JPH095513A - Transfer device for color filter - Google Patents

Abstract

PURPOSE: To prevent a transfer film from shifting in position at the transfer and prevent deterioration in the positioning precision of a pixel due to the position shift by providing a transfer roller with a suction part which sucks the transfer film. CONSTITUTION: When the transfer film is transferred to a substrate, a copy of relief patterns 22 is obtained with pressure generated with a pressure roller 25 when a cylinder is moved down. The transfer roller 25 has suction holes 23 for fixing the transfer film formed between relief patterns 22. The transfer roller 25 has a suction chamber 24 provided in its transfer roller support 21, and the chamber is connected to the suction holes 23 through suction paths. Therefore as the roller 25 rotates, suction is started when a suction hole is connected to the suction chamber 24 and the transfer film is fixed. This mechanism fixes the transfer film onto the transfer roller 25 by suction only at a necessary angle of rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embossing transfer apparatus for manufacturing a color filter having colored pixels of a plurality of colors by using transfer films having different spectral characteristics on a support.

[0002]

2. Description of the Related Art As a manufacturing process of a liquid crystal color filter, various methods have been proposed in consideration of mass productivity and economical efficiency. Among them, a method in which a photosensitive resin is previously formed in a film shape as in Japanese Patent Laid-Open No. 63-187203, which is subsequently pressure-bonded by heat or the like and exposed and developed to obtain a colored pattern is proposed as a powerful method. Has been done. According to this method, since the coating film is formed in advance, the drying time at the time of coating is unnecessary, mass production adaptability is improved, and the photosensitive resin can be effectively used, which is economical. Rich However, the development process is still required, and further improvement centered on shortening the process has been desired. Among them, the “embossing transfer method” has been proposed as a powerful method. The “embossing transfer method” is a method of transferring a transfer roller having unevenness and directly transferring the transfer roller to a substrate to obtain a fine colored pattern, and does not require a developing step. Further, as the embossing transfer device for realizing this, the following devices have been proposed. A. A method in which a transfer film is superposed on a substrate, and then a transfer material is adhered to the substrate through an adhesive layer with a pressing die formed on the plate cylinder (JP-A-4-9903, "Embossing transfer method"). B. The transfer film is a continuous film, and the pressing die has a cylindrical shape for easy continuous production (Japanese Patent Laid-Open No. 4-1000).
No. 05, "Method for manufacturing color filter by transfer").

[0003]

However, the problem of relative alignment between pixels is still unresolved in any transfer device, and the quality of the color filters manufactured by the transfer device is insufficient. It was Therefore, the present invention is to provide a relatively good color filter transfer device between pixels without impairing the production efficiency of the transfer device.

[0004]

Specifically, as a first means, a transfer film supply unit, a substrate supply unit, a transfer unit for transferring the transfer film and the substrate to the substrate by a transfer roller, and In a transfer device for a color filter provided with a discharge part for discharging the transfer film and the substrate at the same time, a relief pattern of the color filter is formed on the transfer roller, and a suction part for sucking the transfer film is provided. A transfer device for a color filter is provided. As a second means, there is provided a transfer device for a color filter, characterized in that, in the above-mentioned transfer device, a substrate and a transfer roller are provided with a relative alignment mechanism in front of the transfer portion.

[0005]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of a color filter transfer device including the main structure of the present invention. It will be described below based on this. The transfer film 17 is set as a continuous roll in the supply unit 111 of this apparatus. The supply unit 111 has one roll, but if the production efficiency is further improved, an auto paster capable of setting a plurality of rolls and automatically connecting films may be used. The transfer film 17 is composed of at least a colored film uniformly formed on the support film. Discharge unit 1
Winding, which is 9, pulls the film from the transfer film supply. The transfer film 17 from the supply unit 111 reaches the inspection unit after passing through the first dancer roller 18 for tension control. The weight of the dancer roller 18 for tension control is set to 5 to 30 kilograms, and the tension is kept constant by changing the position of the dancer roller. That is, when the transfer film 17 is strongly pulled, the tension of the dancer roller is reduced and the dancer roller is lowered to the set value. On the contrary, when the transfer film is loosened, the dancer roller rises to increase the tension.

Then, it moves to the front of the CCD camera 114 of the inspection section. Although not shown here, prior to the inspection, it is advantageous in terms of yield by blowing air onto the transfer film from both sides with a dust remover to remove dust, dirt, and the like. At this time, if a defective portion is detected, the defective transfer film is not transferred and is discharged as it is based on the position data. The transfer film 17 is a second dancer roller 18 'for transfer onto the glass substrate 13 for the color filter.
Move to. At the same time, the glass substrate 13 is supplied from the substrate supply unit, and both are pressed by being sandwiched between the transfer roller 11 and the pressing roller 12 having the relief pattern of the uneven pixels in the transfer unit. Glass substrate 1 forming a color filter
The substrate 3 is heated by the substrate heating unit 16 from the upper and lower surfaces to 80 to 90 degrees. Generally, when the transfer film 17 is heated at a high temperature, it stretches and it becomes difficult to adjust the tension. Therefore, if preheating is performed, 50 ° C. or less is desirable. The glass substrate may be separately heated by providing a heating unit in the pressing roller 12 so that the temperature of the heated glass substrate does not change.

The relative alignment between the substrate and the relief pattern formed on the transfer roller is performed as follows. FIG. 3 shows a substrate 32 and a transfer roller 3 according to an embodiment of the present invention.
7 is a view showing main components of an alignment device with a constant relief pattern formed on the surface 6. In FIG.
The substrate 32 is transported by the transport rollers 33, and at this time, the pre-alignment operation is simultaneously performed. That is, the "he" -shaped swing plate 3 which is the first positioning member in the left-right direction.
By swinging 1 in a direction orthogonal to the traveling direction of the substrate 32, the position of the substrate is roughly adjusted. The substrate 32 for which pre-alignment has been completed is temporarily stopped by a stopper 35 which is a positioning member in the ascending forward direction.
After that, the controller that inputs the first timing signal from the rotary encoder 37 synchronized with the rotation of the transfer roller 36 and the timing signal from the timing sensor 34 that detects the edge of the substrate causes the transfer roller 36 and the substrate 32 to be separated from each other. When the timing of superimposing is taken, the stopper 35 descends and the substrate 32 starts moving toward the transfer roller 36.

Next, the transfer section will be described with reference to FIG. FIG. 2A is a front view of the transfer portion. FIG. 3B is a sectional view taken along the line AA of the transfer portion, and FIG. 3C is a view showing a relief pattern for “R” in the case of a mosaic type formed on the transfer roller. The center shown in FIG. 2A is a relief pattern for "R" as a die-pressing portion. When the transfer film is transferred to the substrate, the cylinder shown in FIG. 2A descends, and the relief pattern is transferred by the pressure generated between the transfer film and the pressing roller. Since the relief pattern has a size used for a color filter, the size of one pixel is about 100 μm. The height of the relief is usually desired to be about 10 to 50 μm, but it is appropriately changed according to the thickness of the transfer film.

At the same time, a suction port for fixing the transfer film is formed in the transfer roller between the relief patterns. FIG. 2B shows a cross section taken along the line AA ′ of the transfer roller of FIG. The transfer roller 25 is provided with a suction chamber 24 in the fixed transfer roller support 21 and is connected to the suction port 23 via a suction path. Therefore, when the transfer roller 35 rotates, suction is started when the suction port 23 and the suction chamber 24 are connected, and the transfer film is fixed. With such a mechanism, the transfer film is fixed on the transfer roller by suction only when it reaches a required rotation angle.

After the pixel pattern is transferred onto the substrate by the transfer roller shown in FIG. 2, the substrate is moved to the discharging section. That is, in FIG. 1, the transferred film 111 is wound around the support film winding portion 19 through the fourth dancer roller 18 ″ ′, and the color filter substrate 13 is formed with the colored layer 14 and is discharged from the discharge port. As a result of forming a color filter on a substrate using this color filter transfer device, not only was it possible to efficiently produce a color filter with high relative positional accuracy between pixels, but also a color liquid crystal display device using this color filter. The image quality was excellent.

[0011]

According to the first aspect of the present invention, the transfer film is fixed by the suction device formed on the transfer roller,
It is possible to prevent the transfer film from being displaced during transfer. Therefore, it is possible to prevent deterioration of the pixel alignment accuracy due to this shift. In the second aspect of the invention, the substrate is guided to a predetermined position in advance to realize relative alignment with the relief pattern formed on the transfer roller.

[Brief description of drawings]

FIG. 1 is a diagram showing a transfer device for a color filter including a main configuration of an embodiment of the present invention.

FIG. 2 is a front view (a) of a transfer roller according to an embodiment of the present invention, a cross-sectional view (b) taken along line AA ′ of the transfer roller, and an example of a relief pattern formed on the transfer roller. (C)

FIG. 3 is a diagram showing an example of an apparatus for performing relative alignment between a substrate and a relief pattern on a transfer roller.

[Explanation of symbols]

 11 Transfer Roller 12 Pressing Roller 13 Substrate 14 Pixel 15 Stopper 16 Substrate Heating Part 17 Transfer Film 18 First Dancer Roller 18 'Second Dancer Roller 18 "Third Dancer Roller 18"' Fourth Dancer Roller 19 Ejection Part (Winding Device) 110 Transfer Film Discharge unit (winding device) 111 Transfer film supply unit 112 First nip roller 112 'Second nip roller 113 Peeling roller 114 Inspection camera 115 Inspection illumination diffuser plate 116 Inspection light source 21 Transfer roller support 22 Relief pattern 23 Suction port 24 Suction Chamber 25 Transfer roller 31 Swing plate 32 Substrate 33 Roller 34 Sensor 35 Stopper 36 Transfer roller 37 Positioning mechanism including rotary encoder

Claims (2)

[Claims] 1. A color filter provided with a transfer film supply unit, a substrate supply unit, a transfer unit for transferring the transfer film and the substrate to the substrate by a transfer roller, and a discharge unit for simultaneously discharging the transfer film and the substrate. The transfer device for a color filter, wherein a relief pattern of a color filter is formed on the transfer roller, and a suction unit for sucking the transfer film is provided. 2. The transfer device for a color filter according to claim 1, wherein the transfer device is provided with a relative positioning mechanism for the substrate and the transfer roller in front of the transfer portion.