Display device including transmittance control display
View Patent ↗Provided is a display device including a first display, the first display includes a first substrate, a first electrode on the first substrate, a second electrode on the first electrode, a second substrate on the second electrode, and a liquid crystal layer disposed between the first electrode and the second electrode, the liquid crystal layer includes a liquid crystal and a black dye, and the black dye includes at least one of a first black dye, a second black dye, and a third black dye. The first black dye is a compound in which three naphthalene rings are connected via two azo groups, the second black dye is a compound in which two naphthalene rings and one aromatic group are connected via two azo groups, and the third black dye is a compound in which three naphthalene rings and one aromatic group are connected via three azo groups.
1. A display device comprising a first display, wherein the first display includes:
a first substrate;
a first electrode on the first substrate;
a second electrode on the first electrode;
a second substrate on the second electrode; and
a liquid crystal layer disposed between the first electrode and the second electrode,
the liquid crystal layer includes a liquid crystal and a black dye,
the black dye includes at least one a first black dye, a second black dye, or a third black dye,
the first black dye is a compound in which three naphthalene rings are connected via two azo groups,
the second black dye is a compound in which two naphthalene rings and one aromatic group are connected via two azo groups, and
the third black dye is a compound in which three naphthalene rings and one aromatic group are connected via three azo groups,
wherein the second black dye is represented by Formula 5 or 6:
where, in Formulas 5 and 6, R 9 , and R 10 are each independently —H, —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , C 5 H 11 , a linear alkyl group having 6 to 8 carbon atoms, or a branched alkyl group having 3 to 8 carbon atoms.
2. A display device comprising a first display, wherein the first display includes:
a first substrate;
a first electrode on the first substrate;
a second electrode on the first electrode;
a second substrate on the second electrode; and
a liquid crystal layer disposed between the first electrode and the second electrode,
the liquid crystal layer includes a liquid crystal and a black dye,
the black dye includes at least one a first black dye, a second black dye, or a third black dye,
the first black dye is a compound in which three naphthalene rings are connected via two azo groups,
the second black dye is a compound in which two naphthalene rings and one aromatic group are connected via two azo groups, and
the third black dye is a compound in which three naphthalene rings and one aromatic group are connected via three azo groups,
wherein the first black dye is represented Formula 1, 2, or 3:
where, in Formula 1, 2, and 3, R 1 , R 2 , R 3 , R 4 , and R 5 are each independently —H, —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , C 5 H 11 , a linear alkyl group having 6 to 8 carbon atoms, or a branched alkyl group having 3 to 8 carbon atoms.
3. A display device comprising a first display, wherein the first display includes:
a first substrate;
a first electrode on the first substrate;
a second electrode on the first electrode;
a second substrate on the second electrode; and
a liquid crystal layer disposed between the first electrode and the second electrode,
the liquid crystal layer includes a liquid crystal and a black dye,
the black dye includes at least one a first black dye, a second black dye, or a third black dye,
the first black dye is a compound in which three naphthalene rings are connected via two azo groups,
the second black dye is a compound in which two naphthalene rings and one aromatic group are connected via two azo groups, and
the third black dye is a compound in which three naphthalene rings and one aromatic group are connected via three azo groups,
wherein the third black dye is represented by Formula 7 or 8:
where, in Formulas 7 and 8, R 11 and R 12 are each independently —H, —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , C 5 H 11 , a linear alkyl group having 6 to 8 carbon atoms, or a branched alkyl group having 3 to 8 carbon atoms.
4. The display device of claim 1 , further comprising:
a second display on the first display,
wherein the second display is a transparent display.
5. The display device of claim 1 ,
wherein the liquid crystal layer further comprises a reactive initiator, an acrylic monomer, and a urethane-acrylic oligomer.
6. The display device of claim 1 ,
wherein an amount of the black dye is 0.01 wt % to 10 wt % with respect to the liquid crystal.
7. The display device of claim 1 , further comprising:
a first insulating layer between the first electrode and the liquid crystal layer; and
a second insulating layer between the second electrode and the liquid crystal layer.
8. The display device of claim 3 , further comprising:
a second display on the first display,
wherein the second display is a transparent display.
9. The display device of claim 3 ,
wherein the liquid crystal layer further comprises a reactive initiator, an acrylic monomer, and a urethane-acrylic oligomer.
10. The display device of claim 3 ,
wherein an amount of the black dye is 0.01 wt % to 10 wt % with respect to the liquid crystal.
11. The display device of claim 3 , further comprising:
a first insulating layer between the first electrode and the liquid crystal layer; and
a second insulating layer between the second electrode and the liquid crystal layer.
12. The display device of claim 2 , further comprising:
a second display on the first display,
wherein the second display is a transparent display.
13. The display device of claim 2 ,
wherein the liquid crystal layer further comprises a reactive initiator, an acrylic monomer, and a urethane-acrylic oligomer.
14. The display device of claim 2 ,
wherein an amount of the black dye is 0.01 wt % to 10 wt % with respect to the liquid crystal.
15. The display device of claim 2 , further comprising:
a first insulating layer between the first electrode and the liquid crystal layer; and
a second insulating layer between the second electrode and the liquid crystal layer.