CN102446926B - Flexible display panel and assembling method thereof - Google Patents

Abstract

The invention discloses a flexible display panel and an assembly method embodiment. The flexible display panel comprises a display area, at least one connecting area and a plurality of connecting circuits, wherein the display area, the connecting area and the connecting circuits are arranged on the same flexible substrate. The display area has a plurality of pixels. The connecting region is located in at least one extending portion of the non-display region of the flexible display panel. The connecting circuit is used for respectively connecting the pixels of the display area and the connecting area positioned on the extending part. The connecting area is used for connecting to an external circuit to receive the data signal and the driving signal and transmit the data signal and the driving signal to the display area for displaying.

Description

Flexible display panel and assembly method thereof

technical field

The technical field of this case relates to a flexible display panel and its assembly method.

Background technique

With the development trend of electronic products towards thinner and smaller, flexible electronic products such as electronic paper (E-paper) and flexible display (flexible display) are currently being actively developed, and their soft characteristics can achieve a wider display field of application.

In the current display technology, the bonding method between the panel and the external Printed Circuit Board (PCB) is through such as Tape Automated Bonding (TAB), Glass Chip (Chip on Glass, COG) and Chip on Film (COF) and other technologies are connected by anisotropic conductive film (ACF) through high temperature bonding (bonding). Please refer to FIG. 1 , which is a schematic diagram showing the structure of bonding panels and external circuits by using technologies such as tape automated bonding (TAB) or chip-on-film (COF). The display panel 100 includes a display area 110 and a non-display area 120 . The connection between the display panel 100 and the external PCB board 140 is connected by, for example, a chip-on-film (COF) unit 130, so that the circuit 150 on the display panel 100 is, for example, a data line (data line) for providing pixel signals. line) or scan line (scan line), can be connected to the circuit of the external external PCB board 140 through the chip-on-film (COF) unit 130 .

In another display technology, a panel with a driver IC is proposed, such as the system integration (System on Panel, SOP) technology using a built-in driver circuit in the panel, or the driver IC chip (driver IC) IC chip) bonded to the panel (Chip on Panel, COP) technology. Please refer to FIG. 2 , which is a structural schematic diagram showing a panel connected to an external PCB board using a chip-on-panel (COP) technology. The display panel 200 includes a display area 210 and a non-display area 220 . The connection between the display panel 200 and the external PCB 240 is, for example, connected by a flexible printed circuit (FPC) 230 . In the non-display area 220 of the display panel 200, the driver IC 260 is configured by die bonding technology, and the circuit 250 that provides a signal (Signal) or power (Power) is used, for example, to connect to the External PCB board 240 .

In the above architectures, there are similar problems, that is, because at least two substrates are used and connected by bonding (Bonding), in addition to the cumbersome and time-consuming process, once the panel assembly is completed, there is no way to Or it is not easy to remove the panel.

Contents of the invention

A flexible display panel embodiment is disclosed, including: a display area with a plurality of pixels; at least one connection area for electrically connecting to an external circuit; and a plurality of connection lines, wherein the display area, the connection The area and the plurality of connection lines are arranged on the same flexible substrate, the connection area is located in an extension of a non-display area, and the connection lines are used to electrically connect the display area and the connection area respectively to receive data signals and drive signal, and sent to the display area for display.

In another embodiment, a method for assembling a flexible display panel is disclosed, including providing a flexible display panel with a display area, a signal control area, a connection area, and a plurality of connection lines, wherein the display The region, the signal control region, the connection region and the connection circuit configuration are located on a first surface of the same flexible substrate. The flexible substrate includes a first side non-display area and a second side non-display area, wherein the first side non-display area and the second side non-display area are located at two adjacent sides of the display area. The connection circuit includes a first side connection circuit and a second side connection circuit for respectively connecting pixels in the display area, wherein the connection area is connected to an external circuit. An extension part is formed on the non-display area on the first side, wherein one end of the extension part is connected to the main body of the flexible substrate, and the other end is a connection area. The first side non-display area and the second side non-display area are folded along the two sides of the display area to be close to a second surface of the flexible substrate, wherein the second surface is the opposite side of the first surface.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Figure 1 is a schematic diagram showing the structure of bonding panels and external circuits using technologies such as tape automated bonding (TAB) or chip-on-film (COF).

FIG. 2 is a schematic diagram showing a panel connected to an external circuit PCB using a system-on-package (SOP) or chip-on-panel (COP) technology with a built-in driver circuit on the panel.

3A-3D are schematic diagrams showing different implementation examples of the flexible display panel.

FIG. 4 is a schematic diagram showing another embodiment of a flexible display panel.

FIG. 5 is a schematic diagram illustrating an implementation example of a flexible display panel.

6A-6B are schematic diagrams illustrating an example of an assembly implementation of a flexible display panel.

FIG. 6C is a schematic diagram showing another embodiment of a flexible display panel.

7A-7B are schematic diagrams illustrating another embodiment of assembly of a flexible display panel.

FIG. 7C is a schematic diagram showing another embodiment of a flexible display panel.

Among them, reference signs:

100: display panel

110: display area

120: non-display area

130: Chip-on-Film (COF) unit

140: PCB board

150: circuit

200: display panel

210: display area

220: non-display area

230: Flexible printed circuit board (FPC)

240: PCB board

250: circuit

260: drive circuit

300: flexible substrate

310: display area

320: non-display area

322: extension

326: Connection area

326a, 326b: connection area

330 and 332: signal control area

340 and 342: connecting lines

400: flexible substrate

410: display area

420: non-display area

422: Extension

426: Connection area

430, 432: signal control area

440, 442: connecting lines

500: flexible substrate

510: display area

520: non-display area

522: Extension

524: Slit

526: Connection area

530, 532, 534 and 536: signal control area

540, 542, 544, and 546: connecting lines

600: flexible substrate

610: display area

620: non-display area

621: Non-display area on the first side

623: Second side non-display area

624: Extension

625: corner space

626: Slit

628: Connection Area

630, 632: signal control area

640A, 640B and 642: Connection lines

650: Link pad structure

652: insulation layer

654: Conductive Bridge

656: Anisotropic Conductive Film (ACF)

660: Printed Circuit Board (PCB)

662: connection port

700: flexible substrate

710: display area

720: non-display area

720A: First side non-display area

720B: second side non-display area

720C: third side non-display area

720D: Non-display area on the fourth side

722: Extension

724: Slit

726: Connection area

730, 732, 734 and 736: signal control area

740A, 740B, 742, 744B, 744C and 746A, 746B, 746D: Connection lines

750A, 750B and 750C: Bonding pad structure

760: Printed Circuit Board (PCB)

762: Connection Port

Detailed ways

An embodiment provides a flexible display panel, including a display area, a connection area and multiple connection lines, wherein the display area, the connection area and the multiple connection lines are arranged on the same flexible substrate. The display area has a plurality of pixels. The connection area is located at an extension of the non-display area of the flexible display panel. The connection lines are used to respectively connect the pixels in the display area and the connection area located in the extension part. The connection area is used to connect to an external circuit such as a printed circuit board (PCB) to receive data signals and drive signals and transmit them to the display area for display.

Another embodiment provides a flexible display panel, including a display area, a connection area, a signal control area and multiple connection lines, wherein the display area, signal control area, connection area and multiple connection lines are arranged in the same on a soft substrate. The display area has a plurality of pixels. The connection area is located at an extension of the non-display area of the flexible display panel. The signal control area is located on at least one side of the periphery of the display area, and receives data signals and control signals from external circuits through the plurality of connection lines and the connection area, so as to control and drive the display of pixels in the display area.

In an example embodiment, the above-mentioned connection method can be connected to the external circuit such as a printed circuit board (PCB) in a plug-in manner, that is, the connection between the flexible display panel and the external printed circuit board is, for example, a connector (connector). ) structure. In another example, solder, conductive glue or anisotropic conductive film (ACF) can also be used to connect via high temperature bonding. The above-mentioned flexible display panel is only connected to the external printed circuit board by using this connection area.

In one embodiment, the above-mentioned flexible substrate has a slit, forming a strip-shaped flexible extension on the side of the non-display area, and one end of the strip-shaped extension is connected to the flexible substrate The main body, while the other end is a connection area, which can be used to connect to an external printed circuit board. The shape, size or bending position of the elongated extension can be determined according to the design requirements of the flexible display panel module.

In another embodiment, an assembly method of a flexible display panel is provided. In the assembly method, firstly, a flexible display panel is provided, which has a display area, a connection area and multiple connection lines, wherein the display area, the connection area and the multiple connection lines are arranged on the same flexible substrate on the first surface. The flexible substrate includes a first side non-display area and a second side non-display area, wherein the first side non-display area and the second side non-display area are located at two adjacent sides of the display area. The connection circuit includes a first side connection circuit and a second side connection circuit for respectively connecting the pixels of the display area and the connection area.

Then a slit (Slit) is formed on the non-display area on the first side to form a strip-shaped flexible extension, and one end of the strip-shaped extension is connected to the main body of the flexible substrate, and the other end is connection area. The connecting lines on the first side and the connecting lines on the second side converge into this connecting area. The shape, size or bending position of the strip-shaped connection area can be determined according to the design requirements of the flexible display panel module.

Then, the first side non-display area and the second side non-display area are folded along the two sides of the display area to be close to a second surface of the flexible substrate, and the second surface is the opposite of the above-mentioned first surface noodle.

Next, the connection area is connected to an external printed circuit board (PCB) to receive data signals and drive signals and transmit them to the display area for display. And one side of the flexible display panel substantially reserves the display area and/or a small frame.

In another embodiment, an assembly method of a flexible display panel is provided. In the assembly method, firstly, a flexible display panel is provided, which has a display area, a connection area and multiple connection lines, wherein the display area, the connection area and the multiple connection lines are arranged on the same flexible substrate on the first surface. The flexible substrate includes a first side non-display area and a second side non-display area, wherein the first side non-display area and the second side non-display area are located at two adjacent sides of the display area. The first side non-display area and the second side non-display area extend along two sides of the display area, and there is a separation space between them. The connection lines are respectively located in the non-display area on the first side and the non-display area on the second side, and have a connection line on the first side and a connection line on the second side for respectively connecting the pixels of the display area and the connection area.

Then a slit (Slit) is formed on the non-display area on the first side to form a strip-shaped flexible extension, and one end of the strip-shaped extension is connected to the main body of the flexible substrate, and the other end is connection area. The shape, size or bending position of the strip-shaped connection area can be determined according to the design requirements of the flexible display panel module.

Then, the first side non-display area and the second side non-display area are folded along the two sides of the display area to be close to a second surface of the flexible substrate, and the second surface is the opposite of the above-mentioned first surface noodle.

connecting pads are provided for aligning the second side connection lines on the second side non-display area with the first side connection lines connected to part of the first side non-display area so that the second side connection lines pass through the part of the first side The side connection lines are collected into this connection area.

Next, the connection area is connected to an external printed circuit board (PCB) to receive data signals and drive signals and transmit them to the display area for display. And one side of the flexible display panel substantially reserves the display area and/or a small frame.

In another embodiment, an assembly method of a flexible display panel is provided. In the assembly method, firstly, a flexible display panel is provided, which has a display area, a signal control area, a connection area and multiple connection lines, wherein the display area, signal control area, connection area and multiple The connecting circuit configuration is located on a first surface of the same flexible substrate. The flexible substrate includes a first side non-display area and a second side non-display area, wherein the first side non-display area and the second side non-display area are located at two adjacent sides of the display area. The first side non-display area and the second side non-display area extend along two sides of the display area, and there is a separation space between them. The first side non-display area and the second side non-display area respectively have a first signal control area and a second signal control area. The connection lines are also respectively located in the non-display area on the first side and the non-display area on the second side. There is a connection line on the first side and a connection line on the second side, so that the connection area is connected to the first signal control area and the second side respectively. The signal control area is electrically connected.

Then a slit (Slit) is formed on the non-display area on the first side to form a strip-shaped flexible extension, and one end of the strip-shaped extension is connected to the main body of the flexible substrate, and the other end is connection area. The shape, size or bending position of the strip-shaped connection area can be determined according to the design requirements of the flexible display panel module.

Then, the first side non-display area and the second side non-display area are folded along the two sides of the display area to be close to a second surface of the flexible substrate, and the second surface is the opposite of the above-mentioned first surface noodle.

providing bonding pads for the second side connection lines on the second side non-display area to align with the first side connection lines connected to the portion of the first side non-display area so that the second side connection lines pass through the portion of the first side Connected lines are collected in this connection area.

Next, connect the connection area to an external printed circuit board (PCB) to receive data signals and control signals, and transmit them to the first signal control area and the second signal control area, so as to control the display in the display area.

In an example embodiment, the above-mentioned connection method can be connected to the external printed circuit board in a plug-in manner, that is, the connection between the flexible display panel and the external printed circuit board adopts a structure such as a connector. In another example, solder, conductive glue or anisotropic conductive film (ACF) can also be used to connect via high temperature bonding. The above-mentioned flexible display panel is only connected to the external printed circuit board by using this connection area.

In other embodiments, the above-mentioned flexible display panel may include a plurality of connecting areas corresponding to different positions connected to the external circuit board.

The above-mentioned flexible display panel and its assembly method are illustrated with the following implementation examples and diagrams, but are not limited thereto.

Please refer to FIG. 3A , which is a schematic diagram illustrating an implementation example of a flexible display panel. The flexible display panel is formed on a flexible substrate 300 and includes a display area 310 and a non-display area 320 . In one or more embodiments, the flexible substrate 300 can be polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene isophthalate (polyethylenenaphthalate, PEN), polyimide film (polyimide; PI) and other polymer materials, or aluminum, copper, silver, stainless steel and other metal materials. There are multiple pixel arrangements on the display area 310 . The non-display area 320 of the flexible display panel further includes a plurality of signal control areas 330 and 332 , a connection area 326 and a plurality of connection lines 340 and 342 . In this embodiment example, the non-display area 320 has a slit (Slit) 324, and a strip-shaped flexible extension 322 is formed on the side of the non-display area 320, and the strip-shaped extension 322 One end of is connected to the main body of the flexible substrate 300, and the length of the connecting part is length D as shown in the figure. The shape, size or bending position of the elongated extension part 322 can be determined according to the design requirements of the flexible display panel module. The other end of the elongated extension 322 is connected to the connection area 326, which can be used to connect to an external circuit such as a printed circuit board (PCB). The external circuit board (PCB) is provided with image data processing, timing control and power conversion, etc. circuit.

The signal control areas 330 and 332 have corresponding connection lines 340 and 342 respectively. These connecting lines 340 and 342 include circuits for providing signals (Signal) or power (Power), respectively electrically connecting the drive circuits in the signal control areas 330 and 332 to the pixel units in the display area 310 and connecting To the connection area 326, the driving circuits in the signal control areas 330 and 332 can receive data signals and control signals from an external printed circuit board (PCB), and control and drive the pixels in the display area 310 to display according to these data.

In this embodiment, the flexible substrate 300 includes one connection area 326 , and in one or more other embodiments, the flexible substrate 300 may also include multiple connection areas. The connecting area 326 can be connected to the external printed circuit board (PCB) in a plug-in manner, that is, the connection between the flexible display panel and the external printed circuit board adopts a structure such as a connector. In another example, solder, conductive glue, or anisotropic conductive film (ACF) and other joints and materials with conductive properties can also be used to connect via bonding. The above-mentioned flexible display panel only utilizes the connection area 326 to connect to the external printed circuit board. In different embodiments, the above-mentioned flexible display panel may include two connection areas, for example, one connection area corresponds to the scan lines, and the other connection area corresponds to the data lines, which are respectively connected to different positions of the external circuit board.

The driving circuits in the signal control areas 330 and 332 include, for example, a data driving circuit (Data Driver IC) and a scanning driver (Scan Driver IC). The data driving circuit, such as a source driver IC, is used as an input for arranging data, which is characterized by high frequency and can drive pixels for display. A scan driver such as a gate driver (Gate Driver IC) is used to control data input. The driving circuits in the signal control areas 330 and 332 can adopt the system integration (System on Panel, SOP) technology built in the panel, or the technology of bonding the grain to the panel (Chip on Panel, COP) can be configured on the panel. .

The pixel unit on the display area 310 can utilize, for example, an organic electroluminescent display layer (organic light emitting diode, OLED), a liquid crystal display layer (liquid crystal display, LCD), a cholesteric liquid crystal display layer (cholesteric liquid crystal display, ChLCD), electrophoretic Electrophoretic display (EPD), electrowetting display (EWD), quick response liquid-powder display (QR-LPD), or other various features that can be configured in soft The display unit of the substrate is composed. The driving method can be driven by passive matrix (passive matrix, PM), active matrix (active matrix, AM) or segmented.

Please refer to FIG. 3B , which is a schematic diagram illustrating that the flexible display panel shown in FIG. 3A has a bendable or movable connection area. The shape, size or bending position of the above-mentioned elongated extension part 322 can be determined according to the design requirements of the flexible display panel module. The other end of the elongated extension 322 is connected to a connection area 326 for connecting to an external printed circuit board.

Please refer to FIG. 3C , which is a schematic diagram illustrating an implementation example of another flexible display panel. The structure of the flexible display panel is similar to that of FIG. 3A , and the same components or configuration areas are denoted by the same reference numerals, which will not be repeated here. The difference from FIG. 3A is that the flexible display panel does not necessarily need a signal control area. That is to say, the driving circuit, such as a data driving circuit and a scanning driver, directly connects the pixel units in the display area 310 to the connecting area 326 through the connecting lines 340 and 342, and directly receives data signals and signals from an external printed circuit board (PCB). The control signal is used to control and drive the pixels in the display area 310 to display.

Please refer to FIG. 3D , which is a schematic diagram illustrating another implementation example of a flexible display panel. The structure of the flexible display panel is similar to that in FIG. 3C , and the same components or configuration areas are denoted by the same reference numerals, which will not be repeated here. The difference from FIG. 3C is that slits (slits) 324a and 324b are provided corresponding to the connection lines 342 and 340 respectively, and data signals and control signals are received from an external printed circuit board (PCB) through the connection area 326a and the connection area 326b. , and drive the pixels in the display area 310 to display accordingly. The bonding method between the connection regions 326 a and 326 b and the external printed circuit board (PCB) in this embodiment is also preferably bonding.

FIG. 4 is a schematic diagram illustrating the configuration of another flexible display panel. The elongated extensions of different shapes are designed. Schematic diagram with bendable or movable connection zones. The flexible display panel is formed on a flexible substrate 400 and includes a display area 410 and a non-display area 420 . There are multiple pixel arrangements on the display area 410 . The non-display area 420 of the flexible display panel further includes a plurality of signal control areas 430 and 432 , a connection area 426 and a plurality of connection lines 440 , 442 . Therefore, a long bendable extension 422 is formed on the side of the non-display area 420 , and one end of the long extension 422 is connected to the main body of the flexible substrate 400 . The other end of the elongated extension 422 is connected to a connecting area 426 for connecting to an external printed circuit board.

With the enlargement of the size of the display panel and the improvement of the display quality requirements, there are more and more requirements on the driving capability and the operating frequency of the driving circuit. Therefore, it is proposed to configure different driving circuits on the three or four sides of the display panel to increase the driving capability and operating frequency or meet other design requirements. For example, the upper and lower sides are equipped with data driver ICs, while the left and right sides are equipped with scan drivers. For such a design example, please refer to Figure 5.

Please refer to FIG. 5 , which is a schematic diagram illustrating an implementation example of a flexible display panel. The flexible display panel is formed on a flexible substrate 500 and includes a display area 510 and a non-display area 520 . There are multiple pixel arrangements on the display area 510 . The non-display area 520 of the flexible display panel further includes a plurality of signal control areas (such as 530, 532, 534 and 536 in the figure), a connection area 526 and a plurality of connection lines (such as 540, 542, 544 and 546). In this embodiment example, the non-display area 520 has a slit (Slit) 524, and a strip-shaped flexible extension 522 is formed on the side of the non-display area 520, and the strip-shaped extension 522 One end is connected to the main body of the flexible substrate 500 . The shape, size or bending position of the elongated extension part 522 can be determined according to the design requirements of the flexible display panel module. The other end of the elongated extension 522 is connected to a connection area 526 for connecting to an external printed circuit board.

The signal control areas 530, 532, 534 and 536 have corresponding connection lines 540, 542, 544 and 546 respectively, and these connection lines 540, 542, 544 and 546 connect the driving circuits in the signal control areas 530, 532, 534 and 536 respectively. Electrically connected to the pixel units in the display area 510 and connected to the connection area 526, so that the driving circuits in the signal control areas 530, 532, 534 and 536 can receive data signals, control signals and power from an external printed circuit board (PCB). , and according to these data, control and drive the pixels in the display area 510 to display.

In an example embodiment, the connection between the above-mentioned connection area 526 and the external printed circuit board (PCB) can adopt a plug-in method, that is, the connection between the flexible display panel and the external printed circuit board is, for example, a connector. architecture. In another example, solder, conductive glue, or anisotropic conductive film (ACF) and other bonding materials with conductive properties may also be used to connect via bonding. The above-mentioned flexible display panel only utilizes the connection area 526 to connect to the external printed circuit board. In different embodiments, the above-mentioned flexible display panel may include two or more connection areas, which are respectively connected to different positions of the external circuit board.

The driving circuits in the signal control areas 530, 532, 534 and 536 include, for example, a data driving circuit (DataDriver IC) and a scanning driver (Scan Driver IC). The driving circuits in the signal control areas 530, 532, 534 and 536 can adopt the system integration (System on Panel, SOP) technology built in the panel, or the technology of bonding the die to the panel (Chip on Panel, COP) Configured on the panel.

The pixel units on the display area 510 can use, for example, an organic electroluminescent display layer (OLED), a liquid crystal display layer (LCD), a cholesteric liquid crystal display layer (ChLCD), an electrophoretic display layer (EPD), an electrowetting display layer (EWD) ), quick response liquid powder display layer (QR-LPD), or other various display units that can be configured on flexible substrates.

A method for assembling is provided for the flexible display panel shown in FIG. 5 . The non-display area 520 around the display area 510 can be folded back along the boundary of the display area 510 to be close to the back of the flexible substrate 500 . Next, the connection area 526 is connected to a printed circuit board (PCB) to receive data signals and drive signals and transmit them to the display area for display. In one embodiment, the printed circuit board (PCB) can be attached to the back of the flexible display panel to form a display panel module. In essence, only the display area and/or a small frame are reserved on one side of the flexible display panel. Such a frameless or narrow frame design can effectively expand the display area of the overall display, or increase the shape and aesthetics of the display.

Please refer to FIG. 6A , which is a schematic diagram illustrating an example of assembly of a flexible display panel and modules. The flexible display panel is formed on a flexible substrate 600 and includes a display area 610 and a non-display area 620 . There are multiple pixel arrangements on the display area 610 . The non-display area 620 of the flexible display panel further includes a plurality of signal control areas 630 and 632 , a connection area 628 and a plurality of connection lines 640A, 640B and 642 . In this embodiment, the non-display area 620 includes a first side non-display area 621 and a second side non-display area 623 .

The first side non-display area 621 and the second side non-display area 623 are located on two adjacent sides of the display area 610 , and there is a corner separation space 625 between them. Such a configuration is mainly for the purpose that when the first side non-display area 621 and the second side non-display area 623 are folded back along the boundary of the display area 610, the corners do not need to bend and overlap and can be more smoothly attached to the flexible substrate. The back of the 600.

There is a slit (Slit) 626 on the second side non-display area 623, and a strip-shaped flexible extension 624 is formed on the side of the second-side non-display area 623, and the strip-shaped extension 624 One end of is connected to the main body of the second side non-display area 623 . The shape, size or bending position of the elongated extension part 624 can be determined according to the design requirements of the flexible display panel module. The other end of the elongated extension 624 is connected to a connection area 628 for connecting to an external printed circuit board.

With such a layout structure, the signal control area 632 on the non-display area 623 on the second side can be electrically connected to the connection area 628 via the connection line 642 . However, since the first side non-display area 621 and the second side non-display area 623 are separated by a corner separation space 625, the signal control area 630 of the first side non-display area 621 cannot be electrically connected via the connection line 640A. to connection area 628. Therefore, a connection line 640B needs to be added in the non-display area 623 on the second side. And when the first side non-display area 621 and the second side non-display area 623 are folded back along the boundary of the display area 610 and close to the back of the flexible substrate 600, the connection circuit 640A can be connected to the connection circuit 640A through an electrical connection structure. The line 640B is electrically connected.

The above-mentioned electrical connection structure is, for example, a connection pad structure, and for a detailed structural diagram, please refer to FIG. 6B . FIG. 6B shows a schematic diagram of an embodiment of the connection pad structure electrically connecting internal circuits when the first side non-display area and the second side non-display area are folded back along the boundary of the display area and close to the back of the flexible substrate. As shown in the figure, in this embodiment, the connection pad structure 650 includes a stack of an insulating layer 652 , a conductive bridge (ConductiveBridge) 654 and an anisotropic conductive film (ACF) 656 . The connection circuit 640A is electrically connected to the connection circuit 640B by pressing an anisotropic conductive film (ACF) 656 . In an embodiment, the connection pad structure 650 may also be connected by soldering.

In another embodiment, a corner separation space is not provided, and the connection circuit 640A and the connection circuit 640B are directly connected to the flexible substrate 600, so that the connection pad structure is not required, but when the first side non-display area 621 and When the non-display area 623 on the second side is folded back along the boundary of the display area 610 and close to the back of the flexible substrate 600 , the connection lines at the corners need to be insulated and strengthened to avoid short circuits at the folds.

The connection lines 640A and 640B corresponding to the signal control area 630 , and the connection line corresponding to the signal control area 632 is the connection line 642 . Using these connection lines 640A, 640B, and 642, the driving circuits in the signal control areas 630 and 632 are electrically connected to the pixel units in the display area 610 and to the connection area 628, and the connection area 628 is electrically connected. It is connected to a connection port (Connection Port) 662 of a printed circuit board (PCB) 660 . Such a structure enables the driving circuits in the signal control areas 630 and 632 to receive data signals and control signals from the printed circuit board (PCB) 660 , and control and drive the pixels in the display area 610 to display according to these data.

In one embodiment, the electrical connection between the connection area 628 and the connection port 662 of the printed circuit board (PCB) 660 can be plugged in, that is, the connection between the flexible display panel and the external printed circuit board is, for example, Connector architecture. In another example, solder, conductive glue, or anisotropic conductive film (ACF) and other bonding materials with conductive properties may also be used to connect via bonding. The above-mentioned flexible display panel is only connected to a printed circuit board (PCB) 660 by using the connection area 628 .

The driving circuits in the signal control areas 630 and 632 include, for example, a data driving circuit (Data Driver IC) and a scanning driver (Scan Driver IC). The data driving circuit, such as a source driver IC, is used as an input for arranging data, which is characterized by high frequency and can drive pixels for display. A scan driver such as a gate driver (Gate Driver IC) is used to control data input. The driving circuits in the signal control areas 630 and 632 can adopt the system integration (System on Panel, SOP) technology built into the panel, or the technology of bonding the die to the panel (Chip on Panel, COP) can be configured on the panel. .

The pixel units on the display area 610 can use, for example, an organic electroluminescent display layer (OLED), a liquid crystal display layer (LCD), a cholesteric liquid crystal display layer (ChLCD), an electrophoretic display layer (EPD), an electrowetting display layer (EWD) ), quick response liquid powder display layer (QR-LPD), or other various display units that can be configured on flexible substrates.

Please refer to FIG. 6C , which is a schematic diagram illustrating another implementation example of a flexible display panel. The structure of the flexible display panel is similar to that of FIG. 6A , and the same components or configuration areas are denoted by the same reference numerals, which will not be repeated here. The difference from FIG. 6A is that the flexible display panel does not have a signal control area, that is, a driving circuit such as a data driving circuit and a scanning driver, but directly connects the pixel units in the display area 610 through connecting lines 640A, 640B, and 642. to the connection area 628, and directly receive data signals and control signals from an external printed circuit board (PCB), and control and drive the pixels in the display area 610 to display accordingly.

In order to meet the requirements, different driving circuits are arranged on the four sides of the display panel to increase the driving capability and operating frequency. For example, the upper and lower sides are equipped with data driver ICs, while the left and right sides are equipped with scan drivers. In order to have the design concept of the borderless display panel as shown in FIG. 6A , an implementation example is proposed as shown in FIG. 7A .

Please refer to FIG. 7A , which is a schematic diagram illustrating an implementation example of a flexible display panel. The flexible display panel is formed on a flexible substrate 700 and includes a display area 710 and a non-display area 720 . There are multiple pixel arrangements on the display area 710 . The non-display area 720 of the flexible substrate 700 further includes a plurality of signal control areas (such as 730, 732, 734 and 736 in the figure), a connection area 726 and a plurality of connection lines (such as 740A, 740B, 742, 744B, 744C and 746A, 746B, 746D).

The non-display area 720 includes non-display areas located on four sides of the display area 710, including a first side non-display area 720A, a second side non-display area 720B, a third side non-display area 720C and a fourth side non-display area 720D. . Each adjacent side has a corner divider. Such a configuration is mainly for the purpose that when the side non-display areas are folded back along the boundary of the display area 710 , the corners do not need to bend or overlap and can be more smoothly attached to the back of the flexible substrate 700 .

In this embodiment, the second side non-display area 720B has a slit (Slit) 724, and a long strip-shaped flexible extension 722 is formed on the side of the second side non-display area 720B, and the length One end of the strip-shaped extension 722 is connected to the main body of the flexible substrate 700 . The shape, size or bending position of the elongated extension portion 722 can be determined according to the design requirements of the flexible display panel module. The other end of the elongated extension 722 is connected to a connection area 726 for connecting to an external printed circuit board.

The signal control area 732 on the second non-display area 720B can be electrically connected to the connection area 726 via the connection line 742 . However, because there are corner separation spaces between the first side non-display area 721, the third side non-display area 720C, the fourth side non-display area 720D, and the second side non-display area 720B for electrical isolation, therefore, in the circuit layout must be adjusted. As shown in the figure, the connection lines in the non-display area 720D on the fourth side are electrically connected to the connection area 726 through the connection lines 746D, 746A, and 746B in sequence. In addition, the first side non-display area 720A is electrically connected to the connection area 726 through the connection lines 740A and 740B in sequence. The third side non-display area 720C is electrically connected to the connection area 726 through the connection lines 744C and 744B in sequence.

The above-mentioned electrical connection structure is, for example, a connection pad structure, and for a detailed structural diagram, please refer to FIG. 7B . FIG. 7B shows a schematic diagram of an embodiment of the connection pads electrically connected to internal circuits when the first to fourth non-display areas are folded back along the boundary of the display area and close to the back of the flexible substrate. As shown in the figure, in this embodiment, the structure of the connection pad structures 750A, 750B and 750C is the same as that of FIG. become. An anisotropic conductive film (ACF) is used to form the electrical connection of the connection lines between the non-display areas on different sides. The connection area 726 is electrically connected to a connection port (Connection Port) 762 of a printed circuit board (PCB) 760 . Such a structure enables the driving circuits in the signal control areas 730 , 732 , 734 and 736 to receive data signals and control signals from the printed circuit board (PCB) 760 , and control and drive the pixels in the display area 710 to display according to these data.

In another embodiment, a corner separation space is not provided, and the connection circuit 740A and the connection circuit 740B are directly connected to the flexible substrate 700; the connection circuit 744B and the connection circuit 744C are directly connected to the flexible substrate 700; The circuit 746A, the connection circuit 746B and the connection circuit 746D are directly connected to the flexible substrate 700 . In this way, the connection pad structure is not needed, but when the first side non-display area 720A, the second side non-display area 720B, the third side non-display area 720C and the fourth side non-display area 720D are turned backward along the boundary of the display area 710 When it is folded close to the back of the flexible substrate 700 , the connection lines at the corners need to be insulated and strengthened to avoid short circuits at the folds.

In one embodiment, the electrical connection between the connection area 726 and the connection port 762 of the printed circuit board (PCB) 760 can be plugged in, that is, the connection between the flexible display panel and the external printed circuit board is, for example, Connector architecture. In another example, solder, conductive glue, or anisotropic conductive film (ACF) and other bonding materials with conductive properties may also be used to connect via bonding. The above-mentioned flexible display panel is only connected to a printed circuit board (PCB) 760 by using the connection area 726 .

The driving circuits in the signal control areas 730, 732, 734 and 736 include, for example, a data driving circuit (Data Driver IC) and a scanning driver (Scan Driver IC). The data driving circuit, such as a source driver IC, is used as an input for arranging data, and is characterized by high frequency and capable of driving pixel images. A scan driver such as a gate driver (Gate Driver IC) is used to control data input. The driving circuits in the signal control areas 730, 732, 734, and 736 can be configured in a panel-built system integration (System on Panel, SOP) or a technology of bonding crystal grains to a panel (Chip on Panel, COP). panel.

The pixel units on the display area 710 can use, for example, an organic electroluminescent display layer (OLED), a liquid crystal display layer (LCD), a cholesteric liquid crystal display layer (ChLCD), an electrophoretic display layer (EPD), an electrowetting display layer (EWD) ), quick response liquid powder display layer (QR-LPD), or other various display units that can be configured on flexible substrates.

Please refer to FIG. 7C , which is a schematic diagram illustrating another implementation example of a flexible display panel. The structure of the flexible display panel is similar to that of FIG. 7A , and the same components or configuration areas are denoted by the same reference numerals, which will not be repeated here. The difference from FIG. 7A is that the flexible display panel does not necessarily need a signal control area. That is to say, the driving circuit, such as a data driving circuit and a scanning driver, directly connects the pixel units in the display area 710 to the connecting area 726 through the connecting lines, and directly receives the data signal and the control signal from the printed circuit board (PCB), and According to control and drive the pixels in the display area 710 to display.

Of course, the application can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the application without departing from the spirit and essence of the application, but these Corresponding changes and deformations shall fall within the protection scope of the claims of this application.

Claims (17)

1. A flexible display panel, comprising: a display area with a plurality of pixels; at least one connection area for electrically connecting to an external circuit; multiple connection lines, and at least one signal control area, where The display area, the connection area and the plurality of connection lines are arranged on the same flexible substrate, the connection area is located in an extension of a non-display area, and the connection lines are used to electrically connect the display area and the connection lines respectively. The at least one signal control area is electrically configured between the display area and the connection area through the connecting lines. 2. The flexible display panel according to claim 1, wherein the connection area includes a connector for electrically connecting with the external circuit in a plug-in manner. 3 . The flexible display panel according to claim 1 , wherein the connection area is connected by soldering, conductive glue or anisotropic conductive film through lamination. 4 . 4. The flexible display panel according to claim 1, wherein the display area at least comprises an organic electroluminescent display layer, a liquid crystal display layer, a cholesteric liquid crystal display layer, an electrophoretic display layer, an electrowetting display layer, an electrowetting display layer, and an electrophoretic display layer. One or a combination of the color-induced display layer or the quick-response liquid powder display layer. 5. The flexible display panel according to claim 1, wherein the flexible substrate has a slit, and a long strip-shaped bendable extension is formed on the side of the non-display area, wherein the strip One end of the shaped extension part is connected to the main body of the flexible substrate, and the other end is the connection area. 6. The flexible display panel according to claim 1, characterized in that, in the non-display area, located on both sides around the display area, at least include a first side non-display area and a second side non-display area , which is folded and pasted on the back of the flexible substrate to form a display panel module. 7. The flexible display panel according to claim 6, wherein a corner separation space is formed between the first side non-display area and the second side non-display area, so as to be folded and attached to the flexible display panel. The back of the flexible substrate. 8. The flexible display panel according to claim 7, further comprising at least one connection pad for electrically connecting the connections between the non-display area on the first side and the non-display area on the second side line. 9. The flexible display panel according to claim 1, wherein the signal control area includes at least one driving circuit, which is configured in the panel by adopting the technology of system integration built into the panel or bonding dies to the panel Flexible substrate panel. 10. The flexible display panel according to claim 1, further comprising at least a first signal control circuit and a second signal control circuit, wherein the first signal control circuit is electrically connected through the connecting lines To the display area and a first connection area among the connection areas, the second signal control circuit is electrically connected to the display area and a second connection area among the connection areas through the connection lines, the first A connection area and the second connection area are respectively used to electrically connect to different circuit areas of the external circuit. 11. The flexible display panel according to claim 10, wherein the first connection area and the second connection area respectively have a first connector and a second connector for connecting with the external circuit Plug-in electrical connection. 12 . The flexible display panel according to claim 10 , wherein the first connection area and the second connection area are respectively connected to the external circuit by using solder, conductive glue or anisotropic conductive film through lamination. 13. The flexible display panel according to claim 10, wherein the first connection area or the second connection area can be electrically connected to the external circuit by plugging or pressing. 1. Make an electrical connection. 14. A method for assembling a flexible display panel, comprising: A flexible display panel is provided, which has a display area, a connection area, and a plurality of connection lines, wherein the display area, the connection area, and the connection lines are arranged on a first surface of the same flexible substrate, and the flexible The substrate includes a first-side non-display area and a second-side non-display area, the first-side non-display area and the second-side non-display area are located on two adjacent sides of the display area, and the connecting lines include a a first-side connection circuit and a second-side connection circuit for respectively connecting pixels in the display area, wherein the connection area is connected to an external circuit; An extension part is formed on the first side non-display area, one end of the extension part is connected to the main body of the flexible substrate, and the other end is the connection area; and The first side non-display area and the second side non-display area are folded along the two sides of the display area to be close to a second surface of the flexible substrate, and the second surface is opposite to the first surface noodle. 15. The method for assembling the flexible display panel according to claim 14, wherein a corner partition space is formed between the first side non-display area and the second side non-display area to facilitate folding and pasting attached to the back of the flexible substrate. 16. The method for assembling the flexible display panel according to claim 15, wherein after the non-display area on the first side and the second side are folded close to the second surface of the flexible substrate, further The method includes using a connection pad to electrically connect the connection lines located at the first side non-display area and the second side non-display area. 17 . The method for assembling the flexible display panel according to claim 16 , wherein the connecting pads are connected by anisotropic conductive film, or connected by solder or conductive glue. 18 .