CN213903994U - Display device - Google Patents
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- CN213903994U CN213903994U CN202022545971.8U CN202022545971U CN213903994U CN 213903994 U CN213903994 U CN 213903994U CN 202022545971 U CN202022545971 U CN 202022545971U CN 213903994 U CN213903994 U CN 213903994U
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Abstract
The utility model relates to a show technical field, provide a display device, this display device includes display panel and backlight unit, and this display device still includes: a first circuit board with a first signal line arranged therein, the first circuit board being disposed in the backlight module; a second circuit board for driving the display panel; the first flexible circuit board is respectively connected with the display panel and the first circuit board and is used for realizing signal transmission between the display panel and the first circuit board; and the second flexible circuit board is respectively connected with the second circuit board and the first circuit board and used for realizing signal transmission between the second circuit board and the first circuit board, wherein a driving chip is arranged on the display panel and used for supplying image signals to the display panel. Therefore, the problem of larger frame of the existing module can be solved, and the thinning of the backlight module and the narrowing of the frame are realized.
Description
Technical Field
The utility model relates to a show technical field, concretely relates to display device.
Background
Most of the existing liquid crystal displays in the market are backlight liquid crystal displays (lcds), which include a liquid crystal display panel and a backlight Module (backlight Module). The liquid crystal display panel operates on the principle that liquid crystal molecules are filled between a Thin Film Transistor Array (TFT Array Substrate) and a Color Filter (CF) Substrate, and driving voltages are applied to the two substrates to control the rotation direction of the liquid crystal molecules, so that light of the backlight module is refracted out to generate a picture.
With the continuous development of the panel industry, the frame size of the liquid crystal display panel is continuously challenged. Due to the compressible size of the bezel (border), the industry has been challenged to design a panel (panel) in which the driver Chip of a 3.5mm wide bezel is bonded to Glass (COG), and a panel (Chip On FPC, COF) in which the driver Chip of a 2.0mm wide bezel is bonded to a flexible circuit board, where the wiring pattern of the COF is generally composed of inner leads connected to the electrodes of the Chip and outer leads connected to an external circuit. Generally, in a driving Circuit of a liquid crystal television, a COF has a relatively thin trace at one end connected to a Printed Circuit Board (PCB) and a relatively dense trace at one end connected to a display panel.
With the maturity and perfection of display technology, people increasingly strongly demand high contrast, high resolution, narrow frame and thinness of display screens. As the resolution is continuously increased to 4K and 8K, the display screen also faces a plurality of design problems. Taking four driving chips as an example, referring to fig. 1, a display device 100 provided in the prior art includes a display panel and a backlight module, wherein the display panel includes: the liquid crystal display device includes a TFT substrate 102, a color filter substrate 101 disposed to face the TFT substrate 102, a sealing member (not shown) for bonding the TFT substrate 102 and the color filter substrate 101, and a liquid crystal layer (not shown) sealed between the TFT substrate 102 and the color filter substrate 101, wherein the TFT substrate 102 has an extended portion extending outward, a plurality of panel terminals 1021 are provided on one surface of the extended portion, and the panel terminals 1021 are directly or indirectly connected to wiring provided in a display region. The frame design of the module in the display device 100 is that 1 FPC 110 is connected to one driver chip, and the bonding areas 121 (as shown in fig. 2) of each driver chip on the display panel are correspondingly connected by the traces through the circuit board 120 with the traces of less panel terminals 1021, and the flexible circuit board (FPC)110 is respectively and correspondingly electrically connected to the panel terminals 1021 of the TFT substrate 102.
As shown in fig. 2 and fig. 3, generally, a distance c between the bonding region 121 and the device region 122 in the circuit board 120 is not less than 1.55mm, a reserved range b of the bonding region 121 in the Y direction should not be less than 4.05mm, no device can be placed in a reserved range d of the X direction not less than 2.5mm (the length e of the gold finger), and a design requirement of the gold finger region in the bonding region 121 is to satisfy that a reserved range a of the gold finger region in the Y direction should not be less than 2.8mm, and a reserved safety interval f should not be less than 0.3 mm.
However, because the mounting requirements of the FPC and the components are limited, the positions of the bonding areas 121 connected with the FPC on the circuit board 120 are dispersed and the transverse interval cannot be reduced, which causes the waste of the area of the PCBA and causes the transverse size of the PCBA to be too large, thereby affecting the size of the frame of the whole module.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a display device can improve the great problem of current module frame, realizes backlight unit's slimming and frame narrowness.
According to the utility model provides a pair of display device, this display device includes display panel and backlight unit, and this display device still possesses:
the first circuit board is internally provided with a first signal wire and is arranged in the backlight module;
a second circuit board for driving the display panel;
the first flexible circuit board is respectively connected with the display panel and the first circuit board and is used for realizing signal transmission between the display panel and the first circuit board;
a second flexible circuit board connected with the second circuit board and the first circuit board respectively for realizing signal transmission between the second circuit board and the first circuit board,
the display panel is provided with a driving chip, and the driving chip is used for supplying image signals to the display panel.
Preferably, the display panel includes an array substrate and a color filter substrate which are opposed to each other, and a liquid crystal layer sealed between the array substrate and the color filter substrate, the array substrate has an extending portion extending outward on at least one side in a planar extending direction, and a panel terminal is provided on one surface of the extending portion, one side of the panel terminal is directly or indirectly connected to a second signal line provided in the display panel,
the second signal line is a data line and/or a scanning line.
Preferably, the other sides of the panel terminals are respectively connected to the first ends of the first flexible circuit boards.
Preferably, the first circuit board is provided with a first bonding area,
the bonding areas are respectively and correspondingly connected with the second ends of the first flexible circuit boards.
Preferably, the first circuit board is further provided with a second bonding area,
the second bonding area is connected with the second circuit board through the second flexible circuit board.
Preferably, the frame of the backlight module further includes a metal layer, the metal layer is used for assembling the first circuit board, the metal layer has a plurality of slits, and the plurality of slits are disposed from one side of the metal layer in the thickness direction toward the bonding area on the first circuit board and respectively serve as channels of the first flexible circuit board and the second flexible circuit board.
Preferably, a wire storage groove is formed in the metal layer in a region close to the slit, and the wire storage groove is used for accommodating the reserved bent part of the flexible circuit board.
Preferably, the first circuit board is embedded in the metal layer and disposed in a side wall opposite to a board surface of the first circuit board.
Preferably, no other components are integrated on the first circuit board.
Preferably, the first bonding region on the first circuit board and the second end of the first flexible circuit board are connected by an anisotropic conductive film, respectively, and the panel terminal and the first end of the first flexible circuit board are connected by an anisotropic conductive film, respectively.
The utility model has the advantages that: the utility model provides a pair of display device, this display device include display panel and backlight unit, and this display device still includes: a first circuit board with a first signal line arranged therein, the first circuit board being disposed in the backlight module; a second circuit board for driving the display panel; the first flexible circuit board is respectively connected with the display panel and the first circuit board and is used for realizing signal transmission between the display panel and the first circuit board; and the second flexible circuit board is respectively connected with the second circuit board and the first circuit board and used for realizing signal transmission between the second circuit board and the first circuit board, wherein a driving chip is arranged on the display panel and used for supplying image signals to the display panel. The display device is electrically connected with a first circuit board which is correspondingly connected with a display panel by a flexible circuit board through a second circuit board which is integrated with components, so that the occupied area of a bonding area of the second circuit board connected with an FPC is reduced, the size of the second circuit board is reduced, driving signals are transmitted through two stages of circuit boards, the components integrated on the first circuit board in the backlight module are avoided, the thickness of the first circuit board is reduced, and meanwhile, the layout requirements (safety space avoidance of the integrated components in the transverse direction and the longitudinal direction) of the bonding area connected with the FPC are reduced, so that the thickness of a metal layer in a frame of the backlight module is reduced, the transverse size of the frame of the backlight module is also reduced, the problem that the frame of the module in the existing display device is large can be solved, and the thinning and the narrowing of the frame of the backlight module are realized;
in addition, because of there is not components and parts on this first circuit board, effectively reduced its consumption and this first circuit board because of the influence that components and parts work produced heat, improved this display device's stability.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic view showing an FPC connection structure in a display device in the related art;
FIG. 2 is a schematic diagram showing the distribution of bonding areas to which an FPC is connected in the circuit board shown in FIG. 1;
FIG. 3 illustrates a layout diagram of gold fingers in the bonding area shown in FIG. 2;
fig. 4 is a schematic diagram illustrating an FPC connection relationship in a display device according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a partial structure of a backlight module in a display device according to an embodiment of the present invention in a thickness direction.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 4 is a schematic diagram illustrating a connection relationship between FPCs in a display device provided in an embodiment of the present invention, and fig. 5 is a schematic diagram illustrating a cross section of a partial structure of a backlight module in a thickness direction in the display device provided in an embodiment of the present invention, where it should be noted that, an internal structure of the display device shown in fig. 4 is not all given, and is only an illustration of a connection relationship between structures in the following text, and is not a limitation to a specific structural position of the present application.
Referring to fig. 4 and 5, an embodiment of the present invention provides a display device 200, where the display device 200 includes a display panel and a backlight module (not shown), and a first flexible circuit board 210 electrically connected between the display panel and the backlight module, where the first flexible circuit board 210 includes, but is not limited to, a flexible circuit board L1, a flexible circuit board L2, a flexible circuit board L3, and a flexible circuit board L4, and a second flexible circuit board mentioned below includes, but is not limited to, a flexible circuit board L5. It should be noted that, here, only by analogy with the prior art, a display device with 4 driving chips (not shown) is also taken as an example for description, and is not taken as a limitation of the present application, and in addition, other constituent structural components in the display device 200 can be understood by combining with the related art, and are not described herein again.
In this embodiment, the display device 200 further includes:
a first circuit board 221, which is provided with a first signal line inside and is disposed in the backlight module, and other components are not integrated on the first circuit board 221;
a second circuit board 222 for driving the display panel;
a first flexible circuit board 210, wherein the first flexible circuit board 210 is respectively connected with the display panel and the first circuit board 221, so as to realize signal transmission between the display panel and the first circuit board 221;
a second flexible circuit board L5, the second flexible circuit board L5 is connected with the second circuit board 222 and the first circuit board 221 respectively, for realizing the signal transmission between the second circuit board 222 and the first circuit board 221,
wherein a driving chip (not shown) is disposed on the display panel, and the driving chip is used for supplying an image signal to the display panel.
Further, the first signal line is various signal traces for transmitting driving signals, and the first circuit board 221 is only provided with the first signal line in a layout manner, and is free of integration of components, specifically, for example, a circuit board with a single-layer or multi-layer signal line layer.
Therefore, components are prevented from being integrated on the first circuit board 221 in the backlight module, the thickness of the first circuit board 221 is reduced, and meanwhile, the layout requirements (safety space avoidance of the integrated components in the transverse direction and the longitudinal direction) of a bonding area for connecting the FPC are reduced, so that the thickness of a frame of the backlight module is reduced, the transverse size of the frame of the backlight module is also reduced, the problem that the frame of the module in the existing display device is large can be solved, and the thinning of the backlight module and the narrowing of the frame are achieved.
The display panel is a liquid crystal panel including an array substrate 202 and a color filter substrate (not shown) facing each other, a sealing member (not shown) for bonding the array substrate 202 and the color filter substrate, and a liquid crystal layer (not shown) sealed between the array substrate 202 and the color filter substrate, wherein the array substrate 202 has an extending portion (not shown) extending outward at least on one side in a substrate plane extending direction, and a set of panel terminals 2021 is provided on one surface of the extending portion, and one side of the set of panel terminals 2021 is directly or indirectly connected to a second signal line provided in the display panel, the second signal line being a data line and/or a scanning line.
For example, a plurality of signal lines (second signal lines) extending in a first direction on the surface of the substrate and in a second direction perpendicular to the first direction are provided in a region of the array substrate 202 facing the color filter substrate. In the array substrate 202, a portion where the plurality of signal lines intersect with each other corresponds to a minimum unit of display (i.e., a pixel). The entire display region is formed by arranging a plurality of the pixels in a matrix.
In other embodiments of the present invention, the display panel is not limited to a liquid crystal panel, and for example, the display panel may be an organic Electro Luminescence (EL) panel or an electrophoretic display.
Further, the other sides of the set of panel terminals 2021 are respectively connected to the first ends of the first flexible circuit boards 210(L1, L2, L3, and L4).
Further, the first circuit board 221 is provided with first bonding regions (not shown) that are respectively connected to the second ends of the first flexible circuit board 210(L1, L2, L3, and L4).
Further, a second bonding region (not shown) is also provided on the first circuit board 221, and is connected to the aforementioned second circuit board 222 through a second flexible circuit board L5.
In this embodiment, although not shown in the drawings, the bonding area and the second bonding area may be understood by combining the distribution schematic of the bonding area connected to the FPC on the circuit board shown in fig. 2 according to the related art, and the number and the position interval of the distribution may be reasonably arranged according to the actual application requirements and the requirements of the display size and the performance of the display panel, which is not limited herein.
Further, the first bonding region on the first circuit board 221 and the second end of the first flexible circuit board 210(L1, L2, L3, and L4) are respectively connected by an Anisotropic Conductive Film (ACF), and the set of panel terminals 2021 and the first end of the first flexible circuit board 210(L1, L2, L3, and L4) are respectively connected by an ACF.
According to the related art, the anisotropic conductive film is a polymer film having three functions of conductivity, insulation, and adhesion, and after thermocompression bonding, the anisotropic conductive film has conductivity in the film thickness direction and insulation in the film surface direction, and can simultaneously perform permanent bonding of the counter electrode portion, conductivity between the electrodes, and insulation between the electrode patterns. And aligning the electrode substrates to be connected, and after hot pressing, pressing the conductive particles between the electrodes to be contacted with the upper and lower electrodes so as to realize electrode connection. The thickness of the Tape is only about 20 microns, and the Tape is not compressed, so that the periphery of the conductive particles is still surrounded by the insulating adhesive, and the conductive effect is not achieved.
Further, in this embodiment, referring to fig. 5, the frame 204 of the backlight module further includes a metal layer 203 (e.g., an iron member), the metal layer 203 is used for assembling the first circuit board 221, and specifically, the metal layer 203 has a plurality of slits (not shown), the slits are disposed from one side of the metal layer 203 in the thickness direction toward a bonding area on the first circuit board 221 and respectively serve as channels for the first flexible circuit board (L1, L2, L3, and L4) and the second flexible circuit board L5. Therefore, the assembly size of the flat cable of the flexible circuit board can be effectively reduced, the risk of broken lines and broken lines caused by overlong flat cable assembly path is avoided, the stability is improved, and meanwhile, the manufacturing cost of the flexible circuit board can be saved to a certain extent.
Further, a wire storage groove (not shown) is formed in the metal layer 203 in a region close to the slit, and the wire storage groove can be used for accommodating the reserved bent portion of the flexible circuit board. Therefore, the pre-bending part of the flexible circuit board flat cable is stored when the flexible circuit board flat cable is assembled, the crease pressing risk caused by the overlong flat cable is avoided, and the influence caused by insufficient inspection and maintenance space due to the excessively short flat cable of the reserved flexible circuit board is avoided when the metal layer 203 is disassembled for line inspection in the later maintenance period.
To sum up, the embodiment of the present invention provides a display device 200, including display panel and backlight module, and this display device 200 still includes: a first circuit board 221 having only a first signal line built therein, and disposed in the backlight module; a second circuit board 222 for driving the display panel; a first flexible circuit board 210, wherein the first flexible circuit board 210 is respectively connected with the display panel and the first circuit board 221, so as to realize signal transmission between the display panel and the first circuit board 221; and a second flexible circuit board L5, where the second flexible circuit board L5 is connected to the second circuit board 222 and the first circuit board 221 respectively, so as to implement signal transmission between the second circuit board 222 and the first circuit board 221, and a driving chip is disposed on the display panel and used for supplying image signals to the display panel. The display device 200 utilizes a flexible circuit board L5 to electrically connect with a first circuit board 221 correspondingly connected with a display panel (array substrate 202) through a second circuit board 222 integrated with components, thereby reducing the occupied area of a bonding area of the second circuit board 222 connected with an FPC, reducing the size of the second circuit board 222, and transmitting a driving signal through two stages of circuit boards, avoiding the components integrated on the first circuit board 221 in the backlight module, reducing the thickness of the first circuit board 221, and simultaneously reducing the layout requirement of the bonding area connected with the FPC (safe space avoidance of the integrated components in the transverse direction and the longitudinal direction), thus not only reducing the thickness of the metal layer 203 in the backlight module frame 204 after assembly, but also reducing the transverse size of the backlight module frame 204, thereby improving the problem of larger module frame in the existing display device, the thinning of the backlight module and the narrowing of the frame are realized;
in addition, since there are no components on the first circuit board 221, the power consumption thereof is effectively reduced, and the influence of heat generated by the first circuit board 221 due to the operation of the components is effectively reduced, thereby improving the stability of the display device 200.
Further, the first circuit board 221 is embedded in the metal layer 203 and disposed in a sidewall opposite to the board surface of the first circuit board 221, so as to further reduce the thickness of the module frame 204 when the first circuit board 221 is assembled.
It should be noted that in the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", and the like, indicate positional or positional relationships for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Further, in this document, the contained terms "include", "contain" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, a method, an article or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a display device, display device includes display panel and backlight unit, its characterized in that, display device still includes:
the first circuit board is internally provided with a first signal wire and is arranged in the backlight module;
a second circuit board for driving the display panel;
the first flexible circuit board is respectively connected with the display panel and the first circuit board and is used for realizing signal transmission between the display panel and the first circuit board;
a second flexible circuit board connected with the second circuit board and the first circuit board respectively for realizing signal transmission between the second circuit board and the first circuit board,
the display panel is provided with a driving chip, and the driving chip is used for supplying image signals to the display panel.
2. The display device according to claim 1, wherein the display panel comprises an array substrate and a color filter substrate which are opposed to each other, and a liquid crystal layer enclosed between the array substrate and the color filter substrate, the array substrate has an outwardly extending portion on at least one side in a planar extending direction, and a panel terminal is provided on one surface of the extending portion, one side of the panel terminal being directly or indirectly connected to a second signal line provided in the display panel,
the second signal line is a data line and/or a scanning line.
3. The display device according to claim 2, wherein the other sides of the panel terminals are respectively connected to the first ends of the first flexible circuit boards.
4. The display device of claim 2, wherein the first circuit board has a first bonding area disposed thereon,
the bonding areas are respectively and correspondingly connected with the second ends of the first flexible circuit boards.
5. The display device of claim 4, wherein a second bonding area is further disposed on the first circuit board,
the second bonding area is connected with the second circuit board through the second flexible circuit board.
6. The display device according to claim 1, wherein the frame of the backlight module further comprises a metal layer for assembling the first circuit board,
the metal layer is provided with a plurality of slits which are arranged from one side of the thickness direction of the metal layer to the bonding area on the first circuit board and are respectively used as channels of the first flexible circuit board and the second flexible circuit board.
7. The display device according to claim 6, wherein a wire storage groove is formed in a region of the metal layer adjacent to the slit, and the wire storage groove is used for accommodating a reserved bent part of the flexible circuit board.
8. The display device according to claim 7, wherein the first circuit board is embedded in the metal layer and disposed in a side wall opposite to a board surface of the first circuit board.
9. The display device according to claim 1, wherein no other components are integrated on the first circuit board.
10. The display device according to claim 4, wherein the first bonding region on the first circuit board and the second end of the first flexible circuit board are connected by an anisotropic conductive film, respectively, and the panel terminal and the first end of the first flexible circuit board are connected by an anisotropic conductive film, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022545971.8U CN213903994U (en) | 2020-11-06 | 2020-11-06 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022545971.8U CN213903994U (en) | 2020-11-06 | 2020-11-06 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213903994U true CN213903994U (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022545971.8U Active CN213903994U (en) | 2020-11-06 | 2020-11-06 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213903994U (en) |
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2020
- 2020-11-06 CN CN202022545971.8U patent/CN213903994U/en active Active
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