Display panel and method for manufacturing the same, electronic paper including the same and driving method thereof

• US 10,247,976 B2
• Filed: 08/15/2017
• Issued: 04/02/2019
• Est. Priority Date: 09/29/2016
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Bai, Bing, Park, Inho, Chen, Weitao, Sun, Hanyan, Li, Na
• Primary Examiner(s): Ghebretinsae, Temesghen
• Assistant Examiner(s): Martinez Quiles, Ivelisse
• Application Number:
  US15/677,774
• Publication Number:
  US 20180088382A1
• Time in Patent Office: 595 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 3/3433 using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs

Abstract

A display panel and a method for manufacturing the same, an electronic paper and a driving method thereof are provided. The display panel includes: a first base substrate, a second base substrate arranged oppositely to the first base substrate, and multiple temperature-induced transmittance reversible components which not contacted with each other and arranged in an array between the first base substrate and the second base substrate. Each of the temperature-induced transmittance reversible components includes: a temperature-induced transmittance reversible unit and a temperature control unit. The temperature control unit is used to adjust temperature of the temperature-induced transmittance reversible unit to control transmittance of the temperature-induced transmittance reversible unit with respect to the visible light.

Claims

1. A display panel, comprising:

a first base substrate;

a second base substrate arranged oppositely to the first base substrate; and

a plurality of temperature-induced transmittance reversible components that are not contacted with each other and arranged in an array between the first base substrate and the second base substrate;

wherein each of the plurality of temperature-induced transmittance reversible components comprises;

a temperature-induced transmittance reversible unit and a temperature control unit, the temperature control unit is configured to adjust temperature of the temperature-induced transmittance reversible unit to control transmittance of the temperature-induced transmittance reversible unit with respect to visible light;

wherein the display panel further comprises a plurality of reflection units arranged in an array;

wherein each of the plurality of reflection units is composed of monochrome reflectors for reflecting light waves of different colors;

wherein light of one color can be reflected by each of the monochrome reflectors included in each of the plurality of reflection units, and light of different colors can be reflected by each of the plurality of reflection units after light reflected by multiple monochrome reflectors is mixed;

wherein each of the monochrome reflectors corresponds to one of the plurality of temperature-induced transmittance reversible components in a direction perpendicular to the display panel, and different monochrome reflectors correspond to different temperature-induced transmittance reversible components;

wherein each of the plurality of temperature-induced transmittance reversible components and a corresponding one of the plurality of reflection units are arranged sequentially in a light incidence direction of the display panel.

2. The display panel according to claim 1, wherein the temperature control unit is a heating unit and the heating unit is in contact with the temperature-induced transmittance reversible unit.

3. The display panel according to claim 2, further comprising:

a plurality of gate lines and a plurality of data lines which are crisscrossed, a voltage line and a plurality of thin film transistors, wherein each of the plurality of temperature-induced transmittance reversible components corresponds to one of the plurality of thin film transistors,

wherein gate electrodes of thin film transistors in each line are connected to one of the gate lines, each drain electrode of each of the thin film transistors in each line is connected to a first connection terminal of a corresponding heating unit in each line, source electrodes of the thin film transistors in each line are connected to one of the data lines, and a second connection terminal of each of the corresponding heating unit is connected to the voltage line.

4. The display panel according to claim 1, further comprising a thermal insulating layer which separates all of the temperature-induced transmittance reversible components from each other.

5. The display panel according to claim 4, wherein the temperature-induced transmittance reversible unit is a mixture of a water-soluble polymer, an inorganic salt and water.

6. The display panel according to claim 5, wherein the water-soluble polymer is any one or combination of polystyrene, oxidized polypropylene, polyvinyl alcohol, hydroxyethylcellulose, hydroxypropylcellulose, and the inorganic salt is any one or combination of sodium salt, potassium salt, magnesium salt, calcium salt.

7. The display panel according to claim 1, wherein the temperature-induced transmittance reversible unit is a mixture of a water-soluble polymer, an inorganic salt, a curing agent and water.

8. The display panel according to claim 1, further comprising a transparent packaging layer, wherein the transparent packaging layer packages the plurality of temperature-induced transmittance reversible components.

9. The display panel according to claim 1, wherein each of the monochrome reflectors comprises:

a reflection subunit and a monochrome subunit, the monochrome subunit is capable of passing only light of one color through;

the monochrome subunit and the reflection subunit are arranged sequentially in the light incidence direction of the display panel.

10. The display panel according to claim 1, wherein each of the plurality of reflection units comprises:

a red reflection subunit, a green reflection subunit and a blue reflection subunit.

11. The display panel according to claim 1, further comprising black matrices arranged among the monochrome reflectors.

12. The display panel according to claim 1, wherein each of plurality of the temperature-induced transmittance reversible components and the corresponding one of the plurality of reflection units are arranged on an inside of one of the first base substrate and the second base substrate.

13. The display panel according to claim 1, wherein each of the plurality of temperature-induced transmittance reversible components and the corresponding one of the plurality of reflection units are arranged on an inside of the first base substrate and an inside of the second base substrate, respectively.

14. The display panel according to claim 1, wherein in each of the plurality of temperature-induced transmittance reversible components, the temperature control unit is within the temperature-induced transmittance reversible unit.

15. An electronic paper, comprising the display panel according to claim 1.

16. A driving method for an electronic paper according wherein the electronic paper comprises a display panel that includes:

a first base substrate;

a second base substrate arranged oppositely to the first base substrate; and

a plurality of temperature-induced transmittance reversible components that are not contacted with each other and arranged in an array between the first base substrate and the second base substrate;

wherein each of the plurality of temperature-induced transmittance reversible components comprises;

a temperature-induced transmittance reversible unit and a temperature control unit, the temperature control unit is configured to adjust temperature of the temperature-induced transmittance reversible unit to control transmittance of the temperature-induced transmittance reversible unit with respect to visible light;

wherein the temperature control unit is a heating unit and the heating unit is in contact with the temperature-induced transmittance reversible unit;

wherein the display panel of the electronic paper further comprises;

a plurality of gate lines and a plurality of data lines which are crisscrossed, a voltage line and a plurality of thin film transistors, each of the temperature-induced transmittance reversible components corresponds to one of the plurality of thin film transistors, gate electrodes of thin film transistors in each line are connected to one of the plurality of gate lines, each drain electrode of each of the thin film transistors in each line is connected to a first connection terminal of the a corresponding heating unit in each line, source electrodes of the thin film transistors in each line are connected to one of the plurality of data lines, and a second connection terminal of each of the corresponding heating unit is connected to the voltage line;

wherein the method comprises;

inputting a scanning signal to each of the plurality of gate lines sequentially according to sequences of the plurality of gate lines; and

inputting a data signal to source electrodes of the plurality of thin film transistors connected to any one of the plurality of gate lines through the plurality of data lines to control the corresponding heating unit connected to each of the plurality of thin film transistors to generate heat, when a gate line is scanned.

17. A method for manufacturing a display panel, comprising:

forming a plurality of temperature-induced transmittance reversible components that are not contacted with each other and arranged in an array on a substrate, in such a manner that each of the plurality of temperature-induced transmittance reversible components comprises a temperature-induced transmittance reversible unit and a temperature control unit, and the temperature control unit is configured to adjust temperature of the temperature-induced transmittance reversible unit to control transmittance of the temperature-induced transmittance reversible unit with respect to visible light; and

forming a thermal insulating film on the substrate and patterning the thermal insulating film to form a netlike thermal insulating layer;

wherein the forming the plurality of temperature-induced transmittance reversible components that are not contacted with each other and arranged in the array on the substrate comprises;

filling a fluid temperature-induced transmittance reversible material into netlike regions of the thermal insulating layer, wherein the temperature-induced transmittance reversible material is obtained by mixing a water-soluble polymer, an inorganic salt and water.

18. The method according to claim 17, wherein the forming the plurality of temperature-induced transmittance reversible components that are not contacted with each other and arranged in the array on the substrate comprises:

forming a temperature-induced transmittance reversible film on the substrate and patterning the temperature-induced transmittance reversible film to form a plurality of temperature-induced transmittance reversible units that are not contacted with each other and arranged in an array,

wherein the temperature-induced transmittance reversible film is made by mixing a water-soluble polymer, an inorganic salt, a curing agent and water.