JP2001079467A - Apparatus and method for coating photosensitive resin onto color display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the amount of resist consumed and reduce cost required for waste disposal. SOLUTION: A transfer sheet S fed by being paid out by a paying-out system 10 is transferred to and coated on a transfer face P1a of a glass panel P by a transfer roll 42 having a roll face R heated to a specified temperature by a heating system 50 and a notch K. The transfer sheet S that has undergone transferring is taken up by a taking-up system 60 to be recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coating apparatus and a coating method for coating a photosensitive resin such as a color filter, a black matrix, or a phosphor on the surface of a color display panel such as a color television or a liquid crystal color display. .

[0002]

2. Description of the Related Art In general, a color CRT of a color television, for example, has a substantially rectangular box-shaped glass panel having a folded portion all around its periphery, an electron gun for emitting three electron beams, and a face of the glass panel. Phosphors formed on the inner surface of the plate and receiving the electron beam emitted from the electron gun to emit light in three primary colors (R, G, B), and disposed between the phosphor and the electron gun. It is provided with a shadow mask or the like for selectively passing only the electron beam in a necessary direction and blocking the electron beam in an unnecessary direction. By the way, when it is desired to further improve the color clarity of the color CRT, at least one of the three primary colors (R, G, B) of light is provided between the inner surface of the face plate of the glass panel and the phosphor. Are provided.

The formation of a color filter on a glass panel will be described below. Conventionally, a photosensitive resist solution containing a colorant for a color filter is applied to a glass panel, dried, and dried by a predetermined photolithography method. A predetermined filter pattern was formed on the panel. In brief, first, a resist solution is dropped on a glass panel, and the glass panel is rotated and applied. Then, the applied resist solution is dried to form a resist film (coating). Next, the glass panel is exposed to ultraviolet light, and the resist film is exposed to a predetermined filter pattern (exposure). Subsequently, the resist film is developed using a developer or the like to correspond to the filter pattern of the resist film. The portion other than the portion to be removed is removed (developed), and as a result of these processes, a predetermined filter pattern is formed on the glass panel.

[0004]

However, in the above-mentioned conventional method for forming a color filter, a so-called wet coating process is performed using a liquid resist (resist solution) at the time of the coating process. When the is rotated, a large amount of excess resist solution is scattered. At this time, there is a problem that not only the surplus resist solution is wasted but also a facility for discarding the waste solution (waste solution) is costly.

Accordingly, an object of the present invention is to solve the above-mentioned technical problems and to reduce the consumption of resist and the cost required for disposal by not using a solution of a photosensitive resin such as a resist solution. It is an object of the present invention to provide an apparatus and a method for coating a color display panel with a photosensitive resin.

[0006]

According to a first aspect of the present invention, there is provided a transfer sheet comprising a base sheet and a photosensitive resin layer laminated on the base sheet. Sheet supply means, a transfer roll which rolls while pressing the transfer sheet supplied from the sheet supply means against the panel, heating means for heating the roll surface of the transfer roll to a predetermined temperature, and photosensitive resin by the transfer roll And a sheet collecting means for collecting a transfer sheet after the layer has been transferred to the panel.

According to a second aspect of the present invention, in the apparatus for coating a color display panel with a photosensitive resin according to the first aspect, the roll surface of the transfer roll extends in a direction substantially parallel to a rolling axis of the transfer roll. A device for coating a color display panel with a photosensitive resin, wherein a part of the panel is cut away.

The invention according to claim 3 is the invention according to claim 1 or 2
In the apparatus for coating a photosensitive resin on a color display panel according to the above, the roll surface of the transfer roll,
An apparatus for coating a photosensitive resin on a color display panel, which is formed of an elastic body.

The invention according to claim 4 is the invention according to claims 1 to 3
In the apparatus for coating a color display panel with a photosensitive resin according to any one of the above, before the transfer roll presses the transfer sheet against the panel, the apparatus further comprises sheet proximity means for bringing the transfer sheet close to the panel. This is an apparatus for coating a color display panel with a photosensitive resin.

[0010] The invention according to claim 5 is the invention according to claims 1 to 4.
In the apparatus for coating a photosensitive resin on a color display panel according to any one of the above, the photosensitive resin layer is provided near a transfer sheet before being transferred to the panel,
5. The color display panel according to claim 1, further comprising a heat shielding means for preventing radiant heat from a transfer roll or a heating means from being applied to the transfer sheet. It is a coating device.

According to a sixth aspect of the present invention, a transfer sheet comprising a base sheet and a photosensitive resin layer laminated on the base sheet is pressed against a panel by a transfer roll having a roll surface heated to a predetermined temperature. Rolling a transfer roll, coating the panel with a photosensitive resin layer, and then collecting a transfer sheet after the photosensitive resin layer is transferred to the panel. This is a method of coating a conductive resin.

According to the apparatus for coating a color display panel with a photosensitive resin according to the first aspect of the present invention, the transfer sheet supplied from the sheet supply means is:
The photosensitive resin layer of the transfer sheet is transferred and coated on a surface to be transferred of the panel (hereinafter, referred to as a transfer surface) by being pressed against the panel by the transfer roll. The transfer sheet after transfer of the photosensitive resin layer (the base sheet to which the photosensitive resin layer is partially adhered) is collected by sheet collecting means. Therefore, in this coating apparatus, the photosensitive resin layer (solid) laminated on the transfer sheet is used instead of the conventional photosensitive resin solution (liquid) such as a resist solution, and the transfer surface of the panel is used. Coating with photosensitive resin. That is,
Instead of a conventional wet coating process, a so-called dry coating process is performed.

[0013] Therefore, unlike the conventional case, a large amount of excess resist is not scattered, so that the consumption of the resist can be minimized. Further, since the transfer sheet collected by the sheet collecting means can be discarded by incineration or the like, a great deal of cost is not required for the disposal process as compared with the related art. Further, the transfer sheet can be regenerated by coating the photosensitive resin layer again on the base sheet of the transfer sheet collected by the sheet collecting means.

Further, since the roll surface of the transfer roll is heated to a predetermined temperature by the heating means, it is possible to reliably coat the photosensitive resin layer from the transfer sheet to the panel by the action of heat.

Here, the photosensitive resin is a photosensitive resin for a color filter, a black matrix, or a phosphor, and the panel is a color resin such as a color television or a liquid crystal color display. Panel. Further, the sheet supply means may be a kind of an unwinding roll for unwinding a rolled transfer sheet, and the sheet collection means may transfer the transfer sheet after the photosensitive resin layer is transferred. It may be something like a take-up roll that takes up a roll. Further, the heating means may be an infrared lamp that applies heat to the roll surface from outside the transfer roll, or a heating element that is built into the transfer roll itself and applies heat to the roll surface. It may be.

According to the apparatus for coating a photosensitive resin on a color display panel according to the second aspect of the present invention,
Since a part of the roll surface of the transfer roll is cut away along a direction substantially parallel to the rolling axis of the transfer roll, two linear edge portions are formed on the roll surface as a result. Therefore, if the radius of the transfer roll is appropriately determined so that the two linear edges are located at the start and end of the transfer surface of the panel, the start and end of the transfer surface can be obtained by the action of the linear edge. The boundary line between the transfer surface and the outer part (hereinafter, referred to as a transfer boundary line) is substantially straight,
Transfer defects at the start and end of the transfer surface are prevented. When the roll surface has no notch and no linear edge portion exists, that is, when the cylindrical surface of the roll surface is located at the beginning and end of the transfer surface, the photosensitive resin layer outside the area of the transfer surface is peeled off. As a result, the transfer boundary line becomes an indefinite curve, and transfer failure easily occurs.

Further, even when the folded portion is formed over the entire periphery of the panel, such as a panel for a color cathode ray tube of a color television, the straight edge portion is located at a position close to the folded portion of the panel. Can enter, so that the photosensitive resin can be transferred even at a position close to the folded portion of the panel. For this reason, there is an effect that the range of the transfer surface can be enlarged and the effective screen of the panel can be enlarged.

According to the apparatus for coating a color display panel with a photosensitive resin according to the third aspect of the present invention,
The roll surface of the transfer roll is formed of an elastic member (elastic body) such as rubber such as silicon rubber or fluorine rubber or resin such as fluorine resin. In general, a panel for a color CRT of a color television has a gentle curved face plate. Even in such a case, if the hardness and the thickness of the elastic body on the roll surface, or the pressure for pressing the transfer roll against the panel are appropriately set,
Since the roll surface of the transfer roll is deformed along the curved surface of the face plate, it is possible to transfer the photosensitive resin uniformly over the entire transfer surface of the panel.

According to the apparatus for coating a photosensitive resin on a color display panel according to the invention of claim 4,
After the transfer sheet is brought close to the panel by the sheet proximity means, the transfer sheet is pressed against the panel by the transfer roll, and the photosensitive resin is transferred to the transfer surface of the panel. Therefore, when there is no sheet proximity means and the transfer roll approaches the panel while directly pressing the transfer sheet, wrinkles may occur on the transfer sheet and transfer failure may occur, but in the case of the present invention, Since the transfer sheet is brought close to the panel by the sheet proximity means, such transfer failure does not occur.

According to the apparatus for coating a color resin panel with a photosensitive resin of the invention according to claim 5,
The heat shielding means prevents the transfer sheet before the photosensitive resin layer is transferred to the panel, that is, the transfer sheet in which the photosensitive resin layer is laminated on the base sheet from being exposed to radiant heat from the transfer roll or the heating means. Is done. For this reason, the radiant heat does not increase the adhesion between the base sheet and the photosensitive resin layer, and does not cause the transfer failure of the photosensitive resin to the panel. That is, when the photosensitive resin is transferred to the panel, the photosensitive resin layer is satisfactorily separated from the base sheet, so that occurrence of transfer failure can be prevented.

According to the method of coating a color display panel with a photosensitive resin according to the present invention, the transfer sheet is pressed against the panel by a transfer roll, and the transfer sheet is exposed to the transfer surface of the panel. The conductive resin layer is coated. The transfer sheet after the transfer of the photosensitive resin layer (the base sheet to which the photosensitive resin layer is partially adhered) is collected. Therefore, in this coating method, the photosensitive resin layer (solid) laminated on the transfer sheet is used instead of the conventional photosensitive resin solution (liquid) such as a resist solution, and the transfer surface of the panel is used. Coating with photosensitive resin.
In other words, instead of the conventional wet coating process, a so-called dry coating process is performed.

Therefore, the excess resist is not scattered in a large amount as in the prior art, so that the consumption of the resist can be minimized. Further, since the collected transfer sheet can be discarded by incineration or the like, a great deal of cost is not required for the disposal process as compared with the related art. Further, the base sheet of the recovered transfer sheet may be coated with a photosensitive resin layer again to regenerate the transfer sheet.

Further, since the roll surface of the transfer roll is heated to a predetermined temperature, the coating of the photosensitive resin layer from the transfer sheet to the panel can be reliably performed by the action of heat.

Here, the photosensitive resin is a photosensitive resin for a color filter, a black matrix or a phosphor, and the panel is a panel for a color display such as a color television or a liquid crystal color display. Panel.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of the present invention for solving the above-mentioned technical problems will be described below in detail with reference to the accompanying drawings.

First, an apparatus and method for coating a color CRT panel with a color filter according to an embodiment of the present invention will be described.
FIG. 1 is a schematic diagram showing the configuration of a color filter coating apparatus for a color CRT panel according to an embodiment of the present invention. This coating apparatus is an apparatus that transfers a color filter layer formed on one surface of a transfer sheet S to a transfer surface P1a of a face plate P1 of a rectangular box-shaped glass panel P for a color CRT.
Here, the transfer surface P1a refers to the surface of the inner surface of the face plate P1 to which the color filter layer is to be transferred. The glass panel P is a face plate P
1 has a folded portion P2 that is folded at the peripheral portion of the entire periphery of the face plate 1, and the face plate P1 is not a perfect plane,
It has a gentle curved surface having a predetermined curvature. To be precise, this curved surface is defined by two directions, that is, the depth direction of the page and the horizontal direction of the page.
Each has a predetermined curvature in the axial direction, and these predetermined curvatures differ depending on the position on the face plate P1. Note that, in FIG. 1 and FIGS. 3 to 9 described later, the face plate P1 is depicted in a plan view for the convenience of drawing.

First, FIG. 2 shows a cross-sectional structure of a transfer sheet S used in this coating apparatus. As can be seen from FIG. 2, the transfer sheet S includes a base sheet S1, a color filter layer S2 formed on one surface of the base sheet, and a protective sheet S3 covering the surface of the color filter layer S2.

For example, the base sheet S1 is a long resin sheet made of polyethylene terephthalate, and the color filter layer S2 is a layer of a photosensitive resin such as a pigment-dispersed color resist. Further, the protection sheet S3 has a color filter layer S in a state where the transfer sheet S is rolled and the sheets are overlapped.
2 prevents the base sheet S1 from closely adhering to the base sheet S1 stacked thereon, and is, for example, a long resin sheet made of polyethylene terephthalate.

Since the adhesion between the color filter layer S2 and the base sheet S1 is larger than the adhesion between the color filter layer S2 and the protection sheet S3, the protection sheet S3 is separated from the transfer sheet S. In this case, the color filter layer S2 does not peel off from the base sheet S1 and transfer failure does not occur. Further, in the present embodiment, the transfer sheet S is a long sheet that can be wound up in a roll shape, and the width thereof is shorter than the interval between the folded portions P2 of the glass panel P in the depth direction of FIG. I have.

As shown in FIG. 1, the coating apparatus for performing processing using the transfer sheet S includes an unwinding mechanism 10 for unwinding and supplying a roll-shaped transfer sheet S, and a transfer sheet S to a protective sheet S3. , A sheet proximity mechanism 30 for bringing the transfer sheet S from which the protective sheet S3 has been peeled close to the transfer surface P1a of the glass panel P, and rolling while transferring the transfer sheet S against the transfer surface P1a. The transfer roll mechanism 40 for transferring the color filter layer S2 to the surface P1a, the roll surface R of the transfer roll 40
And a winding mechanism 60 for winding and collecting the transfer sheet S after the transfer of the color filter layer S2.

Next, the structure of each of these mechanisms will be described with reference to FIG.
This will be described with reference to FIG. First, the unwinding mechanism 10 has a transfer sheet S set in a roll shape and a driving source M1 such as a motor.
An unwinding roll 11 that is rotated and driven to unwind the transfer sheet S, and an auxiliary roll 12 that converts the transfer direction of the transfer sheet S unwound by the unwinding roll 11 into a substantially horizontal state. Note that the transfer sheet S is set on the unwinding mechanism 10 so that the protection sheet S3 is positioned downward in the drawing.

The protective sheet peeling mechanism 20 includes a peeling roll 21 for peeling the protective sheet S3 from the transfer sheet S.
And a protective sheet take-up roll 22 that is driven to rotate by a drive source M2 such as a motor and winds the separated protective sheet S3.

The sheet proximity mechanism 30 includes a first sheet presser 31 having a V-shaped cross section provided on the upstream side in the conveying direction of the transfer sheet S, and a second sheet holder 31 having a V-shaped cross section provided on the downstream side. And a sheet holder 32. Further, the first sheet presser 31 and the second sheet presser 32 can be moved up and down in a direction approaching / separating from the glass panel P by a not-shown elevating means such as a motor and a cylinder, and the second sheet presser 32 is further not shown. It can be moved in the horizontal direction by horizontal moving means. Further, the first sheet presser 31 and the second sheet presser 32 are respectively provided with substantially vertical pressing portions 31a, 32a and substantially horizontal cover portions 31b, 32b.
And the leading ends (lower ends) of the holding portions 31a and 32a hold the transfer sheet S.

In particular, the cover 31b of the first sheet presser 31 applies the transfer roll mechanism 40 to the transfer sheet S before the color filter layer S2 is transferred to the glass panel P.
Alternatively, radiant heat from the heating mechanism 50 is prevented from hitting. Also, the width of the first sheet presser 31 and the second sheet presser 32 in the depth direction of the paper is
, And shorter than the interval between the folded portions P2 of the glass panel P in the depth direction of the paper.

The transfer roll mechanism 40 has a rolling shaft 41 to which a rotational driving force is transmitted by a driving source M3 such as a motor.
And a part thereof (notched portion K: 2 in FIG. 1) fixed around the rolling shaft 41 and extending in a direction substantially parallel to the rolling shaft 41.
(A portion surrounded by a dashed-dotted line) of the transfer roller 42. Straight edge portions E1 and E2 are formed at the boundary between the roll surface R of the transfer roll 42 and the cutout portion K. The transfer roll mechanism 4
Numeral 0 is movable in the horizontal and vertical directions by a moving means 43 using a motor or the like as a driving source. Further, a clutch mechanism C is provided between the driving source M3 and the rolling shaft 41.
Is provided, and by the operation of the clutch mechanism C,
The transmission of the rotational driving force from the driving source M3 to the rolling shaft 41 can be started / stopped.

The transfer roll 42 includes a base 42a made of metal such as aluminum, and an outer peripheral portion 42b including a roll surface R and made of a heat-resistant elastic material such as silicon rubber or fluorine rubber. Since the outer peripheral portion 42a including the roll surface R is formed of an elastic material, if the hardness and thickness of the elastic material or the pressure of pressing the transfer roll 42 against the glass panel is appropriately set, the roll surface R can be adjusted. Is deformed along the spherical surface of the face plate P1, so that the color filter layer S2 can be transferred uniformly over the entire transfer surface P1a. Note that the length of the transfer roll 42 in the depth direction of the paper is longer than the width of the transfer sheet S in the depth direction of the paper and shorter than the interval between the folded portions P2 of the glass panel P in the depth direction of the paper.

The heating mechanism 50 includes a heat insulating cover 51 having a shape covering the upper half of the transfer roll 42 and an infrared lamp 52 provided on the inner surface thereof and applying heat to the roll surface R of the transfer roll 42. . The infrared lamp 52
Is based on a temperature detected by a temperature detector (not shown) embedded in the transfer roll 42 so that the roll surface R has a predetermined temperature (for example, 110 to 120 ° C. in the present embodiment). Have been. The heating mechanism 50
Is fixed to the transfer roll mechanism 40,
The moving means 43 can move in the horizontal and vertical directions together with the transfer roll mechanism 40.

Further, the winding mechanism 60 includes a pair of driving rolls 63 for driving the transfer sheet S guided from the unwinding roll 11 through the auxiliary roll 12, the peeling roll 21, the auxiliary roll 61, and the auxiliary roll 62. 63, and a winding roll 64 for winding and collecting the transfer sheet S to which the color filter layer S2 has been transferred. Note that the pair of drive rolls 63, 63 are rotationally driven in opposite directions (in the direction of the arrow in the drawing) by a drive source M4 such as a motor. The transfer sheet S is transported in the direction of the mechanism 60. The take-up roll 64 is rotatably connected to a drive source M5 such as a motor.

Below the glass panel P, a panel heating means 70 for heating the glass panel P to a predetermined temperature, for example, 40 to 45 ° C., is provided. Consists of
The panel heating means 70 heats the glass panel P in advance before the transfer process, so that when the roll surface R of the transfer roll 42 is pressed against the transfer surface P1a, the roll surface R
Is prevented from instantaneously lowering and causing transfer failure.

Next, FIG.
The processing operation of the coating apparatus will be sequentially described with reference to FIGS. First, FIG. 1 described above shows the state of the coating apparatus in a standby state in which the transfer operation to the glass panel P is not performed, that is, the transfer processing to the previous glass panel P is completed, and the transfer to the next glass panel P is performed. This shows the state of the coating apparatus immediately before starting the processing. In FIG. 1, the glass panel P on which the transfer process has been performed previously has been replaced in advance by a worker, a transfer robot, or the like with a glass panel P on which the transfer process is to be performed next.

In the standby state shown in FIG. 1, the first sheet presser 31 and the second sheet presser 32 are both held in a state of being separated from the glass panel P (up position).
Therefore, the transfer sheet S above the glass panel P is separated from the glass panel P. Further, the transfer sheet S is in a state where an appropriate tension (tension) is applied by the driving source M4 of the driving rolls 63, 63. In this standby state, the transfer sheet S above the glass panel P is a portion where the transfer process to the previous glass panel P has been performed, and the color filter layer S2 is partially adhered.

Further, in the state shown in FIG.
Since the transfer roll 42 is constantly rotated by the driving source M3, the heat from the heating mechanism 50 is uniformly applied to the roll surface R of the transfer roll 42, and the roll surface R of the transfer roll 42 is constantly uniformly heated to a predetermined temperature. It is designed to hold. Further, since the transfer roll 42 is constantly rotating, the second sheet presser 32 is retracted to a position avoiding the rotation radius of the transfer roll 42.

Next, when the transfer process is started from the state shown in FIG. 1, first, the driving sources M1, M2, M4, and M5 are driven, and the protection sheet S3 of the untransferred transfer sheet S is removed. While being peeled off by the protection sheet peeling mechanism 20, the untransferred transfer sheet S is conveyed rightward in FIG.
Is located above the glass panel P. Thereafter, the rotation of the transfer roll 42 stops at the rotation position in FIG. 3, that is, at the rotation position where the linear edge portion E1 of the transfer roll 42 is located at the lowermost end.

Then, the second sheet presser 32 is moved leftward in FIG. 1 by horizontal moving means and elevating means (not shown), and the leading end of the presser portion 32a of the second sheet presser 32 is moved near the start end of the transfer surface P1a. After being located at (near the right end), the second sheet presser 32 is lowered, and a part of the transfer sheet S is brought close to the start end (right end) of the transfer surface P1a.
The state shown in FIG. However, at this time, there is a slight gap between the transfer sheet S and the transfer surface P1a, and the transfer sheet S is not in contact with the transfer surface P1a.

Next, from the state shown in FIG.
When the first sheet presser 31 further moves down, the transfer sheet S is brought closer to the transfer surface P1a by the tip of the presser portion 31a of the first sheet presser 31, and as a result, the transfer surface P1
The transfer sheet S comes close to the entire area of a. Then, subsequently, the transfer roll mechanism 40 and the heating mechanism 50 are lowered by the moving means 43. As a result, the edge E1 of the transfer roll 42 presses the transfer sheet S against the start end of the transfer surface P1a with a predetermined pressure.
(B).

The roll surface R of the transfer roll 42 is heated to a predetermined temperature (for example, 110 to 120 ° C.), and at this predetermined temperature, the adhesion between the base sheet S1 and the color filter layer S2 is reduced. Also, the transfer sheet S is set so that the adhesion between the color filter layer S2 and the transfer surface P1a increases. Therefore, the transfer of the color filter layer S2 to the transfer surface P1a is ensured.

Further, the straight edge portion E of the transfer roll 42
1, the transfer sheet S is pressed against the start end of the transfer surface P1a with a predetermined pressure, so that the adhesion of the color filter layer S2 to the start end of the transfer surface P1a is further ensured. For this reason, a transfer surface P of a transfer sheet S described later is used.
At the time of peeling from the transfer surface 1a, the transfer boundary line at the start end of the transfer surface P1a is substantially straight, and transfer failure is prevented.

Next, from the state shown in FIG.
By operating the clutch mechanism C, the drive shaft M
The transmission of the rotational driving force to the transfer roller 1 is stopped, and the transfer roll 42 is set in a rotatable state. In this state, the transfer roll mechanism 40 and the heating mechanism 50 are moved leftward on the paper by the moving means 43, so that the transfer roll 42 is moved to the transfer surface P1a.
The transfer sheet S is pressed against the transfer surface P1a while rolling upward. Then, through the state shown in FIG.
(D), that is, when the linear edge portion E2 of the transfer roll 42 is located at the end (left end) of the transfer surface P1a, the rolling of the transfer roll 42 is temporarily stopped. Thereby, the color filter layer S of the transfer sheet S
2 is transferred to the transfer surface P1a in order from right to left on the paper.

While the transfer roll 42 is rolling, a constant downward force is always applied to the transfer roll 42 by the moving means 43.
Is pressed against the transfer surface P1a by a constant pressing force.

Further, at any point during the transfer roll 42 rolling, for example, the transfer surface P
Immediately before the rotation of the transfer roll 42 temporarily stops at the end of 1a, the drive source M to the drive rolls 63, 63
The transmission of the driving force of No. 4 is stopped, and the application of the tension to the transfer sheet S is stopped.

This is because, if the tension is continuously applied to the transfer sheet S, the transfer sheet S is instantaneously peeled off after the completion of the transfer, resulting in poor transfer. Note that, as described later, it is preferable to perform the peeling operation of the transfer sheet S after a predetermined time has elapsed after the transfer operation to the transfer surface P1a. By doing so, the adhesion between the color filter layer S2 and the transfer surface P1a increases during the above-mentioned predetermined time, so that good transfer can be performed.

Here, in the state shown in FIG. 3D, the cover portion 31b of the first sheet presser 31 is formed so as to be longer in the left direction than the left end of the heat insulating cover 51 of the heating mechanism 50. I have. This is because the transfer roll mechanism 40
In addition, the radiant heat from the heating mechanism 50 hits the untransferred transfer sheet S, and the adhesion between the base sheet S1 of the transfer sheet S and the color filter layer S2 increases, resulting in poor transfer during the next transfer process. This is to prevent it.

Next, after the transfer roll 42 has rolled to the end position shown in FIG. 3D, the transfer roll mechanism 40 and the heating mechanism 50 are moved by the moving means 43 in the direction opposite to the previous rolling direction. After returning by a predetermined distance in the direction (rightward in the figure), the state shown in FIG. 4E is obtained. That is, the transfer roll 42 rolls by a predetermined distance in the reverse direction near the rolling end portion, and performs the transfer processing operation again only near the rolling end portion. As a result, the color filter layer S2 is transferred to the transfer surface P1a near the rolling end.
Of the transfer sheet S, which will be described later, when the transfer sheet S is separated from the transfer surface P1a.
The transfer boundary line at the end of is substantially straight, and poor transfer is prevented.

Thereafter, from the state shown in FIG. 4E, the transfer roll mechanism 40 and the heating mechanism 50 are raised by the moving means 43 to the state shown in FIG.
It returns to the same position as the standby state shown in FIG. At the same time, the first sheet presser 31 and the second sheet presser 32 also rise and retract, and return to the same position as the standby state shown in FIG. After that, the driving rolls 63 and 6 are again
3 imparts tension to the transfer sheet S, whereby the transfer sheet S that has been in close contact with the transfer surface P1a is transferred to the transfer surface P1a as shown in FIG.
Are peeled off from both sides (left and right directions on the paper surface) of the start end and the end end.

Here, the reason why such a peeling operation is performed will be described. For example, the transfer sheet S which is in close contact with the transfer surface P1a is peeled in one direction from the start end to the end of the transfer surface P1a. In such a case, since the last peeled portion is the end of the transfer surface P1a, the color filter layer S2 outside the region of the transfer surface P1a is peeled, and the transfer boundary line at the end of the transfer surface P1a is disturbed. Resulting in an indeterminate curve,
Improper transfer occurs. However, when the peeling operation is performed as in the present embodiment, since the last peeled portion is near the center of the transfer surface P1a, the transfer boundary lines at the start and end thereof are straight without being disturbed. Good transfer becomes possible.

Next, after the peeling operation shown in the middle of FIG. 4G is completed, the coating apparatus enters the standby state shown in FIG. Can do that. After such a transfer processing operation is repeated a plurality of times, when the number of the transfer sheets S wound on the unwinding roll 11 of the unwinding mechanism 10 decreases and the next transfer processing becomes impossible, the winding mechanism 60
All the transfer sheets S are taken up and collected by the take-up roll 64.

Here, as shown in the plan view of FIG. 5, the transfer sheet S that has been subjected to the transfer process is transferred to the transfer surface P1a, and the color filter layer S2 is eliminated, leaving only the base sheet S1. Transferred part 100
As a result, an untransferred portion 101 where the color filter layer S2 remains partially adhered in a stripe shape is formed. It is needless to say that the stripe width of the untransferred portion 101 should be as small as possible to improve the use efficiency of the color filter layer S2, but in the present embodiment, the transfer accuracy of the transfer sheet S ( The width is set to, for example, about 5 mm due to (transport position accuracy). However, the amount of the surplus resist in the untransferred portion 101 is much smaller than the surplus resist liquid scattered during the conventional rotation, and thus the consumption of the resist is greatly reduced. .

Finally, since the transfer sheet S collected by the winding mechanism 60 is subjected to a disposal process such as incineration, the cost required for the disposal process is reduced as compared with the related art. Alternatively, the base sheet S1 of the transfer sheet S
A color filter layer S2 is formed again on the protective sheet S
By covering with 3, the reproduction processing can be performed in a reusable form.

The glass panel P on which the transfer process has been completed
Is irradiated with ultraviolet rays, a predetermined filter pattern is exposed on the color filter film on the transfer surface, and subsequently, the color filter film is developed by a developer or the like. As a result of these processes, a filter pattern of a predetermined one of the three primary colors of light (for example, blue) is formed in the transfer surface P1a of the glass panel P.

The embodiment of the present invention has been described above, but the present invention can be embodied in other forms. For example, in the above-described embodiment, the transfer roll 42 is rotatable with respect to the rotation of the transfer roll 42, and the transfer roll 42 is transferred by the driving force of the transfer roll mechanism 40 and the heating mechanism 50 by the moving unit 43. It rolls on the surface P1a. However, conversely, the transfer roll mechanism 40 and the heating mechanism 50 are set in a movable state, and the transfer roll 42 is driven by the driving source M3.
The transfer roller 42 is transferred to the transfer surface P1a by the rotational driving force of
You may make it roll above.

In the above-described embodiment, the glass panel P is pre-heated by the panel heating means 70. For example, before the glass panel P is set in the coating apparatus, 40-4
The glass panel P may be heated by storing the glass panel P in a constant temperature room at about 5 ° C.

In the above-described embodiment, the rolling direction of the transfer roll 42 (the transfer direction to the transfer surface P1a).
Is the direction from the winding mechanism 60 side to the unwinding mechanism 10 side (from right to left in FIG. 1), and conversely, the direction from the unwinding mechanism 10 side to the winding mechanism 60 side (FIG. (From left to right on one page). However, the case of the above-described embodiment is more preferable because the transfer process can be favorably performed due to radiant heat applied to the transfer sheet S before the color filter layer S2 is transferred.

Further, in the above-described embodiment, a filter pattern of a predetermined one color (for example, blue) is formed on the panel, and particularly, the sharpness of the predetermined one color (for example, blue) is improved. However, the present invention is not limited to this. Even if the same series of transfer processing is performed again on the same panel to form a filter pattern of another color (for example, red or green), the sharpness of a plurality of colors may be improved. Good.

In the coating apparatus of one embodiment described above, a color filter is formed on a panel. For example, a black matrix portion is formed on a panel, and further, a phosphor is formed on a panel. May be used.

Further, the coating apparatus of the above-described embodiment transfers and coats a photosensitive resin (color filter) on a color CRT panel, but is not limited thereto. It can also be used to transfer and coat resins.

Further, the heating mechanism 50 of the above-described embodiment is used.
In the above, the roll surface R of the transfer roll 42 is heated by an infrared lamp 52 provided outside the transfer roll 42, but instead of the infrared lamp 52, heat is generated on a base 42a of the transfer roll 42 or the like. A heater may be built in to heat the roll surface R.

In addition, various design changes can be made within the scope of the matters described in the claims.

[0068]

As described above in detail, according to the apparatus for coating a color display panel with a photosensitive resin according to the first aspect of the present invention, a large amount of excess resist is not scattered. The resist consumption can be minimized, and if the collected transfer sheet is discarded by burning or the like, the cost required for the disposal can be reduced. Furthermore, there is an effect that the photosensitive sheet can be formed again on the base sheet of the collected transfer sheet to reproduce the transfer sheet. Further, since the roll surface of the transfer roll is heated to a predetermined temperature by the heating means,
The transfer of the photosensitive resin layer from the transfer sheet to the panel can be reliably performed by the action of heat.

According to the apparatus for coating a photosensitive resin on a color display panel according to the second aspect of the present invention,
If the two linear edges of the transfer roll are located at the start and end of the transfer surface of the panel, the transfer edge becomes substantially straight due to the action of the linear edge, and the transfer edge at the start and end of the transfer surface This has the effect of preventing improper transfer. Also, even when the folded portion is formed around the entire periphery of the panel, such as a panel for a color CRT of a color television, the straight edge portion may enter a position close to the folded portion of the panel. Therefore, the photosensitive resin can be transferred even at a position close to the folded portion of the panel, and the effect that the effective screen of the panel can be enlarged can be obtained.

According to the apparatus for coating a photosensitive resin on a color display panel according to the third aspect of the present invention,
Even if the face plate has a gentle spherical surface, such as a color CRT panel for a color television, the transfer roll's roll surface is deformed to follow the spherical surface of the face plate. This has the effect that the photosensitive resin can be transferred uniformly over the entire transfer surface.

According to the apparatus for coating a photosensitive resin on a color display panel according to the fourth aspect of the present invention,
Before the transfer sheet is pressed against the panel by the transfer roll, the transfer sheet is preliminarily brought close to the panel by the sheet proximity means, so that it is possible to prevent the occurrence of transfer failure due to the generation of wrinkles on the transfer sheet. It works

According to the apparatus for coating a color resin panel with a photosensitive resin of the invention according to claim 5,
The heat shielding unit prevents the transfer sheet before the photosensitive resin layer is transferred to the panel from being irradiated with radiant heat from a transfer roll or a heating unit, so that when transferring the photosensitive resin to the panel, the base sheet The effect is that the photosensitive resin layer can be satisfactorily separated from the resin layer and the occurrence of transfer failure can be prevented.

According to the method for coating a photosensitive resin on a color display panel according to the invention of claim 6,
Since the excess resist is not scattered in large quantities, it is possible to minimize the consumption of the resist, and if the collected transfer sheet is incinerated and discarded, the cost required for the disposal process Can be reduced. Furthermore, there is an effect that the photosensitive sheet can be formed again on the base sheet of the collected transfer sheet to reproduce the transfer sheet. Further, since the roll surface of the transfer roll is heated to a predetermined temperature by the heating means, the transfer of the photosensitive resin layer from the transfer sheet to the panel can be reliably performed by the action of heat.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a coating apparatus according to an embodiment of the present invention and a state where the coating apparatus is on standby.

FIG. 2 is a cross-sectional view illustrating a cross-sectional structure of a transfer sheet S used in a coating apparatus according to an embodiment of the present invention.

FIG. 3 is a state diagram showing operating states (a) to (d) of the coating apparatus according to one embodiment of the present invention.

FIG. 4 is a state diagram showing operating states (e) to (g) of the coating apparatus according to one embodiment of the present invention.

FIG. 5 is a plan view showing a state of a transfer sheet collected by a winding mechanism of the coating apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 unwinding mechanism 11 unwinding roll (sheet feeding means) 20 protective sheet peeling mechanism 30 sheet proximity mechanism 31 first sheet holding (sheet approaching means) 31a holding section 31b cover (heat shielding means) 32 second sheet holding (sheet) (Proximity means) 32a pressing part 32b cover part 40 transfer roll mechanism 41 rolling shaft 42 transfer roll 50 heating mechanism 51 heat insulating cover 52 infrared lamp (heating means) 60 winding mechanism 63, 63 drive roll 64 winding roll (sheet collecting means) 70) Panel heating means C Clutch mechanism E1, E2 Straight edge portion K Notch portion P Glass panel (panel) P1 Face plate P1a Transfer surface P2 Folded portion R Roll surface S Transfer sheet S1 Base sheet S2 Color filter layer (photosensitive resin) Layer) S3 protective sheet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01J 9/227 H01J 9/227 C // G03F 7/16 501 G03F 7/16 501 (72) Inventor Kato Hiroshi 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sonny Corporation (72) Inventor Koji Fujita 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sonny Corporation (72) Inventor Mikio Shoda Kyoto 4-chome Tenjin, Horikawa-dori-Terunouchi, Kamigyo-ku, Tokyo 1-1-1 Kitamachi Dai-Nihon Screen Manufacturing Co., Ltd. F-term (reference) 2H025 AA17 AB11 AB14 AB20 CC11 EA08 2H048 BA48 BA64 4D075 AC43 AC84 AC88 AC96 BB22X CA47 DA04 DB31 DC19 4F040 AA12 AB06 AC01 BA23 CB05 CB40 DB02 5C028 AA10 HH04 HH14 JJ03 JJ09

Claims (6)

[Claims] 1. A sheet supply means for supplying a transfer sheet comprising a base sheet and a photosensitive resin layer laminated on the base sheet, and the transfer sheet supplied from the sheet supply means rolls while being pressed against a panel. A transfer roll; heating means for heating a roll surface of the transfer roll to a predetermined temperature; and sheet collecting means for collecting a transfer sheet after the photosensitive resin layer is transferred to the panel by the transfer roll. An apparatus for coating a photosensitive resin on a color display panel. 2. The transfer roller according to claim 1, wherein a part of the roll surface of the transfer roll is cut out along a direction substantially parallel to a rolling axis of the transfer roll. For coating photosensitive resin on color display panels. 3. The apparatus for coating a color display panel with a photosensitive resin according to claim 1, wherein the roll surface of the transfer roll is formed of an elastic body. 4. The color display panel according to claim 1, further comprising sheet proximity means for bringing the transfer sheet close to the panel before the transfer roll presses the transfer sheet against the panel. Coating system for photosensitive resin. 5. A heat shielding means provided near the transfer sheet before the photosensitive resin layer is transferred to the panel, and for preventing the transfer sheet from being irradiated with radiant heat from a transfer roll or a heating means. The apparatus for coating a photosensitive resin on a panel for a color display according to any one of claims 1 to 4, characterized in that: 6. A transfer roll having a roll surface heated to a predetermined temperature and rolling the transfer roll while pressing a transfer sheet comprising a base sheet and a photosensitive resin layer laminated on the base sheet against a panel. A method for coating a photosensitive resin layer on a color display panel, comprising: coating a panel with a photosensitive resin layer; and collecting a transfer sheet after the photosensitive resin layer is transferred to the panel.