Device for preventing polaroid from yellowing through offset compensation and UV curing of liquid crystal screen COF

Abstract

The utility model belongs to the technical field of liquid crystal screens, and particularly relates to a liquid crystal screen COF offset compensation UV curing polaroid yellowing prevention device which comprises a first UV curing device and a second UV curing device which are arranged in parallel. Wherein the first UV curing device comprises a first base and a first bearing table arranged on the first base, a first supporting column is arranged on the base, a first sliding rail is arranged on the first supporting column, and a first UV curing part and a dispensing mechanism are arranged on the first sliding rail. In the embodiment, the first bearing table is provided with a plurality of first adsorption holes. A plurality of first telescopic positioning blocks are arranged on the periphery of the first bearing table. The device for preventing the polaroid from yellowing through the liquid crystal screen COF offset compensation UV curing has the advantages that curing and cooling are achieved at the same time, the polaroid on the surface of the liquid crystal screen is prevented from yellowing due to the too high temperature, and the picture effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal screens, and in particular relates to a device for preventing a polarizer from yellowing by using a COF gap compensation UV curing method for a liquid crystal screen. Background Art

[0002] The TFT LCD display screen has TFT glass on the light-incident side and CF glass on the light-exiting side. A driver chip COF is set between the two pieces of glass. There is a certain step difference between the TFT glass and the CF glass on one side where the COF is installed. The larger TFT glass will protrude a certain size on one side or all four sides. During the assembly of the LCD screen, a slight collision or scratch may cause damage to the TFT glass. In addition, the COF needs to be fixed during the assembly process, otherwise the soft material circuit is easily broken during the movement, causing short circuit. Before assembly, the step difference between the two pieces of glass is made up and the COF is fixed. This can effectively reduce the occurrence of such defects and improve the production yield.

[0003] The method of using glue to make up for the gap is highly efficient and accurate. Since the glue is fluid, it must be quickly cured after dispensing. The glue used for dispensing is generally UV glue. A UV curing device is set behind the glue syringe to complete the dispensing and curing in one go. However, the UV curing lamp will generate heat energy during the glue curing process, and the temperature of the LCD screen will rise after irradiation. In particular, to achieve the purpose of rapid curing, the UV equipment requires higher energy. The higher the energy, the more heat energy is generated, and the higher the temperature of the LCD screen. The polarizer located on the surface of the LCD screen is prone to yellowing during the curing process, affecting the picture effect of the LCD screen. Utility Model Content

[0004] The purpose of the utility model is to provide a device for preventing the polarizer from yellowing during COF-compensated UV curing of a liquid crystal screen, so as to solve the technical problem that after the liquid crystal screen is affected by high energy and high temperature, the polarizer located on the surface of the liquid crystal screen is easily yellowed during the curing process, thereby affecting the picture effect of the liquid crystal screen, so as to achieve the purpose of achieving simultaneous curing and cooling, avoiding the polarizer on the surface of the liquid crystal screen from yellowing due to excessively high temperature, and improving the picture effect.

[0005] In order to solve the above technical problems, the utility model provides a device for preventing the polarizer from yellowing by UV curing COF gap compensation of liquid crystal screen, comprising:

[0006] A first UV curing device and a second UV curing device arranged in parallel;

[0007] The first UV curing device comprises a first base and a first bearing platform arranged on the first base, the base is provided with a first supporting column, the first supporting column is provided with a first slide rail, and the first slide rail is provided with a first UV curing component and a dispensing mechanism;

[0008] The second UV curing device includes a second base and a second bearing platform arranged on the second base, the base is provided with a second supporting column, the second supporting column is provided with a second slide rail, and the second slide rail is provided with a second UV curing component and an air blowing and cooling mechanism.

[0009] Furthermore, the first supporting platform is provided with a plurality of first adsorption holes.

[0010] Furthermore, a plurality of first retractable positioning blocks are arranged around the first supporting platform.

[0011] Furthermore, a first rotating motor is disposed below the first supporting platform to rotate the first supporting platform.

[0012] Furthermore, the second supporting platform is provided with a plurality of second adsorption holes.

[0013] Furthermore, a plurality of second retractable positioning blocks are arranged around the second supporting platform.

[0014] Furthermore, a second rotating motor is provided below the second supporting platform to rotate the second supporting platform.

[0015] The beneficial effects of the utility model are:

[0016] 1. Glue the LCD screen through the glue dispensing mechanism, and then preliminarily cure the LCD screen through the first UV curing component, and then cure the LCD screen again through the second UV curing component. In the process of secondary curing of UV glue, the surface of the LCD screen is cooled by cold air to prevent the polarizer from turning yellow due to excessive surface temperature of the LCD screen caused by high-power curing.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the device for preventing the polarizer from yellowing by compensating the COF gap of the liquid crystal screen and UV curing of the utility model;

[0020] Figure 2It is a structural schematic diagram of a first rotating electrical machine of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the second rotating electrical machine of the utility model.

[0022] In the figure:

[0023] 1. First UV curing device; 11. First base; 12. First bearing platform; 13. First support column; 14. First slide rail; 15. First UV curing part; 16. Glue dispensing mechanism; 17. First adsorption hole; 18. First retractable positioning block; 19. First rotating motor;

[0024] 2. Second UV curing device; 21. Second base; 22. Second bearing platform; 23. Second supporting column; 24. Second slide rail; 25. Second UV curing part; 26. Air blast cooling mechanism; 27. Second adsorption hole; 28. Second retractable positioning block; 29. ​​Second rotating motor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example:

[0027] like Figures 1 to 3 As shown, a device for liquid crystal screen COF gap compensation UV curing to prevent yellowing of polarizer includes: a first UV curing device 1 and a second UV curing device 2 arranged in parallel.

[0028] The first UV curing device 1 includes a first base 11 and a first bearing platform 12 disposed on the first base 11, a first support column 13 is disposed on the base, a first slide rail 14 is disposed on the first support column 13, and a first UV curing component 15 and a dispensing mechanism 16 are disposed on the first slide rail 14. In this embodiment, the first bearing platform 12 is provided with a plurality of first adsorption holes 17. A plurality of first retractable positioning blocks 18 are disposed around the first bearing platform 12. A first rotating motor 19 is disposed below the first bearing platform 12 to rotate the first bearing platform 12.

[0029] The user places the LCD screen on the first carrier 12, and preliminarily fixes the LCD screen on the first carrier 12 through the adsorption force of the first adsorption hole 17, and then fixes the side of the LCD screen through the first retractable positioning block 18. The LCD screen is glued by sliding the glue dispensing mechanism 16 on the first slide rail 14. The energy of the UV lamp in the first curing component is 2500-3000j, so that the glue is semi-cured in time through the first curing component during the glue dispensing process. When one side of the LCD screen is glued, the first carrier 12 is rotated by the first rotating motor 19, thereby rotating the LCD screen, and glue is applied to the remaining sides of the LCD screen.

[0030] like Figures 1 to 3 As shown, the second UV curing device 2 includes a second base 21 and a second supporting platform 22 arranged on the second base 21, a second supporting column 23 is arranged on the base, a second slide rail 24 is arranged on the second supporting column 23, and a second UV curing component 25 and an air blowing and cooling mechanism 26 are arranged on the second slide rail 24.

[0031] The second carrying platform 22 is provided with a plurality of second adsorption holes 27. A plurality of second retractable positioning blocks 28 are arranged around the second carrying platform 22. A second rotating motor 29 is arranged below the second carrying platform 22 to rotate the second carrying platform 22.

[0032] The robot arm picks up the LCD screen from the first carrier 12 and places it on the second carrier 22, and fixes the LCD screen through the second telescopic positioning block. The LCD screen is fixed on the second carrier 22 through the adsorption force of the second adsorption hole 27, and the second UV curing part 25 slides on the second slide rail 24 to re-cure the glued part of the LCD screen. During the curing, the glued part is cooled by the air blast cooling mechanism 26. When one side of the LCD screen is glued, the second carrier 22 is rotated by the second rotating motor 29, thereby rotating the LCD screen, and glue is applied to the remaining sides of the LCD screen.

[0033] In summary: the liquid crystal screen is glued by the glue dispensing mechanism 16, and then the liquid crystal screen is preliminarily cured by the first UV curing component 15, and then the liquid crystal screen is cured again by the second UV curing component 25. By introducing the air blast cooling mechanism 26 during the secondary curing of the UV glue, the surface of the liquid crystal screen is cooled by cold air to prevent the polarizer from turning yellow due to excessive surface temperature of the liquid crystal screen caused by high-power curing.

[0034] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0035] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A device for preventing yellowing of polarizer by UV curing COF gap compensation for liquid crystal screen, characterized in that: include: A first UV curing device (1) and a second UV curing device (2) arranged in parallel; The first UV curing device (1) comprises a first base (11) and a first bearing platform (12) arranged on the first base (11); a first supporting column (13) is arranged on the base; a first slide rail (14) is arranged on the first supporting column (13); and a first UV curing component (15) and a glue dispensing mechanism (16) are arranged on the first slide rail (14); The second UV curing device (2) comprises a second base (21) and a second bearing platform (22) arranged on the second base (21); a second supporting column (23) is arranged on the base; a second slide rail (24) is arranged on the second supporting column (23); and a second UV curing component (25) and an air blowing and cooling mechanism (26) are arranged on the second slide rail (24).

2. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screens as claimed in claim 1, characterized in that: The first supporting platform (12) is provided with a plurality of first adsorption holes (17).

3. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screen as claimed in claim 2, characterized in that: A plurality of first retractable positioning blocks (18) are arranged around the first supporting platform (12).

4. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screen as claimed in claim 3, characterized in that: A first rotating motor (19) is arranged below the first carrying platform (12) to rotate the first carrying platform (12).

5. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screen as claimed in claim 4, characterized in that: The second supporting platform (22) is provided with a plurality of second adsorption holes (27).

6. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screens as claimed in claim 5, characterized in that: A plurality of second retractable positioning blocks (28) are arranged around the second supporting platform (22).

7. A device for preventing polarizer yellowing by UV curing COF gap compensation for liquid crystal screens as claimed in claim 6, characterized in that: A second rotating motor (29) is arranged below the second carrying platform (22) to rotate the second carrying platform (22).

Images