Display Module and Display Device

Patent metadata

Field	Value
Publication number	US-2024244902-A1
Application number	US-202218016679-A
Country	US
Kind code	A1
Filing date	Feb 28, 2022
Priority date	Feb 28, 2022
Publication date	Jul 18, 2024
Grant date	—

Abstract

A display module includes a display substrate and a flexible circuit board bonding-connected with the display substrate, wherein the flexible circuit board is bent to a side of the display substrate away from a display side; the flexible circuit board includes a bent region and non-bent regions located at both sides of the bent region; the bent region includes a bending axis, the flexible circuit board is bent along the bending axis, the bent region is provided with one or more openings at a position of the bending axis, and the openings are through holes penetrating the flexible circuit board or grooves not penetrating the flexible circuit board; the bent region includes at least one wiring layer, the wiring layer of the bent region includes multiple traces extending to the non-bent regions on both sides of the bent region, and the plurality of traces do not overlap with the openings.

First claim

1 . A display module, comprising a display substrate and a flexible circuit board bonding-connected with the display substrate, wherein the flexible circuit board is bent to a side of the display substrate away from a display side;
the flexible circuit board comprises a bent region and non-bent regions located at two sides of the bent region; the bent region comprises a bending axis, the flexible circuit board is bent along the bending axis, the bent region is provided with one or more openings at a position on the bending axis, and the one or more openings are through holes penetrating the flexible circuit board or grooves not penetrating the flexible circuit board; and the bent region comprises at least one wiring layer, the wiring layer of the bent region comprises a plurality of traces extending to the non-bent regions on the two sides of the bent region, and the plurality of traces do not overlap with the one or more openings.

2 . The display module according to claim 1 , wherein a trace comprises a first straight-line segment, an intermediate segment and a second straight-line segment that are sequentially connected with each other, the first straight-line segment and the second straight-line segment are both disposed perpendicular to the bending axis, and the intermediate segment is located at a periphery of an opening;
a straight line perpendicular to the bending axis and passing through a geometric center of the opening is taken as a central axis of the opening, the plurality of traces symmetrically disposed with respect to the central axis of the opening are taken as a group of traces, and the plurality of traces in each group do not overlap.

3 . The display module according to claim 2 , wherein the intermediate segment is a polyline or an arc.

4 . The display module according to claim 2 , wherein a distance between two adjacent groups of traces is greater than a distance between adjacent traces in each group of traces in a direction parallel to the bending axis.

5 . The display module according to claim 1 , wherein a shape of the one or more openings comprises any one or more of a circle, an ellipse, a rectangle, and a hexagon, and the one or more openings are disposed symmetrically with the bending axis as a symmetrical axis.

6 . The display module according to claim 5 , wherein a plurality of openings are provided, the plurality of openings comprise a first groove, a through hole, and a second groove that are sequentially disposed along the direction of the bending axis; and a length of each of the first groove and the second groove in a direction parallel to the bending axis is greater than a width of each of the first groove and the second groove in a direction perpendicular to the bending axis.

7 . The display module according to claim 6 , wherein a depth of the first groove gradually increases from a middle position of the first groove to two ends of the first groove, and a depth of the second groove gradually increases from a middle position of the second groove to two ends of the second groove in the direction parallel to the bending axis.

8 . The display module according to claim 5 , wherein a plurality of openings are provided, the plurality of openings comprise a plurality of grooves sequentially disposed along the direction of the bending axis, and in the direction parallel to the bending axis, a depth of a groove near an edge position of the bent region is greater than a depth of the groove near a middle position of the bent region.

9 . The display module according to claim 6 , wherein a distance between the first groove and the through hole is smaller than a length of the first groove in the direction parallel to the bending axis, and a distance between the second groove and the through hole is smaller than a length of the second groove in the direction parallel to the bending axis.

10 . The display module according to claim 6 , wherein the through hole is circular in shape, a diameter of the through hole is larger than the width of each of the first groove and the second groove in the direction perpendicular to the bending axis and smaller than the length of each of the first groove and the second groove in the direction parallel to the bending axis; or, the through hole is elliptical in shape, and both a major axis and a minor axis of the through hole are larger than the width of each of the first groove and the second groove in the direction perpendicular to the bending axis and smaller than the length of each of the first groove and the second groove in the direction parallel to the bending axis.

11 . The display module according to claim 1 , wherein a notch is provided at a position where an edge of the bent region intersects the bending axis, the notch is symmetrically disposed with respect to the bending axis, and a shape of the notch comprises any one or more of a rectangle, a semicircle, and a trapezoid.

12 . The display module according to claim 11 , wherein the notch has a rectangular shape and a width of the notch in the direction parallel to the bending axis is smaller than a length of the notch in the direction perpendicular to the bending axis.

13 . The display module according to claim 11 , wherein a distance between the notch and the traces is smaller than a width of the notch in the direction parallel to the bending axis.

14 . The display module according to claim 1 , wherein the plurality of traces comprise at least one straight line disposed perpendicular to the bending axis.

15 . A display device, comprising the display module according to claim 1 .

Assignees

• Yunnan Invensight Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wei Junbo
• Yang Shengji
• Lu Pengcheng
• Huang Kuanta
• Tian Yuanlan

Classifications

• H05K1/028

  Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence) · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H05K2201/10128

  Display · CPC title