Display device and method of manufacturing the same

1. A display device comprising:

a display panel comprising:

a first substrate including a pixel electrode formed on a pixel region and electrically connected to a switching device, and a first alignment layer formed on the pixel electrode;

a second substrate including a common electrode layer facing the first substrate, and a second alignment layer formed on the common electrode layer; and

a liquid crystal layer including a liquid crystal composition having a nematic-to-isotropic transition temperature higher than about 80° C. interposed between the first substrate and the second substrate;

a backlight assembly configured to provide light to the display panel;

a receiving container receiving the backlight assembly; and

a heat sink member disposed between the backlight assembly and the receiving container;

wherein the liquid crystal composition has a refractive index anisotropy (Δn) of about 0.1 to about 0.12.

2. The display device of claim 1 , wherein the liquid crystal composition includes a first liquid crystal compound and a second liquid crystal compound, the first liquid crystal compound includes at least one selected from the group consisting of compounds represented by the following Chemical Formulas 1 and 2, and the second liquid crystal compound includes a compound represented by the following Chemical Formula 3, wherein X 1 , X 2 , X 3 and X 4 independently represent an alkyl group having 1 to 4 carbon atoms, a fluorine atom or a chlorine atom where Z 1 , Z 2 and Z 3 independently represent

and Y represents a fluorine atom or a hydrogen atom.

3. The display device of claim 2 , wherein a content of each of the first and second liquid crystal compounds is about 4% to about 8% by weight based on a total weight of the liquid crystal composition.

4. The display device of claim 1 , wherein the liquid crystal composition has a dielectric anisotropy (Δ∈) of about 7 to about 10.

5. The display device of claim 1 , wherein the liquid crystal composition has a rotational viscosity of about 60 mPa·s to about 70 mPa·s.

6. The display device of claim 1 , wherein each of the first and second alignment layers includes a polyimide compound and a polyamic acid compound.

7. The display device of claim 1 , wherein the backlight assembly comprises:

a light guide plate configure to guide light toward the display panel; and

a lamp unit facing a side surface of the light guide plate.

8. The display device of claim 7 , wherein the heat sink member is overlapped with the lamp unit.

9. The display device of claim 8 , wherein the a length of a longer side of the heat sink member is substantially the same as that of a longer side of the display panel, and a length of a shorter side of the heat sink member is about 100 mm to about 160 mM.

10. A method of manufacturing a display device, the method comprising:

forming a pixel electrode electrically connected to a switching device on a pixel region of a first substrate;

forming a first alignment layer on the pixel electrode;

forming a common electrode layer on a surface of a second substrate facing the first substrate;

forming a second alignment layer on the common electrode layer;

interposing a liquid crystal composition between the first and second substrates, the liquid crystal composition having a nematic-to-isotropic transition temperature higher than about 80° C. and a refractive index anisotropy (Δn) of about 0.1 to about 0.12;

applying a voltage to the first and second substrates interposing the liquid crystal composition to pre-tilt the liquid crystal composition by an angle of about 4.5° to about 5.5°, thereby forming a display panel having a liquid crystal layer;

providing a backlight assembly providing a light to the display panel;

providing a receiving container receiving the backlight assembly; and

disposing a heat sink member between the backlight assembly and the receiving container.

11. The method of claim 10 , wherein the voltage is about 4 V to about 5 V.

12. The method of claim 10 , wherein the liquid crystal composition includes a first liquid crystal compound and a second liquid crystal compound, the first liquid crystal compound includes at least one selected from the group consisting of compounds represented by the following Chemical Formulas 1 and 2, and the second liquid crystal compound includes a compound represented by the following Chemical Formula 3, wherein X 1 , X 2 , X 3 and X 4 independently represent an alkyl group having 1 to 4 carbon atoms, a fluorine atom or a chlorine atom where Z 1 , Z 2 and Z 3 independently represent

and Y represents a fluorine atom or a hydrogen atom.

13. The method of claim 10 , wherein each of the first and second alignment layers includes a polyimide compound and a polyamic acid compound.

14. The method of claim 10 , wherein the backlight assembly comprises:

a light guide plate configured to guide the light to provide the light to the display panel; and

a lamp unit facing a side surface of the light guide plate.

15. The method of claim 14 , wherein the heat sink member is overlapped with the lamp unit.