JPH06109913A - Production of color filter - Google Patents

Abstract

PURPOSE:To obtain a production method of color filters with good productivity to control the spectroscopic characteristics with high precision. CONSTITUTION:A red pattern printing film (R), green pattern printing film (G) and blue pattern printing film (B) are formed by successively applying printing inks having higher content of coloring pigment on the picture element on a glass substrate 1. In this case, these printing films are formed so that the end of each film overlap with adjacent films to form 10mum overlap width. Then the films are heated to harden to obtain a color filter having color filter layers consisting of each printing films. By successively applying printing inks in an order from an ink having higher content of color pigment, and then the printing films are heated to harden, so that the changes of film thickness cheked by sampling during printing can be almost same. Thus, the film thickness and spectroscopic characteristics of filter layers of the color filter produced can be exactly estimated according to the result of sampling check.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a color filter by using a printing ink for each color containing a coloring pigment and a resin as main components, and more particularly to productivity capable of accurately controlling its spectral characteristics. The present invention relates to a good color filter manufacturing method.

[0002]

2. Description of the Related Art A color filter applied to a liquid crystal display such as a color display, a color video camera, a color input / output device, a solid-state image pickup device, or the like is provided at each pixel portion on a transparent substrate such as glass and transmits a plurality of transmitted lights. A color filter layer for coloring colors (usually, three colors of red R, green G and blue B) is provided, and a color image is constituted by transmitted light of each color colored by the action of this color filter layer. .

By the way, as a conventional method for producing this color filter, for example, a dyeing method, a printing method, an electrodeposition method,
Various methods such as a pigment dispersion method using a photocrosslinkable colored varnish and a pigment dispersion method using a photopolymerizable colored varnish are known.

Among these manufacturing methods, the above-mentioned printing method has the advantages that the manufacturing process is simple and the productivity is high and the manufacturing cost is low as compared with other manufacturing methods. For example, red, green, The color filter provided with the blue color filter layer is manufactured through the following steps.

First, a blue printing film containing a blue pigment and a resin as main components is printed on a blue pixel portion on a transparent substrate such as a glass substrate to form a blue printing film, and then a green printing ink is used. A green printing film is formed by printing on the green pixel portion. In this case, the green print film is printed so that its end portion and the end portion of the blue print film adjacent thereto overlap.
Next, a red printing film is formed by printing with a red printing ink so that the end portion of the pixel portion of the red color and the edge portions of the blue printing film and the green printing film adjacent thereto are overlapped. The above-mentioned color filter in which a color filter layer for each color is formed at each pixel portion is manufactured by heating and fluidizing an iso-printing film to flatten the surface and harden it.

By the way, the spectral characteristics of the color filter layer differ depending on the printing conditions and also change due to the shrinkage or deformation of the printing film due to the heat treatment. Therefore, usually, each time the first color is printed (normal printing is started). ) One or a few transparent substrates are taken out as a sample, and this sample is heated and hardened at a temperature condition that is milder than the heat hardening treatment of the color filter but can reflect its shrinkage and deformation. A method is adopted in which the printing characteristics are processed, the spectral characteristics are measured, and the printing conditions are appropriately adjusted based on the measurement result.

That is, while printing the first color blue printing ink on the pixel portion, the transparent substrate at the beginning of printing is taken out, the printed film is subjected to a heat hardening treatment, its spectral characteristics are measured, and the measured spectrum is measured. If the characteristics are the desired ones, printing is continued under the printing conditions, and if the characteristics are different from the desired ones, the printing conditions are adjusted appropriately and the sampling inspection is performed again. In addition, regarding the printing of the second color green printing ink, at the pixel portion of the transparent substrate on which the first color blue printing film is formed (in this case, the heating and hardening treatment of the blue printing film has not been performed yet). While printing the green printing ink, pull out the transparent substrate at the beginning of printing, subject the blue printing film and the green printing film to heat hardening treatment, and measure the spectral characteristics.
The printing conditions were adjusted appropriately based on the measurement results. Further, with respect to the third color red printing ink, similarly, the red printing ink is printed on the pixel portion of the transparent substrate on which the blue printing film and the green printing film are formed to form the red printing film, and the same sampling inspection is performed. It was

[0008]

By the way, although the cross-sectional shape of each printed film after printing is mountain-shaped, the cross-sectional shape is likely to change due to the difference in fluidization conditions during the heat treatment.

That is, in the sampling inspection of the blue print film of the first color, since the print film adjacent to this print film does not yet exist, the print film is fluidized during the heat treatment and is not processed. The cross-sectional shape of the printed film in Fig. 2 maintains a mountain shape, and the film thickness hardly changes.

On the other hand, in the manufactured color filter, the above-mentioned heat hardening treatment is applied to the three-color printed films formed so that the end portions adjacent to each other overlap each other. Is more likely to be flattened due to the effect of fluidization of the green print film and the red print film adjacent to this, compared to during the above sampling inspection, and the film thickness of the blue print film after the heat hardening treatment is the above Lower than at the time of inspection.

As described above, the change in film thickness of the blue print film of the first color is different between the sample at the time of the sampling inspection and the color filter at the time of manufacturing. Therefore, in the conventional manufacturing method, the spectral characteristics of the color filter are changed. There was a problem that could not be managed accurately.

Similarly, for the second color green printing film,
At the time of the sampling inspection, only one end of this green printed film is adjacent to the blue printed film of the first color, and the film thickness change is different from that during the heat hardening treatment after the three-color printing. Therefore, there is a problem in that the spectral characteristics cannot be accurately controlled.

The present invention has been made by paying attention to such a problem, and an object thereof is to change the film thickness of the printing film during the heating and hardening treatment after full-color printing and heating of the sample. Substantially match the change in film thickness after hardening treatment,
It is an object of the present invention to provide a method for manufacturing a color filter that enables accurate control of spectral characteristics by adjusting printing conditions based on inspection of the sample.

[0014]

Under the above technical background, the inventors of the present invention have made earnest studies to achieve the above object, and have found the following.

That is, the content of the pigment mixed in the printing ink of each color varies depending on the color in consideration of the white balance of the color filter and the display effect.
According to the study by the present inventor, it has been found that the change in the film thickness of the print film during the heat hardening treatment after full-color printing depends on the content of the pigment contained in each print film.

A color filter provided with three color filter layers will be described below as an example. Although the change in film thickness of the print film having a high pigment content is small in the heat hardening treatment after three-color printing. On the other hand, the change in film thickness of the print film having a low pigment content is large. Therefore, when the printing ink with the highest pigment content is printed first, the change in film thickness of the print film of the first color is small even in the heat hardening treatment after three-color printing, and the change in film thickness Almost the same as the result of the first color sampling inspection.

When the printing ink having the second highest pigment content is printed in the second color, the result is similar to the case of the first color printing ink, which almost coincides with the result of the sampling inspection of the second color.

In the sampling inspection of the third color, the transparent substrate on which the printing films of the three colors are formed is subjected to the heat hardening treatment, so that it is almost the same as the heat hardening treatment after the three-color printing. As a result, the measurement result of this sampling test and the result of the heat-hardening treatment of the above color filter are almost the same regardless of the pigment content of the third color printing ink.

The present invention has been made based on such knowledge.

That is, the invention according to claim 1 uses a printing ink for each color mainly composed of a color pigment and a resin so that adjacent pixel portions for each color overlap each pixel portion on the transparent substrate. After forming the print film for each color that forms the color filter layer by sequentially printing on, the heat treatment is applied to flatten the surface of each print film and harden it to form the main part of the color filter layer and the transparent substrate. On the premise of the method for producing a color filter having the above-mentioned constitution, the above-mentioned printing film for each color is formed by sequentially printing from a printing ink having a high content ratio of a coloring pigment.

[0021] In such technical means, the order in which the content of the color pigment is high means that the amount of change in film thickness of the printed film due to the heat hardening treatment is caused when the heat hardening treatment is carried out after full-color printing. Match in ascending order.

Since the change in the film thickness in the sampling inspection of the first color printing ink is small, when the printing ink having the highest content of the color pigment is set as the first color, the heat hardening treatment after the full color printing is performed. The amount of change in film thickness of the printed film and the amount of change in film thickness of the printed film in the sampling inspection are substantially equal. Therefore, the thickness of the color filter layer (printing film) of the first color of the color filter and the spectral characteristics can be predicted from the result of the sampling inspection, and the spectral characteristics of the first color filter layer can be easily managed. Becomes
In addition, in order to achieve the white balance of the color filter,
The printing ink with the highest content of color pigments is usually the red printing ink.

Further, when the printing ink having the second highest content of the color pigment is used as the second color, the change amount of the thickness of the printing film due to the heat hardening treatment after the three-color printing and the printing film in the sampling inspection. The amount of change in film thickness is similar. Therefore, it is possible to predict the film thickness and the spectral characteristic of the color filter layer for the second color based on the result of the sampling inspection, so that it becomes easy to manage the spectral characteristic of the color filter layer for the second color. The printing ink having the second highest content of the color pigment is usually a green printing ink.

When the printing ink having the lowest content of the coloring pigment is printed last, the sampling inspection and the heat-hardening treatment after full-color printing are almost the same, so the sampling inspection is measured. The result and the result of the heat-hardening treatment of the color filter are substantially in agreement. Therefore, the film thickness and the spectral characteristic of the last color filter layer can be predicted by the result of the sampling inspection, and the management of the spectral characteristic becomes easy. The printing ink having the lowest content of the color pigment in the color filter forming the three-color color filter layer is usually a blue printing ink.

If the content of the color pigments in the two types of printing ink is the same among these printing inks of a plurality of colors, either one may be printed first.

Next, the flow of the printing ink during the heat-hardening treatment after all-color printing and the spread thereof cause the shape of the printing film having the mountain-shaped cross section immediately after printing to collapse, and the entire coating of the color filter layer becomes flat. Turn into. At this time, when printing is performed in the order of the printing inks with the low pigment content, the printing film with the low pigment content that was printed first fluidizes to fill the valleys between the printing films, and the printing that is printed later. There is an adverse effect that the film spreads on the previously printed printing film to widen the image line width, resulting in a decrease in color purity of the color filter layer, and unevenness on the surface of the printing film (color filter layer). On the other hand, when printing is performed in the order of printing inks with a high content of color pigments, the above-mentioned print film does not spread and the desired film thickness and image width are maintained (a print film with a low pigment content is heated. At the time of hardening treatment, the print line having a high pigment content tends to receive the pressure of the print film and the image line width tends to be narrowed.) Therefore, the entire print film (color filter layer) can be flattened. .

When flattening the entire color filter layer as described above, when each printing ink contains a fluorosurfactant, the coating film of these printing inks is sufficiently collapsed to form a color filter layer having a uniform and sufficiently flat surface. Can be formed.

The invention according to claim 2 is based on such a technical reason.

That is, the invention according to claim 2 is claim 1
On the premise of the method for producing a color filter according to (1), the printing ink contains a fluorine-based surfactant.

Fluorine-based surfactants applicable to this are perfluoroalkylsulfonic acid salts,
Examples include perfluoroalkyl quaternary ammonium iodide, perfluoroalkyl polyoxyethylene ethanol, fluorinated alkyl esters, and the like.

Next, in this technical means, at the time of the above-mentioned heat hardening treatment, the top of the mountain shape of the printed film collapses and the valleys are filled so that the surface of the color filter layer is flattened. It is desirable that the printed film is formed so that its end overlaps with the end of another printed film adjacent to each other with a width of 1 to 40 μm.

The invention according to claim 3 is based on such a technical reason.

That is, the invention according to claim 3 is claim 1
Or on the premise of the method for manufacturing a color filter according to 2,
It is characterized in that the printing is sequentially performed so that the end portions adjacent to each other of each print film overlap each other with a width of 1 to 40 μm.

In the invention according to claim 3, when the adjacent end portions of each print film are printed so as to overlap each other with a width of 1 μm or more, the print film is subjected to the heat hardening treatment after full-color printing. The top of the mountain shape collapses and the valleys between the adjacent print films are filled, so that the entire surface is uniformly flattened. On the other hand, when the adjacent edges of each print film are printed so as to overlap each other with a width of less than 1 μm, the amount of printing ink collapsing from the top of the chevron shape of the print film is small, and the above valley is filled. Therefore, there is an adverse effect that unevenness having the valley portion as a concave portion is formed on the surface of the color filter layer.

On the other hand, if the width of the overlapping portion exceeds 40 μm, the non-overlapping portion, that is, the area of the display screen becomes small, which causes a problem that the entire screen becomes dark.

Next, the color pigments applicable in the inventions according to claims 1 to 3 are red, green, and
Blue organic pigments are preferable, and specific examples thereof include the following C.I. I. (Color Index) The numbered pigments are listed. In addition, "15: 1" in the following blue pigment means C.I.
I. No. 15 blue pigment, and C.I. I. 1 shows a mixture of number 1 blue pigments.

Red pigments; 97, 122, 149, 168, 177,
180, 192, 215 Green pigments; 7, 36 Blue pigments; 15, 15: 1, 15: 4, 15: 6, 22, 60, 64 In addition, these coloring pigments improve the fluidity of printing inks and colors. In order to improve the spectral transmittance and contrast of the filter, it is desirable to apply it after subjecting it to fine particles or surface treatment.

On the other hand, the resin applicable to the resin component of the printing ink may be any resin as long as the printing film (color filter layer) after the heat hardening treatment is compatible with the manufacturing process such as liquid crystal display, and it can be used, for example. Examples of the base polymer include acryl, epoxy, polyester, polyvinyl alcohol, polystyrene, copolymers thereof, polyamide resin, alkyd resin and the like. In addition, low molecular weight epoxy resin, melamine resin,
Alternatively, a mixed resin in which a small amount of melamine resin is added to a low molecular weight epoxy resin can be used.

It is also possible to mix various dispersants, coupling agents and the like into the respective printing inks.

In the inventions according to claims 1 to 3, the printing method of these printing inks is screen printing,
A method such as letterpress printing, lithographic printing, or intaglio printing can be applied, but intaglio printing or intaglio offset printing which is excellent in both image reproducibility and ink transfer property is preferable. Furthermore, the intaglio offset printing is particularly desirable in that printing can be performed with a printing pressure that does not damage a transparent substrate such as a glass substrate, and the precision required for a color filter is taken into consideration.

Next, a glass substrate can be exemplified as the transparent substrate that can be used in the invention according to claims 1 to 3. A structure may be provided on the transparent substrate, such as a liquid crystal display, which has a light-shielding film at a portion between pixels for preventing light transmission through a portion other than pixels constituting a screen to improve contrast of the screen.

At this time, it is preferable to provide an overlapping region of adjacent end portions of each print film on the light-shielding film, because the overlap portion of each print film does not directly affect the display image. The invention according to claim 4 is made for such a technical reason.

That is, the invention according to claim 4 is based on the method for manufacturing a color filter according to claim 1, 2 or 3, and uses a transparent substrate provided with a light-shielding film in an inter-pixel portion, and this light-shielding is applied. It is characterized in that an overlapping region of adjacent end portions of the printed film is provided on the film.

The light-shielding film is provided in various shapes such as a lattice pattern, a stripe pattern, a circular pattern, a polygonal window opening (pixel) pattern, etc., depending on its use. And it is also possible to provide it by a printing method like the color filter layer. However, when importance is attached to the accuracy of the line width, a photolithography method is preferable in which a photosensitive resin mixed with a light-shielding pigment is applied, exposed and developed to form the pattern.
Examples of the light-shielding pigment include carbon black,
A carbon black surface-treated to improve dispersibility, a sulfide such as bismuth sulfide, a lower metal oxide, a mixture of organic pigments, or a mixture of these or these light-shielding pigments is surface-treated with a resin. Or, or
Fine particles can be applied. Further, as the above-mentioned photosensitive resin, for example, acrylic, acrylic epoxy, epoxy, polyester, polyvinyl alcohol, polystyrene, or those having a copolymer thereof as a base polymer can be applied. Further, a light-shielding metal thin film such as chromium may be used as the light-shielding film.

In the color filters of the inventions according to claims 1 to 4, the color filter layer surface may be polished to further improve its flatness, or an overcoat layer or an overcoat layer may be formed on the color filter layer. A transparent electrode may be provided and used. The above-mentioned overcoat layer or transparent electrode is selected by appropriately adjusting its refractive index, film thickness, resistance value or dielectric constant in consideration of its liquid crystal display quality.

[0046]

According to the first aspect of the present invention, the printing film forming the color filter layer for each color is formed by printing sequentially from the printing ink having a high content of the coloring pigment, and heating after printing all colors is performed. The amount of change in the thickness of each printed film due to the hardening treatment,
Since the amount of change in the film thickness during the sampling inspection during printing of each printed film can be adjusted to be approximately the same, the film thickness and spectral characteristics of each color filter layer of the color filter to be manufactured can be accurately determined based on the measurement results of the sampling inspection. It is possible to predict.

According to the second aspect of the present invention, the printing ink contains a fluorine-containing surfactant, and when heat hardening treatment is performed after full-color printing, the peaks of the chevron shape of the printing film are It is possible to easily form a color filter layer having a flat surface because it is sufficiently collapsed to uniformly fill the valley portion between the adjacent print films.

On the other hand, according to the third aspect of the present invention, the printed films are sequentially printed so that the adjacent end portions of the printed films overlap each other with a width of 1 to 40 μm. When processed, the mountain-shaped top of the printed film collapses and a sufficient amount of printing ink is supplied to the valleys between adjacent printed films, so that a color filter layer having a flat surface can be easily formed.

Further, according to the invention of claim 4, a transparent substrate having a light-shielding film provided in a portion between pixels is applied, and
On the light-shielding film, the overlapping regions of the adjacent end portions of the printing films are provided, and the influence of the overlapping portions of the printing films does not affect the display image, so that the image quality can be improved.

[0050]

Embodiments of the present invention will now be described in detail with reference to the drawings.

First, as shown in FIG. 1 (A), the thickness 1.1
A red ink (made by Toyo Ink Mfg. Co., Ltd .; trade name SMXCFSME red 41D ink) using a mixed resin of a low molecular weight epoxy resin and a low molecular weight melamine resin as a vehicle on a glass substrate 1 of mm by the intaglio offset printing method. A printed film (R) having a pattern was formed.

The mixing ratio of the resin component and the color pigment of this red ink was 2.3: 1.

Then, one sheet was taken out from the beginning of printing, heat-treated at 220 ° C. for 30 minutes, and its spectral characteristics were measured. As a result of this measurement, the spectral characteristics were within specifications, so printing was continued without adjusting the printing conditions.

Next, as shown in FIG. 1 (B), a green printing ink (manufactured by Toyo Ink Mfg. Co .; SMXCFSM) was formed on the glass substrate 1 on which the red pattern printing film (R) was formed.
E green 55EH ink) and the edge portion of the red pattern printed film (R) is 10 by intaglio offset printing.
Printing was performed so as to overlap with each other with a width of μm to form a green pattern printing film (G).

The mixing ratio of the resin component and the color pigment of this green ink was 2.9: 1.

In the same manner, one sheet was taken out from the beginning of printing, heat-treated, and its spectral characteristics were measured. As a result of this measurement, the spectral characteristics were within specifications, so printing was continued without adjusting the printing conditions.

Finally, as shown in FIG. 1C, a blue printing ink (Toyo Ink Mfg. Co., Ltd.) was formed on the glass substrate 1 on which the red pattern printing film (R) and the green pattern printing film (G) were formed. ) Manufactured by SMXCFSME blue 31EH ink) and printed by intaglio offset printing so that the edges of the red pattern printing film (R) and the green pattern printing film (G) overlap each other with a width of 10 μm. A printed film (B) having a pattern was formed.

The mixing ratio of the resin component and the color pigment of this blue ink was 7.5: 1.

In the same manner, one sheet was taken out from the beginning of printing, heat-treated, and its spectral characteristics were measured. As a result of this measurement, the spectral characteristics were within specifications, so printing was continued without adjusting the printing conditions.

Next, the glass substrate 1 formed so that the end portions of the printed films (R), (G) and (B) overlap each other with a width of 10 μm is heated at 220 ° C. for 2 hours. Then, a color filter was applied. At this time, the cross-sectional shapes of the green pattern print film (G) and the blue pattern print film (B) that form a part of the color filter layer are changed from a shape indicated by a broken line to a solid line as shown in FIG. The shape changed.

The film thickness and the spectral characteristic of the color filter layer for each color of the color filter thus manufactured were measured. The film thickness and the spectral characteristics are shown in Table 1 below together with the results of the sampling inspection. The spectral characteristics of each are
The red color filter layer was evaluated by the transmittance of light having a wavelength of 610 nm, and the green and blue color filter layers were evaluated by the transmittance of light having a wavelength of 540 nm and 450 nm, respectively.

As a comparative example, three glass substrates were used, and the red ink, the green ink, and the blue ink were applied to each glass substrate, and a red pattern printing film and a green pattern were formed by an intaglio offset printing method. Print film and
A blue pattern printed film was individually formed, and each glass substrate on which the printed film of one color was formed was subjected to the same heat treatment as above, and its film thickness and spectral characteristics were measured.

The results are also shown in Table 1.

[0064]

[Table 1] [Confirmation] As is clear from this result, the thickness of the glass substrate on which the printed film of one color is formed (comparative example) and the glass substrate on which the printed film of three colors is formed are compared. On the other hand, the difference in the film thickness in the case of the heat treatment (Example) is the largest in the case of the blue colorant content is low, and the smallest in the case of the red colorant content high.
Also, it can be confirmed that the difference in the spectral characteristics is the largest in the case of blue with a low content of the color pigment, and the smallest in the case of red with a high content of the color pigment. For this reason, when the blue color with a low content of the color pigment is printed first, the spectral transmittance of the glass substrate on which only the blue print film is formed and the three-color print film are formed. The spectral transmittance of the heat-treated glass substrate will be significantly different, and it will be difficult to predict the spectral characteristics of the color filter required by the heat treatment after three-color printing by sampling inspection during printing. Can be inferred.

On the other hand, from the results of the sampling inspection of the above-mentioned examples and the results of the spectral characteristics of the color filters obtained by the heat treatment after three-color printing, when printing was performed in the descending order of the content of the color pigment, It was almost the same as the spectral characteristic measured in the inspection, and it was also confirmed that the spectral characteristic of the color filter can be accurately controlled by the above sampling inspection.

[0066]

According to the first aspect of the present invention, the amount of change in film thickness of each print film due to the heat hardening treatment after full-color printing and the film thickness in the sampling inspection during printing of each print film. Since the amount of change can be adjusted to be substantially the same, it is possible to accurately predict the film thickness and spectral characteristics of each color filter layer of the color filter to be manufactured based on the measurement result of the sampling inspection.

Therefore, there is an effect that a color filter whose spectral characteristics are adjusted with high precision can be manufactured with good productivity.

According to the second aspect of the invention, the printing ink contains a fluorine-containing surfactant, and when the film is heated and hardened after the full-color printing, the peaks of the chevron shape of the printing film are sufficient. It is possible to easily form a color filter layer having a flat surface in order to uniformly fill the valley portion between adjacent print films, and according to the invention according to claim 3, the print films are adjacent to each other. The edges are printed so that they overlap each other with a width of 1 to 40 μm, and when heat hardening is performed after printing all colors, the peaks of the chevron shape of the printed film collapse and the valley between adjacent printed films Since a sufficient amount of printing ink is supplied, it becomes possible to easily form a color filter layer having a flat surface.

Therefore, there is an effect that the color filter whose spectral characteristics are adjusted with high precision can be manufactured with good productivity and reliably.

According to the fourth aspect of the invention, the transparent substrate having the light-shielding film provided in the inter-pixel region is applied, and
On the light-shielding film, the overlapping regions of the adjacent end portions of the printing film are provided, and the effect of the overlapping portions of the printing films does not affect the display image, so that the image quality can be improved.

[Brief description of drawings]

1A to 1D are process explanatory views showing a method for manufacturing a color filter according to an embodiment.

[Explanation of symbols]

 1 Glass substrate R Printed film with red pattern (color filter layer) G Printed film with green pattern (color filter layer) B Printed film with blue pattern (color filter layer)

Claims (4)

[Claims] 1. A color filter in which printing inks of respective colors containing a color pigment and a resin as main components are sequentially printed on respective pixel portions on a transparent substrate for respective colors so that mutually adjacent end portions overlap each other. After forming the print film for each color that constitutes the layer, heat treatment is performed to flatten the surface of each print film and harden it to form a color filter whose main part is composed of the color filter layer and the transparent substrate. A method for producing a color filter, which comprises sequentially printing from a printing ink having a high content of a coloring pigment to form the printing film for each color. 2. The method for producing a color filter according to claim 1, wherein the printing ink contains a fluorine-based surfactant. 3. The end portions of each printed film adjacent to each other are 1 to
The method for producing a color filter according to claim 1 or 2, wherein printing is performed sequentially so that the widths of 40 µm overlap each other. 4. A transparent substrate having a light-shielding film provided in an inter-pixel portion is applied, and an overlapping region of adjacent end portions of the print film is provided on the light-shielding film. The method for producing a color filter according to 1, 2, or 3.