KR20100054314A - Backlight unit prism light guide panel processing equipment of shaping processing method by vibration cutting instrument using piezoelectric element - Google Patents

Backlight unit prism light guide panel processing equipment of shaping processing method by vibration cutting instrument using piezoelectric element Download PDF

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Publication number
KR20100054314A
KR20100054314A KR1020080113184A KR20080113184A KR20100054314A KR 20100054314 A KR20100054314 A KR 20100054314A KR 1020080113184 A KR1020080113184 A KR 1020080113184A KR 20080113184 A KR20080113184 A KR 20080113184A KR 20100054314 A KR20100054314 A KR 20100054314A
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South Korea
Prior art keywords
light guide
processing apparatus
shaping
prism light
cutting
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KR1020080113184A
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Korean (ko)
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권장열
정동철
안중환
강동배
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주식회사 엠앤엘
부산대학교 산학협력단
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Priority to KR1020080113184A priority Critical patent/KR20100054314A/en
Publication of KR20100054314A publication Critical patent/KR20100054314A/en

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    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • B23D25/02—Flying shearing machines
    • B23D25/06—Flying shearing machines having a cutting device mounted on an oscillating lever
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D3/00—Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line
    • B23D3/02—Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line for cutting grooves
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: A backlight-unit prism light guide panel processing apparatus of a shaping processing method due to a vibration cutting unit with a piezoelectric element is provided to reduce a cutting load by forming a desired pattern on a light transmission unit. CONSTITUTION: The shaping unit(18) of a processing apparatus(12) forms a desire pattern on the transmission part of a prism light guide unit by a vibration due to the frequency which is applied to a vibration unit. The processing apparatus includes an X-axis transfer rail(13) and an Y-axis transfer rail(15) based on a stone surface plate(11). A table with a vacuum absorbent unit is loaded on the X-axis transfer rail. A spindle with a rotary cutting unit is loaded on the Y-axis transfer rail.

Description

압전소자를 이용한 진동절삭기구에 의한 세이핑 가공방법의 백라이트 유니트 프리즘 도광판 가공장치{Backlight unit prism light guide panel processing equipment of shaping processing method by vibration cutting instrument using piezoelectric element}Backlight unit prism light guide panel processing equipment of shaping processing method by vibration cutting instrument using piezoelectric element}

본 발명은 티에프티-엘시디(TFT-LCD)의 백라이트를 구성하는 프리즘 도광판의 투광부를 절삭가공하는 공구대에 압전소자를 이용한 진동발생장치를 부착하여 투광부에 원하는 패턴을 형성할 수 있게 하여 투광부에 입사되는 빛의 굴절각을 보정하고, 절삭부하를 줄여 절삭량을 증대할 수 있게 한 것에 관한 것이다.The present invention attaches a vibration generating device using a piezoelectric element to a tool stage for cutting the light transmitting portion of the prism light guide plate constituting the backlight of the TFT-LCD to form a desired pattern on the light transmitting portion The present invention relates to correcting an angle of refraction of light incident on a light portion and reducing a cutting load so as to increase the cutting amount.

티에프티-엘시디 디스플레이는 컴퓨터나 TV용으로 널리 사용되고 있으나 자체발광이 되지 않아 그 후면에 광원을 두어 화면을 밝혀주는 백라이트 유니트를 구비하고 있다.TFT-LCD displays are widely used for computers and TVs, but they do not emit light by themselves and have a backlight unit that illuminates the screen by placing a light source on the back.

백라이트 유니트를 구성하는 프리즘 도광판은 통상 투명아크릴 소재를 사용하여 사출성형되며, 프리즘의 일측면에서 입사되는 광원을 경사진 하면에서 반사시 켜 프리즘의 전면에서 균일하게 출광되게 하는 구조로 구성되어 있으며, 프리즘 도광판의 광원이 입사되는 측면부는 난반사가 일어나지 않도록 광학적 흠집이 없는 상태의 조도유지와 함께 출광부와 90°각도를 유지할 수 있도록 정밀하게 가공되어져야 한다.The prism light guide plate constituting the backlight unit is injection molded using a transparent acrylic material, and is configured in such a manner that the light source incident from one side of the prism is reflected from the inclined bottom surface so as to be uniformly emitted from the front surface of the prism. The side part where the light source of the prism light guide plate is incident should be precisely processed to maintain the 90 ° angle with the light exiting part together with maintaining the roughness without optical scratches so that no diffuse reflection occurs.

그러나 프리즘 도광판과 같은 플라스틱계 광학부품은 재료의 종탄성계수가 작아 변형되기 쉽고, 공구인성 형상의 전사성이 좋지 못하기 때문에 절삭가공에 의해 광학부품으로서의 정도를 만족시키기 곤란하다.However, plastic optical parts, such as a prism light guide plate, have a low Young's modulus of elasticity, are easily deformed, and have poor tool toughness transferability, which makes it difficult to satisfy the degree of optical parts by cutting.

실제 프리즘의 일측면에서 입사되는 광원의 빛을 받아들이는 도광판 투광부의 가공은 다이아몬드 공구를 사용하나 단순한 절삭가공으로 인하여 미세절삭가공에서의 치수효과에 의한 절삭력의 증가, 재료결정입계의 영향 등에 의해 심한 소성변형과 재료의 탈락 등이 유발되며, 버(Burr) 및 가공형상의 찌그러짐에 의한 표면조도의 저하 등의 결과를 가져왔다.The light guide plate transmissive part that receives the light from the light source incident from one side of the prism is actually a diamond tool, but due to the simple cutting, the cutting force is increased due to the dimensional effect in the fine cutting process, and it is severely affected by the grain boundary. Plastic deformation and material dropout are caused, resulting in a decrease in surface roughness due to burrs and crushing of the processed shape.

따라서 상기와 같은 프리즘 도광판의 가공방법은 가공조건에 따라 투광부에 상이한 패턴을 형성하여 굴절각을 보정하는 것이 불가능하며, 조도유지를 위해 절삭속도와 절삭절입 깊이에 한계성이 있었다.Therefore, the above-described processing method of the prism light guide plate is impossible to correct the angle of refraction by forming different patterns on the light transmitting part according to the processing conditions, and the cutting speed and cutting depth have a limit in maintaining roughness.

본 발명은 상기와 같은 문제점을 해결하기 위하여 개발된 것으로 투광부의 가공패턴의 조정을 가능하게 하여 굴절각의 보정을 용이하게 하는 것을 목적으로 한다.The present invention was developed to solve the above problems, and an object of the present invention is to facilitate the adjustment of the processing pattern of the light transmitting part to facilitate the correction of the refractive angle.

또한 본 발명은 절삭저항을 줄여 절삭량을 증대하여 절삭시간을 단축하고 절삭공구의 수명을 연장할 수 있게 하는 것이다.In addition, the present invention is to reduce the cutting resistance to increase the amount of cutting to shorten the cutting time and to extend the life of the cutting tool.

본 발명은 세이핑 공구대에 압전소자를 이용한 진동발생장치를 부착하여 절삭공구에 진동을 부가하면서 주파수의 변경에 따라 투광부에 원하는 패턴을 형성할 수 있게 한다.The present invention attaches a vibration generating device using a piezoelectric element to the shaping tool stand to add a vibration to the cutting tool and form a desired pattern on the light transmitting part according to the change of frequency.

본 발명은 일반절삭의 경우 공구가 공작물에 절입되면 가공계 전체가 정적 평형을 이룰 때까지 절삭력이 작용하는데 비하여 진동절삭은 고속의 절삭이 순간적으로 이루어진 후 공구가 후퇴하여 절삭이 이루어지지 않기 때문에 과도적인 상태에서만 절삭이 진행되어 진동공구는 전체주기 중 실절삭시간 동안에만 접촉하므로 평균절삭온도를 낮출 수 있으며, 실절삭시간이 짧아 절삭공구에 구성인선이 부착될 시간적 여유가 없고 마찰력의 저감효과로 구성인선의 발생을 억제시킬 수 있다.According to the present invention, in the case of general cutting, the cutting force is applied until the entire processing system is in a static equilibrium when the tool is plunged into the workpiece, whereas the vibration cutting is excessive because the cutting of the tool is retracted after the high speed cutting is instantaneously made. Since the cutting is only in normal condition, the vibrating tool contacts only during the actual cutting time during the entire cycle, so the average cutting temperature can be lowered.The actual cutting time is short, so there is no time to attach the component edge to the cutting tool and the frictional force is reduced. The occurrence of construction edge can be suppressed.

따라서 가공물의 가공변형, 버의 발생저감, 기하학적 거칠기 개선, 공구의 수명을 연장시킬 수 있게 하는 등의 효과가 있다.Therefore, there is an effect such as processing deformation of the workpiece, generation of burrs, improvement of geometric roughness, extension of tool life.

이하에서 본 발명의 바람직한 실시 예에 대하여 첨부한 도면을 참조하여 상세하게 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명 프리즘 도광판 가공장치의 개념적인 사시도이고, 도 2는 본 발명 가진기구를 부착한 프리즘 도광판의 세이핑 공구대를 구성하는 개념도이며, 도 3은 본 발명의 절삭부의 상세도이고, 도 4는 본 발명이 적용되는 프리즘 도광판의 사시도이다.1 is a conceptual perspective view of the prismatic light guide plate processing apparatus of the present invention, Figure 2 is a conceptual view constituting a shaping tool post of the prism light guide plate with the present invention mechanism, Figure 3 is a detailed view of the cutting portion of the present invention, 4 is a perspective view of a prism light guide plate to which the present invention is applied.

도면에 도시한 바와 같이 본 발명의 프리즘 도광판 가공장치는 열변위에 대한 영향을 받지 않도록 프레임상에 석정반(11)을 베이스로 하여 가공장치(12)를 구성한다.As shown in the figure, the prism light guide plate processing apparatus of the present invention configures the processing apparatus 12 based on the stone plate 11 on the frame so as not to be affected by thermal displacement.

가공장치(12)는 기본적으로 X축상을 직선이동할 수 있는 X축 이송레일(13)과, 테이블(14) 및 Y축상을 직선이동할 수 있는 Y축 이송레일(15)과 이에 장착되는 스핀들(16)을 구비하며, Y축 이송레일(15)의 일측 석정반(11)상에는 세이핑 공구(18)인 고정바이트를 구비한 세이핑 공구대(17)가 구비된다.The processing apparatus 12 basically includes an X-axis feed rail 13 capable of linearly moving the X-axis, a Y-axis feed rail 15 capable of linearly moving the table 14 and the Y-axis, and a spindle 16 mounted thereto. And a shaping tool post 17 having a fixed bite, which is a shaping tool 18, on one side stone plate 11 of the Y-axis feed rail 15.

세이핑 공구(18)인 바이트는 X축 이송레일(13)에 대하여 직각방향으로 세이핑 공구(18)인 바이트의 절입량 조절을 위한 이송이 가능하게 구성되어 있다.The bite which is the shaping tool 18 is comprised so that the feed for adjusting the cutting amount of the bite which is the shaping tool 18 in the perpendicular direction with respect to the X-axis feed rail 13 is possible.

테이블(14)의 상부면은 프리즘 도광판(20)의 상부면을 형성하는 출광부를 진 공흡착방식으로 고정할 수 있도록 대전박막처리되며, X축 및 Y축 이송레일(13,15)은 리니어 스테이지 부착형으로 하는 것이 이송시 진동방지 등을 위하여 바람직하다.The upper surface of the table 14 is charged with a thin film so as to fix the light emitting portion forming the upper surface of the prism light guide plate 20 by vacuum adsorption, and the X-axis and Y-axis feed rails 13 and 15 are linear. It is preferable to use a stage attachment type for vibration prevention during transportation.

또한 본 가공장치에는 프리즘 도광판(20)을 로딩 및 언로딩할 수 있게 하여 가공작업을 자동화할 수 있으며, 프리즘 도광판(20)을 테이블(14)의 정위치에 안치될 수 있게 하는 위치결정기구(19)가 구비된다.In addition, the present processing device can be loaded and unloaded prism light guide plate 20 to automate the machining operation, positioning mechanism for placing the prism light guide plate 20 in the correct position of the table 14 ( 19).

이하에서 본 가공장치의 작용에 대하여 설명한다.The operation of the present processing device will be described below.

도 2와 도 3에 도시한 바와 같이 세이핑 공구를 이송하는 공구이송유닛(1)에 공구를 고정하는 공구고정블록(2)을 부착, 공구고정블록(2)에 세이핑 공구(18)를 고정한다.As shown in Figs. 2 and 3, the tool fixing block 2 for fixing the tool is attached to the tool transfer unit 1 for transferring the shaping tool, and the shaping tool 18 is attached to the tool fixing block 2. Fix it.

공구고정블록(2)과 세이핑 공구(18) 사이에는 압전소자를 이용한 가진기구(5)가 세이핑 공구(18)에 삽입되고 공구고정블록(2)에 고정되어 가진기구(5)에서 발생하는 진동으로 세이핑 공구(18)를 가공물의 절삭깊이방향으로 직각방향으로 진동이 전달되게 구성하여 프리즘 도광판(20)을 절삭가공한다.An excitation mechanism 5 using a piezoelectric element is inserted between the tool fixing block 2 and the shaping tool 18 into the shaping tool 18 and fixed to the tool fixing block 2 to be generated in the excitation mechanism 5. The shaping tool 18 is configured to transmit vibrations in a direction perpendicular to the cutting depth direction of the workpiece by vibrations to cut the prism light guide plate 20.

절삭가공되는 프리즘 도광판(20)은 가진기구(5)에 가해지는 주파수에 따라 일정한 패턴을 형성한다.The prism light guide plate 20 to be cut forms a constant pattern according to the frequency applied to the excitation mechanism 5.

본 발명은 티에프티-엘시디용 프리즘 도광판의 투광부를 절삭가공하는 작업에 이용이 가능하다.INDUSTRIAL APPLICABILITY The present invention can be used for the work of cutting the light-transmitting part of the TFT-LCD prism light guide plate.

도 1은 본 발명 프리즘 도광판 가공장치의 개념적인 사시도1 is a conceptual perspective view of the prismatic light guide plate processing apparatus of the present invention

도 2는 본 발명 세이핑 공구대의 개념적인 사시도2 is a conceptual perspective view of the present invention shaping tool stand

도 3은 본 발명 절삭부 상세 사시도3 is a detailed perspective view of the present invention cutting unit

도 4는 본 발명이 적용되는 프리즘 도광판의 사시도4 is a perspective view of a prism light guide plate to which the present invention is applied;

※ 도면의 주요부분에 대한 부호의 설명[Description of Drawings]

1. 공구이송유닛 2. 공구고정블록1. Tool transfer unit 2. Tool fixing block

5. 가진기구 11. 석정반5. Exciting mechanism 11.

12. 가공장치 13. X축 이송레일12. Machining Equipment 13. X-axis Feed Rail

14. 테이블 15. Y축 이송레일14. Table 15. Y-axis feed rail

16. 스핀들 17. 세이핑 공구대16. Spindle 17. Shaping Tool Stand

18. 세이핑 공구 19. 위치결정기구18. Shaping Tool 19. Positioning Mechanism

20. 프리즘 도광판20. Prism Light Guide Plate

Claims (2)

압전소자에서 발생하는 진동을 절삭공구에 가하여 백라이트 유니트 프리즘 도광판의 투광부를 세이핑하는 가공장치에 있어서,In the processing apparatus for applying the vibration generated from the piezoelectric element to the cutting tool to clean the light transmitting portion of the backlight unit prism light guide plate, 가공장치(12)의 세이핑 공구(18)에는 가진기구(5)에 가해지는 주파수에 따라 발생하는 진동을 전달하여 프리즘 도광판(20) 투광부에 원하는 패턴을 형성하는 것을 특징으로 하는 압전소자를 이용한 진동절삭기구에 의한 세이핑 가공방법의 백라이트 유니트 프리즘 도광판 가공장치.The shaping tool 18 of the processing apparatus 12 transmits vibration generated according to the frequency applied to the excitation mechanism 5 to form a desired pattern on the light-transmitting portion of the prism light guide plate 20. Back light unit prism light guide plate processing apparatus of shaping processing method by using vibration cutting mechanism. 제 1항에 있어서, 가공장치(12)는 석정반(11)을 베이스로 하여 X축 이송레일(13)과, X축 이송레일과 직교하는 Y축 이송레일(15)을 구비하고, X축 이송레일에는 표면의 대전박막처리되어 진공흡착장치를 갖춘 테이블(14)이 탑재되고, Y축 이송레일(15)에는 회전절삭공구를 장착하는 스핀들이 구비되며, X축 이송레일의 일측 석정반(11)상에는 세이핑 공구대(17)가 구비된 것을 특징으로 하는 압전소자를 이용한 진동절삭기구에 의한 세이핑 가공방법의 백라이트 유니트 프리즘 도광판 가공장치.The processing apparatus (12) according to claim 1, wherein the processing apparatus (12) includes an X-axis feed rail (13) and a Y-axis feed rail (15) orthogonal to the X-axis feed rail, based on the stone slab (11). The conveying rail is equipped with a table 14 having a vacuum thin film treatment on the surface thereof, and the Y-axis conveying rail 15 is provided with a spindle for mounting a rotary cutting tool, and is provided on one side of the X-axis conveying rail ( 11) Back light unit prism light guide plate processing apparatus of the shaping processing method by a vibration cutting mechanism using a piezoelectric element, characterized in that the shaping tool stage (17) is provided on.
KR1020080113184A 2008-11-14 2008-11-14 Backlight unit prism light guide panel processing equipment of shaping processing method by vibration cutting instrument using piezoelectric element KR20100054314A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113977714A (en) * 2021-11-11 2022-01-28 李�荣 Labor-saving woodworking plane for wood processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113977714A (en) * 2021-11-11 2022-01-28 李�荣 Labor-saving woodworking plane for wood processing

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