KR101012452B1 - Light guide plate side serration pattern manufacturing system using laser - Google Patents

Abstract

PURPOSE: A light guide plate side serration pattern processing system using the laser is provided to improve the processing yield. CONSTITUTION: A light guide plate support(200) is arranged to be moving in straight on a table(100). While the pattern processing is implemented, a position of a plurality of light guide plates(A) is fixed. A light guide plate position setting unit(300) aligns the pattern processing position of the plurality of light guide plates.

Description

LIGHT GUIDE PLATE SIDE SERRATION PATTERN MANUFACTURING SYSTEM USING LASER}

The present invention relates to a light guide plate pattern processing apparatus, and more particularly, to a light guide plate pattern processing system for processing a serration pattern on a side surface of a light guide plate using a laser.

The display device occupies a key position among the video devices of the information and communication era in the form of a liquid crystal of a mobile phone, a TV screen, a computer monitor.

Display devices are evolving into flat panel displays, such as LCDs and OLEDs, with the development of technology, starting with CRTs.

An LCD is a display device using a modulation of light by a liquid crystal cell that converts a molecular array by applying a voltage to a specific molecular array of the liquid crystal and converts a change in optical properties of the liquid crystal cell that emits light by the molecular array into a visual change.

Here, since the liquid crystal used in the LCD is a light receiving element that does not emit light by itself, a separate light source for emitting the liquid crystal is required. As the light source used in the liquid crystal display device, a cold cathode fluorescent lamp (CCFL), which is a linear light source, is used, but the cold cathode fluorescent lamp (CCFL) has a disadvantage that the price increases as the screen is enlarged. LEDs are expensive, but their use is rapidly increasing due to their long life, excellent color reproducibility, low power consumption and eco-friendly products.

On the other hand, an LCD uses a light guide plate to uniform the luminance distribution on the front of the display. The light guide plate changes a line light source or a point light source incident from a light source into a surface light source. The light flowing from the light source into the light guide plate has a non-uniform light distribution by repeating optical processes such as reflection, total reflection, refraction, and transmission, and induces it to uniform brightness and reduces light loss by using two-dimensional light dispersion pattern. To form a surface light source.

On the other hand, as it is changed to LED in the form of a point light source, in contrast to the case of the line light source using the CCFL, EEFL, etc., the appearance problem is raised by the dark part and hot spot between the point light sources, Nevertheless, there is a situation that does not solve the quality problem between the point light source.

In addition, the above problems will be more and more highlighted due to LED performance improvement and reduction of LED devices due to low price policies, and an alternative to this situation is urgently required.

In order to improve this problem and improve the appearance quality of the entire backlight, a method of forming a serration pattern on the light incident part side of the light guide plate is used. .

Conventionally, in order to process the side serration pattern, the light guide plate is manufactured by injection molding using an injection core, or processed using a laser.

However, in order to manufacture the light guide plate on which the side serration pattern is formed through injection molding, since the production is performed one by one, there is a disadvantage in that productivity is lowered due to low product yield.

In addition, in the conventional method of processing the side serration pattern using a laser, as described in Korean Patent Application No. 10-2007-0016203, a moving assembly in which a light guide plate is accommodated moves on a table and a serration pattern is formed. However, according to the disclosed method, since the laser assembly is performed while the mobile assembly accommodating the light guide plate moves left and right, processing errors may occur due to vibration generated during the movement. In this case, there is a problem of inferior processing reliability.

In addition, as the size of the light guide plate is gradually increased, a processing system capable of stably moving the light guide plate for processing is required.

An object of the present invention is to solve the above-described problems, to provide a pattern processing system capable of forming a side serration pattern at a time using a laser in a state in which a plurality of light guide plates are fixed.

In addition, another object of the present invention is to provide a pattern processing system that can form the side serration pattern by simply adjusting the position of the laser to correspond to various sizes of the light guide plate.

In addition, another object of the present invention is to provide a pattern processing system that can increase the reliability of the process by processing the side serration pattern by stably moving and fixing the position even if the size of the light guide plate is enlarged.

One aspect of the present invention for achieving the above technical problem relates to a light guide plate pattern processing system. The light guide plate pattern processing system of this invention is a table; A light guide plate support provided on the table to support the light guide plate so that a plurality of light guide plate positions are fixed during pattern processing; A light guide plate positioner for setting the light guide plate position such that the pattern processing positions of the plurality of light guide plates are mutually aligned; A pattern processing unit for processing a pattern on the plurality of light guide plates supported by the light guide plate support with a laser; It characterized in that it comprises a support for transferring the light guide plate support linearly moving to the pattern processing portion.

According to an embodiment, the light guide plate support includes: a support base provided with a linear movement along the support transfer part and having a plurality of light guide plates mounted on an upper surface thereof; A support frame coupled to an upper region of the support base; A vertical press plate provided between the support base and the support frame to press the upper and lower sides of the plurality of light guide plates to closely contact each other; A rotating plate provided in an upper region of the support base to rotate a loading direction of the plurality of light guide plates; It is provided in the upper region of the support frame includes a dust collecting portion for sucking the dust generated during the pattern processing by the pattern processing unit.

According to one embodiment, the light guide plate positioning unit includes a "a" shaped positioning frame provided at one side of the table and in close contact with edge regions of the plurality of light guide plates to align positions of the plurality of light guide plates; And a frame moving part which moves the position of the positioning frame to closely contact the plurality of light guide plates.

According to one embodiment, the pattern processing unit, the processing frame; A laser oscillation unit for oscillating the laser to process a pattern on the light guide plate surface; And a focus setter configured to adjust focus by moving up and down positions of the laser oscillator, wherein the laser oscillator is movable up and down to form a continuous pattern on the light guide plate surface.

According to one embodiment, the support transfer portion, the guide rail is grooved to the lower region of the support base to guide the movement of the support base; It includes a rail driving unit for generating a driving force to move the support base along the guide rail.

According to one embodiment, further comprising a moving cart for moving the plurality of light guide plates to the support base, the moving cart comprises: a bogie body moved by a wheel; A floating part on which the light guide plate is loaded; It is provided between the balance body and the floating portion includes a height adjusting unit for adjusting the height so that the height of the floating portion corresponds to the height of the support base.

The light guide plate pattern processing system according to the present invention can process the side serration pattern more stably and precisely because the pattern processing unit moves up and down and processes the serration pattern while the position of the light guide plate is fixed on the light guide plate support.

In addition, since the plurality of light guide plates are processed together with the light guide plate support fixed thereto, the plurality of light guide plates may be processed at once. Accordingly, the processing yield can be improved.

In addition, since the focus is adjusted by adjusting the height of the focus setting part up and down, the serration pattern can be easily processed by being compatible with light guide plates of different sizes.

In addition, since the dust generated during the laser processing is sucked out and removed immediately, the lens of the laser oscillator can be kept clean at all times.

In addition, since the moving cart moves the light guide plate, it is possible to stably move the large light guide plate, thereby reducing the risk of carrying the worker.

1 is a schematic view showing the configuration of a light guide plate pattern processing system of the present invention,
2 and 3 are schematic views showing the configuration of the support base of the light guide plate pattern processing system of the present invention,
4 and 5 are schematic views showing the configuration of the pattern processing portion of the light guide plate pattern processing system of the present invention,
6 is a schematic view showing the configuration of a mobile truck of the light guide plate pattern processing system of the present invention;
7 is an exemplary view illustrating the shape of various side serration patterns that can be processed by the light guide plate pattern processing system of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

Figure 1 is a schematic diagram showing the overall configuration of a light guide plate pattern processing system 1 according to the present invention, Figures 2 and 3 is a configuration of the light guide plate support 200 and the light guide plate positioning unit 300 of the present invention It is a schematic diagram shown.

As shown, the light guide plate pattern processing system 1 according to the present invention is provided with a table 100 and a linearly movable member on the table 100 so that the light guide plate A positions are fixed while the pattern processing is in progress. The light guide plate support 200 for stably supporting (A), the light guide plate positioner 300 for setting the light guide plate position so that the pattern processing positions of the plurality of light guide plates A are mutually aligned, and the light guide plate support 200 with a laser. A pattern processing unit 400 for processing the side serration pattern a on the plurality of light guide plates supported on the support plate, a support transfer unit 500 for linearly moving the light guide plate support 200 to the pattern processing unit 400, and the light guide plate A; It includes a moving cart 600 to move the light guide plate support 200.

Here, in the light guide plate pattern processing system 1 according to the present invention, a plurality of light guide plates A are moved and processed at once. To this end, the plurality of light guide plates are moved in a state of being stacked on each other. The worker loads the plurality of light guide plates in the dummy on the mobile trolley 600, and is loaded in the dummy light guide on the light guide plate support 200.

The table 100 supports the position of each component so that pattern processing can proceed stably. The table 100 is provided at both sides of the support transfer unit 500, and fixes the positions of the light guide plate positioning unit 300 and the pattern processing unit 400.

The light guide plate support 200 fixes the position of the light guide plate A moved through the moving cart 600 during pattern processing. The light guide plate support 200 is provided to be capable of linearly moving between the receiving position receiving the light guide plate A from the moving cart 600 and the processing position where the processing is performed in the pattern processing unit 400 through the support transfer unit 500. . In this case, since the plurality of light guide plates are moved in a fixed state on the light guide plate support 200, there is no change in position so that the pattern may be processed accurately.

The light guide plate support 200 includes a support base 210 that is movable on the support transfer part 500, a support frame 220 coupled to an upper region of the support base 210, and a support base 210. The lower pressure plate 230 and the upper pressure plate 240 for fixing the position by pressing the upper and lower surfaces of the plurality of light guide plates A and the rotating plate 250 for changing the directions of the light guide plate A loaded on the support base 210. And a dust collecting part 260 coupled to the support frame 220 to collect dust generated from the surface of the light guide plate A when the pattern processing part 400 is processed.

As shown in FIGS. 2 and 3, the support base 210 is formed of a plate-like material having a predetermined area, and a plurality of light guide plates A are mounted on an upper surface thereof. Rail coupling groove 211 is formed in the lower surface of the support base 210 in the upward direction. The rail coupling groove 211 is coupled to the guide rail 510 of the support transfer part 500, and the support base 210 is linearly moved to the pattern processing part 400 by the driving force of the rail driving part 520.

The support frame 220 is formed to stand on the support base 210 to support the positions of the plurality of light guide plates A to be fixed. The upper pressing plate 240 is coupled to the support frame 220 to be liftable to press the plurality of light guide plates A. In addition, the dust collecting part 260 is coupled to the support frame 220 to suck dust generated from the light guide plate A.

The lower pressing plate 230 and the upper pressing plate 240 press the upper and lower surfaces of the plurality of light guide plates A moved from the moving cart 600 to the support base 210 to fix the position. The lower pressurizing plate 230 and the upper pressurizing plate 240 are adjusted by the lifting cylinders 231 and 241 (see FIG. 4) which are lifted according to whether the hydraulic fluid of the hydraulic supply unit 270 is supplied. The lower pressurizing plate 230 and the upper pressurizing plate 240 may press the upper and lower surfaces of the plurality of light guide plates A to closely contact each other and fix the position to increase the precision of pattern processing.

The rotating plate 250 is rotatably provided on the upper surface of the support base 210. The rotating plate 250 rotates the loading direction so that the processing surface on which the serration pattern of the light guide plate A loaded on the upper surface is to be processed faces the pattern processing unit 400. The rotating plate 250 is rotated by receiving a driving force by the rotation driving unit 255 such as a motor.

The dust collector 260 is provided in the upper region of the support frame 220 to suck in dust generated during light guide plate pattern processing. The dust collecting unit 260 includes a plurality of dust collection heads 261 formed toward the processing surface of the light guide plate A, and a suction pump 263 connected to the dust collection head 261 to generate suction force. When the surface of the light guide plate A is processed by the laser generated by the pattern processing unit 400, the dust collector 260 generates a suction force and sucks dust through the dust collection head 261. This allows the processing environment to be kept clean at all times.

The light guide plate positioning unit 300 aligns positions of the plurality of light guide plates A transferred from the moving cart 600 to the light guide plate support 200. The light guide plate positioning unit 300 includes a positioning frame 310 provided to be in contact with the edge of the light guide plate A, and a frame moving part 320 for moving the position of the positioning frame 310 to contact the light guide plate A. ).

The light guide plate positioning unit 300 presses edge regions of the plurality of light guide plates A, which are transferred in a dummy state in which positions are not aligned, on the light guide plate support 200 so that the positions are aligned. As a result, the pattern processing surface may be flattened.

The frame moving unit 320 moves the position of the positioning frame 310 back, front, left, and right with respect to the table 100, thereby aligning the positions of the plurality of light guide plates A, and bringing close contact with them.

The frame moving part 320 includes a driving source such as a motor and a transmission member such as a gear for transmitting the driving force of the driving source to the positioning frame 310.

  4 and 5 are schematic diagrams schematically showing the configuration of the pattern processing portion 400 of the light guide plate pattern processing system 1 according to the present invention. As illustrated, the pattern processing unit 400 includes a processing frame 410 fixedly coupled to the table 100, a focus setting unit 420 coupled to the lifting frame 410 to be elevated, and a focus setting unit 420. The laser oscillation unit 430 coupled to the light guide plate A and the laser oscillation unit 430 to process the pattern and the focus setting unit 420 are moved up and down to adjust the focus, and the pattern is continuously connected to the light guide plate A. It includes a processing transfer unit 440 to be formed.

The processing frame 410 is coupled to the table 100 and provided to cover the outer region of the light guide plate support 200 transferred through the support transfer unit 500. The focus setter 420 and the laser oscillator 430 are provided on both sides of the processing frame 410 so that both sides of the light guide plate A can be simultaneously processed.

The focus setting unit 420 may be moved up and down to adjust the focus of the laser oscillator 430 according to the size of the light guide plate A. FIG.

The laser oscillator 430 is moved up and down and performs the Z axis processing of the light guide plate A. FIG.

The processing transfer unit 440 adjusts the Y-axis movement of the laser oscillation unit 430 to adjust the spacing and speed of the processing pattern. The pattern shape can be controlled by adjusting the Z axis feed rate and Y axis feed speed together.

The support transfer unit 500 provides a driving force to move the light guide plate support 200 between the receiving position and the processing position. The support transfer unit 500 controls the position movement so that the light guide plate support 200 is accurately positioned at the processing position of the pattern processing unit 400.

The support transfer unit 500 includes a guide rail 510 coupled to the rail coupling groove 211, and a rail driving unit 520 providing a transfer force so that the support base 210 is transferred along the guide rail 510. .

The rail driving unit 520 allows the guide rail 510 and the support base 210 to be transported by the LM guide method, or the support base 210 by various known transport methods such as a combination of a rack and a pinion or a driving belt or an electric gear. ) Is moved.

6 is a schematic diagram showing the configuration of the moving trolley 600 of the light guide plate pattern processing system 1 according to the present invention.

As shown in the drawing, the moving cart 600 moves the plurality of light guide plates A to the light guide plate support 200. The light guide plate pattern processing system 1 according to the present invention uses a moving cart 600 to easily move a large light guide plate A that is heavy.

The mobile trolley 600 includes a trolley main body 610 provided to be movable by the moving wheel 611, a floating unit 630 provided on the trolley main body 610, and a light guide plate A mounted on an upper surface thereof. It is provided between the balance body 610 and the floating portion 630 includes a height adjusting unit 620 for adjusting the height of the floating portion 630.

The height adjusting unit 620 adjusts the height of the floating unit 630 to correspond to the height of the light guide plate support 200. The operator presses the height adjustment lever 621 to adjust the height by pneumatic or hydraulic pressure.

The floating unit 630 loads a plurality of light guide plates A on an upper surface thereof. On the plate surface of the floating part 630, a plurality of floating balls 631 are provided at a predetermined interval to rotate to facilitate the unloading of the light guide plate A.

The light guide plate pattern processing of the light guide plate pattern processing system 1 according to the present invention having such a configuration will be described with reference to FIGS. 1 to 7.

First, the worker loads the plurality of light guide plates A on the upper surface of the floating part 630 of the moving cart 600. Then, the moving cart 600 is moved and positioned on the side of the table 100. The height of the floating unit 630 is adjusted to be equal to the height of the light guide plate support 200 using the height adjustment lever 621. The operator presses the light guide plate A and moves it to the upper surface of the light guide plate support 200. At this time, the light guide plate A can be moved more easily by the floating ball 631.

When the plurality of light guide plates A are moved to the support base 210 in a dummy form, an operator presses the side surfaces of the plurality of light guide plates A using a tool such as a hammer. As a result, when the side positions of the plurality of light guide plates A are aligned, the frame moving unit 320 moves the positioning frame 310 to press the edges of the light guide plate A. When the flattening operation is completed to exactly match the processing surfaces of the plurality of light guide plates A by this process, the rotating plate 250 is rotated to adjust the direction of the light guide plate A, and the upper pressure plate 240 and the lower pressure plate 230 are moved. The upper and lower surfaces of the light guide plate A are pushed up and down to pressurize. As a result, the positions of the plurality of light guide plates A are fixed.

When the position of the light guide plate A is fixed to the light guide plate support 200, the rail driving unit 520 is driven to move the support base 210 along the guide rail 510 to a machining position. When the light guide plate support 200 is positioned inside the pattern processing unit 400, the focus setting unit 420 is moved up and down to adjust the focus of the laser oscillator 430 to match the shape of the serration pattern a.

When the focus adjustment is completed, the laser oscillator 430 is moved up and down along the Z axis, the laser oscillates, and the processing transfer part 440 moves along the Y axis, and adjusts the pitch interval to process the serration pattern (a).

After the processing is completed, the plurality of light guide plates A are separated from the light guide plate support 200 and then moved through the moving cart 600.

On the other hand, Figure 7 is an exemplary diagram showing various shapes of the serration pattern (a) processed by the light guide plate pattern processing system 1 according to the present invention.

The pattern processing unit 400 may change the processing width and depth by adjusting the moving speed and the moving position of the laser unit 400 according to the horizontal / vertical aspect ratio of the side serration pattern (a). Thereby, various process patterns and shapes can be processed using one light guide plate pattern processing system 1.

The side serration pattern may be selectively processed according to the type of the product to which the light guide plate is applied and the characteristics of each model, and the side serration pattern having different shapes may be combined into one light guide plate.

As described above, the light guide plate pattern processing system according to the present invention moves the pattern processing part up and down while fixing the position of the light guide plate on the light guide plate support, and processes the serration pattern to more stably and precisely adjust the side serration pattern. I can process it.

In addition, since the plurality of light guide plates are processed together with the light guide plate support fixed thereto, the plurality of light guide plates may be processed at once. Accordingly, the processing yield can be improved.

In addition, since the focus is adjusted by adjusting the height of the focus setting part up and down, the serration pattern can be easily processed by being compatible with light guide plates of different sizes.

In addition, since the dust generated during the laser processing is sucked out and removed immediately, the lens of the laser oscillator can be kept clean at all times.

In addition, since the moving cart moves the light guide plate, the large light guide plate can be stably moved, thereby reducing the risk of the worker.

The embodiment of the light guide plate pattern processing system of the present invention described above is merely exemplary, and it is well understood that various modifications and equivalent other embodiments are possible to those skilled in the art to which the present invention pertains. You will know. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

1: Light guide plate pattern processing system 100: Table
200: light guide plate support 210: support base
211: rail coupling groove 220: support frame
230: lower pressurizing plate 231: lower pressurizing cylinder
240: upper pressing plate 241: upper pressing cylinder
250: rotating plate 255: rotating drive unit
260: dust collector 261: dust collector head
263: suction pump 270: hydraulic supply
300: light guide plate positioning unit 310: positioning frame
320: frame moving part 400: pattern processing part
410: processing frame 420: focus setting unit
430: laser oscillation unit 440: processing transfer unit
500: support transfer unit 510: guide rail
520: rail driving unit 600: light guide plate moving cart
610: balance body 611: moving wheel
620: height adjustment unit 621: height adjustment lever
630: floating portion 631: floating ball

Claims (6)

In the light guide plate pattern processing system,
Table;
A light guide plate support provided on the table to support the light guide plate so that a plurality of light guide plate positions are fixed during pattern processing;
A light guide plate positioner configured to set the light guide plate position so that the pattern processing positions of the plurality of light guide plates are mutually aligned;
A pattern processing unit for processing a pattern on the plurality of light guide plates supported by the light guide plate support with a laser;
It includes a support for transferring the light guide plate support linearly moving to the pattern processing portion,
The light guide plate support,
A support base provided to be linearly movable along the support transfer unit, a plurality of light guide plates mounted on an upper surface thereof, and a rail coupling groove formed on an upper surface thereof;
A support frame coupled to an upper region of the support base;
A vertical press plate provided between the support base and the support frame to press the upper and lower sides of the plurality of light guide plates to closely contact each other;
A rotating plate provided in an upper region of the support base to rotate a loading direction of the plurality of light guide plates;
The light guide plate positioning unit,
It is provided on one side of the table and in close contact with the edge region of the plurality of light guide plate includes a "b" shaped positioning frame for aligning the position of the plurality of light guide plate,
The pattern processing portion,
It includes a laser oscillator for oscillating the laser to process the pattern on the light guide plate surface,
The support transfer unit,
Light guide plate pattern processing system comprising a guide rail which is grooved to the rail coupling groove of the support base to guide the movement of the support base.
The method of claim 1,
The light guide plate support,
The light guide plate pattern processing system further comprises a dust collecting part provided in the upper region of the support frame to suck dust generated during the pattern processing by the pattern processing unit.
The method according to claim 1 or 2,
The light guide plate positioning unit,
The light guide plate pattern processing system further comprises a frame moving unit for moving the position of the positioning frame in close contact with the plurality of light guide plates.
The method according to claim 1 or 2,
The pattern processing unit,
A processing frame;
A focus setting unit which adjusts a focus by moving up and down positions of the laser oscillator;
Further comprising a processing transfer unit for transferring the laser oscillation unit in the Y-axis direction,
The laser oscillator is moved in the upper and lower Z-axis direction and the left and right Y-axis direction to form a continuous pattern on the light guide plate surface, characterized in that the light guide plate pattern processing system.
The method according to claim 1 or 2,
The support transfer unit,
The light guide plate pattern processing system further comprises a rail driving unit for generating a driving force to move the support base along the guide rail.
The method according to claim 1 or 2,
Further comprising a moving cart for moving the plurality of light guide plate to the support base,
The moving cart,
A balance body moved by a wheel;
A floating part on which the light guide plate is loaded;
And a height adjusting part provided between the bogie body and the floating part to adjust a height of the floating part to correspond to a height of the support base.

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