WO2020186559A1 - Peeling detection system, and peeling detection method for liquid crystal panel - Google Patents

Abstract

A peeling detection system, and a peeling detection method for a liquid crystal panel (90). The peeling detection system comprises an image collection apparatus (10) and an alignment film removal apparatus (20), wherein the alignment film removal apparatus (20) comprises a heating stage (21) and an alignment film remover dripping apparatus (22). When peeling detection is carried out on the liquid crystal panel (90), a second substrate (92) of the liquid crystal panel (90) is peeled from a seal (93), the image collection apparatus (10) is used to photograph a peeling area (921) of the second substrate (92), then the alignment film remover dripping apparatus (22) is used to drip an alignment film remover on the peeling area (921) of the second substrate (92) and the heating stage (21) is used to heat the second substrate (92), then the image collection apparatus (10) is used to photograph the peeling area (921) of the second substrate (92) a second time, images obtained by means of the two instances of photographing are compared, and if the images are consistent, it is determined that an alignment film (94) is peeled from the second substrate (92), otherwise, it is determined that the alignment film (94) is peeled from the seal (93); therefore, the peeling position of the liquid crystal panel (90) can be accurately and effectively determined.

Description

Peeling detection system and liquid crystal panel peeling detection method Technical field

The invention relates to the field of display technology, and in particular to a peeling detection system and a method for peeling a liquid crystal panel.

Background technique

With the development of display technology, flat display devices such as Liquid Crystal Display (LCD) have been widely used in mobile phones, TVs, etc. due to their high image quality, power saving, thin body and wide application range. Various consumer electronic products such as personal digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices.

Most of the existing liquid crystal display devices generally include: a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates. There are many small vertical and horizontal wires between the two glass substrates. The liquid crystal molecules are controlled to change direction by powering on or not to refract the light of the backlight module. Come out to produce the picture.

Usually the LCD panel is made of color film (CF, Color Filter) substrate, thin film transistor (TFT, Thin Film Transistor) substrate, liquid crystal (LC, Liquid Crystal) and seal (seal) sandwiched between the color film substrate and the thin film transistor substrate. The main function of the seal is to use its own viscosity to bond the color film substrate and the thin film transistor substrate The combination is fixed to protect the liquid crystal from external water vapor and impurities, and prevent the liquid crystal from flowing out. At the same time, usually an alignment film made of polyimide (PI) is set on the side close to the color filter substrate and the array substrate to align the liquid crystal. In the liquid crystal panel with a narrow frame, the sealant and the alignment film are present. Overlap (overlap) situation. During the use of the liquid crystal panel, if peeling of the array substrate and the color filter substrate occurs, it will have a greater impact on its quality. The prior art usually conducts peeling detection, specifically, peeling the array substrate and the color filter substrate. It also detects and analyzes the peeling interface to determine the position of the peeling interface, so as to provide a clear direction for subsequent material interface adhesion improvement. The usual practice is to use an optical microscope to detect the peeling interface, but in a liquid crystal panel with a narrow frame, because the alignment film overlaps the sealant, peeling may occur between the alignment film and the sealant, or between the alignment film and the sealant. Between the array substrate or the color filter substrate, but because the alignment film is thin, it is not easy to view under an optical microscope, which affects the accurate judgment of the peeling position.

technical problem

The purpose of the present invention is to provide a peeling detection system that can accurately and effectively determine the peeling position of the liquid crystal panel.

Another object of the present invention is to provide a method for detecting peeling of a liquid crystal panel, which can accurately and effectively determine the peeling position of the liquid crystal panel.

Technical solutions

To achieve the above objective, the present invention first provides a peeling detection system, including an image acquisition device and an alignment film removal device;

The alignment film removing device includes a heating stage and an alignment film removing droplet device located above the heating stage; the image acquisition device is located above the heating stage; the alignment film removing droplet device is used for dropping the alignment film Remove liquid.

The peeling detection system also includes a driving device; the driving device is connected to the image acquisition device and the alignment film removing droplet removing device, and is used to drive the image capturing device and the alignment film removing droplet removing device to move.

The driving device is a moving gantry.

The image acquisition device is an optical microscope;

The heating stage is a quartz heating stage.

The alignment film removal device further includes an alignment film removal liquid supply device connected to the alignment film removal droplet dropping device; the alignment film removal solution supply device is used to provide an alignment film removal solution to the alignment film removal droplet dropping device;

The alignment film removal liquid is a liquid containing hypochlorous acid groups.

The present invention also provides a peeling detection method of a liquid crystal panel, which includes the following steps:

Step S1, providing a peeling detection system and a liquid crystal panel;

The peeling detection system includes an image acquisition device and an alignment film removal device; the alignment film removal device includes a heating stage, an alignment film removal droplet device located above the heating stage; the image acquisition device is located on the heating stage Above

The liquid crystal panel includes a first substrate and a second substrate arranged oppositely, a sealant arranged between the first substrate and the second substrate, and an alignment film arranged between the sealant and the second substrate;

Step S2: Peel the sealant from the second substrate, and the position of the second substrate corresponding to the sealant forms a peeling area;

Step S3, placing the second substrate on the heating stage so that the side of the second substrate close to the sealant faces upwards before peeling off the sealant;

Step S4, using the image acquisition device to perform the first image acquisition on the peeling area of the second substrate;

Step S5, using the aligning film removing droplet device to drop the aligning film removing liquid onto the peeling area of the second substrate, and heating the second substrate with the heating stage after a preset time interval;

Step S6: Perform a second image acquisition on the peeling area of the second substrate by using the image acquisition device;

Step S7: Compare the image obtained in the first image acquisition with the image obtained in the second image acquisition. If the image obtained in the first image acquisition is consistent with the image obtained in the second image acquisition, it is determined that the alignment film is The second substrate is peeled off, otherwise it is determined that the alignment film and the sealant peel off.

One of the first substrate and the second substrate is a color filter substrate, and the other is a thin film transistor substrate.

The peeling detection system further includes a driving device; the driving device is connected with the image acquisition device and the alignment film removing droplet removing device;

Before the step S4, it further includes the step of using a driving device to drive the image capture device and the alignment film removing and droplet removing device to move above the peeling area of the second substrate;

The driving device is a moving gantry.

The image acquisition device is an optical microscope;

The heating stage is a quartz heating stage.

The alignment film removal device further includes an alignment film removal liquid supply device connected to the alignment film removal droplet dropping device;

In the step S5, the alignment film removal liquid supply device is used to provide the alignment film removal liquid droplet down device with the alignment film removal liquid;

The alignment film is made of polyimide; the alignment film removal liquid is a liquid containing hypochlorous acid groups;

The preset duration in step S5 is 2-3 minutes.

Beneficial effect

The beneficial effects of the present invention: the peeling detection system of the present invention includes an image acquisition device and an alignment film removal device, and the alignment film removal device includes a heating stage and an alignment film removal droplet drop device. When performing the peeling test of the liquid crystal panel, the second substrate of the liquid crystal panel is peeled off from the sealant, and the peeling area of the second substrate is photographed by the image capture device, and then the aligning film removing droplet device is used to drop the peeling area of the second substrate The second substrate is heated by the heating stage and the second substrate is heated by the alignment film removal liquid, and then the peeling area of the second substrate is captured for the second time by the image acquisition device. The two captured images are compared, and if they are consistent, the alignment film and The second substrate is peeled off, otherwise it is determined that the alignment film and the sealant peel off, and the peeling position of the liquid crystal panel can be accurately and effectively determined. The peeling detection method of the liquid crystal panel of the present invention can accurately and effectively determine the peeling position of the liquid crystal panel.

Description of the drawings

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only provided for reference and illustration and are not used to limit the present invention.

In the attached picture,

Figure 1 is a schematic diagram of the structure of the peeling detection system of the present invention;

2 is a flowchart of the peeling detection method of the liquid crystal panel of the present invention;

3 is a schematic diagram of the structure of the liquid crystal panel provided in step S1 of the method for detecting peeling of a liquid crystal panel of the present invention;

4 is a schematic diagram of step S2 of an embodiment of the peeling detection method of a liquid crystal panel of the present invention;

5 is a schematic diagram of step S3 and step S4 of an embodiment of a method for detecting peeling of a liquid crystal panel of the present invention;

6 is a schematic diagram of step S5 of an embodiment of the peeling detection method of a liquid crystal panel of the present invention;

FIG. 7 is a schematic diagram of step S6 of an embodiment of the peeling detection method of a liquid crystal panel of the present invention.

Embodiments of the invention

In order to further explain the technical means adopted by the present invention and its effects, the following describes in detail the preferred embodiments of the present invention and the accompanying drawings.

Please refer to the figure 1 , The present invention provides a peeling detection system, including an image acquisition device 10 And alignment film removal device 20 .

The alignment film removing device 20 Including heating stage twenty one , Located on the heating platform twenty one The upper alignment film removes the droplet device twenty two . The image acquisition device 10 On the heating stage twenty one Above. Device for removing droplets of the alignment film twenty two Used to drop the alignment film removal solution.

Specifically, please refer to the figure 1 , The peeling detection system also includes a driving device 30 . The driving device 30 With image capture device 10 And aligning film removing droplet removing device twenty two Are connected to drive the image capture device 10 And aligning film removing droplet removing device twenty two mobile.

Specifically, the driving device 30 For the mobile gantry.

Specifically, the image acquisition device 10 For the optical microscope.

Specifically, the heating stage twenty one Heating stage for quartz.

Specifically, please refer to the figure 1 , The alignment film removal device 20 Also includes droplet removal device with alignment film twenty two Connected alignment film removing liquid supply device twenty three . Alignment membrane removal liquid supply device twenty three Device for removing droplets from alignment film twenty two Provide alignment film removal solution.

Preferably, the alignment film removal liquid is a liquid containing hypochlorous acid groups.

The peeling detection system of the present invention is used for liquid crystal panel 90 Perform a peel test. Please refer to the figure 3 , The liquid crystal panel 90 Including the first substrate arranged oppositely 91 And the second substrate 92 , Located on the first substrate 91 With the second substrate 92 Box glue 93 And located in the frame glue 93 With the second substrate 92 Alignment film made of polyimide material 94 . First substrate 91 And the second substrate 92 One of them is a color film substrate, and the other is a thin film transistor substrate. 3 To map 7 The illustrated embodiment is taken as an example, and the peeling detection system of the present invention is used for liquid crystal panel 90 The specific process of peeling detection is:

First, refer to the diagram 4 , The frame glue 93 With the second substrate 92 Peeling, second substrate 92 Corresponding frame glue 93 The position forms the peeling zone 921 . In the picture 4 In the embodiment shown, the sealant 93 With the second substrate 92 When peeling, the actual peeling interface is at the sealant 93 With alignment film 94 Between, that is, frame glue 93 With alignment film 94 Peeling, alignment film 94 Stay on the second substrate 92 surface. In other embodiments of the present invention, the sealant 93 With the second substrate 92 When peeling, there is also the actual peeling interface located on the second substrate 92 With alignment film 94 Between the alignment film 94 Stay in the box glue 93 Superficial situation.

Next, please refer to the diagram 5 ，The second substrate 92 Place on the heating stage twenty one To make the second substrate 92 In with box glue 93 Near the frame glue before peeling off 93 Side up, and then use the drive 30 Drive image capture device 10 And aligning film removing droplet removing device twenty two Move to the second substrate 92 Peel zone 921 Above, using the image capture device 10 To the second substrate 92 Peel zone 921 Perform the first image acquisition. In the picture 5 In the illustrated embodiment, due to the alignment film 94 Stay on the second substrate 92 Surface, to the second substrate 92 Peel zone 921 There is an alignment film in the image collected during the first image acquisition 94 . In other embodiments of the present invention, if the sealant is 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 Surface, there is no alignment film in the image collected in the first image collection 94 .

After that, please refer to the diagram 6 , Using the alignment film to remove the droplet device twenty two To the second substrate 92 Peel zone 921 Drop the alignment film removal solution, in the figure 6 In the illustrated embodiment, due to the alignment film 94 Stay on the second substrate 92 Surface to the second substrate 92 Peel zone 921 After dropping the alignment film removal solution, the alignment film 94 And stripping zone 921 The corresponding part reacts with the alignment film removal solution after a preset period of time (for example 2-3 Minutes), using the heating stage twenty one To the second substrate 92 Heat it so that the alignment film 94 The remaining liquid after reacting with the alignment film removal liquid is volatilized, so that the second substrate 92 Peel zone 921 No alignment film 94 . In other embodiments of the present invention, if the sealant is 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 Surface, the second substrate after this step is over 92 Peel zone 921 No alignment film 94 .

Then, refer to the diagram 7 , Using image capture device 10 To the second substrate 92 Peel zone 921 Perform the second image acquisition and compare the image obtained by the first image acquisition with the image obtained by the second image acquisition. If the image obtained by the first image acquisition is consistent with the image obtained by the second image acquisition, it is determined Alignment film 94 With the second substrate 92 Peel off, otherwise determine the alignment film 94 With box glue 93 Peel off. In the picture 7 In the illustrated embodiment, since the second substrate 92 Peel zone 921 No alignment film 94 , So on the second substrate 92 Peel zone 921 There is no alignment film in the image collected during the first image acquisition 94 , So that the image obtained in the first image acquisition is inconsistent with the image obtained in the second image acquisition, and the sealant 93 With alignment film 94 Peeling, that is, the actual peeling interface is located in the sealant 93 With alignment film 94 Between, and in other embodiments of the present invention, if the sealant 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 On the surface, there is no alignment film in the image collected in the first image collection and the image collected in the second image collection. 94 , The images are consistent, and the alignment film is determined accordingly 94 With the second substrate 92 Peeling, that is, the actual peeling interface is located in the alignment film 94 With the second substrate 92 Therefore, when the liquid crystal panel with a narrow frame is peeled off, even if the sealant overlaps the alignment film, the peeling position of the liquid crystal panel can still be effectively and accurately determined, so as to provide a clear direction for subsequent material interface adhesion improvement .

In addition, the peeling detection system of the present invention can also determine whether there is peeling of the black matrix on the color filter substrate side from the color filter substrate. Specifically, the color filter substrate peeled from the thin film transistor substrate is placed on the heating stage. twenty one 上, using the image acquisition device 10 Specifically, an optical microscope photographs the black matrix area on the color filter substrate. If there is a light-transmitting area in the black matrix area, it means that the black matrix and the substrate are peeled off.

Based on the same inventive concept, please refer to the figure 2 , The present invention also provides a peeling detection method of a liquid crystal panel, including the following steps:

step S1 , Please refer to the figure 1 And figure 3 , Provide peeling detection system and LCD panel 90 .

The peeling detection system includes an image acquisition device 10 And alignment film removal device 20 . The alignment film removing device 20 Including heating stage twenty one , Located on the heating platform twenty one The upper alignment film removes the droplet device twenty two . The image acquisition device 10 On the heating stage twenty one Above.

The liquid crystal panel 90 Including the first substrate arranged oppositely 91 And the second substrate 92 , Located on the first substrate 91 With the second substrate 92 Box glue 93 And located in the frame glue 93 With the second substrate 92 Alignment film 94 .

Specifically, please refer to the figure 1 , The peeling detection system also includes a driving device 30 . The driving device 30 With image capture device 10 And aligning film removing droplet removing device twenty two Are connected to drive the image capture device 10 And aligning film removing droplet removing device twenty two mobile.

Specifically, the driving device 30 For the mobile gantry.

Specifically, the image acquisition device 10 For the optical microscope.

Specifically, the heating stage twenty one Heating stage for quartz.

Specifically, please refer to the figure 1 , The alignment film removal device 20 Also includes droplet removal device with alignment film twenty two Connected alignment film removing liquid supply device twenty three .

Specifically, the first substrate 91 And the second substrate 92 One is a color filter substrate, and the other is a thin film transistor substrate.

Specifically, the alignment film 94 The material is polyimide.

step S2 , Please refer to the figure 4 , The frame glue 93 With the second substrate 92 Peeling, second substrate 92 Corresponding frame glue 93 The position forms the peeling zone 921 .

Specifically, in the figure 4 In the embodiment shown, the sealant 93 With the second substrate 92 When peeling, the actual peeling interface is at the sealant 93 With alignment film 94 Between, that is, frame glue 93 With alignment film 94 Peeling, alignment film 94 Stay on the second substrate 92 surface. In other embodiments of the present invention, the sealant 93 With the second substrate 92 When peeling, there is also the actual peeling interface located on the second substrate 92 With alignment film 94 Between the alignment film 94 Stay in the box glue 93 Superficial situation.

step S3 , Please refer to the figure 5 ，The second substrate 92 Place on the heating stage twenty one To make the second substrate 92 In with box glue 93 Near the frame glue before peeling off 93 The side is facing up.

step S4 , Please refer to the figure 5 , Using image capture device 10 To the second substrate 92 Peel zone 921 Perform the first image acquisition.

Specifically, the steps S4 Previously also included the use of drive devices 30 Drive image capture device 10 And aligning film removing droplet removing device twenty two Move to the second substrate 92 Peel zone 921 The steps above.

Specifically, in the figure 5 In the illustrated embodiment, due to the alignment film 94 Stay on the second substrate 92 Surface, to the second substrate 92 Peel zone 921 There is an alignment film in the image collected during the first image acquisition 94 . In other embodiments of the present invention, if the sealant is 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 Surface, there is no alignment film in the image collected in the first image collection 94 .

step S5 , Please refer to the figure 6 , Using the alignment film to remove the droplet device twenty two To the second substrate 92 Peel zone 921 Drop the alignment film removal liquid, and use the heating stage after a preset time interval twenty one To the second substrate 92 Heat up.

Specifically, the steps S5 , The use of the alignment film removal liquid supply device twenty three Droplet removing device for alignment film twenty two Provide alignment film removal solution. The alignment film removal liquid is a liquid containing hypochlorous acid groups. The steps S5 The default duration in is 2-3 minute.

Specifically, in the figure 6 In the illustrated embodiment, due to the alignment film 94 Stay on the second substrate 92 Surface to the second substrate 92 Peel zone 921 After dropping the alignment film removal solution, the alignment film 94 And stripping zone 921 The corresponding part reacts with the alignment film removal solution. After a preset time interval, use the heating stage twenty one To the second substrate 92 Heat it so that the alignment film 94 The remaining liquid after reacting with the alignment film removal liquid is volatilized, so that the second substrate 92 Peel zone 921 No alignment film 94 . In other embodiments of the present invention, if the sealant is 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 Surface, the second substrate after this step is over 92 Peel zone 921 No alignment film 94 .

step S6 , Please refer to the figure 7 , Using image capture device 10 To the second substrate 92 Peel zone 921 Perform the second image acquisition.

step S7 , Compare the image obtained in the first image acquisition with the image obtained in the second image acquisition, if the image obtained in the first image acquisition is consistent with the image obtained in the second image acquisition, the alignment film is determined 94 With the second substrate 92 Peel off, otherwise determine the alignment film 94 With box glue 93 Peel off.

Specifically, in the figure 7 In the illustrated embodiment, since the second substrate 92 Peel zone 921 No alignment film 94 , So on the second substrate 92 Peel zone 921 There is no alignment film in the image collected during the first image acquisition 94 , So that the image obtained in the first image acquisition is inconsistent with the image obtained in the second image acquisition, and the sealant 93 With alignment film 94 Peeling, that is, the actual peeling interface is located in the sealant 93 With alignment film 94 Between, and in other embodiments of the present invention, if the sealant 93 With the second substrate 92 Alignment film after peeling 94 Stay in the box glue 93 On the surface, there is no alignment film in the image collected in the first image collection and the image collected in the second image collection. 94 , The images are consistent, and the alignment film is determined accordingly 94 With the second substrate 92 Peeling, that is, the actual peeling interface is located in the alignment film 94 With the second substrate 92 Therefore, when the liquid crystal panel with a narrow frame is peeled off, even if the sealant overlaps the alignment film, the peeling position of the liquid crystal panel can still be effectively and accurately determined, so as to provide a clear direction for subsequent material interface adhesion improvement .

In summary, the peeling detection system of the present invention includes an image acquisition device and an alignment film removal device, and the alignment film removal device includes a heating stage and an alignment film removal droplet drop device. When performing the peeling test of the liquid crystal panel, the second substrate of the liquid crystal panel is peeled off from the sealant, and the peeling area of the second substrate is photographed by the image capture device, and then the aligning film removing droplet device is used to drop the peeling area of the second substrate The second substrate is heated by the heating stage and the second substrate is heated by the alignment film removal liquid, and then the peeling area of the second substrate is captured for the second time by the image acquisition device. The two captured images are compared, and if they are consistent, the alignment film and The second substrate is peeled off, otherwise it is determined that the alignment film and the sealant peel off, and the peeling position of the liquid crystal panel can be accurately and effectively determined. The peeling detection method of the liquid crystal panel of the present invention can accurately and effectively determine the peeling position of the liquid crystal panel.

As mentioned above, for those of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solutions and technical ideas of the present invention, and all these changes and modifications shall fall within the protection scope of the claims of the present invention. .

Claims (10)

1. A peeling detection system, including an image acquisition device and an alignment film removal device;

   The alignment film removing device includes a heating stage and an alignment film removing droplet device located above the heating stage; the image acquisition device is located above the heating stage; the alignment film removing droplet device is used for dropping the alignment film Remove liquid.
2. The peeling detection system according to claim 1, further comprising a driving device; the driving device is connected to the image acquisition device and the alignment film removing and droplet removing device, and is used to drive the image capturing device and the alignment film removing and droplet removing device to move.
3. The peeling detection system according to claim 2, wherein the driving device is a moving gantry.
4. The peeling detection system according to claim 1, wherein the image acquisition device is an optical microscope;

   The heating stage is a quartz heating stage.
5. The peeling detection system according to claim 1, wherein the alignment film removal device further comprises an alignment film removal liquid supply device connected to the alignment film removal droplet dropping device; the alignment film removal liquid supply device is used to align the alignment film The droplet removal device provides the alignment film removal liquid;

   The alignment film removal liquid is a liquid containing hypochlorous acid groups.
6. A method for peeling off a liquid crystal panel includes the following steps:

   Step S1, providing a peeling detection system and a liquid crystal panel;

   The peeling detection system includes an image acquisition device and an alignment film removal device; the alignment film removal device includes a heating stage, an alignment film removal droplet device located above the heating stage; the image acquisition device is located on the heating stage Above

   The liquid crystal panel includes a first substrate and a second substrate arranged oppositely, a sealant arranged between the first substrate and the second substrate, and an alignment film arranged between the sealant and the second substrate;

   Step S2: Peel the sealant from the second substrate, and the position of the second substrate corresponding to the sealant forms a peeling area;

   Step S3, placing the second substrate on the heating stage so that the side of the second substrate close to the sealant faces upwards before peeling off the sealant;

   Step S4, using the image acquisition device to perform the first image acquisition on the peeling area of the second substrate;

   Step S5, using the aligning film removing droplet device to drop the aligning film removing liquid onto the peeling area of the second substrate, and heating the second substrate with the heating stage after a preset time interval;

   Step S6: Perform a second image acquisition on the peeling area of the second substrate by using the image acquisition device;

   Step S7: Compare the image obtained in the first image acquisition with the image obtained in the second image acquisition. If the image obtained in the first image acquisition is consistent with the image obtained in the second image acquisition, it is determined that the alignment film is The second substrate is peeled off, otherwise it is determined that the alignment film and the sealant peel off.
7. 7. The method for detecting peeling of a liquid crystal panel according to claim 6, wherein one of the first substrate and the second substrate is a color filter substrate, and the other is a thin film transistor substrate.
8. 7. The peeling detection method of a liquid crystal panel according to claim 6, wherein the peeling detection system further comprises a driving device; the driving device is connected to the image acquisition device and the alignment film removing droplet removing device;

   Before the step S4, it further includes the step of using a driving device to drive the image capture device and the alignment film removing and droplet removing device to move above the peeling area of the second substrate;

   The driving device is a moving gantry.
9. 7. The method for detecting peeling of a liquid crystal panel according to claim 6, wherein the image acquisition device is an optical microscope;

   The heating stage is a quartz heating stage.
10. 7. The peeling detection method of a liquid crystal panel according to claim 6, wherein the alignment film removal device further comprises an alignment film removal liquid supply device connected to the alignment film removal droplet dropping device;

    In the step S5, the alignment film removal liquid supply device is used to provide the alignment film removal liquid droplet down device with the alignment film removal liquid;

    The alignment film is made of polyimide; the alignment film removal liquid is a liquid containing hypochlorous acid groups;

    The preset duration in step S5 is 2-3 minutes.