IP Library Granted Patent US 8,847,858
Granted Patent B2
US 8,847,858 · App. 13/889,767 · Granted Sep 30, 2014

Organic electroluminescent light emitting display device

Inventors: Toshihiro Sato (Mobara, JP); Genshiro Kawachi (Chiba, JP); Yoshiro Mikami (Hitachiota, JP); Masaya Adachi (Hitachi, JP)
Assignees: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
H01L27/3272G09G2300/0417H01L27/3246G09G2300/0852G09G2300/0439G09G2320/0238G09G3/3233G09G2300/0819H01L51/5284G09G2300/0809G09G3/2011G09G2320/02G09G2320/043G09G2300/0861G09G2320/0233
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Quick Facts
Patent No.
US 8,847,858
App. No.
13/889,767
Granted
Sep 30, 2014
Kind
B2
Abstract

In an organic electroluminescent light emitting display device comprising a plurality of pixels each of which includes an organic electroluminescent element emitting light by a current supplied thereto, a plurality of active elements including a first active element which acquires a data signal and a second active element which regulates the current supplied to the organic electroluminescent element in accordance with the data signal, and a capacitive element storing the data signal, the present invention utilizes a part of the capacitive element arranged in one of the pixels for a light shielding member which shields the plurality of active elements arranged the one of the pixels from light emitted by the organic electroluminescent element arranged therein or another pixel adjacent thereto so as to suppress image quality deterioration and smear appearing in an image display area of the organic electroluminescent light emitting display device.

Claims (14)

1. An organic electroluminescent light emitting display device, comprising:

a substrate having a main surface;

a plurality of pixels arranged two-dimensionally on the main surface of the substrate;

a plurality of scanning signal lines arranged in parallel in a first direction on the main surface of the substrate;

a plurality of data signal lines arranged in parallel in a second direction which intersects the first direction on the main surface of the substrate;

a plurality of current supply lines arranged on the main surface of the substrate, wherein each of the plurality of pixels comprises:

a first active element,

a second active element,

an organic electroluminescent element having a lower electrode connected to one of the plurality of current supply lines via the second active element, and

a bank layer covering an edge of the lower electrode, and having an opening which forms a light emitting layer; and

a shielding layer arranged in a same layer as the scanning lines, wherein

an edge of the shielding layer in a planar structure of the pixel is projected to the light emitting layer side from the boundary between an edge of the bank layer and the light emitting layer.

2. An organic electroluminescent light emitting display device according to claim 1 , wherein the shielding layer is part of an electrode of a capacitor.

3. An organic electroluminescent light emitting display device according to claim 1 , wherein a distance of the edge of the shielding layer and the boundary between an edge of the bank layer and the light emitting layer is equal or more than 2 μm.

Assignments (7)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 30, 2018
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.; JAPAN DISPLAY INC.
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 046988/0801 →
CHANGE OF NAME Recorded Apr 15, 2014
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 032687/0745 →
CHANGE OF NAME Recorded Apr 15, 2014
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY INC.
Reel/Frame 032687/0860 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 8, 2013
From: SATO, TOSHIHIRO; KAWACHI, GENSHIRO; MIKAMI, YOSHIRO; ADACHI, MASAYA
To: HITACHI, LTD.
Reel/Frame 030375/0803 →
MERGER Recorded May 8, 2013
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 030375/0910 →
COMPANY SPLIT Recorded May 8, 2013
From: HITACHI, LTD.
To: HITACHI DISPLAYS, LTD.
Reel/Frame 030378/0803 →
COMPANY SPLIT DOCUMENTS WHICH CONVEY 50% OWNERSHIP TO EACH OF THE RECEIVING PARTIES Recorded May 8, 2013
From: HITACHI DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 030378/0823 →
Priority Claims (1)
JP 2002-056733 · Mar 4, 2002 · national
Continuity (5)
Continuation 13365057 · Feb 2, 2012
Continuation 12656519 · Feb 2, 2010
Continuation 11797190 · May 1, 2007
Continuation 10376331 · Mar 3, 2003
Related Publication 20130240863A1 · Sep 19, 2013