Daylighting system

Patent metadata

Field	Value
Publication number	US-10006598-B2
Application number	US-201715639208-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Jun 14, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A daylighting system includes a sheet-like light control member disposed on at least an upper part of a daylighting opening, and a shade disposed oppositely to at least a part of the opening, the part being below the part where the light control member is disposed. The light control member is configured to change upward a traveling direction of incident light and allow the incident light to pass through the light control member.

First claim

The invention claimed is:

1. A daylighting system comprising:
a sheet-like light control member disposed on at least an upper part of a daylighting opening, the light control member being configured to change upward a traveling direction of incident light and allow the incident light to pass therethrough;
a shade disposed oppositely with respect to at least a part of the daylighting opening that is below the upper part of the daylighting opening where the light control member is disposed; and
a window member installed on the daylighting opening, the window member supporting the light control member,
wherein the light control member includes transparent first portions that extend in a first direction that is nonparallel with respect to an up-and-down direction and that are arranged in a second direction that is nonparallel with respect to the first direction, and second portions that are arranged along the second direction alternately with the first portions, the second portions having a refractive index that is different from that of the first portions, and
wherein in a plane along a normal direction to the light control member and the second direction, an angular range including an outgoing direction of light going out from the light control member, the light having been totally reflected on an interface between the first portions and the second portions and passed through the light control member, is smaller than an angular range including an incident direction of the light incident on the light control member.

2. The daylighting system according to claim 1 , wherein
the shade is configured to be oppositely disposed with respect to the light control member.

3. The daylighting system according to claim 1 , wherein
in a plane along a normal direction to the light control member and the second direction, an angular range including an outgoing direction of light going out from the light control member, the light having been reflected on an interface between the first portion and the second portion and passed through the light control member, is smaller than an angular range including an incident direction of the light incident on the light control member.

4. The daylighting system according to claim 1 , wherein
in a plane along a normal direction to the light control member and the second direction, an angle defined by an interface between each second portion and the first portion adjacent to the second portion from above, relative to the normal direction to the light control member, decreases from an incident side toward an outgoing side.

5. An object comprising the daylighting system according to claim 1 .

6. The daylighting system according to claim 1 , wherein
the window member includes window members, and
the light control member is located between the window members.

7. The daylighting system according to claim 1 , wherein
each of the second portions includes a first side surface facing one side in the second direction and a second side surface facing the other side in the second direction,
the first side surface is formed as a polygonal surface, and includes a steeply inclined surface and a mildly inclined surface, and
an angle defined by the steeply inclined surface relative to the normal direction to the light control member is larger than an angle defined by the mildly inclined surface relative to the normal direction to the light control member.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Sekido Masayuki
• Mitsuzuka Satoshi
• Takanokura Tomoe
• Obata Chiaki
• AMEMIYA Saya
• Suzuki Michiya

Classifications

• F21V9/04

  for filtering out infrared radiation (dichroic reflectors F21V7/22; using liquid-filled chambers F21V9/12) · CPC title

• E06B2009/2417

  Light path control; means to control reflection · CPC title

• E06B9/01

  Grilles fixed to walls, doors, or windows; Grilles moving with doors or windows; Walls formed as grilles, e.g. claustra {(emergency release of window grilles E05B65/1033; security bars for wings E05C19/003)} · CPC title

• E06B9/28 Primary

  with horizontal lamellae, e.g. non-liftable (louvre windows or gratings E06B7/08) · CPC title

• F21S11/007 Primary

  characterised by the means for transmitting light into the interior of a building · CPC title