Photoluminescent panel, photoluminescent liquid crystal display device, and method of manufacturing the photoluminescent panel
A photoluminescent panel includes a lower substrate, an upper substrate facing the lower substrate, a liquid crystal layer disposed between the lower substrate and the upper substrate, and a color conversion layer disposed on the upper substrate. The color conversion layer includes a light excitation particle which absorbs light having a desired wavelength and emits excited light, and a scattering particle which scatters the excited light.
1. A photoluminescent panel comprising:
a lower substrate;
an upper substrate facing the lower substrate and comprising a plurality of color areas spaced apart from each other by a gap therebetween;
a liquid crystal layer between the lower substrate and the upper substrate; and
a color conversion layer on the upper substrate, and comprising:
a reflection wall provided in plural to define pairs of adjacent reflection walls among which first pairs of adjacent reflection walls define the color areas therebetween; and
a flattening layer commonly disposed between each pair of adjacent reflection walls, the flattening layer comprising a base material layer in which a light excitation particle which absorbs light having a desired wavelength and emits excited light, and a scattering particle which scatters the excited light are distributed,
wherein a same base material layer including a portion of the base material layer in which the light excitation particle is disposed extends from between the first pairs of adjacent reflection walls to be disposed at the gap between color areas.
2. The photoluminescent panel of claim 1 , wherein the color conversion layer further comprises a first area in which the light excitation particle is disposed and a second area in which the scattering particle is disposed, and the first area is above the second area.
3. The photoluminescent panel of claim 1 , wherein the color conversion layer further comprises a first area in which the light excitation particle is disposed and a second area in which the scattering particle is disposed, and the first area is below the second area.
4. The photoluminescent panel of claim 1 , wherein the flattening layer disposed in the color areas spaced apart from each other further comprises a plurality of light excitation particles and a plurality of scattering particles interspersed with each other therein.
5. The photoluminescent panel of claim 1 , wherein
the color conversion layer further comprises a light blocking pattern, and
the reflection wall is elongated in a substantially perpendicular direction with respect to a lower surface of the light blocking pattern.
6. The photoluminescent panel of claim 5 , wherein
a cross-sectional side surface of the light blocking pattern has a curved or a stepped shape,
the reflection wall contacts and covers the cross-sectional side surface of the light blocking pattern, and
an end portion of the reflection wall is elongated in the substantially perpendicular direction with respect to the lower surface of the light blocking pattern.
7. The photoluminescent panel of claim 5 , wherein the light blocking pattern has a first width at an upper portion thereof and a second width at a lower portion thereof, and the first width is different from the second width.
8. The photoluminescent panel of claim 7 , wherein
the light blocking pattern has a tilted cross-sectional side surface, and
the reflection wall contacts and covers the tilted cross-sectional side surface of the light blocking pattern.
9. The photoluminescent panel of claim 1 , wherein the color conversion layer further comprises a plurality of light excitation particles emitting different color lights, the light excitation particles comprising at least two materials among a green phosphor, a red phosphor and a yellow phosphor.
10. The photoluminescent panel of claim 1 , wherein the color conversion layer further comprises a plurality of light excitation particles emitting different color lights, the light excitation particles comprising at least two materials among a green quantum dot, a red quantum dot and a blue quantum dot.
11. The photoluminescent panel of claim 1 , wherein the scattering particle comprises titanium oxide or silicon oxide.
12. A photoluminescent liquid crystal display device comprising:
a backlight unit which emits light having a desired wavelength;
a first substrate on the backlight unit;
a second substrate facing the first substrate and comprising a plurality of color areas spaced apart from each other by a gap therebetween;
a liquid crystal layer between the first and the second substrates; and
a color conversion layer on the second substrate, and comprising
a reflection wall provided in plural to define pairs of adjacent reflection walls among which first pairs of adjacent reflection walls define the color areas therebetween; and
a flattening layer commonly disposed between each pair of adjacent reflection walls, the flattening layer comprising a base material layer in which a light excitation particle which absorbs light having a desired wavelength and emits excited light, and a scattering particle which scatters the excited light are distributed,
wherein a same base material layer including a portion of the base material layer in which the light excitation particle is disposed extends from between the first pairs of adjacent reflection walls to be disposed at the gap between color areas.
13. The photoluminescent liquid crystal display device of claim 12 , wherein the color conversion layer further comprises:
a light blocking pattern which blocks the excited lights.
14. The photoluminescent liquid crystal display device of claim 13 , wherein the reflection wall is elongated in a substantially perpendicular direction with respect to a lower surface of the light blocking pattern.
15. The photoluminescent liquid crystal display device of claim 12 , further comprising an optical filter layer between the color conversion layer and the second substrate.