KR101187281B1 - Device and Method of Controlling Negative Pressure, and Ink-jet Printing Apparatus Having the Same - Google Patents

Device and Method of Controlling Negative Pressure, and Ink-jet Printing Apparatus Having the Same Download PDF

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KR101187281B1
KR101187281B1 KR20100072269A KR20100072269A KR101187281B1 KR 101187281 B1 KR101187281 B1 KR 101187281B1 KR 20100072269 A KR20100072269 A KR 20100072269A KR 20100072269 A KR20100072269 A KR 20100072269A KR 101187281 B1 KR101187281 B1 KR 101187281B1
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sound pressure
positive pressure
sound
positive
pressure
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KR20100072269A
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Korean (ko)
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KR20120010745A (en
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남궁기
최우혁
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주식회사 나래나노텍
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Abstract

The present invention discloses a sound pressure control device and method, and an inkjet printing device having the same.
The negative pressure control device according to the present invention comprises a pump for generating a positive pressure (positive pressure); A regulator connected to the pump and regulating the positive pressure generated from the pump; An ejector having an input connected to the regulator and generating a positive pressure through an output when the positive pressure is input through the input; And a sound pressure sensor provided between the output unit and the object to sense and measure the sound pressure.

Description

Sound pressure control device and method, and inkjet printing apparatus having the same {Device and Method of Controlling Negative Pressure, and Ink-jet Printing Apparatus Having the Same}

The present invention relates to a sound pressure control apparatus and method, and an inkjet printing apparatus having the same.

More specifically, the present invention compared to the prior art by using an ejector that converts a large supply pressure into a fine pressure negative pressure to precisely control the discharge pressure of an object such as an inkjet head used in an inkjet printing apparatus. A negative pressure control device and method capable of finely controlling the negative pressure applied to the object and the discharge pressure of the object, and by precisely adjusting the amount of ink discharged from the object, can significantly improve the quality of the final product, and An inkjet printing apparatus.

Generally, in order to manufacture an electronic circuit component or a flat panel display (FPD) such as a plasma display panel (PDP) or a liquid crystal display panel (LCD), for example, a photoresist (PR) liquid or Using metal pastes such as copper (Cu), silver (Ag), aluminum (Al), etc., electrodes or dots (such as electrodes or dots) on a glass surface or a printed object such as a printed circuit board (PCB) are used. Certain patterns, such as dots, must be formed.

As a method for forming the above-described constant pattern, for example, a method of directly patterning a constant pattern on a printing object using an inkjet head that ejects ink droplets is used.

1A is a view showing a perspective view of an inkjet printing apparatus according to the prior art.

Referring to FIG. 1A, an inkjet printing apparatus 100 according to the related art includes, for example, one or more inkjet heads 120 for supplying ink to form a plurality of patterns 114 on a printing object 110; A gantry 130 mounted with the at least one inkjet head 120 and movable on the printing object 110; A plurality of inspection devices (not shown) mounted at the rear of the gantry 130 and configured to inspect a state of the plurality of patterns 114 formed on the printing object 110; An ink storage device (150) connected to each of said one or more inkjet heads (120) for providing ink; And a sound pressure adjusting device 170 (see FIG. 1C to be described later) for adjusting the sound pressure of the one or more inkjet heads 120. One or more inkjet heads 120 may each be a thermal inkjet head or a piezo inkjet head. Hereinafter, the operation of the inkjet printing apparatus 100 according to the prior art will be described in detail.

Referring again to FIG. 1A, in an inkjet printing apparatus 100, an ink supply main conduit 152 and a plurality of branch conduits 152a, from an ink storage device 150 to one or more inkjet heads 120. Ink is supplied in advance through 152b, 152c, 152d, ..., 152e. The start and end of the ink supply is controlled by the plurality of control valves 156a, 156b, 156c, 156d, ..., 156e. The pressing force of the ink storage device 150 is provided by a pressurized fluid (for example, air) supplied from the ink pressurizing conduit. The supply of the pressurized fluid is controlled by the pressurized fluid control valve 154. Thereafter, the gantry 130 on which the one or more inkjet heads 120 are mounted moves on the printing object 110, and supplies ink on the printing object 110 to form a plurality of desired patterns 114. The plurality of patterns 114 are inspected whether a correct pattern is formed by a plurality of inspection devices (not shown) mounted to the rear of the gantry 130. The plurality of inspection apparatuses (not shown) may be implemented with, for example, a known optical sensor, a known optical system, a CCD camera, a vision camera, or the like. The printing object 110 is positioned on the stage 112 for fixing the printing object 110. In addition, the gantry 130 is movably mounted on the stage 112. The stage 112 is supported by a frame 160. The inkjet printing apparatus 100, the stage 112 on which the printing object 110 is positioned, and the frame 160 constitute an inkjet printing system.

In the above-described inkjet printing apparatus 100 of FIG. 1A, one or more inkjet heads 120 form ink by directly spraying ink onto the printing object 110.

FIG. 1B is a view for explaining in detail a thermal ink-jet head and an operation used in the inkjet printing apparatus according to the prior art shown in FIG.

Referring to FIG. 1B, the thermal inkjet head 120 according to the prior art exemplifies any one of the plurality of inkjet heads 120 according to the prior art shown in FIG. 1A. In the thermal inkjet head 120, when an electric power pulse is applied to the heater 122, the ink in the chamber 124 receives heat and expands instantaneously to form a droplet form through the nozzle 126 ( 128). Thus, when the plurality of inkjet heads 120 shown in FIG. 1A are each implemented with the thermal inkjet head 120 shown in FIG. 1B, the ink droplets 128 may be subjected to instantaneous heating of the heater 122 as described above. It sprays through this nozzle 126, and the desired several pattern 114 is formed.

FIG. 1C is a view for explaining in detail a piezo ink-jet head and an operation used in the inkjet printing apparatus according to the prior art shown in FIG. 1A.

Referring to FIG. 1C, the piezo inkjet head 120 according to the prior art exemplifies any one of the plurality of inkjet heads 120 according to the prior art shown in FIG. 1A. In the piezo inkjet head 120, a piezoelectric driver 123 applies a deformation to the piezoelectric element 121 attached to the inkjet head 120. The applied deformation causes the meniscus 125 in the inkjet head 120 to vibrate so that ink is ejected by forming droplets from the nozzle 126 of the inkjet head 120.

As described above, the ink used for the plurality of inkjet heads 120 shown in FIG. 1A is typically various kinds of photoresist (PR) liquids or metal pastes (hereinafter collectively referred to as "inks"). . In addition, the nozzle 126 of the inkjet head 120 has a narrow size of approximately several to several tens of micrometers in diameter.

The internal pressure of the inkjet head 120 used in the inkjet printing apparatus 100 according to the related art described above has an important effect on the droplet shape and the droplet size of the ink to be ejected. More specifically, when the inkjet head 120 is not used for a long time, ink may leak to the lower portion of the inkjet head 120 by its own gravity. The leaked ink may be cured at the end of the nozzle 126 when the inkjet head 120 is used for a long time or is not used for a long time, or foreign matter may be attached to the ink. Subsequently, when the inkjet head 120 is subsequently used due to such hardening of the leaked ink or adhesion of foreign matters, the ink may not be ejected in the correct spherical shape or the ink may not be ejected in a certain amount.

In order to solve the above-described ink leakage problem, in the prior art, a sound pressure adjusting device for adjusting the inside of the inkjet head to a negative pressure state has been used. Here, the negative pressure generally means a pressure lower than atmospheric pressure. In this case, the intensity of the negative pressure formed inside the inkjet head 120 by the sound pressure regulating device 170 according to the related art has a very important influence on the droplet shape and size of the ink discharged from the inkjet head 120.

1D is a view schematically illustrating a sound pressure adjusting device for adjusting the sound pressure of the inkjet head according to the prior art.

Referring to FIG. 1D, a sound pressure adjusting device 170 for adjusting the sound pressure of the inkjet head 120 according to the related art is connected to the inkjet head 120 and a vacuum is provided to provide sound pressure to the inkjet head 120. A vacuum pump 172 for pumping; A regulator 174 provided between the vacuum pump 172 and the inkjet head 120 to adjust the sound pressure generated from the vacuum pump 172; A sound pressure sensor 178 provided between the regulator 174 and the inkjet head 120 to sense and measure the sound pressure; And a sound pressure monitor 179 connected to the sound pressure sensor 178 and displaying the sound pressure measured by the sound pressure sensor 178. As described above, in the sound pressure control apparatus 170 according to the related art illustrated in FIG. 1D, the regulator 174 is used to adjust the sound pressure generated by the vacuum pump 172. In this case, since the regulator 174 directly adjusts the sound pressure generated by the vacuum pump 172, the range in which the sound pressure can be adjusted is very limited according to the type of the regulator 174 used. Therefore, the sound pressure control by the regulator 174 has a certain limit, as a result it was very difficult to finely adjust the sound pressure.

In addition, in the prior art, since it is difficult to finely adjust the sound pressure, it is difficult for ink to be ejected from the inkjet head into a spherical droplet shape having a constant size, resulting in lowered quality of the final product or higher possibility of defects.

In addition, the problems of sound pressure control as described above are a barrier to the formation of patterns such as electrodes or dots, which require high precision fine line width.

Therefore, a new method for solving the above-mentioned problems is required.

The present invention is to solve the above-mentioned problems of the prior art, an ejector (ejector) for converting a large supply pressure to a fine pressure of the negative pressure in order to precisely control the discharge pressure of the object, such as the inkjet head used in the inkjet printing apparatus Compared to the prior art, it is possible to finely control the sound pressure applied to the object and the ejection pressure of the object, and to precisely control the amount of ink ejected from the object, so that the quality of the final product can be significantly improved. And a method, and an inkjet printing apparatus having the same.

A negative pressure regulating device according to the first aspect of the present invention includes a pump for generating a positive pressure; A regulator connected to the pump and regulating the positive pressure generated from the pump; An ejector having an input connected to the regulator and generating a positive pressure through an output when the positive pressure is input through the input; And a sound pressure sensor provided between the output unit and the object and detecting and measuring the sound pressure.

An inkjet printing apparatus according to a second aspect of the present invention comprises: one or more inkjet heads for supplying ink to form a plurality of patterns on a printing object; A gantry mounted with the at least one inkjet head and movable on the printing object; A plurality of inspection devices mounted to the rear of the gantry and configured to inspect a state of the plurality of patterns formed on the printing object; An ink storage device each connected to the one or more inkjet heads for providing ink; And one or more sound pressure regulating devices connected to each of the one or more ink jet heads, respectively, for adjusting the sound pressure of the one or more ink jet heads, wherein the one or more sound pressure regulating devices each include a pump for generating a positive pressure; A regulator connected to the pump and regulating the positive pressure generated from the pump; An ejector having an input connected to the regulator and generating a positive pressure through an output when the positive pressure is input through the input; And a sound pressure sensor provided between the output unit and each of the one or more inkjet heads to detect and measure the sound pressure.

According to a third aspect of the present invention, there is provided a negative pressure control method comprising: a) generating a positive pressure using a pump; b) generating a vacuum by inputting the generated positive pressure into an ejector; And c) providing a sound pressure generated by the vacuum to the object to maintain the inside of the object at a constant value of vacuum or sound pressure.

The following advantages are achieved by using the sound pressure regulating device and method of the present invention, and an inkjet printing device having the same.

1. Sound pressure is easier to control than the prior art.

2. By using the ejector, it is possible to generate sound pressure with the accuracy of about 1/10 of the supply pressure, so that the fine sound pressure of the object can be controlled.

3. Since fine sound pressure adjustment is possible, the ink discharged from the inkjet head can maintain the shape of a spherical droplet having a constant size. Thus, the quality of the final product and the possibility of defects are significantly lowered.

4. In particular, it is possible to form patterns such as electrodes or dots that require high precision line width.

5. Since the present invention can be applied to a technical field requiring fine control of vacuum pressure in addition to the inkjet head, the scope of application of the present invention is wide.

Further advantages of the present invention can be clearly understood from the following description with reference to the accompanying drawings, in which like or similar reference numerals denote like elements.

1A is a view showing a perspective view of an inkjet printing apparatus according to the prior art.
FIG. 1B is a view for explaining in detail a thermal ink-jet head and an operation used in the inkjet printing apparatus according to the prior art shown in FIG.
FIG. 1C is a view for explaining in detail a piezo ink-jet head and an operation used in the inkjet printing apparatus according to the prior art shown in FIG. 1A.
1D is a view schematically illustrating a sound pressure adjusting device for adjusting the sound pressure of the inkjet head according to the prior art.
Figure 2a is a diagram schematically showing a sound pressure control device according to an embodiment of the present invention.
FIG. 2B is a graph showing data of measuring a change in sound pressure generated according to a change in supply pressure using a sound pressure adjusting device according to an embodiment of the present invention shown in FIG. 2A.
3 is a flowchart illustrating a sound pressure adjusting method according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described with reference to embodiments and drawings of the present invention.

Figure 2a is a diagram schematically showing a sound pressure control device according to an embodiment of the present invention.

Referring to FIG. 2A, the negative pressure control device 270 according to an embodiment of the present invention includes a pump 272 for generating positive pressure; A regulator 274 connected to the pump 272 and regulating the positive pressure generated from the pump 272; An ejector (277) having an input unit (277a) connected to the regulator (274), and generating a sound pressure through an output unit (277b) when the positive pressure is input through the input unit (277a); And a sound pressure sensor 278 provided between the output unit 277b and the object 220 to sense and measure the sound pressure. Here, the object 220 may be, for example, an inkjet head 120 as shown in FIG. 1A.

The sound pressure adjusting device 270 according to an embodiment of the present invention further includes a sound pressure monitor 279 connected to the sound pressure sensor 278 and displaying the sound pressure measured by the sound pressure sensor 278. can do. In addition, the sound pressure control device 270 according to an embodiment of the present invention is provided between the regulator 274 and the ejector 277, the positive pressure sensor 275 for detecting and measuring the positive pressure; And a positive pressure monitor 276 connected to the positive pressure sensor 275 and displaying the positive pressure measured by the positive pressure sensor 275.

The ejector 277 used in the sound pressure control device 270 according to the embodiment of the present invention described above is located at 8th Floor (Postal Code: 150-914), 18-3, Yeouido-dong, Yeouido-dong, Seoul, Korea. It is available from Korea SMC Pneumatic Co., Ltd. (Internet homepage: http://www.smckorea.co.kr). In addition, the positive pressure sensor 275, the negative pressure sensor 278, the positive pressure monitor 276, and the negative pressure monitor 279 are each the eighth floor of Seohyeon Building, 270-1 Seohyeon-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea (Postal Code: 463-824). It is available from Keyence Korea Co., Ltd. (Internet homepage: http://www.keyence.co.kr).

Hereinafter, the specific configuration and operation of the sound pressure control device according to an embodiment of the present invention will be described in detail.

Referring back to Figure 2a, in the negative pressure control device 270 according to an embodiment of the present invention, the pump 272 first generates a positive pressure. The positive pressure generated by the pump 272 is regulated by the regulator 274. The adjusted positive pressure is measured by the positive pressure sensor 275 and displayed on the positive pressure monitor 276. Here, the use of the positive pressure sensor 275 and the positive pressure monitor 276 is not necessarily used as an option.

On the other hand, the positive pressure adjusted by the regulator 274 passes through the ejector 277 to generate a negative pressure. The ejector 277 is a device that generates a vacuum when a positive pressure is input. More specifically, when a positive pressure is input through the input unit 277a of the ejector 277, a vacuum is generated through the output unit 277b. The negative pressure generated by the vacuum generated through the ejector 277 is provided to the object 220 such as an inkjet head. As a result, the inside of the object 220 is maintained a constant value of vacuum or sound pressure. In this case, the sound pressure formed in the vacuum generated by the ejector 277 is measured by the sound pressure sensor 278 connected to the output portion 277b of the ejector 277, and the measured sound pressure is displayed on the sound pressure monitor 279. .

In the sound pressure control device 270 according to the embodiment of the present invention described above, the sound pressure is generated by supplying a positive pressure using the ejector 277. In this case, the correlation between the supplied positive pressure and the generated negative pressure is very important. In order to accurately measure the correlation between the supplied positive pressure and the generated negative pressure, the resolution of the positive pressure sensor 275 measuring positive pressure and the negative pressure sensor 278 measuring negative pressure is important. To this end, as the ejector 277 of the sound pressure control device 270 according to an embodiment of the present invention, the ejector (model name: ZM or ZH series) of the above-described SMC Pneumatic Co., Ltd. is used, and the positive pressure sensor 275 is used. And the sound pressure sensor 278, the positive pressure monitor 276, and the sound pressure monitor 279 are the above-mentioned sensors (model name: AP-44, rated pressure range: +101.3 KPa to -101.3 KPa) and a monitor (model name) : AP-40, rated pressure range: +101.3 KPa to -101.3 KPa, display resolution: 0.2 KPa), and the change of the sound pressure which occurs with the change of supply pressure was measured twice. These measurement results are shown in FIG. 2B described later.

FIG. 2B is a graph showing data of measuring a change in sound pressure generated according to a change in supply pressure using a sound pressure adjusting device according to an embodiment of the present invention shown in FIG. 2A.

Referring to FIG. 2B, two sound pressure measurement results indicate that the sound pressure measurement 1 and the sound pressure measurement 2 have substantially the same linearity between the sound pressures generated by the change in the supply pressure, although there is a difference in the degree due to the error due to the resolution of these measurement equipment. It is shown that it has. According to this substantially identical linearity, a negative pressure of approximately 0.5 KPa occurs for a change in supply pressure of 5 KPa. Therefore, it can be seen that using the sound pressure control device 270 according to an embodiment of the present invention enables generation of sound pressure with an accuracy of about 1/10 of the supply pressure, which is a direct control method of the prior art. Means that the sound pressure can be adjusted with approximately 10 times the precision compared to the sound pressure control device 170.

On the other hand, the inkjet printing apparatus according to an embodiment of the present invention is a sound pressure adjusting device for adjusting the sound pressure of the object 220, such as an inkjet head sound pressure control device 270 according to an embodiment of the present invention shown in Figure 2a ) Is substantially the same as the inkjet printing apparatus 100 shown in FIG. 1A except that is used.

Referring to FIG. 2A together with FIG. 1A, an inkjet printing apparatus according to an embodiment of the present invention may include one or more inkjet heads 220 for supplying ink to form a plurality of patterns 114 on a printing object 110. ; A gantry 130 mounted with the at least one inkjet head 220 and movable on the printing object 110; A plurality of inspection devices (not shown) mounted at the rear of the gantry 130 and configured to inspect a state of the plurality of patterns 114 formed on the printing object 110; An ink storage device 250 connected to each of the one or more inkjet heads 220 for providing ink; And one or more sound pressure adjusting devices 270 connected to each of the one or more inkjet heads 220, respectively, for adjusting sound pressures of the one or more inkjet heads 220. Here, the sound pressure adjusting device 270 is implemented by the sound pressure adjusting device 270 shown in FIG. 2A, and specific components and operations of the sound pressure adjusting device 270 are described in detail with reference to FIG. 2A. In addition, when the sound pressure of one or more inkjet heads 220 is controlled by one sound pressure adjusting device 270, the sound pressures provided to the different inkjet heads 220 may be different from each other, and thus, the one or more inkjet heads 220 may be different. It is preferable that the sound pressure adjusting devices 270 are individually connected to each other so as to adjust the sound pressure of the one or more inkjet heads 220, respectively.

In the sound pressure control device 270 and the inkjet printing apparatus having the same according to an embodiment of the present invention described above, the sound pressure control device 270 adjusts the sound pressure of the object 220 such as an inkjet head. Although shown, those skilled in the art will fully appreciate that the sound pressure regulating device 270 according to one embodiment of the present invention may be applied to any object for which fine adjustment of the vacuum pressure is required.

3 is a flowchart illustrating a sound pressure adjusting method according to an embodiment of the present invention.

Referring to FIG. 3 together with FIG. 2A, a sound pressure adjusting method 300 according to an embodiment of the present invention includes a) generating a positive pressure using a pump 272; b) generating (320) a vacuum by inputting the generated positive pressure into an ejector (277); And c) providing the sound pressure generated by the vacuum to the object 220 to maintain the inside of the object 220 at a constant value of vacuum or sound pressure (330). The object 220 may be, for example, the inkjet head 120 shown in FIG. 1A.

In addition, the sound pressure control method 300 according to an embodiment of the present invention comprises the steps of b1) detecting and measuring the sound pressure (322) between the step b) and the c); And b2) displaying 324 the measured sound pressure.

In addition, the sound pressure control method 300 according to an embodiment of the present invention comprises the steps of: a1) detecting and measuring the positive pressure (312) between the steps a) and b); And a2) displaying 314 the measured positive pressure.

Various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims. It is not. Accordingly, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be determined only in accordance with the following claims and their equivalents.

100: inkjet printing apparatus 110: printing object 112: stage 114: pattern
120: inkjet head 121: piezoelectric element 122: heater 123: piezoelectric drive device 124: chamber
125: meniscus 126: nozzle 128: droplet form 130: gantry 150: ink storage device
152: ink supply main conduits 152a, 152b, 152c, 152d and 152e: branch conduits
154: pressurized fluid control valve 156a, 156b, 156c, 156d, 156e: control valve
160: frame 170,270: sound pressure regulating device 172: vacuum pump
174,274 Regulator 178,278 Sound pressure sensor
179,279: Sound pressure monitor 220: Object 272: Pump
275 Positive Pressure Sensor 276 Positive Pressure Monitor 277: Ejector
277a: input unit 277b: output unit

Claims (12)

In the sound pressure regulating device,
A pump for generating positive pressure;
A regulator connected to the pump and regulating the positive pressure generated from the pump;
An ejector having an input connected to the regulator and generating a positive pressure through an output when the positive pressure is input through the input; And
A sound pressure sensor provided between the output unit and the object and detecting and measuring the sound pressure
Sound pressure control device comprising a. The method of claim 1,
The sound pressure regulating device further includes a sound pressure monitor connected to the sound pressure sensor and displaying the sound pressure measured by the sound pressure sensor. The method of claim 1,
The sound pressure control device
A positive pressure sensor provided between the regulator and the ejector to sense and measure the positive pressure; And
Positive pressure monitor connected to the positive pressure sensor and displaying the positive pressure measured by the positive pressure sensor
Sound pressure control device further comprising. The method of claim 2,
The sound pressure control device
A positive pressure sensor provided between the regulator and the ejector to sense and measure the positive pressure; And
Positive pressure monitor connected to the positive pressure sensor and displaying the positive pressure measured by the positive pressure sensor
Sound pressure control device further comprising. The method according to any one of claims 1 to 4,
Sound pressure control device wherein the object is an inkjet head. In an inkjet printing apparatus,
One or more inkjet heads for supplying ink to form a plurality of patterns on a printing object;
A gantry mounted with the at least one inkjet head and movable on the printing object;
A plurality of inspection devices mounted to the rear of the gantry and configured to inspect a state of the plurality of patterns formed on the printing object;
An ink storage device each connected to the one or more inkjet heads for providing ink; And
One or more sound pressure regulating devices connected to each of the one or more inkjet heads, respectively, for adjusting sound pressure of the one or more inkjet heads.
Including,
Each of the one or more sound pressure control device
A pump for generating positive pressure;
A regulator connected to the pump and regulating the positive pressure generated from the pump;
An ejector having an input connected to the regulator and generating a positive pressure through an output when the positive pressure is input through the input; And
A sound pressure sensor provided between the output unit and each of the one or more inkjet heads, the sound pressure sensor sensing and measuring the sound pressure
Containing
Inkjet printing device. The method according to claim 6,
The sound pressure control device is connected to the sound pressure sensor, the inkjet printing device further comprises a sound pressure monitor for displaying the sound pressure measured by the sound pressure sensor. 8. The method according to claim 6 or 7,
The sound pressure control device
A positive pressure sensor provided between the regulator and the ejector to sense and measure the positive pressure; And
Positive pressure monitor connected to the positive pressure sensor and displaying the positive pressure measured by the positive pressure sensor
Inkjet printing device further comprising. In the sound pressure adjustment method,
a) generating a positive pressure using a pump;
b) generating a vacuum by inputting the generated positive pressure into an ejector; And
c) providing a negative pressure generated by the vacuum to the object to maintain the interior of the object at a constant value of vacuum or sound pressure
Sound pressure adjustment method comprising a. The method of claim 9,
The sound pressure control method is between the step b) and the c)
b1) detecting and measuring the sound pressure; And
b2) displaying the measured sound pressure
Sound pressure control method further comprising. 11. The method according to claim 9 or 10,
The sound pressure control method is between the step a) and the b)
a1) detecting and measuring the positive pressure; And
a2) displaying the measured positive pressure
Sound pressure control method further comprising. 11. The method according to claim 9 or 10,
Sound pressure control method wherein the object is an inkjet head.
KR20100072269A 2010-07-27 2010-07-27 Device and Method of Controlling Negative Pressure, and Ink-jet Printing Apparatus Having the Same KR101187281B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200420482Y1 (en) 2006-04-20 2006-07-04 김성현 carburetor tester
JP2006192785A (en) 2005-01-14 2006-07-27 Sharp Corp Fluid ejector, inkjet printer, and control method of fluid ejector
JP2006327100A (en) 2005-05-27 2006-12-07 Brother Ind Ltd Inkjet recorder
JP2007253402A (en) 2006-03-22 2007-10-04 Hioki Ee Corp Ink supply device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006192785A (en) 2005-01-14 2006-07-27 Sharp Corp Fluid ejector, inkjet printer, and control method of fluid ejector
JP2006327100A (en) 2005-05-27 2006-12-07 Brother Ind Ltd Inkjet recorder
JP2007253402A (en) 2006-03-22 2007-10-04 Hioki Ee Corp Ink supply device
KR200420482Y1 (en) 2006-04-20 2006-07-04 김성현 carburetor tester

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