DAYLIGHTING DEVICE

• US 20170146208A1
• Filed: 05/12/2015
• Published: 05/25/2017
• Est. Priority Date: 05/12/2014
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: UEKI, Shun, KAMADA, Tsuyoshi, UEKI, Tomoko, NISHINAKA, Shumpei, KANNO, Toru, YUI, Hideomi, SHINOZAKI, Daisuke
• Granted Patent: US 9,976,718 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 17/00 Layered products essentially comprising sheet glass, or glass, slag, or like fibres
• CPC Class Codes: B32B 17/10431 Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
• CPC Class Codes: B32B 17/10568 varying in thickness
• CPC Class Codes: B32B 17/10743 containing acrylate (co)polymers or salts thereof
• CPC Class Codes: B32B 2250/04 4 layers
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 23/04 comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a glass layer B32B17/08
• CPC Class Codes: B32B 23/20 comprising esters
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/706 Anisotropic
• CPC Class Codes: B32B 2307/71 Resistive to light or to UV
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof walls, panels B32B2607/00
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/283 comprising polysiloxanes
• CPC Class Codes: B32B 27/286 : comprising polysulphones; polysulfides
• CPC Class Codes: B32B 27/30 : comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/308 : comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/325 : comprising polycycloolefins
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/365 : comprising polycarbonates
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B32B 3/04 : characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
• CPC Class Codes: B32B 3/26 : characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205; characterised by an apertured layer
• CPC Class Codes: B32B 3/30 : characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B32B 7/05 : the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14
• CPC Class Codes: B32B 7/14 : applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: E06B 2009/2417 : Light path control; means to control reflection
• CPC Class Codes: E06B 3/67 : characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
• CPC Class Codes: E06B 9/24 : Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blindsoperating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00
• CPC Class Codes: F21S 11/007 : characterised by the means for transmitting light into the interior of a building
• CPC Class Codes: G02B 3/06 : with cylindrical or toric faces
• CPC Class Codes: G02B 5/00 : Optical elements other than lenses light guides G02B6/00; optical logic elements G02F3/00
• CPC Class Codes: G02B 5/02 : Diffusing elements; Afocal elements
• CPC Class Codes: G02B 5/0215 : the surface having a regular structure
• CPC Class Codes: G02B 5/0242 : by means of dispersed particles
• CPC Class Codes: G02B 5/0257 : creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes
• CPC Class Codes: G02B 5/0278 : used in transmission
• CPC Class Codes: G02B 5/0284 : used in reflection

Abstract

A daylighting device (10) according to an aspect of the present invention includes a first substrate (1) which has optical transparency and to which external light is incident; a second substrate (2) which has optical transparency and is disposed facing the first substrate (1); a light diffusion layer (3) which is disposed between the first substrate (1) and the second substrate (2); and a daylighting layer (4) which is disposed between the first substrate (1) and the second substrate (2) and is formed by including a plurality of daylighting portions (42) having optical transparency and a void portion (43) which is provided between the plurality of daylighting portions (42) in one surface facing the light diffusion layer (3).

Claims

1. A daylighting device comprising:

a first substrate which has optical transparency and to which external light is incident;

a second substrate which has optical transparency and is disposed facing the first substrate;

a light diffusion layer which is disposed between the first substrate and the second substrate; and

a daylighting layer which is disposed between the first substrate and the second substrate and is formed by including a plurality of daylighting portions having optical transparency and a void portion which is provided between the plurality of daylighting portions in one surface facing the light diffusion layer.

2. The daylighting device according to claim 1,

wherein the light diffusion layer has anisotropy in light diffusion properties and shows the strong light diffusion properties in each of extending directions in the plurality of daylighting portions.

3. The daylighting device according to claim 1,

wherein the light diffusion layer shows weak light diffusion properties having 5 degrees or less of a full width at half maximum in a direction perpendicular to the extending direction of the plurality of daylighting portions.

4. The daylighting device according to claim 1,

wherein as properties of light diffusion in a direction perpendicular to a longitudinal direction of the plurality of daylighting portions, the light diffusion layer serves as a reflective surface in which a part of a side surface of the daylighting portion adjacent to the void portion reflects the light which is incident to the daylighting portion, the light passes through a point G in which one arbitrary light beam among the light beams which are incident to the daylighting portions is incident to the reflective surface, and in a case where among two spaces which use a virtual straight line which is perpendicular to a first surface of the first substrate as a boundary, a space at a side where the light beam to be incident to the point G is present is set as a first space and a space at a side where the light beam to be incident to the point G is not present is set as a second space, a diffusion intensity of the light travelling in a direction at a polar angle of 5 degrees with respect to the straight line that is a light travelling the side of the second space among the light beams emitted from the daylighting portions is 0.1% to 10% of the intensity of the light travelling along the straight line.

5. The daylighting device according to claim 1, further comprising:

a third substrate which is disposed between the first substrate and the second substrate.

6. The daylighting device according to claim 1,

wherein the light diffusion layer is disposed in a light incident side of the daylighting layer.

7. The daylighting device according to claim 6,

wherein the light diffusion layer is provided on a surface of the first substrate facing the second substrate, and

wherein the daylighting layer is provided on a surface of the second substrate facing the first substrate.

8. The daylighting device according to claim 7,

wherein the light diffusion layer is set as a first light diffusion layer and includes a second light diffusion layer showing weak light diffusion properties than that of the first light diffusion layer, and

wherein the second light diffusion layer is disposed between the second substrate and the daylighting layer.

9. The daylighting device according to claim 1,

wherein the light diffusion layer is disposed at a light emission side of the daylighting layer.

10. The daylighting device according to claim 9,

wherein the daylighting layer and the light diffusion layer are provided in the surface of the second substrate facing the first substrate.

11. The daylighting device according to claim 9,

wherein the daylighting layer is provided on a surface of the third substrate facing the first substrate, and

wherein the light diffusion layer is provided on the surface of the second substrate facing the third substrate.

12. The daylighting device according to claim 9,

wherein the light diffusion layer and the daylighting layer are laminated on a surface of the second substrate facing the third substrate.

13. The daylighting device according to claim 9,

wherein the daylighting layer is provided on the surface of the third substrate facing the first substrate, and

wherein the light diffusion layer is provided on the surface of the third substrate facing the second substrate.

14. The daylighting device according to claim 9,

wherein the daylighting device includes the daylighting layer on the surface of the third substrate facing the first substrate,

wherein the daylighting device includes the light diffusion layer on the surface of the third substrate facing the second substrate, and

wherein the third substrate is supported at a distance with respect to at least one of the first substrate and the second substrate through a supporting member which is provided at the light diffusion layer side.

15. The daylighting device according to claim 1,

wherein the light diffusion layer is configured of a light transmissive resin and a plurality of light diffusion particles which have different refractive indexes from the light transmissive resin, and

wherein the light diffusion particles form an anisotropic shape having a long axis and a short axis.

16. The daylighting device according claim 1,

wherein the light diffusion layer is formed of a plurality of convex portions extending in one direction.

17. The daylighting device according to claim 16,

wherein the plurality of convex portions are formed of lenticular lens structure.

18. The daylighting device according to claim 17, further comprising:

a planarizing layer planarizing a surface of the lenticular structure,

wherein the planarizing layer is formed of a material having the difference refractive index from the lenticular structure.

19. The daylighting device according to claim 1,

wherein an ultraviolet protecting layer is provided on the first substrate.

20. The daylighting device according to claim 1,

wherein the plurality of daylighting portions are formed of a polygonal-shaped structure, a cross-sectional shape perpendicular to a longitudinal direction has a plurality of apexes, has a polygonal shape in which all of inner angles are less than 180°

, and the polygonal shape includes a first surface facing the one surface of the second substrate and a plurality of apexes including first and second apexes that are apexes corresponding to the both ends of the third surface and a first apex which is not positioned on the first surface, and

wherein the daylighting layer is provided in a posture in which an air interface at the third apex side is provided toward the first substrate side.