KR20090002713A - Manufacturing method of color filter using inkjet printer - Google Patents

Abstract

A method for manufacturing a color filter for a display device is provided to obtain high resolution and to implement a flexible display device by high speed printing, heating adherence, or deposition by the ink jet printer and a laser beam. An ink-jet printer head prints the RGB pixel pattern while moving on a transparent insulating substrate according to the RGB pixel pattern print data value set by a computer program. A spray ink pattern sprayed from an ink jet nozzle of the printer head is received on a surface of the insulating substrate and is heated and adhered by a laser beam. An adhered ink pattern comprising the RGB pattern is formed on a transparent insulating substrate according to the pint data value set by the computer program. The ink sprayed on the surface of the transparent insulating substrate includes a resin component.

Description

Manufacturing method of color filter for display apparatus using inkjet printer {Manufacturing method of color filter using inkjet printer}

The present invention relates to a method for manufacturing a color filter having an RGB pixel pattern applied to a flat panel display device such as a liquid crystal display (LCD), a plasma display (PDP), a field emission device (FED), and a vacuum fluorescent display (VFD). In particular, the present invention relates to a manufacturing method of a color filter for a display apparatus using an inkjet printer, which can maintain a high resolution while simplifying the manufacturing process of the color filter, thereby reducing production cost and improving productivity, and enabling the implementation of a flexible display apparatus. .

The LCD panel, which is a representative example of a low power consumption and thin flat panel display device, is composed of a TFT (Thin Film Transistor) substrate, a color filter substrate disposed opposite the TFT substrate, and a liquid crystal cell injected between the TFT substrate and the color filter substrate. This TFT-LCD panel displays image information by using the electro-optical properties of the liquid crystal which reacts when a graphic signal is applied to the switching element on the TFT substrate.

In general, a plurality of gate lines and data lines are arranged in a matrix form on the TFT substrate. An input pad for inputting an electrical signal is formed for each gate line and data line, and at the intersection of the gate line and the data line, A switching element that operates in accordance with the control signal of the display control system is arranged.

The LCD displays information on the screen by using the refractive anisotropy of the liquid crystal. The color filter used here is a color pattern of any one of three colors of yellow (Y), magenta (M), and cyan (C) of complementary colors. One layer having each of the three corresponding areas and any two color patterns of the three complementary colors are superimposed on one of three primary colors, red (R), green (G), and blue (B). It consists of two-layer portions having three areas each corresponding to represent full colors by a combination of these six color patterns.

In addition, a first coloring region representing each of the three RGB primary colors and a second coloring region representing each of the three CMY complementary colors are formed, and the second coloring region is laminated so that the CMY complementary colors corresponding to the RGB primary colors of the first coloring region overlap. This allows full color display through guest host mode.

The color filter applied to the full color display apparatus generally includes a process of forming a transparent resin layer by coating a transparent resin on a transparent insulating substrate and removing a part of the applied transparent resin by a mask exposure, and the transparent insulating substrate. Applying a color pigment of red onto the mask and removing a part of the applied color pigment by mask exposure to form a color filter layer of red; and applying a color pigment of green on the transparent insulating substrate, Removing a part of the applied green colorant to form a green color filter layer, applying a blue colorant on the transparent insulating substrate, and removing a part of the applied colorant of blue by mask exposure to remove the blue color The process of forming a filter layer is included.

In particular, the part which laminated | stacked the transparent resin layer on the transparent insulation board | substrate was laminated so that the color filter layer of any one color of red, green, and blue may overlap, and in parts other than the part which laminated | stacked the said transparent resin layer, red, green, blue A color filter is completed by laminating adjacent color filter layers of any two colors.

However, according to the manufacturing process of the color filter as described above, when forming the pixel pattern of the RGB primary color (and CMY complementary color) on the transparent resin layer or the transparent substrate, for each R, G, B pixel (and C, M, Y complementary color) For each color pattern, the complicated and time-consuming processes such as application, masking, exposure, and etching of the corresponding color must be repeatedly performed.

The present invention solves the problems of the prior art as described above, and an object of the present invention is to provide a liquid crystal display (LCD), a plasma display (PDP), a field emission device (FED) and a vacuum fluorescent display (VFD). When manufacturing a color filter having an RGB pixel pattern applied to the same flat panel display device, the color filter is manufactured by a high speed printing method using an inkjet printer and a laser beam, thereby maintaining the high resolution of the color filter and simplifying the manufacturing process. The present invention provides a manufacturing method of a color filter for a display apparatus using an inkjet printer, which can reduce cost and improve productivity, and enables the manufacture of a flexible display.

In order to achieve the above object, a method of manufacturing a color filter for a display device using the inkjet printer of the present invention is that a printhead of an inkjet printer is formed on a transparent glass insulating substrate according to RGB pixel pattern print data values set and instructed on a computer program. An inkjet print of the RGB pixel pattern is performed while moving the ink, and the printing ink sprayed from the inkjet nozzle of the printhead and dropping onto the surface of the transparent glass insulation board is immediately heated and fixed by a laser beam, thereby forming a transparent glass insulation board. And a series of RGB pixel patterns formed on the surface continuously.

In addition, a method of manufacturing a color filter for a display device using another inkjet printer of the present invention is a printer head of an inkjet printer moving on a transparent synthetic resin insulating substrate according to an RGB pixel pattern print data value set and instructed on a computer program. An ink pixel print of an RGB pixel pattern is performed, and a printing ink sprayed from the inkjet nozzle of the print head and dropping onto the surface of the transparent synthetic resin insulating substrate is instantaneously heated and sublimated by a laser beam to the inner surface of the transparent synthetic resin insulating substrate. And the series of deposited RGB pixel patterns are continuously formed inside the synthetic resin surface.

The method for manufacturing a color filter for a display device using an inkjet printer according to the present invention is capable of manufacturing a color filter for a high resolution flat panel display device by high speed printing and heat fixing or deposition using an inkjet printer and a laser beam, thereby providing high resolution color. It is expected to reduce production cost and improve productivity by simplifying the manufacturing process of the filter.

In addition, the flat panel display device of the present invention using an inkjet enables the implementation of a flexible display device which is a type of a portable display device.

It will be apparent to those skilled in the art from the method of the present invention that a color filter for a solid state image pickup device can be manufactured through design changes.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional configuration diagram of an LCD display device that is a typical use of a color filter.

As referred to herein, the light generated from the light source 70 is the color filter panel 41 depending on the degree of control of the liquid crystal 50 by the TFT 60 which is switched according to the control output of the LCD control circuit (not shown). By passing through the RGB pixel pattern, the LCD display device creates a full color screen.

The color filter panel 41 used here is composed of a series of combinations of consecutive RGB pixels as shown in FIG. The pixel size of LCD monitors, which are usually used for home or office use, is very small, about 0.1 to 0.26mm.

3 is a manufacturing process diagram of the first embodiment of the color filter according to the present invention, Figure 4 is a flow chart illustrating the manufacturing process of the color filter of FIG.

Here, in order to form the color pixel panel constituting the color filter on the transparent insulating substrate to form the color filter panel 41, the inkjet printer printhead 20 is transparent according to the print data values set and instructed on a computer program. The process of printing a series of RGB pixel patterns on an inkjet printer while moving over an insulating substrate is described.

In the RGB pixel pattern array inkjet printing on the transparent glass insulating substrate for manufacturing the color filter panel, the ink jet pattern ejected from the inkjet nozzle 21 of the printhead 20 to the insulating substrate is formed on the surface of the insulating substrate. Instantly heat-seed by the laser beam as soon as the dropping point is settled, so as to form a fixing ink pattern 43 that forms an RGB pattern on the surface of the transparent insulating substrate precisely without being affected by the printing data values set and instructed on a computer program. As a result, the glass filter panel 41 of high resolution is finally made through the combination thereof.

At this time, the ink to be sprayed on the surface of the transparent insulating substrate includes a resin component and the high temperature by the laser beam as soon as the printing ink for forming the spraying ink pattern 42 falls on the surface of the transparent glass insulating substrate, which is a color filter panel. Since it is heated and fixed in an instant, a high-resolution adhesion ink pattern 43 is formed which maintains an accurate pixel shape without a wetting phenomenon caused by surface tension of ink or the like.

This is because a series of successive RGB pixel patterns formed on an insulated transparent glass substrate by an inkjet printer have its own surface protruding height by the resin component, but the resolution is excellent as it is instantaneously fixed with a laser beam at a fast and accurate position. It is possible to manufacture high color filters for display.

In the first embodiment, the base material of the color filter panel 41 is glass, and even in the case of synthetic resin, an RGB pixel pattern having the same precision can be obtained.

5 is a manufacturing process chart of the second embodiment of the color filter according to the present invention, Figure 6 is a flow chart for explaining the manufacturing process of the color filter of FIG.

Here, the manufacturing process of the color filter panel 41-1 formed by depositing the RGB pixel pattern inside the surface of the transparent synthetic resin insulating substrate is explained. In order to deposit and form the RGB pixel pattern inside the surface of the insulating substrate made of transparent synthetic resin material, the inkjet printer printhead 20 moves on the transparent synthetic resin insulating substrate according to the print data values set and instructed in the computer program. A series of RGB pixel patterns can be inkjet printed, and then a printing ink sprayed onto the insulating substrate to draw the RGB pixel pattern is immediately hot-sublimed by a laser beam to be deposited inside the insulating substrate.

Accordingly, since the RGB pixel pattern formed on the surface of the color filter panel 41-1 does not have the height of the physical printing layer, the deletion of the RGB pixel pattern or the peeling separation of the printing layer due to the surface friction does not occur. It is possible to make the thickness of the color filter thinner.

The ink sprayed and printed on the surface of the transparent synthetic resin insulating substrate is an anhydrous pigment ink containing no resin component. Anhydrous inks are heated at a high temperature by a laser beam immediately after being sprayed onto the surface of the transparent insulating substrate which will form the color filter panel, and are instantly deposited. Therefore, an accurate RGB pattern is maintained without wetting due to surface tension or smearing of the ink. To obtain a high resolution color filter.

In addition, since the deposition ink pattern 44 of the RGB pixel formed on the synthetic resin insulating substrate having flexibility of transparency is located inside the insulating substrate surface, it does not have a protruding printing layer, thereby reducing the thickness of the color filter panel 41-1. The thickness can be reduced, so that the thickness of the final display device can be reduced, and if necessary, the flexible display device can be implemented.

Fig. 7 is a first embodiment view of the RGB pixel array inkjet printing apparatus for color filters according to the present invention.

Here, the inkjet printer apparatus receives a print data signal or a pre-programmed print data signal from a computer (not shown) and moves the carriage rail 30 disposed between the side walls 31 and 32 on both sides of the printer body, thereby supporting the base 40. It includes a printer head 20 for printing a predetermined character, symbol, pattern on the surface of the color filter panel 41.

The print head 20 is arranged to spray ink on the surface of the glass material or the synthetic resin material through the ink jet nozzle 21 to print.

Predetermined position of the inkjet printer is a laser beam generator 10 for generating a laser beam for high-temperature sublimation or instantaneous fixation of the print ink jetted from the inkjet nozzle 21 of the printhead 20 onto the surface of the color filter. Posted in

The laser beam output from the laser beam generator 10 is disposed on the opposite sidewall of the laser beam generator so that the first mirror 11 is reflected in a direction parallel to the carriage rail 30 on which the print head is to be mounted. Here, the first mirror has a general support structure, for example, a flexible support frame structure, capable of adjusting the reflection angle of the laser beam.

The laser beam reflected from the first mirror 11 and irradiated in a direction parallel to the carriage rail 30 passes to the point immediately after printing by the inkjet nozzle through the second mirror 22 mounted on the printer head 20. Position the second mirror 22 to be irradiated. Like the first mirror 11, the second mirror 22 also has a general support structure capable of adjusting the reflection angle of the laser beam.

The operation of the first embodiment of the RGB pixel array inkjet printing apparatus for color filters of the present invention is as follows.

The laser beam output from the laser generating apparatus 10 is irradiated to the printing spot by the inkjet nozzle 21 of the print head 20 through the first mirror 11 and the second mirror 22. Therefore, when the print head 20 performs the printing operation while moving along the carriage rail 30, the laser beam follows the inkjet printing area in the same way, and immediately heats the dropped printing ink to fix it in the case of glass. Or heat deposition (in the case of a synthetic resin), high-quality print quality is obtained without the effect of bleeding or surface tension due to wetting on the surface of the color filter panel.

That is, the printhead receives a print data signal according to a computer or its own program, and then prints a letter, symbol, or pattern on the color filter panel 41 whose surface is smoothly polished, such as glass or synthetic resin, through the inkjet nozzle 21. When printing, etc., the ink ejected from the inkjet nozzle 21 and seated on the color filter panel is immediately heated by the laser beam, and is instantly fixed to the surface of the color filter panel 41 on the pedestal 40, thereby printing at high resolution. Quality can be obtained.

Thus, by fixing the ink spots on the surface of the color filter panel instantaneously by using a laser beam to solve the wetting problem commonly seen on the surface of the glass or synthetic resin it is possible to obtain a high-resolution print quality.

In the high resolution color filter inkjet printing on the glass or synthetic resin surface according to the present invention, the ink filled in the inkjet cartridge may contain a resin component. In addition, to obtain the best resolution according to the printing speed and printing type of the inkjet printer, a conventional laser beam intensity adjusting device (not shown) is added to the laser beam generating device for instant heating and fastening to the drop printing ink on the surface of the color filter panel. The output of the laser beam can be adjusted.

FIG. 8 illustrates a structure capable of supporting a bidirectional inkjet printing mode as a second embodiment of the RGB pixel array inkjet printing apparatus for color filters according to the present invention.

The second embodiment of the apparatus of the present invention is a configuration in which the third to fifth mirrors 12, 13, and 23 are additionally installed in the configuration of the first embodiment described above, and the second mirror 22 of the printer head 20 The fifth mirror 23 is mounted on the corresponding opposite side, and the fifth mirror 23 is mounted on the fourth mirror 13 and the upper portion of the first mirror disposed at the opposite position corresponding to the first mirror 11. The laser beam of the laser beam generator 10 is irradiated through the arranged third mirror 12.

Like the laser beam between the first mirror 11 and the second mirror 22 described above, the laser beam between the fourth mirror 13 and the fifth mirror 23 forms the same parallel lines as the carriage rail 30. Configure.

Therefore, in the bidirectional printing of the inkjet printer, when the printing direction of the print head 20 is printed while moving from right to left on the drawing, the laser beams of the laser beam generator 10 are the third, fourth, and fifth mirrors 12 and 13. The inkjet print ink seated on the surface of the color filter panel 41 is instantaneously fixed or heated by instantaneous heating, or, on the contrary, the print head 20 is printed while the printing direction of the print head 20 moves from left to right on the drawing. In this case, the laser beam of the laser beam generator 10 immediately heats a drop printing ink seated on the surface of the color filter panels 41 and 41-1 through the first and second mirrors 11 and 22 to instantly fix it. Immediately heat deposit.

By this operation, it is possible to prevent a decrease in print quality and a resolution due to wetting during mirror-jet inkjet printing of glass or synthetic resin.

In order to execute the bidirectional printing operation mode of the second embodiment of the present invention as described above, the beam irradiation angle of the laser beam generator 10 which can be easily selected by those skilled in the art can be easily selected. Conventional tilting control techniques can be applied.

9 is a third embodiment of the RGB pixel array inkjet printing apparatus for a color filter according to the present invention, and shows a manufacturing process of a color filter panel capable of supporting another bidirectional inkjet printing mode.

Here, a color filter panel made of glass material, metal material or synthetic resin material by a pair of independent laser beam generators 10 and 15, first and second mirrors 11 and 22 and fourth and fifth mirrors 13 and 23, respectively. It is possible to perform bidirectional inkjet printing on the surface of the (41, 41-1), the laser beam output from the pair of laser beam generating apparatus (10, 15), the first and second mirrors (11, 22) and the fourth Using the 5 mirrors (13.23), the printing ink, which has been spot-seated on the surface of the color filter panels 41 and 41-1, is immediately fixed by heating. This prevents degradation of print quality and resolution due to wetting phenomena that may occur in inkjet printing on smooth surfaces of glass, metal or synthetic resin materials.

Figure 10 is a high-resolution inkjet printing of the RGB pixel array for color filters according to the present invention, the printing ink is set on a computer program, according to the specified print data value is precisely sprayed without feeling. Fig. 1 is a block diagram of the first embodiment of the laser beam adjusting apparatus for heating and depositing on the surface of the color filter or depositing it inside the surface of the color filter.

Here, it is shown that the second mirror 22 or the fifth mirror 23 to be mounted on the printer head 20 can be manufactured and installed as an adjustable laser beam diffusion mirror.

These diffusion mirrors have a function of adjusting the irradiation area (range) of the laser beam for instantaneous heating instant fixation of ink spotted on the surface of the color filter panels 41 and 41-1 by spraying from the ink jet nozzle. For example, the laser beam irradiation diffusion regions L1 and L2 by the mirror having a diffusion function are adjusted by adjusting the installation height of the second mirror 22 or the fifth mirror 23 or the reflection angle thereof. It is possible.

Fig. 11 is a precise setting of the printing ink in a computer program for high-resolution inkjet printing of a color filter RGB pixel array according to the present invention. Fig. 2 is a configuration diagram of a second embodiment of the laser beam adjusting device for heating and depositing on the surface of the color filter or depositing it inside the surface of the color filter.

This is a color filter panel (41, 41-1) by installing a lens 24 that can be moved in the space between the second mirror 22 or the fifth mirror 23 and the color filter panel mounted on the print head 20 It is possible to control the spreading degree and the spreading range (L1, L2) of the laser beam to instantly heat the printing ink seated on the surface of the sheet.

1 is a cross-sectional structure diagram of an LCD display device for explaining the color filter of the present invention.

2 is a block diagram of an exemplary RGB pixel array of a color filter.

3 is a manufacturing process chart of the first embodiment of the color filter according to the present invention.

FIG. 4 is a flowchart for describing a color filter manufacturing process of FIG. 3.

5 is a manufacturing process chart of the second embodiment of the color filter according to the present invention.

FIG. 6 is a flowchart for describing a color filter manufacturing process of FIG. 5.

Fig. 7 is a first embodiment view of the RGB pixel array inkjet printing apparatus for color filters according to the present invention.

Fig. 8 is a view showing a second embodiment of the RGB pixel array inkjet printing apparatus for color filters according to the present invention.

9 is a third exemplary embodiment of the RGB pixel array inkjet printing apparatus for color filters according to the present invention.

Figure 10 is a high-resolution inkjet printing of the RGB pixel array for color filters according to the present invention, the printing ink is set on a computer program, according to the specified print data value is precisely sprayed without feeling. Fig. 1 is a block diagram of the first embodiment of the laser beam adjusting apparatus for heating and depositing on the surface of the color filter or depositing it inside the surface of the color filter.

Fig. 11 is a precisely sprayed printing ink according to the print data values set and instructed on a computer program for high-resolution inkjet printing of an RGB pixel array for color filters according to the present invention. Fig. 2 is a configuration diagram of a second embodiment of the laser beam adjusting device for instantaneous heating and for instant fixation on the surface of the color filter or for deposition inside the surface of the color filter.

* Description of the symbols for the main parts of the drawings *

10,15 laser beam generator 11,12,13,22,23 mirror

20: printhead 21: inkjet nozzle

24 lens 30 carriage rail

40: pedestal 41,41-1: color filter panel

42: injection ink pattern 43: adhesion ink pattern

44: deposited ink pattern 50: liquid crystal

60: TFT

Claims (4)

In the method of manufacturing a color filter for a display device, the printhead of the inkjet printer moves on a transparent glass insulation substrate according to the RGB pixel pattern print data value set and instructed on a computer program, thereby inkjet printing the RGB pixel pattern. The printing ink sprayed from the inkjet nozzle of the printhead and dropping on the surface of the transparent glass insulating substrate is instantaneously heated and fixed by a laser beam to continuously form a series of RGB pixel patterns on the surface of the transparent glass insulating substrate. Method of manufacturing a color filter for a display device using an inkjet printer, characterized in that. The method of manufacturing a color filter for a display device using an inkjet printer according to claim 1, wherein the printing ink contains a resin component. In the method of manufacturing a color filter for a display device, the printhead of an inkjet printer moves on a transparent synthetic resin insulating substrate according to the RGB pixel pattern print data value set and instructed on a computer program, thereby inkjet printing the RGB pixel pattern. And a printing ink sprayed from the inkjet nozzle of the printhead and dropping onto the surface of the transparent resin insulating substrate is instantaneously heated and sublimated with a laser beam to be deposited inside the surface of the transparent synthetic resin insulating substrate. A method of manufacturing a color filter for a display device using an inkjet printer, characterized in that the RGB pixel pattern is continuously formed inside the surface of the synthetic resin material. The method of manufacturing a color filter for a display device using an inkjet printer according to claim 3, wherein the printing ink is an anhydrous ink.

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