WO2020168658A1

WO2020168658A1 - Liquid crystal display panel and manufacturing method therefor

Info

Publication number: WO2020168658A1
Application number: PCT/CN2019/091760
Authority: WO
Inventors: 田新斌; 徐向阳
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2019-02-18
Filing date: 2019-06-18
Publication date: 2020-08-27
Also published as: CN109633974A

Abstract

A liquid crystal display panel and a manufacturing method therefor. The liquid crystal display panel comprises a first substrate (10) and a second substrate (20) arranged opposite to each other, and a conductive post (30) provided between the first substrate (10) and the second substrate (20). The first substrate (10) comprises a first base (11) and a shading electrode (12) provided on the first base (11). The second substrate (20) comprises a second base (21) and a common electrode layer (22) provided on the second base (21). The shading electrode (12) of the first substrate (10) is opposite to the common electrode layer (22) of the second substrate (20). Both ends of the conductive post (30) respectively contact the shading electrode (12) and the common electrode layer (22), so that the potential of the shading electrode (12) and the potential of the common electrode layer (22) can always be maintained the same, thereby ensuring the shading effect of liquid crystal molecules corresponding to the shading electrode (12), and improving the display quality.

Description

Liquid crystal display panel and manufacturing method thereof

Technical field

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

Background technique

Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen, etc.

Generally, a liquid crystal display device includes a liquid crystal panel and a back light module arranged on the back of the liquid crystal panel. Among them, the structure of the liquid crystal panel is mainly composed of a thin film transistor array (Thin Film Transistor Array, TFT Array) substrate, a color filter (Color Filter, CF) substrate that is a color film substrate, and a liquid crystal layer ( Liquid Crystal Layer), its working principle is to control the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage on two glass substrates, and refract the light from the backlight module to produce a picture. Among them, a thin film transistor array is prepared on the array substrate to drive the rotation of the liquid crystal to control the display of each pixel, and a red, green and blue (RGB) color filter layer is prepared on the color film substrate to form the color of each pixel . In addition, the CF substrate also has a black matrix layer (Black Matrix, BM) and columnar spacers (Photo Spacer, PS) layer, in which BM plays a role of shading, thereby improving the contrast of the liquid crystal display panel to achieve a better display effect, and PS is used to support the upper and lower substrates to maintain the cell thickness.

In order to improve the contrast of the LCD panel, DBS (Data Line BM Less Structure) pixel design is also being used more and more. It covers ITO (ie indium tin oxide) traces above the data line in the TFT array substrate as a shading electrode. The potential of the shading electrode and the color film The potential of the common electrode layer of the substrate is the same, that is, the potential difference between the light-shielding electrode and the common electrode layer is 0, and the liquid crystal molecules sandwiched between the light-shielding electrode and the common electrode layer are always in a dark state without being deflected, which has a light-shielding effect. However, in actual use, due to the capacitance generated by the data line and other factors, the voltage difference between the light shielding electrode and the common electrode layer may not be zero at certain moments. At this time, the liquid crystal between the light shielding electrode and the common electrode layer It is deflected without blocking the light, and at the same time, the display screen often has problems such as H-crosstalk. In view of the above-mentioned problems, the technical solution of the prior art needs to provide a feedback compensation function in an external chip to perform feedback compensation for the changed voltage, but it will increase the product cost.

technical problem

The purpose of the present invention is to provide a liquid crystal display panel that can keep the potentials of the light-shielding electrode and the common electrode layer always the same, ensure the light-shielding effect of the liquid crystal molecules corresponding to the light-shielding electrode, and improve the display quality.

Another object of the present invention is to provide a method for manufacturing a liquid crystal display panel, the prepared liquid crystal display panel can keep the light shielding electrode and the common electrode layer always the same potential, ensure the light shielding effect of the liquid crystal molecules corresponding to the light shielding electrode, and improve the display quality.

Technical solutions

In order to achieve the above objective, the present invention first provides a liquid crystal display panel, which includes a first substrate and a second substrate disposed oppositely, and a conductive post disposed between the first substrate and the second substrate;

The first substrate includes a first substrate and a light shielding electrode provided on the first substrate; the second substrate includes a second substrate and a common electrode layer provided on the second substrate; the light shielding of the first substrate The electrode is opposite to the common electrode layer of the second substrate, and both ends of the conductive pillar are in contact with the light shielding electrode and the common electrode layer, respectively.

The liquid crystal display panel further includes a liquid crystal layer disposed between the first substrate and the second substrate.

The first substrate further includes a TFT array layer and a color filter layer sequentially arranged on the first substrate; the light shielding electrode is arranged on the color filter layer.

The color filter layer includes a plurality of color resist blocks arranged at intervals;

The second substrate further includes a black matrix arranged on the second substrate, the common electrode layer is arranged on the second substrate and the black matrix, and the black matrix shields the junction of adjacent color resist blocks.

The materials of the light shielding electrode and the common electrode layer are both ITO.

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

Step S1, providing a first substrate and a second substrate;

The first substrate includes a first substrate and a light-shielding electrode provided on the first substrate; the second substrate includes a second substrate and a common electrode layer provided on the second substrate;

Step S2, fabricating conductive pillars on the light-shielding electrode of the first substrate or on the common electrode layer of the second substrate;

Step S3, the first substrate and the second substrate are paired so that the light-shielding electrode of the first substrate is opposite to the common electrode layer of the second substrate, and the two ends of the conductive column are respectively in contact with the light-shielding electrode and the common electrode layer.

The manufacturing method of the liquid crystal display panel further includes step S4, injecting a liquid crystal material between the first substrate and the second substrate to form a liquid crystal layer.

The second substrate further includes a black matrix arranged on the second substrate, and the common electrode layer is arranged on the second substrate and the black matrix;

After the step S3 is completed, the black matrix blocks the junction of adjacent color blocking blocks.

Beneficial effect

The beneficial effects of the present invention: the liquid crystal display panel of the present invention includes a first substrate and a second substrate disposed opposite to each other, and a conductive post disposed between the first substrate and the second substrate. The first substrate includes a first substrate and The light-shielding electrode on the first substrate, the second substrate includes a second substrate and a common electrode layer provided on the second substrate, the light-shielding electrode of the first substrate is opposite to the common electrode layer of the second substrate, and the two conductive pillars The terminals are respectively in contact with the light-shielding electrode and the common electrode layer, so that the potentials of the light-shielding electrode and the common electrode layer are always the same, ensuring the light-shielding effect of the liquid crystal molecules corresponding to the light-shielding electrode, and improving the display quality. The liquid crystal display panel manufactured by the method of manufacturing the liquid crystal display panel of the present invention can keep the light shielding electrode and the common electrode layer always the same potential, ensure the light shielding effect of the liquid crystal molecules corresponding to the light shielding electrode, and improve the display quality.

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,

FIG. 1 is a schematic diagram of the structure of the liquid crystal display panel of the present invention;

2 is a flow chart of the manufacturing method of the liquid crystal display panel of the present invention;

3 is a schematic diagram of step S1 of the manufacturing method of the liquid crystal display panel of the present invention;

4 is a schematic diagram of step S2 of a preferred embodiment of the method for manufacturing a liquid crystal display panel of the present invention;

5 is a schematic diagram of step S3 of the manufacturing method of the liquid crystal display 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.

Referring to FIG. 1, the present invention provides a liquid crystal display panel, which includes a first substrate 10 and a second substrate 20 disposed opposite to each other, a conductive pillar 30 disposed between the first substrate 10 and the second substrate 20, and a first substrate The liquid crystal layer 40 between the substrate 10 and the second substrate 20.

The first substrate 10 includes a first substrate 11 and a light-shielding electrode 12 provided on the first substrate 11. The second substrate 20 includes a second substrate 21 and a common electrode layer 22 provided on the second substrate 21. The light-shielding electrode 12 of the first substrate 10 is opposed to the common electrode layer 22 of the second substrate 20, and both ends of the conductive pillar 30 are in contact with the light-shielding electrode 12 and the common electrode layer 22, respectively, so that the light-shielding electrode 12 and the common electrode layer 22 are connected. Electrical connection.

Specifically, the first substrate 10 further includes a TFT array layer 13 and a color filter layer 14 sequentially disposed on the first substrate 11. The light shielding electrode 12 is disposed on the color filter layer 14, that is, the first The substrate 10 is a TFT array substrate designed using COA (integration of a color filter layer on a TFT array substrate).

Further, the color filter layer 14 includes a plurality of color resist blocks 141 arranged in sequence, such as a red color resist block, a green color resist block, and a blue color resist block. The second substrate 20 also includes a black matrix 23 disposed on the second substrate 21, the common electrode layer 22 is disposed on the second substrate 21 and the black matrix 23, and the black matrix 23 shields adjacent color resistors. The junction of block 141.

Specifically, the materials of the first substrate 11 and the second substrate 21 are both transparent materials, such as glass.

Specifically, the materials of the light shielding electrode 12 and the common electrode layer 22 are both ITO.

Specifically, the conductive pillar 30 may be directly fabricated on the light-shielding electrode 12 of the first substrate 10 before the first substrate 10 and the second substrate 20 are paired, or the first substrate 10 and the second substrate 20 may be paired. It is directly fabricated on the common electrode layer 22 of the second substrate 20 before the assembly, preferably directly on the light-shielding electrode 12 of the first substrate 10.

It should be noted that, in the liquid crystal display panel of the present invention, a conductive pillar 30 is provided between the first substrate 10 and the second substrate 20, and the conductive pillar 30 can be used as a spacer for the first substrate 10 and the second substrate 20. Support to maintain the cell thickness of the liquid crystal layer 40, and the two ends of the conductive pillar 30 are in contact with the light-shielding electrode 12 and the common electrode layer 22 respectively, thereby electrically connecting the light-shielding electrode 12 and the common electrode layer 22, so that The voltages of the light-shielding electrode 12 and the common electrode layer 22 are equal at any time, that is, the voltage difference between the light-shielding electrode 12 and the common electrode layer 22 is 0 at any time, so that the liquid crystal molecules corresponding to the light-shielding electrode 12 in the liquid crystal layer 40 are also That is, the liquid crystal molecules located between the light-shielding electrode 12 and the common electrode layer 22 remain undeflected and are in a dark field environment, which has a better light-shielding effect, and avoids the light-shielding electrode 12 and the common electrode due to the capacitance generated by the data line and other factors. The light leakage and lateral crosstalk caused by the potential difference of the layer 22 is not zero, which effectively improves the display quality.

Please refer to FIG. 2. Based on the same inventive concept, the present invention also provides a method for manufacturing a liquid crystal display panel, which includes the following steps:

Step S1, please refer to FIG. 3 to provide a first substrate 10 and a second substrate 20.

The first substrate 10 includes a first substrate 11 and a light-shielding electrode 12 provided on the first substrate 11. The second substrate 20 includes a second substrate 21 and a common electrode layer 22 provided on the second substrate 21.

Specifically, the first substrate 10 further includes a TFT array layer 13 and a color filter layer 14 which are sequentially arranged on the first substrate 11, that is, the first substrate 10 adopts COA (the color filter layer is integrated in the TFT). Array substrate) designed TFT array substrate.

The light shielding electrode 12 is arranged on the color filter layer 14.

Further, the color filter layer 14 includes a plurality of color resist blocks 141 arranged in sequence, such as a red color resist block, a green color resist block, and a blue color resist block.

Specifically, the second substrate 20 further includes a black matrix 23 provided on the second substrate 21, and the common electrode layer 22 is provided on the second substrate 21 and the black matrix 23.

Step S2, fabricating conductive pillars 30 on the light-shielding electrode 12 of the first substrate 10 or on the common electrode layer 22 of the second substrate 20.

Preferably, in the embodiment shown in FIG. 4, the conductive pillar 30 is formed on the light-shielding electrode 12 of the first substrate 10.

Step S3, referring to FIG. 5, the first substrate 10 and the second substrate 20 are paired so that the light-shielding electrode 12 of the first substrate 10 is opposite to the common electrode layer 22 of the second substrate 20, and the two ends of the conductive pillar 30 are respectively It is in contact with the light shielding electrode 12 and the common electrode layer 22.

Specifically, after the step S3 is completed, the black matrix 23 shields the junction of adjacent color resist blocks 141.

Step S4, referring to FIG. 1, a liquid crystal material is injected between the first substrate 10 and the second substrate 20 to form a liquid crystal layer 40.

It should be noted that in the method for manufacturing a liquid crystal display panel of the present invention, conductive pillars 30 are fabricated on the light-shielding electrode 12 of the first substrate 10 or on the common electrode layer 22 of the second substrate 20, and the first substrate 10 and After the second substrate 20 is paired, the conductive pillar 30 can support the first substrate 10 and the second substrate 20, thereby maintaining the cell thickness of the liquid crystal layer 40, and both ends of the conductive pillar 30 are connected to the light-shielding electrode 12 and The common electrode layer 22 contacts, thereby electrically connecting the light-shielding electrode 12 and the common electrode layer 22, so that the voltage of the light-shielding electrode 12 and the common electrode layer 22 are equal at any time, that is, the light-shielding electrode 12 and the common electrode layer 22 are equal at any time. The voltage difference between them is 0, so that the liquid crystal molecules corresponding to the light-shielding electrode 12 in the liquid crystal layer 40, that is, the liquid crystal molecules between the light-shielding electrode 12 and the common electrode layer 22, remain undeflected and are in a dark field environment. The better light shielding effect avoids light leakage and lateral crosstalk caused by the potential difference between the light shielding electrode 12 and the common electrode layer 22 being non-zero due to the capacitance generated by the data line and other factors, and effectively improves the display quality.

To sum up, the liquid crystal display panel of the present invention includes a first substrate and a second substrate that are opposed to each other, and a conductive pillar provided between the first substrate and the second substrate. The first substrate includes a first substrate and a second substrate. A light-shielding electrode on a substrate. The second substrate includes a second substrate and a common electrode layer provided on the second substrate. The light-shielding electrode of the first substrate is opposite to the common electrode layer of the second substrate. They are respectively in contact with the light-shielding electrode and the common electrode layer, so as to keep the potential of the light-shielding electrode and the common electrode layer always the same, ensure the light-shielding effect of the liquid crystal molecules corresponding to the light-shielding electrode, and improve the display quality. The liquid crystal display panel manufactured by the method of manufacturing the liquid crystal display panel of the present invention can keep the light shielding electrode and the common electrode layer always the same potential, ensure the light shielding effect of the liquid crystal molecules corresponding to the light shielding electrode, and improve the display quality.

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

A liquid crystal display panel, comprising a first substrate and a second substrate arranged oppositely, and a conductive column arranged between the first substrate and the second substrate;

The first substrate includes a first substrate and a light shielding electrode provided on the first substrate; the second substrate includes a second substrate and a common electrode layer provided on the second substrate; the light shielding of the first substrate The electrode is opposite to the common electrode layer of the second substrate, and both ends of the conductive pillar are in contact with the light shielding electrode and the common electrode layer, respectively.
8. The liquid crystal display panel of claim 1, further comprising a liquid crystal layer disposed between the first substrate and the second substrate.
8. The liquid crystal display panel of claim 1, wherein the first substrate further comprises a TFT array layer and a color filter layer sequentially disposed on the first substrate; the light shielding electrode is disposed on the color filter layer.
3. The liquid crystal display panel of claim 3, wherein the color filter layer comprises a plurality of color resist blocks arranged in sequence;

The second substrate further includes a black matrix arranged on the second substrate, the common electrode layer is arranged on the second substrate and the black matrix, and the black matrix shields the junction of adjacent color resist blocks.
8. The liquid crystal display panel of claim 1, wherein the light shielding electrode and the common electrode layer are made of ITO.
A method for manufacturing a liquid crystal display panel includes the following steps:

Step S1, providing a first substrate and a second substrate;

The first substrate includes a first substrate and a light-shielding electrode provided on the first substrate; the second substrate includes a second substrate and a common electrode layer provided on the second substrate;

Step S2, fabricating conductive pillars on the light-shielding electrode of the first substrate or on the common electrode layer of the second substrate;

Step S3, the first substrate and the second substrate are paired so that the light-shielding electrode of the first substrate is opposite to the common electrode layer of the second substrate, and the two ends of the conductive column are respectively in contact with the light-shielding electrode and the common electrode layer.
7. The method for manufacturing a liquid crystal display panel according to claim 6, further comprising step S4, injecting liquid crystal material between the first substrate and the second substrate to form a liquid crystal layer.
7. The method for manufacturing a liquid crystal display panel according to claim 6, wherein the first substrate further comprises a TFT array layer and a color filter layer which are sequentially disposed on the first substrate; and the light shielding electrode is disposed on the color filter layer. Layer up.
8. The method of manufacturing a liquid crystal display panel according to claim 8, wherein the color filter layer comprises a plurality of color resist blocks arranged in sequence;

The second substrate further includes a black matrix arranged on the second substrate, and the common electrode layer is arranged on the second substrate and the black matrix;

After the step S3 is completed, the black matrix blocks the junction of adjacent color blocking blocks.
7. The method for manufacturing a liquid crystal display panel according to claim 6, wherein the materials of the light shielding electrode and the common electrode layer are both ITO.