Display module and display device

Patent metadata

Field	Value
Publication number	US-12510933-B2
Application number	US-202218276259-A
Country	US
Kind code	B2
Filing date	Aug 16, 2022
Priority date	Aug 16, 2022
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Provided is a display module. The display module includes: a display panel, a first printed circuit board, and a flexible printed circuit board; wherein the display panel is electrically connected to the first printed circuit board, the first printed circuit board is disposed at a back of the display panel, and the flexible printed circuit board includes a first connecting portion, a second connecting portion, and a flexible connecting structure, wherein the flexible connecting structure includes a plurality of stacked connecting bands, two ends of the flexible connecting structure are connected to the first connecting portion and the second connecting portion respectively, the first connecting portion is connected to the first printed circuit board, and the second connecting portion is configured to be connected to the host.

First claim

What is claimed is:

1 . A display module, configured to be rotatably connected to a host, the display module comprising: a display panel, a first printed circuit board, and a flexible printed circuit board;
wherein the display panel is electrically connected to the first printed circuit board, the first printed circuit board is disposed at a back of the display panel, and the flexible printed circuit board comprises a first connecting portion, a second connecting portion, and a flexible connecting structure, wherein the flexible connecting structure comprises a plurality of stacked connecting bands, two ends of the flexible connecting structure are connected to the first connecting portion and the second connecting portion respectively, the first connecting portion is connected to the first printed circuit board, and the second connecting portion is configured to be connected to the host; and each of the connecting bands has a first side face and a second side face, a thinning groove is disposed in the first side face of at least one of the connecting band, and the first side face of the connecting bands is opposite to the second side face of an adjacent connecting band in a stacking direction.

2 . The display module according to claim 1 , wherein a ratio of a length of the thinning groove to a length of the connecting band ranges from 0.6 to 0.9.

3 . The display module according to claim 1 , wherein a width of the thinning groove is equal to a width of the connecting band.

4 . The display module according to claim 1 , wherein a ratio of a depth of the thinning groove to a thickness of the connecting band ranges from 0.3 to 0.7.

5 . The display module according to claim 1 , wherein in response to the flexible printed circuit board being in an unfolded state, the connecting bands are spaced apart in parallel, and each of the connecting bands has a same shape and area.

6 . The display module according to claim 5 , wherein the flexible connecting structure is linear, and the flexible connecting structure runs through a line connecting a geometric center of the first connecting portion to a geometric center of the second connecting portion.

7 . The display module according to claim 5 , wherein the flexible connecting structure is in a fan ring shape, and a middle region of the flexible connecting structure is outside a line connecting a geometric center of the first connecting portion to a geometric center of the second connecting portion.

8 . The display module according to claim 1 , wherein
the first connecting portion and the second connecting portion are formed by folding connecting side plates; in response to the flexible printed circuit board being in an unfolded state, a length direction of the connecting side plate is perpendicular to an arrangement direction of the first connecting portion and the second connecting portion, and the connecting side plate has a plurality of folding regions sequentially connected in the length direction, the plurality of folding regions are in one-to-one correspondence to the plurality of connecting bands, and each of the folding regions is connected to a corresponding connecting band thereof; and the plurality of folded regions are stacked in response to the flexible printed circuit board being in a folded state.

9 . The display module according to claim 8 , wherein a ratio of a width of the connecting band to a width of the folded region to which the connecting band is connected ranges from 0.3 to 0.7.

10 . The display module according to claim 8 , wherein
each of the first connecting portion and the second connecting portion further comprises a connecting structure, wherein the connecting structure and the connecting band are disposed on opposite sides of the connecting side plate respectively; and the display module further comprises a connector disposed on the connecting structure of the second connecting portion, wherein the connector is configured to be connected to a second printed circuit board within the host.

11 . The display module according to claim 10 , wherein the connecting structure comprises a connecting plate and two clamping plates spaced apart in parallel, wherein the connecting plate is disposed between the two clamping plates and two sides of the connecting plate are connected to the two clamping plates respectively, the connector is disposed between the two the clamping plates and is connected to one of the two clamping plates, and the second printed circuit board is disposed between the two clamping plates.

12 . The display module according to claim 11 , wherein
the flexible printed circuit board comprises a first conductive layer, an insulative layer, and a second conductive layer that are stacked sequentially in a thickness direction; and at least part of a region of the connecting structure of the first conductive layer or the second conductive layer is in a mesh shape.

13 . The display module according to claim 1 , wherein the flexible printed circuit board further comprises a protective layer, wrapped around the plurality of connecting bands.

14 . The display module according to claim 1 , wherein the first printed circuit board and the flexible printed circuit board are integrally formed.

15 . The display module according to claim 14 , wherein the first connecting portion is connected to a side edge of the first printed circuit board.

16 . The display module according to claim 1 , wherein the display panel has a touch layer and a display layer, and the first printed circuit board comprises a display circuit and a touch circuit, wherein the display circuit is electrically connected to the display layer, and the touch circuit is electrically connected to the touch layer.

17 . The display module according to claim 16 , wherein an orthographic projection of the first printed circuit board on a light exit surface of the display panel is within a light exit surface of the display panel, and a ratio of an area of the orthographic projection of the first printed circuit board on the light exit surface of the display panel to the light exit surface of the display panel is not less than 0.5.

18 . The display module according to claim 1 , wherein at least one of a light exit surface of the display panel, a surface of the first connecting portion, and a surface of the second connecting portion has a hand-tearable adhesive film.

19 . A display device, comprising: a host and a display module;
wherein the display module comprises: a display panel, a first printed circuit board, and a flexible printed circuit board; wherein the display panel is electrically connected to the first printed circuit board, the first printed circuit board is disposed at a back of the display panel, and the flexible printed circuit board comprises a first connecting portion, a second connecting portion, and a flexible connecting structure, wherein the flexible connecting structure comprises a plurality of stacked connecting bands, two ends of the flexible connecting structure are connected to the first connecting portion and the second connecting portion respectively, the first connecting portion is connected to the first printed circuit board, and the second connecting portion is configured to be connected to the host; wherein each of the connecting bands has a first side face and a second side face, a thinning groove is disposed in the first side face of at least one of the connecting band, and the first side face of the connecting bands is opposite to the second side face o

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Su Jingchang
• Bi Xin
• Wu Jianjun
• Huang Wen
• Wang Jiahua
• Cheng Hao
• Fan Qiang
• Sun Zhenyu

Classifications

• H05K2201/10128

  Display · CPC title

• H05K1/189

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

• G06F1/1683

  for the transmission of signal or power between the different housings, e.g. details of wired or wireless communication, passage of cabling · CPC title

• G06F1/1622

  with enclosures rotating around an axis perpendicular to the plane they define or with ball-joint coupling, e.g. PDA with display enclosure orientation changeable between portrait and landscape by rotation with respect to a coplanar body enclosure · CPC title

• G06F1/1601

  Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64) · CPC title