JP3759326B2 - Manufacturing method and manufacturing apparatus for liquid crystal display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manufacturing method and a manufacturing apparatus of a liquid crystal display device applied to a display unit of various products such as a mobile phone, a notebook personal computer, a word processor, a liquid crystal television, a watch, an electronic desk calculator, an electronic notebook, etc. The present invention relates to a manufacturing method and a manufacturing apparatus of a liquid crystal display device having a spacer spraying process for securing a gap (cell gap) between a pair of substrates in which is enclosed.
[0002]
[Prior art]
A liquid crystal cell of a liquid crystal display device is, for example, as shown in FIG. 6, in which a liquid crystal 103 is sealed in a gap (gap) Gp between two transparent substrates 101 and 102 made of a glass substrate, a plastic substrate, or a film substrate. The substrate is provided with a color filter 104, an alignment film 105, transparent electrodes 106, 107, and the like, and a peripheral sealant 108 and a seal internal spacer 109 are provided around the substrate to ensure a gap Gp between the substrates. Internal spacer 110 is provided.
[0003]
In the liquid crystal display device having such a cell structure, it is necessary to precisely control the thickness of the liquid crystal layer, that is, the gap Gp between the substrates, according to the optical characteristics of the liquid crystal generally used. Especially in liquid crystal display devices using STN (super twisted nematic) liquid crystal, the accuracy of gap control by spacers is an important factor affecting display quality, and the high speed response, high contrast, and wide viewing angle in liquid crystal display devices are important. In order to achieve this, it is necessary to accurately set the thickness of the liquid crystal layer in accordance with the optical characteristics of the liquid crystal. In particular, in a large liquid crystal display device, if the thickness of the liquid crystal layer varies, display unevenness is generated accordingly, and the display quality is significantly deteriorated. Therefore, the gap control is important. In addition, when a light and thin liquid crystal cell is required as in a liquid crystal display device used for a mobile phone, a wristwatch, etc., a film substrate is used as the substrate, but since the film substrate is flexible and easily bent, In order to keep the gap between the substrates constant and to maintain the flatness of the substrate surface, it is necessary to control the gap by distributing spacers between the substrates.
[0004]
In order to control the gap between the substrates, a spacer interposed in the gap between the pair of substrates 101 and 102 such as the internal spacer 110 shown in FIG. 6 is used. It is a spacer made of spherical plastic particles or silica particles of about 3 to 15 μm. Unlike the seal spacer provided around the substrate, this spacer is distributed in the gap between the substrates, keeping the gap (gap Gp) between the two substrates accurately over a wide area. The thickness of the liquid crystal layer is controlled. Further, the granular spacers can be scattered over the entire surface between the substrates, and the spacers do not overlap each other, so that the gap between the substrates can be kept uniform.
[0005]
In the process of assembling the liquid crystal cell in the case where the spacer is used in the manufacturing process of the liquid crystal display device, first, among the pair of transparent substrates, the spacers are dispersedly arranged on the electrode forming surface of one of the transparent substrates, and a sealing material is provided around the periphery. A procedure is employed in which a cell is formed by stacking the other coated substrate on top of this to form a cell, and injecting liquid crystal into the gap between the two transparent substrates, ie, the cell gap. Here, methods commonly used as a spacer spraying method include a wet spraying method and a wet coating method.
[0006]
Various proposals have been made as conventional techniques relating to the wet spraying method (for example, JP-A-5-323250, JP-A-9-304782, JP-A-9-61828, etc.). Or adhesive particles are dispersed in a low-boiling organic solvent such as ether, alcohol, or chlorofluorocarbon, and this dispersion is sprayed over the entire surface of the substrate using a spraying device such as a spray nozzle. This is a method in which the spacers are dispersed and disposed. In addition, when spraying with a spraying device, the space above the substrate is heated with a heater or the like, the dispersion liquid is sprayed into the heating space, the solvent of the dispersion liquid is volatilized in the heating space, and then the spacer is placed on the substrate. There is also a method of dispersively arranging on the surface.
[0007]
However, in the method of spraying the spacer together with the solvent as in the above wet spraying method, a large amount of spacer and solvent are required, and it takes time for the spacer suspended in the air by spray spraying to settle and adhere to the substrate surface. This increases the manufacturing cost. Further, in spray spraying, it is difficult to control the spraying amount and the spraying direction, and spraying is performed outside the area of the substrate, which is wasteful and more costly. Furthermore, in the wet spraying method, the spacer may aggregate in the dispersion due to moisture absorption or precipitation, or the spacer may re-aggregate when the dispersion sprayed on the substrate dries. This causes image defects such as luminance unevenness of the display device, coloration of the background, and poor contrast, causing display quality deterioration. In addition, since organic solvents are used, there is a problem of environmental pollution. Further, when it is desired to change the type and particle size of the spacer, it takes time to improve the environment such as cleaning when replacing the spacer type with one device, and the production efficiency is poor.
[0008]
With respect to the wet coating method, a method for improving the problems of the wet spraying method, reducing the cost and controlling the position of the spacer coating is desired, and various coating methods are considered.
For example, (1) in the method described in JP-A-7-181501, a dispersion containing a spacer is applied onto a liquid crystal substrate and dried. At that time, the wettability of the substrate with respect to the dispersion is determined by the wiring region. Accordingly, the other regions are set so as to be high, and the dispersion liquid selectively collects in the wiring region due to the magnitude relationship of the wettability, and is dried there. At this time, since the spacer is contained in the dispersion, the spacer can be provided in the region outside the wiring.
(2) In the method described in JP-A-7-181501, a black matrix containing a spacer is applied to a substrate and sintered, and thereafter unnecessary portions are removed by photolithography. This makes it possible to accurately control the position of the black matrix including the spacer.
(3) In the method described in JP-A-8-258444, a paste containing a spacer is applied to a substrate by screen printing or the like. In this method, position control on the order of microns is performed by screen printing, and printing is performed only at a desired position, so there is no contamination of the pixels.
[0009]
However, in the method (1), it takes a long time to apply and dry the dispersion, resulting in poor production efficiency, and there are problems of spacer aggregation in the dispersion and spacer aggregation during drying. The above method (2) requires a step of applying a black matrix containing a spacer to a substrate and sintering it, and then a step of removing unnecessary portions by photolithography, resulting in poor production efficiency and low manufacturing costs. There is a problem that it takes. Moreover, since it is sintered after being applied to the substrate, it can be applied only to a heat-resistant glass substrate or the like. In the method (3), spacers may aggregate in the paste to generate aggregates, and the gap between the substrates may be uneven. In addition, in any of the above (1) to (3), the spacer is arranged at a specific position of the substrate (outside of the wiring, on the black matrix, etc.), and the spacer is uniformly distributed over the entire surface of the substrate. Absent.
[0010]
[Problems to be solved by the invention]
As described above, in the conventional spacer wet spraying method, the spacer is dispersed in a low-boiling organic solvent, and this dispersion is sprayed from above the transparent substrate using a spraying device such as a spray nozzle. After spraying and precipitating over the entire surface of the substrate, the solvent is volatilized and dried.
(1) The sprayed spacer floats in the air, and it takes time to settle and dry on the substrate (about 90 seconds), resulting in poor production efficiency.
(2) Spraying with air is difficult to control the amount of spraying, and the spacer spraying area covers a wide area (although there is an enclosure), so a large amount of spacers and solvents are required. The amount that adheres to the enclosure, etc. is larger, and the spreading rate on the substrate surface is about 5%, which is very inefficient, so the production cost is high.
(3) There is a part where the spacer is aggregated without being dispersed when spraying, which causes image defects, etc.
(4) It takes time to improve the environment such as cleaning when exchanging spacer varieties (increased setup time), resulting in poor production efficiency.
Many problems have occurred.
In addition, the wet coating method also has problems such that spacer aggregation cannot be prevented, manufacturing costs are high, and applications are limited.
[0011]
The present invention has been made in view of the above circumstances, solves the problems of the prior art, increases the effective amount of spacers used, and at the same time improves productivity, and causes image defects in liquid crystal displays. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus of a liquid crystal display device using a novel dry spray method that can solve the problems such as spacer aggregation.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method of manufacturing a liquid crystal display device including a step of spraying and adhering a spacer to a substrate, and the spacer is mixed and stirred with a carrier made of particles of a magnetic material to be triboelectrically charged in opposite polarities. After that, the admixture of the spacer and the carrier is magnetically attracted and carried by the rotating admixture carrying means, and the conveyance amount regulating means arranged opposite to the admixture carrying means with a predetermined gap. The mixture is transported to the position of the bias applying means disposed opposite to the upper portion of the mixture carrying means, and the bias applying means is controlled. And a substrate carrying means between the carrier carrying means and a bias having a polarity opposite to that of the spacer from the back side of the substrate by the bias applying means. By applying the electric field (electrostatic force) formed by the application, only the spacer on the mixture carrying means is caused to fly to the substrate side, the spacer is electrostatically adsorbed to the lower surface of the substrate, and the substrate is moved by moving the substrate. It is characterized in that spacers are dispersed over the entire surface (claim 1).
[0013]
Furthermore, in the present invention, the method of mixing and charging the spacer and the carrier and the mixing ratio are determined, the spacer is dispersed on the substrate surface without agglomeration, and the condition for controlling the amount of dispersion is found to realize high efficiency. In the manufacturing method of the liquid crystal display device of the present invention,
When the spacer and the carrier are mixed and agitated and triboelectrically charged, the mixing ratio is a weight ratio, and the carrier 100 is mixed with the spacer 1 to 10 (%) (Claim 2).
The spacer has a particle size of 3 to 15 μm, and the carrier has a particle size of 100 μm or more (Claim 3).
Variably adjusting a gap between the conveyance amount regulating means and the mixture carrying means, and adjusting the conveyance amount of the mixture and the magnitude of frictional charging (claim 4);
Variably adjusting a gap between the bias applying means and the substrate to adjust a bias application range of the substrate surface (claim 5);
Variably adjusting the bias of the bias applying means to control the amount of spacers electrostatically attracted to the substrate surface (claim 6);
Variably adjusting the moving speed of the substrate and adjusting the dispersion speed of the spacers (claim 7);
After spraying spacers on the substrate, neutralizing the substrate (claim 8),
It is characterized by.
[0014]
Next, the present invention provides a liquid crystal display device manufacturing apparatus in which a spacer is dispersed and adhered to a substrate using electrostatic force by the above-described manufacturing method, and the spacer is mixed and stirred with a carrier made of magnetic material particles. A mixing and agitating means that frictionally charges to opposite polarities, a mixture carrying means that magnetically attracts and conveys the mixture of the spacer and carrier mixed and agitated by the mixing and agitating means, and a mixture carrying means A conveyance amount regulating means for regulating the conveyance amount of the mixture carried and conveyed by the mixture carrying means with a predetermined gap in the lateral direction and promoting frictional charging, and an upper portion of the mixture carrying means Bias applying means for applying a predetermined bias from the back side of the substrate arranged opposite to the substrate, and a substrate for transporting the substrate to the opposing portion of the bias applying means and the mixture carrying means It is characterized by comprising feed means (claim 9).
[0015]
Furthermore, the present invention provides a liquid crystal display manufacturing apparatus that can promote the mixed triboelectric charging of the spacer and the carrier, can be dispersed on the substrate surface without aggregating the spacer, and can control the amount of dispersion, thereby improving the efficiency. In addition, the voltage application conditions for attracting the spacer to the substrate surface with electric force are determined for each unit and for each spacer, and the spacer concentration decreases according to the usage situation, but the concentration depends on the number of manufactured products. A manufacturing apparatus capable of detecting and replenishing an additional agent is realized.
[0016]
That is, in the apparatus for manufacturing a liquid crystal display device according to the present invention, in addition to the above-described configuration, the mixture carrying means includes a rotating cylindrical sleeve and a magnet that is disposed inside the sleeve and forms a plurality of magnetic fields. It is a mixture carrying roller made of a member, and a magnetic roller in which a plurality of magnetic poles having a magnetic field of 200 to 2000 gauss is magnetized or a plurality of permanent magnets having a magnetic field of 200 to 2000 gauss is used as the magnetic member. (Claim 10),
A doctor blade is used as the transport amount regulating means, and the gap between the doctor blade and the mixture carrying means can be variably adjusted within a range of 0.2 to 2 mm. Can be changed (claim 11),
A bias application brush is used as the bias application means, and a gap between the bias application brush and the substrate can be variably adjusted within a range of 0.2 to 3 mm, and the bias application range on the substrate surface can be changed. )
The bias of the bias applying means can be variably adjusted in a range of 800 to 1500 V with a polarity (positive or negative) opposite to the charge polarity of the spacer, and the amount of the spacer that is electrostatically attracted to the substrate surface can be controlled. 13),
The moving speed of the substrate can be variably adjusted in a range of 15 to 50 mm / sec, and the spraying speed of the spacer can be changed (Claim 14).
The admixture, the admixture mixing means and the admixture carrying means are housed in a single case to form a unit, and a plurality of units are prepared corresponding to the particle diameter of the spacer used for each gap width between the substrates, The unit is configured so that it can be exchanged by a cassette method (Claim 15).
A detecting means for detecting the spacer concentration in the unit is provided, the spacer concentration in the unit is detected by the detecting means, and the spacer can be replenished according to the use situation (claim 16).
When a film substrate is used as the substrate, the film substrate is provided with a transport mechanism that transports the film substrate in a state in which the film substrate is stretched and does not sag.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The method of manufacturing a liquid crystal display device according to the present invention includes a step of spraying and adhering spacers to a substrate using electrostatic force, and a step thereof. It is characterized by the device configuration to be performed, and the process of forming an electrode wiring pattern, an alignment film, etc. on the substrate, the bonding process of the substrate after spacer dispersion, the liquid crystal sealing process, etc. are generally performed Therefore, here, the spacer spraying process and the basic configuration and operation of the apparatus for performing the process will be described.
[0018]
FIG. 1 is a diagram showing an embodiment of the present invention, and is an explanatory diagram of the basic configuration and operation of a manufacturing apparatus that performs a spacer spraying step. In order to make the operation easy to understand, the spacer 4a and the carrier 4b are exaggerated in the drawing, but actually the particles are smaller.
In the example shown in FIG. 1, the manufacturing apparatus mixes and stirs the spacer 4 a with the carrier 4 b made of magnetic material particles and frictionally charges the opposite polarity to each other, and the spacer that is mixed and stirred by the mixed stirring member 2. 4a and the carrier 4b, the mixture carrying roller 1 that magnetically attracts and carries the mixture 4 and the mixture carrying roller 1 are arranged opposite to each other with a predetermined gap in the lateral direction. A conveyance amount regulating member 3 that regulates the conveyance amount of the mixed agent 4 that is carried and conveyed and promotes frictional charging, and a predetermined bias is applied from the back side of the substrate that is disposed to face the upper part of the mixture carrying roller 1. The bias applying member 5 and substrate transporting means (not shown) for transporting the substrate 7 for the liquid crystal cell are provided at the opposing portion of the bias applying member 5 and the mixture carrying roller 1.
[0019]
In the configuration of FIG. 1, the spacer 4a is mixed and stirred with the carrier 4b made of magnetic material particles by the mixing and stirring member 2 and triboelectrically charged with opposite polarities, and then the mixture 4 of the spacer 4a and the carrier 4b is mixed. The admixture carrying roller 1 is magnetically attracted and carried by the rotating admixture carrying roller 1, and the carrying amount of the admixture 4 is made to pass through the carrying amount regulating member 3 disposed opposite to the admixture carrying roller 1 with a predetermined gap. After regulating and facilitating frictional charging, the mixture 4 is conveyed to the position of the bias applying member 5 arranged facing the upper portion of the mixture carrying roller 1 to form a magnetic brush by the carrier (FIG. 1 (b) )), The substrate 7 is carried between the bias applying member 5 and the mixture carrying roller 1 by the substrate transport means (not shown), and the bias applying member 5 is opposite to the spacer 4a from the back side of the substrate 7. The spacer 4a on the admixture-carrying roller 1 is caused to fly to the substrate 7 side by the action of an electric field (electrostatic force) formed by applying the bias, and the spacer 4a is electrostatically attracted to the lower surface of the substrate. In addition, the spacers 4a are uniformly distributed over the entire lower surface of the substrate by moving the substrate at a predetermined speed.
[0020]
Here, when the spacer 4a and the carrier 4b are mixed and stirred for triboelectric charging, the mixing ratio is a weight ratio, and the carrier 100 is mixed at the spacer 1 to 10 (%). The particle size of the spacer 4a is 3 to 15 μm (resistance is 10 ⁶ Ωcm or more) and selected according to the gap between the substrates of the liquid crystal cell. The carrier 4b is made of iron oxide such as ferrite and has a particle size of 100 μm or more and 1 mm or less. More preferably, a carrier having a particle size of 100 to 300 μm is used. As the mixing and stirring member 2, for example, a stirring roller, a stirring paddle, a stirring screw, or the like is used.
[0021]
The admixture-carrying roller 1 includes a rotating cylindrical sleeve 1a and a magnetic member 1b that is disposed inside the sleeve 1a and forms a plurality of magnetic fields. The magnetic member 1b has a magnetic field of 200 to 2000 Gauss. A plurality of magnetic poles P ₁ ~ P _Five Is used, or a plurality of permanent magnets having a magnetic field of 200 to 2000 gauss are used. Here, an example is shown in which a magnet roller is fixedly arranged coaxially with the sleeve 1a. The magnetic pole P magnetized on the magnet roller 1b ₁ ~ P _Five The number, arrangement, and distribution of magnetic flux density (magnetic field strength) are as shown in FIG. 2, for example. In this example, there are five magnetic poles and the magnetic pole P at a position substantially opposite to the bias applying member 5. ₁ Is the main pole and the main pole P ₁ Is N pole, P ₂ ~ P _Five The order is S pole, S pole, N pole, and S pole. However, the number and arrangement of magnetic poles, the distribution of magnetic flux density (magnetic field strength) and the like are not limited to this, and the arrangement of the apparatus, the type of spacer and carrier, the mixing ratio, the arrangement position of the conveyance amount regulating member 3 and the bias applying member 5 It is set according to the above.
[0022]
Further, in FIG. 1, for example, a doctor blade is used as the conveyance amount regulating member 3, and the conveyance amount of the mixture 4 and the magnitude of the frictional charge are adjusted by variably adjusting the gap between the doctor blade and the mixture carrying roller 1. Can be adjusted.
Further, as the bias applying member 5, for example, a medium resistance (10 ⁷ -10 ⁸ (Ω · cm) bias application brush or the like is used and is connected to the power source 6. By adjusting the gap between the bias application brush 5 and the substrate 7, the bias application range on the substrate surface can be adjusted. . This is because the electric field formed by the bias applying brush 5 spreads toward the mixture carrying roller 1 side because the mixture carrying roller 1 side is grounded. The amount of the spacer that is electrostatically attracted to the substrate surface can be controlled by variably adjusting the bias voltage applied to the bias application brush 5 by the power source 6.
[0023]
As a conveying means for the substrate 7, there is a method using a conveying roller, a conveying belt, or the like. In any case, a roller, a belt, etc. In general, a system is used in which the outside of the wiring pattern area and the outside of the spacer scattering area at both ends of the substrate 7 are supported and conveyed by a conveyance roller, a conveyance belt, or the like. Moreover, the dispersion | spreading speed of a spacer can be adjusted by variably adjusting the moving speed of the board | substrate 7. FIG.
[0024]
In addition, when supporting and conveying only both ends of a substrate by a conveyance roller or a conveyance belt, when the substrate is a substrate that can maintain flatness like a glass substrate, a horizontal conveyance method as shown in FIG. 1 may be used. In the case of a resin film substrate, if both ends are supported and transported in the horizontal direction, the center of the film substrate is likely to be bent or loosened, which causes unevenness during spacer dispersion. Therefore, when a film substrate is used, it is necessary to devise a conveyance method so that the film substrate is stretched and conveyed in a state in which no slack occurs.
Therefore, in the present invention, when a film substrate is used, as shown in the embodiment of FIG. 3, the apparatus has a transport mechanism that can transport the film substrate in a state in which the film substrate is stretched and no slack is generated. Yes. The configuration of FIG. 3 will be described later.
[0025]
Next, the spacer spraying method according to the present invention will be described in more detail with reference to FIG. The spacer spraying method according to the present invention is composed of (1) mixed frictional charging, (2) dispersion, (3) transfer, and (4) substrate conveyance, and will be described in the following order.
[0026]
(1) Mixed frictional charging.
As described above, the mixing and stirring of the spacer 4a and the carrier 4b is performed by the mixing and stirring member 2 including a stirring roller, a stirring paddle, a stirring screw, or the like. As a result, the spacer 4a and the carrier 4b are frictionally charged with opposite polarities, The spacer 4a is electrostatically attached to the surface of the carrier 4a having a large particle size. Then, the frictionally charged spacer / carrier mixture 4 is applied to the magnetic pole P of the magnet roller 1 b of the mixture carrying roller 1. _Four Is held on the outer peripheral surface of the sleeve 1a by the magnetic force, and is carried and conveyed by the rotation of the sleeve 1a. At this time, the sleeve 1a rotates, but the magnet roller 1b is fixed. _Four (N pole) to P _Five The carrier rotates on the sleeve 1a by the action of the magnetic field directed in the (S pole) direction, and the spacer and the carrier are mixed to promote frictional charging. The admixture 4 carried on the admixture carrying roller 1 passes through the gap with the doctor blade 3 by the rotation of the sleeve 1a and the conveyance amount is regulated. The frictional charging is further promoted by stirring. P _Five (S pole) to P ₁ P in the process of being transported to (N pole) _Five (S pole) -P ₁ The spacer and carrier are mixed on the sleeve 1a by the action of the magnetic field between the (N poles), and the charged state is maintained well.
[0027]
(2) Dispersion.
As described above, the carrier 4b and the spacer 4a are mixed and stirred and mixed to generate static electricity, thereby charging the carrier and the spacer, separating the aggregation of the spacers, and dispersing them in the individual independent spacers. At this time, the potentials of the carrier and the spacer due to frictional charging are opposite in polarity. For example, when the carrier has a negative (−) potential, the spacer has a positive (+) potential. As a result, an electrostatic attractive force is generated between the carrier and the spacer, and the spacer is dispersed and adhered to the surface of the carrier. On the other hand, the repulsive force works and repels because the spacers have the same polarity (+) potential. As a result, spacer aggregation is prevented. Further, since frictional charging is promoted also when being carried and conveyed by the mixture carrying roller 1 or when passing through the gap of the doctor blade 3, the mixture carrying is carried to the position facing the bias application brush 5 by the mixture carrying roller 1. The charged state of the spacer 4a and the carrier 4b thus maintained is kept good, and as a result, as shown in FIG. ₁ When the magnetic brush is formed by the magnetic force of), the spacer 4a is appropriately dispersed and adsorbed on the surface of the carrier 4b, and the aggregation of the spacer is reliably prevented. The spacer includes a glass material and a resin material. Here, as an example, a spacer made of a resin material having a particle size of 10 μm is used, and an iron oxide having a particle size of 100 to 300 μm is used as a carrier. The mixing ratio of the carrier and the spacer was 100: 1 to 8% by weight, but the optimum mixing ratio was when the spacer was 3%. Further, due to the mixed triboelectric charge, the resin spacer becomes a (+) potential and the carrier becomes a (−) potential.
[0028]
(3) Transcription.
A substrate 7 is transported by a transport means (not shown) to the position where the mixture carrying roller 1 and the bias application brush 5 are opposed to each other. When the transported substrate 7 reaches a predetermined position, the power supply 6 is turned on, and the substrate is turned on. A predetermined bias is applied by the bias applying brush 5 from the back surface side (here, since the spacer is a (+) potential, a voltage of (-) polarity is applied to the bias applying brush and is variable in a range of -800V to -1500V. Adjusted). When a bias voltage of (−) potential is applied to the bias application brush 5, the magnetic field is generated by the action of an electric field (electrostatic force) formed between the bias application brush 5 and the mixture carrying roller 1 (ground potential). The spacer 4a attached to the brush carrier 4b is attracted to the bias applying brush 5 side, flies upward, and is electrostatically attracted to the lower surface of the substrate 7. At this time, since the spacers have the same polarity at the (+) potential, they are transferred without aggregating even on the substrate surface. FIG. 5 shows the relationship between the bias voltage applied to the bias application brush 5 and the spacer adhesion amount.
[0029]
(4) Transport.
As described above, by applying a bias to the bias application brush 5, the spacer 4a is electrostatically attracted to the lower surface of the substrate 7. At this time, the substrate 7 is moved to a predetermined conveyance speed (for example, 15 to 50 mm / mm) by the conveyance means. The spacer 4a can be uniformly distributed over the entire bottom surface of the substrate. Note that the spacer 4a attached to the lower surface of the substrate by the transport of the substrate 7 is also transported with the substrate 7 and goes out of the bias application region, but the spacer is dropped from the substrate surface because the electrostatic adsorption of the spacer is maintained. There is no.
[0030]
In the spacer spraying method of the present invention, a bias having the same polarity as the carrier and opposite to the spacer is applied to the bias applying brush 5, and only the spacer 4a is caused to fly upward by electrostatic force to electrostatically apply to the lower surface side of the substrate 7. Since it is configured to adsorb, the carrier 4b does not adhere to the substrate 7 when a bias is applied. Furthermore, in the present invention, since the substrate moves above the mixture carrying roller 1, even if the magnetic brush contacts the substrate before the bias is applied, the carrier is heavier than the spacer, and the carrier carrying roller 1 Since it is held by magnetic force, the carrier does not adhere to the substrate due to the action of gravity and magnetic force.
The mixture (almost carrier) that has passed through the position facing the bias application brush 5 is P. ₂ Pole (S pole) and P _Three It falls from the mixture carrying roller 1 between the poles (S poles) and is mixed again by the mixing stirring member 2.
[0031]
The substrate 7 on which the spacer has been dispersed is transported to a predetermined place such as a completion stage by the transport means, and the spraying process is completed. At this time, a neutralization device is provided in the middle of the transport path, and a bias is applied in the final process. It is preferable that the charged substrate 7 is sometimes discharged. This is because foreign substances such as dust may adhere to the substrate surface if the substrate is left charged. Incidentally, even if the substrate is neutralized, the fine particle spacer remains charged, so that the electrostatic adsorption state is maintained by the mirror image effect, and the spacer does not fall from the substrate surface, and the spacer dispersion arrangement is not disturbed.
[0032]
The spacer spraying process and the basic configuration and operation of the apparatus for performing the spacer have been described above. However, in the method and apparatus configuration of the present invention, the spacers are uniformly sprayed on the substrate surface without agglomeration, so a large-area substrate is obtained. Even when the spacers are dispersed on the surface, it is possible to prevent the occurrence of image defects due to the aggregation of the spacers. In addition, since the amount of spacer sprayed can be controlled and can be sprayed without waste, the production efficiency can be greatly improved as compared with the conventional wet spraying method. Furthermore, according to the method of the present invention, the spacers can be continuously spread over a large number of substrates by devising the conveying means, and the productivity can be improved.
[0033]
Next, FIG. 3 shows a specific embodiment of the manufacturing apparatus according to the present invention. FIG. 3 is a diagram showing a schematic configuration of a manufacturing apparatus used in a step of spraying spacers on a film substrate for a liquid crystal display device, and this manufacturing apparatus 9 has a tension on the film substrate so that no slack is generated. It has a configuration equipped with a transport mechanism that can be transported in a state, and spacers can be evenly dispersed and distributed on the substrate surface even on the film substrate.
[0034]
In FIG. 3, reference numeral 10 denotes a mixture unit, and this mixture unit 10 has a configuration as shown in FIG. 4. In the case, there is a mixture carrying roller 1, a stirring roller 2 that is a mixing stirring member, a doctor. A blade 3 is provided. Although not shown, a mixture of a spacer and a carrier is accommodated around the stirring roller 2. A concentration detection sensor 31 for detecting the spacer concentration in the unit is provided at the lower part of the mixture unit 10, and the spacer concentration in the unit is detected by the concentration detection sensor, and the spacer is replenished according to the use situation. Can be done. Further, the mixture unit 10 is detachably installed on the support portion 30 of the apparatus main body, and can be easily removed by pulling out the unit in the axial direction of the roller. Therefore, if a plurality of admixture units are prepared corresponding to the particle size of the spacer used for each gap width (gap width) between the liquid crystal substrates and the type of spacer, the desired gap width and type can be obtained. One-touch exchange can be performed in a cassette system for a mixture unit containing a corresponding spacer.
[0035]
The configuration of the mixture-carrying roller 1 in the mixture unit 10 is the same as that shown in FIG. 1, and is composed of a rotating cylindrical sleeve 1a and a magnet roller 1b that is arranged inside the sleeve 1a and forms a plurality of magnetic fields. ing. The magnetic pole P magnetized on the magnet roller 1b ₁ ~ P _Five For example, the number and arrangement of magnetic fluxes and the distribution of magnetic flux density (magnetic field strength) are as shown in FIG. Accordingly, the operation and action of the mixture-carrying roller 1 are as described with reference to FIGS. 1 and 2, and the mixture of the spacer and carrier mixed and agitated by the agitation roller 2 and frictionally charged is carried by a magnetic force. The mixture can be conveyed to a position facing the bias applying brush 5 while further promoting triboelectric charging to form a magnetic brush, and spacers can be dispersed.
The doctor blade 3 is disposed opposite to the mixture carrying roller 1 with a predetermined gap in the lateral direction and is fixed to the mixture unit 10, but the gap between the doctor blade 3 and the mixture carrying roller 1 is 0. .Variable adjustment is possible within the range of 2 to 2 mm, and the conveyance amount of the mixed agent and the magnitude of the triboelectric charge can be changed.
[0036]
The bias application brush 5 as a bias application means is disposed at a position facing the oblique upper portion of the mixture carrying roller 1 and is fixed to the shaft 32. The bias application brush 5 includes a brush portion 5a and the brush portion 5a. The brush portion 5a can be moved in the axial direction with respect to the support portion 5b, and the gap with the substrate can be variably adjusted within a range of 0.2 to 3 mm. Therefore, the bias application range on the substrate surface can be changed. Although not shown, the brush portion of the bias application brush 5 is connected to a high-voltage power supply via a wiring so that a bias voltage is applied. The bias voltage has a polarity opposite to the charging polarity of the spacer ( (Positive or negative) can be variably adjusted in the range of 800 to 1500 V, and the amount of spacers electrostatically adsorbed on the substrate surface can be controlled.
[0037]
As described above, the configurations of the mixture carrying roller 1, the mixing and stirring member 2, and the doctor blade 3 in the mixture unit 10 are the same as those in FIG. 1, and the arrangement and configuration of the bias application brush 5 are also illustrated. 1, the film substrate 12 is conveyed to a position opposite to the mixture carrying roller 1 and the bias application brush 5 by a conveyance mechanism described later, so that the spacers are uniformly distributed on the film substrate 12 by the spacer spraying method described above. Can be sprayed.
[0038]
Next, the film substrate transport mechanism will be described. In FIG. 3, reference numeral 11 denotes a transport belt in the film substrate set area. The transport belt 11 is stretched around rollers or pulleys of belt support portions 19 and 20, and the film substrate 12 placed on the belt is placed on the transport belt 11. It is conveyed in the direction of the arrow in the figure.
Reference numeral 13 denotes a pair of conveying belts that carry both ends of the film substrate 12 and convey the mixed substrate 1 toward the opposing position (spacer spraying portion) of the mixture carrying roller 1 and the bias application brush 5. Two conveying belts are arranged side by side with a predetermined interval (interval corresponding to the width of the film substrate) in a direction perpendicular to the paper surface. The pulleys of the belt support portions 17 and 19 and the belt support portion 18 respectively. It is stretched around the tension pulley. And the part constructed between the pulleys of the belt support portions 17 and 19 of the pair of conveying belts 13 is in sliding contact with the pair of arcuate guide members 14, and supports both ends of the film substrate 12 between the guide members 14. Then, the film substrate 12 is conveyed along the arc surface of the guide member 14. At this time, since the conveyance belt 13 and the guide member 14 are configured not to contact the substrate surface other than both end portions of the film substrate 12, the substrate surface and the wiring pattern are not damaged.
[0039]
A plurality of pulleys or rollers are coaxially fixed to the belt support portions 17 and 19 on which the transport belt 13 is hung, so that a plurality of belts can be hung. One end of the driving belt 16 is hung on another pulley of the belt support portion 17, and the other end side of the driving belt 16 is hung on a driving pulley 15 fixed to a driving shaft of a motor (not shown). ing. Therefore, when the driving pulley 15 is rotated in the direction of the arrow in the figure by the motor, the pulley of the belt support portion 17 is rotated via the driving belt 16, and the pair of conveying belts 13 is rotated so that the film substrate 12 is rotated. Be transported.
[0040]
A pair of circular substrate supports 21 are rotatably supported via bearings at positions corresponding to both ends of the film substrate 12 on both ends of the shaft 32 to which the bias applying brush 5 is fixed. The upper part of the guide member 14 is in sliding contact with the outer peripheral surfaces of the pair of substrate supports 21. A fixing means (not shown) is provided between the pair of substrate supports 21 for fixing the leading end of the film substrate at a position corresponding to the outer peripheral surface of the substrate support 21. As this fixing means, there are, for example, a mechanism that sucks and fixes the front end portion of the film substrate 12 using air suction force, a clamp mechanism that squeezes the front end portion of the film substrate 12, and the like.
[0041]
Reference numeral 22 denotes a pair of transport belts disposed at positions corresponding to both ends of the film substrate and transporting the film substrate 12 in cooperation with the substrate support 21 (the film substrate in a direction perpendicular to the paper surface). The pair of transport belts 22 are stretched over the pulleys of the belt support portions 25 and 27 and the tension pulley of the belt support portion 26. The portions of the belt support portions 25 and 27 that are installed between the pulleys are in contact with the outer peripheral surface of the substrate support 21. Further, another pulley of the belt support portion 25 is hung on one end side of the driving belt 24, and the other end side of the driving belt 24 is connected to a driving pulley 23 fixed to a driving shaft of a motor (not shown). It is hung. Therefore, when the driving pulley 23 is rotated in the direction of the arrow in the figure by the motor, the pulley of the belt support portion 25 is rotated via the driving belt 24, and the pair of transport belts 22 is rotated to support the pair of substrates. The body 21 is rotated.
[0042]
The pair of transport belts 22 and the substrate support 21 are driven in accordance with the timing when the leading end of the film substrate 12 is transported by the transport belt 13 in the previous stage, and the leading end of the film substrate 12 is fixed to the fixing means (not shown). At the same time, the pair of transport belts 22 and the substrate support 21 are started to rotate. Then, the film substrate 12 on which the spacers are dispersed is conveyed toward the completion stage 29 in a form in which both ends of the film substrate 12 are held between the conveyance belt 22 and the substrate support 21. At this time, since the conveyance belt 22 and the substrate support member 21 do not come into contact with portions other than both ends of the film substrate 12, the dispersed arrangement of the spacers scattered on the substrate surface is disturbed, or the substrate surface and the wiring pattern are damaged. There is nothing.
[0043]
3, the film substrate 12 is transported along the arc surface of the guide member 14 by driving the transport belt 13 in the previous stage, and is directed to the outer peripheral surface of the substrate support 21 from the front of the spacer spraying region. And is conveyed to the completion stage 29 by the conveyor belt 22. Accordingly, the film substrate 12 is transported with the S-shaped transport path facing upward, and is transported in a slightly curved state with both ends supported by the substrate support 21 before and after the spacer spraying portion. When transported in such a slightly curved state, the substrate surface can be stretched by the elastic action of the film substrate itself, and even in a method of transporting while supporting only both ends of the film substrate, it passes through the spacer spraying portion. Occurrence of slack or the like on the substrate surface is prevented. Therefore, the substrate surface is kept parallel to the bias application brush 5 and the mixture carrying roller 1, and the occurrence of unevenness when the spacers are dispersed is prevented.
[0044]
In the manufacturing apparatus of FIG. 3, a static elimination box 28 is disposed in front of the completion stage 29 so that the static electricity can be removed from the film substrate 12 after the spacers are dispersed.
In addition, the transport mechanism of the manufacturing apparatus shown in FIG. 3 is configured so that the transport speed of the film substrate 12 can be variably adjusted in the range of 15 to 50 mm / sec, and the spacer spraying speed can be changed.
[0045]
【The invention's effect】
As described above, in the method of manufacturing a liquid crystal display device according to the present invention, in the step of spraying the spacers on the substrate for the liquid crystal display device, the spacers are mixed and agitated with the carrier made of magnetic material particles and rubbed in opposite polarities After charging, the admixture of the spacer and the carrier is magnetically attracted and carried by the rotating admixture carrying means, and the conveyance amount regulation is arranged opposite to the admixture carrying means with a predetermined gap. After passing the means to regulate the transport amount of the mixture and promoting triboelectric charging, the mixture is transported to the position of the bias applying means disposed facing the upper portion of the mixture carrying means, and the bias application The substrate is carried by the substrate carrying means between the means and the mixture carrying means, and a bias having a polarity opposite to that of the spacer is applied from the back side of the substrate by the bias applying means. By applying the electric field (electrostatic force) formed by the application, only the spacer on the mixture carrying means is caused to fly to the substrate side, the spacer is electrostatically adsorbed to the lower surface of the substrate, and the substrate is moved by moving the substrate. Since spacers are scattered over the entire surface (Claim 1), the frictionally charged spacers can be transferred (sprayed) to the substrate surface with the required width and amount, which is higher than conventional wet spraying methods. Spacer spraying can be performed efficiently, the effective use amount of the spacer can be increased, and at the same time, the productivity can be improved, and the manufacturing cost (spacer use amount, manufacturing time, etc.) can be greatly reduced. For example, the wet spraying method requires 90 milligrams of spacers to spray 4 milligrams of spacers on a single substrate, and the spraying time takes about 90 seconds. When there is no useless spraying and the spraying amount is 4 milligrams ± 2 milligrams, the spraying time is about 5 to 10 seconds.
[0046]
Furthermore, in the manufacturing method of the liquid crystal display device of the present invention, when the spacer and the carrier are mixed and stirred to be triboelectrically charged, the mixing ratio is a weight ratio, and the carrier 100 is mixed with the spacer 1 to 10 (%). (Claim 2) Therefore, the spacer can be charged with the opposite polarity to the carrier, and the aggregation of the spacer can be surely prevented. Accordingly, it is possible to solve problems such as spacer aggregation that cause image defects in the liquid crystal display. In addition, since the spacer has a particle size of 3 to 15 μm and the carrier has a particle size of 100 μm or more (Claim 3), the carrier at the position facing the substrate is loaded with the mixture by the magnetic force and gravity of the mixture carrying means. The carrier is reliably prevented from adhering to the substrate side when it is restrained on the means side and a bias is applied to cause the spacer to fly from the admixture carrying means to the substrate side and is dispersed.
[0047]
In the method of manufacturing a liquid crystal display device according to the present invention, the gap between the transport amount regulating means and the mixture carrying means is variably adjusted, and the transport amount of the mixture and the magnitude of triboelectric charge are adjusted. 4) The conveyance amount of the mixed agent and the triboelectric charge are always in a stable state, variation within the process is suppressed, and stable production can be performed. In addition, since the gap between the bias applying means and the substrate is variably adjusted to adjust the bias application range on the substrate surface (Claim 5), the transfer width of the spacer can be controlled. Further, since the bias of the bias applying means is variably adjusted to control the amount of spacers that are electrostatically attracted to the substrate surface (Claim 6), it is possible to disperse and arrange the optimum amount of spacers on the substrate surface. Furthermore, since the moving speed of the substrate is variably adjusted and the spraying speed of the spacer is adjusted (Claim 7), the spacers can be distributed and arranged on the substrate surface with an optimum dispersion density. Further, by discharging the substrate after spraying the spacers (claim 8), it is possible to prevent foreign substances such as dust from adhering to the substrate surface due to the charging of the substrate.
[0048]
Next, in the apparatus for manufacturing a liquid crystal display device of the present invention, a mixing stirrer that mixes and stirs a spacer with a carrier made of particles of magnetic material and frictionally charges them in opposite polarities; A mixture carrying means for magnetically attracting and carrying the carrier mixture and a mixture carried and carried by the mixture carrying means in the lateral direction of the mixture carrying means with a predetermined gap. A conveyance amount regulating means for regulating the conveyance amount of the substrate and facilitating frictional charging; a bias applying means arranged opposite to the upper part of the mixture carrying means; and applying a predetermined bias from the back side of the substrate; 9. A substrate transfer means for transferring the substrate to the opposite portion of the means and the admixture carrying means, and the spacer is formed by utilizing electrostatic force by the manufacturing method according to claim 1. (Claim 9), the triboelectrically charged spacer can be transferred (sprayed) to the substrate surface with the required width and amount, compared to a device using a conventional wet spraying method. Spacer spraying can be performed with high efficiency, and the effective use amount of the spacer can be increased, and at the same time the productivity can be improved, and the manufacturing cost (spacer use amount, manufacturing time, etc.) can be greatly reduced.
[0049]
Further, in the liquid crystal display device manufacturing apparatus of the present invention, in addition to the above-described configuration, the mixture carrying means includes a rotating cylindrical sleeve and a magnet that is disposed inside the sleeve and forms a plurality of magnetic fields. This is a mixture-bearing roller made of a member, and a magnetic roller having a plurality of magnetic poles having a magnetic field of 200 to 2000 gauss or a plurality of permanent magnets having a magnetic field of 200 to 2000 gauss is used as the magnetic member. (Claim 10) The carrier and spacer mixture can be carried by a magnetic force and conveyed to a position facing the upper substrate, and the mixture is agitated by the action of the magnetic field between the magnetic poles during the conveyance. Therefore, triboelectric charging can be promoted, and aggregation of spacers can be reliably prevented. Moreover, since the carrier is restrained by the magnetic force, the carrier can be prevented from adhering to the substrate.
[0050]
Furthermore, in the liquid crystal display manufacturing apparatus of the present invention, a doctor blade is used as the transport amount regulating means, and the gap between the doctor blade and the mixture carrying means can be variably adjusted within a range of 0.2 to 2 mm. Yes, since the amount of the mixed agent transported and the magnitude of the triboelectric charge can be changed (Claim 11), the amount of the mixed agent transported and the triboelectric charge are always in a stable state, and variations in the process are suppressed, and the stable Manufacturing can be performed. Further, a bias application brush is used as the bias application means, and the gap between the bias application brush and the substrate can be variably adjusted within a range of 0.2 to 3 mm, and the bias application range on the substrate surface can be changed (invoice). Item 12), the transfer width of the spacer can be controlled. In addition, the bias of the bias applying means can be variably adjusted in the range of 800 to 1500 V with the polarity opposite to the charge polarity of the spacer (positive or negative), and the amount of the spacer that is electrostatically attracted to the substrate surface can be controlled. (Claim 13) An optimal amount of spacers can be dispersed and arranged on the substrate surface. Furthermore, since the moving speed of the substrate can be variably adjusted in the range of 15 to 50 mm / sec and the spraying speed of the spacer can be changed (Claim 14), the spacers are dispersedly arranged on the substrate surface with an optimum dispersion density. be able to.
[0051]
Furthermore, in the liquid crystal display manufacturing apparatus of the present invention, the mixture, the mixture stirring means and the mixture carrying means are housed in a single case to form a unit, and spacers used for each gap width between the substrates. A plurality of units are prepared according to the particle size, and the unit can be exchanged with the cassette method by one-touch (Claim 15), so that the desired unit can be easily selected according to the type of spacer and particle size to be used. And can improve production efficiency. Further, since a detecting means for detecting the spacer concentration in the unit is provided, the spacer concentration in the unit is detected by the detecting means, and the spacer can be replenished according to the use situation (Claim 16). Mistakes such as shortage can be prevented. Furthermore, in the case where a film substrate is used as the substrate, the film substrate is provided with a conveying mechanism that conveys the film substrate in a state in which the film substrate is stretched and does not sag (Claim 17). , The spacers can be evenly and evenly distributed.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an embodiment of the present invention, and is an explanatory diagram of a basic configuration and operation of a manufacturing apparatus that performs a spacer spraying step.
FIG. 2 shows a magnetic pole P magnetized on a magnet roller in a mixture carrying roller. ₁ ~ P _Five It is a figure which shows arrangement | positioning and magnetic flux density (magnetic field strength) distribution.
FIG. 3 is a diagram illustrating an embodiment of the present invention, and is a schematic configuration diagram of a manufacturing apparatus used in a step of spraying spacers on a film substrate.
4 is a cross-sectional view showing a configuration of a mixture unit of the production apparatus shown in FIG.
FIG. 5 is a diagram illustrating a relationship between a bias voltage and a spacer adhesion amount.
FIG. 6 is a diagram illustrating an example of a liquid crystal display device, and is a partial cross-sectional view of a liquid crystal cell.
[Explanation of symbols]
1: Admixture carrying roller (mixture carrying means)
1a: Sleeve
1b: Magnet roller (magnetic member)
2: Mixing stirring member (mixing stirring means)
3: Doctor blade (conveyance amount regulating member)
4: Mixing agent
4a: Spacer
4b: Career
5: Bias application brush (bias application means)
6: Power supply for bias application
7: Substrate for liquid crystal display device
9: Manufacturing equipment
10: Mixture unit
11: Conveyor belt (film substrate set area)
12: Film substrate
13: A pair of transport belts
14: A pair of guide members
15, 23: Drive pulley
16, 24: Driving belt
17, 18, 19, 20, 25, 26, 27: belt support portion
21: A pair of substrate supports
22: A pair of conveyor belts
28: Static elimination box
29: Completion stage
P ₁ ~ P _Five : Magnetic pole

Claims (17)

A liquid crystal having a uniform gap between a pair of substrates for a liquid crystal display device, in which a liquid crystal layer is sealed in the gap between the substrates, and spacers made of fine particles are scattered between the substrates to hold the gap A method for manufacturing a display device, wherein the spacer has a step of spreading and adhering the spacer to a substrate.
The spacer is mixed and stirred with a carrier made of magnetic material particles and triboelectrically charged in opposite polarities, and then the spacer and carrier mixture is magnetically attracted and carried by a rotating mixture carrying means. Then, after passing through a transport amount regulating means arranged opposite to the mixture carrying means with a predetermined gap to regulate the carry amount of the mixture and promoting frictional charging, it faces the upper part of the mixture carrying means The mixture is transported to the position of the bias applying means arranged as described above, the substrate is transported by the substrate transport means between the bias applying means and the mixture carrying means, and the spacer is applied from the back side of the substrate by the bias applying means. A reverse polarity bias is applied, and only the spacer on the mixture carrying means is caused to fly to the substrate side by the action of an electric field (electrostatic force) formed by the application of the bias. Method of manufacturing a liquid crystal display device, characterized in that with electrostatically adsorbed on the substrate lower surface, is sprayed spacers on the entire surface of the substrate lower surface by moving the substrate. In the manufacturing method of the liquid crystal display device according to claim 1, when the spacer and the carrier are mixed and agitated and triboelectrically charged, the mixing ratio is a weight ratio,
Carrier 100: Spacer 1-10 (%)
A method of manufacturing a liquid crystal display device, comprising mixing in a step. 3. The method of manufacturing a liquid crystal display device according to claim 1, wherein the spacer has a particle size of 3 to 15 [mu] m, and the carrier has a particle size of 100 [mu] m or more. 4. The method of manufacturing a liquid crystal display device according to claim 1, wherein the gap between the conveyance amount regulating means and the mixture carrying means is variably adjusted to adjust the conveyance amount of the mixture and the magnitude of frictional charging. A method for manufacturing a liquid crystal display device. 5. The method of manufacturing a liquid crystal display device according to claim 1, wherein a gap between the bias applying means and the substrate is variably adjusted to adjust a bias application range of the substrate surface. Manufacturing method. 6. The method of manufacturing a liquid crystal display device according to claim 1, wherein the bias of the bias applying means is variably adjusted to control the amount of spacers electrostatically attracted to the substrate surface. A method for manufacturing a liquid crystal display device. 7. The method of manufacturing a liquid crystal display device according to claim 1, wherein the moving speed of the substrate is variably adjusted and the spraying speed of the spacer is adjusted. Method. 8. The method of manufacturing a liquid crystal display device according to claim 1, wherein the substrate is discharged after a spacer is dispersed on the substrate. . An apparatus for manufacturing a liquid crystal display device according to any one of claims 1 to 8, wherein a step of dispersing and adhering a spacer to a substrate using electrostatic force is performed.
Mixing and stirring means for mixing and stirring the spacer with a carrier made of magnetic material particles and frictionally charging in opposite polarities, and the carrier and carrier mixture mixed and stirred by the mixing and stirring means are magnetically attracted and carried. The admixture-carrying means that controls the amount of the admixture carried and conveyed by the admixture-carrying means, with a predetermined gap in the lateral direction of the admixture-carrying means, and to promote frictional charging A quantity regulating unit, a bias applying unit arranged to be opposed to the upper part of the mixture carrying unit and applying a predetermined bias from the back side of the substrate, and the substrate is transported to the opposed part of the bias applying unit and the mixture carrying unit An apparatus for manufacturing a liquid crystal display device, comprising: a substrate transfer means for performing the above operation. 10. The apparatus for manufacturing a liquid crystal display device according to claim 9, wherein the mixture carrying means includes a rotating cylindrical sleeve and a mixture carrying roller that is disposed inside the sleeve and includes a magnetic member that forms a plurality of magnetic fields. The magnetic member is a magnet roller having a plurality of magnetic poles having a magnetic field of 200 to 2000 gauss, or a plurality of permanent magnets having a magnetic field of 200 to 2000 gauss. Manufacturing equipment. 11. The apparatus for manufacturing a liquid crystal display device according to claim 9, wherein a doctor blade is used as the transport amount regulating means, and a gap between the doctor blade and the mixture carrying means can be variably adjusted within a range of 0.2 to 2 mm. An apparatus for manufacturing a liquid crystal display device, wherein the transport amount of the mixed agent and the magnitude of triboelectric charge can be changed. 12. A manufacturing apparatus of a liquid crystal display device according to claim 9, wherein a bias applying brush is used as the bias applying means, and a gap between the bias applying brush and the substrate can be variably adjusted within a range of 0.2 to 3 mm. An apparatus for manufacturing a liquid crystal display device, wherein the bias application range of the substrate surface can be changed. 13. The apparatus for manufacturing a liquid crystal display device according to claim 9, 10, 11 or 12, wherein the bias of the bias applying means can be variably adjusted in a range of 800 to 1500 V with a polarity opposite to the charging polarity of the spacer (positive or negative). An apparatus for manufacturing a liquid crystal display device, wherein the amount of spacers electrostatically adsorbed to the substrate surface can be controlled. 14. The apparatus for manufacturing a liquid crystal display device according to claim 9, 10, 11, 12, or 13, wherein the moving speed of the substrate can be variably adjusted in a range of 15 to 50 mm / sec, and the spraying speed of the spacer can be changed. An apparatus for manufacturing a liquid crystal display device. 15. The apparatus for manufacturing a liquid crystal display device according to claim 9, 10, 11, 12, 13, or 14, wherein the mixture, the mixture stirring means and the mixture carrying means are housed in a single case to form a unit between the substrates. An apparatus for manufacturing a liquid crystal display device, wherein a plurality of units are prepared corresponding to the particle size of the spacer used for each gap width, and the units can be exchanged one-touch by a cassette method. 16. The apparatus for manufacturing a liquid crystal display device according to claim 15, wherein a detecting means for detecting a spacer concentration in the unit is provided, the spacer concentration in the unit is detected by the detecting means, and the spacer can be replenished according to the use situation. An apparatus for manufacturing a liquid crystal display device. 17. A liquid crystal display device manufacturing apparatus according to claim 9, wherein when a film substrate is used as the substrate, the film substrate is stretched so that the film substrate is transported in a state in which no slack occurs. An apparatus for manufacturing a liquid crystal display device, comprising:

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