The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2011
Filed:
Sep. 30, 2008
Soshchin Naum, Changhua, TW;
Wei-hung Lo, Taipei, TW;
Chi-ruei Tsai, Taipei, TW;
Other;
Abstract
A blue-green-red three-band phosphor for multilayer agricultural plastic film for converting near ultraviolet light in photosynthetic active radiation is disclosed. The substrate of the phosphor is prepared from the group IIA element SiO, having a total stoichiometric equation (ΣMeO)(SiO), in which α=1, 2, 3, ΣMe=Baand/or Srand/or Caand/or Mg, having an orthorhombic crystal architecture, and generating a three-band spectrum when activated by d-f element selected from the group of Eu, Mnand Sm. The maximum wavelength of the three-band spectrum is λ=440˜460 nm, λ=515˜535 nm and λ=626˜640 nm. The maximum value and halfwave width of every spectrum are determined subject to the concentration of the activator and the phosphor synthesis technology. The three-band phosphor is prepared through a solid synthesis method in the form of high dispersed ultrafine powder having the average grain size of d≦0.8 μm. The use of an agricultural plastic film made according to the present invention in an enclosed soil equipment greatly raises the productivity of vegetable crop.