Display module and display device

Patent metadata

Field	Value
Publication number	US-12402459-B2
Application number	US-202318108724-A
Country	US
Kind code	B2
Filing date	Feb 13, 2023
Priority date	Sep 28, 2022
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A display module and a display device are provided. The display module includes a display panel, a flexible circuit board, and a printed circuit board. The display panel includes a bonding area. The flexible circuit board and the printed circuit board are electrically bonded and connected to the display panel in the bonding area, and are connected by a connector. The connector includes a first connection board and a second connection board. A side of the first connection board includes a groove including first pins. A side of the second connection board facing the first connection board includes second pins. The first pins and the second pins have a one-to-one correspondence. The second pins are plugged into the grooves, and are in contact with and electrically connected to the first pins; and a portion of at least one of the first pins is coated with a first insulating layer.

First claim

What is claimed is:

1. A display module, comprising a display panel, a flexible circuit board, and a printed circuit board, wherein:
the display panel includes a bonding area;
the flexible circuit board and the printed circuit board are electrically bonded and connected to the display panel in the bonding area;
the flexible circuit board and the printed circuit board are connected by a connector;
the connector includes a first connection board and a second connection board;
a side of the first connection board facing the second connection board includes a groove;
the groove includes a plurality of first pins;
a side of the second connection board facing the first connection board includes a plurality of second pins;
the plurality of first pins and the plurality of second pins have a one-to-one correspondence;
the plurality of second pins is plugged into the grooves, and is in contact with and electrically connected to the plurality of first pins; and
a portion of at least one of the plurality of first pins is coated with a first insulating layer.

2. The display module according to claim 1 , wherein:
a shape of an orthographic projection of the groove on the plane where the first connection board is located includes a long strip;
the groove includes a first side wall and a second side wall;
one first pin of the plurality of first pins includes a first sub-section and a second sub-section, wherein the first sub-section is arranged on the first side wall and the second sub-section is arranged on the second side wall;
in a direction perpendicular to the plane where the first connection board is located, the first sub-section and/or the second sub-section includes a first region and a second region, wherein the first region is located at a side of the second region close to a bottom of the groove; and
in a direction from the first sub-section to the second sub-section, a thickness of the first sub-section of the first region is smaller than a thickness of the first sub-section of the second region; and/or, in the direction from the first sub-section to the second sub-section, a thickness of the second sub-section of the first region is smaller than a thickness of the second sub-section of the second region.

3. The display module according to claim 2 , wherein:
the first insulating layer is located on a surface of the first sub-section of the second region; and/or the first insulating layer is located on a surface of the second sub-section of the second region.

4. The display module according to claim 2 , wherein:
in a direction from the second region to the first region, a thickness of the first sub-section in the direction from the first sub-section to the second sub-section increases first, then does not change, and then decreases;
in the direction from the second region to the first region, a thickness of the second sub-section in the direction from the first sub-section to the second sub-section increases first, then does not change, and then decreases;
in the direction from first sub-section to the second sub-section, a region where the thicknesses of the first sub-section and the second sub-section increase is a first sub-region, and a region where the thicknesses of the first sub-region and the second sub-region remain unchanged is a second sub-region; and
the first insulating layer is coated on the first sub-section in the first sub-region and on the second sub-section of the first sub-region.

5. The display module according to claim 4 , wherein:
the first insulating layer is coated on the first sub-section in the second sub-region and on the second sub-section of the second sub-region.

6. The display module according to claim 1 , wherein:
the first insulating layer is made of a material including a metal chelate compound, and/or
a thickness of the first insulating layer is about 0.04 mm to about 0.1 mm.

7. The display module according to claim 1 , wherein:
the plurality of the first pins at least includes first sub-pins and third sub-pins, wherein signals connected to the first sub-pins and signals connected to the third sub-pins have different types;
the plurality of second pin includes second sub-pins and fourth sub-pins, wherein signals connected to the second sub-pins and signals connected to the fourth sub-pins have different types;
the second sub-pins are plugged into and correspond to the first sub-pins, and the fourth sub-pins are plugged into and correspond to the third sub-pins; and
shapes of the first sub-pins are different from shapes of the third sub-pins.

8. The display module according to claim 7 , wherein:
the display panel includes a light-emitting element, wherein the light-emitting element is connected to a first power supply signal;
the flexible circuit board and the printed circuit board are connected to a second power supply signal;
the display panel includes a touch electrode, wherein the touch electrode is connected to a touch control drive signal;
the signals connected to the first sub-pins and/or the second sub-pins include any one of the first power supply signal, the second power supply signal, or the touch control drive signal.

9. The display module according to claim 7 , wherein:
a first protrusion is disposed on the bottom of the groove at a position corresponding to the first sub-pins;
a side surface of the second sub-pins facing the first sub-pin includes a first groove;
the first sub-pins are plugged into and connected to the first groove; and
the first protrusion and the first groove are matched with each other.

10. The display module according to claim 9 , wherein:
the first sub-pins include at least a first-type first sub-pin and a second-type first sub-pin, wherein signals connected to the first-type first sub-pin and the second-type first sub-pin are different; and
a shape of the first-type first sub-pin is different form a shape of the second-type first sub-pin.

11. The display module according to claim 10 , wherein:
in the direction perpendicular to the plane where the first connection board is located, a height of the first protrusion corresponding to the first-type first sub-pin is different from a height of the first protrusion corresponding to the second-type first sub-pin; or
in a direction parallel to the plane where the first connection board is located, a width of the first protrusion corresponding to the first-type first sub-pin is different from a width of the first protrusion corresponding to the second-type first sub-pin.

12. The display module according to claim 9 , wherein:
shapes of the first groove/the first protrusion include one or more of cones, trapezoids, ovals, circles, triangles, squares, or rectangles.

13. The display module according to claim 9 , wherein:
a second groove is disposed on the bottom of the groove at a position corresponding to the third sub-pins;
a side surface of the fourth sub-pins facing the third sub-pin includes a second protrusion;
the second protrusion is plugged and connected to the second groove; and
the second protrusion and the second groove are matched with each other.

14. The display module according to claim 7 , wherein:
in the plurality of second pins, a volume of the second sub-pins is different from a volume of the fourth sub-pins.

15. The display module according to claim 14 , wherein:
the volume of the second sub-pins is larger than the volume of the fourth sub-pins.

16. The display module according to claim 14 , wherein:
in the direction parallel to the plane where the first connection board is located, a thickness of

Assignees

• Wuhan Tianma Micro Electronics Co Ltd

Inventors

• Zhang Pan
• Li Lu
• Zhu Haili
• Zou Yan

Classifications

• H05K2201/10128

  Display · CPC title

• H05K1/189

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

• H10H20/857 Primary

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H05K1/117

  Pads along the edge of rigid circuit boards, e.g. for pluggable connectors · CPC title

• H05K1/118 Primary

  specially for flexible printed circuits, e.g. using folded portions · CPC title