WO2026007181A1 - 显示模组和显示装置 - Google Patents

显示模组和显示装置

Info

Publication number
WO2026007181A1
WO2026007181A1 PCT/CN2024/108127 CN2024108127W WO2026007181A1 WO 2026007181 A1 WO2026007181 A1 WO 2026007181A1 CN 2024108127 W CN2024108127 W CN 2024108127W WO 2026007181 A1 WO2026007181 A1 WO 2026007181A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
adhesive layer
light
display
display module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/108127
Other languages
English (en)
French (fr)
Inventor
黄海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to KR1020257016432A priority Critical patent/KR20260005866A/ko
Publication of WO2026007181A1 publication Critical patent/WO2026007181A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/126—Shielding, e.g. light-blocking means over the TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates

Definitions

  • This application relates to the field of display technology, and more particularly to a display module and a display device.
  • OLED display panels possess characteristics such as self-illumination, wide viewing angle, short response time, high luminous efficiency, wide color gamut, low operating voltage, and flexibility, making them considered the most promising new type of display panel.
  • the flexibility of OLED display panels allows for the creation of display devices with fixed curved surfaces as well as foldable displays.
  • flexible OLED display panels can utilize a pad bending process to fold and fix structures such as fan-out traces, bonding areas, and flexible printed circuit boards (FPCs) to the back of the display body, thereby reducing the bezel size of flexible OLED display devices and achieving a high screen-to-body ratio.
  • FPCs flexible printed circuit boards
  • This application provides a display module and a display device to alleviate the technical problem of air bubbles at the edge of the display area of a flexible OLED display device.
  • embodiments of this application provide a display module, which includes a display area and a border area located outside the display area; the display module further includes:
  • the display panel has opposing light-emitting and non-light-emitting sides.
  • the display panel includes a first planar portion, a second planar portion, and a bent portion connecting the first planar portion and the second planar portion.
  • the second planar portion is bent to the non-light-emitting side of the first planar portion through the bent portion, and the bent portion is located within the frame area.
  • a first protective layer is disposed on the light-emitting side of the display panel
  • a light-shielding layer is disposed on the side of the first protective layer near the display panel, and the light-shielding layer is located within the frame area;
  • a first adhesive layer is disposed between the first protective layer and the display panel.
  • the first adhesive layer is located in the display area and extends from the display area into the border area.
  • the first adhesive layer overlaps with and contacts at least a portion of the light-shielding layer.
  • the first adhesive layer which overlaps with the light-shielding layer, also overlaps with at least a portion of the bent portion.
  • embodiments of this application also provide a display device, which includes the display module of the foregoing embodiments.
  • Figure 1 is a partial cross-sectional structural diagram of the display module provided in the preamble of the embodiments of this application.
  • Figure 2 is a schematic diagram of the first cross-sectional structure of the display module provided in the embodiment of this application.
  • Figure 3 is a schematic diagram of a second cross-sectional structure of the display module provided in an embodiment of this application.
  • Figure 4 is a schematic diagram of a third cross-sectional structure of the display module provided in the embodiment of this application.
  • Figure 5 is a schematic diagram of the fourth cross-sectional structure of the display module provided in the embodiment of this application.
  • Figure 6 shows the local stress simulation data of the module shown in Figure 5.
  • Figure 7 is a schematic diagram of the fifth cross-sectional structure of the display module provided in the embodiment of this application.
  • Figure 8 is a schematic diagram of the sixth cross-sectional structure of the display module provided in the embodiment of this application.
  • Figure 9 is a partial top view of the second adhesive layer in Figure 8.
  • the display module includes a display panel 10', a first protective layer 21', a light-shielding layer 22', a first adhesive layer 23', a polarizer 30', and a first adhesive layer 40'.
  • the air bubbles 500' at the edge of the display area are mainly concentrated at the discontinuity formed between the light-shielding layer 22' and the first protective layer 21'.
  • the inventors further analyzed the cause of the air bubbles at this location.
  • a reserved gap needs to be provided between the film layer above the display panel 10' and the first adhesive layer 40'.
  • the polarizer 30' and the first adhesive layer 23' both have reserved gaps with the first adhesive layer 40' in the horizontal direction.
  • the existence of this reserved gap is not conducive to reducing the bezel size.
  • the size of this reserved gap needs to be reduced.
  • the coverage length of the first adhesive layer 23' can be reduced, so that the first adhesive layer 23' is recessed within the polarizer 30'.
  • this application provides a display module and a display device.
  • this application provides a display module, which includes a display area and a border area located outside the display area; the display module further includes:
  • a first protective layer is disposed on the light-emitting side of the display panel
  • the second protective layer is disposed on the side of the first protective layer near the display panel, and the first adhesive layer is located between the second protective layer and the first protective layer;
  • a second adhesive layer is disposed on the side of the second protective layer near the display panel, the second adhesive layer is located in the display area and extends from the display area into the border area;
  • the width of the first adhesive layer overlapping the light-shielding layer is greater than the width of the second adhesive layer overlapping the light-shielding layer.
  • a first adhesive layer the first adhesive layer at least covering the bent portion
  • the elastic modulus of the second insulating layer is less than that of the elastic modulus of the first adhesive layer.
  • the display module further includes a third isolation layer disposed on the side of the second adhesive layer away from the bend; wherein the surface adhesion of the third isolation layer on the side away from the second adhesive layer is less than the surface adhesion of the second adhesive layer.
  • the elastic modulus of the third insulating layer is less than that of the second adhesive layer.
  • the first planar portion includes a first sub-portion near the bent portion, the first sub-portion being located within the frame area, the second adhesive layer further covering the first sub-portion, and the third isolation layer being disposed on the side of the second adhesive layer away from the first sub-portion; wherein the third isolation layer overlapping the first sub-portion is provided with a first perforated structure.
  • the surface tack of the second adhesive layer covering the bend is less than the surface tack of the second adhesive layer located between the second protective layer and the display panel.
  • the first planar portion includes a first sub-portion near the bent portion, the first sub-portion being located within the frame area, and the second adhesive layer also covering the first sub-portion; wherein the second adhesive layer covering the first sub-portion is provided with a second perforated structure.
  • the orthographic projection of the display panel on the first plane is located within the range of the orthographic projection of the first protective layer on the first plane, and the orthographic projection area of the first protective layer is larger than the orthographic projection area of the display panel; wherein, the first plane is parallel to the light-emitting side surface of the display panel.
  • the outer boundary of the first adhesive layer is flush with the outer boundary of the first protective layer.
  • this application also provides a display device that includes a display module of one of the foregoing embodiments.
  • the display module and display device provided in this application include a display area and a frame area located outside the display area; the display module also includes a display panel, a first protective layer, a light-shielding layer, and a first adhesive layer.
  • the first protective layer is disposed on the light-emitting side of the display panel; the light-shielding layer is disposed on the side of the first protective layer close to the display panel and is located within the frame area; the first adhesive layer is disposed between the first protective layer and the display panel, is located in the display area, and extends from the display area into the frame area; the first adhesive layer overlaps with and contacts at least a portion of the light-shielding layer, and the first adhesive layer overlapping with the light-shielding layer also overlaps with at least a portion of the bent portion of the display panel, thereby increasing the overlap area between the first adhesive layer and the light-shielding layer, enabling the first adhesive layer to fill the gap between the light-shielding layer and the first protective layer,
  • FIG. 2 is a schematic cross-sectional view of the first type of display module provided in this application embodiment.
  • the display module 100 includes a display area AA and a border area BA located outside the display area AA.
  • the display area AA is used to display images
  • the border area BA is used to set up bonding structures, peripheral circuits, etc.
  • the display panel 10 includes a flexible organic light-emitting diode (OLED) display panel 10, etc.
  • the display panel 10 may include a substrate and a driving circuit layer, a light-emitting functional layer, and an encapsulation layer sequentially stacked on the substrate.
  • OLED organic light-emitting diode
  • the driving circuit layer is provided with a driving circuit, and the light-emitting functional layer is provided with a light-emitting device.
  • the driving circuit is used to drive the light-emitting device to emit light
  • the encapsulation layer is used to protect the light-emitting device and prevent water and oxygen intrusion that could cause the light-emitting device to fail.
  • the flexible organic light-emitting diode display panel 10 has flexible characteristics, which allows the display panel 10 to be bent or folded.
  • the display panel 10 includes a first planar portion 11, a second planar portion 12, and a bent portion 13 connecting the first planar portion 11 and the second planar portion 12.
  • the second planar portion 12 is bent to the side of the first planar portion 11 away from the first protective layer 21 via the bent portion 13. At least a portion of the bent portion 13 is located within the bezel area BA, and the first planar portion 11 is located at least within the display area AA. Bonding lines are provided on the second planar portion 12 and the bent portion 13.
  • the display module 100 further includes a display panel 10, a first protective layer 21, a light-shielding layer 22, and a first adhesive layer 23.
  • the display panel 10 has opposing light-emitting and non-light-emitting sides.
  • the light-emitting side is the side of the display panel 10 where the image is displayed
  • the non-light-emitting side is the side of the display panel 10 facing away from the light-emitting side.
  • the first protective layer 21 is disposed on the light-emitting side of the display panel 10, located within the display area AA, and extending from the display area AA to the border area BA.
  • the light-shielding layer 22 is disposed on the side of the first protective layer 21 closest to the display panel 10, and is located in the border area BA.
  • the first adhesive layer 23 is disposed between the first protective layer 21 and the display panel 10, located within the display area AA, and extending from the display area AA to the border area BA.
  • the first adhesive layer 23 overlaps with and contacts at least a portion of the light-shielding layer 22. Furthermore, the first adhesive layer 23, which overlaps with the light-shielding layer 22, also overlaps with at least a portion of the bent portion 13.
  • "overlapping two structures” means that the orthographic projections of the two structures on a specific plane have overlapping portions.
  • the first adhesive layer 23, which overlaps with the light-shielding layer 22, also overlaps with at least a portion of the bent portion 13 means that the orthographic projections of the first adhesive layer 23 and at least a portion of the bent portion 13 on a specific plane have overlapping portions, and the specific plane is parallel to the light-emitting side surface of the display panel 10.
  • the overlap area between the first adhesive layer 23 and the light-shielding layer 22 is increased.
  • This allows the first adhesive layer 23 to fill the gap between the light-shielding layer 22 and the first protective layer 21, reducing the risk of bubbles forming at the gap location and thus improving the problem of bubbles at the edge of the display area AA of the flexible OLED display device.
  • the edge leakage problem caused by the first adhesive layer 23 being recessed within the inner circle of the light-shielding layer 22 can also be avoided.
  • the display module 100 further includes a first adhesive layer 40, which at least covers the bent portion 13.
  • the first adhesive layer 40 may also extend from the bent portion 13 to a portion of the first planar portion 11 and a portion of the second planar portion 12.
  • the first planar portion 11 includes a first sub-portion 111 near the bent portion 13, the first sub-portion 111 being located within the border area BA, and the first adhesive layer 40 also covering a portion of the first sub-portion 111.
  • the material of the third protective portion includes UV adhesive, etc.
  • the display module 100 further includes a first isolation layer 60, which is disposed on the side of the first adhesive layer 40 away from the bending portion 13.
  • the surface adhesion of the first isolation layer 60 on the side away from the first adhesive layer 40 is less than that of the first adhesive layer 40.
  • the elastic modulus of the first isolation layer 60 is less than that of the first adhesive layer 40, to avoid affecting the bending performance of the bending portion 13 when the first isolation layer 60 is disposed on the first adhesive layer 40.
  • the first isolation layer 60 covers the surface of the first adhesive layer 40 on the side away from the bending portion 13.
  • the first isolation layer 60 covers at least the area where the first adhesive layer 40 overlaps with the first protective layer 21 to isolate the first adhesive layer 40 from the first protective layer 21 and prevent the first adhesive layer 40 from adhering to the first protective layer 21.
  • the thickness of the first isolation layer 60 is less than the spacing between the first adhesive layer 40 and the first protective layer 21.
  • the first isolation layer 60 can be a single-sided tape, a weakly tacky film, or a non-adhesive coating, etc.
  • the display module 100 further includes a back plate 51, a buffer layer 52, an auxiliary support layer 53, and a third adhesive layer 54.
  • the back plate 51 is disposed on the non-light-emitting side of the display panel 10 and is attached to the display panel 10.
  • the back plate 51 is broken at the position corresponding to the bent portion 13, so that the back plate 51 is arranged in two sections.
  • the back plate 51 includes a first sub-back plate 511 and a second sub-back plate 512, the first sub-back plate 511 is disposed corresponding to the first planar portion 11, and the second sub-back plate 512 is disposed corresponding to the second planar portion 12.
  • the material of the back plate 51 includes polyethylene terephthalate (PET) and the like.
  • the buffer layer 52 is disposed on the side of the first sub-backplate 511 away from the first flat portion 11.
  • the material of the buffer layer 52 includes polyimide (PI) and the like.
  • the auxiliary support layer 53 is disposed on the side of the buffer layer 52 away from the first sub-backplate 511.
  • the material of the auxiliary support layer 53 includes stainless steel (such as SUS) and the like.
  • the stainless steel auxiliary support layer 53 enables the display panel 10 to meet the requirements of dynamic bending, and the stainless steel can ensure the bending shape of the display panel 10 during dynamic bending.
  • the third adhesive layer 54 is disposed between the auxiliary support layer 53 and the second sub-backplate 512, and the second sub-backplate 512 is fixed to the auxiliary support layer 53 by the third adhesive layer 54.
  • the third adhesive layer 54 can be double-sided tape and the like.
  • the auxiliary support layer 53 is provided with a stress relief area 530 at the position corresponding to the folding area.
  • the auxiliary support layer 53 has a hollow structure in the stress relief area 530 to release the stress generated during the folding process.
  • the display module 100 also includes a fourth protective layer 55.
  • the fourth protective layer 55 is disposed on the side of the auxiliary support layer 53 away from the buffer layer 52 and is disposed corresponding to the stress relief area 530.
  • the fourth protective layer 55 can also structurally reinforce the auxiliary support layer 53 in the stress relief area 530.
  • the fourth protective layer 55 can be a single-sided adhesive tape, etc.
  • the display module 100 further includes a polarizer 30 disposed on the light-emitting side of the display panel 10, the polarizer 30 being used to reduce the reflectivity of the display module 100.
  • the polarizer 30 is disposed corresponding to the first planar portion 11.
  • the polarizer 30 is located within the display area AA and extends from the display area AA into the frame area BA. A reserved gap is provided between the polarizer 30 and the first adhesive layer 40, so that the display module 100 of this application can be applied in a foldable display device.
  • the first protective layer 21 is disposed on the side of the polarizer 30 away from the display panel 10, and the first adhesive layer 23 is disposed on the side of the first protective layer 21 close to the polarizer 30.
  • the first protective layer 21 protects the display panel 10 and the polarizer 30.
  • the first protective layer 21 may be a layer formed of polyimide, polyethylene terephthalate, ultra-thin glass (UTG), etc.
  • the material of the first adhesive layer 23 includes transparent optical adhesives, such as OCA.
  • Both the first protective layer 21 and the first adhesive layer 23 are located within the display area AA and extend from the display area AA into the border area BA.
  • the light-shielding layer 22 is disposed on the side of the first protective layer 21 near the polarizer 30 and is located within the border area BA.
  • the outer boundary 220 of the light-shielding layer 22 is flush with the outer boundary 210 of the first protective layer 21.
  • the material of the light-shielding layer 22 includes light-shielding ink, etc.
  • the light-shielding layer 22 is used to shield the border area BA from light, preventing the structure within the border area BA from being exposed.
  • the first adhesive layer 23 extending into the frame area BA overlaps with and contacts the light-shielding layer 22, and the first adhesive layer 23 overlapping with the light-shielding layer 22 also overlaps with at least a portion of the bent portion 13 to increase the overlap area between the first adhesive layer 23 and the light-shielding layer 22.
  • the width of the first adhesive layer 23 overlapping with the light-shielding layer 22 is greater than or equal to 0.2 mm, such as 0.21 mm, 0.22 mm, 0.23 mm, 0.25 mm, 0.28 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.
  • the first adhesive layer 23 has sufficient coverage area on the light-shielding layer 22, thereby enabling the first adhesive layer 23 to fill the gap between the light-shielding layer 22 and the first protective layer 21, reducing the risk of bubbles forming at the gap location, and thus improving the problem of bubbles at the edge of the display area AA of the flexible OLED display device.
  • the orthographic projection of the display panel 10 onto the first plane is within the range of the orthographic projection of the first protective layer 21 onto the first plane, and the orthographic projection area of the first protective layer 21 is larger than the orthographic projection area of the display panel 10; wherein, the first plane is parallel to the light-emitting side surface of the display panel 10, that is, the first plane is the specific plane described above.
  • the first protective layer 21 overlaps with the display panel 10, and the outer boundary 210 of the first protective layer 21 extends beyond the outer boundary 120 of the display panel 10, that is, the first protective layer 21 extends a considerable length toward the frame area BA, so that the first protective layer 21 can directly contact and fix with the middle frame of the display module 100, thereby enabling the first protective layer 21 to replace the front frame of the display module 100 and improve the flatness of the surface of the display module 100.
  • the outer boundary 230 of the first adhesive layer 23 is flush with the outer boundary 210 of the first protective layer 21, so as to further increase the overlap area between the first adhesive layer 23 and the light-shielding layer 22, thereby further reducing the risk of bubbles forming in the first adhesive layer 23 at the discontinuity position, thereby further improving the problem of bubbles at the edge of the display area AA of the flexible OLED display device.
  • Figure 3 is a schematic cross-sectional view of a second display module provided in this application embodiment.
  • the display module 100 further includes a second protective layer 24 and a second adhesive layer 25.
  • the second protective layer 24 is disposed on the side of the first protective layer 21 near the display panel 10.
  • the first adhesive layer 23 is located between the second protective layer 24 and the first protective layer 21, and the first protective layer 21 is bonded to the second protective layer 24 through the first adhesive layer 23.
  • the second adhesive layer 25 is disposed on the side of the second protective layer 24 near the display panel 10.
  • the second adhesive layer 25 is located in the display area AA and extends from the display area AA to the border area BA.
  • the second protective layer 24 is bonded to the polarizer 30 through the second adhesive layer 25.
  • a reserved gap is provided between the second protective layer 24, the second adhesive layer 25, and the first adhesive layer 40.
  • the second adhesive layer 25 overlaps with at least a portion of the light-shielding layer 22 to prevent the second adhesive layer 25 from having exposed edges.
  • the second adhesive layer 25 overlapping with the light-shielding layer 22 also overlaps with at least a portion of the bent portion 13, and the width of the first adhesive layer 23 overlapping with the light-shielding layer 22 is greater than the width of the second adhesive layer 25 overlapping with the light-shielding layer 22.
  • the second protective layer 24 may be a layer formed of polyimide, polyethylene terephthalate, ultra-thin glass (UTG), etc.
  • the second protective layer 24 differs from the first protective layer 21; for example, the first protective layer 21 may be a layer formed of polyimide, while the second protective layer 24 may be a layer formed of polyethylene terephthalate or ultra-thin glass.
  • the material of the second adhesive layer 25 may be the same as that of the first adhesive layer 23, such as transparent optical adhesives like OCA. Other details are provided in the above embodiments and will not be repeated here.
  • Figure 4 is a schematic diagram of a third cross-sectional structure of the display module 100 provided in this application embodiment.
  • the outer boundary of the second protective layer 24 is flush with the outer boundary 210 of the first protective layer 21. That is, the second protective layer 24 also extends a considerable length towards the frame area BA, combining with the first protective layer 21 to jointly replace the front frame.
  • the second protective layer 24 can structurally reinforce the first protective layer 21, improving the structural stability of the first protective layer 21 replacing the front frame.
  • Other descriptions are as described in the above embodiments and will not be repeated here.
  • Figure 5 is a fourth cross-sectional structural diagram of the display module 100 provided in this application embodiment
  • Figure 6 is a local stress simulation data diagram of the display module 100 in Figure 5.
  • the display module 100 further includes a second isolation layer 61.
  • the second isolation layer 61 is disposed on the side of the first adhesive layer 40 away from the bending portion 13, and the surface adhesion of the side of the second isolation layer 61 away from the first adhesive layer 40 is less than the surface adhesion of the first adhesive layer 40.
  • the second release layer 61 covers the surface of the first adhesive layer 40 away from the bend 13.
  • the second release layer 61 covers at least the area where the first adhesive layer 40 and the second protective layer 24 overlap, to isolate the first adhesive layer 40 and the second protective layer 24 and prevent them from sticking together.
  • the thickness of the second release layer 61 is less than the spacing between the first adhesive layer 40 and the second protective layer 24.
  • the second release layer 61 can be a single-sided adhesive tape, a weakly tacky film, or a non-adhesive coating, etc.
  • the solution of setting the second isolation layer 61 on the surface of the first adhesive layer 40 was derived by the inventors of this application through in-depth research. Because the first adhesive layer 40 covering the bent portion 13 plays a crucial role in controlling the bending stress on the bent portion 13, modifying the structure of the first adhesive layer 40 could potentially affect the bending stress on the bent portion 13. To avoid affecting the bending stress on the bent portion 13, the second isolation layer 61 is usually placed on a film layer close to the first adhesive layer 40, such as on the surface of the second protective layer 24 facing the first adhesive layer 40.
  • the leftmost bar in Figure 6 represents the local stress data on the bent portion 13 of the display panel 10 when the second isolation layer 61 is not provided on the first adhesive layer 40;
  • the three bars in the middle area of Figure 6 represent the local stress data on the bent portion 13 of the display panel 10 when a 10-micrometer-thick second isolation layer 61 is provided on the first adhesive layer 40, where 500, 1000, and 1500 in the figure refer to the elastic modulus of the second isolation layer 61, in MPa;
  • the three bars in the rightmost area of Figure 6 represent the local stress data on the bent portion 13 of the display panel 10 when a 30-micrometer-thick second isolation layer 61 is provided on the first adhesive layer 40, where 500, 1000, and 1500 in the figure refer to the elastic modulus of the second isolation layer 61, in MPa.
  • the local stress of the bent portion 13 on the display panel 10 can be reduced, resulting in a reduction of approximately 0.8% in the local stress of the bent portion 13 on the display panel 10. Furthermore, the stress reduction effect is better as the thickness and elastic modulus of the second isolation layer 61 increase.
  • the thickness of the second isolation layer 61 should be less than the gap between the first adhesive layer 40 and the film layer above it to avoid interference between the second isolation layer 61 and the film layer above the first adhesive layer 40.
  • the thickness of the second isolation layer 61 is controlled to be less than 0.1 mm, which not only prevents the first adhesive layer 40 from adhering to the second protective layer 24 but also prevents interference between the second isolation layer 61 and the second protective layer 24.
  • Other explanations are provided in the above embodiments and will not be repeated here.
  • Figure 7 is a fifth cross-sectional structural schematic diagram of the display module 100 provided in this application embodiment.
  • the second adhesive layer 25 extends from the display area AA into the frame area BA and at least covers the bent portion 13, replacing the first adhesive layer 40.
  • the display module 100 further includes a color filter layer 31, which is disposed on the light-emitting side of the display panel 10.
  • the second adhesive layer 25 covers the color filter layer 31 and extends to the bending portion 13.
  • the color filter layer 31 is located at least within the display area AA.
  • the color filter layer 31 also extends from the display area AA to the border area BA.
  • the color filter layer 31 may include a patterned black matrix (BM) and red, blue, and green color resists disposed within the openings of the patterned black matrix.
  • the second adhesive layer 25 covers the color filter layer 31 and extends to the bent portion 13, replacing the first adhesive layer 40. This eliminates the gap between the first adhesive layer 40, the polarizer 30, and the second protective layer 24, reducing the width of the bezel area BA of the display module 100. For example, the width of the bezel area BA of the display module 100 can be reduced by at least 0.3 mm to achieve a narrower bezel.
  • the second adhesive layer 25 also covers a portion of the first planar portion 11 and a portion of the second planar portion 12. When the display module 100 is applied to a foldable display device, the second adhesive layer 25 can be made of foldable OCA adhesive. Other details are described in the above embodiments and will not be repeated here.
  • Figure 8 is a sixth cross-sectional structural schematic diagram of the display module 100 provided in this application embodiment
  • Figure 9 is a partial top view schematic diagram of the second adhesive layer 25 in Figure 8.
  • the display module 100 further includes a third isolation layer 62, which is disposed on the side of the second adhesive layer 25 away from the bent portion 13; wherein, the surface adhesion of the third isolation layer 62 on the side away from the second adhesive layer 25 is less than the surface adhesion of the second adhesive layer 25.
  • the third isolation layer 62 covers the surface of the second adhesive layer 25 on the side away from the bending portion 13.
  • the third isolation layer 62 covers at least the area within the frame region BA where the second adhesive layer 25 and the first adhesive layer 23 overlap, to isolate the second adhesive layer 25 from the first adhesive layer 23 and prevent them from adhering to each other.
  • the thickness of the third isolation layer 62 is less than the spacing between the second adhesive layer 25 and the first adhesive layer 23.
  • the elastic modulus of the third isolation layer 62 is less than the elastic modulus of the second adhesive layer 25, to avoid affecting the bending performance of the bending portion 13 when the third isolation layer 62 is placed on the second adhesive layer 25.
  • the third isolation layer 62 can be insulating tape, single-sided tape, weakly adhesive film, or non-adhesive coating, etc.
  • the second adhesive layer 25 located within the frame area BA and covering the bend 13 can be photocured or semi-cured to reduce the stickiness of the second adhesive layer 25 covering the bend 13, so that the surface stickiness of the second adhesive layer 25 covering the bend 13 is less than the surface stickiness of the second adhesive layer 25 located between the second protective layer 24 and the display panel 10, thereby eliminating the need to additionally provide the third isolation layer 62.
  • the first planar portion 11 includes a first sub-portion 111 near the bent portion 13.
  • the first sub-portion 111 is located within the border area BA, and the second adhesive layer 25 also covers the first sub-portion 111.
  • the second adhesive layer 25 covering the first sub-portion 111 is provided with a second hollow structure 250 to release the stress on the first sub-portion 111 when the bent portion 13 is bent.
  • the shape of the hollow structure 250 can be a regular or irregular shape such as an ellipse, circle, square, rhombus, or rectangle.
  • the arrangement of the hollow structures can be opposite or staggered in the column direction or row direction. In the direction from the display area AA to the border area BA, the arrangement density of the second hollow structure 250 gradually increases.
  • the second hollow structure 250 may also be provided on the second adhesive layer 25 corresponding to the bent portion 13.
  • the first planar portion 11 includes a first sub-portion 111 near the bent portion 13.
  • the first sub-portion 111 is located within the border area BA, and the second adhesive layer 25 also covers the first sub-portion 111.
  • the third isolation layer 62 is also disposed on the side of the second adhesive layer 25 away from the first sub-portion 111.
  • the third isolation layer 62 which overlaps with the first sub-portion 111, is provided with a first perforated structure, which can also release the stress on the first sub-portion 111 when the bent portion 13 is bent. Other descriptions are given in the above embodiments and will not be repeated here.
  • this application also provides a display device, which includes the display module 100 described in one of the foregoing embodiments.
  • the display module includes a display area and a frame area located outside the display area.
  • the display module also includes a display panel, a first protective layer, a light-shielding layer, and a first adhesive layer.
  • the first protective layer is disposed on the light-emitting side of the display panel.
  • the light-shielding layer is disposed on the side of the first protective layer close to the display panel and is located within the frame area.
  • the first adhesive layer is disposed between the first protective layer and the display panel.
  • the first adhesive layer is located in the display area and extends from the display area into the frame area. The first adhesive layer overlaps with at least a portion of the light-shielding layer and is in contact with it.
  • the first adhesive layer overlapping with the light-shielding layer also overlaps with at least a portion of the bent portion of the display panel to increase the overlap area between the first adhesive layer and the light-shielding layer. This allows the first adhesive layer to fill the gap between the light-shielding layer and the first protective layer, reducing the risk of bubbles forming at the gap location and thus improving the problem of bubbles at the edge of the display area of the flexible OLED display device.

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Abstract

本申请提供一种显示模组和显示装置中，该显示模组包括显示面板、第一保护层、遮光层以及第一粘结层，第一粘结层设置于第一保护层与显示面板之间，并从显示模组的显示区延伸至边框区内，第一粘结层与至少部分遮光层重叠且接触，而且与遮光层重叠的第一粘结层还与显示面板的至少部分弯折部重叠。

Description

显示模组和显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示模组和显示装置。
 背景技术
有机发光二极管（Organic Light Emitting Diode，OLED）显示面板具有自发光、广视角、响应时间短、高发光率、色域广、工作电压低、可柔性等特点，其被认为是最具潜力的新型显示面板。其中，利用OLED显示面板的可柔性即可实现具有固定曲面的显示装置以及可折叠的显示装置。另外，柔性OLED显示面板可通过接垫弯曲工艺将扇出走线、绑定区、柔性印刷线路板（Flexible Print Circuit，FPC）等结构反折到显示屏体的背侧并进行固定，以减小柔性OLED显示装置的边框尺寸，实现高屏占比。
然而，随着柔性OLED显示装置边框尺寸的减小，柔性OLED显示装置的显示区边缘出现了气泡，严重影响柔性OLED显示装置的品质。
 发明概述
本申请提供一种显示模组和显示装置，以缓解柔性OLED显示装置的显示区边缘存在气泡的技术问题。
本申请提供的技术方案如下：
第一方面，本申请实施例提供一种显示模组，其包括显示区以及位于所述显示区外侧的边框区；所述显示模组还包括：
显示面板，具有相对的出光侧和非出光侧，所述显示面板包括第一平面部、第二平面部以及连接于所述第一平面部和所述第二平面部之间的弯折部，所述第二平面部通过所述弯折部弯折到所述第一平面部的非出光侧，所述弯折部位于所述边框区内；
第一保护层，设置于所述显示面板的所述出光侧；
遮光层，设置于所述第一保护层靠近所述显示面板的一侧，所述遮光层位于所述边框区内；
第一粘结层，设置于所述第一保护层与所述显示面板之间，所述第一粘结层位于所述显示区，并从所述显示区延伸至所述边框区内，所述第一粘结层与至少部分所述遮光层重叠且接触；
其中，与所述遮光层重叠的所述第一粘结层还与至少部分所述弯折部重叠。
第二方面，本申请实施例还提供一种显示装置，其包括前述实施例的显示模组。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例前序部分提供的显示模组的部分剖面结构示意图。
图2为本申请实施例提供的显示模组的第一种剖面结构示意图。
图3为本申请实施例提供的显示模组的第二种剖面结构示意图。
图4为本申请实施例提供的显示模组的第三种剖面结构示意图。
图5为本申请实施例提供的显示模组的第四种剖面结构示意图。
图6为图5中显示模组的局部应力仿真数据图。
图7为本申请实施例提供的显示模组的第五种剖面结构示意图。
图8为本申请实施例提供的显示模组的第六种剖面结构示意图。
图9为图8中第二粘结层的局部俯视示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。在附图中，为了清晰理解和便于描述，夸大了一些层和区域的厚度。即附图中示出的每个组件的尺寸和厚度是任意示出的，但是本申请不限于此。
针对柔性OLED显示装置的显示区边缘存在气泡的问题，本申请的发明人在研究中发现：参照图1，显示模组包括显示面板10’、第一保护层21’、遮光层22’、第一粘结层23’、偏光片30’以及第一胶层40’，显示区边缘存在的气泡500’主要集中在遮光层22’与第一保护层21’形成的断差处。发明人对此处形成气泡的原因进行进一步深入剖析，具体地，第一保护层21’通过第一粘结层23’贴附于偏光片30’上，偏光片30’贴附于显示面板10’上。显示面板10’包括第一平面部11’、第二平面部12’以及弯折部13’，显示面板10’为柔性显示面板，使得第二平面部12’能够通过弯折部13’弯折到显示面板10’的背面，以减小边框。第一胶层40’覆盖在弯折部13’的表面，以保护弯折部13’内的线路，第一胶层40’可为UV胶等。对于具有折叠功能的显示装置而言，在折叠的过程中，显示面板10’上方的膜层会发生位移，为了避免由于膜层位移导致与第一胶层40’发生干涉而产生膜层粘连，显示面板10’上方的膜层需要与第一胶层40’之间设置预留间隙，比如偏光片30’、第一粘结层23’均在水平方向上与第一胶层40’设置预留间隙。但是，该预留间隙的存在不利于实现边框的减小，而为了实现进一步减小边框的尺寸，就需要减小该预留间隙的大小。为此，可减小第一粘结层23’的覆盖长度，使第一粘结层23’内缩于偏光片30’。
然而，第一粘结层23’的内缩会导致第一粘结层23’不能很好地覆盖在遮光层22’与第一保护层21’的断差处，使得第一粘结层23’不能有效填补遮光层22’与第一保护层21’之间的断差，进而使得第一粘结层23’在该断差位置形成气泡500’，而气泡500’的存在严重影响产品的品质。而且，第一粘结层23’甚至还会内缩到遮光层22’的内圈，也即第一粘结层23’与遮光层22’不存在重叠的部分，此时还会导致在正视显示装置时，能够看到第一粘结层23’的膜层边界，导致漏边。
为此，本申请提供一种显示模组和显示装置。
在一种实施例中，本申请提供一种显示模组，其包括显示区以及位于所述显示区外侧的边框区；所述显示模组还包括：
显示面板，具有相对的出光侧和非出光侧，所述显示面板包括第一平面部、第二平面部以及连接于所述第一平面部和所述第二平面部之间的弯折部，所述第二平面部通过所述弯折部弯折到所述第一平面部的非出光侧，所述弯折部位于所述边框区内；
第一保护层，设置于所述显示面板的所述出光侧；
遮光层，设置于所述第一保护层靠近所述显示面板的一侧，所述遮光层位于所述边框区内；
第一粘结层，设置于所述第一保护层与所述显示面板之间，所述第一粘结层位于所述显示区，并从所述显示区延伸至所述边框区内，所述第一粘结层与至少部分所述遮光层重叠且接触；
其中，与所述遮光层重叠的所述第一粘结层还与至少部分所述弯折部重叠。
在一种实施例中，所述显示模组还包括：
第一胶层，所述第一胶层至少覆盖在所述弯折部上；
第一隔离层，所述第一隔离层设置于所述第一胶层远离所述弯折部的一侧，所述第一隔离层远离所述第一胶层一侧的表面粘性小于所述第一胶层的表面粘性。
在一种实施例中，所述第一隔离层的弹性模量小于所述第一胶层的弹性模量。
在一种实施例中，所述显示模组还包括：
第二保护层，设置于所述第一保护层靠近所述显示面板的一侧，所述第一粘结层位于所述第二保护层和所述第一保护层之间；
第二粘结层，设置于所述第二保护层靠近所述显示面板的一侧，所述第二粘结层位于所述显示区，并从所述显示区延伸至所述边框区内；
其中，所述第二粘结层与至少部分所述遮光层重叠，且与所述遮光层重叠的所述第二粘结层还与至少部分所述弯折部重叠。
在一种实施例中，与所述遮光层重叠的所述第一粘结层的宽度大于与所述遮光层重叠的所述第二粘结层的宽度。
在一种实施例中，所述显示模组还包括：
第一胶层，所述第一胶层至少覆盖在所述弯折部上；
第二隔离层，所述第二隔离层设置于所述第一胶层远离所述弯折部的一侧，所述第二隔离层远离所述第一胶层一侧的表面粘性小于所述第一胶层的表面粘性。
在一种实施例中，所述第二隔离层的弹性模量小于所述第一胶层的弹性模量。
在一种实施例中，所述第二粘结层从所述显示区延伸至所述边框区内，且延伸至所述边框区内的所述第二粘结层至少覆盖在所述弯折部上。
在一种实施例中，所述显示模组还包括彩膜层，所述彩膜层设置于所述显示面板的出光侧，所述第二粘结层覆盖在所述彩膜层上，并从所述彩膜层上延伸至所述弯折部上。
在一种实施例中，所述显示模组还包括第三隔离层，所述第三隔离层设置于所述第二粘结层远离所述弯折部的一侧；其中，所述第三隔离层远离所述第二粘结层一侧的表面粘性小于所述第二粘结层的表面粘性。
在一种实施例中，所述第三隔离层的弹性模量小于所述第二粘结层的弹性模量。
在一种实施例中，所述第一平面部包括靠近所述弯折部的第一子部，所述第一子部位于所述边框区内，所述第二粘结层还覆盖在所述第一子部上，所述第三隔离层还设置于所述第二粘结层远离所述第一子部的一侧；其中，与所述第一子部重叠的所述第三隔离层设置有第一镂空结构。
在一种实施例中，覆盖在所述弯折部上的所述第二粘结层的表面粘性小于位于所述第二保护层与所述显示面板之间的所述第二粘结层的表面粘性。
在一种实施例中，所述第一平面部包括靠近所述弯折部的第一子部，所述第一子部位于所述边框区内，所述第二粘结层还覆盖在所述第一子部上；其中，覆盖在所述第一子部上的所述第二粘结层设置有第二镂空结构。
在一种实施例中，所述第二保护层的外边界与所述第一保护层的外边界平齐。
在一种实施例中，所述显示面板在第一平面上的正投影位于所述第一保护层在所述第一平面上的正投影的范围内，且所述第一保护层的正投影面积大于所述显示面板的正投影面积；其中，所述第一平面平行于所述显示面板的出光侧表面。
在一种实施例中，所述第一粘结层的外边界与所述第一保护层的外边界平齐。
在一种实施例中，本申请还提供一种显示装置，其包括前述实施例其中之一的显示模组。
本申请提供的显示模组和显示装置中，显示模组包括显示区以及位于所述显示区外侧的边框区；所述显示模组还包括显示面板、第一保护层、遮光层以及第一粘结层，第一保护层设置于所述显示面板的出光侧；遮光层设置于所述第一保护层靠近所述显示面板的一侧，所述遮光层位于所述边框区内，第一粘结层设置于所述第一保护层与所述显示面板之间，所述第一粘结层位于所述显示区，并从所述显示区延伸至所述边框区内，所述第一粘结层与至少部分所述遮光层重叠且接触，而且与所述遮光层重叠的所述第一粘结层还与显示面板的至少部分弯折部重叠，以增大第一粘结层与遮光层的重叠面积，使第一粘结层能够填补遮光层与第一保护层之间的断差，降低第一粘结层在该断差位置形成气泡的风险，从而改善柔性OLED显示装置的显示区边缘存在气泡的问题。
下面将结合附图以及具体的实施方式详细说明本申请的显示模组和显示装置。
请参照图1和图2，图2为本申请实施例提供的显示模组的第一种剖面结构示意图。参照图2，显示模组100包括显示区AA以及位于所述显示区AA外侧的边框区BA，所述显示区AA用于显示画面，所述边框区BA用于设置绑定结构、外围电路等。具体地，所述显示面板10包括柔性有机发光二极管（Organic Light Emitting Diode，OLED）显示面板10等，则所述显示面板10可包括衬底以及依次层叠设置在所述衬底上的驱动电路层、发光功能层以及封装层。所述驱动电路层设置有驱动电路，所述发光功能层设置有发光器件，驱动电路用于驱动发光器件发光，所述封装层用于保护发光器件，避免水氧侵入导致发光器件失效。柔性有机发光二极管显示面板10具有可柔性的特性，使得所述显示面板10能够实现弯曲或折叠。
所述显示面板10包括第一平面部11、第二平面部12以及连接于所述第一平面部11和所述第二平面部12之间的弯折部13，所述第二平面部12通过所述弯折部13弯折到所述第一平面部11远离所述第一保护层21的一侧，至少部分所述弯折部13位于所述边框区BA内，所述第一平面部11至少位于所述显示区AA内。所述第二平面部12以及所述弯折部13上设置有绑定线路，通过将所述第二平面部12弯折到所述显示面板10的非出光侧，可使外部电路与所述第二平面部12上的绑定线路在所述显示面板10的非出光侧进行绑定，从而可减小绑定所述外部电路占用的边框区BA面积。
所述显示模组100还包括显示面板10、第一保护层21、遮光层22以及第一粘结层23。所述显示面板10具有相对的出光侧和非出光侧，所述出光侧即所述显示面板10显示画面的一侧，所述非出光侧即所述显示面板10上背离所述出光侧的一侧。所述第一保护层21设置于所述显示面板10的所述出光侧，所述第一保护层21位于所述显示区AA内，并从所述显示区AA延伸至所述边框区BA内。所述遮光层22设置于所述第一保护层21靠近所述显示面板10的一侧，所述遮光层22位于所述边框区BA。所述第一粘结层23设置于所述第一保护层21与所述显示面板10之间，所述第一粘结层23位于所述显示区AA内，并从所述显示区AA延伸至所述边框区BA内，所述第一粘结层23与至少部分所述遮光层22重叠且接触。而且，与所述遮光层22重叠的所述第一粘结层23还与至少部分所述弯折部13重叠。其中，本申请中两个结构重叠是指两个结构在特定平面上的正投影具有重合的部分，比如与所述遮光层22重叠的所述第一粘结层23还与至少部分所述弯折部13重叠是指所述第一粘结层23在特定平面上的正投影与至少部分所述弯折部13在特定平面上的正投影具有重合的部分，所述特定平面平行于所述显示面板10的出光侧表面。
在本实施例中，通过使所述第一粘结层23从所述显示区AA延伸至所述边框区BA内，并与至少部分所述遮光层22重叠且接触，且与所述遮光层22重叠的所述第一粘结层23还与至少部分所述弯折部13重叠，以增大第一粘结层23与遮光层22的重叠面积，使第一粘结层23能够填补遮光层22与第一保护层21之间的断差，降低第一粘结层23在该断差位置形成气泡的风险，从而改善柔性OLED显示装置的显示区AA边缘存在气泡的问题。而且，通过增大第一粘结层23与遮光层22的重叠面积，还能避免所述第一粘结层23内缩在所述遮光层22的内圈导致的漏边问题。
可选地，为了保护所述弯折部13上的绑定线路，所述显示模组100还包括第一胶层40，所述第一胶层40至少覆盖在所述弯折部13上。当然地，为了更好地的保护绑定线路，所述第一胶层40还可从所述弯折部13上延伸至部分所述第一平面部11以及部分所述第二平面部12上。比如，所述第一平面部11包括靠近所述弯折部13的第一子部111，所述第一子部111位于所述边框区BA内，所述第一胶层40还覆盖在部分所述第一子部111上。所述第三保护部的材料包括UV胶等。
在一种实施例中，所述显示模组100还包括第一隔离层60，所述第一隔离层60设置于所述第一胶层40远离所述弯折部13的一侧，所述第一隔离层60远离所述第一胶层40一侧的表面粘性小于所述第一胶层40的表面粘性。所述第一隔离层60的弹性模量小于所述第一胶层40的弹性模量，避免在所述第一胶层40上设置所述第一隔离层60时影响所述弯折部13的弯折性能。所述第一隔离层60覆盖在所述第一胶层40远离所述弯折部13一侧的表面上，可选地，所述第一隔离层60至少覆盖在所述第一胶层40与所述第一保护层21重叠的区域上，以隔离所述第一胶层40与所述第一保护层21，避免所述第一胶层40与所述第一保护层21发生粘连。所述第一隔离层60的厚度小于所述第一胶层40与所述第一保护层21之间的间隔距离。所述第一隔离层60可以为单面胶带、弱粘性膜或无粘涂层等。
可选地，为了支撑所述显示面板10以及固定弯折到所述显示面板10的非出光侧的所述第二平面部12，所述显示模组100还包括背板51、缓冲层52、辅助支撑层53以及第三粘结层54等。所述背板51设置于所述显示面板10的非出光侧，并与所述显示面板10贴合。所述背板51在对应所述弯折部13的位置断开，使得所述背板51呈两段式设置。即所述背板51包括第一子背板511和第二子背板512，所述第一子背板511对应所述第一平面部11设置，所述第二子背板512对应所述第二平面部12设置。所述背板51的材料包括聚对苯二甲酸乙二醇酯（Poly ethylene terephthalate，PET）等。
所述缓冲层52设置于所述第一子背板511远离所述第一平面部11的一侧，所述缓冲层52的材料包括聚酰亚胺（Polyimide，PI）等。所述辅助支撑层53设置于所述缓冲层52远离所述第一子背板511的一侧，所述辅助支撑层53的材料包括不锈钢（如SUS）等，采用不锈钢设计的辅助支撑层53，能够使所述显示面板10满足动态弯折的需求，所述不锈钢能够保证所述显示面板10动态弯折时的弯折形态。所述第三粘结层54设置于所述辅助支撑层53与所述第二子背板512之间，所述第二子背板512通过所述第三粘结层54与所述辅助支撑层53固定。所述第三粘结层54可以为双面胶等。
可选地，当所述显示模组100应用在折叠显示装置时，所述辅助支撑层53在对应折叠区的位置设置有应力释放区530。所述辅助支撑层53在所述应力释放区530设置有镂空结构，以释放在折叠过程中产生的应力。而为了避免灰尘、杂物粒子等通过所述辅助支撑层53上的镂空结构进入到所述显示模组100内，所述显示模组100还包括第四保护层55，所述第四保护层55设置于所述辅助支撑层53远离所述缓冲层52的一侧，并对应所述应力释放区530设置。所述第四保护层55还能够对所述应力释放区530的所述辅助支撑层53进行结构补强。所述第四保护层55可以为单面胶带等。
可选地，所述显示模组100还包括设置在所述显示面板10的出光侧的偏光片30，所述偏光片30用于降低所述显示模组100的反射率。所述偏光片30对应所述第一平面部11设置。可选地，所述偏光片30位于所述显示区AA内，并从所述显示区AA延伸至所述边框区BA内。所述偏光片30与所述第一胶层40之间设置有预留间隙，使得本申请的所述显示模组100可应用在折叠显示装置中。
所述第一保护层21设置在所述偏光片30远离所述显示面板10的一侧，所述第一粘结层23设置在所述第一保护层21靠近所述偏光片30的一侧。所述第一保护层21用于保护所述显示面板10以及所述偏光片30。所述第一保护层21可由聚酰亚胺、聚对苯二甲酸乙二醇酯、超薄玻璃（Ultra thin glass ，UTG）等形成的层。所述第一粘结层23的材料包括透明光学胶，如OCA等。
所述第一保护层21和所述第一粘结层23均位于所述显示区AA内，并从所述显示区AA延伸至所述边框区BA内。所述遮光层22设置在所述第一保护层21靠近所述偏光片30的一侧，并位于所述边框区BA内。所述遮光层22的外边界220与所述第一保护层21的外边界210平齐。所述遮光层22的材料包括遮光油墨等，所述遮光层22用于对所述边框区BA进行遮光，避免所述边框区BA内的结构露出。
延伸至所述边框区BA内的所述第一粘结层23与所述遮光层22重叠且接触，且与所述遮光层22重叠的所述第一粘结层23还与至少部分所述弯折部13重叠，以增大第一粘结层23与遮光层22的重叠面积，比如在所述显示区AA指向所述边框区BA的方向上，与所述遮光层22重叠的所述第一粘结层23的宽度大于或等于0.2毫米，比如与所述遮光层22重叠的所述第一粘结层23的宽度为0.21毫米、0.22毫米、0.23毫米、0.25毫米、0.28毫米、0.3毫米、0.35毫米、0.4毫米、0.5毫米、0.6毫米、0.7毫米等。
如此，通过增大第一粘结层23与遮光层22的重叠面积，使所述第一粘结层23在所述遮光层22上具有足够的覆盖面积，进而使第一粘结层23能够填补遮光层22与第一保护层21之间的断差，降低第一粘结层23在该断差位置形成气泡的风险，从而改善柔性OLED显示装置的显示区AA边缘存在气泡的问题。
在一种实施例中，所述显示面板10在第一平面上的正投影位于所述第一保护层21在所述第一平面上的正投影的范围内，且所述第一保护层21的正投影面积大于所述显示面板10的正投影面积；其中，所述第一平面平行于所述显示面板10的出光侧表面，也即，所述第一平面即为上述所述的特定平面。换而言之，在正视所述显示模组100的视角下，所述第一保护层21与所述显示面板10重叠，且所述第一保护层21的外边界210超出所述显示面板10的外边界120，也即所述第一保护层21向所述边框区BA延伸较大的长度，使所述第一保护层21能够直接与所述显示模组100的中框接触并固定，进而使所述第一保护层21能够替代所述显示模组100的前框，提高所述显示模组100表面的平整度。
在一种实施例中，所述第一粘结层23的外边界230与所述第一保护层21的外边界210平齐，以进一步增大所述第一粘结层23与所述遮光层22的重叠面积，从而可进一步降低第一粘结层23在该断差位置形成气泡的风险，从而进一步改善柔性OLED显示装置的显示区AA边缘存在气泡的问题。
在一种实施例中，请参照图1至图3，图3为本申请实施例提供的显示模组的第二种剖面结构示意图。与上述实施例不同的是，参照图3，所述显示模组100还包括第二保护层24和第二粘结层25。所述第二保护层24设置于所述第一保护层21靠近所述显示面板10的一侧，所述第一粘结层23位于所述第二保护层24和所述第一保护层21之间，所述第一保护层21通过所述第一粘结层23与所述第二保护层24贴合。所述第二粘结层25设置于所述第二保护层24靠近所述显示面板10的一侧，所述第二粘结层25位于所述显示区AA，并从所述显示区AA延伸至所述边框区BA。所述第二保护层24通过所述第二粘结层25与所述偏光片30贴合。所述第二保护层24、所述第二粘结层25均与所述第一胶层40之间设置有预留间隙。在正视所述显示模组100的视角下，所述第二粘结层25与至少部分所述遮光层22重叠，以避免所述第二粘结层25漏边。可选地，与所述遮光层22重叠的所述第二粘结层25还与至少部分所述弯折部13重叠，且与所述遮光层22重叠的所述第一粘结层23的宽度大于与所述遮光层22重叠的所述第二粘结层25的宽度。
可选地，所述第二保护层24可由聚酰亚胺、聚对苯二甲酸乙二醇酯、超薄玻璃（Ultra thin glass ，UTG）等形成的层。所述第二保护层24与所述第一保护层21不同，比如所述第一保护层21为由聚酰亚胺形成的层，所述第二保护层24为由聚对苯二甲酸乙二醇酯或超薄玻璃形成的层。所述第二粘结层25的材料可与所述第一粘结层23的材料相同，比如均为透明光学胶，如OCA等。其他说明请参照上述实施例，在此不再赘述。
在一种实施例中，请参照图1至图4，图4为本申请实施例提供的显示模组100的第三种剖面结构示意图。参照图4，与上述实施例不同的是，所述第二保护层24的外边界与所述第一保护层21的外边界210平齐，也即所述第二保护层24也向所述边框区BA延伸较大的长度，与所述第一保护层21结合共同替代前框。所述第二保护层24能够对所述第一保护层21进行结构补强，提高所述第一保护层21替代前框的结构稳定性。其他说明请参照上述实施例，在此不再赘述。
在一种实施例中，请参照图1至图6，图5为本申请实施例提供的显示模组100的第四种剖面结构示意图，图6为图5中显示模组100的局部应力仿真数据图。参照图5，与上述实施例不同的是，所述显示模组100还包括第二隔离层61，所述第二隔离层61设置于所述第一胶层40远离所述弯折部13的一侧，所述第二隔离层61远离所述第一胶层40一侧的表面粘性小于所述第一胶层40的表面粘性。
具体地，所述第二隔离层61覆盖在所述第一胶层40远离所述弯折部13一侧的表面上，可选地，所述第二隔离层61至少覆盖在所述第一胶层40与所述第二保护层24重叠的区域上，以隔离所述第一胶层40与所述第二保护层24，避免所述第一胶层40与所述第二保护层24发生粘连。所述第二隔离层61的厚度小于所述第一胶层40与所述第二保护层24之间的间隔距离。所述第二隔离层61可以为单面胶带、弱粘性膜或无粘涂层等。
需要说明的是，对于在所述第一胶层40的表面设置第二隔离层61的方案，是本申请的发明人经过深入研究得出的。因为覆盖在弯折部13上的第一胶层40对于弯折部13上的弯折应力发挥着至关重要的作用，改动第一胶层40的结构很可能会影响弯折部13上的弯折应力，为了不影响弯折部13上的弯折应力，通常会将第二隔离层61设置在靠近第一胶层40的膜层上，比如设置在第二保护层24面向所述第一胶层40的表面上。但本申请的发明人突破常规思维，将第二隔离层61设置在第一胶层40的表面上，以解决避免所述第一胶层40与所述第二保护层24发生粘连的问题，并通过仿真模拟发现：通过在所述第一胶层40上设置所述第二隔离层61，不仅没有影响弯折部13上的弯折应力，反而在一定程度上降低了弯折部13上的弯折应力，进而降低了所述显示面板10的局部应力。
具体地，参照图6，图6中最左侧区域的一个柱状为未在所述第一胶层40上设置所述第二隔离层61时，所述显示面板10的弯折部13上的局部应力数据；图6中中间区域的三个柱状为在所述第一胶层40上设置10微米厚度的所述第二隔离层61时所述显示面板10的弯折部13上的局部应力数据，其中，图中的500、1000、1500是指所述第二隔离层61的弹性模量，单位是Mpa；图6中最右侧区域的三个柱状为在所述第一胶层40上设置30微米厚度的所述第二隔离层61时所述显示面板10的弯折部13上的局部应力数据，其中，图中的500、1000、1500是指所述第二隔离层61的弹性模量，单位是Mpa。从图6中可以看出，通过在所述第一胶层40上设置一定厚度的所述第二隔离层61，所述第二隔离层61的弹性模量小于所述第一胶层40的弹性模量，能够降低所述显示面板10上所述弯折部13的局部应力，使所述显示面板10上所述弯折部13的局部应力大致降低0.8%左右；而且，随着所述第二隔离层61的厚度以及弹性模量的增大，降低应力的效果越好，但是所述第二隔离层61的厚度应小于所述第一胶层40与其上方膜层之间的间隙，避免所述第二隔离层61与所述第一胶层40上方的膜层发生干涉，比如，本申请实施例控制所述第二隔离层61的厚度小于0.1毫米，在实现避免所述第一胶层40与所述第二保护层24发生粘连的同时，还能避免所述第二隔离层61与所述第二保护层24发生干涉。其他说明请参照上述实施例，在此不再赘述。
在一种实施例中，请参照图1至图7，图7为本申请实施例提供的显示模组100的第五种剖面结构示意图。参照图7，与上述实施例不同的是，所述第二粘结层25从所述显示区AA延伸至所述边框区BA内，并至少覆盖在所述弯折部13上，以替代所述第一胶层40。
具体地，所述显示模组100还包括彩膜层31，所述彩膜层31设置于所述显示面板10的出光侧，所述第二粘结层25覆盖在所述彩膜层31上，并延伸至所述弯折部13上。所述彩膜层31至少位于所述显示区AA内，可选地，所述彩膜层31还从所述显示区AA延伸至所述边框区BA内。所述彩膜层31可包括图案化的黑矩阵（Black Matrix，BM）以及设置在图案化的黑矩阵开口内的红色色阻、蓝色色阻以及绿色色阻。通过采用所述彩膜层31替代所述偏光片30，能够减薄所述显示模组100的厚度，并提高所述显示面板10的出光率，从而降低能耗。
所述第二粘结层25覆盖在所述彩膜层31上，并延伸至所述弯折部13上，以替代所述第一胶层40，从而可消除所述第一胶层40与所述偏光片30以及所述第二保护层24之间的预留间隙，减小所述显示模组100的边框区BA宽度，比如可减小所述显示模组100的边框区BA宽度至少0.3毫米以上，以实现更窄的边框。其中，所述第二粘结层25还覆盖在部分所述第一平面部11以及部分所述第二平面部12上。当所述显示模组100应用到折叠显示装置时，所述第二粘结层25可采用可折叠的OCA胶。其他说明请参照上述实施例，在此不再赘述。
在一种实施例中，请参照图1至图9，图8为本申请实施例提供的显示模组100的第六种剖面结构示意图，图9为图8中第二粘结层25的局部俯视示意图。参照图8，与上述实施例不同的是，所述显示模组100还包括第三隔离层62，所述第三隔离层62设置于所述第二粘结层25远离所述弯折部13的一侧；其中，所述第三隔离层62远离所述第二粘结层25一侧的表面粘性小于所述第二粘结层25的表面粘性。
具体地，所述第三隔离层62覆盖在所述第二粘结层25远离所述弯折部13一侧的表面上，可选地，所述第三隔离层62至少覆盖在所述边框区BA内所述第二粘结层25与所述第一粘结层23重叠的区域上，以隔离所述第二粘结层25与所述第一粘结层23，避免所述第二粘结层25与所述第一粘结层23发生粘连。所述第三隔离层62的厚度小于所述第二粘结层25与所述第一粘结层23之间的间隔距离。所述第三隔离层62的弹性模量小于所述第二粘结层25的弹性模量，避免在所述第二粘结层25上设置所述第三隔离层62时影响所述弯折部13的弯折性能。所述第三隔离层62可以为绝缘胶带、单面胶带、弱粘性膜或无粘涂层等。
在另一种实施例中，还可对位于所述边框区BA内且覆盖在所述弯折部13上的所述第二粘结层25进行光固化或半固化，以降低覆盖在所述弯折部13上的所述第二粘结层25的粘性，以使覆盖在所述弯折部13上的所述第二粘结层25的表面粘性小于位于所述第二保护层24与所述显示面板10之间的所述第二粘结层25的表面粘性，从而无需再额外设置所述第三隔离层62。
可选地，参照图9，所述第一平面部11包括靠近所述弯折部13的第一子部111，所述第一子部111位于所述边框区BA内，所述第二粘结层25还覆盖在所述第一子部111上。覆盖在所述第一子部111上的所述第二粘结层25设置有第二镂空结构250，以释放在弯折所述弯折部13时所述第一子部111所受的应力。所述镂空结构250的形状可以为椭圆形、圆形、方形、菱形、矩形等规则或不规则的图形。所述镂空结构的排布可以在列方向或行方向上相对或交错设置。在所述显示区AA指向所述边框区BA的方向上，所述第二镂空结构250的排布密度逐渐增大。在其他一些实施例中，所述第二镂空结构250还可设置在对应所述弯折部13的所述第二粘结层25上。
在其他一些实施例中，所述第一平面部11包括靠近所述弯折部13的第一子部111，所述第一子部111位于所述边框区BA内，所述第二粘结层25还覆盖在所述第一子部111上，所述第三隔离层62还设置于所述第二粘结层25远离所述第一子部111的一侧。其中，与所述第一子部111重叠的所述第三隔离层62设置有第一镂空结构，所述第一镂空结构同样能够释放在弯折所述弯折部13时所述第一子部111所受的应力。其他说明请参照上述实施例，在此不再赘述。
基于同一发明构思，本申请实施例还提供一种显示装置，所述显示装置包括前述实施例其中之一所述的显示模组100。
根据上述实施例可知：
本申请提供一种显示模组和显示装置中，显示模组包括显示区以及位于所述显示区外侧的边框区；所述显示模组还包括显示面板、第一保护层、遮光层以及第一粘结层，第一保护层设置于所述显示面板的出光侧；遮光层设置于所述第一保护层靠近所述显示面板的一侧，所述遮光层位于所述边框区内，第一粘结层设置于所述第一保护层与所述显示面板之间，所述第一粘结层位于所述显示区，并从所述显示区延伸至所述边框区内，第一粘结层与至少部分所述遮光层远离重叠且接触，而且与所述遮光层重叠的所述第一粘结层还与显示面板的至少部分弯折部重叠，以增大第一粘结层与遮光层的重叠面积，使第一粘结层能够填补遮光层与第一保护层之间的断差，降低第一粘结层在该断差位置形成气泡的风险，从而改善柔性OLED显示装置的显示区边缘存在气泡的问题。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (18)

  1. 一种显示模组，其包括显示区以及位于所述显示区外侧的边框区；所述显示模组还包括：
    显示面板，具有相对的出光侧和非出光侧，所述显示面板包括第一平面部、第二平面部以及连接于所述第一平面部和所述第二平面部之间的弯折部，所述第二平面部通过所述弯折部弯折到所述第一平面部的非出光侧，所述弯折部位于所述边框区内；
    第一保护层，设置于所述显示面板的所述出光侧；
    遮光层，设置于所述第一保护层靠近所述显示面板的一侧，所述遮光层位于所述边框区内；
    第一粘结层，设置于所述第一保护层与所述显示面板之间，所述第一粘结层位于所述显示区，并从所述显示区延伸至所述边框区内，所述第一粘结层与至少部分所述遮光层重叠且接触；
    其中，与所述遮光层重叠的所述第一粘结层还与至少部分所述弯折部重叠。
  2. 根据权利要求1所述的显示模组，其中，所述显示模组还包括：
    第一胶层，所述第一胶层至少覆盖在所述弯折部上；
    第一隔离层，所述第一隔离层设置于所述第一胶层远离所述弯折部的一侧，所述第一隔离层远离所述第一胶层一侧的表面粘性小于所述第一胶层的表面粘性。
  3. 根据权利要求2所述的显示模组，其中，所述第一隔离层的弹性模量小于所述第一胶层的弹性模量。
  4. 根据权利要求1所述的显示模组，其中，所述显示模组还包括：
    第二保护层，设置于所述第一保护层靠近所述显示面板的一侧，所述第一粘结层位于所述第二保护层和所述第一保护层之间；
    第二粘结层，设置于所述第二保护层靠近所述显示面板的一侧，所述第二粘结层位于所述显示区，并从所述显示区延伸至所述边框区内；
    其中，所述第二粘结层与至少部分所述遮光层重叠，且与所述遮光层重叠的所述第二粘结层还与至少部分所述弯折部重叠。
  5. 根据权利要求4所述的显示模组，其中，与所述遮光层重叠的所述第一粘结层的宽度大于与所述遮光层重叠的所述第二粘结层的宽度。
  6. 根据权利要求4所述的显示模组，其中，所述显示模组还包括：
    第一胶层，所述第一胶层至少覆盖在所述弯折部上；
    第二隔离层，所述第二隔离层设置于所述第一胶层远离所述弯折部的一侧，所述第二隔离层远离所述第一胶层一侧的表面粘性小于所述第一胶层的表面粘性。
  7. 根据权利要求6所述的显示模组，其中，所述第二隔离层的弹性模量小于所述第一胶层的弹性模量。
  8. 根据权利要求4所述的显示模组，其中，所述第二粘结层从所述显示区延伸至所述边框区内，且延伸至所述边框区内的所述第二粘结层至少覆盖在所述弯折部上。
  9. 根据权利要求8所述的显示模组，其中，所述显示模组还包括彩膜层，所述彩膜层设置于所述显示面板的出光侧，所述第二粘结层覆盖在所述彩膜层上，并从所述彩膜层上延伸至所述弯折部上。
  10. 根据权利要求8所述的显示模组，其中，所述显示模组还包括第三隔离层，所述第三隔离层设置于所述第二粘结层远离所述弯折部的一侧；其中，所述第三隔离层远离所述第二粘结层一侧的表面粘性小于所述第二粘结层的表面粘性。
  11. 根据权利要求10所述的显示模组，其中，所述第三隔离层的弹性模量小于所述第二粘结层的弹性模量。
  12. 根据权利要求10所述的显示模组，其中，所述第一平面部包括靠近所述弯折部的第一子部，所述第一子部位于所述边框区内，所述第二粘结层还覆盖在所述第一子部上，所述第三隔离层还设置于所述第二粘结层远离所述第一子部的一侧；其中，与所述第一子部重叠的所述第三隔离层设置有第一镂空结构。
  13. 根据权利要求8所述的显示模组，其中，覆盖在所述弯折部上的所述第二粘结层的表面粘性小于位于所述第二保护层与所述显示面板之间的所述第二粘结层的表面粘性。
  14. 根据权利要求8所述的显示模组，其中，所述第一平面部包括靠近所述弯折部的第一子部，所述第一子部位于所述边框区内，所述第二粘结层还覆盖在所述第一子部上；其中，覆盖在所述第一子部上的所述第二粘结层设置有第二镂空结构。
  15. 根据权利要求4所述的显示模组，其中，所述第二保护层的外边界与所述第一保护层的外边界平齐。
  16. 根据权利要求1至15中任一项所述的显示模组，其中，所述显示面板在第一平面上的正投影位于所述第一保护层在所述第一平面上的正投影的范围内，且所述第一保护层的正投影面积大于所述显示面板的正投影面积；其中，所述第一平面平行于所述显示面板的出光侧表面。
  17. 根据权利要求1至15中任一项所述的显示模组，其中，所述第一粘结层的外边界与所述第一保护层的外边界平齐。
  18. 一种显示装置，其包括如权利要求1至17中任一项所述的显示模组。
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CN115775500A (zh) * 2022-11-25 2023-03-10 武汉华星光电半导体显示技术有限公司 显示装置及移动终端
CN115776834A (zh) * 2022-11-28 2023-03-10 京东方科技集团股份有限公司 一种显示面板、制备方法及显示装置
CN116367595A (zh) * 2023-03-31 2023-06-30 维信诺科技股份有限公司 一种显示模组及其制备方法、电子设备

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