KR101335404B1 - Apparatus for manufacturing pattern on a light guide plate - Google Patents

Abstract

The present invention relates to a light guide plate processing apparatus, comprising: a laser generating unit for generating a laser beam; A diffraction grating holder part having a DOE (diffractive optical element) lens for passing and dividing a laser beam generated by the laser generation part; And a focus lens holder having a focus lens disposed under the diffraction grating holder part, wherein the diffraction grating holder part includes a plurality of diffraction gratings having different number of splitting beams, The plurality of diffraction gratings are selectively movable to a light transmitting position, a position through which the laser beam can pass.

Description

Light guide plate processing equipment {Apparatus for manufacturing pattern on a light guide plate}

The present invention relates to a light guide plate processing apparatus, and more particularly, includes a diffraction grating capable of reflecting and spectroscopy a laser beam, and spectroscopically plural single parallel light to irradiate the light guide plate to be processed to process the pattern portion. And a light guide plate processing apparatus.

The light guide plate processing apparatus is a device for processing various patterns on the light guide plate. The light guide plate is used as a main component of a back light unit provided in a liquid crystal display (LCD) used for a television, a computer monitor or the like as a surface light source device.

The light guide plate has a flat plate shape and is usually made of a plastic material such as transparent acrylic or the like. The light guide plate uniformly transmits the light generated from the light source to the entire surface of the liquid crystal (LCD panel). In order to perform such a role, the light guide plate is provided with a pattern having a predetermined shape on one side thereof so as to scatter light generated from the light source.

The shape of the pattern may vary, such as a prism pattern, a checkerboard pattern, a polygonal pattern, a star pattern, a dot pattern, and a bar pattern. The various forms of the pattern on the surface of the light guide plate include a printing method and a cutting method for forming a V-notch, but at present, laser beams are used due to various advantages. The method is mainly used.

The present invention relates to a light guide plate processing apparatus for processing a pattern on a light guide plate using a laser beam. In the conventional light guide plate processing apparatus using a laser beam, the laser beam generated by the laser generating unit is reflected to the mirror unit, and then irradiated to the workpiece light guide plate fixed to the table through a header unit for linear movement to process the pattern.

A conventional light guide plate processing apparatus 100 is conceptually illustrated in FIG. 1.

The light guide plate processing apparatus 100 includes a laser generating unit 110 for generating a laser beam, an expander 120 for diffusing the laser beam to a predetermined diameter, a mirror 130 for reflecting the laser beam, and a laser. And a focus lens 140 for passing the beam. The laser beam passing through the focus lens 140 is irradiated onto the light guide plate (not shown) to process the pattern.

However, these conventional light guide plate processing apparatuses do not effectively use the laser beam generated by the laser generating unit, and thus there is a problem that it is insufficient to process a pattern having various shapes and arrangements quickly. .

Patent Registration No. 10-1088354

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems, and provides a light guide plate factory value capable of processing a light guide plate according to various needs by having a diffraction grating that can be split while reflecting a beam. The purpose.

Another object of the present invention is to provide a light guide plate factory value capable of processing the light guide plate to be processed according to various needs by selecting an appropriate diffraction grating as needed, when a plurality of diffraction gratings having different numbers of laser beams are provided. The purpose.

It is still another object of the present invention to provide a light guide plate factory value capable of processing a light guide plate to be processed according to various needs by selecting an appropriate focus lens as needed, when a plurality of focus lenses having different focal lengths are provided. For the purpose of

Light guide plate processing apparatus of the present invention, the laser generating unit for generating a laser beam; A diffraction grating holder portion for reflecting the laser beam generated by the laser generation unit and having a diffraction grating for dividing the laser beam; And a focus lens holder having a focus lens for passing the divided laser beam reflected from the diffraction grating holder and irradiating the light guide plate to be processed.

On the other hand, the diffraction grating holder portion is provided with a plurality of diffraction gratings, each diffraction grating is provided so that the number of division of the mutual beams are different, the plurality of diffraction gratings is a position that can selectively reflect the laser beam It is preferable to be movable to the reflection position.

The diffraction grating holder portion includes a disc-shaped diffraction grating mounting body, wherein the plurality of diffraction grating mounting bodies are arranged to be spaced apart from each other along a circumference, and the diffraction grating mounting body is configured as the plurality of diffraction grating mounting bodies. Preferably, the diffraction gratings are configured to be rotatable such that each of the two diffraction gratings can be selectively positioned at the reflection position.

On the other hand, the diffraction grating holder portion includes a plate-shaped diffraction grating mounting plate, wherein the plurality of diffraction grating mounting plates are arranged to be spaced apart from each other along a straight line, and the diffraction grating mounting plate includes: It is preferable that the diffraction grating is configured to be linearly movable so that the diffraction grating can be selectively positioned at the reflection position.

The focus lens holder may include a plurality of focus lenses having different focal lengths, and the plurality of focus lenses may be selectively moved to a light transmitting position, each of which may selectively pass through the laser beam.

The focus lens holder includes a disk-shaped focus lens mounting body, wherein the plurality of focus lenses are spaced apart from each other along a circumference, and the focus lens mounting body includes the plurality of focus lens mounting bodies. Preferably, three focus lenses are rotatably configured to be selectively positioned at the projection positions.

The focus lens holder may include a plate-shaped focus lens mounting plate, and the plurality of focus lenses may be spaced apart from each other along a straight line on the focus lens mounting plate, and the focus lens mounting plate may include the plurality of focus lens mounting plates. It is preferable that the lens is configured to be linearly movable so that the focus lens can be selectively positioned at each of the projection positions.

On the other hand, the focus lens holder is preferably configured to be movable in a direction away from or close to the diffraction grating holder.

On the other hand, it is preferable to further include an expander disposed on the path of the laser beam between the laser generating portion and the diffraction grating holder portion to enlarge the laser beam generated in the laser generating portion to a predetermined diameter. .

According to the light guide plate processing apparatus of the present invention, a diffraction grating (DOE) lens capable of reflecting and dividing a beam can be provided to obtain an effect of processing various patterns on the light guide plate to be processed.

Further, according to the light guide plate processing apparatus of the present invention, it is possible to obtain the effect that the light guide plate can be processed by spectroscopy of the laser beam into a plurality of laser beams having various numbers and intervals desired.

1 is a schematic conceptual view for explaining a part of a conventional light guide plate processing apparatus;
Figure 2 is a schematic conceptual diagram for explaining the configuration of a light guide plate processing apparatus of one embodiment according to the present invention,
3 is a conceptual diagram for explaining the operation of the diffraction grating of FIG.
4 is a schematic conceptual view for explaining a light guide plate processing apparatus according to another embodiment of the present invention;
5 is a plan view of the diffraction grating holder part of FIG. 4;
6 is a schematic conceptual view for explaining a light guide plate processing apparatus of still another embodiment according to the present invention;
7 is a plan view of the diffraction grating holder part of FIG. 6;

2 and 3, a light guide plate processing apparatus of an embodiment according to the present invention will be described in detail.

The light guide plate processing apparatus 1 according to the embodiment of the present invention is a device for irradiating a laser beam generated by the laser generating unit 10 to one side surface of a material light guide plate, and processing a pattern portion having a desired shape by engraving.

On the other hand, the light guide plate processing apparatus 1 of this embodiment is comprised including the general structure which a normal light guide plate processing apparatus has. Although not shown in the drawings, a general configuration includes a frame on which components are mounted and supported, a table portion on which a light guide plate to be mounted is fixed, and the like.

The general configuration of the conventional light guide plate processing apparatus will not be described. However, the light guide plate processing apparatus of the present invention does not exclude the unexplained configurations, and the light guide plate processing apparatus may be appropriately employed by adopting the necessary configuration among the unexplained configurations. The construction is possible by those skilled in the art.

2, the light guide plate processing apparatus 1 of this embodiment is conceptually shown mainly on the characteristic structure. Therefore, in the case of actually implementing the processing apparatus, the specific shape may be variously modified as long as each component performs the same role of the configuration.

The light guide plate processing apparatus 1 is comprised including the laser generation part 10, the diffraction grating holder part 30, and the focus lens holder part 50. As shown in FIG.

The laser generator 10 is a device for outputting a laser beam. The laser generation unit 10 is connected to a control unit provided on one side of the device, and the intensity or generation period of the laser beam outputted under the control of the control unit is adjusted.

The diffraction grating holder part 30 reflects the laser beam generated from the laser generating part 10 so that the laser beam reaches the focus lens holder part 50. The diffraction grating holder part 30 is provided with a diffraction grating which reflects the laser beam generated by the laser generation part 10 and divides the laser beam.

The shape of the grating formed on the diffraction grating provided in the diffraction grating holder part 30, that is, the distance between the gratings, the shape of the cross section, or the like can be variously modified as necessary. Depending on the spacing or specific shape of the gratings formed on the diffraction grating, the number of reflected laser beams to be divided and at what interval are determined, and thus, an appropriate diffraction grating is selected as necessary.

The focus lens holder unit 50 includes a focus lens that passes through a laser beam reflected from the diffraction grating and irradiates the light guide plate to be processed.

The laser beam split by the diffraction grating passes through the focus lens and the focal length is adjusted, and then irradiated to the workpiece light guide plate 200 positioned below.

In the case of the present embodiment, the focus lens holder 50 is configured to be movable in a direction away from or close to the diffraction grating holder 30. In other words, the focus lens holder 50 may be configured to move so as to move away from or close to the light guide plate.

On the other hand, the light guide plate processing apparatus 1 of this embodiment further includes an expander 20 (expander). The expander 20 is disposed on a laser beam propagation path between the laser generation unit 10 and the diffraction grating holder unit 30 to enlarge the laser beam generated by the laser generation unit 10 to a predetermined diameter. Do it.

According to the light guide plate processing apparatus 1 of this embodiment, it has the following effect.

The laser beam generated by the laser generator 10 is reflected on the diffraction grating and split into a desired number of beams. The split laser beams pass through a focus lens and are irradiated onto the light guide plate to process a desired pattern. That is, the laser beam split according to the properties of the diffraction grating is irradiated to the light guide plate after passing through the focus lens.

Then, by adjusting the position of the focus lens holder 50 in the vertical direction, the interval of the divided laser beam can be adjusted. In addition, it is also possible to adjust the size of the spot (spot) of the laser beam to be irradiated according to the positioning of the focus lens.

Referring to FIG. 3, the laser beam 11, which is exaggerated and conceptually displayed, is reflected and divided by the diffraction grating provided in the diffraction grating holder part 30. The split laser beam is adjusted while passing through the focus lens provided in the focus lens holder 50, is irradiated to the light guide plate 200, and the processed light guide plate is processed.

At this time, while the focus lens holder unit 50 moves up and down, it is possible to adjust the interval of each divided laser beam or the size of each focus point.

The light guide plate processing apparatus of this embodiment has an advantage that it is possible to irradiate the processed light guide plate by dividing the laser beam with a diffraction grating.

In addition, according to the present embodiment, by adjusting the height of the focus lens holder, it is possible to adjust the spacing of the divided laser beams, and there is an advantage that it is possible to adjust the size of each focus.

That is, according to the light guide plate processing apparatus of the present embodiment, it is possible to quickly process the laser beam divided by the diffraction grating, and to process various patterns.

4 and 5 illustrate a light guide plate processing apparatus 1a according to another embodiment of the present invention.

In the light guide plate processing apparatus 1 of the present embodiment, the number of diffraction gratings provided in the diffraction grating holder part 30 is plural, and the focus lens provided in the focus lens holder part 50 is plural compared with the previous embodiment. Is that. However, according to the exemplary embodiment, only the number of diffraction gratings included in the diffraction grating holder part 30 may be plural, or only the number of focus lenses provided in the focus lens holder part 50 may be plural.

Description of the configuration that has not been described, the description of the previous embodiment is applied as it is if appropriate modified.

The light guide plate processing apparatus 1 of this embodiment includes a laser generating unit 10, an expander 20, a diffraction grating holder unit 30, and a focus lens holder unit 50.

The diffraction grating holder portion 30 includes a diffraction grating mounting body 32. The diffraction grating mounting body 32 includes a plurality of diffraction gratings. In this case, the plurality of diffraction gratings provided have different numbers of divisions for reflecting and dividing a beam.

Each diffraction grating reflects and diffracts a laser beam, a single parallel beam, into a plurality of beams. A single laser beam is reflected on the diffraction grating and is split into two, three or more beams. Each diffraction grating has a unique number of divisions of how many beams are divided according to their characteristics. In addition, depending on the diffraction grating, even if the number of divisions is the same, the properties of the divided spectral beams, that is, the distance between the divided spectra may be different.

In the present embodiment, the diffraction grating holder portion 30 is provided with four diffraction gratings (32.34.36.38). The number of divisions of each diffraction grating is different. However, according to the exemplary embodiment, the number of diffraction gratings and the number of divisions of the diffraction gratings provided in the diffraction grating holder part 30 may be variously modified as necessary. In addition, the diffraction grating does not have to be circular, and if necessary, it may be a polygon such as a square.

The plurality of diffraction gratings provided in the diffraction grating holder part 30 are configured to be selectively movable to a 'reflection position' that can reflect the laser beam. That is, according to the needs and control of the user, any one of a plurality of diffractive elements having different beam splitting numbers can be moved to a 'reflection position', which is a position where the desired diffractive element can reflect the laser beam.

In this embodiment, the diffraction grating holder portion 30 includes a disc-shaped diffraction grating mounting body 31. In the diffraction gap mounting body 31, a plurality of diffraction gratings 32, 34, 36, 38 are arranged to be spaced apart from each other along the circumference. The intervals spaced apart from each other may be equal intervals, or may not be equal intervals as necessary.

The diffraction grating mounting body 31 is configured to be rotatable so that each of the plurality of diffraction gratings 32, 34, 36, 38 can be selectively positioned at the reflection position, respectively. The diffraction grating mounting body 51 is provided with all four diffraction grating mounting parts. A diffraction grating is provided in each diffraction grating mounting portion.

According to the embodiment, the specific shape of the diffraction grating mounting body may be variously modified. That is, not only the disk shape but also an elliptical shape or a shape such as a playground track can be variously modified. Specific technical configuration for rotating the diffraction grating mounting body is implemented using a known technique.

The focus lens holder part 50 is disposed below the diffraction grating holder part and includes a focus lens. In the present exemplary embodiment, the focus lens holder unit 50 includes four focus lenses. Since the shape is the same as the shape of the diffraction grating holder part 30 shown in FIG. 5, it abbreviate | omits.

The four focus lenses have different focal lengths. Among the plurality of focus lenses, any one of the focus lenses having a focal length suitable for processing is configured to be movable to a 'transmission position' which is a position through which the laser beam can pass.

On the other hand, the focus lens holder 50 is configured to include a disk-shaped focus lens mounting body. The focus lens mounting body 51 is provided with four focus lens mounting portions. Each focus lens mounting portion is provided with a focus lens. Each of the focus lenses is spaced apart from each other along the circumference.

In addition, the focus lens mounting body 51 is configured to be rotatable, similarly to the diffraction grating mounting body 31, so that any one of the plurality of focus lenses can be selectively positioned in the projection position.

Therefore, the user can select a focus lens having a desired focal length among the four focus lenses and bring the laser beam split by the diffraction grating onto the light guide plate at a desired interval and focus size. Make sure Also in this embodiment, the focus lens holder 50 is configured to be movable in the vertical direction.

Referring to FIG. 4, as shown by the arrow, it can be seen that the diffraction grating holder part 30 and the focus lens holder part 50 are rotatable, and that the focus lens holder part 50 is movable in the vertical direction. have.

Due to this configuration, it is possible to adjust the distance between the diffraction grating and the focus lens and the distance from the focus lens to the workpiece light guide plate as desired, so that not only the interval of the divided laser beams irradiated to the workpiece light guide plate, but also if necessary It is also possible to adjust the focal size of the irradiated laser beam.

Hereinafter, the operation and effect of the light guide plate processing apparatus 1a having the above-described configuration will be described.

According to the shape and shape of the pattern to be processed on the light guide plate to be processed, an appropriate diffraction grating and a focus lens are selected and placed at the reflection position and the projection position, respectively. At this time, the diffraction grating holder 30 and the focus lens holder 50 may be rotated, and the desired diffraction grating and the focus lens may be positioned at the reflection position and the projection position, respectively.

The laser beam generated by the laser generator 10 is reflected on the selected diffraction grating and split into a desired number of beams. The split laser beams pass through the selected focus lens and are irradiated onto the light guide plate to process a desired pattern. do. That is, the number of divisions of the laser beam is selected according to the properties of the selected diffraction grating, and the focal length is determined according to the selected focus lens.

Then, by adjusting the position of the focus lens holder 50 in the vertical direction, the interval of the divided laser beam can be adjusted. In addition, it is possible to adjust the size of the spot (spot) of the laser beam to be irradiated in accordance with the selection and position of the focus lens.

In the case where the size of the light guide plate to be processed or the shape of the pattern to be processed is different, it is difficult to cope conventionally. However, the light guide plate processing apparatus according to the present invention responds by selecting a desired diffraction grating and a focus lens and adjusting a gap therebetween. The advantage is that it is possible.

That is, the light guide plate processing apparatus according to the present invention has the advantage that the size of the light guide plate to be processed can be changed or corresponding to various patterns to be processed without having various kinds of expensive equipment. In addition, there is an advantage that the rapid processing by the laser beam divided by the diffraction grating is possible.

6 and 7 conceptually illustrate a light guide plate processing apparatus 1b according to another embodiment of the present invention.

In the present embodiment, the diffraction grating holder portion 30a includes a diffraction grating mounting plate 31a. Three diffraction gratings 52a and 54a are spaced apart from each other along a straight line in the diffraction grating mounting plate 31a. On the other hand, in another embodiment, the provided diffraction grating may be provided in number of two, four or more.

The diffraction grating mounting plate 31a is configured to be linearly movable so that any one diffraction grating having a desired division number among the plurality of diffraction gratings can be positioned at the reflection position.

The focus lens holder 50a has the same shape as the diffraction grating mounting portion 30a illustrated in FIG. 7 and includes a plate-shaped focus lens mounting plate. On the focus lens mounting plate, three provided focus lenses are spaced apart from each other along a straight line. The focus lens mounting plate is configured to be linearly movable so that a focus lens having a desired focal length among the three focus lenses can be positioned at a light transmitting position.

In the present embodiment, since the diffraction grating holder portion 30a and the focus lens holder portion 50a have a rectangular cross section and are provided with a plurality of lenses along the longitudinal direction, the diffraction grating holder portion 30a and the focus lens are provided. The space occupied by the holder portion 50a is relatively small compared with the first embodiment.

However, since the diffraction grating holder portion 30a and the focus lens holder portion 50a are each provided with a plurality of diffraction gratings and focus lenses, the operation and effect obtainable therefrom are properly modified as described with respect to the first embodiment. Since it may be applied, it is omitted.

On the other hand, in the present embodiment, the focus lens holder portion 50b is not a plate shape, but may be a rotatable disk shape of the previous embodiment, and also in the case of the previous embodiment, the focus lens holder portion 50b is not a disk shape. It may also be a linearly movable plate shape.

1 ... LGP processing equipment 10 ... laser generator
20 ... expander 30 ... diffraction grating holder part
50 ... focus lens holder

Claims (9)

delete delete delete A laser generator for generating a laser beam;
A diffraction grating holder portion for reflecting the laser beam generated by the laser generation unit and having a diffraction grating for dividing the laser beam; And
And a focus lens holder having a focus lens for passing the split laser beam reflected from the diffraction grating holder and irradiating the light guide plate to be processed.
The diffraction grating holder part is provided with a plurality of diffraction gratings, each diffraction grating is provided so that the number of division of the mutual beam is different from each other,
The plurality of diffraction gratings are selectively movable to a reflection position, which is a position capable of reflecting the laser beam,
The diffraction grating holder part includes a plate-shaped diffraction grating mounting plate
In the diffraction grating mounting plate, the plurality of diffraction gratings are arranged to be spaced apart from each other along a straight line,
And the diffraction grating mounting plate is configured to be linearly movable so that the plurality of diffraction gratings can be selectively positioned at the reflection position. A laser generator for generating a laser beam;
A diffraction grating holder portion for reflecting the laser beam generated by the laser generation unit and having a diffraction grating for dividing the laser beam; And
And a focus lens holder having a focus lens for passing the split laser beam reflected from the diffraction grating holder and irradiating the light guide plate to be processed.
The focus lens holder unit includes a plurality of focus lenses having different focal lengths,
And the plurality of focus lenses are each selectively moveable to a light transmitting position which is a position through which the laser beam can pass. The method of claim 5,
The focus lens holder portion includes a disk-shaped focus lens mounting body.
In the focus lens mounting body, the plurality of focus lenses are arranged spaced apart from each other along the circumference,
And the focus lens mounting body is rotatably configured such that the plurality of focus lenses can be selectively positioned at the light-transmitting position, respectively. The method of claim 5,
The focus lens holder unit includes a plate-shaped focus lens mounting plate
In the focus lens mounting plate, the plurality of focus lenses are disposed to be spaced apart from each other along a straight line,
And the focus lens mounting plate is configured to be linearly movable so that the plurality of focus lenses can be selectively positioned at the projection position. A laser generator for generating a laser beam;
A diffraction grating holder portion for reflecting the laser beam generated by the laser generation unit and having a diffraction grating for dividing the laser beam; And
And a focus lens holder having a focus lens for passing the split laser beam reflected from the diffraction grating holder and irradiating the light guide plate to be processed.
And the focus lens holder portion is configured to be movable in a direction in which the distance between the diffraction grating holder portion and the diffraction grating holder portion is increased. delete

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