KR20160053038A - Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket - Google Patents

Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket Download PDF

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Publication number
KR20160053038A
KR20160053038A KR1020140149261A KR20140149261A KR20160053038A KR 20160053038 A KR20160053038 A KR 20160053038A KR 1020140149261 A KR1020140149261 A KR 1020140149261A KR 20140149261 A KR20140149261 A KR 20140149261A KR 20160053038 A KR20160053038 A KR 20160053038A
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KR
South Korea
Prior art keywords
light guide
guide plate
upper roller
roller
stamper
Prior art date
Application number
KR1020140149261A
Other languages
Korean (ko)
Inventor
황정호
강정진
김종선
홍석관
김상균
Original Assignee
한국생산기술연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 한국생산기술연구원 filed Critical 한국생산기술연구원
Priority to KR1020140149261A priority Critical patent/KR20160053038A/en
Publication of KR20160053038A publication Critical patent/KR20160053038A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/13—Integrated optical circuits characterised by the manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

An apparatus for forming a light guide plate pattern is disclosed. The light guide plate pattern forming apparatus according to an embodiment of the present invention includes an upper roller formed in a non-patterned area having a cut-out shape and rotated in a direction to take out the light guide plate when the light guide plate enters, A lower roller which is arranged to be spaced apart from the light guide plate and rotates in such a direction as to rise when the light guide plate enters and to compress the light guide plate and take out the light guide plate; A stamper for forming a pattern on the light guide plate as the upper roller and the lower roller compress and rotate the light guide plate, and a stamper for rotating the upper roller and the lower roller and raising or lowering the lower roller And a driving unit.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a light guide plate pattern forming apparatus in which a stamper is fixed by a bracket,

The present invention relates to a light guide plate pattern forming apparatus in which an upper roller having a stamper and a lower roller are rotated while pressing the light guide plate to form a pattern on the light guide plate and a stamper is fixed by a bracket for taking out the light guide plate will be.

BACKGROUND ART [0002] In general, sheets such as a light guide plate and an optical film are widely used for efficiently emitting light generated from a light source such as a backlight unit to the outside.

For example, in the case of a light guide plate, the light guide plate guides the light emitted from the backlight unit upward, and irregularities or fine patterns are formed on the surface of the light guide plate to increase light efficiency by diffusing the light emitted from the light guide plate.

In order to form a concavo-convex pattern or a fine pattern on the surface of the sheet as described above, a roll with a stamper is used to press the sheet by heat to transfer the irregularities or patterns formed on the stamper to the sheet surface. Methods are being utilized.

In the conventional light guide plate pattern forming apparatus, a stamper manufactured in the form of a plate is wound around the outer periphery of the roller, the stamper is fixed to the roller at both ends thereof, and the pattern of the stamper is transferred onto the surface of the light guide plate while the roller is rotated. To form a pattern.

Here, as a method for fixing both ends of the stamper to the rollers, there is used a method of welding both ends with a laser, vacuum suction by air pressure, or bonding with an adhesive such as polyimide.

However, in the case of the laser welding, expensive laser welding equipment is required, and there is a problem that it is difficult to attach and detach because of welding fixation.

In the case of vacuum adsorption, desorption is easy, but adsorption pads for vacuum adsorption must be separately installed on the stamper or roller, and a vacuum adsorber for controlling air pressure must be additionally constructed.

In addition, the method of adhering with the adhesive such as polyimide can increase the adhesive strength, but it is difficult to remove the adhesive, and even if the adhesive is removed, the adhesive component remains on the surface of the roller or the stamper.

Further, in the light guide panel pattern forming apparatus implementing the roll rotation driving method, the stamper must be provided so as to surround the outer peripheral surface of the roller while maintaining a uniform tension as a whole. However, if the stamper is driven for a long time in a set state before driving the roller, the stamper can be relaxed by heat. However, since the tension of the stamper can not be adjusted during the rotation of the roller, the roller and the stamper are separated from each other due to the relaxation of the stamper, so that it is difficult to form a uniform pattern.

Prior Art 1: Korean Patent No. 10-0767480 Prior Art 2: Korean Patent No. 10-1175921

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and an object of the present invention is as follows.

First, the present invention is to provide a light guide plate pattern forming apparatus capable of preventing clearance between a stamper and an upper roller.

Second, the present invention provides a light guide plate pattern forming apparatus capable of preventing the stamper from moving in a direction parallel to the rotation axis of the upper roller.

Third, the present invention provides a light guide plate pattern forming apparatus capable of forming a uniform pattern on a light guide plate.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an apparatus for forming a pattern on a light guide plate, including an upper roller, a lower roller, a stamper, and a driving unit.

The upper roller is formed with a non-patterned region of a shape cut out in an oblique direction, and the upper roller rotates in a direction to take out the light guide plate when the light guide plate enters.

The lower roller is disposed below the upper roller so as to be spaced apart from the upper roller. When the light guide plate enters, the lower roller rises to compress the light guide plate and rotate in a direction to take out the light guide plate.

The stamper is wound on the outer peripheral surface of the upper roller and is fixed to the upper roller so that both ends have pretension in the non-pattern area. The stamper is fixed to the upper roller by a bracket at an edge of a part located on a curved surface of the upper roller, and a pattern is formed on the light guide plate as the upper roller and the lower roller compress and rotate the light guide plate.

The driving unit rotates the upper roller and the lower roller, and raises or lowers the lower roller.

The driving unit may include a motor, a pulley connected to the upper roller and the lower roller, respectively, and a timing belt connecting the pulleys to each other and transmitting the rotation of the motor to the pulleys.

The driving unit may include a tension adjusting unit for adjusting the tension of the timing belt as the lower roller is lifted or lowered.

In addition, the driving unit may include a hydraulic cylinder for raising or lowering the lower roller.

The edge portion of the stamper may be fixed to the upper roller.

The lower roller may be lifted until the distance between the lower roller and the upper roller is closer to the thickness of the light guide plate.

The bracket may include a first engaging portion coupled to a curved surface of the upper roller and a second engaging portion integrally formed with the first engaging portion and coupled to a side surface of the upper roller.

The first coupling portion may have the same curvature as the curvature of the upper roller.

The effects of the present invention will be described below.

According to the light guide plate pattern forming apparatus according to an embodiment of the present invention, both ends of the stamper are fixed to have the non-pattern area pretension of the upper roller, thereby preventing a gap from being formed between the stamper and the upper roller.

In addition, according to the light guide plate pattern forming apparatus according to the embodiment of the present invention, the stamper is fixed to the curved surface of the upper roller by the bracket, thereby preventing the stamper from moving in the direction parallel to the rotation axis of the upper roller.

Therefore, there is an effect that a uniform pattern can be formed on the light guide plate.

In addition, the stamper has a structure in which the stamper is fixed to the upper roller by a plurality of fastening members, thereby facilitating the detachment of the stamper and facilitating the maintenance, repair, and replacement of the stamper or the upper roller.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

The foregoing summary, as well as the detailed description of the preferred embodiments of the present application set forth below, may be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown preferred embodiments in the figures. It should be understood, however, that this application is not limited to the precise arrangements and instrumentalities shown.
1 is a front view showing a light guide plate pattern forming apparatus according to an embodiment of the present invention;
FIG. 2 is a perspective view illustrating a light guide plate pattern forming apparatus according to an embodiment of the present invention; FIG.
3 is a perspective view illustrating an upper roller of a light guide plate pattern forming apparatus according to an embodiment of the present invention in which a stamper is wound;
FIG. 4 is a front view showing an upper roller in which a stamper is wound, among the light guide plate pattern forming apparatuses according to an embodiment of the present invention; FIG. And
5 is an exploded perspective view of an upper roller and a bracket of a light guide pattern forming apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the appended drawings illustrate the present invention in order to more easily explain the present invention, and the scope of the present invention is not limited thereto. You will know.

In describing the embodiments of the present invention, it is to be noted that elements having the same function are denoted by the same names and numerals, but are substantially not identical to elements of the prior art.

Also, the terms used in the present application are used only to describe certain embodiments and are not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a front view showing a light guide plate pattern forming apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a light guide plate pattern forming apparatus according to an embodiment of the present invention.

FIG. 3 is a perspective view illustrating a top roller of a light guide plate pattern forming apparatus according to an exemplary embodiment of the present invention. FIG. 4 is a perspective view of a top roller of a light guide plate pattern forming apparatus according to an exemplary embodiment of the present invention, Fig.

Hereinafter, a light guide plate pattern forming apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.

1 and 2, the light guided pattern forming apparatus according to an embodiment of the present invention includes an upper roller 100, a lower roller 200, a stamper 300, and a driving unit 400.

The upper roller 100 is formed into a columnar shape having a circular cross-sectional shape in which an arc is cut, and the non-patterned area 110 corresponding to a portion where the arc is cut is formed in the upper roller 100. The upper roller 100 rotates in a direction to take out the light guide plate when the light guide plate enters.

The lower roller 200 is disposed at a lower portion of the upper roller 100 so as to be spaced apart from the upper roller 100. The lower roller 200 rises when the light guide plate enters and compresses the light guide plate with respect to the upper roller 100 and rotates in a direction to take out the light guide plate . Thereby, the light guide plate can be taken out by the compression and rotation of the upper roller 100 and the lower roller 200. [

As shown in Figs. 3 and 4, the stamper 300 forms a pattern on the light guide plate. The light guide plate is wound on the outer circumferential surface of the upper roller 100, and both ends thereof are fixed so as to have pre-tension in the non-pattern area 110. The stamper 300 may be coupled to the non-patterned area 110 by a fastening member such as a bolt.

In addition, the stamper 300 is fixed to the upper roller 100 by the bracket 310 at the edge of the portion located on the curved surface of the upper roller 100. Details of the bracket 310 will be described later.

Here, the fastening members for fixing the stamper 300 to the non-patterned region 110 and the fastening members for fastening the bracket 310 are all spaced apart from each other by a predetermined distance, so that the stamper 300 can have the same overall tension. In addition, since both ends of the stamper 300 are fixed to the non-pattern area 110, the pattern formation of the light guide plate may not be affected.

As the upper roller 100 and the lower roller 200 compress and rotate the light guide plate, the light guide plate is taken out and a pattern is formed on the light guide plate.

The stamper in the light guide panel pattern forming apparatus that implements the roll rotation driving system should be provided so as to surround the outer peripheral surface of the roller while maintaining a uniform tension as a whole. However, if the stamper is driven for a long time in a set state before driving the roller, the stamper can be relaxed by heat. However, since the tension of the stamper can not be adjusted during the rotation of the roller, the roller and the stamper are separated from each other due to the relaxation of the stamper, so that it is difficult to form a uniform pattern.

However, in the light guide plate pattern forming apparatus of this embodiment, the stamper 300 is provided to have a pre-tension so that the stamper 300 may not be separated from the upper roller 100 even if the stamper 300 is loosened to some extent by heat. Further, since the stamper 300 is fixed to the side surface of the roller, it is possible to prevent the stamper 300 from moving in a direction parallel to the rotation axis of the roller. Therefore, a uniform pattern can be formed on the light guide plate.

The driving unit 400 rotates the upper roller 100 and the lower roller 200 and raises or lowers the lower roller 200.

The drive unit 400 includes a pulley 420 connected to the motor 410, the upper roller 100 and the lower roller 200 to rotate the upper roller 100 and the lower roller 200, And a timing belt 430 for transmitting the rotation of the motor 410 to the pulley 420.

However, the configuration for rotating the upper roller 100 and the lower roller 200 is not limited to that described above, and may be configured in any way as long as it can rotate the upper roller 100 and the lower roller 200 have.

In addition, the driving unit 400 may include a hydraulic cylinder 450 for raising or lowering the lower roller 200. There are various structures for raising or lowering the lower roller 200. However, in this embodiment, the lower roller 200 is moved by the hydraulic cylinder 450, which makes it possible to perform more precise operations.

In addition, since the stamper 300 is fixed to the upper roller 100 by a plurality of fastening members, the stamper 300 can be easily attached to and detached from the upper roller 100, And the like.

In general, since the thickness of the light guide plate is as thin as about 5 mm, the movement of the lower roller 200 must be very precise. The lower roller 200 is spaced apart from the upper roller 100 before the light guide plate is inserted and when the light guide plate enters between the upper roller 100 and the lower roller 200, the lower roller 200 and the upper roller 100 ) Of the light guide plate is close to the thickness of the light guide plate but can not be brought into contact with each other. As a result, the upper roller 100 and the lower roller 200 can press the light guide plate and simultaneously rotate to form a pattern on the light guide plate, thereby transferring the light guide plate.

The driving unit 400 may include a tension adjusting unit 440 that adjusts the tension of the timing belt 430 as the lower roller 200 is lifted or lowered.

As the lower roller 200 moves, the distance between the plurality of pulleys 420 may vary. Accordingly, the tension of the timing belt 430 connecting the plurality of pulleys 420 can also be changed. Accordingly, the tension adjuster 440 can automatically adjust the tension of the timing belt 430 to smoothly transmit the rotation of the motor 410 to the pulley 420 even when the lower roller 200 moves.

5 is an exploded perspective view of an upper roller and a bracket of a light guide pattern forming apparatus according to an embodiment of the present invention.

5, the bracket 310 of the present embodiment is a bracket having an L-shaped cross section. The bracket 310 includes a first coupling portion 310a coupled to a curved surface of the upper roller 100, a first coupling portion 310a And a second engaging portion 310b integrally formed with the upper roller 100 so as to be perpendicular to the upper roller 100 and coupled to a side surface of the upper roller 100. [

The first coupling portion 310a may have the same curvature as the curvature of the upper roller 100. Thus, the bracket 310 can be closely contacted with the upper roller 100 without squeaking.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

100: upper roller 110: non-patterned area
200: lower roller 300: stamper
310: bracket 310a: first engaging portion
310b: second coupling portion 400:
410: motor 420: pulley
430: timing belt 440:
450: Hydraulic cylinder

Claims (8)

A non-patterned region of a cut-out shape is formed, and the upper roller is rotated in a direction to take out the light guide plate when the light guide plate enters;
A lower roller disposed at a lower portion of the upper roller and spaced apart from the upper roller and rotated in a direction to rise when the light guide plate enters and to compress the light guide plate and take out the light guide plate;
The upper roller is wound on the outer circumferential surface of the upper roller and is fixed to the upper roller so that both ends have pre-tension in the non-pattern area, the edge of the portion located on the curved surface of the upper roller is fixed to the upper roller by a bracket A stamper for forming a pattern on the light guide plate as the upper roller and the lower roller compress and rotate the light guide plate; And
A driving unit that rotates the upper roller and the lower roller and raises or lowers the lower roller;
And the light guide plate pattern forming device. The method according to claim 1,
The driving unit includes:
motor;
A pulley connected to the upper roller and the lower roller, respectively; And
A timing belt connecting each of the pulleys and transmitting rotation of the motor to the pulleys;
And the light guide plate pattern forming device. 3. The method of claim 2,
The driving unit includes:
And a tension adjuster for adjusting the tension of the timing belt as the lower roller is lifted or lowered. The method according to claim 1,
The driving unit includes:
And a hydraulic cylinder for raising or lowering the lower roller. The method according to claim 1,
And an edge portion of the stamper is fixed to the upper roller. The method according to claim 1,
The lower roller includes:
And the distance from the upper roller is increased until the distance is closer to the thickness of the light guide plate. The method according to claim 1,
The bracket
A first engaging portion coupled to a curved surface of the upper roller; And
A second engaging part integrally formed to be perpendicular to the first engaging part and coupled to a side surface of the upper roller;
And the light guide plate pattern forming device. 8. The method of claim 7,
Wherein the first coupling portion includes:
And has a curvature equal to a curvature of the upper roller.
KR1020140149261A 2014-10-30 2014-10-30 Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket KR20160053038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140149261A KR20160053038A (en) 2014-10-30 2014-10-30 Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140149261A KR20160053038A (en) 2014-10-30 2014-10-30 Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket

Publications (1)

Publication Number Publication Date
KR20160053038A true KR20160053038A (en) 2016-05-13

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KR1020140149261A KR20160053038A (en) 2014-10-30 2014-10-30 Pattern Forming Apparatus for Light Guide Panel Having Stamper Fixed by Bracket

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109927264A (en) * 2019-04-17 2019-06-25 王莉 A kind of light guide plate hot-rolling pressing production line and hot rolling process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109927264A (en) * 2019-04-17 2019-06-25 王莉 A kind of light guide plate hot-rolling pressing production line and hot rolling process
CN109927264B (en) * 2019-04-17 2024-03-15 王莉 Hot rolling production line and hot rolling process for light guide plate

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