Scan needle and scan display system including same

1. A scan needle, comprising,

a substrate;

a first color light emitting pixel array comprising a plurality of first color light emitting pixels formed on the substrate;

a second color light emitting pixel array comprising a plurality of second color light emitting pixels formed on the substrate; and

a third color light emitting pixel array comprising a plurality of third color light emitting pixels formed on the substrate,

wherein

one of the first color light emitting pixel comprises a first segment of a first color light emitting layer,

one of the second color light emitting pixel comprises a second segment of the first color light emitting layer and a first segment of a second color light emitting layer, sequentially stacked on the substrate, and

one of the third color light emitting pixel comprises a third segment of the first color light emitting layer, a second segment of the second color light emitting layer, and a third color light emitting layer, sequentially stacked on the substrate.

2. The scan needle according to claim 1 , wherein:

the plurality of first color light emitting pixels in the first color light emitting pixel array are formed in a single row or in a two-dimensional array having at least two rows and two columns;

the plurality of second color light emitting pixels in the second color light emitting pixel array are formed in a single row or in a two-dimensional array having at least two rows and two columns; and

the plurality of third color light emitting pixels in the third color light emitting pixel array are formed in a single row or in a two-dimensional array having at least two rows and two columns.

3. The scan needle according to claim 2 , wherein:

the first color light emitting pixel array is a 4000×50 array;

the second color light emitting pixel array is a 4000×50 array; and

the third color light emitting pixel array is a 4000×50 array.

4. The scan needle according to claim 1 , wherein:

a pitch of the first color light emitting pixels in a row of the first color light emitting pixel array is less than 5 μm;

a spacing between the first color light emitting pixel array and the second color light emitting pixel array is less than 100 μm;

a pitch of the second color light emitting pixels in a row of the second color light emitting pixel array is less than 5 μm;

a spacing between the second color light emitting pixel array and the third color light emitting pixel array is less than 100 μm; and

a pitch of the third color light emitting pixels in a row of the third color light emitting pixel array is less than 5 μm.

5. The scan needle according to claim 1 , wherein:

an aspect ratio of the first color light emitting pixel array is not less than 10:1;

a size of one of the first color light emitting pixels in a row direction of the first color light emitting pixel array is same as a size of one of the second color light emitting pixels in a row direction of the second color light emitting pixel array; and

the size of the one of the second color light emitting pixels in the row direction of the second color light emitting pixel array is same as a size of one of the third color light emitting pixels in a row direction of the third color light emitting pixel array.

6. The scan needle according to claim 5 , wherein the aspect ratio of the first color light emitting pixel array is not less than 100:1.

7. The scan needle according to claim 1 , wherein:

each of the first color light emitting pixels comprises a first color light emitting diode;

each of the second color light emitting pixels comprises a second color light emitting diode; and

each of the third color light emitting pixels comprises a third color light emitting diode.

8. The scan needle according to claim 1 , wherein a total width of the scan needle is not more than 1 mm.

9. The scan needle according to claim 8 , wherein a total aspect ratio of the scan needle is not less than 3:1.

10. The scan needle according to claim 1 , wherein:

a number of the first color light emitting pixels in the first color light emitting pixel array is the same as a number of the second color light emitting pixels in the second color light emitting pixel array; and

the number of the second color light emitting pixels in the second color light emitting pixel array is the same as a number of the third color light emitting pixels in the third color light emitting pixel array.

11. The scan needle according to claim 1 , wherein a shape of each of the first color light emitting pixels, the second color light emitting pixels, and the second color light emitting pixels is circular or rectangular.

12. The scan needle according to claim 1 , wherein:

each of the first color light emitting pixels comprises a red light emitting pixel;

each of the second color light emitting pixels comprises a blue light emitting pixel; and

each of the third color light emitting pixels comprises a green light emitting pixel.

13. The scan needle according to claim 12 , wherein:

an area of one of the first color light emitting pixels is larger than an area of one of the second color light emitting pixels; and

an area of the one of the second light emitting pixels is larger an area of one of the third light emitting pixels.

14. The scan needle according to claim 1 , further comprising:

light-isolating walls formed on the substrate and between the first color light emitting pixel array and the second color light emitting pixel array, and between the second color light emitting pixel array and the third color light emitting pixel array.

15. The scan needle according to claim 14 , wherein a height of the light-isolating walls is greater than a height of the highest one of the first color light emitting pixels, the second color light emitting pixels, and the third color light emitting pixels.

16. The scan needle according to claim 1 , wherein an area of one of the first color light emitting pixels is the same as an area of one of the second color light emitting pixels, and

the area of one of the second color light emitting pixels is the same as an area of one of the third color light emitting pixels.

17. The scan needle according to claim 1 , wherein:

an area of one of the first color light emitting pixels is larger than an area of one of the second color light emitting pixels; and

the area of the one of the second light emitting pixels is larger an area of one of the third light emitting pixels.

18. The scan needle according to claim 1 , further comprising:

microlenses respectively formed on at least one of the first color light emitting pixels, second color light emitting pixels, and third color light emitting pixels.