CN-121985470-A - Printed circuit board and display module

Abstract

The application discloses a printed circuit board and a display module, wherein the printed circuit board comprises a substrate, at least one side surface of the substrate is provided with a plurality of FPC (flexible printed circuit) connecting areas, a plurality of metal fingers which are arranged along a first interval are arranged in each FPC connecting area, the FPC connecting areas comprise at least one first FPC connecting area and at least one second FPC connecting area, projections of the first FPC connecting area and the second FPC connecting area in the same plane are alternately arranged along a first direction, projection parts of adjacent first FPC connecting areas and second FPC connecting areas in a second direction are overlapped, and the second direction and the first direction are mutually perpendicular. The application can meet the space requirement of metal finger arrangement and is beneficial to reducing the outline dimension of the printed circuit board.

Inventors

• ZHANG CUI
• LIU ZHONGJIE

Assignees

• 武汉华星光电半导体显示技术有限公司

Dates

Publication Date

20260505

Application Date

20260112

Claims (10)

1. 1. A printed wiring board, comprising: a substrate, wherein at least one side surface of the substrate is provided with a plurality of FPC (flexible printed circuit) connecting areas, and a plurality of metal fingers which are arranged at intervals along a first direction are arranged in each FPC connecting area; The plurality of FPC connecting areas comprise at least one first FPC connecting area and at least one second FPC connecting area, along the first direction, the projections of the first FPC connecting area and the second FPC connecting area in the same plane are alternately arranged, the adjacent projections of the first FPC connecting area and the second FPC connecting area in the second direction are partially overlapped, and the second direction is mutually perpendicular to the first direction.
2. 2. The printed wiring board of claim 1, wherein the substrate has a first side, the first FPC land is spaced apart from the second FPC land along the second direction, and the first FPC land is closer to the first side than the second FPC land.
3. 3. The printed wiring board of claim 2, wherein a plurality of the first FPC connection areas are located in the same row; And/or, a plurality of the second FPC connection areas are located in the same row.
4. 4. The printed wiring board of claim 2, wherein the first FPC connection area and the second FPC connection area are disposed on the same side of the substrate.
5. 5. The printed wiring board of claim 1, wherein the substrate has a first side and a second side disposed opposite each other, the first FPC connection area being disposed on the first side and the second FPC connection area being disposed on the second side.
6. 6. The printed wiring board of claim 5, wherein the projections of the first FPC connection area and the second FPC connection area in the same plane are located in the same row.
7. 7. The printed wiring board of claim 4 or 5, wherein a distance between adjacent first FPC connection areas and second FPC connection areas in the second direction is H, wherein 0.5mm ∈h ∈2mm.
8. 8. The printed wiring board of claim 4 or 5, wherein the overlapping distance of projections of adjacent first and second FPC connection areas in the second direction is D, wherein 0mm < D is less than or equal to 2mm.
9. 9. The printed wiring board of any of claims 1-4, wherein the substrate has a first side and a second side, the plurality of FPC connection areas further comprising a third FPC connection area, the first FPC connection area and the second FPC connection area being disposed proximate the first side, the third FPC connection area being disposed proximate the second side.
10. 10. A display module, comprising: A display panel; the printed wiring board according to any one of claims 1 to 9; and a plurality of FPC boards connecting the display panel and the printed wiring board.

Description

Printed circuit board and display module Technical Field The application relates to the technical field of display modules, in particular to a printed circuit board and a display module. Background The display module uses a printed circuit board to realize the electrical connection among components in the module, including signal transmission and power supply. Meanwhile, the display module is used as a mechanical support body of various electronic elements (such as a driving chip, a capacitor, a resistor and the like) in the display module. For a medium-size display module, because the circuit design is complex, the wiring is more, and the independent flexible circuit board cannot meet the device arrangement and wiring requirements, the transmission of electric signals can be realized by combining a flexible circuit board (FPC) +a hard board (PCB). The FPC is bonded on a panel (panel) through Anisotropic Conductive Film (ACF), and the PCB is bonded on the FPC through the ACF. The bonding area of Panel can design metal pin, is equipped with the metal finger with Panel pin one-to-one on FPC and the PCB, realizes signal transmission through FPC metal finger and Panel pin and PCB metal finger's switching on. Along with the function increase of middle-size display module assembly, the metal pin quantity increases, and the quantity of the metal finger that corresponds with the metal pin on FPC and the PCB increases, but PCB's length is limited, can't satisfy more required aperture of metal finger arrangement. In the related art, double rows of metal fingers are arranged to increase the number of the metal fingers, but the double rows of metal fingers occupy a larger area of the PCB, which is not beneficial to weight reduction and light weight. When double golden finger is bound, because the pins bound simultaneously are more, partial pins with uneven stress of the PCB are not conducted when the PCB is pressed easily, and abnormal display is caused. Disclosure of Invention The embodiment of the application provides a printed circuit board and a display module, which can meet the space requirement of metal finger arrangement, and is beneficial to reducing the outline dimension of the printed circuit board so as to at least partially solve the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided a printed wiring board comprising: a substrate, wherein at least one side surface of the substrate is provided with a plurality of FPC (flexible printed circuit) connecting areas, and a plurality of metal fingers which are arranged at intervals along a first direction are arranged in each FPC connecting area; The plurality of FPC connecting areas comprise at least one first FPC connecting area and at least one second FPC connecting area, along the first direction, the projections of the first FPC connecting area and the second FPC connecting area in the same plane are alternately arranged, the adjacent projections of the first FPC connecting area and the second FPC connecting area in the second direction are partially overlapped, and the second direction is mutually perpendicular to the first direction. Optionally, the substrate has a first side, along the second direction, the first FPC connection area and the second FPC connection area are spaced apart, and the first FPC connection area is closer to the first side than the second FPC connection area. Optionally, a plurality of the first FPC connection areas are located in the same row; And/or, a plurality of the second FPC connection areas are located in the same row. Optionally, the first FPC connection area and the second FPC connection area are disposed on the same side of the substrate. Optionally, the substrate has a first side and a second side that are disposed opposite to each other, the first FPC connection area is disposed on the first side, and the second FPC connection area is disposed on the second side. Optionally, the projections of the first FPC connection area and the second FPC connection area in the same plane are located in the same row. Optionally, along the second direction, a distance between the adjacent first FPC connection area and the second FPC connection area is H, wherein H is more than or equal to 0.5mm and less than or equal to 2mm. Optionally, the overlapping distance of the projections of the adjacent first FPC connection areas and second FPC connection areas in the second direction is D, wherein 0mm < D is less than or equal to 2mm. Optionally, the substrate has a first side and a second side, the plurality of FPC connection areas further includes a third FPC connection area, the first FPC connection area and the second FPC connection area are disposed near the first side, and the third FPC connection area is disposed near the second side. According to a second aspect of the present application, there is provided a display module comprising: A display panel; Th