Pixel structure, display device including the pixel structure, and method of manufacturing the pixel structure

Patent metadata

Field	Value
Publication number	US-10249603-B2
Application number	US-201715622524-A
Country	US
Kind code	B2
Filing date	Jun 14, 2017
Priority date	Jun 14, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

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.

First claim

What is claimed is:

1. A pixel structure, comprising:
a base substrate;
a plurality of first electrodes arranged in an upper portion of the base substrate;
a plurality of second electrodes each having a circular shape extending along a circumferential direction around an outer edge of one first electrode such that one second electrode surrounds the at least one first electrode; and
a plurality of LED elements connected between at least one first electrode and at least one adjacent second electrode such that the at least one first electrode is closer to a center of a circle formed by the circular-shaped at least one adjacent second electrode than the plurality of LED elements and the at least one adjacent second electrode,
wherein:
each second electrode of the plurality of second electrodes 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 being spaced apart from each other, and
the pixel structure further includes:
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.

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 a separation distance between the at least one first electrode and the at least one second electrode is about 1 μm to about 7 μm.

4. 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 first sub-second electrode and second sub-second electrode of the at least one second electrode.

5. The pixel structure as claimed in claim 1 , wherein a separation distance between one first sub-second electrode and one adjacent first electrode is different from a separation distance between one second sub-second electrode and the one adjacent first electrode.

6. The pixel structure as claimed in claim 5 , wherein the separation distances are each independently about 1 μm to about 7 μm.

7. A display device, comprising:
the pixel structure as claimed in claim 1 ; and
a driving circuit connected to the pixel structure.

8. A method of manufacturing the pixel structure as claimed in claim 1 , the method comprising:
applying the plurality of LED elements and a solvent on the plurality of first electrodes and the plurality of second electrodes;
respectively applying different voltages to the plurality of first electrodes and the plurality of second electrodes; and
aligning the LED elements between adjacent ones of the plurality of first electrodes and the plurality of second electrodes.

9. The method as claimed in claim 8 , wherein:
a separation distance between one first electrode and an adjacent second electrode is about 1 μm to about 7 μm, and
a difference between voltages applied to the one first electrode and the adjacent second electrode is about 10 V to about 50 V.

10. The method as claimed in claim 8 , wherein applying different voltages to one first electrode and an adjacent second electrode includes radially generating a first electric field around the one first electrode and between the one first electrode and the adjacent second electrode.

11. The method as claimed in claim 8 , wherein:
a same voltage is applied to each of the first electrodes, and
a same voltage is applied to each of the second electrodes.

12. The method as claimed in claim 8 , wherein:
the first sub-second electrode includes a plurality of first sub-second electrodes,
the second sub-second electrode includes a plurality of second sub-second electrodes, and
applying different voltages to the electrodes 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.

13. The method as claimed in claim 12 , wherein:
a first sub-electric field is generated between one first electrode and one adjacent first sub-second electrode,
a second sub-electric field is generated between the one first electrode and one adjacent 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 one first electrode.

14. The method as claimed in claim 12 , wherein a second electric field is generated between the one first sub-second electrode and a second sub-second electrode of an adjacent pixel structure.

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

16. The method as claimed in claim 15 , wherein:
the separation distances are each independently about 1 μm to about 7 μm,
a voltage difference between the one first electrode and the one adjacent first sub-second electrode is about 10 V to about 50 V, and
a voltage difference between the one first electrode and the one adjacent second sub-second electrode is about 10 V to about 50 V.

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Hyunmin
• Kim Daehyun
• Im Hyundeok
• Kang Jonghyuk
• Park Jaebyung
• Lee Jooyeol
• Cho Chio
• Hong Sungjin

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/819 Primary

  characterised by their shape, e.g. curved or truncated substrates · CPC title

• H05B33/26 Primary

  characterised by the composition or arrangement of the conductive material used as an electrode · CPC title

• H05B33/10

  Apparatus or processes specially adapted to the manufacture of electroluminescent light sources · CPC title

• H01L25/167 Primary

  Electricity · mapped topic