Lighting module and lighting apparatus having thereof

1. A lighting module comprising:

a substrate;

a plurality of light emitting devices disposed on the substrate in one or more rows;

a first resin layer formed around the plurality of light emitting devices;

a first diffusion layer disposed directly on the first resin layer and diffusing light emitted from the first resin layer; and

a second diffusion layer disposed on the first diffusion layer and diffusing light emitted from the first diffusion layer,

wherein the first diffusion layer comprises a diffusing agent,

wherein the second diffusion layer comprises ink particles and a phosphor,

wherein an interval between the plurality of light emitting devices is equal to or greater than a thickness of the first resin layer,

wherein light emitted to an outside through the second diffusion layer has a light uniformity of 90% or more,

wherein the first resin layer and the first diffusion layer are formed of a first resin material, and the second diffusion layer is formed of a second resin material that differs from the first resin material,

wherein a refractive index of the second diffusion layer is greater than a refractive index of the first resin layer and the first diffusion layer,

wherein a straight distance between a lower surface of the substrate and an upper surface of the second diffusion layer is in a range of 1.8 to 2.2 times the thickness of the first resin layer,

wherein a color of the ink particles corresponds to a color of wavelength-converted light outputted by the phosphor, and

wherein the ink particles in the second diffusion layer block incident light.

2. The lighting module of claim 1 ,

wherein a thickness of the first diffusion layer is in a range of 40% to 80% of the thickness of the first resin layer, and

wherein a thickness of the second diffusion layer is 25% or less of the thickness of the first diffusion layer.

3. The lighting module of claim 2 ,

wherein a size of the diffusion agent is larger than a wavelength of the light emitted from one of the plurality of light emitting devices,

wherein the size of the diffusing agent is in a range of 4 μm to 6 μm, and

wherein the diffusing agent has a refractive index in a range of 1.4 to 2.

4. The lighting module of claim 3 ,

wherein the phosphor has a size in a range of 1 μm to 100 μm, and

wherein a content of the phosphor includes a range of 40 wt % to 60 wt % in a resin material of the second diffusion layer.

5. The lighting module of claim 1 ,

wherein the refractive index of the second diffusion layer is in a range of 1.45 to 1.6,

wherein the light emitting device emits blue light,

wherein the second diffusion layer emits red light, and

wherein a surface color of the second diffusion layer comprises a red-based color.

6. The lighting module of claim 4 ,

wherein a content of the phosphor added to the second diffusion layer is 5 times or more than a content of the diffusion agent added to the first diffusion layer, and

wherein the second diffusion layer includes a side portion extending from an edge of an upper surface of the first diffusion layer toward the substrate.

7. A lighting module comprising:

a substrate;

a plurality of light emitting devices on the substrate;

a first resin layer encapsulating the plurality of light emitting devices, wherein the first resin layer includes a diffusing agent in a range of 1 to 3 wt %; and

a second resin layer comprising ink particles and a phosphor, the second resin layer being positioned on the first resin layer,

wherein a content of the ink particles in the second resin layer is less than a content of the phosphor in second resin layer, and a weight of the ink particles is less than a weight of the phosphor so that the ink particles are distributed in greater concentration than the phosphor in an outer region of the second resin layer that is opposite to the plurality of emitting devices,

wherein a color of the ink particles corresponds to a color of wavelength-converted light outputted by the phosphor, and

wherein the ink particles in the second resin layer block incident light.

8. The lighting module of claim 7 ,

wherein the phosphor and the ink particles are spaced apart from the plurality of light emitting devices.

9. The lighting module of claim 7 ,

wherein a content of the phosphor in the second resin layer is in a range of 12 wt % to 23 wt %, and

wherein a content of the ink particles in the second resin layer is in a range of 3 wt % to 13 wt %.

10. The lighting module of claim 7 ,

wherein a thickness of the second resin layer is less than a thickness of the first resin layer.

11. The lighting module of claim 7 ,

wherein the phosphor emits light having a longer wavelength than a wavelength of the light emitted from the plurality of light emitting devices, and

wherein the ink particles have a same color series as the phosphor.

12. The lighting module of claim 7 ,

wherein the wavelength emitted from the phosphor and the ink particle comprise a same red color, and

wherein the plurality of light emitting devices emit a wavelength in a range of 420 nm to 470 nm.

13. The lighting module of claim 10 ,

wherein a straight distance between a lower surface of the substrate and an upper surface of the second resin layer is 220% or less of the thickness of the first resin layer, and

wherein the thickness of the second resin layer comprises a range of 40% to 80% of the thickness of the first resin layer.

14. The lighting module of claim 10 ,

wherein the second resin layer comprises a side portion extending on a side surface of the first resin layer, and

wherein the side portion of the second resin layer contacts the substrate and comprises the phosphor and the ink particles.

15. The lighting module of claim 7 , comprising:

a light shielding portion disposed between the first and second resin layers and overlapped with at least one of the plurality of light emitting devices in a vertical direction.

16. The lighting module of claim 7 ,

wherein an outer surface of the second resin layer provides red color, and

wherein a chroma value at the outer surface of the second resin layer is lower than a chroma value of light emitted through the second resin layer.

17. The lighting module of claim 7 ,

wherein each of the plurality of light emitting devices comprises:

a light transmitting substrate;

a light emitting structure including a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer under the light transmitting substrate;

a first electrode connected to the first conductivity type semiconductor layer under the light emitting structure; and

a second electrode connected to the second conductivity type semiconductor layer under the light emitting structure, and

wherein the first electrode and the second electrode of the light emitting device face the substrate and are electrically connected to the substrate.

18. A lighting module comprising:

a substrate;

a plurality of light emitting devices disposed on the substrate;

a first resin layer having a defusing agent for diffusing light emitted from the plurality of light emitting devices;

a second resin layer for diffusing light emitted from the plurality of light emitting devices; and

a third resin layer for diffusing light emitted from the plurality of light emitting devices,

wherein the second resin layer is positioned between the first resin layer and the third resin layer, and comprises a phosphor,

wherein the third resin layer includes ink particles having at least one of a metal ink, an ultraviolet (UV) ink, or a curing ink,

wherein an interval between an adjacent pair of the plurality of light emitting devices is equal to or greater than respective thicknesses of the first resin layer, the second resin layer, and the third resin layer,

wherein the thickness of the third resin layer is less than the thickness of the second resin layer,

wherein a combined thickness of the third and second resin layers is less than the thickness of the first resin layer,

wherein a straight distance between a lower surface of the substrate and an upper surface of the third resin layer is in a range of 1.8 to 2.2 times the thickness of the first resin layer, and

wherein the third resin layer includes an upper portion that extends along an upper surface of the second resin layer and a side portion that extends along a side surface of at least one of the first or second resins layers, and a content of the ink particles in the side portion of the third layer is greater than a content of the ink particles in the upper portion of the third layer.

19. The lighting module of claim 18 ,

wherein a content of the phosphor in the second resin layer is 10 wt % or more, and

wherein a content of the ink particles in the third resin layer is in a range of 4 wt % to 12 wt %,

wherein the ink particles correspond to a red color, and

wherein a thickness of the first resin layer is a range of 3 mm to 4 mm.

20. The lighting module of claim 1 , further comprising:

light shielding ink printed at at least one region of a lower surface of the second diffusion layer, the at least one region vertically overlapping a top surface of at least one of the plurality of light emitting devices.