Flexible circuit board, printed circuit board, display panel and electronic device

Abstract

Embodiments of the present disclosure provide a flexible circuit board, a printed circuit board, a display panel, and an electronic device. The flexible circuit board includes: a first surface including a plurality of first pins arranged in parallel side by side, and the plurality of first pins are located at a first end of the flexible circuit board; a second surface, which is the back surface of the first surface, includes a plurality of second pins arranged in parallel side by side, and the plurality of second pins are located at a second end of the flexible circuit board, and the first pins on the first end and the second pins on the second end are connected to respective corresponding third pins on a third end of the flexible circuit board. Embodiments of the present disclosure can optimize the pin arrangement method and improve the product yield.

Description

Technical Field

[0001] The present disclosure relates to the technical field of circuit design, and particularly to a flexible circuit board, a printed circuit board, a display panel and an electronic device. Background Art

[0002] OLED (Organic Light-Emitting Display) is an organic light-emitting display. OLED is also referred to as the third-generation display technology. OLED is not only thinner, lower in energy consumption, higher in brightness, better in luminous efficiency, and can display pure black, but can also be bent, such as curved screen TVs and curved screen mobile phones. Nowadays, major international manufacturers are continuously increasing their R & D investment in OLED technology, making OLED technology more and more widely used in the fields of TVs, computers (monitors), mobile phones, tablets, etc. Therefore, how to make OLED devices or other electronic devices perform better and be more intensive is a technical problem to be solved in this field. Summary of the Invention

[0003] Embodiments of the present disclosure provide a flexible circuit board, a printed circuit board, a display panel and an electronic device to solve or alleviate one or more technical problems in the prior art.

[0004] As a first aspect of the embodiments of the present disclosure, embodiments of the present disclosure provide a flexible circuit board, including:

[0005] A first surface, including a plurality of first pins arranged in parallel side by side, and the plurality of first pins are located at the first end of the flexible circuit board;

[0006] A second surface, which is the back of the first surface, includes a plurality of second pins arranged in parallel side by side, and the plurality of second pins are located at the second end of the flexible circuit board. The first pins at the first end and the second pins at the second end are connected to respective corresponding third pins at the third end of the flexible circuit board.

[0007] In a possible implementation, the first end and the second end are side by side, and the orthographic projection of the first pins at the first end on the flexible circuit board does not overlap with the orthographic projection of the second pins at the second end on the flexible circuit board.

[0008] In a possible implementation, the third pins are arranged on the first surface.

[0009] In a possible implementation, the third pins are arranged on the second surface.

[0010] In a possible implementation, the flexible circuit board is of a Y-shaped structure, the first end and the second end are branches of the Y-shaped structure, and the third end is the main trunk of the Y-shaped structure.

[0011] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a printed circuit board, including:

[0012] A third surface including at least one first bonding pin area, the first bonding pin area including a plurality of fourth pins for connecting to a plurality of first pins on the first surface of a flexible circuit board according to any one of the embodiments of the present disclosure;

[0013] A fourth surface, which is the back surface of the third surface, including at least one second bonding pin area, the second bonding pin area including a plurality of fifth pins for connecting to a plurality of second pins on the second surface of the flexible circuit board, and the first bonding pin area and the second bonding pin area are located at the same end of the printed circuit board.

[0014] In a possible implementation, the third surface includes a plurality of first bonding pin areas, the fourth surface includes a plurality of second bonding pin areas, and the first bonding pin areas on the third surface and the second bonding pin areas on the fourth surface are arranged side by side and in parallel.

[0015] In a possible implementation, the orthographic projections of adjacent first bonding pin areas and second bonding pin areas on the printed circuit board have an overlapping area.

[0016] As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display panel, including:

[0017] A printed circuit board according to any one of the embodiments of the present disclosure;

[0018] At least one flexible circuit board according to any one of the embodiments of the present disclosure;

[0019] A panel body including at least one third bonding pin area, the third bonding pin area including a plurality of sixth pins;

[0020] Wherein, a plurality of first pins at the first end of the flexible circuit board are connected to a plurality of fourth pins in the corresponding first bonding pin area on the printed circuit board, a plurality of second pins at the first end of the flexible circuit board are connected to a plurality of fifth pins in the corresponding second bonding pin area on the printed circuit board, and a plurality of third pins at the second end of the flexible circuit board are connected to a plurality of sixth pins in the corresponding third bonding pin area on the panel body.

[0021] As a fourth aspect of the embodiments of the present disclosure, the present disclosure provides an electronic device including the display panel according to any one of the embodiments of the present disclosure.

[0022] The technical solution provided by the embodiments of the present disclosure bifurcates the pins led out from the same end of the flexible circuit board to form two ends led out, and the pins led out from the two ends are respectively located on the front and the back. In this way, when multiple flexible circuit boards are connected to the printed circuit board, the pin areas on two adjacent flexible circuit boards can overlap, making the pin arrangement more intensive.

[0023] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments in accordance with the present disclosure and should not be regarded as limiting the scope of the present disclosure.

[0025] Figure 1 is a schematic cross-sectional view of a display module according to an embodiment of the present disclosure;

[0026] Figure 2 is a schematic plan view of a display module according to an embodiment of the present disclosure;

[0027] Figure 3 is a schematic front view of a flexible circuit board according to an embodiment of the present disclosure;

[0028] Figure 4 is a schematic back view of a flexible circuit board according to an embodiment of the present disclosure;

[0029] Figure 5 is a schematic structural view of a display panel according to an embodiment of the present disclosure;

[0030] Figure 6 is a schematic front view of a printed circuit board according to an embodiment of the present disclosure;

[0031] Figure 7 is a schematic back view of a printed circuit board according to an embodiment of the present disclosure;

[0032] Figure 8 is a cross-sectional view of a display panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and the description are to be regarded as illustrative in nature and not restrictive.

[0034] Figure 1 It is a cross-sectional schematic diagram of a display module according to an embodiment of the present disclosure. Figure 2 It is a plan schematic diagram of a display module according to an embodiment of the present disclosure. As Figure 1 shown, the large and medium-sized flexible multi-layer integrated touch (FMLOC) OLED display module 100 includes a source chip 101 (Source IC), a panel 102 (Panel, PNL), a printed circuit board 103 (Printed Circuit Board, PCB), and a flexible printed circuit board 104 (Flexible Printed Circuit, FPC). The Source IC is bonded to the panel by a COP (Chip on plastic) packaging method, and the printed circuit board 103 is connected to the panel 102 through the flexible printed circuit board 104. Among them, one or more electronic devices 105 are provided on the printed circuit board 103.

[0035] Compared with other OLED products, the traces of the FMLOC display module 100 are concentrated in the panel bonding area (PNL PAD). Therefore, the number of pins of the panel 102 increases, and the number of pins of the matching flexible printed circuit board 104 and the printed circuit board 103 also increases accordingly. In addition, with the improvement of the product resolution, the number of bonding pins in the panel bonding area further increases. Moreover, the width of the head of the bonding pin in the panel bonding area is wider than that of the flexible printed circuit board 104. Therefore, a certain safety distance needs to be reserved between adjacent flexible printed circuit boards 104 on the panel bonding area. As Figure 2 shown, this design will cause waste of space between two adjacent flexible printed circuit boards 104 on the printed circuit board 103, and pins cannot be arranged at this position on the printed circuit board 103. On the other hand, with the increase in the number of pins, the position area of the pin bonding area on the printed circuit board 103 remains unchanged, which will further compress the pin width and pin pitch, and the yield of the product will also decrease accordingly.

[0036] Therefore, the present disclosure provides a solution to solve the above problems.

[0037] Figure 3 It is a front schematic diagram of a flexible printed circuit board 200 according to an embodiment of the present disclosure. Figure 4 It is a back schematic diagram of a flexible printed circuit board 200 according to an embodiment of the present disclosure. As Figure 3 and Figure 4As shown, the flexible circuit board 200 includes a first surface 201 and a second surface 202. The first surface 201 includes a plurality of first pins 203 arranged side by side and in parallel, and the plurality of first pins 203 are located at the first end 210 of the flexible circuit board 200. The second surface 202 is the back surface of the first surface 201. The second surface 202 includes a plurality of second pins 204 arranged side by side and in parallel, and the plurality of second pins 204 are located at the second end 220 of the flexible circuit board 200. The first pins 203 at the first end 210 and the second pins 204 at the second end 220 are connected to respective corresponding third pins 205 at the third end 230 of the flexible circuit board 200. Among them, the first surface 201 can be the front surface of the flexible circuit board 200, and the second surface 202 can be the back surface of the flexible circuit board 200. These two can also be reversed.

[0038] In the embodiments of the present disclosure, the pins at one end of the flexible circuit board 200 are divided from single-sided pins to double-sided pins and bifurcated to form two ends to connect to the double-sided pin areas of the corresponding printed circuit board.

[0039] Figure 5 It is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.

[0040] As Figure 5 shown, when a plurality of flexible circuit boards 200 are connected to the printed circuit board 300, the pin areas on the front and back of two adjacent flexible circuit boards 200 on the printed circuit board 300 can overlap each other, and there is no need to reserve a safety distance between two adjacent flexible circuit boards 200 on the printed circuit board 300, improving the resource utilization rate of the pin areas on the printed circuit board 300. In addition, adopting the design solution of the embodiments of the present disclosure, even if the number of pins is increased, the pin width and pin pitch can not be compressed, improving the yield of the product.

[0041] As Figure 3 and Figure 4 shown, the first end 210 and the second end 220 are arranged side by side, and the orthographic projection of the first pins 203 on the first end 210 on the flexible circuit board 200 does not overlap with the orthographic projection of the second pins 204 on the second end 220 on the flexible circuit board 200.

[0042] The third pins 205 at the third end 230 of the flexible circuit board 200 can be arranged on the first surface 201 or on the second surface 202. For example, as Figure 4 shown, the third pins 205 are arranged on the second surface 202.

[0043] As Figure 3 and Figure 4 shown, the flexible circuit board 200 can be a Y-shaped structure, the first end 210 and the second end 220 are the branches of the Y-shaped structure, and the third end 230 is the main trunk of the Y-shaped structure.

[0044] Figure 6 is a front view schematic diagram of a printed circuit board 300 according to an embodiment of the present disclosure, Figure 7 is a back view schematic diagram of a printed circuit board 300 according to an embodiment of the present disclosure.

[0045] As Figure 6 and Figure 7 shown, the printed circuit board 300 includes a third surface 301 and a fourth surface 302. The third surface 301 includes at least one first bonding pin area 303, and the first bonding pin area 303 includes a plurality of fourth pins 304. The plurality of fourth pins 304 are used to connect a plurality of first pins 203 in the first surface 201 of the flexible circuit board 200 provided in any embodiment of the present disclosure. The fourth surface 302 is the back of the third surface 301, and the fourth surface 302 includes at least one second bonding pin area 305. The second bonding pin area 305 includes a plurality of fifth pins 306, and the plurality of fifth pins 306 are used to connect a plurality of second pins 204 in the second surface 202 of the flexible circuit board 200. The first bonding pin area 303 and the second bonding pin area 305 are located at the same end in the printed circuit board 300.

[0046] As Figure 6 and Figure 7 shown, the third surface 301 includes a plurality of first bonding pin areas 303, the fourth surface 302 includes a plurality of second bonding pin areas 305, and the first bonding pin areas 303 in the third surface 301 and the second bonding pin areas 305 in the fourth surface 302 are arranged side by side and parallel to each other.

[0047] As Figure 6 and Figure 7 shown, there is an overlapping area in the orthographic projection on the printed circuit board 300 between adjacent first bonding pin areas 303 and second bonding pin areas 305 in the printed circuit board 300.

[0048] In this example, there is an overlapping area in the orthographic projection on the printed circuit board 300 for some or all of the first bonding pin areas 303 and the second bonding pin areas 305 on the printed circuit board 300.

[0049] Therefore, as Figure 5 shown, adjacent flexible circuit boards 200 on the printed circuit board 300 can overlap each other without leaving a safety distance, improving the space utilization rate of the printed circuit board 300. In addition, the pin width and the spacing between pins can be increased while keeping the number of pins unchanged. The number of pins can be increased while keeping the pin width and the spacing between pins unchanged. Thus, while improving the intensification level of the product, the yield rate of the product remains unchanged or is increased.

[0050] Figure 8 It is a cross-sectional view of a display panel according to an embodiment of the present disclosure.

[0051] As Figure 5 and Figure 8 shown, the display panel includes a printed circuit board 300 and at least one flexible circuit board 200.

[0052] The panel body 400 includes at least one third bonding pin area (not shown), and the third bonding pin area includes a plurality of sixth pins (not shown). A plurality of first pins 203 in the first end 210 of the flexible circuit board 200 are connected to a plurality of fourth pins 304 in the corresponding first bonding pin area 303 of the printed circuit board 300, a plurality of second pins 204 in the first end 210 of the flexible circuit board 200 are connected to a plurality of fifth pins 306 in the corresponding second bonding pin area 305 of the printed circuit board 300, and a plurality of third pins 205 in the second end 220 of the flexible circuit board 200 are connected to a plurality of sixth pins in the corresponding third bonding pin area of the panel body.

[0053] In the embodiment of the present disclosure, adjacent flexible circuit boards 200 on the printed circuit board 300 can overlap each other without the need to reserve a safety distance, improving the space utilization rate of the printed circuit board 300. In addition, without changing the number of pins, the pin width and the pitch between pins can be increased. Without changing the pin width and the pitch between pins, the number of pins can be increased. Thus, while improving the intensification level of the product, the yield rate of the product remains unchanged or is improved.

[0054] The embodiment of the present disclosure also provides an electronic device including the display panel according to any embodiment of the present disclosure. The electronic device can be a mobile phone, a tablet computer, a computer, a smart watch, a vehicle-mounted device, etc.

[0055] In the present disclosure, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality of" means two or more unless otherwise specifically defined.

[0056] In this disclosure, unless otherwise clearly defined or limited, terms such as "install", "connect", "couple", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0057] In this disclosure, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0058] The above disclosure provides many different embodiments or examples for implementing different structures of this disclosure. To simplify this disclosure, the components and settings of specific examples are described above. Of course, they are only examples and are not intended to limit this disclosure. In addition, this disclosure may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0059] The above are only the specific embodiments of this disclosure, but the protection scope of this disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by this disclosure can easily think of various changes or substitutions, and these should all be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure shall be subject to the protection scope of the claims.

Claims

1. A flexible circuit board, characterized in that, Comprising: A first surface, including a plurality of first pins arranged side by side and in parallel, and the plurality of first pins are located at a first end of the flexible circuit board; A second surface, which is the back surface of the first surface, includes a plurality of second pins arranged side by side and in parallel, and the plurality of second pins are located at a second end of the flexible circuit board. The first pins on the first end and the second pins on the second end are connected to respective corresponding third pins on a third end of the flexible circuit board; Wherein, the first end and the second end are side by side, and the orthographic projection of the first pins on the first end on the flexible circuit board does not overlap with the orthographic projection of the second pins on the second end on the flexible circuit board. The flexible circuit board is of a Y-shaped structure, and the first end and the second end are branches of the Y-shaped structure.

2. The flexible circuit board according to claim 1, wherein The third pins are arranged on the first surface.

3. The flexible circuit board according to claim 1, wherein The third pins are arranged on the second surface.

4. The flexible circuit board according to claim 1, wherein, The third end is the main trunk of the Y-shaped structure.

5. A printed circuit board, characterized in that, Comprising: A third surface, including at least one first bonding pin area, and the first bonding pin area includes a plurality of fourth pins, and the plurality of fourth pins are used to connect to the plurality of first pins in the first surface of the flexible circuit board according to any one of claims 1 to 4; A fourth surface, which is the back surface of the third surface, includes at least one second bonding pin area, and the second bonding pin area includes a plurality of fifth pins, and the plurality of fifth pins are used to connect to the plurality of second pins in the second surface of the flexible circuit board. The first bonding pin area and the second bonding pin area are located at the same end in the printed circuit board.

6. The printed circuit board according to claim 5, characterized in that, The third surface includes a plurality of the first bonding pin areas, the fourth surface includes a plurality of the second bonding pin areas, and the first bonding pin areas in the third surface and the second bonding pin areas in the fourth surface are arranged side by side and in parallel.

7. The printed circuit board according to claim 6, wherein The orthographic projections on the printed circuit board of the adjacent first bonding pin area and the second bonding pin area in the printed circuit board have an overlapping area.

8. A display panel, characterized in that, Comprising: The printed circuit board according to any one of claims 5 to 7; At least one flexible circuit board according to any one of claims 1 to 4; A panel body, including at least one third bonding pin area, and the third bonding pin area includes a plurality of sixth pins; Wherein, the plurality of first pins in the first end of the flexible circuit board are connected to the plurality of fourth pins in the corresponding first bonding pin area in the printed circuit board, the plurality of second pins in the second end of the flexible circuit board are connected to the plurality of fifth pins in the corresponding second bonding pin area in the printed circuit board, and the plurality of third pins in the third end of the flexible circuit board are connected to the plurality of sixth pins in the corresponding third bonding pin area in the panel body.

9. An electronic device, characterized in that, Including the display panel according to claim 8.

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