WO2016031830A1 - Feuille de verre - Google Patents

Feuille de verre Download PDF

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Publication number
WO2016031830A1
WO2016031830A1 PCT/JP2015/073905 JP2015073905W WO2016031830A1 WO 2016031830 A1 WO2016031830 A1 WO 2016031830A1 JP 2015073905 W JP2015073905 W JP 2015073905W WO 2016031830 A1 WO2016031830 A1 WO 2016031830A1
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WIPO (PCT)
Prior art keywords
light
glass
less
main surface
glass plate
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PCT/JP2015/073905
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English (en)
Japanese (ja)
Inventor
鈴木　克巳
和矢 竹本
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旭硝子株式会社
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Publication of WO2016031830A1 publication Critical patent/WO2016031830A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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

Definitions

  • the present invention relates to a glass plate suitably used as a light guide plate of an edge light type planar light emitting device.
  • liquid crystal display devices have been used for mobile phones, PDAs, liquid crystal televisions, and the like.
  • the liquid crystal display device has a basic configuration of a planar light emitting device as a backlight and a liquid crystal unit disposed on the light emitting surface side of the planar light emitting device.
  • the planar light emitting device there are a direct type and an edge light type.
  • the direct type the light source is arranged on the back surface opposite to the light emitting surface, and therefore a light source having the same size as the light emitting surface is required.
  • the edge light type is suitable for increasing the screen of a liquid crystal display device because a light source is disposed on a side surface that is orthogonal to the light emitting surface, so that a light source having a smaller size than the light emitting surface can be used.
  • planar light emitting device also has a demand as a planar lighting device disposed indoors or outdoors such as a ceiling, floor or wall of a building.
  • Reflecting member 300 for returning light emitted from the light reflecting surface (lower surface in the figure) opposite to the light emitting surface (upper surface in the figure) that emits light to the light guide plate 200, and its interior
  • the brightness is uneven on the light exit surface when the light source is a point light source, and the brightness unevenness on the light exit surface due to the difference in distance from the light source It is comprised by the scattering member 400 which suppresses etc.
  • the reflection member 300 is a plate-like member arranged so that its main surface faces the light reflection surface of the light guide plate 200.
  • the scattering member 400 is formed on the light reflection surface of the light guide plate 200 at a predetermined interval in a dot pattern so as to be positioned between the light guide plate 200 and the reflection member 300.
  • the light guide plate 200 of the light guide plate unit 100 is conventionally made of a transparent resin material such as an acrylic resin or a polycarbonate resin because of its high transmittance, relatively low cost and easy availability. (See Patent Document 1).
  • the planar light emitting device In order to cope with an increase in the screen size of the liquid crystal display device, when the planar light emitting device is enlarged, a light source with higher output is used. As a result, the amount of heat generated by the light source increases and the light guide plate is also required to have heat resistance.
  • the above light guide plate made of a resin material has insufficient heat resistance because the glass transition point (Tg) is as low as 80 to 100 ° C. (acrylic resin) and 145 to 150 ° C. (polycarbonate resin).
  • the bubbles present inside the light guide plate made of a resin material are effective in improving front luminance and uniform luminance by acting as an optical path changing element if the pore diameter and porosity are appropriate.
  • the bubbles present inside the light guide plate made of a resin material are usually spherical.
  • the size of bubbles present in the molten glass is various, and as described above, measures are taken to reduce the amount of bubbles present in the glass plate during the production of the glass plate. Therefore, it is preferable that bubbles existing inside the glass plate used as the light guide plate do not affect the optical characteristics of the light guide plate, rather than expecting an action as an optical path changing element.
  • the present invention is a glass having high transparency in the visible light region and high luminance uniformity when used as a light guide plate of an edge light type planar light emitting device.
  • the purpose is to provide a board.
  • the maximum value ⁇ max of the light absorption coefficient in the wavelength range of 400 to 700 nm is preferably 1 m ⁇ 1 or less, more preferably 0.5 m ⁇ 1 or less, and even more preferably 0. .2m -1 or less.
  • ⁇ max is 1 m ⁇ 1 or less, the front luminance can be improved when used as a light guide plate.
  • the first main surface and the second main surface are substantially rectangular, the length of at least one side is 200 mm or more, and the thickness of the glass plate is 0.5 to 10 mm.
  • the thickness tolerance of the glass is preferably within ⁇ 0.1 mm.
  • the glass plate of the present invention preferably has an average luminance L ave of 1000 cd / m 2 or more in the light emitted from the second main surface.
  • the glass plate of the present invention has high transparency in the visible light region and high uniformity of brightness when used as a light guide plate of an edge light type planar light emitting device. It is suitable as a light guide plate.
  • FIG. 3 is a perspective view showing one structural example of the glass plate of the present invention.
  • the glass plate 10 shown in FIG. 3 includes a first main surface 11, a second main surface 12 facing the first main surface 11, and an end face 13 connecting the first main surface 11 and the second main surface 12.
  • the first main surface 11 and the second main surface 12 are substantially rectangular.
  • the shapes of the first main surface and the second main surface are not substantially limited to rectangles, and may be other shapes.
  • the first main surface 11 and the second main surface 12 in the glass plate of the present invention specify the two main surfaces of the glass plate for convenience in order to specify the side on which the reflecting member and the scattering member are arranged at the time of luminance measurement.
  • the first main surface 11 and the second main surface 12 are defined. Therefore, either surface of the two main surfaces of the glass plate may be the first main surface (second main surface).
  • the first main surface 11 and the second main surface 12 have a rectangular shape, but the first main surface 11 and the second main surface 12 may have a square shape. Good. Further, a notch may be provided for fixing in the case frame.
  • the length of one side of the main surface (first main surface 11 and second main surface 12) of the glass plate is a planar light emission using the glass plate of the present invention as a light guide plate. It depends on the dimensions of the device.
  • the length of one side of the main surface (first main surface 11 and second main surface 12) of the glass plate is preferably 200 mm or more, and 250 mm. More preferably, it is more preferably 400 nm or more.
  • the thickness of the glass plate (the thickness of the end face 13) is preferably 0.5 to 10 mm.
  • the internal transmittance of the glass plate used as the light guide plate is affected by the thickness of the glass member.
  • the thickness of the glass plate is 0.5 mm or more
  • the number of reflections on the glass surface is prevented from increasing, the attenuation due to reflection increases, and the internal transmittance at the effective optical path length is increased. It can be prevented from lowering. More preferably, it is 1 mm or more, More preferably, it is 1.5 mm or more.
  • the thickness tolerance of the glass plate is preferably within ⁇ 0.1 mm, more preferably within ⁇ 0.08 mm, and even more preferably within ⁇ 0.05 mm.
  • the tolerance of the thickness of the glass plate is within ⁇ 0.1 mm, it is possible to stabilize the light incident from the light source to the glass plate and improve the in-plane luminance uniformity. .
  • the glass plate 10 of the present invention is used as a light guide plate of an edge light type planar light emitting device, it is preferable that the light absorption coefficient is low in the wavelength range of the light source of the planar light emitting device.
  • a light-emitting diode (LED) is used as a light source, specifically, R (red), G (green) and B (blue) LEDs are used. Is done. Therefore, it is preferable that the absorption coefficient of light of these three colors is low.
  • the glass plate 10 of the present invention has a light absorption coefficient of 1 m ⁇ 1 or less at a wavelength of 550 nm, a maximum value ⁇ max (m ⁇ 1 ) of a light absorption coefficient in a wavelength range of 400 to 700 nm, and a minimum value ⁇ min.
  • the ratio ( ⁇ max / ⁇ min ) to (m ⁇ 1 ) is 10 or less.
  • the absorption coefficient of light having a wavelength of 550 nm is preferably 0.5 m ⁇ 1 or less, more preferably 0.2 m ⁇ 1 or less, and even more preferably 0.1 m ⁇ 1 or less.
  • the ( ⁇ max / ⁇ min ) is preferably 7 or less, more preferably 5 or less, and further preferably 4 or less.
  • the maximum value ⁇ max of the light absorption coefficient in the wavelength range of 400 to 700 nm is preferably 1 m ⁇ 1 or less, more preferably 0.5 m ⁇ 1 or less, and still more preferably. 0.2 m ⁇ 1 or less.
  • ⁇ max is 1 m ⁇ 1 or less, the front luminance can be improved.
  • the total amount A of iron in the glass used as the glass plate 10 is preferably 100 ppm by mass or less in order to satisfy the above-described average internal transmittance at a wavelength of 400 to 700 nm at a length of 50 mm, and 40 ppm by mass. More preferably, it is more preferably 20 ppm by mass or less.
  • the total amount A of the iron content of the glass used as the glass plate 10 is preferably 5 ppm by mass or more in order to improve the meltability of the glass during the production of the multicomponent oxide glass, It is more preferably 8 ppm by mass or more, and further preferably 10 ppm by mass or more.
  • the total amount A of iron content of the glass used as the glass plate 10 can be adjusted by the amount of iron added at the time of glass production.
  • the total iron content A of the glass is expressed as the content of Fe 2 O 3 , but all the iron present in the glass exists as Fe 3+ (trivalent iron). I don't mean. Usually, Fe 3+ and Fe 2+ (divalent iron) are simultaneously present in the glass.
  • Fe 2+ and Fe 3+ have absorption in the wavelength range of 400 to 700 nm, but the absorption coefficient of Fe 2+ (11 cm ⁇ 1 Mol ⁇ 1 ) is more than that of Fe 3+ (0.96 cm ⁇ 1 Mol ⁇ 1 ). Therefore, the internal transmittance at a wavelength of 400 to 700 nm is further reduced. Therefore, a low content of Fe 2+ is preferable for increasing the internal transmittance at a wavelength of 400 to 700 nm.
  • the Fe 2+ content B of the glass used as the glass plate 10 is preferably 20 ppm by mass or less in order to satisfy the above-described average internal transmittance in the visible light region with the effective optical path length, and 10 ppm by mass or less. More preferably, it is more preferably 5 ppm by mass or less.
  • the Fe 2+ content B of the glass used as the glass plate 10 is preferably 0.01 mass ppm or more in order to improve the meltability of the glass during the production of multi-component oxide glass. 0.05 mass ppm or more is more preferable, and 0.1 mass ppm or more is further preferable.
  • the content A of Fe 2 O 3 was determined by fluorescent X-ray measurement, a content of total iron as calculated as Fe 2 O 3 (mass ppm).
  • the content B of Fe 2+ is measured according to ASTM C169-92 (2011). The measured Fe 2+ content is expressed in terms of Fe 2 O 3 .
  • One structural example (Structural Example A) of the glass used as the glass plate 10 is a mass percentage display based on an oxide, and SiO 2 is 60 to 80%, Al 2 O 3 is 0 to 7%, and MgO is 0 to 10%. %, CaO 0-20%, SrO 0-15%, BaO 0-15%, Na 2 O 3-20%, K 2 O 0-10%, Fe 2 O 3 5-100 mass Contains ppm.
  • FIG. 1 Another structural example (Structural Example B) of the glass used as the glass plate 10 is an oxide-based mass percentage display, with SiO 2 being 45-80%, Al 2 O 3 being more than 7% but not more than 30%, B 2 O 3 0-15%, MgO 0-15%, CaO 0-6%, SrO 0-5%, BaO 0-5%, Na 2 O 7-20%, K 2 O 0-10%, ZrO 2 0-10% and Fe 2 O 3 5-100 mass ppm.
  • SiO 2 being 45-80%
  • Al 2 O 3 being more than 7% but not more than 30%
  • B 2 O 3 0-15% MgO 0-15%
  • CaO 0-6% SrO 0-5%
  • BaO 0-5% Na 2 O 7-20%
  • K 2 O 0-10% K 2 O 0-10%
  • ZrO 2 0-10% ZrO 2 0-10%
  • Fe 2 O 3 5-100 mass ppm Another structural example (Stural Example B) of the
  • Still another structural example (Structural Example C) of the glass used as the glass plate 10 is an oxide-based mass percentage display, 45 to 70% of SiO 2 , 10 to 30% of Al 2 O 3 , B 2 0 to 15% of O 3 , 5 to 30% in total of MgO, CaO, SrO and BaO, 0% or more and less than 3% in total of Li 2 O, Na 2 O and K 2 O, Fe 2 O 3 Contains 5 to 100 ppm by mass.
  • composition range of each component of the glass composition of the glass plate 10 of the present embodiment having the above-described components will be described below.
  • the unit of the content of each composition is expressed in terms of mass percentage on the basis of oxide or mass ppm, and is simply expressed as “%” or “ppm”, respectively.
  • SiO 2 is a main component of glass.
  • the content of SiO 2 is preferably 60% or more, more preferably 63% or more in the configuration example A in terms of oxide-based mass percentage.
  • it is preferably 45% or more, more preferably 50% or more
  • Structural Example C it is preferably 45% or more, more preferably 50% or more.
  • the content of SiO 2 is easy to dissolve and the foam quality is good, and the content of divalent iron (Fe 2+ ) in the glass is kept low, and the optical properties are good. Therefore, in the configuration example A, preferably 80% or less, more preferably 75% or less, in the configuration example B, preferably 80% or less, more preferably 70% or less, and in the configuration example C , Preferably 70% or less, more preferably 65% or less.
  • Al 2 O 3 is an essential component that improves the weather resistance of the glass in Structural Examples B and C.
  • the content of Al 2 O 3 is preferably 1% or more, more preferably 2% or more in the configuration example A.
  • Example B it is preferably more than 7%, more preferably 10% or more
  • Structural Example C it is preferably 10% or more, more preferably 13% or more.
  • the content of Al 2 O 3 is preferably Is 7% or less, more preferably 5% or less.
  • the configuration example B preferably 30% or less, more preferably 23% or less
  • the configuration example C preferably 30% or less, more preferably 20% or less.
  • B 2 O 3 is a component that promotes melting of the glass raw material and improves mechanical properties or weather resistance, but it does not cause inconvenience such as formation of striae due to volatilization or furnace wall erosion.
  • the content of B 2 O 3 is preferably 5% or less, more preferably 3% or less.
  • the content is preferably 15% or less, more preferably 12%. It is as follows.
  • Alkali metal oxides such as Li 2 O, Na 2 O, and K 2 O are useful components for promoting melting of the glass raw material and adjusting thermal expansion or viscosity.
  • the content of Na 2 O is preferably 3% or more, more preferably 8% or more.
  • the content of Na 2 O is preferably 7% or more, and more preferably 10% or more.
  • the content of Na 2 O is preferably 20% or less in the structural examples A and B in order to maintain the clarity during melting and maintain the foam quality of the produced glass, and 15% More preferably, the content is set to 3% or less in the configuration example C, and more preferably 1% or less.
  • the content of K 2 O is preferably 10% or less, more preferably 7% or less in the structural examples A and B, and preferably 2% or less, more preferably in the structural example C. 1% or less.
  • Li 2 O is an optional component, but in the structural examples A, B, and C in order to facilitate vitrification, to keep the iron content contained as impurities derived from the raw material low, and to keep the batch cost low. , Li 2 O can be contained at 2% or less.
  • the total content of these alkali metal oxides maintains the clarification at the time of melting, and maintains the foam quality of the produced glass.
  • it is 5% to 20%, more preferably 8% to 15%.
  • it is preferably 0% to 2%, more preferably 0% to 1%.
  • Alkaline earth metal oxides such as MgO, CaO, SrO, and BaO are useful components for accelerating melting of glass raw materials and adjusting thermal expansion or viscosity.
  • MgO has the effect of lowering the viscosity during glass melting and promoting melting. Moreover, since it has the effect
  • CaO is a component that promotes melting of the glass raw material and adjusts viscosity or thermal expansion, and therefore can be contained in the structural examples A, B, and C.
  • the content of CaO is preferably 3% or more, more preferably 5% or more.
  • it is preferably 20% or less, more preferably 10% or less, and in the configuration example B, preferably 6% or less, more preferably 4% or less.
  • SrO has the effect of increasing the thermal expansion coefficient and lowering the high temperature viscosity of the glass.
  • SrO can be contained in the structural examples A, B, and C.
  • the content of SrO is preferably 15% or less in the structural examples A and C, more preferably 10% or less, and in the structural example B It is preferably 5% or less, and more preferably 3% or less.
  • BaO like SrO, has the effect of increasing the coefficient of thermal expansion and lowering the high temperature viscosity of the glass. In order to obtain the above effect, BaO can be contained. However, in order to keep the thermal expansion coefficient of the glass low, it is preferably 15% or less in Configuration Examples A and C, more preferably 10% or less, and 5% or less in Configuration Example B. Of these, 3% or less is more preferable.
  • the total content of these alkaline earth metal oxides is preferably 10 in the configuration example A in order to keep the coefficient of thermal expansion low, to improve the devitrification characteristics, and to maintain the strength.
  • % To 30% more preferably 13% to 27%.
  • In the configuration example B preferably 1% to 15%, more preferably 3% to 10%, and in the configuration example C, preferably 5%.
  • % To 30% more preferably 10% to 20%.
  • ZrO 2 is used as an optional component in the structural examples A, B and C, preferably 10% or less, preferably You may make it contain 5% or less. It becomes difficult to devitrify glass by setting it as 10% or less.
  • the glass composition of the glass plate 10 of the present embodiment 5 to 100 ppm of Fe 2 O 3 may be contained in the structural examples A, B, and C in order to improve the meltability of the glass.
  • the preferable range of the amount of Fe 2 O 3 is as described above.
  • the glass of the glass plate 10 of the present embodiment may contain SO 3 as a fining agent.
  • the SO 3 content is preferably more than 0% and 0.5% or less in terms of mass percentage. 0.4% or less is more preferable, 0.3% or less is more preferable, and 0.25% or less is further preferable.
  • the glass of the glass plate 10 of this embodiment may contain one or more of Sb 2 O 3 , SnO 2 and As 2 O 3 as an oxidizing agent and a fining agent.
  • the content of Sb 2 O 3 , SnO 2 or As 2 O 3 is preferably 0 to 0.5% in terms of mass percentage. 0.2% or less is more preferable, 0.1% or less is more preferable, and it is further more preferable not to contain substantially.
  • Sb 2 O 3 , SnO 2 and As 2 O 3 act as an oxidizing agent for glass, they may be added within the above range for the purpose of adjusting the amount of Fe 2+ in the glass. However, from the environmental aspect, it is preferable that As 2 O 3 is not substantially contained.
  • the glass of the glass plate 10 of this embodiment may contain NiO.
  • NiO functions also as a coloring component
  • the content of NiO is preferably 10 ppm or less with respect to the total amount of the glass composition described above.
  • NiO is preferably 1.0 ppm or less, and more preferably 0.5 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass of the glass plate 10 of this embodiment may contain Cr 2 O 3 .
  • Cr 2 O 3 When Cr 2 O 3 is contained, Cr 2 O 3 also functions as a coloring component. Therefore, the content of Cr 2 O 3 is preferably 10 ppm or less with respect to the total amount of the glass composition described above.
  • Cr 2 O 3 is more preferably 1.0 ppm or less, and even more preferably 0.5 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • Glass of the glass plate 10 of the present embodiment may include TiO 2.
  • TiO 2 When TiO 2 is contained, TiO 2 also functions as a component that absorbs visible light. Therefore, the content of TiO 2 is preferably 1000 ppm or less with respect to the total amount of the glass composition described above. The content of TiO 2 is more preferably 500 ppm or less, and particularly preferably 100 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass of the glass plate 10 of this embodiment may include at least one component selected from the group consisting of CoO, V 2 O 5 and CuO.
  • these components When these components are contained, they also function as components that absorb visible light, and therefore the content of the components is preferably 10 ppm or less with respect to the total amount of the glass composition described above. In particular, it is preferable that these components are not substantially contained so as not to lower the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass plate 10 of the present invention has at least one or more bubbles in the inside thereof.
  • the luminance uniformity is high, and the edge light type planar light emitting device. It is suitable for use as a light guide plate.
  • the light guide plate 200 is the glass plate 10 of the present invention, and is opposed to the first main surface 11 of the glass plate 10 of the present invention, which serves as a light reflecting surface of the light guide plate 200.
  • the reflection member 300 is arranged.
  • Scattering members 400 are formed at predetermined intervals in a dot pattern on the first main surface 11 of the glass plate 10 of the present invention so as to be positioned between the glass plate 10 of the present invention and the reflecting member 300.
  • the scattering member may have another configuration as long as it can function as a light guide plate of the edge light type planar light emitting device.
  • the light from the light source is emitted from the second main surface 12 of the glass plate 10 of the present invention, which becomes the light emission surface of the light guide plate 200.
  • the glass plate 10 of the present invention has a ratio L max / L ave between the maximum luminance L max (cd / m 2 ) and the average luminance L ave (cd / m 2 ).
  • L max / L ave ⁇ 1.1 the luminance uniformity is high, and it is suitable for use as a light guide plate of an edge light type planar light emitting device.
  • a glass plate 10 of the present invention preferably has an average luminance L ave measured by the above procedure is 1000 cd / m 2 or more, more preferably 1200 cd / m 2 or more, is 1500 cd / m 2 or more More preferably.
  • the average luminance L ave is 1000 cd / m 2 or more, the visibility of the display image can be improved in a bright environment.
  • the luminance of the glass plate was measured according to the following procedure. (Brightness measurement) Diffusion ink was printed in a dot pattern on one main surface of a glass plate having at least one bubble inside, and a glass light guide plate having a scattering member formed on one main surface was produced. The dimension of this glass plate was 485 mm x 284 mm x t2 mm.
  • the absorption coefficient of light in the wavelength range of 400 to 700 nm was measured using an ultraviolet-visible near-infrared spectrophotometer (UH4150, manufactured by Hitachi High-Tech Science Co., Ltd.), the absorption coefficient of light having a wavelength of 550 nm was 0.04 m ⁇ 1. Met.
  • the maximum value ⁇ max of the light absorption coefficient in the wavelength range of 400 to 700 nm was 0.24 m ⁇ 1
  • the minimum value ⁇ min was 0.04 m ⁇ 1
  • ( ⁇ max / ⁇ min ) was 6. .
  • the glass plates of Examples 1 to 4 have the maximum luminance L max (cd / m 2 ) and the average luminance L ave (cd / m 2 ) in the luminance measurement performed in the above procedure,
  • the ratio L max / L ave satisfies 1 ⁇ L max / L ave ⁇ 1.1, so that the luminance uniformity is high and suitable for use as a light guide plate of an edge light type planar light emitting device. I found out.
  • the ratio L max / L ave between the maximum luminance L max (cd / m 2 ) and the average luminance L ave (cd / m 2 ) is 1.1 ⁇ L. Since max / L ave , the luminance uniformity was low.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Glass Compositions (AREA)

Abstract

L'invention fournit une feuille de verre telle que la perméabilité d'une région de lumière visible est élevée, et l'uniformité de luminance est élevée lors d'une mise en œuvre en tant que plaque de guidage de lumière d'un dispositif luminescent planaire à éclairage par la tranche. Plus précisément, l'invention concerne une feuille de verre qui possède une première ainsi qu'une seconde surface principale. Ladite feuille de verre est caractéristique en ce qu'elle présente un coefficient d'absorption d'une lumière de longueur d'onde de 550nm inférieur ou égal à 1m-1, et un rapport (αmax/αmin) entre une valeur maximale αmax (m-1) et une valeur minimale αmin (m-1) d'un coefficient d'absorption d'une lumière dans une plage de longueur d'onde de 400 à 700nm, inférieure ou égale à 10. Au moins une bulle est présente dans la partie interne de ladite feuille de verre. Enfin, un rapport Lmax/Lave entre la luminance maximale Lmax (cd/m2) et la luminance moyenne Lave (cd/m2) pour une lumière émise en sortie depuis ladite seconde surface principale, lorsqu'une lumière d'une région de longueur d'onde de lumière visible est émise en sortie depuis une source lumineuse vers une face extrémité de référence, satisfait 1≤Lmax/Lave≤1,1.
PCT/JP2015/073905 2014-08-28 2015-08-25 Feuille de verre WO2016031830A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11161769B2 (en) 2016-09-16 2021-11-02 Corning Incorporated High transmission glasses with alkaline earth oxides as a modifier

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WO2005122116A1 (fr) * 2004-06-11 2005-12-22 Nippon Electric Glass Co., Ltd. Méthode pour classer une glace pour écran plat, glace pour écran plat et méthode de fabrication
WO2006112415A1 (fr) * 2005-04-15 2006-10-26 Asahi Glass Company, Limited Procede de reduction du diametre de bulles presentes a l’interieur d’une plaque de verre
JP2009533808A (ja) * 2006-04-13 2009-09-17 サン−ゴバン グラス フランス 発光パネル
JP2011175102A (ja) * 2010-02-24 2011-09-08 Sony Corp 光学シート積層体、照明装置および表示装置
JP2012124000A (ja) * 2010-12-08 2012-06-28 Konica Minolta Advanced Layers Inc フィルム状面光源とこれを用いた液晶表示装置
JP2013073732A (ja) * 2011-09-27 2013-04-22 Fujifilm Corp 導光板

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005122116A1 (fr) * 2004-06-11 2005-12-22 Nippon Electric Glass Co., Ltd. Méthode pour classer une glace pour écran plat, glace pour écran plat et méthode de fabrication
WO2006112415A1 (fr) * 2005-04-15 2006-10-26 Asahi Glass Company, Limited Procede de reduction du diametre de bulles presentes a l’interieur d’une plaque de verre
JP2009533808A (ja) * 2006-04-13 2009-09-17 サン−ゴバン グラス フランス 発光パネル
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