A display panel, a display device and a manufacturing method of a display panel

Abstract

Embodiments of the present application provide a display panel, a display device and a manufacturing method of the display panel. The display panel comprises a first display area and a second display area, the second display area is multiplexed as a light sensing element reserved area; the display panel further comprises an array substrate, an encapsulation layer and a polarizer which are sequentially stacked; the polarizer comprises a first polarizer part located in the first display area and a second polarizer part located in the second display area; the first polarizer part comprises a polarizing layer and a plurality of first auxiliary film layers, and the second polarizer part comprises at least one second auxiliary film layer. Embodiments of the present application provide a display panel, a display device and a manufacturing method of the display panel to improve the attachment yield of the polarizer.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0002] With the development of display technology, display devices (such as mobile phones) are increasingly moving towards ultra-large screen-to-body ratios (i.e., the proportion of the display area to the entire front of the display device) and even full-screen displays. Therefore, how to improve the screen-to-body ratio of display devices has become a research hotspot for those skilled in the art.

[0003] To achieve full-screen display, some functional devices in the display device (such as the front-facing camera) are often placed below a transparent screen. When the functional device is not working, the transparent screen displays the image; when the functional device is working, the transparent screen is transparent. However, in display devices that include polarizers, poor adhesion of the polarizer is one of the important reasons affecting the operation of the functional devices. Summary of the Invention

[0004] This invention provides a display panel, a display device, and a method for manufacturing the display panel, in order to improve the bonding yield of polarizers.

[0005] In a first aspect, embodiments of the present invention provide a display panel, including a first display area and a second display area, wherein the second display area is reused as a reserved area for a photosensitive element;

[0006] The display panel also includes an array substrate, an encapsulation layer, and a polarizer stacked sequentially.

[0007] The polarizer includes a first polarizer portion located in the first display area and a second polarizer portion located in the second display area; the first polarizer portion includes a polarizing layer and multiple first auxiliary film layers, and the second polarizer portion includes at least one second auxiliary film layer.

[0008] Optionally, along the direction perpendicular to the array substrate, the thickness of the first polarizer portion is greater than the thickness of the second polarizer portion, and a groove is formed in the second polarizer portion;

[0009] The display panel also includes a polarizer adhesive layer located in the first display area and the second display area, the polarizer adhesive layer filling the groove.

[0010] Optionally, along a direction perpendicular to the array substrate, the depth of the groove is H1, and the thickness of the polarizer adhesive layer is H2, wherein H1 and H2 satisfy: H1 / H2≤0.3.

[0011] Optionally, along a direction perpendicular to the array substrate, the multilayer first auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer, a first quarter-wave plate layer, a second pressure-sensitive adhesive layer, a first protective layer, and a second protective layer, with the polarizing layer located between the first protective layer and the second protective layer;

[0012] The at least one second auxiliary film layer sequentially comprises the first pressure-sensitive adhesive layer, the first quarter-wave plate layer, the second pressure-sensitive adhesive layer, and the first protective layer; or,

[0013] The at least one second auxiliary film layer sequentially comprises the first pressure-sensitive adhesive layer, the first quarter-wave plate layer, and the second pressure-sensitive adhesive layer; or...

[0014] The at least one second auxiliary film layer includes the second protective layer.

[0015] Optionally, the thickness of the first polarizer portion and the thickness of the second polarizer portion are equal along the direction perpendicular to the array substrate.

[0016] Optionally, along the direction perpendicular to the array substrate, the multilayer first auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer, a first quarter-wave plate layer, a second pressure-sensitive adhesive layer, a first protective layer, and a second protective layer, with the polarizing layer located between the first protective layer and the second protective layer;

[0017] The at least one second auxiliary film layer sequentially comprises a third pressure-sensitive adhesive layer, a second quarter-wave plate layer, a fourth pressure-sensitive adhesive layer, and a third protective layer; the third pressure-sensitive adhesive layer and the first pressure-sensitive adhesive layer are disposed in the same layer, the second quarter-wave plate layer and the first quarter-wave plate layer are disposed in the same layer, the fourth pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are disposed in the same layer, and the third protective layer and the first protective layer are disposed in the same layer; along the direction perpendicular to the array substrate, the thickness of at least one of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, the fourth pressure-sensitive adhesive layer, and the third protective layer is greater than the thickness of the film layer disposed in the same layer; or,

[0018] The at least one second auxiliary film layer sequentially comprises a third pressure-sensitive adhesive layer, a second quarter-wave plate layer, and a fourth pressure-sensitive adhesive layer. The third pressure-sensitive adhesive layer and the first pressure-sensitive adhesive layer are disposed in the same layer, the second quarter-wave plate layer and the first quarter-wave plate layer are disposed in the same layer, and the fourth pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are disposed in the same layer. Along the direction perpendicular to the array substrate, the thickness of at least one of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, and the fourth pressure-sensitive adhesive layer is greater than the thickness of the film layer disposed in the same layer. Alternatively,

[0019] The at least one second auxiliary film layer includes a fourth protective layer, which is disposed in the same layer as the second protective layer; the thickness of the fourth protective layer is greater than the thickness of the second protective layer in the direction perpendicular to the array substrate.

[0020] In a second aspect, embodiments of the present invention provide a display device, including the display panel described in the first aspect; the display device further includes a photosensitive element located in the second display area, the photosensitive element being located on the side of the array substrate away from the encapsulation layer.

[0021] Optionally, the photosensitive element includes a camera device;

[0022] The diameter of the second display area is D1, and the diameter of the light receiving surface of the camera device is D2, where 1μm < D1 - D2 < 2μm.

[0023] Thirdly, embodiments of the present invention provide a method for manufacturing a display panel, the display panel including a first display area and a second display area, wherein the second display area is reused as a reserved area for a photosensitive element;

[0024] The manufacturing method includes:

[0025] Provide array substrate and encapsulation layer;

[0026] A polarizer is provided, the polarizer comprising a first polarizer portion located in a first display area and a second polarizer portion located in a second display area; the first polarizer portion comprises a polarizing layer and multiple first auxiliary film layers, and the second polarizer portion comprises at least one second auxiliary film layer;

[0027] The polarizer is fixed to the encapsulation layer with the polarizing layer on the side away from the encapsulation layer.

[0028] Optionally, a polarizer is provided, the polarizer comprising a first polarizer portion located in the first display area and a second polarizer portion located in the second display area; the first polarizer portion comprising a polarizing layer and multiple first auxiliary film layers, and the second polarizer portion comprising at least one second auxiliary film layer, including:

[0029] Polarizing film is available;

[0030] Remove the polarizing layer corresponding to the second display area from the polarizer to obtain a first polarizer portion located in the first display area and a second polarizer portion located in the second display area, wherein a groove is formed in the second polarizer portion;

[0031] After fixing the polarizer to the encapsulation layer with the polarizing layer away from the encapsulation layer, the manufacturing method further includes:

[0032] A polarizer adhesive layer is formed on the polarizer, and the polarizer adhesive layer fills the groove.

[0033] In the display panel provided by this embodiment of the invention, the first polarizer portion located in the first display area includes a polarizing layer, which may include, for example, iodine or a dichroic dye. The polarizing layer is used to achieve linear polarization of light. The second polarizer portion located in the second display area does not include a polarizing layer; that is, the second polarizer portion does not include iodine or a dichroic dye, nor does it include a substrate film layer for carrying iodine or a dichroic dye. Since the second polarizer portion does not include a polarizing layer, there is no problem of low light transmittance due to a polarizing layer, thus increasing the transmittance of the display panel in the second display area. If all the film layers of the polarizer in the second display area are removed, the polarizer will produce a large groove in the second display area. When the polarizer is attached to other display panel structures using a polarizer adhesive layer, the polarizer adhesive layer cannot completely fill the groove, resulting in bonding bubbles and poor adhesion. In this embodiment of the invention, by retaining at least one second auxiliary film layer in the second display area, the depth of the groove is reduced or even eliminated, preventing the generation of bonding bubbles, thereby improving the adhesion yield of the polarizer. Attached Figure Description

[0034] Figure 1 This is a top view structural diagram of a display panel provided in an embodiment of the present invention;

[0035] Figure 2 For along Figure 1 A simplified cross-sectional view of AA'.

[0036] Figure 3 for Figure 2 A detailed cross-sectional structural diagram of the display panel shown;

[0037] Figure 4 A cross-sectional structural diagram of another display panel provided in an embodiment of the present invention;

[0038] Figure 5 A cross-sectional structural diagram of another display panel provided in an embodiment of the present invention;

[0039] Figure 6 A cross-sectional structural diagram of another display panel provided in an embodiment of the present invention;

[0040] Figure 7 A cross-sectional structural diagram of another display panel provided in an embodiment of the present invention;

[0041] Figure 8 A cross-sectional structural diagram of another display panel provided in an embodiment of the present invention;

[0042] Figure 9This is a top view of a display device provided in an embodiment of the present invention;

[0043] Figure 10 For along Figure 9 A schematic diagram of the cross-sectional structure of BB';

[0044] Figure 11 A flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present invention;

[0045] Figures 12A-12E A schematic diagram illustrating the fabrication of a display panel according to an embodiment of the present invention;

[0046] Figures 13A-13E This is a schematic diagram illustrating the fabrication of another display panel provided in an embodiment of the present invention. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0048] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of the present invention. Figure 2 For along Figure 1 A simplified cross-sectional diagram of AA'. Figure 3 for Figure 2 The detailed cross-sectional structural diagram of the display panel shown is for reference. Figure 1 , Figure 2 and Figure 3 The display panel includes a first display area 101 and a second display area 102, with the second display area 102 multiplexed as a reserved area for a photosensitive element. A portion of the display panel in the second display area 102 can achieve both a light-emitting display state and a transparent state. The display panel also includes an array substrate 10, an encapsulation layer 20, and a polarizer 30 stacked sequentially. The array substrate 10 may include, for example, a substrate and light-emitting units arranged in an array on one side of the substrate. The encapsulation layer 20 may include, for example, encapsulation glass or a thin-film encapsulation layer. The polarizer 30 includes a first polarizer portion 310 located in the first display area 101 and a second polarizer portion 320 located in the second display area 102. The first polarizer portion 310 includes a polarizing layer 315 and multiple first auxiliary film layers, while the second polarizer portion 320 includes at least one second auxiliary film layer. The first and second auxiliary film layers, which are disposed in the same layer, can be formed from the same material in the same process or formed separately in different processes; this embodiment of the invention does not limit this.

[0049] In the display panel provided by this embodiment of the invention, the first polarizer portion located in the first display area includes a polarizing layer, which may include, for example, iodine or a dichroic dye. The polarizing layer is used to achieve linear polarization of light. The second polarizer portion located in the second display area does not include a polarizing layer; that is, the second polarizer portion does not include iodine or a dichroic dye, nor does it include a substrate film layer for carrying iodine or a dichroic dye. Since the second polarizer portion does not include a polarizing layer, there is no problem of low light transmittance due to a polarizing layer, thus increasing the transmittance of the display panel in the second display area. If all the film layers of the polarizer in the second display area are removed, the polarizer will produce a large groove in the second display area. When the polarizer is attached to other display panel structures using a polarizer adhesive layer, the polarizer adhesive layer cannot completely fill the groove, resulting in bonding bubbles and poor adhesion. In this embodiment of the invention, by retaining at least one second auxiliary film layer in the second display area, the depth of the groove is reduced or even eliminated, preventing the generation of bonding bubbles, thereby improving the adhesion yield of the polarizer.

[0050] Optionally, refer to Figure 2 and Figure 3 Along the direction of the vertical array substrate 10, the thickness of the first polarizer portion 310 is greater than the thickness of the second polarizer portion 320, and a groove 301 is formed in the second polarizer portion 320. The display panel also includes a polarizer adhesive layer 40 located in the first display area 101 and the second display area 102. The polarizer adhesive layer 40 can be made, for example, using optically clear adhesive (OCA). The polarizer adhesive layer 40 fills the groove 301. In this embodiment of the invention, the polarizing layer of the polarizer 30 located in the second display area 102 is removed, and at least one second auxiliary film layer is retained. The resulting groove 301 is relatively shallow, which is beneficial for the polarizer adhesive layer 40 to fill the groove 301, thereby improving the adhesion yield of the polarizer 30.

[0051] Optionally, refer to Figure 2 and Figure 3Along a direction perpendicular to the array substrate 10, the depth of the groove 301 is H1, and the thickness of the polarizer adhesive layer 40 is H2. The thickness of the polarizer adhesive layer 40 refers to the distance between the side of the polarizer adhesive layer 40 away from the first polarizer portion 310 and the side of the polarizer adhesive layer 40 adjacent to the first polarizer portion 310. H1 and H2 satisfy: H1 / H2≤0.3. Due to the adhesiveness of the polarizer adhesive layer 40, its flowability is limited. Studies have found that the depth to which the polarizer adhesive layer 40 can fill the groove 301 is related to its thickness; the greater the thickness of the polarizer adhesive layer 40, the greater the depth to which it can fill the groove 301. In this embodiment of the invention, by setting H1 / H2≤0.3, the polarizer adhesive layer 40 completely fills the groove 301.

[0052] Optionally, refer to Figure 2 and Figure 3 Along a direction perpendicular to the array substrate 10, the multilayer first auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, a second pressure-sensitive adhesive layer 313, a first protective layer 314, and a second protective layer 316, with a polarizing layer 315 located between the first protective layer 314 and the second protective layer 316. At least one second auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, a second pressure-sensitive adhesive layer 313, and a first protective layer 314. The first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, and the first protective layer 314 are all located in the first display area 101 and the second display area 102, while the polarizing layer 315 and the second protective layer 316 are only located in the first display area 101. In this embodiment of the invention, the polarizing layer 315 and the second protective layer 316 in the second display area 102 are removed, resulting in the shallowest depth of the groove 301. This facilitates the filling of the groove 301 by the polarizer adhesive layer 40, thereby improving the adhesion yield of the polarizer 30.

[0053] Optionally, refer to Figure 3 The display panel also includes a cover plate 50, which is located on the side of the polarizer adhesive layer 40 away from the array substrate 10. The polarizer adhesive layer 40 is located between the cover plate 50 and the polarizer 30, and is used to bond and fix the cover plate 50 and the polarizer 30. In other embodiments, the polarizer adhesive layer 40 can also be used to bond and fix the polarizer 30 to other structures in the display panel, which is not limited in this embodiment of the present invention.

[0054] Figure 4 This is a cross-sectional structural diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 4At least one second auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, and a second pressure-sensitive adhesive layer 313. The first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, and the second pressure-sensitive adhesive layer 313 are all located in the first display area 101 and the second display area 102, while the first protective layer 314, the polarizing layer 315, and the second protective layer 316 are only located in the first display area 101. In this embodiment of the invention, the first protective layer 314, the polarizing layer 315, and the second protective layer 316 are removed from the second display area 102, resulting in a shallower groove 301. This facilitates the filling of the groove 301 by the polarizer adhesive layer 40, improving the adhesion yield of the polarizer 30. In addition, since the first protective layer 314 has a certain absorption effect on light, removing the first protective layer 314, the polarizing layer 315 and the second protective layer 316 in the second display area 102 can improve the transmittance of the second part 320 of the polarizer compared to removing the first protective layer 314 and the polarizing layer 315 in the second display area 102.

[0055] Figure 5 This is a cross-sectional structural diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 5 At least one second auxiliary film layer includes a second protective layer 316. The first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, and the polarizing layer 315 are located only in the first display area 101, while the second protective layer 316 is located in both the first display area 101 and the second display area 102. In this embodiment of the invention, the first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, and the polarizing layer 315 are removed from the second display area 102, thereby further improving the transmittance of the second portion 320 of the polarizer.

[0056] Optionally, refer to Figure 5 The display panel also includes a cover plate 50, which is located on the side of the polarizer adhesive layer 40 away from the array substrate 10. The polarizer adhesive layer 40 is located between the encapsulation layer 20 and the polarizer 30, and is used to bond and fix the encapsulation layer 20 and the polarizer 30.

[0057] Figure 6 This is a cross-sectional structural diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 6 Along the direction of the vertical array substrate 10, the thickness of the first polarizer portion 310 and the thickness of the second polarizer portion 320 are equal. In this embodiment of the invention, the polarizing layer 315 is formed only in the first display area 101, and the thickness of the first polarizer portion 310 is equal to the thickness of the second polarizer portion 320, thereby eliminating the groove and avoiding the problem of bonding air bubbles when the polarizer adhesive layer 40 cannot completely fill the groove, thus improving the bonding yield of the polarizer 30.

[0058] Optionally, refer to Figure 6 Along the direction of the vertical array substrate 10, the multilayer first auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, a second pressure-sensitive adhesive layer 313, a first protective layer 314, and a second protective layer 316, with a polarizing layer 315 located between the first protective layer 314 and the second protective layer 316. At least one second auxiliary film layer sequentially includes a third pressure-sensitive adhesive layer 321, a second quarter-wave plate layer 322, a fourth pressure-sensitive adhesive layer 323, and a third protective layer 324. The third pressure-sensitive adhesive layer 321 and the first pressure-sensitive adhesive layer 311 are co-layered, the second quarter-wave plate layer 322 and the first quarter-wave plate layer 312 are co-layered, the fourth pressure-sensitive adhesive layer 323 and the second pressure-sensitive adhesive layer 313 are co-layered, and the third protective layer 324 and the first protective layer 314 are co-layered. Along the direction of the vertical array substrate 10, the thickness of at least one of the third pressure-sensitive adhesive layer 321, the second quarter-wave plate layer 322, the fourth pressure-sensitive adhesive layer 323, and the third protective layer 324 is greater than the thickness of the film layer disposed in the same layer.

[0059] For example, refer to Figure 6 The thickness of the third pressure-sensitive adhesive layer 321 is equal to the thickness of the first pressure-sensitive adhesive layer 311; the thickness of the second quarter-wave plate layer 322 is equal to the thickness of the first quarter-wave plate layer 312; and the thickness of the fourth pressure-sensitive adhesive layer 323 is equal to the thickness of the second pressure-sensitive adhesive layer 313. The thickness of the third protective layer 324 is greater than the thickness of the first protective layer 314, and the thickness of the third protective layer 324 is equal to the sum of the thicknesses of the first protective layer 314, the polarizing layer 315, and the second protective layer 316.

[0060] Figure 7 This is a cross-sectional structural diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 7 At least one second auxiliary film layer sequentially includes a third pressure-sensitive adhesive layer 321, a second quarter-wave plate layer 322, and a fourth pressure-sensitive adhesive layer 323. The third pressure-sensitive adhesive layer 321 and the first pressure-sensitive adhesive layer 311 are disposed in the same layer, the second quarter-wave plate layer 322 and the first quarter-wave plate layer 312 are disposed in the same layer, and the fourth pressure-sensitive adhesive layer 323 and the second pressure-sensitive adhesive layer 313 are disposed in the same layer. Along the direction of the vertical array substrate 10, the thickness of at least one of the third pressure-sensitive adhesive layer 321, the second quarter-wave plate layer 322, and the fourth pressure-sensitive adhesive layer 323 is greater than the thickness of the film layer disposed in the same layer.

[0061] For example, refer to Figure 7The thickness of the third pressure-sensitive adhesive layer 321 is equal to the thickness of the first pressure-sensitive adhesive layer 311, the thickness of the second quarter-wave plate layer 322 is equal to the thickness of the first quarter-wave plate layer 312, the thickness of the fourth pressure-sensitive adhesive layer 323 is greater than the thickness of the second pressure-sensitive adhesive layer 313, and the thickness of the fourth pressure-sensitive adhesive layer 323 is equal to the sum of the thicknesses of the second pressure-sensitive adhesive layer 313, the first protective layer 314, the polarizing layer 315, and the second protective layer 316.

[0062] Figure 8 This is a cross-sectional structural diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 8 At least one second auxiliary film layer includes a fourth protective layer 326, which is disposed in the same layer as the second protective layer 316. Along the direction of the vertical array substrate 10, the thickness of the fourth protective layer 326 is greater than the thickness of the second protective layer 316.

[0063] For example, refer to Figure 8 The thickness of the fourth protective layer 326 is greater than the thickness of the second protective layer 316, and the thickness of the fourth protective layer 326 is equal to the thickness of the first polarizer portion 310. That is, the thickness of the fourth protective layer 326 is equal to the sum of the thicknesses of the first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, the polarizer layer 315, and the second protective layer 316.

[0064] It should be noted that, Figures 3-8 The polarizer 30 shown in the diagram includes both a first quarter-wave plate 312 and a polarizing layer 315 in the first display area 101. The first quarter-wave plate 312 and the polarizing layer 315 constitute a circular polarizer. The circular polarizer can reduce ambient light reflected by the internal metal layer of the display panel, thereby eliminating glare. In other embodiments, the polarizer 30 may also include a half-wave plate, which may be located between the first display area 101 and the second display area 102. The half-wave plate is positioned between the first quarter-wave plate 312 and the polarizing layer 315 to enhance the glare reduction effect at wide viewing angles.

[0065] Figure 9 This is a top view of a display device according to an embodiment of the present invention. Figure 10 For along Figure 9 A schematic diagram of the cross-sectional structure of BB' (see reference). Figure 9 and Figure 10The display device includes the display panel 100 in any of the above embodiments. The display device also includes a photosensitive element 200 located in the second display area 102, with the photosensitive element 200 situated on the side of the array substrate 10 away from the encapsulation layer 20. When the photosensitive element 200 is not in operation, the display panel 100 displays an image; when the photosensitive element 200 is in operation, the portion of the display panel located in the second display area 102 is transparent, allowing external light to pass through the display panel and reach the photosensitive element 200. Because the display panel 100 provided in this embodiment has high transmittance and the polarizer 30 has high bonding yield, in the display device including the display panel 100 in any of the above embodiments, the photosensitive element 200 can receive more light, and the adverse effects of poor bonding of the polarizer 30 (e.g., bonding bubbles) on the operation of the photosensitive element 200 are avoided. The photosensitive element 200 may include, for example, a fingerprint recognition device or a camera device that requires the display panel 100 to collect external light.

[0066] Optionally, refer to Figure 9 and Figure 10 The photosensitive element 200 includes a camera device. The diameter of the second display area 102 is D1, and the diameter of the light-receiving surface of the camera device is D2, where 1μm < D1-D2 < 2μm. Since the camera device is not in direct contact with the polarizer 30, an array substrate 10 and an encapsulation layer 20 are also disposed between the camera device and the polarizer 30. In this embodiment of the invention, the diameter is set to 1μm < D1-D2 < 2μm, and the area of ​​the second display area 102 is larger than the area of ​​the light-receiving surface of the camera device. This expands the angular range that external light can pass through the polarizer 30 and the display panel 10 of the second display area 102 and reach the camera device, thereby improving the imaging quality of the camera device.

[0067] This invention also provides a method for manufacturing the display panel described in the above embodiments. Figure 11 This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present invention. Figures 12A-12E This is a schematic diagram illustrating the fabrication of a display panel according to an embodiment of the present invention. (Refer to...) Figure 11 ,as well as Figures 12A-12E The display panel includes a first display area 101 and a second display area 102, wherein the second display area 102 is reused as a reserved area for a photosensitive element. The manufacturing method of the display panel includes the following steps:

[0068] S110 provides an array substrate 10 and a packaging layer 20.

[0069] S120. A polarizer 30 is provided, which includes a first polarizer portion 310 located in the first display area 101 and a second polarizer portion 320 located in the second display area 102. The first polarizer portion 310 includes a polarizing layer 315 and multiple first auxiliary film layers, and the second polarizer portion 320 includes at least one second auxiliary film layer.

[0070] S130. The polarizer 30 is fixed to the encapsulation layer 20 with the polarizer 315 away from the encapsulation layer 20.

[0071] For example, refer to Figure 12D The polarizer 30 is fixed to the encapsulation layer 20 on the side opposite to the groove 301.

[0072] In the method for manufacturing a display panel provided in this embodiment of the invention, the second polarizer portion located in the second display area does not include a polarizing layer, thus avoiding the problem of low light transmittance caused by the polarizing layer. At least one second auxiliary film layer is retained in the second display area, reducing the depth of the groove or even eliminating the groove, preventing the generation of bonding bubbles, thereby improving the bonding yield of the polarizer.

[0073] Optionally, refer to Figures 12A-12E Step S120 may include the following steps:

[0074] S1211, Provides polarizer 30.

[0075] For example, refer to Figure 12B A polarizer 30 is provided, comprising a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, a second pressure-sensitive adhesive layer 313, a first protective layer 314, a polarizing layer 315, and a second protective layer 316, which are sequentially stacked. The first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, the polarizing layer 315, and the second protective layer 316 are all located in the first display area 101 and the second display area 102.

[0076] S1212, Remove the polarizing layer 315 in the polarizer 30 corresponding to the second display area 102 to obtain the first polarizer portion 310 located in the first display area 101 and the second polarizer portion 320 located in the second display area 102, wherein a groove 301 is formed in the second polarizer portion 320.

[0077] For example, refer to Figure 12CThe polarizing layer 315 and the second protective layer 316 corresponding to the second display area 102 in the polarizer 30 are removed, while the first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, and the first protective layer 314 corresponding to the second display area 102 in the polarizer 30 are retained. Since the removal of the polarizing layer 315 and the second protective layer 316 in the second display area 102 results in the shallowest groove 301, it is beneficial for the polarizer adhesive layer 40 to fill the groove 301, thus improving the adhesion yield of the polarizer 30. The polarizing layer of the polarizer 30 in the second display area 102 can be removed, for example, by mechanical cutting.

[0078] Optionally, refer to Figure 12E After step S130, the method for manufacturing the display panel further includes:

[0079] S141. A polarizer adhesive layer 40 is formed on the side of the polarizer 30 away from the array substrate 10, and the polarizer adhesive layer 40 fills the groove 301.

[0080] Optionally, refer to Figure 12E After step S141, the method for manufacturing the display panel further includes:

[0081] S151. A cover plate 50 is formed on the side of the polarizer adhesive layer 40 away from the array substrate 10.

[0082] In the display panel manufacturing method provided in this embodiment of the invention, by removing the polarizing layer of the polarizer in the second display area and retaining at least one second auxiliary film layer, the problem of low light transmittance caused by the polarizing layer is avoided, and the depth of the groove is reduced to prevent the generation of bonding bubbles, thereby improving the bonding yield of the polarizer.

[0083] Figures 13A-13E This is a schematic diagram illustrating the fabrication of another display panel provided in an embodiment of the present invention, with reference to... Figures 13A-13E Step S120 may include the following steps:

[0084] S1221, at least one first auxiliary film layer is formed in the first display area 101, and at least one second auxiliary film layer is formed in the second display area 102; the sum of the thicknesses of all the first auxiliary film layers in the first display area 101 is less than the sum of the thicknesses of all the second auxiliary film layers in the second display area 102.

[0085] For example, refer to Figure 13BIn the first display area 101, a first pressure-sensitive adhesive layer 311, a first quarter-wave plate layer 312, a second pressure-sensitive adhesive layer 313, and a first protective layer 314 are sequentially formed. In the second display area 102, a third pressure-sensitive adhesive layer 321, a second quarter-wave plate layer 322, a fourth pressure-sensitive adhesive layer 323, and a third protective layer 324 are sequentially formed. The first pressure-sensitive adhesive layer 311 and the third pressure-sensitive adhesive layer 321 can be formed using the same material in the same process, and both have equal thicknesses. The first quarter-wave plate layer 312 and the second quarter-wave plate layer 322 can be formed using the same material in the same process, and both have equal thicknesses. The second pressure-sensitive adhesive layer 313 and the fourth pressure-sensitive adhesive layer 323 can be formed using the same material in the same process, and both have equal thicknesses. The first protective layer 314 and the third protective layer 324 can be formed from the same material. The thickness of the third protective layer 324 is greater than that of the first protective layer 314. For example, a uniform film layer with a large thickness that covers the first display area 101 and the second display area 102 can be formed. Then, the first protective layer 314 and the second protective layer 324 are formed by removing part of the thickness of the film layer in the first display area 101.

[0086] S1222, A polarizing layer 315 and at least one first auxiliary film layer covering the polarizing layer 315 are formed in the first display area 101 to obtain a first polarizer portion 310 located in the first display area 101 and a second polarizer portion 320 located in the second display area 102, wherein the thickness of the first polarizer portion 310 is equal to the thickness of the second polarizer portion 320.

[0087] For example, refer to Figure 13C A polarizing layer 315 is formed on the first protective layer 314 of the first display area 101, and a second protective layer 316 is formed on the polarizing layer 315 of the first display area 101.

[0088] Optionally, refer to Figure 13E After step S130, the method for manufacturing the display panel further includes:

[0089] S142. A polarizer adhesive layer 40 is formed on the polarizer 30.

[0090] Optionally, refer to Figure 13E After step S142, the method for manufacturing the display panel also includes:

[0091] S152, A cover plate 50 is formed on the side of the polarizer adhesive layer 40 away from the array substrate 10.

[0092] Optionally, in forming such Figure 5When manufacturing the display panel as shown, step S120 may include: removing the first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, and the polarizing layer 315 of the second display area 102. Before step S130, the method for manufacturing the display panel further includes: forming a polarizing film adhesive layer 40 on the side of the encapsulation layer 20 away from the array substrate 10. Step S130 may include: fixing the side of the polarizing film 30 with the groove 301 to the encapsulation layer 20, and filling the groove 301 with the polarizing film adhesive layer 40.

[0093] Optionally, in forming such Figure 8 When manufacturing the display panel as shown, step S120 may include: forming a second protective layer 316 in the first display area 101 and a fourth protective layer 326 in the second display area 102, wherein the thickness of the fourth protective layer 326 is greater than the thickness of the second protective layer 316; a polarizing layer 315, a first protective layer 314, a second pressure-sensitive adhesive layer 313, a first quarter-wave plate layer 312, and a first pressure-sensitive adhesive layer 311 are sequentially formed on the second protective layer 316 in the first display area 101, wherein the thicknesses of the first pressure-sensitive adhesive layer 311, the first quarter-wave plate layer 312, the second pressure-sensitive adhesive layer 313, the first protective layer 314, the polarizing layer 315, and the second protective layer 316 are equal to the thickness of the fourth protective layer 326. Before step S130, the method for manufacturing the display panel further includes: forming a polarizing film adhesive layer 40 on the side of the encapsulation layer 20 away from the array substrate 10. Step S130 may include fixing the side of the polarizing layer 315 in the polarizer 30 away from the second protective layer 316 to the encapsulation layer 20.

[0094] In the display panel manufacturing method provided in this embodiment of the invention, a polarizer is formed in the first display area, and at least one second auxiliary film layer is formed in the second display area. The thickness of the first part of the polarizer is equal to the thickness of the second part of the polarizer. This avoids the problem of low light transmittance caused by the polarizer layer, eliminates the groove, and prevents the generation of bonding bubbles, thereby improving the bonding yield of the polarizer.

[0095] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized by, The display panel comprises a first display area and a second display area, and the second display area is multiplexed as a light sensing element reserved area; The display panel further comprises an array substrate, an encapsulation layer and a polarizer which are sequentially stacked; The polarizer comprises a first polarizer part located in the first display area and a second polarizer part located in the second display area; the first polarizer part comprises a polarizing layer and a plurality of first auxiliary film layers; the second polarizer part comprises at least one second auxiliary film layer; the second polarizer part does not comprise a polarizing layer; the second polarizer part does not comprise iodine or dichromatic dye, nor a base material film layer for carrying iodine or dichromatic dye; The first auxiliary film layer and the second auxiliary film layer which are arranged in the same layer are formed by the same material in the same process; In a direction perpendicular to the array substrate, the thickness of the first polarizer part is greater than the thickness of the second polarizer part, and a groove is formed in the second polarizer part; The display panel further comprises a polarizer adhesive layer located in the first display area and the second display area, and the polarizer adhesive layer fills the groove; In a direction perpendicular to the array substrate, the depth of the groove is H1, and the thickness of the polarizer adhesive layer is H2, and H1 / H2≤0.3; The thickness of the polarizer adhesive layer refers to the distance between the side of the polarizer adhesive layer away from the first polarizer part and the side of the polarizer adhesive layer adjacent to the first polarizer part; In a direction perpendicular to the array substrate, the plurality of first auxiliary film layers comprise, in sequence, a first pressure-sensitive adhesive layer, a first quarter-wave plate layer, a second pressure-sensitive adhesive layer, a first protective layer and a second protective layer, and the polarizing layer is located between the first protective layer and the second protective layer; The at least one second auxiliary film layer comprises, in sequence, the first pressure-sensitive adhesive layer, the first quarter-wave plate layer, the second pressure-sensitive adhesive layer and the first protective layer; or The at least one second auxiliary film layer comprises, in sequence, the first pressure-sensitive adhesive layer, the first quarter-wave plate layer and the second pressure-sensitive adhesive layer.

2. A display panel, characterized by, The display panel comprises a first display area and a second display area, and the second display area is multiplexed as a light sensing element reserved area; The display panel further comprises an array substrate, an encapsulation layer and a polarizer which are sequentially stacked; The polarizer comprises a first polarizer part located in the first display area and a second polarizer part located in the second display area; the first polarizer part comprises a polarizing layer and a plurality of first auxiliary film layers; the second polarizer part comprises at least one second auxiliary film layer; the second polarizer part does not comprise a polarizing layer; the second polarizer part does not comprise iodine or dichromatic dye, nor a base material film layer for carrying iodine or dichromatic dye; The first auxiliary film layer and the second auxiliary film layer which are arranged in the same layer are formed by the same material in the same process; In a direction perpendicular to the array substrate, the thickness of the first polarizer part and the thickness of the second polarizer part are equal; Along the direction perpendicular to the array substrate, the multilayer first auxiliary film layer sequentially includes a first pressure-sensitive adhesive layer, a first quarter-wave plate layer, a second pressure-sensitive adhesive layer, a first protective layer, and a second protective layer, with the polarizing layer located between the first protective layer and the second protective layer; The at least one second auxiliary film layer sequentially comprises a third pressure-sensitive adhesive layer, a second quarter-wave plate layer, a fourth pressure-sensitive adhesive layer, and a third protective layer; the third pressure-sensitive adhesive layer and the first pressure-sensitive adhesive layer are disposed in the same layer, the second quarter-wave plate layer and the first quarter-wave plate layer are disposed in the same layer, the fourth pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are disposed in the same layer, and the third protective layer and the first protective layer are disposed in the same layer; along the direction perpendicular to the array substrate, the thickness of at least one of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, the fourth pressure-sensitive adhesive layer, and the third protective layer is greater than the thickness of the film layer disposed in the same layer; the sum of the thicknesses of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, the fourth pressure-sensitive adhesive layer, and the third protective layer is equal to the thickness of the first polarizer portion, or, The at least one second auxiliary film layer sequentially comprises a third pressure-sensitive adhesive layer, a second quarter-wave plate layer, and a fourth pressure-sensitive adhesive layer. The third pressure-sensitive adhesive layer and the first pressure-sensitive adhesive layer are disposed in the same layer, the second quarter-wave plate layer and the first quarter-wave plate layer are disposed in the same layer, and the fourth pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are disposed in the same layer. Along the direction perpendicular to the array substrate, the thickness of at least one of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, and the fourth pressure-sensitive adhesive layer is greater than the thickness of the film layer disposed in the same layer. The sum of the thicknesses of the third pressure-sensitive adhesive layer, the second quarter-wave plate layer, and the fourth pressure-sensitive adhesive layer is equal to the thickness of the first polarizer portion, or... The at least one second auxiliary film layer includes a fourth protective layer, which is disposed in the same layer as the second protective layer; the thickness of the fourth protective layer is greater than the thickness of the second protective layer in the direction perpendicular to the array substrate; the thickness of the fourth protective layer is equal to the thickness of the first polarizer portion.

3. A display device, characterized by comprising: The display device includes the display panel according to any one of claims 1-2; the display device further includes a photosensitive element located in the second display area, the photosensitive element being located on the side of the array substrate away from the encapsulation layer.

4. The display device according to claim 3, wherein The photosensitive element includes a camera device; The diameter of the second display area is D1, and the diameter of the light receiving surface of the camera device is D2, where 1μm < D1 - D2 < 2μm.

5. A method of manufacturing a display panel according to claim 1, wherein The display panel includes a first display area and a second display area, wherein the second display area is reused as a reserved area for a photosensitive element. The manufacturing method includes: Provide array substrate and encapsulation layer; Polarizing film is available; Remove the polarizing layer corresponding to the second display area from the polarizer to obtain a first polarizer portion located in the first display area and a second polarizer portion located in the second display area, wherein a groove is formed in the second polarizer portion; The side of the polarizer facing away from the groove is fixed to the encapsulation layer; A polarizer adhesive layer is formed on the polarizer, and the polarizer adhesive layer fills the groove; The first auxiliary film layer and the second auxiliary film layer, which are disposed in the same layer, are formed from the same material in the same process.

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