PIXEL STRUCTURE, DISPLAY DEVICE INCLUDING THE PIXEL STRUCTURE, AND METHOD OF MANUFACTURING THE PIXEL STRUCTURE

• US 20170358563A1
• Filed: 06/14/2017
• Published: 12/14/2017
• Est. Priority Date: 06/14/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHO, Hyunmin, KIM, Daehyun, IM, Hyundeok, KANG, Jonghyuk, PARK, Jaebyung, LEE, Jooyeol, CHO, Chio, HONG, Sungjin
• Granted Patent: US 10,249,603 B2
• Time in Patent Office: Days
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2933/0016 relating to electrodes
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• CPC Class Codes: H01L 33/38 with a particular shape

Abstract

A pixel structure, a display device, and a method of manufacturing a pixel structure, the pixel structure including a base substrate; at least one first electrode arranged in an upper portion of the base substrate; at least one second electrode having a circular shape extending along a circumferential direction around the at least one first electrode; and a plurality of LED elements connected to the first and second electrodes.

Claims

1. A pixel structure, comprising:

a base substrate;

at least one first electrode arranged in an upper portion of the base substrate;

at least one second electrode having a circular shape extending along a circumferential direction around the at least one first electrode; and

a plurality of LED elements connected to the first and second electrodes.

2. The pixel structure as claimed in claim 1, further comprising:

a driving transistor electrically connected to the at least one first electrode; and

a power wiring electrically connected to the at least one second electrode.

3. The pixel structure as claimed in claim 1, wherein the pixel structure includes:

a plurality of the first electrodes,

a plurality of the second electrodes, and

an electrode line connecting the plurality of the second electrodes to each other.

4. The pixel structure as claimed in claim 1, wherein a separation distance between the at least one first electrode and the at least one second electrode is about 1 μ

m about 7 μ

m.

5. The pixel structure as claimed in claim 1, wherein:

the at least one second electrode includes a first sub-second electrode and a second sub-second electrode, the first sub-second electrode and second sub-second electrode each having a semicircular shape, and

the first sub-second electrode and the second sub-second electrode are spaced apart from each other.

6. The pixel structure as claimed in claim 5, further comprising:

a driving transistor electrically connected to the first electrode; and

a power wiring respectively electrically connected to the first sub-second electrode and second sub-second electrode.

7. The pixel structure as claimed in claim 5, wherein the pixel structure includes:

a plurality of the first electrodes,

a plurality of the second electrodes,

a first electrode line connecting a plurality of the first sub-second electrodes to each other; and

a second electrode line connecting a plurality of the second sub-second electrodes to each other.

8. The pixel structure as claimed in claim 5, wherein a separation distance between the first sub-second electrode and one first electrode is different from a separation distance between the second sub-second electrode and the one first electrode.

9. The pixel structure as claimed in claim 8, wherein the separation distances are each independently about 1 μ

m to about 7 μ

m.

10. A display device, comprising:

the pixel structure as claimed in claim 1; and

a driving circuit connected to the pixel structure.

11. A method of manufacturing a pixel structure, the method comprising:

applying a plurality of LED elements and a solvent on at least one first electrode and at least one second electrode, the at least one second electrode having a circular shape extending along a circumferential direction around the at least one first electrode;

respectively applying different voltages to the at least one first electrode and the at least one second electrode; and

aligning the LED elements between the at least one first electrode and the at least one second electrode.

12. The method as claimed in claim 11, wherein:

a separation distance between the at least one first electrode and the at least one second electrode is about 1 μ

m to about 7 μ

m, and

a difference between voltages applied to the at least one first electrode and the at least one second electrode is about 10 V to about 50 V.

13. The method as claimed in claim 11, wherein applying different voltages to the at least one first electrode and the at least one second electrode includes radially generating a first electric field around the at least one first electrode and between the at least one first electrode and the at least one second electrode.

14. The method as claimed in claim 11, wherein:

the at least one first electrode includes a plurality of first electrodes,

the at least one second electrode includes a plurality of second electrodes,

a same voltage is applied to each of the first electrodes, and

a same voltage is applied to each of the second electrodes.

15. The method as claimed in claim 11, wherein:

the at least one second electrode includes at least one first sub-second electrode and at least one second sub-second electrode, the at least one first sub-second electrode and the at least one second sub-second electrode each having a semicircular shape, and

the at least one first sub-second electrode and the at least one second sub-second electrode are spaced apart from each other.

16. The method as claimed in claim 15, wherein:

the at least one first electrode includes a plurality of first electrodes,

the at least one first sub-second electrode includes a plurality of first sub-second electrodes,

the at least one second sub-second electrode includes a plurality of second sub-second electrodes, and

applying different voltages to the at least one first electrode and the at least one second electrode includes;

applying a same voltage to each of the first electrodes, and

applying a same voltage to each of the first sub-second electrodes, and

applying a same voltage to each of the second sub-second electrodes, and

wherein the voltage applied to the first sub-second electrodes is different from the voltage applied to the second sub-second electrodes.

17. The method as claimed in claim 16, wherein:

a first sub-electric field is generated between the at least one first electrode and the at least one first sub-second electrode,

a second sub-electric field is generated between the at least one first electrode and the at least one second sub-second electrode, and

a first electric field, as a combination of the first sub-electric field and the second sub-electric field, is radially generated around the at least one first electrode.

18. The method as claimed in claim 16, wherein a second electric field is generated between one first sub-second electrode and one second sub-second electrode of an adjacent pixel structure.

19. The method as claimed in claim 15, wherein a separation distance between the at least one first sub-second electrode and the at least one first electrode is different from a separation distance between the at least one second sub-second electrode and the at least one first electrode.

20. The method as claimed in claim 19, wherein:

the separation distances are each independently about 1 μ

m to about 7 μ

m,

a voltage difference between the first electrode and the first sub-second electrode is about 10 V to about 50 V, and

a voltage difference between the first electrode and the second sub-second electrode is about 10 V to about 50 V.