CN-115497383-B - Flexible display module and display device

Abstract

The application discloses a flexible display module and a display device. The flexible display module comprises a flexible display panel, a flexible circuit board and a sealing structure, wherein the flexible display panel comprises a display part, a binding part and a bending part, and the binding part is bent to the non-display side of the display part through the bending part, so that the narrow frame design of the flexible display panel is realized. The connecting section ensures signal transmission between the flexible circuit board and the flexible display panel. And a heightening layer is further arranged between the display part and the binding part and used for adjusting the bending radius of the bending part, so that the metal wiring in the bending area is prevented from being broken due to larger bending stress. The sealing structure is arranged on one side of the flexible circuit board in the first direction and is connected with the opening, so that the opening is completely covered, the flexible display module wiring corrosion caused by sweat intrusion through the hollowed-out space is prevented, and the abnormal display problems of screen blackout, screen flashing and the like are improved.

Inventors

• LIU YAKUN

Assignees

• 昆山国显光电有限公司

Dates

Publication Date

20260505

Application Date

20221026

Claims (15)

1. 1. A flexible display module, comprising: The flexible display panel comprises a display part, a binding part and a bending part, wherein the bending part is used for connecting the display part and the binding part; The heightening layer is positioned between the display part and the binding part; the flexible circuit board comprises a connecting section and an inclined section which are positioned on the non-display side of the display part and are sequentially connected along the direction away from the bending part, the connecting section is connected with the binding part, the inclined section, the display part and the pad high layer are enclosed to form a hollowed-out space extending along the first direction, and openings are formed at two ends of the hollowed-out space in the first direction; The sealing structure is arranged on at least one side of the flexible circuit board in the first direction and is connected with at least one opening of the hollowed-out space in a sealing mode, the sealing structure comprises a sealing part which completely covers the opening, and the sealing part is formed in an extending mode along the second direction; The sealing part comprises a first side surface, a second side surface and a third side surface for connecting the first side surface and the second side surface, the first side surface is perpendicular to the second side surface and is attached to the flexible circuit board, and the second side surface faces the display part; One end of the third side surface is connected to one end of the first side surface, which is away from the flexible display panel, the other end of the third side surface is connected to one end of the second side surface, which is away from the flexible circuit board, and the third side surface is an inclined surface or an arc surface; One of the sealing part and the heightening layer is provided with a protruding part, the other one is provided with a groove, the protruding part is connected with the groove in a buckling mode, the protruding part is arranged on the sealing part, and the groove is located on the heightening layer.
2. 2. The flexible display module according to claim 1, wherein, One of the sealing part and the flexible circuit board is provided with a protruding part, the other is provided with a groove, and the protruding part is connected with the groove in a buckling mode.
3. 3. A flexible display module according to claim 2, wherein a partial number of the grooves are located in the flexible circuit board.
4. 4. The flexible display module according to claim 2, wherein a part of the number of protruding portions are snap-connected with the hollowed-out space.
5. 5. A flexible display module according to claim 2, wherein the area of a cross section of the sealing portion perpendicular to the first direction is larger than the area of a cross section of the opening perpendicular to the first direction.
6. 6. The flexible display module according to claim 2, wherein the height of the sealing portion is greater than the height of the hollow space in the thickness direction of the display portion, and the length of the sealing portion is greater than the length of the hollow space in the direction in which the bending portion points to the raised layer.
7. 7. The flexible display module according to claim 1, wherein the sealing structure further comprises a cover portion, the cover portion is located at least on a side of the inclined section away from the hollowed-out space, the cover portion is connected to the sealing portion, and the cover portion is connected to the flexible circuit board.
8. 8. The flexible display module of claim 1, wherein the first side is perpendicular to the display portion, and the third side forms an acute angle with the display portion.
9. 9. The flexible display module according to claim 1, wherein, The flexible display module further comprises an integrated circuit, wherein the integrated circuit is positioned at one side of the binding part far away from the display part, the integrated circuit is positioned between the flexible circuit board and the bending part, and the integrated circuit and the flexible circuit board are arranged at intervals; And/or, the flexible display module further comprises conductive adhesive, and the conductive adhesive is positioned between the connecting section and the binding part.
10. 10. The flexible display module of claim 1, wherein the flexible circuit board and the sealing structure are integrally formed.
11. 11. The flexible display module of claim 1, wherein the flexible display module comprises a support layer on a side of the display portion proximate to the binding portion, the support layer comprising: the support film is positioned on one side of the display part, which is close to the binding part; and the buffer layer is positioned on one side of the support film away from the display part.
12. 12. The flexible display module of claim 11, wherein the support layer further comprises a metal layer on a side of the buffer layer facing away from the support film, and the flexible circuit board further comprises an extension section on a side of the inclined section facing away from the connection section, the metal layer being connected to the extension section and being led out of the metal layer when static electricity is generated by the flexible circuit board.
13. 13. The flexible display module according to claim 1, wherein the number of the sealing structures is two, and the two sealing structures are disposed on two sides of the flexible circuit board in the first direction and are hermetically connected to the opening of the hollowed-out space.
14. 14. A flexible display module, comprising: The flexible display panel comprises a display part, a binding part and a bending part, wherein the bending part is used for connecting the display part and the binding part; The heightening layer is positioned between the display part and the binding part; the flexible circuit board comprises a connecting section and an inclined section which are positioned on the non-display side of the display part and are sequentially connected along the direction away from the bending part, the connecting section is connected with the binding part, the inclined section, the display part and the pad high layer are enclosed to form a hollowed-out space extending along the first direction, and openings are formed at two ends of the hollowed-out space in the first direction; The sealing structure is arranged on at least one side of the flexible circuit board in the first direction and is connected with at least one opening of the hollowed-out space in a sealing mode, the sealing structure comprises a sealing part which completely covers the opening, and the sealing part is formed in an extending mode along the second direction; The number of the sealing structures is two, and the two sealing structures are arranged on two sides of the flexible circuit board in the first direction and are hermetically connected with the opening of the hollowed-out space; one of the sealing part and the flexible circuit board is provided with a protruding part, the other is provided with a groove, and the protruding part is in buckling connection with the groove; One of the sealing part and the heightening layer is provided with a protruding part, the other one is provided with a groove, and the protruding part is in buckling connection with the groove; The flexible circuit board also comprises an extension section positioned at one side of the inclined section far away from the connecting section, wherein the sealing part and the corresponding protruding part or the corresponding groove of the flexible circuit board are positioned at the extension section, and the groove is positioned on the flexible circuit board; part of the protruding parts are in buckling connection with the hollowed-out space; The sealing structure further comprises a covering part, wherein the covering part is at least positioned at one side of the inclined section, which is away from the hollowed-out space, and is connected with the sealing part, and the covering part is connected with the flexible circuit board.
15. 15. A display device comprising the flexible display module of any one of claims 1-14.

Description

Flexible display module and display device Technical Field The application relates to the field of display, in particular to a flexible display module and a display device. Background With the development of flexible display technology, flexible display screens have become a development trend of future display terminals. Users have increasingly high screen duty cycle requirements, which has led to increased attention in the industry for full screen displays of electronic devices. In order to achieve the full-screen display effect of the flexible display panel, a method of bending the non-display area is generally adopted, namely, the non-display area of the flexible display panel is bent to the back surface of the flexible display panel, so that the width of a frame of a screen body is reduced, and the screen occupation ratio is further improved. After the bending area is bent, a hollowed-out space can be formed at the step, sweat can gather at the hollowed-out space and invade the screen body to cause metal wiring corrosion, and therefore abnormal display problems such as screen blackout and screen flashing are caused. Disclosure of Invention The embodiment of the application provides a flexible display module and a display device, which aim to solve the problem of abnormal display such as screen blackout, screen flashing and the like. An embodiment of a first aspect of the present application provides a flexible display module, including: The flexible display panel comprises a display part, a binding part and a bending part for connecting the display part and the binding part, wherein the display part comprises a display side and a non-display side which are oppositely arranged, and the binding part is bent to the non-display side of the display part through the bending part; The heightening layer is positioned between the display part and the binding part; the flexible circuit board comprises a connecting section and an inclined section which are positioned on the non-display side of the display part and are sequentially connected along the direction away from the bending part, the connecting section is connected with the binding part, the inclined section, the display part and the heightening layer are enclosed to form a hollowed-out space extending along the first direction, and openings are formed at two ends of the hollowed-out space along the first direction; The sealing structure is arranged on at least one side of the flexible circuit board in the first direction and is connected with the opening of the at least one hollowed-out space in a sealing mode, and the sealing structure comprises a sealing part which completely covers the opening. Optionally, one of the sealing part and the flexible circuit board is provided with a protruding part, the other is provided with a groove, and the protruding part is connected with the groove in a buckling way; Optionally, the protruding part is arranged on the sealing part, the groove is positioned on the heightening layer, and/or the groove is positioned on the flexible circuit board, and/or the hollowed-out space is multiplexed into the groove, and the protruding part is in buckle connection with the hollowed-out space; optionally, the area of the cross section of the sealing portion perpendicular to the first direction is larger than the area of the cross section of the opening perpendicular to the first direction. Optionally, the height of the sealing part is larger than the height of the hollowed-out space along the thickness direction of the display part, and the length of the sealing part is larger than the length of the hollowed-out space along the direction that the bending part points to the pad layer. Optionally, the sealing structure further comprises a covering part, the covering part is at least located at one side of the inclined section, which is away from the hollowed-out space, and the covering part is connected to the sealing part. Optionally, the sealing part includes a first side, a second side and a third side connecting the first side and the second side, the first side is perpendicular to the second side and is attached to the flexible circuit board, and the second side faces the display part; optionally, one end of the third side surface is connected to one end of the first side surface, which is away from the flexible display panel, the other end of the third side surface is connected to one end of the second side surface, which is away from the flexible circuit board, and the third side surface is an inclined surface or an arc surface; optionally, the first side surface is perpendicular to the display portion, and an included angle between the third side surface and the display portion is an acute angle. Optionally, the flexible display module further comprises an integrated circuit, the integrated circuit is located at one side of the binding portion far away from the display portion, the integrated circuit is located between the fl