KR101161792B1 - Light guide plate's pattern formation apparatus with upper and low roller adjust - Google Patents

Abstract

PURPOSE: A patterning device of a light guide plate capable of individually powering upper and lower rollers is provided to rapidly perform a marking work on a wide area using an ink marking method. CONSTITUTION: A patterning device(A) of a light guide plate capable of individually powering upper and lower rollers comprises an inlet device(1), a pattern forming device(5), a drive unit(56), and an outlet device(7), and a controller. A transfer unit and a thickness measurement unit are installed on the inlet device. The thickness measurement unit measures the thickness of a light guide plate transferred through the transfer unit. A printing plate for forming patterns on the light guide plate is formed on the outer surface of the pattern forming device. The drive unit comprises first and second drive units for driving upper and lower rollers. The outlet device discharges the patterned light guide plate to the outside. The controller individually controls the first and second drive units.

Description

Light guide plate's pattern formation apparatus with upper and low roller adjust}

The present invention relates to a pattern processing apparatus of a light guide plate, and more particularly, to control the driving of a plurality of rollers that form a pattern on the surface of the light guide plate, respectively, so that the light guide plate can go straight without being twisted during the transfer operation. A pattern processing apparatus for a light guide plate that can be driven individually.

In general, a light guide plate is a component that performs the brightness and uniform illumination function of a backlight unit, and is an acrylic injection molded product in a BLU that guides light to a liquid crystal in a liquid crystal display.

The light guide plate is deposited with a pattern having a certain area and shape on the surface of the light guide plate to uniformly transmit the light emitted from the cold cathode fluorescent lamp (CCFL) to the entire surface of the liquid crystal display device. Evenly distribute the light over.

Ink marking and laser marking are used in the method of depositing a pattern on a light guide plate. Recently, laser marking has become popular due to maintenance and convenience.

As an example of the prior art related to laser marking, the "laser pattern processing apparatus" of Korean Patent Publication No. 0,080,8383 has been disclosed.

The above patent discloses a laser pattern processing apparatus for forming a pattern on a light guide plate, comprising: a laser oscillator for generating a laser beam, a stage on which a light guide plate requiring a pattern is formed by a laser beam generated from the laser oscillator; By diffracting the generated laser beam according to the application of the RF signal having a specific frequency, the laser beam is turned on and off so that the laser beam irradiated to the light guide plate is turned on / off to form a desired pattern on the light guide plate. It is configured to include a modulator.

However, the pattern processing apparatus using the laser beam according to the prior art has a problem in that the work efficiency is low even though the work for forming a pattern is slow and takes a lot of work time.

Meanwhile, the light guide plate pattern processing apparatus by ink marking forms a pattern while passing the light guide plate between a plurality of rollers arranged up and down.

However, in the light guide plate pattern processing apparatus according to the conventional ink marking, since the pattern forming rollers are thermally expanded by heating, and the expansion coefficients are different for each roller, the rotation is generated, which causes the light guide plate to be distorted during transfer, resulting in poor pattern formation. There was a problem.

The present invention has been made to solve the above problems of the prior art, it is possible to quickly perform a marking operation for a large area by using the ink marking method, a plurality of rollers for forming a pattern on the surface of the light guide plate It is an object of the present invention to provide a pattern processing apparatus for a light guide plate that can be individually driven up and down rollers to prevent the light guide plate from being distorted during the transfer operation by controlling the driving left and right.

According to the characteristics of the present invention for achieving the above object, the present invention is a pattern processing apparatus of a light guide plate of the vertically movable roller of the upper and lower rollers capable of performing a pattern marking operation on the light guide plate using the ink marking method, A drawing device equipped with a conveying means for conveying the light guide plate and a thickness measuring means for measuring the thickness of the light guide plate drawn by the conveying means, and a transfer plate for forming a pattern on the surface of the light guide plate, mounted on an outer surface thereof, A pattern forming apparatus having upper and lower pattern forming rollers, heating means for heating the upper and lower pattern forming rollers, and a gap adjusting means for adjusting a gap between the upper and lower pattern forming rollers, and the upper and lower pattern forming rollers. Driving means provided with first and second driving parts for driving the light guide plate having a pattern processed from the pattern forming apparatus; And a control unit for individually controlling the first and second driving units of the driving unit so that the number of rotations of the drawing device equipped with the discharging means for discharging and the rotational speed of the upper and lower pattern forming rollers coincide.

The first driving unit includes a first gear mounted to the shaft of the upper pattern forming roller, a third gear coupled to the first gear, and a first driving motor for driving the third gear, and the second driving unit And a second gear mounted to the shaft of the lower pattern forming roller, a fourth gear coupled to the second gear, and a second driving motor for driving the fourth gear.

The first to fourth gears are characterized in that the helical gear.

The control unit includes a determination unit for determining whether a time difference has occurred between the rotation time measuring unit measuring the time required for each revolution of the upper and lower pattern forming rollers and the time measured from the rotation time measuring unit. As a result of determination by the determination unit, when the time difference occurs, the first and second driving units are individually controlled by correcting the rotation speed of the upper and lower pattern forming rollers to match.

According to the invention it is possible to quickly perform the marking operation for a large area by using the ink marking method,

1 is an overall perspective view of a pattern processing apparatus of a light guide plate according to the present invention;
Figure 2 is an enlarged perspective view showing a 'drawing apparatus' of the pattern processing apparatus of the light guide plate according to the present invention,
3 is a plan view showing a 'drawing apparatus' of the pattern processing apparatus of the light guide plate according to the present invention;
4 is a front view showing a 'drawing apparatus' of the pattern processing apparatus of the light guide plate according to the present invention;
5 is a perspective view showing a 'pattern forming apparatus' of the pattern processing apparatus of the light guide plate according to the present invention;
Figure 6 is a front view showing a 'pattern forming apparatus' of the pattern processing apparatus of the light guide plate according to the present invention.
7 is a process flowchart of the pattern processing apparatus of the light guide plate according to the present invention.

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

1 is an overall perspective view of a pattern processing apparatus of the light guide plate according to the present invention, Figure 2 is an enlarged perspective view showing a 'drawing apparatus' of the pattern processing apparatus of the light guide plate according to the present invention, Figure 3 is a pattern processing apparatus of the light guide plate according to the present invention 4 is a front view showing a 'drawing apparatus' of the pattern processing apparatus of the light guide plate according to the present invention, FIG. 5 is a 'pattern forming apparatus' of the pattern processing apparatus of the light guide plate according to the present invention. 6 is a front view showing a 'pattern forming apparatus' of the pattern processing apparatus of the light guide plate according to the present invention, and FIG. 7 is a process flowchart of the pattern processing apparatus of the light guide plate according to the present invention.

1 to 6, the pattern processing apparatus (A) of the individual light guide plate of the upper and lower rollers according to the present invention is to the transfer means 15 and the transfer means 15 for transferring the light guide plate 100. A drawing device (1) equipped with a thickness measuring means (2) for measuring the thickness of the light guide plate drawn in by; The upper and lower pattern forming rollers 52 and 52 ', which are mounted on the outer surface of the light guide plate 100, and the upper and lower pattern forming rollers 52 and 52', respectively, are mounted on the outer surface of the light guide plate 100 and the upper and lower pattern forming rollers 52 and 52 '. Heating means (not shown in the drawing), a pattern forming apparatus 5 having a gap adjusting means for adjusting a gap between the upper and lower pattern forming rollers 52 and 52 ', and the upper and lower pattern forming rollers ( A driving means 56 having first and second driving portions 561 and 562 for driving 52 and 52 ', respectively, and a discharge means for discharging the light guide plate 100 processed from the pattern forming apparatus 5. And a control unit (not shown) for individually controlling the first and second driving units 561 and 562 of the driving means such that the number of rotations of the drawing device 7 and the upper and lower pattern forming rollers 52 and 52 'coincide. .

The drawing device 1 is composed of a base 11 on a flat plate and a pedestal 13 coupled to an upper portion of the base 11, and the side wall 14 is spaced apart at regular intervals from the top of the pedestal 13. It is installed, the transfer means 15 is installed between the side walls (14).

The conveying means 15 includes a plurality of rotating shafts 151 mounted horizontally on the side wall 14; A plurality of feed rollers 152 respectively coupled to one end of the plurality of rotation shafts 151; It includes a drive unit 16 for rotating the rotating shaft 151.

The drive unit 16 may include a third gear 161 mounted at the other end of the rotation shaft 151; A drive shaft 162 equipped with a fourth gear coupled to the third gear 161; It includes a motor 163 for rotating the drive shaft 162, the plurality of feed rollers 152 are rotated and driven at the same time by the rotation of the motor 163.

The third gear 161 and the fourth gear is preferably a bevel gear and meshes with each other at right angles.

Therefore, when the light guide plate 100 is placed on the inlet side of the inlet device 1, the light guide plate 100 is moved in a horizontal state by the feed roller 152 of the transfer means 15 and supplied to the pattern forming apparatus 5.

And the pedestal 13 is coupled to the base 11, it is coupled to enable forward and backward movement.

That is, the guider 131 is attached to the upper part of the base 11, and the rail 132 coupled to the guider 131 is formed at the bottom of the pedestal 13.

On the other hand, the light guide plate 100 should be made uniform in thickness, but in some cases, the left and right thicknesses may be made uneven.

Thus, the light guide plate 100 having a non-uniform thickness has a closed end portion in which defective parts are generated when the upper and lower pattern forming rollers 52 and 52 'of the pattern forming apparatus 5 do not come into contact with each other.

In order to correct this, the thickness of the light guide plate 100 is measured, and when there is a left and right deviation, the light guide plate is adjusted by adjusting the left and right gaps of the upper and lower pattern forming rollers 52 and 52 'of the pattern forming apparatus 5 differently. The upper and lower pattern forming rollers 52 and 52 'may be uniformly in contact with the outer surface of the 100 to enable uniform pattern formation.

The pattern forming apparatus 5 includes bases 51 arranged in plural at regular intervals, upper and lower pattern forming rollers 52 and 52 'provided between the plurality of bases 51, and the upper and lower parts. The driving means 56 is provided in the pattern forming rollers 52 and 52 '.

That is, the driving means 56 is respectively mounted to individually control the driving of the upper pattern forming roller 52 and the lower pattern forming roller 52 'in response to a signal from the controller.

The driving means 56 includes a first gear 561-3 mounted on the shaft of the upper pattern forming roller 52, and a second gear 561-2 geared to the first gear 561-3. A first driving part 561 consisting of a mounted first driving motor 561-1; A second drive motor equipped with a third gear 562-3 mounted on the shaft of the lower pattern forming roller 52 'and a fourth gear 562-2 geared to the third gear 562-3. And a second driving part 562 composed of 562-1.

Preferably, the gear coupling of the first gear 561-3, the second gear 561-2, the third gear 562-3, and the fourth gear 562-2 is applied by a helical gear. Do.

When the transfer plates having different thermal expansion coefficients are heated, a change in diameter occurs due to the difference in expansion.

Since the transfer plate is inflated to different diameters, a difference in rotation of the upper and lower pattern forming rollers 52 and 52 'occurs, thereby passing a gap between the upper and lower pattern forming rollers 52 and 52'. While the pattern is transferred, the light guide plate 100 does not go straight but becomes closed.

To correct this, the controller determines whether a time difference has occurred between the rotation time measuring unit measuring the time required for each rotation of the upper and lower pattern forming rollers, and the time measured from the rotation time measuring unit, respectively. Contains wealth.

Therefore, when the time difference occurs, the control unit corrects the rotation speed of the upper and lower pattern forming rollers to match the first and second driving units individually.

Accordingly, the present invention controls the rotation amount of the upper and lower pattern forming rollers 52 and 52 'differently by controlling the individual driving of the first driving unit 561 and the second driving unit 562. Distortion can be prevented during insertion operation.

On the other hand, the drawing device 7 is for discharging the light guide plate 100 processed the pattern from the pattern forming apparatus 5, the bed 71 made of a flat plate, the plate coupled to the upper portion of the bed ( 72 and the vertical wall 73 is spaced apart at regular intervals on the upper portion of the plate 72, the discharge means mounted between the vertical walls (73), detecting whether the light guide plate 100 has arrived. It consists of a sensing means 76.

The discharge means is composed of a plurality of idle rollers 75 mounted in a horizontal state, a drive unit (not shown) for exerting power to rotate the plurality of idle rollers 75.

Therefore, when the light guide plate 100 reaches the exit side, the final pattern forming work is completed and the light guide plate 100 reached to the discharge position is directly transported by hand or taken out by an automated process using a robot arm. .

Hereinafter, the operation of the present invention having the above configuration will be described.

As shown in FIG. 7, the control unit may include: a step (Sa) of measuring time required for one revolution of the upper and lower pattern forming rollers 52 and 52 '; Step b (Sb) to determine whether the time difference occurred in step a; Step c (Sc) correcting the rotation speed of the upper and lower pattern forming rollers 52 and 52 'if the time difference occurs in step b; And d step Sd for driving the upper and lower pattern forming rollers 52 and 52 'at the corrected rotation speed.

On the other hand, if the time difference does not occur in the step c (Sc) includes a step c '(Sc') is performed immediately to step d.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, all such modifications and modifications being attached It is obvious that the claims belong to the claims.

1: drawing device 2: thickness measuring means
5: pattern forming apparatus 7: drawing part
15: transfer means 16: drive unit
52,52 ': upper and lower pattern forming roller 56: driving means

Claims (4)

In the pattern processing apparatus of the light guide plate of the individual drive of the upper and lower rollers that can perform the pattern marking operation on the light guide plate using the ink marking method,
A drawing device equipped with a conveying means for conveying the light guide plate and a thickness measuring means for measuring a thickness of the light guide plate drawn by the conveying means;
A transfer plate for forming a pattern on the surface of the light guide plate is mounted on an outer surface thereof, and upper and lower pattern forming rollers respectively disposed on upper and lower portions, heating means for heating the upper and lower pattern forming rollers, and gaps between the upper and lower pattern forming rollers. Pattern forming apparatus equipped with a gap adjusting means for adjusting,
A driving means provided with first and second driving parts for driving the upper and lower pattern forming rollers, respectively;
A drawing device equipped with a discharge means for discharging the light guide plate processed by the pattern from the pattern forming device;
And a controller for individually controlling the first and second driving units of the driving means so that the rotational speed of the upper and lower pattern forming rollers is matched. The method of claim 1,
The first driving unit is a first gear mounted to the shaft of the upper pattern forming roller,
A third gear coupled to the first gear and
A first driving motor for driving the third gear,
A second gear mounted to a shaft of the lower pattern forming roller;
A fourth gear coupled to the second gear and
And a second driving motor for driving the fourth gear. The method of claim 2,
The first to fourth gears are helical gears, the pattern processing apparatus of the individual light guide plate of the upper and lower rollers. The apparatus of claim 1, wherein the control unit
Rotation time measuring unit for measuring the time required per revolution of the upper and lower pattern forming roller, respectively
It includes a determination unit for determining whether a time difference between the time measured from the rotation time measurement unit,
As a result of the determination of the determination unit, when the time difference occurs, the first and second driving parts are individually controlled by correcting the rotation speed of the upper and lower pattern forming rollers so as to individually control the light guide plate of the upper and lower rollers. Processing equipment.

Images