CN111290180A - Technological method for producing large-size LCD (liquid Crystal display) in perfusion mode - Google Patents
Technological method for producing large-size LCD (liquid Crystal display) in perfusion mode Download PDFInfo
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- CN111290180A CN111290180A CN202010122253.1A CN202010122253A CN111290180A CN 111290180 A CN111290180 A CN 111290180A CN 202010122253 A CN202010122253 A CN 202010122253A CN 111290180 A CN111290180 A CN 111290180A
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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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- Crystallography & Structural Chemistry (AREA)
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Abstract
A process method for producing a large-size LCD by adopting a perfusion mode comprises the following steps: designing an optimal sealing position: the outermost seal location is located a pour radius 2/3 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 a 55-65-degree drying oven 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 5-10 mm in the empty boxes; moving the empty box of the liquid crystal swelling and the liquid crystal to an oven with the room temperature of 23 ℃ to swell the liquid crystal, and waiting for the liquid crystal to swell to 10-15 mm more than the position S where a cavity appears in the pre-pouring process; and moving the liquid crystal and the empty box of the liquid crystal expansion together to an oven at 55-65 ℃ until the liquid crystal is fully expanded. The cavity at the sealing side 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-size LCDs have been used in such fields due to electronization of bus stop boards, and black and white large-size LCDs are cheaper than TFTLCDs and can be customized in size, so that black and white large-size LCDs have also been used to some extent in such applications. 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 location is located a pour radius 2/3 from the side edge.
Step two, pre-filling, recording the position of a cavity:
1) firstly, 2 or 3 liquid crystal empty boxes and 2-3 g of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach 0.01 Pa;
2) the liquid crystal empty box falls down to contact with 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 in batches and 7-10 g of liquid crystal, and placing the empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach 0.01 Pa;
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 swelling and the liquid crystal to an oven with the room temperature of 23 ℃ to swell the liquid crystal, and waiting for the liquid crystal to swell to 10-15 mm more than the position S where a cavity appears in the pre-pouring process;
4) and moving the liquid crystal and the empty box of the liquid crystal expansion together to an oven at 55-65 ℃ 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 at the most edge 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 cell 2-seal 3-cavity 4 at frame corner of seal side-pouring radius 5-outermost seal position 6-cavity position 7-crystal expansion height of 23 deg. at room temperature during pre-pouring.
Detailed Description
The following detailed description of the present invention will be made with reference to 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 location is located a pour radius 2/3 from the side edge.
Step two, pre-filling, recording the position 6 of a cavity:
1) firstly, 2 or 3 liquid crystal empty boxes and 2-3 g of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach 0.01 Pa;
2) the liquid crystal empty box falls down to contact with 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) hole sites 6 are recorded.
Step three, formally pouring in batches:
1) taking 30-40 empty boxes in batches and 7-10 g of liquid crystal, and placing the empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach 0.01 Pa;
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 swelling and the liquid crystal to an oven with the room temperature of 23 ℃ to swell the liquid crystal, and waiting for the liquid crystal to swell to 7-15 mm, wherein the height of the liquid crystal is 10-15 mm higher than the position 6 where a hole appears in the pre-pouring process;
4) and moving the liquid crystal and the empty box of the liquid crystal expansion together to an oven at 55-65 ℃ until the liquid crystal is fully expanded.
Firstly, 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 are spaced more than 1.5 infusion radii 4 from the vertical border line. The distance between the two sealing positions in the figure 3 is 1.8-2.3 filling radiuses 4, and the distance between the outermost sealing position 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, the empty box in the figure 1 has cavities 3 at the edge corner of the seal side after the liquid crystal is full, and the liquid crystal is difficult to full. 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 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.
Second, the process setting for improving the pouring efficiency
1) In order to improve the filling efficiency, the empty box and the liquid crystal groove which are being filled are often moved into an oven together in production, and the temperature of the oven is set to be 50-70 ℃ so that the empty box can be 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, in order to avoid the occurrence of cavities, normal-temperature filling is adopted, and when the crystal expansion height exceeds the cavity position 6 recorded in the pre-filling process, the crystal expansion height is transferred into a 60-DEG oven and then is placed in a liquid crystal filling box.
After a certain vacuum degree in the filling box is less than 0.01Pa, the LCD empty box falls on a shelf, the seal 2 of the empty box 1 is contacted with 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 tank are taken out together and placed at the room temperature of 23 ℃, after the liquid crystal expands by 10-15 mm after passing through the position 6 where the hole appears in the pre-filling in the empty box 1, such as the liquid crystal rising position 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 is fully swelled, 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, a cavity or the like occurs when the liquid crystal is expanded to a certain height (generally, 2/3 height of the empty box). Therefore, the liquid crystal tank and the empty box 1 are placed at the room temperature of 23 ℃ until the liquid crystal rises to a certain height, generally 10-15 mm beyond the position where the liquid crystal is directly placed in the oven and has a cavity, and then the liquid crystal tank and the empty box 1 are moved into the oven at 60 ℃, so that 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 by adopting a perfusion mode is characterized by comprising the following steps:
step one, designing an optimal sealing position: the outermost seal position is set to be 2/3 of filling 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 2-3 g of liquid crystal are taken and placed in a filling machine, and the filling machine is vacuumized to reach 0.01 Pa;
2) the liquid crystal empty box falls down to contact with 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) recording the hole position S;
step three, formally pouring in batches:
1) taking 30-40 empty boxes in batches and 7-10 g of liquid crystal, and placing the empty boxes and the liquid crystal in a filling machine, wherein the filling machine is vacuumized to reach 0.01 Pa;
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 swelling and the liquid crystal to an oven with the room temperature of 23 ℃ to swell the liquid crystal, and waiting for the liquid crystal to swell to 10-15 mm more than the position S where a cavity appears in the pre-pouring process;
4) and moving the liquid crystal and the empty box of the liquid crystal expansion together to an oven at 55-65 ℃ until the liquid crystal is fully expanded.
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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. |
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