WO2014003386A1 - 서로 다른 두께의 광학시트를 가지는 광학시트 모듈 - Google Patents
서로 다른 두께의 광학시트를 가지는 광학시트 모듈 Download PDFInfo
- Publication number
- WO2014003386A1 WO2014003386A1 PCT/KR2013/005544 KR2013005544W WO2014003386A1 WO 2014003386 A1 WO2014003386 A1 WO 2014003386A1 KR 2013005544 W KR2013005544 W KR 2013005544W WO 2014003386 A1 WO2014003386 A1 WO 2014003386A1
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- optical sheet
- base film
- structured pattern
- thickness
- module
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal 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
- G02B6/0033—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
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- 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
- G02B5/0231—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 the surface having microprismatic or micropyramidal shape
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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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
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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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
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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
- 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
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
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- 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
- G02B5/0215—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 the surface having a regular structure
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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
- G02B6/0031—Reflecting element, 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
- G02B6/0035—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
- G02B6/0045—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 by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
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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
- G02B6/0055—Reflecting element, 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
- G02B6/0065—Manufacturing aspects; Material aspects
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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
- 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 invention relates to an optical sheet module, and to an optical sheet module which improves uniformity and brightness of light collected by preventing wrinkles of the upper optical sheet.
- Liquid crystal displays are display devices used in notebooks, personal computers, smart phones, TVs, and the like, and their characteristics are improved year by year as demand for liquid crystal displays increases.
- a liquid crystal panel of a liquid crystal display device which is a non-light emitting element requires a back light unit due to its structure.
- the backlight unit is composed of various optical systems.
- the backlight unit uses a periodic array of optical films to improve brightness.
- FIG. 1 is a view schematically showing a configuration of a liquid crystal display device developed in the related art.
- the backlight unit 10 includes a light emitting source 1, a reflecting plate 2, a light guide plate 3, a diffusion sheet 4, a first optical sheet 5, and a second optical sheet 6. And a protective sheet 7.
- the light emitting source 1 is a device for generating visible light, and the light source 1 may be selectively used as a light emitting diode (LED) and a cold cathode fluorescent lamp (CCFL).
- LED light emitting diode
- CCFL cold cathode fluorescent lamp
- Light emitted from the light emitting source 1 is incident on the light guide plate 3 to cause total reflection inside the light guide plate 3, and light incident on the surface of the light guide plate 3 at an angle of incidence smaller than the critical angle is total reflection. Because it is not transmitted, it is emitted to the upper side and the lower side.
- the reflector 2 reflects the light emitted downward and re-enters the light guide plate 3 to improve the light efficiency.
- the diffusion sheet 4 diffuses the light emitted through the upper surface of the light guide plate 3 to uniform the brightness and widen the viewing angle.
- the light passing through the diffusion sheet 4 has a lower front emission brightness. .
- the first optical sheet 5 is composed of a substrate portion 5b and a structured pattern 5a, and refracts the light incident from the diffusion sheet 4 to firstly condense and emit the light vertically.
- the structured pattern 5a is integrally formed on the upper surface of the base portion 5b, and has a structure for refracting the light incident through the base portion 5b in the vertical direction to emit it.
- the structured pattern 5a is generally formed to have a triangular shape, and the vertex angle of the triangular shape is usually about 90 degrees.
- the second optical sheet 6 has the same shape as the first optical sheet 5, and is secondly collected by the second optical sheet 5 so as to increase the luminance of the light primarily collected by the first optical sheet 5.
- first optical sheet 5 and the second optical sheet 6 is an extension direction of the structured pattern of the first optical sheet 5 and the structured pattern of the second optical sheet 6 in order to further increase the luminance.
- first optical sheet 5 and the second optical sheet 6 are extended so that they extend perpendicularly to each other and are integrally joined together.
- the protective sheet 7 is attached to the upper surface to prevent the surface damage of the second optical sheet 6.
- An object of the present invention is to solve the problems of the conventional optical sheet module, in the bonding of a pair of optical sheet to thicken the thickness of the upper optical sheet to prevent the occurrence of wrinkles in the upper optical sheet during bonding.
- an optical sheet module having optical sheets of different thicknesses.
- having a predetermined thickness is formed on the first base film and the first base film to pass through the light transmitted from the bottom and protrudes upwards
- a second base film having a first structured pattern having a first cross-sectional pattern that decreases toward an upper portion thereof, and being laminated in a lower portion of the upper optical sheet, and transmitting light transmitted from a lower portion to the upper optical sheet;
- a lower optical sheet formed on the second base film, the lower optical sheet protruding toward the upper optical sheet and having a second structured pattern having a smaller cross sectional area toward the upper optical sheet, wherein the thickness of the first base film is the second base film. It is formed relatively thicker than its thickness.
- first base film and the second base film may be characterized in that each has a uniform thickness.
- the first base film may be formed by stacking a plurality of film layers.
- the second structured pattern may be characterized in that the upper end is bonded to the lower portion of the first base film.
- the display device may further include an adhesive layer provided between the upper optical sheet and the lower optical sheet to bond the first base film and the second structured pattern.
- the second structured pattern may be characterized in that the upper end portion is embedded in the adhesive layer.
- the second structured pattern may be characterized in that the upper end portion is in contact with the lower portion of the first base film.
- first structured pattern or the second structured pattern may be characterized in that the trajectory of the cross section is a straight line.
- first structured pattern or the second structured pattern may have the same cross-sectional shape and may extend in the transverse direction.
- the upper optical sheet and the lower optical sheet may be arranged to intersect the extending direction of the first structured pattern and the extending direction of the second structured pattern.
- the lower optical sheet and the upper optical sheet is disposed in a stacked form may further comprise a reflective polarizing plate for selectively transmitting the light according to the polarization state of the light transmitted from the lower.
- the reflective polarizing film may be stacked between the upper optical sheet and the lower optical sheet or may be provided stacked on top of the upper optical sheet.
- the sheet may have a sheet, and the distance from the lowest point of the first structured pattern to the lower surface of the upper optical sheet may be longer than the distance from the lowest point of the second structured pattern to the lower surface of the lower optical sheet.
- Optical sheet module can be formed by the thickness of the upper optical sheet thicker than the thickness of the lower optical sheet, it is possible to reduce the occurrence of wrinkles when bonding the upper optical sheet on the upper of the lower optical sheet.
- the upper optical sheet and the lower optical sheet are provided with respective base films, and by forming a thick thickness of the base film of the upper optical sheet laminated and bonded on top of the lower optical sheet, the upper optical sheet There is an effect that can reduce the occurrence of wrinkles in the base film to improve the brightness of the transmitted light.
- the upper optical sheet and the lower optical sheet are laminated, thereby improving the durability of the bonded optical sheet module.
- FIG. 1 is a view schematically showing a configuration of a conventionally developed liquid crystal display device
- FIG. 2 is an exploded perspective view showing a schematic configuration of an optical sheet module having an optical sheet having a different thickness according to an embodiment of the present invention
- FIG. 3 is a side view illustrating a schematic configuration of an optical sheet module having optical sheets having different thicknesses of FIG. 2;
- FIG. 4 is a view showing a process of bonding the optical sheet module of FIG.
- FIG. 5 is a view illustrating a state in which an upper optical sheet and a lower optical sheet are bonded through the process of FIG. 4;
- FIG. 6 is a view showing the degree of bending according to the thickness of the first base film of FIG.
- FIG. 7 is an exploded perspective view showing a configuration in which an adhesive layer is further included in the optical sheet module of FIG. 2;
- FIG. 8 is a side view illustrating a state in which the optical sheet module of FIG. 7 is bonded
- FIG. 9 is a view showing a modified form of the second structured pattern in the optical sheet module of FIG.
- FIG. 10 illustrates another modified form of the second structured pattern in the optical sheet module of FIG. 2;
- FIG. 11 is an exploded perspective view showing a state in which the reflective polarizing film is further included in the optical sheet module of FIG. 2; FIG. And
- FIG. 12 is a view illustrating a state in which light is transmitted or reflected by the reflective polarizing film of FIG. 11.
- Optical sheet module having an optical sheet of different thickness can be applied to various fields for changing the path of the light, in this embodiment will be described as an example applied to the liquid crystal display device do.
- FIGS. 2 and 3 a schematic configuration of an optical sheet module having an optical sheet having a different thickness according to an embodiment of the present invention will be described.
- FIG. 2 is an exploded perspective view showing a schematic configuration of an optical sheet module having an optical sheet having a different thickness according to an embodiment of the present invention
- Figure 3 is a schematic view of an optical sheet module having an optical sheet having a different thickness of Figure 2 It is a side view which showed a structure.
- a back light unit (BLU) for providing light to the liquid crystal panel should be provided.
- the backlight unit is largely composed of a light source 100, a light guide plate 200, a diffusion sheet 300, and an optical sheet module 400.
- the light source 100 generally includes a light emitter that emits light, and emits light from the side of the light guide plate 200 to transmit light toward the light guide plate 200.
- the light guide plate 200 reflects and scatters the light emitted from the light source 100 and transmits the light toward the diffusion sheet 300.
- the diffusion sheet 300 is disposed above the light guide plate 200 and diffuses the light transmitted from the light guide plate 200 to spread the light evenly and transfers the light upwardly.
- the optical sheet module 400 collects and transmits the light transmitted to the upper portion of the diffusion sheet 300.
- the optical sheet module 400 is generally composed of a pair of an upper optical sheet 410 and a lower optical sheet 420.
- Light is collected and refracted in a direction orthogonal to the plane of the optical sheet module 400 by the structured pattern formed on the upper optical sheet 410 and the lower optical sheet 420 configured as described above.
- the optical sheet module 400 is composed of the upper optical sheet 410 and the lower optical sheet 420.
- the upper optical sheet 410 is largely composed of a first base film 414 and a first structured pattern 412.
- the first base film 414 transmits light transmitted from the lower part to the upper part, and transmits the light to the upper part, and at the same time, the first structured pattern 412 is formed on the upper surface, and the transmitted light passes through the first structured pattern 412. It supports to be refracted and focused.
- the first structured pattern 412 protrudes upward on the upper surface of the first base film 414 and is formed to have a smaller cross sectional area toward the upper side. Thus, the light that has passed through the first base film 414 is refracted and condensed and transferred to the upper portion.
- the upper optical sheet 410 configured as described above emits light by refracting and condensing light transmitted from the lower side by the first structured pattern 412.
- the first structured pattern 412 is formed such that a triangular prism extends in one direction, and a plurality of first structured patterns 412 may be arranged.
- the lower optical sheet 420 is largely composed of a second base film 424 and a second structured pattern 422, and is disposed below the upper optical sheet 410 and is disposed on an upper surface of the second base film 424.
- the second structured pattern 422 is formed.
- the second base film 424 transmits the light transmitted from the diffusion sheet disposed below and to the upper side, and at the same time, the second structured pattern 422 is formed on the upper surface. Is formed.
- the second structured pattern 422 is formed to have a smaller cross-sectional area toward the top, similar to the first structured pattern 412, and is exposed to air therein to refract light transmitted from the diffusion sheet 300. Deliver upwards.
- the lower optical sheet 420 configured as described above is stacked between the diffusion sheet and the upper optical sheet 410 and refracts and condenses the light transmitted from the diffusion sheet through the second structured pattern 422. Transfer to the optical sheet 410.
- first base film 414 and the second base film 424 are each formed to have a uniform thickness. That is, although the thicknesses of the first base film 414 and the second base film 424 are different from each other, each of the first base film 414 and the second base film 424 has the same cross-sectional area and is elongated to form the first structured pattern 412 and the second structured on an upper surface thereof. Pattern 422 is formed.
- first structured pattern 412 and the second structured pattern 422 may be provided with a pair of extension surfaces extending upwardly inclined upward and may have a triangular shape formed so that upper ends of the extension surfaces meet each other. have.
- cross-sectional trajectories of the first structured pattern 412 and the second structured pattern 422 may be formed in a straight line.
- the shape of the first structured pattern 412 and the second structured pattern 422 is not limited to a specific form, but is selected for easy understanding of the configuration according to the embodiment of the present invention.
- first base film 414 and the second base film 424 may be made of a material having high light transmittance so as to transmit light transmitted from the diffusion sheet 300.
- the upper optical sheet 410 and the lower optical sheet 420 configured as described above are formed with each of the first structured pattern 412 and the second structured pattern 422 having the same cross-sectional area and extending along the transverse direction.
- the extension direction of the first structured pattern 412 and the extension direction of the second structured pattern 422 are joined to each other along the transverse direction.
- various angles may be applied to the crossing angles of the first structured pattern 412 and the second structured pattern 422.
- the state in which the upper optical sheet 410 and the lower optical sheet 420 are bonded is as follows.
- FIG. 3 is a side view illustrating a schematic configuration of an optical sheet module having optical sheets having different thicknesses of FIG. 2.
- the upper optical sheet 410 includes the first structured pattern 412 and the first base film 414, and the lower optical sheet 420 includes the second structured pattern 422 and the second base.
- the film 424 is comprised.
- the lower optical sheet 420 is stacked below the upper optical sheet 410, and an upper end of the second structured pattern 422 is formed in the lower portion of the first base film 414. It is bonded to the lower surface.
- the first structured pattern 412 and the second structured pattern 422 may be formed in the same size and shape, and may be formed in different sizes and shapes.
- the upper base end of the second structured pattern 422 does not have a separate adhesive, and the first base film 414 is formed. It is bonded at the bottom of the upper end of the second structured pattern 422 serves as an adhesive.
- wrinkles may occur in the first base film 414 by an external force in the process of bonding the second structured pattern 422 and the first base film 414. A process of bonding the second structured pattern 422 to the bottom surface of the first base film 414 will be described later with reference to FIG. 4.
- the thickness H1 of the first base film 414 formed on the upper surface of the first structured pattern 412 is thicker than the thickness H2 of the second base film 424.
- the thickness H1 of the first base film 414 is formed to be thicker than the thickness H2 of the second base film 424, so that the first base film 414 may have the second structured pattern ( When the first base film 414 is bent by the external force when the bonding on the upper portion of the 422 prevents wrinkles.
- the first base film 414 may be formed by stacking a plurality of film layers 414a having a uniform area.
- the first base film 414 may be formed by stacking a plurality of the film layers 414a, thereby preventing the warpage from occurring due to an external force due to an increase in the thickness of the first base film 414.
- the first base film 414 is formed by stacking a pair of the film layers 414a, and one thickness H2 of the film layer 414c is It is formed to have the same thickness as the thickness (H2) of the second base film (424). That is, the thickness H1 of the first base film 414 is configured to have a thickness about twice that of the thickness H2 of the second base film 424.
- the thickness of the film layer 414a is not limited to the same thickness as that of the second base film 424.
- the thickness of the film layer 414a may be the same as or different from the thickness of the second base film 424, and the thickness H1 of the first base film 414 may be It may be formed thicker or thinner than twice the thickness H2 of the second base film 424.
- the first base film 414 is formed thick, bending rigidity is increased to reduce bending of the pressing force acting from the outside.
- the upper optical sheet 410 and the lower optical sheet 420 may be formed. Since the overall thickness in the bonded state does not change significantly, by increasing the thickness H1 of the first base film 414, which causes the most warping during bonding, the increase in the total thickness is minimized and wrinkles are generated. You can prevent it.
- the thickness H1 of the first base film 414 and the thickness H2 of the second base film 424 are increased, overall durability and wrinkles may be reduced, but the overall thickness may be increased.
- the luminance decreases as the distance passed by the light transmitted from the lower portion increases.
- the increase in overall thickness is minimized and the When the first base film 414 is bonded to prevent wrinkles from occurring.
- the lower optical sheet is formed according to the process of bonding the first base film 414 to the upper portion of the lower optical sheet 420 and the thickness of the first base film 414. Looking at the state in which the first base film 414 is bonded to 420 as follows.
- FIG. 4 is a view illustrating a process in which the optical sheet module 400 of FIG. 2 is bonded
- FIG. 5 is a view illustrating a state in which the upper optical sheet 410 and the lower optical sheet 420 are bonded through the process of FIG. 4. to be.
- the second base film 424 having a predetermined thickness passes through the front roller parts R1 and R2 in the area A, and the second structured pattern 422 is formed on the upper surface.
- the front roller parts R1 and R2 are disposed to be formed of the first front roller R1 and the second front roller R2 in the upper and lower portions on the path where the second base film 424 is transferred.
- the first front roller R1 has a predetermined pattern formed on its outer circumferential surface, and its end portion is disposed to contact the upper surface of the second base film 424, and the second front roller R2 has a predetermined pattern formed on its outer circumferential surface.
- the outer circumferential surface is disposed to be in contact with the lower surface of the second base film 424.
- the second base film 424 is a liquefaction material of the second structured pattern 422 from the liquefaction input portion I separately provided before passing through the front roller parts R1 and R2 on a moving path. (L) is injected and supplied. Thereafter, the liquefied liquid L injected into the upper surface of the second base film 424 passes through the area A and the second structured pattern 422 is formed by a pattern formed in the first front roller R1. do.
- the liquefaction (L) is cured at the same time as passing through the first front roller (R1) to form the second structured pattern (422).
- the liquefaction (L) is in a state in which the bonding force is maintained at a predetermined level in a state where only a part of the liquefaction L is completely cured.
- the second structured pattern 422 is formed on the upper surface of the second base film 424 by passing through the first front roller R1 and the second front roller R2 disposed as described above.
- the second base film 424 having the second structured pattern 422 formed on the upper surface is moved to the B region. Bonding of the second base film 424 and the first base film 414 supplied from the outside occurs in the region B.
- the second base film 424 and the first base film 414 are bonded while passing through the rear roller parts R3 and R4 provided in the B region.
- the rear rollers R3 and R4 are constituted by a pair of first rear rollers R3 and a second rear rollers R4, each of the first base film 414 and the second base film 424. It is placed on the path to be joined and moved.
- the first base film 414 is moved along the first rear roller R3 and bonded together with the second base film 424 in the B region.
- the first base film 414 has a bottom surface in contact with an upper end portion of the second structured pattern 422 formed on the second base film 424 and the first rear roller R3 and the second. It is pressed by the rear roller R4 and joined.
- the upper optical sheet 410 and the lower optical sheet 420 are bonded.
- the state in which the upper optical sheet 410 and the lower optical sheet 420 are bonded to each other according to the thickness of the first base film 414 is as follows.
- the thickness H1 of the first base film 414 and the thickness H2 of the second base film 424 pass through the region B in the same state.
- the lower optical sheet 420 and the first base film 414 are bonded to each other.
- the first base film 414 passes between the first rear roller R3 and the second rear roller R4 and is bonded to the second structured pattern 422 by pressing. Wrinkles are generated in the first base film 414.
- wrinkles may occur due to bending due to the pressure generated by the pressing of the rear roller parts R3 and R4. Will be produced. Wrinkles occur in the first base film 414 so that the upper and lower surfaces are not evenly formed and have an irregular surface.
- the light transmitted from the lower portion is not uniformly refracted and collected, thereby lowering luminance.
- Figure 5 (b) is the thickness of the first base film 414 (H1) is formed thicker than the thickness (H2) of the second base film 424 is passed through the area B as the lower optical
- the sheet 420 and the first base film 414 are bonded to each other.
- the first base film 414 passes between the first rear roller R3 and the second rear roller R4 and is bonded to the second structured pattern 422 by pressing.
- the first base film 414 is bonded to the second structured pattern 422
- wrinkles are hardly generated. Since the thickness H1 of the first base film 414 is formed to be thick, the pressure applied by the first rear roller R3 is sustained, and thus no bending occurs even though the first base film 414 passes through the B region.
- a surface may be regularly formed, thereby uniformly refracting and condensing light transmitted from the bottom.
- FIG. 6 is a diagram illustrating a degree of bending according to the thickness of the first base film 414 of FIG. 2.
- FIG. 6 is a diagram of bending stress, and as shown in FIG. 6 (a), no force is applied at the points C1, C2, T1, and T2 in a state where no external force is applied.
- the C3 and C4 points which were C1 and C2 points in FIG. 6 (a), receive a compressive stress.
- the acting external force may be a pressing force by the first rear roller R3 when the first base film 414 and the second structured pattern 422 are bonded to each other.
- the C3 point and the C4 point are subjected to a compressive force by bending about the neutral plane NS for bending along the thickness direction, and away from the neutral plane NS for bending along the thickness direction. The larger the size becomes.
- the T3 and T4 points are pulled by bending about the neutral plane NS for bending along the thickness direction, and centered on the neutral plane NS for bending along the thickness direction. The further the distance, the larger the size.
- the force sustained by the external force increases, so when the size of the cross-sectional area increases, the force sustained by the external force increases.
- the thickness of the first base film 414 increases, the distance from the neutral plane of bending along the thickness direction increases, and the size of the cross-sectional area increases, thereby reducing bending of the load from the top.
- FIG. 7 is an exploded perspective view showing a configuration in which the adhesive layer 430 is further included in the optical sheet module 400 of FIG. 2, and FIG. 8 is a side view illustrating a state in which the optical sheet module 400 of FIG. 7 is bonded.
- FIG. 7 and 8 illustrate a state in which the upper optical sheet 410 and the lower optical sheet 420 are bonded to each other by the adhesive layer 430.
- the basic configuration is the same, but the configuration of the optical sheet module 400 is different.
- the optical sheet module 400 may further include the upper optical sheet 410, the lower optical sheet 420, and a separate adhesive layer 430.
- the adhesive layer 430 is provided below the upper optical sheet and allows the lower optical sheet and the upper optical sheet to be bonded. At this time, the adhesive layer 430 is preferably made of a material having a high light transmittance so as to transmit the light transmitted from the diffusion sheet.
- the optical sheet module 400 further includes the adhesive layer 430, so that the second structured pattern 422 is bonded to the second structured pattern 422 and the first base film 414.
- the adhesive layer 430 By inserting into the adhesive layer 430 without acting as an adhesive, the shape of the upper end portion of the second structured pattern 422 may be preserved.
- the area where the upper end end of the second structured pattern 422 is inserted into the adhesive layer 430 becomes larger, thereby increasing the area of the upper optical sheet 410 and the lower optical sheet 420. Bonding quality is increased.
- the thickness of the upper optical sheet 410 is not only the thickness H1 of the first base film 414 but also the adhesive layer 430. Since the thickness becomes thicker, the wrinkles of the first base film 414 may be further reduced when the second structured pattern 422 is bonded to the first base film 414.
- the optical sheet module 400 may further include a separate adhesive layer 430.
- FIG. 9 is a view illustrating a modified form of the second structured pattern in the optical sheet module of FIG. 2
- FIG. 10 is a view illustrating another modified form of the second structured pattern in the optical sheet module of FIG. 2.
- FIG. 9A illustrates a bonding surface 422a having an upper end portion in contact with a lower surface of the first base film 414 in contact with a lower surface of the first base film 414 in the second structured pattern 422. It is a figure of a state.
- the bonding quality between the first base film 414 and the lower optical sheet 420 may be increased.
- FIG. 9B illustrates an upper end portion of the second structured pattern 422 embedded in the adhesive layer 430 in the optical sheet module 400 to be bonded to the first base film 414. Drawing.
- an upper end portion of the second structured pattern 422 is embedded into the adhesive layer 430 and has a pair of extension surfaces formed extending in an upper direction, and above the extension surfaces. Both ends are connected to each end and a bonding surface 422a is attached to the first base film 414.
- the second structured pattern 422 is formed to have the bonding surface 422a and is bonded to the first base film 414 to thereby form the upper optical sheet 410 and the The bonding quality of the lower optical sheet 420 may be improved.
- each of the extension surfaces may be embedded in the adhesive layer 430 to be bonded to each other to further improve the bonding quality of the upper optical sheet 410 and the lower optical sheet 420.
- FIG. 10 the shape of FIG. 9 (b) is modified, and the upper end portion of the second structured pattern 422 does not have a separate bonding surface 422 a into the adhesive layer 430. It is a configuration that is formed so that a pair of extension surface is formed buried and extending in the upper direction meet at the top.
- the second structured pattern 422 includes a pair of extension surfaces, and the upper end portion is formed in a triangular shape so that the upper end portion of the second structured pattern 422 is embedded into the adhesive layer 430 and adhered thereto. Quality is increased.
- the inclination angle of the cross section trajectory of the upper end portion of the second structured pattern 422 is greater than the inclination angle of the lower cross section trajectory, thereby being incident from the bottom to enter the adhesive layer 430. You can adjust the angle of refraction of the refracted light.
- the inclination angle of the upper end portion of the second structured pattern 422 is formed to be different from the inclination angle of the lower portion, so that the second structured structure is formed even when the upper end portion of the second structured pattern 422 is embedded in the adhesive layer 430.
- the light incident on the pattern 422 may be refracted to be close to the vertical direction and transmitted upward.
- an additional reflective polarizing film is further included in an optical sheet module according to an embodiment of the present invention is as follows.
- FIG. 11 is an exploded perspective view illustrating a state in which the reflective polarizing film is further included in the optical sheet module of FIG. 2, and
- FIG. 12 is a view illustrating a state in which light is transmitted or reflected by the reflective polarizing film of FIG. 11.
- a separate reflective polarizing film 500 is further included on the top of the upper optical sheet 410 and is provided in a stacked form so that the upper optical sheet 410 and the lower optical sheet 420 are provided. It selectively transmits the light condensed by.
- the reflective polarizer 500 selectively transmits light according to the polarization state of light and returns the light having a different polarization state to the light guide plate 200.
- An example of such a device is a dual brightness enhancement film (DBEF).
- the reflected light that does not pass through the DBEF is reflected back through the light guide plate 200 at the bottom of the BLU and is directed upward.
- DBEF repeats the role of passing only the light with the correct polarization state and then reflecting the remaining light.
- the reflective polarizing film 500 is stacked on the upper optical sheet 410 and is disposed on the lower optical sheet 420 and the upper optical sheet 410.
- the light collected through the light beam is directed toward the reflective polarizing film 500.
- the light directed toward the reflective polarizing film 500 is a state in which light of various polarization states are mixed, and the light of P1 having the polarization state transmitted by the reflective polarizing film 500 and the reflective polarizing film 500 are transmitted.
- the light passing through the upper optical sheet 410 and the lower optical sheet 420 is a mixed state of P1 and P2, but the reflective polarizing film 500 transmits only P1 light and the light of P2 is lower again. Reflect in the direction.
- the light of P1 is emitted to the outside, but the light of P2 is reflected and returned to the bottom, and is reflected by the light guide plate 200 to move upward.
- the light of P2 is changed in the direction of travel and the polarization state, and through such repetition, the reflective polarizing film 500 is converted into a state suitable for transmission.
- the reflective polarizing film 500 reduces the loss of light and simultaneously emits light having a desired refractive angle and polarization state to increase brightness of the display module.
- the reflective polarization film 500 may not only be stacked and disposed on the upper optical sheet 410, but also may be stacked and disposed between the upper optical sheet 410 and the lower optical sheet 420. It may be.
Abstract
Description
Claims (14)
- 소정의 두께를 가지고 하부로부터 전달되는 빛을 투과시켜 상부로 통과시키는 제 1베이스필름 및 상기 제 1베이스필름의 상에 형성되며 상부로 돌출되어 상부로 갈수록 횡단면적이 작아지는 제 1구조화패턴을 가지는 상부광학시트; 및상기 상부광학시트의 하부에 적층 형태로 구비되며, 제 2 베이스필름 및 상기 제 2 베이스필름상에 형성되며 상기 상부광학시트 측으로 돌출되어 상부로 갈수록 횡단면적이 작아지는 제 2구조화패턴을 가지는 하부광학시트;를 포함하며,상기 제 1베이스필름의 두께는 상기 제 2베이스필름의 두께보다 상대적으로 더 두껍게 형성되는 광학시트 모듈.
- 제 1항에 있어서,상기 제 1베이스필름 및 상기 제 2베이스필름은,각각이 균일한 두께를 가지도록 형성되는 것을 특징으로 하는 광학시트 모듈.
- 제 1항에 있어서,상기 제 1베이스필름은,복수 개의 필름층이 적층되어 형성된 것을 특징으로 하는 광학시트 모듈.
- 제 1항에 있어서,상기 제 2구조화패턴은,상측 끝단부가 상기 제 1베이스필름의 하부에 접합되는 것을 특징으로 하는 광학시트 모듈.
- 제 1항에 있어서,상기 상부광학시트와 상기 하부광학시트 사이에 구비되어 상기 제 1베이스필름과 상기 제 2구조화패턴을 접합시키는 접착층을 더 포함하는 것을 특징으로 하는 광학시트 모듈.
- 제 5항에 있어서,상기 제 2구조화패턴은,상측 끝단부가 상기 접착층 내부에 매립되는 것을 특징으로 하는 광학시트 모듈.
- 제 6항에 있어서,상기 제 2구조화패턴은,상측 끝단부가 상기 제 1베이스필름의 하부에 접하는 것을 특징으로 하는 광학시트 모듈.
- 제 1항에 있어서,상기 제 1구조화패턴 또는 상기 제 2구조화패턴은,단면의 궤적이 직선으로 이루어지는 것을 특징으로 하는 광학시트 모듈.
- 제 1항 내지 제 8항 중 어느 한 항에 있어서,상기 제 1구조화패턴 또는 상기 제 2구조화패턴은,동일한 단면 형태를 가지며 횡 방향을 따라 연장되어 형성되는 것을 특징으로 하는 광학시트 모듈.
- 제 9항에 있어서,상기 상부광학시트 및 상기 하부광학시트는,상기 제 1구조화패턴의 연장방향 및 상기 제 2구조화패턴의 연장방향이 교차되도록 배치되는 것을 특징으로 하는 광학시트 모듈.
- 제 1항에 있어서,상기 하부광학시트 및 상기 상부광학시트와 적층형태로 배치되어 하부로부터 전달되는 빛의 편광 상태에 따라 선택적으로 빛을 투과시키는 반사편광필름을 더 포함하는 것을 특징으로 하는 광학시트 모듈.
- 제 11항에 있어서,상기 반사편광필름은,상기 상부광학시트와 상기 하부광학시트 사이에 적층되어 구비되는 것을 특징으로 하는 광학시트 모듈.
- 제 11항에 있어서,상기 반사편광필름은,상기 상부광학시트의 상부에 적층되어 구비되는 것을 특징으로 하는 광학시트 모듈.
- 상면에 돌출되어 상부로 갈수록 횡단면적이 작아지는 제 1구조화패턴이 형성되어 하부로부터 전달되는 빛을 집광시키는 상부광학시트; 및상기 상부광학시트의 하부에 적층 형태로 구비되며, 상면에 상기 상부광학시트 방향으로 돌출되어 상부로 갈수록 횡단면적이 작아지는 제 2구조화패턴을 가지며 하부로부터 전달되는 빛을 집광하여 상기 상부광학시트로 전달하는 하부광학시트를 가지며;상기 제 1구조화패턴의 최하 지점에서부터 상기 상부광학시트의 하면에 이르는 거리가 상기 제 2구조화패턴의 최하 지점에서부터 상기 하부광학시트의 하면에 이르는 거리보다 긴 것을 특징으로 하는 광학시트 모듈.
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CN201380033547.5A CN104412131B (zh) | 2012-06-25 | 2013-06-24 | 具有互不相同的厚度的光学片的光学片模块 |
US14/410,663 US10598846B2 (en) | 2012-06-25 | 2013-06-24 | Optical sheet module consisting of optical sheets having different thicknesses |
JP2015520007A JP6105726B2 (ja) | 2012-06-25 | 2013-06-24 | 互いに異なる厚さの光学シートを有する光学シートモジュール |
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KR10-2012-0068052 | 2012-06-25 | ||
KR1020120068052A KR101321718B1 (ko) | 2012-06-25 | 2012-06-25 | 서로 다른 두께의 광학시트를 가지는 광학시트 모듈 |
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- 2013-06-24 CN CN201380033547.5A patent/CN104412131B/zh active Active
- 2013-06-24 US US14/410,663 patent/US10598846B2/en active Active
- 2013-06-24 JP JP2015520007A patent/JP6105726B2/ja active Active
- 2013-06-24 WO PCT/KR2013/005544 patent/WO2014003386A1/ko active Application Filing
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Also Published As
Publication number | Publication date |
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CN104412131B (zh) | 2017-10-27 |
JP6105726B2 (ja) | 2017-03-29 |
US20150301264A1 (en) | 2015-10-22 |
US10598846B2 (en) | 2020-03-24 |
CN104412131A (zh) | 2015-03-11 |
JP2015524936A (ja) | 2015-08-27 |
KR101321718B1 (ko) | 2013-10-28 |
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