WO2010064431A1 - Réflecteur de lumière et dispositif de source lumineuse plane l'utilisant - Google Patents

Réflecteur de lumière et dispositif de source lumineuse plane l'utilisant Download PDF

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Publication number
WO2010064431A1
WO2010064431A1 PCT/JP2009/006577 JP2009006577W WO2010064431A1 WO 2010064431 A1 WO2010064431 A1 WO 2010064431A1 JP 2009006577 W JP2009006577 W JP 2009006577W WO 2010064431 A1 WO2010064431 A1 WO 2010064431A1
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WIPO (PCT)
Prior art keywords
layer
light reflector
light
brightness enhancement
filler
Prior art date
Application number
PCT/JP2009/006577
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English (en)
Japanese (ja)
Inventor
廣井洋介
上田隆彦
Original Assignee
株式会社ユポ・コーポレーション
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Priority to CN200980148738XA priority Critical patent/CN102239433A/zh
Publication of WO2010064431A1 publication Critical patent/WO2010064431A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements

Definitions

  • the surface treatment agent examples include resin acids, fatty acids, organic acids, sulfate ester type anionic surfactants, sulfonic acid type anionic surfactants, petroleum resin acids, salts thereof such as sodium, potassium, and ammonium, or these Fatty acid esters, resin acid esters, waxes, paraffins, and the like are preferred, and nonionic surfactants, diene polymers, titanate coupling agents, silane coupling agents, phosphoric acid coupling agents, and the like are also preferred.
  • sulfate-type anionic surfactants include long-chain alcohol sulfates, polyoxyethylene alkyl ether sulfates, sulfated oils, and their salts such as sodium and potassium.
  • the average particle diameter of the inorganic filler or the average dispersed particle diameter of the organic filler is preferably in the range of 0.05 to 1.5 ⁇ m. Preferably, those in the range of 0.1 to 1.3 ⁇ m are used. If a filler having an average particle diameter or an average dispersed particle diameter of 1.5 ⁇ m or less is used, the pores tend to be more uniform. Moreover, when a filler having an average particle diameter or an average dispersed particle diameter of 0.05 ⁇ m or more is used, there is a tendency that predetermined holes are more easily obtained.
  • the brightness enhancement layer (II) When the brightness enhancement layer (II) is composed of two or more layers, the brightness enhancement layer includes at least one brightness enhancement layer that contributes to brightness enhancement (when the brightness enhancement layer (II) is a single layer, the brightness enhancement layer ( II) is the brightness improvement layer).
  • the thickness of the brightness improving layer is preferably 3 to 150 ⁇ m, more preferably 4 to 95 ⁇ m, still more preferably 5 to 70 ⁇ m, and particularly preferably 15 to 70 ⁇ m.
  • the same thermoplastic resin and filler as those used for the reflective layer (I) can be used.
  • the filler to be used preferably has an average particle size of 0.05 to 1.5 ⁇ m in the case of an inorganic filler, and preferably has an average dispersed particle size of 0.05 to 1.5 ⁇ m in the case of an organic filler. If the particle size is 1.5 ⁇ m or less, it is advantageous in that holes are easily formed and the reflectance of the luminance improving layer is easily improved.
  • the blending amount of the filler in the stretched film constituting the brightness enhancement layer is preferably 5 to 90% by weight, more preferably 5 to 80% by weight, and still more preferably. 5 to 70% by weight.
  • the blending amount of the filler is 5% by weight or more, the brightness improvement performance is easily imparted, and therefore, a better brightness improvement performance tends to be obtained.
  • the blending amount is 90% by weight or less, stretch molding described later is easy and suitable for film molding.
  • the intermediate layer may or may not contain the filler.
  • it may consist only of a thermoplastic resin.
  • the filler content is preferably 0.1 to 90% by weight, more preferably 0.3 to 85% by weight, and 0.5 to 75% by weight. % Is more preferable.
  • the content is preferably 0.1 to 20% by weight, more preferably 0.3 to 15% by weight, More preferably, it is 5 to 10% by weight.
  • the light reflector of the present invention may be one in which a surface layer (III) is further provided on the surface of the reflective layer (I) opposite to the brightness enhancement layer (II).
  • the surface of the surface layer (III) becomes the light incident surface of the light reflector.
  • the surface layer (III) is preferably provided for the purpose of preventing the light reflector from being damaged by improving the surface strength and preventing the light reflector from being deteriorated by light. Further, the surface layer (III) is provided so that the reflectance and luminance of the surface of the light reflector do not fall below the range of the present invention.
  • the surface layer (III) has a structure that does not obstruct reflected light from the reflective layer (I) as much as possible.
  • the same thermoplastic resin as that used for the reflective layer (I) can be used.
  • the surface layer (III) may contain the filler.
  • the filler content is preferably 0.1 to 90% by weight, more preferably 0.3 to 80% by weight, More preferably, it is ⁇ 75% by weight.
  • the content is preferably 0.1 to 20% by weight, more preferably 0.3 to 15% by weight, More preferably, it is 5 to 10% by weight.
  • the content when a filler having a low refractive index such as calcium carbonate is used as the filler is preferably 1 to 90% by weight, more preferably 3 to 80% by weight, and 5 to 75% by weight. % Is more preferable.
  • the thermoplastic resin it is preferable to use a resin such as a polyolefin-based resin that has little discoloration due to light deterioration from the viewpoint of easily preventing a decrease in luminance over time.
  • the laminated film constituting the light reflector of the present invention may be composed of only the reflective layer (I) and the brightness enhancement layer (II), or the surface layer (III) / reflective layer ( It may have a structure of I) / brightness enhancement layer (II).
  • the light reflector of the present invention having 2 to 5 layers among the reflective layer (A), the luminance improving layer (B), the outermost surface layer (C), the intermediate layer (D1), and the intermediate layer (D2). A specific layer structure is illustrated.
  • the reflective layer (A), the luminance improving layer (B), the outermost surface layer (C), the intermediate layer (D1), and the intermediate layer (D2) are each a single layer, and the luminance improving layer (B) and the intermediate layer (D2) Constitutes the brightness enhancement layer (II), and the outermost surface layer (C) and the intermediate layer (D1) constitute the surface layer (III).
  • the first layer described below is a light incident surface.
  • a general resin film laminating method and stretching method can be used as a method for forming the laminated film constituting the light reflector of the present invention.
  • the laminating method include co-extrusion method in which a multilayer sheet is obtained by laminating molten resin inside a die using a multi-layer T die or I die, and extruding it into a sheet shape, and a plurality of T dies. And a lamination method of obtaining a multilayer sheet by laminating a molten resin on another sheet using an I die.
  • the reflective layer (I) and the brightness enhancement layer (II) have different numbers of stretching axes
  • the latter lamination is used when forming a laminate including the reflection layer (I) and the brightness enhancement layer (II).
  • a laminated film is formed using the method.
  • a molten resin is extruded into a sheet using a single-layer or multilayer T-die or I-die connected to a screw-type extruder, and this sheet is then rolled around a roll group.
  • the reflective layer (I) and the brightness enhancement layer (II) have different numbers of stretching axes, and therefore, sequential biaxial stretching that combines longitudinal stretching using the peripheral speed difference of the roll group and transverse stretching using a tenter oven.
  • the method is most preferably used.
  • a method of sequentially extruding and laminating and laminating this laminate further in a direction uniaxially stretched in a direction perpendicular to the stretching direction; each of the reflective layer (I), the brightness enhancement layer (II), and the surface layer (III)
  • a method in which the raw resin is individually stretched and then bonded directly or via an easy-adhesion layer; a reflective layer (I) made of a biaxially stretched film and a brightness enhancement layer made of a uniaxially stretched film by any of the above methods After forming the laminate of II), a method of bonding a film of the surface layer (III) prepared separately to the reflective layer (I) side directly or via an easy adhesion layer can be used.
  • the draw ratio of the brightness enhancement layer (II) made of a uniaxially stretched film is preferably in the range of 3 to 20 times, more preferably in the range of 4 to 18 times, still more preferably in the range of 5 to 16 times, and most preferably in the range of 6 to 12 times.
  • the draw ratio is in the range of 3 to 20 times, it is easy to form spindle-shaped pores having a high light scattering effect, and brightness enhancement performance can be imparted to the stretched layer.
  • the density of the laminated film used in the present invention is generally in the range of 0.4 to 1.3 g / cm 3 , and preferably in the range of 0.5 to 0.9 g / cm 3 .
  • the density of the laminated film used in the present invention is measured according to JIS-P8118.
  • the density of the reflective layer (I) is such that the brightness enhancement layer (II) is peeled off from the laminated film (similarly when there is a surface layer (III)), and only the reflective layer (I) is used. It calculated
  • the filler content of the laminated film used in the present invention is preferably 5 to 75% by weight, more preferably 15 to 65% by weight, still more preferably 25 to 55% by weight, Particularly preferred is 35 to 45% by weight. By setting the filler content in the same range, the porosity and density can be easily controlled when the laminated film is molded as described above.
  • the light reflector of this invention consists of said laminated
  • the reflectance of the light incident surface (the surface of the reflective layer (I) or the surface layer (III)) of the light reflector of the present invention measured using 600 nm wavelength light based on the method described in condition d of JIS-Z8722 is 98%. ⁇ 100%. If the reflectance at the light incident surface of the laminated film is less than 98%, the luminance tends to decrease, such being undesirable.
  • the brightness of the light reflector of the present invention can be measured by a test method described later.
  • the actually measured luminance value of the light reflector of the present invention based on the test method is preferably 315 to 343 cd, more preferably 315 to 338 cd, and still more preferably 318 to 328 cd.
  • the luminance of the light reflector in the present invention is evaluated by a relative luminance value calculated with the measured luminance value (298 cd based on the test method) of YUPO FPG300 (trade name) manufactured by YUPO Corporation as 100%. Yes.
  • the relative luminance value of the light incident surface (the surface of the reflective layer (A) or the outermost surface layer (C)) of the light reflector of the present invention is 106% to 115%, preferably 106% to 112%. % To 110% is more preferable. If the relative luminance value is less than 106%, the luminance improvement effect by the luminance enhancement layer (II) is hardly obtained, and the improvement effect is not much as compared with the conventional product.
  • the shape of the light reflector of the present invention is not particularly limited, and can be appropriately determined according to the purpose of use and the mode of use. Usually, it is used in the form of a plate or film, but even if it is used in other shapes, it is included within the scope of the present invention as long as it is used as a light reflector.
  • a surface light source device can be manufactured using the light reflector of this invention.
  • the specific configuration of the surface light source device of the present invention is not particularly limited.
  • a typical surface light source device for example, a direct type backlight as shown in FIG. 6 and a sidelight type backlight as shown in FIG. 7 can be exemplified.
  • the light-incidence surface (reflective layer (I) surface or surface layer (III) surface) side of the light reflector of this invention may face the light source of a surface light source device.
  • the light reflector of the present invention is extremely useful as a light reflector constituting a direct backlight.
  • the surface light source device of the present invention can be suitably arranged on a liquid crystal display or the like. When applied to a liquid crystal display, it is possible to maintain good image quality and brightness over a long period of time.
  • the light reflector of the present invention can be used not only in a surface light source device using such a built-in light source but also in a low power consumption type display device intended to reflect room light. Further, it can be widely used as a back reflector of an illuminating device such as a light source for indoor / outdoor lighting and an electric signboard.
  • Example 1 A composition (A) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was melt-kneaded using an extruder set at 250 ° C. Thereafter, the composition was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain an unstretched sheet. After re-heating the unstretched sheet to 145 ° C., a number of Russia - was obtained in the longitudinal direction by utilizing the peripheral speed difference between group Le a stretched sheet was stretched to the ratio L MD described in Table 2.
  • the compositions (B), (C), and (D) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 were individually melt-kneaded using three extruders set at 250 ° C.
  • composition (B) is melt-extruded on one side of the obtained stretched sheet, and the compositions (C) and (D) are melt-extruded on the other side and laminated so as to be C / D / A / B. did. Subsequently, this laminate was reheated to 160 ° C., and then stretched in the transverse direction to a magnification L CD described in Table 2 using a tenter.
  • Example 2 A composition (A) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was melt-kneaded using an extruder set at 250 ° C. Thereafter, the composition was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain an unstretched sheet. After re-heating the unstretched sheet to 145 ° C., to obtain a stretched sheet in the longitudinal direction by utilizing the peripheral speed difference between a number of rolls and stretched in ratio L MD described in Table 2.
  • composition (B) obtained by mixing the materials shown in Table 1 with the composition shown in Table 2 was melt-kneaded using an extruder set at 250 ° C., and the composition (B ) Was melt-extruded and laminated so as to be A / B. Subsequently, this laminate was reheated to 160 ° C., and then stretched in the transverse direction to a magnification L CD described in Table 2 using a tenter. Then, after annealing this at 160 degreeC, it cools to 60 degreeC, slits the ear
  • Example 3 A light reflector was obtained in the same manner as in Example 1 except that a composition obtained by mixing the materials shown in Table 1 with the composition shown in Table 2 was used.
  • Example 4 A composition (A) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was melt-kneaded using an extruder set at 250 ° C. Thereafter, the composition was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain an unstretched sheet. After re-heating the unstretched sheet to 145 ° C., to obtain a stretched sheet in the longitudinal direction by utilizing the peripheral speed difference between a number of rolls and stretched in ratio L MD described in Table 2. Further, the compositions (B) and (D) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 were obtained by individually melt-kneading them using two extruders set at 250 ° C.
  • compositions (B) and (D) were melt coextruded on one side of the stretched sheet and laminated so as to be A / D / B. Subsequently, this laminate was reheated to 160 ° C., and then stretched in the transverse direction to a magnification L CD described in Table 2 using a tenter. Then, after annealing this at 160 degreeC, it cooled to 60 degreeC, the ear
  • the intermediate layer (D) / luminance improving layer (B) corresponds to the luminance enhancing layer (II) of the present invention.
  • This laminated film was used as a light reflector.
  • Example 5 A composition (A) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was melt-kneaded using an extruder set at 250 ° C. Thereafter, the composition was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain an unstretched sheet. After re-heating the unstretched sheet to 145 ° C., to obtain a stretched sheet in the longitudinal direction by utilizing the peripheral speed difference between a number of rolls and stretched in ratio L MD described in Table 2. Moreover, the composition (B) and (C) which mixed the material of Table 1 by the mixing
  • Example 6 A composition (A) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was melt-kneaded using an extruder set at 250 ° C. Thereafter, the composition was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain an unstretched sheet. After re-heating the unstretched sheet to 145 ° C., to obtain a stretched sheet in the longitudinal direction by utilizing the peripheral speed difference between a number of rolls and stretched in ratio L MD described in Table 2.
  • the compositions (B), (C), and (D) obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 were individually melt-kneaded using four extruders set at 250 ° C.
  • compositions (B) and (D) are melt coextruded on one side of the obtained stretched sheet, and the compositions (C) and (D) are melt coextruded on the other side to obtain C / D / A / D. It was laminated so as to be / B. Subsequently, this laminate was reheated to 160 ° C., and then stretched in the transverse direction to a magnification L CD described in Table 2 using a tenter.
  • the outermost surface layer (C) / intermediate layer (D) / reflective layer which has the thickness of Table 2 A laminated film having a five-layer structure comprising A) / intermediate layer (D) / luminance improving layer (B) was obtained (FIG. 5).
  • the outermost surface layer (C) / intermediate layer (D) corresponds to the surface layer (III) of the present invention
  • the intermediate layer (D) / luminance improving layer (B) is the luminance enhancing layer (II) of the present invention. It corresponds to.
  • This laminated film was used as a light reflector.
  • Example 7 to 12 In each of Examples 7 to 12, a composition prepared by mixing the materials shown in Table 1 with the formulation shown in Table 2 was used. Examples 7 and 8 were produced in the same manner as Example 6, Example 9 was produced in the same manner as Example 1, Example 10 was produced in the same manner as Example 5, and Example 11 was in Example. 3 and manufactured in the same manner as in Example 4 to obtain respective light reflectors. The conditions described in Table 2 were adopted for the draw ratio.
  • Example 2 A light reflector was obtained in the same manner as in Example 4 except that a composition obtained by mixing the materials shown in Table 1 with the formulation shown in Table 2 was used.
  • this stretched sheet was reheated to 160 ° C., and then stretched in the transverse direction to a magnification L CD described in Table 2 using a tenter. Then, after annealing this at 160 degreeC, it cools to 60 degreeC, slits the ear
  • a laminated film with a structure was obtained. This laminated film was used as a light reflector.
  • Comparative Examples 4 to 8 In each of Comparative Examples 4 to 8, a composition prepared by mixing the materials shown in Table 1 with the formulation shown in Table 2 was used. Comparative Example 4 was produced in the same manner as Example 4, Comparative Example 5 was produced in the same manner as Example 1, Comparative Example 6 was produced in the same manner as Example 5, and Comparative Example 7 was produced in Example 3. In the same manner as in Example 4, the light reflectors were obtained in the same manner as in Example 4. The conditions described in Table 2 were adopted for the draw ratio.
  • Thickness The thickness of the laminated film in the present invention was measured using a thickness meter in accordance with JIS-P8118. The thickness of each of the reflective layer (A), the brightness improving layer (B), the outermost surface layer (C), and the intermediate layer (D) is such that each laminated film is cooled to a temperature of ⁇ 60 ° C.
  • Reflectivity of light reflector The reflectivity of the reflective layer (I) side surface of the laminated film in the present invention is measured on the surface of the reflective layer (A) or the outermost surface layer (C) which becomes the light incident surface of the light reflector.
  • the surface was measured using light source light having a wavelength of 600 nm in accordance with the method described in condition d of JIS-Z8722. Table 3 shows the measurement results.
  • the reflectance of the brightness enhancement layer (II) in the present invention is the brightness when the reflective layer (A) and the brightness enhancement layer (B) are in direct contact with each other in the laminated film.
  • the improvement layer (B) is provided and an intermediate layer (D) is provided between the reflection layer (A) and the luminance improvement layer (B)
  • the intermediate layer (D) and the luminance improvement layer (B) The two layers were peeled from the reflective layer (A), and the surface that was in contact with the reflective layer (A) was used as the measurement surface, and measurement was performed using light source light having a wavelength of 600 nm in accordance with the method described in condition d of JIS-Z8722. Table 3 shows the measurement results.
  • Luminance of light reflector A 21-inch size surface light source device was used in the direct backlight type illustrated in FIG.
  • a direct-type backlight device built in a Sony liquid crystal TV (trade name: BRAVIA KDL-20J3000) was used, and the light reflector was replaced to perform the test.
  • the distance a between the centers of adjacent light sources (cold cathode lamps) 15 is 24 mm
  • the distance b from the lower surface of the diffusion plate 14 to the center of the light source 15 is 21 mm
  • the distance c is 3.5 mm.
  • the light reflector obtained in each example and comparative example and the YUPO FPG300 (manufactured by YUPO Corporation) are placed at the position 11 in the figure.
  • the product name was set so that the light incident surface was on the light source 11 side, and light was irradiated from the light source for 30 minutes.
  • Luminance is measured at a position where the distance from the light emitting surface 17 is 120 cm in the normal direction of the light emitting surface 17 of the surface light source device (product name: RISA-COLOER, manufactured by Highland).
  • the light reflectors of Examples 1 to 12 were used in an environment of 83 ° C. and 50% relative humidity using a super accelerated weathering tester (manufactured by Daipura Wintes Co., Ltd., trade name: METALWEATHER). Even after irradiating ultraviolet rays with an illuminance of 90 mW / cm 2 from a metal halide light source for 100 hours, no change in color tone such as yellowing was observed.
  • the light reflector of the present invention As described above, according to the light reflector of the present invention, excellent luminance and reflectance can be achieved without relying on components having optical characteristics.
  • the surface light source device manufactured using the light reflector of the present invention is extremely useful because it can easily maintain high luminance even when the output of the light source lamp is reduced or the number of light source lamps is reduced.

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  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention porte sur un réflecteur de lumière constitué d'un film stratifié possédant une structure obtenue par superposition de couches : une couche d'augmentation de luminosité (II), formée d'un film étiré selon un axe unique et contenant une résine thermoplastique, et une matière de remplissage ; et une couche de réflexion (I) constituée d'un film étiré selon deux axes et contenant une résine thermoplastique et une matière de remplissage. La couche d'augmentation de luminosité (II) possède un coefficient de réflexion situé dans la plage de 60 à 100 %. La surface du réflecteur de lumière du côté de la couche de réflexion (I) possède un coefficient de réflexion situé dans la plage de 98 à 100 % et une valeur de luminosité relative située dans la plage de 106 à 115 cd/m2.
PCT/JP2009/006577 2008-12-04 2009-12-03 Réflecteur de lumière et dispositif de source lumineuse plane l'utilisant WO2010064431A1 (fr)

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CN200980148738XA CN102239433A (zh) 2008-12-04 2009-12-03 光反射体以及使用其的面光源装置

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JP2008-309886 2008-12-04
JP2008309886 2008-12-04

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JP (1) JP2010156966A (fr)
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WO2012091481A2 (fr) * 2010-12-31 2012-07-05 코오롱인더스트리 주식회사 Film améliorant la luminosité et unité de rétroéclairage comprenant ledit film
KR101249656B1 (ko) * 2010-12-31 2013-04-01 코오롱인더스트리 주식회사 휘도증강필름 및 이를 포함하는 백라이트 유닛
CN106908989B (zh) * 2016-01-13 2020-09-01 宁波长阳科技股份有限公司 一种分层叠合反射膜的制造方法
CN107092046A (zh) * 2017-04-26 2017-08-25 上海默奥光学薄膜器件有限公司 一种宽光谱高反光镜

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JP2010156966A (ja) 2010-07-15

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