CN107132705A - Spacer material, the preparation method of spacer material, display panel and display device - Google Patents

Abstract

The invention discloses a spacer, a preparation method of the spacer, a display panel and a display device. The spacer includes: a first part and a second part; the first part is formed on the black matrix, The first part has two opposite first end faces and second end faces, and the first end face of the first part is attached to the black matrix, and the area boundary of the first end face is in contact with the first end face The area boundaries of the black matrix at the joint are coincident, and the area of the second end surface is not larger than the area of the first end surface; the second component is formed on the second end surface of the first component, and the second end surface is formed on the second end surface of the first component. The two components have opposite third end faces and fourth end faces, the third end face is attached to the second end face, and the area boundary of the third end face does not exceed the area boundary of the second end face, the first end face The area of the four end surfaces is smaller than the area of the third end surface.

Description

Spacer, preparation method of spacer, display panel, and display device

technical field

The invention relates to the technical field of displays, in particular to a spacer, a preparation method of the spacer, a display panel and a display device.

Background technique

The liquid crystal display panel is an important part of the liquid crystal display device. In the liquid crystal display panel, spacers (Support Pillars, PS) are mainly used to maintain the cell thickness of the upper and lower substrates of the display panel, so as to ensure the space for liquid crystal injection.

When the liquid crystal display panel is subjected to an external force, due to the large compression of the spacer, the liquid crystal cell is squeezed and deformed, causing the liquid crystal to diffuse to the surroundings, resulting in a phenomenon of water ripples (pooling mura) in the liquid crystal display device. Referring to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is a schematic structural diagram of a spacer in the prior art, Fig. 2 is a schematic diagram of a liquid crystal display device without an external force, and Fig. 3 is a schematic diagram of a liquid crystal display device subjected to an external force to generate pooling mura. In Fig. 1, the spacer 1' is formed on the black matrix 2'. When the liquid crystal panel is not subjected to external force, as shown in Fig. 2, the spacer 1' (not shown in Fig. 2 and Fig. 3) maintains The box is thick, and the liquid crystal 3' is between the two substrates. Since there is a gap between the polarizer 4' and the prism 5' of the backlight in the display device, when an external force is applied, refer to Figure 4, the spacer 1' is in the pressed position Compressed by a large amount of external force, the liquid crystal 3' diffuses to the surroundings along the direction of the arrow. When the liquid crystal diffuses to the edge, the gap between the polarizer 4' and the prism 5' of the backlight plate decreases, so that the box at the edge A' of the display device Thickness increases, resulting in light leakage from the pooling mura.

Contents of the invention

The present invention provides a spacer, a method for preparing the spacer, a display panel and a display device, so as to solve the problems in the prior art that the spacer is compressed by a large amount of force, and liquid crystal diffuses to the surroundings to cause light leakage in the pooling mura .

In a first aspect, the present invention provides a spacer, which is arranged between the first substrate and the second substrate of the display panel, and is formed on the black matrix of the first substrate, and the spacer includes: a first component and second part;

The first component is formed on the black matrix, the first component has two opposite first end surfaces and second end surfaces, and the first end surface of the first component is bonded to the black matrix, The area boundary of the first end surface coincides with the area boundary of the black matrix at the joint of the first end surface, and the area of the second end surface is not larger than the area of the first end surface;

The second part is formed on the second end surface of the first part, the second part has a third end surface and a fourth end surface opposite to each other, the third end surface is attached to the second end surface, and The area boundary of the third end surface does not exceed the area boundary of the second end surface, and the area of the fourth end surface is smaller than the area of the third end surface.

Optionally, a cross section of the first component along a direction perpendicular to the first substrate is rectangular.

Optionally, a cross-section of the second component along a direction perpendicular to the first substrate is an isosceles trapezoid, and the third end surface is located at a center of the second end surface.

Optionally, the area boundary of the third end surface coincides with the area boundary of the second end surface.

Optionally, the height of the first component is greater than the height of the second component, and the height of the second component satisfies a first threshold condition.

Optionally, both the first component and the second component are made of resin.

In a second aspect, the present invention provides a method for preparing a spacer, comprising:

The first part of the spacer is formed on the black matrix of the first substrate through the first patterning process; the first part has two opposite first end faces and second end faces, and the first part The first end face of the black matrix is attached to the black matrix;

A second part of the spacer is formed on the first part by a second patterning process; the second part has opposite third and fourth end faces, the third end face and the first end face Bonding of two ends;

Wherein, the area boundary of the first end face coincides with the area boundary of the black matrix at the joint of the first end face; the area boundary of the third end face does not exceed the area boundary of the second end face, and the fourth end face The area of the end surface is smaller than the area of the third end surface.

Optionally, the step of forming the first part of the spacer on the black matrix of the first substrate through the first patterning process includes:

forming a material and a photoresist layer for making the first component on the black matrix of the first substrate;

Use a first mask to expose and develop the photoresist layer, and form the first component on the black matrix of the first substrate. The mask plate of the black matrix.

In a third aspect, the present invention provides a panel, comprising a first substrate and a second substrate oppositely disposed, and the above-mentioned spacer is disposed between the first substrate and the second substrate.

In a fourth aspect, the present invention provides a display device, including the above-mentioned display panel. .

Compared with the prior art, the embodiment of the present invention has the following advantages:

The spacer is set as two parts, the first part and the second part, and the area boundary of the first end surface of the first part of the spacer coincides with the area boundary of the black matrix that is attached to it, which increases the distance between the bottom of the spacer and the second part. The contact area of the black matrix, the second part is formed on the first part, the height of the second part is reduced by setting the first part, and the area boundary of the third end face of the second part is located on the second end face of the first part Within the boundary of the region, such a structural setting greatly improves the supporting force of the spacer, so that when the spacer receives an external force, the compression amount is small, and it can solve the problem of light leakage caused by the diffusion of liquid crystals to the surrounding pooling mura.

Description of drawings

Figure 1 shows a schematic structural view of a spacer in the prior art;

Figure 2 is a schematic diagram of a liquid crystal display device without external force;

FIG. 3 is a schematic diagram of pooling mura generated by an external force on a liquid crystal display device;

FIG. 4 is a schematic structural view of a spacer according to an embodiment of the present invention;

Figure 5a shows an elastic-plastic analysis diagram of a spacer in the prior art;

Figure 5b shows an elastoplastic analysis diagram of a spacer according to an embodiment of the present invention;

Fig. 6 is a graph showing the relationship between the compression ratio and the support force under the conditions of different heights of the second part of a spacer according to an embodiment of the present invention;

FIG. 7 is a flowchart of a method for preparing a spacer according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the structure of the spacer for completing step 1 in FIG. 7 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Referring to FIG. 4 , it is a schematic structural diagram of a spacer according to an embodiment of the present invention.

The spacer is disposed between the first substrate and the second substrate of the display panel, and is formed on the black matrix 2 of the first substrate. The spacer includes a first component 101 and a second component 102 .

The first part 101 is formed on the black matrix 2, the first part 101 has two opposite first end faces and second end faces, and the first end face of the first part 101 is bonded to the black matrix 2, the first part 101 of the first part 101 The area boundary of one end surface coincides with the area boundary of the black matrix 2 where it is bonded, and the area of the second end surface of the first component 101 is not larger than the area of the first end surface;

The second part 102 is formed on the second end face of the first part 101, the second part 102 has a third end face and a fourth end face opposite, the third end face of the second part 102 is attached to the second end face of the first part 101 , the area boundary of the third end surface does not exceed the area boundary of the second end surface, and the area of the fourth end surface of the second component 102 is smaller than the area of the third end surface.

The spacer is set as two parts, the first part 101 and the second part 102, and the area boundary of the first end surface of the first part 101 of the spacer coincides with the area boundary of the black matrix 2 that is attached to it, which increases the spacer. The contact area between the bottom of the pad and the black matrix, the second component 102 is formed on the first component 101, the height of the second component 102 is reduced by the setting of the first component 101, and the area of the third end surface of the second component 102 The boundary does not exceed the area boundary of the second end surface of the first component 101. Such a structural setting greatly improves the supporting force of the spacer, so that the spacer has a small amount of compression when receiving an external force, and can solve the problem of liquid crystals spreading around. A problem that causes light leakage in pooling mura.

Further, as shown in FIG. 4 , the cross section of the first component 101 along the direction perpendicular to the first substrate is rectangular, and the shape of the first component 101 can be the same as that of the black matrix 2; the second component 102 is perpendicular to the first substrate. The interface in the substrate direction is an isosceles trapezoid, and the third end surface of the second component 102 is located at the center of the second end surface of the first component 101 . Optionally, the area boundary of the third end surface of the second component 102 may coincide with the area boundary of the second end surface of the first component 101 , such a configuration is conducive to enhancing the overall strength and stability of the entire spacer.

Referring to Fig. 5a and Fig. 5b, they are the elastic-plastic analysis diagrams of the spacers of the prior art and the present embodiment respectively, wherein the abscissa is the compression (Depth), and the ordinate is the force (Force). In the case where the two spacers have the same contact area with the second substrate, comparing the two figures shows that the spacer provided by the embodiment of the present invention has better recovery ability when compressed by an external force, and the compression amount is small . In the spacer provided by the embodiment of the present invention, the plastic ratio is greatly reduced, and almost all compressed parts are subjected to external forces, so they have relatively high supporting force and are not easily compressed.

Referring to Figure 6, it is a graph showing the relationship between the compressibility and the support force of spacers with different heights of the second part when the total height of the spacer is the same, where the abscissa is the compressibility (ΔPSH), and the ordinate is the support force (f). It can be seen from the analysis of the figure that when the compression amount is constant, the smaller the height of the second part is, the greater the supporting force of the spacer is. Therefore, the height of the second component 102 is reduced by adding the first component 101 , thereby enhancing the supporting force of the spacer. Further, the height of the first part 101 needs to be greater than the height of the second part 102, and the height of the second part 102 satisfies the first threshold condition to ensure that the spacer has a large supporting force. If the height is 3um, the threshold condition that the height (PSH2) of the second component satisfies is 0.5um≤PSH2<1.5um.

The materials of the first part and the second part of the spacer are commonly used resin materials.

It can be seen from the above that the embodiments of the present invention include the following advantages:

The spacer is set as two parts, the first part and the second part, and the area boundary of the first end surface of the first part of the spacer coincides with the area boundary of the black matrix that is attached to it, which increases the distance between the bottom of the spacer and the second part. The contact area of the black matrix, the second part is formed on the first part, the height of the second part is reduced by setting the first part, and the area boundary of the third end face of the second part is located on the second end face of the first part Within the boundary of the region, such a structural setting greatly improves the supporting force of the spacer, so that when the spacer is subjected to an external force, the compression amount is small, and it can solve the problem of light leakage caused by the diffusion of liquid crystals to the surrounding pooling mura.

Embodiment two

Referring to FIG. 7 , it is a flowchart of a method for preparing a spacer according to an embodiment of the present invention.

Step 1, forming the first part of the spacer on the black matrix of the first substrate through the first patterning process.

The first component has opposite first end surfaces and second end surfaces, and the first end surfaces of the first components are bonded to the black matrix.

Specifically include the following processes:

forming a photoresist layer for making the first component on the black matrix of the first substrate;

The photoresist layer is exposed and developed by using the first mask to form the first component on the black matrix of the first substrate, wherein the first mask is a mask for making the black matrix on the first substrate.

In this way, the mask plate of the black matrix is used to expose and develop the photoresist layer of the first part to make the first part, which ensures the contact between the area boundary of the first end face of the first part and the black matrix at the bonding place of the first end face. The boundaries of the regions are overlapped, the bonding area is large, and the supporting force of the spacer is enhanced.

A schematic structural diagram of the spacer formed after this step is shown in FIG. 8 .

Step 2, forming a second part of the spacer on the first part through a second patterning process.

The second part has a third end face and a fourth end face opposite, the third end face is attached to the second end face of the first part, wherein the area boundary of the third end face of the second part does not exceed the second end face of the first part The region boundary, the area of the fourth end surface of the second component is smaller than the area of the third end surface.

The forming process of the second component is the same as that of the prior art, and will not be repeated here.

After step 2 is completed, a schematic structural diagram of the formed spacer is shown in FIG. 4 .

It can be seen from the above that the embodiments of the present invention include the following advantages:

Use the first mask and the black matrix mask to expose and develop the photoresist layer of the first part to make the first part, which ensures that the area boundary of the first end face of the first part is bonded to the first end face The area boundaries of the black matrix overlap, the bonding area is large, and the height of the second part is reduced through the setting of the first part. This structure can effectively enhance the supporting force of the spacer, so that when the spacer is subjected to external force, The small amount of compression can solve the problem of light leakage caused by the pooling mura caused by the diffusion of liquid crystals to the surroundings.

An embodiment of the present invention also provides a display panel, including a first substrate and a second substrate oppositely arranged, and the spacer of the above-mentioned embodiment is arranged between the first substrate and the second substrate.

An embodiment of the present invention also provides a display device, including the above-mentioned display panel.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the related parts, please refer to the part of the description of the method embodiment.

Having described preferred embodiments of embodiments of the present invention, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the embodiments of the present invention.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or end-equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. a kind of spacer material, is arranged between the first substrate of display panel and second substrate, and is formed at the first substrate Black matrix on, it is characterised in that the spacer material includes：First component and second component；

The first component, is formed in the black matrix, the first component has two relative first end faces and the second end Face, and the first end face of the first component fits with the black matrix, the zone boundary of the first end face and described first The zone boundary of the black matrix of end face joint place is overlapped, and the area of the second end face is not more than the area of the first end face；

The second component, is formed in the second end face of the first component, the second component has the 3rd relative end face With the 4th end face, the 3rd end face is fitted with the second end face, and the 3rd end face zone boundary without departing from described The zone boundary of second end face, the area of the 4th end face is less than the area of the 3rd end face.

2. spacer material according to claim 1, it is characterised in that the edge of the first component is perpendicular to the first substrate The rectangular cross-section in direction.

3. spacer material according to claim 2, it is characterised in that the second component is along perpendicular to the first substrate side To section be isosceles trapezoid, and the 3rd end face be located at the second end face center.

4. spacer material according to claim 3, it is characterised in that the zone boundary of the 3rd end face and second end The zone boundary in face is overlapped.

5. spacer material according to claim 1, it is characterised in that the height of the first component is more than the second component Height, and the height ratio of the first component and the second component meets first threshold condition.

6. the spacer material according to claim any one of 1-5, it is characterised in that the first component and the second component Material be resin.

7. a kind of preparation method of spacer material, it is characterised in that including：

The first component of the spacer material is formed in the black matrix of first substrate by first time patterned process；Described first Part has two relative first end faces and second end face, and the first end face of the first component is fitted with the black matrix；

The second component of the spacer material is formed on the first component by second of patterned process；The second component There is relative the 3rd end face and the 4th end face, the 3rd end face is fitted with the second end face；

Wherein, the zone boundary of the first end face is overlapped with the zone boundary of the black matrix of the first end face joint place；Institute State zone boundary of the zone boundary without departing from the second end face of the 3rd end face, the area of the 4th end face is less than described the The area of three end faces.

8. the preparation method of spacer material according to claim 7, it is characterised in that described to pass through first time patterned process The step of first component of the spacer material is formed in the black matrix of first substrate, including：

The material and photoresist layer for making the first component are formed in the black matrix of the first substrate；

The photoresist layer is exposed and developed using the first mask plate, institute is formed in the black matrix of the first substrate First component is stated, first mask plate is the mask plate for making the black matrix on the first substrate.

9. a kind of display panel, including the first substrate and second substrate being oppositely arranged, it is characterised in that in the first substrate Set between second substrate just like the spacer material described in claim any one of 1-6.

10. a kind of display device, it is characterised in that including the display panel described in claim 9.