WO2023106775A1 - Light guide plate using hybrid pattern and display device including same - Google Patents

Light guide plate using hybrid pattern and display device including same Download PDF

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Publication number
WO2023106775A1
WO2023106775A1 PCT/KR2022/019646 KR2022019646W WO2023106775A1 WO 2023106775 A1 WO2023106775 A1 WO 2023106775A1 KR 2022019646 W KR2022019646 W KR 2022019646W WO 2023106775 A1 WO2023106775 A1 WO 2023106775A1
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WIPO (PCT)
Prior art keywords
light
guide plate
light guide
dot
dots
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PCT/KR2022/019646
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French (fr)
Korean (ko)
Inventor
류충엽
최호범
이승근
유래완
송현근
이경태
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주식회사 에이치비테크놀러지
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Publication of WO2023106775A1 publication Critical patent/WO2023106775A1/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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • 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
    • 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
    • G02F1/1336—Illuminating devices
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the present invention relates to a light guide plate using a hybrid pattern and a display device including the same, and more particularly, to a technique for minimizing visibility of defects in the light guide plate by increasing light dispersion.
  • a liquid crystal display is one of the most widely used flat panel displays (FPD), and consists of two substrates on which electrodes are formed and a liquid crystal layer inserted therebetween. It is a device that displays an image by adjusting the amount of transmitted light by rearranging the liquid crystal molecules of the liquid crystal layer by applying a .
  • a display such as a liquid crystal display (LCD) uses a two-dimensional light source that transmits light emitted from a one-dimensional light source to a light guide plate and then transmits through one surface thereof.
  • the efficiency of the surface light source is the overall efficiency of the display device. It is emerging as an important factor in determining performance.
  • the efficiency of light in a conventional liquid crystal display (LCD) is about 3 to 10%, and light loss mainly occurs in a light guide plate, a polarizer, and a color filter.
  • the size of the pattern is formed very finely in preparation for defects, and the vulnerability of the light guide plate to defects has increased.
  • the visibility of such excessive defects may increase the defect rate of the light guide plate, reduce the efficiency of the assembly process, and deteriorate the image quality of the display.
  • a conventional backlight device may include a light guide plate, a reflective sheet installed under the light guide plate, a QD sheet installed above the light guide plate, a diffusion sheet, a prism sheet, a DBED sheet, and a light source installed on one side of the light guide plate.
  • the light guide plate is made of PMMA (Poly Methylmethacrylate), MS (Methylmethacrlate Styrens), PS (Poly Styrene), PC (Poly Carbonate), PET (polyethylene terephthalate), etc. It can be made of the same plastic or resin.
  • the light guide plate includes a pattern of a predetermined shape on one side of the inside.
  • a plurality of circular, elliptical, and vertical bar patterns are formed at regular or random intervals in the horizontal and vertical directions of light emitted from an external light source.
  • the light emitted from the external light source After the light emitted from the external light source is incident on the light guide plate, a part of it is emitted to the outside of the light guide plate by the pattern, but some defects play a role similar to the pattern and are likewise emitted to the outside. A part of the light emitted by the defect is emitted as light having a higher intensity than the pattern, so that a light non-uniformity region that is noticeable in a backlight requiring a uniform surface light source as a whole can be visually recognized.
  • the prior art has a problem in that a partial area of the liquid crystal screen is brightened due to a non-uniformity phenomenon generated from the defect, so that the overall appearance is not uniform.
  • Patent Document 1 Korea Patent Registration No. 10-1158524 (2012.06.21)
  • the present invention can provide a light guide plate using a hybrid pattern capable of minimizing non-uniform visibility formed as defects by densely controlling existing patterns formed on the light guide plate and a display device including the same.
  • a dot pattern for dispersing light incident from a light incident surface on a side surface to the front surface is densely formed in a predetermined number on a surface facing the front surface, and the light incident surface a plurality of dot groups provided in any one of a precise arrangement having the same spacing in the horizontal and vertical directions and a random arrangement in which the spacing is random; and light dispersion dots provided between the spaced apart spaces of the dot groups to multi-directionally disperse light sources incident between the respective dot groups.
  • the light dispersion dots may be equally spaced in one direction.
  • the light dispersion dots may be formed at random positions.
  • the light dispersion dots are collinear in one direction, but spaced apart from each other may be randomly formed.
  • the light dispersion dots may be zigzag with each other in one direction.
  • the light dispersion dots may disperse the incident light source at a wider angle than the dot pattern.
  • the dot groups and light dispersion dots may be formed by any one of a printing technique, an injection technique, an imprinting technique, a laser processing technique, a V-cutting technique, and a stamp technique.
  • the dot groups and the light dispersion dots may be formed in any one of a polygonal shape, a circular shape, and an elliptical shape.
  • the distribution density of the light dispersion dots may be changed in each direction.
  • it may be a display device including a light guide plate using a hybrid pattern.
  • the light can reach the liquid crystal screen uniformly, and the quality and productivity of the display can be improved by minimizing defects in mass production of the large light guide plate.
  • FIG. 1 is a configuration diagram illustrating a light guide plate using a hybrid pattern according to an exemplary embodiment.
  • FIG. 2 is a diagram schematically illustrating a light dispersion principle according to an exemplary embodiment.
  • FIG 3 is a first cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • FIG. 4 is a second cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • FIG. 5 is a third cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • FIG. 6 is a first cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • FIG. 7 is a second cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • FIG. 8 is a third cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • FIG. 9 is a first cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • FIG. 10 is a second cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • FIG. 11 is a third cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • FIG. 12 is a diagram illustrating an appearance state of a light guide plate to which an arrangement of dot groups and light dispersion dots according to an exemplary embodiment is applied.
  • FIG. 1 is a configuration diagram illustrating a light guide plate using a hybrid pattern according to an exemplary embodiment.
  • a light guide plate 100 using a hybrid pattern may include a dot group 20 and light dispersion dots 30 .
  • the dot group 20 may be formed by densely concentrating a predetermined number of dot patterns 10 on a surface facing the front surface to disperse the light source 40 incident from the light incident surface on the side to the front surface.
  • the light dispersion dots 30 are provided between the spaced apart spaces of the dot groups 20 and can disperse the light sources 40 incident between the respective dot groups 20 in multiple directions.
  • the light dispersion dots may be spaced at equal intervals in one direction, may be formed at random positions, and may be formed on the same line in one direction but at random intervals.
  • the light dispersion dots 30 may be zigzag with each other in one direction.
  • the light dispersion dots 30 can disperse the incident light source 40 at a wider angle than the dot pattern 10, and the distribution density of the light dispersion dots 30 can be changed in each direction.
  • the dot group 20 and the light dispersion dots 30 may be formed by any one of a printing technique, an injection technique, an imprinting technique, a laser processing technique, a V-cutting technique, and a stamp technique, and the dot group 20 And the light dispersion dots 30 may be formed in any one of polygonal, circular, and elliptical shapes, but each dot group 20 and the light dispersion dots 30 are not necessarily limited to the above-described technique and shape.
  • a display device including the light guide plate 100 having the aforementioned characteristics may be manufactured, and specific components of the display device are not limited.
  • FIG. 2 is a diagram schematically illustrating a light dispersion principle according to an exemplary embodiment.
  • the light source 40 incident from the side is the light source 40 incident by the dot pattern 10 provided on one side of the light guide plate 100.
  • the degree of dispersion of the light source 40 increases proportionally as the density of the dot pattern 10 increases, the amount of light emitted to the front portion where the dot group 20 in which the dot pattern 10 is densely located increases. .
  • the amount of light emitted from the light source 40 may decrease by the distance between the dot groups 20 .
  • 3 to 5 are cross-sectional views illustrating the light dispersion dots 30 arranged by arrangement in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an exemplary embodiment.
  • FIG 3 is a first cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • the dot groups 20 are equally spaced apart, but the light source 40 is incident on the surface.
  • potting soil groups provided at equal intervals in each longitudinal direction may be provided in a zigzag form.
  • the light dispersion dots 30 may be provided at equal intervals between each dot group 20 provided in the longitudinal direction.
  • the spaced intervals of the light dispersion dots 30 may be changed, and even if they are provided with a change, they may be equally spaced.
  • the light guide plate 100 in which the dot groups 20 are precisely arranged according to an embodiment between the dot groups 20 provided at equal intervals in each longitudinal direction based on the surface on which the light source 40 is incident, The light dispersion dots 30 are provided, but are not limited thereto, and the light dispersion dots 30 may be provided between spaced apart spaces of each dot group 20 .
  • FIG. 4 is a second cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • the dot groups 20 are equally spaced apart, and the light dispersion dots 30 are each dot. It may be provided at random intervals between the groups 20 .
  • FIG. 5 is a third cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
  • the dot groups 20 are equally spaced apart, and the light dispersion dots 30 are arranged in the vertical direction. It is provided on the same line between each dot group 20 provided, but the spacing may be provided in a random form.
  • the random spacing of the light dispersion dots 30 may be randomly adjusted after a predetermined number of patterns.
  • the number of light dispersion dots 30 provided on the same line in the horizontal direction based on the light incident surface, but provided at random intervals, is set to determine the spacing between the light dispersion dots 30 provided in each horizontal direction. can be set
  • 6 to 8 are cross-sectional views of each arrangement of the light dispersion dots 30 in the light guide plate 100 in which the dot groups 20 are randomly arranged according to an exemplary embodiment.
  • FIG. 6 is a first cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • the spacing between the respective dot groups 20 may be randomly provided.
  • the light dispersion dots 30 may be provided at equal intervals in each longitudinal direction based on the surface on which the light source 40 is incident. At this time, the light dispersion dots 30 provided on the same line in one direction may be discontinuously arranged by the randomly provided dot groups 20 .
  • FIG. 7 is a second cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • the spacing between the respective dot groups 20 is provided at random, and the dot groups 20 are spaced apart at random. Separation intervals of the provided light dispersion dots 30 may be provided randomly.
  • FIG. 8 is a third cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
  • the dot groups 20 may be spaced at random intervals.
  • the light dispersion dots 30 are provided on the same line in the longitudinal direction with respect to the surface on which the light source 40 is incident, and the distances between the light dispersion dots 30 may be randomly provided.
  • the random spacing of the light dispersion dots 30 may be randomly adjusted after a predetermined number of patterns.
  • the number of light dispersion dots 30 provided on the same line in the horizontal direction based on the light incident surface, but provided at random intervals, is set to determine the spacing between the light dispersion dots 30 provided in each horizontal direction. can be set
  • 9 to 11 are cross-sectional views of each arrangement of the light dispersion dots 30 in the light guide plate 100 in which the dot groups 20 are arranged in precise and random arrangements according to an exemplary embodiment.
  • FIG. 9 is a first cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • the first and second rows are grouped into a first row group 51 and a third Rows and the fourth row may be grouped into the second row group 52 and the arrangement of the dot groups 20 may be changed for each row group 50 .
  • the third row and fourth row of the second row group 52 may be random arrangements.
  • the precise arrangement of the rows and the second row may be equally spaced, but the arrangement of each row may be zigzag, and the random arrangement of the third and fourth rows may be on the same line with respect to each row or the spacing of the dot groups 20 This may be provided randomly.
  • the light dispersion dots 30 may be provided at regular intervals in one direction between each row and each row group 50 .
  • the light dispersion dots 30 may have a zigzag arrangement of each of the light dispersion dots 30 provided in one direction.
  • FIG. 10 is a second cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • each row group 50 is arranged in precise and random arrangements. It is provided in one form, and the light dispersion dots 30 may be randomly provided between or around each row and each row group 50 .
  • FIG. 11 is a third cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
  • each row group 50 is provided in either a precise arrangement or a random arrangement.
  • the light dispersion dots 30 are provided in one direction between each row and each row group 50, and the distance between each light dispersion dot 30 may be provided at random.
  • FIG. 12 is a diagram illustrating an appearance state of a light guide plate to which an arrangement of dot groups and light dispersion dots according to an exemplary embodiment is applied.
  • the appearance state of the light guide plate 100 to which the arrangement of the dot groups 20 and the light dispersion dots 30 according to an embodiment is applied is (a) the light guide plate 100 to which the general dot pattern 10 is applied. ), and (b) shows the light guide plate 100 to which the hybrid pattern is applied.
  • the light guide plate 100 to which the hybrid pattern is applied disperses more light sources 40, it can be seen that the defect A1 and the scratch A2 have disappeared.

Abstract

The present invention relates to a light guide plate using a hybrid pattern and a display device including the light guide plate. The light guide plate includes: multiple dot groups having a predetermined number of dot patterns, which disperse a light source incident from a light incident surface of a side surface thereof to the front surface thereof and are densely formed on a surface facing the front surface; and light dispersion dots provided in spaced spaces between the dot groups to disperse the light source incident to each of the spaces between the dot groups in multiple directions. The light guide plate enables light to uniformly reach a liquid crystal screen, and thus can minimize defects at the time of mass production of large-scale light guide plates, so as to improve display quality and productivity.

Description

하이브리드 패턴을 이용한 도광판 및 이를 포함하는 디스플레이 장치Light guide plate using hybrid pattern and display device including the same
본 발명은 하이브리드 패턴을 이용한 도광판 및 이를 포함하는 디스플레이 장치에 관한 것으로, 더욱 상세하게는 빛의 분산을 가중하여 도광판 내의 결점의 시인화를 최소화한 기술에 관한 것이다.The present invention relates to a light guide plate using a hybrid pattern and a display device including the same, and more particularly, to a technique for minimizing visibility of defects in the light guide plate by increasing light dispersion.
현대 사회의 기술력이 고도화됨에 따라 일상생활에서 흔히 볼 수 있는 표시 장치는 대형화 및 박형화에 대한 시장의 요구에 직면하고 있다.As the technology of modern society is advanced, display devices commonly seen in daily life face market demands for larger and thinner displays.
종래의 CRT(Cathode-ray tube) 장치로는 이러한 요구를 충분히 만족시키지 못함에 따라, PDP(Plasma Display Panel) 장치, LCD(Liquid Crystal Display) 장치, 및 OLED(Organic Light-Emitting Diode) 장치 등으로 대표되는 평판 표시 장치에 대한 수요가 폭발적으로 늘어나고 있다.As conventional CRT (Cathode-ray tube) devices do not sufficiently satisfy these demands, PDP (Plasma Display Panel) devices, LCD (Liquid Crystal Display) devices, OLED (Organic Light-Emitting Diode) devices, etc. Demand for a representative flat panel display device is explosively increasing.
액정 표시 장치(LCD)는 현재 가장 널리 사용되고 있는 평판 표시 장치(Flat Panel Display, FPD) 중 하나로서, 전극이 형성되어 있는 두 장의 기판과 그 사이에 삽입되어 있는 액정층으로 이루어지며, 전극에 전압을 인가하여 액정층의 액정 분자들을 재배열시킴으로써 투과되는 빛의 양을 조절하여 영상을 표시하는 장치이다.A liquid crystal display (LCD) is one of the most widely used flat panel displays (FPD), and consists of two substrates on which electrodes are formed and a liquid crystal layer inserted therebetween. It is a device that displays an image by adjusting the amount of transmitted light by rearranging the liquid crystal molecules of the liquid crystal layer by applying a .
일반적으로, 액정 표시장치(LCD)와 같은 디스플레이는 1차원 광원으로부터 방출된 빛을 도광판으로 입사시킨 후에 그 일면을 통하여 투과되는 2차원 광원을 이용하는데, 이 때 면광원의 효율이 디스플레이 장치의 전반적인 성능을 결정하는 중요한 요소로 대두되고 있다.In general, a display such as a liquid crystal display (LCD) uses a two-dimensional light source that transmits light emitted from a one-dimensional light source to a light guide plate and then transmits through one surface thereof. At this time, the efficiency of the surface light source is the overall efficiency of the display device. It is emerging as an important factor in determining performance.
종래의 액정 표시 장치(LCD)에서의 빛의 효율은 3~10% 정도이며, 주로 빛의 손실이 생기는 부분은 도광판, 편광기, 및 색필터 등이 있다. The efficiency of light in a conventional liquid crystal display (LCD) is about 3 to 10%, and light loss mainly occurs in a light guide plate, a polarizer, and a color filter.
따라서, 이러한 빛의 손실을 최소화하면서 제조원가를 절감시킬 수 있는 방향으로 디스플레이의 개발이 진행되고 있으며, 특히 빛을 효과적으로 전면으로 투과하는 도광판의 개발이 활발하게 진행되고 있다.Therefore, displays are being developed in a direction capable of reducing manufacturing costs while minimizing the loss of light.
그러나, 도광판의 상부에 설치되는 확산시트, 프리즘시트, DBEF(Dual Brightness Enhancement Film) 시트들이 통합 또는 탈착되는 추세이며. 이에 따라 도광판 내의 결정들의 시인성이 점점 증가하는 추세이다.However, there is a tendency for diffusion sheets, prism sheets, and DBEF (Dual Brightness Enhancement Film) sheets installed on the light guide plate to be integrated or detached. Accordingly, the visibility of the crystals in the light guide plate is gradually increasing.
도광판의 패턴 형성 공법이 Roll Stamping 공법으로 변함에 따라 패턴의 크기가 결점에 대비하여 매우 미세하게 형성되고 결점에 대한 도광판의 취약성이 더 증가하게 되었다.As the pattern formation method of the light guide plate has changed to the roll stamping method, the size of the pattern is formed very finely in preparation for defects, and the vulnerability of the light guide plate to defects has increased.
이러한 과다한 결점의 시인성은 도광판의 불량률을 증가시켜 조립공정의 효율성을 저하시키고 디스플레이의 화질을 저하시킬 수 있다.The visibility of such excessive defects may increase the defect rate of the light guide plate, reduce the efficiency of the assembly process, and deteriorate the image quality of the display.
종래의 백라이트 장치는 도광판, 도광판의 하부에 설치된 반사시트, 도광판의 상부에 설치된 QD 시트, 확산 시트, 프리즘 시트, DBED 시트, 및 도광판의 일 측면에 설치된 광원을 포함할 수 있다.A conventional backlight device may include a light guide plate, a reflective sheet installed under the light guide plate, a QD sheet installed above the light guide plate, a diffusion sheet, a prism sheet, a DBED sheet, and a light source installed on one side of the light guide plate.
여기서, 도광판은 광을 투과시킬 수 있는 투과성 재료중의 하나인 아크릴계 투명수지인 PMMA(Poly Methylmethacrylate), MS(Methylmethacrlate Styrens) 혹은 PS(Poly Styrene), PC(Poly Carbonate), PET(polyethylene terephthalate) 등과 같은 플라스틱(Plastic)이나 수지(Resin)로 형성될 수 있다. Here, the light guide plate is made of PMMA (Poly Methylmethacrylate), MS (Methylmethacrlate Styrens), PS (Poly Styrene), PC (Poly Carbonate), PET (polyethylene terephthalate), etc. It can be made of the same plastic or resin.
또한, 도광판은 내부의 일 측면에 소정 형태의 패턴을 포함한다. 패턴은 외부의 광원에서 방출된 빛의 수평 방향과 수직 방향으로, 원형, 타원, 및 세로 막대기 형태의 패턴이 일정한 간격 혹은 랜덤한 간격을 두고 복수개 형성되어 있다.In addition, the light guide plate includes a pattern of a predetermined shape on one side of the inside. In the pattern, a plurality of circular, elliptical, and vertical bar patterns are formed at regular or random intervals in the horizontal and vertical directions of light emitted from an external light source.
외부의 광원에서 방출된 빛은 도광판에 입사한 후 패턴에 의해 일부는 도광판 외부로 출사되지만, 일부 결점은 패턴과 유사한 역할을 하여 마찬가지로 외부로 출사 된다. 결점에 의해 출사된 빛의 일부는 패턴 보다 더 큰 세기의 빛으로 출사되어 전체적으로 균일한 면광원을 요하는 백라이트에서 눈에 띄는 광의 불균일 부위가 육안으로 시인할 수 있게 된다. After the light emitted from the external light source is incident on the light guide plate, a part of it is emitted to the outside of the light guide plate by the pattern, but some defects play a role similar to the pattern and are likewise emitted to the outside. A part of the light emitted by the defect is emitted as light having a higher intensity than the pattern, so that a light non-uniformity region that is noticeable in a backlight requiring a uniform surface light source as a whole can be visually recognized.
이로 인해, 종래 기술은 결점에서 발생한 불균일 현상으로 인해 액정 화면의 국소 일부 영역이 밝아져 전체적으로 균일한 외관을 나타내지 못하는 문제가 있다.Due to this, the prior art has a problem in that a partial area of the liquid crystal screen is brightened due to a non-uniformity phenomenon generated from the defect, so that the overall appearance is not uniform.
[선행기술문헌][Prior art literature]
[특허문헌][Patent Literature]
(특허문헌 1) 한국등록특허공보 제10-1158524호(2012.06.21)(Patent Document 1) Korea Patent Registration No. 10-1158524 (2012.06.21)
본 발명은, 도광판에 형성되는 기존 패턴을 밀집하여 위치를 제어함에 따라 결점으로 형성된 불균일한 시인성을 최소화할 수 있는 하이브리드 패턴을 이용한 도광판 및 이를 포함하는 디스플레이 장치를 제공할 수 있다.The present invention can provide a light guide plate using a hybrid pattern capable of minimizing non-uniform visibility formed as defects by densely controlling existing patterns formed on the light guide plate and a display device including the same.
본 발명의 일 측면에 따른 하이브리드 패턴을 이용한 도광판은 측면의 광입사면으로부터 입사된 광원을 전면으로 분산하는 도트패턴이 상기 전면과 대향하는 면에 소정개수로 밀집되어 형성되되, 상기 광입사면을 기준으로 횡방향 및 종방향에 대하여 이격간격이 동일한 정밀배열 및 이격간격이 랜덤한 랜덤배열 중 어느 하나의 배열로 구비되는 복수의 도트그룹; 및 상기 도트그룹의 이격 공간 사이에 마련되어 각 도트그룹 사이로 입사되는 광원을 다방향으로 분산하는 광분산 도트를 포함할 수 있다.In the light guide plate using a hybrid pattern according to one aspect of the present invention, a dot pattern for dispersing light incident from a light incident surface on a side surface to the front surface is densely formed in a predetermined number on a surface facing the front surface, and the light incident surface a plurality of dot groups provided in any one of a precise arrangement having the same spacing in the horizontal and vertical directions and a random arrangement in which the spacing is random; and light dispersion dots provided between the spaced apart spaces of the dot groups to multi-directionally disperse light sources incident between the respective dot groups.
바람직하게는, 상기 광분산 도트는 일방향에 대하여 등간격일 수 있다.Preferably, the light dispersion dots may be equally spaced in one direction.
바람직하게는, 상기 광분산 도트는 랜덤한 위치에 형성될 수 있다.Preferably, the light dispersion dots may be formed at random positions.
바람직하게는, 상기 광분산 도트는 일방향에 대하여 동일선상이되 이격 간격이 랜덤하게 형성될 수 있다.Preferably, the light dispersion dots are collinear in one direction, but spaced apart from each other may be randomly formed.
바람직하게는, 상기 광분산 도트는 각 일방향에 대하여 서로 지그재그일 수 있다.Preferably, the light dispersion dots may be zigzag with each other in one direction.
바람직하게는, 상기 광분산 도트는 입사된 광원을 상기 도트패턴보다 넓은 각도로 분산될 수 있다.Preferably, the light dispersion dots may disperse the incident light source at a wider angle than the dot pattern.
바람직하게는, 상기 도트그룹 및 광분산 도트는 인쇄 기법, 사출 기법, 임프린팅 기법, 레이저가공 기법, V커팅 기법, 및 스탬프 기법 중 어느 하나의 기법으로 형성될 수 있다.Preferably, the dot groups and light dispersion dots may be formed by any one of a printing technique, an injection technique, an imprinting technique, a laser processing technique, a V-cutting technique, and a stamp technique.
바람직하게는, 상기 도트그룹 및 광분산 도트는 다각형, 원형, 타원형 중 어느 하나의 형태로 형성될 수 있다.Preferably, the dot groups and the light dispersion dots may be formed in any one of a polygonal shape, a circular shape, and an elliptical shape.
바람직하게는, 상기 광분산 도트는 분포밀도가 각 일방향마다 변경될 수 있다.Preferably, the distribution density of the light dispersion dots may be changed in each direction.
바람직하게는, 하이브리드 패턴을 이용한 도광판을 포함하는 디스플레이 장치일 수 있다.Preferably, it may be a display device including a light guide plate using a hybrid pattern.
본 발명에 따르면, 도광판 형성되는 패턴을 조절함에 따라 액정 화면에 빛이 균일하게 도달할 수 있도록 하고, 대형 도광판 양산 시 결점을 최소화하여 디스플레이의 품질 및 생산성을 향상시킬 수 있다.According to the present invention, by controlling the pattern formed on the light guide plate, the light can reach the liquid crystal screen uniformly, and the quality and productivity of the display can be improved by minimizing defects in mass production of the large light guide plate.
도 1은 일 실시예에 따른 하이브리드 패턴을 이용한 도광판을 나타낸 구성도이다.1 is a configuration diagram illustrating a light guide plate using a hybrid pattern according to an exemplary embodiment.
도 2는 일 실시예에 따른 빛의 분산 원리를 계략적으로 나타낸 도이다.2 is a diagram schematically illustrating a light dispersion principle according to an exemplary embodiment.
도 3은 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제1 단면도이다.3 is a first cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 4는 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제2 단면도이다.4 is a second cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 5는 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제3 단면도이다.5 is a third cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 6는 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제1 단면도이다.6 is a first cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 7은 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제2 단면도이다.7 is a second cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 8은 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제3 단면도이다.8 is a third cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 9는 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제1 단면도이다.9 is a first cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 10은 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제2 단면도이다.10 is a second cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 11은 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제3 단면도이다.11 is a third cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 12은 일 실시예에 따른 도트그룹 및 광분산 도트의 배치를 적용한 도광판의 외관상태를 나타낸 도이다.12 is a diagram illustrating an appearance state of a light guide plate to which an arrangement of dot groups and light dispersion dots according to an exemplary embodiment is applied.
이하에서는 본 발명에 따른 하이브리드 패턴을 이용한 도광판 및 이를 포함하는 디스플레이 장치를 첨부된 도면들을 참조하여 상세하게 설명한다. 이러한 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.Hereinafter, a light guide plate using a hybrid pattern according to the present invention and a display device including the same will be described in detail with reference to the accompanying drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to an operator's intention or practice. Therefore, definitions of these terms will have to be made based on the content throughout this specification.
본 발명의 목적 및 효과는 하기의 설명에 의해서 자연스럽게 이해되거나 보다 분명해질 수 있으며, 하기의 기재만으로 본 발명의 목적 및 효과가 제한되는 것은 아니다. 또한, 본 발명을 설명함에 있어서 본 발명과 관련된 공지 기술에 대한 구체적인 설명이, 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략하기로 한다.The objects and effects of the present invention can be naturally understood or more clearly understood by the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.
도 1은 일 실시예에 따른 하이브리드 패턴을 이용한 도광판을 나타낸 구성도이다.1 is a configuration diagram illustrating a light guide plate using a hybrid pattern according to an exemplary embodiment.
도 1에서 나타낸 바와 같이, 일 실시예에 따른 하이브리드 패턴을 이용한 도광판(100)은 도트그룹(20) 및 광분산 도트(30)를 포함할 수 있다.As shown in FIG. 1 , a light guide plate 100 using a hybrid pattern according to an exemplary embodiment may include a dot group 20 and light dispersion dots 30 .
도트그룹(20)은 측면의 광입사면으로부터 입사된 광원(40)을 전면으로 분산하는 도트패턴(10)이 상기 전면과 대향하는 면에 소정개수로 밀집되어 형성될 수 있다.The dot group 20 may be formed by densely concentrating a predetermined number of dot patterns 10 on a surface facing the front surface to disperse the light source 40 incident from the light incident surface on the side to the front surface.
광분산 도트(30)는 상기 도트그룹(20)의 이격 공간 사이에 마련되어 각 도트그룹(20) 사이로 입사되는 광원(40)을 다방향으로 분산할 수 있다.The light dispersion dots 30 are provided between the spaced apart spaces of the dot groups 20 and can disperse the light sources 40 incident between the respective dot groups 20 in multiple directions.
여기서, 광 분산 도트는 일방향에 대하여 등간격일 수 있고, 랜덤한 위치에 형성될 수 있으며, 일방향에 대하여 동일선상이되 이격 간격이 랜덤하게 형성될 수 있다. 이때, 광분산 도트(30)는 각 일방향에 대하여 서로 지그재그일 수 있다.Here, the light dispersion dots may be spaced at equal intervals in one direction, may be formed at random positions, and may be formed on the same line in one direction but at random intervals. In this case, the light dispersion dots 30 may be zigzag with each other in one direction.
또한, 광분산 도트(30)는 입사된 광원(40)이 상기 도트패턴(10)보다 넓은 각도로 분산될 수 있으며, 광분산 도트(30)는 분포밀도가 각 일방향마다 변경될 수 있다.In addition, the light dispersion dots 30 can disperse the incident light source 40 at a wider angle than the dot pattern 10, and the distribution density of the light dispersion dots 30 can be changed in each direction.
도트그룹(20) 및 광분산 도트(30)는 인쇄기법, 사출기법, 임프린팅 기법, 레이저가공 기법, V커팅 기법, 및 스탬프 기법 중 어느 하나의 기법으로 형성될 수 있고, 도트그룹(20) 및 광분산 도트(30)는 다각형, 원형, 타원형 중 어느 하나의 형태로 형성될 수 있으나, 각 도트그룹(20) 및 광분산 도트(30)가 반드시 상술한 기법 및 형태에 한정되는 것은 아니다.The dot group 20 and the light dispersion dots 30 may be formed by any one of a printing technique, an injection technique, an imprinting technique, a laser processing technique, a V-cutting technique, and a stamp technique, and the dot group 20 And the light dispersion dots 30 may be formed in any one of polygonal, circular, and elliptical shapes, but each dot group 20 and the light dispersion dots 30 are not necessarily limited to the above-described technique and shape.
앞서 상술한 특징으로 가지는 도광판(100)을 포함하는 디스플레이 장치가 제조될 수 있으며, 디스플레이 장치의 구체적인 구성요소는 한정하지 아니한다.A display device including the light guide plate 100 having the aforementioned characteristics may be manufactured, and specific components of the display device are not limited.
도 2는 일 실시예에 따른 빛의 분산 원리를 계략적으로 나타낸 도이다.2 is a diagram schematically illustrating a light dispersion principle according to an exemplary embodiment.
도 2에서 나타낸 바와 같이, 일 실시예에 따른 빛의 분산 원리는 측면으로부터 입사된 광원(40)이 도광판(100)의 일측면에 마련된 도트패턴(10)에 의해 입사된 광원(40)이 다방향으로 분산될 수 있다. 이때, 도트패턴(10)의 밀집도가 높을수록 광원(40)의 분산정도가 비례하여 증가함에 따라 도트패턴(10)이 밀집된 도트그룹(20)이 위치하는 전면부분에 방출되는 광량이 증가하게 된다. 단, 도트그룹(20)이 위치한 전면부분에 방출되는 광량이 증가하더라도 도트그룹(20)의 이격 거리만큼 광원(40)의 방출량이 감소할 수 있다.As shown in FIG. 2 , according to the light dispersion principle according to an embodiment, the light source 40 incident from the side is the light source 40 incident by the dot pattern 10 provided on one side of the light guide plate 100. can be distributed in either direction. At this time, as the degree of dispersion of the light source 40 increases proportionally as the density of the dot pattern 10 increases, the amount of light emitted to the front portion where the dot group 20 in which the dot pattern 10 is densely located increases. . However, even if the amount of light emitted from the front portion where the dot group 20 is located increases, the amount of light emitted from the light source 40 may decrease by the distance between the dot groups 20 .
도 3 내지 도 5는 일 실시예에 따른 도트그룹(20)이 정밀배열로 구비된 도광판(100)에서 광분산 도트(30)를 배치별로 나타낸 단면도이다.3 to 5 are cross-sectional views illustrating the light dispersion dots 30 arranged by arrangement in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an exemplary embodiment.
도 3은 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제1 단면도이다.3 is a first cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 3에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 동일하게 구비되되, 광원(40)이 입사되는 면을 기준으로 각 종방향에 대하여 등간격으로 구비된 도토그룹이 서로 지그재그 형태로 구비될 수 있다.As shown in FIG. 3 , in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an embodiment, the dot groups 20 are equally spaced apart, but the light source 40 is incident on the surface. As a reference, potting soil groups provided at equal intervals in each longitudinal direction may be provided in a zigzag form.
이때, 광분산 도트(30)는 종방향으로 구비된 각 도트그룹(20)들 사이에 등간격으로 구비될 수 있다. 광분산 도트(30)는 이격 간격이 변경될 수 있으며, 변경되어 구비되더라도 등간격일 수 있다. 또한, 일 실시예에 따른 도트그룹(20)이 정밀배열인 도광판(100)은 광원(40)이 입사되는 면을 기준으로 각 종방향에 대하여 등간격으로 구비된 도트그룹(20)들 사이에 광분산 도트(30)가 구비되나, 이에 한정되지 아니하고, 각 도트그룹(20)들의 이격된 공간 사이에 광분산 도트(30)가 구비될 수 있다.In this case, the light dispersion dots 30 may be provided at equal intervals between each dot group 20 provided in the longitudinal direction. The spaced intervals of the light dispersion dots 30 may be changed, and even if they are provided with a change, they may be equally spaced. In addition, in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an embodiment, between the dot groups 20 provided at equal intervals in each longitudinal direction based on the surface on which the light source 40 is incident, The light dispersion dots 30 are provided, but are not limited thereto, and the light dispersion dots 30 may be provided between spaced apart spaces of each dot group 20 .
도 4와 도 5는 도 3에서 상술한 제1 단면도의 도트그룹(20)이 정밀배열인 도광판(100)을 바탕으로 설명한다.4 and 5 will be described based on the light guide plate 100 in which the dot groups 20 of the first cross-sectional view described in FIG. 3 are precisely arranged.
도 4는 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제2 단면도이다.4 is a second cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 4에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 동일하게 구비되고, 광분산 도트(30)는 각 도트그룹(20)들 사이에 랜덤 간격으로 구비될 수 있다.As shown in FIG. 4 , in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an embodiment, the dot groups 20 are equally spaced apart, and the light dispersion dots 30 are each dot. It may be provided at random intervals between the groups 20 .
도 5는 일 실시예에 따른 도트그룹이 정밀배열인 도광판의 제3 단면도이다.5 is a third cross-sectional view of a light guide plate in which dot groups are precisely arranged according to an exemplary embodiment.
도 5에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 동일하게 구비되고, 광분산 도트(30)는 종방향으로 구비된 각 도트그룹(20)들 사이에 동일선산으로 구비되되, 이격 간격이 랜덤한 형태로 구비될 수 있다. As shown in FIG. 5 , in the light guide plate 100 in which the dot groups 20 are precisely arranged according to an exemplary embodiment, the dot groups 20 are equally spaced apart, and the light dispersion dots 30 are arranged in the vertical direction. It is provided on the same line between each dot group 20 provided, but the spacing may be provided in a random form.
이때, 광분산 도트(30)의 랜덤한 이격 간격은 기 설정된 패턴 수 이후에 이격 간격을 랜덤하게 조정할 수 있다. 또한, 광입사면을 기준으로 횡방향에 대하여 동일선상으로 구비되되, 랜덤 간격으로 구비할 광분산 도트(30)의 개수를 설정하여 각 횡방향으로 구비된 광분산 도트(30)들의 이격 간격을 설정할 수 있다.In this case, the random spacing of the light dispersion dots 30 may be randomly adjusted after a predetermined number of patterns. In addition, the number of light dispersion dots 30 provided on the same line in the horizontal direction based on the light incident surface, but provided at random intervals, is set to determine the spacing between the light dispersion dots 30 provided in each horizontal direction. can be set
도 6 내지 도 8는 일 실시예에 따른 도트그룹(20)이 랜덤배열로 구비된 도광판(100)에서 광분산 도트(30)의 배치별로 나타낸 단면도다.6 to 8 are cross-sectional views of each arrangement of the light dispersion dots 30 in the light guide plate 100 in which the dot groups 20 are randomly arranged according to an exemplary embodiment.
도 6는 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제1 단면도이다.6 is a first cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 6에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 랜덤배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 랜덤하게 구비될 수 있다. 이때, 광분산 도트(30)는 광원(40)이 입사되는 면을 기준으로 각 종방향에 대하여 등간격으로 구비될 수 있다. 이때, 랜덤하게 구비된 도트그룹(20)들에 의해 일방향에 대하여 동일선상으로 구비된 광분산 도트(30)가 불연속적으로 배치될 수 있다.As shown in FIG. 6 , in the light guide plate 100 in which the dot groups 20 are randomly arranged according to an exemplary embodiment, the spacing between the respective dot groups 20 may be randomly provided. In this case, the light dispersion dots 30 may be provided at equal intervals in each longitudinal direction based on the surface on which the light source 40 is incident. At this time, the light dispersion dots 30 provided on the same line in one direction may be discontinuously arranged by the randomly provided dot groups 20 .
도 7과 도 8은 도 6에서 상술한 제1 단면도의 도트그룹(20)이 랜덤배열인 도광판(100)을 바탕으로 설명한다.7 and 8 will be described based on the light guide plate 100 in which the dot groups 20 of the first cross-sectional view described in FIG. 6 are randomly arranged.
도 7은 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제2 단면도이다.7 is a second cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 7에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 랜덤배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 랜덤하게 구비되고, 각 도트그룹(20)들 사이에 구비된 광분산 도트(30)들의 이격 간격이 랜덤하게 구비될 수 있다. As shown in FIG. 7 , in the light guide plate 100 in which the dot groups 20 are randomly arranged according to an exemplary embodiment, the spacing between the respective dot groups 20 is provided at random, and the dot groups 20 are spaced apart at random. Separation intervals of the provided light dispersion dots 30 may be provided randomly.
도 8은 일 실시예에 따른 도트그룹이 랜덤배열인 도광판의 제3 단면도이다.8 is a third cross-sectional view of a light guide plate in which dot groups are randomly arranged according to an exemplary embodiment.
도 8에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 랜덤배열인 도광판(100)은 각 도트그룹(20)들의 이격 간격이 랜덤하게 구비될 수 있다. 이때, 광분산 도트(30)는 광원(40)이 입사되는 면을 기준으로 종방향에 대하여 동일선상으로 구비되되, 각 광분산 도트(30)의 이격 간격이 랜덤하게 구비될 수 있다.As shown in FIG. 8 , in the light guide plate 100 in which the dot groups 20 are randomly arranged according to an exemplary embodiment, the dot groups 20 may be spaced at random intervals. In this case, the light dispersion dots 30 are provided on the same line in the longitudinal direction with respect to the surface on which the light source 40 is incident, and the distances between the light dispersion dots 30 may be randomly provided.
이때, 광분산 도트(30)의 랜덤한 이격 간격은 기 설정된 패턴 수 이후에 이격 간격을 랜덤하게 조정할 수 있다. 또한, 광입사면을 기준으로 횡방향에 대하여 동일선상으로 구비되되, 랜덤 간격으로 구비할 광분산 도트(30)의 개수를 설정하여 각 횡방향으로 구비된 광분산 도트(30)들의 이격 간격을 설정할 수 있다.In this case, the random spacing of the light dispersion dots 30 may be randomly adjusted after a predetermined number of patterns. In addition, the number of light dispersion dots 30 provided on the same line in the horizontal direction based on the light incident surface, but provided at random intervals, is set to determine the spacing between the light dispersion dots 30 provided in each horizontal direction. can be set
도 9 내지 도 11은 일 실시예에 따른 도트그룹(20)이 정밀배열과 랜덤배열로 구비된 도광판(100)에서 광분산 도트(30)의 배치별로 나타낸 단면도다.9 to 11 are cross-sectional views of each arrangement of the light dispersion dots 30 in the light guide plate 100 in which the dot groups 20 are arranged in precise and random arrangements according to an exemplary embodiment.
도 9는 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제1 단면도이다.9 is a first cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 9에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열과 랜덤배열로 구비된 도광판(100)은 제1행과 제2행을 제1행그룹(51)으로 묶고 제3행과 제4행을 제2행그룹(52)으로 묶어 도트그룹(20)의 배치를 행그룹(50)별로 변경하여 구비할 수 있다. As shown in FIG. 9 , in the light guide plate 100 in which dot groups 20 are arranged in precise and random arrangements according to an embodiment, the first and second rows are grouped into a first row group 51 and a third Rows and the fourth row may be grouped into the second row group 52 and the arrangement of the dot groups 20 may be changed for each row group 50 .
즉, 일 실시예에 따른 제1행그룹(51)의 제1행과 제2행이 정밀배열이면 제2행그룹(52)의 제3행과 제4행은 랜덤배열일 수 있고, 제1행과 제2행의 정밀배열은 등간격이나 각 행의 배열은 서로 지그재그 형태일 수 있고, 제3행과 제4행의 랜덤배열은 각 행에 대하여 동일선상이나 도트그룹(20)의 이격 간격이 랜덤하게 구비될 수 있다.That is, if the first row and the second row of the first row group 51 according to an embodiment are precise arrangements, the third row and fourth row of the second row group 52 may be random arrangements. The precise arrangement of the rows and the second row may be equally spaced, but the arrangement of each row may be zigzag, and the random arrangement of the third and fourth rows may be on the same line with respect to each row or the spacing of the dot groups 20 This may be provided randomly.
이때, 광분산 도트(30)는 각 행 및 각 행그룹(50) 사이에 일방향에 대하여 등간격으로 구비될 수 있다. 또한, 광분산 도트(30)는 일방향으로 구비된 각각의 광분산 도트(30)들의 배치가 지그재그 형태일 수 있다.In this case, the light dispersion dots 30 may be provided at regular intervals in one direction between each row and each row group 50 . In addition, the light dispersion dots 30 may have a zigzag arrangement of each of the light dispersion dots 30 provided in one direction.
도 10과 도 11은 도 9에서 상술한 제1 단면도의 도트그룹(20)이 정밀배열과 랜덤배일로 구비된 도광판(100)을 바탕으로 설명한다.10 and 11 will be described based on the light guide plate 100 provided with the dot groups 20 of the first cross-sectional view described in FIG. 9 in precise and random arrangements.
도 10은 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제2 단면도이다.10 is a second cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 10에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열과 랜덤배열로 구비된 도광판(100)은 앞서 상술한 바와 같이, 각 행그룹(50)이 정밀배열과 랜덤배열 중 어느 하나의 형태로 구비되고, 광분산 도트(30)는 각 행 및 각 행그룹(50) 사이 또는 주변에 랜덤하게 구비될 수 있다.As shown in FIG. 10 , in the light guide plate 100 in which dot groups 20 are arranged in precise and random arrangements according to an embodiment, as described above, each row group 50 is arranged in precise and random arrangements. It is provided in one form, and the light dispersion dots 30 may be randomly provided between or around each row and each row group 50 .
도 11은 일 실시예에 따른 도트그룹이 정밀배열과 랜덤배열로 구비된 도광판의 제3 단면도이다.11 is a third cross-sectional view of a light guide plate in which dot groups are arranged in precise and random arrangements according to an exemplary embodiment.
도 11에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20)이 정밀배열과 랜던배열로 구비된 도광판(100)은 각 행그룹(50)이 정밀배열과 랜덤배열 중 어느 하나의 형태로 구비되고, 광분산 도트(30)는 각 행 및 각 행그룹(50) 사이에 일방향으로 구비되되, 각 광분산 도트(30)의 이격 간격이 랜덤하게 구비될 수 있다.As shown in FIG. 11 , in the light guide plate 100 in which the dot groups 20 are arranged in precise and random arrangements according to an embodiment, each row group 50 is provided in either a precise arrangement or a random arrangement. In addition, the light dispersion dots 30 are provided in one direction between each row and each row group 50, and the distance between each light dispersion dot 30 may be provided at random.
도 12은 일 실시예에 따른 도트그룹 및 광분산 도트의 배치를 적용한 도광판의 외관상태를 나타낸 도이다.12 is a diagram illustrating an appearance state of a light guide plate to which an arrangement of dot groups and light dispersion dots according to an exemplary embodiment is applied.
도 12에서 나타낸 바와 같이, 일 실시예에 따른 도트그룹(20) 및 광분산 도트(30)의 배치를 적용한 도광판(100)의 외관 상태는 (a)일반 도트패턴(10)을 적용한 도광판(100)이고, (b)하이브리드 패턴을 적용한 도광판(100)을 나타낸 것이다. 여기서, 하이브리드 패턴을 적용한 도광판(100)이 더 많은 광원(40)을 분산함에 따라 결점(A1) 및 스크래치(A2)가 사라진 것을 확인할 수 있다.As shown in FIG. 12, the appearance state of the light guide plate 100 to which the arrangement of the dot groups 20 and the light dispersion dots 30 according to an embodiment is applied is (a) the light guide plate 100 to which the general dot pattern 10 is applied. ), and (b) shows the light guide plate 100 to which the hybrid pattern is applied. Here, as the light guide plate 100 to which the hybrid pattern is applied disperses more light sources 40, it can be seen that the defect A1 and the scratch A2 have disappeared.
이상에서 대표적인 실시예를 통하여 본 발명을 상세하게 설명하였으나, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자는 상술한 실시예에 대하여 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 가능함을 이해할 것이다. 그러므로 본 발명의 권리 범위는 설명한 실시예에 국한되어 정해져서는 안 되며, 후술하는 특허청구범위뿐만 아니라 특허청구범위와 균등 개념으로부터 도출되는 모든 변경 또는 변형된 형태에 의하여 정해져야 한다. Although the present invention has been described in detail through representative embodiments, those skilled in the art will understand that various modifications are possible to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by all changes or modifications derived from the claims and equivalent concepts as well as the claims to be described later.
[부호의 설명][Description of code]
100: 도광판 10: 도트패턴100: light guide plate 10: dot pattern
20: 도트그룹 30: 광분산 도트20: dot group 30: light dispersion dot
40: 광원 50: 행그룹40: light source 50: row group
51: 제1행그룹 52: 제2행그룹51: first row group 52: second row group
A1: 결점 A2: 스크래치A1: Flaw A2: Scratches

Claims (10)

  1. 측면의 광입사면으로부터 입사된 광원을 전면으로 분산하는 도트패턴이 상기 전면과 대향하는 면에 소정개수로 밀집되어 형성되되, 상기 광입사면을 기준으로 횡방향 및 종방향에 대하여 이격간격이 동일한 정밀배열 및 이격간격이 랜덤한 랜덤배열 중 어느 하나의 배열로 구비되는 복수의 도트그룹; 및A dot pattern for dispersing light incident from the light incident surface on the side to the front surface is formed densely in a predetermined number on the surface facing the front surface, and the spacing is the same in the horizontal and vertical directions based on the light incident surface A plurality of dot groups provided in any one of a precise arrangement and a random arrangement with a random spacing; and
    상기 도트그룹의 이격 공간 사이에 마련되어 각 도트그룹 사이로 입사되는 광원을 다방향으로 분산하는 광분산 도트를 포함하는 하이브리드 패턴을 이용한 도광판.A light guide plate using a hybrid pattern including light dispersion dots provided between spaced apart spaces of the dot groups and dispersing light incident between each dot group in multiple directions.
  2. 제1항에 있어서,According to claim 1,
    상기 광분산 도트는 일방향에 대하여 등간격인 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the light dispersion dots are equally spaced in one direction.
  3. 제2항에 있어서,According to claim 2,
    상기 광분산 도트는 각 일방향에 대하여 서로 지그재그인 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the light dispersion dots are zigzag with each other in one direction.
  4. 제1항에 있어서,According to claim 1,
    상기 광분산 도트는 랜덤한 위치에 형성되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the light dispersion dots are formed at random positions.
  5. 제1항에 있어서,According to claim 1,
    상기 광분산 도트는 일방향에 대하여 동일선상이되 이격 간격이 랜덤하게 형성되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the light dispersion dots are collinear in one direction but spaced apart at random.
  6. 제1항에 있어서, According to claim 1,
    상기 광분산 도트는 입사된 광원이 상기 도트패턴보다 넓은 각도로 분산되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light-dispersion dots light guide plate using a hybrid pattern, characterized in that the incident light source is dispersed at a wider angle than the dot pattern.
  7. 제1항에 있어서, According to claim 1,
    상기 도트그룹 및 광분산 도트는 인쇄 기법, 사출 기법, 임프린팅 기법, 레이저가공 기법, V커팅 기법, 및 스탬프 기법 중 어느 하나의 기법으로 형성되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the dot group and the light dispersion dots are formed by any one of a printing technique, an injection technique, an imprinting technique, a laser processing technique, a V-cutting technique, and a stamp technique.
  8. 제1항에 있어서,According to claim 1,
    상기 도트그룹 및 광분산 도트는 다각형, 원형, 타원형 중 어느 하나의 형태로 형성되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the dot group and the light dispersion dot are formed in any one of a polygonal shape, a circular shape, and an elliptical shape.
  9. 제1항에 있어서,According to claim 1,
    상기 광분산 도트는 분포밀도가 각 일방향마다 변경되는 것을 특징으로 하는 하이브리드 패턴을 이용한 도광판.The light guide plate using a hybrid pattern, characterized in that the distribution density of the light dispersion dots is changed in each one direction.
  10. 제1항 내지 제9항 중 어느 한 항에 따른 하이브리드 패턴을 이용한 도광판을 포함하는 디스플레이 장치.A display device comprising a light guide plate using the hybrid pattern according to any one of claims 1 to 9.
PCT/KR2022/019646 2021-12-10 2022-12-05 Light guide plate using hybrid pattern and display device including same WO2023106775A1 (en)

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KR20080000408A (en) * 2006-06-27 2008-01-02 엘지.필립스 엘시디 주식회사 Back light assembly and liquid crystal display device having the same
KR101010984B1 (en) * 2010-05-10 2011-01-26 레이젠 주식회사 Light guide plate having complex pattern and manufacturing method thereof
JP2012048914A (en) * 2010-08-25 2012-03-08 Seiko Instruments Inc Lighting device and liquid crystal display using the same
JP2018156871A (en) * 2017-03-17 2018-10-04 パナソニックＩｐマネジメント株式会社 Light guide plate and illuminating device
JP2019160511A (en) * 2018-03-12 2019-09-19 パナソニックＩｐマネジメント株式会社 Light guide plate and lighting device

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Publication number Priority date Publication date Assignee Title
KR101158524B1 (en) 2005-07-18 2012-06-21 에스엘 주식회사 Light guide panel maked pattern dispersed reflection

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Publication number Priority date Publication date Assignee Title
KR20080000408A (en) * 2006-06-27 2008-01-02 엘지.필립스 엘시디 주식회사 Back light assembly and liquid crystal display device having the same
KR101010984B1 (en) * 2010-05-10 2011-01-26 레이젠 주식회사 Light guide plate having complex pattern and manufacturing method thereof
JP2012048914A (en) * 2010-08-25 2012-03-08 Seiko Instruments Inc Lighting device and liquid crystal display using the same
JP2018156871A (en) * 2017-03-17 2018-10-04 パナソニックＩｐマネジメント株式会社 Light guide plate and illuminating device
JP2019160511A (en) * 2018-03-12 2019-09-19 パナソニックＩｐマネジメント株式会社 Light guide plate and lighting device

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