CN100388103C - Display panel with spacer applied - Google Patents

Abstract

A display panel, comprising: a first substrate; a second substrate; and a spacer, the spacer comprising: the bottom is arranged on part of the first substrate; and a neck portion disposed on the upper surface of the bottom portion, wherein a contact area of a lower surface of the neck portion with the bottom portion is smaller than a contact area of the lower surface of the bottom portion with the first substrate.

Description

Display panel with spacer applied

technical field

The invention relates to a display panel using a spacer, and in particular to a liquid crystal display panel with high pressure resistance.

Background technique

Liquid crystal display panels have replaced traditional cathode vacuum tube displays as a new generation of mainstream displays. The structure of the liquid crystal display panel is mainly composed of two glass substrates, and the liquid crystal is poured into the space formed by the two glass substrates.

Currently, liquid crystal display panels often use one drop filling (ODF) as the main liquid crystal filling process during production. In the ODF process, first, a sealant is coated around the surface of the thin film transistor substrate or the color filter substrate. Next, in a vacuum, the liquid crystal is dropped from above the surface of the thin film transistor substrate or the color filter substrate coated with the sealant, so that the liquid crystal is distributed in the area surrounded by the sealant. Then, the thin film transistor substrate and the color filter substrate are assembled. Then, return to the normal atmospheric pressure, and utilize an atmospheric pressure to combine the thin film transistor substrate and the color filter substrate into a liquid crystal display panel. Since the color filter substrate has a spacer, the spacer is used to provide a cell gap (cellgap) between the thin film transistor substrate and the color filter substrate after the thin film transistor substrate and the color filter substrate are combined, so that the liquid crystal can Distributed between the thin film transistor substrate and the color filter substrate.

In the liquid crystal dropping method, if the amount of liquid crystal and the height and design of the spacer are poorly matched, the liquid crystal display panel is prone to the problem of vacuum bubbles; at high temperature, it is easy to cause uneven cell gap between the two substrates due to liquid crystal volume expansion, resulting in a picture The phenomenon of uneven color (Mura). Therefore, the design of increasing the flexibility of the spacer will be beneficial to the matching of the amount of liquid crystal and the cell gap, and solve the above-mentioned problems.

However, the pressure resistance of the traditional spacer is poor, resulting in defects of the liquid crystal display panel when the liquid crystal display panel is subjected to great external pressure, which has a great impact on the yield.

Contents of the invention

Therefore, the object of the present invention is to provide a spacer that can be made soft in the liquid crystal injection process to facilitate the proper matching of the amount of liquid crystal and the cell gap. In addition, after the thin film transistor substrate and the color filter substrate are assembled, the spacer It can resist external pressure applied to the liquid crystal display panel, and the spacer can be a photoresist spacer.

According to the object of the present invention, a spacer is provided, which is disposed between the first substrate and the second substrate. Spacers include: bottom and neck. The bottom is disposed on part of the first substrate. The neck is arranged on the bottom, the contact area between the lower surface of the neck and the bottom is smaller than the contact area between the lower surface of the bottom and the first substrate, and the spacer can be a photoresist spacer, and the bottom and the neck can be integrally formed.

According to the object of the present invention, a spacer is further provided, which is disposed between the first substrate and the second substrate. The spacer includes a base and a neck. The bottom is disposed on part of the first substrate. The neck is disposed on part of the second substrate, the contact area between the neck and the bottom is smaller than the contact area between the bottom and the first substrate, and the spacer can be a photoresist spacer, and the bottom and the neck can be integrally formed.

According to another object of the present invention, a method for forming a spacer is proposed. The spacer is formed between the first substrate and the second substrate. The forming method includes: firstly, forming the bottom on the first substrate. Finally, a neck is formed on the bottom, and the contact area between the neck and the bottom is smaller than the contact area between the bottom and the first substrate.

According to another object of the present invention, a method for manufacturing a liquid crystal display is proposed. The spacer is formed between the first substrate and the second substrate. The forming method includes: firstly, forming the bottom on the first substrate. Next, form a neck on the second substrate. Finally, the first substrate and the second substrate are combined, wherein the contact area between the neck and the bottom is smaller than the contact area between the bottom and the first substrate.

Description of drawings

In order to make the above-mentioned purposes, features, and advantages of the present invention more comprehensible, a preferred embodiment is specifically cited below, together with the accompanying drawings, as follows:

FIG. 1A depicts a cross-sectional view of two substrates of a liquid crystal display panel before assembly according to a first embodiment of the present invention.

FIG. 1B depicts a cross-sectional view of the assembled state of the two substrates of the liquid crystal display panel according to FIG. 1A .

FIG. 2 depicts a cross-sectional view of two substrates of a liquid crystal display panel before assembly according to a second embodiment of the present invention.

FIG. 3 depicts a cross-sectional view of two substrates of a liquid crystal display panel before assembly according to a third embodiment of the present invention.

FIG. 4A depicts a cross-sectional view of a neck that is simultaneously in contact with the bottom and the second substrate.

FIG. 4B depicts a cross-sectional view of two necks in contact with the second substrate at the same time.

FIG. 5 depicts a flow chart of a spacer forming method.

FIG. 6 depicts a flow chart of a liquid crystal display manufacturing method.

FIG. 7 depicts the stress-strain curve of the spacer.

Explanation of reference signs

100A, 200A: LCD panel

101a, 201, 301: first substrate

102a, 202, 302: second substrate

103, 203, 303: surface

104, 204, 304, 404: Spacers

104a1, 204a, 304a: Bottom

104a2, 204b, 304b, 404b: Neck

304c: Affiliated Department

404c: Second neck

430: space

106a, 206, 306: bottom upper surface

108a: upper surface of the neck

208, 308: lower surface of the neck

312: upper surface of appendage

110a, 210: normal direction

D: cell gap

Detailed ways

first embodiment

Please refer to FIG. 1A , which depicts a cross-sectional view of the state of the two substrates of the liquid crystal display panel before assembly according to the first embodiment of the present invention. In FIG. 1A , a liquid crystal display panel 100A includes a first substrate 101 a , a second substrate 102 a and spacers 104 . The first substrate 101a and the second substrate 102a can be a TFT substrate and a color filter substrate respectively, or the first substrate 101a and the second substrate 102a can be a color filter substrate and a TFT substrate respectively. The spacer 104 includes a bottom 104a1 and a neck 104a2. The bottom 104a1 is disposed on a portion of the first substrate 101a and has a bottom upper surface 106a. The spacer can be a photoresist spacer, and the bottom and the neck can be integrally formed. . The neck 104a2 is disposed on the bottom upper surface 106a of the part and has a neck upper surface 108a. The neck upper surface 108a is used to abut the second substrate 102a when the first substrate 101a and the second substrate 102a are assembled.

Please refer to FIG. 1B . FIG. 1B depicts a cross-sectional view of the combined state of the two substrates of the liquid crystal display panel according to FIG. 1A . When the first substrate 101a and the second substrate 102a are paired, the spacer 104 is used to provide a cell gap D between the first substrate 101a and the second substrate 102a.

In FIG. 1A, the surface 103 of the first substrate 101a facing the second substrate 102a has a normal direction 110a, and the cross-sectional area of any neck portion 104a2 perpendicular to the normal direction 110a is smaller than any one perpendicular to the normal direction 110a. The cross-sectional area of the bottom 104a1. In addition, the neck 104a2 is disposed anywhere on the bottom upper surface 106a, and in this embodiment, the neck 104a2 is disposed at the center of the bottom upper surface 106a.

When a first external force is applied to the first substrate 101a and the second substrate 102a after being combined, since the cross-sectional area of the neck 104a2 is smaller than that of the bottom 104a1, the neck 104a2 is subject to a greater pressure, which means it can be compressed more. Large, while the compression of the bottom 104a1 is small. Therefore, another part of the bottom upper surface 106a is not in contact with the second substrate 102a.

When the first substrate 101a and the second substrate 102a are combined and applied a second external force greater than the first external force, the compression amount of the neck 104a2 continues to increase until the bottom upper surface 106a touches the second substrate 102a. The compression area will be greatly increased.

When a third external force greater than the second external force is applied to the first substrate 101a and the second substrate 102a, the bottom upper surface 106a contacts the second substrate 102a. Although the spacer may still be compressed in practice, the speed and size of the compression It is much smaller than when the bottom is not in contact with the second substrate 102a. At this time, because the total compressed cross-sectional area is larger, the neck and the bottom of the spacer can be regarded as substantially not being further compressed.

second embodiment

Please refer to FIG. 2 , which depicts a cross-sectional view of two substrates of a liquid crystal display panel before assembly according to a second embodiment of the present invention. In FIG. 2 , a liquid crystal display panel 200A includes a first substrate 201 , a second substrate 202 and spacers 204 . The spacer 204 includes a bottom 204a and a neck 204b. The bottom 204a is disposed on a portion of the first substrate 201 and has a bottom upper surface 206. The spacer can be a photoresist spacer, and the bottom 204a and the neck 204b can be integrally formed. . The neck 204b is disposed on a part of the second substrate 202, and has a lower surface 208 of the neck, and all or a part of the lower surface 208 of the neck is used to resist when the first substrate 201 and the second substrate 202 are paired. part of the bottom upper surface 206 .

When the first substrate 201 and the second substrate 202 are paired, the spacer 204 is used to provide a cell gap between the first substrate 201 and the second substrate 202 .

The surface 203 of the first substrate 201 facing the second substrate 202 has a normal direction 210, and the cross-sectional area of any neck 204b perpendicular to the normal direction in contact with the bottom is smaller than that of any bottom 204a perpendicular to the normal direction 210 cross-sectional area.

When the first substrate 201 and the second substrate 202 are combined and the first external force is applied, the part of the bottom upper surface 206 of the bottom 204a that contacts the neck lower surface 208 can be compressed, and the part of the bottom upper surface 206 that is not in contact with 208 is almost inert. compressed and not in contact with the surface of the second substrate 202 .

When the first substrate 201 and the second substrate 202 are combined and applied a second external force greater than the first external force, the part of the bottom upper surface 206 of the bottom 204a that contacts the neck lower surface 208 can be compressed until the bottom upper surface 206 The remaining part touches the surface of the second substrate 202 .

When the first substrate 201 and the second substrate 202 are combined and a third external force greater than the second external force is applied, the upper surface 206 of the bottom contacts the surface 202 of the second substrate. At this time, the pressure area of the spacer 204 is greatly increased, and the bottom 204a And the neck 204b is hardly continued to be compressed. In the second embodiment, since the upper surface 206 of the bottom has a larger cross-sectional area than the lower surface 208 of the neck, the deformation of the spacer 204 is mainly provided by the neck 204b, and part of the deformation is provided by the bottom 204a. Alternatively, the bottom 204a and the neck 204b can be made of different materials. For example, the hardness of the neck 204b is greater than that of the bottom 204a, that is, the neck 204b is hardly compressed, and the main pressure or deformation is borne or provided by the bottom 204a; or the neck 204b The hardness is less than the hardness of the bottom 204a.

third embodiment

Please refer to FIG. 3 , which depicts a cross-sectional view of the state before assembly of the two substrates of the liquid crystal display panel according to the third embodiment of the present invention. The spacer 304 is disposed between the first substrate 301 and the second substrate 302 . Different from the first embodiment, in the third embodiment, in addition to the bottom portion 304a and the neck portion 304b, it further includes an appendage portion 304c disposed on the neck portion 304b. The bottom 304a, neck 304b and appendage 304c each have an upper surface 306, an upper surface 308, and an upper surface 312, and the spacer can be a photoresist spacer, and the bottom 304a, neck 304b and appendage 304c can be integrally formed. Wherein, the cross-sectional area of the neck portion 304b is smaller than the cross-sectional area of the bottom portion 304a. The cross-sectional area of the appendage 304c can be larger than the neck 304b or smaller than the neck 304b. When an external force acts on the spacer 304, the bottom 304a, the neck 304b and the appendage 304c deform respectively to resist the external force; the hardness of the bottom 304a, the neck 304b and the appendage 304c can be different, for example, the hardness of the bottom 304a is greater than that of the neck 304b and appendage 304c, or bottom 304a, are less rigid than neck 304b and appendage 304c or other combinations.

Fourth embodiment

Please refer to FIG. 4A and FIG. 4B . FIG. 4A depicts a cross-sectional view of a neck that is simultaneously in contact with the bottom and the second substrate. FIG. 4B depicts a cross-sectional view of two necks in contact with the second substrate at the same time. Different from the first embodiment and the second embodiment, in the fourth embodiment, the neck 404b in FIG. 4A is connected to the bottom 404a and the second substrate 402 at the same time. When an external force acts on the spacer 404, the deformation of the spacer 404 Mainly from the neck 404b. And extend toward the space 430 to increase the cross-sectional area. The spacer 404 shown in Figure 4B, and the spacer can be a photoresist spacer, in addition to the bottom 404a and the neck 404b, it also includes a second neck 404c, the neck 404b, the bottom 404a and the second neck 404c together form a A space 431, the space 431 becomes the space required for extension when the neck 404b and the second neck 404c are deformed to increase the cross-sectional area.

fifth embodiment

Please refer to FIG. 5 , which depicts a flowchart of a spacer forming method. The spacer 104 is formed between the first substrate 101a and the second substrate 102a. The forming method of the spacer 104 includes: first, step 501 to form the bottom 104a1 on the first substrate 101a. Finally, step 503 forms the neck 104a2 on the bottom 104a1, and the contact area between the neck 104a2 and the bottom 104a1 is smaller than the contact area between the lower surface of the bottom 104a1 and the first substrate 101a.

Sixth embodiment

Please refer to FIG. 6 , which depicts a flow chart of a liquid crystal display manufacturing method. One of the spacer forming methods includes: first, step 601 to form the bottom 204 a on the first substrate 201 . Next, step 603 forms the neck portion 204 a on the second substrate 202 . Finally, step 605 combines the first substrate 201 and the second substrate 202 , wherein the contact area between the neck 204 b and the bottom 204 a is smaller than the contact area between the bottom 204 a and the first substrate 201 .

Please refer to FIG. 7 , which depicts the stress-strain curve of the spacer. In the stress-strain graph, the vertical axis represents the stress (external force), and the horizontal axis represents the strain of the spacer. A1 represents the first external force, A2 represents the second external force and A3 represents the third external force. It can be seen from the figure that the third external force A3 is greater than the second external force A2, and the second external force A2 is greater than the first external force A1. Before the second external force A2 is applied to the spacer, the spacer deforms linearly. When the external force is equal to A2, most of the area of the spacer just contacts the opposite substrate. When the external force exceeds the second external force A2, although the amount of deformation increases, due to The cross-sectional area of the spacer that bears the external force is much larger than when the external force is less than A2, so that the deformation increase is slowed down sharply, and the entire deformation curve is nonlinear. The spacers disclosed in the second embodiment, the third embodiment and the fourth embodiment When the structure is subjected to the first external force A1, the pressure area mainly acts on the neck at this time, and part of the bottom is compressed and deformed linearly. When the external force received is less than the second external force A2, the cross-sectional area of the spacer resisting the external force does not change much, and the compression deformation tends to be linear, because the area of the bottom that does not touch the neck is much larger than the area that touches the neck, even if the external force is greater than the second external force A2 , because the bottom has been in contact with the opposite side substrate, the deformation will not increase significantly if the compression area is greatly increased. In the linear deformation, since the spacer becomes soft, it can prevent the generation of vacuum bubbles when the liquid crystal is injected at low temperature during the liquid crystal injection process of the liquid crystal display panel. At high temperature, it is easy to cause the cell gap to be uneven due to the expansion of the liquid crystal volume and produce water. ripple phenomenon occurs. In addition, after the thin film transistor substrate and the color filter substrate are assembled, when the external pressure increases, the deformation of the spacer exceeds the height of the neck, and the large-area bottom will contact the opposite substrate. The cross-sectional area under pressure will increase significantly To resist the external force to avoid the continued increase of the amount of deformation, control the amount of deformation of the spacer within a range to avoid the plastic deformation caused by the excessive strain of the spacer, resulting in uneven color caused by the variation of the gap between the panel units, so the spacer disclosed in the above embodiment It can reduce the impact on the quality of the liquid crystal display panel due to the deformation of the finished product of the liquid crystal display panel under great pressure in the past.

In summary, although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention, and those of ordinary skill in the art, without departing from the spirit and scope of the present invention, can certainly Various modifications and modifications are made, so the scope of protection of the present invention should be determined by the scope defined in the appended claims.

Claims (11)

1. display panel comprises:

One first substrate;

One second substrate; And

One sept comprises: a bottom is arranged on described first substrate of part; And

One neck is arranged at the upper surface of described bottom, and the lower surface of wherein said neck and the contact area of described bottom are less than the contact area of the lower surface and described first substrate of described bottom;

The hardness of wherein said bottom and described neck is inequality.

2. display panel as claimed in claim 1, the contact area of wherein said neck and described second substrate is less than the contact area of described neck and described bottom.

3. display panel as claimed in claim 1 comprises also that wherein an attaching part is arranged between described neck and described second substrate.

4. display panel as claimed in claim 3, the hardness of wherein said bottom, described neck and described attaching part is incomplete same.

5. display panel as claimed in claim 1, the hardness of wherein said neck is greater than the hardness of described bottom.

6. display panel as claimed in claim 1, the hardness of wherein said neck is less than the hardness of described bottom.

7. display panel as claimed in claim 1, the lower surface towards described second substrate of wherein said first substrate has a normal direction, and the sectional area of arbitrary described neck perpendicular to described normal direction is less than the sectional area of arbitrary described bottom perpendicular to described normal direction.

8. display panel as claimed in claim 1, wherein said first substrate and described second substrate are respectively a thin film transistor base plate and a colored filter substrate.

9. display panel as claimed in claim 1, wherein said first substrate and described second substrate are respectively a colored filter substrate and a thin film transistor base plate.

10. display panel as claimed in claim 1, wherein said sept are a photoresistance sept.

11. display panel as claimed in claim 1, the distortion of wherein said sept are mainly provided by this neck and part is provided by this bottom.

Images