About IGA KEN'ICHI
About HATAKOSHI GEN'ICHI
About O plus E
About light emitting diode
About technical history
About gallium nitride
About crystal growth
About crystal structure
About energy conversion efficiency
About band structure
About polarization(phenomenon)
About Auger effect
About optoelectronics
About production method
About Nobel Prize
About optoelectronics
About production method
About blue LED
About white LED
About luminous efficiency
About Light emitting devices
About 光エレクトロニクス
About 発光ダイオード
About 輝き