Display device

Patent metadata

Field	Value
Publication number	US-10886308-B2
Application number	US-201816028493-A
Country	US
Kind code	B2
Filing date	Jul 6, 2018
Priority date	Aug 9, 2017
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

A display device includes a flexible substrate, a plurality of thin film transistors (TFTs), a first electrode arranged between a channel of one of the plurality of TFTs and the flexible substrate, at least one inorganic insulating film arranged between one of the plurality of TFTs and the first electrode, a second electrode arranged on the opposite side to the side where one of the plurality of TFTs is arranged with respect to the first electrode, and an organic insulating film arranged between the first electrode and the second electrode.

First claim

What is claimed is:

1. A display device, comprising:
a flexible substrate;
a display region having a plurality of pixels on a first side of the flexible substrate;
a plurality of thin film transistors (TFTs) on the first side of the flexible substrate, one of the plurality of TFTs is included in one of the plurality of pixels;
a first electrode arranged between a channel of the one of the plurality of TFTs and the flexible substrate;
at least one inorganic insulating film arranged between the one of the plurality of TFTs and the first electrode;
a second electrode arranged on a second side of the flexible substrate opposite from the first side with respect to the first electrode;
an organic insulating film arranged between the first electrode and the second electrode, and
a first terminal on the first side of the flexible substrate, the first terminal has a conductive layer the same as a source electrode of the one of the plurality of TFTs or a drain electrode of the one of the plurality of TFTs,
wherein the second electrode is electrically connected to the first terminal via a conductive member,
the second electrode is configured of a single electrode overlapping with an entire display region uniformly,
the second electrode does not overlap with the first terminal,
the first electrode is arranged between a gate electrode of the one of the plurality of TFTs and the flexible substrate.

2. The display device according to claim 1 , wherein
the organic insulating film is arranged between the flexible substrate and the second electrode.

3. The display device according to claim 1 , wherein
the organic insulating film has a modulus of elasticity smaller than that of the flexible substrate and smaller than that of the second electrode.

4. The display device according to claim 1 wherein
a pattern of a signal input to the first electrode is different between a time period during which an image is displayed in the display region and other time periods.

5. The display device according to claim 1 , wherein
the first electrode is divided into at least two regions mutually separated from each other.

6. The display device according to claim 5 , wherein
the at least two regions include a first region and a second region,
the plurality of TFTs include a first TFT and a second TFT,
the first electrode of the first region is configured to apply a first voltage via the at least one inorganic insulating film to a channel of the first TFT, and
the first electrode of the second region is configured to apply a second voltage via the at least one inorganic insulating film to a channel of the second TFT.

7. The display device according to claim 6 , wherein
a first color corresponding to a first pixel to be driven by the first TFT and a second color corresponding to a second pixel to be driven by the second TFT are the same color.

8. The display device according to claim 5 further comprising a second terminal on the first side of the flexible substrate and a third terminal on the first side of the flexible substrate, wherein
the at least two regions include a first region and a second region,
a first signal is input from second terminal to the first electrode of the first region, and
a second signal is input from the third terminal to the first electrode of the second region.

9. The display device according to claim 8 , wherein
the first signal input to the first electrode of the first region and the second signal input to the first electrode of the second region are different signals.

10. The display device according to claim 1 , wherein
the second electrode is electrically connected to a casing of the display device.

11. The display device according to claim 1 wherein
a period of a signal input to the first electrode is between a first period when a part of the display region is written and a second period when another part of the display region is written.

Assignees

• Japan Display Inc

Inventors

• Ma Chunche
• Akimoto Hajime

Classifications

• H10D86/451

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/411

  characterised by materials, geometry or structure of the substrates · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title