Title:
LIGHT EMITTING ELEMENT, DISPLAY DEVICE, MANUFACTURING METHOD OF LIGHT EMITTING ELEMENT, AND MANUFACTURING METHOD OF DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/208641
Kind Code:
A1
Abstract:
Light emitting elements (6R, 6G, 6B) each include an anode (10), a light emitting layer (14), and a cathode (18) arranged in this order. A light emitting layer includes a plurality of quantum dots (26B) and an insulating material (28). The average value of the distance (14DA) between the quantum dots in the anode-side end face portion (14BA) of the light-emitting layer and the anode-side end face (14EA) of the light-emitting layer is smaller than the average value of the distance (14DC) between the quantum dots in the cathode-side end face portion (14BC) of the light-emitting layer and the cathode-side end face (14EC) of the light-emitting layer. Further, a display device (2) includes a bank 20 for partitioning the light emitting elements for each sub-pixel (SPR, SPG, SPB). The light emitting layer includes a main light emitting portion including a light emitting material and an outer edge portion that is arranged at a position surrounding a main light emitting region in plan view of a substrate (4) and includes a deactivated material in which the light emitting material has been deactivated. The bank has a forward taper surface (20S) on the side surface and is in contact with the outer edge portion on the forward taper surface.
Inventors:
UETA YOSHIHIRO
ASAOKA YASUSHI
YAGUCHI YUMA
ASAOKA YASUSHI
YAGUCHI YUMA
Application Number:
PCT/JP2021/013457
Publication Date:
October 06, 2022
Filing Date:
March 30, 2021
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
H01L27/32; H01L51/50; H05B33/10; H05B33/14
Domestic Patent References:
| WO2020054764A1 | 2020-03-19 | |||
| WO2016047483A1 | 2016-03-31 |
Foreign References:
| JP2020161476A | 2020-10-01 | |||
| JP2007095685A | 2007-04-12 | |||
| JP2010532794A | 2010-10-14 | |||
| CN110707219A | 2020-01-17 | |||
| JP2018153915A | 2018-10-04 | |||
| KR101350257B1 | 2014-01-16 | |||
| JP2020525985A | 2020-08-27 | |||
| JP2008166127A | 2008-07-17 | |||
| US20170244061A1 | 2017-08-24 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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