WO2022097993A1 - Optical film for improving contrast ratio - Google Patents
Optical film for improving contrast ratio Download PDFInfo
- Publication number
- WO2022097993A1 WO2022097993A1 PCT/KR2021/015296 KR2021015296W WO2022097993A1 WO 2022097993 A1 WO2022097993 A1 WO 2022097993A1 KR 2021015296 W KR2021015296 W KR 2021015296W WO 2022097993 A1 WO2022097993 A1 WO 2022097993A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refractive index
- optical film
- relative luminance
- layer
- high refractive
- Prior art date
Links
- 239000012788 optical film Substances 0.000 title claims abstract description 43
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 12
- 238000010030 laminating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 3
- 239000010410 layer Substances 0.000 description 59
- 239000004973 liquid crystal related substance Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Images
Classifications
-
- 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
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
-
- 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
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- 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
-
- 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
-
- 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
- G02F1/133507—Films for enhancing the luminance
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
Definitions
- the present invention relates to an optical film. Specifically, the present invention relates to an optical film capable of improving a viewing angle by increasing side brightness.
- the liquid crystal display operates by emitting light from the backlight unit through the liquid crystal panel.
- luminance and contrast ratio are high on the front side of the screen, but luminance and contrast ratio are low on the side surface.
- the bright and dark parts of the screen can be expressed in detail only when the contrast ratio is high, and as a result, excellent image quality can be realized.
- the liquid crystal display device may include a laminate having a structure in which a first polarizing plate, a liquid crystal panel, and a second polarizing plate are stacked.
- the first polarizer may be coupled to a lower portion of the liquid crystal panel to polarize incident light.
- the liquid crystal panel is coupled between the first polarizing plate and the second polarizing plate to transmit light incident from the first polarizing plate to the second polarizing plate, and may include a liquid crystal layer as a display medium.
- the second polarizing plate is coupled to the upper portion of the liquid crystal panel to polarize and diffuse light passing through the liquid crystal panel, thereby increasing the luminance and contrast ratio of the side surface.
- the second polarizing plate may have a structure in which a polarizer, an optical film, a protective layer, and the like are stacked.
- FIGS. 1A and 1B are cross-sectional views showing a conventional optical film used for a polarizing plate.
- the conventional optical films 110 and 120 may be configured by laminating high refractive index layers 111 and 121 and low refractive index layers 112 and 122 .
- the high refractive index layers 111 and 121 may have a recessed engraved pattern.
- the engraved pattern includes inclined portions S1 and S2 between the depressed flat portions F1 and F2 and one surface of the high refractive index layers 111 and 121 .
- the inclined portions S1 and S2 are configured in a straight line form S1 as shown in FIG. 1A .
- the inclined portions S1 and S2, as shown in FIG. 1B are recessed (bent) from the low refractive layer 122 to the high refractive index layer 121, that is, are formed of a recessed curved inclined portion S2.
- the intaglio pattern may have a long width of 10 to 20 ⁇ m and a short width of 5 to 15 ⁇ m.
- the front relative luminance may be 92% or more of the front luminance before laminating the optical film, and the 60° side relative luminance may be 14% or more of the front relative luminance.
- the high refractive layer may have a refractive index of 1.57 to 1.70, and the low refractive layer may have a refractive index of 1.42 to 1.50.
- the refractive index difference between the high refractive index layer and the low refractive index layer may be 0.07 to 0.28.
- the polarizing plate according to the present invention may include the optical film for improving the contrast ratio described above.
- a curved inclined portion is formed in the engraved pattern of the high refractive index layer, but is curved while protruding from the high refractive index layer to the low refractive index layer, that is, it is configured in a protruding curved surface inclined portion.
- the present invention can maximize the 60° side relative luminance while minimizing the deterioration of the frontal relative luminance compared to the prior art in which the inclined portion of the intaglio pattern is configured as a straight line or a recessed curved surface inclined.
- FIG. 2 is a cross-sectional view showing an optical film according to the present invention.
- the high refractive index layer 211 may form an intaglio pattern RP on a surface opposite to the low refractive index layer 212 .
- the engraved pattern RP may include a depressed flat portion F3 and a protruding curved inclined portion S3 .
- the depression flat portion F3 is formed by being depressed to a predetermined depth D in the central region of the intaglio pattern RP.
- the depression flat portion F3 may be formed in parallel with one surface of the high refractive index layer 211 (a surface coupled to the low refractive index layer 212 in FIG. 2 ).
- the protruding curved inclined portion S3 may be formed while obliquely connecting both ends of the concave flat portion F3 and one surface of the high refractive index layer 211 (the surface coupled to the low refractive index layer 212 in FIG. 2 ).
- the protruding curved inclined portion S3 may be formed as a curved protruding (or curved) shape in a direction from the high refractive index layer 211 to the low refractive index layer 212 , that is, a protruding curved inclined portion.
- the engraved pattern (RP) is known to have a large light diffusion effect when the long width (LW) and the short width (SW) are 5 to 20 ⁇ m and the depth (D) is 5 to 15 ⁇ m. Accordingly, in the present invention, the long width (LW) can be set to 10 to 20 ⁇ m, the short width (SW) to 5 to 15 ⁇ m, and the depth (D) can be set first to 5 to 15 ⁇ m.
- the engraved pattern RP may be formed to be spaced apart from each other.
- the low refractive index layer 212 may be coupled to one surface (lower surface in FIG. 2 ) of the high refractive index layer 211 while filling (or burying) the intaglio pattern RP of the high refractive index layer 211 .
- the low refractive index layer 212 may be formed of an ultraviolet curable transparent resin, for example, (meth)acrylic, polycarbonate, silicone, or epoxy resin.
- the low refractive layer 212 may have a refractive index of 1.42 to 1.50.
- Table 1 below shows that the front relative luminance and the 60° side relative luminance change according to the shape change of the intaglio pattern (RP).
- the high refractive index layer 211 used an acrylic resin having a refractive index of 1.58.
- the low refractive index layer 212 used an epoxy resin having a refractive index of 1.44.
- the intaglio pattern (RP) had a long width (LW) of 10 ⁇ m, a short width (SW) of 5 ⁇ m, a depth (D) of 15 ⁇ m, and a period (T) of 29 ⁇ m. While changing the radius of curvature R of the protruding curved inclined portion S3, the front relative luminance and the 60° side relative luminance were measured.
- the inclined portion S3 according to the present invention in order to compare the technical effects of the protruding curved inclined portion S3 according to the present invention and the conventional inclined portion (straight line, recessed curved surface inclined), the inclined portion according to the prior art (straight line, recessed curved surface inclined) also , the front relative luminance and the 60° side relative luminance were measured.
- the relative luminance of the front exceeded 92% in some experimental examples, but did not exceed 14% in all of the relative luminance of the 60° side.
- the frontal relative luminance exceeds 92% at a radius of curvature (R) of 50 to 150 ⁇ m, and when the radius of curvature (R) is 30 to 150 ⁇ m, a 60° side relative luminance is 14 % was measured.
- the radius of curvature R of the protruding curved inclined portion S3 in the present invention is preferably limited to 50 to 150 ⁇ m. This limitation of the radius of curvature R may have a technical meaning.
- Table 2 below shows the results of measuring the front relative luminance and 60° side relative luminance while changing the radius of curvature (R) of the protruding curved inclined part (S3) after making the shape of the intaglio pattern (RP) different from Table 1 above. is showing Here, the high refractive index layer 211 and the low refractive index layer 212 used the same material as in Table 1 above.
- the intaglio pattern (RP) had a long width (LW) of 15 ⁇ m, a short width (SW) of 10 ⁇ m, a depth (D) of 15 ⁇ m, and a period (T) of 29 ⁇ m.
- the front surface of the conventional inclined portion (straight, depressed curved surface inclined) Relative luminance and 60° side relative luminance were measured.
- the front relative luminance exceeded 92% in some experimental examples, but it was measured that all of them did not exceed 14% in the 60° side relative luminance.
- the front relative luminance exceeds 92% at a radius of curvature (R) of 50 to 150 ⁇ m, and the radius of curvature (R) is 30 to At 150 ⁇ m, the 60° side relative luminance was measured to exceed 14%.
- the radius of curvature (R) of the protruding curved surface in the protruding curved inclined portion (S3) of the present invention is 50 to It is preferable to limit it to 150 micrometers.
- Table 3 below shows the front relative luminance and 60° side relative luminance while changing the radius of curvature (R) of the protruding curved inclined part (S3) after making the shape of the intaglio pattern (RP) different from Tables 1 and 2 above.
- the high refractive index layer 211 and the low refractive index layer 212 used the same material as in Table 1 above.
- the intaglio pattern (RP) had a long width (LW) of 20 ⁇ m, a short width (SW) of 15 ⁇ m, a depth (D) of 15 ⁇ m, and a period (T) of 29 ⁇ m.
- the intaglio pattern (RP) is preferably composed of an inclined portion with a protruding curved surface inclined.
- the radius of curvature R of the protruding curved surface is preferably configured to be 50 to 150 ⁇ m.
- the high refractive layer 211 may be used as a material having a refractive index of 1.57 to 1.70.
- the optical film of the present invention may use the low-refractive layer 212 as a material having a refractive index of 1.42 to 1.50.
- the refractive index difference between the high refractive index layer 211 and the low refractive index layer 212 may be 0.07 to 0.28.
- FIG 3 is a cross-sectional view showing a modified example of the optical film according to the present invention.
- the deformable optical film 220 fills the low refractive index layer 212 only inside the intaglio pattern RP of the high refractive index layer 211 and one surface of the high refractive index layer 211 (the lower surface in FIG. 3 ). ) may be configured in a form in which the low refractive layer 212 is not coupled. By doing so, the deformable optical film 220 can minimize the thickness. As a result, it can contribute to thinning of a display device.
- the optical film described above can be used as part of a polarizing plate.
- the polarizing plate may have, for example, a structure in which the above-described optical film is inserted and laminated between the polarizer film and the protective film.
- optical film described above may be used in various display devices, for example, a plasma panel, an electroluminescent panel, an organic light emitting diode panel, etc. in addition to the liquid crystal panel.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Laminated Bodies (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
곡률반경 (㎛)radius of curvature (μm) |
정면 상대 휘도(%)face Relative luminance (%) |
60° 측면 상대 휘도(%)60° side Relative luminance (%) |
비고note | |
실험례 1Experimental Example 1 | -- | 91.991.9 | 12.412.4 | 직선Straight |
실험례 2Experimental Example 2 | 5050 | 92.092.0 | 13.113.1 |
함몰 곡면 경사depression curved surface slope |
실험례 3Experimental Example 3 | 100100 | 93.193.1 | 13.513.5 | |
실험례 4Experimental Example 4 | 150150 | 93.693.6 | 13.413.4 | |
실험례 5Experiment 5 | 3030 | 89.589.5 | 16.316.3 |
돌출 곡면 경사stick out curved surface slope |
실험례 6Experiment 6 | 5050 | 92.292.2 | 15.415.4 | |
실험례 7Experiment 7 | 7070 | 93.193.1 | 15.115.1 | |
실험례 8Experiment 8 | 9090 | 93.893.8 | 14.714.7 | |
실험례 9Experiment 9 | 110110 | 94.194.1 | 14.414.4 | |
실험례 10Experimental Example 10 | 130130 | 93.993.9 | 14.214.2 | |
실험례 11Experimental Example 11 | 150150 | 92.492.4 | 14.114.1 | |
실험례 12Experiment 12 | 170170 | 91.691.6 | 13.813.8 |
곡률반경 (㎛)radius of curvature (μm) |
정면 상대 휘도(%)face Relative luminance (%) |
60° 측면 상대 휘도(%)60° side Relative luminance (%) |
비고note | |
실험례 13Experimental Example 13 | -- | 92.592.5 | 12.512.5 | 직선Straight |
실험례 14Experimental Example 14 | 5050 | 91.991.9 | 13.013.0 |
함몰 곡면 경사depression curved surface slope |
실험례 15Experimental Example 15 | 100100 | 92.892.8 | 13.613.6 | |
실험례 16Experimental Example 16 | 150150 | 94.194.1 | 13.513.5 | |
실험례 17Experimental Example 17 | 3030 | 88.388.3 | 15.315.3 |
돌출 곡면 경사stick out curved surface slope |
실험례 18Experimental Example 18 | 5050 | 92.092.0 | 15.115.1 | |
실험례 19Experimental Example 19 | 7070 | 93.293.2 | 15.015.0 | |
실험례 20Experimental Example 20 | 9090 | 93.993.9 | 14.814.8 | |
실험례 21Experimental Example 21 | 110110 | 94.394.3 | 14.714.7 | |
실험례 22Experimental Example 22 | 130130 | 94.094.0 | 14.614.6 | |
실험례 23Experiment 23 | 150150 | 92.392.3 | 14.214.2 | |
실험례 24Experimental Example 24 | 170170 | 91.991.9 | 13.913.9 |
곡률반경 (㎛)radius of curvature (μm) |
정면 상대 휘도(%)face Relative luminance (%) |
60° 측면 상대 휘도(%)60° side Relative luminance (%) |
비고note | |
실험례 25Experimental Example 25 | -- | 92.692.6 | 12.812.8 | 직선Straight |
실험례 26Experimental Example 26 | 5050 | 92.292.2 | 13.213.2 |
함몰 곡면 경사depression curved surface slope |
실험례 27Experimental Example 27 | 100100 | 93.193.1 | 13.813.8 | |
실험례 28Experimental Example 28 | 150150 | 94.294.2 | 13.513.5 | |
실험례 29Experimental Example 29 | 3030 | 91.291.2 | 15.515.5 |
돌출 곡면 경사stick out curved surface slope |
실험례 30Experiment 30 | 5050 | 92.292.2 | 15.315.3 | |
실험례 31Experimental Example 31 | 7070 | 92.892.8 | 15.215.2 | |
실험례 32Experimental example 32 | 9090 | 93.693.6 | 14.914.9 | |
실험례 33Experimental Example 33 | 110110 | 94.794.7 | 14.814.8 | |
실험례 34Experimental Example 34 | 130130 | 94.494.4 | 14.514.5 | |
실험례 35Experimental Example 35 | 150150 | 92.592.5 | 14.114.1 | |
실험례 36Experimental Example 36 | 170170 | 91.891.8 | 13.813.8 |
Claims (8)
- 일면에 음각 패턴을 이격시켜 다수를 구비하는 고굴절층; 및A high refractive index layer having a plurality of spaced apart intaglio patterns on one surface; and상기 음각 패턴을 충전하면서 상기 고굴절층의 일면에서 결합하는 저굴절층을 포함하고,Comprising a low-refractive layer coupled on one surface of the high-refractive layer while filling the intaglio pattern,상기 음각 패턴은The engraved pattern is중앙 영역에 함몰되어 수평으로 형성되는 함몰 평탄부; 및a depression flat portion that is depressed in the central region and is formed horizontally; and상기 함몰 평탄부와 상기 고굴절층의 일면 사이에 상기 고굴절층에서 상기 저굴절층으로 돌출하면서 곡면 형태로 경사지는 돌출 곡면 경사부를 포함하는, 명암비 개선 광학 필름.Contrast improvement optical film comprising a protruding curved slope inclined in a curved shape while protruding from the high refractive layer to the low refractive layer between the depressed flat part and one surface of the high refractive layer.
- 제1항에 있어서, 상기 돌출 곡면 경사부는According to claim 1, wherein the protruding curved inclined portion50~150㎛의 곡률반경을 갖는, 명암비 개선 광학 필름.Contrast improvement optical film having a radius of curvature of 50 ~ 150㎛.
- 제2항에 있어서, 상기 음각 패턴은According to claim 2, wherein the engraved pattern장폭을 10~20㎛, 단폭을 5~15㎛로 구성하는, 명암비 개선 광학 필름.Contrast improvement optical film comprising a long width of 10 to 20 μm and a short width of 5 to 15 μm.
- 제2항에 있어서,3. The method of claim 2,정면 상대 휘도는 광학 필름을 적층하기 전 정면 휘도의 92% 이상이고,The front relative luminance is 92% or more of the front luminance before laminating the optical film,60° 측면 상대 휘도는 상기 정면 상대 휘도의 14% 이상인, 명암비 개선 광학 필름.wherein the 60° side relative brightness is at least 14% of the front relative brightness.
- 제2항에 있어서, 3. The method of claim 2,상기 고굴절층은 1.57~1.70의 굴절률을 갖고,The high refractive layer has a refractive index of 1.57 to 1.70,상기 저굴절층은 1.42~1.50의 굴절률을 갖는, 명암비 개선 광학 필름.The low-refractive layer has a refractive index of 1.42 to 1.50, a contrast ratio improvement optical film.
- 제5항에 있어서, 상기 고굴절층과 상기 저굴절층의 굴절률 차이는The method of claim 5, wherein the refractive index difference between the high refractive index layer and the low refractive index layer is0.07~0.28인, 명암비 개선 광학 필름.0.07 to 0.28, contrast-improved optical film.
- 제1항 내지 제6항 중 어느 한 항의 명암비 개선 광학 필름을 포함하는, 편광판.A polarizing plate comprising the optical film of any one of claims 1 to 6 to improve the contrast ratio.
- 제7항에 따른 편광판을 포함하는, 표시 장치.A display device comprising the polarizing plate according to claim 7 .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023524674A JP2023548053A (en) | 2020-11-04 | 2021-10-28 | Optical film that improves contrast ratio |
CN202180074622.7A CN116457707A (en) | 2020-11-04 | 2021-10-28 | Contrast-improving optical film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2020-0145763 | 2020-11-04 | ||
KR1020200145763A KR20220060154A (en) | 2020-11-04 | 2020-11-04 | Optical Film With Improved Contrast Ratio |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022097993A1 true WO2022097993A1 (en) | 2022-05-12 |
Family
ID=81458008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2021/015296 WO2022097993A1 (en) | 2020-11-04 | 2021-10-28 | Optical film for improving contrast ratio |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2023548053A (en) |
KR (1) | KR20220060154A (en) |
CN (1) | CN116457707A (en) |
WO (1) | WO2022097993A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160252665A1 (en) * | 2015-02-27 | 2016-09-01 | Samsung Sdi Co., Ltd. | Polarizing plate and liquid crystal display comprising the same |
KR20170091453A (en) * | 2016-02-01 | 2017-08-09 | 삼성에스디아이 주식회사 | Composite polarizing plate, module for liquid crystal display apparatus comprising the same and liquid crystal display apparatus comprising the same |
KR20190113464A (en) * | 2018-03-28 | 2019-10-08 | 삼성에스디아이 주식회사 | Optical film for improving visibility, polarizing plate comprising the same and flexible optical display apparatus comprising the same |
KR20190133196A (en) * | 2017-04-19 | 2019-12-02 | 다이니폰 인사츠 가부시키가이샤 | Optical structures and displays |
KR20200113625A (en) * | 2019-03-26 | 2020-10-07 | 동우 화인켐 주식회사 | Optical Film Improving Contrast Ratio and Display Having the Same |
-
2020
- 2020-11-04 KR KR1020200145763A patent/KR20220060154A/en active Search and Examination
-
2021
- 2021-10-28 JP JP2023524674A patent/JP2023548053A/en active Pending
- 2021-10-28 WO PCT/KR2021/015296 patent/WO2022097993A1/en active Application Filing
- 2021-10-28 CN CN202180074622.7A patent/CN116457707A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160252665A1 (en) * | 2015-02-27 | 2016-09-01 | Samsung Sdi Co., Ltd. | Polarizing plate and liquid crystal display comprising the same |
KR20170091453A (en) * | 2016-02-01 | 2017-08-09 | 삼성에스디아이 주식회사 | Composite polarizing plate, module for liquid crystal display apparatus comprising the same and liquid crystal display apparatus comprising the same |
KR20190133196A (en) * | 2017-04-19 | 2019-12-02 | 다이니폰 인사츠 가부시키가이샤 | Optical structures and displays |
KR20190113464A (en) * | 2018-03-28 | 2019-10-08 | 삼성에스디아이 주식회사 | Optical film for improving visibility, polarizing plate comprising the same and flexible optical display apparatus comprising the same |
KR20200113625A (en) * | 2019-03-26 | 2020-10-07 | 동우 화인켐 주식회사 | Optical Film Improving Contrast Ratio and Display Having the Same |
Also Published As
Publication number | Publication date |
---|---|
KR20220060154A (en) | 2022-05-11 |
JP2023548053A (en) | 2023-11-15 |
CN116457707A (en) | 2023-07-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9097829B2 (en) | Backlight unit with patterned light guide panel | |
WO2016175580A1 (en) | Optical film for improving contrast ratio, polarizing plate including same, and liquid crystal display device including same | |
WO2015084018A1 (en) | Optical member and display apparatus having same | |
EP0658254B1 (en) | Display device | |
WO2012047052A2 (en) | Slim type touch panel and mobile terminal including the same | |
WO2018212528A1 (en) | Polarizing plate and optical display device including same | |
WO2015105317A1 (en) | Optical sheet assembly and back-light unit comprising same | |
WO2018080036A1 (en) | Polarizing plate and liquid crystal display device comprising same | |
WO2013035909A1 (en) | Back light unit within resin layer for light-guide and lcd using the same | |
WO2009108003A1 (en) | Optical sheet and liquid crystal display equipped with the same | |
WO2022097993A1 (en) | Optical film for improving contrast ratio | |
WO2011062461A2 (en) | Integrated optical sheet and optical device including same | |
WO2016117931A1 (en) | Optical sheet for backlight unit and method for manufacturing same | |
WO2022149799A1 (en) | Brightness enhancement film | |
KR102514151B1 (en) | Polarizing plate and optical display apparatus comprising the same | |
KR100988764B1 (en) | Multi-functional optic film | |
WO2013051872A2 (en) | Surface light source device | |
WO2014185734A1 (en) | Composite optical sheet and optical display device including same | |
WO2013055112A1 (en) | Optical sheet structure | |
WO2018008938A1 (en) | Optical sheet, back light unit, and display device including same | |
WO2010058999A2 (en) | Optical sheet and backlight unit furnished with same | |
WO2023003207A1 (en) | Light guide plate using grouping pattern and display device comprising same | |
KR20190087914A (en) | Module for liquid crystal display apparatus and liquid crystal display apparatus comprising the same | |
WO2013100482A1 (en) | Light guide plate and backlight unit including same | |
KR101370167B1 (en) | Backlight unit assembly |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21889458 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023524674 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180074622.7 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21889458 Country of ref document: EP Kind code of ref document: A1 |