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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/155754
Kind Code:
The present invention provides a retroreflective window capable of blocking direct sunlight and reflecting back the sunlight to maintain a view through the window and improve accessto the direct sunlight. A retroreflective window (1 – 3) comprises: a first and a second transparent plate material (10a, 10b); a transparent first prism (30) arranged between the first and the second transparent plate material; and a switching member (50) provided opposite a second side (30b) of the first prism and capable of switching between a reflective state where the reflectance of visible light and infrared light is greater than or equal to 70% and a non-reflective state where the reflectance of visible light and infrared light is less than or equal to 30%. When the switching member is in a reflective state, the first prism (30) emits the light entering at a given angle or greater at substantially the same angle as the incidence angle from the first transparent plate material (10a) after the light is reflected by the switching member and a third side (30c), and transmits the light entering at an angle less than the given angle and reaching the third side, thereby emitting the same from the second transparent plate material (10b).

NAKAMURA Takuju (W Bldg. 6F 1-8-15, Kounan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
Publication Date:
August 15, 2019
Filing Date:
December 10, 2018
Export Citation:
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YAZAKI ENERGY SYSTEM CORPORATION (4-28, Mita 1-chome Minato-k, Tokyo 33, 〒1088333, JP)
International Classes:
G02B5/124; E06B3/40; E06B5/00; E06B9/24
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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