JPH08101364A - Production of liquid crystal panel and apparatus for producing the same - Google Patents

Abstract

PURPOSE: To improve productivity by obviating mispositioning of the oriented film forming area of a glass substrate surface with respect to a glass substrate. CONSTITUTION: This process is constituted by including a stage for detecting the mispositioning of a positioning mark 122a and positioning mark 411a formed in the position corresponding to the positioning mark 411a of the substrate at the moment the positioning mark 411a during the stage of rotating a plate cylinder 243 having a letterpress part 243a for printing an oriented film soln. and the positioning mark 411a near the outer side thereof in the state of bringing this plate cylinder into contact with the substrate on a printing stage 412 and printing the surface of the substrate moving cooperatively with rotation of the plate cylinder 243 with the oriented film soln. 123' applied on the letterpress part 243a faces the substrate or comes into contact therewith into a stage for printing the substrate existing on the printing stage 412 in the positioned state with the oriented film soln. 123' by a letterpress printing technique.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method and a manufacturing apparatus for a liquid crystal panel, and more particularly to a manufacturing method and a manufacturing apparatus for a liquid crystal panel which eliminates misalignment of an alignment film forming region with respect to a substrate to improve productivity.

In the field of personal computers, word processors, etc., conventional cathode ray tubes (CR) are used as information display means.
T) As an alternative to the display, a liquid crystal display device that can realize thinness, lightness, and low power consumption has been widely used.

In a liquid crystal panel constituting such a liquid crystal display device, an STN (Supe) is formed by forming a simple electrode line matrix with two transparent substrates and then enclosing a liquid crystal body.
r Twist Nematic) Between a liquid crystal panel and another substrate, for example, after patterning an electrode line matrix that does not short-circuit each intersection on one substrate and a thin film transistor connected to the X and Y electrode lines near each intersection. A TFT (Thin Film Transistor) liquid crystal panel which is configured by enclosing a liquid crystal body in the above has been put into practical use.

[0004]

2. Description of the Related Art FIG. 5 as a technical background is a diagram for schematically explaining a basic configuration example of a liquid crystal panel.
FIG. 6 is a diagram illustrating a conventional method of printing an alignment film solution together with the apparatus.

In a partially enlarged cross-sectional view of FIG. 5, a liquid crystal panel 1 has a first substrate 12 in which a first polarizing plate 11 is attached to a surface of a backlight L ₁ side and a surface of a transmitted light L ₂ side. That is, the second substrate 1 having the second polarizing plate 15 attached to the operator observation side surface
6 and a liquid crystal body 13 enclosed between the first and second substrates 12 and 16.

The first substrate 12 is a transparent glass substrate.
After forming a plurality of transparent electrodes 122 having the arrow A as the longitudinal direction in parallel on one inner surface (upper surface in the figure) of 121, a first alignment film 123 made of a polyimide resin for aligning liquid crystal molecules is formed on each of the transparent electrodes 122. The glass substrate 12 so as to cover the transparent electrode 122.
1 is formed by coating on a predetermined area.

The second substrate 16 is a transparent glass substrate 161.
A black mask 16 made of chrome (Cr) or the like having an opening window 162a at a predetermined position described later on one inner surface (lower surface in the figure) of the
2 and a color filter 163 formed in the area of the opening window 162a thereof, and a black mask including the color filter 163.
After the entire surface of 162 is covered with a top coat 164 as a protective film, a plurality of transparent electrodes 165 with the arrow B in the longitudinal direction are formed in parallel on the surface (lower surface in the figure) of the top coat 164, and liquid crystal molecular alignment is performed. A second alignment film 166 made of a polyimide resin for adjusting the above is formed by coating the predetermined region of the glass substrate 161 by the above method so as to cover each transparent electrode 165.

In this case, each of the first and second alignment films 12
3,163 is a polyimide resin precursor after printing a polyamic acid solution or a soluble polyimide solution (hereinafter collectively referred to as an alignment film solution) on a predetermined area of the surface of the glass substrate by, for example, a letterpress printing method or the like. It is formed by being dried and cured by heating in a normal drying oven or the like.

Further, each opening window 16 of the black mask 162
2a is formed in the entire intersection area of the transparent electrodes 122 and 165 when the first substrate 12 and the second substrate 16 are positioned and opposed to each other.

Therefore, the first and second alignment films 123 and 16 are formed.
The peripheral surfaces of the first and second substrates 12 and 16 are positioned and fixed with a sealing material 167 made of epoxy resin or the like so as to face each other with a predetermined gap maintained so that the liquid crystal body 13 is sealed in the gap region. The first and second polarizing plates 1 are arranged on both outer surfaces of the first and second substrates 11 and 16 so that their polarization directions are orthogonal to each other.
The required liquid crystal panel 1 can be constructed by attaching 1,15.

In such a liquid crystal panel 1, the backlight L ₁ incident from the entire surface of the first substrate 12, that is, the entire surface on the side of the first polarizing plate 11, has the opening windows 162a and thus the opening windows 162a arranged in the matrix of the black mask 16 described above. Color filter 163
Since the light can be transmitted only in the area of, the required characters and symbols can be displayed by blocking or passing the light transmitted through the respective opening windows 162a.

In FIG. 6, which illustrates the case where the first alignment film 123 is formed in a predetermined area on the surface of the glass substrate 121, the alignment film solution printing apparatus 2 is roughly classified into the substrate flow direction on the substrate 21, that is, the X Substrate mounting table 22 aligned and fixed in order in _one direction 22
And, first carrier 23, letterpress printing section 24, second carrier
25 and a stocker device 26.

The inner substrate mounting table 22 pushes the substrate X, Y by pressing a plurality of (eight in the figure) positioning pins 221a to the periphery of the mounted substrate, which project from the surface and can be moved by an electric signal. A substrate position adjusting mechanism portion 221 capable of adjusting the position of the substrate by moving it in the same direction or rotating in the same plane, and a substrate mounting plate 222 mounted on the upper surface thereof.
It consists of and.

Then, when the glass substrate 121 with the orientation film forming surface facing upward is placed on the mounting plate 222 by a carrier (not shown) or the like, it projects from the mounting plate 222 and receives a signal from a control unit (not shown). The board 121 is positioned by the operating positioning pin 221a, and the position of the board can be finely adjusted by changing the signal.

Further, the first carrier 23 and the second carrier 25
Is a handler 23b, 25 that extends horizontally at the upper end of rotating shafts 23a, 25a that can rotate, for example, in the range of 180 ° with respect to the base 21.
Each of the handlers 23
b and 25b have fork claws 23c and 25 that can move forward and backward.
c (25c is not shown) is provided.

The rotation of the rotary shafts 23a and 25a and the forward and backward movement of the fork pawls 23c and 25c are both operated by signals from a control unit (not shown).
For example, the first carrier 23 can be mounted on the printing stage to be described later by rotating 180 ° horizontally while holding the glass substrate 121 on the substrate mounting plate 222 on the lower surface side by the fork claws 23c. In addition, the second carrier 25 is rotated 180 ° in the horizontal direction with the fork claw 25c (not shown in the figure) holding the glass substrate 121 on the printing stage on its lower surface side. The stocker device
It can be transferred to a predetermined position on 26.

The letterpress printing section 24, which is arranged between the first carrier 23 and the second carrier 25, is arranged in the Y direction and rotates about the Y direction by a signal from the control section 241. Plate cylinder 243 integrated with the rotating shaft 242 and the plate cylinder 24
The print stage 244 is arranged at a position corresponding to the lower part of 3 and can move up and down and in the X direction in response to a signal from the control unit 241.

In the printing stage 244 in this case, the surface of the glass substrate 121 placed on the upper surface of the printing stage 244 is the plate cylinder 24.
When the plate cylinder 243a having the same size as the alignment film forming region protrudingly formed at a predetermined position on the surface of the plate 3 comes into contact with the plate cylinder.
It moves in the X ₁ direction in conjunction with the rotation of the 243, and when the contact is lost, moves in the opposite direction, that is, the X ₂ direction to return to the initial position, and is related to the rotation of the plate cylinder 243. Instead, it can move in the vertical direction by a signal from the control unit 241.

Therefore, the glass substrate 121 positioned and placed on the substrate placing plate 222 is indicated by the arrow of the first carrier 23.
After being placed on the printing stage 244 as in A ₁ , the printing stage 244 is raised to a position where the letterpress section 243a comes into contact with the glass substrate 121 by a signal from the control section 241, and the above alignment film solution 123 'When the plate cylinder 243 coated on the relief plate portion 243a is rotated, the alignment film solution 123' on the glass substrate surface on the printing stage 244 that moves in the X ₁ direction in conjunction with the rotation of the relief plate portion 243a. Can be printed.

Next, after the printing stage 244 is lowered to the initial position, the glass substrate 121 is moved by the second carrier 25.
Is transferred to the stocker device 26 as indicated by an arrow A ₂ to form the illustrated glass substrate 121 ′, and the alignment film solution 123 ′ is dried and hardened in, for example, a drying oven or the like, and the glass substrate 121 ′ shown in FIG. The required alignment film 123 described above is formed.

On the other hand, since the alignment film formation region regulates the display region of the liquid crystal panel, it is desirable to make it as large as possible. However, the periphery of the alignment film formation region is the sealing material as described in FIG. Sealed with 167.

In this case, if the alignment film is formed up to the sealing region by the sealing material 167, the alignment film is interposed between the sealing material 167 and the glass substrate surface, and the glass substrate surface is sealed. Adhesion with the material 167 may be deteriorated and a sealing failure may easily occur, resulting in deterioration of the characteristics of the liquid crystal panel.

Therefore, it is necessary to form the alignment film in a region as large as possible inside the seal material forming portion. This means that it is necessary to strictly set the relative positional relationship between the glass substrate and the alignment film forming region and then print the above-mentioned alignment film solution.

Therefore, conventionally, an alignment film is formed on a glass substrate prepared in advance for alignment through the procedure described with reference to FIG. 6, and the amount of misalignment of the obtained alignment film formation region with respect to the glass substrate is measured. After the position of the glass substrate on the substrate mounting plate 222 is adjusted, the work of forming the alignment film on the glass substrate 121 for mass production is performed.

In the above description, the light transmission type liquid crystal panel is taken as an example so that the alignment film is formed on the transparent glass substrate. However, when the alignment film is formed on an opaque substrate such as a light reflection type liquid crystal panel. However, the same alignment film forming work as described above is performed.

[0026]

However, in the method of manufacturing a liquid crystal panel which involves such an alignment film solution printing operation, it is necessary to perform an alignment film forming operation using a substrate for alignment before starting the operation. In addition to being unable to expect improvement, it is possible to prevent the occurrence of defects due to the relative misalignment between the substrate and the alignment film solution printing area during the alignment film solution printing operation because all the substrates cannot be inspected. There was a problem that I could not do it.

[0027]

The above problem is a method of manufacturing a liquid crystal panel in which an alignment film is formed on the surface of a substrate, and a letterpress printing technique for a substrate positioned on a printing stage in a positioned state. In the printing process of the alignment film solution by the method, a plate cylinder provided with a relief plate portion for printing the alignment film solution and a registration mark near the outside of the alignment film solution is rotated in a state of being brought into contact with the substrate on the printing stage. When the alignment mark faces or contacts the substrate surface during the step of printing the alignment film solution applied to the relief plate on the surface of the substrate that moves in association with the rotation of the substrate, the alignment of the substrate is performed. This is achieved by a method for manufacturing a liquid crystal panel, which includes a step of detecting a positional deviation between a positioning mark provided at a position corresponding to the mark and the alignment mark.

Further, in a liquid crystal panel manufacturing apparatus in which an alignment film is formed on the surface of a substrate, the substrate on a substrate mounting table on which the substrate for forming the alignment film is placed is transferred to a relief printing section. At least a first carrier, the letterpress printing section, and a second carrier for transferring the substrate located in the letterpress printing section to the stocker device are provided, and a positioning mark is provided in a blank portion near the alignment film formation region. The relief printing section in the orientation film solution printing apparatus that prints the orientation film solution on the surface of the formed substrate by a relief printing technique, comprises a relief printing portion for alignment film solution printing and an alignment mark near the outside thereof. A printing cylinder, which is a cylinder mounted with a printing plate and is rotatable about its central axis, and a printing stage, which can move in conjunction with the rotation of the plate cylinder when in contact with the surface of the relief plate, The printing stage Is an image pickup device internally provided so as to face the position of the alignment mark toward the position of the alignment mark, and a signal line connected to the image pickup device is a combination of the alignment mark and the positioning mark obtained by the image pickup device. This is achieved by an apparatus for manufacturing a liquid crystal panel, which is connected to a substrate position adjusting mechanism section of the substrate mounting table via an image processor and an alignment control section capable of detecting a positional deviation between the marks from the generated image signal. It

[0029]

The position of the succeeding substrate is adjusted based on the positional shift information so that the positional shift between the positioning mark provided on the substrate and the alignment mark provided on the printing relief plate of the plate cylinder can be detected. When the alignment film solution printing apparatus is configured to obtain the above, it is possible to automatically detect the positional deviation of all the substrates with respect to the printing relief plate and automatically perform the subsequent position adjustment of the substrates.

Therefore, in the present invention, the matching state of the positioning mark provided on the margin portion outside the alignment film forming area of the substrate and the alignment mark provided at the mark corresponding position of the printing relief plate mounted on the plate cylinder is set on the printing stage. After converting to an image signal with an image pickup device installed internally, the amount of positional deviation between the positioning mark and the alignment mark obtained from the image signal is applied to the substrate position adjusting mechanism provided on the substrate mounting table or the printing stage. The position of the subsequent substrate is adjusted by feedback.

This means that the positional deviation between the printing cylinder side printing relief plate and all the substrates is automatically adjusted. Therefore, it is possible to eliminate the positional deviation between each substrate and the printing area for the alignment film solution, and it can be expected that the productivity is improved.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a process diagram (1) for explaining a method for manufacturing a liquid crystal panel according to the present invention, and FIG. 2 is a process diagram (2) for explaining a method for manufacturing a liquid crystal panel according to the present invention.

FIG. 3 is a diagram showing a structural example of an alignment film solution printing apparatus which realizes the present invention, and FIG. 4 is a diagram showing a structural example of another alignment film solution printing apparatus which realizes the present invention. In the description of the drawings, the case where the alignment film solution printing apparatus in FIG. 6 is diverted to print the alignment film solution on the glass substrate described in FIG. The same symbols are given to the parts and parts, and the duplicate description is omitted.

In FIG. 1 (A), at the predetermined position on the surface of the plate cylinder 243 described with reference to FIG. A printing relief plate 411 integrally formed with a ring-shaped alignment mark 411a that is protruded further is mounted.

A printing stage having the same structure as that shown in FIG.
412 has a position corresponding to when the alignment mark 411a of the printing relief plate 411 rotating with the plate cylinder 243 is located at the lowest point, in other words, when the alignment mark 411a is closest to the printing stage 412. , The alignment mark 41
In the direction of 1a, that is, in the case of the figure, the CCD (Charg
An imaging device 413 such as an e-coupled device) is formed with an observation hole 412a in which it is installed.

On the other hand, the glass substrate 122 having the same size as the glass substrate 121 described with reference to FIG. 5 has the above-mentioned alignment mark 411a in the peripheral margin portion of the alignment film forming area shown by the broken line B having the same size as the relief plate portion 243a. A dot-shaped positioning mark 122a smaller than the inner diameter of the mark 411a is patterned and formed at a position corresponding to.

Therefore, the glass substrate 122 positioned and mounted on the substrate mounting plate 222 described with reference to FIG.
After being transferred at 23 and placed on the printing stage 412, the substrate
By raising the printing stage 412 to a position where the surface of 122 and the relief plate 243a come into contact with each other, the state shown in the drawing can be obtained.

Next, when the plate cylinder 243 in which the above-mentioned alignment film solution 123 'is applied to the relief plate portion 243a of the printing relief plate 411 is rotated by a signal from the control unit 241 described in FIG. The letterpress portion 243a of the glass substrate 12
The state shown in (B) comes into contact with 2.

Then, the plate cylinder 243 is attached to the above-mentioned alignment mark.
When 411a is further rotated until it is located at the lowest point, the printing stage 412 moves in association with the rotation as shown by arrow C ₁ , but during the movement, the alignment mark 411a is moved to the surface of the glass substrate 122. There is a point of contact, but (C) shows the state at that time.

At this point, since the image pickup device 413 in the observation hole 412a provided in the printing stage 412 faces the alignment mark 411a, the alignment mark 411a (a ring-shaped mark in the figure) is It can be converted into an image signal by the imaging device 413.

On the other hand, since the above-mentioned positioning mark 122a (dot mark in the case of the figure) of the glass substrate 122 is positioned between the image pickup device 413 and the alignment mark 411a, the mark 122a is also taken by the image pickup device. Image signals are simultaneously converted by 413.

This indicates that the image pickup device 413 can obtain a combined image signal of the alignment mark 411a of the printing relief plate 411 and the positioning mark 122a of the glass substrate 122.

Therefore, by connecting the image signal from the image pickup device 413 to the display device via an image processor or the like (not shown), the positioning mark 122a is positioned in the alignment mark 411a, for example, as shown in FIG. It is possible to obtain an image as shown in the figure (C ″) in which the two are displaced in position.

The orientation film solution 123 'applied to the surface of the relief plate 243a is printed on the glass substrate in the area in contact with the glass substrate from the time (B) to the time (C). When the plate cylinder 243 is further rotated, the printing stage 412, that is, the glass substrate 122 moves in association with the rotation as shown by an arrow C ₂ , and the rear end of the relief plate portion 243a comes into contact with the surface of the glass substrate 122. The state of 2 (D) is reached, but at this point, all of the alignment film solution 123 ′ is printed on the substrate 122.

Thereafter, the plate cylinder 243 is rotated and the printing stage 412 is lowered to correspond to the above "C ₁ + C ₂ ".
By moving only C _{3 in the} opposite direction to return to the initial position shown in (E), and further taking out the glass substrate 122 with the second carrier 25 as shown in (F), the alignment film formation described in (A) is formed. Glass substrate 12 having alignment film solution 123 'printed on the area B
2'can be obtained as in the extraction diagram (F ').

Therefore, as described below with reference to FIG. 6, the desired alignment film 12 is obtained by drying and hardening the alignment film solution 123 '.
The required glass substrate on which 3 is formed can be obtained.
The image taken by the image pickup device 413 is, for example, as shown in the extraction diagram (C ″) of (C) above, the alignment mark 41 of the printing letterpress 411.
1a and the positioning mark 122a of the glass substrate 122 are eccentric,
Further, when the eccentricity amounts of the center points of the respective marks in the X and Y directions exceed a preset range, the image signal from the image pickup device 413 is converted into a shift amount in the X and Y directions by an image processor (not shown) or the like. Then, the signal data is used for the substrate position adjusting mechanism 221 of the substrate mounting table 22 described with reference to FIG.
After adjusting the position of the glass substrate 122 placed on it by feeding back to the substrate mounting plate 222, by going through the steps (A) to (F) described above, the alignment film solution printing area on the glass substrate is Positional deviation can be easily eliminated.

In the alignment film forming method based on such an alignment film solution printing step, since the relief plate portion 243a defining the alignment film formation region and the alignment mark 411a for the glass substrate 122 are integrated in the printing relief plate 411, Only when the mark 411a and the positioning mark 122a on the glass substrate 122 match, the letterpress section 24
3a As a result, the relative positions of the alignment film forming area and the glass substrate 122 are surely aligned, and the image signal from the image pickup device 413 is obtained for each substrate. Therefore, the data is fed back to the position adjusting mechanism section 221. Therefore, it is possible to suppress the occurrence of continuous defects of the glass substrate 122 that follows.

FIG. 3 illustrating the manufacturing apparatus according to the present invention.
In the alignment film solution printing apparatus 4 for realizing the present invention, only the relief printing section 24 in the alignment film solution printing apparatus 2 described in FIG. 6 is replaced with the relief printing section 41 according to the present invention.
Others are the same as those of the alignment film solution printer 2.

In the figure, for easy understanding, all of the substrate mounting table 22, the first carrier 23 and the second carrier 25 are cut and removed. Particularly, in this case, the letterpress printing section 41 is disposed in the Y direction and is controlled by the control section 24.
Plate cylinder integrated with the rotary shaft 242 that rotates by the signal from 1.
243 and a control unit arranged at a position corresponding to the lower part of the plate cylinder 243.
The print stage 412 described in FIG. 1 can move up and down and in the X direction in response to a signal from 241.

The predetermined position on the surface of the inner plate cylinder 243 is shown in FIG.
The printing letterpress 411 described in 1 is attached. The printing stage 412 has a glass substrate positioned and placed on the upper surface, similar to the printing stage 244 in FIG.
While it is in contact with the relief plate 243a, it moves in the X ₁ direction in conjunction with the rotation of the plate cylinder 243 and returns to the initial position by moving in the X ₂ direction when the contact disappears and the vertical direction changes. The plate cylinder 24
It can move regardless of the rotation of 3.

Then, in the observation hole 412 corresponding to the position when the alignment mark 411a of the printing relief plate 411 rotating in contact with the glass substrate reaches the lowest point, the image pickup device 413 described in FIG. Is installed inside.

This indicates that the image pickup device 413 converts the image signal into an image signal when the alignment mark 411a reaches the lowest point.
Also, as described in FIG. 1, the dot-shaped positioning mark 12
Since the pattern 2a is formed, as a result, the glass substrate 122 is placed on the printing stage 412, whereby the alignment mark 411a and the positioning mark 122a are formed.
The image combined with is converted into a signal.

In this case, when the combined image has the positioning mark 122a inside the alignment mark 411a as shown in (C ') of FIG. 1 (in other words, X between the center points of the respective marks). (When the amount of deviation in the Y and Y directions is small)
Is set as a non-defective item, and the X direction and Y between the center points of the marks are set.
It is generally easy to determine a defect when the amount of deviation in the direction becomes large and the positioning mark 122a exceeds the alignment mark 411a as shown in FIG. 1 (C ″).

Therefore, in order to automatically make such judgment and response, the signal line 413 connected to the image pickup device 413 is connected to the display device 415 via the image processor 414, and from the image processor 414 via the alignment control section 416. The substrate position adjusting mechanism portion 221 of the substrate mounting table 22 is further connected to the stocker device 42 including the sequencer 421 from the image processor 414 via the buffer controller.

Therefore, the position shift of the alignment film solution printing area with respect to the glass substrate 122 can be easily known from the image signal in which the alignment mark 411a and the positioning mark 122a are combined as described above with reference to FIG. By transmitting the positional deviation information to the display device 415, the visual observation of the positional deviation becomes possible, and by transmitting the information to the substrate position adjusting mechanism section 221 of the substrate mounting table 22, the position of the succeeding substrate is moved. Adjustment is possible, and the information is further stored in the stocker device 42.
It is possible to reject only the substrate in which the defective positional displacement has occurred by delivering it to the substrate.

Therefore, as described below with reference to FIG. 6, after the printing stage 412 is lowered to the initial position, the glass substrate 122 is transferred to the stocker device 42 by the second carrier 25 and the glass substrate 122 'shown in FIG. After the state, the alignment film precursor solution is dried and hardened in, for example, a drying oven, so that the required alignment film 123 described with reference to FIG. 6 can be formed on the glass substrate 122.

In FIG. 4, which illustrates another manufacturing apparatus, the alignment film solution printing apparatus 5 includes only the relief printing section 41 of the alignment film solution printing apparatus 4 described in FIG.
3 is replaced with the letterpress printing section 51 to which the substrate position adjusting mechanism section 221 described in FIG.
The signal line connected to the image pickup device 413 installed in 2 is connected to the substrate position adjusting mechanism section 221 of the relief printing section 51 via the image processor 414 and the alignment control section 416.

In the relief printing section 51 having such a structure, the positional deviation information between the alignment mark 411a and the positioning mark 122a detected by the image pickup device 413 is directly printed on the printing stage 41.
Since it is delivered to the second substrate position adjusting mechanism unit 221, it is not necessary to provide the substrate position adjusting mechanism unit 221 on the substrate placing table arranged immediately before the letterpress printing unit 51 in FIGS. However, there is an advantage that the substrate can be transferred to the relief printing section 51.

[0059]

As described above, according to the present invention, it is possible to provide a method of manufacturing a liquid crystal panel and a manufacturing apparatus therefor, in which the positional deviation of the substrate surface alignment film forming region with respect to the substrate is eliminated to improve the productivity.

In the description of the present invention, the case where the alignment mark provided on the plate cylinder side is ring-shaped and the positioning mark provided on the substrate side is dot-shaped is used as an example. It is obvious that the same effect can be obtained between any marks as long as the relative displacement at the center point can be detected as in "+".

[Brief description of drawings]

FIG. 1 is a process diagram (1) for explaining a method for manufacturing a liquid crystal panel according to the present invention.

FIG. 2 is a process diagram (2) for explaining the method of manufacturing a liquid crystal panel according to the present invention.

FIG. 3 is a diagram showing a configuration example of an alignment film solution printing apparatus that realizes the present invention.

FIG. 4 is a diagram showing a configuration example of another alignment film solution printing apparatus that realizes the present invention.

FIG. 5 is a diagram schematically illustrating a basic configuration example of a liquid crystal panel.

FIG. 6 is a diagram illustrating a conventional method of printing an alignment film solution together with the apparatus.

[Explanation of symbols]

4,5 Alignment film solution printing device 21 Base 22 Substrate placing table 23 First carrier 23c Fork claw 25 Second carrier 26,42 Stocker device 41,51 Letterpress printing part 122,122 'Glass substrate (transparent substrate) 122a Positioning mark 123 Alignment film 123 ′ Alignment film solution 221 Substrate position adjustment mechanism 221a Positioning pin 222 Substrate mounting plate 241 Control unit 242 Axis 243 Plate cylinder 243a Convex part 411 Printing letterpress 411a Alignment mark 412 Printing stage 412a Observation hole 413 Imager 414 image Processor 415 Display device 416 Alignment control unit 417 Buffer device 421 Sequencer

Claims (8)

[Claims] 1. A method of manufacturing a liquid crystal panel in which an alignment film is formed on a surface of a substrate, which comprises a step of printing an alignment film solution on a substrate positioned on a printing stage in a positioned state by a relief printing technique. , A plate cylinder provided with a relief printing portion for printing an alignment film solution and alignment marks near the outside of the alignment film solution is rotated while being in contact with the substrate on the printing stage, and the plate cylinder moves in conjunction with the rotation of the plate cylinder. It is provided at a position corresponding to the alignment mark of the substrate at the moment when the alignment mark faces or contacts the substrate surface in the step of printing the alignment film solution applied to the letterpress portion on the substrate surface. And a step of detecting a positional shift between the positioning mark and the alignment mark, the manufacturing method of the liquid crystal panel. 2. A substrate position adjusting mechanism section of a substrate mounting table, which is located immediately before the printing step, in which positional deviation information between the detected alignment mark and the positioning mark is detected in the printing process of the alignment film solution according to claim 1. And a step of correcting the positional deviation of the substrate mounting table to correct the positional deviation. 3. A stocker provided with a sequencer in the printing process of the alignment film solution according to claim 1 or 2, wherein the positional deviation information between the detected alignment mark and the positioning mark is located immediately after the printing process. And a step of causing the substrate to be delivered to the device and rejecting the substrate when the amount of positional deviation exceeds an allowable value is transferred to the stocker device. 4. The positioning mark and the alignment mark obtained by an image pickup device, which is installed at the position closest to the alignment mark of the printing stage, for the positional deviation between the positioning mark and the alignment mark according to claim 1. A method for manufacturing a liquid crystal panel, which is characterized by detecting the relative shifts of the center points of the marks in the combined video signal in the X and Y directions. 5. An apparatus for manufacturing a liquid crystal panel, wherein an alignment film is formed on the surface of a substrate, wherein the substrate on a substrate mounting table on which the substrate for forming the alignment film is placed is transferred to a relief printing section. At least a first carrier, the letterpress printing section, and a second carrier for transferring the substrate located in the letterpress printing section to the stocker device are provided, and a positioning mark is provided in a blank portion near the alignment film formation region. The relief printing section in the orientation film solution printing apparatus that prints the orientation film solution on the surface of the formed substrate by a relief printing technique, includes a relief printing portion for alignment film solution printing and an alignment mark near the outside thereof. A printing cylinder, which is a cylinder mounted with a printing plate and is rotatable about its central axis, and a printing stage, which can move in conjunction with the rotation of the plate cylinder when in contact with the surface of the relief plate, On the printing stage An image pickup device is provided in the closest position of the alignment mark so as to face the alignment mark, and a signal line connected to the image pickup device is composed of the alignment mark and the positioning mark obtained by the image pickup device. A liquid crystal panel, which is connected to a substrate position adjusting mechanism unit of the substrate placing table via an image processor and an alignment control unit capable of detecting the positional deviation between the marks from the image signal. apparatus. 6. An apparatus for manufacturing a liquid crystal panel, wherein a signal line connected to the image pickup apparatus according to claim 5 is connected from the image processor to a stocker apparatus having a sequencer via a buffer control unit. 7. A liquid crystal panel manufacturing apparatus, wherein a signal line connected to the image pickup device according to claim 5 or 6 is connected from the image processor to a display device. 8. The alignment film solution printing apparatus according to claim 5,
First transfer of the substrate located in the immediately preceding process to the relief printing unit
Carrier, the letterpress printing section, and a second carrier for transferring the substrate located in the letterpress printing section to the next step, and the signal line connected to the image pickup device provided in the letterpress printing section is An apparatus for manufacturing a liquid crystal panel, which is connected to a substrate position adjusting mechanism section of a printing stage constituting the relief printing section via an image processor and an alignment control section.