Red-enhanced white LCD displays comprising sol-gel-based color conversion films

A color conversion film for a LCD (liquid crystal display) having RGB (red, green, blue) color filters, the color conversion film comprising at least one rhodamine-based fluorescent (RBF) compound selected to absorb illumination from a backlight source of the LCD and have a red emission peak, wherein the backlight source of the LCD provides white illumination and the at least one RBF compound is red-fluorescent and defined by Formula 1:

• wherein
• R1 is COOR, NO2, COR, COSR, CON(R)2 or CN;
• R2 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R3 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R4-R16 and R4′-R16′ are each independently selected from H, CF3, alkyl, haloalkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, halide, NO2, OR, N(R)2, COR, CN, CON(R)2, CO(N-Heterocycle) and COOR;
• R is H, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2),qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2)pSi(Oalky)3;
• n and m are each independently an integer between 1-4;
• p and q are each independently an integer between 1-6;
• r is an integer between 0-10;
• M is a monovalent cation;
• X is an anion;
• and
• wherein if R2 and R3 are hydrogens (H), then R1 is NO2, COR, COSR, CON(R)2or CN.

A color conversion film for a LCD (liquid crystal display) having RGB (red, green, blue) color filters, the color conversion film comprising at least one rhodamine-based fluorescent (RBF) compound selected to absorb illumination from a backlight source of the LCD and have a red emission peak, wherein the backlight source of the LCD provides white illumination and the at least one RBF compound is red-fluorescent and defined by Formula 1:

• wherein
• R1 is COOZ, NO2, COR, COSR, or CN;
• R2 each is independently selected from H, halide, COR, CN, NCO, NCS and COOZ;
• R3 each is independently selected from H, halide, COR, CN, NCO, NCS, OR, SR, SO3H, SO3M and COOZ;
• R4-R16 and R4′-R16′ are each independently selected from H, alkyl, cycloalkyl, heterocycloalkyl, aryl, benzyl, halide, NO2, OR, N(R)2, COR, CON(R)2, CO(N-heterocycle) and COOR;
• R is H, alkyl, cycloalkyl, heterocycloalkyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2)qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2)pSi(Oalkyl)3;
• Z is unsubstituted alkyl, cycloalkyl, heterocycloalkyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2),qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2)pS i(Oalkyl)3;
• M is a monovalent cation;
• n and m are each independently an integer between 1 -4;
• p and q are each independently an integer between 1 -6;
• r is an integer between 0-10;
• X is an anion;
• and
• wherein if R2 and R3 are hydrogens (H), then R1 is NO2, COR, COSR, or CN.

An LCD (liquid crystal display) comprising:

• A color conversion film;
• RGB (red, green, blue) color filters;
• and
• a backlight source providing white illumination;
• wherein the color conversion film comprises at least one rhodamine-based fluorescent (RBF) compound selected to absorb illumination from the backlight source of the LCD and have a red emission peak;
• and wherein the at least one RBF compound is red-fluorescent and defined by Formula 1:
• wherein
• R1 is COOR, NO2, COR, COSR, CON(R)2or CN;
• R2 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R3 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R4-R16 and R4′-R16′ are each independently selected from H, CF3, alkyl, haloalkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, halide, NO2, OR, N(R)2, COR, CN, CON(R)2, CO(N-Heterocycle) and COOR;
• R is H, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2),qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2) pSi(Oalky)3;
• n and m are each independently an integer between 1-4;
• p and q are each independently an integer between 1-6;
• r is an integer between 0-10;
• M is a monovalent cation;
• X is an anion;
• and
• wherein if R2 and R3 are hydrogens (H), then R1 is NO2, COR, COSR, CON(R)2 or CN.

An LCD (liquid crystal display) comprising:

• a color conversion film;
• RGB (red, green, blue) color filters;
• and
• a backlight source providing white illumination;
• wherein the color conversion film comprises at least one rhodamine-based fluorescent (RBF) compound selected to absorb illumination from the backlight source of the LCD and have a red emission peak and wherein the at least one RBF compound is red-fluorescent and defined by Formula 1:
• wherein
• R1 is COOZ, NO2, COR, COSR or CN;
• R2 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R3 each is independently selected from H, halide, N(R)2, COR, CN, CON(R)2, CO(N-heterocycle), NCO, NCS, OR, SR, SO3H, SO3M and COOR;
• R4-R16 and R4′-R16′ are each independently selected from H, CF3, alkyl, haloalkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, halide, NO2, OR, N(R)2, COR, CN, CON(R)2, CO(N-Heterocycle) and COOR;
• R is H, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2),qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2)pSi(Oalkyl)3;
• Z is unsubstituted alkyl, cycloalkyl, heterocycloalkyl, aryl, benzyl, —(CH2CH2O)rCH2CH2OH, —(CH2)pOC(O)NH(CH2)qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2 or —(CH2)pSi(Oalkyl)3;
• n and m are each independently an integer between 1-4;
• p and q are each independently an integer between 1-6;
• r is an integer between 0-10;
• M is a monovalent cation;
• X is an anion;
• and
• wherein if R2 and R3 are hydrogens (H), then R1 is NO2, COR, COSR or CN.