Display module and display apparatus
A display module includes a flexible display panel, a base layer and a sound wave driving structure. The panel includes at least one bending area and at least two non-bending areas. The base layer is on a non-display side of the panel. The sound wave driving structure is between the panel and the base layer, and includes a first electrode layer and a second electrode layer, the first electrode layer is closer to the panel than the second electrode layer, and the first electrode layer and the second electrode layer have a gap therebetween. An orthographic projection of at least one of the first electrode layer and the second electrode layer on the panel is non-overlapping with the bending area; and/or the sound wave driving structure further includes an insulating spacing layer, and an orthographic projection of the insulating spacing layer on the panel is in the bending area.
1 . A display module, comprising:
a flexible display panel, including at least one bending area and at least two non-bending areas, and two adjacent non-bending areas being connected by a bending area;
a base layer, provided on a non-display side of the flexible display panel; and
a sound wave driving structure, provided between the flexible display panel and the base layer, and including a first electrode layer and a second electrode layer, the first electrode layer being closer to the flexible display panel than the second electrode layer, and the first electrode layer and the second electrode layer having a gap therebetween;
wherein an orthographic projection of at least one of the first electrode layer and the second electrode layer on the flexible display panel is non-overlapping with the bending area; and/or the sound wave driving structure further includes an insulating spacing layer, and an orthographic projection of the insulating spacing layer on the flexible display panel is located in the bending area;
wherein the sound wave driving structure further includes:
a mold frame, arranged around a peripheral of the first electrode layer and the second electrode layer, and forming a vibration cavity with the flexible display panel and the base layer;
wherein in a case where the sound wave driving structure includes the insulating spacing layer, the insulating spacing layer is made of a same material as the mold frame and arranged in a same layer as the mold frame; and the insulating spacing layer separates the vibration cavity to form at least two sub-cavities.
2 . The display module according to claim 1 , wherein the first electrode layer includes at least two first electrodes, each first electrode is located in a non-bending area; and/or the second electrode layer includes at least two second electrodes, and each second electrode is located in a non-bending area.
3 . The display module according to claim 2 , wherein in a case where the first electrode layer includes the at least two first electrodes, the sound wave driving structure further includes a first connection line, and the first connection line is provided on the flexible display panel and electrically connected to the at least two first electrodes;
in a case where the second electrode layer includes the at least two second electrodes, the sound wave driving structure further includes a second connection line, the second connection line is provided on the base layer and electrically connected to the at least two second electrodes.
4 . The display module according to claim 2 , wherein in a case where the first electrode layer includes the at least two first electrodes, the sound wave driving structure further includes two first connection lines, the two first connection lines are respectively provided on both sides of the first electrode layer in a first direction, the first connection lines extend along a second direction and electrically connected to edges of the at least two first electrodes extending along the second direction; and the second direction is a direction in which the two adjacent non-bending areas are arranged, and the first direction is perpendicular to the second direction;
in a case where the second electrode layer includes the at least two second electrodes, the sound wave driving structure further includes two second connection lines, and the two second connection lines are respectively provided on both sides of the second electrode layer in the first direction, the second connection lines extend along the second direction and electrically connected to edges of the at least two second electrodes extending along the second direction.
5 . The display module according to claim 2 , wherein the sound wave driving structure further includes:
a first bonding electrode, provided on the flexible display panel, provided on a side of the first electrode layer in a second direction, and electrically connected to the first electrode layer; the second direction being a direction in which the two adjacent non-bending areas are arranged; and
a second bonding electrode and a third bonding electrode, provided on the base layer and provided on a side of the second electrode layer in the second direction, wherein the second bonding electrode is electrically connected to the second electrode layer, and the third bonding electrode is electrically connected to the first bonding electrode.
6 . The display module according to claim 5 , wherein the sound wave driving structure further includes a first connection line, the first bonding electrode is electrically connected to the first electrode layer through the first connection line; and/or
the sound wave driving structure further includes a second connection line, the second bonding electrode is electrically connected to the second electrode layer through the second connection line.
7 . The display module according to claim 5 , wherein the sound wave driving structure further includes two second connection lines, the sound wave driving structure includes two second bonding electrodes, and the two second bonding electrodes are respectively provided on both sides of the third bonding electrode in a first direction, and electrically connected to the two second connection lines respectively; and the first direction is perpendicular to the second direction.
8 . The display module according to claim 1 , wherein the sound wave driving structure further includes the insulating spacing layer;
in a case where an orthographic projection of each of the first electrode layer and the second electrode layer on the flexible display panel covers the bending area, a surface of the insulating spacing layer proximate to the flexible display panel is in contact with the first electrode layer, and a surface of the insulating spacing layer proximate to the base layer is in contact with the second electrode layer;
in a case where the orthographic projection of each of the first electrode layer and the second electrode layer on the flexible display panel is non-overlapping with the bending area, the surface of the insulating spacing layer proximate to the flexible display panel is flush with a surface of the first electrode layer proximate to the flexible display panel, and the surface of the insulating spacing layer proximate to the base layer is flush with a surface of the second electrode layer proximate to the flexible display panel;
in a case where an orthographic projection of the first electrode layer on the flexible display panel is non-overlapping with the bending area, and an orthographic projection of the second electrode layer on the flexible display panel covers the bending area, the surface of the insulating spacing layer proximate to the flexible display panel is flush with the surface of the first electrode layer proximate to the flexible display panel, and the surface of the insulating spacing layer proximate to the base layer is in contact with the second electrode layer;
in a case where the orthographic projection of the second electrode layer on the flexible display panel is non-overlapping with the bending area, and the orthographic projection of the first electrode layer on the flexible display panel covers the bending area, the surface of the insulating spacing layer proximate to the flexible display panel is in contact with the first electrode layer, and the surface of the insulating spacing layer proximate to the base layer is flush with the surface of the second electrode layer proximate to the flexible display panel.
9 . The display module according to claim 1 , wherein a surface of the mold frame proximate to the flexible display panel is flush with a surface of the insulating spacing layer proximate to the flexible display panel, and a surface of the mold frame proximate to the base layer is flush with a surface of the insulating spacing layer proximate to the base layer.
10 . The display module according to claim 9 , wherein
in a case where a surface of the insulating spacing layer proximate to the flexible display panel is flush with a surface of the first electrode layer proximate to the flexible display panel, the mold frame is arranged around outside of the first electrode layer;
in a case where the surface of the insulating spacing layer proximate to the flexible display panel is in contact with the first electrode layer, an orthographic projection of the mold frame on the flexible display panel is located within a range of an orthographic projection of the first electrode layer on the flexible display panel, and the surface of the mold frame proximate to the flexible display panel is in contact with the first electrode layer;
in a case where a surface of the insulating spacing layer proximate to the base layer is flush with a surface of the second electrode layer proximate to the base layer, the mold frame is arranged around outside of the second electrode layer;
in a case where the surface of the insulating spacing layer proximate to the base layer is in contact with the second electrode layer, the orthographic projection of the mold frame on the flexible display panel is located within a range of an orthographic projection of the second electrode layer on the flexible display panel, and the surface of the mold frame proximate to the base layer is in contact with the second electrode layer.
11 . The display module according to claim 1 , wherein the mold frame includes a plurality of mold strips, and two adjacent mold strips have a first gap therebetween to enable the vibration cavity to communicate with outside environment.
12 . The display module according to claim 11 , wherein at a corner of the non-bending area away from the bending area, the two adjacent mold strips have the first gap therebetween; and
one of the two adjacent mold strips includes a body portion and a first protruding portion; the body portion extends along the peripheral of the first electrode layer and the second electrode layer; one end of the first protruding portion is connected to the body portion, and an other end extends into the vibration cavity; and the first protruding portion is arranged opposite to the first gap.
13 . The display module according to claim 12 , wherein another of the two adjacent mold strips extends along the peripheral of the first electrode layer and the second electrode layer, and an extending direction of at least a part of the first protruding portion is parallel to an extending direction of the other mold strip.
14 . The display module according to claim 1 , wherein the sound wave driving structure includes the insulating spacing layer, wherein
the insulating spacing layer includes an opening penetrating through the insulating spacing layer along a second direction, and the opening communicates the at least two sub-cavities on both sides of the insulating spacing layer; and the second direction is a direction in which the two adjacent non-bending areas are arranged.
15 . The display module according to claim 14 , wherein the insulating spacing layer includes a plurality of openings, and the plurality of openings cut off the insulating spacing layer to form a plurality of insulating blocks spaced apart along a first direction; and the first direction is perpendicular to the second direction.
16 . The display module according to claim 14 , wherein an orthographic projection of the mold frame on the flexible display panel is non-overlapping with the bending area, and the insulating spacing layer and the mold frame have a second gap therebetween; and
the insulating spacing layer further includes a second protruding portion, and the second protruding portion is arranged opposite to the second gap.
17 . The display module according to claim 1 , wherein the base layer includes a buffer layer and a support layer stacked in a direction perpendicular to the flexible display panel and away from the flexible display panel;
the display module further comprises:
a back film, provided between the sound wave driving structure and the flexible display panel, the first electrode layer being provided on a surface of the back film, and the second electrode layer being provided on a surface of the buffer layer; or the back film being provided between the sound wave driving structure and the base layer, the first electrode layer being provided on the non-display side of the flexible display panel, and the second electrode layer being provided on the surface of the back film.
18 . The display module according to claim 1 , wherein the sound wave driving structure further includes:
a plurality of support columns, provided between the first electrode layer and the second electrode layer, and an orthographic projection of the plurality of support columns on the flexible display panel is non-overlapping with the bending area.
19 . A display apparatus, comprising the display module according to claim 1 .