KR20070084648A - A spray head and a spray unit including the spray head, method for manufacturing a pattern using the spray head and display device including the pattern - Google Patents

Abstract

A spray head, a spray unit including the same, a method for forming a pattern by using the same and a display device including the pattern are provided to form crossly the first and second patterns, thereby overlapping the first and second patterns partially. A spray head includes plural spray nozzles. The arrangement distance of spray nozzles at the edge is wider than that of the spray nozzles formed at the middle area. The spray heads are located at different columns and the edges of the spray heads are arranged adjacently. The ink is sprayed by the spray head so that a pattern is formed. The pattern is any one among a color filter pattern, an organic EL(Electro-luminescence) pattern, a protection pattern and an organic semiconductor pattern. In the first and second patterns, the density of the edge thereof is higher than that of the middle. The edge of the first pattern is overlapped with the edge of the second pattern so that the density of the overlapped area of the first and second patterns is the same as that of the middle of the first and second patterns.

Description

A spray head and a spraying unit including the same, a method of forming a pattern using the spray head, and a display device including the pattern THE PATTERN}

1 is a configuration diagram schematically showing a pattern forming apparatus according to the present invention.

FIG. 2 is a view illustrating one spray head mounted on the spray apparatus shown in FIG. 1.

FIG. 3 is a diagram illustrating a pattern of ink or a solution sprayed in regions A and B of FIG. 2.

Figure 4 is a view showing the arrangement of the injection head according to the present invention.

FIG. 5 is a diagram illustrating a pattern sprayed in region C of FIG. 4.

6 is a view showing another pattern of the injection in the region C of FIG.

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

100: substrate 200: stage

300: feeder 400: storage tank

500: injector

Among the various flat panel display devices currently developed, the liquid crystal display device is thinner and lighter than other display devices, and has a low power consumption and a low driving voltage. It is widely used in various electronic devices ranging from TVs.

The liquid crystal display includes a thin film transistor (TFT) for switching each pixel and a TFT substrate having a pixel electrode, a counter substrate having a color filter and a common electrode, and a liquid crystal sealed between two substrates. A panel and a backlight assembly for providing light to the liquid crystal display panel.

Here, when the color filter formed on the substrate is formed by an inkjet printing method, it is possible to reduce the manufacturing cost and reduce the defective rate.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern forming apparatus, a method, and a display device manufactured by the method. More particularly, the present invention relates to a pattern forming apparatus, a method, and a method for producing a display with good display quality even when different solutions are injected into adjacent pattern forming regions. It relates to a display device.

In addition, a pattern forming apparatus capable of reducing errors occurring between adjacent patterns and a display device manufactured using the apparatus are provided.

The present invention is to provide a method and a method which can prevent the display quality deterioration due to the injection amount error that can occur between the patterns formed in one spray head to partially overlap with the pattern formed in the other spray head. Provided are facilities and a display device manufactured by the method.

The first spray head of the present invention sprays a solution for forming a first pattern to perform primary printing to fill the pattern forming region, and the second spray head sprays a solution onto the first printed substrate to form a first print. Secondary printing is performed to form two pattern regions.

By using one jet head continuously, the first pattern and the second pattern may be printed with one jet head.

As shown in Fig. 2, the jet nozzle of the head for injecting ink or solution is not dense at the edge of the head but is formed in a coarse shape. As shown in FIG. 3, the injection head including the jet nozzle having the sparse edge is configured to partially overlap the injection heads. At this time, the sparsely configured spray nozzles are engaged with each other in the overlapping areas of the spray head 1 and the spray head 2 so that a uniform pattern can be formed as shown in FIG. 4 when the pattern is formed.

In this case, even if there is a difference between the injection liquids injected from the injection head 1 and the injection head 2, the injection liquid injected between the injection head 1 and the injection head 2 gradually changes, so that the boundary line becomes inconspicuous.

The arrangement of the injection nozzles provided in the injection head may be alternated as shown in FIG. 2 or FIG. 4, and the density thereof may be gradually changed as in FIG. 5, and the arrangement may be variously implemented.

In addition, a plurality of spray heads may be provided in one spray unit, and the spray heads may overlap each other, and a pattern formed in advance when the adjacent pattern is formed after patterning with a spray unit having a plurality of spray heads is provided. The pattern may be formed so as to overlap with.

Basically, it is desirable to design the injection quantity of the inkjet injector to be constant. Thus, the pattern formed by the ink jet injector is designed to be formed into a film having a constant thickness. However, due to equipment and process errors, the amount of ink or solution sprayed from the injector is not always constant, and thus the amount of sprayed may vary between the spray nozzle and the nozzle, between the spray head and the head, and between the spray unit and the unit.

The present invention is to prevent degradation of display quality due to process and equipment errors that may occur between injection heads or injection units provided with a plurality of injection heads, and to form patterns such that adjacent pattern units cross each other. .

An embodiment of the present invention may be a color filter of a display screen. In the case of a color filter, one spray nozzle may form a color filter layer over one pixel region, and a plurality of spray nozzles may spray color filter resin in one pixel region. In the case where one jet nozzle injects the culper filter resin over the entire pixel area, each of the jetted inks in FIG. 5 may be regarded as one pixel color filter.

The present invention can be applied to a process of forming an alignment film pattern, an organic semiconductor pattern, an insulating film pattern, a color filter pattern, an organic EL pattern, a protective film pattern, or the like formed by an inkjet method.

As described above, the pattern forming apparatus according to the present invention includes a first spray head and a second spray head.

The resin sprayed from the first spray head forms a first pattern, and the resin sprayed from the second spray head forms a second pattern. An edge region of the first pattern and the second pattern overlaps each other, and the amount and pattern density of the resin sprayed on the pattern region of the overlapping edge are substantially the same as the center portion of the first pattern and the center portion of the second pattern.

Thus, even if there is a difference in the amount of resin sprayed on the first pattern and the second pattern, the display device can be manufactured with good display quality by not being visually recognized by the display device.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

Claims (9)

An injection head comprising a plurality of injection nozzles, wherein an arrangement interval of the injection nozzles at the edge is larger than an arrangement interval of the injection nozzles formed in the intermediate region. An injection unit comprising an injection head having an array spacing of edge injection nozzles larger than an array spacing of injection nozzles formed in an intermediate region, placing the injection heads in different rows and arranging the edges of the injection heads adjacently; . The method of claim 2, And arranging the edges of the injection heads adjacent to each other so that the arrangement interval of the injection nozzles in the overlapped area is substantially the same as that of the injection nozzles formed in the intermediate area of the injection head. A display device comprising a pattern formed by jetting ink through the jetting head according to claim 1. The display device of claim 4, wherein the pattern is any one of a color filter pattern, an alignment layer pattern, an organic EL pattern, a protective layer pattern, and an organic semiconductor pattern. Forming a first pattern having a higher pattern density of the center region than the pattern of the edge region; Forming a second pattern having a higher pattern density of the center region than the pattern of the edge region, The edge of the first pattern is formed overlapping with the edge of the second pattern, the pattern density of the central region of the first pattern and the second pattern and the density of the pattern formed by overlapping the two patterns is formed to be substantially the same Pattern formation method. The pattern forming method according to claim 6, wherein the first pattern and the second pattern are any one of a color filter pattern, an alignment layer pattern, a protective layer pattern, an organic EL pattern, and an organic semiconductor pattern. The method of claim 6, Wherein the first pattern is formed of a first spray head, and the second pattern is formed of a second spray head. The method of claim 6, And the first pattern and the second pattern are formed of one spray head.

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