CN110767089B - Structure and method for solving poor bending of curved surface display device - Google Patents
Structure and method for solving poor bending of curved surface display device Download PDFInfo
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- CN110767089B CN110767089B CN201911039065.6A CN201911039065A CN110767089B CN 110767089 B CN110767089 B CN 110767089B CN 201911039065 A CN201911039065 A CN 201911039065A CN 110767089 B CN110767089 B CN 110767089B
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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
- G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a structure and a method for solving the poor bending of a curved surface display device, wherein a display panel in the curved surface display device is provided with a drive Circuit in a sectional grouping mode, so that a Printed Circuit Board (PCBA) and a Flexible Printed Circuit Board (FPC) can move along with the bending curvature of the display panel, and the pulling damage of a Chip On Film (COF) and the Printed Circuit Board in the bending process of the curved surface display device is solved. Meanwhile, the invention electrically connects the printed circuit board and the flexible circuit board in a binding mode, which can solve the problem of poor bending of the curved surface display device and can not increase excessive production cost.
Description
Technical Field
The invention relates to the technical field of display devices, in particular to a structure and a method for solving poor bending of a curved surface display device.
Background
The human eyeball is a sphere, and the eye membrane is also in a curved shape, so that objects on a plane are actually bent when being imaged through the eyeball. And the design of curved surface screen will more laminate human eye physiology curve structure to the visual experience of zero distortion is made, and the eyestrain of alleviating the viewer strengthens the comfort. Due to the surrounding sense of the two sides, the curved screen can create an on-the-spot visual enjoyment for the vast users. Compared with a flat television, the display effect of the curved television with a proper radian is closer to the situation that human eyes see a real scene, and the picture deformation is not generated.
However, in the manufacturing process of the advanced curved-surface television, the display panel is bent, wherein the problem that the display panel is not subjected to the manufacturing process of the conventional flat-panel television is solved. When the flexible display panel is bent in a curved surface, the non-flexible circuit board around the display panel can be pulled by the display panel in a bent state, which causes circuit damage to the drive circuit and the circuit board, and finally causes poor display of the curved television.
Fig. 1 is a schematic diagram of a conventional curved-surface television driving structure. The display panel 11 of the curved display device 1 is electrically connected to one end of a plurality of Chip On Film (COF) packages 12, the plurality of COF packages 12 are a plurality of driving circuits of the display panel 11, each of the plurality of COF packages 12 is provided with a driving Chip (Source Driver IC) 121 of the display panel 11, and the other end of the plurality of COF packages 12 is connected to a Printed Circuit Board Assembly (PCBA) 13.
The printed circuit board assembly 13 is hard material and has no flexibility, compared with the display panel 11. In the manufacturing process of the curved-surface television, because one end of the flip-chip package 12 is connected to the display panel 11 and the other end is connected to the printed circuit board assembly 13, the printed circuit board assembly 13 can only generate slight deformation and cannot completely follow the curvature required by the curved-surface television to which the display panel 11 is bent, the stress generated in the bending process is accumulated in the flip-chip package 12 and the printed circuit board assembly 13, so that the circuit of the flip-chip package 12 and the printed circuit board assembly 13 is damaged, and finally the display of the curved-surface display device 1 is poor.
Disclosure of Invention
In order to solve the problem of poor bending of the curved surface display device, the invention provides a curved surface display device. The invention divides the printed circuit board in the prior art into a plurality of sections, and the curved surface display device comprises a display panel, a plurality of chip on film packaging parts, a plurality of printed circuit boards and a plurality of flexible circuit boards.
Each chip on film package is provided with a panel driving chip, and one end of each chip on film package is electrically connected with the display panel.
The printed circuit boards are electrically connected with the other ends of the chip on film packages, each printed circuit board comprises a first group of electrodes and a second group of electrodes opposite to the first group of electrodes, and each first group of electrodes is electrically connected with the panel driving chip.
Each of the flexible circuit boards includes a third set of electrodes correspondingly bonded (binding) to the second set of electrodes of one of the printed circuit boards to form a set of continuous electrode structures, and a fourth set of electrodes opposite to the third set of electrodes correspondingly bonded (binding) to the second set of electrodes of another one of the printed circuit boards to form another set of continuous electrode structures.
Furthermore, the second group of electrodes comprises a plurality of second electrode pins. The third group of electrodes comprises a plurality of third electrode pins which are correspondingly bound on the plurality of second electrode pins to form a continuous electrode structure. The fourth group of electrodes comprises a plurality of fourth electrode pins which are correspondingly bound to the other second electrode pins to form another continuous electrode structure.
In addition, each printed circuit board also comprises a plurality of first group electrodes. Each printed circuit board is electrically connected with a plurality of panel driving chips to form a group of panel driving chip groups. And each flexible circuit board is bound with two groups of panel driving chip sets.
The invention constructs the drive circuit of the display panel in the curved display device in a segmented grouping mode, so that each segment of the printed circuit board and the flexible circuit boards can move along with the bending curvature of the display panel when the display panel is bent, and stress is not accumulated due to the bending of the display panel, thereby maintaining the circuit of the drive circuit and the normal display function of the curved display device. Meanwhile, the binding mode is used for quickly and stably electrically connecting the circuits of the elements, so that the problems in the prior art can be solved, and excessive production cost cannot be increased.
For a better understanding of the detailed description and the embodiments of the present invention, reference should be made to the following drawings which are provided for purposes of illustration and description and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic diagram of a driving structure of a conventional curved display device.
Fig. 2 is a schematic diagram of a driving structure of the curved display device according to the present invention.
Fig. 3 is a detailed view of region a of fig. 2.
Detailed Description
The features and spirit of the present invention will be more clearly described in the following detailed description of the embodiments, which is not intended to limit the scope of the present invention by the embodiments disclosed. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims appended hereto.
Referring to fig. 2, fig. 2 is a schematic diagram of a driving structure of a curved display device according to the present invention. The invention provides a curved surface display device 2, which comprises a display panel 21, a plurality of chip on film packages 22, a plurality of printed circuit boards 23 and a plurality of flexible circuit boards 24.
Each of the flip-chip packages 22 has a panel driver chip 221 disposed thereon. One end of the plurality of flip-chip packages 22 is electrically connected to the display panel 21.
In the present embodiment, one end of each printed circuit board 23 is electrically connected to the other ends of the two flip-chip packages 22 to form a panel driver chipset. In practical implementation, the present invention does not limit one end of each printed circuit board 23 to electrically connect two flip-chip packages 22, but the number of the flip-chip packages is adjusted according to the actual product or process requirement.
Each of the flexible circuit boards 24 is electrically connected to the other ends of the two printed circuit boards 23 in a binding (Bonding) manner.
Thus, in the present embodiment, the printed circuit board in the prior art is divided into a plurality of segments, and then the plurality of flexible circuit boards 24 are electrically connected to the printed circuit boards 23 in a binding manner, so as to construct the driving circuit in a segmented and grouped manner, so that when the display panel 21 is bent, the flexible circuit boards 23 and the plurality of flexible circuit boards 24 can move along with the bending curvature of the display panel, and stress is not accumulated due to the bending of the display panel 21, thereby maintaining the circuit of the driving circuit and the normal display function of the curved display device 2. Meanwhile, the binding mode is used for quickly and stably electrically connecting the circuits of the elements, so that the problems in the prior art can be solved, and excessive production cost cannot be increased.
Referring to fig. 3, fig. 3 is a detailed view of a region a in fig. 2.
More specifically, each of the printed circuit boards 23 in the embodiment includes a first set of electrodes 231 and a second set of electrodes 232 opposite to the first set of electrodes 231, and each of the first set of electrodes 231 is electrically connected to the panel driving chip 221.
Each of the flexible circuit boards 24 includes a third set of electrodes 241 and a fourth set of electrodes 242 opposite to the third set of electrodes 241, the third set of electrodes 241 correspondingly forms a set of continuous electrode structures 25a with the second set of electrodes 232 bound to one of the printed circuit boards 23, and the fourth set of electrodes 242 correspondingly forms another set of continuous electrode structures 25b with the second set of electrodes 232 bound to another one of the printed circuit boards 23.
The bonding method may include wire bonding, hot press bonding, cold press bonding, ultrasonic bonding, and metal bonding, so as to electrically connect the third set of electrodes 241 to the second set of electrodes 232 of one printed circuit board 23 to form a set of continuous electrode structure 25a, or electrically connect the fourth set of electrodes 242 to the second set of electrodes 232 of another printed circuit board 23 to form another set of continuous electrode structure 25 b.
The two groups of panel driving chip sets are connected in series through each of the flexible circuit boards 24 and the two groups of continuous electrode structures 25a and 25 b. Therefore, when the display panel 21 is flexed, each of the flexible circuit boards 24 is correspondingly bent, so that the plurality of flip-chip packages 22 and the plurality of printed circuit boards 23 are not stressed by the bending of the display panel 21, thereby solving the problem of pulling damage to the plurality of flip-chip packages 22 and the plurality of printed circuit boards 23 during the bending of the display panel 21. Meanwhile, the binding mode is used for quickly and stably electrically connecting the circuits of the elements, so that the problems in the prior art can be solved, and excessive production cost cannot be increased.
In more detail, in the present embodiment, the second group of electrodes 232 includes a plurality of second electrode pins 2321. The third group of electrodes 241 includes a plurality of third electrode pins 2411, which are correspondingly bound to the plurality of second electrode pins 2321 to form a continuous electrode structure 25 a. The fourth group of electrodes 242 includes a plurality of fourth electrode pins 2421 correspondingly bound to another plurality of second electrode pins 2321 to form another continuous electrode structure 25 b. A plurality of continuous electrode structures are constructed by binding a plurality of corresponding electrode pins, so that a solution with stability, pulling resistance and low production cost is provided.
In more detail, in the present embodiment, the display panel 21 of the curved display device 2 is a curved television display screen.
The invention also provides a manufacturing method corresponding to the embodiment, a manufacturing method of the curved surface display device 2, comprising the following steps:
1. a plurality of chip on film packages 22 are provided, and each chip on film package 22 is provided with a panel driving chip 221.
2. A plurality of printed circuit boards 23 are provided, each of the printed circuit boards 23 comprising a first set of electrodes 231 and a second set of electrodes 232 opposite the first set of electrodes 231.
3. A plurality of flexible circuit boards 24 are provided, each of the flexible circuit boards 24 comprising a third set of electrodes 241 and a fourth set of electrodes 242 opposite the third set of electrodes 241.
4. One end of the plurality of flip-chip packages 22 is electrically connected to the display panel 21.
5. The other end of the two flip-chip packages 22 is electrically connected to each of the printed circuit boards 23, and each of the first set of electrodes 231 is electrically connected to the panel driving chip 221.
6. The second set of electrodes 232 correspondingly bound to the third set of electrodes 241 on the printed circuit board 23 form a set of continuous electrode structures 25 a.
7. The second set of electrodes 232 correspondingly bound to the fourth set of electrodes 242 on the other printed circuit board 23 form another set of continuous electrode structures 25 b.
Thus, the manufacturing method divides the printed circuit board of the prior art into a plurality of sections, electrically connects the plurality of flexible circuit boards 24 to the printed circuit boards 23 in a binding manner, and constructs the driving circuit in a sectional grouping manner, so that the printed circuit boards 23 and the plurality of flexible circuit boards 24 can move along with the bending curvature of the display panel when the display panel 21 is bent, and stress is not accumulated due to the bending of the display panel 21, thereby maintaining the normal display function of the circuit of the driving circuit and the curved display device 2. Meanwhile, the binding mode is used for quickly and stably electrically connecting the circuits of the elements, so that the problems in the prior art can be solved, and excessive production cost cannot be increased.
The manufacturing method electrically connects the other ends of the two COF packages 22 to each of the printed circuit boards 23 to form a panel driving chipset. In practical implementation, the present invention does not limit one end of each printed circuit board 23 to be electrically connected to two flip-chip package assemblies 22, but adjusts the number of the flip-chip packages in groups according to actual product or process requirements, and does not limit the process sequence of the above steps.
The bonding method may include wire bonding, hot press bonding, cold press bonding, ultrasonic bonding, and metal bonding, so as to electrically connect the third set of electrodes 241 to the second set of electrodes 232 of one printed circuit board 23 to form a set of continuous electrode structure 25a, or electrically connect the fourth set of electrodes 242 to the second set of electrodes 232 of another printed circuit board 23 to form another set of continuous electrode structure 25 b.
The two groups of panel driving chip sets are connected in series through each of the flexible circuit boards 24 and the two groups of continuous electrode structures 25a and 25 b. Therefore, when the display panel 21 is flexed, each of the flexible circuit boards 24 is correspondingly bent, so that the plurality of flip-chip packages 22 and the plurality of printed circuit boards 23 are not stressed by the bending of the display panel 21, thereby solving the problem of pulling damage to the plurality of flip-chip packages 22 and the plurality of printed circuit boards 23 during the bending of the display panel 21. Meanwhile, the binding mode is used for quickly and stably electrically connecting the circuits of the elements, so that the problems in the prior art can be solved, and excessive production cost cannot be increased.
In more detail, in the manufacturing method, the second group of electrodes 232 includes a plurality of second electrode pins 2321. The third group of electrodes 241 includes a plurality of third electrode pins 2411, which are correspondingly bound to the plurality of second electrode pins 2321 to form a continuous electrode structure 25 a. The fourth group of electrodes 242 includes a plurality of fourth electrode pins 2421 correspondingly bound to another plurality of second electrode pins 2321 to form another continuous electrode structure 25 b. A plurality of continuous electrode structures are constructed by binding a plurality of corresponding electrode pins, so that a solution with stability, pulling resistance and low production cost is provided.
In more detail, in the manufacturing method, the display panel 21 of the curved display device 2 is a curved television display screen.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A curved surface display device, comprising:
a display panel;
the display panel comprises a plurality of chip on film packages, a plurality of display panels and a plurality of display modules, wherein each chip on film package is provided with a panel driving chip, and one end of each chip on film package is electrically connected with the display panel;
the printed circuit boards are electrically connected with the other ends of the chip on film packages, each printed circuit board comprises a first group of electrodes and a second group of electrodes opposite to the first group of electrodes, each first group of electrodes is electrically connected with the panel driving chip, and the second group of electrodes are arranged in the center of the long edge of each printed circuit board; and
a plurality of flexible circuit boards, each flexible circuit board including a third set of electrodes and a fourth set of electrodes opposite to the third set of electrodes, the third set of electrodes being correspondingly bound to the second set of electrodes of one of the printed circuit boards to form a set of continuous electrode structures, the fourth set of electrodes being correspondingly bound to the second set of electrodes of another one of the printed circuit boards to form another set of continuous electrode structures;
when the display panel is bent, each flexible circuit board is correspondingly bent.
2. The curved display device as claimed in claim 1, wherein the second group of electrodes comprises a plurality of second electrode pins, the third group of electrodes comprises a plurality of third electrode pins correspondingly bound to the plurality of second electrode pins to form a continuous electrode structure, and the fourth group of electrodes comprises a plurality of fourth electrode pins correspondingly bound to another plurality of second electrode pins to form another continuous electrode structure.
3. The curved display device of claim 1, wherein each printed circuit board further comprises a plurality of first electrodes, each printed circuit board is electrically connected to a plurality of panel driver chips to form a set of panel driver chip sets, and each flexible circuit board is bound to two sets of panel driver chip sets.
4. The curved display device defined in claim 1, wherein the display panel is a curved television display screen.
5. A method for manufacturing a curved surface display device, comprising the steps of:
providing a plurality of chip on film packages, wherein each chip on film package is provided with a panel driving chip;
providing a plurality of printed circuit boards, wherein each printed circuit board comprises a first group of electrodes and a second group of electrodes opposite to the first group of electrodes, and the second group of electrodes are arranged in the center of the long side of each printed circuit board;
providing a plurality of flexible circuit boards, each of the flexible circuit boards comprising a third set of electrodes and a fourth set of electrodes opposite the third set of electrodes;
electrically connecting one end of the chip on film packages to a display panel;
electrically connecting the other ends of the chip on film packages to the printed circuit boards, wherein each first group of electrodes is electrically connected with the panel driving chip;
correspondingly binding the third group of electrodes to the second group of electrodes of the printed circuit board to form a group of continuous electrode structures; and
correspondingly binding the fourth group of electrodes to the second group of electrodes of another printed circuit board to form another group of continuous electrode structures;
when the display panel is bent, each flexible circuit board is correspondingly bent.
6. The method as claimed in claim 5, wherein the second group of electrodes comprises a plurality of second electrode pins, the third group of electrodes comprises a plurality of third electrode pins correspondingly bound to the plurality of second electrode pins to form a continuous electrode structure, and the fourth group of electrodes comprises a plurality of fourth electrode pins correspondingly bound to another plurality of second electrode pins to form another continuous electrode structure.
7. The method of claim 5, wherein each of the printed circuit boards further comprises a plurality of first group electrodes, each of the printed circuit boards is electrically connected to a plurality of the panel driving chips to form a group of panel driving chip sets, and each of the flexible circuit boards is bound to two of the panel driving chip sets.
8. The method for manufacturing a curved display device according to claim 5, wherein the display panel is a curved television display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911039065.6A CN110767089B (en) | 2019-10-29 | 2019-10-29 | Structure and method for solving poor bending of curved surface display device |
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| CN201911039065.6A CN110767089B (en) | 2019-10-29 | 2019-10-29 | Structure and method for solving poor bending of curved surface display device |
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| CN110767089B true CN110767089B (en) | 2021-05-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785165B (en) * | 2020-06-15 | 2022-11-22 | 云谷（固安）科技有限公司 | Curved surface display device and flexible display panel |
| CN111798757A (en) | 2020-07-10 | 2020-10-20 | Tcl华星光电技术有限公司 | Display panel and display device |
| CN112331074A (en) * | 2020-11-02 | 2021-02-05 | 京东方科技集团股份有限公司 | Display module, binding method, display device and display terminal |
| CN215265347U (en) * | 2021-01-27 | 2021-12-21 | 京东方科技集团股份有限公司 | Bending equipment, bent device to be bent and display device |
| CN113107957B (en) * | 2021-03-31 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Shaft body and display device |
| CN114442379B (en) * | 2022-01-28 | 2023-08-01 | 苏州华星光电技术有限公司 | Display panel and display device |
| CN115273666A (en) * | 2022-07-29 | 2022-11-01 | 京东方科技集团股份有限公司 | Display module and display device |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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