WO2016159563A1 - 광학시트 및 이를 구비한 백라이트 유닛 - Google Patents
광학시트 및 이를 구비한 백라이트 유닛 Download PDFInfo
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- WO2016159563A1 WO2016159563A1 PCT/KR2016/002952 KR2016002952W WO2016159563A1 WO 2016159563 A1 WO2016159563 A1 WO 2016159563A1 KR 2016002952 W KR2016002952 W KR 2016002952W WO 2016159563 A1 WO2016159563 A1 WO 2016159563A1
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- sheet
- prism sheet
- protrusion
- prism
- diffusion
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- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- 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
-
- 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
-
- 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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- 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
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Definitions
- the present application relates to an optical sheet, and more particularly, to an optical sheet having improved optical properties and minimizing surface spots.
- liquid crystal display requires a backlight module that provides uniform light to the entire screen, unlike the conventional CRT.
- FIG. 1 is an exploded perspective view showing a conventional backlight module.
- a conventional backlight module includes a lamp 1 and a lamp reflector for reflecting light of the lamp 1 to convert the light from the lamp 1 into a surface light source. It is disposed on one side, and the reflective sheet 3 for preventing the leakage of light is disposed under the light guide plate (2).
- the light guide plate 3 has a diffusion sheet 4 for uniformly diffusing light, and thereon a prism sheet part having a plurality of triangular linear prisms projecting upwards to collect scattered light. 5) lies.
- the prism sheet part 5 has a plurality of linear prisms arranged to collect light, and a protective sheet 6 is disposed on the prism sheet part 5 to prevent defects such as scratching of the prism shape and nailing by foreign matter. do.
- the prism sheet portion 5 may be composed of two sheets, the first prism sheet 51 and the second prism sheet 52.
- a plurality of prisms 53 are arranged in parallel on one surface of the first prism sheet 51, and a plurality of prisms 54 are arranged on one surface of the second prism sheet 52 to form a prism of the first prism sheet 51.
- 53) are arranged in a direction orthogonal to each other to condense light in different directions to increase the light collection efficiency.
- Patent Document 1 Korea Patent Publication 10-2013-0107645
- the present invention has been made to solve the above problems, and an object thereof is to provide an optical sheet capable of further improving optical characteristics such as luminance.
- the first prism sheet and a plurality of prisms parallel to the first direction formed on one surface thereof are located on the side of the light incident side of the first prism sheet,
- An optical sheet including a diffusion sheet having a plurality of protrusions formed on a surface facing the first prism sheet is provided.
- the second prism sheet may further include a second prism sheet positioned on a surface of the first prism sheet from which light is emitted and in which a plurality of prisms parallel to each other are formed on one surface of the first prism sheet.
- the protrusion may include a plurality of first protrusions formed on a surface facing the first prism sheet and a second protrusion formed at a height higher than the first protrusion on the surface facing the first prism sheet.
- the second protrusion may be made of an adhesive material, and may be formed to adhesively fix the first prism sheet and the diffusion sheet.
- An air layer may be formed between the diffusion sheet and the first prism sheet between the first protrusion and the first prism sheet.
- the width of the second protrusion may be formed to be narrower than the width of the first protrusion.
- the end of the second protrusion may be sharply formed in the form of a tip.
- Unevenness may be formed on a surface on which the light of the first prism sheet is incident.
- the unevenness may be formed of an adhesive material, and may be formed to adhesively fix the first prism sheet and the diffusion sheet by contacting with the second protrusion to fix the second protrusion.
- the thickness of the air layer may be 5 ⁇ 10 ⁇ m.
- a backlight unit having the above-described optical sheet may be provided.
- the area where the diffusion sheet and the prism sheet contact each other is minimized, so that spots such as spots on the diffusion sheet can be minimized.
- FIG. 1 is an exploded perspective view showing a conventional backlight module
- FIG. 2 is an enlarged perspective view of the prism sheet part and the diffusion sheet of FIG. 1;
- FIG. 3 is an enlarged perspective view of a first prism sheet and a diffusion sheet according to an embodiment of the present invention
- FIG. 4 is a perspective view illustrating a form in which a second prism sheet is added to FIG. 3;
- FIG. 5 is a side view of FIG. 4;
- FIG. 6 is a side view illustrating an adhesive irregularity formed on the first prism sheet and the second prism sheet of FIG. 4;
- FIG. 7 is a view illustrating a difference in optical characteristics according to a gap between a diffusion sheet and a prism sheet of FIG. 3;
- FIG. 9 is a side view showing a prism sheet and a diffusion sheet according to another form of the second projection of the present invention.
- FIG. 10 is a view showing the contact width with the first prism sheet according to whether the first projection and the second projection of the present invention are formed independently.
- the optical sheet according to the present embodiment will be described by taking an example that is applied to the backlight module of the display device such as LCD or LED.
- the present invention is not necessarily limited thereto, and may be used independently of the optical sheet, and may be applied to other devices.
- the optical sheet according to the present exemplary embodiment may include the first prism sheet 110 and the diffusion sheet 130.
- the direction in which the diffusion sheet 130 faces the first prism sheet 110 will be referred to as one side and the opposite direction will be referred to as the other side with reference to FIG. 3. Therefore, the surface of the first prism sheet 110 facing the diffusion sheet 130 may be the other surface, and the opposite surface may be one surface. In addition, the diffusion sheet 130 may also face one surface facing the first prism sheet 110, and the opposite surface may be the other surface.
- light may be incident from the other side of the diffusion sheet 130. That is, light is incident from the other surface of the diffusion sheet 130 and is emitted to one surface, and light transmitted through the diffusion sheet 130 is incident from the other surface of the first prism sheet and is emitted to one surface.
- the first prism sheet 110 is a component for condensing light, and a plurality of fine prisms 112 may be arranged in parallel in a first direction.
- the second prism sheet 120 may be provided on one side of the first prism sheet 110.
- the second prism sheet 120 may have a plurality of prisms 122 arranged in parallel in a second direction crossing the prism 112 of the first prism sheet 110 on one surface thereof.
- the first direction and the second direction are orthogonal to each other to be described as an example, but are not necessarily limited thereto.
- the first prism sheet 110 and the second prism sheet 120 may be bonded to each other.
- the present invention is not limited thereto, and the first prism sheet 110 and the second prism sheet 120 do not necessarily need to be bonded to each other.
- the diffusion sheet 130 may be provided on the other side of the first prism sheet 110.
- the diffusion sheet 130 is a component for diffusing light incident from the light source to be uniformly emitted over the surface. As shown in FIGS. 3, 4, and 5, the first prism of the diffusion sheet 130 is provided. Protrusions may be formed on the surface facing the sheet 110.
- the protrusion may include a plurality of first protrusions 132 and second protrusions 134.
- the protrusions may be refracted or scattered by the light emitted from the diffusion sheet, thereby increasing the diffusion effect.
- the first protrusion 132 may have a spherical shape, and may be formed on the surface of the diffusion sheet 130.
- the first protrusion 132 may be formed by a method of replicating using a master (not shown), or diffusion particles such as beads (not shown) may be dispersed in the polymer resin of the diffusion sheet 130 so that a part of the polymer may be partially polymerized. It may be formed in a form embedded in the resin, and only the remaining part is exposed.
- the width of the portion exposed to the outside of the diffusion sheet 130 of the first protrusion 132 may be about 20 ⁇ m or less of 50 ⁇ m, and may have a refractive index of 1.5 to 1.7.
- the first protrusion 132 as described above may be formed of the same material as the diffusion sheet 130, or may be formed of a material such as PMMA (Poly Methyl Methacrylate), a transparent urethane, etc. .
- the second protrusion 134 is formed on a surface facing the first prism sheet 110 of the diffusion sheet 130 and has a height higher than that of the first protrusion 132. It can be formed high.
- the second protrusion 134 may contact the other surface of the first prism sheet 110 to adhesively fix the first prism sheet 110 and the diffusion sheet 130.
- the second protrusion 134 may be formed of the same material as the first protrusion 132 or may be formed of a different material.
- an adhesive is applied to the second protrusion 134 to fix the first prism sheet 110 and the diffusion sheet 130 or the second protrusion 134 may be made of a resin having adhesiveness. .
- the air layer 140 is disposed between the diffusion sheet 130 and the first prism sheet 110. ) May be formed.
- the thickness of the air layer 140 may be a gap between the first protrusion 132 of the diffusion sheet 130 and the other surface of the first prism sheet 110.
- the incident light is diffused through the diffusion sheet 130 and refracted while passing through the air layer 140 having a different refractive index, thereby improving optical characteristics.
- convex unevenness 114 and 124 may be formed on the other surfaces of the first prism sheet 110 and the second prism sheet 120.
- the irregularities 114 and 124 may be for the purpose of adhering to the other components at the same time to improve the uniformity by diffusing the incident light once again.
- the irregularities 114 and 124 are formed of a material having adhesiveness and transparency to bond the first prism sheet 110 and the second prism sheet 120 or the first prism sheet 110 and the diffusion sheet.
- the second protrusion 134 of 130 may be bonded.
- the material of the unevenness 114 and 124 may be the same or different material from that of the second protrusion 134.
- the thickness of the air layer 140 may be a gap between the first protrusion 132 of the diffusion sheet 130 and the unevenness 114 and 124 of the first prism sheet 110.
- the height of the second protrusion 134 may be constant.
- the first protrusion 132 may directly contact the first prism sheet 110, and thus, the first prism sheet 110 may be used. There is a problem in that bending occurs, and as a result, it is difficult to achieve a uniform light collecting effect.
- the first protrusion may be caused by an irregular height of the first protrusion 132. It is possible to prevent bending of the prism sheet 110.
- Figure 7 is a view showing a change in the optical characteristics according to the interval of the air layer 140.
- the leftmost result is when it is 1.5-10 micrometers, when it is 2.2-4 micrometers in the center, and the rightmost surface shows the optical characteristic when it is 3.0-1 micrometer.
- the luminance Cen is a luminance value at the center portion, and the luminance max represents a maximum luminance value.
- the brightness (Cen), the brightness (Max) is expressed as a percentage of the brightness compared to the existing optical sheet.
- the second protrusion 134 since the second protrusion 134 is in contact with the first prism sheet 110, some of the incident light is transmitted through the air layer 140 to be incident on the first prism sheet 110, and the rest of the light is incident on the first prism sheet 110. Some may enter the first prism sheet 110 through the second protrusion 134.
- the portion where the second protrusion 134 is in contact with the optical coupling phenomenon that the brightness is higher than the other portion occurs as shown in the left side of Figure 9, the surface of the optical sheet due to the difference in luminance 134a This may occur.
- the second protrusion 136 is narrower than the first protrusion 132 formed on one surface of the diffusion sheet 130 as shown in FIG. 9. Can be formed.
- the end of the first protrusion 132 may have a sharp tip.
- the second protrusion 134 is not overlapped with the first protrusion 132 and is independent of each other at different positions. It can be formed as. That is, as shown in the left side of FIG. 10, the first protrusion 132 is not formed on the surface of the second protrusion 134.
- the contact area between the second protrusion 136 and the first prism sheet 110 may be minimized.
- the unevenness 134b due to the difference in luminance is formed on the surface of the optical sheet. Can be minimized.
- FIG. 10 illustrates a state in which the first protrusion 132 and the second protrusion 134 are independently formed at different positions
- the right side of FIG. 10 shows the first protrusion 132 and the second protrusion 134.
- the protrusions of the diffusion layer 130 and the unevenness of the first prism sheet 110 are respectively.
- the protrusion portion of the diffusion layer 130 and the concave-convex portion 114 of the first prism sheet 110 are significantly smaller than the width W2 of the contact area.
- the spot 134b due to the difference in luminance on the surface of the optical sheet may be minimized.
- the prism sheet has been described as an example consisting of the first prism sheet and the second prism sheet cross-section of the prism, the present invention is not limited to this, the number of the prism sheet Regardless of the application.
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
Description
Claims (11)
- 일면에 제1방향으로 평행한 프리즘이 복수개 형성된 제1프리즘 시트;상기 제1프리즘 시트의 빛이 입사되는 면 측에 위치되며, 상기 제1프리즘 시트를 향하는 면에 돌기부가 형성된 확산시트;를 포함하는 광학시트.
- 제1항에 있어서,상기 제1프리즘 시트의 빛이 출사되는 면 측에 위치되며, 일면에 상기 제1방향과 교차하는 방향인 제2방향으로 서로 평행한 프리즘이 복수개 형성된 제2프리즘 시트를 더 포함하는 광학시트.
- 제1항에 있어서,상기 돌기부는,상기 제1프리즘 시트를 향하는 면에 복수개 형성된 제1돌기;상기 제1프리즘 시트를 향하는 면에, 상기 제1돌기보다 높이가 높게 형성되는 제2돌기;를 포함하는 광학시트.
- 제3항에 있어서,상기 제2돌기는 접착성의 물질로 이루어져, 상기 제1프리즘 시트와 확산시트를 접착 고정시키도록 형성되는 광학시트.
- 제3항에 있어서,상기 확산시트와 제1프리즘 시트의 사이에는 상기 제1돌기와 제1프리즘 시트와의 사이에 공기층이 형성되는 광학시트.
- 제3항에 있어서,상기 제2돌기의 폭은 상기 제1돌기보다 폭이 좁게 형성되는 광학시트.
- 제3항에 있어서,상기 제2돌기의 끝단은 첨단형태로 뾰족하게 형성되는 광학시트.
- 제3항에 있어서,상기 제1프리즘 시트의 빛이 입사되는 면에 요철이 형성되는 광학시트.
- 제8항에 있어서,상기 요철은 접착성의 물질로 이루어져, 상기 제2돌기와 접촉되어 상기 제2돌기를 고정시킴으로써 상기 제1프리즘시트와 확산시트를 접착 고정하도록 형성되는 광학시트.
- 제5항에 있어서,상기 공기층의 두께는 5~10μm인 광학시트.
- 제1항 내지 제10항 중 어느 한 항의 광학시트를 구비한 백라이트 유닛.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/563,911 US10996500B2 (en) | 2015-04-03 | 2016-03-24 | Optical sheet and backlight unit having same |
JP2017550933A JP6796595B2 (ja) | 2015-04-03 | 2016-03-24 | 光学シート及びこれを備えたバックライトユニット |
CN201680020208.7A CN107438791B (zh) | 2015-04-03 | 2016-03-24 | 光学片及具备其的背光单元 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020150047246A KR101710097B1 (ko) | 2015-04-03 | 2015-04-03 | 광학시트 및 이를 구비한 백라이트 유닛 |
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JP2018516381A (ja) | 2018-06-21 |
CN107438791A (zh) | 2017-12-05 |
US20180120626A1 (en) | 2018-05-03 |
KR101710097B1 (ko) | 2017-02-27 |
JP6796595B2 (ja) | 2020-12-09 |
KR20160118711A (ko) | 2016-10-12 |
US10996500B2 (en) | 2021-05-04 |
CN107438791B (zh) | 2020-12-29 |
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