Large-size display screen and production process thereof

Abstract

The invention provides a large-size display screen and a production process thereof. The process comprises the following steps: S1, pasting mylar on a back plate: pasting mylar on three edges of the back plate respectively for edge covering treatment; s2, easy-to-pull glue is attached to the back plate, wherein the easy-to-pull glue is attached to the front face of the back plate; s3, covering a glass substrate; s4, fixing a PCB (Printed Circuit Board) of a lamp panel: fixing the PCB of the Mini LED glass substrate on the back surface of the back plate; s5, a lamp panel iron cover is locked; s6, pressing strip mounting; s7, pasting a silica gel pad; s8, screen projection and wire insertion: a lighting patch cord is inserted into the PCB; s9, a diffusion plate is installed; and S10, assembling the diaphragm to obtain the backlight assembly. According to the invention, large-size Mini backlight display screens supporting partition brightness regulation and control can be efficiently produced in batches, and the requirement of partition control of the display screens is met.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a large-size display screen and a production process thereof. Background Art

[0002] Most current display products are backlit by LED light strips, which have fewer LED beads and are unevenly distributed. At the same time, the only way to adjust the brightness of LED light strips is to adjust the current. The same working current of the LED lights has the same brightness. Therefore, it is impossible to control the switch and brightness of each partition separately. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a large-size display screen and a production process thereof, which can realize batch and efficient production of large-size Mini backlight display screens that support zone brightness control.

[0004] In order to solve the above technical problems, the first technical solution adopted by the present invention is:

[0005] A large-size display screen production process comprises the following steps:

[0006] S1: Mylar tape on the back panel: The three sides of the back panel are respectively pasted with Mylar tape for edge wrapping;

[0007] S2: Attach easy-to-pull adhesive tape to the back panel: Attach easy-to-pull adhesive tape to the front of the back panel;

[0008] S3: Cover glass substrate: The Mini LED glass substrate is attached to the front side of the backplane by a glass substrate limiting jig;

[0009] S4: Fixing the light board PCB board: fixing the PCB board of the Mini LED glass substrate on the back side of the back plate;

[0010] S5: Lock the light board iron cover: attach two or more silicone pads on the ground side of the back panel;

[0011] S6: Installing the pressure strips: Install a pressure strip on each of the four sides of the back panel;

[0012] S7: Attaching silicone pads: Attach silicone pads on both sides of each pressure strip;

[0013] S8: Screen projection wiring: insert the lighting adapter wire on the PCB board;

[0014] S9: Installing a diffusion plate: Installing a diffusion plate on the Mini LED glass substrate, and the diffusion plate cannot be pressed onto the silicone pads on both sides of the pressure strip on the back panel;

[0015] S10: Film assembly: a quantum film and a COPP film are respectively installed on the diffusion plate to obtain a backlight assembly.

[0016] Optionally, the method further comprises the following steps:

[0017] S11: Backlight inspection: lighting up the backlight assembly to detect whether there is any foreign matter on the Mini LED glass substrate;

[0018] S12: Fixing the middle frame: using the middle frame to fix the backlight assembly;

[0019] S13: Cover glass: attaching the glass to the middle frame to obtain a machine platform;

[0020] S14: Turning over the machine: turning the machine over to the back and unplugging the lighting adapter cable;

[0021] S15: PCB board fixing: attaching EVA and conductive foam between the PCB board and the back plate.

[0022] Optionally, the method further comprises the following steps:

[0023] S16: MES code scanning: scan the screen barcode and glass barcode respectively and upload them to the MES system;

[0024] S17: Lock the ground side screws: install an iron cover on the PCB board, and fix it with screws on the ground side of the backplane;

[0025] S18: Locking iron cover screws: Lock the iron cover on the PCB board with screws;

[0026] S19: Attaching conductive cloth and Mylar: Attaching conductive cloth to the lower left corner and the lower right corner of the glass respectively, and attaching insulating Mylar between the ground side of the glass and the iron cover.

[0027] Optionally, in S17, four screws are fastened to the ground of the back panel; in S18, four screws are fastened to the PCB board to fix the iron cover; in S19, a conductive cloth is attached to the lower left corner and the lower right corner of the glass respectively.

[0028] Optionally, in S2, 8 strips of easy-to-pull adhesive are attached to the front side of the back panel.

[0029] Optionally, in S4, the PCB board is fixed to the back side of the back plate by EVA bonding.

[0030] Optionally, in S5, four silicone pads are attached to the ground side of the back panel.

[0031] Optionally, in S7, two silicone pads are attached to both sides of each pressure strip.

[0032] Another technical solution provided by the present invention is:

[0033] A large-size display screen is manufactured by the large-size display screen production process.

[0034] Optionally, the large-size display screen is a 31.5-inch display screen.

[0035] The beneficial effect of the present invention is that through the large-size display screen production process of the present invention, it is possible to efficiently mass-produce large-size display screens using Mini LED as backlight sources, meeting the needs of display screen partition control. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a process flow of a large-size display screen production process provided by an embodiment of the present invention;

[0037] Figure 2 A complete schematic diagram of a large-size display screen production process provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0039] Please refer to Figure 1 as well as Figure 2 The present invention provides a large-size display screen production process, comprising the following steps:

[0040] S1: Mylar tape on the back panel: The three sides of the back panel are respectively pasted with Mylar tape for edge wrapping;

[0041] S2: Attach easy-to-pull adhesive tape to the back panel: Attach easy-to-pull adhesive tape to the front of the back panel;

[0042] S3: Cover glass substrate: The Mini LED glass substrate is attached to the front side of the backplane by a glass substrate limiting jig;

[0043] S4: Fixing the light board PCB board: fixing the PCB board of the Mini LED glass substrate on the back side of the back plate;

[0044] S5: Lock the light board iron cover: attach two or more silicone pads on the ground side of the back panel;

[0045] S6: Installing the pressure strips: Install a pressure strip on each of the four sides of the back panel;

[0046] S7: Attaching silicone pads: Attach silicone pads on both sides of each pressure strip;

[0047] S8: Screen projection wiring: insert the lighting adapter wire on the PCB board;

[0048] S9: Installing a diffusion plate: Installing a diffusion plate on the Mini LED glass substrate, and the diffusion plate cannot be pressed onto the silicone pads on both sides of the pressure strip on the back panel;

[0049] S10: Film assembly: a quantum film and a COPP film are respectively installed on the diffusion plate to obtain a backlight assembly.

[0050] From the above description, it can be seen that the beneficial effect of the present invention is that the above production process can realize efficient mass production of large-size display screens using Mini LED as backlight sources, meeting the needs of display screen partition control of brightness and switch status.

[0051] Furthermore, the method further comprises the following steps:

[0052] S11: Backlight inspection: lighting up the backlight assembly to detect whether there is any foreign matter on the Mini LED glass substrate;

[0053] S12: Fixing the middle frame: using the middle frame to fix the backlight assembly;

[0054] S13: Cover glass: attaching the glass to the middle frame to obtain a machine platform;

[0055] S14: Turning over the machine: turning the machine over to the back and unplugging the lighting adapter cable;

[0056] S15: PCB board fixing: attaching EVA and conductive foam between the PCB board and the back plate.

[0057] It can be seen from the above description that the above-mentioned backlight assembly frame fixing process can well protect the backlight assembly, isolate dust, and improve the overall lifespan.

[0058] Furthermore, the method further comprises the following steps:

[0059] S16: MES code scanning: scan the screen barcode and glass barcode respectively and upload them to the MES system;

[0060] S17: Lock the ground side screws: install an iron cover on the PCB board, and fix it with screws on the ground side of the backplane;

[0061] S18: Locking iron cover screws: Lock the iron cover on the PCB board with screws;

[0062] S19: Attaching conductive cloth and Mylar: Attaching conductive cloth to the lower left corner and the lower right corner of the glass respectively, and attaching insulating Mylar between the ground side of the glass and the iron cover.

[0063] Furthermore, in S17, four screws are fastened on the ground of the back panel; in S18, four screws are fastened on the PCB board to fix the iron cover; in S19, a conductive cloth is attached to the lower left corner and the lower right corner of the glass respectively.

[0064] It can be seen from the above description that the above-mentioned backlight assembly finishing and fixing process can provide further protection.

[0065] Furthermore, in S2, 8 strips of easy-to-pull adhesive are attached to the front side of the back panel.

[0066] Furthermore, in S4, the PCB board is fixed to the back side of the back plate by EVA bonding.

[0067] Furthermore, in S5, four silicone pads are attached to the ground side of the back panel.

[0068] Furthermore, in S7, two silicone pads are attached to both sides of each pressure strip.

[0069] It can be seen from the above description that by further limiting the number of fixing members and adhesive members, it is possible to ensure that the backlight module has the best stability performance.

[0070] Another technical solution provided by the present invention is:

[0071] A large-size display screen is manufactured by the large-size display screen production process.

[0072] Furthermore, the large-size display screen is a 31.5-inch display screen.

[0073] From the above description, it can be seen that the large-size display screen produced by the large-size display screen production process uses a Mini LED glass substrate to replace the traditional LED light strip as the backlight source of the LCD panel, thereby being able to individually control the switch, brightness and other states of each partition lamp bead in the display screen.

[0074] Embodiment 1

[0075] Please refer to Figure 1 This embodiment provides a large-size display screen production process, which includes the following steps:

[0076] S1: Back panel with Mylar:

[0077] The three sides of the back plate are respectively covered with Mylar for edge treatment, and black Mylar is preferably used.

[0078] This step can not only reduce the friction between the middle frame and the back panel, thus reducing the presence of foreign matter, but also prevent light leakage.

[0079] S2: Back panel with easy-to-pull adhesive:

[0080] A pull-tab adhesive strip is attached to the front of the back panel, preferably 8 pull-tab adhesive strips are attached.

[0081] Here, the easy-to-pull adhesive is not only used for pasting the glass substrate in the subsequent step, but also can be removed by pulling the easy-to-pull adhesive, so that the glass substrate can be removed efficiently and conveniently.

[0082] S3: Cover glass substrate:

[0083] Insert the glass substrate limiting jig into the three sides of the back panel for limiting and fixing, then use the suction cup jig to absorb the glass substrate, and then place the Mini LED glass substrate into the back panel according to the glass substrate limiting jig, and press and fix it with a dust-free cloth so that the glass substrate is adhered to the front of the back panel through the easy-pull adhesive.

[0084] In this step, the Mini LED glass substrate is used to replace the traditional LED light strip as the backlight source of the LCD panel.

[0085] S4: Fix the light board PCB:

[0086] The PCB board of the Mini LED glass substrate is fixed on the back side of the back plate. Preferably, the PCB board is fixed on the back side of the back plate by EVA.

[0087] S5: Locking lamp plate iron cover:

[0088] Two or more silicone pads are attached to the ground side of the back plate, preferably four silicone pads are attached.

[0089] This step can help prevent the iron cover of the lamp panel installed later from deforming and causing light leakage problems.

[0090] S6: Installing the layer strip:

[0091] Install a pressure strip on each of the four sides of the back panel.

[0092] Here, a pressure strip is installed corresponding to each edge, which can play a good role in supporting the diffuser plate in the subsequent diffuser plate installation step.

[0093] S7: Silicone pad:

[0094] A silicone pad is attached to both sides of each layer strip, and preferably two silicone pads are attached to both sides of each layer strip.

[0095] Here, installing silicone pads on the left and right sides of the pressure strip can play a good role in limiting the diffusion plate in the subsequent diffusion plate installation steps.

[0096] S8: Screen projection plug:

[0097] Insert the lighting adapter cable into the PCB board of the glass substrate, and use an air gun to blow away the dust on the surface of the backplane assembly.

[0098] Here, by installing the lighting adapter cable, the backlight workstation only needs to simply connect and plug in the lighting adapter cable and the lighting cable of the lighting box, which can improve work efficiency and alleviate bottleneck workstations.

[0099] S9: Install the diffuser:

[0100] A diffusion plate is installed on the Mini LED glass substrate, and the diffusion plate cannot be pressed onto the silicone pads on both sides of the pressure strip on the back panel.

[0101] Through this step, the light can stay on the surface of the diffuser plate. When the light hits each light guide point, the reflected light will diffuse to every corner, and then destroy the reflection condition and be emitted from the front of the diffuser plate, thereby obtaining better lighting effect.

[0102] S10: Diaphragm assembly:

[0103] A quantum film and a COPP film are respectively installed above the diffusion plate to obtain a backlight assembly.

[0104] Here, the quantum film can use blue light LED to excite quantum dots to emit white light; the COPP film can have the effect of enhancing brightness.

[0105] The present embodiment provides a large-size display screen production process, which can realize batch and efficient production of Mini LED large-size display screens with a partition control lamp bead function, especially 31.5-inch Mini LED display screens; and the following production process can bring the following advantages:

[0106] (1) Reduce the number of foreign matter: The S1 backplane mylar process can reduce the friction between the middle frame and the backplane, which can reduce the number of foreign matter. At the same time, the diaphragm structure achieved by the S10 diaphragm assembly process can weaken foreign matter, greatly reducing the number of foreign matter.

[0107] (2) Improved maintenance efficiency: Different from the prior art that uses ordinary double-sided tape to fix the glass substrate, which is easy to damage the glass substrate when it is crooked and needs to be re-attached, this embodiment fixes the glass substrate through the back panel sticking easy-pull adhesive process of S2. The glass substrate can be removed safely and without damage by pulling the easy-pull adhesive, greatly reducing the risk of damage to the glass substrate;

[0108] (3) Improve light leakage: The S5 back panel has a silicone pad on the ground side, which can effectively alleviate the light leakage on the ground side.

[0109] (4) Improve work efficiency: Different from the prior art, the original backlight workstation inserts the light wire of the light box into the screen socket of the glass substrate for lighting, and the plug-in and unplug speed is too slow; this embodiment arranges S8 to insert the lighting station wiring on the glass substrate before the projection workstation. The backlight workstation only needs to simply connect and plug the lighting adapter wire and the light wire of the light box, which can significantly improve the work efficiency and alleviate the bottleneck of the workstation.

[0110] Embodiment 2

[0111] Please refer to Figure 2 This embodiment further expands on the basis of the first embodiment, specifically further supplements the subsequent steps of the large-size display screen production process described in the first embodiment, and provides a complete large-size display screen production process.

[0112] In this embodiment, after S10, the following steps are also included:

[0113] S11: Backlight check:

[0114] Light up the backlight assembly, detect whether there are foreign objects on the Mini LED glass substrate, and clean the foreign objects on the backlight.

[0115] S12: Card in frame:

[0116] Fix the entire backlight assembly with the middle frame to prevent foreign matter from entering the backlight assembly and prepare for the cover glass step.

[0117] S13: Cover glass:

[0118] The glass is attached to the middle frame according to the positioning of the middle frame to obtain the machine.

[0119] S14: Flip:

[0120] Turn the machine over to the back and unplug the lighting adapter cable;

[0121] S15: PCB board fixing:

[0122] EVA and conductive foam are attached between the PCB and the back plate; the PCB is turned over and attached to the back plate, so as to guide the static electricity of the glass into the back plate through the conductive foam.

[0123] At this point, the production process of the display screen is basically completed.

[0124] In some specific implementations, the following finishing steps are also performed for final fixation reinforcement.

[0125] S16: MES code scanning:

[0126] Scan the screen barcode and glass barcode separately and upload them to the MES system to facilitate subsequent traceability of product information.

[0127] S17: Ground screw:

[0128] An iron cover is installed on the PCB board, and is fixed by screws on the ground side of the back plate; preferably, four screws are fastened on the ground side to enhance the fixing effect.

[0129] S18: Locking iron cover screw:

[0130] Screw the iron cover on the PCB board and turn the machine over to the front. Preferably, four screws are screwed on the PCB board to enhance the fixing effect.

[0131] S19: Paste conductive cloth and Mylar:

[0132] Conductive cloths are attached to the lower left and right corners of the glass respectively, preferably one conductive cloth is attached to each corner, so as to guide the static electricity of the glass into the back plate; at the same time, insulating Mylar is attached between the ground side of the glass and the iron cover.

[0133] Embodiment 3

[0134] This embodiment provides a large-size display screen based on any of the above embodiments, and the large-size display screen is manufactured by the large-size display screen production process described in any of the above embodiments. The specific production process steps will not be repeated here, and please refer to the records of the above embodiments for details.

[0135] The large-size display screen described in this embodiment, especially the 31.5-inch display screen, which is made by a specific production process, uses Mini LED to replace the traditional LCD as the backlight source, so as to achieve individual control of the switching, brightness and other states of each partition lamp bead of the display screen, so as to better meet the usage requirements of different scenarios and different users.

[0136] To sum up, the present invention provides a large-size display screen and its production process. Through the production process, it is possible to mass-produce large-size Mini backlight display screens that support zoned brightness control, significantly improve production efficiency, and better meet user needs; the resulting large-size display screen will have the function of individually controlling the brightness, switch and other states of each zone, thereby better meeting the usage requirements of different scenarios.

[0137] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A large-size display screen production process, characterized in that: The following steps are involved: S1: Mylar tape on the back panel: The three sides of the back panel are respectively pasted with Mylar tape for edge wrapping; S2: Attach easy-to-pull adhesive tape to the back panel: Attach easy-to-pull adhesive tape to the front of the back panel; S3: Cover glass substrate: The Mini LED glass substrate is attached to the front side of the backplane by a glass substrate limiting jig; S4: Fixing the light board PCB board: fixing the PCB board of the Mini LED glass substrate on the back side of the back plate; S5: Lock the light board iron cover: attach two or more silicone pads on the ground side of the back panel; S6: Installing the pressure strips: Install a pressure strip on each of the four sides of the back panel; S7: Attaching silicone pads: Attach silicone pads on both sides of each pressure strip; S8: Screen projection wiring: insert the lighting adapter wire on the PCB board; S9: Installing a diffusion plate: Installing a diffusion plate on the Mini LED glass substrate, and the diffusion plate cannot be pressed onto the silicone pads on both sides of the pressure strip on the back panel; S10: Film assembly: a quantum film and a COPP film are respectively installed on the diffusion plate to obtain a backlight assembly.

2. A large-size display screen production process as claimed in claim 1, characterized in that: The following steps are also included: S11: Backlight inspection: lighting up the backlight assembly to detect whether there is any foreign matter on the Mini LED glass substrate; S12: Fixing the middle frame: using the middle frame to fix the backlight assembly; S13: Cover glass: attaching the glass to the middle frame to obtain a machine platform; S14: Turning over the machine: turning the machine over to the back and unplugging the lighting adapter cable; S15: PCB board fixing: attaching EVA and conductive foam between the PCB board and the back plate.

3. A large-size display screen production process as claimed in claim 2, characterized in that: The following steps are also included: S16: MES code scanning: scan the screen barcode and glass barcode respectively and upload them to the MES system; S17: Lock the ground side screws: install an iron cover on the PCB board, and fix it with screws on the ground side of the backplane; S18: Locking iron cover screws: Lock the iron cover on the PCB board with screws; S19: Attaching conductive cloth and Mylar: Attaching conductive cloth to the lower left corner and the lower right corner of the glass respectively, and attaching insulating Mylar between the ground side of the glass and the iron cover.

4. A large-size display screen production process as claimed in claim 3, characterized in that: In the S17, four screws are used to fix the ground of the back plate; in the S18, four screws are used to fix the iron cover on the PCB board; in the S19, a conductive cloth is attached to the lower left corner and the lower right corner of the glass respectively.

5. A large-size display screen production process as claimed in claim 1, characterized in that: In the S2, 8 easy-to-pull adhesive strips are attached to the front of the back panel.

6. A large-size display screen production process as claimed in claim 1, characterized in that: In S4, the PCB board is fixed to the back side of the back plate by EVA bonding.

7. A large-size display screen production process as claimed in claim 1, characterized in that: In S5, four silicone pads are attached to the ground side of the back plate.

8. A large-size display screen production process as claimed in claim 1, characterized in that: In the S7, two silicone pads are attached to both sides of each pressure strip.

9. A large-size display screen, characterized in that: The large-size display screen is manufactured by the large-size display screen production process described in any one of claims 1 to 8 above.

10. A large-size display screen as claimed in claim 9, characterized in that: The large-size display screen is a 31.5-inch display screen.

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