Display panel, display device, display panel manufacturing method and display method

Patent metadata

Field	Value
Publication number	US-2016238917-A1
Application number	US-201314379507-A
Country	US
Kind code	A1
Filing date	Sep 24, 2013
Priority date	Jul 22, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

A display panel includes a display layer and two electrophoresis layers; the display layer is located between the two electrophoresis layers; the display layer has two display surfaces; each of the two electrophoresis layers comprises a plurality of electrophoresis units, and states of the electrophoresis units include transparent state and non-transparent state. The display panel can implement single-side display, two-side display and completely-transparent display and has a simple structure, thereby leading to a reduced thickness.

First claim

1 . A display panel comprising a display layer and two electrophoresis layers, wherein the display layer is located between the two electrophoresis layers;
the display layer has two display surfaces; each of the two electrophoresis layers comprises a plurality of electrophoresis units, and states of the electrophoresis units include a transparent state and a non-transparent state.

2 . The display panel of claim 1 , wherein the display layer comprises an array comprising a plurality of pixel units, and the pixel units are in one-to-one correspondence to electrophoresis units of each of the two electrophoresis layers.

3 . The display panel of claim 1 , wherein the electrophoresis units comprise two transparent electrode layers disposed oppositely, and the transparent electrode layers are plane electrode layers or patterned electrode layers.

4 . The display panel of claim 3 , wherein the transparent electrode layers are parallel to the display layer or the transparent electrode layers are perpendicular to the display layer.

5 . The display panel of claim 4 , wherein in the case where the transparent electrode layers are perpendicular to the display layer, there is further another transparent electrode layer disposed perpendicularly to the two transparent electrode layers disposed oppositely between the two transparent electrode layers disposed oppositely.

6 . The display panel of claim 3 , wherein the electrophoresis units comprise liquid and black particles that move under an action of an electric field formed between the two transparent electrode layers disposed oppositely to switch the electrophoresis units between the transparent state and the non-transparent state.

7 . The display panel of claim 6 , wherein the electrophoresis units comprise micro-capsules, and the liquid and black particles are contained in the micro-capsules.

8 . The display panel of claim 6 , wherein the pixel units are organic light emitting diodes.

9 . The display panel of claim 8 , wherein the organic light emitting diode comprises an anode, an organic layer and a cathode formed on a base substrate; and the organic layer is between the anode and the cathode and the organic layer comprises a light emitting layer.

10 . A display device comprising the display panel of claim 1 .

11 . A manufacturing method of display panels, comprising:
forming a display layer for two-side display on one side of a first substrate; forming a first electrophoresis layer between an other side of the first substrate and a second substrate, the first electrophoresis comprising a plurality of electrophoresis units with a transparent state and a non-transparent state; disposing a third substrate on the display layer; and forming a second electrophoresis layer between one side of the third substrate, which side is apart from the display layer, and a fourth substrate, the second electrophoresis layer comprising a plurality of electrophoresis units with a transparent state and a non-transparent state.

12 . The manufacturing method of claim 11 , wherein the first electrophoresis layer comprises a first transparent electrode layer and a second transparent electrode layer; and the first transparent electrode layer and the second transparent electrode layer are disposed on the first substrate and the second substrate respectively.

13 . The manufacturing method of claim 11 , wherein the second electrophoresis layer comprises a third transparent electrode layer and a fourth transparent electrode layer; and the third transparent electrode layer and the fourth transparent electrode layer are disposed on the third substrate and the fourth substrate respectively.

14 . The manufacturing method of claim 11 , wherein the first electrophoresis layer includes a first transparent electrode layer, a second transparent electrode layer and a third transparent electrode layer; and the first transparent electrode layer is disposed on the first substrate or the second substrate; the second transparent electrode layer and the third transparent electrode layer are disposed on two sides of the electrophoresis units respectively, the second transparent electrode layer and the third transparent electrode layer are perpendicular to the first substrate and second substrate respectively.

15 . The manufacturing method of claim 11 , wherein the second electrophoresis layer comprises a fourth transparent electrode layer, a fifth transparent electrode layer and a sixth transparent electrode layer; and the fourth transparent electrode layer is disposed on the third substrate or the fourth substrate; the fifth transparent electrode layer and the sixth transparent electrode layer are disposed on two sides of the electrophoresis units respectively, the fifth transparent electrode layer and the sixth transparent electrode layer are perpendicular to the third substrate and fourth substrate respectively.

16 . The manufacturing method of claim 11 , wherein micro-capsules are provided in the electrophoresis units and the micro-capsules comprise liquid and black charged particles.

17 . The manufacturing method of claim 11 , wherein liquid containing black particles is injected into the electrophoresis units, and the liquid containing black particles is disposed between the first substrate and the second substrate or between the third substrate and the fourth substrate.

18 . The manufacturing method of claim 11 , wherein forming of the display layer of two-side display comprises:
forming an anode on the first substrate; forming a pixel defining layer for separating pixel areas; and forming a hole transport layer, a light emitting layer, an electron transport layer and a cathode in turn in the pixel areas separated by the pixel defining layer.

19 . A display method for a display panel applying the display panel of claim 1 , the method comprising:
controlling states of electrophoresis units of the electrophoresis layer to implement single-side display or two-side display.

20 . The method of claim 19 , wherein controlling states of electrophoresis units of the electrophoresis layer to implement single-side display comprises:
controlling all the electrophoresis units in one electrophoresis layer to be transparent state; and controlling all the electrophoresis units in another electrophoresis layer to be non-transparent state.

21 . The method of claim 19 , wherein controlling states of electrophoresis units of the electrophoresis layer to implement two-side display comprises:
controlling odd numbered rows of electrophoresis units of one electrophoresis layer to be transparent state and even numbered rows of electrophoresis units to be non-transparent state; controlling odd numbered rows of electrophoresis units of an other electrophoresis layer to be non-transparent state and even numbered rows of electrophoresis units to be transparent state; and displaying dependent on regions of the display layer, in which odd numbered rows of pixel units of the display layer display one picture, while even numbered rows of pixel units of the display layer display another picture.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Zhang Chunbing

Classifications

• G02F1/167 Primary

  by electrophoresis · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• G02F1/1347 Primary

  Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells · CPC title

• H01L51/56

  Electricity · mapped topic

• H01L27/3267

  Electricity · mapped topic