CN112748594A - Display mother board, preparation method thereof and preparation method of display panel - Google Patents
Display mother board, preparation method thereof and preparation method of display panel Download PDFInfo
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- CN112748594A CN112748594A CN201911046090.7A CN201911046090A CN112748594A CN 112748594 A CN112748594 A CN 112748594A CN 201911046090 A CN201911046090 A CN 201911046090A CN 112748594 A CN112748594 A CN 112748594A
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- substrate
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- liquid crystal
- mother board
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
Abstract
The invention provides a display mother board, a preparation method thereof and a preparation method of a display panel. The display mother board comprises a plurality of sub display panels arranged at intervals, each sub display panel comprises a display liquid crystal box and a third substrate arranged on the light inlet side of the display liquid crystal box, liquid crystal is filled in a gap formed by the combination of the third substrate and the display liquid crystal box, each display liquid crystal box comprises a second substrate and a first substrate which are combined with each other, the second substrates are located between the first substrates and the third substrates, the first substrates, the second substrates and the third substrates all extend to a spacing area between the sub display panels, in the spacing area, a notch penetrating through the thickness of the second substrates is formed in the second substrates, and the orthographic projection of cutting lines for cutting the sub display panels on the second substrates falls into the orthographic projection range of the notch on the second substrates. The display mother board can be normally split after cutting by arranging the notch in the second substrate, so that smooth cutting and splitting of the display mother board formed by the three layers of substrates are realized.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display mother board, a preparation method of the display mother board and a preparation method of a display panel.
Background
At present, in order to improve the display contrast of a liquid crystal display panel, a display panel having a dual liquid crystal cell structure in which a light control liquid crystal cell and a display liquid crystal cell are combined is generally used, and generally, only one substrate is provided for the light control liquid crystal cell, and the substrate and the display liquid crystal cell are combined to form the light control liquid crystal cell. The liquid crystal display panel is formed by cutting a display mother board comprising a plurality of sub display panels during manufacturing.
Because the display mother board is composed of three glass substrates with a laminated structure, the cutter wheel can only cut the upper glass substrate and the lower glass substrate during cutting, cracks generated by cutting can only penetrate and extend in the upper glass substrate and the lower glass substrate, and cracks cannot be generated on the middle glass substrate, so that the whole display mother board cannot crack during splitting after cutting.
Disclosure of Invention
The invention provides a display mother board, a preparation method thereof and a preparation method of a display panel, aiming at the problem that the display mother board formed by three layers of glass substrates in the existing liquid crystal display panel can not normally split after cutting. The display mother board is provided with the notch in the second substrate in the interval area between the sub-display panels, and the orthographic projection of the cutting line for cutting the sub-display panels on the second substrate falls into the orthographic projection range of the notch on the second substrate, so that when the display mother board is cut to form each sub-display panel, the cutting knife wheel cuts the first substrate and the third substrate which are positioned at the outer side of the display mother board, the whole display mother board can normally crack during cracking, and the smooth cutting and cracking of the display mother board formed by three layers of substrates are realized.
The invention provides a display mother board which comprises a plurality of sub display panels arranged at intervals, wherein each sub display panel comprises a display liquid crystal box and a third substrate arranged on the light inlet side of the display liquid crystal box, liquid crystal is filled in a gap formed by the alignment of the third substrate and the display liquid crystal box, the display liquid crystal box comprises a second substrate and a first substrate which are mutually aligned, the second substrate is positioned between the first substrate and the third substrate, the first substrate, the second substrate and the third substrate extend to a spacing area between the sub display panels, a gap penetrating through the thickness of the second substrate is arranged in the spacing area, and the orthographic projection of a cutting line for cutting the sub display panels on the second substrate falls into the orthographic projection range of the gap on the second substrate.
Preferably, in the spaced area, an etching blocking structure is arranged on one side of the second substrate, which is away from the third substrate, and the etching blocking structure covers the notch.
Preferably, the etching barrier structure is made of an organic resin glue material.
Preferably, the width of the etching barrier structure along the width direction perpendicular to the extension direction of the cutting line is in the range of 80-100 μm; the thickness of the etching barrier structure along the direction vertical to the second substrate is 0.8-1.2 μm.
Preferably, the width of the opening of the notch is in the range of 25-35 μm.
The invention also provides a preparation method of the display mother board, which comprises the following steps: preparing a first substrate and a second substrate;
the first substrate and the second substrate are combined, and liquid crystal is filled in a combining gap to form a display liquid crystal box;
a notch is arranged in the second substrate;
and aligning the third substrate with the display liquid crystal box, and filling liquid crystal in the alignment gap.
Preferably, the preparation method further includes, after the preparing the first substrate and the second substrate, before the aligning the first substrate and the second substrate and filling the liquid crystal in the alignment gap:
and forming an etching barrier structure on the second substrate.
Preferably, the forming of the etch barrier structure on the second substrate includes:
coating and forming an organic resin adhesive film on the second substrate;
exposing and developing the organic resin adhesive film to form a pattern of the etching barrier structure;
preferably, the forming the notch in the second substrate includes:
irradiating the area of the second substrate, where the notch is to be formed, from the side of the second substrate, which is far away from the first substrate, by using laser so as to modify the material of the second substrate;
and placing the modified display liquid crystal box into etching liquid to etch off the modified part on the second substrate to form the notch.
The invention also provides a preparation method of the display panel, which comprises the following steps: cutting the display mother board prepared by the preparation method along a cutting line;
and splitting along the cut cutting line.
The invention has the beneficial effects that: according to the display mother board provided by the invention, the gap is formed in the second substrate in the interval area between the sub-display panels, and the orthographic projection of the cutting line for cutting the sub-display panels on the second substrate is in the orthographic projection range of the gap on the second substrate, so that when the display mother board is cut to form each sub-display panel, the cutting knife wheel can cut the first substrate and the third substrate which are positioned at the outer side of the display mother board, the whole display mother board can normally crack during cracking, and the smooth cutting and cracking of the display mother board formed by three layers of substrates are realized.
Drawings
FIG. 1 is a schematic cross-sectional view of a motherboard according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the structures of a first substrate and a second substrate according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a second substrate for forming an etching stop structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a liquid crystal display cell formed by joining a first substrate and a second substrate according to an embodiment of the present invention;
FIG. 5 is a schematic view illustrating a modification of a portion of a second substrate where a notch is to be formed according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view illustrating a liquid crystal cell after a notch is formed in a second substrate according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a display panel formed by cutting a display mother board according to an embodiment of the invention.
Wherein the reference numerals are:
1. a sub display panel; 2. a third substrate; 3. a second substrate; 30. a notch; 31. a second sub-substrate; 4. a first substrate; 40. a first sub-substrate; 5. a spacing region; 6. cutting a line; 7. etching the barrier structure; 8. and (4) laser.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, a display mother board, a manufacturing method thereof, and a display panel manufacturing method according to the present invention are described in further detail below with reference to the accompanying drawings and the detailed description.
The embodiment of the invention provides a display mother board, as shown in fig. 1, which includes a plurality of sub-display panels 1 arranged at intervals, wherein each sub-display panel 1 includes a display liquid crystal cell and a third substrate 2 arranged on a light incident side of the display liquid crystal cell, a gap formed by the alignment of the third substrate 2 and the display liquid crystal cell is filled with liquid crystal, the display liquid crystal cell includes a second substrate 3 and a first substrate 4 which are aligned with each other, the second substrate 3 is located between the first substrate 4 and the third substrate 2, the first substrate 4, the second substrate 3 and the third substrate 2 all extend to a gap area 5 between the sub-display panels 1, in the gap area 5, a gap 30 penetrating through the thickness of the second substrate 3 is formed, and an orthogonal projection range of a cutting line 6 for cutting the sub-display panel 1 on the second substrate 3 falls into an orthogonal projection range of the gap 30 on the second substrate 3.
The gap 30 is formed in the second substrate 3 in the interval area 5 between the sub-display panels 1, and the orthographic projection of the cutting line 6 for cutting the sub-display panels 1 on the second substrate 3 falls into the orthographic projection range of the gap 30 on the second substrate 3, so that when the display mother board is cut to form each sub-display panel 1, after the cutting knife wheel pair cuts the first substrate 4 and the third substrate 2 which are positioned on the outer side of the display mother board, the whole display mother board can normally crack during cracking, and the smooth cutting and cracking of the display mother board formed by three layers of substrates are realized.
Preferably, in this embodiment, in the spacing region 5, an etching blocking structure 7 is disposed on a side of the second substrate 3 away from the third substrate 2, and the etching blocking structure 7 covers the notch 30. Since the notch 30 is formed in the second substrate 3 in the spacing region 5 by etching the modified portion of the second substrate 3 on which the notch 30 is to be formed with the etching solution, the notch 30 is formed only after the portion of the second substrate 3 that is to be modified is etched, the second substrate 3 in the spacing region 5 generally includes a glass substrate and one or more insulating film layers (such as a gate insulating layer, a passivation layer, etc.) disposed thereon, and during the etching process of the portion of the second substrate 3 on which the notch 30 is to be formed with the etching solution, the etching solution is easy to enter the display liquid crystal cell from the notch 30 after etching the notch 30, which affects the quality of the display liquid crystal cell and the subsequent manufacturing process of the display mother board, the etching blocking structure 7 covering the notch 30 is disposed on the side of the second substrate 3 facing away from the third substrate 2, so as to block the etching solution from entering the display liquid crystal cell from the notch 30 when the notch 30 is formed by etching, thereby ensuring the quality of the display liquid crystal box and the normal operation of the subsequent preparation process of the display mother board.
Wherein, the etching barrier structure 7 is made of organic resin glue material. The etching liquid for etching the notch 30 usually adopts hydrofluoric acid which can etch glass, and the hydrofluoric acid can easily etch the insulating film layer of silicon nitride and silicon oxide materials, so that the etching barrier structure 7 made of organic resin materials cannot be etched by the etching liquid when the notch 30 is formed by etching the etching liquid, and the etching liquid can be prevented from entering the display liquid crystal box.
Preferably, in the present embodiment, the width of the etching barrier structure 7 along the width direction perpendicular to the extending direction of the cutting line 6 is in the range of 80-100 μm; the thickness of the etch barrier 7 in the direction perpendicular to the second substrate 3 is in the range of 0.8-1.2 μm. It is further preferred that the etch stop structure 7 has a width of 100 μm and a thickness of 1 μm. By such arrangement, the etching barrier structure 7 can cover the gap 30, so as to prevent the etching liquid from entering the display liquid crystal box.
In this embodiment, the opening width of the notch 30 is in the range of 25-35 μm. Preferably, the notch 30 has an opening width of 30 μm. With such an arrangement, the second substrate 3 can be smoothly cracked during the splitting process after the display mother board is cut.
Based on the above structure of the display motherboard, this embodiment further provides a method for manufacturing the display motherboard, including: step S01: preparing a first substrate 4 and a second substrate 3; as shown in figure 2 of the drawings, in which,
wherein the first substrate 4 comprises a plurality of first sub-substrates 40 and the second substrate 3 comprises a plurality of second sub-substrates 31. For example, the first sub-substrate 40 is a color filter substrate of a sub-display panel, and the second sub-substrate 31 is an array substrate of the sub-display panel.
Step S02: forming an etch stop structure 7 on the second substrate 3; as shown in figure 3 of the drawings,
the method specifically comprises the following steps: coating and forming an organic resin adhesive film on the second substrate; and exposing and developing the organic resin adhesive film to form a pattern of the etching barrier structure 7.
Step S03: the first substrate 4 and the second substrate 3 are jointed, and liquid crystal is filled in the joint gap to form a display liquid crystal box; as shown in figure 4 of the drawings,
step S04: a notch 30 is arranged in the second substrate 3;
the method specifically comprises the following steps: irradiating the area of the second substrate 3, where the notch is to be formed, with laser light 8 from the side of the second substrate 3 facing away from the first substrate 4 to modify the material of the second substrate 3; as shown in fig. 5; the modified display liquid crystal cell is placed in an etching solution to etch away the modified portion of the second substrate 3, forming a gap 30, as shown in fig. 6.
The second substrate 3 is made of glass, and the etching solution is hydrofluoric acid.
Step S05: the third substrate 2 is aligned with the display liquid crystal cell, and the alignment gap is filled with liquid crystal.
Based on the method for manufacturing a display mother board in this embodiment, this embodiment further provides a method for manufacturing a display panel, as shown in fig. 7, including: cutting the display mother board prepared by the above preparation method along a cutting line 6; the splinting is performed along the cut line 6. And the sub-display panel formed after the display mother board is split is the finally formed display panel.
The invention has the beneficial effects that: according to the display mother board provided by the invention, the gap is formed in the second substrate in the interval area between the sub-display panels, and the orthographic projection of the cutting line for cutting the sub-display panels on the second substrate is in the orthographic projection range of the gap on the second substrate, so that when the display mother board is cut to form each sub-display panel, the cutting knife wheel can cut the first substrate and the third substrate which are positioned at the outer side of the display mother board, the whole display mother board can normally crack during cracking, and the smooth cutting and cracking of the display mother board formed by three layers of substrates are realized.
The display panel prepared by the invention can be any product or component with a display function, such as an LCD panel, an LCD television, a display, a mobile phone, a navigator and the like.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A display mother board comprises a plurality of sub display panels arranged at intervals, wherein each sub display panel comprises a display liquid crystal box and a third substrate arranged at the light incident side of the display liquid crystal box, the gap formed by the third substrate and the display liquid crystal box which are combined is filled with liquid crystal, the display liquid crystal box comprises a second substrate and a first substrate which are combined with each other, the second substrate is positioned between the first substrate and the third substrate, the first substrate, the second substrate and the third substrate all extend to a spacing region between the sub display panels, characterized in that in the interval area, a notch penetrating the thickness of the second substrate is arranged in the second substrate, the orthographic projection of the cutting line for cutting the sub-display panel on the second substrate falls into the orthographic projection range of the notch on the second substrate.
2. The display motherboard according to claim 1, wherein in the spaced-apart region, a side of the second substrate facing away from the third substrate is provided with an etch stop structure, the etch stop structure covering the gap.
3. The display motherboard of claim 2, wherein the etch stop structure is made of an organic resin material.
4. The display motherboard according to claim 2, wherein the width of the etch stop structure in a width direction perpendicular to the extension direction of the dicing lines is in a range of 80-100 μm; the thickness of the etching barrier structure along the direction vertical to the second substrate is 0.8-1.2 μm.
5. The display mother board according to any one of claims 1 to 4, wherein the opening width of the notch is in a range of 25 to 35 μm.
6. A method of manufacturing a display mother panel according to any one of claims 1 to 5, comprising: preparing a first substrate and a second substrate;
the first substrate and the second substrate are combined, and liquid crystal is filled in a combining gap to form a display liquid crystal box;
a notch is arranged in the second substrate;
and aligning the third substrate with the display liquid crystal box, and filling liquid crystal in the alignment gap.
7. The method for manufacturing a display mother board according to claim 6, wherein the display mother board is the display mother board of claim 2, and the method further comprises, after the manufacturing the first substrate and the second substrate, before the aligning the first substrate and the second substrate and filling the alignment gap with the liquid crystal:
and forming an etching barrier structure on the second substrate.
8. The method of claim 7, wherein forming an etch stop structure on the second substrate comprises:
and coating and forming an organic resin adhesive film on the second substrate.
Exposing and developing the organic resin adhesive film to form a pattern of the etching barrier structure;
9. the method of manufacturing a display mother substrate according to claim 8, wherein the forming of the notch in the second substrate includes:
irradiating the area of the second substrate, where the notch is to be formed, from the side of the second substrate, which is far away from the first substrate, by using laser so as to modify the material of the second substrate;
and placing the modified display liquid crystal box into etching liquid to etch off the modified part on the second substrate to form the notch.
10. A method for manufacturing a display panel, comprising: cutting the display mother substrate prepared by the preparation method according to any one of claims 6 to 9 along a cutting line;
and splitting along the cut cutting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911046090.7A CN112748594B (en) | 2019-10-30 | 2019-10-30 | Display mother board, preparation method thereof and preparation method of display panel |
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| CN201911046090.7A CN112748594B (en) | 2019-10-30 | 2019-10-30 | Display mother board, preparation method thereof and preparation method of display panel |
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| CN112748594B CN112748594B (en) | 2023-01-24 |
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| CN112748594B (en) | 2023-01-24 |
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