranged in the display area AA, wherein the dam 14 located in the display area AA of the display panel 10 slows down the overflow speed of the organic encapsulation layer 152, while allowing the height of the organic encapsulation layer 152 between the dams 14 to be reduced toward the direction of the non-display area NA, so that the slope of the leveling area of ​​the organic encapsulation layer 152 located at the edge of the display panel 10 is relatively gentle, reducing the probability of refraction of light when passing through the organic encapsulation layer 152, and reducing the probability of optical distortion caused by optical refraction. Since at least one dam 14 is arranged in the display area AA, the space occupied by the dam 14 in the non-display area NA is reduced, thereby narrowing the frame while ensuring the display effect. The dam 14 farthest from the display area AA can effectively prevent the organic encapsulation layer 152 from crossing the dam 14, preventing the organic encapsulation layer 152 from overflowing, thereby preventing water and oxygen intrusion and ensuring the encapsulation effect.

[0034] See also Figure 3 and Figure 4 , Figure 3 is a schematic structural diagram of another embodiment of the display panel 10 of the present application, Figure 4 yes Figure 3 In this example, along the first direction X, the distance between the surface of the plurality of dams 14 facing away from the substrate 11 and the substrate 11 first decreases and then increases. This allows the height of the organic encapsulation layer 152 between the dams 14 to gradually decrease along the first direction X, reducing the height difference of the organic encapsulation layer 152 between the dams 14, so that the organic encapsulation layer 152 can be gradually leveled at a shorter distance under the obstruction of the plurality of dams 14, further reducing the problem of optical distortion caused by refraction of light when passing through the organic encapsulation layer.

[0035] Optionally, continue to Figure 2 and Figure 4 , the dam 14 closest to the edge of the display panel 10 is defined as the first dam 141, and the other dams 14 are defined as the second dam 142, wherein the distance from the surface of the first dam 141 facing away from the substrate 11 to the substrate 11 is greater than or equal to the distance from the surface of the second dam 142 facing away from the substrate 11 to the substrate 11. The first dam 141 is the dam 14 closest to the edge of the display panel 10, and is the highest dam 14 among the multiple dams 14. As the last line of defense, it can prevent the organic encapsulation layer 152 from overflowing. The other multiple dams 14 located inside the first dam 141 are all second dams 142, which are used to slow down the slope of the leveling area of ​​the organic encapsulation layer 152.

[0036] Optionally, the distance between the surface of the dam 14 facing away from the substrate 11 and the substrate 11 is less than or equal to 5 μm. Specifically, the distance between the surface of the dam 14 facing away from the substrate 11 and the substrate 11 can be 3 μm, 4 μm, 5 μm, etc., wherein the distance between the surface of the first dam 141 facing away from the substrate 11 and the substrate 11 can be 5 μm, the height of the second dam 142 can be 3 μm, 4 μm, etc., and the width of the dam 14 in the first direction X is 20-30 μm (for example, 23 μm, 25 μm or 28 μm). Optionally, the material of the plurality of dams 14 is the same. Specifically, the plurality of dams 14 can be made of transparent photoresist.

[0037] Optionally, there are multiple second dams 14, and in the first direction X, the distance from the surface of the multiple second dams 142 facing away from the substrate 11 to the substrate 11 gradually decreases. The second dams 142 with gradually decreasing heights are used to gradually slow down the slope of the organic material layer, and the distance from the surface of the first dam 141 located on the side of the second dam 142 away from the display area AA to the substrate 11 is greater than the second dam 142, which plays a role in preventing the organic encapsulation layer 152 from overflowing. Only one first dam 141 is provided, which can further reduce the width of the frame. Optionally, the height difference between the surfaces of two adjacent second dams 142 facing away from the substrate 11 is 0.8-1.2μm (for example, 1μm). For example, the number of the second dams 142 is 2, and the total number of the dams 14 is 3. Along the first direction X, the distances from the surfaces of the three dams 14 facing away from the substrate 11 to the substrate 11 can be 4μm, 3μm, and 5μm, respectively.

[0038] In other embodiments, the distances from the surface of two or more adjacent second dams 142 facing away from the substrate 11 to the substrate 11 may also be the same. For example, the number of second dams 142 is 3, the total number of dams 14 is 4, and along the first direction X, the distances from the surface of the four dams 14 facing away from the substrate 11 to the substrate 11 may be 4 μm, 3 μm, 3 μm, and 5 μm, respectively. The height difference between the distances from the surface of the side facing away from the substrate 11 to the substrate 11 between any two adjacent second dams 142 may be the same or different, and this application does not make any specific restrictions.

[0039] In this embodiment, the dam 14 located in the display area AA can be arranged on the side of the pixel definition layer 13 facing away from the substrate 11, and the orthographic projection of the dam 14 on the pixel definition layer 13 is located outside the pixel opening 131. The dam 14 is arranged on the pixel definition layer 13 to avoid blocking the light emitted by the sub-pixel. Since at least part of the dam 14 is located in the display area AA, the organic encapsulation layer 152 is at least partially leveled in the display area AA, that is, at least part of the leveling area of ​​the organic encapsulation layer 152 is located in the display area AA, which can reduce the space reserved for the leveling area in the non-display area NA, thereby reducing the width of the non-display area NA, i.e., the frame.

[0040] In such Figure 3 and Figure 4 In the embodiment shown, the dam 14 of the present application can be prepared and formed according to the following steps:

[0041] First, after the anode 122 of the array layer 12 is formed on one side of the substrate 11, a pixel definition layer 13 is formed on the side of the array layer 12 facing away from the substrate 11, and a plurality of spaced pixel openings 131 are formed on the pixel definition layer 13 by exposure, so that the anode 121 in the array layer 12 is exposed in the pixel opening 131.

[0042] A plurality of dams 14 are formed on the side of the pixel definition layer 13 facing away from the substrate 11 and the side of the array layer 12 facing away from the substrate, wherein the orthographic projection of the dam 14 on the pixel definition layer 13 is located outside the pixel opening 131, and the orthographic projection of the dam 14 on the substrate 11 is annular. The orthographic projections of the first dam 141 and the second dam 142 on the substrate 11 are both annular, the first dam 141 surrounds the outside of the display area AA, and the second dam 142 is along the edge inside the display area AA.

[0043] After the light-emitting functional layer 122 is evaporated in the pixel opening 131 and the cathode layer is formed, a first inorganic encapsulation layer 151 is formed as a whole layer on the side of the cathode layer, the pixel definition layer 13 and the dam 14 facing away from the substrate, and the first inorganic encapsulation layer 151 extends to the edge of the display panel 10; an organic encapsulation layer 152 is formed on the side of the first inorganic encapsulation layer 151 facing away from the substrate 11, and the organic encapsulation layer 152 extends outward from the inside of the dam 14, fills the gap between two adjacent dams 14, and ends at the side of the outermost dam 14 facing the display area AA; a second inorganic encapsulation layer 153 is formed as a whole layer on the side of the organic encapsulation layer 152 facing away from the substrate 11, and the second inorganic encapsulation layer 153 extends to the edge of the display panel 10 and is in contact with and connected to the first inorganic encapsulation layer 151.

[0044] Optionally, continue to Figure 3 and Figure 4 In this embodiment, all the second dams 142 are located in the display area AA to further reduce the frame width.

[0045] Optionally, continue to Figure 3 and Figure 4 In this embodiment, the first dam 141 is located at the boundary line between the display area AA and the non-display area NA. The dam 14 closest to the edge of the display panel 10, i.e., the first dam 141, is located at the boundary line between the display area AA and the non-display area NA. It should be noted that the orthographic projection of the first dam 141 on the substrate at least touches the outer boundary of the orthographic projection of the display area AA on the substrate. Figure 5 As shown in FIG. 1 , the left edge of the first dam 141 is connected to the outer edge of the display area AA, so that the edge of the organic encapsulation layer 152 ends in the display area AA, and the leveling area of ​​the organic encapsulation layer 152 is completely located in the display area AA. Since the height of the second dam 142 decreases along the first direction X, the slope of the leveling area of ​​the organic encapsulation layer 152 becomes gentle, and the light emitted from the display area AA is not easily refracted after passing through the leveling area, and remains substantially parallel to the light emitted from other areas of the organic encapsulation layer 152 (e.g., Figure 4 As shown by the middle arrow, the probability of optical distortion or optical crosstalk in the area is reduced, thereby ensuring the display effect. At the same time, since the edgemost dam 14 is also connected to the outer boundary of the display area AA, the non-display area NA does not need more space to set the dam 14, which can further reduce the border.

[0046] In other embodiments, the first bank 141 may also be completely located in the non-display area NA, or the first bank 141 and a portion of the second bank 142 may be located in the non-display area NA.

[0047] Optionally, continue to Figure 4 , in the first direction X, the pixel definition layer 13 between two adjacent dams 14 is provided with 3-5 pixel openings 131. The distance between two adjacent dams 14 in the first direction X is greater than the width of the 3-5 pixel openings 131, so that there is a sufficient width between two adjacent dams 14, which is convenient for the dams 14 to be formed on the pixel definition layer 13 on the one hand, and the dams 14 are not easy to block the light from the pixel openings 131 on the other hand, thereby ensuring the display effect. Specifically, the distance between two adjacent dams 14 arranged on the side of the pixel definition layer 13 away from the substrate 11 is 80-120 μm (for example, it can be 100 μm).

[0048] Optionally, the number of the dams 14 is 3-6, which can prevent the organic encapsulation layer 152 from overflowing and effectively reduce the slope of the leveling area of ​​the organic encapsulation layer 152 to ensure the display effect and reduce the width of the frame of the display panel 10.

[0049] The present application also provides a display device, including the display panel 10 in any of the above embodiments. The display device can be a mobile phone, a tablet computer, a wearable smart device, etc. The display device with the above display panel 10 has a narrow frame, which increases the display area while ensuring a better display effect.

[0050] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a non-display area around the display area; the display panel also includes: substrate; A plurality of dams are arranged on one side of the substrate, the plurality of dams are arranged at intervals along a first direction, at least one of the dams is located in the display area, wherein the first direction is a direction from the display area to the non-display area; The organic encapsulation layer is disposed on one side of the substrate and extends from one side of the plurality of dams away from the non-display area to the space between two adjacent dams.

2. The display panel according to claim 1, characterized in that: Along the first direction, the distance from the surface of the plurality of dams facing away from the substrate to the substrate first decreases and then increases.

3. The display panel according to claim 2, characterized in that: The dam closest to the edge of the display panel is defined as a first dam, and the other dams are defined as second dams, wherein the distance from the surface of the first dam facing away from the substrate to the substrate is greater than or equal to the distance from the surface of the second dam facing away from the substrate to the substrate; Preferably, the distance from the surface of the dam facing away from the substrate to the substrate is less than or equal to 5 μm; Preferably, the width of the dam in the first direction is 20-30 μm; Preferably, the material of the plurality of dams is the same; Preferably, all of the second dams are located in the display area.

4. The display panel according to claim 3, characterized in that: The number of the second dams is plural, and the distances from the surfaces of the second dams arranged sequentially in the first direction facing away from the substrate to the substrate gradually decrease; Preferably, the height difference between two adjacent second dams is 0.8-1.2 μm.

5. The display panel according to claim 1, characterized in that: The dam is arranged around the edge of the display area.

6. The display panel according to claim 5, characterized in that: The first dam is located at a boundary line between the display area and the non-display area; Preferably, the orthographic projection of the first dam on the substrate at least touches the outer boundary of the orthographic projection of the display area on the substrate.

7. The display panel according to claim 4, characterized in that: Also includes: A pixel definition layer is located on a side of the substrate facing the dam, the pixel definition layer is provided with a plurality of pixel openings arranged at intervals, and light-emitting units are provided in the pixel openings; At least a portion of the dam is disposed on a side of the pixel definition layer facing away from the substrate, and an orthographic projection of the dam on the pixel definition layer is located outside the pixel opening.

8. The display panel according to claim 7, characterized in that: In the first direction, the pixel definition layer located between two adjacent dams is provided with 3-5 pixel openings; Preferably, the distance between two adjacent dams arranged on the side of the pixel definition layer away from the substrate is 80-120 μm.

9. The display panel according to claim 1, characterized in that: The display panel further includes: an inorganic encapsulation layer, disposed between the organic encapsulation layer and the substrate, and / or disposed on a side of the organic encapsulation layer away from the substrate; Preferably, the orthographic projection of the inorganic encapsulation layer on the substrate covers the orthographic projections of the plurality of dams on the substrate; Preferably, the inorganic encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, the first inorganic encapsulation layer is arranged between the organic encapsulation layer and the substrate, and the second inorganic encapsulation layer is arranged on a side of the organic encapsulation layer away from the substrate, wherein the first inorganic encapsulation layer and the second inorganic encapsulation layer both extend to a side of the plurality of dams facing the non-display area, and the first inorganic encapsulation layer and the second inorganic encapsulation layer extending to a side of the plurality of dams facing the non-display area are in contact and connection; Preferably, the number of the dams is 3-6.

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

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