CN1271901C - Flexible circuit board connection structure - Google Patents

Abstract

The invention provides a flexible circuit board connecting structure, which comprises: the flexible printed circuit board comprises a substrate, a plurality of driving circuits arranged on the substrate, at least one opening arranged on the back surface of the substrate, a connector arranged in the opening, and a plurality of flexible printed circuit boards used for connecting the driving circuits and the connector.

Description

Flexible circuit board connection structure

technical field

The invention relates to a connection structure of a flexible circuit board, in particular to a connection structure of a flexible circuit board of a portable panel.

Background technique

Flexible circuit board is a kind of flexible circuit board. Because it can greatly reduce the space occupied by the circuit board, it has been widely used in various electronic products, especially portable and thin Electronic products, including mobile phones, digital cameras, portable VCD/DVD and car monitors, etc. Flexible circuit boards are mostly used as a connector in practical applications, connected between different circuit components, such as between the display panel and the signal control circuit, to transmit image signals to the display panel, and control the display panel The screen above is displayed.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a conventional flexible printed circuit board connection structure. As shown in Figure 1, a substrate 10, such as a liquid crystal display panel, includes: a display area 12 arranged in the center of the substrate 10, a peripheral circuit area 14 arranged in the peripheral area of the substrate 10, and a plurality of peripheral circuit areas 14 arranged in the peripheral circuit area 14 A gate driving circuit 16 on one side, a plurality of data driving circuits 18 disposed on the other side of the peripheral circuit area 14 , and a flexible circuit board 20 connected to the gate driving circuit 16 and the data driving circuit 18 .

The gate driving circuit 16 and the data driving circuit 18 are respectively connected to the criss-crossing data lines and scanning lines on the substrate 10 to control the X-axis and Y-axis signals of the substrate 10 . As far as the current mass production process technology is concerned, since the gate drive circuit 16 and the data drive circuit 18 cannot be directly fabricated on the substrate 10, the current assembly method is usually to use the gate drive circuit 16 and the data drive circuit 18 by tape Bonding (tape carrier package, TCP) or glass-on-glass (chip on glass, COG) and other packaging methods are pressed on the substrate 10, and the flexible cable 22 on the flexible circuit board 20 is used to connect to the signal control circuit. The image signal is transmitted from the signal control circuit to the data line and the scanning line.

Since portable panels have high requirements for brightness and module thickness, most of the known flexible circuit board connection structures use a long-bar flexible circuit board 20 as the gate drive circuit 16, data The connection interface between the driving circuit 18 and other electronic components. The strip-type flexible circuit board includes multiple groups of circuit wires, which must be connected to each corresponding drive circuit. Therefore, when the flexible circuit board is attached to the substrate, it must be carefully aligned, especially in the flexible circuit board. In manufacturing, the precise position of each circuit wire is highly required to avoid the problem of supply difference or deviation between the flexible circuit board and the driving circuit of the substrate. Nevertheless, the length of the flexible circuit board will still increase with the increase in the size of the display panel, especially for a display panel of more than 10 o'clock, the length of a single flexible circuit board is too long, and the precision requirement is quite high, and The manufacturing and alignment processes of flexible circuit boards are not easy to control, so the price of flexible circuit boards is too expensive, and the loss of yield is very high, which is not conducive to the development and application of portable panels.

Contents of the invention

Therefore, the object of the present invention is to provide a flexible circuit board connection structure, which can reduce the production cost of the portable panel and improve the yield of products.

In a preferred embodiment of the present invention, the flexible circuit board connection structure includes: a substrate, a plurality of driving circuits arranged on the substrate, at least one opening arranged on the back of the substrate, and a connector arranged in the opening, And a plurality of flexible printed circuit boards for connecting drive circuits and connectors.

Since the present invention uses a plurality of flexible circuit boards to be connected to each corresponding driving circuit, it can avoid the possible alignment deviation problem of the known single-chip long flexible circuit board, and at the same time make the flexible circuit board When it is attached to the substrate, it can have a reasonable range in terms of precision requirements, so as to reduce the production cost of the portable panel and improve the product qualification rate. In addition, the present invention also uses a connector to connect these flexible circuit boards, and the connector is arranged in the opening on the back of the substrate, so the thickness of the connector can be accommodated by the opening on the back of the substrate without increasing the overall size of the substrate. Thickness, which is conducive to the thinning application of the substrate.

Description of drawings

FIG. 1 is a schematic diagram of a conventional flexible circuit board connection structure.

FIG. 2 and FIG. 3 are schematic diagrams of a flexible circuit board connection structure of a portable panel of the present invention.

Explanation of reference symbols:

10, 30 Substrate 12, 32 Display area

14, 34 Peripheral circuit area 16, 36 Gate drive circuit

18, 38 Data-driven circuit 20, 40, 44 Flexible circuit board

22 Flexible cable 42 Connector

46 openings

Detailed ways

Referring to FIG. 2 , FIG. 2 is a schematic diagram of a flexible printed circuit board connection structure of a portable panel of the present invention. As shown in FIG. 2 , a substrate 30 includes: a display area 32 disposed at its center, a peripheral circuit area 34 disposed on the peripheral area of the substrate 30 , a plurality of gate drivers disposed on one side of the peripheral circuit area 34 The circuit 36 , a plurality of data driving circuits 38 disposed on the other side of the peripheral circuit area 34 , and a plurality of flexible circuit boards 40 connected to the gate driving circuit 36 and the data driving circuit 38 . Wherein, the substrate 30 is a portable panel, such as a liquid crystal display panel, an organic light emitting diode display panel or other flat display panels of medium or small size. The gate driving circuit 36 and the data driving circuit 38 are respectively connected to the criss-crossing data lines and scanning lines on the substrate 30 to control the X-axis and Y-axis signals of the substrate 30 .

Each flexible circuit board 40 includes a plurality of wires connected to each corresponding gate drive circuit 36 and/or data drive circuit 38, because the length of the flexible circuit board 40 does not need to follow the length of the drive circuits 36, 38. The number or the size of the substrate 30 can be adjusted accordingly. Compared with the known single-chip strip type flexible circuit board, the length can be greatly shortened. Therefore, when the flexible circuit board 40 is bonded to the substrate 30, it can be The known problem of deviation or deviation between the flexible circuit board and the driving circuit of the substrate is effectively avoided. In a preferred embodiment of the present invention, the flexible printed circuit board 40 can be a flexible printed circuit board (flexible printed circuit, FPC), a flexible copper clad substrate (flexible copper cladlaminate, FCCL) or a tape and reel bonding package (tape carrier package, TCP) and other flexible circuit structures. In addition, the other end of the flexible circuit board 40 is connected to a connector 42, such as a printed circuit board or other connecting circuit board, and then connected to the signal via the connector 42 and other flexible circuit boards 44 connected to the connector 42. Control circuits or other electronic components, etc.

Referring to FIG. 3 again, FIG. 3 is a schematic diagram of the back side of a portable panel of the present invention. As shown in Figure 3, in order to avoid the increase of the thickness of the entire panel module due to the use of the connector 42, the present invention further designs the connector 42 to be arranged in an opening 46 on the back of the substrate 30, so that the connection can be absorbed by the opening 46. The thickness of device 42. In practical applications, the opening 46 can be an opening on the packaging shell outside the substrate 30, which can not only accommodate the connector 42, but also be used to absorb the stress applied to the packaging shell or the substrate 30 to avoid packaging Due to the uneven force on the shell, damage such as misalignment and breakage occurs. In a preferred embodiment of the present invention, the packaging shell outside the substrate 30 can be formed of metal material or plastic material, and the design of the position, shape, size and quantity of the opening 46 can depend on the size of the substrate 30 and the connector 42 Or the need to withstand stress and other needs to be changed.

Compared with the known flexible printed circuit board connection structure, the present invention utilizes multiple flexible printed circuit boards to be respectively connected to each corresponding drive circuit, thus avoiding the possible alignment deviation of the known single-chip long flexible printed circuit board question. In addition, the present invention also uses a connector to connect these flexible circuit boards, and the connector is arranged in the opening on the back of the substrate, so the thickness of the connector can be accommodated by the opening on the back of the substrate without increasing the overall size of the substrate. Thickness, which is conducive to the application of thinner substrates

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims (6)

1. soft circuit board connecting structure comprises:

One substrate, this substrate comprise a plurality of drive circuits and at least one opening that is arranged at this substrate back;

One is arranged at the connector in this opening; And

Many flexible circuit boards, it is connected to the described drive circuit of each correspondence respectively, and is connected with described connector.

2. soft circuit board connecting structure as claimed in claim 1 is characterized in that: this connector is a printed circuit board (PCB).

3. soft circuit board connecting structure as claimed in claim 1 is characterized in that: this substrate is a Portable panel.

4. soft circuit board connecting structure as claimed in claim 1 is characterized in that: described these drive circuits comprise data drive circuit.

5. soft circuit board connecting structure as claimed in claim 1 is characterized in that: described these drive circuits comprise gate driver circuit.

6. soft circuit board connecting structure as claimed in claim 1 is characterized in that: this flexible circuit board comprises bendable printed circuit board (PCB), flexible copper foil substrate or winding bond package.

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