KR102285365B1 - Loading apparatus of open mask for oled - Google Patents

Abstract

The present invention is an open mask loading device for organic light emitting diodes that, when an external open mask is adsorbed and loaded by magnetic force, is transported to the top of the mask frame inside the open mask welding machine by a crane and unloaded by removing the magnetic force. It relates to an open mask loading device for an organic light emitting diode that loads/unloads by approaching/removing a magnet.

Description

Open mask loading device for organic light emitting diodes {LOADING APPARATUS OF OPEN MASK FOR OLED}

The present invention is an open mask loading device for organic light emitting diodes that, when an external open mask is adsorbed and loaded by magnetic force, is transported to the top of the mask frame inside the open mask welding machine by a crane and unloaded by removing the magnetic force. It relates to an open mask loading device for an organic light emitting diode that loads/unloads by approaching/removing a magnet.

There are Fine Metal Mask (FMM) and Open Mask, which are thin metal films, essential for the production of OLED (organic material that emits light when an electric current) is used for screens of smartphones and TVs.

That is, two types of masks are used simultaneously in the organic light emitting diode (OLED) deposition process. It is a shadow mask (FMM) perforated with micrometers (μm) and an open mask with large perforations in the form of individual panels.

OLED for smartphones uses FMM deposition technology, and OLED for TV uses open mask deposition technology.

FMM is a thin metal thin film that is constantly drilled with microscopic holes that are invisible to the naked eye. When this FMM is applied to the OLED panel and the pixel forming material is sprayed, the pixel forming material settles on the panel surface at a certain size and spacing.

The open mask is a large hole in the form of an individual panel (cell unit type), and is used for deposition technology on the OLED panel.

These FMMs or open masks are fixed by laser welding to the mask frame in the form of a ledger or a split sheet, and then deposition technology is used. In the case of an open mask, a led mask is mainly welded and fixed to the mask frame in the form of a split mask in the case of an FMM.

An open mask is welded and fixed to the mask frame by laser welding in an open mask welding machine.

The open mask welding machine is an equipment that fixes and tensions the open mask on the mask frame without sagging when depositing OLED pixels.

This equipment welds an open mask (or mask sheet) to a mask frame to deposit a common layer (HIL, HTL, ETL, EIL, cathode) during the OLED process.

The sheet used at this time is usually composed of one ledger mask sheet rather than a divided sheet.

To weld the ledger sheet onto the mask frame, hold (clamp) and pull (tensile) the ledger sheet in all directions (all four sides) using a clamp, a tension device to ensure flatness and deflection, to ensure flatness and deflection, and monitor using a measuring device This is an equipment that checks whether the ledger sheet is accurately tensioned to the set position and welds it to the mask frame with a laser welding unit.

Such an open mask is usually loaded by vacuum suction and then transferred to the inside of the open mask welding machine through a crane, and then unloaded on the mask frame.

That is, vacuum adsorption is performed only at the edge so as not to interfere with the active area of the sheet and the ribs. The pad area avoids areas that affect vacuum adsorption, such as alignment holes and cell unit holes formed on the edge due to design changes, etc. As the gap between the pad and the pad that vacuum adsorbs is inevitably widened, the adsorption force is reduced compared to adsorbing the entire edge. There is a problem that the wave is generated.

In addition, due to the difference in the sheet active area (cell unit area) for each model, interference with the vacuum pad occurs, and if there is even a small hole in the vacuum adsorption area, a problem of leakage occurs.

Due to the above problem, the clamp does not properly clamp the mask sheet when the mask sheet is held and tensioned after the mask sheet is transferred over the mask frame, which affects the overall welding result data.

Korean Patent Publication No. 10-2010-0043309 Korean Patent Publication No. 10-2011-0046780

The present invention has been devised to solve the above problems, and any open mask having a region that affects vacuum adsorption at the place to be loaded due to various design changes is stably and uniformly without problems such as waves and leaks that may occur during sheet adsorption. An object of the present invention is to provide an open mask loading device for an organic light emitting diode that can be loaded with one force and unloaded on a mask frame.

In order to achieve the above object, the open mask loading apparatus for an organic light emitting diode according to claim 1 according to the present invention is an open mask for an organic light emitting diode that loads the open mask M and unloads it in the open mask welding machine 1 . As the loading device 100 , between the base plate 110 and the non-magnetic stopper 130 disposed to face at least under the edge of the base plate 110 , and the base plate 110 and the non-magnetic stopper 130 . The magnet unit 150 disposed, the approach/removal member 170 that is installed on the base plate 110 and approaches/removes the magnet unit 150 with respect to the non-magnetic stopper 130, and the non-magnetic stopper 130 and a support member 190 for supporting the base plate 110 .

In the open mask loading device for an organic light emitting diode according to claim 2 according to the present invention, the non-magnetic stopper 130 includes a urethane layer 131 on an upper layer and a non-metal layer 133 on a lower layer.

In the open mask loading apparatus for an organic light emitting diode according to claim 3 according to the present invention, the magnet unit 150 includes a plurality of permanent magnets 151 disposed at predetermined intervals, and a support cap for supporting the plurality of permanent magnets 151 . Including (153), the lower ends of the plurality of permanent magnets 151 are arranged to protrude slightly lower than the lower ends of the support caps 153 (h).

In the open mask loading apparatus for an organic light emitting diode according to claim 4 according to the present invention, the approach/exit member 170 includes an actuator 171 installed on the upper surface of the base plate 110, an actuator 171 and a magnet unit ( 150) includes a movable connection part 173 connecting between, and the actuator 171 is a cylinder 171a fixed to the base plate 110, and a piston 171b that is up/down from the upper side of the cylinder 171a. is configured, and the movable connection part 173 is a movable horizontal bar (173a) fixed to the upper end of the piston (171b), and a movable vertical bar (173b) connecting both sides of the movable horizontal bar (173a) and the support cap (153). However, the movable vertical bar (173b) is guided up/down through the guide hole (111) formed in the base plate (110).

In the open mask loading apparatus for an organic light emitting diode according to claim 5 according to the present invention, the support member 190 includes a connecting bar 191 connecting between the base plate 110 and the non-magnetic stopper 130 and the base plate ( 110) and includes an elastic pressing part 193 for elastically pressing the connecting bar 191, and the elastic pressing part 193 includes an elastic cap 193a installed on the upper surface of the base plate 110, and an elastic cap. It includes a spring (not shown) mounted on the 193a, and the connecting bar 191 is guided up/down through a guide hole (not shown) formed in the base plate 110 .

According to the present invention, the following effects are obtained.

Since the open mask is loaded/unloaded by magnetic adsorption/release according to the distance of the magnet, it is possible to accurately load even if a hole is formed in the position to be adsorbed due to various design changes.

In particular, due to the loading by magnetic force without leakage due to vacuum adsorption, most of the edges of the open mask are adsorbed with a uniform force and lifted up uniformly, so that no wave is generated, so even when unloading later, the clamping is performed accurately. Welding result data is good.

A uniform magnetic force can be transmitted to the open mask because the magnetic unit loads/unloads according to the up/down linear distance with respect to the open mask.

Since the magnet unit descends and magnetically adsorbs the open mask with the non-magnetic stopper pressed in close contact, there is no open space (gap) between the open mask and the non-magnetic stopper, so that it can be loaded with a uniform magnetic force.

The urethane layer, which is the upper layer of the non-magnetic stopper, acts as a buffer by elastic deformation when the magnet of the magnet unit touches it, thereby preventing scratches or deformation of the non-metal layer, which is the lower layer.

In addition, since the elastic pressing unit is installed to elastically press the non-magnetic stopper, it is prevented that the non-magnetic stopper is forcibly pressed against the open mask.

1 is a schematic side view for explaining the layout of an open mask welding machine for OLED according to a preferred embodiment of the present invention.
2, 3 and 4 are a front view, a plan view and a bottom perspective view showing a state in which the loading device of the open mask for OLED according to the present invention is brought down from the crane and the bottom of the stopper is in close contact with the open mask.
5 is a cross-sectional view taken along line 5-5 of FIG. 3;
6 and 7 are a front view and a bottom perspective view showing a loading preparation state in which the magnet descended from the state of FIG. 5 is in contact with the upper surface of the stopper.
Fig. 8 is a cross-sectional view taken along line 8-8 of Fig. 7;

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

1 is a schematic side view for explaining the layout of an open mask welding machine for OLED according to a preferred embodiment of the present invention, and FIGS. 2, 3 and 4 are the loading device of the open mask for OLED according to the present invention coming down from the crane It is a front view, a top view, and a bottom perspective view showing a state in which the bottom of the stopper is in close contact by pressing the open mask, FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. It is a front view and a bottom perspective view showing a loading preparation state in which a magnet is in contact with the upper surface of the stopper, and FIG. 8 is a cross-sectional view taken along line 8-8 of FIG.

As shown in FIG. 1 , the open mask welding system for OLED according to the present embodiment opens the open mask M of the open mask welding machine 1 , the open mask mounting table 3 , and the open mask mounting table 3 . It includes a crane (5) for transporting to the mask welding machine (1).

The open mask M is a rectangular (or rectangular) sheet of thin metal plate, and is placed on one side of the open mask welding machine 1 in a state where each sheet is placed on the open mask mounting table 3 .

The crane 5 includes an open mask loading device 100 for loading the open mask M of the open mask mounting table 3 .

The open mask loading device 100 is supported on the up/down cylinder 7 of the crane 5 .

The loaded open mask M is unloaded on the mask frame MF seated inside the open mask welding machine 1 and then aligned and laser welded.

The mask frame MF, like the open mask M, is loaded by inserting the edge facing from the mounting table 3 into the arm A, then transported by the crane 5 and unloaded on the stage of the open mask welding machine 1 to load

The open mask loading device 100 is, as shown in FIGS. 2 to 5 , a base plate 110 supported by the up/down cylinder 7 of the crane 5 , and an edge of the base plate 110 under the The non-magnetic stopper 130 is arranged, the magnet unit 150 is arranged between the base plate 110 and the non-magnetic stopper 130, and the magnet unit 150 is installed on the base plate 110 to prevent the magnet unit 150 from being a non-magnetic stopper. It includes an access/removal member 170 that approaches/exits with respect to 130 , and a support member 190 that supports the non-magnetic stopper 130 to the base plate 110 .

The base plate 110 is a square (or rectangular) same as the open mask M, and the width thereof is preferably a size that falls within the area of the open mask M.

This requires an edge that is not adsorbed as shown in FIG. 2, because a place to clamp the loaded open mask M with a clamp (not shown) before unloading it on the mask frame MP is required.

The non-magnetic stopper 130 has a band shape arranged to press the four edges of the open mask M as in the present embodiment, but may be arranged to press at least two parallelly facing sides.

The non-magnetic stopper 130 serves to not only adsorb uniformly in close contact with the open mask M, but also prevent the open mask M from coming up while the magnet unit 150 is descending.

The non-magnetic stopper 130 is made of two layers, the upper layer is composed of a urethane layer 131 and the lower layer is composed of a non-metal layer 133 .

The non-magnetic stopper 130 may be made by injection molding the urethane layer 131 with the non-metal layer 133 inserted therein, or bonding the two layers with an adhesive by heating and pressing.

The non-metal layer 133 is a contact stopper that directly presses the open mask M in close contact, and is preferably made of a non-magnetic aluminum material.

The stopper 133 made of aluminum is non-magnetic, has very good workability, and has excellent rigidity.

Of course, it can be used as a plastic material, but it has poor workability compared to aluminum, and scratches or deformations occur in the repeated process of pressing and adhering, so there is a high possibility that it will not be magnetically adsorbed uniformly during loading.

The urethane layer 131 serves as a buffer to prevent the magnet unit 150, which will be described later, from pushing down forcefully due to elastic deformation when it comes into contact with it.

The magnet unit 150 is disposed to face the non-magnetic stopper 130 up and down.

That is, the magnet unit 150 includes a plurality of permanent magnets 151 and a plurality of permanent magnets 151 disposed at predetermined intervals along the edge of the open mask M, as shown in FIGS. 4 and 5 . and a support cap 153 for supporting it.

The support cap 153 is in the shape of a long and thin box with a perforated lower surface.

The lower ends of the plurality of permanent magnets 151 are arranged to protrude slightly lower than the lower ends of the support caps 153, as shown in FIGS.

Two or more of these magnet units 150 are arranged according to the width of the edge of the open mask (M).

Of course, if the magnet unit 150 is a plurality, the non-magnetic stopper 130 and the approach/exit member 170 and the support member 190 are also arranged in plurality.

The approach/exit member 170 includes an actuator 171 installed on the upper surface of the base plate 110 , and a movable connection part 173 connecting the actuator 171 and the magnet unit 150 .

The actuator 171 is an air cylinder of an up/down type consisting of a cylinder 171a fixed to the base plate 110 and a piston 171b that is up/down from the upper side of the cylinder 171a.

2 to 5 illustrate a state in which the magnet unit 150 is moved away from the non-magnetic stopper 130 when the piston 171b is in an up (push-up) state.

6 to 8 show a state in which the magnet unit 150 is in contact with the non-magnetic stopper 130 when the piston 171b is in a down (pulled down) state.

The movable connection part 173 includes a movable horizontal bar (173a) fixed to the upper end of the piston (171b) and a movable vertical bar (173b) connecting both sides of the movable horizontal bar (173a) and the support cap (153). It has a gantry shape.

The movable vertical bar 173b is guided up/down through the guide holes 111 drilled up and down in the base plate 110 .

The support member 190 includes a connection bar 191 connecting the base plate 110 and the non-magnetic stopper 130 .

In addition, the support member 190 includes an elastic pressing part 193 installed on the base plate 110 to elastically press the connecting bar 191 .

The elastic pressing unit 193 includes an elastic cap 193a installed on the upper surface of the base plate 110 and a spring (not shown) mounted on the elastic cap 193a.

The lower end of the connecting bar 191 is fixed to the non-magnetic stopper 130 , and the upper end of the connecting bar 191 is installed to receive elastic pressure from the spring (not shown).

In order to transmit the elastic pressurization of the spring to the connecting bar 191, a guide hole (not shown) for guiding the up/down of the connecting bar 191 like the movable vertical bar 173b is provided on the base plate 110 up and down. is perforated

Hereinafter, an operation of loading and unloading the open mask M using the open mask loading apparatus 100 for OLED according to the present embodiment will be described.

First, as shown in FIG. 1 , an open mask loading apparatus 100 for OLED is disposed above the open mask mounting table 3 .

In this state, when the open mask loading device 100 for OLED descends by the operation of the up/down cylinder 7 of the crane 7, the non-magnetic stopper 130 opens the mask M as shown in FIGS. 2 and 5 . Press the edge of the open mask (M) and the non-magnetic stopper 130 is in close contact.

In the close contact state, as shown in FIGS. 6 and 8, the magnet unit 150 is lowered toward the non-magnetic stopper 130 by the operation of the approach/exit member 170 as shown in FIGS. 131).

Then, the open mask M and the permanent magnet 151 become very close to each other so that they are adsorbed and loaded onto the non-magnetic aluminum layer 133 by magnetic force.

In the state of adsorption loading by magnetic force, the open mask loading device 100 for OLED is lifted in the form as shown in FIG. 1 by the up/down cylinder 7 of the crane 5 .

In a state in which the open mask loading device 100 for OLED loaded with the open mask M is lifted, the crane 5 transports it into the open mask welding machine 1 .

The unloading on the mask frame (not shown) of the open mask (M), on the contrary, by raising the magnet unit 150 up the non-magnetic stopper 130 and the distance away to release the magnetic attraction.

As described above, although described with reference to preferred embodiments of the present invention, those of ordinary skill in the art may vary the present invention within the scope without departing from the spirit and scope of the present invention described in the following claims. It can be implemented by changing or modifying it.

For example, although it has been described that the open mask loading apparatus 100 for OLED of this embodiment is used for loading/unloading of the open mask M, it is also applicable to loading/unloading of the fine metal mask (FMM), and the mask is the ledger. It is applicable to either a mask (loading/unloading four sides) or a split mask (loading/unloading opposite sides).

1: open mask welding machine 3: open mask mounting table
5: Crane 7: Up/Down Cylinder
100: OLED open mask loading device 110: base plate
111: guide hole 130: non-magnetic stopper
131: urethane layer 133: non-metal (AL) layer
150: magnet unit 151: permanent magnet
153: support cap 170: access / exit member
171: actuator 171a: air cylinder
171b: piston 173: movable connection part
173a: movable horizontal bar 173b: movable vertical bar
190: support member 191: connecting bar
193: elastic pressing part 193a: elastic cap
M : open mask MF : mask frame

Claims (5)

An open mask loading apparatus 100 for an organic light emitting diode that loads and unloads the open mask M in the open mask welding machine 1,
a base plate 110 and
A non-magnetic stopper 130 disposed to face at least under the edge of the base plate 110,
A magnet unit 150 disposed between the base plate 110 and the non-magnetic stopper 130,
An access/removal member 170 installed on the base plate 110 to access/retract the magnet unit 150 with respect to the non-magnetic stopper 130, and
Including a support member 190 for supporting the non-magnetic stopper 130 to the base plate 110,
The access/exit member 170 includes an actuator 171 installed on the upper surface of the base plate 110, and a movable connection part 173 connecting the actuator 171 and the magnet unit 150,
Actuator 171 is composed of a cylinder (171a) fixed to the base plate 110, and a piston (171b) up / down from the upper side of the cylinder (171a),
The movable connection part 173 includes a movable horizontal bar (173a) fixed to the upper end of the piston (171b) and a movable vertical bar (173b) connecting both sides of the movable horizontal bar (173a) and the support cap (153). ,
The movable vertical bar 173b is an open mask loading device for an organic light emitting diode that is guided up/down through the guide hole 111 formed in the base plate 110 .
The method according to claim 1,
The non-magnetic stopper 130 is an open mask loading device for an organic light emitting diode composed of an upper layer of a urethane layer 131 and a lower layer of a non-metal layer 133 .
The method according to claim 1,
The magnet unit 150 includes a plurality of permanent magnets 151 disposed at predetermined intervals, and a support cap 153 for supporting the plurality of permanent magnets 151,
The lower end of the plurality of permanent magnets 151 is an open mask loading device for an organic light emitting diode which is disposed to protrude (h) slightly lower than the lower end of the support cap 153 .
delete The method according to claim 1,
The support member 190 includes a connecting bar 191 connecting between the base plate 110 and the non-magnetic stopper 130, and an elastic pressing part installed on the base plate 110 to elastically press the connecting bar 191 ( 193),
The elastic pressing unit 193 includes an elastic cap 193a installed on the upper surface of the base plate 110 and a spring (not shown) mounted on the elastic cap 193a,
The connecting bar 191 is an open mask loading device for an organic light emitting diode that is guided up/down through a guide hole (not shown) formed in the base plate 110 .

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