KR102540043B1 - Bending testing apparatus of ultra thin glass with crack detection - Google Patents

Abstract

The present invention relates to an ultra-thin glass bending test apparatus equipped with a crack detection function, and more particularly, detects cracks caused by folding of the ultra-thin glass during a bending test of the ultra-thin glass, so that the broken ultra-thin glass is removed from the subsequent process. The present invention relates to an ultra-thin glass bending test apparatus having a break detection function capable of ensuring the integrity of an apparatus for a process of ultra-thin glass by preventing it from being transmitted to an ultra-thin glass.
The ultra-thin glass bending test apparatus having a break detection function according to the present invention for solving the above problems is installed near the bending module of the bending test unit, and detects the sound generated according to the break of the ultra-thin glass to detect the breakage of the ultra-thin glass. It is characterized in that it comprises a sound detection module for detecting.

Description

Ultra-thin glass bending test apparatus with crack detection function {BENDING TESTING APPARATUS OF ULTRA THIN GLASS WITH CRACK DETECTION}

The present invention relates to an ultra-thin glass bending test apparatus equipped with a crack detection function, and more particularly, detects cracks caused by folding of the ultra-thin glass during a bending test of the ultra-thin glass, so that the broken ultra-thin glass is removed from the subsequent process. The present invention relates to an ultra-thin glass bending test apparatus having a break detection function capable of ensuring the integrity of an apparatus for a process of ultra-thin glass by preventing it from being transmitted to an ultra-thin glass.

Recently, electrical and electronic technologies are developing rapidly, and various types of display products are emerging to meet the needs of the new era and various consumers. Accordingly, demand for flexible glass articles (displays) is increasing in order to be used in various application products requiring flexible and bendable glass (glass).

A flexible display is formed by forming a display unit including thin film transistors and wires on a flexible flexible substrate, and can display images even if it is bent like paper, but has difficulty in being manufactured very thinly.

To meet these demands, ultra-thin glass has been developed, and the developed ultra-thin glass is used in various display fields such as foldable displays, rollable displays, and bent displays.

Accordingly, the mechanical reliability of the ultra-thin glass applied to the flexible display is determined by repeatedly bending the bending area of the ultra-thin glass to check for peeling between thin films and cracks in the thin film provided in the bending area. to test its performance.

As an apparatus for a bending test of a flexible display, a bending test apparatus of a flexible display is disclosed in Publication No. 10-2018-0000130.

In addition, Patent Registration No. 10-2053319 discloses a flexible display folding device.

The above technologies are devices capable of testing the folding (bending) of a flexible display placed thereon, and are configured to test the limit of stress for bending of the flexible display.

However, cracks (or cracks) of the ultra-thin glass may occur during a folding (bending) test of the flexible display (hereinafter, referred to as 'ultra-thin glass'). At this time, the bending test is performed by placing the ultra-thin glass on a bending machine configured to fold a pair of bending panels (adsorption plates) facing each other. It is difficult to confirm by photographing, and moreover, since the cracked area is very local, it is very difficult to confirm the crack.

In addition, fragments of the ultra-thin glass broken during the bending test may scatter and cause safety problems, and the cracked ultra-thin glass is transported to the device of the subsequent process and transferred to the device of the subsequent process. It may cause damage to the device for the purpose, and it is difficult to guarantee the safety of work.

Patent Publication No. 10-2018-0000130 (2018. 01. 02.) Registered Patent Publication No. 10-2053319 (2019. 12. 02.)

The present invention has been made to solve the above problems, and the problem to be solved in the present invention is to provide an ultra-thin glass bending test apparatus equipped with a break detection function capable of detecting the breakage of the ultra-thin glass during the bending test process of the ultra-thin glass. is to do

Another object of the present invention is to provide an ultra-thin glass bending test apparatus having a break detection function capable of ensuring the integrity of subsequent process equipment and ensuring the safety of workers by detecting cracks in the ultra-thin glass.

The ultra-thin glass bending test apparatus having a break detection function according to the present invention for solving the above problems is installed near the bending module of the bending test unit, and detects the sound generated according to the break of the ultra-thin glass to detect the breakage of the ultra-thin glass. It is characterized in that it comprises a sound detection module for detecting.

Here, the sound detection module is characterized in that it is activated while a bending test is performed in the bending module.

In addition, the sound detection module may include a microphone for detecting sound; an amplifier for amplifying the sound signal output from the microphone; a band pass filter for filtering the sound signal output from the amplifier; a detection unit determining whether the ultra-thin glass is broken based on the sound signal output from the band pass filter and outputting a signal; and a sound collecting cover for inducing the generated sound signal to the microphone.

In addition, the sound detection module may further include a variable resistor for controlling an amplification amount of the amplifier.

In addition, when the sound detection module detects sound generated by the breaking of the ultra-thin glass, the sound detection module outputs a breaking signal so that the garbage can module operates.

According to the present invention, since cracking of the ultra-thin glass can be immediately confirmed by detecting the cracking of the ultra-thin glass during a bending test of the ultra-thin glass, there is an advantage in preventing safety accidents in advance.

In addition, as the ultra-thin glass is broken immediately, fragments are prevented from entering the subsequent process equipment, thereby minimizing the idle time of the process equipment due to the breakage of the ultra-thin glass, thereby maintaining optimal operation time.

1 is a perspective view of a bending test unit of an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
2 is a right side view of the bending test unit of the ultra-thin glass bending test apparatus having a break detection function according to the present invention;
3 is an exploded perspective view of a part of the bending test unit of the ultra-thin glass bending test apparatus having a break detection function according to the present invention;
4 and 5 are a perspective view and a partially exploded perspective view of a bending module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
6 is an exploded perspective view of a bending module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
7 is an exploded perspective view of a second bending base applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
8 is a perspective view of a second bending unit applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
9 is a side view of the operation of a bending unit applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
10 is a side view schematically showing the operating state of FIG. 9;
11 is a perspective view of a GabbageCan module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention;
12 is a perspective view of an inspection module applied to an ultra-thin glass bending test apparatus having a crack detection function according to the present invention;
13 and 14 are a perspective view and a partially exploded perspective view of a sound detection module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention, respectively;
15 is a view showing the configuration of a sound detection module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

Next, a preferred embodiment of an ultra-thin glass bending test apparatus having a crack detection function according to the present invention will be described in detail with reference to the drawings.

Hereinafter, the same reference numerals are used for technical elements that perform the same function, and repeated detailed descriptions are omitted to avoid redundant description.

In addition, the embodiments described below are shown by way of example to effectively show preferred embodiments of the present invention, and should not be construed to limit the scope of the present invention.

The present invention detects cracks caused by folding of the ultra-thin glass during a bending test of the ultra-thin glass and prevents the broken ultra-thin glass from being transferred to the subsequent process, thereby securing the integrity of the apparatus for the ultra-thin glass process. It relates to an ultra-thin glass bending tester equipped with a crack detection function.

1 shows a perspective view of a bending test unit of an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

The bending test apparatus includes a bending test unit 10 that bends and tests the ultra-thin glass, a loading unit (not shown in the drawing) for injecting the ultra-thin glass, and an unloading unit (not shown in the drawing) for discharging the tested ultra-thin glass. can do.

The loading unit includes an articulated robot module in which a cassette accommodating ultra-thin glass is inserted, and an articulated robot module that picks up the ultra-thin glass accommodated in the cassette, and a vision module that detects the appearance and position of the ultra-thin glass picked up by the articulated robot module. can be configured.

In addition, the unloading unit picks up the ultra-thin glass judged to pass the bending test in the bending test unit 10 and accommodates it in the cassette, and the external inspection and location of the ultra-thin glass picked up by the multi-joint robot module. It may be configured to include a vision module and the like for detecting.

Accordingly, drawings and detailed descriptions of the loading unit and the unloading unit are omitted.

2 is a right side view of the bending test unit of the ultra-thin glass bending test apparatus having a break detection function according to the present invention, and FIG. 3 shows a partially exploded perspective view of the bending test unit.

1 to 3, the bending test unit 10 includes a bending module 100, a garbage can module 200, an inspection module 300, and a sound detection module 400. It is composed by

The bending module 100 performs a bending test by bending the ultra-thin glass supplied from the loading unit, and is configured to be long from the front (loading unit) side to the rear (unloading unit) side, and the garbage can module 200 is disposed below the bending module 100, and the inspection module 300 is disposed behind the garbage can module 200.

In addition, the sound detection module 400 is disposed at a position close to the bending module 100 to detect sound (sound) according to the breaking of the ultra-thin glass during a bending test of the ultra-thin glass by the bending module 100. It should be.

Accordingly, it is preferable that the sound detection module 400 is disposed on the inner upper end of the garbage can module 300 .

In the present invention, the bending test unit 10 shows a bending test unit having a duplex configuration so that two ultra-thin glasses can be bent, and the bending module 100 consists of two bending modules connected from the front to the rear, According to the bending module of the double, the garbage can module 200 is also configured as a double. In the above configuration, the inspection module may be configured to be vertically movable in the front and rear directions so that the ultra-thin glass subjected to the bending test can be inspected while moving left and right in the bending module configured as a double unit.

In addition, the drop box 11 in FIGS. 1 to 3 is a box for dropping and discarding ultra-thin glass judged to be defective, and one pair is disposed at the front and rear, respectively.

4 and 5 show a perspective view and a partially exploded perspective view of a bending module applied to an ultra-thin glass bending test apparatus having a crack detection function according to the present invention.

4 and 5, the bending module 100 connects a plurality of vertical frames 101 and the vertical frames 101 in order to be disposed on the upper side of the garbage can module 200 to be described later. It is installed on a frame frame constructed using a plurality of horizontal frames 102 that do. At this time, although the same configuration is composed of doubles in which two identical configurations are arranged so that the two ultra-thin glasses can be alternately subjected to a bending test from the front to the rear side, it will be natural that they can be configured as singles.

Accordingly, a description of the remaining configurations will be omitted as a description of one configuration selected from among the double configurations.

6 is an exploded perspective view of a bending module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

6, the bending module 100 applied to the ultra-thin glass bending test apparatus having a crack detection function according to the present invention moves along a rail 110 extending from the front side to the rear side and the rail 110. a moving table 120, a first bending base 130 and a second bending base 140 coupled to the lower side of the moving table 120, and a first coupled to the lower side of the first bending base 130. It is configured to include a bending unit 150 and a second bending unit 160 coupled to the lower side of the second bending base 140 .

The moving table 120 moves along the rail 110 to control the positions of the first bending unit 150 and the second bending unit 160 . For example, in a state where ultra-thin glass is adsorbed, the positions of the first bending unit 150 and the second bending unit 160 are moved to be located on the upper side of the garbage can module 200 so that a bending test is performed. And, in the state where the ultra-thin glass is adsorbed, the positions of the first bending unit 150 and the second bending unit 160 are positioned on the upper side of the inspection module 300 so that the inspection is performed.

The first bending base 130 and the second bending base 140 are disposed between the moving table 120 and the bending units 150 and 160, respectively, and the second bending base 140 is configured to be slidable. .

7 is an exploded perspective view of a second bending base applied to an ultra-thin glass bending test apparatus having a crack detection function according to the present invention.

Referring to FIG. 7, the second bending base 140 includes an upper plate 141, a moving plate 142a that slides according to rotation, and a slider 142 coupled to the lower portion of the upper plate 141. , a clearance adjusting motor 143 providing rotational force to the moving plate 142a and a lower bracket 144 disposed below the slider 142 and coupled to the moving plate 142a.

According to the above configuration, the moving plate 142a of the second bending base 140 approaches or moves away from the first bending base 130 by the rotational force of the clearance adjusting motor 143 . Accordingly, the second bending unit 160 coupled to the lower portion of the second bending base 140 approaches or is separated from the first bending unit 150, and the sliding operation of the second bending unit 160 As a result, the first bending unit 150 and the second bending unit 160 can change the bending curvature of the ultra-thin glass for a bending test (folding).

The first bending unit 150 and the second bending unit 160 are bent according to the operation to perform a bending test on the ultra-thin glass. In this case, the first bending unit 150 and the second bending unit 160 may have the same structure, but may be configured to be point symmetrical to each other so as not to receive interference due to a bending operation.

8 is a perspective view of a second bending unit applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

8, the second bending unit 160 is coupled to the upper plate 161 coupled to the lower bracket 144 of the second bending base 140 and to the lower side of both side surfaces of the upper plate 161, respectively. Side plates 162 and 163, a suction plate 164 configured to be rotatable between the side plates 162 and 163, a bending motor 165 for rotating the suction plate 164, and a suction plate installed on the suction plate 164 and an intake manifold 166 forming a vacuum on the lower surface of 164.

Figure 9 shows a side view of the operation of the bending unit applied to the ultra-thin glass bending test apparatus having a break detection function according to the present invention.

Referring to the attached FIG. 9, the bending units (first bending unit 150 and second bending unit 160) adsorb the ultra-thin glass located on the lower side (FIG. 9(a)), and the ultra-thin glass In the adsorbed state, each of the suction plates 154 and 164 is rotated in a downward direction according to the driving of the bending motor configured in each bending unit (FIG. 9(b)), and the ultra-thin glass is bent by the rotation of these suction plates. will do the test.

10 is a side view schematically illustrating the operating state of FIG. 9 .

As shown in the accompanying FIG. 10, a vacuum is formed at the bottom of each suction plate 154, 164 by each intake manifold 156, 166, and the suction plate 154, 164 is vacuumed by the formed vacuum. The ultra-thin glass located at the lower side is adsorbed to the lower surfaces of the suction plates 154 and 164 (FIG. 10(a)).

When the suction plates 154 and 164 are rotated by the driving of the bending motor in a state where the ultra-thin glass (UTG) is adsorbed on the suction plate and their lower surfaces come close to each other, the ultra-thin glass (UTG) adsorbed on the suction plates 154 and 164 It is bent while having a predetermined curvature with respect to the axis (Fig. 10 (b)).

In the conventional bending test apparatus, a suction plate was placed under the ultra-thin glass to conduct a bending test. However, in this configuration, the multi-joint robot module must seat the ultra-thin glass on the suction plate in the process of seating the ultra-thin glass on the suction plate, and the bending unit moves up and down. It should include a configuration that can be lifted by .

However, in the present invention, the suction plates 154 and 164 are a method of adsorbing the ultra-thin glass located at the bottom, and according to the above configuration, the bending module only needs to move to the position where the ultra-thin glass is seated and adsorb it, and the bending There is an advantage in that the configuration of the module is simplified and the bending test is simplified because the lifting operation is omitted.

At this time, the bending is performed in a state in which the suction plates 154 and 164 are positioned above the garbage can module 200 .

11 is a perspective view of a GabbageCan module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

When the ultra-thin glass is broken during the bending operation of the bending units 150 and 160 of the bending module 100, the garbage can module 200 prevents the ultra-thin glass fragments from being scattered and broken fragments. It is to collect them.

11, the garbage can module 200 is installed corresponding to the installed number of bending modules 100, and when the bending modules 100 are installed in duplicate, the garbage can module (200) is also installed in doubles.

Each garbagecan module 200 will be described only for one identically configured configuration.

The garbage can module 200 includes a cover box 210 with an open top, a suction box 220 installed below the cover box 210, and a trash box installed below the suction box 220. 220 and a suction pipe 240 connected to the suction box 220 and applying a suction force generated by an aspirator (not shown in the drawing).

According to the above configuration, negative pressure is generated inside the suction box 220 and the cover box 210 according to the operation of the aspirator, and scattered fragments generated in the internal space are introduced into the aspirator.

That is, when the ultra-thin glass is broken during the bending test of the bending module 100, the fragments generated by the break of the ultra-thin glass are sucked through the suction device, and scattering into the air can be prevented. In addition, relatively large fragments that cannot be sucked into the aspirator fall and are accommodated in the trash box 230 .

In the above configuration, since the bending test by the bending module 100 is performed on the top of the garbage can module 200, the sound detection module 400 detecting the breakage of the ultra-thin glass in the bending test is the cover box ( 210) may be attached to the inner surface.

A description of the sound detection module 400 will be given later.

Next, the inspection module 300 will be described.

12 is a perspective view of an inspection module applied to an ultra-thin glass bending test apparatus having a crack detection function according to the present invention.

The inspection module 300 is for inspecting the ultra-thin glass subjected to the bending test, and performs a function of inspecting whether or not the ultra-thin glass has an abnormality after the bending test.

12, the inspection module 300 is installed inside an inspection rail 310 formed long in the left and right directions, an inspection box 320 sliding on the inspection rail 310, and the inspection box 320. It is configured to include an inspection unit 330 and a lighting unit 340 installed on the left and right sides of the inspection box 320, respectively.

According to the configuration described above, the inspection module 300 performs the inspection when the bending module 100 moves and is positioned above the inspection module 300 after the bending module 100 completes the bending test. The module 300 photographs the ultra-thin glass in a state adsorbed to the bending module 100 and inspects whether there is an abnormality.

If it is determined that there is no abnormality as a result of the inspection of the inspection module 300, the bending module 100 transfers the adsorbed ultra-thin glass to the unloading unit, and accepts it in the cassette by the articulated robot module, and determines that there is an abnormality as a result of the inspection. Then, the bending module 100 drops the adsorbed ultra-thin glass into the drop box 11 to be discarded.

Here, the inspection module 300 slides along the inspection rail 310 and inspects the ultra-thin glass adsorbed to the bending module 100 composed of doubles.

On the other hand, while the bending module 100 performs a bending test, there is a case where the ultra-thin glass is broken, and it is difficult to photograph the bending part with an imaging device due to the suction plates 154 and 164 adsorbing the ultra-thin glass. However, since fragments are dispersed during the breaking process, it is difficult to visually check them.

Accordingly, in the present invention, a sound detection module is configured to detect the breaking of the ultra-thin glass.

Referring to FIG. 11, the sound detection module 400 may be installed inside the cover box 210 of the garbage can module 200, but is installed near the bending module to detect sound when the ultra-thin glass is broken. It doesn't matter where the location is.

13 and 14 show a perspective view and a partially exploded perspective view of a sound detection module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention, respectively.

15 is a view showing the configuration of a sound detection module applied to an ultra-thin glass bending test apparatus having a break detection function according to the present invention.

13 to 15, the sound detection module 400 includes a base substrate 410 of a base part, a microphone 420 installed on the base substrate 410, an amplifier 430, a band pass filter ( 440), a sensing unit 450, a variable resistor 460, and a sound collecting cover 470 covering one side of the base substrate 410.

The microphone 420 detects sound (sound) generated by breaking the ultra-thin glass, and a signal for the detected sound, that is, a sound signal is amplified by the amplifier 430 .

At this time, the sound detected through the microphone 420 may include driving noise and external noise, such as a motor generated in the bending test unit.

Accordingly, the band pass filter 440 is configured to pass only the frequency domain of the acoustic signal generated when the ultra-thin glass is broken from the signal amplified by the amplifier 430.

The sensing unit 450 determines whether the sound signal amplified and output by the amplifier 440 is a sound signal generated by the breaking of the ultra-thin glass, and determines that the sound signal generated by the breaking of the ultra-thin glass as a result of the determination. , control to output a break signal.

The break signal output from the detection unit may be input as an operation signal of the Gabbagecan module. That is, the aspirator of the garbage can module 200 is operated according to the break signal, and the ultra-thin glass fragments scattered inside the suction box and the cover box are introduced into the aspirator according to the operation of the aspirator.

In other words, the aspirator may be configured to operate only on the breaking signal of the ultra-thin glass, so that the reliability of the sound detected by the sound detection module may be increased by noise caused by the suction operation of the aspirator.

The variable resistor 460 controls the amplification amount of the amplifier 440. For example, the amplitude of the frequency output from the amplifier 440 is adjusted according to the adjustment of the variable resistor so that the frequency is output at a frequency suitable for the use environment.

The sound collecting cover 470 has an open lower side and one lower front side, and is configured to receive sound through the opened side while preventing falling fragments of ultra-thin glass from entering the inside.

According to the present invention, since the breakage of the ultra-thin glass can be immediately confirmed by detecting the breakage of the ultra-thin glass during the bending test of the ultra-thin glass, there is an advantage in preventing safety accidents in advance.

In addition, as the ultra-thin glass is broken immediately, fragments are prevented from entering the subsequent process equipment, thereby minimizing the idle time of the process equipment due to the breakage of the ultra-thin glass, thereby maintaining optimal operation time.

In the above, a preferred embodiment of the ultra-thin glass bending test apparatus equipped with a crack detection function according to the present invention has been described, but the present invention is not limited thereto, and within the scope of the claims and the description of the invention, the accompanying drawings, various It is possible to practice variations in branches, and this also falls within the scope of the present invention.

100: bending module 110: rail
120: moving table 130: first bending base
140: second bending base 150: first bending unit
160: second bending unit 200: garbage can module
210: cover box 220: suction box
230: trash box 240: suction pipe
300: inspection module 400: sound detection module
410: base substrate 420: microphone
430: amplifier 440: band pass filter
450: sensing unit 460: variable resistance
470: sound collecting cover

Claims (5)

An ultra-thin glass bending test apparatus comprising a bending test unit for bending and testing the ultra-thin glass,
A sound detection module installed near the bending module of the bending test unit and detecting the breaking of the ultra-thin glass by detecting sound generated as the ultra-thin glass is broken,
The sound detection module,
a microphone that detects sound;
an amplifier for amplifying the sound signal output from the microphone;
a band pass filter for filtering the sound signal output from the amplifier;
a detection unit determining whether the ultra-thin glass is broken based on the sound signal output from the band pass filter and outputting a signal; and
a sound collecting cover for inducing the generated sound signal to the microphone;
Ultra-thin glass bending test apparatus having a break detection function, characterized in that it comprises a.
The method of claim 1,
The sound detection module,
Ultra-thin glass bending test apparatus having a break detection function, characterized in that activated in the process of performing the bending test in the bending module.
delete The method of claim 1,
The sound detection module,
a variable resistor for adjusting the amplification amount of the amplifier;
Ultra-thin glass bending test apparatus having a break detection function, characterized in that it further comprises.
The method of claim 1,
Ultra-thin glass having a break detection function, characterized in that, when the sound detection module detects sound generated by breaking the ultra-thin glass, the sound detection module outputs a break signal so that the garbage can module is operated. bending test equipment.

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