Display module including a composite heat dissipation layer with crack relief openings and display device

1 . A display module, comprising a display panel and a composite layer, wherein:

the composite layer is located on a backlight side of the display panel;

the composite layer at least includes a heat dissipation layer;

the display panel includes a planar region, a plurality of curved regions and a plurality of corner regions;

the plurality of curved regions is at least partially arranged around the planar region;

the plurality of corner regions is disposed at corners of the plurality of curved regions around the planar region;

in one corner region of the plurality of corner regions, the heat dissipation layer includes at least one opening, and the at least one opening extends along a first direction;

the corner region includes a first position and a second position located at a side of the first position away from the planar region;

a width of the at least one opening in a second direction at the first position is smaller than a width of the at least one opening at the second position in the second direction, wherein the second direction is perpendicular to the first direction;

a length of the at least one opening in the first direction is H;

at 1/2H, the width of the at least one opening in the second directions is D2, and the maximum width of the at least one opening in the second direction is D1;

wherein D2<0.5D1;

in the corner region, the heat dissipation layer includes a first edge and a second edge forming the at least one opening;

at an intersection of the first edge and the second edge, the heat dissipation layer in the corner region includes a crack relief opening; and

along the first direction, a width of the crack relief opening in the second direction gradually increases and the width of the crack relief opening in the second direction is larger when being closer to the planar region; or the crack relief opening includes a crack relief edge and the curvature of the crack relief edge gradually increases in the first direction, wherein the curvature of the crack relief edge is larger when being closer to the planar region.

2 . The display module according to claim 1 , wherein:

one corner region of the plurality corner regions includes a plurality of openings;

the plurality of openings at least includes a first-level opening and a second-level opening;

a length H1 of the first-level opening in an extending direction of the first-level opening is different from a length H2 of the second-level opening in an extending direction of the second-level opening; and/or

a maximum value D11 of the width of the first-level opening in a third direction is different from a maximum value D12 of the second-level opening in a fourth direction, wherein the third direction is perpendicular to the extending direction of the first-level opening and the fourth direction is perpendicular to the extending direction of the second-level opening.

3 . The display module according to claim 2 , wherein:

the corner region includes one first-level opening and at least two second-level openings, and the first-level opening is located between the at least two second-level openings along the second direction.

4 . The display module according to claim 2 , wherein H1>H2.

5 . The display module according to claim 2 , wherein D11>D12.

6 . The display module according to claim 2 , wherein H1>H2 and D11>D12.

7 . The display module according to claim 2 , wherein:

at 1/2H1, the width of the first-level opening in the third direction is D21;

at 1/2H2, the width of the second-level opening in the fourth direction is D22; and

D21<D22.

8 . The display module according to claim 2 , wherein:

in the corner region, the heat dissipation layer includes a third edge and a fourth edge forming the first-level opening;

along the extension direction of the first-level opening, the third edge and the fourth edge meet at a first apex;

in the corner region, the heat dissipation layer includes a fifth edge and a sixth edge forming the second-level opening;

along the extension direction of the second-level opening, the fifth edge and the sixth edge intersect at a second vertex; and

the first vertex and the second vertex are located at different positions of the corner region.

9 . The display module according to claim 8 , wherein:

the third edge and the fourth edge are symmetrical to each other along a first symmetric axis;

the fifth edge and the sixth edge are symmetrical to each other along a second symmetric axis; and

the first symmetric axis and the second symmetric axis do not intersect.

10 . The display module according to claim 1 , wherein:

in one corner region of the plurality of corner regions, the heat dissipation layer further includes a hollow part; and

along the first direction, the hollow part is located at a side of the opening close to the planar region.

11 . The display module according to claim 10 , wherein:

in the corner region, the heat dissipation layer includes a first sub-edge forming the opening;

the hollow part includes a second sub-edge facing the opening; and

a shape of the second sub-edge is the same as a shape of the first sub-edge.

12 . The display module according to claim 11 , wherein:

the hollow part includes a third sub-edge and a fourth sub-edge respectively connected to two ends of the second sub-edge, and the third sub-edge and the fourth sub-edge include any one of a straight line or a curve.

13 . The display module according to claim 1 , wherein:

the composite layer further includes a first foam layer on a side of the heat dissipation layer facing the display panel; and

the first foam layer has a whole-surface structure covering the planar region, the plurality of curved regions, and the plurality of corner regions.

14 . The display module according to claim 13 , wherein:

the composite layer further includes a first adhesive layer and a second adhesive layer;

the first adhesive layer is located between the display panel and the first foam layer;

the second adhesive layer is located between the heat dissipation layer and the first foam layer; and

both the first adhesive layer and the second adhesive layer have whole-surface structures covering the planar region, the plurality of curved regions, and the plurality of corner regions.

15 . The display module according to claim 1 , wherein:

the plurality of corner regions at least include a first corner region and a second corner region;

one opening in the first corner region is a first opening, and one opening in the second corner region is a second opening;

a length H01 of the first opening in an extending direction of the first opening is different from a length H02 of the second opening in an extending direction of the second opening; and/or,

a maximum value D01 of a width of the first opening in a fifth direction is different from a maximum value D02 of a width of the second opening in a sixth direction, wherein the fifth direction is perpendicular to the extending direction of the first opening and the sixth direction is perpendicular to the extending direction of the second opening.

16 . The display module according to claim 15 , wherein H01>H02.

17 . The display module according to claim 15 , wherein D01>D02.

18 . The display module according to claim 15 , wherein H01>H02 and D01>D02.

19 . A display device, comprising a display module including a display panel and a composite layer, wherein:

the composite layer is located on a backlight side of the display panel;

the composite layer at least includes a heat dissipation layer;

the display panel includes a planar region, a plurality of curved regions and a plurality of corner regions;

the plurality of curved regions is at least partially arranged around the planar region;

the plurality of corner regions is disposed at corners of the plurality of curved regions around the planar region;

in one corner region of the plurality of corner regions, the heat dissipation layer includes at least one opening, and the at least one opening extends along a first direction;

the corner region includes a first position and a second position located at a side of the first position away from the planar region;

a width of the at least one opening in a second direction at the first position is smaller than a width of the at least one opening at the second position in the second direction, wherein the second direction is perpendicular to the first direction;

a length of the at least one opening in the first direction is H;

at 1/2H, the width of the at least one opening in the second directions is D2, and the maximum width of the at least one opening in the second direction is D1;

wherein D2<0.5D1;

in the corner region, the heat dissipation layer includes a first edge and a second edge forming the at least one opening;

at an intersection of the first edge and the second edge, the heat dissipation layer in the corner region includes a crack relief opening; and

along the first direction, a width of the crack relief opening in the second direction gradually increases and the width of the crack relief opening in the second direction is larger when being closer to the planar region; or the crack relief opening includes a crack relief edge and the curvature of the crack relief edge gradually increases in the first direction, wherein the curvature of the crack relief edge is larger when being closer to the planar region.