Display module and display device

Abstract

The application discloses a display module and a display device. By setting a part of the polarizing plate in the corner area, and the convex part extending towards the edge of the display panel in the corner area, in the top view of the display module, a part of the convex part overlaps the crack detection trace in the corner area, that is, the display module of the application expands the polarizing plate on the display panel, so that the polarizing plate can completely cover the part of the crack detection trace in the corner area. When the cold and hot impact test is performed on the display module, the shrinkage of the polarizing plate can avoid the protection failure of the polarizing plate on the part of the crack detection trace in the corner area, and the crack detection trace is prevented from being broken, so that the detection failure of the crack detection trace of the display module is avoided.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and display device. Background Technology

[0002] Organic light-emitting diode (OLED) displays are prone to cracking at their edges. To detect cracks, crack detection traces are installed along the edges of the OLED panel. When the edge of the panel is damaged, the crack detection traces break, causing display abnormalities. The OLED panel includes a bottom bezel, side bezels, and corner areas between them. During thermal shock testing, the corner sections of the crack detection traces in conventional OLED displays are prone to breakage, leading to detection failure. Summary of the Invention

[0003] Embodiments of this application provide a display module and display device to improve the problem of detection failure caused by broken detection traces in display panels.

[0004] In a first aspect, embodiments of this application provide a display module, including a display area and a non-display area, wherein the non-display area includes a bottom border area, a side border area, and a corner area located between the bottom border area and the side border area, and the display module includes:

[0005] Display panel, a portion of which is located within the corner area;

[0006] A crack detection trace is provided on the display panel, and a portion of the crack detection trace is located within the corner area;

[0007] A polarizer is disposed on the light-emitting side of the display panel, a portion of the polarizer is located in the corner area, and the polarizer located in the corner area has a protruding portion facing the edge of the display panel located in the corner area;

[0008] In the top view of the display module, a portion of the protruding part overlaps with the crack detection trace located in the corner area.

[0009] Furthermore, the protruding portion does not exceed the edge of the display panel located within the corner area.

[0010] Furthermore, the distance from the edge of the protruding portion to the crack detection trace located in the corner area is 50um to 100um.

[0011] Furthermore, the display module also includes an adhesive layer and a cover plate. The adhesive layer is disposed on the surface of the polarizer away from the display panel, and the cover plate is disposed on the surface of the adhesive layer away from the display panel. A portion of the adhesive layer is located in the corner area.

[0012] In the top view of the display module, a portion of the adhesive layer located in the corner area overlaps with the crack detection trace located in the corner area, and the adhesive layer located in the corner area does not exceed the edge of the protruding portion.

[0013] Furthermore, the display panel includes a flat portion, a bent portion, and a bonding portion. The bent portion is located between the flat portion and the bonding portion. The protruding portion does not exceed the edge of the bent portion, and the polarizer located on the flat portion does not exceed the edge of the bent portion.

[0014] Furthermore, a portion of the polarizer is located on the flat plate portion, and the edge of the polarizer located on the flat plate portion and near the bent portion is straight, while the edge of the protruding portion is curved.

[0015] Furthermore, a recess is provided between the edge of the polarizer located on the flat plate portion and near the side of the bent portion and the edge of the protruding portion.

[0016] Furthermore, the edges of the recess are arc-shaped.

[0017] Furthermore, along the path from the side bezel area to the bottom bezel area, the distance from the edge of the protruding portion to the edge of the display panel located in the corner area first increases and then decreases.

[0018] Secondly, embodiments of this application provide a display device, which includes the aforementioned display module.

[0019] The beneficial effects of this application are:

[0020] This application provides a display module in which a portion of the polarizer is located within a corner area, and the polarizer within the corner area has a protruding portion facing the edge of the display panel within the corner area. In a top view of the display module, a portion of the protruding portion overlaps with the crack detection trace within the corner area. That is, the display module of this application extends the polarizer on the display panel outward, so that the polarizer can completely cover the portion of the crack detection trace located within the corner area. When the display module is subjected to thermal shock testing, it can avoid the polarizer shrinking and failing to protect the portion of the crack detection trace located in the corner area, thus preventing the crack detection trace from breaking and causing the crack detection trace of the display module to fail to detect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the positions of the polarizer and crack detection traces in a conventional display device.

[0022] Figure 2 This is a schematic diagram of the display device of this application;

[0023] Figure 3 yes Figure 2 An enlarged view of position C of the display device shown;

[0024] Figure 4 yes Figure 3 The cross-sectional view of the display device at DD′ shown;

[0025] Figure 5 yes Figure 3 The cross-sectional view of the display device at EE′ is shown.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-Support layer; 200-Display panel; 210-Flat panel; 220-Bending part; 230-Binding part; 300-Crack detection trace; 400-Polarizing film; 410-Protruding part; 420-Recessed part; 500-Adhesive layer; 600-Cover plate.

[0028] 01-Display panel; 02-Polarizer; 03-Crack detection trace. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0030] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0031] Embodiments of this application provide a display device, with reference to... Figures 2-4 The display device includes a display module, which includes a display area AA and a non-display area BB. The non-display area BB includes a bottom border area BB1, a side border area BB2, and a corner area BB3 located between the bottom border area BB1 and the side border area BB2. The display module includes a display panel 200, a crack detection trace 300, and a polarizer 400.

[0032] Specifically, a portion of the display panel 200 is located within the corner area BB3; the crack detection trace 300 is disposed on the display panel 200, and a portion of the crack detection trace 300 is located within the corner area BB3; the polarizer 400 is disposed on the light-emitting side of the display panel 200, a portion of the polarizer 400 is located within the corner area BB3, and the polarizer 400 located within the corner area BB3 has a protruding portion 410 facing the edge of the display panel 200 located within the corner area BB3; wherein, in the top view of the display module, a portion of the protruding portion 410 overlaps with the crack detection trace 300 located within the corner area BB3.

[0033] When bending the portion of the display panel 01 of the display device located in the lower bezel area, in order to reduce the stress on the polarizer 02 of the display device, refer to Figure 1In conventional display devices, the polarizer 02 needs to be recessed relative to the display panel 01 at the corner between the bottom bezel and side bezel areas. Furthermore, during the production of the polarizer 02, the cutting process involves first cutting and then grinding the edges. The polarizer 02 attached to the display panel 01 is a regular square shape, meaning its edges are right angles. However, the corner edges of the display panel 01 are curved. Therefore, the polarizer 02 attached to the display panel 01 cannot completely cover the crack detection trace 03 located at the corner between the bottom bezel and side bezel areas. During thermal shock testing of the display device, the polarizer 02 also shrinks, making it even more difficult for it to cover the corner portion of the crack detection trace 03 on the display panel 01. This causes the corner portion of the crack detection trace 03 on the display panel 01 to easily break, resulting in detection failure. Therefore, the technical solution of this application sets a portion of the polarizer 400 within the corner area BB3, and the polarizer 400 within the corner area BB3 has a protruding portion 410 facing the edge of the display panel 200 within the corner area BB3. In the top view of the display module, a portion of the protruding portion 410 overlaps with the crack detection trace 300 within the corner area BB3. That is, the display module of this application extends the polarizer 400 on the display panel 200 outward, so that the polarizer 400 can completely cover the portion of the crack detection trace 300 within the corner area BB3. When the display module is subjected to thermal shock testing, even if the ambient temperature changes... The polarizer 400 still has sufficient coverage over the portion of the crack detection trace 300 located within the corner area BB3. Due to changes in ambient temperature, the polarizer 400 will not shrink, exposing the portion of the crack detection trace 300 within the corner area BB3. This prevents the polarizer 400 from failing to protect the portion of the crack detection trace 300 within the corner area BB3 due to shrinkage, thus avoiding breakage of the crack detection trace 300. When the display module is subjected to external impact or bending, causing a crack, the crack will cut the crack detection trace 300, resulting in a circuit break or a change in resistance. This allows the crack area to be determined based on the crack detection trace 300, preventing the crack detection trace 300 from failing to detect the crack in the display module.

[0034] In this embodiment, reference Figure 4The protruding portion 410 does not exceed the edge of the display panel 200 located within the corner area BB3. Since the polarizer 400 needs to be cut after being attached to the display panel 200, by setting the protruding portion 410 to not exceed the edge of the display panel 200 located within the corner area BB3, excessive cutting of the polarizer 400 is avoided, preventing waste and thus avoiding increased production costs for the display device.

[0035] In this embodiment, the distance from the edge of the protruding portion 410 to the crack detection trace 300 located in the corner area BB3 is 50µm to 100µm. By setting the distance from the edge of the protruding portion 410 to the crack detection trace 300 located in the corner area BB3 to 50µm to 100µm, on the one hand, it avoids the polarizer 400 from not completely covering the crack detection trace 300 in the corner area BB3 due to an excessively large distance, which would cause the polarizer 400 to fail to protect the crack detection trace. On the other hand, it avoids the polarizer 400 from being cut too much due to an excessively small distance, which would result in waste of the polarizer 400 and increase the production cost of the display device. Preferably, the distance from the edge of the protruding portion 410 to the crack detection trace 300 located in the corner area BB3 is 50um, 55um, 60um, 65um, 70um, 75um, 80um, 85um, 90um, 95um or 100um.

[0036] In this embodiment, reference Figure 4 The display module further includes an adhesive layer 500 and a cover plate 600. The adhesive layer 500 is disposed on a surface of the polarizer 400 away from the display panel 200, and the cover plate 600 is disposed on a surface of the adhesive layer 500 away from the display panel 200. A portion of the adhesive layer 500 is located within the corner area BB3. In a top view of the display module, a portion of the adhesive layer 500 located within the corner area BB3 overlaps with the crack detection trace 300 located within the corner area BB3, and the adhesive layer 500 located within the corner area BB3 does not exceed the edge of the protruding portion 410.

[0037] In this embodiment, reference Figure 3 , Figure 5The display panel 200 includes a flat portion 210, a bent portion 220, and a bonding portion 230. The bent portion 220 is located between the flat portion 210 and the bonding portion 230, wherein the protruding portion 410 does not extend beyond the edge of the bent portion 220. By setting the protruding portion 410 to not extend beyond the edge of the bent portion 220, that is, the polarizer 400 located in the corner area BB3 does not overlap with the bent portion 220, thereby preventing the portion of the display panel 200 located in the lower frame area BB1 used to form the bent portion 220 from overlapping with the polarizer 400 located in the corner area BB3, thus avoiding the polarizer 400 near the lower frame area BB1 from detaching when the display panel 200 is bent.

[0038] In this embodiment, reference Figure 5 The polarizer 400 located on the flat plate portion 210 does not extend beyond the edge of the bent portion 220.

[0039] In this embodiment, reference Figure 3 and Figure 4 A portion of the polarizer 400 is located on the flat plate portion 210. The edge of the polarizer 400 located on the flat plate portion 210 and near the bending portion 220 is straight, while the edge of the protruding portion 410 is curved. By setting the edge of the polarizer 400 located on the flat plate portion 210 and near the bending portion 220 to be straight and the edge of the protruding portion 410 to be curved, the shape of the portion of the polarizer 400 located in the corner area BB3 is adapted to the shape of the portion of the display panel 200 located in the corner area BB3. Compared with conventional solutions, this avoids the problem that the edge of the polarizer 400 near the bending portion 220 is a straight line, which makes it difficult for the polarizer 400 to completely cover the crack detection trace 300.

[0040] In this embodiment, reference Figure 3 The edge of the portion of the display panel 200 located in the corner area BB3 is curved.

[0041] In this embodiment, reference Figure 3A recessed portion 420 is provided between the edge of the polarizer 400 located on the flat plate portion 210 and on the side near the bent portion 220 and the edge of the protruding portion 410. By providing a recessed portion 420 between the edge of the polarizer 400 located on the flat plate portion 210 and near the edge of the bending portion 220 and the edge of the protruding portion 410, the distance from the connection area between the edge of the polarizer 400 and the edge of the protruding portion 410 on the flat plate portion 210 and near the bending portion 220 to the bending portion 220 can be increased. During the production of the display device, on the one hand, the polarizer 400 near the lower frame area BB1 can be prevented from falling off when the display panel 200 is bent. On the other hand, a transition area can be formed between the portion of the polarizer 400 located in the corner area BB3 and near the edge of the bending portion 220 and the portion of the polarizer 400 located on the flat plate portion 210 and near the edge of the bending portion 220, which is more conducive to cutting the polarizer 400.

[0042] In this embodiment, reference Figure 3 The edge of the recessed portion 420 is arc-shaped.

[0043] In this embodiment, along the path from the side bezel area BB2 to the bottom bezel area BB1, the distance from the edge of the protruding portion 410 to the edge of the display panel 200 located in the corner area BB3 first increases and then decreases. Since the display panel in the bottom bezel area of ​​the display module needs to be bent, the polarizer near the bent portion of the display panel is more prone to warping or delamination, and crack detection traces are more likely to be exposed. Therefore, by setting the distance from the edge of the protruding portion 410 to the edge of the display panel 200 located in the corner area BB3 along the path from the side bezel area BB2 to the bottom bezel area BB1 to first increase and then decrease, the area of ​​the protruding portion of the polarizer near the bent portion of the display panel is made larger, reducing the risk of warping or delamination of the polarizer near the bent portion of the display panel, thus reducing the risk of crack detection traces being exposed, and further reducing the risk of crack detection traces in the corner area of ​​the display panel being prone to breakage.

[0044] In this embodiment, the display module further includes a support layer 100, a portion of which is located in the corner area BB3, and the display panel 200 is disposed on the support layer 100.

[0045] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A display module, characterized in that, The display module includes a display area and a non-display area. The non-display area includes a bottom border area, a side border area, and a corner area located between the bottom border area and the side border area. Display panel, a portion of which is located within the corner area; A crack detection trace is provided on the display panel, and a portion of the crack detection trace is located within the corner area; A polarizer is disposed on the light-emitting side of the display panel, a portion of the polarizer is located in the corner area, and the polarizer located in the corner area has a protruding portion facing the edge of the display panel located in the corner area; In the top view of the display module, the protruding portion overlaps with the crack detection trace located in the corner area.

2. The display module according to claim 1, characterized in that, The protruding portion does not exceed the edge of the display panel located within the corner area.

3. The display module according to claim 2, characterized in that, The distance from the edge of the protruding portion to the crack detection trace located in the corner area is 50µm to 100µm.

4. The display module according to claim 1, characterized in that, The display module further includes an adhesive layer and a cover plate. The adhesive layer is disposed on the surface of the polarizer away from the display panel, and the cover plate is disposed on the surface of the adhesive layer away from the display panel. A portion of the adhesive layer is located in the corner area. In the top view of the display module, a portion of the adhesive layer located in the corner area overlaps with the crack detection trace located in the corner area, and the adhesive layer located in the corner area does not exceed the edge of the protruding portion.

5. The display module according to any one of claims 1-4, characterized in that, The display panel includes a flat section, a bent section, and a bonding section. The bent section is located between the flat section and the bonding section. The protruding portion does not exceed the edge of the bent section, and the polarizer on the flat section does not exceed the edge of the bent section.

6. The display module according to claim 5, characterized in that, A portion of the polarizer is located on the flat plate portion, and the edge of the polarizer located on the flat plate portion and near the bent portion is straight, while the edge of the protruding portion is curved.

7. The display module according to claim 6, characterized in that, A recess is provided between the edge of the polarizer located on the flat plate portion and on the side near the bend portion and the edge of the protruding portion.

8. The display module according to claim 7, characterized in that, The edge of the recess is arc-shaped.

9. The display module according to claim 1, characterized in that, Along the path from the side bezel area to the bottom bezel area, the distance from the edge of the protruding portion to the edge of the display panel located in the corner area first increases and then decreases.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1-9.

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