MUMBAI, India, June 26 -- Intellectual Property India has published a patent application (202617007807 A) filed by Nitto Denko Corporation on January 27, 2026, for Ventilation Film, Ventilation Member, And Light Emitting Device.
Inventors include Hayashi Kahoko; Uemura Kou; and Matsuda Takayuki.
The application for the patent was published on June 19, 2026, under issue no. 25/2026.
Abstract: Provided is a ventilation film which has air permeability in the thickness direction, is colored, and has a first main surface and a second main surface that is positioned on the opposite side of the first main surface. The second main surface has a greater lightness than the first main surface. The absolute value of the lightness difference between the first main surface and the second main surface is 1.5 to 76 inclusive. The lightness of the second main surface is 20 to 95 inclusive. The luminous transmittance of the light transmitted from the first main surface to the second main surface is 0.015 or less. The lightness mentioned above is the lightness L* of the CIE 1976 L*a*b* color space as specified in JIS Z 8781-4 (2013). The luminous transmittance is expressed by the value of a stimulus value Y of CIE tristimulus values as specified in JIS Z 8781-3 (2016). This ventilation film is suitable for use in light emitting devices such as lamps.
Disclaimer: Curated by HT Syndication.
