WINDOW SHADING SYSTEM

• US 20080143896A1
• Filed: 02/28/2008
• Published: 06/19/2008
• Est. Priority Date: 05/06/2003
• Status: Abandoned Application

• Current Assignee: Electronically Shaded Glass, Inc.
• Original Assignee: Electronically Shaded Glass, Inc.
• Inventors: Yurth, David G.
• Application Number:
  US12/039,168
• Publication Number:
  US 20080143896A1
• Time in Patent Office: Days
• US Class Current: 349/16
• CPC Class Codes: E06B 2009/2464 featuring transparency control by applying voltage, e.g. LCD, electrochromic panels
• CPC Class Codes: E06B 9/24 Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blindsoperating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence

Abstract

An electronically shaded glass window shading system is described that provides a progressively darkening window, based on either user input or detection of ambient light. The electronically shaded glass window shading system may be used for commercial buildings, residential buildings, public areas, and vehicles. The electronically shaded glass window shading system may enhance energy efficiency by blocking bright light thereby reducing heat. The electronically shaded glass window shading system includes a user interface that permits a user to create opaque or alternatively transparent walls or windows as the need arises.

Claims

1. A window shading system, comprising:

a first transparent panel including a first side and a second side;

a first electrically conductive layer attached to the second side of the first transparent panel;

a second transparent panel, having a first side and a second side;

a second electrically conductive layer attached to the second side of the second transparent panel;

a dichroric dyed liquid crystal panel held between the first electrically conductive layer and the second electrically conductive layer; and

an electrical signal source in electronic communication with the first electrically conductive layer and the second electrically conductive layer.

2. The system of claim 1 further including:

a first dielectric layer disposed on the first electrically conductive layer;

a first polymer layer disposed on the first dielectric layer;

a second dielectric layer disposed on the second electrically conductive layer, and

a second polymer layer disposed on the second dielectric layer.

3. The system of claim 1, further comprising an electronic control circuit in communication with the electrical signal source.

4. The system of claim 3, further including a power supply in electrical communication with the electronic control circuit.

5. The system of claim 1, wherein the dyed liquid crystal is dyed with at least one anthraquinone compound.

6. The system of claim 1, wherein the dyed liquid crystal is dyed with at least one azo compound.

7. The system of claim 1, wherein the dyed liquid crystal is dyed with at least one azulene compound.

8. The system of claim 1, further comprising:

a frame holding the first transparent panel and the second transparent panel in place; and

a spacer set between the first transparent panel and the second transparent panel to provide a gap.

9. The system of claim 1, wherein the first and the second transparent panels are composed of a material selected from transparent aluminum, glass, plastic, and polycarbonite.

10. The system of claim 1, wherein the first and the second electrically conductive layers are composed of indium tin oxide.

11. The system of claim 4, wherein the power supply is selected from the group consisting of:

a photovoltaic cell, a battery, and an AC power source.

12. The shading system of claim 1, further including a photovoltaic film fixed to the first side of the first transparent panel.

14. The window shading system of claim 11, further including:

a frame;

a first transparent panel affixed to the first electrically conductive layer on a second side thereof;

a second transparent panel affixed to the second electrically conductive layer on a second side thereof,

a first gap between the first electrically conductive layer and the liquid crystal;

a second gap between the second electrically conductive layer and the liquid crystal; and

an electrical signal source in electronic communication with the first electrically conductive layer and the second electrically conductive layer.

15. The window shading system of claim 14, wherein the controller further includes:

a modulating circuit; and

a programmable processing unit in electronic communication with the modulating circuit.

16. The window shading system of claim 15, further including a sensor for detecting light and light attributes, wherein sensor is responsive to light attributes selected from the group consisting of intensity, wavelength, brightness, luminance, and combinations thereof.

13. An window shading system, comprising:

a shadable window unit including a dichroric dye dispersed in a liquid crystal, wherein the liquid crystal is disposed between a first electrically conductive layer and a second electrically conductive layer;

controller in electronic communication with the shadable window unit; and

a user interface in communication with the controller.

17. A method comprising responding to ambient light at a window shading system, wherein responding to the ambient light comprises:

applying a potential across a dichroric-dyed liquid crystal disposed in the window shading system, and wherein the dichroric-dyed liquid crystal reduces transparency or light transmissivity through the dichroric-dyed liquid crystal.

18. The method of claim 17, wherein the window shading system includes:

a shadable window unit including the dichroric dye dispersed in the liquid crystal, wherein the liquid crystal is disposed between a first electrically conductive layer and a second electrically conductive layer; and

a controller in electronic communication with the shadable window unit, wherein the controller is used to respond to the ambient light.

19. The method of claim 17, wherein responding to ambient light includes using a control circuit to provide at least one of an intensity, waveform, amplitude, frequency, and a phase modulated voltage signal to the dichroric-dyed liquid crystal.

20. The method of claim 17, wherein applying the potential includes applying a potential across at least one dichroric die selected from an anthraquinone compound, an azo compound, an azulene compound, a merocyanine compound, a tetraline compound, and combinations thereof.