Photoluminescent (PL) spectra of SnO2, In2O3, Y2O3, Yb2O3, CaO oxides and their mixtures, doped with rare-earth ions have been studied. The possibility of their use for electroluminescent (EL) displays was considered. It is shown, that under Ar laser excitation of the luminescence one can get display color range from green to red. PL spectra of oxides with Eu3+ are characterized by the substantially greater set of emission lines than for the oxides with Ce3+. It indicates that the degeneracy of 7F1,2 levels in Eu3+ luminescence centers is removed. Raman spectra studies have been allowed to identify the impurity ion Eu3+ symmetry in oxide matrices. It corresponds to the C3v group. The ion Ce3+ symmetry under substitution In3+, Sn2+, Y3+ for Ce3+ in the oxide lattice is substantially higher than C3v, therefore, the PL spectrum contains only two lines in the visible range, and their energy position slightly depends on the oxide matrix type.