Patent ID: 11892144
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC A  F  H | IPC A  F  H

Claim 0:
1. An LED lighting sheet for animal/plant growth, comprising:
an array of LED chips;
a substrate;
a metal wiring portion formed on a surface of the substrate;
a light reflection insulating protective film formed in a region, other than a region in which the LED chips are provided or their peripheral regions, and placed on the metal wiring portion; and
a transparent protective film formed so as to cover the light reflection insulating protective film and the LED chips,
wherein:
the plurality of LED chips is implemented on the metal wiring portion,
a thickness of the metal wiring portion is greater than or equal to 10 μm and less than or equal to 50 μm,
at any location 50 mm away from the LED chips in a lower region below the LED lighting sheet for animal/plant growth, a photosynthetic photon flux density converted by input power and normalized by an average value over the lower region is greater than or equal to 0.2, and
a variation in photosynthetic photon flux densities respectively measured at locations 50 mm away from the LED chips in the lower region below the LED lighting sheet for animal/plant growth is less than or equal to 0.5 in standard deviation when normalized by the average value.