Liquid crystal picture screen with improved backlighting

A backlight system comprising at least one gas discharge lamp with a discharge vessel (5) and at least one electrode comprising capacitive coupling means (6) with a dielectric material with the composition

• [A′a1n1+A″a2n2+ . . . An′annn+] [B′b1m1+B″b2m2 + . . . Bm′bmmn↓]O3, wherein the cations A′a1n1+A″a2n2+ . . . An′annn+ comprise at least one or several of the cations chosen from the group of Ba2+, Pb2+, Sr2+ and Ca2+, as well as possibly one or several of the cations chosen from the group of Cs1+, Rb1+, Tl1+, K1+, Pb2+, Ag1+, Sr2+, Na1+, Bi3+, La3+, Mg2+, Zn2+, Ca2+, Ce3+, Cd2+, Pr3+, Nd3+, Eu3+, Gd3+ and Sm3+, and
• the cations B′b1m1+B″b2m2+ . . . Bm′bmmn+ comprise at least one or several of the cations chosen from the group of Ti4+, Zr4+ and Sn4+ as well as possibly one or several of the cations chosen from the group of Mn2+, Cr2+, In3+, V2+, Fe2+, Pb4+, Li1+, Co2+, Sc3+, Zn2+, Cu2+, U6+, Mg2+, Hf4+, Mo3+, Ni2+, Nb4+, Ti3+, W4+, Mo4+, Fe3+, Mn3+, V3+, Re4+, Ir4+, Ru4+, W5+, Ta5+, Cr3+, Ga3+, Co3+, Mo5+, Ni3+, Sb5+, W6+, Nb5+, Mo6+, Fe4+, Re5+, V4+, Te6+, V5+, Cu3+, Al3+, Mn4+, Ge4+, Y3+, Gd3+, Dy3+, Ho3+, Er3+, Yb3+, Tb3+ and Lu3+ with
• 0.98≦a1+a2+ . . . +an≧1.02,
• 0.98≦b1+b2+ . . . +bm≧1.02,
• a1+a2+ . . . +an+b1+b2+ . . . +bm≦2,
• a1*n1+a2*n2+ . . . +an*nn+b1*m1+ . . . b2*m2+ . . . +bm*mm≦6.

A gas discharge lamp with a discharge vessel and at least one electrode comprising capacitive coupling means (6) with a dielectric material with the composition

• [A′a1n1+A″a2n2+ . . . An′annn+] [B′b1m1+B″b2m2 + . . . Bm′bmmn↓]O3, wherein the cations from the group of Ba2+, Pb2+, Sr2+ and Ca2+, as well as possibly one or several of the cations chosen from the group of Cs1+, Rb1+, Tl1+, K1+, Pb2+, Ag1+, Sr2+, Na1+, Bi3+, La3+, Mg2+, Zn2+, Ca2+, Ce3+, Cd2+, Pr3+, Nd3+, Eu3+, Gd3+ and Sm3, and
• the cations B′b1m1+B″b2m2+ . . . Bm′bmmn+ comprise at least one or several of the cations chosen from the group of Ti4+, Zr4+ and Sn4+ as well as possibly one or several of the cations chosen from the group of Mn2+, Cr2+, In3+, V2+, Fe2+, Pb4+, Li1+, Co2+, Sc3+, Zn2+, Cu2+, U6+, Mg2+, Hf4+, Mo3+, Ni2+, Nb4+, Ti3+, W4+, Mo4+, Fe3+, Mn3+, V3+, Re4+, Ir4+, Ru4+, W5+, Ta5+, Cr3+, Ga3+, Co3+, Mo5+, Ni3+, Sb5+, W6+, Nb5+, Mo6+, Fe4+, Re5+, V4+, Te6+, V5+, Cu3+, Al3+, Mn4+, Ge4+, Y3+, Gd3+, Dy3+, Ho3+, Er3+, Yb3+, Tb3+ and Lu3+ with
• 0.98≦a1+a2+ . . . +an≧1.02,
• 0.98≦b1+b2+ . . . +bm≧1.02,
• a1+a2+ . . . +an+b1+b2+ . . . +bm≦2,
• a1*n1+a2*n2+ . . . +an*nn+b1*m1+b2*m2+ . . . +bm*mm≦6.

A liquid crystal picture screen provided with a backlight system which comprises at least one gas discharge lamp with a discharge vessel (5) and at least one capacitive coupling means (6) with a dielectric material with the composition

• [A′a1n1+A″a2n2+ . . . An′annn+] [B′b1m1+B″b2m2+ . . . Bm′bmmn↓]O3, wherein the cations A′a1n1+A″a2n2+ . . . An′annn+ comprise Ba2+, and
• the cations B′b1m1+B″b2m2+ . . . Bm′bmmn+ comprise Nb5+, Co2+ and Mn3+ with
• 0.98≦a1+a2+ . . . +an≧1.02,
• 0.98≦b1+b2+ . . . +bm≧1.02,
• a1+a2+ . . . +a0+b1+b2+ . . . +bm≦2,
• a1*n1+a2*n2+ . . . +an*nn+b1*m1+ . . . b2* m2+ . . . +bm*mm≦6.

A liquid crystal picture screen provided with a backlight system which comprises at least one gas discharge lamp with a discharge vessel (5) and at least one capacitive coupling means (6) with a dielectric material with the composition

• [A′a1n1+A″a2n2+ . . . An′annn+] [B′b1m1+B″a2m2+ . . . Bm′bmmn↓]O3, wherein the cations A′a1n1+A″a2n2+ . . . An′annn+ comprise Ba2+ and Mg2+, and
• the cations B′b1m1+B″b2m2+ . . . Bm′bmmn+ comprise Y3+, W6+, Mo6+ and Mn2+, and
• an additional compound, which is SiO2 with
• 0.98≦a1+a2+ . . . +an≧1.02,
• 0.98≦b1+b2+ . . . +bm≧1.02,
• a1+a2+ . . . +an+b1+b2+ . . . +bm≦2,
• a1*n1+a2*n2+ . . . +an*nn+b1*m1+ . . . . b2*2++ . . . +bm*mm≦6.