KR101040443B1 - Ethod adjusting amount of ink jet for ink jet printer for the use of coating pdp fluorescent substance and apparatus thereof - Google Patents

Abstract

The present invention relates to a method and an apparatus for adjusting an ink ejection amount of an inkjet printer for PDP phosphor coating, comprising: applying a phosphor ink sprayed from an inkjet head of an inkjet printer for applying PDP phosphor to a substrate; Detecting an injection amount of the applied phosphor ink by an ink injection amount detector; And comparing the detected ink ejection amount with a preset reference value, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result. The ink injection amount detector 20 is, for example, a visible light for detecting the visible light reflected from the UV lamp 21 and the phosphor coating layer 2 irradiating the UV beam on the phosphor coating layer (2) of the substrate (1). And a detector 22. The present invention compares the intensity detected by a visible light detector with a reference intensity using an ink ejection amount detector while spraying phosphor ink from an inkjet head and applying it to a substrate. Since the intensity is adjusted to the reference value by adjusting, the printing quality is improved by maintaining the phosphor injection amount uniformly.

Description

TECHNICAL APPARATUS FOR METHOD OF INK SPRAYING AREAS AND APPARATUS FOR THE APPLICATION OF PDP PHOPOLAR PHOSPHOTERS PART FLUORESCENT SUBSTANCE AND APPARATUS THEREOF}

1 to 3 are views for explaining the present invention,

1 is a process chart for manufacturing a PDP panel.

2 and 3 are explanatory views of the ink ejection amount detection process.

<Description of the symbols for the main parts of the drawings>

1: Substrate 2: Phosphor Coating Layer

10: inkjet head 11: phosphor ink

20: ink ejection amount detector 21: UV lamp

22: visible light detector

The present invention relates to a method and an apparatus for adjusting the ink ejection amount of a PDP phosphor-coated inkjet printer, and more particularly, to detect the ink ejection amount while spraying the phosphor ink from an inkjet head and to detect the ink ejection amount and to compare the reference intensity to an inkjet The present invention relates to a method and apparatus for adjusting the ink ejection amount of a PDP phosphor-coated inkjet printer, by replacing the head or adjusting the voltage applied to the piezoelectric body to maintain the phosphor ejection amount uniformly.

Modern information displays are typically dominated by cathode ray tubes (CRTs), commonly called CRTs. However, due to the increasing demand for large displays and high resolution televisions, much thinner and lighter than the very bulky and bulky CRTs, high brightness, high efficiency, high resolution, fast response, long life, low driving voltage, low power consumption, low cost and full color The development of (full color) flat panel displays is urgently needed.

Currently developing or producing FPDs include liquid crystal displays (LCDs), electroluminescent displays (ELDs), field emitter displays (FEDs), and plasma display panels (PDPs). .

Since the market share war of these technologies is not only high performance but also low cost realization, the development of low cost process to replace the conventional mainstream screen printing method and photo lithography process is constantly made. Coming.

Screen printing is a simple process that is simple and inexpensive to use, but it is not suitable for high-definition applications because of its poor thickness and width uniformity, and the photolithography process has excellent thickness and width uniformity and thinness. Although it is possible to form a film, it can be applied to a fixed tax, but there are disadvantages in that the material is expensive, lossy, and complicated manufacturing process and expensive equipment are used.

In that respect, ink jet print printing has recently attracted much attention due to its intensive apparatus and low cost process.

Since the biggest object of the inkjet printing machine for PDP phosphor coating to which the present invention relates is to save processing time and cost, one or more inkjet heads 10 having a plurality of nozzles are attached to this apparatus according to the purpose. For example, a head with 32 nozzles requires 20 heads per color to produce one head or panel movement to form a VGA-grade PDP phosphor.

If there is a head or nozzle with an incorrect injection volume in such a bundle of heads, the uniformity will be greatly degraded. One of the causes of the different injection amounts is deterioration of the piezoelectric body used.

In addition, the piezoelectric body not only differs between lots of wafers, but also deteriorates little by little depending on the period of use, and this may also have a degree of deterioration for each piezoelectric body. In addition, the piezoelectric material may affect the injection amount according to the process deviation while going through the printhead attachment process. Therefore, when a large number of heads are mounted in an ink jet printing system, the amount of ejection of all the heads should be inspected and adjusted so that the same amount can be ejected. Adjustments should be made to maintain uniformity.

However, in the conventional PDP phosphor-coated inkjet printer, there is a problem that it is difficult to obtain uniform print quality because there is no technology for effectively checking the phosphor ink ejection amount of the inkjet head while actually printing.

The present invention has been made to solve the above-mentioned problems and defects as described above, the inkjet head is detected by spraying the fluorescent ink in the inkjet head and applied to the substrate to detect the amount of ink ejection and compare the reference strength, the inkjet head It is an object of the present invention to provide a method and apparatus for adjusting the ink ejection amount of a PDP phosphor-coated inkjet printer which can maintain the phosphor ejection amount uniformly by adjusting the voltage applied to the piezoelectric body.

In order to achieve the above object, the ink jetting amount control method of the PDP phosphor coating inkjet printing machine according to the present invention comprises the steps of applying a phosphor ink sprayed from the inkjet head of the inkjet printing machine to apply the PDP phosphor to the substrate; Detecting an injection amount of the applied phosphor ink by an ink injection amount detector; And comparing the detected ink ejection amount with a preset reference value, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result.

One form of the ink injection amount detector comprises a UV lamp for irradiating a UV beam on the phosphor coating layer of the substrate and a visible light detector for detecting visible light reflected from the phosphor coating layer.

Another form of the ink injection amount detector comprises a UV lamp for irradiating a UV beam from the bottom of the substrate and a visible light detector for detecting visible light passing through the substrate and the phosphor coating layer.

By applying the present invention to an inkjet printing machine for PDP phosphor coating, the inkjet head is fixed or flows during the inkjet printing process, and the stage supporting the panel is also fixed or flowable. It is fixed at any position with precise spacing adjustment.

In addition, the inkjet head has one or more nozzles and a plurality of nozzles, and the inkjet head is provided in such a manner as to complete the process in one flow by providing 1-100 pieces according to a desired pattern. Since the plurality of inkjet heads are provided with a device capable of measuring the luminance immediately after the injection, such as an ink ejection amount detector, a process of periodically checking the luminance of a plurality of inkjet heads during the phosphor coating process and replacing the luminance value if it does not meet the reference value is performed. Have

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 shows a process diagram for manufacturing a PDP panel according to the present invention, as shown in this step, setting the ink jet head and loading the ink (S100), cleaning the nozzle surface (S110), Checking the nozzle (S120), aligning the position of the nozzle (S130), loading the substrate on the XY stage (S140), aligning the substrate (S150), and performing ink jet printing Step S160 and step S170 of inspecting the pattern are performed, and then the subsequent step S180 is performed.

FIG. 2 is an explanatory diagram of a PDP phosphor coating process, in which a phosphor ink 11 is sprayed on an inkjet head 10 disposed at a predetermined distance from the substrate 1 to be applied onto the substrate 1. Print in the designed form.

In the inkjet printing machine applying the PDP phosphor in the above process, the present invention applies the phosphor ink 11 ejected from the inkjet head 10 to the substrate 1 while the ink ejection amount detector 20 of the inkjet head 10 is applied. It is characterized in that the printing including the detection process for detecting the injection amount of the phosphor ink 11, and the process of adjusting the ink injection amount compared to the reference value.

The ink injection amount detector 20 detects visible light reflected from the UV lamp 21 and the phosphor coating layer 2 that irradiate UV beams on the phosphor coating layer 2 of the substrate 1 as shown in FIG. 2. And a detector 22.

Using the ink injection amount detector 20 compares the intensity detected by the visible light detector 22 with the reference intensity, and when the ink jet head 10 is too high or low, the voltage applied to the piezoelectric body is replaced or adjusted. The intensity of phosphor injection can be kept uniform according to the reference value.

3 shows another embodiment of the ink ejection amount detector, in which the ink ejection amount detector 20 shows a UV lamp 21 and a substrate 1 and a phosphor coating layer for irradiating a UV beam under the substrate 1. It comprises the visible light detector 22 which detects the visible light which permeate | transmits (2), The other structure and operation are the same as embodiment of FIG.

 As described above, the present invention compares the intensity detected by the visible light detector with the reference intensity using the ink ejection amount detector while spraying the phosphor ink from the inkjet head to apply it to a substrate. Since the intensity is adjusted to the reference value by adjusting the voltage to be applied, there is an advantage of improving the printing quality by maintaining the phosphor injection amount uniformly.

Claims (4)

Applying phosphor ink to a substrate through an inkjet head of an inkjet printer; Detecting an injection amount of the phosphor ink applied to the substrate through an ink injection amount detector; And Comparing the detected ink ejection amount with a predetermined reference value through the ink ejection amount detector, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result; The ink injection amount detector, UV lamp for irradiating the UV beam on the phosphor coating layer of the substrate; And And a visible light detector for detecting visible light reflected from the phosphor coating layer. Applying phosphor ink to a substrate through an inkjet head of an inkjet printer; Detecting an injection amount of the phosphor ink applied to the substrate through an ink injection amount detector; And Comparing the detected ink ejection amount with a predetermined reference value through the ink ejection amount detector, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result; The ink injection amount detector, A UV lamp for irradiating a UV beam on the opposite side of the upper part of the phosphor coating layer of the substrate; And And a visible light detector for detecting visible light passing through the substrate and the phosphor coating layer. An inkjet head of an inkjet printer for applying phosphor ink to a substrate; And An ink ejection amount detector for detecting an ejection amount of the phosphor ink applied to the substrate, comparing the detected ink ejection amount with a preset reference value, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result; The ink injection amount detector, UV lamp for irradiating the UV beam on the phosphor coating layer of the substrate; And And a visible light detector for detecting visible light reflected from the phosphor coating layer. An inkjet head of an inkjet printer for applying phosphor ink to a substrate; And An ink ejection amount detector for detecting an ejection amount of the phosphor ink applied to the substrate, comparing the detected ink ejection amount with a preset reference value, and adjusting the ejection amount of the phosphor ink of the inkjet head based on the comparison result; The ink injection amount detector, A UV lamp for irradiating a UV beam on the opposite side of the upper part of the phosphor coating layer of the substrate; And And a visible light detector for detecting visible light passing through the substrate and the phosphor coating layer.

Images