The blue electroluminescence of C-ZnSe:Ga at room temperature is first reported

presented the measurement on the relative properties

and discussed the its luminous mechanism. A strong peak of the electroluminous spectra is at 4800A and a weak peak at 6300A. The self-activated emission at 6300A is reduced with increase of voltage

but the edge emission at 4800A increased. Therefore

the colours vary from red via yellow and green to blue.The bright blue light is observed in the bright room. Finally

the tentative idea of ZnSe varicoloured display is presented.