Light modulation device

• US 10,261,382 B2
• Filed: 11/16/2016
• Issued: 04/16/2019
• Est. Priority Date: 12/22/2015
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Tae-Youb, Kim, Yong Hae, Cho, Seong-Mok, Yang, Jong-Heon, Pi, Jae-Eun
• Primary Examiner(s): Ben, Loha
• Application Number:
  US15/353,682
• Publication Number:
  US 20170176834A1
• Time in Patent Office: 881 Days
• Field of Search: 359265, 359267, 359270, 359275, 359279, 359316, 359558, 359563, 359566, 345 49, 345105, 428432, 428442
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/15 based on an electrochromic effect
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 1/29 for the control of the position or the direction of light beams, i.e. deflection
• CPC Class Codes: G02F 2001/1536 additional, e.g. protective, layer inside the cell
• CPC Class Codes: G09G 3/38 using electrochromic devices

Abstract

Provided is a light modulating device including a light modulating unit provided on a substrate, a driving unit electrically connected to the light modulating unit and configured to drive the light modulating unit, and a cover disposed on the light modulating unit and configured to seal the light modulating unit, wherein the light modulating unit comprises an electrochromic device.

Claims

1. A light modulation device comprising:

a light modulating unit provided on a substrate;

a driving unit electrically connected to the light modulating unit and configured to drive the light modulating unit; and

a cover disposed on the light modulating unit and configured to seal the light modulating unit,

wherein the light modulating unit comprises an electrochromic device, and

wherein an internal space is provided between the cover and the light modulating unit, and a sealing gas comprising hydrogen is provided to the internal space.

2. The light modulation device of claim 1, wherein the sealing gas further comprises an inert gas.

3. The light modulation device of claim 1, wherein the electrochromic device comprises:

first and second electrodes;

a first electrochromic layer disposed on the first electrode;

a second electrochromic layer disposed under the second electrode; and

an electrolyte layer between the first and second electrochromic layers,

wherein each of the first and second electrodes, each of the first and second electrochromic layers, and the electrolyte layer are provided in a solid state.

4. The light modulation device of claim 1, wherein the electrochromic device comprises:

first and second electrodes;

a first electrochromic layer disposed on the first electrode;

a second electrochromic layer disposed under the second electrode;

an electrolyte layer between the first and second electrochromic layers; and

a hydrogen absorption film between the electrolyte layer and at least one of the first and second electrochromic layers.

5. The light modulation device of claim 4, wherein the electrolyte layer is solid and porous.

6. The light modulation device of claim 1, further comprising:

a protection layer stacked on the substrate,

wherein the light modulating unit is provided inside the protection layer.

7. The light modulation device of claim 1, wherein the electrochromic device is provided in plurality.

8. A light modulation device comprising:

electrochromic devices that are two-dimensionally arranged on a substrate;

a driving unit for driving the electrochromic devices;

a protection layer stacked on the substrate and configured to protect the electrochromic devices; and

a cover configured to seal the electrochromic devices,

wherein each of the electrochromic devices is provided in a solid state, and

wherein a sealing gas is provided to internal spaces between the cover and the electrochromic devices.

9. The light modulation device of claim 8,

wherein the sealing gas comprises at least one of hydrogen and an inert gas.

10. A light modulation device comprising:

a light modulating unit provided on a substrate;

a driving unit electrically connected to the light modulating unit and configured to drive the light modulating unit; and

a cover disposed on the light modulating unit and configured to seal the light modulating unit,

wherein the light modulating unit comprises an electrochromic device, and

wherein the electrochromic device comprises;

first and second electrodes;

a first electrochromic layer disposed on the first electrode;

a second electrochromic layer disposed under the second electrode;

an electrolyte layer between the first and second electrochromic layers; and

a hydrogen absorption film between the electrolyte layer and at least one of the first and second electrochromic layers.

11. The light modulation device of claim 10, wherein an internal space is provided between the cover and the light modulating unit, and a sealing gas comprising hydrogen is provided to the internal space.

12. The light modulation device of claim 11, wherein the sealing gas further comprises an inert gas.

13. The light modulation device of claim 10, wherein each of the first and second electrodes, each of the first and second electrochromic layers, and the electrolyte layer are provided in a solid state.

14. The light modulation device of claim 10, further comprising:

a protection layer stacked on the substrate,

wherein the light modulating unit is provided inside the protection layer.

15. The light modulation device of claim 10, wherein the electrochromic device is provided in plurality.