CN113296294B - Method for improving yield of sealing glue of display panel - Google Patents
Method for improving yield of sealing glue of display panel Download PDFInfo
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- CN113296294B CN113296294B CN202110460725.9A CN202110460725A CN113296294B CN 113296294 B CN113296294 B CN 113296294B CN 202110460725 A CN202110460725 A CN 202110460725A CN 113296294 B CN113296294 B CN 113296294B
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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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
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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
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention relates to a method for improving the yield of sealing glue of a display panel, which comprises the following steps: step one, pasting electrostatic adhesive paper at the corners of a display panel; secondly, placing the display panel on a rotatable platform, wherein the platform is obliquely arranged; coating a sealant on the edge of the side edge of the top of the display panel, filling a gap on the side edge of the top of the display panel after the sealant is cured, and sticking electrostatic adhesive paper on two ends of the side edge of the top of the display panel; fourthly, the rotating platform drives the display panel to rotate until one of the side edges of the display panel which are not subjected to the glue sealing treatment rotates to the top of the display panel; and step five, repeating the step three and the step four until the display panel finishes the sealing treatment.
Description
Technical Field
The invention relates to the field of display screen production and manufacturing, in particular to a method for improving the yield of sealing glue of a display panel.
Background
In order to meet the requirements of consumers on the lightness, thinness and ultra-narrow frame of consumer electronic products with display panels, such as mobile phones, etc., the display panels need to be further processed, including thinning, polishing, cutting, sealing and drilling, but the display panels have the technical problems in the process of further processing: the sealing process section is located between the cutting process section and the drilling process section, so that if the display panel is sealed poorly, acid liquor and/or alkali liquor enters the inside of the display panel and corrodes the circuit of the display panel in the drilling process, thereby damaging the display panel.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for improving the sealing yield of a display panel, which avoids poor sealing by improving the sealing method of the display panel, thereby preventing the display panel from corroding a circuit on a thin film transistor substrate by acid liquor and/or alkali liquor in a drilling process.
In order to realize the purpose, the invention adopts the following technical scheme: a method for improving the yield of sealing compound of a display panel comprises the following steps:
step one, pasting electrostatic adhesive paper at the edge of the cut display panel, wherein the projection of the electrostatic adhesive paper on the display panel covers the edge of the display panel;
secondly, placing the display panel on a rotatable platform, wherein the platform is arranged in an inclined manner, and the included angle between the platform and the horizontal plane is 30-80 degrees;
step three, coating sealant on the edge of the side edge at the top of the display panel, filling the gap of the side edge after the sealant is cured, sticking electrostatic adhesive paper on the two ends of the side edge at the top of the display panel, and specifically coating the sealant in a path that: coating the sealant from the leftmost side of the left electrostatic gummed paper to the rightmost side of the right electrostatic gummed paper along the direction of the side edge, or coating the sealant from the rightmost side of the right electrostatic gummed paper to the leftmost side of the left electrostatic gummed paper along the direction of the side edge;
fourthly, the rotating platform drives the display panel to rotate until one of the side edges of the display panel which are not subjected to the glue sealing treatment rotates to the top of the display panel;
and step five, repeating the step three and the step four until the display panel finishes the sealing treatment.
In step one, the display panel is cut and separated from a larger display panel (hereinafter referred to as "mother board"), and the mother board is cut into a plurality of display panels, or a plurality of display panels are fabricated on the mother board. The display panel is one of a liquid crystal display panel, an OLED display panel and a plasma display panel.
In the first step, the electrostatic adhesive paper is pasted at the corners of the display panel, so that the effective stroke redundancy and the adhesive sealing amount of the adhesive sealant can be increased in the process of coating the adhesive sealant in the third step.
In the second step, the platform is obliquely arranged, so that the display panel placed on the platform is also obliquely arranged, and the speed of the sealant entering the gap can be increased by utilizing gravity in the sealant coating process in the third step, thereby enhancing the sealant sealing effect.
The invention relates to a method for improving drilling corrosion, which avoids bad screen circuit corrosion caused by bad sealing glue by improving a sealing glue method.
The invention provides a method for improving the yield of sealing glue of a display panel, which can reduce poor sealing glue and reduce the quantity of display panels subjected to sealing glue inspection and secondary reworking.
The following description will be given with reference to specific examples.
Drawings
The figures further illustrate the invention, but the examples in the figures do not constitute any limitation of the invention.
Fig. 1 is a front view of a motherboard provided in an embodiment of the present invention.
Fig. 2 is a left side view of a motherboard according to an embodiment of the present invention.
Fig. 3 is a front view of a second display panel according to an embodiment of the present invention.
Wherein the reference numerals are: 1. a motherboard; 11. a color film substrate; 12. a thin film transistor substrate; 13. sealing the rubber frame; 21. a first display panel; 22. and a second display panel.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The display panel and the mother substrate 1 described in the embodiments of the present invention are both liquid crystal display panels. As shown in fig. 2, the mother substrate 1 is composed of a color filter substrate 11, a thin film transistor substrate 12, a liquid crystal (not shown in the drawing) sandwiched between the color filter substrate and the thin film transistor substrate, and a sealant frame 13. The color film substrate 11 and the thin film transistor substrate 12 are glass substrates.
The thinning processing of the display panel in the embodiment of the invention comprises the following steps:
s1, cleaning the outer surface of a mother board 1 after the box by using acetone and ethanol;
s2, immersing the cleaned mother board 1 in an attenuation etching solution, and carrying out attenuation treatment on the mother board 1;
s3, washing the thinned mother board 1 with clear water, then grinding and polishing the two sides, washing with clear water and drying;
s4, as shown in FIG. 1, cutting the mother board 1 (the cutting route corresponds to the dotted line in FIG. 1), and obtaining eight display panels including a first display panel 21 and a second display panel 22 after cutting one mother board 1;
s5, performing glue sealing treatment on the display panel obtained after cutting;
s6, drilling is conducted on the display panel subjected to the sealing glue treatment, and the drilling part can be used for installing and fixing a camera, infrared induction, a loudspeaker and the like, so that the effective display area of the display panel can be further increased through the drilling treatment.
If the display panel is sealed poorly in step S5, acid solution and/or alkali solution may enter between the display color film substrate 11 and the thin film transistor substrate 12 in step S6 and corrode a circuit on the thin film transistor substrate 12, thereby damaging the display panel.
Therefore, the method for improving the yield of the display panel sealant provided in the present embodiment is suitable for the first display panel 21 and the second display panel 22. The first display panel 21 includes four first sides (corresponding to 211, 212, 213, 214 in fig. 1), and the second display panel 22 includes four second sides (corresponding to 221, 222, 223, 224 in fig. 1).
The sealant frame 13 is filled in the gap between the first side edge 211 and the gap between the first side edge 212 of the first display panel 21, so that the sealant process is only required to be performed on the first side edge 213 and the first side edge 214 of the first display panel 21.
The sealant frame 13 is filled in the gap between the second side 221 of the second display panel 22, so that the sealant treatment needs to be performed on the second side 222, the second side 223, and the second side 224 of the second display panel 22.
When the method for improving the yield of the display panel sealant provided by the embodiment is applied to the second display panel 22, the method specifically includes the following steps:
s101, as shown in fig. 3, attaching electrostatic adhesive paper (corresponding to 31, 32, 33, 34 in fig. 3) to four corners of the second display panel 22, wherein an adhesion area (corresponding to 41, 42, 43, 44 in fig. 3) of the electrostatic adhesive paper on the second display panel 22 completely covers the corners of the second display panel 22;
s102, placing the second display panel 22 on a rotatable platform, wherein the platform is arranged in an inclined manner, and the included angle between the platform and the horizontal plane is 30-80 degrees;
s103, coating the sealant on the edge of the second side edge 222 located at the top of the second display panel 22, filling the gap of the side edge after the sealant is cured, wherein the coating path specifically includes: coating the sealant from the leftmost side of the left electrostatic adhesive paper 31 to the rightmost side of the right electrostatic adhesive paper 32 along the edge of the second side 222, wherein the length of the sealant coating path is b, the length of the second side 222 is a, and b is greater than a;
s104, rotating the platform clockwise or anticlockwise, and driving the second display panel 22 to rotate synchronously until one of the side edges of the second display panel 22 which are not subjected to the sealing glue treatment rotates to the top of the display panel;
s105, repeating S103 and S104 until the second display panel 22 is sealed.
When the existing sealing technical scheme is adopted to carry out sealing treatment on the second display panel 22, the poor sealing easily occurs at the corner, and the reason is as follows: firstly, as the solid sealant frame 13 is filled in the gap of the second side 221 of the second display panel 22, the solid sealant formed after the sealant is coated cannot be well fused with the sealant frame 13; and secondly, the corners are starting ends or terminal ends when the sealant is coated, and the path of coating the sealant is easy to lack of stroke to cause the shortage of the sealant. Therefore, in the method for improving the yield of the display panel sealant provided in this embodiment, the electrostatic adhesive paper is added at the four corners of the second display panel 22 to increase the stroke (corresponding to b > a in fig. 3) and the amount of the sealant applied, so as to increase the connection between the adjacent second side edges.
Meanwhile, when the second display panel 22 is coated with the sealant, since the second display panel 22 is placed on the inclined platform, an included angle between the second display panel 22 and the horizontal plane is 30 to 80 degrees, and when the sealant is coated on the edge of the second side edge 222 in the step S103, the sealant is in a flowing liquid state and is not cured, so that the speed of the sealant flowing into the gap of the second side edge 222 is increased by using the gravity action. The range of the included angle between the second display panel 22 and the horizontal plane is the optimal range obtained after multiple tests, and if the included angle between the second display panel 22 and the horizontal plane is less than 30 degrees, the speed of the sealant flowing into the gap on the side edge of the second display panel 22 is too low, so that the sealant seepage depth is insufficient, and the filling and sealing of the sealant on the gap are affected; if the angle between the second display panel 22 and the horizontal plane is greater than 80 °, the sealant flows into the gap between the side edges of the second display panel 22 at an excessive speed, so that the sealant cannot be cured at the edges of the side edges.
Compared with the conventional sealing technical scheme, the method for improving the yield of the sealing compound of the display panel can reduce the poor sealing compound of the display panel from 6% to below 0.03%, so that the corrosion damage of the display panel during drilling treatment is reduced from 3.6% to below 0.01%.
The specific structure of the platform is not limited in the embodiment of the invention, the platform can be a rotatable platform disclosed in the prior art, and the platform needs to be capable of fixing the display panel and driving the display panel to rotate.
The curing mode of the sealant in this embodiment may be normal temperature fixing, photo-curing or thermosetting.
The method for improving the yield of the display panel package is suitable for the first display panel 21, and only the first side 213 and the first side 214 of the first display panel 21 are processed in the above steps.
Test of sealing effect
The experimental groups 1-4 all adopt two 50cm multiplied by 50cm glass substrates which are aligned and laminated, a supporting body for a display panel is arranged between the two glass substrates, the thickness of the two glass substrates is 1.2mm, and the adopted sealant for testing is the existing UV sealant. The experimental groups 1 to 3 adopt the method for improving the yield of the display panel by sealing adhesive to perform the sealing adhesive treatment on four sides, and the differences are only that: during the glue sealing treatment, the included angle between the glass substrate of the experimental group 1 and the horizontal plane is 30 degrees, the included angle between the glass substrate of the experimental group 2 and the horizontal plane is 55 degrees, and the included angle between the glass substrate of the experimental group 3 and the horizontal plane is 80 degrees. The experiment group 4 adopts the existing sealing technical scheme to carry out sealing treatment on four sides.
The comparative test results are as follows:
testing one: the glue penetration depth is not obvious in the difference on the glue penetration depth after the sealing glue of the experimental groups 1-3 is cured through comparison and observation, but is 1-2mm larger than that of the experimental group 4.
And (2) testing: after the glass substrate after the curing of the sealant is placed into an aqueous solution containing a pigment (whether the inside of the glass substrate is seeped or not can be conveniently observed) and soaked for 1h and 30min, no phenomenon of seeping is found in the glass substrates of the experimental groups 1-3, and no phenomenon of seeping is found in the glass substrate of the experimental group 4.
According to the sealing effect test, the method for improving the yield of the display panel can reduce poor sealing compared with the prior art.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (4)
1. A method for improving the yield of sealing glue of a display panel is characterized by comprising the following steps:
step one, sticking electrostatic adhesive paper at the corner of a display panel;
placing the display panel on a rotatable platform, wherein the platform is arranged in an inclined manner, and an included angle between the platform and the horizontal plane is 30-80 degrees;
step three, coating sealant on the edge of the side edge at the top of the display panel, filling the gap of the side edge at the top of the display panel after the sealant is cured, sticking the electrostatic adhesive paper on the two ends of the side edge at the top of the display panel, and coating the sealant by the following path: coating the sealant from the leftmost side of the left electrostatic gummed paper to the rightmost side of the right electrostatic gummed paper along the direction of the side edge, or coating the sealant from the rightmost side of the right electrostatic gummed paper to the leftmost side of the left electrostatic gummed paper along the direction of the side edge;
rotating the platform to drive the display panel to rotate until one of the side edges of the display panel which is not subjected to the glue sealing treatment rotates to the top of the display panel;
and step five, repeating the step three and the step four until the display panel finishes the glue sealing treatment.
2. The method of claim 1, wherein: the display panel is a liquid crystal display panel.
3. The method of claim 2, wherein: and cutting the display panel in the first step.
4. The method of claim 1, wherein: and the projection of the electrostatic adhesive paper on the display panel covers the corners of the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110460725.9A CN113296294B (en) | 2021-04-27 | 2021-04-27 | Method for improving yield of sealing glue of display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110460725.9A CN113296294B (en) | 2021-04-27 | 2021-04-27 | Method for improving yield of sealing glue of display panel |
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| CN113296294A CN113296294A (en) | 2021-08-24 |
| CN113296294B true CN113296294B (en) | 2023-04-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005084323A (en) * | 2003-09-08 | 2005-03-31 | Seiko Epson Corp | Method for manufacturing electrooptical device and electronic appliance |
| KR20070071493A (en) * | 2005-12-30 | 2007-07-04 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and method of manufacturing the same |
| CN101881909B (en) * | 2010-06-29 | 2012-09-05 | 友达光电股份有限公司 | Display panel and manufacturing method thereof |
| CN102262321A (en) * | 2011-08-26 | 2011-11-30 | 深圳市华星光电技术有限公司 | Substrate, liquid crystal display panel, liquid crystal display device and sealant coating method |
| CN203465690U (en) * | 2013-08-06 | 2014-03-05 | 和鑫光电股份有限公司 | Touch panel and liquid crystal display device composed by same |
| CN205539804U (en) * | 2016-04-07 | 2016-08-31 | 秦皇岛波盾电子有限公司 | LCD screen nation processes surely and uses frock |
| CN106814508B (en) * | 2017-03-14 | 2020-05-19 | 武汉华星光电技术有限公司 | Liquid crystal display panel |
| CN107340651B (en) * | 2017-08-07 | 2020-05-05 | 武汉华星光电半导体显示技术有限公司 | Frame glue coating method |
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