CN100373224C - Assembling equipment and method for liquid crystal display - Google Patents

Abstract

The invention discloses an assembling device and an assembling method of a liquid crystal display, wherein in the process of assembling a liquid crystal panel and a backlight module, ion airflow is blown in for cleaning, and the method can be carried out by the assembling device which comprises a fixing device, a lifting platform and an ion dust removal device. The fixing device has a plurality of vacuum suction nozzles for fixing a liquid crystal panel. And the lifting platform is vertically arranged below the fixing device and used for bearing a backlight module so as to adjust the distance between the liquid crystal panel and the backlight module. The ion dust removal device is arranged on the side edges of the lifting platform and the fixing device, can blow out ion airflow, and can simultaneously remove particles and static charges on the surfaces of the liquid crystal panel and the backlight module in the assembling process.

Description

A kind of liquid crystal display assembly equipment and assembly method thereof

technical field

The invention relates to an assembly equipment and an assembly method suitable for liquid crystal displays, in particular to an assembly method and equipment that can be cleaned during assembly.

Background technique

Today, the main manufacturing process of thin film transistor liquid crystal display (TFT-LCD) can be divided into three stages: First, thin film transistors must be formed on a glass substrate to form an array substrate with many thin film transistors arranged in an array on the surface, generally called an array Process (Array).

The second step is to bond the aforementioned array substrate and a filter substrate, and then pour liquid crystal into it to form a liquid crystal panel, which is called a liquid crystal panel manufacturing process (Cell).

Finally, the LCD panel is combined with the backlight module, driver IC and various components, which is called Module Assembly.

In module assembly, when assembling the backlight module or the liquid crystal panel, the liquid crystal panel is stacked on the correct position above the backlight module, and then fitted and fixed. And if during the assembly process, the particles on the surface of the backlight module or the liquid crystal panel are not removed, then after the assembly is completed, the particles stored between the two will have a negative impact on the optical characteristics of the liquid crystal display. .

Therefore, in the current assembly process, the backlight module and the liquid crystal panel are each pasted with a protective film, and the protective film is not removed until the assembly is about to be performed. In addition, in the assembly process, a program for removing particles is added, so that the assembly process is mainly carried out in the following steps:

a. Place the backlight module on the work platform, tear off the protective film on the surface of the backlight module, light the backlight module, and use the light provided by the backlight module to manually detect whether there are particles attached to the surface of the backlight module. If particle adhesion is found, stick the particle with a sticky stick.

b. Tear off the protective film on the surface of the liquid crystal panel, and take it in front of the ion fan to blow off the particles attached to the surface of the liquid crystal panel, and then stack the liquid crystal panel on the backlight module.

However, the aforementioned assembly method has many disadvantages. For example:

1. It takes a lot of manpower to check whether there are particles on the surface of the backlight module with the naked eye. This method is not only easy to miss, but also greatly increases the production cost and reduces the production efficiency.

2. When the personnel find the particles, they should be removed with sticky sticks. During the removal process, the optical film on the surface of the backlight module may be scratched due to personnel negligence (such as improper force or wrong direction), and the Affects optical quality. In addition, in practice, the sticky stick will not be replaced once it is stained with dirt particles, but is often replaced only after the dirt has accumulated to a certain extent. In this way, it is very likely that the particles of the sticky stick will stick repeatedly, which cannot ensure the cleanliness of the product.

3. After tearing off the protective film of the LCD panel, although the surface of the LCD panel is cleaned with an ion fan, the cleaning angle, time, and the ion fan itself may be a pollution source of dirty particles. After cleaning with an ion fan, particles may still remain.

4. In the process of tearing off the protective film of the liquid crystal panel and the backlight module, a large amount of static electricity will accumulate on the surface, but it has not been properly removed, so that the optical film in the backlight module is easily attracted by the static electricity of the liquid crystal panel , resulting in distortion.

Therefore, how to get rid of the aforementioned disadvantages and increase the efficiency of assembling the liquid crystal panel and the backlight module is the direction that those skilled in the art are working on.

Contents of the invention

The object of the present invention is to provide a liquid crystal display assembly equipment and its assembly method, which can clean the liquid crystal panel and backlight module at the same time during the process of assembling liquid crystal panel and backlight module, and remove the particles and accumulated static electricity on the surface of the liquid crystal panel and backlight module. charge.

In order to achieve the above object, the present invention proposes an assembly device for a liquid crystal display, by which the assembly device and the aforementioned assembly method can be used to assemble the liquid crystal panel and the backlight module; the assembly device includes a fixing device, a The lifting platform and an ion dust removal device; the fixing device, which has a plurality of vacuum nozzles, can be used to fix a liquid crystal panel; the lifting platform is vertically arranged under the fixing device, and is used to carry a backlight module, thereby adjusting the liquid crystal panel and the backlight The distance between the modules; the ion dust removal device is installed on the side of the lifting platform and the fixing device, which can blow out an ion airflow to remove surface particles and static charges on both the liquid crystal panel and the backlight module.

The present invention also proposes an assembling method for assembling a liquid crystal panel and a backlight module, the assembling method includes the following steps: respectively fixing the liquid crystal panel and the backlight module on a fixing device and a lifting platform, so that The liquid crystal panel and the backlight module face up and down, and there is a distance between the two; an ion airflow is blown to the space between the liquid crystal panel and the backlight module through an ion dust removal device arranged on the side of the fixing device and the lifting platform During the process, remove the particles on the surface of the backlight module and the liquid crystal panel and neutralize the static charge; adjust the lifting platform so that the liquid crystal panel rests on the backlight module; and combine the liquid crystal panel and the backlight module .

To sum up, the present invention can effectively remove the particles between the liquid crystal panel and the backlight module by blowing the above-mentioned ion air flow between the two, and can also neutralize the static charges on the respective surfaces of the two at the same time. In addition, because it also has the function of cleaning while assembling, the steps of assembling and cleaning can be effectively integrated. In addition to saving time, it does not need to consume a lot of manpower for cleaning; and, after cleaning the two simultaneously, It is assembled immediately to ensure that the backlight module and LCD panel will not be polluted by particles again after cleaning.

Attached description

FIG. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic top view of another embodiment of the present invention.

Fig. 3 is a schematic top view of another embodiment of the present invention.

Fig. 4 is a schematic side view of another embodiment of the present invention.

Explanation of reference signs:

2 Assembly equipment 231 first ion air gun

10 LCD panel 232 second ion air gun

11 backlight module 233 third ion air gun

21 Fixture H distance height

22 Lifting platform A1 first included angle

23 ion dust removal equipment A2 second angle

211 vacuum nozzle A3 third angle

230 shroud

Detailed ways

Please refer to FIG. 1 , which is an embodiment of the assembly equipment of the present invention. In this embodiment, it can be used to assemble a liquid crystal panel 10 and a backlight module 11 .

The assembly equipment 2 includes a fixing device 21 , a lifting platform 22 and an ion dust removal device 23 .

The fixing device 21 is used to fix the liquid crystal panel 10 during the assembly process. In this embodiment, it is a mechanical arm, one end of which can be lifted up and down to change its position, and this end has a plurality of vacuum suction nozzles 211, which can provide appropriate suction force through the vacuum suction nozzles 211. Of course, other similar devices can also be used to provide suction or clamping force to fix the liquid crystal panel.

The lifting platform 22 is used to carry a backlight module 11 during the assembly process, and is vertically arranged directly under the fixing device 21 . It can be lifted up and down to change the distance between the liquid crystal panel 10 and the backlight module 11 .

The ion dust removal device 23 is arranged on the side of the lifting platform 22 and the fixing device 21, and has a shroud 230 and a first ion air gun 231. An ion airflow can be generated by the first ion air gun 231 and blown out through the shroud. Of course, the shape of the wind deflector 230 can be designed in different ways according to different needs, for example, the air outlet opening of the wind deflector 230 can be gradually reduced, so that the blown airflow can be concentrated.

Again, this first ion air gun 231 can be connected with a gas flow storage source (not shown in the figure), and the gas flowing in the first ion air gun 231 is ionized and then blown out. In practice, a switch can be set to determine Whether the ion dust removal device 23 is activated or not.

When the assembly equipment 2 of this embodiment is used for the assembly process of the liquid crystal panel 10 and the backlight module 11, the following steps can be performed:

a. Place the backlight module 11 on the lifting platform 22 and tear off the protective film on its surface.

b. After tearing off the protective film on the surface of the liquid crystal panel 10 , it is stacked on the backlight module 11 at a correct position.

c. Adjust the position of the fixing device 21 (such as a mechanical arm), so that the vacuum suction nozzle 211 at the end can suck up the liquid crystal panel 10 to fix the liquid crystal panel 10 .

d. Lower the lifting platform 22 and keep a distance between them.

e. Turn on the switch, the ion dust removal device 23 starts to operate, and the ion airflow blown out by the first ion air gun 231 is blown out through the air guide cover 230 and blows between the liquid crystal panel 10 and the backlight module 11 .

f. After the removal of particles is completed, lift the lifting platform 22 to return the backlight module 11 to the initial position, that is, the liquid crystal panel 10 is stacked on the backlight module 11, and can be fitted and fixed in the future.

By blowing the aforementioned ion air flow between the liquid crystal panel 10 and the backlight module 11 , particles between the two can be effectively removed, and static charges on the respective surfaces of the two can be neutralized at the same time. In addition, because it also has the function of cleaning while assembling, the steps of assembling and cleaning can be effectively integrated. In addition to saving time, it does not need to consume a lot of manpower for cleaning; and, after cleaning the two simultaneously, The pre-assembly can ensure that the backlight module 11 and the liquid crystal panel 10 will not be polluted by particles again after cleaning.

However, in this embodiment, before the liquid crystal panel 10 rests against the backlight module 11 again, the ion airflow continues to blow between the liquid crystal panel 10 and the backlight module 11 to ensure a clean assembly process. In a preferred embodiment, in order to achieve a better cleaning effect, after the lifting platform 22 descends, the ion air flow is blown into the gap between the two for a period of time (for example, after a few seconds), and then the lifting platform 22 rises, so that the liquid crystal panel 10 rests on the backlight module 11.

In addition, in order to achieve a better static elimination effect, when the distance H between the liquid crystal panel 10 and the backlight module 11 is 10 mm, an ion airflow can be blown in to achieve a better cleaning effect.

Please refer to the table below, as shown in the table below, when the liquid crystal panel 10 and the backlight module 11 are separated by different distances, and when the ion airflow is blown in, the three measurement points 1 located at different positions between the two , 2, 3, the time required for the measured static voltage to drop from 1000 volts to 0 volts.

Location 5mm 10mm 15mm 20mm 25mm 1 2.1 1.4 1.6 1.7 2.5 2 1.6 1.1 1.4 1.7 2.1 3 2.1 1.3 1.5 2.0 2.2 Avg(s) 1.93 1.27 1.50 1.80 2.27

It can be seen from the table that although the static electricity can be quickly eliminated when the distance between the two is 5mm-25mm, the accumulated static charge can be eliminated in a short time when the distance between the two is 10mm.

In addition, as the size of the liquid crystal display used is different, there may be corresponding changes. Please refer to FIG. 2 , which is a schematic top view of an embodiment of the assembly device of the present invention, and in order to facilitate the display of the airflow direction therein, the liquid crystal panel 10 is not shown, but only the backlight module 11 is shown.

In this embodiment, in order to make the blown ion air flow cover a larger area more uniformly, the ion dust removal device 23 has a second ion air gun 232 and a third ion air gun 233 in addition to a first ion air gun 231 .

The three ion air guns in the ion dust removal device 23 are arranged parallel to each other, and when the airflows blown out are parallel to each other when blowing out from the shroud 230, the air pressure around the airflow is relatively low when the ion airflow flows, and it is separated from the backlight module 11. The pressure of the side air is different. Therefore, the air on both sides of the backlight module 11 is easy to pour in from both sides, and particles are brought in, so that the particles are easy to appear on the two sides of the backlight module 11 .

For this reason, the exit directions of the three ion air guns can be directed in different directions. Please refer to Fig. 3, it is the top view schematic diagram of this three ion air guns in the ion dust removal device, as shown in the figure, the second ion air gun 232 is positioned at the first ion air gun 231 side, the muzzle direction of the second ion air gun 232 is in line with the first The direction of the muzzle of the ion air gun 231 has a first angle A1 between them. The third ion air gun 233 is located on the other side of the first ion air gun 231 , and there is a second angle A2 between the muzzle direction of the third ion air gun 233 and the muzzle direction of the first ion air gun 231 .

Through this fan-like arrangement, the airflow blown out by the air guide cover 230 can also be blown out in a fan shape, so as to prevent the air on both sides of the backlight module 11 from being poured in when the ion airflow is blown in. Moreover, although the angle range between the first included angle A1 and the second included angle A2 is between 2 degrees and 15 degrees, both sides of the air can be effectively prevented from entering, but between the first included angle A1 and the second included angle A2, When both are 2.5 degrees, better cleaning effect can be achieved, and the defective rate containing particles between the two will drop from 2.69% (when the three ion guns are arranged in parallel to each other) to 1.91% (the first included angle A1 and the second angle) When the two included angles A2 are both 2.5 degrees).

Please continue to refer to FIG. 4 , which is a schematic side view of an embodiment of the assembly device of the present invention. In order to obtain a better cleaning effect, in this embodiment, when the ion air flow is blown between the liquid crystal panel and the backlight module, the direction in which the ion air flow is blown is sandwiched between the surface of the backlight module or the surface of the liquid crystal panel. There is an angle of inclination.

That is, the air outlet of the air guide cover 230 of the ion dust removal device 23 is towards the backlight module 11 or towards the liquid crystal panel 10, so that the direction D in which the air guide cover 230 is blown out is in line with the surface of the backlight module 11 or the liquid crystal panel 10. The surface is sandwiched by an inclination angle A3, so that the ion airflow does not pass through directly in the direction parallel to the backlight module 11 or the surface of the liquid crystal panel 10; The contact opportunity of the module 11 and the liquid crystal panel 10 . The above-mentioned inclination angle A3 is more preferably 10 degrees.

From the above examples, it can be seen that the present invention can not only effectively remove particles during the assembly process of the liquid crystal panel 10 and the backlight module 11 , but also neutralize the static charges on the respective surfaces of the two at the same time. In addition, the assembly and cleaning steps are integrated at the same time, saving a lot of time and manpower, and ensuring the cleanliness of the assembly process. Compared with known assembly equipment, it is a considerable improvement. Those skilled in the art can better understand the spirit of the present invention and its other advantages or other functional applications after reading this specification and the above embodiments.

The above is to use a preferred embodiment and different embodiments to describe the present invention in detail, and it is not intended to limit the scope of the present invention, and those who are familiar with the art can understand that it is appropriate to make slight modifications without departing from the present invention. The spirit and scope of the invention.

Claims (10)

1. An assembly device for a liquid crystal display, used to assemble a liquid crystal panel and a backlight module, comprising: A fixing device has a plurality of vacuum suction nozzles, which can be used to fix the liquid crystal panel; a lifting platform, vertically arranged under the fixing device, used to carry the backlight module, so as to adjust the distance between the liquid crystal panel and the backlight module; and An ion dust removal device is arranged on the side of the lifting platform and the fixing device, has a guide cover and a first ion air gun, generates an ion air flow through the first ion air gun, and blows it out through the guide cover to remove Surface particles and electrostatic charge of both the liquid crystal panel and the backlight module. 2 . The assembly device according to claim 1 , wherein the airflow direction of the shroud and the surface of the backlight module form an oblique angle. 3. The assembly device according to claim 1, wherein the ion dust removal device further has a second ion air gun and a third ion air gun, the second ion air gun is located on the left side of the first ion air gun, and the first ion air gun is located on the left side of the first ion air gun. There is a first angle between the muzzle direction of the two ion air guns and the muzzle direction of the first ion air gun, the third ion air gun is located on the right side of the first ion air gun, and the gun of the third ion air gun There is a second included angle between the mouth direction and the muzzle direction of the first ion air gun. 4. The assembly device according to claim 3, wherein the first included angle is 2 degrees to 15 degrees, and the second included angle is 2 degrees to 15 degrees. 5. The assembly device according to claim 3, wherein the first included angle is 2.5 degrees, and the second included angle is 2.5 degrees. 6. An assembly method for assembling a liquid crystal panel and a backlight module, the assembly method comprising the following steps: respectively fixing the liquid crystal panel and the backlight module on a fixing device and a lifting platform, so that the liquid crystal panel and the backlight module face each other up and down, and there is a distance between them; Blow an ion airflow between the liquid crystal panel and the backlight module through an ion dust removal device arranged on the side of the fixing device and the lifting platform, to remove and neutralize the particles on the surfaces of the backlight module and the liquid crystal panel electrostatic charge; adjusting the lifting platform so that the liquid crystal panel rests on the backlight module; and Combining the liquid crystal panel and the backlight module. 7. The assembling method according to claim 6, further comprising a step of tearing off the protective film on the backlight module and the surface of the liquid crystal panel before fixing the backlight module. 8. The assembling method according to claim 6, wherein before the liquid crystal panel rests on the backlight module, the ion air flow is continuously blown between the liquid crystal panel and the backlight module. 9. The assembly method according to claim 6, wherein before the liquid crystal panel rests on the backlight module, the ion air flow is continuously blown between the liquid crystal panel and the backlight module, and passes through a period of time. After a certain time, the liquid crystal panel is supported on the backlight module. 10. The assembly method according to claim 6, wherein when the ion air flow is blown between the liquid crystal panel and the backlight module, the direction of the ion air flow and the surface of the backlight module have an oblique angle .

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