Tiled display device

1. A tiled display device comprising:

a plurality of display devices, each of the display devices comprising a substrate anda plurality of pixels on the substrate; and

a thermally variable member between adjacent ones of the substrates of the plurality of display devices, the thermally variable member comprising a material whose light transmittance is different depending on a temperature.

2. The tiled display device of claim 1 , wherein the thermally variable member comprises a thermochromic material.

3. The tiled display device of claim 2 , wherein the thermally variable member further comprises a resin and light scattering particles, and

wherein the thermochromic material and the light scattering particles are dispersed in the resin.

4. The tiled display device of claim 3 , wherein the thermally variable member comprises: the resin within a range of 20% by weight to 50% by weight; the light scattering particles within a range of 30% by weight to 50% by weight; and the thermochromic material within a range of 20% by weight to 30% by weight.

5. The tiled display device of claim 2 , wherein the thermochromic material exhibits a black color at a temperature lower than or equal to a first reference temperature, and

wherein the thermochromic material is transparent at a temperature exceeding the first reference temperature.

6. The tiled display device of claim 5 , wherein an external light reflectance of the display device has a range of 1% or less at the temperature lower than or equal to the first reference temperature, and

wherein an external light reflectance of the thermally variable member has a range of 5% or less at the temperature lower than or equal to the first reference temperature.

7. The tiled display device of claim 5 , wherein the thermochromic material is configured to experience a reversible a light transmittance change at the first reference temperature.

8. The tiled display device of claim 1 , wherein a light transmittance of the thermally variable member increases as its temperature increases.

9. The tiled display device of claim 8 , wherein the thermally variable member has an external light reflectance of 5% or less at a temperature lower than or equal to a first reference temperature, and

wherein the thermally variable member has a light transmittance of 80% or more at a temperature higher than or equal to the first reference temperature.

10. The tiled display device of claim 9 , wherein the first reference temperature has a range of 45° C. to 60° C.

11. The tiled display device of claim 9 , wherein a difference between an external light reflectance of the display device and the external light reflectance of the thermally variable member at the temperature lower than or equal to the first reference temperature has a range of 4% or less.

12. The tiled display device of claim 11 , wherein the display device has a plurality of emission areas and a light blocking area extending around a periphery of the emission areas, and

wherein the external light reflectance of the display device is equal to an average value of an external light reflectance of the emission areas and an external light reflectance of the light blocking area.

13. The tiled display device of claim 1 , wherein the thermally variable member is on a side surface of the display device between the plurality of display devices.

14. The tiled display device of claim 13 , wherein the thermally variable member covers the side surface of the display device.

15. A tiled display device comprising:

a first display device having a plurality of emission areas and a light blocking area extending around a periphery of the emission areas;

a second display device spaced apart from the first display device and having a plurality of emission areas and a light blocking area extending around a periphery of the emission areas; and

a thermally variable member on each side surface of the first display device and the second display device facing and being spaced apart from each other between the first display device and the second display device,

wherein the thermally variable member comprises a material whose light transmittance is different depending on a temperature.

16. The tiled display device of claim 15 , wherein the thermally variable member comprises a thermochromic material.

17. The tiled display device of claim 16 , wherein the thermochromic material exhibits a black color at a temperature lower than or equal to a first reference temperature, and

wherein the thermochromic material is transparent at a temperature exceeding the first reference temperature.

18. The tiled display device of claim 15 , wherein a light transmittance of the thermally variable member increases as its temperature increases.

19. The tiled display device of claim 18 , wherein the thermally variable member has an external light reflectance of 5% or less at a temperature lower than or equal to a first reference temperature, and

wherein the thermally variable member has a light transmittance of 80% or more at a temperature higher than or equal to the first reference temperature.

20. The tiled display device of claim 19 , wherein an external light reflectance of the first and second display devices is equal to an average value of an external light reflectance of each emission area of the first and second display devices and an external light reflectance of each light blocking area of the first and second display devices, respectively, and

wherein a difference between the external light reflectance of the first and second display devices and the external light reflectance of the thermally variable member at the temperature lower than or equal to the first reference temperature has a range of 4% or less.