CN113129754A - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN113129754A CN113129754A CN202110419135.1A CN202110419135A CN113129754A CN 113129754 A CN113129754 A CN 113129754A CN 202110419135 A CN202110419135 A CN 202110419135A CN 113129754 A CN113129754 A CN 113129754A
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- Prior art keywords
- circuit board
- flexible circuit
- display
- bending
- display module
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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
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
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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
- H05K1/14—Structural association of two or more printed circuits
- H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a display module and a display device, wherein a flexible circuit board which is connected with a first circuit board and a second circuit board in the display module is improved, so that the length of the flexible circuit board is greater than the distance between a first connecting port and a second connecting port, and the length required by a display panel which is changed from a flat state to a folded state is reserved; because the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board are provided with the first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board are provided with the second overlapping area, the two ends of the flexible circuit board are respectively connected with the corresponding connecting ports after being bent inwards and reversely, so that the flexible circuit board has enough extension space in the dynamic bending process of the display panel, the poor microcrack generated during bending can be avoided, the service life of the flexible circuit board can be prolonged, and the display performance of the product can be improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display module and a display device.
Background
The flexible Organic Light Emitting Diode (OLED) display product is expected to become a new generation of display technology due to the advantages of self-luminescence, no backlight, foldability, wide viewing angle, high color gamut and the like. At present, an OLED folding display product can be flexibly switched between two forms of flattening and folding, and the Circuit boards on two sides of a folding area of the folding display product need to be bridged through a Flexible Printed Circuit (FPC).
However, in the dynamic bending process of the whole folding display product, the FPC is subjected to micro-breaking of the wiring, and the display performance of the product is seriously affected.
Disclosure of Invention
This application provides a display module assembly and display device to the shortcoming of current mode to FPC in solving current folding display product produces the little cracked problem of walking the line easily.
In a first aspect, an embodiment of the present application provides a display module, including: the display device comprises a foldable display panel, a first circuit board, a second circuit board and a flexible circuit board; the display panel comprises a first display part and a second display part which are positioned at two sides of the folding part; the first circuit board is connected with the first display part, and a first connecting port is arranged on the first circuit board; the second circuit board is connected with the second display part, and a second connecting port is arranged on the second circuit board; two ends of the flexible circuit board are respectively and electrically connected with the first connecting port and the second connecting port, and the length of the flexible circuit board is greater than the distance between the first connecting port and the second connecting port; when the display panel is flattened, the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board have a first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board have a second overlapping area.
Optionally, the flexible circuit board includes a first bending part, an extending part and a second bending part, which are connected in sequence; the first bending part is positioned at one side of the extending part close to the first circuit board, and the second bending part is positioned at one side of the extending part close to the second circuit board; the end, far away from the extension part, of the first bending part is electrically connected with the first connection port, and the end, far away from the extension part, of the second bending part is electrically connected with the second connection port.
Optionally, an orthographic projection of the first bent part on the first circuit board is covered by an orthographic projection of the extension part on the first circuit board; and/or the orthographic projection of the second bent part on the second circuit board is covered by the orthographic projection of the extension part on the second circuit board.
Optionally, a joint of the extending portion and the first bending portion is in arc transition connection; and/or the joint of the extension part and the second bending part is in arc transition connection.
Optionally, the first and second folded portions are symmetrically arranged with respect to the folded portion.
Optionally, one end of the flexible circuit board is electrically connected to the first connection port through a first connector, and the other end of the flexible circuit board is electrically connected to the second connection port through a second connector; the first connector and/or the second connector is a back lock connector.
Optionally, the first connector includes a first base and a first terminal that are connected in a matching manner, the first base is connected to the first connection port, and the first terminal is connected to one end of the flexible circuit board; the second connector comprises a second base and a second terminal which are connected in a matched mode, the second base is connected with the second connecting port, and the second terminal is connected with the other end of the flexible circuit board.
Optionally, the display module further includes a rotation axis mechanism and a reinforcement member; the rotating shaft mechanism is arranged on the back of the display panel, and the axis of the rotating shaft mechanism is parallel to the folding part; the reinforcing piece is arranged on one side of the flexible circuit board close to the rotating shaft mechanism; one side of the reinforcing piece is fixedly connected with the middle part of the flexible circuit board, and the other side of the reinforcing piece is fixedly connected with the rotating shaft mechanism.
Optionally, the material of the stiffener comprises polyimide; and/or the reinforcing piece is bonded with the flexible circuit board.
In a second aspect, an embodiment of the present application further provides a display device, including the display module according to the first aspect.
The beneficial technical effects brought by the technical scheme provided by the embodiment of the application at least comprise:
according to the display module or the display device provided by the embodiment of the application, the flexible circuit board connected with the first circuit board and the second circuit board is improved, so that the length of the flexible circuit board is greater than the distance between the first connecting port and the second connecting port, and the length required by the display panel in a state of being changed from a flat state to a folded state is reserved; because the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board are provided with the first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board are provided with the second overlapping area, the two ends of the flexible circuit board are respectively connected with the corresponding connecting ports after being bent inwards and reversely, so that the flexible circuit board has enough extension space in the dynamic bending process of the display panel, the poor microcrack generated during bending can be avoided, the service life of the flexible circuit board can be prolonged, and the display performance of the product can be improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram illustrating a connection between a first circuit board and a second circuit board in a display module according to an embodiment of the present disclosure;
FIG. 3 is a front view of FIG. 2 provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a first circuit board and a second circuit board of a display module according to an embodiment of the present disclosure when a display panel is in a folded state.
Wherein:
100-a first circuit board; 110 — a first connection port;
200-a second circuit board; 210-a second connection port;
300-a display panel; 310-a first display; 320-a second display; 330-a fold;
400-a flexible circuit board; 410-an extension; 420-a first bend; 430-a second bending part;
500-a rotating shaft mechanism;
600-a reinforcement;
700-a first connector;
800-second connector.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
In the existing folding display product, the folding display panel comprises a folding part, the display part positioned on one side of the folding part is connected with one circuit board, the display part positioned on the other side of the folding part is connected with the other circuit board, and the two circuit boards are connected by adopting a flexible circuit board.
Therefore, in the dynamic folding process of the display panel, the wiring of the flexible circuit board is easy to micro-fracture, and the service life is seriously influenced. In addition, the two ends of the existing flexible circuit board are connected with the connecting ports on the circuit board by adopting connectors, and the connectors are easy to fall off in the dynamic folding process of the display panel, so that the bad problems of circuit breaking and the like are generated, and the display performance is influenced.
Based on this, the embodiment of the present application provides a display module and a display device, aiming at solving the above-mentioned defects in the prior art.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
With reference to fig. 1 to 3, an embodiment of the present application provides a display module, including: a foldable display panel 300, a first circuit board 100, a second circuit board 200, and a flexible circuit board 400 for connecting the first circuit board 100 and the second circuit board 200.
Specifically, the display panel 300 includes the folding portion 330, the folding portion 330 may be regarded as a portion of the display panel 300 corresponding to the folding, and the folding portion 330 divides the display panel 300 into two, that is, the display panel 300 includes the first display portion 310 (located on the left side of the display panel 300 in fig. 1) and the second display portion 320 (located on the right side of the display panel 300 in fig. 1) located on both sides of the folding portion 330. In this embodiment, when the first display portion 310 and the second display portion 320 are at the same horizontal plane, the display panel 300 is in a flat state; when the first display portion 310 and the second display portion 320 are disposed opposite to each other back to back, the display panel 300 is in a folded state.
Further, the left circuit board in fig. 1 and fig. 2 is the first circuit board 100, the first circuit board 100 is connected to the first display portion 310, and the connection may be realized by adopting a cof (chip on film) or cop (chip on pi) mode, which is convenient for realizing the narrow frame design of the display panel 300. Similarly, the right circuit board in fig. 1 and 2 is the second circuit board 200, and the second circuit board 200 is connected to the second display portion 320, and the connection may be implemented in a COF or COP manner, so as to implement a narrow frame design of the display panel 300.
It should be noted that, according to design requirements, both the first circuit board 100 and the second circuit board 200 may be a multi-layer flexible board or a single-layer rigid board (hard board), and since both the first circuit board 100 and the second circuit board 200 are designed in the prior art, detailed descriptions of the structures of the first circuit board 100 and the second circuit board 200 are not repeated in this embodiment.
In order to facilitate signal transmission between the first circuit board 100 and the second circuit board 200, a first connection port 110 is disposed on the first circuit board 100, and the first connection port 110 is located at an end of the first circuit board 100 close to the second circuit board 200; the second circuit board 200 is provided with a second connection port 210, and the second connection port 210 is located at one end of the second circuit board 200 close to the first circuit board 100. The first connection port 110 and the second port are connected through the flexible circuit board 400, that is, one end of the flexible circuit board 400 is electrically connected to the first connection port 110, and the other end of the flexible circuit board 400 is electrically connected to the second connection port 210.
Optionally, a timing control chip is disposed on the first circuit board 100, and a high-speed differential display signal output by the timing control chip reaches the second circuit board 200 through the flexible circuit board 400.
In this embodiment, when the display panel 300 is in the flat state and the folded state, the length requirement of the flexible circuit board 400 is different, and the length requirement of the folded state is greater than that of the flat state, and the difference between the two is about 20 mm. Therefore, the length of the flexible circuit board 400 is greater than the distance between the first connection port 110 and the second connection port 210 to reserve an increased length required for the folding of the display panel 300.
In addition, when the display panel 300 is unfolded, the orthographic projection of the flexible circuit board 400 on the first circuit board 100 and the first circuit board 100 have a first overlapping area, that is, a left portion of the flexible circuit board 400 is connected with the first connection port 110 by reversely bending a portion; meanwhile, the orthographic projection of the flexible circuit board 400 on the second circuit board 200 and the second circuit board 200 have a second overlapping area, that is, the right portion of the flexible circuit board 400 is connected with the second connection port 210 by reversely bending a portion, so as to improve the bending resistance of the flexible display panel 300 in the dynamic bending process.
It should be noted that the first overlapping area covers at least an orthographic projection of the first connection port 110 on the first circuit board 100 in the horizontal direction in the figure, and the second overlapping area covers at least an orthographic projection of the second connection port 210 on the first circuit board 100 in the horizontal direction in the figure.
In the display module provided by this embodiment, the flexible circuit board 400 connecting the first circuit board 100 and the second circuit board 200 is improved, so that the length of the flexible circuit board 400 is greater than the distance between the first connection port 110 and the second connection port 210, thereby reserving the length required for the display panel 300 to change from the flat state to the folded state; because the orthographic projection of the flexible circuit board 400 on the first circuit board 100 and the first circuit board 100 have a first overlapping area, and the orthographic projection of the flexible circuit board 400 on the second circuit board 200 and the second circuit board 200 have a second overlapping area, two ends of the flexible circuit board 400 are respectively bent inwards and reversely and then connected with corresponding connecting ports, so that the flexible circuit board 400 has enough extension space in the dynamic bending process of the display panel 300, the generation of microcracks during bending can be avoided, the service life of the flexible circuit board 400 can be prolonged, and the display performance of a product can be improved.
In some embodiments, for convenience of description, as shown in fig. 3, the flexible circuit board 400 in the embodiment of the present application includes: a first bending part 420, an extending part 410 and a second bending part 430 connected in sequence. The projection of the structure of the flexible circuit board 400 composed of the first bent part 420, the extended part 410 and the second bent part 430 in a plane perpendicular to the bent parts is approximately in a flat "Ω" shape. It is understood that, when the display panel 300 is in the folded state, the states of the first circuit board 100 and the second circuit board 200 may refer to the structure shown in fig. 4.
Specifically, the first bending part 420 is located on a side of the extending part 410 close to the first circuit board 100, and the second bending part 430 is located on a side of the extending part 410 close to the second circuit board 200. One end (corresponding to one end of the flexible circuit board 400) of the first bending part 420 far away from the extending part 410 is electrically connected to the first connection port 110, and one end (corresponding to the other end of the flexible circuit board 400) of the second bending part 430 far away from the extending part 410 is electrically connected to the second connection port 210.
Optionally, an orthographic projection of the first bending portion 420 on the first circuit board 100 is covered by an orthographic projection of the extending portion 410 on the first circuit board 100, that is, the first bending portion 420 is equivalent to a structure obtained by bending the flexible circuit board 400 inward, so that in the dynamic bending process of the flexible circuit board 400, a deformation amount of a connection portion of the first bending portion 420 and the first connection port 110 is smaller.
Optionally, an orthographic projection of the second bending portion 430 on the second circuit board 200 is covered by an orthographic projection of the extending portion 410 on the second circuit board 200, that is, the second bending portion 430 is equivalent to a structure obtained by bending the flexible circuit board 400 inward, so that in the dynamic bending process of the flexible circuit board 400, a deformation amount of a connection portion between the second bending portion 430 and the second connection port 210 is smaller.
In a specific manufacturing process, the flexible circuit board 400 is in a flattened state in an initial manufacturing process, and both ends of the flexible circuit board can be bent inward by a process such as thermoforming, so as to form a first bent portion 420 and a second bent portion 430, where a portion between the first bent portion 420 and the second bent portion 430 is an extension portion 410. It should be noted that the flexible circuit board 400 itself has a characteristic of being resistant to bending, that is, the first bent portion 420, the extended portion 410, and the second bent portion 430 each have a certain bending resistance.
In some embodiments, referring to fig. 3, in order to avoid micro fracture at the connection between the extending portion 410 and the first bending portion 420, the connection between the extending portion 410 and the first bending portion 420 is an arc transition connection, which can be realized by controlling the curvature of the bending region during the thermal forming process of the first bending portion 420.
Optionally, in order to avoid micro fracture at the connection between the extending portion 410 and the second bending portion 430, the connection between the extending portion 410 and the second bending portion 430 is an arc transition connection, and specifically, the arc degree of the bending region may be controlled during the thermal forming process of the second bending portion 430.
It can be understood that when the radian of the connection portion between the first bent portion 420 or the second bent portion 430 and the extending portion 410 is too small, the connection portion between the first bent portion 420 or the second bent portion 430 and the extending portion 410 is easily micro-fractured due to bending fatigue during the repeated flattening and folding processes of the display panel 300.
In this embodiment, the connection between the first bending part 420 and/or the second bending part 430 and the extending part 410 is set to be in arc transition connection, so as to avoid the problem of micro-fracture caused by bending fatigue at the connection between the first bending part 420 and/or the second bending part 430 and the extending part 410, which is beneficial to further prolonging the service life of the whole flexible circuit board 400.
Alternatively, as shown in fig. 1 to fig. 3, the first bending part 420 and the second bending part 430 are symmetrically arranged about the folding part 330, and when the first circuit board 100 and the second circuit board 200 are symmetrically arranged about the folding part 330, it can be regarded that an orthographic projection area of the first bending part 420 on the first circuit board 100 is equal to an orthographic projection area of the second bending part 430 on the second circuit board 200.
In some embodiments, as shown in fig. 3, one end of the flexible circuit board 400 is electrically connected to the first connection port 110 through the first connector 700, and the other end of the flexible circuit board 400 is electrically connected to the second connection port 210 through the second connector 800.
Optionally, in order to avoid the problem that the connection position of the flexible circuit board 400 and the first connection port 110 or the second connection port 210 is loosened or even falls off, the first connector 700 and/or the second connector 800 in this embodiment adopt a back lock connector. The back lock connector is designed to prevent the flip cover (not shown) from being pried due to the movement of the end of the flexible circuit board 400 during the bending process, thereby avoiding the problem of poor contact.
Further, with continued reference to fig. 3, the first connector 700 includes a first base and a first terminal (not shown in the figure) that are connected in a mating manner, that is, the first base and the first terminal are both part of one of the rear lock connectors, and the first base and the first terminal can be connected in a plugging manner; the first base and the first connection port 110 can be soldered by solder paste, the first terminal is connected to one end of the flexible circuit board 400 (corresponding to one end of the first bending portion 420 away from the extending portion 410), and the first terminal is locked and limited by a flip cover configured on the first terminal.
The second connector 800 comprises a second base and a second terminal (not shown in the figures) for mating connection, i.e. both the second base and the second terminal are part of another back lock connector; the second base and the second connection port 210 can be soldered by solder paste, the second terminal is connected to the other end of the flexible circuit board 400 (corresponding to the end of the second bending portion 430 far from the extending portion 410), and the first terminal is provided with a flip cover to lock and limit the position.
In this embodiment, two ends of the flexible circuit board 400 are bent inward, and the back lock connector is electrically connected to the first connection port 110 and the second connection port 210, so that the problem of loose contact of the end of the flexible circuit board 400 caused by the folding process of the display panel 300 can be prevented, and the reliability of the product can be improved.
In some embodiments, with continued reference to fig. 1 to 4, the display module in this embodiment further includes a rotation axis mechanism 500 and a reinforcing member 600 in addition to the display panel 300, the first circuit board 100, the second circuit board 200 and the flexible circuit board 400. Fig. 4 is a schematic view illustrating the first circuit board 100 and the second circuit board 200 when the display panel 300 is in a folded state.
Specifically, the rotation shaft mechanism 500 is disposed at the back of the display panel 300, and the axis of the rotation shaft mechanism 500 is parallel to the folding portion 330, that is, the first display portion 310 and the second display portion 320 are rotatable about the rotation shaft mechanism 500, thereby achieving switching between the folded and unfolded states of the display panel 300.
The reinforcing member 600 in this embodiment is a sheet structure, and the reinforcing member 600 is specifically disposed on one side of the flexible circuit board 400 close to the rotating shaft mechanism 500. One side of the reinforcing member 600 is fixedly connected to the middle portion of the flexible circuit board 400, and the other side of the reinforcing member 600 is fixedly connected to the rotating shaft mechanism 500.
In this embodiment, the middle portion of the flexible circuit board 400 is connected to the rotating shaft mechanism 500 through the reinforcing member 600, so that the flexible circuit board 400 can be prevented from moving during the folding and flattening processes of the display panel 300, the problems of micro-fracture and loose end portions of the flexible circuit board 400 can be further reduced, and the reliability of the flexible circuit board 400 can be improved.
Optionally, with reference to fig. 1 to 4, the material of the stiffener 600 in this embodiment includes Polyimide (PI), and the stiffener 600 made of PI has a certain flexibility, and can support the flexible circuit board 400 without causing hard damage to the flexible circuit board 400.
Further, the middle portion of the flexible circuit board 400 (specifically, the middle portion of the extending portion 410) and the reinforcing member 600 are bonded by an adhesive layer such as glue, so that the flexible circuit board 400 is fixed, and the flexible circuit board 400 is prevented from being damaged by the connection manner.
Optionally, as shown in fig. 2, a positioning protrusion is disposed on the rotating shaft mechanism 500, a hole corresponding to the positioning protrusion is disposed on the reinforcing member 600, and through the matching between the hole and the positioning protrusion, the reinforcing position can be limited, and further fixing can be achieved through glue or the like. Thus, the spacing between the flexible circuit board 400 and the rotating shaft mechanism 500 is indirectly realized, and the flexible circuit board 400 is prevented from moving in the dynamic bending process.
Based on the same inventive concept, the embodiment of the present application further provides a display device, which includes the display module described in the embodiment of the present application. The display device in this embodiment may be an electronic product such as a folding computer or a folding mobile phone.
The display device provided by the embodiment of the application comprises the display module in the embodiment, and the length of the flexible circuit board is larger than the distance between the first connecting port and the second connecting port by improving the flexible circuit board in the display module, so that the length required by the display panel which is changed from a flat state to a folded state is reserved; because the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board are provided with the first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board are provided with the second overlapping area, the two ends of the flexible circuit board are respectively connected with the corresponding connecting ports after being bent inwards and reversely, so that the flexible circuit board has enough extension space in the dynamic bending process of the display panel, the poor microcrack generated during bending can be avoided, the service life of the flexible circuit board can be prolonged, and the display performance of the whole display device can be improved.
The embodiments of the application have at least the following technical effects:
1. through the improvement of the flexible circuit board in the display module, the length of the flexible circuit board is larger than the distance between the first connecting port and the second connecting port, so that the length required by the display panel changing from a flat state to a folded state is reserved; because the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board are provided with the first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board are provided with the second overlapping area, the two ends of the flexible circuit board are respectively connected with the corresponding connecting ports after being bent inwards and reversely, so that the flexible circuit board has enough extension space in the dynamic bending process of the display panel, the poor microcrack generated during bending can be avoided, the service life of the flexible circuit board can be prolonged, and the display performance of the whole display device can be improved.
2. The orthographic projection of the first bending part on the first circuit board is covered by the orthographic projection of the extending part on the first circuit board, the orthographic projection of the second bending part on the second circuit board is covered by the orthographic projection of the extending part on the second circuit board, and in the dynamic bending process of the flexible circuit board, deformation quantities of a connecting part of the first bending part and the first connecting port and a connecting part of the second bending part and the second connecting port are smaller, so that the possibility of micro fracture of the flexible circuit board is favorably reduced.
3. Through setting up first kink and/or second kink and extension portion junction into circular arc transitional coupling, avoid first kink and/or second kink and the junction of extension portion to appear bending fatigue and the problem of micro fracture appears, be favorable to further prolonging the life of whole flexible circuit board.
4. The both ends of flexible circuit board inwards buckle to adopt back lock connector and first connection port and second connection port to realize the electricity and be connected, can prevent that display panel from leading to the not hard up problem of contact to take place for the tip of flexible circuit board at folding in-process, be favorable to promoting the reliability of product.
5. The middle part of the flexible circuit board is connected with the rotating shaft mechanism through the reinforcing piece, so that the flexible circuit board can be prevented from moving in the folding and flattening processes of the display panel, the problems of micro-fracture and end loosening of the flexible circuit board can be further reduced, and the reliability of the flexible circuit board is improved.
6. The material of the reinforcing piece comprises polyimide, and the reinforcing piece made of the polyimide material has certain flexibility, so that the flexible circuit board is supported, and the rigid damage to the flexible circuit board is avoided; meanwhile, the middle part of the flexible circuit board (particularly the middle part of the extension part) is bonded with the reinforcing part through bonding layers such as glue, so that the flexible circuit board is fixed, and the flexible circuit board can be prevented from being damaged by the connection mode.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A display module, comprising:
a foldable display panel including a first display part and a second display part at both sides of a folding part;
the first circuit board is connected with the first display part, and a first connecting port is arranged on the first circuit board;
the second circuit board is connected with the second display part, and a second connecting port is arranged on the second circuit board;
the two ends of the flexible circuit board are respectively and electrically connected with the first connecting port and the second connecting port, and the length of the flexible circuit board is greater than the distance between the first connecting port and the second connecting port; when the display panel is flattened, the orthographic projection of the flexible circuit board on the first circuit board and the first circuit board have a first overlapping area, and the orthographic projection of the flexible circuit board on the second circuit board and the second circuit board have a second overlapping area.
2. The display module according to claim 1, wherein the flexible circuit board comprises a first bending part, an extending part and a second bending part which are connected in sequence; the first bending part is positioned at one side of the extending part close to the first circuit board, and the second bending part is positioned at one side of the extending part close to the second circuit board;
the end, far away from the extension part, of the first bending part is electrically connected with the first connection port, and the end, far away from the extension part, of the second bending part is electrically connected with the second connection port.
3. The display module according to claim 2, wherein an orthogonal projection of the first bending portion on the first circuit board is covered by an orthogonal projection of the extending portion on the first circuit board;
and/or the orthographic projection of the second bent part on the second circuit board is covered by the orthographic projection of the extension part on the second circuit board.
4. The display module according to claim 2, wherein a connection between the extending portion and the first bending portion is an arc transition connection; and/or the joint of the extension part and the second bending part is in arc transition connection.
5. The display module according to claim 2, wherein the first bending portion and the second bending portion are symmetrically disposed about the folding portion.
6. The display module assembly according to any one of claims 1 to 5, wherein one end of the flexible circuit board is electrically connected to the first connection port through a first connector, and the other end of the flexible circuit board is electrically connected to the second connection port through a second connector;
the first connector and/or the second connector is a back lock connector.
7. The display module assembly according to claim 6, wherein the first connector comprises a first base and a first terminal, the first base and the first terminal are connected in a matching manner, the first base is connected with the first connection port, and the first terminal is connected with one end of the flexible circuit board;
the second connector comprises a second base and a second terminal which are connected in a matched mode, the second base is connected with the second connecting port, and the second terminal is connected with the other end of the flexible circuit board.
8. The display module according to any one of claims 1 to 5, further comprising a rotation axis mechanism and a reinforcing member;
the rotating shaft mechanism is arranged on the back of the display panel, and the axis of the rotating shaft mechanism is parallel to the folding part;
the reinforcing piece is arranged on one side of the flexible circuit board close to the rotating shaft mechanism; one side of the reinforcing piece is fixedly connected with the middle part of the flexible circuit board, and the other side of the reinforcing piece is fixedly connected with the rotating shaft mechanism.
9. The display module of claim 8, wherein the material of the stiffener comprises polyimide; and/or the reinforcing piece is bonded with the flexible circuit board.
10. A display device comprising the display module according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110419135.1A CN113129754B (en) | 2021-04-19 | 2021-04-19 | Display module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419135.1A CN113129754B (en) | 2021-04-19 | 2021-04-19 | Display module and display device |
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| CN113129754A true CN113129754A (en) | 2021-07-16 |
| CN113129754B CN113129754B (en) | 2023-05-16 |
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| CN113674627A (en) * | 2021-08-27 | 2021-11-19 | 武汉华星光电半导体显示技术有限公司 | Display module and display terminal |
| CN113724592A (en) * | 2021-08-27 | 2021-11-30 | 京东方科技集团股份有限公司 | Display module and display device |
| CN114038330A (en) * | 2021-11-30 | 2022-02-11 | 武汉华星光电半导体显示技术有限公司 | Foldable display module and foldable display device |
| CN114596782A (en) * | 2022-03-17 | 2022-06-07 | 武汉华星光电半导体显示技术有限公司 | Folding screen equipment and flexible display module thereof |
| CN115119399A (en) * | 2022-06-24 | 2022-09-27 | 江苏一键联新能源科技有限公司 | Multi-mode heavy current charging circuit board |
| 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 |
| CN116133306A (en) * | 2023-02-21 | 2023-05-16 | 维沃移动通信有限公司 | Electronic equipment |
| WO2024022140A1 (en) * | 2022-07-25 | 2024-02-01 | 华为技术有限公司 | Foldable electronic device |
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