Structure for improving thin film transistor (TFT) lamination yellow spots

Abstract

The utility model discloses a structure for improving TFT (Thin Film Transistor) lamination yellow spots, which comprises a platform, wherein a TFT is erected at the top of the platform; the cover plate is adhered to the top of the TFT through an adhesive; the air bag is arranged above the cover plate and is used for being connected with the output end of an external vacuum laminating machine; and the sponge is arranged between the air bag and the cover plate and is used for uniformly dispersing the pressure for pressing the air bag on the surface of the cover plate. According to the structure provided by the utility model, before vacuum lamination of the TFT and the cover plate, the sponge with a certain thickness is added below the air bag, then vacuum lamination is carried out, during lamination, the air bag is pressed down to contact the sponge, the sponge is pressed, the pressure is slowly transmitted to the surface of the cover plate, and the cover plate is laminated with the TFT, so that the TFT and the cover plate are laminated together. The sponge is arranged between the air bag and the cover plate, so that a buffering effect can be achieved, meanwhile, pressure at the bottom of the air bag can be evenly absorbed through the sponge and then transmitted to the surface of the cover plate, and the situation that stress is concentrated in a certain area is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of TFT, in particular to a structure for improving TFT adhesion to yellow spots. Background Art

[0002] Color LCD screen, abbreviated as TFT, refers to thin film transistor, which means that each liquid crystal pixel is driven by a thin film transistor integrated behind the pixel, so that screen information can be displayed at high speed, high brightness and high contrast. It is one of the best LCD color display devices, with an effect close to that of CRT monitors, and is the mainstream display device on laptops and desktops.

[0003] When laminating the cover plate and TFT, an airbag vacuum laminating machine is often used for laminating. During the operation of a conventional airbag vacuum laminating machine, the airbag moves downward and directly presses onto the surface of the cover plate. The cover plate is subjected to the force and comes into contact with the TFT below it, and finally the laminating adhesive is used to achieve relative lamination.

[0004] However, in the actual application process of the above operation scheme, it was found that since the surface of the airbag is not flat, when it is pressed down on the surface of the cover plate, the pressure on different areas of the cover plate is also different, which will cause the stress on the TFT in direct contact with the cover plate to be uneven. Therefore, after the bonding is completed, yellow spots are likely to appear on the screen in areas with different stresses. Therefore, a structure to improve the yellow spots of TFT bonding is proposed. Utility Model Content

[0005] Based on this, it is necessary to provide a structure to improve the TFT bonding to the yellow spot to address the above technical problems, and add a sponge between the airbag and the cover plate to disperse the stress during the downward pressure process so that it is evenly distributed on the TFT to avoid stress concentration in a certain area.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A structure for improving TFT adhesion to the macula, comprising:

[0008] A platform, with a TFT set up on the top of the platform;

[0009] A cover plate, which is attached to the top of the TFT by bonding adhesive;

[0010] An air bag, which is arranged above the cover plate and is used to connect with an output end of an external vacuum laminating machine;

[0011] The sponge is arranged between the airbag and the cover plate and is used for evenly dispersing the pressure of the airbag on the surface of the cover plate.

[0012] Furthermore, the size of the sponge is larger than that of the airbag.

[0013] Furthermore, the outer side of the sponge is wrapped with side strips.

[0014] Furthermore, side panels are hinged on both sides of the side strips, and guide panels are provided on the surfaces of the side panels, and the sponge can slide along the height direction of the guide panels;

[0015] Wherein, the bottom of the guide plate is connected with a counterweight seat.

[0016] Furthermore, a slide rail is provided at a position on the platform corresponding to the counterweight seat, and the counterweight seat is slidably assembled with the slide rail via a slide groove.

[0017] Furthermore, a cleaning unit is provided between the two slide rails for cleaning the pressing surface of the sponge.

[0018] Further, the cleaning unit comprises a cleaning roller and a rotating member provided at both ends of the cleaning roller and assembled with the slide rail;

[0019] Wherein, support arms are fixed at both ends of the cleaning roller.

[0020] Further, the rotating member includes a frame fixed to the inner side of the slide rail and an active cavity formed in the frame;

[0021] One end of the support arm is rotatably connected with a slider, and the slider extends into the active cavity to form a sliding assembly with the frame.

[0022] Furthermore, a spring is fixedly provided in the movable cavity, and a free end of the spring is connected to the corresponding support arm.

[0023] Furthermore, a positioning pin is threadedly penetrated on the surface of the support arm, and a first limiting groove and a second limiting groove matched with the positioning pin are respectively formed on one side and the top of the frame body.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model provides a structure for improving the yellow spot of TFT bonding. Before the TFT and the cover plate are vacuum bonded, a sponge with a certain thickness is added under the airbag, and then vacuum bonding is performed. During bonding, the airbag presses down to contact the sponge, and the sponge is subjected to pressure, which is then slowly transferred to the surface of the cover plate and bonded together with the TFT. Since the sponge is between the airbag and the cover plate, it can play a buffering role. At the same time, the pressure at the bottom of the airbag can be evenly absorbed through the sponge and then transferred to the surface of the cover plate, thereby avoiding the situation where stress is concentrated in a certain area, and effectively solving the problem of yellow spots easily appearing on the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of improving TFT lamination to the yellow spot provided by the utility model;

[0027] Figure 2 A schematic diagram of a sponge structure for improving the structure of TFT fitting to the macula provided by the utility model;

[0028] Figure 3 The utility model provides a structure for improving the TFT adhesion to the yellow spot Figure 2 The enlarged structural diagram at A in the middle;

[0029] Figure 4 A schematic diagram of a slide rail structure for improving the structure of TFT lamination to the yellow spot provided by the utility model;

[0030] Figure 5 A schematic diagram of the cleaning unit structure for improving the TFT adhesion to the yellow spot provided by the utility model;

[0031] Figure 6 The utility model provides a structure for improving the TFT adhesion to the yellow spot Figure 5 The enlarged structural diagram at B in the middle;

[0032] Figure 7 A schematic diagram of the side view structure of the structure for improving TFT adhesion to the macula provided by the utility model.

[0033] The markings in the figure are as follows:

[0034] Platform 1, TFT 11, cover plate 12, bonding adhesive 13;

[0035] Airbag 2;

[0036] Sponge 3, side strips 31, side plates 32, guide plates 33, counterweight seats 34, and slide rails 35;

[0037] Cleaning unit 4, cleaning roller 41, rotating member 42, supporting arm 43, sliding block 44, positioning pin 45, limiting groove 1 46, limiting groove 2 47;

[0038] Frame 420 , movable cavity 421 , spring 422 . DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0040] As mentioned in the background technology, since the surface of the airbag is not flat, when it is pressed down on the surface of the cover plate, the pressure on different areas of the cover plate is also different, which will cause the stress on the TFT in direct contact with the cover plate to be uneven. Therefore, after the bonding is completed, yellow spots are likely to appear on the screen in areas with different stresses.

[0041] In order to solve this technical problem, the utility model provides a structure for improving TFT adhesion to yellow spots, which is applied to TFT.

[0042] Specifically, please refer to Figure 1-Figure 7 , the structure of improving TFT bonding to the macula specifically includes:

[0043] Platform 1, a TFT 11 is set up on the top of the platform 1;

[0044] A cover plate 12, which is attached to the top of the TFT 11 by means of a bonding adhesive 13;

[0045] The airbag 2 is arranged above the cover plate 12 and is used to connect with the output end of the external vacuum laminating machine;

[0046] The sponge 3 is disposed between the airbag 2 and the cover plate 12 and is used to evenly distribute the pressure of the airbag 2 on the surface of the cover plate 12 .

[0047] The utility model provides a structure for improving the yellow spot of TFT lamination. Before the TFT 11 and the cover plate 12 are vacuum-laminated, a sponge 3 with a certain thickness is added under the airbag 2, and then the vacuum lamination is performed. During the lamination, the airbag 2 is pressed down to contact the sponge 3. The sponge 3 is subjected to pressure and then slowly transfers the pressure to the surface of the cover plate 12 and is laminated together with the TFT 11. Since the sponge 3 is between the airbag 2 and the cover plate 12, it can play a buffering role. At the same time, the pressure at the bottom of the airbag 2 can be evenly absorbed through the sponge 3 and then transferred to the surface of the cover plate 12, thereby avoiding the situation where stress is concentrated in a certain area, and effectively solving the problem of poor yellow spots on the screen.

[0048] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] Example 1

[0052] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, a structure for improving TFT lamination yellow spot, a platform 1, a TFT 11 is set on the top of the platform 1; a cover plate 12, which is adhered to the top of the TFT 11 by a laminating adhesive 13; an airbag 2, which is arranged above the cover plate 12 and is used for connecting with the output end of an external vacuum laminating machine; a sponge 3, which is arranged between the airbag 2 and the cover plate 12, and is used for evenly dispersing the pressure of pressing the airbag 2 down on the surface of the cover plate 12.

[0053] The size of the sponge 3 is larger than that of the airbag 2. The outer side of the sponge 3 is wrapped with a side strip 31. By wrapping the side strip 31 on the outer side of the sponge 3, the cut surface of the sponge 3 can be protected. At the same time, since the size of the sponge 3 is larger than that of the airbag 2, the pressure dispersion of the airbag 2 by the sponge 3 will not be affected during the actual downward pressure of the airbag 2, and the side strip 31 will not form a movement obstacle.

[0054] The side panels 32 are hinged on both sides of the side strips 31, and the surface of the side panels 32 is penetrated with guide plates 33, and the sponge 3 can slide along the height direction of the guide plates 33. The side panels 32 can slide freely on the surface of the guide plates 33 through the structural design, so that when the airbag 2 is pressed down, the sponge 3 can move downward synchronously after receiving the force, and the movement of the sponge 3 will not be hindered by the connection between the side strips 31, the side panels 32 and the guide plates 33, so that the sponge 3 can be taken out of the platform 1 at any time.

[0055] Among them, the bottom of the guide plate 33 is connected to a counterweight seat 34, and the counterweight seat 34 can increase or decrease its own weight according to the actual weight of the sponge 3. It only needs to ensure that the counterweight seat 34 can be stably placed on the platform 1 and is not prone to sliding. At the same time, the bottom of the counterweight seat 34 can also be connected to the platform 1 by means of glue or the like, further ensuring the stable placement of the counterweight seat 34.

[0056] The structure for improving the TFT lamination yellow spot provided in this embodiment, during the downward pressing process of the airbag 2, the uneven surface below the airbag 2 will first contact the surface of the sponge 3, and the sponge 3 disperses the stress through its own structural characteristics, so that the stress is evenly and dispersedly transmitted to the surface of the cover plate 12, so that the cover plate 12 is pressed and pasted with the TFT 11 through the laminating adhesive 13. Compared with the traditional operation of only directly contacting the airbag 2 with the cover plate 12, it effectively avoids the situation that the surface stress of the cover plate 12 is inconsistent due to the uneven bottom of the airbag 2, which is easy to cause local yellow spots;

[0057] At the same time, after the actual downward pressing operation of the airbag 2, the airbag 2 will retract to the initial height. At this time, the side strip 31 can be flipped on the surface of the side panel 32, so that the sponge 3 is flipped to the side above the cover plate 12. Through this operation, the cover plate 12 can be removed after pressing, and the new cover plate 12 and TFT11 to be pressed can be easily placed. The positioning of the counterweight seat 34 can also make the sponge 3 quickly flipped into place, which is beneficial to the efficiency of TFT11 bonding.

[0058] Example 2

[0059] The structure for improving TFT adhesion to the macula provided in Example 1 is further optimized, specifically, as follows: Figure 4 As shown, a slide rail 35 is provided at a position on the platform 1 corresponding to the counterweight seat 34 , and the counterweight seat 34 is slidably assembled with the slide rail 35 through a slide groove 36 .

[0060] Through the above-mentioned structural design, the difference between this embodiment and embodiment 1 is that the sponge 3 can slide parallel to the slide rail 35 before and after use, and there is no need to flip it, thereby ensuring that the pressing surface of the sponge 3 is always facing downward, avoiding dirt and wear of the sponge 3, which effectively avoids the protection of the pressing surface during actual application and avoids dirt and wear of the sponge 3.

[0061] Example 3

[0062] The structure for improving TFT adhesion to the macula provided in Example 2 is further optimized, such as Figure 5 , Figure 6 and Figure 7 As shown, a cleaning unit 4 is provided between the two slide rails 35 for cleaning the pressed surface of the sponge 3;

[0063] The cleaning unit 4 includes a cleaning roller 41 and a rotating member 42 provided at both ends of the cleaning roller 41 and assembled with the slide rail 35, wherein both ends of the cleaning roller 41 are fixed with a supporting arm 43, and the surface of the cleaning roller 41 has a brush filament layer (not shown in the figure), which can clean the sponge 3 when it contacts with the sponge 3;

[0064] The rotating member 42 includes a frame 420 fixed to the inner side of the slide rail 35 and a movable cavity 421 formed in the frame 420;

[0065] One end of the support arm 43 is rotatably connected to a slider 44, and the slider 44 extends into the movable cavity 421 to form a sliding assembly with the frame 420;

[0066] A spring 422 is fixedly disposed in the movable cavity 421, and one free end of the spring 422 is connected to the corresponding support arm 43. Under the support force of the spring 422, the slider 44 is placed on the top of the movable cavity 421 in the initial state.

[0067] A positioning pin 45 is threadedly provided on the surface of the support arm 43 , and a first limiting groove 46 and a second limiting groove 47 matched with the positioning pin 45 are respectively formed on one side and the top of the frame body 420 .

[0068] like Figure 6 As shown, at this time, the cleaning roller 41 is in the storage state, that is, the sponge 3 does not come into contact with the cleaning roller 41 when sliding along the guide rail 35. Figure 7 As shown, at this time, the cleaning roller 41 is in a cleaning state, that is, when the sponge 3 slides through the guide of the slide rail 35, it will form a conflict with the cleaning roller 41, so that the debris particles on the surface of the sponge 3 can be cleaned;

[0069] Specifically, during the implementation process, by taking out the positioning pin 45, the support arm 43 is flipped so that the cleaning roller 41 connected thereto is flipped to the top of the frame 420, and then the positioning pin 45 is inserted into the top of the second limiting groove 47, so that the support arm 43 can be fixed, and the cleaning height of the cleaning roller 41 is limited at this time, and then the sponge 3 is pushed on the surface of the slide rail 35;

[0070] The sponge 3 during the sliding process will gradually contact and conflict with the cleaning roller 41. Figure 7 As shown, since the height of the cleaning roller 41 is higher than the height of the sponge 3 in its natural state, the sponge 3 will avoid the surface of the guide plate 33 to a certain height after being resisted by the cleaning roller 41, so that the sponge 3 will be lifted to a certain height. At this time, the sponge 3 can continue to slide, and in the process of sliding, the sponge 3 itself is affected by its own weight and can form a moving contact with the cleaning roller 41 below. Through continuous contact, the dust particles carried under the sponge 3 can be cleaned to a certain extent, so that the sponge 3 can keep clean relative to the cover plate 12 during subsequent use, which is conducive to forming a better protection for the cover plate 12. After cleaning is completed, the positioning pin 45 is taken out, the support arm 43 is turned over to drive the cleaning roller 41 to turn over and reset, and then one end of the positioning pin 45 is inserted into the corresponding limit groove 46 to form a storage limit. At this time, the storage of the cleaning unit 4 is completed;

[0071] During the above cleaning, there is no need to unfold the cleaning unit 4 for cleaning every time the cover plate 12 is pressed. The cleaning unit 4 can be unfolded periodically according to actual usage needs and the state of the sponge 3 itself. During the cleaning process, the sponge 3 can also be pushed to slide back and forth on the surface of the cleaning roller 41 to achieve multiple cleanings until the desired cleaning effect is achieved.

[0072] The use process of the structure for improving the yellow spot of TFT bonding provided by the utility model is as follows: before the TFT 11 and the cover plate 12 are vacuum bonded, a sponge 3 with a certain thickness is added under the airbag 2. During bonding, the airbag 2 is pressed down to contact the sponge 3. The sponge 3 is subjected to pressure and then slowly transfers the pressure to the surface of the cover plate 12 and is bonded together with the TFT 11. Since the sponge 3 is between the airbag 2 and the cover plate 12, it can play a buffering role. At the same time, the pressure at the bottom of the airbag 2 can be evenly absorbed through the sponge 3 and then transferred to the surface of the cover plate 12, thereby avoiding the situation where stress is concentrated in a certain area.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A structure for improving TFT adhesion to yellow spots, characterized in that: It includes: A platform (1), with a TFT (11) arranged on the top of the platform (1); A cover plate (12) adhered to the top of the TFT (11) by means of a bonding adhesive (13); An air bag (2) is arranged above the cover plate (12) and is used to be connected to an output end of an external vacuum laminating machine; The sponge (3) is arranged between the airbag (2) and the cover plate (12) and is used to evenly disperse the pressure of the airbag (2) on the surface of the cover plate (12).

2. The structure for improving TFT adhesion to yellow spots according to claim 1, characterized in that: The size of the sponge (3) is larger than that of the airbag (2).

3. The structure for improving TFT adhesion to yellow spots according to claim 1, characterized in that: The outer side of the sponge (3) is wrapped with side strips (31).

4. The structure for improving TFT adhesion to yellow spots according to claim 3, characterized in that: Side panels (32) are hingedly connected to both sides of the side strip (31), and guide plates (33) are provided on the surfaces of the side panels (32), so that the sponge (3) can slide along the height direction of the guide plates (33); The bottom of the guide plate (33) is connected to a counterweight seat (34).

5. The structure for improving TFT adhesion to yellow spots according to claim 4, characterized in that: A slide rail (35) is provided at a position on the platform (1) corresponding to the counterweight seat (34), and the counterweight seat (34) is slidably assembled with the slide rail (35) via a slide groove (36).

6. The structure for improving TFT adhesion to yellow spots according to claim 5, characterized in that: A cleaning unit (4) is provided between the two slide rails (35) for cleaning the pressing surface of the sponge (3).

7. The structure for improving TFT adhesion to yellow spots according to claim 6, characterized in that: The cleaning unit (4) comprises a cleaning roller (41) and a rotating member (42) provided at both ends of the cleaning roller (41) and assembled with the slide rail (35); Wherein, support arms (43) are fixed to both ends of the cleaning roller (41).

8. The structure for improving TFT adhesion to yellow spots according to claim 7, characterized in that: The rotating member (42) comprises a frame (420) fixed to the inner side of the slide rail (35) and a movable cavity (421) formed in the frame (420); One end of the support arm (43) is rotatably connected to a slider (44), and the slider (44) extends into the movable cavity (421) to form a sliding assembly with the frame (420).

9. The structure for improving TFT adhesion to yellow spots according to claim 8, characterized in that: A spring (422) is fixedly disposed in the movable cavity (421), and a free end of the spring (422) is connected to a corresponding support arm (43).

10. The structure for improving TFT adhesion to yellow spots according to claim 8, characterized in that: A positioning pin (45) is threadedly provided on the surface of the support arm (43), and a first limiting groove (46) and a second limiting groove (47) adapted to the positioning pin (45) are respectively formed on one side and the top of the frame body (420).

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