Light source package and display device including the same
Provided are a light source package and a display device including the light source package. The light source package includes a substrate; a light-emitting device mounted on the substrate; a red phosphor layer formed adjacent to a surface of the light-emitting device; and an encapsulation layer for encapsulating the light-emitting device and the red phosphor layer, wherein a phosphor of the red phosphor layer is a fluoride-based red phosphor or a sulfide-based red phosphor. The light source package and the display device including the light source package display excellent color reproduction, without discoloration due to moisture after a long period of time.
1. A light source package comprising:
a substrate;
a blue light emitting device (LED) disposed on the substrate;
a quantum dot disposed at the LED, and including a core and a shell; and
an encapsulation layer encapsulating the LED and the quantum dot,
wherein a wavelength of a peak of blue light that is emitted from the blue LED is between 442 nm and 457 nm, and
wherein a size of the core is between 3 nm and 10 nm.
2. The light source package of claim 1 , wherein the blue LED has a flip-chip structure.
3. The light source package of claim 1 , wherein the blue LED includes:
a first conductive semiconductor layer;
an active layer disposed on the first conductive semiconductor layer;
a second conductive semiconductor layer disposed on the active layer;
a first electrode that is a conductive via contacting the first conductive semiconductor layer, the conductive via penetrating the active layer and the second conductive semiconductor layer,
a second electrode disposed on the second conductive semiconductor layer, and formed of a light-transmitting conductive material; and
an insulation unit separating the first electrode and the second electrode, the insulation unit having a light reflection structure.
4. The light source package of claim 3 , wherein the first electrode and the second electrode face an opposite side of a light extraction surface.
5. The light source package of claim 3 , wherein a light reflective filler in the light reflection structure is distributed throughout a light transmitting material.
6. The light source package of claim 1 , further comprising a blocking layer disposed on the quantum dot.
7. The light source package of claim 1 , further comprising a reflector disposed on the substrate,
wherein a side wall of the reflector faces the LED.
8. The light source package of claim 7 , wherein the reflector is formed of a thermocurable resin or a thermoplastic.
9. The light source package of claim 1 , wherein a size of the shell is between 0.5 nm and 2 nm.
10. A light source package comprising:
a substrate;
a blue light emitting device (LED) disposed on the substrate;
a quantum dot disposed at the LED, and including a core and a shell; and
an encapsulation layer encapsulating the LED and the quantum dot,
wherein the blue LED has a flip-chip structure, and includes:
a first conductive semiconductor layer;
an active layer disposed on the first conductive semiconductor layer;
a second conductive semiconductor layer disposed on the active layer;
a first electrode that is a conductive via contacting the first conductive semiconductor layer, the conductive via penetrating the active layer and the second conductive semiconductor layer;
a second electrode disposed on the second conductive semiconductor layer, and formed of a light-transmitting conductive material; and
an insulation unit separating the first electrode and the second electrode, the insulation unit having a light reflection structure.
11. The light source package of claim 10 , wherein a light reflective filler in the light reflection structure is distributed throughout a light transmitting material.
12. The light source package of claim 10 , wherein a wavelength of a peak of blue light that is emitted from the blue LED is between 442 nm and 457 nm.
13. The light source package of claim 10 ,
wherein a size of the core is between 3 nm and 10 nm, and
wherein a size of the shell is between 0.5 nm and 2 nm.
14. The light source package of claim 10 , wherein the substrate includes an insulating layer and an electrode wire.
15. The light source package of claim 14 , wherein the LED is electrically connected to the electrode wire via a conductive connector.
16. A display device comprising:
a light source package;
wherein the light source package includes:
a substrate;
a blue light emitting device (LED) disposed on the substrate;
a quantum dot disposed at the LED, and including a core and a shell; and
an encapsulation layer encapsulating the LED and the quantum dot,
wherein a wavelength of a peak of blue light that is emitted from the blue LED is between 442 nm and 457 nm, and
wherein a size of the core is between 3 nm and 10 nm.
17. The display device of claim 16 , wherein the blue LED includes:
a first conductive semiconductor layer;
an active layer disposed on the first conductive semiconductor layer;
a second conductive semiconductor layer disposed on the active layer;
a first electrode that is a conductive via contacting the first conductive semiconductor layer, the conductive via penetrating the active layer and the second conductive semiconductor layer,
a second electrode disposed on the second conductive semiconductor layer, and formed of a light-transmitting conductive material; and
an insulation unit separating the first electrode and the second electrode, the insulation unit having a light reflection structure.
18. The display device of claim 16 ,
wherein a size of the core is between 3 nm and 10 nm, and
wherein a size of the shell is between 0.5 nm and 2 nm.
19. The display device of claim 16 , wherein the light source package includes:
a blocking layer disposed on the quantum dot; and
a reflector disposed on the substrate.
20. The display device of claim 16 ,
wherein the core is formed of CdSe or InP, and
wherein the shell is formed of ZnS or ZnSe.