High-luminance display apparatus

1. A color filter comprising a first filter exhibiting a first color and a second filter exhibiting a second color, the first filter comprising:

a first color forming material;

a first quantum dot;

a first metal nanoparticle having a first predetermined size, wherein a distance between the first metal nanoparticle and the first quantum dot is determined such that the first metal nanoparticle and the first quantum dot form a resonance structure, and

first graft molecules directly formed on a surface of the first metal nanoparticle, and

the second filter comprising:

a second color forming material;

a second quantum dot;

a second metal nanoparticle having a second predetermined size, wherein the second predetermined size is larger than the first predetermined size, and

second graft molecules directly formed on a surface of the second metal nanoparticle,

wherein each of the first graft molecules and each of the second graft molecules are made from an alkyl group, lengths of each of the first graft molecules and each of the second graft molecules are determined based on luminescence intensity of the first filter and/or the second filter, and each of the first graft molecules and each of the second graft molecules have a length of from 10 nm to 20 nm.

2. The color filter of claim 1 , wherein the first color has a wavelength shorter than that of the second color.

3. The color filter of claim 1 , wherein each of the first metal nanoparticle and the second metal nanoparticle has a shape with a non-angulated curved surface.

4. The color filter of claim 3 , wherein each of the first metal nanoparticle and the second metal nanoparticle has a spherical shape.

5. The color filter of claim 1 , wherein

a plurality of first metal nanoparticles and a plurality of second metal nanoparticles are included in the first filter and the second filter, respectively, and

the first metal nanoparticles and the second metal nanoparticles are spaced apart from each other.

6. The color filter of claim 1 , wherein

the first metal nanoparticle and the first quantum dot are spaced apart from each other, and

the second metal nanoparticle and the second quantum dot are spaced apart from each other.

7. The color filter of claim 6 , wherein

a distance between the second metal nanoparticle and the second quantum dot is determined such that the second metal nanoparticle and the second quantum dot form a resonance structure.

8. The color filter of claim 1 , wherein the first metal nanoparticle and the second metal nanoparticle comprise Au, Ag, Al, Al2O3, Co, Cu, Cr, Pt, Ni, Fe, Mo, or W.

9. The color filter of claim 1 , further comprising a third filter exhibiting a third color, the third filter comprising a third color forming material, a third quantum dot having a different size from the first and second quantum dots, and a third metal nanoparticle having a third predetermined size which is different from the first predetermined size and the second predetermined size.

10. The color filter of claim 9 , wherein the third predetermined size is longer than those of the first predetermined size and the second predetermined size, and

wherein the first color has a wavelength shorter than that of the second color and the second color has a wavelength shorter than that of the third color.

11. The color filter of claim 9 , wherein the first quantum dot has a size smaller than that of the second quantum dot and the second quantum dot has a size smaller than that of the third quantum dot.

12. A display apparatus comprising:

a display unit comprising a plurality of pixel regions controlled according to an image signal; and

a color filter comprising a plurality of filter regions respectively corresponding to the plurality of pixel regions,

wherein the color filter comprises:

a first filter comprising a first color forming material, a first quantum dot, and a first metal nanoparticle, the first filter exhibiting a first color; and

a second filter comprising a second color forming material, a second quantum dot having a different size from the first quantum dot, and a second metal nanoparticle having a different size from the first metal nanoparticle, the second filter exhibiting a second color, wherein a distance between the first metal nanoparticle and the first quantum dot is determined such that the first metal nanoparticle and the first quantum dot form a resonance structure; and

graft molecules directly formed on each surface of the first metal nanoparticle and the second metal nanoparticle,

wherein each of the graft molecules is made from an alkyl group, a length of each of the graft molecules is determined based on luminescence intensity of the first filter and/or second filter, and each of the graft molecules have a length of from 10 nm to 20 nm.

13. The display apparatus of claim 12 , wherein

the display unit is a transmissive type liquid crystal panel, and

the display apparatus further comprises a backlight unit that provides blue light.

14. The display apparatus of claim 12 , wherein the color filter further comprises a third filter comprising a third color forming material, a third quantum dot having a different size from the first and second quantum dots, and a third metal nanoparticle having a different size from the first and second metal nanoparticles, the third filter exhibiting a third color.

15. The display apparatus of claim 14 , wherein each of the first metal nanoparticle, the second metal nanoparticle, and the third metal nanoparticle has a shape with a non-angulated curved surface.

16. The display apparatus of claim 15 , wherein a metal nanoparticle included in a filter that exhibits a color of a longer wavelength, from among the first metal nanoparticle, the second metal nanoparticle, and the third metal nanoparticle, has a larger size than the other metal nanoparticles.

17. The display apparatus of claim 14 , wherein

the display unit is a transmissive type liquid crystal panel, and

the display apparatus further comprises a backlight unit that provides ultraviolet (UV) light.