Daylighting device

• US 9,976,718 B2
• Filed: 05/12/2015
• Issued: 05/22/2018
• Est. Priority Date: 05/12/2014
• Status: Expired due to Fees

• 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
• Primary Examiner(s): MAHONEY, CHRISTOPHER E
• Application Number:
  US15/310,261
• Publication Number:
  US 20170146208A1
• Time in Patent Office: 1,106 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 first light diffusion layer which has optical transparency and 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 a first surface facing the first light diffusion layer,

wherein the first light diffusion layer

strongly distributes, in a first direction along which each of the plurality of daylighting portions extend, the external light incident from the first substrate, and

emits, toward the second substrate, the external light diffused.

2. The daylighting device according to claim 1,

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

3. The daylighting device according to claim 1,

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

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

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

5. The daylighting device according to claim 4,

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

6. The daylighting device according to claim 5,

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

7. The daylighting device according to claim 5,

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

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

8. The daylighting device according to claim 5,

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

9. The daylighting device according to claim 5,

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

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

10. The daylighting device according to claim 5,

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

wherein the first light diffusion layer is on a third 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 a first side of the first light diffusion layer.

11. The daylighting device according to claim 1,

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

12. The daylighting device according to claim 11,

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

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

13. The daylighting device according to claim 12, the daylighting device further comprising:

a second light diffusion layer showing weak light diffusion properties than that of the first light diffusion layer,

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

14. The daylighting device according to claim 1,

wherein the first 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 each of the plurality of light diffusion particles forms an anisotropic shape having a long axis and a short axis.

15. The daylighting device according to claim 1,

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

16. The daylighting device according to claim 15,

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

17. The daylighting device according to claim 16, the daylighting device further comprising:

a planarizing layer planarizing a second surface of the lenticular lens structure,

wherein the planarizing layer is formed of a material having a first refractive index different from a second refractive index of the lenticular lens structure.

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

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

19. 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 second surface facing a third surface of the second substrate,

first and second apexes corresponding to both ends of the second surface and

a third apex which is not positioned on the second 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.