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EP-4418243-B1 - DISPLAY MODULE AND DISPLAY DEVICE

EP4418243B1EP 4418243 B1EP4418243 B1EP 4418243B1EP-4418243-B1

Inventors

  • SU, Jingchang
  • BI, Xin
  • WU, JIANJUN
  • HUANG, WEN
  • WANG, Jiahua
  • CHENG, HAO
  • FAN, QIANG
  • SUN, ZHENYU

Dates

Publication Date
20260506
Application Date
20220816

Claims (15)

  1. A display module, configured to be rotatably connected to a host (5), the display module comprising: a display panel (11), a first printed circuit board (21), and a flexible printed circuit board (30); wherein the display panel (11) is electrically connected to the first printed circuit board (21), the first printed circuit board (21) is disposed at a back of the display panel (11), and the flexible printed circuit board (30) comprises a first connecting portion (31), a second connecting portion (32), and a flexible connecting structure (33), wherein the flexible connecting structure (33) comprises a plurality of stacked connecting bands (33a), two ends of the flexible connecting structure (33) are connected to the first connecting portion (31) and the second connecting portion (32) respectively, the first connecting portion (31) is connected to the first printed circuit board (21), and the second connecting portion (32) is configured to be connected to the host (5), characterized in that , the first connecting portion (31) and the second connecting portion (32) are formed by folding connecting side plates (310); in response to the flexible printed circuit board (30) being in an unfolded state, a length direction of the connecting side plate (310) is perpendicular to an arrangement direction of the first connecting portion (31) and the second connecting portion (32), and the connecting side plate (310) has a plurality of folding regions (311) sequentially connected in the length direction, the plurality of folding regions (311) are in one-to-one correspondence to the plurality of connecting bands (33a), and each of the folding regions (311) is connected to a corresponding connecting band (33a) thereof; and the plurality of folding regions (311) are stacked in response to the flexible printed circuit board (30) being in a folded state.
  2. The display module according to claim 1, wherein each of the connecting bands (33a) has a first side face (331) and a second side face (332), a thinning groove (330) is disposed in the first side face (331) of at least one of the connecting band (33a), and the first side face (331) of the connecting bands (33a) is opposite to the second side face (332) of an adjacent connecting band (33a) in a stacking direction.
  3. The display module according to claim 2, wherein a ratio of a length of the thinning groove (330) to a length of the connecting band (33a) ranges from 0.6 to 0.9; optionally, a width of the thinning groove (330) is equal to a width of the connecting band (33a); or optionally a ratio of a depth of the thinning groove (330) to a thickness of the connecting band (33a) ranges from 0.3 to 0.7.
  4. The display module according to any one of claims 1 to 3, wherein in response to the flexible printed circuit board (30) being in an unfolded state, the connecting bands (33a) are spaced apart in parallel, and each of the connecting bands (33a) has a same shape and area.
  5. The display module according to claim 4, wherein the flexible connecting structure (33) is linear, and the flexible connecting structure (33) runs through a line connecting a geometric center of the first connecting portion (31) to a geometric center of the second connecting portion (32).
  6. The display module according to claim 4, wherein the flexible connecting structure (33) is in a fan ring shape, and a middle region of the flexible connecting structure (33) is outside a line connecting a geometric center of the first connecting portion (31) to a geometric center of the second connecting portion (32).
  7. The display module according to claim 1, wherein each of the first connecting portion (31) and the second connecting portion (32) further comprises a connecting structure (320), wherein the connecting structure (320) and the connecting band (33a) are disposed on opposite sides of the connecting side plate (310) respectively; and the display module further comprises a connector (41) disposed on the connecting structure (320) of the second connecting portion (32), wherein the connector (41) is configured to be connected to a second printed circuit board (22) within the host (5); optionally, a ratio of a width of the connecting band (33a) to a width of the folding region (311) to which the connecting band (33a) is connected ranges from 0.3 to 0.7.
  8. The display module according to claim 7, wherein the connecting structure (320) comprises a connecting plate (321) and two clamping plates (322) spaced apart in parallel, wherein the connecting plate (321) is disposed between the two clamping plates (322) and two sides of the connecting plate (321) are connected to the two clamping plates (322) respectively, the connector (41) is disposed between the two the clamping plates (322) and is connected to one of the two clamping plates (322), and the second printed circuit board (22) is disposed between the two clamping plates (322).
  9. The display module according to claim 8, wherein the flexible printed circuit board (30) comprises a first conductive layer (301), an insulative layer (302), and a second conductive layer (303) that are stacked sequentially in a thickness direction; and at least part of a region of the connecting structure (320) of the first conductive layer (301) or the second conductive layer (303) is in a mesh shape.
  10. The display module according to any one of claims 1 to 3, 5, and 7 to 9, wherein the flexible printed circuit board (30) further comprises a protective layer (43), wrapped around the plurality of connecting bands (33a); optionally, the first printed circuit board (21) and the flexible printed circuit board (30) are integrally formed.
  11. The display module according to claim 10, wherein the first connecting portion (31) is connected to a side edge of the first printed circuit board (21).
  12. The display module according to any one of claims 1 to 3, 5, and 7 to 9, wherein the display panel (11) has a touch layer and a display layer, and the first printed circuit board (21) 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.
  13. The display module according to claim 12, wherein an orthographic projection of the first printed circuit board (21) on a light exit surface of the display panel (11) is within a light exit surface of the display panel (11), and a ratio of an area of the orthographic projection of the first printed circuit board (21) on the light exit surface of the display panel (11) to the light exit surface of the display panel (11) is not less than 0.5.
  14. The display module according to any one of claims 1 to 3, 5, and 7 to 9, wherein at least one of a light exit surface of the display panel (11), a surface of the first connecting portion (31), and a surface of the second connecting portion (32) has a hand-tearable adhesive film (70).
  15. A display device, comprising: a host (5) and the display module as defined in any one of claims 1 to 13; wherein the display device further comprises a hollow rotation shaft (50), one end of the hollow rotation shaft (50) is connected to the display module (10), the other end of the hollow rotation shaft (50) is movably mounted on the host (5), and the connecting band (33a) is disposed within the hollow rotation shaft (50).

Description

TECHNICAL FIELD The present application related to the field of display technologies, and in particular, relates to a display module and a display device, BACKGROUND The display device is a device having an image display function. The display device may be a product such as a phone, a tablet computer. For example, the phones often need to be placed horizontally or vertically during use to control the phone to be switched as a horizontal or vertical screen. US 2006/007644 A1 discloses rotatable computer display apparatus and method, including: a first link pivotally coupled to the housing and a display screen and a second link pivotally coupled to the housing. CN 1614974 A discloses a hinge device for a mobile phone having a rotation type display, including a body housing, a folder having a display unit, and a connection member. KR 20220112603 A discloses a foldable electronic device, including: a hinge structure, a flexible display, and a flexible circuit board. SUMMARY Embodiments of the present disclosure provide a display module and a display device. The technical solution is as follows. Embodiments of the present disclosure provide a display module, configured to be rotatably connected to a host, the display module including: 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, 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; andthe plurality of folding regions are stacked in response to the flexible printed circuit board being in a folded state. In some embodiments of the present disclosure, 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 ab adjacent connecting band in a stacking direction. In some embodiments of the present disclosure, a ratio of a length of the thinning groove to a length of the connecting band ranges from 0.6 to 0.9; optionally,, a width of the thinning groove is equal to a width of the connecting band; andoptionally,, a ratio of a depth of the thinning groove to a thickness of the connecting band ranges from 0.3 to 0.7. In some embodiments of the present disclosure, 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. In some embodiments of the present disclosure, 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. In some embodiments of the present disclosure, 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. In some embodiments of the present disclosure, each of the first connecting portion and the second connecting portion further includes a connecting structure, and the connecting structure wherein the connecting band are disposed on opposite sides of the connecting side plate respectively; and the display module further includes 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; and optionally, a ratio of a width of the connecting band to a width of the folding region to which the connecting band is connected ranges from 0.3 to 0.7. In some