LIGHT-EMITTING AND ELECTROCHROMIC DISPLAY DEVICE AND ASSOCIATED FABRICATION METHOD

• US 20150212383A1
• Filed: 08/13/2013
• Published: 07/30/2015
• Est. Priority Date: 08/14/2012
• Status: Abandoned Application

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Original Assignee: Commissariat A L'Energie Atomique et AUX Energies Alternatives
• Inventors: Oukassi, Sami
• Application Number:
  US14/420,162
• Publication Number:
  US 20150212383A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Abstract

The display device comprises a first display element (1) comprising a first stack (2) of layers and a second display element (3) comprising a second stack (4) of layers. The first and second display elements (1, 3) are disposed side by side so as to bound a first, exclusively light-emitting, display area (Z1) associated with the first display element (1) and a second, exclusively electrochromic, display area (Z2) associated with the second display element (3).

Claims

1. A display device comprising

a first display element comprising a first stack of layers, and

a second display element comprising a second stack of layers,

wherein the first and second display elements are disposed side by side so as to bound a first, exclusively light-emitting, display area associated with the first display element and a second, exclusively electrochromic, display area associated with the second display element.

2. The device according to claim 1, wherein the first stack comprises at least one layer of a same material as a layer of the second stack.

3. The device according to claim 2, wherein the first stack comprises a layer forming at least one current collector of the said first stack of the same material as a layer of the second stack forming a current collector of the second stack.

4. The device according to claim 2, wherein the first stack comprises a light-emitting layer of the same material as a layer forming a current collector the second stack.

5. The device according to claim 2, wherein the second stack comprises a layer forming an electrolyte of the same material as a layer of the first stack forming an electrical insulation between a current collector of the first stack and a light-emitting layer of the first stack.

6. The device according to claim 1, wherein the first display element comprises a plurality of first stacks disposed side by side and forming the associated light-emitting display area.

7. The device according to claim 1, wherein the first stack runs along a support substrate and the second stack extends upwards from the support substrate in a direction opposite to the support substrate.

8. The device according to claim 1, comprising a module for driving the display configured so as to selectively make the display operate in the following modes:

an exclusively light-emitting display mode,

an exclusively electrochromic display mode,

a light-emitting and electrochromic display mode.

9. The device according to claim 1, wherein each layer of the first stack is also present in the second stack.

10. A method for fabrication of the display device according to claim 1, wherein the method comprises a step of forming the first display element and the second display element.

11. The method according to claim 10, wherein the formation step comprises a first step of depositing a first material carried out so as to simultaneously form a layer of the first stack and a layer of the second stack with the first material.

12. The method according to claim 11, wherein the first material is chosen from amongst:

a material (M1) forming, after its deposition, a layer designed to form at least one current collector of the first stack and a layer designed to form one of the current collectors of the second stack, or

a material (M2) forming, after its deposition, a light-emitting layer of the first stack and a layer designed to form one of the current collectors of the second stack, or

a material forming, after its deposition, a layer designed to form an electrolyte of the second stack, and a layer designed to form an electrical insulation between at least one current collector of the first stack and a light-emitting layer of the first stack.

13. The method according to claim 11, wherein the formation step comprises a second step of depositing a second material configured so as to simultaneously form a layer of the first stack and a layer of the second stack with the second material.

14. The method according to claim 13, wherein the second material is chosen from amongst:

a material (M1) forming, after its deposition, a layer designed to form at least one current collector, preferably two current collectors, of the first stack and a second layer designed to form one of the current collectors of the second stack, or

a material (M2) forming, after its deposition, a light-emitting layer of the first stack and a layer designed to form one of the current collectors of the second stack, or

a material (M3) forming, after its deposition, a layer designed to form an electrolyte of the second stack, and a layer designed to form an electrical insulation between at least one current collector of the first stack and a light-emitting layer of the first stack,

wherein the second material is distinct from the first material.

15. The method according to claim 13, wherein the formation step comprises a third step of depositing a third material configured so as to simultaneously form a layer of the first stack and a layer of the second stack with the third material.

16. The method according to claim 15, wherein the third material is chosen from amongst:

a material (M1) forming, after its deposition, a layer designed to form at least one current collector of the first stack and a layer designed to form one of the current collectors of the second stack, or

a material (M2) forming, after its deposition, a light-emitting layer of the first stack and a layer designed to form one of the current collectors of the second stack, or

a material (M3) forming, after its deposition, a layer designed to form an electrolyte of the second stack, and a layer designed to form an electrical insulation between at least one current collector of the first stack and a light-emitting layer of the first stack,

wherein the third material is distinct from the first material and from the second material.

22. The method according to claim 12, wherein the first material is the material (M1) and the layer designed to form at least one current collector of the first stack is designed to form at least two current collectors of the first stack.

23. The method according to claim 12, wherein the first material is the material (M3) and the layer designed to form an electrical insulation between at least one current collector of the first stack and the light-emitting layer of the first stack is designed to form an electrical insulation between at least two current collectors of the first stack and the light-emitting layer of the first stack.

24. The method according to claim 14, wherein the second material is the material (M3) and the layer designed to form an electrical insulation between at least one current collector of the first stack and a light-emitting layer of the first stack is designed to form an electrical insulation between at least two current collectors of the first stack and the light-emitting layer of the first stack.

25. The method according to claim 16, wherein the third material is the material (M1) and the layer designed to form at least one current collector of the first stack is designed to form at least two current collectors of the first stack.

17-21. -21. (canceled)