PURPOSE: A ruthenium-aluminum perovskite-based phosphor for blue light excitation is provided to emit green and yellow light with excellent luminance efficiency. CONSTITUTION: A ruthenium-aluminum perovskite-based phosphor is represented by chemical formula 1: (Lu_(1-a-b)A_aB_b)D_dO_3 where A is one or two more elements selected from Sc, Y, La, and Gd

The present invention relates to a high thermal conductivity composite material which is a metal-based thermal interface material having a high thermal conductivity and is suitable for element bonding between thermal conductive routes in an electronic heat dissipation device. The high thermal conductivity composite material contains an active soldering alloy and an inorganic high thermal conductive substrate. The active soldering alloy contains at least an alloy substrate and an active element. ...

PROBLEM TO BE SOLVED: To provide a resin molding material for an optical semiconductor light-emitting device having high heat conductivity and high optical reflectance of wavelength in a near ultraviolet region, and provide a resin molding for the optical semiconductor light-emitting device having high moldability in the molding.

PROBLEM TO BE SOLVED: To provide a simple and prompt method for producing a phosphor for improving conventional complicated processes such as a firing process requiring high temperature and long time or a hydrothermal process for producing a phosphor via water at high temperature, and to provide a method for producing an electroluminescent (EL) element with high luminance and low voltage driving, which solves problems of a high price and high voltage driving of a conventional inorganic EL elemen...

PROBLEM TO BE SOLVED: To provide a color filter having a blue color pixel part, with which higher brightness is obtained and brighter liquid crystal display becomes possible when an LED or an organic EL is used as a backlight source, and to provide a liquid crystal display device.