Display panel and display device

Abstract

The application discloses a display panel and a display device, wherein the display panel comprises a screen body, an encapsulation cover plate and optical glue, the screen body comprises a first display area and a second display area located at the periphery of the first display area, and the light transmittance of the first display area is greater than that of the second display area; wherein the first display area is provided with a fence adjacent to the edge of the second display area; the encapsulation cover plate is arranged on the side of the screen body provided with the fence, and the fence, the screen body located on both sides of the fence and the encapsulation cover plate are combined to form a first cavity at the position of the first display area; and the optical glue is located in the first cavity. Through the above scheme, the light transmittance of the under-screen camera area of the display panel is increased, and the shooting effect of the camera is improved.

Description

Technical Field

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

[0002] With the development of display technology, under-screen camera technology is maturing. Display panels using under-screen camera technology are divided into a transparent display area and a normal display area. The transparent display area serves as the under-screen camera area. A front-facing camera is located below the transparent display area. Because its light transmittance is greater than that of the normal display area, light can pass through the transparent display area to the front-facing camera, enabling front-facing photography. Furthermore, the transparent display area can display content alongside the surrounding normal display area, achieving a truly full-screen display.

[0003] Existing rigid under-display camera display panels have a spacer between the encapsulation cover and the screen to protect the screen's luminescent material. As light passes through the encapsulation cover, spacer, and screen to reach the camera, it reflects and refracts at the interfaces between the encapsulation cover and spacer, and between the spacer and screen. This reduces the screen's light transmittance and also generates a significant amount of stray light, which degrades the front-facing camera's image quality. Summary of the Invention

[0004] The main technical problem solved by this application is to provide a display panel and a display device to increase the light transmittance of the camera area under the screen and improve the shooting effect of the camera.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a display panel, including a screen body, a packaging cover plate and optical glue, the screen body including a first display area and a second display area located outside the first display area, and the transmittance of the first display area is greater than the transmittance of the second display area; wherein, the first display area is provided with a fence adjacent to the edge of the second display area; the packaging cover plate is provided on the side of the screen body where the fence is provided, and the fence and the screen body and the packaging cover plate located on both sides of the fence are combined to form a first cavity at the position of the first display area; the optical glue is located in the first cavity.

[0006] In order to solve the above technical problems, a technical solution adopted in this application is: to provide a display device, comprising a display panel and a front camera as described in any embodiment, wherein the front camera is arranged on the side of the screen body away from the packaging cover plate, and the orthographic projection of the front camera on the screen body is located within the first display area.

[0007] The beneficial effects of the present application are as follows: different from the prior art, the display panel and display device of the present application are provided with a fence at the edge of the first display area for under-screen camera. Since the fence and the screen bodies on both sides and the packaging cover plate enclose the first display area to form a closed first cavity, and the first cavity is filled with optical glue, and the degree of reflection and refraction between the optical glue and the packaging cover plate, as well as between the optical glue and the screen body is low, the transmittance of at least part of the first display area is enhanced, and the stray light in the area is reduced, thereby improving the shooting effect of the camera; and the setting of the fence, on the one hand, prevents the optical glue from overflowing the first display area and reduces the impact on the display of the second display area, and on the other hand, reduces the amount of optical glue used, reduces the probability of its released gas polluting the light-emitting element, thereby affecting the life of the display panel, and in addition, the fence reduces the fluidity of the optical glue, thereby ensuring the transmittance of the first display area and the shooting effect of the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of an embodiment of a display panel of the present application;

[0009] Figure 2 is a partial cross-sectional view of an embodiment of a display panel of the present application;

[0010] Figure 3 is a schematic diagram of a partial structure of an embodiment of a display panel of the present application;

[0011] Figure 4 is a partial cross-sectional view of another embodiment of the display panel of the present application;

[0012] Figure 5 is a partial structural diagram of another embodiment of the display panel of the present application;

[0013] Figure 6 It is a structural diagram of another embodiment of the display panel of the present application. DETAILED DESCRIPTION

[0014] To make the objectives, technical solutions, and effects of this application more clear and explicit, the present application is further described in detail below with reference to the accompanying drawings and examples. Obviously, the described examples are only some of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] See Figure 1 , Figure 1This is a schematic diagram of the structure of an embodiment of the display panel of the present application. The display panel of the present application includes a transparent display area a and a normal display area b. A front-facing camera is provided on the side of the transparent display area a facing away from the display surface. External light can pass through the transparent display area a to reach the front-facing camera for shooting. Both the transparent display area a and the surrounding normal display area b can display content. There is no need to dig a hole in the camera area, which increases the screen-to-body ratio and realizes a true full-screen display. The display panel of the present application can be used in display devices such as mobile phones, tablets, and wearable devices.

[0016] See Figure 2 , Figure 2 This is a partial cross-sectional view of an embodiment of the display panel of the present application. Figure 1 The display panel of the present application includes a screen body 1, a packaging cover plate 4 and an optical adhesive 3. The screen body 1 includes a first display area 1a and a second display area 1b located outside the first display area 1a. The first display area 1a corresponds to Figure 1 The transparent display area a in the second display area 1b corresponds to Figure 1 In the normal display area b, the front camera 6 is arranged on the side of the first display area 1a away from the packaging cover 4, and the transmittance of the first display area 1a is greater than the transmittance of the second display area 1b, wherein a barrier 2 is provided at the edge of the first display area 1a adjacent to the second display area 1b.

[0017] The encapsulation cover plate 4 is positioned over the side of the screen 1 where the enclosure 2 is located. The enclosure 2, the screen 1 on either side of the enclosure 2, and the encapsulation cover plate 4, together enclose a first cavity 21 in the first display area 1a. Specifically, the encapsulation cover plate 4 can be made of glass. The top of the enclosure 2 is bonded to the bottom of the encapsulation cover plate 4, and the bottom is fixed to the screen 1. Optical adhesive 3 is located within the first cavity 21. Optical adhesive 3 can be transparent optical adhesive (OCA) or transparent optical resin (OCR).

[0018] The display panel of the present application is provided with a barrier 2 at the edge of the first display area 1a used for under-screen camera. Since the barrier 2 and the screen body 1 and the packaging cover plate 4 on both sides thereof enclose a closed first cavity 21 in the first display area 1a, and the first cavity 21 is filled with optical glue 3, and the reflection and refraction between the optical glue 3 and the packaging cover plate 4, as well as between the optical glue 3 and the screen body 1 are low, the transmittance of the first display area 1a filled with the optical glue 3 is enhanced, and the stray light in this area is reduced, thereby improving the shooting effect of the front camera below; and the setting of the barrier 2, on the one hand, prevents the optical glue 3 from overflowing the first display area 1a and reduces the impact on the display of the second display area 1b; on the other hand, it limits the optical glue 3 to the first cavity 21, reduces the use of the optical glue 3, and reduces the probability of its released gas polluting the light-emitting elements on the screen body 1, thereby affecting the life of the display panel. In addition, the barrier 2 reduces the fluidity of the optical glue 3, thereby ensuring the transmittance of the first display area 1a and the shooting effect of the camera.

[0019] Optionally, in this embodiment, the screen 1 includes a substrate 11, an array layer 12, and a light-emitting layer 13, which are stacked in sequence. The light-emitting layer 13 in the first display area 1a and the second display area 1b are each provided with a plurality of sub-pixels 131. The sub-pixels 131 may be OLED pixels, including red sub-pixels R, blue sub-pixels B, and green sub-pixels G. Optionally, the transmittance of the array layer 12 in the first display area 1a is greater than that of the array layer in the second display area 1b. Specifically, the density of metal traces in the first array layer 121 in the first display area 1a can be reduced, or the metal traces can be moved to the second array layer 122 to increase the transmittance of the first array layer 121. The volume of the sub-pixels 131 in the first display area 1a can be smaller than that in the second display area 1b, and the gaps between the sub-pixels 131 in the first display area 1a are larger, thereby improving the transmittance of the first display area 1a. Specifically, the substrate 11 may be made of glass, and the bottom end of the enclosure 2 may be disposed on the array layer 12.

[0020] Optionally, see Figure 2 and Figure 3 , Figure 3 This is a partial structural diagram of an embodiment of a display panel of the present application. In this embodiment, the orthographic projection of the barrier 2 on the light-emitting layer 13 is located outside the sub-pixel 131. While the barrier 2 does not block the light emission of the sub-pixel 131, it also does not easily contact the sub-pixel 131, thereby preventing it from affecting its light-emitting effect.

[0021] Optionally, continue to Figure 2 and Figure 3A gap is provided between the multiple sub-pixels 131 in the first display area 1a and the multiple sub-pixels 131 in the second display area 1b, and the orthographic projection of the barrier 2 on the light-emitting layer 13 is located within the gap. The barrier 2 also separates the sub-pixels 131 in the first display area 1a and the second display area 1b, preventing the optical adhesive 3 from overflowing from the first display area 1a and affecting the normal display of the sub-pixels 131 in the second display area 1b.

[0022] Specifically, the orthographic projection of the enclosure 2 on the light-emitting layer 13 can be in the shape of a circular ring, an elliptical ring, a rectangular frame, etc., and this application does not impose any limitation thereto.

[0023] Optionally, see Figure 4 and Figure 5 , Figure 4 is a partial cross-sectional view of another embodiment of the display panel of the present application, Figure 5 It is a partial structural diagram of another embodiment of the display panel of the present application. In this embodiment, the number of the enclosure 2 is multiple ( Figure 4 There are two in the figure), and this application does not limit the number of enclosures 2, and the orthographic projections of multiple enclosures 2 on the light-emitting layer are located within the interval. Figure 5 As shown, multiple enclosures 2 are arranged inside and outside. Optical glue ( Figure 5 (not shown) can be set in the area surrounded by the innermost enclosure 2. Since this area is small, the amount of optical glue 3 is difficult to accurately control, and the problem of optical glue 3 overflowing may occur. By setting multiple layers of enclosures 2, the overflowed optical glue first flows into the gaps between the enclosures 2, preventing the optical glue from entering the second display area 1b, reducing the impact of the optical glue on the normal display of the second display area 1b; and since multiple enclosures 2 reduce the impact of optical glue overflow, the amount of optical glue filled can be slightly more than the preset value, which can avoid the problem of too little optical glue affecting the transmittance. Optionally, the enclosures 2 can be set concentrically so that the gaps between two adjacent enclosures 2 remain consistent along the circumferential direction, so that the amount of overflow can be evenly distributed along the circumferential direction.

[0024] Alternatively, see Figure 6 , Figure 6 It is a partial cross-sectional view of another embodiment of the display panel of the present application. In this embodiment, a plurality of anti-overflow grooves 23 are provided on the side of the enclosure 2 facing the packaging cover plate 4. The overflowed optical adhesive 3 can first flow into the anti-overflow grooves 23. On the one hand, the anti-overflow grooves 23 can accommodate the overflowed optical adhesive 3. On the other hand, the provision of the anti-overflow grooves 23 increases the resistance of the optical adhesive 3 at the upper end of the enclosure 2, reduces the flow rate of the optical adhesive 3, and further enhances the anti-overflow effect. The anti-overflow grooves 23 can be arranged in a ring shape along the circumference, or can be arranged in a scattered point shape. The anti-overflow grooves 23 can be formed at the upper end of the enclosure 2 by etching or other methods.

[0025] Of course, in other embodiments, anti-overflow grooves 23 may be provided on the side of the plurality of enclosures 2 facing the packaging cover plate 4 to further enhance the anti-overflow effect.

[0026] In the direction of the screen pointing toward the enclosure 2, there is a first difference Δn1 between the refractive index n3 of the optical adhesive 3 and the refractive index n4 of the packaging cover plate 4 in contact therewith, and a second difference Δn2 between the refractive index n3 of the optical adhesive 3 and the refractive index n1 of the screen 1 in contact therewith. The absolute value of the first difference Δn1 and the absolute value of the second difference Δn2 are less than or equal to 0.6, that is, |Δn1|≤0.6, |Δn2|≤0.6. Specifically, the refractive index n4 of the packaging cover plate 4 is 1.5, the refractive index n3 of the optical adhesive 3 is 1.5, and the refractive index n1 of the screen 1 is 2. At this time, |Δn1|=0, |Δn2|=0.5, both less than 0.6. Therefore, the degree of reflection and refraction at the interface between the optical adhesive 3 and the packaging cover plate 4, and the interface between the optical adhesive 3 and the screen 1 is greatly reduced, thereby improving the transmittance of the first display area 1a, reducing the stray light in this area, and improving the shooting effect.

[0027] Optionally, the optical adhesive 3 completely fills the first cavity to avoid generating gaps between the upper and lower surfaces of the optical adhesive 3 and the packaging cover plate 4 or the screen body 1 , thereby preventing an increase in the first difference and the second difference.

[0028] Optionally, the top of the enclosure 2 exceeds the light-emitting layer 13. The enclosure 2 also has the function of supporting the package cover plate 4, preventing the package cover plate 4 from contacting the light-emitting layer 13, and reducing the impact on the light-emitting effect of the light-emitting element.

[0029] Optionally, the material of the enclosure 2 includes a transparent photosensitive material. Specifically, the material of the enclosure 2 includes at least one of polyimide or silicone resin. Since polyimide or silicone resin are both transparent materials, the impact of the enclosure 2 on normal display is reduced. By applying a whole layer of transparent photosensitive material on the array layer 12, and then producing a patterned enclosure 2 through exposure, development and curing processes, the shape and size of the enclosure 2 can be adjusted according to needs, and the preparation is relatively convenient. In addition, the enclosure 2 formed in this way has a certain elasticity, so that the enclosure 2 also has the function of buffering the upper packaging cover plate 4; and when the optical glue 3 filled in is too little and not enough to fill the first cavity 21, the packaging cover plate 4 can be pressed down, and the height of the enclosure 2 is reduced to a certain extent to reduce the volume of the first cavity 21 to ensure that the optical glue 3 fills the first cavity 21.

[0030] Optionally, continue to Figure 2 or Figure 4The display panel also includes a plurality of spacers 5, which are spaced apart and arranged between the light-emitting layer 13 and the encapsulation cover plate 4. The orthographic projections of the plurality of spacers 5 on the light-emitting layer 13 are located outside the sub-pixels 131; wherein, the material of the enclosure 2 is the same as that of the spacers. The plurality of spacers 5 are used to support the encapsulation cover plate 4, to prevent the encapsulation cover plate 4 from contacting the light-emitting layer 13 below, and to reduce the impact on the light-emitting effect of the light-emitting elements in the light-emitting layer 13. Since its material is the same as that of the enclosure 2, on the one hand, it will not block the light emission of the sub-pixels 131 and is not easy to contact the sub-pixels 131, thereby avoiding affecting its light-emitting effect; on the other hand, the spacers 5 can be manufactured simultaneously with the enclosure 2, that is, using a pre-designed mask plate, etc., through coating, exposure, development and curing processes to simultaneously complete the production of the enclosure 2 and the spacers 5, thereby simplifying the process steps and improving production efficiency. Of course, in other embodiments, the spacers 5 and the enclosure 2 can also be manufactured separately.

[0031] Optionally, continue to Figure 2 or Figure 4 The enclosure 2, the screen 1 on either side of the enclosure 2, and the encapsulation cover plate 4 together form a second cavity 22 in the second display area 1b. The display panel also includes a protective gas that fills the second cavity 22. Specifically, the encapsulation cover plate 4 is fixed to the substrate 11 with an encapsulation adhesive 41. The screen 1, the encapsulation adhesive 41, the outermost enclosure 2, and the encapsulation cover plate 4 together form the second cavity 22. Specifically, the protective gas can be high-purity nitrogen, which is used to protect the sub-pixels 131 in the second display area 1b of the screen 1.

[0032] Continue reading Figure 2 , the display panel of the present application can be prepared by the following method:

[0033] A substrate 11, an array layer 12 and a light-emitting layer 13 are sequentially stacked to form the light-emitting layer 13, wherein the light-emitting layer 13 includes a plurality of sub-pixels 131, and the sub-pixels 131 are spaced apart from each other;

[0034] A barrier 2 and a plurality of spacers 5 are formed on the side of the array layer 12 facing the light-emitting layer 13. The barrier 2 and the plurality of spacers 5 are sequentially formed by coating, exposure, development, and curing processes. The barrier 2 is disposed at an edge of the first display area 1a adjacent to the second display area 1b. The barrier 2 may be provided in multiple layers, or an anti-overflow groove 23 may be etched at the top of the barrier 2.

[0035] Fill the innermost enclosure 2 with optical glue 3;

[0036] The display panel is placed in a protective gas atmosphere, such as nitrogen, and the encapsulation cover plate 4 is placed over the enclosure 2 and the spacer 5. The encapsulation cover plate 4 is then fixed to the substrate 11 using an encapsulation adhesive 41. The above method forms the aforementioned display panel with high production efficiency, while also improving the imaging quality of the first display area 1a and the protection of the light-emitting layer 13 of the second display area 1b.

[0037] Continue reading Figure 2 The present application also provides a display device, including the display panel of any of the above embodiments, and also including a front camera 6, the front camera 6 is arranged on the side of the screen body 1 away from the packaging cover plate 4, and the front projection of the front camera 6 on the screen body is located in the first display area 1a.

[0038] The display device of the present application forms a closed first cavity 21 in the first display area 1a for under-screen camera, and the first cavity 21 is filled with optical glue 3. The reflection and refraction between the optical glue 3 and the packaging cover plate 4, and between the optical glue 3 and the screen body 1 are low, so that the transmittance of the first display area 1a filled with the optical glue 3 is enhanced, and the stray light in this area is reduced, thereby improving the shooting effect of the front camera 6 under the first display area 1a; and the setting of the enclosure 2 prevents the optical glue 3 from overflowing the first display area 1a, reduces the use of the optical glue 3, and reduces the probability of its released gas contaminating the light-emitting elements on the screen body 1, thereby affecting the life of the display panel. In addition, the enclosure 2 reduces the fluidity of the optical glue 3, ensuring the transmittance of the first display area 1a and the shooting effect of the front camera 6.

[0039] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, 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: include: A screen body comprising a first display area and a second display area located outside the first display area, wherein the light transmittance of the first display area is greater than the light transmittance of the second display area; wherein a barrier is provided at an edge of the first display area adjacent to the second display area; a packaging cover plate, which is arranged on the side of the screen body provided with the enclosure, and the enclosure, the screen body located on both sides of the enclosure, and the packaging cover plate enclose a first cavity at the position of the first display area, and the enclosure, the screen body located on both sides of the enclosure, and the packaging cover plate enclose a second cavity at the position of the second display area; Optical adhesive, located in the first cavity; The second cavity is filled with a protective gas.

2. The display panel according to claim 1, wherein: The screen body includes a substrate, an array layer and a light-emitting layer which are stacked in sequence; the light-emitting layers located in the first display area and the second display area are respectively provided with a plurality of sub-pixels.

3. The display panel according to claim 2, wherein: The light transmittance of the array layer located in the first display area is greater than the light transmittance of the array layer located in the second display area.

4. The display panel according to claim 2, wherein: The light transmittance of the light emitting layer located in the first display area is greater than the light transmittance of the light emitting layer located in the second display area.

5. The display panel according to claim 2, wherein: The orthographic projection of the enclosure on the light-emitting layer is located outside the sub-pixel.

6. The display panel according to any one of claims 2 to 5, characterized in that: A gap is provided between the plurality of sub-pixels located in the first display area and the plurality of sub-pixels located in the second display area, and the orthographic projection of the enclosure on the light-emitting layer is located within the gap.

7. The display panel according to claim 6, wherein: There are multiple enclosures, and the orthographic projections of the multiple enclosures on the light-emitting layer are located within the interval.

8. The display panel according to claim 1, wherein: A plurality of anti-overflow grooves are provided on a side of the enclosure facing the packaging cover plate.

9. The display panel according to claim 2, wherein: In the direction where the screen body is pointing toward the enclosure, there is a first difference between the refractive index of the optical glue and the refractive index of the packaging cover plate in contact with it, and there is a second difference between the refractive index of the optical glue and the refractive index of the screen body in contact with it, and the absolute value of the first difference and the absolute value of the second difference are both less than or equal to 0.

6.

10. The display panel according to claim 9, wherein: The optical adhesive fully fills the first cavity.

11. The display panel according to claim 9, wherein The material of the enclosure includes transparent photosensitive material.

12. The display panel according to claim 11, wherein: The material of the enclosure includes at least one of polyimide or silicone resin.

13. The display panel according to claim 9, wherein: The display panel further includes: A plurality of spacers are provided between the array layer and the packaging cover plate, and the orthographic projections of the plurality of spacers on the light-emitting layer are located outside the sub-pixels; wherein the material of the enclosure is the same as that of the spacers.

14. A display device, characterized in that: include: The display panel according to any one of claims 1 to 13; A front camera is arranged on a side of the screen body away from the packaging cover plate, and the orthographic projection of the front camera on the screen body is located in the first display area.

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