CN111243448A - Display module and display screen - Google Patents
Display module and display screen Download PDFInfo
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- CN111243448A CN111243448A CN202010208754.1A CN202010208754A CN111243448A CN 111243448 A CN111243448 A CN 111243448A CN 202010208754 A CN202010208754 A CN 202010208754A CN 111243448 A CN111243448 A CN 111243448A
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- middle frame
- 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
- G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
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Abstract
The invention discloses a display module and a display screen, relates to the technical field of display equipment, and aims to solve the problem that the arrangement scheme of the display module cannot meet the requirement of a spliced screen with extremely narrow spliced seams. The display module of the invention comprises: a back plate, the back plate being in a flat plate shape; the middle frame is arranged at the edge of the back plate, a light mixing area is formed by the middle frame and the back plate in a surrounding mode, and an accommodating cavity is formed in one side, away from the light mixing area, of the middle frame; a mounting structure; the driving circuit board is fixed in the accommodating cavity through the mounting structure; the display panel is arranged on the middle frame and is electrically connected with the driving circuit board; and the adhesive layer is respectively bonded with the edge of the display panel and the side face, far away from the light mixing area, of the middle frame along the direction perpendicular to the display panel.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a display module and a display screen.
Background
With the progress of the technological level, the spliced screen gradually develops towards the direction of extremely narrow abutted seams, from the initial 5.9mm wide abutted seam, to the current 3.9mm narrow abutted seam, and then to the 0.99mm extremely narrow abutted seam to be appeared, and the reduction of the abutted seam each time means an innovation of a supporting and protecting structure in the display module. Due to the reduction of the splicing seams between the spliced screens, the design allowance of the supporting and protecting structure in the display module is compressed.
Fig. 1 is a partial cross-sectional schematic view of a display module in a prior art spliced screen, the display module of the spliced screen includes a display panel 01 and a backlight module, wherein, the backlight module includes a back plate 02, a middle frame 04, conductive foam 05, a driving circuit board 06 and a front frame 07, the middle frame 04 is located between the back plate 02 and the display panel 01, a bar-shaped mounting groove extending towards the display panel 01 is arranged on the middle frame 04, the end of the back plate 02 is inserted into the bar-shaped mounting groove to realize connection of the two, the middle frame 04 and the back plate 02 are surrounded to form a light mixing area 03, the conductive foam 05 is respectively bonded with the outer side of the back plate 02, the driving circuit board 06 is bonded, the front frame 07 is arranged on the middle frame 04, the outer side of the driving circuit board 06, and the folded edge.
Because preceding frame 07 is installed in the outside of center 04 and driver circuit board 06, protects driver circuit board 06 through preceding frame 07, and when the concatenation display screen, the lock forms the piece of broad at the preceding frame 07 hem of display panel 01 upper surface, leads to the display module assembly design that the arrangement scheme of current display module assembly only is applicable to 5.9mm or 3.9mm piece, can not satisfy the concatenation screen demand of current extremely narrow piece.
Disclosure of Invention
The invention provides a display module and a display screen, which are used for solving the problem that the arrangement scheme of the display module in the prior art cannot meet the requirement of a spliced screen with extremely narrow spliced seams.
In order to achieve the purpose, the invention adopts the following technical scheme:
a display module, comprising: a back plate, the back plate being in a flat plate shape; the middle frame is arranged at the edge of the back plate, a light mixing area is formed by the middle frame and the back plate in a surrounding mode, and an accommodating cavity is formed in one side, away from the light mixing area, of the middle frame; a mounting structure; the driving circuit board is fixed in the accommodating cavity through the mounting structure; the display panel is arranged on the middle frame and is electrically connected with the driving circuit board; and the adhesive layer is respectively bonded with the edge of the display panel and the side face, far away from the light mixing area, of the middle frame along the direction perpendicular to the display panel.
Further, still include: the conductive foam is located between the driving circuit board and the inner wall of the accommodating cavity and attached to the driving circuit board and the inner wall of the accommodating cavity.
Further, the mounting structure is detachably connected with the middle frame.
Further, seted up first card hole on the center, mounting structure includes: the mounting plate is bent to form a mounting cavity, and the driving circuit board is clamped in the mounting cavity; the jack catch, the jack catch sets up the outside of mounting panel, first calorie of hole with jack catch cooperation joint.
Further, the cross-section of jack catch is circular, first calorie of hole is circular calorie of hole, the second card hole has been seted up on the center, mounting structure still includes: the limiting column is arranged on the outer side of the mounting plate, and the second clamping hole is connected with the limiting part in a matched mode.
Furthermore, the mounting structure has a plurality ofly, seted up a plurality ofly on the center the first card hole, a plurality ofly first card hole is followed the limit extending direction interval of center sets up.
Further, the accommodating cavity has an opening on a side away from the light mixing area, and further includes: the protection plate covers the opening of the containing cavity and is connected with the middle frame.
Further, the glue layer is a conductive glue layer.
Furthermore, the value range of the wall thickness of the mounting plate is 1.0-1.5 mm.
Furthermore, the height of the limiting column ranges from 2.0 mm to 3.0 mm.
The embodiment of the invention also comprises a display screen which comprises the display module in the technical scheme.
The display module and the display screen provided by the embodiment of the invention comprise a back plate, a middle frame, a mounting structure, a driving circuit board, a display panel and a glue layer, and the arrangement scheme is as follows: the backplate is dull and stereotyped shape, and the border department at the backplate is installed to the center, and the center encloses into with the backplate and mixes the light zone, and one side that the light zone was kept away from to the center is formed with and holds the chamber, and drive circuit board passes through mounting structure to be fixed and holds the intracavity, and the glue film is kept away from one side surface bonding of mixing the light zone with the border of display panel, center respectively along the direction of perpendicular to display panel, realizes that display panel and center are further fixed, seal the outside face between them simultaneously. Compared with the arrangement scheme of the display module in the prior art, the glue layer in the display module in the embodiment of the invention replaces the front frame at the edge of the display panel in the prior art, and the flat backboard is connected with one side edge of the middle frame, so that on the basis of not increasing the thickness of the edge supporting structure of the current display module and ensuring various design functions (such as structural strength), a larger installation space is arranged between the middle frame and the glue layer, the installation space forms the accommodating cavity, the driving circuit board can be installed in the accommodating cavity, and when the display screen of the display module in the embodiment of the invention is adopted for splicing, the glue layer is only bonded at the edge of the display panel, and the upper surface of the display panel is not shielded, so that the display screen can form an extremely narrow spliced seam; and because the drive circuit board passes through mounting structure to be fixed in holding the intracavity, the joint strength of drive circuit board and center is higher, can have better fixed effect to drive circuit board to reduce the defective rate of drive circuit board in equipment and transportation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic partial cross-sectional view of a display module in a prior art tiled display screen;
FIG. 2 is a schematic structural diagram of a display module according to an embodiment of the invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a display module according to an embodiment of the invention;
FIG. 5 is an enlarged view of portion B of FIG. 4;
FIG. 6 is a schematic partial cross-sectional view of a conductive foam in a display module according to an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a mounting structure in a display module according to an embodiment of the invention;
fig. 8 is a second schematic structural diagram of a mounting structure in a display module according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should 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; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, "and/or" is only one kind of association relationship describing an association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Referring to fig. 2 to 6, a display module 100 according to an embodiment of the present invention includes a display panel 1 and a backlight module 2, where the backlight module 2 includes a back plate 21, a middle frame 23, a driving circuit board 25, a glue layer 26, and a mounting structure 27, the back plate 21 is a flat plate, the middle frame 23 is mounted at an edge of the back plate 21, the middle frame 23 and the back plate 21 enclose a light mixing region 22, an accommodating cavity 230 is formed at a side of the middle frame 23 away from the light mixing region 22, the driving circuit board 25 is fixed in the accommodating cavity 230 through the mounting structure 27, the display panel 1 is mounted on the middle frame 23 and electrically connected to the driving circuit board 25, and the glue layer 26 is respectively bonded to the edge of the display panel 1 and a side of the middle frame 23 away from the light mixing region 22.
The display module 100 provided by the embodiment of the invention comprises a display panel 1 and a backlight module 2, wherein the backlight module 2 comprises a back plate 21, a middle frame 23, a driving circuit board 25, an adhesive layer 26 and a mounting structure 27, and the arrangement scheme is as follows: the back plate 21 is flat, the middle frame 23 is installed at the edge of the back plate 21, the middle frame 23 and the back plate 21 enclose a light mixing area 22, an accommodating cavity 230 is formed at one side of the middle frame 23 away from the light mixing area, the driving circuit board 25 is fixed in the accommodating cavity 230 through the installation structure 27, and the adhesive layer 26 is respectively bonded with the edge of the display panel 1 and the surface of one side of the middle frame 23 away from the light mixing area 22 along the direction perpendicular to the display panel 1, so that the further fixation of the display panel 1 and the middle frame 23 is realized, and the outer side faces of the display panel 1 and the outer side faces of. Compared with the arrangement scheme of the display module in the prior art, the glue layer 26 in the display module in the embodiment of the invention replaces the front frame at the edge of the display panel 1 in the prior art, and the flat backboard 21 is connected with one side edge of the middle frame 23, so that on the basis of not increasing the thickness of the edge support structure of the current display module and ensuring various design functions (such as structural strength), a larger installation space is arranged between the middle frame 23 and the glue layer 26, the installation space forms the accommodating cavity 230, the driving circuit board 25 can be installed in the accommodating cavity 230, and when the display screen of the display module in the embodiment of the invention is spliced, the glue layer 26 is only bonded at the edge of the display panel 1, and the upper surface of the display panel 1 is not shielded, so that the display screen can form an extremely narrow spliced seam; and because the driving circuit board 25 is fixed in the accommodating cavity 230 through the mounting structure 27, the connection strength of the driving circuit board 25 and the middle frame 23 is high, and the driving circuit board 25 can be well fixed, so that the reject ratio of the driving circuit board 25 in assembly and transportation is reduced.
Based on the above embodiments, in some embodiments of the present invention, the display module further includes a conductive foam 24, the conductive foam 24 is located between the driving circuit board 25 and the inner wall of the accommodating cavity 230, and the conductive foam 24 is attached to both the driving circuit board 25 and the inner wall of the accommodating cavity 230, the conductive foam 24 can conduct the Static electricity of the driving circuit board 25 to the middle frame 23 and then to the back plate 21, and then the Static electricity is released through the ground line of the back plate 21 of the complete machine, so as to implement ESD (Electro-Static Discharge, electrostatic protection).
In some possible embodiments of the present invention, the mounting structure 27 is directly formed on the inner wall of the accommodating cavity 230 of the middle frame 23, and the mounting structure 27 is used for fixing the driving circuit board 25, i.e. the middle frame 23 and the mounting structure 27 are integrally manufactured, so as to simplify the assembling operation of the display module 100. In other possible embodiments of the present invention, the mounting structure 27 is detachably mounted in the accommodating cavity 230 of the middle frame 23, and if the mounting structure 27 in this solution is damaged during the assembly and disassembly of the driving circuit board 25, only the mounting structure 27 needs to be replaced, instead of replacing the whole middle frame 23, so that the maintenance cost is low.
Optionally, the mounting structure 27 has various schemes, for example, referring to fig. 4, 5, 7 and 8, the middle frame 23 is provided with a first clamping hole, the mounting structure 27 includes a mounting plate 271 and a clamping claw 272, the mounting plate 271 is bent to form a mounting cavity 2710, and the driving circuit board 25 is clamped in the mounting cavity 2710; the jack catch 272 sets up in the outside of mounting panel 271, and first calorie of hole cooperates the joint with jack catch 272, and drive circuit board 25 joint promptly is in the installation cavity 2710 that mounting panel 271 formed, and the mounting panel 271 passes through the cooperation in jack catch 272 and first calorie of hole, realizes being connected with center 23, and simple structure workable, low cost, and installation operation is simpler to the mounting panel 271 can form effectual protection to drive circuit board 25. For another example, the mounting structure 27 includes mounting slots formed by splicing a plurality of mounting plates 271, the driving circuit board 25 is clamped in the mounting cavity 2710, one of the mounting plates 271, which is close to the inner wall of the mounting cavity 2710 of the middle frame 23, is fixedly connected with the middle frame 23 through screws, and the connection strength between the mounting structure 27 and the middle frame 23 is high. Of course, the form of the mounting plate 271 forming the mounting cavity 2710 can be replaced by mutually bonding a plurality of mounting plates 271; the claw 272 may be disposed in the mounting cavity 2710 of the middle frame 23, and accordingly, the first engaging hole is formed in the mounting plate 271.
Optionally, the structure of the claw 272 may be various, such as that the claw 272 is a U-shaped claw 272 formed by two elastic arms, and the first clamping hole is in a straight shape; alternatively, the claw 272 has a circular cross section, and accordingly, the first engaging hole is a circular engaging hole. For the latter solution, since the claw 272 can rotate along the circumferential direction to drive the driving circuit board 25 to rotate, in some embodiments of the present invention, the mounting structure 27 further includes a limiting pillar 273, the limiting pillar 273 is disposed at the outer side of the mounting plate 271, the middle frame 23 is provided with a second fastening hole 231, the second fastening hole 231 is connected to the limiting pillar 273 in a matching manner, and after the first fastening hole is connected to the claw 272 in a matching manner and the second fastening hole 231 is connected to the limiting pillar 273 in a matching manner, the claw 272 is limited from rotating freely in the first fastening hole due to the matching connection of the second fastening hole 231 and the limiting member.
In order to ensure the protection strength of the driving circuit board 25, when only one mounting structure 27 is disposed on one edge of the middle frame 23, the length of the mounting cavity 2710 formed by the mounting plate 271 is required to be longer, which increases the manufacturing cost and the weight of the display module 100. In some possible embodiments of the present invention, there are a plurality of mounting structures 27, the middle frame 23 is provided with a plurality of first fastening holes, the plurality of first fastening holes are arranged at intervals along the extending direction of the edge of the middle frame 23, and the plurality of first fastening holes are matched with the plurality of mounting structures 27, so that not only the connection strength of the driving circuit board 25 is ensured, but also the cost is low.
It should be noted that: when the thickness of the display module 100 is small, the middle frame 23 cannot form the accommodating cavity 230 that satisfies the driving circuit board 25 in the direction perpendicular to the display panel 1, and therefore, the driving circuit board 25 needs to be installed in the installation structure 27, and then the installation structure 27 needs to be installed in the accommodating cavity 230 in an inclined manner. In addition, the first and second locking holes 231 may be replaced by a locking slot structure according to the specific structure of the middle frame 23.
Considering that the protection effect of the glue layer 26 on the PCB is weak in the arrangement scheme of the display module 100, the driving circuit board 25 needs to be further protected. Alternatively, the accommodating cavity 230 formed in the middle frame 23 is an accommodating cavity 230 adapted to the driving circuit board 25 and the mounting structure 27, and a wall surface of the accommodating cavity 230 on a side far from the light mixing region 22 can directly protect the driving circuit board 25. Optionally, the accommodating cavity 230 has an opening on a side away from the light mixing region 22, the display module 100 further includes a protection plate 28, the protection plate 28 covers the opening of the accommodating cavity 230 and is connected to the middle frame 23, the protection plate 28 protects the driving circuit board 25 on a side away from the light mixing region 22, the driving circuit board 25 is connected to the display panel 1 through the flexible circuit board 3, after the back plate 21 and the middle frame 23 are assembled, the mounting structure 27 enters the accommodating cavity 230 from the opening of the accommodating cavity 230 for mounting, and the driving circuit board 25 enters the accommodating cavity 230 from the opening and is connected to the mounting structure 27, and the operating space is relatively large.
Alternatively, the adhesive layer 26 may be an insulating adhesive layer or a conductive adhesive layer. The conductive adhesive layer can transmit static electricity on the display panel 1 to the back plate 21 through the middle frame 23 or the protective plate 28 and the middle frame 23, and finally the static electricity is released through a grounding circuit of the whole display device, so that the antistatic capacity of the display device is further improved. Specifically, the conductive adhesive layer is a conductive adhesive tape.
Based on the above embodiment, the display module 100 further includes the fastening member 4, the back plate 21 is connected to the middle frame 23 through the fastening member 4, as shown in fig. 6, not only is the connection strength between the back plate 21 and the middle frame 23 high, but also the mounting hole reserved in the middle frame 23 and matched with the fastening member 4 does not occupy a large area, so that the middle frame 23 can form a large accommodating cavity 230, and the mounting of the driving circuit board 25 is ensured. Similarly, the protection plate 28 is also connected with the middle frame 23 by the fastener 4, and the connection strength is high. In particular, the above-mentioned fasteners 4 may each be a screw.
Based on the above embodiment, the backlight module 2 further includes the limiting structures 29, and the limiting structures 29 are installed at two ends of the accommodating cavity 230 along the length direction and can limit the movement of the driving circuit board 25 along the length direction. Alternatively, the position limiting structure 29 may be a position limiting column or a position limiting barrier.
According to the installation requirements of the existing extremely narrow abutted seam, there is a certain limitation to the size of the installation structure 27. When the wall thickness D of the mounting plate 271 is too thick, the mounting and dismounting of the driving circuit board 25 is inconvenient; when the wall thickness D of the mounting plate 271 is too thin, the mounting structure 27 has low clamping strength to the driving circuit board 25. Therefore, the value range of the wall thickness D of the mounting plate 271 in the embodiment of the present invention is 1.0 to 1.5mm, as shown in fig. 8, which not only can ensure the clamping strength of the mounting structure 27 to the driving circuit board 25, but also can facilitate the mounting and dismounting of the driving circuit board 25.
Similarly, if the height H of the limiting column 273 is too high, the mounting structure 27 is inconvenient to disassemble and assemble; if the height H of the limiting column 273 is too low, the clamping strength between the mounting structure 27 and the middle frame 23 is low. Therefore, the value range of the height H of the limiting column 273 in the embodiment of the invention is 2.0-3.0 mm, as shown in FIG. 7, the clamping strength of the mounting structure 27 and the middle frame 23 can be ensured, and the mounting structure 27 is convenient to disassemble and assemble.
Alternatively, the mounting structure 27 may be made of a metal material or an injection molding material. The mounting structure 27 in the embodiment of the invention is made of injection molding materials, and has the advantages of low price, light weight and good elasticity. Specifically, one or more of PC (Polycarbonate), PS (General Purpose Polystyrene) and PAAM (Polyacrylamide) may be used as the mounting structure 27, and the color of the mounting structure 27 is black or white. In addition, the middle frame 23 and the protection plate 28 may be made of metal materials.
The embodiment of the invention also comprises a display screen which comprises the display module 100 in the technical scheme. Because the display module adopted in the display screen in the embodiment of the invention has the same structure as the display module 100 in the technical scheme, the display screen in the embodiment of the invention can obtain the same technical effect.
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 above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A display module, comprising:
a back plate, the back plate being in a flat plate shape;
the middle frame is arranged at the edge of the back plate, a light mixing area is formed by the middle frame and the back plate in a surrounding mode, and an accommodating cavity is formed in one side, away from the light mixing area, of the middle frame;
a mounting structure;
the driving circuit board is fixed in the accommodating cavity through the mounting structure;
the display panel is arranged on the middle frame and is electrically connected with the driving circuit board;
and the adhesive layer is respectively bonded with the edge of the display panel and the side face, far away from the light mixing area, of the middle frame along the direction perpendicular to the display panel.
2. The display module of claim 1, further comprising:
the conductive foam is located between the driving circuit board and the inner wall of the accommodating cavity and attached to the driving circuit board and the inner wall of the accommodating cavity.
3. The display module assembly of claim 1, wherein the mounting structure is removably coupled to the center frame.
4. The display module assembly of claim 3, wherein the middle frame has a first locking hole formed thereon, and the mounting structure comprises:
the mounting plate is bent to form a mounting cavity, and the driving circuit board is clamped in the mounting cavity;
the jack catch, the jack catch sets up the outside of mounting panel, first calorie of hole with jack catch cooperation joint.
5. The display module assembly of claim 4, wherein the cross-section of the clamping jaw is circular, the first clamping hole is a circular clamping hole, the middle frame is provided with a second clamping hole, and the mounting structure further comprises:
the limiting column is arranged on the outer side of the mounting plate, and the second clamping hole is connected with the limiting part in a matched mode.
6. The display module assembly according to claim 4, wherein the mounting structure has a plurality of first engaging holes, and the plurality of first engaging holes are spaced apart from each other along a direction in which the side of the middle frame extends.
7. The display module of claim 1, wherein the accommodating cavity has an opening on a side away from the light mixing area, further comprising:
the protection plate covers the opening of the containing cavity and is connected with the middle frame.
8. The display module of claim 1, wherein the glue layer is a conductive glue layer.
9. The display module assembly of claim 5, wherein the wall thickness of the mounting plate ranges from 1.0 mm to 1.5mm, and the height of the limiting column ranges from 2.0 mm to 3.0 mm.
10. A display screen, characterized by comprising the display module set of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208754.1A CN111243448A (en) | 2020-03-23 | 2020-03-23 | Display module and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208754.1A CN111243448A (en) | 2020-03-23 | 2020-03-23 | Display module and display screen |
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| CN111243448A true CN111243448A (en) | 2020-06-05 |
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| CN202010208754.1A Pending CN111243448A (en) | 2020-03-23 | 2020-03-23 | Display module and display screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113345340A (en) * | 2021-08-06 | 2021-09-03 | 惠科股份有限公司 | Display screen and spliced display screen |
| WO2022068381A1 (en) * | 2020-09-30 | 2022-04-07 | 京东方科技集团股份有限公司 | Curved display module and display device |
| WO2022116658A1 (en) * | 2020-12-02 | 2022-06-09 | 海信视像科技股份有限公司 | Display device |
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