Display module and display device

Abstract

The utility model discloses a display module and a display device. The display module comprises a display panel, wherein the display panel comprises a display area and a non-display area; the adhesive layer comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is located on one side of the display area, and the second adhesive layer is located on one side of the non-display area; the polarizing layer is located between the display area and the first adhesive layer, part of the first adhesive layer extends out of the polarizing layer in the first direction, and the projection of the first adhesive layer in the second direction covers the polarizing layer and at least part of the second adhesive layer; wherein the first direction is the direction from the first adhesive layer to the second adhesive layer, and the second direction is the thickness direction of the display panel. According to the display module, the water vapor invasion path is prolonged, even if the first adhesive layer and the second adhesive layer are heated to shrink in the long-term use process, water vapor can still be isolated, the water vapor is effectively prevented from invading the display panel, and the reliability of the display panel is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to display technical field, especially display module and display device. BACKGROUND

[0002] In recent years, the flexible packaging display panel has been more and more widely applied because of its thickness advantage.

[0003] However, in the long-term use process or in the reliability test process, the flexible packaging display panel will cause the gap between the polaroid and the UV glue in the display module due to the heat shrinkage of the polaroid and the UV glue, the water vapor will enter from the gap, and the water vapor will react with the inorganic film layer in the display panel, so that the flexible packaging failure is easy to occur, the panel circuit is corroded and the packaging is failed, the display screen picture is abnormal, or the display screen is abnormal. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of display module and display device, to realize effectively prevent water vapor invasion display panel, improve the reliability of display panel.

[0005] In the first aspect, the utility model embodiment provides a kind of display module, comprising;

[0006] Display panel, including display area and non-display area;

[0007] Glue layer, including first glue layer and second glue layer, the first glue layer is located in one side of the display area, and the second glue layer is located in one side of the non-display area;

[0008] Polaroid, the polaroid is located between the display area and the first glue layer, part of the first glue layer extends out the polaroid in first direction, and the projection of the first glue layer in second direction covers the polaroid and at least part of the second glue layer;Wherein, the first direction is the direction that the first glue layer is directed to the second glue layer, and the second direction is the thickness direction of the display panel.

[0009] Optionally, the length that the first glue layer extends out the polaroid in the first direction is at least 130 μm.

[0010] Optionally, the first glue layer is OCA optical glue.

[0011] Optionally, the second glue layer is UV glue.

[0012] Optionally, the display panel further includes thin film packaging layer, touch protection layer and substrate;

[0013] The touch protection layer is arranged between the thin film encapsulation layer and the polarizing layer, and the thin film encapsulation layer is located between the touch protection layer and the substrate.

[0014] Optionally, lengths of the thin film encapsulation layer and the touch protection layer in the first direction are both less than a length of the substrate in the first direction.

[0015] Optionally, the display panel further comprises a barrier wall, the barrier wall is located in the thin film encapsulation layer, and the barrier wall is arranged around the display area.

[0016] Optionally, projections of the polarizing layer and the second adhesive layer in the second direction cover the touch protection layer.

[0017] Optionally, the display module further comprises a chip on film layer, the chip on film layer is arranged on an end surface of the non-display area in the display panel, and a projection of the second adhesive layer in the second direction covers part of the chip on film layer.

[0018] In a second aspect, the utility model embodiment further provides a display device, the display device includes the display module that any embodiment of the utility model is described.

[0019] The utility model discloses a display module, display module includes display panel, adhesive layer and polarizing layer, adhesive layer includes first adhesive layer and second adhesive layer, and polarizing layer is located between display area and first adhesive layer, and part first adhesive layer extends out polarizing layer in first direction, and the projection of first adhesive layer in second direction covers polarizing layer and at least part second adhesive layer, so that first adhesive layer and second adhesive layer overlap arrangement, thereby lengthens the water vapor invasion path, even if first adhesive layer and second adhesive layer are shrunk by heat in the long-term use process, still can insulate water vapor, effectively prevent water vapor from invading display panel, improve the reliability of display panel. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic diagram of the display module of the utility model embodiment.

[0021] Figure 2 It is Figure 1 It is a cross-sectional structure schematic diagram of the display module shown in the figure.

[0022] Figure 3 It is Figure 1 It is still another cross-sectional structure schematic diagram of the display module shown in the figure.

[0023] Figure 4 It is a structure schematic diagram of the display device in the utility model embodiment. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0025] In the prior art, the optical clear adhesive (OCA) on the upper layer of the polarizer (POL) in the flexible packaging display module does not cover the UV glue used for packaging the display module, but the POL and the UV glue will shrink under heat, and there will be a gap between the POL and the UV glue, water vapor will enter from the gap, react with the inorganic film layer in the display panel, and the flexible packaging will fail, causing corrosion of the panel circuit and packaging failure, resulting in abnormal display of the display screen, or abnormality such as color deficiency of the display screen.

[0026] To solve the related technical problems in the prior art, the utility model embodiment provides a display module, Figure 1 The structure diagram of the display module provided by the utility model embodiment, Figure 2 The cross-sectional structure diagram of the display module shown in Figure 1 The cross-sectional structure diagram of the display module shown in Figure 2 The cross-sectional structure diagram of the display module shown in Figure 1 The cross-sectional view of the display module 100 along the straight line AB, as shown in Figure 1 And Figure 2 The display module 100 includes: a display panel 10, including a display area AA and a non-display area NAA; a glue layer 30, including a first glue layer 301 and a second glue layer 302, the first glue layer 301 is located on one side of the display area AA, and the second glue layer 302 is located on one side of the non-display area 302; a polarizing layer 20, the polarizing layer 20 is located between the display area AA and the first glue layer 301, part of the first glue layer 301 extends out of the polarizing layer 20 in the first direction, and the projection of the first glue layer 301 in the second direction covers the polarizing layer 20 and at least part of the second glue layer 302; wherein, the first direction is the direction of the first glue layer 301 to the second glue layer 302, and the second direction is the thickness direction of the display panel 10.

[0027] Among them, as Figure 1As shown, the display panel 10 includes a display area AA and a non-display area NAA. The non-display area NAA is arranged around the display area AA. The glue layer 30 is arranged above the display panel 10, and the first glue layer 301 in the glue layer 30 is located on one side of the display area AA. The second glue layer 302 in the glue layer 30 is located on one side of the non-display area 302, thereby achieving coverage of the display panel 10, protecting the display panel 10, preventing the display panel 10 from being corroded by water vapor, and thus preventing the display module 100 from displaying abnormalities.

[0028] Specifically, a polarizing layer 20 is disposed between the adhesive layer 30 and the display panel 10. The polarizing layer 20 can suppress reflection interference from ambient light and improve the display quality of the display panel 10. The polarizing layer 20 is specifically disposed between the display area AA and the first adhesive layer 301. The thickness of the first adhesive layer 301 is smaller than that of the second adhesive layer 302. In the prior art, the first adhesive layer 301 and the second adhesive layer 302 are typically disposed in parallel, with the first adhesive layer 301 and the polarizing layer 20 having similar lengths. In related art, the first adhesive layer 301 and the second adhesive layer 302 do not overlap. When the first adhesive layer 301 and the second adhesive layer 302 undergo reliability testing or ageing, a gap may appear between the first adhesive layer 301 and the second adhesive layer 302. Water vapor may intrude through this gap, affecting the display quality of the display panel 10. Accordingly, in this embodiment, a portion of the first adhesive layer 301 extends beyond the polarizing layer 20 in the first direction. The projection of the first adhesive layer 301 in the second direction covers the polarizing layer 20 and at least a portion of the second adhesive layer 302. The second adhesive layer 302 is in contact with the polarizing layer 20, so that the first adhesive layer 301 partially covers the second adhesive layer 302, thereby extending the path for water vapor intrusion. Even if the first adhesive layer 301 and the second adhesive layer 302 shrink due to heat during long-term use, they can still isolate water vapor, effectively preventing water vapor from invading the display panel 10, avoiding poor display of the display module 100, and improving durability.

[0029] The utility model provides a display module, which includes a display panel, an adhesive layer and a polarizing layer. The adhesive layer includes a first adhesive layer and a second adhesive layer. The polarizing layer is located between the display area and the first adhesive layer. A portion of the first adhesive layer extends out of the polarizing layer in a first direction. The projection of the first adhesive layer in a second direction covers the polarizing layer and at least a portion of the second adhesive layer, so that the first adhesive layer and the second adhesive layer are overlapped, thereby extending the water vapor intrusion path. Even if the first adhesive layer and the second adhesive layer shrink due to heat during long-term use, they can still isolate water vapor, effectively prevent water vapor from invading the display panel, and improve the reliability of the display panel.

[0030] The present invention also provides a display module with another structure. Figure 3 for Figure 1 Another cross-sectional structural diagram of the display module shown in FIG. Figure 3 Also for Figure 1A cross-sectional view of the display module 100 along the straight line AB is shown in FIG. 1B. Figure 3 As shown, the first adhesive layer 301 extends at least 130 μm in the first direction beyond the length of the polarizing layer 20.

[0031] Specifically, the first adhesive layer 301 extends at least 130 μm in the first direction beyond the length of the polarizing layer 20, so that the first adhesive layer 301 covers the second adhesive layer 302 by at least 130 μm, and the first adhesive layer 301 and the second adhesive layer 302 are tightly attached, so that when the first adhesive layer 301 and the second adhesive layer 302 are subjected to reliability testing, the first adhesive layer 301 and the second adhesive layer 302 can still ensure that the first adhesive layer 301 covers the second adhesive layer 302 after shrinking under heat, so as to prevent water vapor from invading the display panel 10, thereby ensuring the display effect of the display module 100.

[0032] Optionally, the first adhesive layer 301 is OCA optical adhesive.

[0033] Specifically, the first adhesive layer 301 is OCA (Optically Clear Adhesive, optical transparent adhesive) optical adhesive, which can make the first adhesive layer 301 not affect the display effect of the display area AA in the display panel 10.

[0034] Optionally, the second adhesive layer 302 is UV adhesive.

[0035] Specifically, the second adhesive layer 302 is UV adhesive, which is ultraviolet curing adhesive and is cured by liquid adhesive using a UV light source. By covering the UV adhesive with OCA optical adhesive, the invasion path of water vapor can be prolonged, thereby preventing water vapor from invading the display panel 10.

[0036] Further, with reference to Figure 2 The display panel 10 further includes a thin film encapsulation layer 102, a touch protection layer 103, and a substrate 101; the touch protection layer 103 is disposed between the thin film encapsulation layer 102 and the polarizing layer 20, and the thin film encapsulation layer 102 is disposed between the touch protection layer 103 and the substrate 101; the projection of the adhesive layer 30 in the second direction covers the thin film encapsulation layer 102 and the touch protection layer 103.

[0037] Specifically, the thin film encapsulation layer TFE 102 uses an ultra-thin film to seal the OLED material in the display panel 10, so as to protect the OLED material from external moisture and oxygen, and plays a role of an encapsulation material. The touch protection layer 103 is an organic overcoat (OC). The touch protection layer 103 is arranged between the thin film encapsulation layer 102 and the polarizing layer 20, and the projection of the second adhesive layer 30 in the second direction covers the thin film encapsulation layer 102 and the touch protection layer 103, that is, the second adhesive layer 30 covers the thin film encapsulation layer 102 and the touch protection layer 103, so as to protect the touch protection layer 103 and the thin film encapsulation layer 102 in the display panel 10 from moisture.

[0038] Optionally, the lengths of the thin film encapsulation layer 102 and the touch protection layer 103 in the first direction are both less than the length of the substrate 101 in the first direction.

[0039] Specifically, the lengths of the thin film encapsulation layer 102 and the touch protection layer 103 in the first direction are both less than the length of the substrate 101 in the first direction, and the second adhesive layer 302 is in contact with the thin film encapsulation layer 102, the touch protection layer 103 and the polarizing layer 20, that is, the second adhesive layer 302 can encapsulate and protect the side surfaces of the thin film encapsulation layer 102, the touch protection layer 103 and the polarizing layer 20. Since the first adhesive layer 301 covers part of the second adhesive layer 302, the thin film encapsulation layer 102 and the touch protection layer 103 are double-protected. When the first adhesive layer 301 shrinks due to heat in a long-term use process, the first adhesive layer 301 still covers the second adhesive layer 302, so as to isolate the moisture, effectively prevent the moisture from invading the display panel 10, avoid the display module 100 from having a display defect, and improve the reliability of the display module 100.

[0040] Further, with reference to Figure 2 the projection of the polarizing layer 20 and the second adhesive layer 302 in the second direction covers the touch protection layer 103.

[0041] Specifically, the projection of the polarizing layer 20 and the second adhesive layer 302 in the second direction covers the touch protection layer 103, and the second adhesive layer 302 can cover the side surfaces and part of the appearance of the touch protection layer 103, so as to avoid the moisture from invading the touch protection layer 103.

[0042] The surface of the display panel of the flexible packaging product in the prior art is packaged with flexible material, and different types of glue materials are usually used in the bending area and the flat area of the display panel, for example, OCA glue is usually used in the flat area, and UV glue is usually used in the bending area. The UV glue in the bending area of the display panel needs to reserve enough gap with the edge of the OCA glue to avoid the UV glue riding on the OCA glue. In the long-term use process, the gap between the UV glue and the OCA glue is further expanded due to thermal shrinkage, water vapor enters from the gap, the display panel is eroded by water vapor, the flexible packaging fails, the display panel circuit is corroded and the packaging fails, and the display screen display and color loss are abnormal. The display module 100 in the flexible packaging product is provided with the first glue layer 301 exceeding the polarizing layer 20 and covering part of the second glue layer 302, that is, the OCA optical glue exceeds the polarizing layer 20 and covers the UV glue, so that the display module 100 can be used in the double 85 test and the long-term use process, and the OCA optical and UV glue can still realize the sealing of the display panel 10, prevent water vapor erosion, improve the sealing performance and waterproof performance of the flexible packaging product, and thus improve the service life of the flexible packaging product.

[0043] Further, with reference to Figure 2 , the display panel 10 further comprises a retaining wall 104; the retaining wall 104 is located in the thin film packaging layer 102, and the retaining wall 104 is arranged around the display area AA.

[0044] Specifically, in the TFE packaging technology, in order to avoid the phenomenon that the boundary of the thin film formed after the ink flows flat on the substrate 101 is uneven or exceeds the range of the substrate 101, the retaining wall 104 is arranged on the substrate 101 corresponding to the position of the ink printing boundary, that is, the retaining wall 104 is arranged around the display area AA, and the retaining wall 104 is arranged in the thin film packaging layer 102 in the non-display area NAA.

[0045] Further, with reference to Figure 2 , the display module 100 further comprises a chip on film layer 40, the chip on film layer 40 is arranged on the end surface of the non-display area of the display panel 10; the projection of the second glue layer 302 in the second direction covers part of the chip on film layer 40.

[0046] Chip on Flex (COF), commonly known as Chip on Film (COF), is a die-on-film packaging technology that secures integrated circuits (ICs) to flexible circuit boards. This technology uses a flexible additional circuit board as a chip carrier to combine the chip with the flexible substrate circuit. It also refers to the flexible additional circuit board for unpackaged chips. This technology includes tape-and-reel packaging, flexible board-to-chip assembly, and flexible IC carrier packaging. In this embodiment, COF is used for the COF layer 40. COF utilizes a flexible film as a substrate, making the package structure more compact and thinner. Compared to traditional silicon-based packages, COF packaging can achieve more functions and connections within the same space.

[0047] Specifically, the chip-on-film layer 40 is arranged on the end surface of the non-display area in the display panel 10. By arranging the second adhesive layer 302 to cover part of the chip-on-film layer 40 in the second direction, that is, the second adhesive layer 302 covers part of the chip-on-film layer 40, the chip-on-film layer 40 can be flexibly encapsulated.

[0048] In addition, a connecting portion 50 is provided between the chip-on-film layer 40 and the substrate 101. The connecting portion 50 is used to achieve electrical connection by bonding and binding the chip-on-film layer 40 with the pins on the driving chip in the display panel 10. At the same time, the second adhesive layer 302 and the chip-on-film layer 40 cover the connecting portion 50 to protect the connecting portion 50.

[0049] The utility model provides a display module in which a first adhesive layer and a second adhesive layer are overlapped, thereby extending the water vapor intrusion path. Even if the first adhesive layer and the second adhesive layer shrink due to heat during long-term use, they can still isolate water vapor, effectively preventing water vapor from invading the display panel, thereby improving the reliability of the display panel.

[0050] The embodiment of the present utility model further provides a display device, Figure 4 FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. Figure 4 As shown, the display device 200 includes the display module 100 in any embodiment of the present invention, has all the features of the previous display module 100, and can achieve the same technical effects as the display module 100 in the above embodiments, which will not be repeated here.

[0051] It is noted that the display device 200 can be any device that displays images whether in motion (e.g., video) or stationary (e.g., a still image), whether textual or pictorial. More particularly, it is contemplated that the embodiments can be implemented in or in association with a variety of electronic devices such as, but not limited to, mobile telephones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 players, camcorders, game consoles, wrist watches, clocks, calculators, television monitors, flat panel displays, computer monitors, auto displays (e.g., odometer display, etc.), cockpit controls and / or displays, display of camera views (e.g., in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., display of images on a piece of jewelry) and the like.

[0052] It should be noted that the above-mentioned are only the preferable embodiments of the present application and the technical principles applied. Those skilled in the art should understand that the present application is not limited to the specific embodiments herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A display module, characterized in that: include; A display panel including a display area and a non-display area; The adhesive layer includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is located on one side of the display area, and the second adhesive layer is located on one side of the non-display area; a polarizing layer located between the display area and the first adhesive layer, with a portion of the first adhesive layer extending beyond the polarizing layer in a first direction, and a projection of the first adhesive layer in a second direction covering the polarizing layer and at least a portion of the second adhesive layer; wherein the first direction is the direction from the first adhesive layer to the second adhesive layer, and the second direction is the thickness direction of the display panel.

2. The display module according to claim 1, wherein: The length of the first adhesive layer extending from the polarizing layer in the first direction is at least 130 μm.

3. The display module according to claim 1, wherein: The first adhesive layer is OCA optical adhesive.

4. The display module according to claim 1, wherein: The second adhesive layer is UV adhesive.

5. The display module according to claim 1, wherein: The display panel further includes a thin film encapsulation layer, a touch protection layer and a substrate; The touch protection layer is arranged between the thin film encapsulation layer and the polarizing layer, and the thin film encapsulation layer is located between the touch protection layer and the substrate; the projection of the adhesive layer in the second direction covers the thin film encapsulation layer and the touch protection layer.

6. The display module according to claim 5, wherein: The lengths of the thin film encapsulation layer and the touch protection layer in the first direction are both smaller than the length of the substrate in the first direction.

7. The display module according to claim 5, wherein: The display panel further includes a retaining wall; the retaining wall is located in the thin film encapsulation layer and is arranged around the display area.

8. The display module according to claim 5, wherein: The projections of the polarizing layer and the second adhesive layer in the second direction cover the touch protection layer.

9. The display module according to claim 1, wherein: The display module further includes a chip-on-film layer, which is arranged on an end surface of the non-display area in the display panel; the projection of the second adhesive layer in the second direction covers a portion of the chip-on-film layer.

10. A display device, characterized in that: The display device comprises the display module according to any one of claims 1 to 9.

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