Light emitting device for display and unit pixel having the same
A light emitting device for a display including a light emitting structure including a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, and having a side surface exposing the active layer, in which a portion of the second conductivity type semiconductor layer and the active layer along an edge of the light emitting structure is insulative in a thickness direction to define an insulation region, and the insulation region includes implanted ions.
1. A display apparatus, comprising:
a circuit board including a conductive pattern;
a unit pixel disposed on the circuit board and including a first emitter, a second emitter, and a third emitter;
an insulation layer disposed on the circuit board;
a cover layer covering the unit pixel; and
a light shield disposed between the circuit board and the cover layer, the light shield including a light absorbing material,
wherein:
the light shield has a window exposing a region of the first, second, and third emitters;
the first emitter is configured to emit light having a first peak wavelength and includes a first elevated surface;
the second emitter is configured to emit light having a second peak wavelength and includes a second elevated surface;
the third emitter is configured to emit light having a third peak wavelength and includes a third elevated surface; and
each of the first, second, and third elevated surfaces includes protrusions that are shorter than or equal to 3 μm.
2. The display apparatus of claim 1 , wherein:
each of the first, second, and third emitters includes a first conductivity type layer, a second conductivity type layer, and an active layer therebetween; and
the protrusions are disposed on the respective first conductivity type layer.
3. The display apparatus of claim 1 , wherein:
the insulation layer includes a first portion overlapping the first, second, or third emitter and a second portion not overlapping the first, second, or third emitter; and
a thickness of the first portion is greater than the second portion.
4. The display apparatus of claim 1 , wherein a width of the window is equal to or greater than a width of at least one of the first, second, and third emitters.
5. The display apparatus of claim 1 , wherein the conductive pattern of the circuit board includes a plurality of pads electrically connected to the first, second, and third emitters.
6. The display apparatus of claim 5 , wherein:
the window is formed in plural for each unit pixel; and
the number of the pads is less than the number of the windows in unit pixels.
7. The display apparatus of claim 6 , wherein at least one of the first, second, and third emitters does not overlap the pads in a plan view.
8. The display apparatus of claim 1 , wherein the first, second, and third emitters in the unit pixel are linearly arranged in a plan view.
9. A display apparatus, comprising:
a circuit board including a conductive pattern;
a unit pixel disposed on the circuit board and including a plurality of emitters;
an insulation layer disposed on the circuit board;
a cover layer covering the unit pixel; and
a light shield disposed between the circuit board and the cover layer, the light shield including a light absorbing material,
wherein:
the light shield has a window exposing a region of the plurality of emitters;
each of the plurality of emitters includes an elevated surface between the circuit board and the cover layer;
the elevated surface includes a plurality of protrusions disposed in a light emission path of each of the emitters.
10. The display apparatus of claim 9 , wherein:
each of the emitters includes a first conductivity type layer, a second conductivity type layer, and an active layer therebetween; and
the protrusions are disposed on the respective first conductivity type layer.
11. The display apparatus of claim 9 , wherein:
the insulation layer includes a first portion overlapping the emitter and a second portion not overlapping the emitter; and
a thickness of the first portion is greater than the second portion.
12. The display apparatus of claim 9 , wherein a width of the window is equal to or greater than a width of at least one of the plurality of emitters.
13. The display apparatus of claim 9 , wherein the conductive pattern of the circuit board includes a plurality of pads electrically connected to the emitters.
14. The display apparatus of claim 13 , wherein:
the window is formed in plural for each unit pixel; and
the number of the pads is less than the number of the windows in unit pixels.
15. The display apparatus of claim 14 , wherein at least one of the first, second, and third emitters does not overlap the pads in a plan view.
16. The display apparatus of claim 9 , wherein the emitters in the unit pixel are linearly arranged in a plan view.