KR100676071B1 - Automatic transport system of tray transport for backlight unit - Google Patents

Abstract

Backlight unit (hereinafter referred to as "BLU") in which functional films are stacked is mounted on a tray that is transported along a two-stage conveyor that is orbitally moved, so that various defects such as white spots and scratches including foreign matter present on the surface and interlayers of the BLU are included. As the horizontal transfer to the laboratory for detecting and the lifting and lowering of the tray, the BLU is deodorized by the lifting means after the inspection is completed, since the tray is repeatedly moved horizontally and vertically along the two-stage conveyor, it contains foreign substances present in the BLU. In order to carry out the task of detecting various defects in the laboratory,

The tray automatic transfer system for transferring the backlight unit according to the present invention includes a tray to which the assembled backlight unit is detachably mounted;

A two-stage unit conveying unit consisting of conveyors for orbital movement, which are continuously installed repeatedly in sections, each conveyor for conveying the tray in the front-rear direction when driving the drive means;

Lifting means which is installed at the left and right ends of the unit transfer unit, the lifting means for lifting the tray transported according to the conveyor drive for each section,

A transporting roller rotatably installed at left and right sides of the examination room for detecting defects including foreign matter present on the surface of the backlight unit and between layers, by image signal processing acquired by line scanning of the camera;

It is installed to reciprocate while maintaining a constant speed along the guide rail installed below the inspection chamber corresponding to the section of the transport roller, and lifts the tray transferred from the conveyor to the transport roller from the transport roller by the lifting plate. A transfer jig for transferring a predetermined section along the guide rail,

And a control unit for controlling the unit transfer unit, the lifting unit, the transfer roller, and the transfer jig drive.

Backlight Unit, Camera, Inspection, Tray, Lifting, Automatic Transfer System

Description

Automatic transport system of tray transport for backlight unit             

1 is a schematic overall configuration diagram of a tray automatic transfer system for transferring a backlight unit according to the present invention.

Figure 2 is a flow chart showing the operation sequence of the tray automatic transfer system for transfer of the backlight unit according to the present invention;

3 is an exploded perspective view of the tray shown in FIG. 1, FIG.

4 is a perspective view of a unit transfer unit for each section for transferring the tray shown in FIG.

FIG. 5 is a view of a power connection unit for automatically lighting a lamp for illuminating the backlight unit shown in FIG. 1;

Figure 6 is a view of the lifting means installed on both ends of the unit transport unit shown in FIG.

7 is a schematic view in the laboratory section shown in FIG.

FIG. 8 is a view illustrating a transfer jig driving unit installed in an inspection room section shown in FIG. 1.

* Explanation of symbols used in the main part of the drawing

10; Backlight Unit (BLU)

12; conveyor

14; camera

16; Laboratory

18; Guide rail

20; Transfer jig

22; 2nd clamp

24; 1st hydraulic cylinder

26; Slider

28; Joiner

30; Iron blower

32; Power plug

34; First sliding part

36; Guider

38; Home

40; Body

42; Elastic member

The present invention mounts a backlight unit (hereinafter referred to as "BLU") in which functional films are stacked on a tray that is transported along a two-stage conveyor that is orbited so that foreign matters exist on the surface and interlayer of the BLU. The present invention relates to an automatic transfer system for a tray for transporting a backlight unit to transfer to an inspection room that detects various defects such as white spots, scratches, and the like, and transfers the inspected BLU to a subsequent process along the conveyor.

More specifically, the tray equipped with the BLU is moved horizontally to the examination room by driving the conveyor, and the tray is repeatedly horizontally moved along the two-stage conveyor by lifting and lowering the tray where the BLU is taken out by the lifting means after the inspection is completed. And a tray automatic transfer system for transporting a backlight unit to vertically move to continuously perform a task of detecting various defects including foreign matter present in a BLU in a laboratory.

In general, a BLU for converting light from a light source into planar light is used in a display device such as an LCD (Liquid Crystal Display). The BLU is a light source for generating light, and the light from the light source is spread over an entire area. A light guide plate that makes it uniform, a reflector that reflects the light exiting to the back side of the light guide plate back to the light guide plate, a diffuser plate that diffuses the light toward the front side through the light guide plate, and a light directing plate that condenses the light vertically (aka, "prism sheet" "," And the like.

In order to manufacture the above-described BLU, a reflecting plate, a diffusion plate, a prism sheet (polarizing plate), and the like are laminated on a light guide plate including a light source. At this time, foreign matter may enter between each plate, and a light guide plate, a reflecting plate, a diffusion plate, or a polarizing plate having stains or scratches on the surface thereof may be stacked. This may cause various defects such as foreign matter, white spots, black spots, stains, and scratches on the BLU.

In order to check various defects including foreign substances existing in the BLU, several BLUs are sampled from the assembly line, and the BLU is turned on manually, wait for the lamp to stabilize, and then shake the BLU with the naked eye of the operator. Foreign matter will be inspected. This visual inspection not only takes a lot of inspection time, but also causes a labor cost increase due to a large number of inspection personnel, which has a problem of lowering productivity.

In addition, the visual inspection of the operator adds to the eye fatigue of the inspector, and it is impossible to check the location of the defects of the BLU, so that the accurate inspection cannot be performed. There is a problem falling.

In addition, since the input time and the output end of the BLU are the same, a cycle time for detecting a defect is increased, thereby degrading practicality and economy.

An object of the present invention, the process of injecting the BLU into the laboratory by the conveyor drive, the inspection process for detecting various defects including foreign matter present on the surface and interlayer of the BLU, lifting the tray for transferring the inspected BLU to the subsequent process The present invention provides an automatic tray transfer system for transporting a backlight unit to automate a series of processes to shorten inspection time and improve workability and productivity.

Another object of the present invention is to significantly reduce the operator's eye fatigue and improve the reliability of the inspection value by detecting various defects through line scanning of the BLU by a plurality of cameras capable of vertical and viewing angle images. It is to provide an automatic tray transfer system for the transfer of the backlight unit.

Still another object of the present invention is to provide an automatic tray transfer system for transporting a backlight unit, which minimizes the operator's input to detect foreign substances and defects present in the BLU, thereby reducing the labor cost.

An object of the present invention described above, the assembled tray is detachably mounted to the backlight unit;
A drive means including a drive motor and a speed reducer;

A two-stage unit transfer unit consisting of conveyors having orbital motions repeatedly installed in sections and continuously conveying the trays in the front and rear directions when driving the drive means;

Lifting means which is installed at the left and right ends of the unit transfer unit, the lifting means for lifting the tray transported according to the conveyor drive for each section,

A transporting roller rotatably installed at left and right sides of the examination room for detecting defects including foreign matter present on the surface of the backlight unit and between layers, by image signal processing acquired by line scanning of the camera;

It is installed to reciprocate while maintaining a constant speed along the guide rail installed below the inspection chamber corresponding to the section of the conveying roller, and lifts the tray transferred from the conveyor to the conveying roller from the conveying roller by the lifting plate. A transfer jig for transferring a predetermined section along the guide rail,

It is achieved by providing an automatic transfer system for a tray unit transfer tray for backlight unit, characterized in that it comprises a control unit for controlling the unit transfer unit, lifting means, the transfer roller and the transfer jig drive.

According to a preferred embodiment of the present invention, the above-described tray,

And a first clamp for detachably fixing the side of the backlight unit seated on the tray in the X-axis direction and a second clamp for detachably fixing the side of the backlight unit seated in the tray in the Y-axis direction.

In addition, the above-mentioned lifting means,

And a lifter installed to lift the end of the unit transfer unit, a first hydraulic cylinder for lifting or lowering the tray seated on the lifter by lifting the lifter, and guiders installed on the left and right sides of the lifter to guide the lifter vertical lifting.

In addition, the above-mentioned transfer jig,

A slider for reciprocating at a constant speed corresponding to the length of the laboratory along the guide rail, a top plate mounted on the slider so that the slider can be lifted, and a tray mounted between the slider and the top plate and equipped with a backlight unit are transport rollers from the conveyor. And a second hydraulic cylinder which lifts the tray from the transfer roller by lifting the upper plate upon movement.

In addition, the above-mentioned top board,

Formed diagonally on the upper surface of the upper plate to correspond to the coupling hole formed in the bottom surface of the tray, coupled to the coupling hole when the upper plate is lifting is provided with a coupling projection to prevent the backlight unit flows during tray transfer.

In addition, the above-described unit transfer unit is repeatedly installed in the upper transfer line of the two-stage unit transfer line, it is provided with an iron blower to suppress the generation of static electricity in the backlight unit mounted on the tray.

In addition, the tray described above,

The fixing positions of the first and second clamps are formed in left and right symmetry so that the backlight unit can be mounted on the tray in the left or right direction of the unit transfer unit.

In addition, the lighting means for lighting the lamp mounted on the tray when the above-described backlight unit is mounted on the tray,

The first sliding part for sliding the power plug connected to the lamp, the power jack connected to the lamp, the power jack connected to the power plug in the X-axis direction, and the first sliding part in the Y-axis direction by sliding the examination section. A second sliding part for moving is provided.

In addition, the tray described above,

It is rotatably mounted at the four corners of the tray, and has a roller that minimizes the flow of the tray by contacting a guider installed outside the conveyor when transferring the tray along the conveyor.

In addition, the first and second clamps described above,

A body mounted on the tray and having a moving groove formed in the X-axis and Y-axis directions, a fixing pin for pressing and fixing the side surface of the backlight unit moving along the moving groove and seated on the tray, and pressing the fixing pin to the tray. It is provided with an elastic member for elastically biasing the fixing of the backlight unit to the initial state.

In addition, the above-described lifter is provided on one side, and is provided with an anti-shock roller to prevent the tray from colliding with the side of the lifter when the tray is transferred from the unit transfer unit to the lifter.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to describe in detail enough to enable those skilled in the art to easily practice the invention, and therefore It is not intended that the technical spirit and scope of the present invention be limited.

As shown in Figures 1 to 8, the tray automatic transfer system for transporting the backlight unit according to the present invention, the tray 11, the assembled backlight unit 10 (BLU) is detachably mounted, and orbital movement Conveyors 12 to be repeatedly installed in each section successively, the tray 11 to each conveyor 12 for transporting the drive means (refer to the drive motor (M) and reducer (R)) in the front and rear direction when driving. It is provided with a two-stage unit transfer unit 13 and a lifting means for lifting the tray 11 which is installed at the left and right ends of the unit transfer unit 13 and lifted by the conveyor 12 for each section. do.

At this time, the tray 11 described above, the first clamp 21 for pressing the side of the BLU 10 seated on the tray 11 in the X-axis direction to be detachably fixed, and the BLU seated on the tray 11. (10) A second clamp (22) for pressing the side surface in the Y-axis direction to be detachably fixed.

In addition, a predetermined section on the left and right sides of the examination room 16 which detects various defects including foreign matter present on the surfaces and layers of the BLU 10 described above by image signal processing obtained by line scanning of the cameras 14 and 15. It is provided with a conveying roller 17 rotatably installed when driving the drive means not shown.

At this time, the above-described camera 14 is installed to adjust the height and the inclination angle, and the most effective to detect and detect various defects, including foreign matter, white spots, black spots, stains, etc. existing on the surface and interlayer of the BLU (10). It means a viewing angle image acquisition camera for line-scanning the BLU 10 to a predetermined inclination angle (preferably 40 ° to 45 °), the camera 15 is installed to enable height adjustment, the BLU 10 Refers to a vertical image acquisition camera for vertically line scanning.

In addition, it is installed to reciprocate a certain section by maintaining a constant speed along the guide rail 18 provided below the examination room 16 to correspond to a predetermined section in which the above-described transport roller 17 is installed, to the conveyor 12 The transfer jig 20 for lifting a predetermined section along the guide rail 18 by lifting from the transfer roller 17 by the upper plate 19 lifting the tray 11 transferred to the transfer roller 17 from Equipped.

In addition, a control unit (not shown) for controlling the above-described unit transfer unit 13, lifting means, the transfer roller 17 and the transfer jig 20 is provided.

In addition, the above-mentioned lifting means, the lifter 23 is provided to be raised and lowered on the left and right ends of the unit transfer unit 13, and lifts the lifter 23 to lift the tray 11 seated on the lifter 23 or A first hydraulic cylinder 24 for lowering and a rod-shaped guider 25 provided on the left and right sides of the lifter 23 and guiding the vertical lift of the lifter 23 are provided.

In addition, the above-described transfer jig 20,

A slider 26 reciprocating at a constant speed at a constant section corresponding to the length of the examination room 16 along the guide rail 18, a top plate 19 mounted on the slider 26 so as to be elevated, and a slider 26 and a top plate. When the tray 11 mounted between the 19 and the BLU 10 is moved from the conveyor 12 to the conveying roller 17, the upper plate 19 is lifted by lifting the tray from the conveying roller 17. A second hydraulic cylinder 27 for lifting 11 is provided.

In addition, the above-mentioned upper plate 19,

It is formed diagonally on the upper surface of the upper plate 19 to correspond to the coupling hole 28 formed on the bottom surface of the tray 11 described above, and is coupled to the coupling hole 28 when the upper plate 19 is lifted. BLU (10) is provided with a coupling protrusion 29 to prevent flow.

In addition, the above-described unit transfer unit 13 is repeatedly installed in at least one or more places in the upper transfer line of the two-stage unit transfer line, the iron to suppress the generation of static electricity in the BLU (10) mounted on the tray 11 And a blower 30 (ion blower).

In addition, the tray 11 described above,

The fixing positions of the first and second clamps 21 and 22 are formed in left-right symmetry so that the BLU 10 can be mounted on the tray 11 in the left or right direction of the unit transfer unit 13.

In addition, the tray 11 described above,

The tray 11 is rotatably mounted at four corners, and is moved in contact with the guider 36 (referring to the fence) installed outside the conveyor 12 when the tray 11 is transported along the conveyor 12. It has a roller 37 to minimize the thing.

In addition, the lighting means for lighting the lamp 31 mounted on the tray 11 when the above-described BLU 10 is attached to the tray 11,

The first sliding slide side of the tray 11, which is installed on the side of the tray 11 and slides in the X axis direction, the power plug 32 connected to the lamp 31 and the power jack 33 connected to the power plug 32. A part 34 and a second sliding part 35 which slides the first sliding part 34 in a Y-axis direction by a predetermined section by the inspection chamber 16 section.

In addition, the above-mentioned first and second clamps 21 and 22,

Body 40 mounted on the tray 11 described above and moving grooves 38 and 39 in the X- and Y-axis directions, and moved along the grooves 38 and 39 and seated on the tray 11. Fixing pin 41 for pressing and holding the side of the BLU (10) to be fixed, and an elastic member for elastically biasing as an initial state that the fixing pin 41 is pressed to fix the BLU (10) to the tray 11 ( 42) (compression coil spring is used).

In addition, the impact is provided on one side of the lifter 23 described above, and prevent the tray 11 from colliding with the side of the lifter 23 when the tray 11 is transferred from the unit transfer unit 13 to the lifter 23. The prevention roller 43 is provided.

In the drawings, reference numeral 44 is an iron blower installed at the entrance side of the examination room 16 and suppressing the generation of static electricity including dust on the BLU 11 conveyed inside the examination room 16.

Hereinafter, with reference to the accompanying drawings an example of the use of the tray automatic transfer system for the transfer of the backlight unit according to the present invention will be described in detail.

As shown in FIGS. 1 and 2, a plurality of functional films are mounted on a tray 11 that is lifted and transported according to driving of the first hydraulic cylinder 24 of the lifter 23 located on the left side of FIG. 1. Manually assembled BLU 11 by the operator (see S100).

At this time, the first clamp 21 formed at the edge of the tray 11 is pressed to fix the BLU 11 side surface in the X-axis direction, and at the same time, the second clamp 22 is formed at the edge of the tray 11. Press the BLU (11) side in the Y-axis direction to fix it.

That is, when the fixing pins 41 forming the above-described first and second clamps 21 and 22 are rotated, respectively, the fixing pins 41 are formed by the restoring force of the elastic member 42 in the body 40. Since it moves along the moving grooves 38 and 39 formed in the X- and Y-axis directions, the BLU 10 can be prevented from flowing during the tray 11 transfer.

On the other hand, as shown in Figure 5, after mounting the BLU (10) to the tray 11 described above, the first sliding portion 34 with respect to the power plug 32 provided on the tray 11 side X-axis direction As the sliding movement is performed, the power jack 33 formed in the first sliding portion 34 is automatically connected to the power plug 32. As a result, the lamp 31 installed in the tray 11 is turned on so that the BLU 10 moved to the examination room 16 can be irradiated.

The tray 11 equipped with the above-described BLU 10 is a rotatable transfer formed corresponding to the length of the examination room 16 by driving the conveyor 12 for each section of the upper unit transfer unit of the two-stage unit transfer unit 13. It moves to the roller 17 for a reference (refer S200). The vertical height of the conveying roller 17 has the same height as the vertical height of the conveyor 12.

At this time, the tray 11 is transported according to the above-described driving of the conveyor 12, and at the same time, the power jack 33 is formed by the second sliding part 35 which slides a predetermined section by the section of the examination room 16 in the Y-axis direction. The first sliding part 34 is moved in the forward and backward directions.

As shown in FIG. 7 and FIG. 8, when the above-described tray 11 is conveyed to the conveying roller 17, the guide rail 18 provided below the examination room 16 by the section in which the conveying roller 17 is installed. The top plate 19 of the slider 26 coupled to) is lifted in accordance with the driving of the second hydraulic cylinder 27. As a result, the coupling protrusion 29 protruding diagonally on the upper surface of the upper plate 19 is coupled to the coupling hole 28 formed on the bottom surface of the tray 11, thereby lifting the tray 11 from the transport roller 17. I can raise it.

At this time, the tray 11 lifted by a certain height from the conveying roller 17 passes through the examination room 16 along the guide rail 18 installed to reciprocate while maintaining a constant speed for the examination room 16 section. (See S300).

When the BLU 10 mounted on the tray 11 passes through the test chamber 16 along the guide rail 18 while the lamp 31 installed on the tray 11 is turned on, the test room 16 By acquiring images by line scanning of the cameras 14 and 15 installed therein, various defects including foreign matters, white spots, black spots, stains, scratches, etc. present on the surface and interlayer of the BLU 10 can be detected (see S400). .

In detail, the BLU 10 is vertically line-scanned by the aforementioned vertical image acquisition camera 15 while the BLU 10 is transported at a constant speed at a constant speed, and at the same time, the viewing angle image is installed to be inclined at a predetermined angle. The BLU 10 is line-scanned at a predetermined inclination angle (40 to 45 degrees is preferably used) by the thermal camera 14.

The image signals obtained by the line scanning of the cameras 14 and 15 described above may detect various defects including foreign matter present on the surface and the layers of the BLU 10 by image signal processing of a controller (not shown). Can be. In addition, the results of defects and defect positions detected from the BLU 10 may be monitored by a monitor not shown and output through a printer (not shown).

The tray 11 equipped with the inspected BLU 10 while passing through the inspection chamber 16 along the above-described guide rail 18 is driven by the second hydraulic cylinder 27 to lower the conveyance jig 20 to move the conveyor ( 12), the transfer jig 20 is returned to the initial position (meaning to return to the entrance to the examination room 16) along the guide rail 18 (see S500).

In accordance with the operation of the conveyor 12 for each section, the BLU 10 mounted on the tray 11 transferred from the examination room 16 is manually taken out by an operator and sent to a subsequent process (see S600).

As shown in FIG. 6, the tray 11 from which the above-described BLU 10 is taken out is lowered due to the lowering of the lifter 23 located on the right side of the drawing, and then forms a two-stage unit transfer unit 13. In accordance with the operation of the conveyor 12 for each section of the lower unit transfer unit, the tray 11 is transferred in the left direction in the drawing (see S700).

As described above, after the tray 11 is lifted upward by the lifter 23 located on the left side in accordance with the operation of the conveyor 12 for each section of the lower unit transport unit, the section of the upper unit transport unit The BLU 10 is mounted on the tray 11 transported by the star conveyor 12, and the tray 11 on which the BLU 10 is mounted is transferred to the examination room 16, and the camera ( 14, 15 detects a defect by line scanning the BLU 10, and transfers the tray 10 equipped with the inspected BLU 10 to repeat the process of moving the BLU 10 to a subsequent process. .

As described above, the automatic tray transfer system for transferring the backlight unit according to the present invention has the following advantages.

The process of inputting the BLU into the laboratory by horizontal driving of the conveyor, the inspection process of detecting various defects including foreign substances present on the surface and the floor of the BLU, and lifting and turning the tray to horizontally transfer the inspected BLU to the subsequent process. By automating all work processes, inspection time can be significantly reduced.

In addition, by detecting various foreign matters and defects from the BLU through the line scanning of the BLU by a plurality of cameras capable of vertical and viewing angle images, it is possible to significantly reduce the operator's eye fatigue and improve the reliability of the inspection value.

In addition, by minimizing worker input to detect foreign substances and defects present in the BLU, labor costs can be reduced to increase the competitiveness of products in the industry.

Claims (11)

A tray on which the assembled backlight unit is detachably mounted; Drive means including a drive motor and a speed reducer; A two-stage unit conveying unit having an orbital conveyor continuously installed for each section and configured to convey the tray in the front-rear direction when driving the driving means; Lifting means installed on the left and right ends of the unit transfer unit to lift and lift the tray which is transported according to the conveyor driving for each section; A transporting roller rotatably installed at left and right sides of an examination room that detects defects including foreign substances present on the surface and layers of the backlight unit by image signal processing acquired by line scanning of a camera; It is installed to reciprocate while maintaining a constant speed along the guide rail installed below the inspection chamber corresponding to the section of the conveying roller, from the conveying roller by the upper plate lifting the tray conveyed from the conveyor to the conveying roller A transfer jig for lifting a predetermined section along the guide rail by lifting; And And a control unit for controlling the unit transfer unit, the lifting means, the transfer roller, and the transfer jig drive. The method according to claim 1, wherein the tray, And a first clamp for detachably fixing the side of the backlight unit seated on the tray in the X-axis direction, and a second clamp for detachably fixing the side of the backlight unit seated in the tray in the Y-axis direction. Tray automatic transfer system for the transfer of the backlight unit. The method according to claim 1, wherein the lifting means, A lifter installed to elevate the end of the unit transfer unit; A first hydraulic cylinder for elevating or lowering the tray seated on the lifter by elevating the lifter; And And a guider installed at left and right sides of the lifter to guide the lifter vertical lift. The method according to claim 1, wherein the transfer jig, A slider which is reciprocated at a constant speed at a constant section corresponding to the length of the laboratory along the guide rail; An upper plate mounted to the slider to be liftable; And And a second hydraulic cylinder mounted between the slider and the upper plate and lifting the upper plate when the tray on which the backlight unit is mounted moves from the conveyor to the transport roller to lift the tray from the transport roller. Automatic tray feed system for unit transfer. The method according to claim 4, The top plate, The backlight unit is formed in a diagonal direction on the upper surface of the upper plate corresponding to the coupling hole formed in the bottom surface of the tray, and coupled to the coupling hole when the upper plate is lifted, and has a coupling protrusion to prevent the backlight unit from flowing during tray transfer. Automatic tray feed system. The method according to claim 1, The unit transfer unit is installed in the upper transfer line of the two-stage transfer line is repeatedly formed, the tray tray for automatic transfer of the backlight unit, characterized in that it comprises an iron blower to suppress the generation of static electricity in the backlight unit mounted on the tray system. The method according to claim 1 or 2, wherein the tray, And the fixing positions of the first and second clamps are symmetrically formed so that the backlight unit can be mounted on the tray in a left or right direction of the unit transfer unit. The method of claim 1, wherein the lighting means for lighting the lamp mounted on the tray when the backlight unit is mounted on the tray, A power plug installed at a side of the tray in a conveying direction and connected to a lamp; A first sliding part which slides a power jack connected to the power plug in an X-axis direction; And And a second sliding part configured to slide the first sliding part in the Y-axis direction as much as the examination room section. The method according to claim 1 or 2, wherein the tray, And a roller which is rotatably mounted at the four corners of the tray and minimizes the flow of the tray by contacting a guider installed outside the conveyor when the tray is transported along the conveyor. The method of claim 2, wherein the first and second clamps, A body mounted to the tray and having a moving groove formed in the X-axis and Y-axis directions; A fixing pin that moves along the moving groove and presses and fixes a side surface of the backlight unit seated on the tray; And And an elastic member for biasing the fixing pin to elastically bias the fixed fixing unit of the backlight unit to the tray. The tray of claim 3, further comprising an impact prevention roller installed on one side of the lifter to prevent the tray from colliding with the side of the lifter when transferring the tray from the unit transfer unit to the lifter. Automatic transfer system.

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