JP4334862B2 - Color filter defect correcting needle and color filter defect correcting apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a color filter defect correcting needle and a color filter defect correcting apparatus.
[0002]
[Prior art]
As the defects in the color filter, there are a black matrix and a defect in which a colored part protrudes (black defect), a defect in which a part of the black matrix and the colored part is lost (white defect), and the like. Further, the removed portion formed after removing the black defect generated in the process of correcting the defect is also a defect (white defect), and the protrusion of the coated portion formed by coating the white defect is also a defect (black defect).
Here, the term “defect” is used for one or more of those defects. Specify the type of defect where it is likely to be misunderstood.
[0003]
As a method for correcting a defect in a color filter, a method is known in which after a defect (black defect) is removed by a laser beam or the like, ink is applied to a defect removing portion (white defect) with a color filter defect correcting needle (for example, Patent Document 1). The process of applying the ink is shown in FIG. First, the color filter defect correcting needle is moved closer to the ink reservoir (S1), and immersed in the ink reservoir from the tip of the needle to a predetermined position (S2). When the dipped color filter defect correcting needle is pulled up from the ink reservoir, the ink adheres to the tip of the needle (S3).
[0004]
Next, when the color filter defect correcting needle to which ink has adhered is brought into contact with the defect removing portion, a part of the ink is transferred to the defect removing portion (S4), and the color filter defect correcting needle is separated from the defect removing portion. Ink remains in the defect removal portion. That is, ink is applied. Further, the ink that has not been transferred remains at the tip of the needle after application (S5).
[0005]
Next, the color filter defect correcting needle to which the remaining ink is attached is brought close to the cleaning liquid reservoir (S6), and immersed in the cleaning liquid reservoir from the tip of the needle to a predetermined position (S7). When the dipped color filter defect correcting needle is lifted from the cleaning liquid reservoir, the ink is removed, but the cleaning liquid adheres to the tip of the needle (S8). When the cleaning liquid adhering to the tip of the needle is blown off by air blowing (S9), the color filter defect correcting needle is cleaned and can be used in the next application (S10).
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 09-61296
[Problems to be solved by the invention]
In this series of processes, there is a problem that the amount of ink adhering to the needle tip changes depending on the time during which the color filter defect correcting needle is immersed in the ink reservoir from the needle tip to a predetermined position. FIG. 4A shows an explanatory diagram when the time of immersion in ink is short, and FIG. 4B shows an explanatory diagram when the time is long. As shown in FIG. 4A, when the time of dipping in ink is short, the amount of ink rising from a predetermined dipping position is small. At this time, the entire portion to which the ink is attached is immersed in the cleaning liquid reservoir, and cleaning can be performed completely.
[0008]
On the other hand, as shown in FIG. 4B, when the time of immersion in the ink is long, the amount of ink rising from a predetermined position where the ink is immersed is large. At this time, a part of the portion to which the ink is attached is not immersed in the cleaning liquid reservoir, and cleaning may be incomplete. In such a state, when inks of different colors are applied next, there is a problem that the colors of the inks are mixed.
[0009]
In addition, there is a problem that, after cleaning the color filter defect correcting needle used for coating, the cleaning liquid adhering to the needle is removed by air blow, and cannot be completely removed. When the next application is performed in such a state, there is a problem in that the cleaning liquid and the ink that could not be removed are mixed and adversely affect the application.
[0010]
The present invention has been made to solve such a problem, and its purpose is to correct the color filter defect by stabilizing the adhesion amount of ink and cleaning liquid so as not to exceed a predetermined amount and improving the cleaning performance. An object of the present invention is to provide a needle and color filter defect correcting device.
[0011]
[Means for Solving the Problems]
The above problems are solved by the present invention described below. That is, the color filter defect correcting needle according to claim 1 of the present invention is a color filter defect correcting needle for applying ink to a defective portion or a defect removing portion of the color filter, and is inclined with respect to the bottom portion at the tip of the needle. A portion subjected to water repellent processing is formed on the surface of the cylindrical portion near the tip of the needle, excluding the portion. According to the present invention, the adhesion of ink and cleaning liquid is suppressed in the portion subjected to the water repellent finish. Therefore, a color filter defect correcting needle is provided that is stabilized so that the amount of ink or cleaning liquid deposited does not exceed a predetermined amount and has improved cleaning properties. In addition, if the inclined portion and the bottom portion are ground after the surface of the cylindrical material is water-repellent, the color filter defect correcting needle is manufactured, so that the manufacturing is easy and the cost is low.
[0013]
A color filter defect correcting needle according to a second aspect of the present invention is the color filter defect correcting needle according to the first or second aspect, wherein the water repellent process is a nickel plating process. According to the present invention, the water repellent process is performed by nickel plating.
[0014]
According to a third aspect of the present invention, there is provided a color filter defect correcting device in which a water-repellent portion is formed on the surface of a cylindrical portion near the needle tip, excluding a bottom portion and an inclined portion at the needle tip. The needle tip of the defect correcting needle is immersed in ink so that the ink adheres to the needle tip, the ink is applied by bringing the needle tip into contact with a defective portion or a defect removing portion of a color filter, and the needle tip is It is configured to be immersed in a cleaning liquid for cleaning. According to the present invention, a predetermined part of the color filter defect correcting needle is subjected to water repellent treatment, and adhesion of ink or cleaning liquid is suppressed in that part. Accordingly, there is provided a color filter defect correcting device which is stabilized so that the adhesion amount of ink or cleaning liquid does not exceed a predetermined amount and the cleaning property is improved. Further, if the inclined portion and the bottom portion are ground after the water repellent treatment of the surface of the cylindrical material, a needle for correcting a color filter defect is manufactured. Therefore, the needle can be easily manufactured and the cost is low.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described. First, the color filter defect correcting needle will be described with reference to FIG. FIG. 1 is a diagram showing an example of the structure of a needle tip and a portion close thereto in a color filter defect correcting needle. 1A shows a color filter defect correcting needle that has not been subjected to water repellent processing, and FIG. 1B shows a color filter defect correcting needle that has been subjected to water repellent processing. In FIG. 1, 1 is a cylindrical part, 2 is an inclined part, 3 is a bottom part, and 4 is a water-repellent part.
[0016]
The cylindrical portion 1 is a portion having a cylindrical shape in which a cross section perpendicular to the axis is circular and the diameter of the circle does not change along the axis. The cylindrical portion 1 is made of a material having good affinity for ink. For example, metals such as steel, stainless steel, and alloys are used. The diameter of the cylindrical portion 1 is preferably about 200 μm to 1000 μm, for example.
[0017]
The inclined portion 2 is a portion having a conical partial shape. For example, the inclined portion 2 is a portion obtained by grinding the end of the cylindrical portion 1 into a conical shape. The angle of the inclined portion 2 with respect to the axis is preferably about 5 to 45 degrees, for example.
[0018]
The bottom 3 is a circular bottom in the example shown in FIG. For example, the bottom portion 3 is a portion obtained by grinding the apex of the conical shape in the inclined portion 2 (not the conical bottom circle portion). In the present invention, the shape of the bottom 3 is not limited to a circular bottom surface, and may be a convex hemisphere, a concave hemisphere, or other shapes.
[0019]
The water-repellent processed part 4 is a water-repellent film present on the peripheral surface of the cylindrical part 1 shown in FIG. In FIG. 1 (B), it is shown as a cross-sectional view so that it can be easily understood that the film is formed on the peripheral surface of the cylindrical portion 1. This water-repellent coating is formed without a break so as to surround the entire peripheral surface.
[0020]
The water repellent portion 4 can be formed by, for example, electroless nickel plating (Kanizen (R) plating). This electroless nickel plating film has the effect of relaxing the adhesion of ink and cleaning liquid and improving the cleaning performance. The thickness of the coating is preferably about 1 μm to 50 μm, for example.
Further, the water repellent portion 4 can be formed by electroplating, vapor deposition plating, metal spraying, or the like.
[0021]
In the example shown in FIG. 1, the color filter defect correcting needle has a form in which a water repellent portion 4 is formed on the surface of the cylindrical portion 1 and the inclined portion 2 and the bottom portion 3 are excluded. If it is such a form, after forming the water-repellent processed part 4 in the surface in a column-shaped material, if the inclination part 2 and the bottom part 3 are ground and processed, the needle | hook for color filter defect correction will be obtained. This manufacturing method is easy and can reduce the cost. In addition, by grinding the tip of the needle, it is possible to regenerate a damaged needle at the tip of the needle, or to make an arbitrary shape according to the shape of application symmetry and the amount of application.
[0022]
As another manufacturing method, there is a method of forming the water repellent portion 4 after grinding the inclined portion 2 and the bottom portion 3 in a cylindrical material. At this time, the above-described operational effects cannot be obtained, but the water repellent processed portion 4 is formed leaving the side close to the needle tip of the cylindrical portion 1 or repelled so as to cover a part of the inclined portion 2 portion. The water processing part 4 can be formed. When manufacturing by applying the above-described nickel plating process, the portion where the water repellent portion 4 is not formed may be masked (coated) with a plating resist. According to this manufacturing method, the restriction on what range the water repellent portion 4 is made is small and the degree of freedom is large.
[0023]
The state when the color filter defect correcting needle is immersed in the ink reservoir is shown in FIG. As shown in FIG. 2, the ink does not go up through the cylindrical portion 1 of the color filter defect correcting needle. This is a function effect by the physical property of the water-repellent processed part 4 and the physical property of the ink. Therefore, the entire portion where the ink is adhered is immersed in the cleaning liquid reservoir, and cleaning can be performed completely. Further, the amount of ink adhering to the tip of the needle is stabilized without being greatly affected by the time during which the color filter defect correcting needle is immersed in the ink reservoir.
[0024]
As described above, when the color filter defect correcting needle to which the ink is attached is immersed in the cleaning liquid reservoir and then pulled up, the ink is removed and the cleaning liquid is attached to the tip of the needle (S8 described above). ). Then, the cleaning liquid adhering to the tip of the needle is blown off by air blow (S9 described above). At this time, due to the presence of the water-repellent portion 4 in the color filter defect correcting needle, the cleaning liquid is well cut by air blow. That is, the cleaning liquid is satisfactorily removed from the tip of the needle and the cleaning is completed. Therefore, the color filter defect correcting needle can be suitably used in the next application.
[0025]
Next, the color filter defect correcting device will be described. The color filter defect correcting device corrects defects in the color filter using the above-described color filter defect correcting needle. This correction is a correction in which ink is applied to the defect removal portion with a color filter defect correction needle after the defect is removed by a laser beam or the like. Hereinafter, an example of the process of correction by the color filter defect correction apparatus will be described.
[0026]
First, defect detection in the color filter is performed. The color filter is obtained by forming a colored layer made of an acrylic binder and a pigment-based coloring material on a glass substrate by applying a photolithography technique. The colored layer has a pattern in which cells of RGB three primary colors are regularly arranged. In defect detection, a color filter is illuminated with a light source such as a halogen lamp, and imaging is performed with a CCD camera or the like. The captured image is stored in the memory of the data processing unit, the cell shape in the captured image is compared with the reference shape, and a defect is detected from the difference.
[0027]
Next, for example, when a defect (black defect) in which a resist (black matrix) protrudes from the colored portion of the cell is detected, the YAG laser (second harmonic) is used to adjust the slit diameter to the defect shape. (For example, 50 μm) The laser beam is irradiated with several pulses to remove defects.
[0028]
Next, using the color filter defect correcting needle having the water repellent portion 4, ink is applied to the portion where the defect has been removed by the application process (see FIG. 3). At this time, the ink does not rise from the tip of the needle due to the action and effect of the water repellent portion 4. Further, since the entire portion where the ink is adhered is immersed in the cleaning liquid, there is no color mixing. Further, since the cleaning liquid in the water-repellent processed portion 4 is easily repelled, the removal by air blow is complete, and there is no adverse effect such as dilution of the ink.
[0029]
Next, the applied ink is cured by irradiation with electromagnetic radiation (for example, ultraviolet rays).
Next, when it is necessary to correct the applied shape, the shape is corrected by irradiating several pulses of YAG laser light with the slit aperture adjusted to the corrected shape.
[0030]
The example of the correction process by the color filter defect correction apparatus has been described above. Depending on the configuration of the color filter and the type of defects present there, the defect correction process is not exactly the same. However, it is the same in that the process of removing unnecessary parts (black defects) with a laser beam and the process of applying ink to the removed parts (white defects) using a color filter defect correcting needle are the same. Since there is, explanation is omitted.
[0031]
【The invention's effect】
As described above, according to the color filter defect correcting needle according to claim 1 of the present invention, the color in which the adhesion amount of the ink or the cleaning liquid is stabilized so as not to exceed the predetermined amount and the cleaning property is improved. A filter defect correcting needle is provided. In addition, the color filter defect correcting needle can be easily manufactured, and the cost can be reduced .
According to the color filter defect correcting needle of the second aspect of the present invention, the water repellent finish is applied by nickel plating.
Further, according to the color filter defect correcting device of claim 3 of the present invention, there is provided a color filter defect correcting device which is stabilized so that the amount of ink or cleaning liquid adhering does not exceed a predetermined amount and the cleaning property is improved. The In addition, the color filter defect correcting needle can be easily manufactured, and the cost can be reduced .
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of the structure of a needle tip and a portion close thereto in a color filter defect correcting needle.
FIG. 2 is a diagram showing a state when a color filter defect correcting needle is immersed in an ink reservoir.
FIG. 3 is an explanatory diagram showing a process of applying ink using a color filter defect correcting needle.
FIG. 4 is an explanatory diagram showing that the amount of ink adhering to the tip of the needle changes depending on the amount of time immersed in the ink reservoir.
[Explanation of symbols]
1 Cylindrical part 2 Inclined part 3 Bottom part 4 Water repellent part

Claims (3)

This is a color filter defect correction needle for applying ink to defective or defect-removed portions of the color filter, and has a water-repellent finish on the surface of the cylindrical portion near the needle tip, excluding the bottom and inclined portions at the needle tip. A needle for correcting a color filter defect, characterized in that an applied portion is formed. 2. The color filter defect correcting needle according to claim 1 , wherein the water repellent process is a nickel plating process. The needle tip of the color filter defect correcting needle in which a water-repellent portion is formed on the surface of the cylindrical portion near the needle tip, excluding the bottom and the inclined portion at the needle tip, is immersed in ink. Ink is applied to the tip, the ink is applied by bringing the tip of the needle into contact with a defective or defective portion of the color filter, and the tip of the needle is immersed in a cleaning solution for cleaning. Color filter defect correction device.

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