KR101206175B1 - A apparatus for forming pattern in a Light guiding plate - Google Patents

Abstract

PURPOSE: A pattern forming apparatus is provided to improve reliability of quality while increasing productivity by forming a conical pattern having predetermined interval, length, and depth by cutter blade. CONSTITUTION: A pair of fixing units is included in a base body(2) and fixes light guide plates. A pressing unit reciprocates in order to separate or bond the pair of fixing units. A cutter unit is placed in an interval between the fixing units. The cutter unit forms a pattern on the plate side of the pair of light guide plates fixed by the pair of fixing units. The cutter unit comprises a plurality of cutter rods in which cutter blades(7) are protruded on both sides. An inspection unit detects errors of cutters of the cutter unit.

Description

A pattern for forming pattern of a light guide plate {A apparatus for forming pattern in a Light guiding plate}

The present invention provides a groove-shaped pattern that is dug inward to reflect light emitted from a light source in a light guide plate used in various liquid crystal display devices, lighting signs, mobile phones, personal digital assistants (PDAs), etc. with uniform illumination. More specifically, the light guide plate is formed, and more particularly, by forming a horn-shaped pattern having a depth set by a length set by a mechanical cutter, as well as forming two light guide plates at once, thereby increasing productivity and reliability of quality. It relates to a pattern forming apparatus of a light guide plate that can be improved.

Generally, a light guide panel used in various liquid crystal display devices, lighting signs, mobile phones, personal digital assistants (PDAs), and the like, is a kind of plate that provides a path for uniformly scattering and diffusing light from a light source.

The light incident from the light source is reflected on the plate surface of the light guide plate so as to increase the quality of the image which is reflected and emitted.

Looking at the configuration of the surface light source device to which the light guide plate is applied, as shown in Korean Patent No. 10-947264 (name: pattern forming apparatus using a laser) and a light source for emitting light, and irradiated from the light source A light guide plate for scattering and diffusing the light, a reflector positioned under the light guide plate to reflect light emitted from the light source, and a diffuser positioned at an upper surface of the light guide plate to diffuse light emitted through the light guide plate It consists of a plate and a prism sheet positioned above the diffuser plate to align the light diffused by the diffuser plate to emit to the outside.

The light guide plate is made of glass or acrylic, and a groove-shaped pattern is formed on a surface of the light guide plate to receive, scatter, and diffuse light emitted from a light source to emit light with uniform illuminance over the entire area.

In other words, the light incident through the pattern is diffused to obtain uniform illuminance.

Forming a pattern on such a light guide plate is an important factor for determining the quality of a product, and conventionally, a pattern of a shape set on the surface of the light guide plate is formed by irradiating a laser onto the light guide plate as disclosed in the publication.

That is, a groove-shaped pattern is formed on the surface of the light guide plate by the heat of the incident laser.

Of course, there is a method of forming a scratch pattern on the surface of the light guide plate by using a furniture cutter (a cutter having a high strength blade) rather than a laser, but many patterns (about 45-500,000 patterns are formed on one light guide plate). ) Is very time consuming and difficult to form at precise intervals and lengths and depths, and is rarely used.

Accordingly, most of the apparatuses and methods for forming a pattern on a light guide plate using a laser, and the apparatus and method for forming a pattern using a laser, as shown in the above publication by irradiating the laser in the form set through the control of the control unit To form.

However, the method of forming a pattern using a laser on the surface of the light guide plate as described above has the following problems.

First, the inside of the pattern formed on the surface of the light guide plate by the laser has a fused irregular shape, and the depth of the pattern is not formed according to the setting, and the surface is irregular, so that the image is not uniform when diffusing light. There was an unclear problem.

Second, since a pattern is formed using a small number of lasers, there is a problem in that the productivity of the pattern is long due to a long pattern formation time.

Third, there was a problem in that a horn (cone, square (pyramid)) groove formed in an ideal shape on the surface of the light guide plate could not be formed.

Fourth, only one light guide plate can be molded at a time, there is a problem that the productivity is lowered because it is not suitable for mass production.

The present invention has been proposed to solve the above conventional problems, an object of the present invention is to form a horn-shaped pattern having a depth set by the length set by the interval set by the mechanical cutter as well as two light guide plate at a time The present invention provides a pattern forming apparatus for a light guide plate capable of increasing productivity and improving reliability of quality by molding.

The pattern forming apparatus of the light guide plate of the present invention for achieving the object of the present invention as described above is provided on a transport path that is conveyed with a pair of light guide plates having a separation distance to form a groove-shaped pattern on the plate surface of the light guide plate In configuring the pattern forming apparatus of; A pair of fixing means configured to fix the gas to be entered and discharged while the pair of light guide plates conveyed on the conveying path have a distance from each other, and the light guide plates provided to the gas to enter and discharge the gas; Pressing means for reciprocating the fixing means close to each other and spaced apart from each other, and a plurality of cutter blades protruding to both sides to form a groove in the plate surface of the light guide plate which is located in the space between the fixing means and fixed to the adjacent fixing means It characterized in that it comprises a cutter means having a cutter rod.

The gas may further include a meter reading means for detecting the abnormality of the cutter blades of the cutter means.

In addition, the fixing means is characterized in that the body is formed with a fixing groove to which the light guide plate is fixed, and an elastic member provided in the fixing groove to apply elasticity to the light guide plate.

And the elastic member is characterized in that made of an elastic body.

In addition, the fixing means is characterized in that the vibration means for transmitting vibration to the body is added.

And the vibration means is characterized in that consisting of a vibrator is converted to the vibration energy by applying electric energy.

In addition, the pressurizing means is provided on the base and screwed to one end of the fixing means and the screw rods are symmetrically oriented around the cutter means so that the fixing means is close to and spaced apart when rotating, and the screw rod It is characterized by consisting of a motor to apply a rotational force.

And the cutter means is fixed to the rod-shaped cutter rod provided with an end of the horn-shaped cutter blade to the end of the horn-shaped groove that is gradually narrower as the inner diameter of the light guide plate, and fixed to the fixed rod provided in the base The cutter blade of the cutter rod is exposed to the outside, characterized in that made of a fixed body having a plurality of through holes for fixing so as to move freely.

In addition, the meter reading means is a detection member having a contactor which is located in the lower portion of the conveying path of the light guide plate in the gas phase and in contact with the end of the cutter blade of the cutter means to make an electrical connection, and close the detection member to the cutter means; Characterized in that the transfer means to be spaced apart.

The conveying means includes a vertical reciprocating member for vertically reciprocating the detecting member to a height at which the cutter means is located, and a horizontally moving detection fixing plate on which the detecting member is fixed by lifting and lowering by the vertical reciprocating member. It characterized in that the horizontal reciprocating member made to close and space so that the contact of the detection member and the cutter blade of the cutter means contact.

In addition, the vertical reciprocating member is characterized in that consisting of a multi-stage cylinder.

In addition, the horizontal reciprocating member is made of a horizontal cylinder having a cylinder rod fixed to the detection fixing plate is characterized in that the detection fixing plate is driven to be approached and spaced at the same time.

The pattern forming apparatus of the light guide plate of the present invention made as described above is a gap set by the cutter blades by simultaneously approaching and spaced between the cutter means configured to project a plurality of cutter blades, which are mechanical cutters, and the pair of light guide plates toward the cutter means. By forming a horn-shaped pattern having a depth set by the length set as, it has the effect of increasing productivity while improving the reliability of the quality.

That is, the pattern can be formed by adjusting the depth and spacing according to the characteristics of each local part of the light guide plate, so that the quality of the product is remarkably improved.

1 to 5 is a schematic illustration showing the pattern formation principle of the pattern forming apparatus of the light guide plate according to the present invention.
6 to 8 is a schematic illustration showing a pattern forming apparatus of a light guide plate according to an embodiment of the present invention.
9 to 10 is a schematic illustration showing a pattern forming apparatus of a light guide plate according to another embodiment of the present invention.
11 and 12 are schematic illustration showing a pattern forming apparatus of a light guide plate according to another embodiment according to the present invention.
Figure 13 is a schematic illustration showing a pattern forming apparatus of a light guide plate according to another embodiment of the present invention.
14 and 15 are schematic illustration showing a pattern of a light guide plate molded by the embodiments of the present invention.

Hereinafter, a pattern forming apparatus for a light guide plate according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

6 to 10 is a view showing a pattern forming apparatus of a light guide plate according to an embodiment of the present invention, the pattern forming apparatus of the light guide plate of the present embodiment is a pair of light guide plate (1) is transported while having a separation distance It is provided on the furnace to form a groove-shaped pattern on the plate surface of the light guide plate (1).

That is, the light guide plates 1 are conveyed upright in the direction in which the plate surfaces face each other on the conveyance path, and the entire pattern groove is simultaneously formed in the plate surface of the light guide plate 1 facing in the state where the plate surfaces are vertically upright.

Such a pattern forming apparatus of this embodiment forms a pattern on a plate surface by applying an operation of simultaneously approaching and separating a pair of light guide plates 1 facing each other on a transport path as shown in FIGS. 1 to 6. .

Accordingly, the pattern forming apparatus of the present embodiment has a gas 2 that enters and discharges while the pair of light guide plates 1 transported on the transport path have a distance from each other.

The base 2 is provided with a pair of fixing means for fixing the light guide plates 1 entering and exiting the base 2, respectively.

In other words, the light guide plate 1 transferred to the base 2 is squeezed onto the fixing means by a separate attaching and detaching device, not shown, and retransmitted through the molding process.

The fixing means includes a body 4 having a fixing groove 3 to which the light guide plate 1 is fixed, and an elastic member 5 provided in the fixing groove 3 to apply elasticity to the light guide plate 1. Is made of.

That is, the light guide plate 1 is inserted into and fixed to the fixing groove 3 of the body 4 by the detachable device, and when the pattern molding operation is completed, the light guide plate 1 is removed from the fixing groove 3 and then reinserted into the transportation path. Is transported to the place.

In addition, the light guide plate 1 is elastic with respect to the pressing force of the front by the elastic member 5 provided in the fixing groove (3).

And the elastic member 5 is most preferably made of an elastic body having its own elasticity.

In addition, the fixing means is added with a vibration means for transmitting vibration to the body (4) as shown in FIG.

That is, vibration is added to the light guide plate 1 and the light guide plate 1 vibrates as necessary.

In the above, the vibration means is most preferably made of a vibrator (6) to receive electrical energy to convert to vibration energy.

In the pattern forming apparatus of this embodiment, a plurality of cutter rods protruding from both sides of the cutter blades 7 formed to form grooves in the plate surface of the light guide plate 1 fixed to the fixing means adjacent to each other in the space between the fixing means. Cutter means having 8 is located.

The cutter means has a rod-shaped cutter rod 8 having an horn-shaped cutter blade 7 formed at an end thereof so as to stamp an horn-shaped groove that gradually deepens in the light guide plate 1. Fixing body 11 is fixed to the fixing rod (9) provided in (1) having a plurality of through holes (10) to be fixed so that the cutter blade (7) of the cutter rod (8) is exposed to the outside freely )

Accordingly, as shown in FIGS. 1 to 6, the cutter blade 7 penetrates into the plate surface of the light guide plate 1 that is pressed toward the fixing body 11 to process the groove.

In other words, the horn-shaped groove is carved.

As a result, the deeper and deeper the cutter blade (7) can form a pattern consisting of a groove of the horn shape that the inner diameter is gradually narrowed, it is uniformly scattered to obtain a uniform roughness to ensure the reliability of the quality Can be improved.

In this case, by adjusting the distance between the cutter rod 8 fixed to the fixing body 11 and the light guide plate 1, the depth of the groove to be imprinted may be adjusted.

Of course, if the length of each cutter rod 8 is adjusted, the depth of the grooves imprinted on the light guide plate 1 may be adjusted to form grooves at different depths.

In addition, the light guide plates 1 may be formed by pressing the light guide plates 1 at both sides of the fixing body 11, thereby simultaneously forming the entire pattern on the two light guide plates 1 in one operation. Advantageously, productivity is increased.

In addition, in the pattern forming apparatus of the present embodiment, a pressing means for reciprocating the fixing means so as to be close to and spaced from each other is further provided.

The pressurization means is provided in the base (2), one end of the fixing means is screwed and the screw rod 12 is made so that the fixing means is close and spaced apart when the rotation of the screw symmetrically around the cutter means And, it consists of a motor 13 to apply a rotational force to the screw rod (12).

Therefore, according to the implementation of the forward and reverse rotation of the motor 13, the direction of rotation of the screw rod 12 is determined so that the fixing means screwed with the screw rod 12 are simultaneously approached or spaced apart by the cutter means to form a pattern.

And the fixing means are guided by the fixing rod (9) is configured to facilitate the reciprocating motion according to the screw coupling.

Further, in the pattern forming apparatus of the present embodiment, the base 2 further includes a metering means for detecting the abnormality of the cutter blades 7 of the cutter means.

Therefore, by detecting the loss caused by the wear of the cutter blades 7 forming the pattern on the plate surface of the light guide plate 1 and determining the judgment on repair and replacement based on accurate data, maintenance is stable and defects are generated. Degrades.

That is, the reliability of the product is significantly improved.

And the reading means is a detection member having an unshown contactor which is located in the lower portion of the transfer path of the light guide plate 1 on the base 2 and in contact with the end of the cutter blade (7) of the cutter means for electrical connection 14, and a conveying means for bringing the detecting member 14 close to and away from the cutter means.

Accordingly, after the pattern formation of the light guide plate 1 is completed as shown in FIGS. 9 and 10, when the cutter means 7 is brought close to the cutter means by contact with the cutter blade 7 and the contacts, electrical exchange occurs. By detecting and calculating an electrical signal of electrical alternating current, it is possible to determine whether the cutter blade 7 is damaged.

In other words, by checking the actual state of the cutter blades 7 can be maintained by the maintenance and replacement, the failure is reduced.

In the above, the detection member 14 is most preferably made of a PCB substrate.

In addition, in the pattern forming apparatus of the present embodiment, the conveying means is moved by the vertical reciprocating member 15 and the vertical reciprocating member 15 which vertically reciprocate the detection member 14 to the height at which the cutter means is located. The detection fixing plate 16 which is lowered and the detection member 14 is fixed is moved horizontally toward the detection member 14 so that the contact of the detection member 14 and the cutter blade 7 of the cutter means come into close contact and are separated from each other. Made of a horizontal reciprocating member 17.

In the vertical reciprocating member 15 is preferably made of a multi-stage cylinder as shown in Figures 11 and 12, the horizontal reciprocating member 17 is a horizontal having a cylinder rod fixed to the detection fixing plate 16 It is most preferable that the detection fixing plate 16 is made of a cylinder and driven so as to be close to and spaced apart at the same time.

Therefore, the detection member 14 of the meter reading means can read and detect and maintain the state of the cutter blade 7 at set cycles as necessary.

Referring to the effect of the pattern forming apparatus of the light guide plate of the fourth embodiment made as described above in detail as follows.

First, when a pair of light guide plates 1 enter the gas 2 by a transport path in which the plate surfaces are erected to face each other (in this case, the fixing means by the pressing means are kept spaced apart from each other in the cutter means). The light guide plate 1 is inserted into and fixed to the fixing groove 3 of the body 4 constituting the fixing means on the transport path through a separate detachment apparatus (not shown).

As described above, when each of the light guide plates 1 is fixed to the body 4, the motor 13 constituting the pressing means is driven to rotate the screw rod 12, and accordingly the body 4 to which the light guide plates 1 are fixed. Is approached toward the cutter means side, and the cutter blade 7 finally penetrates the plate surface of the light guide plate 1 to form a pattern.

At this time, the shape (depth, size, spacing, etc.) of the grooves constituting the molded pattern according to the size and position of the cutter blade 7 is formed different from each other.

The vibration means is driven while the pattern is formed on the light guide plate 1 to apply vibration energy to the light guide plate 1, thereby smoothly forming the grooves formed by the cutter blade 7.

As described above, when the pattern is molded by the pressing means toward the cutter blade 7, the motor 13 is reversely rotated and the body 4 is moved away from the cutter means as the screw rod 12 is reversely rotated.

As such, when the pattern is formed on the plate surface of the light guide plate 1 and the light guide plates 1 are spaced apart from the cutter means, the light guide plates 1 are removed from the fixing groove 3 of the body 4 by the detachment apparatus, not shown. After reentering on the transport path located on the side, it is transported to a separate place.

When the light guide plate 1 is separated from the fixing means as described above, the vertical reciprocating member 15 of the metering means raises the horizontal reciprocating member 17 on which the detection member 14 is fixed, thereby detecting the detection member 14 and the cutter blade ( 7) the horizontal reciprocating member 17 is moved and the detection member 14 fixed to the detection fixing plate 16 is brought closer to the cutter blade 7 side, and finally the cutter blade 7 and the detection member are aligned. The contactor of (14) is brought into contact with each other to generate electrical alternating current.

Accordingly, the detected electrical alternating current is calculated based on the set data to read whether the cutter blade 7 is damaged and output to an output device (recording paper, monitor, etc.), not shown, to be recognized by the operator.

That is to repair and replace the damaged cutter blade (7)

After detecting whether the cutter blade 7 is damaged by the detection member 14 as described above, the horizontal reciprocating member 17 is reversely driven to separate the detection member 14 from the cutter blade 7 and then to the vertical reciprocating. The operation is completed by reversely driving the member 15 to return the detection member 14 to its original position and to maintain the standby state until the next detection operation.

When the steps as described above are sequentially applied, the operation of forming the pattern on the other light guide plates 1 is repeated continuously.

1: light guide plate, 2: gas,
3: fixing groove, 4: body,
5: elastic member, 6: vibrator,
7: cutter blade, 8: cutter rod,
9: fixed rod, 10: through hole.
11: fixed body, 12: screw rod,
13: motor, 14 detection member,
15: vertical reciprocating member, 16: detection plate,
17: horizontal reciprocating member.

Claims (12)

In the configuration of the pattern forming apparatus of the light guide plate is provided on the conveying path to be conveyed with a pair of light guide plate having a separation distance to form a groove-shaped pattern on the plate surface of the light guide plate;
A pair of gas guided and discharged while the pair of light guide plates transferred on the transfer path have a distance from each other;
A pair of fixing means provided in the base to fix the light guide plates entering and exiting the base, respectively;
Pressing means for reciprocating the fixing means to be close to and spaced from each other,
Light guide plate, characterized in that it comprises a cutter means having a plurality of cutter rods protruding to both sides of the cutter blade is formed in the plate surface of the light guide plate which is located in the space between the fixing means adjacent to each other fixed means; Pattern forming apparatus
The method of claim 1, further comprising:
The substrate is formed with a pattern forming apparatus of the light guide plate, characterized in that further provided with a metering means for detecting the abnormality of the cutters of the cutter means.
The method of claim 1, further comprising:
The fixing means includes a body having a fixing groove to which the light guide plate is fixed, and an elastic member provided in the fixing groove and adapted to apply elasticity to the light guide plate.
4. The method of claim 3, further comprising:
The elastic member is a pattern forming apparatus of the light guide plate, characterized in that made of an elastic body.
4. The method of claim 3, further comprising:
The fixing means is a pattern forming apparatus of the light guide plate, characterized in that the vibration means for transmitting vibration to the body is added.
The method of claim 5;
The vibrating means is a pattern forming apparatus of the light guide plate, characterized in that made of a vibrator to be converted into vibration energy by applying electric energy.
The method of claim 1, further comprising:
The pressurizing means is provided on the base, and one end of the fixing means is screwed, and the screw rod is symmetrically oriented about the cutter means so that the fixing means is close to and spaced apart during rotation, and a rotational force on the screw rod. The light guide plate pattern forming apparatus, characterized in that made of a motor to apply
The method of claim 1, further comprising:
The cutter means is fixed to the rod-shaped cutter rod provided with an end of the horn-shaped cutter blade is formed at the end of the horn-shaped cutter blade is to be engraved as the inner diameter of the light guide plate is gradually narrowed, the fixed rod provided in the base and the cutter Light guide plate pattern forming apparatus, characterized in that the cutter blade of the rod is exposed to the outside and made of a fixed body having a plurality of through holes fixed to move freely
3. The method of claim 2,
The metering means is located below the conveying path of the light guide plate in the gas phase and has a detecting member having contacts for making electrical connection by contacting an end of the cutter blade of the cutter means. Pattern forming apparatus of the light guide plate, characterized in that consisting of a conveying means to
The method of claim 9;
The conveying means includes a vertical reciprocating member for vertically reciprocating the detecting member to a height at which the cutter means is located, and a horizontally moving detection fixing plate which is lifted and lowered by the vertical reciprocating member and fixed to the detecting member. The pattern forming apparatus of the light guide plate, characterized in that the horizontal reciprocating member is made to be close and spaced so as to contact the contact of the detection member and the cutter blade of the cutter means.
The method of claim 10;
The vertical reciprocating member is a light guide plate pattern forming apparatus, characterized in that consisting of a multi-stage cylinder
The method of claim 10;
The horizontal reciprocating member is formed of a horizontal cylinder having a cylinder rod to which the detection fixing plate is fixed, and the pattern forming apparatus of the light guide plate is driven such that the detection fixing plate is simultaneously approached and spaced apart.

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