CN104914631A - Liquid crystal display panel, preparation method thereof and display device - Google Patents

Abstract

The invention provides a liquid crystal display panel, a preparation method thereof and a display device, and belongs to the technical field of display. The liquid crystal display panel, the preparation method thereof and the display device can solve the problem that defects of liquid crystal leakage, punctures and the like are caused due to the fact that circumstances of glue disconnection, glue shortage, coarse glue and thin glue easily occur in a box alignment technology of existing liquid crystal display panels. The liquid crystal display panel uses a glue frame on a first basal plate to block liquid crystals, uses frame seal glue to bond the glue frame and a second basal plate, controls the box alignment thickness through the height of the glue frame, prevents bubbles and the circumstances of the glue disconnection, the glue shortage, the coarse glue and the thin glue from being generated in the frame seal glue after box alignment, and can prevent the defects of the punctures and the like. The preparation method of the liquid crystal display panel is simple and convenient to operate, easily controls the box alignment thickness, and can greatly reduce production cost. The liquid crystal display panel is suitable for various display devices, and specially suitable for the narrow frame display devices.

Description

A liquid crystal display panel and its manufacturing method and display device

technical field

The invention belongs to the field of display technology, and in particular relates to a liquid crystal display panel, a preparation method thereof, and a display device.

Background technique

In the manufacturing process of liquid crystal display panels, the main processes include the formation of TFT circuits and the formation of liquid crystal cells. The formation of liquid crystal cells is the cell alignment process. The cell alignment process is to prevent the liquid crystal between the array substrate and the color filter substrate from flowing out, and coat the sealant around the edges of the array substrate and the color filter substrate to form a liquid crystal cell to achieve the purpose of liquid crystal light guide and display.

Generally, in addition to the sealant used for bonding, the frame sealant needs to be evenly mixed with silicon balls. The doped silicon balls are used to support the array substrate and the color filter substrate, so that there is a certain thickness of the box after the box is aligned. The sealant is the main component of the frame sealant. Currently, there are two main types of sealants used on liquid crystal display panels, one is UV-cured sealant and the other is heat-cured sealant. Specifically, during the coating process of the sealant, the sealant is pressurized by nitrogen gas to squeeze the sealant into the pump, and the screw in the pump rotates to evenly spit out the sealant through the nozzle. After the coating of the sealant is completed, the array substrate When the box is matched with the color filter substrate, the UV pre-curing time of the frame sealant is generally about 100 seconds.

The inventors have found that there are at least the following problems in the prior art: during the box alignment process, air bubbles are generated during the coating of the frame sealant, the degassing is not complete, and there are foreign objects in the pump or the nozzle, etc., resulting in bubbles in the LCD panel. Fractured, missing, thick or thin glue of the sealing frame will lead to defects such as liquid crystal leakage and puncture.

Contents of the invention

The present invention aims at problems such as liquid crystal leakage, puncture, etc., which are prone to broken glue, missing glue, thick glue, and fine glue in the box-aligning process of the existing liquid crystal display panel, and provides a liquid crystal display panel and its preparation method and display device.

The technical solution adopted to solve the technical problems of the present invention is:

A liquid crystal display panel, comprising a first substrate, a second substrate, and a liquid crystal and a plastic frame sandwiched between the first substrate and the second substrate, the plastic frame is arranged on the first substrate, and For enclosing the liquid crystal; a sealant is provided between the plastic frame and the second substrate for bonding the plastic frame to the second substrate.

Preferably, the first substrate is a color filter substrate.

Preferably, a spacer is further included between the first substrate and the second substrate, and in a direction perpendicular to the first substrate and the second substrate, the height of the plastic frame is greater than or equal to the The height of the spacer.

Preferably, the plastic frame is formed by exposing, developing and curing photoresist.

Preferably, the photoresist is a colorless photoresist.

The present invention also provides a method for preparing a liquid crystal display panel, comprising the following steps:

forming a glue frame on the first substrate;

Coating the sealant on the plastic frame and bonding it to the second substrate;

The sealant is cured to form a liquid crystal cell.

Preferably, the coating of the sealing glue on the glue frame is done by using a rubber roller.

Preferably, a step of setting a mask is further included between the forming of the glue frame and applying the sealant on the glue frame, and the mask is used to cover the non-rubber frame parts.

Preferably, the forming of the glue frame on the first substrate specifically includes: first coating a photoresist on the first substrate, and the photoresist is exposed, developed and cured to form the glue frame.

Preferably, the manufacturing method of the liquid crystal display panel further includes the step of forming a spacer on the first substrate, and the spacer is formed synchronously with the plastic frame.

Preferably, the curing of the frame sealant includes ultraviolet pre-curing and heating curing.

The present invention also provides a display device, which includes the above-mentioned liquid crystal display panel.

The liquid crystal display panel of the present invention adopts the plastic frame on the first substrate to surround the liquid crystal, uses the sealing glue to bond the plastic frame to the second substrate, controls the thickness of the box through the height of the glue frame, and makes the sealing glue thinner, because The thickness of the sealing glue is relatively thin, so there is no need to add silicon balls, and the amount of sealing glue is small, and it is easy to achieve uniform distribution, so there will be no bubbles in it, and there will be no broken glue, missing glue, thick glue, and fine glue. Can avoid puncture and other defects. The preparation method of the liquid crystal display panel of the present invention is simple and convenient to operate, easy to control the thickness of the cell, and can greatly reduce the production cost. The liquid crystal display panel of the present invention is suitable for various display devices, especially suitable for narrow frame display devices.

Description of drawings

1 is a schematic cross-sectional view of a liquid crystal display panel according to Embodiment 2 of the present invention;

Fig. 2 is the three-dimensional schematic diagram of the plastic frame of the liquid crystal display panel of the embodiment 2 of the present invention;

3 is a schematic diagram of coating a frame sealant on a liquid crystal display panel according to Embodiment 2 of the present invention;

FIG. 4 is another schematic diagram of coating a frame sealant on a liquid crystal display panel according to Embodiment 2 of the present invention;

5 is a schematic diagram of a liquid crystal display panel cell-to-cell process according to Embodiment 2 of the present invention;

Wherein, reference signs are: 1. first substrate; 2. photoresist; 21. plastic frame; 31. exposure mask; 3. mask; 4. rubber roller; 5. sealing glue; 6. ultraviolet lamp ; 7, the second substrate; 8, liquid crystal.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

This embodiment provides a liquid crystal display panel, which includes a first substrate, a second substrate, and a liquid crystal and a plastic frame sandwiched between the first substrate and the second substrate. Blocking the liquid crystal; a sealant is provided between the plastic frame and the second substrate for bonding the plastic frame to the second substrate.

In the liquid crystal display panel of this embodiment, the plastic frame on the first substrate is used to surround the liquid crystal, the plastic frame is bonded to the second substrate by the sealing glue, the thickness of the box is controlled by the height of the glue frame, and the sealing glue after the box is aligned There will be no air bubbles, broken glue, missing glue, thick glue, and fine glue in the glue, which can avoid puncture and other defects. The preparation method of the liquid crystal display panel of the present invention is simple and convenient to operate, easy to control the thickness of the cell, and can greatly reduce the production cost. The liquid crystal display panel of the present invention is suitable for various display devices, especially suitable for narrow frame display devices.

Example 2:

This embodiment provides a liquid crystal display panel, as shown in Figures 1-5, comprising a first substrate 1, a second substrate 7, and a liquid crystal 8 and a plastic frame 21 sandwiched between the first substrate 1 and the second substrate 7, The plastic frame 21 is disposed on the first substrate 1 for surrounding the liquid crystal 8 ; a sealant 5 is provided between the plastic frame 21 and the second substrate 7 for bonding the plastic frame 21 and the second substrate 7 .

That is to say, in this embodiment, the plastic frame 21 is fixedly arranged on the first substrate 1 , and then the plastic frame 21 is bonded to the second substrate 7 with the sealant 5 . In this way, the thickness of the glue frame 21 can be controlled conveniently, so as to avoid defects such as glue leakage, puncture, etc. caused by the sealing glue 5 breaking, missing, thick glue, and fine glue in the process of forming the liquid crystal cell, so that the liquid crystal can be formed. The part of the box thickness is more stable.

Wherein, the plastic frame 21 only needs to be able to surround the liquid crystal 8 therein, and the plastic frame 21 can be provided only on the outermost circle of the liquid crystal display panel, that is to say, the top view of the plastic frame 21 is a rectangle. Alternatively, as shown in FIG. 5 , a plurality of small frames may be provided to enclose the liquid crystal 8 in the multiple small frames respectively. This method is generally applicable to large liquid crystal display panels, such as television sets. Of course, the method as shown in FIG. 2 can also be used. The plastic frames 21 of a plurality of liquid crystal display panels are made together, and can be cut and divided during use. This method is usually suitable for small liquid crystal display panels, such as mobile phones.

Preferably, the first substrate 1 is a color filter substrate.

That is to say, the operation process of making the plastic frame 21 on the color filter substrate is simpler than that of making the plastic frame 21 on the array substrate.

Preferably, a spacer (not shown in the figure) is further included between the first substrate 1 and the second substrate 7, and in the direction perpendicular to the first substrate 1 and the second substrate 7, the height of the plastic frame 21 is greater than or equal to The height of the spacer.

Preferably, the glue frame 21 is formed by exposing, developing and curing the photoresist 2 .

That is to say, as shown in FIG. 2 , a corresponding exposure mask 31 is set, and the rubber frame 21 fixed on the first substrate 1 is formed by exposing and developing the photoresist 2. Such a process design is easy to implement and has various implementation modes. , Different liquid crystal display panel products can choose different implementation modes according to the characteristics of the product itself; the plastic frame 21 formed by the photoresist 2 has strong stability, strong impact resistance, and good controllability to the thickness of the liquid crystal cell.

Preferably, the photoresist 2 is a colorless photoresist.

Example 3:

This embodiment provides a method for preparing a liquid crystal display panel, comprising the following steps:

forming a glue frame 21 on the first substrate 1;

Coating the sealant 5 on the glue frame 21 and bonding it to the second substrate 7;

The sealant 5 is cured to form a liquid crystal cell.

Preferably, forming the glue frame 21 on the first substrate 1 specifically includes: coating the photoresist 2 on the first substrate 1 first, and the photoresist 2 is exposed, developed and cured to form the glue frame 21 .

That is to say, by setting the process parameters of exposure and development of the corresponding photoresist 2 according to the needs of different plastic frames of liquid crystal display panel products, a stable plastic frame 21 can be formed on the first substrate 1 . Preferably, the photoresist 2 can be cured by using an ultraviolet lamp 6 as shown in FIG. 2 , or by heat curing.

Preferably, a step of setting a mask 3 is further included between forming the glue frame 21 and applying the sealant 5 on the glue frame 21 , the mask 3 is used to cover the non-rubber frame parts.

That is to say, before coating the sealant 5, a mask 3 is set on the non-frame portion to cover the non-frame portion, and the mask 3 is only opened at the portion 21 of the frame, so that the sealant 5 passes through the opening during coating. Enter the position of the glue frame 21, so that it is only coated on the glue frame 21. In this way, the performance of the liquid crystal display panel can be prevented from being coated with the sealing glue 5 on the non-plastic frame parts, and the production speed can be accelerated.

Preferably, the coating of the sealing glue 5 on the glue frame 21 is done by using a rubber roller 4 for coating.

That is to say, as shown in FIG. 3 and FIG. 4 , the rubber roller 4 can be used to evenly coat the frame sealing glue 5 along a certain direction, so that the glue frame 21 is bonded to the second substrate 7 . Specifically, since the glue frame 21 is distributed along two directions, the coating is performed twice, each time coating one direction of the mask opening, so that the glue frame 21 is coated with the sealant 5 . The reason for this is that the thin openings are not easy to paint in, and the method of horizontal and vertical rows is adopted. At the same time, as shown in Figure 3 and Figure 4, the sealing glue 5 is placed next to the rubber roller 4, and the rubber roller 4 rolls Frame sealing glue 5 is glued on it at the time, is coated on the glue frame 21 afterwards, and coating is convenient, fast, and effect is good.

Preferably, the manufacturing method of the liquid crystal display panel further includes the step of forming a spacer on the first substrate 1 , and the spacer is formed synchronously with the plastic frame 21 .

That is to say, the plastic frame 21 is made at the same time as the spacer is formed, so that the operation process steps are simple and the production cost is saved.

Preferably, the curing of the frame sealant 5 includes ultraviolet pre-curing and heating curing.

That is to say, the curing of the frame sealant 5 adopts a two-step curing method, first ultraviolet pre-curing and then heat curing.

Obviously, many changes can be made to the specific implementation of the above-mentioned embodiments; for example, making the plastic frame 21 on the array substrate, or coating the sealing glue 5 on the plastic frame 21 with other brushing methods are all within the scope of the present invention. within the scope of protection.

Example 4:

This embodiment provides a display device, which includes the liquid crystal display panel of Embodiment 2. The display device may be any product or component with a display function, such as a liquid crystal display panel, electronic paper, a mobile phone, a tablet computer, a television set, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (12)

1. a display panels, is characterized in that, comprise first substrate, second substrate and the liquid crystal be clipped between described first substrate and described second substrate and glue frame, described glue frame is located on described first substrate, for enclosing liquid crystal; Sealed plastic box is provided with, for described glue frame and described second substrate being bonded between described glue frame and described second substrate.

2. display panels according to claim 1, is characterized in that, described first substrate is color membrane substrates.

3. display panels according to claim 1, it is characterized in that, also comprise chock insulator matter between described first substrate and described second substrate, perpendicular on described first substrate and described second substrate direction, the height of described glue frame is more than or equal to the height of described chock insulator matter.

4. display panels according to claim 1, is characterized in that, described glue frame is formed by after photoresist exposure imaging also solidification.

5. display panels according to claim 4, is characterized in that, described photoresist is colourless photoresist.

6. a preparation method for display panels, is characterized in that, comprises the following steps:

Form glue frame on the first substrate;

Bond with second substrate after described glue frame is coated with sealed plastic box;

Described sealed plastic box is solidified, forms liquid crystal cell.

7. the preparation method of display panels according to claim 6, is characterized in that, described be coated with on glue frame described sealed plastic box be adopt rubber roll be coated with.

8. the preparation method of display panels according to claim 6, is characterized in that, is coated with at described formation glue frame and on described glue frame the step also comprising between sealed plastic box and arrange mask, and described mask is used for non-glue frame position to cover.

9. the preparation method of display panels according to claim 6, it is characterized in that, the described glue frame that formed on the first substrate specifically comprises: first on described first substrate, be coated with photoresist, described photoresist forms described glue frame after exposure imaging also solidification.

10. the preparation method of display panels according to claim 6, is characterized in that, is also included in the step described first substrate being formed chock insulator matter, and described chock insulator matter and described glue frame are synchronously formed.

The preparation method of 11. display panels according to claim 6, is characterized in that, described sealed plastic box solidification comprises ultraviolet precuring and is heating and curing.

12. 1 kinds of display device, is characterized in that, comprise the display panels described in any one of claim 1-5.