A display module and its manufacturing process

Abstract

The present invention discloses a display module and its manufacturing process. The display module includes a cover plate and a display stack structure; the display stack structure includes: a polarizer stack and a substrate layer; the polarizer stack and the substrate layer are respectively disposed on the first surface and the second surface of the display stack structure; wherein, a first PSA layer is further included; the first PSA layer is disposed between the cover plate and the polarizer stack for bonding the cover plate and the polarizer stack to obtain a polarized cover plate; the polarizer stack includes a second PSA layer; the second PSA layer is disposed on the second surface of the polarizer stack for bonding the polarized cover plate and the substrate layer to form a display stack structure. By first dotting silver paste to connect the high-resistance film and the ITO film, and then using the first PSA layer to bond the cover plate and the polarizer stack through physical pressing to form a polarized cover plate, the problems of white edges, bubbles, deformation of the polarizer and bulges and wrinkles generated by the silver paste in the prior art are solved, and the full lamination process is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and particularly relates to a display module and a manufacturing process thereof. Background Art

[0002] In order to make the ground levels (voltage levels) of the upper and lower glasses of the TFT-LCD (liquid crystal display screen) consistent and prevent screen flicker problems, it is necessary to apply silver paste at the cross-section points of the upper glass and the lower glass during production. The silver paste connects the high-resistance film on the upper glass and the GND ITO on the lower glass. Since the silver paste is in a flowing state during the application process, it will inevitably come into contact with the upper polarizer. In addition to silver powder and resin, the silver paste also contains various volatile additives, and the proportion of the volatile additives is about 10%. In the traditional curing process of the silver paste at room temperature or in a hot air circulation heating furnace, the curing is from the outside to the inside and the curing time is long. As a result, the volatile additives that cannot volatilize in time inside the silver paste will penetrate into the polarizer, causing white edges, bubbles, deformation of the polarizer, and bulges and wrinkles in the silver paste, thereby resulting in bright edges of the display screen. This process requires strict production control. Summary of the Invention

[0003] The existing TFT liquid crystal display screen and its manufacturing process are prone to problems such as white edges, bubbles, deformation of the polarizer, and bulges and wrinkles in the silver paste.

[0004] In view of the above problems, a display module and a manufacturing process thereof are proposed. By first applying silver paste to connect the high-resistance film and the ITO film, and then using the first PSA layer to stack and bond the cover plate and the polarizer through physical pressing to form a polarized cover plate, the problems of white edges, bubbles, deformation of the polarizer, and bulges and wrinkles in the silver paste caused by the silver paste in the prior art are solved, and the full lamination process is simple.

[0005] In a first aspect, a display module includes:

[0006] A cover plate;

[0007] A display stack structure;

[0008] The display stack structure includes:

[0009] A polarizer stack;

[0010] A substrate layer;

[0011] The polarizer stack and the substrate layer are respectively disposed on the first surface and the second surface of the display stack structure;

[0012] Wherein, it further includes:

[0013] A first PSA layer;

[0014] The first PSA layer is disposed between the cover plate and the polarizer stack, and is used to bond the cover plate and the polarizer stack to obtain a polarized cover plate;

[0015] The polarizer stack includes:

[0016] A second PSA layer;

[0017] The second PSA layer is disposed on the second surface of the polarizer stack, and is used to bond the polarized cover plate and the substrate layer to form the display stack structure.

[0018] In combination with the display module described in the present invention, in a first possible implementation manner, the polarizer stack further includes:

[0019] A third PSA layer;

[0020] A first TAC layer;

[0021] A second TAC layer;

[0022] The first TAC layer, the third PSA layer, the second TAC layer, and the second PSA layer are sequentially stacked from the first surface to the second surface to form the polarizer stack.

[0023] In combination with the first possible implementation manner of the present invention, in a second possible implementation manner, the substrate layer includes:

[0024] A high-resistance film;

[0025] A CF glass layer;

[0026] An ITO film;

[0027] A TFT glass layer;

[0028] The high-resistance film is disposed on the CF glass layer;

[0029] The ITO film is disposed on the TFT glass layer;

[0030] The high-resistance film and the ITO film are connected by dot silver paste.

[0031] In combination with the second possible implementation manner of the present invention, in a third possible implementation manner, the display module further includes:

[0032] A backlight layer;

[0033] The backlight layer is disposed on the second surface of the display module.

[0034] Second aspect, a display module manufacturing process for manufacturing the display module of the first aspect, includes:

[0035] Step 100: Connect the high-resistance film on the CF glass layer to the ITO film on the TFT glass layer by dotting silver paste;

[0036] Step 200: Stack and bond the cover plate and the polarizer to obtain a polarized cover plate;

[0037] Step 300: Bond the polarized cover plate to the substrate layer to form a display stack structure;

[0038] Step 400: Assemble and bond the display stack structure to the backlight layer to obtain a display module.

[0039] Combined with the display module manufacturing process of the present invention, in the first possible implementation manner, the step 100 includes:

[0040] Step 110: Set the high-resistance film on the CF glass layer;

[0041] Step 120: Set the ITO film on the TFT glass layer;

[0042] Step 130: Connect the high-resistance film to the ITO film by dotting silver paste.

[0043] Combined with the first possible implementation manner of the present invention, in the second possible implementation manner, the step 200 includes:

[0044] Step 210: Set the polarizer stack and the substrate layer on the first surface and the second surface of the display stack structure respectively;

[0045] Step 220: Set a first PSA layer between the cover plate and the polarizer stack;

[0046] Step 230: Bond the cover plate and the polarizer stack by using the first PSA layer to obtain a polarized cover plate.

[0047] Combined with the second possible implementation manner of the present invention, in the third possible implementation manner, the step 300 includes:

[0048] Step 310: Set a second PSA layer on the second surface of the polarizer stack;

[0049] Step 320: Bond the polarized cover plate and the substrate layer by using the second PSA layer to form the display module.

[0050] Combined with the third possible implementation manner of the present invention, in the fourth possible implementation manner, the step 200 further includes:

[0051] Step 240: Set a third PSA layer in the middle of the polarizer stack;

[0052] Step 250: Stack the first TAC layer, the third PSA layer, the second TAC layer, and the second PSA layer in sequence from the first side to the second side to form the polarizer stack.

[0053] Combined with the fourth possible implementation manner of the present invention, in the fifth possible implementation manner, the step 230 includes:

[0054] Step 231: Bond the cover plate and the polarizer stack by physical pressing using the first PSA layer to form a polarized cover plate.

[0055] Implementing the display module and its manufacturing process of the present invention, by first dotting silver paste to connect the high-resistance film and the ITO film, and then bonding the cover plate and the polarizer stack by physical pressing using the first PSA layer to form a polarized cover plate, the problems of white edges, bubbles, deformation of the polarizer and bulging and wrinkling of the silver paste in the prior art are solved, and the full lamination process is simple. Description of the Drawings

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 It is the first schematic diagram of a display module in the present invention;

[0058] Figure 2 It is the second schematic diagram of a display module in the present invention;

[0059] Figure 3 It is the third schematic diagram of a display module in the present invention;

[0060] Figure 4 It is the first schematic diagram of a manufacturing process of a display module in the present invention;

[0061] Figure 5 It is the second schematic diagram of a manufacturing process of a display module in the present invention;

[0062] Figure 6 It is the third schematic diagram of a manufacturing process of a display module in the present invention;

[0063] Figure 7 It is the fourth schematic diagram of a manufacturing process of a display module in the present invention;

[0064] Figure 8 It is the fifth schematic diagram of a manufacturing process of a display module in the present invention;

[0065] The names of the parts referred to by the numbers in the drawings are as follows: 10 - cover plate, 101 - polarized cover plate, 20 - first PSA layer, 30 - display laminate structure, 310 - polarizer laminate, 320 - substrate layer, 311 - first TAC layer, 312 - third PSA layer, 313 - second TAC layer, 314 - second PSA layer, 321 - high-resistance film, 322 - CF glass layer, 323 - ITO film, 324 - TFT glass layer, 301 - silver paste. Detailed implementation manners

[0066] The technical solutions in the present invention will be clearly and completely described below with reference to the drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0068] Glossary of terms

[0069] TAC: A polymer film with high strength, high light transmittance and resistance to heat and humidity, which protects the PSA from being damaged by water;

[0070] PSA: A type of pressure-sensitive adhesive

[0071] ITO: Indium tin oxide transparent conductive film

[0072] In the existing TFT liquid crystal display screen and its manufacturing process, it is easy to cause problems such as white edges, bubbles, deformation of the polarizer and bulging and wrinkling of the silver paste 301.

[0073] In view of the above problems, a display module and its manufacturing process are proposed.

[0074] Embodiment 1

[0075] A display module, as Figure 1 and 2 , Figure 1 is the first schematic diagram of a display module in the present invention, Figure 2It is the second schematic diagram of a display module in the present invention; it includes a cover plate 10 and a display stack structure 30; the display stack structure 30 includes a polarizer stack 310 and a substrate layer 320; the polarizer stack 310 and the substrate layer 320 are respectively arranged on the first side and the second side of the display stack structure 30.

[0076] The display module further includes a first PSA layer 20; the first PSA layer 20 is arranged between the cover plate 10 and the polarizer stack 310, and is used to bond the cover plate 10 and the polarizer stack 310 to obtain a polarized cover plate 101.

[0077] The polarizer stack 310 includes a second PSA layer 314; the second PSA layer 314 is arranged on the second side of the polarizer stack 310, and is used to bond the polarized cover plate 101 and the substrate layer 320 to form the display stack structure 30.

[0078] In addition to the above-mentioned film layer structures, those skilled in the art know that the display module in the embodiment of the present application of course also includes other structural film layers that meet the basic display functions, such as polarizers required for display, circuit structure layers, liquid crystal layers, etc. These structural film layers are combined with the display module of the present application to complete the display functions and effects to be achieved by the present application, but these structural film layers will not be described in detail in the embodiments of the present application.

[0079] In the embodiment of the present application, the silver paste 301 can be used to connect the high-resistance film 321 on the CF glass layer 322 and the ITO film 323 on the TFT glass layer 324 first. However, at this time, the polarizer stack 310 and the substrate layer 320 in the display stack structure 30 are in a separated state, avoiding the risk of the silver paste 301 corroding the polarizer stack 310.

[0080] On the other hand, the separated polarizer stack 310 is bonded to the cover plate through the first PSA layer 20 to form a polarized cover plate 101.

[0081] After the silver paste 301 is cooled, the polarized cover plate 101 is bonded to the substrate again, and the overall process is simple. By first dotting the silver paste 301 to connect the high-resistance film 321 and the ITO film 323, and then using the first PSA layer 20 to bond the cover plate and the polarizer stack 310 through physical pressing to form a polarized cover plate 101, the problems of white edges, bubbles, deformation of the polarizer caused by the silver paste 301 and bulges and wrinkles generated by the silver paste 301 in the prior art are solved, and the full lamination process is simple.

[0082] In the embodiment of the present application, the first side is the side close to the cover plate or the display surface, and the second side in the present application is the side far from the cover plate or the display surface.

[0083] Embodiment 2

[0084] In one embodiment, as Figure 2 , in addition to the second PSA layer 314, the polarizer stack 310 further includes other film layers, which can be specifically implemented as:

[0085] The polarizer stack 310 further includes a third PSA layer 312, a first TAC layer 311, and a second TAC layer 313.

[0086] The first TAC layer 311, the third PSA layer 312, the second TAC layer 313, and the second PSA layer 314 are stacked in sequence from the first side to the second side to form the polarizer stack 310.

[0087] In one embodiment, as Figure 3 , Figure 3 is the third schematic diagram of a display module in the present invention; the substrate layer 320 includes a high-resistance film 321, a CF glass layer 322, an ITO film 323, and a TFT glass layer 324.

[0088] The high-resistance film 321 is disposed on the CF glass layer 322; the ITO film 323 is disposed on the TFT glass layer 324; the high-resistance film 321 is connected to the ITO film 323 by dot silver paste 301.

[0089] Furthermore, the display module further includes a backlight layer; the backlight layer is disposed on the second side of the display module.

[0090] Example 3

[0091] As Figure 4 , Figure 4 is the first schematic diagram of a manufacturing process of a display module in the present invention; a manufacturing process of a display module for manufacturing the display module of the first aspect includes: Step 100, connecting the high-resistance film 321 on the CF glass layer 322 to the ITO film 323 on the TFT glass layer 324 by dot silver paste 301; Step 200, bonding the cover plate to the polarizer stack 310 to obtain a polarized cover plate 101; Step 300, bonding the polarized cover plate 101 to the substrate layer 320 to form a display stack structure 30; Step 400, assembling and laminating the display stack structure 30 with the backlight layer to obtain the display module.

[0092] In addition to the above film layer structures, those skilled in the art know that the display module in the embodiments of the present application of course also includes other structural film layers that meet the basic display functions, such as polarizers required for display, circuit structure layers, liquid crystal layers, etc. These structural film layers are combined with the display module of the present application to complete the display functions and effects to be achieved by the present application, but these structural film layers are not described in detail in the embodiments of the present application.

[0093] In the embodiment of the present application, the silver paste 301 can be first applied to connect the high-resistance film 321 on the CF glass layer 322 to the ITO film 323 on the TFT glass layer 324. However, at this time, the polarizer stack 310 and the substrate layer 320 in the display stack structure 30 are in a separated state, avoiding the risk of the silver paste 301 corroding the polarizer stack 310.

[0094] On the other hand, the separated polarizer stack 310 is adhered to the cover plate through the first PSA layer 20 to form the polarized cover plate 101.

[0095] After the silver paste 301 cools down, the polarized cover plate 101 is adhered to the substrate again, and the overall process is simple.

[0096] In the embodiment of the present application, the first side is the side close to the cover plate or the display surface, and the second side in the present application is the side far from the cover plate or the display surface.

[0097] In one embodiment, as Figure 5 , Figure 5 is the second schematic diagram of a display module manufacturing process in the present invention; step 100 includes: step 110, disposing the high-resistance film 321 on the CF glass layer 322; step 120, disposing the ITO film 323 on the TFT glass layer 324; step 130, connecting the high-resistance film 321 and the ITO film 323 by applying the silver paste 301.

[0098] In one embodiment, as Figure 6 , Figure 6 is the third schematic diagram of a display module manufacturing process in the present invention; step 200 includes: step 210, disposing the polarizer stack 310 and the substrate layer 320 on the first side and the second side of the display stack structure 30 respectively; step 220, disposing the first PSA layer 20 between the cover plate and the polarizer stack 310; step 230, adhering the cover plate and the polarizer stack 310 by using the first PSA layer 20 to obtain the polarized cover plate 101.

[0099] In one embodiment, as Figure 7 , Figure 7 is the fourth schematic diagram of a display module manufacturing process in the present invention; step 300 includes: step 310, disposing the second PSA layer 314 on the second side of the polarizer stack 310; step 320, adhering the polarized cover plate 101 and the substrate layer 320 by using the second PSA layer 314 to form the display module.

[0100] Preferably, as Figure 8 , Figure 8 is the fifth schematic diagram of a display module manufacturing process in the present invention; step 200 further includes:

[0101] Step 240: Set the third PSA layer 312 in the middle of the polarizer stack 310; Step 250: Stack the first TAC layer 311, the third PSA layer 312, the second TAC layer 313, and the second PSA layer 314 in sequence from the first side to the second side to form the polarizer stack 310.

[0102] In a preferred embodiment, Step 230 includes: Step 231: Bond the cover plate and the polarizer stack 310 through physical pressing using the first PSA layer 20 to form the polarized cover plate 101.

[0103] Implementing the display module and its manufacturing process of the present invention, by first applying silver paste 301 to connect the high-resistance film 321 and the ITO film 323, and then bonding the cover plate and the polarizer stack 310 through physical pressing using the first PSA layer 20 to form the polarized cover plate 101, it solves the problems of white edges, bubbles, deformation of the polarizer, and bulges and wrinkles generated by the silver paste 301 in the prior art, and the full lamination process is simple.

[0104] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display module, characterized in that, Comprising: Cover plate; Display laminate structure; The display laminate structure comprises: Polarizer laminate; Substrate layer; The polarizer laminate and the substrate layer are respectively disposed on the first surface and the second surface of the display laminate structure; Wherein, it further comprises: First PSA layer; The first PSA layer is disposed between the cover plate and the polarizer laminate for bonding the cover plate and the polarizer laminate to obtain a polarized cover plate; The polarizer laminate comprises: Second PSA layer; The second PSA layer is disposed on the second surface of the polarizer laminate for bonding the polarized cover plate and the substrate layer to form the display laminate structure; The substrate layer comprises: High-resistance film; CF glass layer; ITO film; TFT glass layer; The high-resistance film is disposed on the CF glass layer; The ITO film is disposed on the TFT glass layer; The high-resistance film and the ITO film are connected by dotting silver paste.

2. The display module according to claim 1, wherein The polarizer laminate further comprises: Third PSA layer; First TAC layer; Second TAC layer; The first TAC layer, the third PSA layer, the second TAC layer, and the second PSA layer are sequentially stacked from the first surface to the second surface to form the polarizer laminate.

3. The display module according to claim 1, characterized in that, The display module further comprises: Backlight layer; The backlight layer is disposed on the second surface of the display module.

4. A manufacturing process for a display module for manufacturing the display module according to any one of claims 1-3, characterized in that, Comprising: Step 100: Connect the high-resistance film on the CF glass layer and the ITO film on the TFT glass layer by dotting silver paste; Step 200: Bond the cover plate and the polarizer laminate to obtain a polarized cover plate; Step 300: Bond the polarized cover plate and the substrate layer to form a display laminate structure; Step 400: Assemble and bond the display laminate structure and the backlight layer to obtain a display module.

5. The manufacturing process of the display module according to claim 4, characterized in that, The step 100 comprises: Step 110: Dispose the high-resistance film on the CF glass layer; Step 120: Dispose the ITO film on the TFT glass layer; Step 130: Connect the high-resistance film and the ITO film by dotting silver paste.

6. The manufacturing process of the display module according to claim 5, wherein The step 200 comprises: Step 210: Respectively dispose the polarizer laminate and the substrate layer on the first surface and the second surface of the display laminate structure; Step 220: Dispose a first PSA layer between the cover plate and the polarizer laminate; Step 230: Bond the cover plate and the polarizer laminate by using the first PSA layer to obtain a polarized cover plate.

7. The manufacturing process of the display module according to claim 6, characterized in that, The step 300 comprises: Step 310: Dispose a second PSA layer on the second surface of the polarizer laminate; Step 320: Bond the polarized cover plate and the substrate layer by using the second PSA layer to form the display module.

8. The manufacturing process of the display module according to claim 7, wherein, The step 200 further comprises: Step 240: Dispose a third PSA layer in the middle of the polarizer laminate; Step 250: Stack the first TAC layer, the third PSA layer, the second TAC layer, and the second PSA layer in sequence from the first surface to the second surface to form the polarizer laminate.

9. The manufacturing process of the display module according to claim 8, wherein, The step 230 comprises: Step 231: Bond the cover plate and the polarizer laminate by physical pressing using the first PSA layer to form a polarized cover plate.

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