IP Library Granted Patent US 12,255,192
Granted Patent B2
US 12,255,192 · App. 17/396,826 · Granted Mar 18, 2025

Display device

Inventors: Masanobu Ikeda (Tokyo, JP); Yoshinori Aoki (Tokyo, JP); Akihiro Ogawa (Tokyo, JP)
Assignee: JAPAN DISPLAY INC.
H01L25/167
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Quick Facts
Patent No.
US 12,255,192
App. No.
17/396,826
Granted
Mar 18, 2025
Kind
B2
Abstract

A display device includes a display portion mounted with a first LED and a second LED are mounted, a pixel circuit portion provided with a first pixel-circuit thin film transistor electrically connected to the first LED and a second pixel-circuit thin film transistor electrically connected to the second LED, a drive circuit portion provided with a drive-circuit thin film transistor, and a shielding layer provided between the display portion and the drive circuit portion. A fixed potential is applied to the shielding layer. The second LED overlaps the drive circuit portion with the shielding layer therebetween.

Claims (18)

1. A display device comprising:

a display portion mounted with a first LED and a second LED;

a pixel circuit portion provided with a first pixel-circuit thin film transistor electrically connected to the first LED and a second pixel-circuit thin film transistor electrically connected to the second LED, the pixel circuit portion being arranged in a central portion of a substrate;

a drive circuit portion provided with a drive-circuit thin film transistor comprising a part of a scanning driving circuit, the drive circuit portion being arranged adjacent to the pixel circuit portion; and

a shielding layer provided between the display portion and the drive circuit portion,

wherein

a fixed potential is applied to the shielding layer,

the first LED overlaps the pixel circuit portion, and

the second LED overlaps the drive circuit portion with the shielding layer therebetween.

2. The display device according to claim 1 , wherein the drive circuit portion is surrounded by the pixel circuit portion.

3. The display device according to claim 1 , wherein the fixed potential is a potential applied to a first electrode of the first LED and a second electrode of the second LED.

4. The display device according to claim 1 , wherein the shielding layer is provided over a first flattening layer covering the drive-circuit thin film transistor.

5. The display device according to claim 4 , wherein each of the first LED and the second LED is provided over a second flattening layer covering the shielding layer.

6. The display device according to claim 4 , further comprising:

a conductive layer and an inorganic insulating layer between the first flattening layer and the shielding layer,

wherein the shielding layer overlaps the conductive layer with the inorganic insulating layer therebetween.

7. The display device according to claim 1 , wherein each of the first LED and the second LED has a horizontal electrode structure.

8. The display device according to claim 1 , wherein each of the first LED and the second LED has a vertical electrode structure.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2025
From: JAPAN DISPLAY INC.
To: MAGNOLIA WHITE CORPORATION
Reel/Frame 072130/0313 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 9, 2021
From: IKEDA, MASANOBU; AOKI, YOSHINORI; OGAWA, AKIHIRO
To: JAPAN DISPLAY INC.
Reel/Frame 057117/0602 →
Priority Claims (1)
JP 2020-141061 · Aug 24, 2020 · national
Continuity (1)
Related Publication 20220059517A1 · Feb 24, 2022
References Cited (9)
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English machine translation of Office Action dated Feb. 27, 2024 issued in JP Appl. No. 2020-141061. [JP-OA1], 5 pages. [cited by applicant]
Cited By (1)
US 12,733,322