CN1683963A - Liquid crystal display panel and its producing method - Google Patents

Abstract

The LCD panel includes two, the first and the second, oppositely set substrates and one liquid crystal layer set between the first substrate and the second substrate. The second substrate includes one display area and one peripheral area, one colloid frame set in the surface area of the first substrate and the second substrate corresponding to the peripheral area, one isolating body of elastic material set in the surface area of the first substrate and the second substrate corresponding to area between the colloid frame and the display area. The present invention also discloses the making process of the LCD panel.

Description

Liquid crystal display panel and manufacturing method thereof

【Technical field】

The invention relates to a liquid crystal display panel and a manufacturing method thereof.

【Background technique】

Due to the characteristics of low radiation, light and thin size, and low power consumption, liquid crystal display devices are widely used, ranging from small-sized mobile phones to large-sized LCD TVs.

The liquid crystal display panel is the main part of the liquid crystal display device. It mainly includes a first substrate and a second substrate, a liquid crystal layer including liquid crystal molecules is sandwiched therein, and the first substrate and the second substrate are bonded by a frame glue. The injection of liquid crystal molecules can generally be divided into two types: a vacuum suction method and a one-drop-fill (ODF) method. The vacuum suction type sucks the liquid crystal by the capillary principle after the first substrate and the second substrate are assembled. This liquid crystal injection method is very time-consuming and wastes liquid crystal material, and is generally applied to small-sized liquid crystal panels. The drop method is to drop the liquid crystal directly on the substrate first, and then carry out the assembly of the substrate. This method can greatly save the time and liquid crystal material for injecting the liquid crystal, and has great advantages especially on large-size panels.

Please refer to FIG. 1 and FIG. 2 , which are plan views and cross-sectional views of a prior art liquid crystal display panel. The liquid crystal display panel 1 includes two opposite first substrates 100 , a second substrate 150 and liquid crystal molecules 103 disposed between the first substrate 100 and the second substrate 150 . An alignment film 101 is disposed on a side of the first substrate 100 adjacent to the liquid crystal molecules 103 , and an alignment film 151 is disposed on a side of the second substrate 150 adjacent to the liquid crystal molecules 103 . The second substrate 150 includes a display area 1502 , a peripheral area 1501 , a frame glue 110 and a black matrix area 130 . The frame glue 110 is a continuous ring structure, which is disposed on the peripheral area 1501 , and is used for adhering the first substrate 100 and the second substrate 150 and isolating the liquid crystal molecules 103 from the outside. The black matrix region 130 is disposed on the display region 1502 and the peripheral region 1501 to prevent light leakage at the periphery of the display region 1502 and between sub-pixels (not shown in the figure) of the display region 1502 .

The liquid crystal display panel 1 adopts the ODF manufacturing process, which mainly includes the following steps: forming a first substrate 100 and a second substrate 150; forming a frame glue 110 and a black matrix area 110 on the surface of the second substrate 150; Drop liquid crystal droplets on the surface of the display area 1502 of the second substrate 100, and the liquid crystal droplets are droplets of a mixture composed of liquid crystal molecules 103 and spacers; The two substrates 150 are laminated; on the side of the second substrate 150, the frame colloid 110 is irradiated with ultraviolet light (Ultra Violet, UV) to fully harden it to make the liquid crystal display panel 1 .

However, there is no isolation between the display area 1502 of the liquid crystal display panel 1 and the frame rubber 110. During the manufacturing process of the liquid crystal display panel 1, the liquid crystal molecules 103 in the display area 1502 are easy to chemically react with the frame rubber 110 before the frame rubber 110 is completely hardened. The liquid crystal molecules 103 are polluted to reduce their optical performance, thereby affecting the display quality of the liquid crystal display panel 1 .

【Content of invention】

In order to overcome the problem in the prior art that the liquid crystal molecules of the liquid crystal display panel react with the incompletely hardened frame colloid to affect the display quality of the liquid crystal display panel, the present invention provides a liquid crystal display panel with good display quality.

In order to overcome the problem in the prior art that the liquid crystal molecules of the liquid crystal display panel react with the incompletely hardened frame colloid to affect the display quality of the liquid crystal display panel, the present invention provides a method for manufacturing a liquid crystal display panel with good display quality.

The technical solution adopted by the present invention to solve the technical problem is to provide a liquid crystal display panel, comprising two oppositely arranged first substrates and second substrates, and a liquid crystal layer arranged between the first substrates and the second substrates. The second substrate includes a display area and a peripheral area, a frame glue is arranged on the first substrate and the area of the second substrate surface corresponding to the peripheral region, and an insulator is arranged on the first substrate and the second substrate surface corresponding to the frame glue and the area between the display area, where the insulator is made of elastic material.

The technical solution adopted by the present invention to solve the technical problem is to provide a method for manufacturing a liquid crystal display panel, comprising the following steps: providing a first substrate and a second substrate, wherein the second substrate has a display area and a peripheral area; A spacer is formed in the peripheral area of the second substrate, and the spacer is made of elastic material; a frame colloid is formed in the peripheral area of the spacer; liquid crystal material is dropped into the surface of the first substrate; the first substrate Align with the second substrate, and stack the first substrate and the second substrate under vacuum condition; irradiate the frame glue with ultraviolet light on the side of the second substrate to harden the frame glue.

Compared with the prior art, since the liquid crystal display panel of the present invention has an insulator, the insulator has a ring structure and is arranged between the liquid crystal molecules and the frame colloid. With the insulator, during the manufacturing process of the liquid crystal display panel, the frame colloid can be completely isolated from the liquid crystal molecules, preventing the liquid crystal molecules from chemically reacting with the incompletely cured frame colloid, thereby contaminating the liquid crystal molecules, and further affecting the liquid crystal display panel. display quality. Therefore, the liquid crystal display panel of the present invention has good display quality.

【Description of drawings】

FIG. 1 is a schematic plan view of a prior art liquid crystal display panel.

FIG. 2 is a cross-sectional view along II-II direction of the prior art liquid crystal display panel shown in FIG. 1 .

FIG. 3 is a schematic plan view of the first embodiment of the liquid crystal display panel of the present invention.

4 to 6 are the manufacturing flowcharts of the first embodiment of the liquid crystal display panel of the present invention.

7 is a schematic plan view of the second embodiment of the liquid crystal display panel of the present invention.

8 to 10 are the manufacturing flowcharts of the second embodiment of the liquid crystal display panel of the present invention.

FIG. 11 is a schematic plan view of a third embodiment of a liquid crystal display panel of the present invention.

【Detailed ways】

Please refer to FIG. 3 and FIG. 6 , which are a schematic plan view and a cross-sectional view along VI-VI direction of the liquid crystal display panel of the present invention. The liquid crystal display panel 3 of the present invention includes a first substrate 300 , a second substrate 350 and a liquid crystal layer (not shown) sandwiched between the first substrate 300 and the second substrate 350 . The liquid crystal layer includes liquid crystal molecules 303 .

An alignment film 301 is disposed on a side of the first substrate 300 adjacent to the liquid crystal layer, and an alignment film 351 is disposed on a side of the second substrate 350 adjacent to the liquid crystal layer. The second substrate 350 includes a display area 3502 and a peripheral area 3501 located around the display area 3502 . A frame glue 310 is formed on the surface of the alignment film 351 corresponding to the peripheral region 3501. The frame glue 310 is a continuous ring structure. The frame glue 310 is a light-curing (Light Hardening) frame glue, which can Hardened under irradiation for supporting and fixing the first substrate 300 and the second substrate 350 .

An insulator 360 is formed on the alignment film 351 along the outer edge of the display area 3502 of the second substrate 350, for isolating the liquid crystal molecules 303 in the display area 3502 from the frame glue 310, so as to prevent the frame glue 310 from contacting with the frame glue 310 when it is not completely hardened. The liquid crystal molecules 303 undergo chemical reactions to affect the optical properties of the liquid crystal molecules 303 . The insulator 360 is a continuously distributed annular structure, and the insulator 360 is made of an elastic material, which can prevent the height change of the insulator 360 due to process factors during the manufacturing process of the liquid crystal display panel 3, thereby causing the first substrate 300 After being paired with the second substrate 350 , the internal spacing is not uniform. The section of the insulating body 360 is rectangular, and its material is acrylic resin (PolymethylMethacrylate, PMMA). The insulator 360 is separated from the frame glue 310 by a certain gap.

A black matrix 330 is formed on the peripheral area 3501 and the display area 3502 of the second substrate 350 to prevent light leakage at the edge of the display area 3502 and between sub-pixels (not shown). The black matrix 330 covers the insulator 360 and has a gap (not marked) with the frame glue 310. The black matrix 330 is made of opaque metal chromium (Cr), so the light is not affected by the black matrix 330. irradiates through the second substrate 350 to the frame glue 310 and hardens the frame glue 310 .

4 to 6 are schematic diagrams of the manufacturing process of the liquid crystal display panel 3 of the present invention.

Referring to FIG. 4 , a first substrate 300 and a second substrate 350 are provided. A black matrix 330 is formed on the peripheral area 3501 and the display area 3502 of the second substrate 350 , and an alignment film 351 is formed on the surface of the second substrate 350 and covers the black matrix 330 . An alignment film 301 is formed on the first substrate 300 , and a plurality of spherical spacers (not shown) made of glass or plastic are distributed on the alignment film 301 .

Referring to FIG. 5 , a liquid crystal dispenser (Dispenser) is used to drop liquid crystals on the alignment film 301 , and the amount of liquid crystals dropped depends on the size of the liquid crystal panel. A frame colloid 310 is formed on the surface of the alignment film 351 corresponding to the peripheral region 3501 of the second substrate 350, there is a gap between the frame colloid 310 and the black matrix 330, so light can pass through the second substrate 350 to irradiate on the The frame glue 310 is placed on and the frame glue 310 is hardened. An insulator 360 is formed on the alignment film 351 , and the insulator 360 is disposed between the frame colloid 310 and the display area 3502 to isolate the frame colloid 310 from the liquid crystal molecules 303 .

Referring to FIG. 6 , the second substrate 350 is turned over so that the side of the second substrate 350 with the alignment film 351 faces downward. Align the first substrate 300 with the second substrate 350, stack the first substrate 300 and the second substrate 350 in a vacuum chamber (not shown), and then remove the first substrate 300 and the second substrate 350 from the vacuum The first substrate 300 and the second substrate 350 can be initially bonded because the air pressure inside the first substrate 300 and the second substrate 350 is lower than the outside air pressure. A photomask (not shown in the figure) is provided, and the frame colloid 310 is irradiated with ultraviolet light to harden, so that the first substrate 300 and the second substrate 350 are further combined to form a liquid crystal display panel 3 .

During the manufacturing process of the liquid crystal display panel 3 of the present invention, a plurality of columnar spacers may also be formed on the first substrate 300 , and the alignment film 301 covers the columnar spacers and the first substrate 300 .

Please refer to FIG. 7 and FIG. 10 , which are schematic plan views and cross-sectional views along the X-X direction of the second embodiment of the liquid crystal display panel of the present invention. The liquid crystal display panel 4 is substantially the same as the liquid crystal display panel 3 of the first embodiment of the present invention, including a first substrate 400 and a second substrate 450, the second substrate 450 includes a display area 4502 and a peripheral area 4501, a The frame glue 410 and an insulator 460 are formed on the peripheral area 4501 and separated by a certain gap. A black matrix 430 is formed on the display area 4502 and the peripheral area 4501 , and a photo spacer 470 is formed on the peripheral area 4501 and separated from the outer edge of the black matrix 430 with a certain gap. The photo spacers 470 make the thickness of the liquid crystal display panel 4 uniform.

Please refer to FIG. 8 to FIG. 10 , which are schematic diagrams of the manufacturing method of the liquid crystal display panel 4 of the present invention.

Referring to FIG. 8 , a first substrate 400 and a second substrate 450 are provided. A black matrix 430 is formed on the display area 4502 of the second substrate 450 , and an alignment film 451 is formed on the surface of the second substrate 450 and covers the black matrix 430 . An alignment film 401 is formed on the first substrate 400 .

Referring to FIG. 9 , a liquid crystal dropper is used to drop liquid crystals on the alignment film 401 , and the amount of liquid crystals dropped depends on the size of the liquid crystal panel. A frame glue 410 is formed on the surface of the alignment film 451 corresponding to the peripheral area 4501 of the second substrate 450 . An insulator 460 is formed on the alignment film 451 , and the insulator 460 is disposed between the frame colloid 410 and the display area 4502 to isolate the frame colloid 410 from the liquid crystal molecules 403 . A photo spacer 470 is formed on the outer edge of the black matrix 430 , and the photo spacer 470 and the isolator 460 can be manufactured by the same semiconductor process without adding additional process.

Referring to FIG. 10 , the first substrate 400 and the second substrate 450 are aligned and laminated, and the frame colloid 410 is irradiated with ultraviolet light to harden, and a liquid crystal display panel 4 is manufactured.

Please refer to FIG. 11 , which is a schematic plan view of a third embodiment of a liquid crystal display panel of the present invention. The liquid crystal display panel 5 includes a first substrate 500 , a second substrate 550 and a liquid crystal layer (not shown) disposed between the first substrate 500 and the second substrate 550 . The second substrate includes a display area 5502 and a peripheral area 5501 . A frame glue 510 is disposed on the peripheral area 5501 of the second substrate 550 , the frame glue 510 is a ring structure with an opening 570 , and the frame glue 510 is heat-cured frame glue. An insulator 560 is disposed between the plastic frame 510 and the display area 5502 . The insulator 560 is a ring structure with an opening 580 corresponding to the opening 570 of the plastic frame 510 . The insulator 560 is separated from the frame glue 510 by a certain gap. A black matrix 530 is disposed on the display area 5502 and the peripheral area 5501 of the second substrate 550 , covering the frame glue 510 and the insulating body 560 .

The manufacturing method of the liquid crystal display panel 5 is mainly different from the manufacturing method of the liquid crystal display panel 3 in that the time of liquid crystal injection is different. First align and stack the first substrate 500 and the second substrate 550 and heat and pressurize the frame glue 510 to harden, then inject the liquid crystal from the openings 570 and 580 of the frame glue 510 and the insulator 560 into the first substrate 500 and the second substrate 550 to form a cavity (not shown), and then seal the openings 570 and 580 to form a liquid crystal display panel 5 .

The insulator material of the present invention can also be an elastic plastic material, such as natural rubber (Natural Rubber, NR), styrene-butadiene rubber (Styrene Butadiene Rubber, SBR), neoprene rubber (Isobutylene-Isoprene Rubber, IIR), propylene-butadiene Nitrile-Butadiene Rubber (NBR) and Ethylene-Propylene-Diene Monomer (EPDM). The section of the insulator can also be trapezoidal. The insulator and the colloidal frame can also be in contact with each other without a gap between them. The frame colloid, the insulating body and the light spacer can also be formed on the first substrate. The black matrix of the present invention may also be chromium oxide (CrOx). In the manufacturing method of the liquid crystal display panel of the present invention, the liquid crystal can also be dropped on the second substrate, and then the first substrate is reversed and aligned with the second substrate to form a liquid crystal display panel.

Claims (14)

1. a display panels, comprise that two first substrates that are provided with relatively and second substrate, are arranged on the liquid crystal layer between first substrate and second substrate, this second substrate comprises a viewing area and an external zones, one frame colloid is arranged on first substrate and second substrate surface to zone that should external zones, it is characterized in that: an insulation be arranged on first substrate and second substrate surface to should the frame colloid and the viewing area between the zone, wherein this insulation is to be made by resilient material.

2. display panels as claimed in claim 1 is characterized in that: this resilient material is an acryl resin.

3. display panels as claimed in claim 1 is characterized in that: this resilient material is an elastic caoutchouc.

4. display panels as claimed in claim 1 is characterized in that: this insulation and this frame colloid are the ring-shaped continuous structures.

5. display panels as claimed in claim 1 is characterized in that: this insulation and this frame colloid are the ring texturees with an opening.

6. display panels as claimed in claim 1 is characterized in that: have a gap between this frame colloid and this insulation.

7. display panels as claimed in claim 1 is characterized in that: this frame colloid links to each other with this insulation.

8. display panels as claimed in claim 1 is characterized in that: comprise that further one is formed on the black matrix on second substrate.

9. display panels as claimed in claim 8 is characterized in that: this black matrix covers this insulation.

10. display panels as claimed in claim 8 is characterized in that: this black matrix and this frame colloid separate with certain clearance.

11. display panels as claimed in claim 8 is characterized in that: this black matrix covers this insulation and frame colloid.

12. the manufacture method of a display panels may further comprise the steps: one first substrate and second substrate are provided, and wherein this second substrate has a viewing area and an external zones; External zones at this second substrate forms an insulation, and this insulation is to be made by resilient material; Form a frame colloid in the periphery of this insulation; Splash into liquid crystal material at this first substrate surface; With first substrate and second base plate alignment, and under vacuum condition with first substrate and second superimposed substrate; In second substrate, one side with UV-irradiation frame colloid so that frame glue sclerosis.

13. the manufacture method of a display panels may further comprise the steps: one first substrate and second substrate are provided, and wherein this second substrate has a viewing area and an external zones; External zones at this second substrate forms an insulation, and this insulation is to be made by resilient material, has an opening; Form a frame colloid in the periphery of this insulation, this frame colloid have one with the opening corresponding opening of this insulation; With first substrate and second base plate alignment and superimposed, formation one has the chamber of above-mentioned opening; Heating and pressurizing makes the sclerosis of frame colloid; In the chamber of first substrate and the formation of second substrate, inject liquid crystal.

14. the manufacture method of display panels as claimed in claim 13 is characterized in that: further comprise a sealing processing procedure, with the opening sealing of this insulation and this frame colloid.

Images