KR102407618B1 - Bending testing method of ultra thin glass - Google Patents

Abstract

The present invention relates to a bending test method of ultra-thin glass, and more particularly, by aligning the ultra-thin glass by vision and putting it into a bending test unit, and in a state in which the inserted ultra-thin glass is adsorbed, the bending curvature is changed to change the bending (bending) It relates to a bending test method of ultra-thin glass that tests the physical properties of the glass and stores the ultra-thin glass in a tray after vision alignment.

Description

BENDING TESTING METHOD OF ULTRA THIN GLASS

The present invention relates to a bending test method of ultra-thin glass, and more particularly, by aligning the ultra-thin glass by vision and putting it into a bending test unit, and in a state in which the inserted ultra-thin glass is adsorbed, the bending curvature is changed to change the bending (bending) It relates to a bending test method of ultra-thin glass that tests the physical properties of the glass and stores the ultra-thin glass in a tray after vision alignment.

In recent years, electrical and electronic technologies have rapidly developed, and various types of display products have been released to meet the needs of a new era and the needs of various consumers. Among them, research on flexible displays that can be folded and unfolded is active. Accordingly, for use in various applications requiring flexible and bendable glass (glass), the demand for flexible glass articles is increasing. For example, flexible display devices for mobile phones, tablets, and other portable electronic devices include flexible glass that must be bent or folded without breaking. However, traditionally glass has been considered to be rigid in nature, and therefore alternative materials for use in place of glass have been considered.

As an alternative to glass (glass), polymer films made of polymer have been considered and studied for use in flexible display devices. In the case of such a polymer film, the mechanical strength is weak, so it merely serves to prevent scratches on the display panel, but it is weak in impact resistance, has low transmittance, and is known to be relatively expensive.

On the other hand, it is known that if the glass is made of ultra-thin glass of 0.1 mm (100 μm) or less in order to be applied to a flexible display product, this is satisfied.

Ultra-thin glass is manufactured using dip, spray, or dip & spray methods and is manufactured through processing methods such as grinding, but there is a high risk of breakage or breakage due to cracks in the process of making thin. Various devices for testing the ultra-thin glass thus manufactured have been developed.

As a device for testing ultra-thin glass (UTG), a bending testing device for a flexible display is disclosed in Korean Patent Registration No. 10-1762141.

The technology is a motor capable of forward and reverse rotation, a support member for performing an operation to fold and unfold the specimen in a state of supporting one surface of the specimen, and spaced apart from the working space in which the specimen is folded, gripping one side of the support member and rotating the motor and a rotation member for rotating the support member according to the direction, when the electric motor rotates forward, the lower surface of the specimen attached to the support member is folded to face with respect to a vertical plane, and when the electric motor rotates in reverse , by folding the specimen so that the upper surface of the specimen faces with respect to the vertical plane after being stretched in the horizontal direction, the bending test in the forward and reverse direction can be repeatedly performed.

However, the above technique has a disadvantage in that it is not possible to adjust the bending radius of the bending, that is, the bending radius that is different for the folding.

In addition, Korean Patent Publication No. 10-1489667 discloses a bending test apparatus of a flexible display.

The technology includes a specimen mounting mechanism having a support means for flatly spreading and supporting a plate-shaped specimen and repeatedly performing a bending operation of the specimen using the rotational force transmitted to the support means, an electric motor for providing the rotational force to the support means, and , characterized in that it comprises a power transmission unit for transmitting the rotational force of the electric motor to the support means, and a bending radius adjusting unit installed adjacent to the specimen mounting mechanism to adjust the bending radius of the specimen.

The technique includes a bending radius adjusting unit installed adjacent to the specimen mounting mechanism to set the bending radius of the specimen or to reset the bending radius by changing the bending radius, wherein the bending radius adjusting unit comprises a fixture and a guide protrusion, and the The fixture penetrates the inside of the rotation case and is fixed to the shaft fixture, and the guide projection is detachably installed in the installation groove formed in the center of the fixture. Therefore, as the guide protrusion is inserted into the installation groove of the fixture and the fixture is fixed using the tightening bolt installed on the outside of the fixture, it is difficult to adjust the bending radius, and there is a problem that the bending radius cannot be precisely adjusted.

Registered Patent Publication No. 10-1762141 (2017. 07. 21.) Registered Patent Publication No. 10-1489667 (2015. 01. 29.)

The present invention has been devised to solve the above problems, and the problem to be solved in the present invention is to change the bending curvature of the ultra-thin glass while performing the input, bending test, inspection and discharge of the ultra-thin glass at once ( It is to provide a bending test method of ultra-thin glass that can test the physical properties against bending.

The bending test method of ultra-thin glass according to the present invention for solving the above problems is loaded in the first tray shuttle unit, and among the ultra-thin glass (UTG, Ultra Thin Glass) accommodated in the uppermost tray loaded in the first tray shuttle unit. An ultra-thin glass loading step of picking up one selected ultra-thin glass through the first UTG transfer unit and transferring it to the first non-alignment unit (S10); A first non-alignment step (S20) of aligning the position of the ultra-thin glass transferred by performing the ultra-thin glass loading step (S10) in the first non-alignment unit, and detecting position information on the aligned position; a bending loading step (S30) of placing the ultra-thin glass of the first non-alignment unit on the bending test unit through a first bending transfer unit based on the position information detected in the first non-alignment step (S20); A bending test step of adsorbing the ultra-thin glass seated in the bending test part through the bending loading step (S30) in the bending test part, and performing a bending test of the ultra-thin glass through a folding operation in the adsorbed state (S40); A bending unloading step (S50) of picking up the ultra-thin glass on which the bending test is completed in the bending test step (S30) from the bending test section through the second bending transfer section and transferring it to the second non-alignment section; With respect to the ultra-thin glass transferred to the second non-alignment unit through the ultra-thin glass unloading step (S40), a second non-alignment step of aligning a position in the second non-aligning unit and detecting position information about the aligned position (S60); And on the basis of the position information detected in the second non-alignment step (S60), the ultra-thin glass unloading step of picking up the ultra-thin glass of the second non-alignment unit through the second UTG transfer unit and loading it on the third tray shuttle unit (S70) ) is included.

Here, the bending test unit includes a first bending module and a second bending module on which the ultra-thin glass is seated; a gap adjusting module for adjusting a gap between the first bending module and the second bending module; a first rotation module for rotating the first bending plate of the first bending module; and a second rotation module for rotating the second bending plate of the second bending module.

In addition, the gap adjusting module is characterized in that the distance between the first bending plate and the second bending plate is adjusted within the range of 1 ~ 10mm.

In addition, as a result of the ultra-thin glass loading step (S10), when it is determined that there is no ultra-thin glass accommodated in the uppermost tray loaded in the first tray shuttle unit, the tray located at the uppermost end of the first tray shuttle unit is transferred to the first tray transfer unit It includes a tray 1-2 transfer step 80 for transferring to the second tray shuttle unit through the .

In addition, as a result of the ultra-thin glass unloading step (S70), if it is determined that there is no ultra-thin glass that can be accommodated in the uppermost tray loaded on the third tray shuttle unit, the second tray shuttle unit through the second tray transfer unit and a tray 2-3 transfer step (S90) of transferring the tray to the third tray shuttle unit.

According to the present invention, since the input, bending test, inspection, and discharge of ultra-thin glass can be performed uniformly and the bending curvature of the bending test can be varied and tested, bending that matches the bending curvature of an electronic device to which a flexible display is applied There are advantages to being tested.

1 is a perspective view of a bending test apparatus for performing a bending test method of ultra-thin glass according to the present invention;
2 is a flowchart for a bending test method of ultra-thin glass according to the present invention;
3 and 4 are a perspective view and an exploded perspective view of the tray shuttle part of the bending test apparatus applied to the bending test method of ultra-thin glass according to the present invention, respectively;
5 and 6 are a perspective view and a front view of the UTG transfer unit of the bending test apparatus applied to the bending test method of ultra-thin glass according to the present invention, respectively;
7 is a perspective view of the non-alignment part applied to the bending test method of ultra-thin glass according to the present invention;
8 is an exploded perspective view of the alignment table module applied to the bending test method of ultra-thin glass according to the present invention;
9 is a perspective view of a bending transfer unit applied to the bending test method of ultra-thin glass according to the present invention;
10 to 13 are respectively a perspective view, a schematic exploded perspective view, an exploded perspective view, AA' cross-sectional view of a bending test part applied to the bending test method of ultra-thin glass according to the present invention;
14 is a view showing a bending test process of ultra-thin glass in the bending test unit applied to the bending test method of ultra-thin glass according to the present invention;
15 is a perspective view of a tray transfer unit applied to the bending test method of ultra-thin glass according to the present invention;
16 is a perspective view of the tray lifting unit applied to the bending test method of ultra-thin glass according to the present invention.

Next, a preferred embodiment of the bending test method of ultra-thin glass 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 having the same function, and repeated detailed descriptions are omitted to avoid overlapping descriptions.

In addition, the examples described below are illustratively shown in order to effectively show the preferred embodiments of the present invention, and should not be construed to limit the scope of the present invention.

The present invention aligns the ultra-thin glass by vision and puts it into the bending test section, and tests the physical properties for bending by varying the bending curvature in a state in which the inserted ultra-thin glass is adsorbed, and the ultra-thin glass that has been tested It relates to a bending test method of ultra-thin glass stored in a tray after vision alignment.

1 is a perspective view of a bending test apparatus for performing a bending test method of ultra-thin glass according to the present invention.

1, the bending test apparatus 1 for performing the bending test method of ultra-thin glass according to the present invention includes a tray shuttle unit 100, a UTG transfer unit 200, a non-alignment unit 300, and bending It is configured to include a transfer unit 400 , a bending test unit 500 , a tray transfer unit 600 , and a tray elevating unit 700 .

The tray shuttle unit 100 performs a function of allowing the tray 10 to be loaded and slid into the device so that the loaded tray is inserted or the loaded tray is discharged, and the first tray shuttle unit 101, the first It includes a second tray shuttle unit 102 and a third tray shuttle unit 103 .

The ultra-thin glass is accommodated in the first tray shuttle unit 101, and the stacked tray is put, and it slides according to the set logic and is guided to the inside of the bending test apparatus 1 .

An empty tray transferred from the first tray shuttle unit 101 is temporarily stacked on the second tray 102 , and a tray for accommodating the ultra-thin glass discharged after the test is completed is stacked on the third tray shuttle unit 103 . .

The UTG transfer unit 200 picks up the ultra-thin glass from the first tray shuttle unit 101 of the tray shuttle unit 100 and loads the first UTG transfer unit 201 and the non-alignment unit 300 to the non-alignment unit 300 . and a second UTG transfer unit 202 that picks up the ultra-thin glass of the tray shuttle unit 100 and unloads it to the third tray shuttle unit 103 of the tray shuttle unit 100 .

The non-alignment unit 300 aligns the position of the transferred ultra-thin glass, and detects the aligned position. That is, the non-alignment unit 300 is for inducing the ultra-thin glass input to the subsequent device to be put in a properly aligned state, and includes a first non-alignment unit 201 and a second non-alignment unit 202 . .

The first non-alignment unit 301 aligns the ultra-thin glass transferred from the first UTG transfer unit 201 of the UTG transfer unit 200 and detects the aligned position.

The second non-alignment unit 302 aligns the ultra-thin glass on which the bending test is completed from the second bending transfer unit 402, and detects the aligned position.

The bending transfer unit 400 is a first bending transfer unit 401 for seating the ultra-thin glass of the first non-alignment unit on the bending test unit 500 based on the position of the ultra-thin glass detected by the first non-alignment unit 201 . and a second bending transfer unit 402 for transferring the ultra-thin glass whose bending test has been completed in the bending test unit 500 to the second non-alignment unit 302 .

The bending test unit 500 performs a bending test on the ultra-thin glass transferred by the first bending transfer unit 501 of the bending transfer unit 400 .

The tray transfer unit 600 transfers trays, and the first tray transfer unit 601 and the second tray transfer unit 601 transfer the tray of the first tray shuttle unit 101 of the tray shuttle unit 100 to the second tray shuttle unit 102 . It is configured to include a second tray transfer unit 602 for transferring the tray of the second tray shuttle unit 102 to the third tray shuttle unit.

The tray lifting unit 700 serves to raise and lower the tray according to the height of the tray transferred from the tray transfer unit 600 , and corresponds to the first tray shuttle unit 101 of the tray shuttle unit 100 . The first tray lifting unit 701 configured to correspond to the second tray shuttle unit 102 , the second tray lifting unit 702 configured to correspond to the second tray shuttle unit 102 , and the third tray lifting unit configured to correspond to the third tray shuttle unit 103 . part 703 .

Figure 2 shows a flow chart for the bending test method of the ultra-thin glass according to the present invention.

2, the bending test method of ultra-thin glass according to the present invention includes an ultra-thin glass loading step (S10), a first non-alignment step (S20), a bending loading step (S30), a bending test step (S40), It is made including a bending unloading step (S50), a second non-alignment step (S60) and an ultra-thin glass unloading step (S70).

1. Ultra-thin glass loading step (S10)

In the ultra-thin glass loading step (S10), one ultra-thin glass selected from among ultra-thin glass (UTG, Ultra Thin Glass) loaded on the first tray shuttle unit 101 and accommodated in the uppermost tray loaded on the first tray shuttle unit 101 . is picked up through the first UTG transfer unit 201 and transferred to the first non-alignment unit 301 .

That is, in the ultra-thin glass loading step (S10), according to the setting logic operation of the first UTG transfer unit 201, the ultra-thin glass accommodated in the uppermost tray loaded on the first tray shuttle unit 101 is picked up (adsorbed) and non-aligned. It is a step of transferring to the first non-alignment unit 301 of the unit 300 .

2. First vision alignment step (S20)

The first non-alignment step (S20) is a step of aligning the position of the ultra-thin glass transferred by the execution of the ultra-thin glass loading step (S10) in the first non-alignment unit 301, and detecting the aligned position.

The position of the ultra-thin glass accommodated in the tray may be changed in the process of being moved while being accommodated in the tray or in the process of being picked up and transported through the first UTG transfer unit 201 . At this time, when the position (arrangement) of the ultra-thin glass is changed and the bending test is performed by being transferred to the bending test unit 500, the area to be bent is changed, and thus an accurate test for physical bending is performed. Impossible problems arise.

Accordingly, in the present invention, the ultra-thin glass is aligned using a vision, position information for an error deviating from the reference position is detected according to alignment, and a subsequent operation is performed based on the detected position information.

3. Bending loading step (S30)

In the bending loading step (S30), based on the position information detected in the first non-alignment step (S20), the ultra-thin glass of the first non-alignment unit 301 is subjected to a bending test unit ( 500) is a step to settle.

4. Bending test step (S40)

In the bending test step (S40), the ultra-thin glass seated in the bending test section is adsorbed in the bending test section through the bending loading step (S30), and the bending test of the ultra-thin glass is performed through a folding operation in the adsorbed state. to be.

In this case, the curvature of the bending test may be variably performed within a diameter range of 1 to 10 mm (a radius of 0.5 to 5 mm). That is, the bending curvature to be performed is stored according to the preset value, and the bending test is performed according to the stored setting value.

5. Bending unloading step (S50)

In the bending unloading step (S50), the ultra-thin glass on which the bending test has been completed in the bending test step (S40) is picked up from the bending test unit 500 through the second bending transfer unit 402, and the second non-alignment unit 302 It is a step to transfer to

6. Second vision alignment step (S60)

The second non-alignment step (S60) aligns the position in the second non-alignment unit 302 with respect to the ultra-thin glass transferred to the second non-alignment unit through the bending unloading step (S50), and for the aligned position It is a step of detecting location information.

The ultra-thin glass subjected to the bending test is adsorbed and transported in a bent state by the folding operation. For this reason, the position of the ultra-thin glass may be changed.

At this time, when the ultra-thin glass is accommodated in the tray in a state where the position (arrangement) is changed, the ultra-thin glass may not be accurately accommodated in the receiving groove of the tray, and some may be exposed to the outside.

Accordingly, in the present invention, in the second non-alignment step (S60) as in the first non-alignment step (S20), the ultra-thin glass is aligned using a vision, and the position for an error deviating from the reference position according to the alignment Information is detected, and a subsequent operation is performed based on the detected location information.

7. Ultra-thin glass unloading step (S70)

In the ultra-thin glass unloading step (S70), the ultra-thin glass of the second non-alignment unit 302 is picked up through the second UTG transfer unit 202 based on the position information detected in the second non-alignment step S60, and the second 3 This is a step of loading the tray shuttle unit 103 .

In the above configuration, the first ultra-thin glass of the tray accommodated in the first tray shuttle unit 101 is the UTG transfer unit 200 , the non-alignment unit 300 , the bending transfer unit 400 , the bending test unit 500 , Via the tray transfer unit 600 and the tray elevating unit 700 , it is accommodated in the tray of the third tray shuttle unit 103 , the first ultra-thin organic non-alignment unit 300 to the bending test unit 500 . ), the second ultra-thin glass is put in.

That is, as the input and discharge of the ultra-thin glass are continuously made, a bending test of the ultra-thin glass is performed.

Meanwhile, in the present invention, three tray shuttle units 101 , 102 , 103 are configured.

The first tray shuttle unit 101 accommodates the ultra-thin glass to be tested. Although the tray 10 shown in FIG. 1 is shown to accommodate eight ultra-thin glass, this may vary according to the specifications of the ultra-thin glass of the test subject.

In a preferred configuration, assuming that there is only one ultra-thin glass accommodated in the tray, during the bending test of the ultra-thin glass accommodated in the tray, the tray in which the ultra-thin glass was accommodated is transferred to the third tray shuttle unit 103, What is necessary is to accommodate it in the third tray shuttle unit 103 picked up and transferred through the second UTG transfer unit 202 .

However, if there are three or more ultra-thin glass accommodated in the tray, the initially loaded ultra-thin glass is discharged before all of the ultra-thin glass accommodated in the tray is subjected to a bending test. For example, as shown in FIG. 1, when a total of 8 ultra-thin glass is accommodated in the tray, and sequentially loaded from the first ultra-thin glass to complete the bending test and discharged, the first tray shuttle unit 101 At least 3 to 5 pieces of ultra-thin glass are left in the tray. Therefore, another tray will be required to complete the bending test and accommodate the ultra-thin glass as it exits.

Accordingly, in the present invention, the second tray shuttle unit 102 is configured between the first tray shuttle unit 101 and the third tray shuttle unit 103 .

In the second tray shuttle unit 102 , an empty tray is temporarily loaded during a bending test of ultra-thin glass, or an empty tray is placed in the third tray shuttle unit according to the state of the tray of the third tray shuttle unit 103 . It includes a tray 1-2 transfer step (S70) and a tray 2-3 transfer step (S80) to provide in step 103 .

7. Tray 1-2 transfer step (S80)

In the tray 1-2 transfer step (S80), as a result of the ultra-thin glass loading step (S10), if it is determined that there is no ultra-thin glass accommodated in the uppermost tray loaded in the first tray shuttle unit, the uppermost end of the first tray shuttle unit It is a step of transferring the tray located in the first tray transfer unit to the second tray shuttle unit.

That is, the tray 1-2 transfer step ( S80 ) is a step of transferring the empty tray of the first tray shuttle unit 101 to the second tray shuttle unit 102 .

8. Tray 2-3 transfer step (S90)

In the tray 2-3 transfer step (S90), as a result of the ultra-thin glass unloading step (S70), if it is determined that there is no ultra-thin glass that can be accommodated in the uppermost tray loaded on the third tray shuttle unit 103, the second In this step, the tray of the second tray shuttle unit 102 is transferred to the third tray shuttle unit 103 through the tray transfer unit 202 .

According to such a configuration, the input, bending test, inspection, and discharge of the ultra-thin glass can be continuously performed, so there is an advantage in that the efficiency of the bending test of the ultra-thin glass is increased.

Next, the bending test apparatus 1 is demonstrated.

3 and 4 are a perspective view and an exploded perspective view of a tray shuttle part of the bending test apparatus applied to the bending test method of ultra-thin glass according to the present invention, respectively.

3 and 4, the tray shuttle unit 100 includes a shuttle rail 110, a slider 120 installed so as to be slid on the shuttle rail 110, and the slider 120 using the shuttle rail. The shuttle motor 130 moved by 110, coupled to the upper part of the slider 120, slides according to the movement of the slider 120, and the tray loading plate 140 on which the tray 10 is loaded and the tray on which the tray 10 is loaded Includes a tray guider 150 for guiding both sides of (10).

Accordingly, in the trays loaded on the tray loading plate 140 , the slider 120 slides along the shuttle rail 110 according to the driving of the shuttle motor 130 , and the tray is loaded by the sliding driving of the slider 120 . The trays loaded on the plate 140 are positioned on the lower side of the UTG transfer unit 200 .

5 and 6 show a perspective view and a front view of the UTG transfer unit of the bending test apparatus applied to the bending test method of ultra-thin glass according to the present invention, respectively.

5 and 6 attached, the UTG transfer unit 200 is operated in front, rear, left, right and up and down axes to adsorb the ultra-thin glass in the tray, and transfer the adsorbed ultra-thin glass to the non-alignment unit 300 . As to do, the X-axis rail 210, the first X-axis rail 211 and the second X-axis rail including the first X-axis rail 211 and the second X-axis rail 212 and 212) a Y-axis rail 220 that slides along, a Y-axis slider 230 that slides along the Y-axis rail 220, and a Z-axis elevating module 240 coupled to the Y-axis slider 230. and a UTG adsorption module 250 coupled to the lower tip of the Z-axis elevating module 240 and adsorbing ultra-thin glass according to vacuum adsorption. Here, reference numerals for motors installed on each rail and performing a slide movement are omitted.

According to the above configuration, the UTG transfer unit 200 adsorbs the UTG through the operation of the Y-axis rail 220 , the Y-axis slider 230 , and the Z-axis elevating module 240 , which slide along the X-axis rail 210 . The module 250 is moved to the top of the selected ultra-thin glass, and in a state located on the top of the ultra-thin glass, it is lowered by the operation of the Z-axis elevating module 250 to adsorb the ultra-thin glass by the adsorption operation of the UTG adsorption module 250. . In the state in which the UTG adsorption module 250 adsorbs the ultra-thin glass, the Y-axis rail 220, the Y-axis slider 230 and the Z-axis elevating module 240 move to the non-alignment unit 300 by the operation, and set The movement is completed by releasing the adsorption of the ultra-thin glass at the position.

The non-alignment unit 300 aligns the ultra-thin glass transferred by the UTG transfer unit 200 and performs a function of detecting position information at the aligned position.

7 is a perspective view of the non-alignment unit applied to the bending test method of ultra-thin glass according to the present invention.

Referring to the accompanying FIG. 7 , the vision alignment unit 300 includes an alignment table module 310 and a vision module 320 .

8 is an exploded perspective view of the alignment table module applied to the bending test method of ultra-thin glass according to the present invention.

The alignment table module 310 moves the ultra-thin glass transferred from the UTG transfer unit 200 in a straight line while seated and adsorbed. Referring to FIG. 8 , the alignment table module 310 proceeds in the X-axis direction. a vision rail 311 that becomes a fixed vision rail 311, a vision slider 312 that moves along the vision rail 311, a vision rotation unit 313 installed on the vision slider 312, and an upper portion of the vision rotation unit 313. A rotating plate 314 that is installed and rotated according to the operation of the non-rotating unit 313, an adsorption guide plate 315 installed on the rotating plate 314, and an upper portion of the adsorption guide plate 315, the It includes a non-adsorption plate 316 for adsorbing the seated ultra-thin glass (UTG) according to the suction power of the absorption guide plate 315 .

7, the vision module 320 includes a vision vertical frame 321 installed on both sides of the vision rail 311 of the alignment table module 310, respectively, and an upper portion of the vision vertical frame 321. A vision camera installed on both sides of a horizontal vision frame 322 installed by connecting both ends, a horizontal horizontal rail 323 installed parallel to the horizontal vision frame 322, and a sliding side of the horizontal horizontal rail 323, respectively. Slider unit (324, 325), each of the vision camera slider unit (324, 325) installed on the edge of the ultra-thin glass (UTG) moved by the vision absorption plate 316 (side, plane edge) are photographed, respectively vision cameras 326 and 327, installed below each of the vision cameras 326 and 327 to guide the alignment position standards for the corners (sides) of the ultra-thin glass (UTG), vision alignment guiders 328 and 329 ) is included.

The alignment process of ultra-thin glass will be described through the above configuration.

The ultra-thin glass UTG transferred by the UTG transfer unit 200 is moved along the vision rail 311 while being adsorbed on the vision suction plate 316 of the alignment table module 310 .

The edge (side) of the ultra-thin glass UTG moving along the vision rail 311 is photographed by the vision cameras 326 and 327 .

At this time, the captured video image includes the corners (sides) of the vision alignment guides 328 and 329, and the non-alignment unit 300 includes the corners (sides) of the vision alignment guides 328 and 329 and ultra-thin glass (UTG). ) detects the parallel state of the edge (side). As a result of the detection, if it is determined that they are not parallel, the non-rotation unit 313 is driven so that the corners (sides) of the non-alignment guides 328 and 329 and the corners (sides) of the ultra-thin glass UTG are parallel. According to the driving of the vision rotation unit 313, the non-alignment unit 300 detects that the corners (sides) of the non-alignment guides 328 and 329 and the corners (sides) of the ultra-thin glass (UTG) are parallel. Position information is generated by detecting the position of the ultra-thin glass (UTG) based on the corners (sides) of the vision alignment guides (328, 329).

If necessary, the location information of the vision alignment unit 300 may also include center point information for location information at each vertex of the ultra-thin glass.

The bending transfer unit 400 places the ultra-thin glass of the non-alignment unit 300 on the bending test unit based on the position information detected by the non-alignment unit 300 .

9 is a perspective view of the bending transfer unit applied to the bending test method of ultra-thin glass according to the present invention.

9, the bending transfer unit 400 is a bending transfer rail 410 formed long in the Y-axis direction, a bending transfer slider 420 installed to slide on the bending transfer rail 410, the bending It includes a bending transfer elevating module 430 installed on the transfer slider 420 and elevating in the vertical (Z-axis) direction, and a bending transfer adsorption module 440 in which the bending transfer elevating module 430 is installed on the lower side.

According to the above configuration, by driving the bending transfer slider 420, the bending transfer adsorption module 440 is positioned on the upper side of the ultra-thin glass seated on the vision adsorption plate 316 of the non-alignment unit 300. , as the bending transfer and elevating module 430 descends, the suction plate of the bending transfer adsorption module 440 adsorbs the ultra-thin glass and rises, and the bending transfer adsorption module 440 adsorbs the ultra-thin glass. The ultra-thin glass is transferred to the upper portion of the bending test unit 500 by the operation of 420 . At this time, the position moved to the upper part of the bending test unit 500 is adjusted based on the position information detected by the non-alignment unit 300 .

That is, based on the center line passing through the center point of the ultra-thin glass by the position information detected by the non-alignment unit 300, the bending transfer unit 400 is seated so as to coincide with the center line of the bending test unit 500 .

The bending test unit 500 performs a function of performing a bending test of the ultra-thin glass transferred through the bending transfer unit 400 .

10 to 13 are respectively a perspective view, a schematic exploded perspective view, an exploded perspective view, and a cross-sectional view A-A' of a bending test part applied to the bending test method of ultra-thin glass according to the present invention.

10 to 13 , the bending test unit 500 includes a first bending module 510 , a second bending module 520 , an interval adjusting module 530 , a first rotation module 540 and It includes a second rotation module (550).

The first bending module 510 is rotated in a state in which a part of the ultra-thin glass is seated and the seated ultra-thin glass is adsorbed, and the second bending module 520 is configured in the same way as the first bending module 510 . However, as being in a point symmetrical relationship, a part of the ultra-thin glass is seated and rotated in a state in which the seated ultra-thin glass is adsorbed.

The interval adjusting module 530 adjusts the interval between the first bending module 510 and the second bending module 520 , and the interval between the first bending module 510 and the second bending module 520 . will determine the bending curvature of the bending test.

Referring to the attached FIG. 11 , the gap adjusting module 530 includes a gap adjusting motor 531 , a ball screw 532 connected to the rotation shaft of the gap adjusting motor 531 , and a screw of the ball screw 532 . It is coupled to the connected ball screw nut, and includes a first moving table 533 and a second moving table 534 that are guided by guides on both sides to move linearly.

At this time, the ball screw 532 is formed in the opposite direction of the left and right screws with respect to the center, and the first moving table 533 and the second moving table 534 are respectively connected to the screws in opposite directions. That is, the distance between the first moving table 533 and the second moving table 534 is changed according to the rotation direction of the ball screw 532 . For example, the first moving table 533 and the second moving table 534 come close to each other due to the forward rotation of the ball screw 532 , and the first moving table 533 and the second moving table 534 come close to each other by the reverse rotation of the ball screw 532 . The moving table 533 and the second moving table 534 are spaced apart from each other.

The first moving table 533 is coupled to the first bending module 510 , and the second moving table 534 is coupled to the second bending module 520 .

Accordingly, the gap between the first bending module 510 and the second bending module 520 is adjusted by the configuration of the gap adjusting motor 531 of the gap adjusting module 530 . In this case, the distance between the first bending module 510 and the second bending module 520 may be adjusted within a range of 1 to 10 mm. In more detail, the distance between the first bending plate of the first bending module 510 and the second bending plate of the second bending module 520 is adjusted within a range of 1 to 10 mm.

The first bending module 510 coupled to the first moving table 533 and the second bending module 520 coupled to the second moving table 534 have the same point symmetry to prevent interference due to overlapping. , and the configuration of the second bending module 520 is replaced with the description of the first bending module 510 .

12, the first bending module 510 includes a base plate 511, a first bracket 512 and a second bracket 513 installed on both sides of the base plate 511, respectively, and the The first bending plate 514 rotatably installed between the first bracket 512 and the second bracket 523 and the suction force applied from the suction device coupled to the lower surface of the first bending plate 514 are the and a first adsorption plate 515 applied to a through hole (reference numeral not shown) formed in the upper surface of the first bending plate 514 .

Here, the first bending plate 514 is formed with a center line CL for setting a reference point for the position of the ultra-thin glass to be seated.

In addition, a first rotation module 540 for rotating the first bending plate 514 is installed on the first bracket 512 .

The first rotation module 540 is connected to the rotation shaft of the first rotation motor 541 and the first rotation motor 541 to convert the rotation ratio and fold the first bending plate 514 according to the converted gear ratio. A gearbox 542 for rotating to unfold, a limit unit connected to a shaft for rotating the first bending plate 514 of the gearbox 542 to limit the 90° rotation of the first bending plate 514 ( 543).

Similar to the configuration of the first bending module 520 and the first rotation module 540 , the second bending module 520 and the second rotation module 550 are configured.

Here, a center line CL is also formed on the second bending plate of the second bending module 520 corresponding to the first bending plate 514 of the first bending module 510, and the first bending plate 514 ) based on the center line CL of the second bending plate and the center line CL of the second bending plate, the bending transfer unit 400 seats the transferred ultra-thin glass. That is, by comparing the position information detected by the vision alignment unit 300 with the position information of the center lines CL as a reference, and calculating the difference value according to the comparison, the bending transfer unit 400 is transported It is seated on the first bending plate 514 of the first bending module 510 and the second bending plate of the second bending module 520 so that the center point of the ultra-thin glass and the center line CL coincide.

In addition, a bending test of ultra-thin glass is performed through folding and unfolding in which the first bending plate 514 of the first bending module 520 and the second bending plate of the second bending module 520 face each other.

14 is a view showing a bending test process of ultra-thin glass in the bending test unit applied to the bending test method of ultra-thin glass according to the present invention.

14 (a) of FIG. 14 is a state in which the ultra-thin glass UTG is seated on the first bending plate 514 and the second bending plate 524 . When the ultra-thin glass (UTG) is seated on the first bending plate (514) and the second bending plate (524), the ultra-thin glass (UTG) seated on the first bending plate ( 514) and the second bending plate 524 are in close contact with the adsorption.

At this time, the gap G between the first bending plate 514 and the second bending plate 524 is adjusted to a preset range within the range of 1 to 10 mm by the spacing adjusting module 530 .

Referring to the attached FIG. 14 (b), in a state in which the ultra-thin glass (UTG) is adsorbed to the first bending plate 514 and the second bending plate 524, the first rotation module 540 and the second By driving the rotation module, the first bending plate 514 and the second bending plate 524 are rotated to face each other, and the ultra-thin glass UTG adsorbed thereon is bent.

Here, a rotation axis (RA) on which the first bending plate 514 is rotated is, as shown in FIG. 14B , the upper surface of the first bending plate 514 and the second bending plate 524 . ) and the edge where the facing faces meet is rotated around the axis.

In addition, as shown in FIG. 12 , a rotation axis (RA) on which the second bending plate 524 is rotated faces the upper surface of the second bending plate 524 and the first bending plate 514 . The edges where the faces meet are rotated around the axis.

That is, since the axis of rotation is rotated based on the upper edge of the surfaces of the first bending plate 514 and the second bending plate 524 facing each other, the first bending plate 514 and the second bending plate 524 are rotated. ) when the gap (G) is 1 mm, the bending curvature (radius) is tested as 0.5 mm, and when the gap (G) between the first bending plate 514 and the second bending plate 524 is 10 mm, bending The curvature (radius) is tested with 5 mm.

That is, the bending curvature test is made in the range of 0.5 ~ 5mm.

The ultra-thin glass that has been tested in the bending test unit 500 is transferred to the second non-alignment unit 302 by the second bending transfer unit 402 of the bending transfer unit 400 . Thereafter, for the ultra-thin glass transferred to the second non-alignment unit 302, the second non-alignment unit 302 aligns the position and detects the position information for the aligned position, It is accommodated in the tray 10 through the second UTG transfer unit 202 .

At this time, the second UTG transfer unit 202 places the ultra-thin glass on the tray 10 based on the position information detected by the second non-alignment unit 302 .

In summary, the ultra-thin glass according to the bending test process is a first tray shuttle unit 101, a first UTG transfer unit 201, a first non-alignment unit 301, a first bending transfer unit 401, a bending test unit ( 500), the second bending transfer unit 402, the second non-alignment unit 302, the second UTG transfer unit 202, and the third tray shuttle unit 103 sequentially.

Meanwhile, in the bending test apparatus applied to the present invention, the empty tray of the first tray shuttle unit 101 is transferred to the second tray shuttle unit 102 and the empty tray of the second tray shuttle unit 102 is transferred to the third tray shuttle. A tray transfer unit 600 for transferring to the unit 103 is configured.

15 is a perspective view of the tray transfer unit applied to the bending test method of ultra-thin glass according to the present invention.

Here, the tray transfer unit 600 includes the first tray transfer unit 601 and the second tray shuttle unit 102 for transferring the empty tray of the first tray shuttle unit 101 to the second tray shuttle unit 102 . It is configured to include a second tray transfer unit 602 for transferring the empty tray of the third tray shuttle unit 103, and the first tray transfer unit 601 and the second tray transfer unit 602 have the same configuration.

15, the tray transfer unit 600 is a tray transfer rail 610 disposed on the upper portion of the tray shuttle, a tray transfer slider 620 installed so as to be slidable on the tray transfer rail 610, the It includes a tray transfer arm 630 installed on the tray transfer slider 620, and a tray transfer chuck 640 installed on the tray transfer arm 630 to adsorb and hold the tray according to adsorption.

The tray transfer unit 600 having the above configuration transfers the tray located at the uppermost end of the tray shuttle unit to the neighboring tray shuttle unit.

Looking at the configuration of the tray transfer unit 600, the configuration in which the tray is lifted up and down is excluded. That is, the tray transfer unit 600 transfers the tray of the selected tray shuttle unit to the neighboring tray shuttle unit through horizontal movement. At this time, in the tray shuttle unit in which the tray is transferred and one layer is lost, the height of the stacked trays is lowered corresponding to the thickness of the transferred trays, and in the tray shuttle unit in which the trays are transported and stacked, the trays are stacked corresponding to the thickness of the trays. The tray height is increased. Accordingly, the tray lifting unit 700 for adjusting the height corresponding to the height (or number) of the stacked trays is configured.

16 is a perspective view of the tray lifting unit applied to the bending test method of ultra-thin glass according to the present invention.

The tray elevating unit 700 includes a first tray elevating unit 701 and a second tray corresponding to the first tray shuttle unit 101 , the second tray shuttle unit 102 , and the third tray shuttle unit 103 , respectively. Consists of a lifting unit 702 and a third tray lifting unit 703 .

Referring to the accompanying FIG. 16 , the tray lifting unit 700 includes a tray fixing module 710 and a tray lifting module 720 .

The tray fixing module 710 performs a function to hold both sides of the uppermost tray 10 in close contact among the stacked trays. ) and a first close contact unit 711 and a second close contact unit 712 for adhering the left and right sides, respectively.

The tray elevating module 720 elevates the tray stacked on the tray shuttle unit 100, and adjusts the height of the lamination tray according to a set logic. The vertically installed tray elevating rail 721, the tray elevating rail It includes a tray lifting slider 722 installed in 721 and installed to be vertically movable, and a tray lifting fork 723 installed on both sides of the tray lifting slider 722 to support the tray 10, respectively.

According to the configuration of the tray lifting unit 700, the uppermost tray 10 loaded according to the lifting operation of the lifting module 720 according to the setting logic is the first adhesion unit 711 of the tray fixing module 710. When positioned between and the second adhesion unit 712, the first adhesion unit 711 and the second adhesion unit 712 is fixed by adhering the tray from the left and right sides.

In a state in which the tray 10 is fixed by the tray fixing module 710 , the tray is transferred to the neighboring tray shuttle unit by driving the tray transfer unit 600 .

According to the above configuration, the configuration of the control logic is simplified as the tray transfer unit 600 for horizontally moving the tray and the tray lifting unit 700 for vertically moving the tray are individually configured. That is, the tray transfer unit 600 only needs to perform a simple operation of horizontally transferring the tray to the neighboring tray shuttle unit by determining whether there is an empty tray, and the tray lifting unit 700 adjusts the tray to the height of the uppermost tray. By being configured to perform only a simple operation of raising or lowering, there is an advantage in that the logic configuration is simplified and errors in logic execution can be minimized.

As described above, according to the present invention, since the input, bending test, inspection, and discharge of ultra-thin glass can be uniformly performed, and the bending curvature of the bending test can be varied and tested, it conforms to the bending curvature of an electronic device to which the flexible display is applied. It has the advantage of being able to conduct a bending test.

In the above, a preferred embodiment of the bending test method for ultra-thin glass according to the present invention has been described, but the present invention is not limited thereto, and various modifications are made within the scope of the claims and the description of the invention and the accompanying drawings. It is possible, and this is also within the scope of the present invention.

1: bending test device 10: tray
100: tray shuttle unit 101: first tray shuttle unit
102: second tray shuttle unit 103: third tray shuttle unit
200: UTG transfer unit 201: first UTG transfer unit
202: second UTG transfer unit 300: vision alignment unit
301: first non-alignment unit 302: second non-alignment unit
400: bending transfer unit 401: first bending transfer unit
402: second bending transfer unit 500: bending test unit
600: tray transfer unit 601: first tray transfer unit
602: second tray transfer unit 700: tray lifting unit
701: first tray lifting unit 702: second tray lifting unit
703: third tray lifting unit

Claims (5)

One ultra-thin glass selected from among ultra-thin glass (UTG) loaded on the first tray shuttle and accommodated in the uppermost tray loaded on the first tray shuttle is picked up through the first UTG transfer unit and first non-aligned Ultra-thin glass loading step (S10) to transfer to the sub;
A first non-alignment step (S20) of aligning the position of the ultra-thin glass transferred by the execution of the ultra-thin glass loading step (S10) in the first non-alignment unit, and detecting position information on the aligned position;
a bending loading step (S30) of placing the ultra-thin glass of the first non-alignment unit on the bending test unit through a first bending transfer unit based on the position information detected in the first non-alignment step (S20);
A bending test step of adsorbing the ultra-thin glass seated in the bending test part through the bending loading step (S30) in the bending test part, and performing a bending test of the ultra-thin glass through a folding operation in the adsorbed state (S40);
A bending unloading step (S50) of picking up the ultra-thin glass on which the bending test has been completed in the bending test step (S40) from the bending test section through a second bending transfer section and transferring it to a second non-alignment section;
For the ultra-thin glass transferred to the second non-alignment unit through the bending unloading step (S50), a second non-alignment step ( S60); and
On the basis of the position information detected in the second non-alignment step (S60), the ultra-thin glass unloading step of picking up the ultra-thin glass of the second non-alignment unit through the second UTG transfer unit and loading it on the third tray shuttle unit (S70) ;
is made, including
The first non-alignment unit and the second non-alignment unit,
It consists of an alignment table module and a vision module,
The sorting table module,
Vision rail running in the X-axis direction;
a vision slider moving along the vision rail;
a vision rotation unit installed on the vision slider;
a rotating plate installed on the non-rotating unit and rotating according to the operation of the non-rotating unit;
an adsorption guide plate installed on the rotating plate; and
a non-adsorption plate installed on the absorption guide plate and adsorbing the ultra-thin glass seated according to the absorption force of the absorption guide plate;
includes,
The vision module is
a vision vertical frame installed on both sides of the vision rail of the alignment table module;
a non-horizontal frame installed by connecting both upper ends of the non-vertical frame;
a non-horizontal rail installed parallel to the non-horizontal frame;
a vision camera slider unit installed on both sides of the horizontal vision rail and installed to slide;
a vision camera installed in each of the vision camera slider units to photograph the corners of the ultra-thin glass moved by the vision suction plate; and
a vision alignment guide installed under each of the vision cameras to guide an alignment position reference for the edge of the ultra-thin glass;
including,
The bending test unit,
A first bending module and a second bending module on which the ultra-thin glass is seated;
a gap adjusting module for adjusting a gap between the first bending module and the second bending module;
a first rotation module for rotating the first bending plate of the first bending module; and
a second rotation module for rotating a second bending plate of the second bending module;
includes,
The interval control module,
gap control motor; a ball screw connected to the rotation shaft of the interval control motor; It includes a first moving table and a second moving table coupled to a ball screw nut connected to the screw of the ball screw and guided by guiders on both sides to move in a straight line, wherein the direction of the left and right screws with respect to the center of the ball screw is It is formed oppositely, and the first moving table and the second moving table are respectively connected to screws in opposite directions, and the distance between the first and second bending plates is adjusted within a range of 1 to 10 mm. A bending test method of ultra-thin glass.
delete delete The method according to claim 1,
As a result of the ultra-thin glass loading step (S10), if it is determined that there is no ultra-thin glass accommodated in the uppermost tray loaded in the first tray shuttle unit, the tray located at the uppermost end of the first tray shuttle unit is transferred through the first tray transfer unit Tray 1-2 transfer step of transferring to the second tray shuttle unit (S80);
A bending test method of ultra-thin glass comprising a.
The method according to claim 1,
As a result of the ultra-thin glass unloading step (S70), if it is determined that there is no ultra-thin glass that can be accommodated in the uppermost tray loaded in the third tray shuttle unit, the tray of the second tray shuttle unit is transferred through the second tray transfer unit. A bending test method of ultra-thin glass including a tray 2-3 transfer step (S90) of transferring to the third tray shuttle unit.

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