CN113745251A - Display panel and mobile terminal - Google Patents
Display panel and mobile terminal Download PDFInfo
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- CN113745251A CN113745251A CN202110996738.8A CN202110996738A CN113745251A CN 113745251 A CN113745251 A CN 113745251A CN 202110996738 A CN202110996738 A CN 202110996738A CN 113745251 A CN113745251 A CN 113745251A
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- 239000000758 substrate Substances 0.000 claims abstract description 25
- 238000013461 design Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 5
- 239000002519 antifouling agent Substances 0.000 description 3
- 239000006059 cover glass Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/441—Interconnections, e.g. scanning lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
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- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to a display panel and a mobile terminal, wherein the display panel is provided with a bridging part in a fan-out area of a display substrate, redundant wires at adjacent sides of two adjacent chip on film chips form bridging through the bridging part, one end of the redundant wires far away from the bridging part is connected with a circuit board, so that part of signals in one circuit board are transmitted to the other circuit board through the redundant wires, the bridging signals between the two adjacent circuit boards are not required to be transmitted through a switching connector and a flexible circuit board, the number of PIN PINs of the switching connector can be reduced, the size of the flexible circuit board can be reduced, and the design cost is reduced. Or when the size of the flexible circuit board is not changed, the width of important signal routing is widened, and the signal attenuation is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a mobile terminal.
Background
At present, a Driver IC (chip on film) of a display panel is usually bonded on the display panel in a form of a COF (chip on film) to form a chip on film, and for a large-sized display panel with a GOA (Gate Driver on Array, Array substrate line driving technology), a Driver architecture usually adopts a Driver board (C/Broad) + a strip board (X/Broad) architecture design, however, as the size becomes larger, a PCB (printed circuit board) process of the strip board cannot meet a length requirement, and the strip board needs to be designed in sections and connected with a communication signal through a transfer connector bridge.
The bridging mode of the adaptor connector is that the adaptor connector is bridged by a Flexible Printed Circuit (FPC), signals bridged by the FPC are more and more along with the higher resolution of a display panel, but the signals are limited by the size of the FPC, and the signal routing width can only be reduced to meet the design requirement, so the defect is that the transmission signal attenuation is serious when the routing width is reduced; or increasing the number of layers of the FPC to ensure the strength of the transmission signal, but increases the design cost.
Disclosure of Invention
The invention aims to provide a display panel and a mobile terminal to solve the problem of attenuation of transmission signals of the existing display panel.
Specifically, the technical scheme adopted by the invention is as follows:
a display panel comprises a display substrate and at least two circuit boards, wherein the display substrate and the at least two circuit boards are arranged along a first direction, the two circuit boards are respectively connected with the display substrate through a chip on film, the chip on film comprises display signal wires arranged along the first direction and redundant wires arranged along the first direction and positioned at two sides of the display signal wires, and the first direction is vertical to the second direction; bridge parts are arranged on the display substrate between the two chip on film chips along a second direction, redundant wires on adjacent sides of the two chip on film chips are connected through the bridge parts, and one ends, far away from the bridge parts, of the redundant wires connected with the bridge parts are connected with the corresponding circuit boards.
Optionally, the display substrate includes the display area and centers on the non-display area in display area, the non-display area includes the fan-out area, the signal output part of cover glass chip passes through show that signal routing is connected to corresponding the display substrate in fan-out area, the signal input part of cover glass chip passes through show that signal routing is connected to the circuit board, the bridge section set up in the fan-out area, the bridge section include the main part with set up in the link at main part both ends, two redundant routing of cover glass chip adjacent side extends to along the first direction respectively fan-out area and with corresponding the link is connected.
Optionally, one end of the connecting end, which is far away from the main body, extends to the outer side of one end of the display signal wire of the adjacent chip on film chip, which is close to the other chip on film chip.
Optionally, each of the connection ends includes at least one pin, and the number of the pins in each of the connection ends is greater than or equal to the number of the redundant traces corresponding to the pins.
Optionally, the distance between the two circuit boards is smaller than the length of the bridging portion.
Optionally, one end of the chip on film far away from the redundant wiring on one side of the other chip on film is connected with the fan-out region, and the other end is connected with the circuit board.
Optionally, the circuit board includes a windowing area and a routing area sequentially arranged along a first direction, the windowing area is close to the chip on film, and the display signal routing connected to the signal input end of the chip on film extends to the routing area through the windowing area.
Optionally, the wiring areas of the two circuit boards are connected through a flexible circuit board, and adaptor connectors connected with the flexible circuit board are respectively arranged in the wiring areas of the two circuit boards.
In order to achieve the above object, the present invention also provides a mobile terminal including a terminal body and the display panel as described above.
The display panel and the mobile terminal provided by the invention have the beneficial effects that the bridge parts are arranged in the fan-out area of the display substrate, the redundant wires on the adjacent sides of the two adjacent chip on film chips form bridge connection through the bridge parts, and one end of the redundant wires, which is far away from the bridge parts, is connected with the circuit board, so that part of signals in one circuit board are transmitted to the other circuit board through the redundant wires, and the bridge signals between the two adjacent circuit boards are not required to be transmitted through the adaptor connector and the flexible circuit board, so that the number of PIN PINs of the adaptor connector can be reduced, the size of the flexible circuit board can be reduced, and the design cost is reduced. Or when the size of the flexible circuit board is not changed, the width of important signal routing is widened, and the signal attenuation is reduced.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an exemplary embodiment of the present invention.
The parts in the figure are numbered as follows:
100. a display panel, 110, a display substrate, 111, a display area, 112, a non-display area, 113, a fan-out area, 114, a bridge portion, 1141, a main body, 1142a, a first connection end, 1142b, a second connection end, 120a, a first circuit board, 120b, a second circuit board, 121, a windowing area, 122, a routing area, 130a, a first chip on film, 131a, a first driving chip, 132a, a first display signal routing, 133a, a first redundant routing, 130b, a second chip on film, 131b, a second driving chip, 132b, a second display signal routing, 133b, a second redundant routing, 140, a flexible circuit board, 140 ', a first dashed frame, 150a, a first transition connector, 150a ', a second dashed frame, 150b, a second transition connector, 150b ', a second dashed frame;
y, a first direction; x, the second direction.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The display panel is provided with the bridging portion in the fan-out area of the display substrate, the redundant wiring of the adjacent sides of the two adjacent chip on film chips forms bridging through the bridging portion, one end, far away from the bridging portion, of the redundant wiring is connected with the circuit board, so that part of signals in one circuit board are transmitted to the other circuit board through the redundant wiring, the bridging signals between the two adjacent circuit boards are not required to be transmitted through the adaptor connector and the flexible circuit board, the number of PIN PINs of the adaptor connector can be reduced, the size of the flexible circuit board can be reduced, and the design cost is reduced. Or when the size of the flexible circuit board is not changed, the width of important signal routing is widened, and the signal attenuation is reduced. As a typical application, the display panel of the present invention may be applied to a mobile terminal, such as a smart band, a smart watch, a Virtual Reality (VR) device, and the like, and may also be a mobile smart phone, an electronic book, an electronic newspaper, a television, a personal portable computer, and the like.
In one embodiment of the present invention, referring to fig. 1, the display panel 100 includes a display substrate 110, a circuit board and a chip on film. The display substrate 110 includes a display region 111 and a non-display region 112 surrounding the display region 111, a fan-out region 113 is disposed in the non-display region 112 near the circuit board, the display substrate 110 and the circuit board are arranged at intervals along a first direction Y, in this embodiment, the number of the circuit boards is two, i.e., the first circuit board 120a and the second circuit board 120b are arranged at intervals in the second direction X, in this embodiment, the number of the COF chips corresponds to the number of the circuit boards one by one, and if the number of the circuit boards is 2, the number of the COF chips is 2, namely, the first chip on film 130a and the second chip on film 130b, the first circuit board 120a is connected to the fan-out area 113 of the display substrate 110 through the first chip on film 130a, and the second circuit board 120b is connected to the fan-out area 113 of the display substrate 110 through the second chip on film 130 b.
A first driving chip 131a is integrally arranged on the first chip on flip film 130a, a driving signal output end of the first driving chip 131a is connected with the fan-out region 113 through a first display signal wire 132a, a driving signal input end of the first driving chip 131a is connected with the first circuit board 120a through a first display signal wire 132a, and the first chip on flip film 130a further includes first redundant wires 133a (dummy wires) arranged at two sides of the first display signal wire 132 a; the second chip on chip 130b is integrally provided with a second driving chip 131b, a driving signal output end of the second driving chip 131b is connected with the fan-out region 113 through a second display signal trace 132b, a driving signal input end of the second driving chip 131b is connected with the second circuit board 120b through a second display signal trace 132b, and the second chip on chip 130b further includes second redundant traces 133b disposed on two sides of the second display signal trace 132 b.
In this embodiment, a bridging portion 114 is disposed along the second direction X on the fan-out area 113 of the display substrate 110 between the first chip on film 130a and the second chip on film 130b, and the bridging portion 114 includes a main body 1141 and connection ends disposed at two ends of the main body 1141, i.e., a first connection end 1142a and a second connection end 1142 b.
The distance between the two circuit boards (i.e. the first circuit board 120a and the second circuit board 120b) is smaller than the length of the bridging portion 114.
The first connection end 1142a is connected to the adjacent first redundant trace 133a on the first chip on flip chip 130a (i.e., the first redundant trace 133a on the adjacent side of the first chip on flip chip 130a and the second chip on flip chip 130 b), and one end of the first redundant trace 133a away from the first connection end 1142a is connected to the first circuit board 120 a; the second connection end 1142b is connected to the adjacent second redundant trace 133b on the second chip on chip 130b, and one end of the second redundant trace 133b away from the second connection end 1142b is connected to the second circuit board 120b, so that a part of signals (for example, low-speed signals with transmission rate) in the first circuit board 120a is transmitted to the second circuit board 120a through the first redundant trace 133a, the bridging portion 114 and the second redundant trace 133 b.
In addition, the first circuit board 120a and the second circuit board 120b are connected by the flexible circuit board 140, and the connection manner is as follows: the first circuit board 120a is provided with a first adaptor connector 150a connected to one end of the flexible circuit board 140, the second circuit board 120b is provided with a second adaptor connector 150b connected to the other end of the flexible circuit board 140, and a part of signals in the first circuit board 120a are transmitted to the second circuit board 120b through the first adaptor connector 150a, the flexible circuit board 140 and the second adaptor connector 150 b. In the conventional display panel, the redundant traces on the adjacent sides of the two flip chip assemblies are idle and do not transmit signals, but in this embodiment, the idle redundant traces, that is, the first redundant trace 133a and the second redundant trace 133b on the adjacent sides of the first flip chip assembly 130a and the second flip chip assembly 130b, are bridged by the bridging portion 114 to implement signal transmission.
One end of the first redundant trace 133a of the first chip on film 130a, which is away from the second chip on film 130b, is connected to the fan-out region 113, and the other end is connected to the first circuit board 120a, so as to form transmission of the GOA signal in the first circuit board 120a to the display substrate 110; one end of the second redundant trace 133b of the second chip on film 130b, which is away from the first chip on film 130a, is connected to the fan-out region 113, and the other end is connected to the second circuit board 120b, so as to form transmission of the GOA signal in the second circuit board 120b to the display substrate 110.
Due to the bridge design of the first redundant trace 133a, the bridge portion 114 and the second redundant trace 133b, a part of all signals that are originally required to be transmitted to the second circuit board 120b by the first adaptor connector 150a, the flexible circuit board 140 and the second adaptor connector 150b in the first circuit board 120a are split by the first redundant trace 133a that is originally idle, that is, a part of signals in the first circuit board 120a are transmitted to the second circuit board 120b through the first redundant trace 133a, the bridge portion 114 and the second redundant trace 133b, so that the signal transmission burden of the flexible circuit board 140 is reduced, the size of the flexible circuit board 140 is reduced, and the sizes of the first adaptor connector 150a and the second adaptor connector 150b can be correspondingly reduced, in this embodiment, the size of the flexible circuit board 140 is reduced by 10 to 20% compared with the existing display panel (the first dashed line frame 140' in fig. 1 represents the structure of the existing flexible circuit board), the PIN count of the first adapter connector 150a and the PIN count of the second adapter connector 150b are respectively reduced from 96 PINs to 80 PINs (a second dashed box 150a 'in fig. 1 indicates the structure of the existing first adapter connector, and a second dashed box 150 b' indicates the structure of the existing second adapter connector).
Alternatively, in this embodiment, under the condition that the size of the flexible circuit board 140 and/or the sizes of the first adaptor connector 150a and the second adaptor connector 150b are not changed, the signal traces on the first circuit board 120a and the second circuit board 120b may be widened, for example, the width of the important signal (for example, voltage signal, GOA signal, and the like) trace is widened, so as to ensure the strength of signal transmission and avoid signal attenuation.
The Circuit Board may be a Printed Circuit Board (PCB) or a Printed Circuit Board with components (PCBA). The connection mode between the chip with the chip on film and the circuit board is pressed and connected through the binding machine, and the circuit board area connected with the chip on film is a golden finger.
In a preferred embodiment of the present invention, referring to fig. 1, the connection end is extended from one end of the main body 1141 to an outer side of one end of the display signal trace of the adjacent flip-chip on the film near another flip-chip on the film. That is, one end of the first connection end 1142a away from the main body 1141 extends to the outer side of one end of the first display signal trace 132a of the first chip on film 130a close to the second display signal trace 132b of the second chip on film 130 b; the second connection end 1142b extends from the end away from the main body 1141 to the outer side of the second display signal trace 132b of the second chip-on-film 130b near the end of the first display signal trace 132a of the first chip-on-film 130 a.
Thus, the first redundant wire 133a extends to the fan-out area 113 and then is connected to the first connection end 1142a in a press fit manner, so that the first redundant wire 133a is connected to the pins of the first connection end 1142a in a one-to-one correspondence manner, thereby ensuring the stability of signal communication and signal transmission. Similarly, the second redundant wire 133b can be extended to the fan-out area 113 and then press-fit connected to the second connection end 1142b, so that the second redundant wire 133b is connected to the pins of the second connection end 1142b in a one-to-one correspondence manner.
In this embodiment, the number of the pins in each of the connection terminals is equal to the number of the redundant traces corresponding to the pins. That is, the number of pins in the first connection end 1142a is the same as the number of the first redundant traces 133a, so as to implement one-to-one correspondence; the number of pins in the second connection end 1142b is the same as that of the second redundant trace 133b, so as to achieve one-to-one correspondence. In another embodiment, the number of the pins in each of the connection ends is greater than the number of the redundant traces corresponding to the pins.
In a preferred embodiment of the present invention, the circuit board includes a window area 121 and a routing area 122 sequentially disposed along a first direction Y, the window area 121 is close to the chip on film, and the display signal routing connected to the signal input end of the chip on film extends to the routing area 122 through the window area 121.
No wiring is arranged on the surface of the circuit board corresponding to the windowing region 121, and protective paint or protective ink is not coated on the surface of the circuit board, so that interference on signal transmission in the display signal wiring and the redundant wiring is avoided; the surface layer of the circuit board corresponding to the wiring area 122 can be provided with signal wiring, and is coated with protective paint or protective ink, and the wiring in the circuit board can be protected by the design of the protective paint or the protective ink, so that the external force damage is avoided.
In another preferred embodiment of the present invention, the number of the circuit boards (or the strip-shaped boards X/Broad) is 2n, n is an integer greater than or equal to 1, and the circuit boards (or the strip-shaped boards X/Broad) are arranged at intervals along the second direction X, in an embodiment, taking n ═ 2 as an example, there are 4 circuit boards (or the strip-shaped boards X/Broad), a bridge portion 114 is disposed in the fan-out region 113 of the display substrate 110 between two adjacent circuit boards (or the strip-shaped boards X/Broad), and the two adjacent circuit boards (or the strip-shaped boards X/Broad) are connected through a flexible circuit board 140.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996738.8A CN113745251A (en) | 2021-08-27 | 2021-08-27 | Display panel and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996738.8A CN113745251A (en) | 2021-08-27 | 2021-08-27 | Display panel and mobile terminal |
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| Publication Number | Publication Date |
|---|---|
| CN113745251A true CN113745251A (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110996738.8A Pending CN113745251A (en) | 2021-08-27 | 2021-08-27 | Display panel and mobile terminal |
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| CN (1) | CN113745251A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512057A (en) * | 2022-02-09 | 2022-05-17 | 武汉华星光电技术有限公司 | Display panel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601166A (en) * | 2016-12-20 | 2017-04-26 | 深圳市华星光电技术有限公司 | Display panel and display device |
| CN107463033A (en) * | 2017-09-01 | 2017-12-12 | 深圳市华星光电技术有限公司 | Display device |
| CN111435207A (en) * | 2019-01-15 | 2020-07-21 | 咸阳彩虹光电科技有限公司 | Display device and electronic equipment |
-
2021
- 2021-08-27 CN CN202110996738.8A patent/CN113745251A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601166A (en) * | 2016-12-20 | 2017-04-26 | 深圳市华星光电技术有限公司 | Display panel and display device |
| CN107463033A (en) * | 2017-09-01 | 2017-12-12 | 深圳市华星光电技术有限公司 | Display device |
| CN111435207A (en) * | 2019-01-15 | 2020-07-21 | 咸阳彩虹光电科技有限公司 | Display device and electronic equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512057A (en) * | 2022-02-09 | 2022-05-17 | 武汉华星光电技术有限公司 | Display panel |
| CN114512057B (en) * | 2022-02-09 | 2024-01-09 | 武汉华星光电技术有限公司 | Display panel |
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Application publication date: 20211203 |
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