Display device and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-10088732-B2
Application number	US-201615368079-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Mar 14, 2002
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A constitution of the display device of the invention is shown in the following. The display device includes a pixel unit including TFTs of which the active layer contains an organic semiconductor material for forming channel portions in the opening portions in an insulating layer arranged to meet the gale electrodes. The pixel unit further includes a contrast media formed on the electrodes connected to the TFTs for changing the reflectivity upon the application of an electric field, or microcapsules containing electrically charged particles that change the reflectivity upon the application of an electric field. The pixel unit is sandwiched by plastic substrates, and barrier layers including an inorganic insulating material are provided between the plastic substrates and the pixel unit. The purpose of the present invention is to supply display devices which are excellent in productivity, light in weight and flexible.

First claim

What is claimed is:

1. A display device comprising:
a barrier layer over a substrate;
a transistor over the barrier layer;
a pixel electrode electrically connected to the transistor;
a partitioning layer over the pixel electrode; and
an electronic ink layer over the pixel electrode,
wherein the barrier layer comprises nitrogen.

2. The display device according to claim 1 , wherein the substrate comprises polyimide.

3. The display device according to claim 1 , wherein the transistor comprises an organic semiconductor material in a channel portion.

4. The display device according to claim 1 , wherein the barrier layer comprises AlO x N 1-x where x=0.01 to 0.2.

5. The display device according to claim 1 , wherein the barrier layer comprises silicon nitride.

6. The display device according to claim 1 ,
wherein the electronic ink layer comprises a first particle of a first color that is positively charged and a second particle of a second color that is negatively charged, and
wherein the first particle and the second particle are dispersed in a solvent contained in a microcapsule.

7. The display device according to claim 1 , wherein the partitioning layer covers an edge portion of the pixel electrode.

8. A display device comprising:
a barrier layer over a substrate;
a transistor over the barrier layer;
a pixel electrode electrically connected to the transistor;
a partitioning layer over the pixel electrode; and
an electronic ink layer over the pixel electrode,
wherein the barrier layer comprises nitrogen and aluminum.

9. The display device according to claim 8 , wherein the substrate comprises polyimide.

10. The display device according to claim 8 , wherein the transistor comprises an organic semiconductor material in a channel portion.

11. The display device according to claim 8 , wherein the barrier layer comprises AlO x N 1-x where x=0.01 to 0.2.

12. The display device according to claim 8 ,
wherein the electronic ink layer comprises a first particle of a first color that is positively charged and a second particle of a second color that is negatively charged, and
wherein the first particle and the second particle are dispersed in a solvent contained in a microcapsule.

13. The display device according to claim 8 , wherein the partitioning layer covers an edge portion of the pixel electrode.

14. A display device comprising:
a barrier layer over a flexible substrate;
a transistor over the barrier layer;
a pixel electrode electrically connected to the transistor;
a partitioning layer over the pixel electrode; and
an electronic ink layer over the pixel electrode,
wherein the barrier layer comprises nitrogen and aluminum.

15. The display device according to claim 14 , wherein the flexible substrate comprises polyimide.

16. The display device according to claim 14 , wherein the transistor comprises an organic semiconductor material in a channel portion.

17. The display device according to claim 14 , wherein the barrier layer comprises AlO x N 1-x where x=0.01 to 0.2.

18. The display device according to claim 14 ,
wherein the electronic ink layer comprises a first particle of a first color that is positively charged and a second particle of a second color that is negatively charged, and
wherein the first particle and the second particle are dispersed in a solvent contained in a microcapsule.

19. The display device according to claim 14 , wherein the partitioning layer covers an edge portion of the pixel electrode.

20. A display device comprising:
a barrier layer over a substrate;
a gate electrode over the barrier layer;
a semiconductor layer over the gate electrode;
a source and drain electrodes over the semiconductor layer;
a pixel electrode over the source and drain electrodes; and
an electronic ink layer over the pixel electrode,
wherein the barrier layer comprises nitrogen.

21. The display device according to claim 20 , wherein the substrate comprises polyimide.

22. The display device according to claim 20 , wherein the semiconductor layer comprises an organic material.

23. The display device according to claim 20 , wherein the barrier layer comprises silicon nitride.

24. The display device according to claim 20 ,
wherein the electronic ink layer comprises a first particle of a first color that is positively charged and a second particle of a second color that is negatively charged, and
wherein the first particle and the second particle are dispersed in a solvent contained in a microcapsule.

Assignees

• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Arai Yasuyuki

Classifications

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/1681

  having two or more microcells partitioned by walls, e.g. of microcup type · CPC title

• G09G3/344

  based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167) · CPC title

• G09F9/372

  the positions of the elements being controlled by the application of an electric field · CPC title

• G02B26/026

  based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays (based on orientable dipolar particles G02F1/172; based on electrophoresis G02F1/167) · CPC title