CN111290180B - Technological method for producing large-size LCD in perfusion mode - Google Patents
Technological method for producing large-size LCD in perfusion mode Download PDFInfo
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- CN111290180B CN111290180B CN202010122253.1A CN202010122253A CN111290180B CN 111290180 B CN111290180 B CN 111290180B CN 202010122253 A CN202010122253 A CN 202010122253A CN 111290180 B CN111290180 B CN 111290180B
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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
- G02F1/1341—Filling or closing of cells
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Abstract
A process method for producing a large-size LCD in a perfusion mode comprises the following steps: designing an optimal sealing position: the outermost seal position is set to be 2/3 of the pouring radius from the side edge. Pre-filling, namely taking 2 or 3 liquid crystal empty boxes, placing 2-3 g of liquid crystal in a filling machine, and after the liquid crystal expands for 5-10 mm in the empty boxes, placing the liquid crystal and the empty boxes which are being filled into an oven at 55-65 ℃ to expand the liquid crystal; and recording the hole position S after the liquid crystal is fully expanded. Formal batch perfusion: taking 30-40 empty boxes in batches, placing 7-10 g of liquid crystal in a filling machine, and waiting for the liquid crystal to expand by 5-10 mm in the empty boxes; moving the empty box and the liquid crystal of the liquid crystal to an oven at the room temperature of 23 ℃ to expand the liquid crystal, and waiting for the liquid crystal to expand to exceed 10-15 mm of the position S where the hole appears in the pre-pouring process; and moving the liquid crystal and the empty box for expanding the liquid crystal to an oven with the temperature of 55-65 ℃ together until the liquid crystal is fully expanded. Sealing side cavities can be avoided; the hole position obtained by pre-filling can be utilized to ensure that the formal filling process is accurate and quick, the filling time is shortened, and the filling efficiency is improved.
Description
Technical Field
The invention relates to the technical field of display manufacturing processes, in particular to a process method for producing a large-size LCD in a pouring mode.
Background
In recent years, large-sized LCDs have been used in such fields as electronic bus stop boards, and black and white large-sized LCDs have also been used in such applications because they are cheaper than TFTLCDs and can be customized in size. However, the general size of the black and white LCD is smaller, and the size of 5 inches is the largest size of the previously produced products, so the manufacturing process of the black and white LCD adopts the filling mode, but the sizes of the bus stop boards are all larger, and more than 14 inches and 16 inches, and the original filling mode is not suitable for the production of the large-size LCD.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a process method for producing a large-size LCD in a perfusion mode, which solves the problems in the production of the large-size LCD.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process method for producing a large-size LCD by adopting a perfusion mode comprises the following steps:
step one, designing an optimal sealing position: the outermost seal position is set at a position 2/3 of the infusion radius from the side edge.
Step two, pre-filling, recording the position of a cavity:
1) Firstly, 2 or 3 liquid crystal empty boxes and 2 to 3 grams of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach less than 0.01Pa;
2) The liquid crystal empty box falls to contact with the liquid crystal, and after the liquid crystal expands by 5-10 mm in the empty box, the liquid crystal and the empty box which is being filled are placed into an oven at 55-65 ℃ to expand the liquid crystal;
3) After the liquid crystal is full, taking out the LCD full of the liquid crystal, placing the LCD under a light table to check bubbles, and finding that holes are formed at a certain position;
4) The hole position S is recorded.
Step three, formally pouring in batches:
1) Taking 30-40 empty boxes and 7-10 g of liquid crystal in batches, and placing the empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach 0.01Pa;
2) After the empty box falls down and contacts the liquid crystal, the liquid crystal expands by 5-10 mm in the empty box;
3) Moving the empty box and the liquid crystal of the liquid crystal to an oven at the room temperature of 23 ℃ to expand the liquid crystal, and waiting for the liquid crystal to expand to exceed 10-15 mm of the position S where the hole appears in the pre-pouring process;
4) And moving the liquid crystal and the empty box for expanding the liquid crystal to an oven with the temperature of 55-65 ℃ together until the liquid crystal is fully expanded.
Compared with the prior art, the invention has the beneficial effects that:
1) The influence of the sealing position of the edge most part on the cavity at the sealing side is great, the optimum sealing position designed by the invention can be verified to be the optimum sealing position through tests, and the cavity at the sealing side can be avoided;
2) The hole position obtained by pre-filling can be utilized to ensure that the formal filling process is accurate and quick, the filling time is shortened, and the filling efficiency is improved.
Drawings
FIG. 1 is a diagram of the cavity at the edge of the frame at the edge-most seal location and seal side;
FIG. 2 is a schematic view of the radius of perfusion;
FIG. 3 is a schematic view of the optimal sealing position;
fig. 4 is a graph of hole location versus room temperature at 23 degrees crystal expansion height for pre-fill.
In the figure: 1-liquid crystal empty box 2-seal 3-cavity 4 at frame corner of seal side-filling radius 5-outermost seal position 6-cavity position 7 during pre-filling-room temperature 23 degree crystal expansion height.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings.
A process method for producing a large-size LCD by adopting a perfusion mode comprises the following steps:
step one, designing an optimal sealing position: as shown in FIG. 3, the outermost seal locations are set at 2/3 of the infusion radius from the side edges.
Step two, pre-filling, recording the position 6 of a cavity:
1) Firstly, 2 or 3 liquid crystal empty boxes and 2 to 3 grams of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach less than 0.01Pa;
2) The liquid crystal empty box falls down to contact with the liquid crystal, and after the liquid crystal expands by 5-10 mm in the empty box, the liquid crystal and the empty box which is being filled are placed into an oven at 55-65 ℃ together to expand the liquid crystal;
3) After the liquid crystal is full, taking out the LCD full of the liquid crystal, placing the LCD under a light table to check bubbles, and finding that holes are formed at a certain position;
4) Hole sites 6 are recorded.
Step three, formally pouring in batches:
1) Taking 30-40 empty boxes and 7-10 g of liquid crystal in batches, and placing the empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach less than 0.01Pa;
2) After the empty box falls down and contacts the liquid crystal, the liquid crystal expands by 5-10 mm in the empty box;
3) Moving the empty box of the liquid crystal expansion and the liquid crystal to an oven with the room temperature of 23 ℃ to expand the liquid crystal, and waiting for the liquid crystal to expand the height of 7 to exceed 10-15 mm of the position 6 of a cavity in the pre-pouring process as shown in figure 4;
4) And moving the liquid crystal and the empty box for expanding the liquid crystal to an oven with the temperature of 55-65 ℃ together until the liquid crystal is fully expanded.
1. Setting of sealing position
In order to test the influence of the size and number of seals on the filling, a combination of several ways was tested, the objective being considered to enable the liquid crystal to rise gradually from bottom to top uniformly in the empty LCD cell.
Referring to fig. 1-2, when the liquid crystal starts to rise in the empty cell, it gradually expands outward in a circle with the sealing position 2 as the center. The length of the seal 2 to the outermost edge of the maximum circle is named the pouring radius 4. The large-size LCD perfusion radius is generally 40 mm.
Fig. 1 and 3, both of which are schematic views of the number and location of the seals 2 of an LCD empty cell when filled. The number of seals in both figures is 2, the two seals 2 in figure 1 are spaced less than 1.5 infusion radii 4 and greater than 1.5 infusion radii 4 from the vertical rim line. The distance between the two seal positions in fig. 3 is 1.8-2.3 filling radiuses 4, and the distance between the outermost seal and the vertical frame line is 2/3 filling radiuses.
In the two kinds of empty boxes at the position of the seal 2, the same liquid crystal is filled, and under the condition that the vacuum is the same, after the empty box in fig. 1 is filled with the liquid crystal, a cavity 3 is easy to appear at the edge frame corner at the seal side, and the liquid crystal is difficult to fill. Causing a hole defect.
The hollow box in fig. 3 does not present such a void problem.
And (4) conclusion: from the above two comparative experiments, it can be known that when the large-sized LCD is applied with the filling process, the outermost seal 2 should be located at 2/3 of the filling radius of the vertical frame (as shown in fig. 3), and the seal 2 is located too close to the middle, which may result in the formation of cavities 3 at the corners of the seal sides.
2. Process setting for improving perfusion efficiency
1) In order to improve the filling efficiency, the empty box and the liquid crystal tank which are being filled are often moved into an oven in production, and the temperature of the oven is set to be 50-70 ℃ so that the empty box is filled as soon as possible.
After a certain vacuum degree in the filling box is reached to be less than 0.01Pa, the LCD empty box falls on a shelf, the seal 2 of the empty box 1 is contacted with the liquid crystal, after the liquid crystal slightly expands by 10mm in the empty box 1, the filling box is inflated, the empty box 1 and the liquid crystal groove are taken out together and directly placed in a 60-DEG oven, and after the empty box is fully expanded by the liquid crystal. The light table inspection revealed that voids appeared at a certain height of the empty cell 1 in the filled liquid crystal LCD.
2) In the process, normal-temperature filling is adopted to avoid the occurrence of cavities, and when the crystal expansion height exceeds the cavity position 6 recorded in the pre-filling process, the crystal is transferred into an oven with the temperature of 60 ℃ and placed in a liquid crystal filling box.
After the liquid crystal in the empty box rises to a certain degree of vacuum of less than 0.01Pa, the LCD empty box falls off the shelf, the seal 2 of the empty box 1 is contacted with the liquid crystal, after the liquid crystal slightly rises by 10mm in the empty box 1, the empty box is inflated to the filling box, the empty box 1 and the liquid crystal tank are taken out together and placed at the room temperature of 23 ℃, after the liquid crystal rises by 10-15 mm after rising through the position 6 where the hole is formed in the empty box 1 in advance, for example, the liquid crystal rises in the position shown in figure 4, the empty box 1 and the liquid crystal tank are placed in a 60-degree oven together, and after the liquid crystal fully rises, no hole defect is found in the LCD filled with the liquid crystal.
And (4) conclusion: from the above comparative experiments, it is known that when the empty box 1 and the liquid crystal are directly placed in a 60-degree oven to expand the liquid crystal, the liquid crystal will have a cavity or the like when the liquid crystal is expanded to a certain height (generally, 2/3 of the height of the empty box). Therefore, the liquid crystal tank and the empty box 1 should be placed at 23 ℃ of room temperature, when the liquid crystal rises to a certain height, generally 10-15 mm beyond the position where the cavity appears in the oven, the liquid crystal tank and the empty box 1 are moved to the 60 ℃ oven, the defect of the cavity cannot be found, and the filling efficiency is improved.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (1)
1. A process method for producing a large-size LCD in a perfusion mode is characterized by comprising the following steps:
step one, designing an optimal sealing position of a liquid crystal empty box: the outermost sealing position in the optimal sealing positions is set to be 2/3 of the filling radius away from the side edge of the liquid crystal empty box;
step two, pre-filling, recording the position of a cavity:
1) Firstly, 2 or 3 liquid crystal empty boxes and 2 to 3 grams of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach less than 0.01Pa;
2) The liquid crystal empty box falls down to contact with the liquid crystal, and after the liquid crystal expands by 5-10 mm in the liquid crystal empty box, the liquid crystal and the liquid crystal empty box which is being filled are placed into an oven at 55-65 ℃ to expand the liquid crystal;
3) After the liquid crystal is fully filled, taking out the liquid crystal empty box filled with the liquid crystal, placing the empty box under an optical bench to check a cavity, and finding that the cavity is arranged at a certain position;
4) Recording the hole position S;
step three, formally pouring in batches:
1) Taking a batch of 30-40 liquid crystal empty boxes and 7-10 g of liquid crystal, and placing the liquid crystal empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach less than 0.01Pa;
2) After the liquid crystal empty box falls down and contacts the liquid crystal, the liquid crystal is expanded by 5-10 mm in the liquid crystal empty box;
3) Moving the liquid crystal empty box and the liquid crystal of the liquid crystal to an oven at the room temperature of 23 ℃ to expand the liquid crystal, and waiting for the liquid crystal to expand to exceed 10-15 mm of the position S where the hole appears in the pre-pouring process;
4) And moving the liquid crystal and the liquid crystal empty box for expanding the liquid crystal to an oven with the temperature of 55-65 ℃ together until the liquid crystal is fully expanded.
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| CN108363223A (en) * | 2018-01-19 | 2018-08-03 | 精电(河源)显示技术有限公司 | A kind of liquid crystal display production method for reducing bubble and generating |
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| JPH11264991A (en) * | 1998-01-13 | 1999-09-28 | Matsushita Electric Ind Co Ltd | Manufacture of liquid crystal display element |
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| JPH07230090A (en) * | 1994-02-21 | 1995-08-29 | Matsushita Electric Ind Co Ltd | Liquid crystal display device and its production |
| JP2002258296A (en) * | 2001-02-28 | 2002-09-11 | Seiko Epson Corp | Liquid crystal injection system, liquid crystal injection method and method of manufacturing liquid crystal display |
| CN101169563A (en) * | 2006-10-23 | 2008-04-30 | 比亚迪股份有限公司 | Production process control method for reducing liquid crystal bubble generation in LCD production |
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Address after: No.288, Yueling Road, Lishan District, Anshan City, Liaoning Province, 114000 Patentee after: Yashi Optoelectronics (Group) Co.,Ltd. Address before: No.288, Yueling Road, Lishan District, Anshan City, Liaoning Province, 114000 Patentee before: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. |