Light source member and display device including the same
A light source member including a guide panel, a light source disposed adjacent to at least one side of the guide panel, a low refractive layer disposed on the guide panel, and a color converting layer disposed on the low refractive layer and including a base resin and a quantum dot dispersed in the base resin, in which the low refractive layer includes a matrix part, a plurality of low refractive substances dispersed in the matrix part, and a void disposed in the matrix part, and an area occupied by the void is less than about 20% of an entire area of the low refractive layer.
1. A light source member comprising:
a guide panel;
a light source disposed adjacent to at least one side of the guide panel;
a low refractive layer disposed on the guide panel; and
a color converting layer disposed on the low refractive layer and comprising a base resin and a quantum dot dispersed in the base resin,
wherein:
the low refractive layer comprises a matrix part, a plurality of low refractive substances dispersed in the matrix part, and a void disposed in the matrix part; and
an area occupied by the void is less than about 20% of an entire area of the low refractive layer.
2. The light source member of claim 1 , wherein the low refractive layer has a refractive index in a range of about 1.0 to about 1.26.
3. The light source member of claim 1 , wherein the low refractive substances comprise at least one of hollow silica, aerogel, a porous inorganic particles including a pore, and a porous organic particles including a pore.
4. The light source member of claim 1 , further comprising a capping layer disposed between the low refractive layer and the color converting layer, the capping layer including at least one of a silicon nitride, a silicon oxide, and a silicon oxynitride.
5. The light source member of claim 4 , wherein the capping layer has a thickness of at least about 0.2 μm.
6. The light source member of claim 1 , further comprising a barrier layer disposed on the color converting layer and comprising at least one inorganic layer.
7. The light source member of claim 6 , wherein the barrier layer further comprises an organic layer disposed on the at least one inorganic layer.
8. The light source member of claim 1 , wherein the low refractive layer has a thickness in a range of about 0.5 μm to about 2.5 μm.
9. The light source member of claim 1 , wherein the low refractive layer further comprises a resin.
10. The light source member of claim 1 , wherein the guide panel comprises a plurality of light extraction pattern parts disposed on a bottom surface thereof.
11. The light source member of claim 10 , wherein each of the light extraction pattern parts has a convex lens shape protruding from the bottom surface of the guide panel.
12. The light source member of claim 1 , wherein the light source comprises a circuit board and a light emitting diode package disposed on the circuit board.
13. The light source member of claim 12 , wherein:
the light emitting diode package is configured to emit first light having a central wavelength in a range of about 440 nm to about 460 nm; and
the quantum dot comprises at least one of:
a first quantum dot configured to be excited by the first light to emit second light having a central wavelength in a wavelength range of about 520 nm to about 550 nm; and
a second quantum dot configured to be excited by at least one of the first light and the second light to emit third light having a central wavelength in a wavelength range of about 600 nm to about 650 nm.
14. The light source member of claim 1 , wherein:
the light source is configured to emit blue light; and
the quantum dot comprises at least one of a first quantum dot configured to be excited by the blue light to emit green light, and a second quantum dot configured to be excited by the blue light to emit red light.
15. A light source member comprising:
a light source configured to emit blue light;
a guide panel having one side surface facing a light emitting surface of the light source;
a low refractive layer disposed on the guide panel;
a capping layer disposed on the low refractive layer and including an inorganic material;
a color converting layer disposed on the capping layer and comprising a quantum dot; and
a barrier layer disposed on the color converting layer,
wherein:
the low refractive layer comprises a matrix part, a plurality of low refractive substances dispersed in the matrix part, and a void disposed in the matrix part; and
an area occupied by the void is less than about 20% of an entire area of the low refractive layer.
16. The light source member of claim 15 , wherein the low refractive layer is disposed directly on the guide panel.
17. The light source member of claim 15 , wherein the barrier layer covers the color converting layer.
18. A display device comprising:
a light source member; and
a display panel disposed on the light source member,
wherein the light source member comprises:
a guide panel;
a light source disposed adjacent to at least one side of the guide panel;
a low refractive layer disposed on the guide panel; and
a color converting layer disposed on the low refractive layer and comprising a base resin and a quantum dot dispersed in the base resin,
wherein the low refractive layer comprises a matrix part, a plurality of low refractive substances dispersed in the matrix part, and a void disposed in the matrix part, and
wherein an area occupied by the void is less than about 20% of an entire area of the low refractive layer.
19. The display device of claim 18 , wherein the display panel includes a liquid crystal display panel comprising a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate.
20. The display device of claim 18 , wherein the light source member and the display panel are spaced apart from each other.