Electroactive Optical Device

• US 20150261056A1
• Filed: 03/13/2015
• Published: 09/17/2015
• Est. Priority Date: 03/14/2014
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Kumar, Anil, Wilt, Truman, Votruba-Drzal, Peter L.
• Granted Patent: US 10,114,266 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 2001/1557 Side by side arrangements of working and counter electrodes
• CPC Class Codes: G02F 2202/043 pleochroic

Abstract

The present invention provides an electroactive optical device including an optical substrate having two opposing surfaces; at least two electrodes spaced one from the other and disposed on the surface of the substrate; and at least one electroactive material layer in contact with the at least two electrodes and the surface of the substrate.

The electroactive optical device has variable light transmittance in response to the magnitude of an applied electrical voltage.

Claims

1. An electroactive optical device comprising:

(a) an optical substrate having two opposing surfaces;

(b) at least two electrodes spaced one from the other and disposed on the surface of the substrate;

(c) at least one electroactive material layer in contact with the at least two electrodes (b) and the surface of the substrate (a),

wherein the electroactive optical device has variable light transmittance in response to the magnitude of an applied electrical voltage.

2. The electroactive optical device of claim 1, wherein the at least two electrodes (b) are comprised of a transparent conductive material.

3. The electroactive optical device of claim 1, wherein the electroactive material layer comprises electrochromic materials and/or electrochromic-dichroic materials.

4. The electroactive optical device of claim 1, wherein upon application of an applied voltage, the electroactive material layer reversibly changes from a first absorption state to a second absorption state.

5. The electroactive optical device of claim 4, wherein the first absorption state has essentially no absorption in the visible spectral region.

6. The electroactive optical device of claim 3, wherein the electroactive material layer comprises at least one electrochromic material and at least one dichroic material.

7. The electroactive optical device of claim 1, wherein the electroactive material layer comprises an electroactive-dichroic material.

8. The electroactive optical device of claim 6, wherein the electroactive material layer further comprises an anisotropic material.

9. The electroactive optical device of claim 1, further comprising an alignment facility, and wherein the electroactive material layer comprises a dichroic material which is at least partially aligned.

10. The electroactive optical device of claim 1, wherein the electroactive material layer is in the form of a polymeric coating layer or a polymeric gel layer.

11. The electroactive optical device of claim 1, further comprising one or more protective coating layers applied to the electroactive material layer (c), and/or the surface of the optical substrate (a) which is opposite the surface comprising the electroactive layer (c) and the electrodes (b).